7:1:1:1     On the phase identity and its thermal evolution of lead free (Bi1/2Na1/2)TiO3-6 mol% BaTiO3
DOI:10.1063/1.3645054  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:130  AU: Jo, Wook;Schaab, Silke;Sapper, Eva;Schmitt, Ljubomira A.;Kleebe, Hans-Joachim;Bell, Andrew J.;Roedel, Juergen;
7:1:1:2     Evolving morphotropic phase boundary in lead-free (Bi1/2Na1/2)TiO3-BaTiO3 piezoceramics
DOI:10.1063/1.3530737  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:136  AU: Jo, Wook;Daniels, John E.;Jones, Jacob L.;Tan, Xiaoli;Thomas, Pamela A.;Damjanovic, Dragan;Roedel, Juergen;
7:1:1:3     Monoclinic crystal structure of polycrystalline Na0.5Bi0.5TiO3
DOI:10.1063/1.3573826  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:85  AU: Aksel, Elena;Forrester, Jennifer S.;Jones, Jacob L.;Thomas, Pam A.;Page, Katharine;Suchomel, Matthew R.;
7:1:1:4     Domain structure-dielectric property relationship in lead-free (1-x)(Bi1/2Na1/2)TiO3-xBaTiO(3) ceramics
DOI:10.1063/1.3514093  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:87  AU: Ma, C.;Tan, X.;Dul'kin, E.;Roth, M.;
7:1:1:5     Structural complexity of (Na0.5Bi0.5)TiO3-BaTiO3 as revealed by Raman spectroscopy
DOI:10.1103/PhysRevB.82.104112  JN:PHYSICAL REVIEW B  PY:2010
  TC:63  AU: Wylie-van Eerd, Ben;Damjanovic, Dragan;Klein, Naama;Setter, Nava;Trodahl, Joe;
7:1:1:6     In Situ Transmission Electron Microscopy of Electric Field-Triggered Reversible Domain Formation in Bi-Based Lead-Free Piezoceramics
DOI:10.1111/j.1551-2916.2010.03778.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:81  AU: Kling, Jens;Tan, Xiaoli;Jo, Wook;Kleebe, Hans-Joachim;Fuess, Hartmut;Roedel, Juergen;
7:1:1:7     Temperature-Insensitive Large Strain of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-(K0.5Na0.5)NbO3 Lead-Free Piezoceramics
DOI:10.1111/j.1551-2916.2009.03573.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:81  AU: Seifert, Klaus T. P.;Jo, Wook;Roedel, Juergen;
7:1:1:8     Lone-Pair-Induced Covalency as the Cause of Temperature- and Field-Induced Instabilities in Bismuth Sodium Titanate
DOI:10.1002/adfm.201102758  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:59  AU: Schuetz, Denis;Deluca, Marco;Krauss, Werner;Feteira, Antonio;Jackson, Tim;Reichmann, Klaus;
7:1:1:9     Creation and Destruction of Morphotropic Phase Boundaries through Electrical Poling: A Case Study of Lead-Free (Bi1/2Na1/2)TiO3-BaTiO3 Piezoelectrics
DOI:10.1103/PhysRevLett.109.107602  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:48  AU: Ma, Cheng;Guo, Hanzheng;Beckman, Scott P.;Tan, Xiaoli;
7:1:1:10     Electric-field-induced phase-change behavior in (Bi0.5Na0.5)TiO3-BaTiO3-(K0.5Na0.5)NbO3: A combinatorial investigation
DOI:10.1016/j.actamat.2009.11.052  JN:ACTA MATERIALIA  PY:2010
  TC:73  AU: Daniels, John E.;Jo, Wook;Roedel, Juergen;Honkimaeki, Veijo;Jones, Jacob L.;
7:1:1:11     Temperature-Dependent Properties of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-SrTiO3 Lead-Free Piezoceramics
DOI:10.1111/j.1551-2916.2012.05162.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:64  AU: Wang, Ke;Hussain, Ali;Jo, Wook;Roedel, Juergen;
7:1:1:12     Determination of depolarization temperature of (Bi1/2Na1/2)TiO3-based lead-free piezoceramics
DOI:10.1063/1.3660253  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:61  AU: Anton, Eva-Maria;Jo, Wook;Damjanovic, Dragan;Roedel, Juergen;
7:1:1:13     Structure and properties of Fe-modified Na0.5Bi0.5TiO3 at ambient and elevated temperature
DOI:10.1103/PhysRevB.85.024121  JN:PHYSICAL REVIEW B  PY:2012
  TC:35  AU: Aksel, Elena;Forrester, Jennifer S.;Kowalski, Benjamin;Deluca, Marco;Damjanovic, Dragan;Jones, Jacob L.;
7:1:1:14     Electric-field-induced volume change and room temperature phase stability of (Bi1/2Na1/2)TiO3-x mol. % BaTiO3 piezoceramics
DOI:10.1063/1.3615675  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:42  AU: Jo, Wook;Roedel, Juergen;
7:1:1:15     Dielectric relaxation, lattice dynamics and polarization mechanisms in Bi0.5Na0.5TiO3-based lead-free ceramics
DOI:10.1063/1.4812383  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:21  AU: Viola, Giuseppe;Ning, Huanpo;Wei, Xiaojong;Deluca, Marco;Adomkevicius, Arturas;Khaliq, Jibran;Reece, Michael John;Yan, Haixue;
7:1:1:16     Phase transitions and phase diagram of the ferroelectric perovskite (Na0.5Bi0.5)(1-x)BaxTiO3 by anelastic and dielectric measurements
DOI:10.1103/PhysRevB.81.144124  JN:PHYSICAL REVIEW B  PY:2010
  TC:52  AU: Cordero, F.;Craciun, F.;Trequattrini, F.;Mercadelli, E.;Galassi, C.;
7:1:1:17     Influence of electric fields on the depolarization temperature of Mn-doped (1-x)Bi1/2Na1/2TiO3-xBaTiO(3)
DOI:10.1063/1.3674275  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:36  AU: Sapper, Eva;Schaab, Silke;Jo, Wook;Granzow, Torsten;Roedel, Juergen;
7:1:1:18     Large Strain Response in the Ternary Bi0.5Na0.5TiO3-BaTiO3-SrTiO3 Solid Solutions
DOI:10.1111/j.1551-2916.2012.05119.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:46  AU: Wang, Feifei;Xu, Min;Tang, Yanxue;Wang, Tao;Shi, Wangzhou;Leung, Chung Ming;
7:1:1:19     Electric-field-induced strain mechanisms in lead-free 94%(Bi1/2Na1/2)TiO3-6%BaTiO3
DOI:10.1063/1.3557049  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:40  AU: Simons, Hugh;Daniels, John;Jo, Wook;Dittmer, Robert;Studer, Andrew;Avdeev, Maxim;Roedel, Juergen;Hoffman, Mark;
7:1:1:20     Nanoscale Insight Into Lead-Free BNT-BT-xKNN
DOI:10.1002/adfm.201200592  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:43  AU: Dittmer, Robert;Jo, Wook;Roedel, Juergen;Kalinin, Sergei;Balke, Nina;
7:1:1:21     Relaxor Characteristics of Morphotropic Phase Boundary (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 Modified with Bi(Zn1/2Ti1/2)O3
DOI:10.1111/j.1551-2916.2011.04631.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:42  AU: Dittmer, Robert;Jo, Wook;Daniels, John;Schaab, Silke;Roedel, Juergen;
7:1:1:22     Evolution of domain structures in Na1/2Bi1/2TiO3 single crystals with BaTiO3
DOI:10.1103/PhysRevB.83.054107  JN:PHYSICAL REVIEW B  PY:2011
  TC:35  AU: Yao, Jianjun;Yan, Li;Ge, Wenwei;Luo, Liang;Li, Jiefang;Viehland, D.;Zhang, Qinhui;Luo, Haosu;
7:1:1:23     In situ Transmission Electron Microscopy Study on the Phase Transitions in Lead-Free (1-x)(Bi1/2Na1/2)TiO3-xBaTiO(3) Ceramics
DOI:10.1111/j.1551-2916.2011.04670.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:45  AU: Ma, C.;Tan, X.;
7:1:1:24     Two-stage processes of electrically induced-ferroelectric to relaxor transition in 0.94(Bi1/2Na1/2)TiO3-0.06BaTiO(3)
DOI:10.1063/1.4805360  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:30  AU: Jo, Wook;Daniels, John;Damjanovic, Dragan;Kleemann, Wolfgang;Roedel, Juergen;
7:1:1:25     Giant strain in Nb-doped Bi-0.5(Na0.82K0.18)(0.5)TiO3 lead-free electromechanical ceramics
DOI:10.1016/j.matlet.2010.07.048  JN:MATERIALS LETTERS  PY:2010
  TC:66  AU: Pham, Ky-Nam;Hussain, Ali;Ahn, Chang Won;Kim, Ill Won;Jeong, Soon Jong;Lee, Jae-Shin;
7:1:1:26     Role of coexisting tetragonal regions in the rhombohedral phase of Na0.5Bi0.5TiO3-xat.%BaTiO3 crystals on enhanced piezoelectric properties on approaching the morphotropic phase boundary
DOI:10.1063/1.3673832  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:22  AU: Yao, Jianjun;Monsegue, Niven;Murayama, Mitsuhiro;Leng, Weinan;Reynolds, William T.;Zhang, Qinhui;Luo, Haosu;Li, Jiefang;Ge, Wenwei;Viehland, D.;
7:1:1:27     Switching of morphotropic phase boundary and large strain response in lead-free ternary (Bi0.5Na0.5)TiO3-(K0.5Bi0.5)TiO3-(K0.5Na0.5)NbO3 system
DOI:10.1063/1.4795511  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:21  AU: Hao, Jigong;Shen, Bo;Zhai, Jiwei;Liu, Chunze;Li, Xiaolong;Gao, Xingyu;
7:1:1:28     Nano- and Mesoscale Structure of Na1/2Bi1/2TiO3: A TEM Perspective
DOI:10.1002/adfm.201200282  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:51  AU: Levin, Igor;Reaney, Ian M.;
7:1:1:29     Large Electric Field-Induced Strain and Antiferroelectric Behavior in (1-x)(Na0.5Bi0.5)TiO3-xBaTiO(3) Ceramics
DOI:10.1021/cm102719k  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:48  AU: Guo, Yiping;Liu, Yun;Withers, Ray L.;Brink, Frank;Chen, Hua;
7:1:1:30     Piezoelectric and Ferroelectric Properties of Li-Doped (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2009.03535.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:40  AU: Dai, Ye-Jing;Zhang, Shujun;Shrout, Thomas R.;Zhang, Xiao-Wen;
7:1:1:31     Lead-free piezoelectric system (Na0.5Bi0.5)TiO3-BaTiO3: Equilibrium structures and irreversible structural transformations driven by electric field and mechanical impact
DOI:10.1103/PhysRevB.88.014103  JN:PHYSICAL REVIEW B  PY:2013
  TC:10  AU: Garg, Rohini;Rao, Badari Narayana;Senyshyn, Anatoliy;Krishna, P. S. R.;Ranjan, Rajeev;
7:1:1:32     A New Phase Boundary in (Bi1/2Na1/2)TiO3-BaTiO3 Revealed via a Novel Method of Electron Diffraction Analysis
DOI:10.1002/adfm.201300640  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:26  AU: Ma, Cheng;Guo, Hanzheng;Tan, Xiaoli;
7:1:1:33     Composition-induced antiferroelectric phase and giant strain in lead-free (Na-y,Bi-z)Ti1-xO3(1-x)-xBaTiO(3) ceramics
DOI:10.1103/PhysRevB.83.054118  JN:PHYSICAL REVIEW B  PY:2011
  TC:35  AU: Guo, Yiping;Gu, Mingyuan;Luo, Haosu;Liu, Yun;Withers, Ray L.;
7:1:1:34     Strain enhancement in Bi-1/2(Na0.82K0.18)(1/2)TiO3 lead-free electromechanical ceramics by co-doping with Li and Ta
DOI:10.1016/j.jallcom.2011.09.043  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:36  AU: Nguyen, Van-Quyet;Han, Hyoung-Su;Kim, Kyung-Jong;Dang, Duc-Dung;Ahn, Kyoung-Kwan;Lee, Jae-Shin;
7:1:1:35     Phase transition sequence in sodium bismuth titanate observed using high-resolution x-ray diffraction
DOI:10.1063/1.3664393  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:27  AU: Aksel, Elena;Forrester, Jennifer S.;Kowalski, Benjamin;Jones, Jacob L.;Thomas, Pam A.;
7:1:1:36     Origin of large recoverable strain in 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO(3) near the ferroelectric-relaxor transition
DOI:10.1063/1.4790285  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:10  AU: Simons, Hugh;Daniels, John E.;Glaum, Julia;Studer, Andrew J.;Jones, Jacob L.;Hoffman, Mark;
7:1:1:37     Origin of high piezoelectric response in A-site disordered morphotropic phase boundary composition of lead-free piezoelectric 0.93(Na0.5Bi0.5)TiO3-0.07BaTiO(3)
DOI:10.1063/1.4792729  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:15  AU: Maurya, Deepam;Murayama, M.;Pramanick, A.;Reynolds, W. T., Jr.;An, Ke;Priya, Shashank;
7:1:1:38     Structural investigations on lead-free Bi1/2Na1/2TiO3-based piezoceramics
DOI:10.1007/s10853-011-5427-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:35  AU: Schmitt, L. A.;Kling, J.;Hinterstein, M.;Hoelzel, M.;Jo, Wook;Kleebe, H. -J.;Fuess, H.;
7:1:1:39     Enhanced electric field-induced strain and ferroelectric behavior of (Bi0.5Na0.5)TiO3-BaTiO3-SrZrO3 lead-free ceramics
DOI:10.1016/j.ceramint.2014.04.026  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:8  AU: Maqbool, Adnan;Hussain, Ali;Rahman, Jamil Ur;Song, Tae Kwon;Kim, Won-Jeong;Lee, Jehyun;Kim, Myong-Ho;
7:1:1:40     The Composition and Temperature-Dependent Structure Evolution and Large Strain Response in (1-x)(Bi0.5Na0.5)TiO3-xBa(Al0.5Ta0.5)O3 Ceramics
DOI:10.1111/jace.12039  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:16  AU: Bai, Wangfeng;Bian, Yanlong;Hao, Jigong;Shen, Bo;Zhai, Jiwei;
7:1:1:41     Effect of Ferroelectric Long-Range Order on the Unipolar and Bipolar Electric Fatigue in Bi1/2Na1/2TiO3-Based Lead-Free Piezoceramics
DOI:10.1111/j.1551-2916.2011.04605.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:19  AU: Luo, Zhenhua;Granzow, Torsten;Glaum, Julia;Jo, Wook;Roedel, Juergen;Hoffman, Mark;
7:1:1:42     Hierarchical domains in Na1/2Bi1/2TiO3 single crystals: Ferroelectric phase transformations within the geometrical restrictions of a ferroelastic inheritance
DOI:10.1063/1.3443717  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:27  AU: Yao, Jianjun;Ge, Wenwei;Luo, Liang;Li, Jiefang;Viehland, D.;Luo, Haosu;
7:1:1:43     Electric-field-induced and spontaneous relaxor-ferroelectric phase transitions in (Na1/2Bi1/2)(1-x)BaxTiO3
DOI:10.1063/1.4770326  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Craciun, F.;Galassi, C.;Birjega, R.;
7:1:1:44     Domain fragmentation during cyclic fatigue in 94%(Bi1/2Na1/2)TiO3-6%BaTiO3
DOI:10.1063/1.4745900  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Simons, Hugh;Glaum, Julia;Daniels, John E.;Studer, Andrew J.;Liess, Andreas;Roedel, Juergen;Hoffman, Mark;
7:1:1:45     The influence of Mn substitution on the local structure of Na0.5Bi0.5TiO3 crystals: Increased ferroelectric ordering and coexisting octahedral tilts
DOI:10.1063/1.3699010  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Yao, Jianjun;Ge, Wenwei;Yan, Li;Reynolds, William T.;Li, Jiefang;Viehland, D.;Kiselev, D. A.;Kholkin, A. L.;Zhang, Qinhui;Luo, Haosu;
7:1:1:46     Giant strain response and structure evolution in (Bi0.5Na0.5)(0.945-x)(Bi0.2Sr0.7 square(0.1))(x)Ba0.055TiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2014.05.032  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Shi, Jing;Fan, Huiqing;Liu, Xiao;Li, Qiang;
7:1:1:47     Phase transitions, relaxor behavior, and large strain response in LiNbO3-modified Bi-0.5(Na0.80K0.20)(0.5)TiO3 lead-free piezoceramics
DOI:10.1063/1.4816047  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Hao, Jigong;Bai, Wangfeng;Li, Wei;Shen, Bo;Zhai, Jiwei;
7:1:1:48     Bifurcated Polarization Rotation in Bismuth-Based Piezoelectrics
DOI:10.1002/adfm.201201564  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:33  AU: Keeble, Dean S.;Barney, Emma R.;Keen, David A.;Tucker, Matthew G.;Kreisel, Jens;Thomas, Pam A.;
7:1:1:49     Enhanced piezoelectricity and nature of electric-field induced structural phase transformation in textured lead-free piezoelectric Na0.5Bi0.5TiO3-BaTiO3 ceramics
DOI:10.1063/1.4709404  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Maurya, Deepam;Pramanick, Abhijit;An, Ke;Priya, Shashank;
7:1:1:50     Tailoring the Piezoelectric and Relaxor Properties of (Bi1/2Na1/2)TiO3-BaTiO3 via Zirconium Doping
DOI:10.1111/jace.12405  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:9  AU: Glaum, Julia;Simons, Hugh;Acosta, Matias;Hoffman, Mark;
7:1:1:51     Tailoring Strain Properties of (0.94-x)Bi1/2Na1/2TiO3-0.06BaTiO(3)-xK(0.5)Na(0.5)NbO(3) Ferroelectric/Relaxor Composites
DOI:10.1111/jace.12783  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Groh, Claudia;Jo, Wook;Roedel, Juergen;
7:1:1:52     Large Electrostrictive Strain in ( Bi0.5Na0.5) TiO3-BaTiO3-( Sr0.7Bi0.2) TiO3 Solid Solutions
DOI:10.1111/jace.12712  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Shi, Jing;Fan, Huiqing;Liu, Xiao;Bell, Andrew J.;
7:1:1:53     Electric-field-induced phase switching in the lead free piezoelectric potassium sodium bismuth titanate
DOI:10.1063/1.3490235  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:32  AU: Royles, A. J.;Bell, A. J.;Jephcoat, A. P.;Kleppe, A. K.;Milne, S. J.;Comyn, T. P.;
7:1:1:54     Temperature- and Frequency-Dependent Properties of the 0.75Bi1/2Na1/2TiO3-0.25SrTiO3 Lead-Free Incipient Piezoceramic
DOI:10.1111/jace.12884  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Acosta, Matias;Jo, Wook;Roedel, Juergen;
7:1:1:55     Relaxor to Ferroelectric Transitions in (Bi1/2Na1/2)TiO3-Bi(Zn1/2Ti1/2)O-3 Solid Solutions
DOI:10.1111/j.1551-2916.2012.05320.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Patterson, Eric A.;Cann, David P.;
7:1:1:56     Anisotropy of ferroelectric behavior of (1-x)Bi1/2Na1/2TiO3-xBaTiO(3) single crystals across the morphotropic phase boundary
DOI:10.1063/1.4891529  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Schneider, D.;Jo, Wook;Roedel, J.;Rytz, D.;Granzow, T.;
7:1:1:57     Investigation of the depolarisation transition in Bi-based relaxor ferroelectrics
DOI:10.1063/1.4869132  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Woodward, David I.;Dittmer, Robert;Jo, Wook;Walker, David;Keeble, Dean S.;Dale, Matthew W.;Roedel, Juergen;Thomas, Pam A.;
7:1:1:58     Piezoelectric properties and phase transition temperatures of the solid solution of (1-x)(Bi0.5Na0.5)TiO3-xSrTiO(3)
DOI:10.1016/j.jeurceramsoc.2010.02.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:44  AU: Krauss, Werner;Schuetz, Denis;Mautner, Franz Andreas;Feteira, Antonio;Reichmann, Klaus;
7:1:1:59     Effect of poling on nanodomains and nanoscale structure in A-site disordered lead-free piezoelectric Na0.5Bi0.5TiO3-BaTiO3
DOI:10.1039/c4tc01124d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:3  AU: Maurya, Deepam;Pramanick, Abhijit;Feygenson, Mikhail;Neuefeind, Joerg C.;Bodnar, Robert J.;Priya, Shashank;
7:1:1:60     Effect of BiMeO3 on the Phase Structure, Ferroelectric Stability, and Properties of Lead-Free Bi0.5(Na0.80K0.20)0.5TiO3 Ceramics
DOI:10.1111/jace.12820  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Hao, Jigong;Shen, Bo;Zhai, Jiwei;Chen, Haydn;
7:1:1:61     Large strains accompanying field-induced ergodic phase-polar ordered phase transformations in Bi(Mg0.5Ti0.5)O-3-PbTiO3-(Bi0.5Na0.5)TiO3 ternary system
DOI:10.1016/j.jeurceramsoc.2014.01.040  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:7  AU: Zhao, Wanli;Zuo, Ruzhong;Fu, Jian;Shi, Min;
7:1:1:62     Effect of Nb-donor and Fe-acceptor dopants in (Bi1/2Na1/2)TiO3-BaTiO3-(K0.5Na0.5)NbO3 lead-free piezoceramics
DOI:10.1063/1.3437645  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:21  AU: Jo, Wook;Erdem, Emre;Eichel, Ruediger-A.;Glaum, Julia;Granzow, Torsten;Damjanovic, Dragan;Roedel, Juergen;
7:1:1:63     Electric-field-driven monoclinic-to-rhombohedral transformation in Na1/2Bi1/2TiO3
DOI:10.1103/PhysRevB.86.134103  JN:PHYSICAL REVIEW B  PY:2012
  TC:12  AU: Rao, Badari Narayana;Ranjan, Rajeev;
7:1:1:64     Atomistic origin of huge response functions at the morphotropic phase boundary of (1-x)Na0.5Bi0.5TiO3-xBaTiO(3)
DOI:10.1103/PhysRevB.90.064112  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Datta, K.;Richter, A.;Goebbels, M.;Neder, R. B.;Mihailova, B.;
7:1:1:65     Structural origins of relaxor behavior in a 0.96(Bi1/2Na1/2)TiO3-0.04BaTiO(3) single crystal under electric field
DOI:10.1063/1.3602316  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:21  AU: Daniels, John E.;Jo, Wook;Roedel, Juergen;Rytz, Daniel;Donner, Wolfgang;
7:1:1:66     Phase transitional behavior and electric field-induced large strain in alkali niobate-modified Bi-0.5(Na0.80K0.20)(0.5)TiO3 lead-free piezoceramics
DOI:10.1063/1.4862187  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:7  AU: Hao, Jigong;Shen, Bo;Zhai, Jiwei;Chen, Haydn;
7:1:1:67     Phase transitions, relaxor behavior, and electrical properties in (1-x)(Bi0.5Na0.5)TiO3-x(K0.5Na0.5)NbO3 lead-free piezoceramics
DOI:10.1557/jmr.2012.328  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:9  AU: Hao, Jigong;Bai, Wangfeng;Li, Wei;Shen, Bo;Zhai, Jiwei;
7:1:1:68     Bipolar and Unipolar Fatigue of Ferroelectric BNT-Based Lead-Free Piezoceramics
DOI:10.1111/j.1551-2916.2010.04101.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:23  AU: Luo, Zhenhua;Glaum, Julia;Granzow, Torsten;Jo, Wook;Dittmer, Robert;Hoffman, Mark;Roedel, Juergen;
7:1:1:69     Electric-field-induced polarization and strain in 0.94(Bi1/2Na1/2)TiO3-0.06BaTiO(3) under uniaxial stress
DOI:10.1016/j.actamat.2012.11.012  JN:ACTA MATERIALIA  PY:2013
  TC:16  AU: Dittmer, Robert;Webber, Kyle G.;Aulbach, Emil;Jo, Wook;Tan, Xiaoli;Roedel, Juergen;
7:1:1:70     Electrical poling below coercive field for large piezoelectricity
DOI:10.1063/1.4794866  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:12  AU: Guo, Hanzheng;Ma, Cheng;Liu, Xiaoming;Tan, Xiaoli;
7:1:1:71     Piezoelectric and ferroelectric properties of (Bi1-xNa0.8K0.2Lax)(0.5)TiO3 lead-free ceramics
DOI:10.1016/j.jallcom.2012.02.114  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:16  AU: Wang, Baoyin;Luo, Laihui;Ni, Feng;Du, Peng;Li, Weiping;Chen, Hongbing;
7:1:1:72     Ultrahigh electromechanical response in (1-x)(Na0.5Bi0.5)TiO3-xBaTiO(3) single-crystals via polarization extension
DOI:10.1063/1.4709619  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:16  AU: Ge, Wenwei;Luo, Chengtao;Zhang, Qinhui;Devreugd, Chris P.;Ren, Yang;Li, Jiefang;Luo, Haosu;Viehland, D.;
7:1:1:73     Electric-field-temperature phase diagram of the ferroelectric relaxor system (1-x)Bi1/2Na1/2TiO3-xBaTiO(3) doped with manganese
DOI:10.1063/1.4876746  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Sapper, Eva;Novak, Nikola;Jo, Wook;Granzow, Torsten;Roedel, Juergen;
7:1:1:74     Thermally-induced loss of piezoelectricity in ferroelectric Na0.5Bi0.5TiO3-BaTiO3
DOI:10.1016/j.matlet.2013.10.041  JN:MATERIALS LETTERS  PY:2014
  TC:8  AU: Foronda, Humberto;Deluca, Marco;Aksel, Elena;Forrester, Jennifer S.;Jones, Jacob L.;
7:1:1:75     Electromechanical strain in Bi(Zn1/2Ti1/2)O-3-(Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 solid solutions
DOI:10.1063/1.4714346  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:21  AU: Patterson, Eric A.;Cann, David P.;Pokorny, Jan;Reaney, Ian M.;
7:1:1:76     Effects of Na nonstoichiometry in (Bi0.5Na0.5+x)TiO3 ceramics
DOI:10.1063/1.3275704  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:34  AU: Sung, Y. S.;Kim, J. M.;Cho, J. H.;Song, T. K.;Kim, M. H.;Chong, H. H.;Park, T. G.;Do, D.;Kim, S. S.;
7:1:1:77     Bipolar piezoelectric fatigue of Bi(Zn0.5Ti0.5)O-3-(Bi0.5K0.5)TiO3-(Bi0.5Na0.5)TiO3 Pb-free ceramics
DOI:10.1063/1.4738770  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Patterson, Eric A.;Cann, David P.;
7:1:1:78     Temperature dependent switching mechanism of (Pb0.92La0.08)(Zr0.65Ti0.35)O-3 investigated by small and large signal measurements
DOI:10.1063/1.3493191  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:19  AU: Schaab, Silke;Granzow, Torsten;
7:1:1:79     Antiferroelectric Phase and Pyroelectric Response in (NayBiz)Ti1-xO3(1-x)-xBaTiO(3) Ceramics
DOI:10.1111/j.1551-2916.2011.04509.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:21  AU: Guo, Yiping;Gu, Mingyuan;Luo, Haosu;
7:1:1:80     Macroscopic and Nanoscopic Polarization Relaxation Kinetics in Lead-Free Relaxors Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3-BiZn1/2Ti1/2O3
DOI:10.1111/jace.13227  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Gobeljic, Danka;Dittmer, Robert;Roedel, Juergen;Shvartsman, Vladimir V.;Lupascu, Doru C.;
7:1:1:81     Theoretical and experimental investigation of Raman modes, ferroelectric nd dielectric properties of relaxor Na0.5Bi0.5TiO3
DOI:10.1063/1.4804940  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:13  AU: Niranjan, Manish K.;Karthik, T.;Asthana, Saket;Pan, Jaysree;Waghmare, Umesh V.;
7:1:1:82     Relaxor/Ferroelectric Composites: A Solution in the Quest for Practically Viable Lead-Free Incipient Piezoceramics
DOI:10.1002/adfm.201302102  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:20  AU: Groh, Claudia;Franzbach, Daniel J.;Jo, Wook;Webber, Kyle G.;Kling, Jens;Schmitt, Ljubomira A.;Kleebe, Hans-Joachim;Jeong, Soon-Jong;Lee, Jae-Shin;Roedel, Juergen;
7:1:1:83     Phase Transition, Electrical Properties, and Temperature-Insensitive Large Strain in BiAlO3-Modified Bi-0.5(Na0.75K0.25)(0.5)TiO3 Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2011.04595.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:29  AU: Ullah, Aman;Ahn, Chang Won;Hussain, Ali;Lee, Sun Young;Kim, Ill Won;
7:1:1:84     Piezoelectric and dielectric properties of Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-Ba0.77Ca0.23TiO3 lead-free piezoelectric ceramics
DOI:10.1007/s10853-011-6177-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:8  AU: Ni, Feng;Luo, Laihui;Pan, Xiaoyin;Zhang, Yuepin;Chen, Hongbing;
7:1:1:85     Role of point defects in bipolar fatigue behavior of Bi(Mg1/2Ti1/2)O-3 modified (Bi1/2K1/2)TiO3-(Bi1/2Na1/2)TiO3 relaxor ceramics
DOI:10.1063/1.4871671  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Kumar, Nitish;Ansell, Troy Y.;Cann, David P.;
7:1:1:86     Effects of A-site vacancy on the electrical properties in lead-free non-stoichiometric ceramics Bi0.5+x(Na0.82K0.18)(0.5-3x)TiO3 and Bi0.5+y(Na0.82K0.18)(0.5)TiO3
DOI:10.1016/j.jallcom.2012.06.129  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Ni, Feng;Luo, Laihui;Pan, Xiaoyin;Li, Weiping;Zhu, Jian-qi;
7:1:1:87     Ferroelectric-ferroelectric phase coexistence in Na1/2Bi1/2TiO3
DOI:10.1103/PhysRevB.87.060102  JN:PHYSICAL REVIEW B  PY:2013
  TC:9  AU: Rao, Badari Narayana;Fitch, Andy N.;Ranjan, Rajeev;
7:1:1:88     Alternating and direct current field effects on the structure-property relationships in Na0.5Bi0.5TiO3-x% BaTiO3 textured ceramics
DOI:10.1063/1.4809940  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Ge, Wenwei;Maurya, Deepam;Li, Jiefang;Priya, Shashank;Viehland, D.;
7:1:1:89     Origin of high piezoelectric activity in perovskite ferroelectric ceramics
DOI:10.1063/1.4884640  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zeng, Weidong;Zhou, Xiujuan;Chen, Jun;Liao, Jiayi;Zhou, Changrong;Cen, Zhenyong;Yang, Tao;Yang, Huabin;Zhou, Qin;Chen, Guohua;Yuan, Changlai;
7:1:1:90     Structural properties of (Bi0.5Na0.5)(1-x)BaxTiO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2010.07.042  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:35  AU: Picht, Gunnar;Toepfer, Joerg;Hennig, Eberhard;
7:1:1:91     Stabilization of the Fatigue-Resistant Phase by CuO Addition in (Bi1/2Na1/2)TiO3-BaTiO3
DOI:10.1111/j.1551-2916.2010.04379.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Ehmke, Matthias;Glaum, Julia;Jo, Wook;Granzow, Torsten;Roedel, Juergen;
7:1:1:92     Preparation and electrical properties of Bi0.5Na0.5TiO3-BaTiO3-KNbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.12.190  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:24  AU: Ni, Haimin;Luo, Laihui;Li, Weiping;Zhu, Yuejin;Luo, Haosu;
7:1:1:93     The enhanced piezoelectric performance of Bi1/2Na1/2TiO3-BaTiO3 ceramics by Ba0.77Ca0.23TiO3 substitution
DOI:10.1016/j.jallcom.2012.05.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:9  AU: Luo, Laihui;Ni, Feng;Zhang, Huixin;Chen, Hongbing;
7:1:1:94     Enhanced High-Temperature Piezoelectric Coefficients and Thermal Stability of Fe- and Mn-Substituted Na0.5Bi0.5TiO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04441.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:18  AU: Davies, Matthew;Aksel, Elena;Jones, Jacob L.;
7:1:1:95     Long ranged structural modulation in the pre-morphotropic phase boundary cubic-like state of the lead-free piezoelectric Na1/2Bi1/2TiO3-BaTiO3
DOI:10.1063/1.4842855  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Garg, Rohini;Rao, Badari Narayana;Senyshyn, Anatoliy;Ranjan, Rajeev;
7:1:1:96     Structural diversity of the (Na1-xKx)(0.5)Bi0.5TiO3 perovskite at the morphotropic phase boundary
DOI:10.1063/1.4773831  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Otonicar, Mojca;Skapin, Sreco D.;Jancar, Bostjan;Suvorov, Danilo;
7:1:1:97     Structural stability and depolarization of manganese-doped (Bi0.5Na0.5)(1-x)BaxTiO3 relaxor ferroelectrics
DOI:10.1063/1.4898322  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Wang, Sheng-Fen;Tu, Chi-Shun;Chang, Ting-Lun;Chen, Pin-Yi;Chen, Cheng-Sao;Schmidt, V. Hugo;Anthoniappen, J.;
7:1:1:98     Structure and temperature-dependent phase transitions of lead-free Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3-K0.5Na0.5NbO3 piezoceramics
DOI:10.1557/jmr.2012.195  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:5  AU: Anton, Eva-Maria;Schmitt, Ljubomira Ana;Hinterstein, Manuel;Trodahl, Joe;Kowalski, Ben;Jo, Wook;Kleebe, Hans-Joachim;Roedel, Juergen;Jones, Jacob L.;
7:1:1:99     Large Strain Response in < 001 > Textured 0.79BNT-0.20BKT-0.01NKN Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2012.05353.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:13  AU: Ye, Chenggen;Hao, Jigong;Shen, Bo;Zhai, Jiwei;
7:1:1:100     Large Electromechanical Strain in Lead-Free Binary System K0.5Bi0.5TiO3-Bi(Mg0.5Ti0.5)O-3
DOI:10.1111/jace.13110  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Zeb, Aurang;Milne, Steven J.;
7:1:1:101     Structural, electrical, and strain properties of stoichiometric 1-x-y(Bi0.5Na0.5) TiO3-x(Bi0.5K0.5TiO3)-y(Na0.5K0.5)NbO3 solid solutions
DOI:10.1063/1.3536634  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:21  AU: Singh, Amrita;Chatterjee, Ratnamala;
7:1:1:102     Electric-field-induced phase transition and large strain in lead-free Nb-doped BNKT-BST ceramics
DOI:10.1016/j.jeurceramsoc.2013.07.014  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:21  AU: Ullah, Arnir;Malik, Rizwan Ahmed;Ullah, Aman;Lee, Dae Su;Jeong, Soon Jong;Lee, Jae Shin;Kim, Ill Won;Ahn, Chang Won;
7:1:1:103     The temperature-dependent electrical properties of Bi0.5Na0.5TiO3-BaTiO3-Bi0.5K0.5TiO3 near the morphotropic phase boundary
DOI:10.1016/j.actamat.2011.10.010  JN:ACTA MATERIALIA  PY:2012
  TC:29  AU: Zhang, Shan-Tao;Yang, Bin;Cao, Wenwu;
7:1:1:104     notRoles of lattice distortion in (1-x)(Bi0.5Na0.5)TiO3-xBaTiO(3) ceramics
DOI:10.1063/1.3428580  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:24  AU: Sung, Y. S.;Kim, J. M.;Cho, J. H.;Song, T. K.;Kim, M. H.;Park, T. G.;
7:1:1:105     Influence of Mn Doping on the Structure and Properties of Na0.5Bi0.5TiO3 Single Crystals
DOI:10.1111/j.1551-2916.2009.03551.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:21  AU: Ge, Wenwei;Li, Jiefang;Viehland, Dwight;Luo, Haosu;
7:1:1:106     Anomalous phase transitions of lead-free piezoelectric xNa(0.5)Bi(0.5)TiO(3)-(1-x)BaTiO3 solid solutions with enhanced phase transition temperatures
DOI:10.1103/PhysRevB.82.224105  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Datta, K.;Thomas, P. A.;Roleder, K.;
7:1:1:107     Symmetry and defects in rhombohedral single-crystalline Na0.5Bi0.5TiO3
DOI:10.1103/PhysRevB.89.174102  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Beanland, Richard;Thomas, Pam A.;
7:1:1:108     Inherent optical behavior and structural variation in Na0.5Bi0.5TiO3-6% BaTiO3 revealed by temperature dependent Raman scattering and ultraviolet-visible transmittance
DOI:10.1063/1.4869309  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Huang, T.;Hu, Z. G.;Xu, G. S.;Zhang, X. L.;Zhang, J. Z.;Chu, J. H.;
7:1:1:109     The effect of composite (Li0.5Nd0.5)(2+) ions substitution on microstructure, dielectric behavior and electrical properties of 0.95Bi(0.5)Na(0.5)TiO(3)-0.05BaTiO(3) ceramics
DOI:10.1016/j.ceramint.2014.03.014  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Cen, Zhenyong;Zhou, Changrong;Zhou, Qin;Yang, Huabin;Zhou, Xiujuan;Cheng, Jun;Ye, Xinglang;
7:1:1:110     Phase Diagrams and Electromechanical Strains in Lead-Free BNT-Based Ternary Perovskite Compounds
DOI:10.1111/jace.13077  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Bai, Wangfeng;Li, Lingyu;Li, Wei;Shen, Bo;Zhai, Jiwei;Chen, Haydn;
7:1:1:111     Morphotropic Phase Boundary in Solution- Derived ( Bi0.5Na0.5) 1-xBaxTiO3 Thin Films: Part I Crystalline Structure and Compositional Depth Profile
DOI:10.1111/jace.12753  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Perez-Mezcua, Dulce;Sirera, Rafael;Bretos, Inigo;Ricote, Jesus;Jimenez, Ricardo;Fuentes-Cobas, Luis;Escobar-Galindo, Ramon;Chateigner, Daniel;Lourdes Calzada, M.;
7:1:1:112     Frequency-dependence of large-signal properties in lead-free piezoceramics
DOI:10.1063/1.4730600  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Dittmer, Robert;Jo, Wook;Aulbach, Emil;Granzow, Torsten;Roedel, Juergen;
7:1:1:113     Polar nanoregions and dielectric properties in high-strain lead-free 0.93(Bi1/2Na1/2)TiO3-0.07BaTiO(3) piezoelectric single crystals
DOI:10.1063/1.4861030  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Chen, Cheng-Sao;Chen, Pin-Yi;Tu, Chi-Shun;
7:1:1:114     Evolution of structure and electrical properties with lanthanum content in [(Bi1/2Na1/2)(0.95)Ba-0.05](1-x)LaxTiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2014.03.017  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Liu, Xiaoming;Guo, Hanzheng;Tan, Xiaoli;
7:1:1:115     Chemical nature of giant strain in Mn-doped 0.94(Na0.5Bi0.5)TiO3-0.06BaTiO(3) lead-free ferroelectric single crystals
DOI:10.1016/j.scriptamat.2013.11.017  JN:SCRIPTA MATERIALIA  PY:2014
  TC:10  AU: Zhang, Haiwu;Deng, Hao;Chen, Chao;Li, Long;Lin, Di;Li, Xiaobing;Zhao, Xiangyong;Luo, Haosu;Yan, Jun;
7:1:1:116     Phase diagram and electrostrictive properties of Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3 ceramics
DOI:10.1063/1.3491839  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:21  AU: Zhang, Shan-Tao;Yan, Feng;Yang, Bin;Cao, Wenwu;
7:1:1:117     Lead-free ternary perovskite compounds with large electromechanical strains
DOI:10.1063/1.3647627  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Jarupoom, Parkpoom;Patterson, Eric;Gibbons, Brady;Rujijanagul, Gobwute;Yimnirun, Rattikorn;Cann, David;
7:1:1:118     Electric field induced cubic to monoclinic phase transition in multiferroic 0.65Bi(Ni1/2Ti1/2)O-3-0.35PbTiO(3) solid solution
DOI:10.1063/1.4899058  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Pandey, Rishikesh;Singh, Akhilesh Kumar;
7:1:1:119     Structural, dielectric and piezoelectric properties of (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3-Bi(Zn0.5Ti0.5)O-3 thin films prepared by sol-gel method
DOI:10.1016/j.ceramint.2013.12.143  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Li, Wei;Zeng, Huarong;Zhao, Kunyu;Hao, Jigong;Zhai, Jiwei;
7:1:1:120     Effect of SrTiO3 template on electric properties of textured BNT-BKT ceramics prepared by templated grain growth process
DOI:10.1016/j.jallcom.2014.03.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Bai, Wangfeng;Li, Lingyu;Li, Wei;Shen, Bo;Zhai, Jiwei;Chen, Haydn;
7:1:1:121     Large Strain Response in 0.99(Bi0.5Na0.4K0.1)TiO3-0.01(KxNa1-x)NbO3 Lead-Free Ceramics Induced by the Change of K/Na Ratio in (KxNa1-x)NbO3
DOI:10.1111/jace.12462  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Hao, Jigong;Shen, Bo;Zhai, Jiwei;Liu, Chunze;Li, Xiaolong;Gao, Xingyu;
7:1:1:122     Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach
DOI:10.1063/1.4869786  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Khansur, Neamul H.;Groh, Claudia;Jo, Wook;Reinhard, Christina;Kimpton, Justin A.;Webber, Kyle G.;Daniels, John E.;
7:1:1:123     Electromechanical strain and bipolar fatigue in Bi(Mg1/2Ti1/2)O-3-(Bi1/2K1/2)TiO3-(Bi1/2Na1/2)TiO3 ceramics
DOI:10.1063/1.4817524  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Kumar, Nitish;Cann, David P.;
7:1:1:124     Energy-storage properties of (1-x)Bi0.47Na0.47Ba0.06TiO3-xKNbO(3) lead-free ceramics
DOI:10.1016/j.jallcom.2013.09.052  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:9  AU: Wang, Baoyin;Luo, Laihui;Jiang, Xijie;Li, Weiping;Chen, Hongbing;
7:1:1:125     Evidence for the suppression of intermediate anti-ferroelectric ordering and observation of hardening mechanism in Na1/2Bi1/2TiO3 ceramics through cobalt substitution
DOI:10.1063/1.4862169  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Thangavelu, Karthik;Ramadurai, Ranjith;Asthana, Saket;
7:1:1:126     Effect of Mn substituents on the domain and local structures of Na1/2Bi1/2TiO3-BaTiO3 single crystals near a morphotropic phase boundary
DOI:10.1063/1.3573801  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Yao, Jianjun;Yang, Yaodong;Monsegue, Niven;Li, Yanxi;Li, Jiefang;Zhang, Qinhui;Ge, Wenwei;Luo, Haosu;Viehland, D.;
7:1:1:127     Crystallographic direction dependence of direct current field induced strain and phase transitions in Na0.5Bi0.5TiO3-x%BaTiO3 single crystals near the morphotropic phase boundary
DOI:10.1063/1.4757877  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Luo, Chengtao;Ge, Wenwei;Zhang, Qinhui;Li, Jiefang;Luo, Haosu;Viehland, D.;
7:1:1:128     Smearing of induced ferroelectric transition and easy imprinting of different polarization configurations in relaxor ferroelectric (Na1/2Bi1/2)(1-x)BaxTiO3
DOI:10.1063/1.4802951  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Craciun, F.;Galassi, C.;
7:1:1:129     Enhanced ferroelectric properties and thermal stability of nonstoichiometric 0.92(Na0.5Bi0.5)TiO3-0.08(K0.5Bi0.5)TiO3 single crystals
DOI:10.1063/1.4833401  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Zhang, Haiwu;Chen, Chao;Zhao, Xiangyong;Deng, Hao;Li, Long;Lin, Di;Li, Xiaobing;Ren, Bo;Luo, Haosu;Yan, Jun;
7:1:1:130     Electric field and temperature-induced phase transition in Mn-doped Na1/2Bi1/2TiO3-5.0 at.%BaTiO3 single crystals investigated by micro-Raman scattering
DOI:10.1063/1.4870504  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chen, Chao;Zhang, Haiwu;Deng, Hao;Huang, Ting;Li, Xiaobing;Zhao, Xiangyong;Hu, Zhigao;Wang, Dong;Luo, Haosu;
7:1:1:131     Impedance Spectroscopy of (Bi1/2Na1/2)TiO3-BaTiO3 Ceramics Modified with ( K0.5Na0.5)NbO3
DOI:10.1111/jace.12804  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Zang, Jiadong;Li, Ming;Sinclair, Derek C.;Jo, Wook;Roedel, Juergen;
7:1:1:132     Morphotropic Phase Boundary in Solution- Derived ( Bi0.5Na0.5) 1-xBaxTiO3 Thin Films: Part II Functional Properties and Phase Stability
DOI:10.1111/jace.12752  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Perez-Rivero, Armando;Ricote, Jesus;Bretos, Inigo;Calzada, M. L.;de la Cruz, Javier Perez;Fernandes, Jose R. A.;Jimenez, Ricardo;
7:1:1:133     Ergodicity reflected in macroscopic and microscopic field-dependent behavior of BNT-based relaxors
DOI:10.1063/1.4867157  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Dittmer, Robert;Gobeljic, Danka;Jo, Wook;Shvartsman, Vladimir V.;Lupascu, Doru C.;Jones, Jacob L.;Roedel, Juergen;
7:1:1:134     Imaging planar tetragonal sheets in rhombohedral Na0.5Bi0.5TiO3 using transmission electron microscopy
DOI:10.1016/j.scriptamat.2011.05.031  JN:SCRIPTA MATERIALIA  PY:2011
  TC:14  AU: Beanland, R.;Thomas, P. A.;
7:1:1:135     Large Piezoresponse and Ferroelectric Properties of (Bi0.5Na0.5)TiO3-(Bi0.5K0.5) TiO3-Bi(Mg0.5Ti0.5)O-3 Thin Films Prepared by Chemical Solution Deposition
DOI:10.1111/jace.12279  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:9  AU: Jeon, Yu Hong;Patterson, Eric A.;Cann, David P.;Mardilovich, Peter;Stickel, William;Gibbons, Brady J.;
7:1:1:136     Local structure change evidenced by temperature-dependent elastic measurements: Case study on Bi1/2Na1/2TiO3-based lead-free relaxor piezoceramics
DOI:10.1063/1.4866092  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Dittmer, Robert;Jo, Wook;Webber, Kyle G.;Jones, Jacob L.;Roedel, Juergen;
7:1:1:137     Large E-field induced strain and polar evolution in lead-free Zr-doped 92.5%(Bi0.5Na0.5)TiO3-7.5%BaTiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2014.05.044  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Chen, Pin-Yi;Chen, Cheng-Sao;Tu, Chi-Shun;Chang, Ting-Lun;
7:1:1:138     Effect of Texture on Temperature-Dependent Properties of K0.5Na0.5NbO3 Modified Bi1/2Na1/2TiO3-xBaTiO(3)
DOI:10.1111/jace.12986  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Fancher, Chris M.;Jo, Wook;Roedel, Juergen;Blendell, John E.;Bowman, Keith J.;
7:1:1:139     Large Strain Response and Fatigue-Resistant Behavior in Ternary Bi0.5Na0.5TiO3-BaTiO3-Bi(Zn0.5Ti0.5)O-3 Solid Solutions
DOI:10.1111/jace.13176  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Li, Yan;Wang, Feifei;Ye, Xiang;Xie, Yiqun;Tang, Yanxue;Sun, Dazhi;Shi, Wangzhou;Zhao, Xiangyong;Luo, Haosu;
7:1:1:140     Crystal Structure, dielectric and ferroelectric properties of (Bi0.5Na0.5)TiO3-(Ba,Sr)TiO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2009.11.083  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:25  AU: Lee, Wei-Chih;Huang, Chi-Yuen;Tsao, Liang-Kuo;Wu, Yu-Chun;
7:1:1:141     Local atomic structure deviation from average structure of Na0.5Bi0.5TiO3: Combined x-ray and neutron total scattering study
DOI:10.1103/PhysRevB.87.104113  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Aksel, Elena;Forrester, Jennifer S.;Nino, Juan C.;Page, Katharine;Shoemaker, Daniel P.;Jones, Jacob L.;
7:1:1:142     Piezoelectric properties of tetragonal single-domain Mn-doped NBT-6 %BT single crystals
DOI:10.1007/s00339-013-8098-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:3  AU: Guennou, Mael;Savinov, Maxim;Drahokoupil, Jan;Luo, Haosu;Hlinka, Jirka;
7:1:1:143     Direct evidence of correlations between relaxor behavior and polar nano-regions in relaxor ferroelectrics: A case study of lead-free piezoelectrics Na0.5Bi0.5TiO3-x%BaTiO3
DOI:10.1063/1.4846655  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Ge, Wenwei;Luo, Chengtao;Devreugd, Christopher P.;Zhang, Qinhui;Ren, Yang;Li, Jiefang;Luo, Haosu;Viehland, D.;
7:1:1:144     Orientation dependence on piezoelectric properties of Bi0.5Na0.5TiO3-BaTiO3-SrTiO3 epitaxial thin films
DOI:10.1063/1.4874805  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Li, Wei;Li, Peng;Zeng, Huarong;Hao, Jigong;Zhai, Jiwei;
7:1:1:145     Evolution of structure in Na0.5Bi0.5TiO3 single crystals with BaTiO3
DOI:10.1063/1.4900547  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ge, Wenwei;Luo, Chengtao;Zhang, Qinhui;Ren, Yang;Li, Jiefang;Luo, Haosu;Viehland, D.;
7:1:1:146     Enhanced Piezoelectric and Dielectric Responses in 92.5%(Bi0.5Na0.5) TiO3-7.5%BaTiO3 Ceramics
DOI:10.1111/jace.12864  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Anthoniappen, J.;Lin, C. -H.;Tu, C. S.;Chen, P. -Y.;Chen, C. -S.;Chiu, S. -J.;Lee, H. -Y.;Wang, S. -F.;Hung, C. -M.;
7:1:1:147     Raman spectroscopic study of Na1/2Bi1/2TiO3-x%BaTiO3 single crystals as a function of temperature and composition
DOI:10.1063/1.3587236  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:19  AU: Luo, Liang;Ge, Wenwei;Li, Jiefang;Viehland, D.;Farley, Charles;Bodnar, Robert;Zhang, Qinhui;Luo, Haosu;
7:1:1:148     Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures
DOI:10.1063/1.4751357  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Aksel, Elena;Forrester, Jennifer S.;Foronda, Humberto M.;Dittmer, Robert;Damjanovic, Dragan;Jones, Jacob L.;
7:1:1:149     Large blocking force in Bi1/2Na1/2TiO3-based lead-free piezoceramics
DOI:10.1016/j.scriptamat.2012.03.031  JN:SCRIPTA MATERIALIA  PY:2012
  TC:13  AU: Dittmer, Robert;Aulbach, Emil;Jo, Wook;Webber, Kyle G.;Roedel, Juergen;
7:1:1:150     Incipient piezoelectrics and electrostriction behavior in Sn-doped Bi-1/2( Na0.82K0.18)(1/2) TiO3 lead-free ceramics
DOI:10.1063/1.4801893  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Han, Hyoung-Su;Jo, Wook;Kang, Jin-Kyu;Ahn, Chang-Won;Kim, Ill Won;Ahn, Kyoung-Kwan;Lee, Jae-Shin;
7:1:1:151     Structure, microstructure and dielectric properties of 100-x(Bi0.5Na0.5)TiO3-x[SrTiO3] composites ceramics
DOI:10.1007/s00339-012-7105-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:11  AU: Parija, B.;Rout, S. K.;Cavalcante, L. S.;Simoes, A. Z.;Panigrahi, S.;Longo, E.;Batista, N. C.;
7:1:1:152     Composition induced structure evolution and large strain response in ternary Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-SrTiO3 solid solution
DOI:10.1063/1.4825122  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Wang, Feifei;Leung, Chung Ming;Tang, Yanxue;Wang, Tao;Shi, Wangzhou;
7:1:1:153     Aging in the relaxor and ferroelectric state of Fe-doped (1-x)(Bi1/2Na1/2)TiO3-xBaTiO(3) piezoelectric ceramics
DOI:10.1063/1.4894630  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Sapper, Eva;Dittmer, Robert;Damjanovic, Dragan;Erdem, Emre;Keeble, David J.;Jo, Wook;Granzow, Torsten;Roedel, Juergen;
7:1:1:154     CuO as a sintering additive for (Bi1/2Na1/2)TiO3-BaTiO3-(K0.5Na0.5)NbO3 lead-free piezoceramics
DOI:10.1016/j.jeurceramsoc.2011.05.008  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Jo, Wook;Ollagnier, Jean-Baptiste;Park, Jong-Lo;Anton, Eva-Maria;Kwon, O-Jong;Park, Chan;Seo, Hyun-Ho;Lee, Jong-Sook;Erdem, Emre;Eichel, Ruediger-A.;Roedel, Juergen;
7:1:1:155     Pressure-induced phase transitions and structure of chemically ordered nanoregions in the lead-free relaxor ferroelectric Na1/2Bi1/2TiO3
DOI:10.1103/PhysRevB.86.134118  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Groeting, Melanie;Kornev, Igor;Dkhil, Brahim;Albe, Karsten;
7:1:1:156     Local structure, pseudosymmetry, and phase transitions in Na1/2Bi1/2TiO3-K1/2Bi1/2TiO3 ceramics
DOI:10.1103/PhysRevB.87.024113  JN:PHYSICAL REVIEW B  PY:2013
  TC:9  AU: Levin, I.;Reaney, I. M.;Anton, E-M;Jo, Wook;Roedel, J.;Pokorny, J.;Schmitt, L. A.;Kleebe, H-J;Hinterstein, M.;Jones, J. L.;
7:1:1:157     Crystal structure of 0.96(Na0.5Bi0.5TiO3)-0.04(BaTiO3) from combined refinement of x-ray and neutron diffraction patterns
DOI:10.1063/1.4759117  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Usher, T. -M.;Forrester, J. S.;dela Cruz, C. R.;Jones, J. L.;
7:1:1:158     Structure, Electrical, and Optical Properties of (Na1/2Bi1/2)TiO3-1.5at.%Bi(Zn1/2Ti1/2)O3 Lead-free Single Crystal Grown by a TSSG Technique
DOI:10.1111/jace.12847  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Chen, Chao;Zhang, Haiwu;Zhao, Xiangyong;Deng, Hao;Li, Long;Ren, Bo;Lin, Di;Li, Xiaobing;Luo, Haosu;Chen, Zhen;Su, Jun;
7:1:1:159     The Relationship Between Phase Structure and Electrical Properties in ( 1-x)( Bi0.5Na0.5TiO3-Ba0.5K0.5TiO3-BaTiO3)-xK0.5Na0.5NbO3 Quaternary Lead- Free Piezoelectric Ceramics
DOI:10.1111/jace.12760  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Dai, Ye-Jing;He, Si-Si;Lao, Xun;Zhang, Shi-Zheng;
7:1:1:160     Dielectric and Raman scattering studies of phase transitions in the (100-x)Na0.5Bi0.5TiO3-xSrTiO(3) system
DOI:10.1063/1.3490781  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:19  AU: Rout, Dibyaranjan;Moon, Kyoung-Seok;Kang, Suk-Joong L.;Kim, I. W.;
7:1:1:161     Large strain response based on relaxor-antiferroelectric coherence in Bi0.5Na0.5TiO3-SrTiO3-(K0.5Na0.5)NbO3 solid solutions
DOI:10.1063/1.4901549  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Liu, Laijun;Shi, Danping;Knapp, Michael;Ehrenberg, Helmut;Fang, Liang;Chen, Jun;
7:1:1:162     Frequency and temperature dependence of actuating performance of Bi1/2Na1/2TiO3-BaTiO3 based relaxor/ferroelectric composites
DOI:10.1063/1.4876680  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Groh, Claudia;Jo, Wook;Roedel, Juergen;
7:1:1:163     Synthesis mechanism of grain-oriented lead-free piezoelectric Na0.5Bi0.5TiO3-BaTiO3 ceramics with giant piezoelectric response
DOI:10.1039/c3tc00619k  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:21  AU: Maurya, Deepam;Zhou, Yuan;Yan, Yongke;Priya, Shashank;
7:1:1:164     Large Electromechanical Response in Lead-Free La-Doped BNKT-BST Piezoelectric Ceramics
DOI:10.1111/jace.12952  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Ullah, Amir;Ullah, Aman;Kim, Ill Won;Lee, Dae Su;Jeong, Soon Jong;Ahn, Chang Won;
7:1:1:165     Bipolar fatigue-resistant behavior in ternary Bi0.5Na0.5TiO3-BaTiO3-SrTiO3 solid solutions
DOI:10.1016/j.scriptamat.2014.03.027  JN:SCRIPTA MATERIALIA  PY:2014
  TC:1  AU: Tian, Chengyue;Wang, Feifei;Ye, Xiang;Xie, Yiqun;Wang, Tao;Tang, Yanxue;Sun, Dazhi;Shi, Wangzhou;
7:1:1:166     Dielectric, ferroelectric and electric field-induced strain behavior of Ba(Ti0.90Sn0.10)O-3-modified Bi-0.5(Na0.80K0.20)(0.5)TiO3 lead-free piezoelectrics
DOI:10.1016/j.jallcom.2014.01.183  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Jaita, Pharatree;Watcharapasorn, Anucha;Cann, David P.;Jiansirisomboon, Sukanda;
7:1:1:167     Electrocaloric effect based on the depolarization transition in (1-x)Bi0.5Na0.5TiO3-xKNbO(3) lead-free ceramics
DOI:10.1016/j.ceramint.2013.10.066  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:9  AU: Jiang, Xijie;Luo, Laihui;Wang, Baoyin;Li, Weiping;Chen, Hongbing;
7:1:1:168     The Global and Local Symmetries of Nanostructured Ferroelectric Relaxor 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO(3)
DOI:10.1080/00150193.2014.948358  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Montero-Cabrera, Maria E.;Pardo, Lorena;Garcia, Alvaro;Fuentes-Montero, Maria E.;Lourdes Ballinas-Casarrubias, M.;Fuentes-Cobas, Luis E.;
7:1:1:169     Temperature-Dependent Phase Transitions in the Lead-Free Piezoceramics (1-x - y)(Bi1/2Na1/2)TiO3-xBaTiO(3)-y( K0.5Na0.5)NbO3 Observed by in situ Transmission Electron Microscopy and Dielectric Measurements
DOI:10.1111/jace.12493  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Kling, Jens;Jo, Wook;Dittmer, Robert;Schaab, Silke;Kleebe, Hans-Joachim;
7:1:1:170     Cycling stability of lead-free BNT-8BT and BNT-6BT-3KNN multilayer actuators and bulk ceramics
DOI:10.1016/j.jeurceramsoc.2013.09.006  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:6  AU: Sapper, Eva;Gassmann, Andrea;Gjodvad, Lars;Jo, Wook;Granzow, Torsten;Roedel, Juergen;
7:1:1:171     Ultrahigh ferroelectric response in Fe modified 0.95(Na1/2Bi1/2)TiO3-0.05BaTiO(3) single crystals
DOI:10.1039/c4tc01814a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:1  AU: Zhang, Haiwu;Chen, Chao;Deng, Hao;Ren, Bo;Zhao, Xiangyong;Lin, Di;Li, Xiaobing;Luo, Haosu;
7:1:1:172     Electric field-induced deformation behavior in mixed Bi0.5Na0.5TiO3 and Bi-0.5(Na0.75K0.25)(0.5)TiO3-BiAlO3
DOI:10.1063/1.3621878  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Lee, Dae Su;Lim, Dong Hwan;Kim, Min Soo;Kim, Kwang Ho;Jeong, Soon Jong;
7:1:1:173     Effect of lattice occupation behavior of Li+ cations on microstructure and electrical properties of (Bi1/2Na1/2)TiO3-based lead-free piezoceramics
DOI:10.1063/1.3555598  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:16  AU: Lei, Na;Zhu, Mankang;Yang, Peng;Wang, Lulu;Wang, Longfei;Hou, Yudong;Yan, Hui;
7:1:1:174     Enhanced electrostricitive properties and thermal endurance of textured (Bi0.5Na0.5)TiO3-BaTiO3-(K0.5Na0.5)NbO3 ceramics
DOI:10.1063/1.4817278  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Hao, Jigong;Ye, Chenggen;Shen, Bo;Zhai, Jiwei;
7:1:1:175     Field-induced strain and polarization response in lead-free Bi-1/2(Na0.80K0.20)(1/2)TiO3-SrZrO3 ceramics
DOI:10.1016/j.matchemphys.2013.11.035  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:13  AU: Hussain, Ali;Rahman, Jamil Ur;Zaman, Arif;Malik, Rizwan Ahmed;Kim, Jin Soo;Song, Tae Kwon;Kim, Won Jeong;Kim, Myong Ho;
7:1:1:176     Large electrostrictive strain in lead-free Bi0.5Na0.5TiO3-BaTiO3-KNbO3 ceramics
DOI:10.1007/s00339-010-6074-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:11  AU: Li, Jiaming;Wang, Feifei;Qin, Xiaomei;Xu, Min;Shi, Wangzhou;
7:1:1:177     0.40% Bipolar Strain in Lead Free BNT-KNN System Modified with Li, Ta and Sb
DOI:10.1111/jace.12054  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Singh, Amrita;Chatterjee, Ratnamala;
7:1:1:178     Observation of a time-dependent structural phase transition in potassium sodium bismuth titanate
DOI:10.1063/1.3582616  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Royles, A. J.;Bell, A. J.;Daniels, J. E.;Milne, S. J.;Comyn, T. P.;
7:1:1:179     Phonon modes and central peaks in an A-site relaxor: A low-frequency Raman study of sodium bismuth titanate
DOI:10.1103/PhysRevB.90.054108  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Jackson, Daniel K.;Toulouse, Jean;Luo, Haosu;
7:1:1:180     Structure and ferroelectricity of nonstoichiometric (Na0.5Bi0.5)TiO3
DOI:10.1063/1.4868109  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Carter, Jared;Aksel, Elena;Iamsasri, Thanakorn;Forrester, Jennifer S.;Chen, Jun;Jones, Jacob L.;
7:1:1:181     Microstructural and electrical properties of Na1/2Bi1/2TiO3-(Na1/4Bi3/4)(Mg1/4Ti3/4)O-3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2012.07.092  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:1  AU: Yang, Huabin;Zhou, Changrong;Zhou, Qin;Chen, Guohua;Wang, Hua;Li, Weizhou;
7:1:1:182     Influence of B-site complex-ion substitution on the structure and electrical properties in Bi0.5Na0.5TiO3-based lead-free solid solutions
DOI:10.1016/j.jallcom.2013.09.152  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Jin, C. C.;Wang, F. F.;Wei, L. L.;Tang, J.;Li, Y.;Yao, Q. R.;Tian, C. Y.;Shi, W. Z.;
7:1:1:183     Poling temperature tuned electric-field-induced ferroelectric to antiferroelectric phase transition in 0.89Bi(0.5)Na(0.5)TiO(3)-0.06 BaTiO3-0.05K(0.5)Na(0.5)NbO(3) ceramics
DOI:10.1063/1.3660283  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Gao, Feng;Dong, Xianlin;Mao, Chaoliang;Zhang, Hongling;Cao, Fei;Wang, Genshui;
7:1:1:184     Large strain under a low electric field in lead-free bismuth-based piezoelectrics
DOI:10.1063/1.4813420  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Ullah, Aman;Ahn, Chang Won;Ullah, Amir;Kim, Ill Won;
7:1:1:185     Dielectric, ferroelectric and field-induced strain behavior of K0.5Na0.5NbO3-modified Bi-0.5(Na0.78K0.22)(0.5)TiO3 lead-free ceramics
DOI:10.1016/j.ceramint.2012.01.074  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:17  AU: Hussain, Ali;Ahn, Chang Won;Ullah, Aman;Lee, Jae Shin;Kim, Ill Won;
7:1:1:186     Lead-free Bi-1/2(Na0.82K0.18)(1/2)TiO3 ceramics exhibiting large strain with small hysteresis
DOI:10.1016/j.ceramint.2012.10.166  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Lee, Han-Bok;Heo, Dae-Jun;Malik, Rizwan Ahmed;Yoon, Chang-Ho;Han, Hyoung-Su;Lee, Jae-Shin;
7:1:1:187     Dielectric, ferroelectric and field induced strain properties of Nb-modified Pb-free 0.99Bi(0.5)(Na0.82K0.18)(0.5)TiO3-0.01LiSbO(3) ceramics
DOI:10.1016/j.jallcom.2013.05.140  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:12  AU: Hussain, Ali;Zaman, Arif;Iqbal, Yaseen;Kim, Myong Ho;
7:1:1:188     Destabilization of ferroelectric order in bismuth perovskite ceramics by A-site vacancies
DOI:10.1016/j.matlet.2011.11.068  JN:MATERIALS LETTERS  PY:2012
  TC:14  AU: Han, Hyoung-Su;Ahn, Chang-Won;Kim, Ill Won;Hussain, Ali;Lee, Jae-Shin;
7:1:1:189     Phase coexistence and the structure of the morphotropic phase boundary region in (1-x)Bi(Mg1/2Zr1/2) O3-xPbTiO3 piezoceramics
DOI:10.1016/j.actamat.2014.05.023  JN:ACTA MATERIALIA  PY:2014
  TC:3  AU: Pandey, Rishikesh;Tiwari, Ashish;Upadhyay, Ashutosh;Singh, Akhilesh Kumar;
7:1:1:190     Mechanical confinement for improved energy storage density in BNT-BT-KNN lead-free ceramic capacitors
DOI:10.1063/1.4892608  JN:AIP ADVANCES  PY:2014
  TC:5  AU: Chauhan, Aditya;Patel, Satyanarayan;Vaish, Rahul;
7:1:1:191     Energy storage properties of (1-x)(Bi0.5Na0.5)TiO3-xKNbO(3) lead-free ceramics
DOI:10.1007/s10853-013-7849-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:3  AU: Luo, Laihui;Wang, Baoyin;Jiang, Xijie;Li, Weiping;
7:1:1:192     Electrical and luminescence properties of Er-doped Bi0.5Na0.5TiO3 ceramics
DOI:10.1016/j.mseb.2013.08.007  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:10  AU: Du, Peng;Luo, Laihui;Li, Weiping;Zhang, Yuepin;Chen, Hongbing;
7:1:1:193     Phase coexistence and Mn-doping effect in lead-free ferroelectric (Na1/2Bi1/2)TiO3 crystals
DOI:10.1063/1.3318270  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:18  AU: Tu, C. -S.;Huang, S. -H.;Ku, C. -S.;Lee, H. -Y.;Chien, R. R.;Schmidt, V. H.;Luo, H.;
7:1:1:194     Orthorhombic-tetragonal phase coexistence and enhanced piezo-response at room temperature in Zr, Sn, and Hf modified BaTiO3
DOI:10.1063/1.4885516  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Kalyani, Ajay Kumar;Brajesh, Kumar;Senyshyn, Anatoliy;Ranjan, Rajeev;
7:1:1:195     Effects of sintering temperature and poling conditions on the electrical properties of Bi-0.50(Na0.70K0.20Li0.10)(0.50)TiO3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2012.02.067  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Zhang, Binyu;Wu, Jiagang;Wu, Bo;Xiao, Dingquan;Zhu, Jianguo;
7:1:1:196     Observation of partially incoherent < 110 > boundaries between polar nanodomains in Na1/2Bi1/2TiO3 single crystals
DOI:10.1063/1.3488879  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Yao, Jianjun;Ge, Wenwei;Yang, Yaodong;Luo, Liang;Li, Jiefang;Viehland, D.;Bhattacharyya, Somnath;Zhang, Qinhui;Luo, Haosu;
7:1:1:197     Optical properties of an epitaxial Na0.5Bi0.5TiO3 thin film grown by laser ablation: Experimental approach and density functional theory calculations
DOI:10.1063/1.3400095  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Bousquet, M.;Duclere, J. -R.;Orhan, E.;Boulle, A.;Bachelet, C.;Champeaux, C.;
7:1:1:198     Electric field induced polarization and strain of Bi-based ceramic composites
DOI:10.1063/1.4770372  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Lee, Dae Su;Jeong, Soon Jong;Kim, Min Soo;Koh, Jung Hyuk;
7:1:1:199     BNT-based multilayer device with large and temperature independent strain made by a water-based preparation process
DOI:10.1016/j.jeurceramsoc.2011.02.032  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Krauss, Werner;Schuetz, Denis;Naderer, Michael;Orosel, Denis;Reichmann, Klaus;
7:1:1:200     Band gap modification and ferroelectric properties of Bi-0.5(Na,K)(0.5)TiO3-based by Li substitution
DOI:10.1063/1.4863092  JN:AIP ADVANCES  PY:2014
  TC:6  AU: Ngo Duc Quan;Vu Ngoc Hung;Nguyen Van Quyet;Hoang Vu Chung;Dang Duc Dung;
7:1:1:201     Dielectric, ferroelectric, and field-induced strain properties of Ta-doped 0.99Bi(0.5)(Na0.82K0.18)(0.5)TiO3-0.01LiSbO(3) ceramics
DOI:10.1007/s10853-014-8024-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:4  AU: Zaman, A.;Iqbal, Y.;Hussain, A.;Kim, M. H.;Malik, R. A.;
7:1:1:202     Effects of Bi nonstoichiometry in (Bi0.5+xNa) TiO3 ceramics
DOI:10.1063/1.3525370  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: Sung, Y. S.;Kim, J. M.;Cho, J. H.;Song, T. K.;Kim, M. H.;Park, T. G.;
7:1:1:203     Microstructure, ferroelectric, and piezoelectric properties of (1 - x - y)Bi0.5Na0.5TiO3-xBaTiO(3)-yBi(0.5)Ag(0.5)TiO(3) lead-free ceramics
DOI:10.1016/j.jallcom.2010.09.062  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:10  AU: Wu, Lang;Xiao, Dingquan;Zhou, Fei;Teng, Yuancheng;Li, Yuxiang;
7:1:1:204     Large strain response in acceptor- and donor-doped Bi0.5Na0.5TiO3-based lead-free ceramics
DOI:10.1007/s10853-011-5523-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:9  AU: Li, Jiaming;Wang, Feifei;Leung, Chung Ming;Or, Siu Wing;Tang, Yanxue;Chen, Xinman;Wang, Tao;Qin, Xiaomei;Shi, Wangzhou;
7:1:1:205     Short range polar state transitions and deviation from Rayleigh-type behaviour in Bi0.5Na0.5TiO3-based perovskites
DOI:10.1063/1.4895559  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Viola, Giuseppe;Tan, Yongqiang;McKinnon, Ruth Agnes;Wei, Xiaoyong;Yan, Haixue;Reece, Michael John;
7:1:1:206     The effects of sintering atmosphere on microstructures and electrical properties of lead-free (Bi0.5Na0.5)TiO3-based ceramics
DOI:10.1016/j.ceramint.2014.02.034  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Chen, Cheng-Sao;Chen, Pin-Yi;Tu, Chi-Shun;Chang, Ting-Lun;Chai, Chih-Kang;
7:1:1:207     Influence of BaTiO3 Content on the Structure and Properties of Na0.5Bi0.5TiO3 Crystals
DOI:10.1111/j.1551-2916.2011.04433.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Ge, Wenwei;Cao, Hu;DeVreugd, Christopher;Li, Jiefang;Viehland, Dwight;Zhang, Qinhui;Luo, Haosu;
7:1:1:208     Ferroelectric, electromechanical, and dielectric properties of (Na0.5Bi0.5)(0.94)Ba0.06TiO3 co-doped MnO2 and La2O3 lead-free ceramics
DOI:10.1007/s10853-013-7694-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:0  AU: Li, Qiang;Wang, Hairong;Fan, Huiqing;Long, Changbai;Liu, Xiao;
7:1:1:209     Lead-free Bi-1/2(Na0.82K0.18)(1/2)TiO3 relaxor ferroelectrics with temperature insensitive electrostrictive coefficient
DOI:10.1016/j.ceramint.2012.10.046  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Vu Diem Ngoc Tran;Thi Hinh Dinh;Han, Hyoung-Su;Jo, Wook;Lee, Jae-Shin;
7:1:1:210     Composition and temperature-induced structure evolution in Bi0.5Na0.5TiO3-based solid solutions
DOI:10.1007/s10853-011-5796-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:6  AU: Wang, Feifei;Xu, Min;Leung, Chung Ming;Tang, Yanxue;Wang, Tao;Chen, Xinman;Shi, Wangzhou;
7:1:1:211     Field induced strain response of lead-free BaZrO3-modified Bi0.5Na0.5TiO3-BaTiO3 ceramics
DOI:10.1016/j.jallcom.2014.01.031  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:7  AU: Rahman, Jamil Ur;Hussain, Ali;Maqbool, Adnan;Ryu, Gyung Hyun;Song, Tae Kwon;Kim, Won-Jeong;Kim, Myong Ho;
7:1:1:212     Structural observation of piezoelectric inhomogeneity in a mixed-orientation Na0.5Bi0.5TiO3 perovskite thin film
DOI:10.1063/1.4904458  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Carbone, D.;Pateras, A. I.;Bussone, G.;Evans, P. G.;Cornelius, T. W.;Bousquet, M.;Boulle, A.;Gautier, B.;Duclere, J. R.;
7:1:1:213     Structure and Dielectric Properties of Na1/2Bi1/2TiO3-BaTiO3 Solid Solutions
DOI:10.1080/00150193.2013.821382  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Dunce, M.;Birks, E.;Antonova, M.;Plaude, A.;Ignatans, R.;Sternberg, A.;
7:1:1:214     Dielectric and Raman Spectroscopic Studies of Na0.5Bi0.5TiO3-BaSnO3 Ferroelectric System
DOI:10.1111/jace.12838  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Tripathy, Satya Narayan;Mishra, Karuna Kara;Sen, Shrabanee;Pradhan, Dillip K.;
7:1:1:215     A correlated electron diffraction, in situ neutron diffraction and dielectric properties investigation of poled (1-x)Bi0.5Na0.5TiO3-xBaTiO(3) ceramics
DOI:10.1063/1.3654140  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Wang, Jian;Liu, Yun;Withers, Ray L.;Studer, Andrew;Li, Qian;Noren, Lasse;Guo, Yiping;
7:1:1:216     Large electrostrictive effect in ternary Bi0.5Na0.5TiO3-based solid solutions
DOI:10.1063/1.4811812  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Wang, Feifei;Jin, Chengchao;Yao, Qirong;Shi, Wangzhou;
7:1:1:217     Ferroelectric domain evolution in 0.9625Bi(0.5)Na(0.5)TiO(3)-0.0375BiZn(0.5)Ti(0.5)O(3) piezoceramic
DOI:10.1016/j.ceramint.2014.05.118  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Chen, Xiaomin;Xu, Xijun;Yuan, Guoliang;Lu, Ming-Hui;Zhang, Shan-Tao;Yin, Jiang;Liu, Zhiguo;
7:1:1:218     Poling effect on d(33) in textured Bi0.5Na0.5TiO3-based materials
DOI:10.1016/j.scriptamat.2012.10.047  JN:SCRIPTA MATERIALIA  PY:2013
  TC:6  AU: Fancher, Chris M.;Blendell, John E.;Bowman, Keith J.;
7:1:1:219     Structural and electrical properties of BKT rich Bi0.5K0.5TiO3-K0.5Na0.5NbO3 system
DOI:10.1063/1.4796166  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Singh, Amrita;Chatterjee, Ratnamala;
7:1:1:220     Morphotropic phase boundary and electrical properties of 1-x[Bi0.5Na0.5]TiO3 -xBa[Zr0.25Ti0.75]O-3 lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2012.11.080  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Parija, B.;Badapanda, T.;Rout, S. K.;Cavalcante, L. S.;Panigrahi, S.;Longo, E.;Batista, N. C.;Sinha, T. P.;
7:1:1:221     Structure and electrical properties of 0.85(Bi0.5Na0.5)TiO3-0.12BaTiO(3)-0.03SrTiO(3) ferroelectric ceramics
DOI:10.1016/j.jeurceramsoc.2013.04.036  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Mgbemere, Henry E.;Fernandes, Rodrigo P.;Schneider, Gerold A.;
7:1:1:222     Theoretical prediction of morphotropic compositions in Na1/2Bi1/2TiO3-based solid solutions from transition pressures
DOI:10.1103/PhysRevB.89.054105  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Groeting, Melanie;Albe, Karsten;
7:1:1:223     Inference of oxygen vacancies in hydrothermal Na0.5Bi0.5TiO3
DOI:10.1063/1.4755882  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: O'Brien, Aoife;Woodward, David I.;Sardar, Kripasindhu;Walton, Richard I.;Thomas, Pam A.;
7:1:1:224     Synthesis, dielectric and relaxation behavior of lead free NBT-BT ceramics
DOI:10.1016/j.ceramint.2012.06.063  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Sundari, S. Shanmuga;Kumar, Binay;Dhanasekaran, R.;
7:1:1:225     Ferroelectric, dielectric properties and large strain response in Zr-modified (Bi0.5Na0.5)TiO3-BaTiO3 lead-free ceramics
DOI:10.1016/j.ceramint.2013.11.066  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:8  AU: Jin, C. C.;Wang, F. F.;Yao, Q. R.;Tang, Y. X.;Wang, T.;Shi, W. Z.;
7:1:1:226     A family of oxide ion conductors based on the ferroelectric perovskite Na0.5Bi0.5TiO3
DOI:10.1038/NMAT3782  JN:NATURE MATERIALS  PY:2014
  TC:35  AU: Li, Ming;Pietrowski, Martha J.;De Souza, Roger A.;Zhang, Huairuo;Reaney, Ian M.;Cook, Stuart N.;Kilner, John A.;Sinclair, Derek C.;
7:1:1:227     The influence of Ti-nonstoichiometry in Bi0.5Na0.5TiO3
DOI:10.1016/j.jeurceramsoc.2013.10.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Naderer, Michael;Kainz, Theresa;Schuetz, Denis;Reichmann, Klaus;
7:1:1:228     The effects of aliovalent cations doping on electric-field-induced strain and microstructures of (Bi0.5Na0.5)(0.94)Ba0.06TiO3 lead-free piezoceramics
DOI:10.1016/j.ceramint.2012.10.048  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Chen, Pin-Yi;Chou, Chen-Chia;Chen, Cheng Nan;Chen, Cheng-Sao;Chen, Haydn;
7:1:1:229     A-site occupancy in the lead-free (Bi1/2Na1/2TiO3)(0.94)-(BaTiO3)(0.06) piezoceramic: Combining first-principles study and TEM
DOI:10.1063/1.3437631  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Kling, Jens;Hayn, Silke;Schmitt, Ljubomira A.;Groeting, Melanie;Kleebe, Hans-Joachim;Albe, Karsten;
7:1:1:230     Effect of neodymium substitution on structural and ferroelectric properties of BNT ceramics
DOI:10.1016/j.materresbul12013.11.060  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:5  AU: Pal, Vijayeta;Dwivedi, R. K.;Thakur, O. P.;
7:1:1:231     Effect of composition on electrical properties of lead-free Bi-0.5(Na0.80K0.20)(0.5)TiO3-(Ba0.98Nd0.02)TiO3 piezoelectric ceramics
DOI:10.1063/1.4811813  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Jaita, Pharatree;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:1:1:232     Lead-free electrostrictive bismuth perovskite ceramics with thermally stable field-induced strains
DOI:10.1016/j.matlet.2011.05.059  JN:MATERIALS LETTERS  PY:2011
  TC:0  AU: Vu Diem Ngoc Tran;Han, Hyoung-Su;Yoon, Chang-Ho;Lee, Jae-Shin;Jo, Wook;Roedel, Juergen;
7:1:1:233     Structure and strain behavior of < 001 > textured BNT-based ceramics by template grain growth
DOI:10.1016/j.matlet.2013.01.088  JN:MATERIALS LETTERS  PY:2013
  TC:9  AU: Bai, Wangfeng;Hao, Jigong;Fu, Fang;Li, Wei;Shen, Bo;Zhai, Jiwei;
7:1:1:234     The effect of a hydrostatic pressure induced phase transformation on the unipolar electrical response of Nb modified 95/5 lead zirconate titanate
DOI:10.1063/1.3677980  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Valadez, J. C.;Sahul, R.;Alberta, E.;Hackenberger, W.;Lynch, C. S.;
7:1:1:235     Phase structure and electrical properties of (0.8-x)BaTiO3-0.2Bi(0.5)Na(0.5)TiO(3)-xBaZrO(3) lead-free piezoceramics
DOI:10.1016/j.jallcom.2011.08.101  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Zhou, Fei;Wu, Lang;Liu, Naiming;Teng, Yuancheng;Li, Yuxiang;Wen, Jianwu;Ren, Xuetan;
7:1:1:236     Lead-free and lead-based ABO(3) perovskite relaxors with mixed-valence A-site and B-site disorder: Comparative neutron scattering structural study of (Na1/2Bi1/2) TiO3 and Pb(Mg1/3Nb2/3)O-3
DOI:10.1103/PhysRevB.88.174115  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:1:1:237     Pulsed laser deposition of lead-free (Na0.5Bi0.5)(1-x)BaxTiO3 ferroelectric thin films with enhanced dielectric properties
DOI:10.1016/j.apsusc.2012.10.094  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:6  AU: Andrei, A.;Scarisoreanu, N. D.;Birjega, R.;Dinescu, M.;Stanciu, G.;Craciun, F.;Galassi, C.;
7:1:1:238     Raman Spectroscopy Study of Na1/2Bi1/2TiO3-BaTiO3 Lead-Free Single Crystal Relaxor Piezoelectrics
DOI:10.1080/00150193.2010.482845  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Gregora, I.;Ondrejkovic, P.;Simon, E.;Berta, M.;Savinov, M.;Hlinka, J.;Luo, H.;Zhang, Q.;
7:1:1:239     Local structural disorder and its influence on the average global structure and polar properties in Na0.5Bi0.5TiO3
DOI:10.1103/PhysRevB.88.224103  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:1:1:240     Relaxor effect on electric field induced large strain in (1-x)(Bi0.5Na0.5) TiO3-xBaTiO3 lead-free piezoceramics
DOI:10.1016/j.ceramint.2013.11.065  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Chen, Pin-Yi;Chen, Cheng-Sao;Tu, Chi-Shun;Cheng, Chun-Der;Cherng, Jyh-Shiarn;
7:1:1:241     High pressure in situ differential thermal analysis of Na0.5Bi0.5TiO3 phase transitions up to 5 GPa
DOI:10.1016/j.jallcom.2012.03.102  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Xu, Chao;He, Duanwei;Wang, Haikuo;Liu, Chunmei;Yin, Shuai;Wang, Kaixue;Guan, Junwei;Peng, Fang;Kou, Zili;
7:1:1:242     Phase structure and electrical properties of lead-free (1-x)(Bi0.5Na0.5)(0.88)Ba0.12TiO3-xAg(0.9)Li(0.1)NbO(3) piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.07.208  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:4  AU: Wu, Lang;Liu, Naiming;Zhou, Fei;Wu, Wenjuan;Teng, Yuancheng;Li, Yuxiang;
7:1:1:243     Phase transition and electrical properties in the Li-modified Bi0.5Na0.5TiO3-based lead-free ceramics
DOI:10.1007/s10853-011-6052-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Wang, Feifei;Xu, Min;Wang, Tao;Tang, Yanxue;Shi, Wangzhou;
7:1:1:244     Poling effect and piezoelectric response in high-strain ferroelectric 0.70Pb(Mg(1/3)Nb(2/3))O(3)-0.30PbTiO(3) crystal
DOI:10.1063/1.3475150  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Chen, H. -Y.;Tu, C. -S.;Hung, C. -M.;Chien, R. R.;Schmidt, V. H.;Ku, C. -S.;Lee, H. -Y.;
7:1:1:245     Dielectric properties in lead-free piezoelectric (Bi0.5Na0.5)TiO3-BaTiO3 single crystals and ceramics
DOI:10.1010/j.jervsgro.2013.09.011  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:3  AU: Chen, C. -S.;Tu, C. S.;Chen, P. -Y.;Ting, Y.;Chiu, S. -J.;Hung, C. M.;Lee, H. -Y;Wang, S. -F.;Anthoninappen, J.;Schmidt, V. H.;Chien, R. R.;
7:1:1:246     Grain-oriented sodium bismuth titanate-based lead-free piezoelectric ceramics prepared using the pulsed strong magnetic field and template grain growth
DOI:10.1063/1.3486474  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Zhao, Jun;Wang, Fajun;Li, Wen;Li, Hui;Zhou, Dongxiang;Gong, Shuping;Hu, Yunxiang;Fu, Qiuyun;
7:1:1:247     Structure, ferroelectric properties, and electric field-induced large strain in lead-free Bi-0.5(Na,K)(0.5)TiO3-(Bi0.5La0.5)AlO3 piezoelectric ceramics
DOI:10.1016/j.ceramint.2011.05.013  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Ullah, Aman;Ahn, Chang Won;Lee, Sun Young;Kim, Jin Soo;Kim, Ill Won;
7:1:1:248     Structural and Electrical Properties of Mn-doped Na0.5Bi0.5TiO3 Lead-Free Single Crystal
DOI:10.1080/10584587.2013.780141  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:2  AU: Chen, Y.;Lam, K. H.;Zhou, D.;Dai, J. Y.;Luo, H. S.;Jiang, X. P.;Chan, H. L. W.;
7:1:1:249     Phase transitions and phase diagram of the ferroelectric perovskite (Na0.5Bi0.5)(1-x)BaxTiO3 by anelastic and dielectric measurements (vol 81, 144124, 2010)
DOI:10.1103/PhysRevB.83.059902  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Cordero, F.;Craciun, F.;Trequattrini, F.;Mercadelli, E.;Galassi, C.;
7:1:1:250     Origin of large recoverable strain in 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO(3) near the ferroelectric-relaxor transition (vol 102, 062902, 2013)
DOI:10.1063/1.4795239  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Simons, Hugh;Daniels, John E.;Glaum, Julia;Studer, Andrew J.;Jones, Jacob L.;Hoffman, Mark;
7:1:1:251     Hysteresis of Field-Induced Ferroelectric Transition in Pb(Mg1/3Nb2/3)O-3 Relaxor Ferroelectrics
DOI:10.1080/00150193.2013.821855  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Novak, N.;Kutnjak, Z.;
7:1:1:252     Dielectric and ferroelectric properties in (Sr,Ni,Na)TiO3 solid solutions
DOI:10.1063/1.3429234  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Ang, Chen;Yu, Zhi;
7:1:1:253     Structure composition correlation in KNN-BT ceramics - An X-ray diffraction and Raman spectroscopic investigation
DOI:10.1016/j.matchemphys.2012.12.082  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:3  AU: Singh, Rajan;Kambale, Kaustubh;Kulkarni, Ajit R.;Harendranath, Cs.;
7:1:1:254     Voronoi-based three-dimensional polygonal finite elements for electromechanical problems
DOI:10.1016/j.commatsci.2012.02.049  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:1  AU: Jayabal, Kaliappan;Menzel, Andreas;
7:1:1:255     Relaxor Ferroelectric Behavior and Structural Aspects of SrNaBi2Nb3O12 Ceramics
DOI:10.1111/j.1551-2916.2011.04954.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Kumar, Sunil;Ochoa, Diego A.;Eduardo Garcia, Jose;Varma, Kalidindi B. R.;
7:1:1:256     Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach (vol 115, 124108, 2014)
DOI:10.1063/1.4875100  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Khansur, Neamul H.;Groh, Claudia;Jo, Wook;Reinhard, Christina;Kimpton, Justin A.;Webber, Kyle G.;Daniels, John E.;
7:1:1:257     Influence of hydrothermal synthesis conditions on BNT-based piezoceramics
DOI:10.1016/j.jeurceramsoc.2011.04.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Trelcat, Jean-Francois;d'Astorg, Sophie;Courtois, Christian;Champagne, Philippe;Rguiti, Mohamed;Leriche, Anne;
7:1:1:258     Temperature and Frequency Dependence of Electric Field-Induced Phase Transitions in PMN-0.32PT
DOI:10.1111/jace.12904  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Wooldridge, Jenny;Stewart, Mark;Vecchini, Carlo;Cain, Markys G.;Gutmann, Matthias;Reece, Mike;
7:1:1:259     Area fraction quantification of ferroelectric domain orientations in BaTiO(3) using piezoresponse force microscopy
DOI:10.1063/1.3467531  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Fernandes, Rodrigo P.;Herber, Ralf-Peter;Kunz, Lothar;Mgbemere, Henry E.;Schneider, Gerold A.;
7:1:1:260     Electron paramagnetic resonance investigation of polar nanoregions mobility in the relaxor PbMg1/3Nb2/3O3 and solid solutions PbMg1/3Nb2/3O3 - PbTiO3
DOI:10.1063/1.3675170  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Glinchuk, Maya D.;Laguta, Valentin V.;Yurchenko, Lesya P.;Rosa, Jan;Jastrabik, Lubomir;Eremkin, Vladimir V.;Smotrakov, Valery G.;
7:1:2:1     Organic and inorganic relaxor ferroelectrics with giant electrocaloric effect
DOI:10.1063/1.3501975  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:79  AU: Lu, S. G.;Rozic, B.;Zhang, Q. M.;Kutnjak, Z.;Li, Xinyu;Furman, E.;Gorny, Lee J.;Lin, Minren;Malic, B.;Kosec, M.;Blinc, R.;Pirc, R.;
7:1:2:2     Electrocaloric materials for future solid-state refrigeration technologies
DOI:10.1016/j.pmatsci.2012.02.001  JN:PROGRESS IN MATERIALS SCIENCE  PY:2012
  TC:78  AU: Valant, Matjaz;
7:1:2:3     Comparison of directly and indirectly measured electrocaloric effect in relaxor ferroelectric polymers
DOI:10.1063/1.3514255  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:54  AU: Lu, S. G.;Rozic, B.;Zhang, Q. M.;Kutnjak, Z.;Pirc, R.;Lin, Minren;Li, Xinyu;Gorny, Lee;
7:1:2:4     Caloric materials near ferroic phase transitions
DOI:10.1038/NMAT3951  JN:NATURE MATERIALS  PY:2014
  TC:65  AU: Moya, X.;Kar-Narayan, S.;Mathur, N. D.;
7:1:2:5     Direct measurement of giant electrocaloric effect in BaTiO3 multilayer thick film structure beyond theoretical prediction
DOI:10.1063/1.3430045  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:54  AU: Bai, Yang;Zheng, Guangping;Shi, Sanqiang;
7:1:2:6     Giant Electrocaloric Strength in Single-Crystal BaTiO3
DOI:10.1002/adma.201203823  JN:ADVANCED MATERIALS  PY:2013
  TC:61  AU: Moya, Xavier;Stern-Taulats, Enric;Crossley, Sam;Gonzalez-Alonso, David;Kar-Narayan, Sohini;Planes, Antoni;Manosa, Lluis;Mathur, Neil D.;
7:1:2:7     Enhanced electrocaloric effect in ferroelectric poly(vinylidene-fluoride/trifluoroethylene) 55/45 mol % copolymer at ferroelectric-paraelectric transition
DOI:10.1063/1.3569953  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:40  AU: Lu, S. G.;Rozic, B.;Zhang, Q. M.;Kutnjak, Z.;Neese, Bret;
7:1:2:8     Pyroelectric and electrocaloric materials
DOI:10.1039/c2tc00283c  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:37  AU: Li, Xinyu;Lu, Sheng-Guo;Chen, Xiang-Zhong;Gu, Haiming;Qiana, Xiao-shi;Zhang, Q. M.;
7:1:2:9     Bridging the Macroscopic and Atomistic Descriptions of the Electrocaloric Effect
DOI:10.1103/PhysRevLett.108.167604  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:24  AU: Ponomareva, I.;Lisenkov, S.;
7:1:2:10     Giant electrocaloric effect in asymmetric ferroelectric tunnel junctions at room temperature
DOI:10.1063/1.4866272  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Liu, Yang;Infante, Ingrid C.;Lou, Xiaojie;Dkhil, Brahim;
7:1:2:11     Novel polymer ferroelectric behavior via crystal isomorphism and the nanoconfinement effect
DOI:10.1016/j.polymer.2013.01.035  JN:POLYMER  PY:2013
  TC:24  AU: Yang, Lianyun;Li, Xinyu;Allahyarov, Elshad;Taylor, Philip L.;Zhang, Q. M.;Zhu, Lei;
7:1:2:12     Prediction of giant elastocaloric strength and stress-mediated electrocaloric effect in BaTiO3 single crystals
DOI:10.1103/PhysRevB.90.104107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Liu, Yang;Wei, Jie;Janolin, Pierre-Eymeric;Infante, Ingrid C.;Kreisel, Jens;Lou, Xiaojie;Dkhil, Brahim;
7:1:2:13     Electrocaloric effect in a ferroelectric Pb(Zn1/3Nb2/3)O-3-PbTiO3 single crystal
DOI:10.1103/PhysRevB.81.214110  JN:PHYSICAL REVIEW B  PY:2010
  TC:34  AU: Valant, Matjaz;Dunne, Lawrence J.;Axelsson, Anna-Karin;Alford, Neil McN.;Manos, George;Perantie, Jani;Hagberg, Juha;Jantunen, Heli;Dabkowski, Antoni;
7:1:2:14     Giant Electrocaloric Response Over A Broad Temperature Range in Modifi ed BaTiO 3 Ceramics
DOI:10.1002/adfm.201302386  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:23  AU: Qian, Xiao-Shi;Ye, Hui-Jian;Zhang, Ying-Tang;Gu, Haiming;Li, Xinyu;Randall, C. A.;Zhang, Q. M.;
7:1:2:15     Tunable temperature dependence of electrocaloric effect in ferroelectric relaxor poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene terpolymer
DOI:10.1063/1.3624533  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:34  AU: Li, Xinyu;Qian, Xiao-shi;Lu, S. G.;Cheng, Jiping;Fang, Zhao;Zhang, Q. M.;
7:1:2:16     Direct and indirect electrocaloric measurements on < 001 >-PbMg1/3Nb2/3O3-30PbTiO(3) single crystals
DOI:10.1063/1.4730338  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:19  AU: Le Goupil, Florian;Berenov, Andrey;Axelsson, Anna-Karin;Valant, Matjaz;Alford, Neil McN;
7:1:2:17     Next-generation electrocaloric and pyroelectric materials for solid-state electrothermal energy interconversion
DOI:10.1557/mrs.2014.256  JN:MRS BULLETIN  PY:2014
  TC:5  AU: Alpay, S. Pamir;Mantese, Joseph;Trolier-McKinstry, Susan;Zhang, Qiming;Whatmore, Roger W.;
7:1:2:18     Giant room-temperature barocaloric effect and pressure-mediated electrocaloric effect in BaTiO3 single crystal
DOI:10.1063/1.4873162  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Liu, Yang;Wei, Jie;Janolin, Pierre-Eymeric;Infante, Ingrid C.;Lou, Xiaojie;Dkhil, Brahim;
7:1:2:19     Enhanced electrocaloric effect in lead-free BaTi1-xSnxO3 ceramics near room temperature
DOI:10.1063/1.4895615  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Luo, Zhengdong;Zhang, Dawei;Liu, Yang;Zhou, Di;Yao, Yonggang;Liu, Chenqi;Dkhil, Brahim;Ren, Xiaobing;Lou, Xiaojie;
7:1:2:20     Optimized electrocaloric refrigeration capacity in lead-free (1-x)BaZr0.2Ti0.8O3-xBa(0.7)Ca(0.3)TiO(3) ceramics
DOI:10.1063/1.4810916  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Bai, Yang;Han, Xi;Qiao, Lijie;
7:1:2:21     Upper bounds on the electrocaloric effect in polar solids
DOI:10.1063/1.3543628  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:22  AU: Pirc, R.;Kutnjak, Z.;Blinc, R.;Zhang, Q. M.;
7:1:2:22     Influence of the critical point on the electrocaloric response of relaxor ferroelectrics
DOI:10.1063/1.3641975  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:34  AU: Rozic, Brigita;Kosec, Marija;Ursic, Hana;Holc, Janez;Malic, Barbara;Zhang, Q. M.;Blinc, Robert;Pirc, Rasa;Kutnjak, Zdravko;
7:1:2:23     Abnormal electrocaloric effect of Na0.5Bi0.5TiO3-BaTiO3 lead-free ferroelectric ceramics above room temperature
DOI:10.1016/j.materresbull.2011.07.038  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:41  AU: Bai, Yang;Zheng, Guang-Ping;Shi, San-Qiang;
7:1:2:24     Electrocaloric effect in relaxor ferroelectrics
DOI:10.1063/1.3650906  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:31  AU: Pirc, R.;Kutnjak, Z.;Blinc, R.;Zhang, Q. M.;
7:1:2:25     Enhanced cooling capacities of ferroelectric materials at morphotropic phase boundaries
DOI:10.1063/1.3595344  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:22  AU: Chukka, Rami;Cheah, Jun Wei;Chen, Zuhuang;Yang, P.;Shannigrahi, S.;Wang, Junling;Chen, Lang;
7:1:2:26     Giant Electrocaloric Effect Around T-c
DOI:10.1103/PhysRevLett.109.187604  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:19  AU: Rose, Maimon C.;Cohen, R. E.;
7:1:2:27     A Giant Electrocaloric Effect in Nanoscale Antiferroelectric and Ferroelectric Phases Coexisting in a Relaxor Pb0.8Ba0.2ZrO3 Thin Film at Room Temperature
DOI:10.1002/adfm.201202525  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:43  AU: Peng, Biaolin;Fan, Huiqing;Zhang, Qi;
7:1:2:28     Electro-caloric effect in 0.45BaZr(0.2)Ti(0.8)O(3)-0.55Ba(0.7)Ca(0.3)TiO(3) single crystal
DOI:10.1063/1.4793213  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:13  AU: Singh, Gurvinderjit;Bhaumik, Indranil;Ganesamoorthy, S.;Bhatt, R.;Karnal, A. K.;Tiwari, V. S.;Gupta, P. K.;
7:1:2:29     Giant mechanically-mediated electrocaloric effect in ultrathin ferroelectric capacitors at room temperature
DOI:10.1063/1.4861456  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:8  AU: Liu, Yang;Infante, Ingrid C.;Lou, Xiaojie;Lupascu, Doru C.;Dkhil, Brahim;
7:1:2:30     Electric-field-induced dielectric and temperature changes in a < 011 >-oriented Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystal
DOI:10.1103/PhysRevB.82.134119  JN:PHYSICAL REVIEW B  PY:2010
  TC:23  AU: Perantie, J.;Hagberg, J.;Uusimaki, A.;Jantunen, H.;
7:1:2:31     Orientation dependence of electrocaloric effects in Pb(Zn1/3Nb2/3)-PbTiO3 single crystals
DOI:10.1063/1.4816441  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Chukka, Rami;Vandrangi, Suresh;Chen, Zuhuang;You, Lu;Wang, Junling;Yang, Ping;Chen, Lang;
7:1:2:32     Giant electrocaloric effect in ferroelectric poly(vinylidenefluoride-trifluoroethylene) copolymers near a first-order ferroelectric transition
DOI:10.1063/1.4756697  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:15  AU: Li, Xinyu;Qian, Xiao-Shi;Gu, Haiming;Chen, Xiangzhong;Lu, S. G.;Lin, Minren;Bateman, Fred;Zhang, Q. M.;
7:1:2:33     Combined effects of diffuse phase transition and microstructure on the electrocaloric effect in Ba1-xSrxTiO3 ceramics
DOI:10.1063/1.4825266  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Bai, Yang;Han, Xi;Ding, Kai;Qiao, Li-Jie;
7:1:2:34     Direct measurement of the electrocaloric effect in poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) terpolymer films
DOI:10.1063/1.4830369  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Basso, Vittorio;Russo, Florence;Gerard, Jean-Francois;Pruvost, Sebastien;
7:1:2:35     Electrocaloric effects in spark plasma sintered Ba0.7Sr0.3TiO3-based ceramics: Effects of domain sizes and phase constitution
DOI:10.1016/j.ceramint.2014.03.175  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Liu, Xiao Qiang;Chen, Ting Ting;Sen Fu, Mao;Wu, Yong Jun;Chen, Xiang Ming;
7:1:2:36     Giant Room-Temperature Elastocaloric Effect in Ferroelectric Ultrathin Films
DOI:10.1002/adma.201401935  JN:ADVANCED MATERIALS  PY:2014
  TC:9  AU: Liu, Yang;Infante, Ingrid C.;Lou, Xiaojie;Bellaiche, Laurent;Scott, James F.;Dkhil, Brahim;
7:1:2:37     A solid-state refrigerator based on the electrocaloric effect
DOI:10.1063/1.4729038  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:17  AU: Jia, Yanbing;Sungtaek, Y.;
7:1:2:38     A chip scale electrocaloric effect based cooling device
DOI:10.1063/1.4799283  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:16  AU: Gu, Haiming;Qian, Xiaoshi;Li, Xinyu;Craven, Brent;Zhu, Wenyi;Cheng, Ailan;Yao, S. C.;Zhang, Q. M.;
7:1:2:39     Giant electrocaloric effect in BaZr0.2Ti0.8O3 thick film
DOI:10.1063/1.4898599  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ye, Hui-Jian;Qian, Xiao-Shi;Jeong, Dae-Yong;Zhang, Shujun;Zhou, Yue;Shao, Wen-Zhu;Zhen, Liang;Zhang, Q. M.;
7:1:2:40     Enhanced electrocaloric and pyroelectric response from ferroelectric multilayers
DOI:10.1063/1.4892455  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Kesim, M. T.;Zhang, J.;Alpay, S. P.;Martin, L. W.;
7:1:2:41     Impact of critical point on piezoelectric and electrocaloric response in barium titanate
DOI:10.1103/PhysRevB.87.104102  JN:PHYSICAL REVIEW B  PY:2013
  TC:10  AU: Novak, Nikola;Pirc, Rasa;Kutnjak, Zdravko;
7:1:2:42     Electrocaloric properties in relaxor ferroelectric (1-x)Pb( Mg1/3Nb2/3)O-3-xPbTiO(3) system
DOI:10.1063/1.4829012  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Perantie, J.;Tailor, H. N.;Hagberg, J.;Jantunen, H.;Ye, Z. -G.;
7:1:2:43     The giant electrocaloric effect and high effective cooling power near room temperature for BaTiO3 thick film
DOI:10.1063/1.3658251  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:30  AU: Bai, Yang;Zheng, Guang-Ping;Ding, Kai;Qiao, Lijie;Shi, San-Qiang;Guo, Dong;
7:1:2:44     Direct electrocaloric measurements of a multilayer capacitor using scanning thermal microscopy and infra-red imaging
DOI:10.1063/1.4788924  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:14  AU: Kar-Narayan, S.;Crossley, S.;Moya, X.;Kovacova, V.;Abergel, J.;Bontempi, A.;Baier, N.;Defay, E.;Mathur, N. D.;
7:1:2:45     Electro-caloric effect in (Ba1-xCax)(Zr0.05Ti0.95)O-3: A lead-free ferroelectric material
DOI:10.1063/1.4829635  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Singh, Gurvinderjit;Tiwari, V. S.;Gupta, P. K.;
7:1:2:46     Effect of Ce doping on the electrocaloric effect of SrxBa1-xNb2O6 single crystals
DOI:10.1063/1.4881842  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Le Goupil, Florian;Axelsson, Anna-Karin;Valant, Matjaz;Lukasiewicz, Tadeusz;Dec, Jan;Berenov, Andrey;Alford, Neil McN;
7:1:2:47     Pyroelectric and electrocaloric effect of < 1 1 1 >-oriented 0.9PMN-0.1PT single crystal
DOI:10.1016/j.jallcom.2011.05.111  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:21  AU: Luo, Laihui;Chen, Hongbing;Zhu, Yuejin;Li, Weiping;Luo, Haosu;Zhang, Yuepin;
7:1:2:48     Electro-caloric effect in relaxor and ferroelectric compositions of Pb(Mg(1-x)/3Nb2(1-x)/3Zrx)O-3 ceramics
DOI:10.1016/j.jallcom.2012.01.130  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:14  AU: Singh, Gurvinderjit;Tiwari, V. S.;
7:1:2:49     Effect of domain walls on the electrocaloric properties of Pb(Zr1-x,Ti-x)O-3 thin films
DOI:10.1063/1.3614453  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:16  AU: Karthik, J.;Martin, L. W.;
7:1:2:50     The Electrocaloric Efficiency of Ceramic and Polymer Films
DOI:10.1002/adma.201300606  JN:ADVANCED MATERIALS  PY:2013
  TC:18  AU: Defay, Emmanuel;Crossley, Sam;Kar-Narayan, Sohini;Moya, Xavier;Mathur, Neil D.;
7:1:2:51     Differential scanning calorimeter and infrared imaging for electrocaloric characterization of poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer
DOI:10.1063/1.4734924  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Sebald, Gael;Seveyrat, Laurence;Capsal, Jean-Fabien;Cottinet, Pierre-Jean;Guyomar, Daniel;
7:1:2:52     Direct characterization of the electrocaloric effects in thin films supported on substrates
DOI:10.1063/1.4816333  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Jia, Yanbing;Ju, Y. Sungtaek;
7:1:2:53     Enhanced Electrocaloric Effects in Spark Plasma-Sintered Ba0.65Sr0.35TiO3-Based Ceramics at Room Temperature
DOI:10.1111/jace.12219  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Liu, Xiao Qiang;Chen, Ting Ting;Wu, Yong Jun;Chen, Xiang Ming;
7:1:2:54     Electrocaloric temperature change constrained by the dielectric strength
DOI:10.1016/j.matchemphys.2012.08.059  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:10  AU: Valant, Matjaz;Axelsson, Anna-Karin;Le Goupil, Florian;Alford, Neil McN.;
7:1:2:55     Electrocaloric effect in ferroelectric polymers
DOI:10.1007/s00339-012-6830-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:9  AU: Lu, S. G.;Rozic, B.;Zhang, Q. M.;Kutnjak, Z.;Pirc, R.;
7:1:2:56     Intrinsic electrocaloric effects in ferroelectric poly(vinylidene fluoride-trifluoroethylene) copolymers: Roles of order of phase transition and stresses
DOI:10.1063/1.3353989  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:25  AU: Li, B.;Ren, W. J.;Wang, X. W.;Meng, H.;Liu, X. G.;Wang, Z. J.;Zhang, Z. D.;
7:1:2:57     Orientation and phase transition dependence of the electrocaloric effect in 0.71PbMg(1/3)Nb(2/3)O(3)-0.29PbTiO(3) single crystal
DOI:10.1063/1.4745185  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Luo, Laihui;Dietze, Matthias;Solterbeck, Claus-Henning;Es-Souni, Mohammed;Luo, Haosu;
7:1:2:58     Enhanced electrocaloric effect in poly(vinylidene fluoride-trifluoroethylene)-based terpolymer/copolymer blends
DOI:10.1063/1.4722932  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Chen, Xiang-zhong;Qian, Xiao-shi;Li, Xinyu;Lu, S. G.;Gu, Hai-ming;Lin, Minren;Shen, Qun-dong;Zhang, Q. M.;
7:1:2:59     Electro-caloric effect in lead-free Sn doped BaTiO3 ceramics at room temperature and low applied fields
DOI:10.1063/1.4896044  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Upadhyay, Sanjay Kumar;Reddy, V. Raghavendra;Bag, Pallab;Rawat, R.;Gupta, S. M.;Gupta, Ajay;
7:1:2:60     Doubling the electrocaloric cooling of poled ferroelectric materials by bipolar cycling
DOI:10.1063/1.4892358  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Basso, Vittorio;Gerard, Jean-Francois;Pruvost, Sebastien;
7:1:2:61     Kinetic electrocaloric effect and giant net cooling of lead-free ferroelectric refrigerants
DOI:10.1063/1.3511342  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:14  AU: Bai, Yang;Zheng, Guang-Ping;Shi, San-Qiang;
7:1:2:62     Multicaloric effect in ferroelectric PbTiO3 from first principles
DOI:10.1103/PhysRevB.87.224101  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Lisenkov, S.;Mani, B. K.;Chang, C. -M.;Almand, J.;Ponomareva, I.;
7:1:2:63     Anisotropy of the Electrocaloric Effect in Lead-Free Relaxor Ferroelectrics
DOI:10.1002/aenm.201301688  JN:ADVANCED ENERGY MATERIALS  PY:2014
  TC:0  AU: Le Goupil, Florian;Axelsson, Anna-Karin;Dunne, Lawrence J.;Valant, Matjaz;Manos, George;Lukasiewicz, Tadeusz;Dec, Jan;Berenov, Andrey;Alford, Neil McN;
7:1:2:64     Large Electrocaloric Effect in a Dielectric Liquid Possessing a Large Dielectric Anisotropy Near the Isotropic-Nematic Transition
DOI:10.1002/adfm.201202686  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:10  AU: Qian, Xiao-Shi;Lu, Sheng-Guo;Li, Xinyu;Gu, Haiming;Chien, Liang-Chy;Zhang, Qiming;
7:1:2:65     Maximizing the number of coexisting phases near invariant critical points for giant electrocaloric and electromechanical responses in ferroelectrics
DOI:10.1063/1.4747275  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Liu, Z. K.;Li, Xinyu;Zhang, Q. M.;
7:1:2:66     Direct Measurements of the Giant Electrocaloric Effect in Soft and Solid Ferroelectric Materials
DOI:10.1080/00150193.2010.482884  JN:FERROELECTRICS  PY:2010
  TC:21  AU: Rozic, B.;Malic, B.;Ursic, H.;Holc, J.;Kosec, M.;Neese, B.;Zhang, Q. M.;Kutnjak, Z.;
7:1:2:67     Room temperature electrocaloric effect on PbZr0.8Ti0.2O3 thin film
DOI:10.1063/1.3280031  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:22  AU: Li, B.;Wang, J. B.;Zhong, X. L.;Wang, F.;Zhou, Y. C.;
7:1:2:68     Giant elastocaloric effect in ferroelectric Ba0.5Sr0.5TiO3 alloys from first-principles
DOI:10.1103/PhysRevB.86.104103  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Lisenkov, S.;Ponomareva, I.;
7:1:2:69     Intrinsic electrocaloric effect in ultrathin ferroelectric capacitors
DOI:10.1063/1.4711213  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Liu, Yang;Peng, Xing-ping;Lou, Xiaojie;Zhou, Hu;
7:1:2:70     Effect of surface tension on electrocaloric effects in the ferroelectric nanomaterial with vortex domain structures
DOI:10.1063/1.4813508  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Li, B.;Wang, J. B.;Zhong, X. L.;Wang, F.;Wang, L. J.;Zhou, Y. C.;
7:1:2:71     Tailoring electrically induced properties by stretching relaxor polymer films
DOI:10.1063/1.4704364  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Bobnar, V.;Li, X.;Casar, G.;Erste, A.;Glinsek, S.;Qian, X.;Zhang, Q. M.;
7:1:2:72     Ferroelectric behavior in the high temperature paraelectric phase in a poly(vinylidene fluoride-co-trifluoroethylene) random copolymer
DOI:10.1016/j.polymer.2012.01.001  JN:POLYMER  PY:2012
  TC:7  AU: Su, Run;Tseng, Jung-Kai;Lu, Mao-Sheng;Lin, Minren;Fu, Qiang;Zhu, Lei;
7:1:2:73     A nanocomposite approach to tailor electrocaloric effect in ferroelectric polymer
DOI:10.1016/j.polymer.2013.07.052  JN:POLYMER  PY:2013
  TC:4  AU: Chen, Xiang-Zhong;Li, Xinyu;Qian, Xiao-Shi;Lin, Minren;Wu, Shan;Shen, Qun-Dong;Zhang, Q. M.;
7:1:2:74     The electrocaloric effect around the orthorhombic-tetragonal first-order phase transition in BaTiO3
DOI:10.1063/1.4732146  JN:AIP ADVANCES  PY:2012
  TC:7  AU: Bai, Yang;Ding, Kai;Zheng, Guang-Ping;Shi, San-Qiang;Cao, Jiang-Li;Qiao, Lijie;
7:1:2:75     Electrocaloric effect in low-crystallinity ferroelectric polymers
DOI:10.1063/1.3702781  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Moreira, R. L.;
7:1:2:76     Microscopic interpretation of sign reversal in the electrocaloric effect in a ferroelectric PbMg1/3Nb2/3O3-30PbTiO(3) single crystal
DOI:10.1063/1.4794543  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Axelsson, A. -K.;Le Goupil, F.;Dunne, L. J.;Manos, G.;Valant, M.;Alford, N. McN.;
7:1:2:77     Electrocaloric characterization of a poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer by infrared imaging
DOI:10.1063/1.4890676  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Guo, Dongzhi;Gao, Jinsheng;Yu, Ying-Ju;Santhanam, Suresh;Fedder, Gary K.;McGaughey, Alan J. H.;Yao, S. C.;
7:1:2:78     Characterization of the electrocaloric effect and hysteresis loss in relaxor ferroelectric thin films under alternating current bias fields
DOI:10.1063/1.4885715  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Jia, Yanbing;Ju, Y. Sungtaek;
7:1:2:79     Dynamic temperature response of electrocaloric multilayer capacitors
DOI:10.1063/1.4875023  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kwon, Beomjin;Roh, Im-Jun;Baek, Seung-Hyub;Kim, Seong Keun;Kim, Jin-Sang;Kang, Chong-Yun;
7:1:2:80     An electrocaloric refrigerator without external regenerator
DOI:10.1063/1.4898812  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Gu, Haiming;Qian, Xiao-Shi;Ye, Hui-Jian;Zhang, Q. M.;
7:1:2:81     Enhanced electrocaloric effect in lead-free NBT-based ceramics
DOI:10.1016/j.ceramint.2014.01.149  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:8  AU: Cao, W. P.;Li, W. L.;Xu, D.;Hou, Y. F.;Wang, W.;Fei, W. D.;
7:1:2:82     Experimentally validated finite element model of electrocaloric multilayer ceramic structures
DOI:10.1063/1.4891298  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Smith, N. A. S.;Rokosz, M. K.;Correia, T. M.;
7:1:2:83     A polymer blend approach to tailor the ferroelectric responses in P(VDF-TrFE) based copolymers
DOI:10.1016/j.polymer.2013.02.041  JN:POLYMER  PY:2013
  TC:7  AU: Chen, Xiang-Zhong;Li, Xinyu;Qian, Xiao-Shi;Wu, Shan;Lu, Sheng-Guo;Gu, Hai-Ming;Lin, Minren;Shen, Qun-Dong;Zhang, Q. M.;
7:1:2:84     Electrocaloric properties of epitaxial strontium titanate films
DOI:10.1063/1.4721668  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Zhang, J.;Misirlioglu, I. B.;Alpay, S. P.;Rossetti, G. A., Jr.;
7:1:2:85     Electrocaloric properties of ferroelectric-paraelectric superlattices controlled by the thickness of paraelectric layer in a wide temperature range
DOI:10.1063/1.4900858  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Ma, D. C.;Lin, S. P.;Chen, W. J.;Zheng, Yue;Wang, Biao;Xiong, W. M.;
7:1:2:86     Electrocaloric effect in BaTiO3: A first-principles-based study on the effect of misfit strain
DOI:10.1063/1.4879840  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Marathe, Madhura;Ederer, Claude;
7:1:2:87     Temperature-electric field hysteresis loop of electrocaloric effect in ferroelectricity-Direct measurement and analysis of electrocaloric effect. I
DOI:10.1063/1.4801997  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Wang, Jinfei;Yang, Tongqing;Wei, Kun;Yao, Xi;
7:1:2:88     The Electrocaloric Effect in Lead-Free K0.5Na0.5NbO3-SrTiO3 Ceramics
DOI:10.1080/00150193.2013.820996  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Rozic, B.;Koruza, J.;Kutnjak, Z.;Cordoyiannis, G.;Malic, B.;Kosec, M.;
7:1:2:89     Unification of the negative electrocaloric effect in Bi1/2Na1/2TiO3-BaTiO3 solid solutions by Ba1/2Sr1/2TiO3 doping
DOI:10.1063/1.4842935  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Uddin, Sarir;Zheng, Guang-Ping;Iqbal, Yaseen;Ubic, Rick;Yang, Junhe;
7:1:2:90     Electrical and thermal properties of vinylidene fluoride-trifluoroethylene-based polymer system with coexisting ferroelectric and relaxor states
DOI:10.1007/s10853-013-7602-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:2  AU: Casar, Goran;Li, Xinyu;Koruza, Jurij;Zhang, Qiming;Bobnar, Vid;
7:1:2:91     Large electrocaloric effect induced by the multi-domain to mono-domain transition in ferroelectrics
DOI:10.1063/1.4873112  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Wang, Jie;Liu, Man;Zhang, Yajun;Shimada, Takahiro;Shi, San-Qiang;Kitamura, Takayuki;
7:1:2:92     Large electrocaloric effect of highly (100)-oriented 0.68PbMg(1/3)Nb(2/3)O(3)-0.32PbTiO(3) thin films with a Pb(Zr0.3Ti0.7)O-3/PbOx buffer layer
DOI:10.1016/j.tsf.2011.02.069  JN:THIN SOLID FILMS  PY:2011
  TC:14  AU: Feng, Zuyong;Shi, Dongqi;Zeng, Rong;Dou, Shixue;
7:1:2:93     Theoretical investigation on polar dielectric with large electrocaloric effect as cooling devices
DOI:10.1063/1.3655327  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Liu, Liwu;Liu, Yanju;Li, Bo;Leng, Jinsong;
7:1:2:94     From mesoscopic to global polar order in the uniaxial relaxor ferroelectric Sr0.8Ba0.2Nb2O6
DOI:10.1063/1.3680599  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Dec, J.;Kleemann, W.;Shvartsman, V. V.;Lupascu, D. C.;Lukasiewicz, T.;
7:1:2:95     Finite-element optimisation of electrocaloric multilayer capacitors
DOI:10.1063/1.4866256  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Crossley, S.;McGinnigle, J. R.;Kar-Narayan, S.;Mathur, N. D.;
7:1:2:96     Aspects of the Electrocaloric Behavior of Ferroelectric Thin Films: A Review of the Predictions of the Landau-Ginzburg Theory
DOI:10.1080/10584587.2011.574486  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:3  AU: Zhang, J.;Heitmann, A. A.;Alpay, S. P.;Rossetti, G. A., Jr.;
7:1:2:97     Direct Measurements of the Electrocaloric Effect In Substrate-Free PMN-0.35pt Thick Films on a Platinum Layer
DOI:10.1080/10584587.2012.741903  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:5  AU: Rozic, B.;Ursic, H.;Holc, J.;Kosec, M.;Kutnjak, Z.;
7:1:2:98     Nonadiabatic direct measurement electrocaloric effect in lead-free Ba,Ca(Zr,Ti)O-3 ceramics
DOI:10.1016/j.jallcom.2012.10.144  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:9  AU: Wang, Jinfei;Yang, Tongqing;Chen, Shengchen;Li, Gang;Zhang, Qingfeng;Yao, Xi;
7:1:2:99     Sizable electrocaloric effect in a wide temperature range tuned by tensile misfit strain in BaTiO3 thin films
DOI:10.1063/1.3596814  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Zhang, X.;Wang, J. B.;Li, B.;Zhong, X. L.;Lou, X. J.;Zhou, Y. C.;
7:1:2:100     Enhanced ferroism in mechanically processed and environmentally friendly Ba0.30Na0.70Ti0.30Nb0.70O3 ceramics
DOI:10.1016/j.scriptamat.2011.12.031  JN:SCRIPTA MATERIALIA  PY:2012
  TC:2  AU: Zampiere, R. B.;Dias, G. S.;Cotica, L. F.;Santos, I. A.;
7:1:2:101     Simulation of chip-size electrocaloric refrigerator with high cooling-power density
DOI:10.1063/1.4796184  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Gu, Haiming;Craven, Brent;Qian, Xiaoshi;Li, Xinyu;Cheng, Ailan;Zhang, Q. M.;
7:1:2:102     Electrocaloric Effect and Dipolar Entropy Change in Ferroelectric Polymers
DOI:10.1080/00150193.2012.671101  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Pirc, R.;Rozic, B.;Kutnjak, Z.;Blinc, R.;Li, Xinyu;Zhang, Q. M.;
7:1:2:103     Electrocaloric Effect in gamma-Irradiated P(VDF-TrFE) Copolymers with Relaxor Features
DOI:10.1080/00150193.2013.820971  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Moreira, R. L.;
7:1:2:104     Electrocaloric Effect in Ferroelectric P(VDF-TrFE) Copolymers
DOI:10.1080/10584587.2011.574491  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:9  AU: Lu, S. G.;Rozic, B.;Kutnjak, Z.;Zhang, Q. M.;
7:1:2:105     Characteristics and dielectric properties of (Pb0.97-xLa0.02Bax)(Zr0.72Sn0.22Ti0.06)O-3 ceramics
DOI:10.1016/j.jallcom.2012.06.028  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Wang Jinfei;Yang Tongqing;Chen Shengchen;Li Gang;Yao Xi;
7:1:2:106     Influencing dielectric properties of relaxor polymer system by blending vinylidene fluoride-trifluoroethylene-based terpolymer with a ferroelectric copolymer
DOI:10.1063/1.4867978  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Casar, G.;Li, X.;Zhang, Q. M.;Bobnar, V.;
7:1:2:107     Electric field dependence of the Curie temperature of ferroelectric poly(vinylidenefluoride-trifluoroethylene) co-polymers for pyroelectric energy harvesting
DOI:10.1088/0964-1726/21/2/022001  JN:SMART MATERIALS & STRUCTURES  PY:2012
  TC:9  AU: Cha, Gilhwan;Ju, Y. Sungtaek;
7:1:2:108     Origin of pyroelectricity in LiNbO3
DOI:10.1103/PhysRevB.83.220103  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Peng, Qing;Cohen, R. E.;
7:1:2:109     Electric-field tunable electrocaloric effects from phase transition between antiferroelectric and ferroelectric phase
DOI:10.1063/1.4862171  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Hao, Xihong;Zhai, Jiwei;
7:1:2:110     Electrocaloric Materials for Cooling Applications
DOI:10.1080/00150193.2012.678147  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Kar-Narayan, S.;Mathur, N. D.;
7:1:2:111     The Giant Electrocaloric Effect in Inorganic and Organic Ferroelectric Relaxor Systems
DOI:10.1080/00150193.2012.677726  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Rozic, B.;Malic, B.;Ursic, H.;Holc, J.;Kosec, M.;Lu, S. -G.;Zhang, Q. M.;Kutnjak, Z.;
7:1:2:112     Electrocaloric Response in Substrate-Free PMN-0.30PT Thick Films
DOI:10.1080/00150193.2014.893166  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Rozic, B.;Ursic, H.;Vrabelj, M.;Holc, J.;Malic, B.;Kutnjak, Z.;
7:1:2:113     Effective Hamiltonian methods for predicting the electrocaloric behavior of BaTiO3
DOI:10.1016/j.matlet.2012.08.102  JN:MATERIALS LETTERS  PY:2012
  TC:9  AU: Beckman, S. P.;Wan, L. F.;Barr, Jordan A.;Nishimatsu, Takeshi;
7:1:2:114     Decoupling electrocaloric effect from Joule heating in a solid state cooling device
DOI:10.1063/1.3665949  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Quintero, M.;Ghivelder, L.;Gomez-Marlasca, F.;Parisi, F.;
7:1:2:115     Direct Measurements of the Electrocaloric Effect in Bulk PbMg1/3Nb2/3O3 (PMN) Ceramics
DOI:10.1080/00150193.2011.594742  JN:FERROELECTRICS  PY:2011
  TC:6  AU: Rozic, B.;Malic, B.;Ursic, H.;Holc, J.;Kosec, M.;Kutnjak, Z.;
7:1:2:116     Direct Measurements of the Electrocaloric Effect in P(VDF-TrFE) (68/32) Copolymer Ferroelectric Films
DOI:10.1080/00150193.2011.577988  JN:FERROELECTRICS  PY:2011
  TC:6  AU: Rozic, B.;Neese, B.;Lu, S. -G.;Zhang, Q. M.;Kutnjak, Z.;
7:1:2:117     Investigations of Cooling Efficiencies in Solid-State Electrocaloric Device
DOI:10.1080/10584587.2012.660852  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:3  AU: Chukka, Rami;Shannigrahi, Santirajan;Chen, Lang;
7:1:2:118     Effect of Electric Field on Ferroelectric Phase Transition in BaTiO3 Ferroelectric
DOI:10.1080/15421406.2014.948776  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Novak, N.;Pirc, R.;Kutnjak, Z.;
7:1:2:119     High Electrocaloric Effect in Ferroelectrics
DOI:10.1080/00150193.2010.505854  JN:FERROELECTRICS  PY:2010
  TC:6  AU: Birks, E.;Dunce, M.;Sternberg, A.;
7:1:2:120     Electrocaloric and Barocaloric Effects in Some Ferroelectric Hydrosulfates and Triglycinesulfate
DOI:10.1080/00150193.2012.677717  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Mikhaleva, E. A.;Flerov, I. N.;Bondarev, V. S.;Gorev, M. V.;Vasiliev, A. D.;Davydova, T. N.;
7:1:2:121     Electrocaloric Effect in the Relaxor Ferroelectric Terpolymer P(VDF-TrFE-CFE)
DOI:10.1080/00150193.2011.594743  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Rozic, B.;Lu, S. G.;Kutnjak, Z.;Neese, B.;Zhang, Q. M.;
7:1:2:122     Barocaloric Effect in Oxyfluorides Rb2KTiOF5 and (NH4)(2)NbOF5
DOI:10.1080/00150193.2010.484722  JN:FERROELECTRICS  PY:2010
  TC:9  AU: Gorev, M. V.;Bogdanov, E. V.;Flerov, I. N.;Voronov, V. N.;Laptash, N. M.;
7:1:2:123     Investigation of the electrocaloric effect in a PbMg1/3Nb2/3O3-PbTiO3 relaxor thin film (vol 95, 182904, 2009)
DOI:10.1063/1.3486475  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:1  AU: Correia, T. M.;Young, J. S.;Whatmore, R. W.;Scott, J. F.;Mathur, N. D.;Zhang, Q.;
7:1:2:124     Performance enhancement of cylindrical ferroelectric transducers
DOI:10.1016/j.ceramint.2013.05.107  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Mohammadi, Saber;Khodayari, Akram;Mohammadi, Pouria;
7:1:2:125     B3LYP investigation of response properties of alkali halides on external static electric fields
DOI:10.1016/j.commatsci.2011.04.006  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2011
  TC:2  AU: Praveen, C. S.;Kokalj, A.;Valant, M.;
7:1:2:126     Solid-State Cooler: New Opportunities
DOI:10.1080/00150193.2012.677730  JN:FERROELECTRICS  PY:2012
  TC:7  AU: Starkov, Alexander;Pakhomov, Oleg;Starkov, Ivan;
7:1:2:127     Electrocaloric Effect in 0.85PMN-0.15PT Thin Films Deposited by Pulsed Laser Deposition
DOI:10.1080/00150193.2013.842091  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Saranya, D.;Parui, Jayanta;Krupanidhi, S. B.;
7:1:2:128     Ferroelectric phase transition effect of doping trifluoroethylene monomer in poly(vinylidene fluoride)
DOI:10.1063/1.4880296  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Li, Dan;Xiong, Jinwen;Guo, Yuqi;Li, Gao;
7:1:2:129     Giant Electrocaloric Effect Around T-c (vol 109, 187604, 2012)
DOI:10.1103/PhysRevLett.109.209903  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:0  AU: Rose, Maimon C.;Cohen, R. E.;
7:1:2:130     Giant Electrocaloric Effect Around T-c (vol 109, 187604, 2012)
DOI:10.1103/PhysRevLett.112.249901  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Rose, Maimon C.;Cohen, R. E.;
7:1:3:1     High performance ferroelectric relaxor-PbTiO3 single crystals: Status and perspective
DOI:10.1063/1.3679521  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:141  AU: Zhang, Shujun;Li, Fei;
7:1:3:2     Decoding the Fingerprint of Ferroelectric Loops: Comprehension of the Material Properties and Structures
DOI:10.1111/jace.12773  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:50  AU: Jin, Li;Li, Fei;Zhang, Shujun;
7:1:3:3     Relaxor-based ferroelectric single crystals: Growth, domain engineering, characterization and applications
DOI:10.1016/j.pmatsci.2014.03.006  JN:PROGRESS IN MATERIALS SCIENCE  PY:2014
  TC:27  AU: Sun, Enwei;Cao, Wenwu;
7:1:3:4     Critical Property in Relaxor-PbTiO3 Single Crystals - Shear Piezoelectric Response
DOI:10.1002/adfm.201002711  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:47  AU: Li, Fei;Zhang, Shujun;Xu, Zhuo;Wei, Xiaoyong;Shrout, Thomas R.;
7:1:3:5     Composition and phase dependence of the intrinsic and extrinsic piezoelectric activity of domain engineered (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) crystals
DOI:10.1063/1.3466978  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:67  AU: Li, Fei;Zhang, Shujun;Xu, Zhuo;Wei, Xiaoyong;Luo, Jun;Shrout, Thomas R.;
7:1:3:6     Ferroelastic aspects of relaxor ferroelectric behaviour in Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 perovskite
DOI:10.1063/1.4794027  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Nataf, Guillaume F.;Li, Qian;Liu, Yun;Withers, Ray L.;Driver, Sarah L.;Carpenter, Michael A.;
7:1:3:7     Elastic, dielectric, and piezoelectric constants of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystal poled along [011](c)
DOI:10.1063/1.3466906  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:32  AU: Sun, Enwei;Zhang, Shujun;Luo, Jun;Shrout, Thomas R.;Cao, Wenwu;
7:1:3:8     A complete set of material properties of single domain 0.26Pb(In1/2Nb1/2)O-3-0.46Pb(Mg1/3Nb2/3)O-3-0.28PbTiO(3) single crystals
DOI:10.1063/1.3275803  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:30  AU: Liu, Xiaozhou;Zhang, Shujun;Luo, Jun;Shrout, Thomas R.;Cao, Wenwu;
7:1:3:9     Characterization of single domain Pb(In0.5Nb0.5)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 crystals with monoclinic phase
DOI:10.1063/1.3639316  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:23  AU: Zhang, Shujun;Liu, Gang;Jiang, Wenhua;Luo, Jun;Cao, Wenwu;Shrout, Thomas R.;
7:1:3:10     Electromechanical properties of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1063/1.3530617  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:26  AU: Li, Fei;Zhang, Shujun;Lin, Dabin;Luo, Jun;Xu, Zhuo;Wei, Xiaoyong;Shrout, Thomas R.;
7:1:3:11     Temperature dependence of electric-field-induced domain switching in 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) single crystal
DOI:10.1016/j.jallcom.2012.02.159  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:11  AU: Wang, Zhu;Zhang, Rui;Sun, Enwei;Cao, Wenwu;
7:1:3:12     Electromechanical properties of tetragonal Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 ferroelectric crystals
DOI:10.1063/1.3331407  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:24  AU: Li, Fei;Zhang, Shujun;Xu, Zhuo;Wei, Xiaoyong;Luo, Jun;Shrout, Thomas R.;
7:1:3:13     Composition and orientation dependence of high electric-field-induced strain in Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1063/1.4770362  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: He, Chongjun;Chen, Hongbing;Bai, Fei;Fan, Zhibin;Sun, Liang;Xu, Feng;Wang, Jiming;Liu, Youwen;Zhu, Kongjun;
7:1:3:14     Phase transition behaviors in relaxor ferroelectric [001]-poled Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals studied by Brillouin light scattering and dielectric spectroscopies
DOI:10.1063/1.3692596  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Kim, Tae Hyun;Kojima, Seiji;Ko, Jae-Hyeon;
7:1:3:15     Temperature independent shear piezoelectric response in relaxor-PbTiO3 based crystals
DOI:10.1063/1.3529952  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:18  AU: Li, Fei;Zhang, Shujun;Xu, Zhuo;Wei, Xiaoyong;Luo, Jun;Shrout, Thomas R.;
7:1:3:16     The compositional segregation, phase structure and properties of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystal
DOI:10.1016/j.jcrysgro.2010.11.045  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:25  AU: Zhang, Yaoyao;Li, Xiaobing;Liu, Daan;Zhang, Qinhui;Wang, Wei;Ren, Bo;Lin, Di;Zhao, Xiangyong;Luo, Haosu;
7:1:3:17     Phase diagram and properties of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 polycrystalline ceramics
DOI:10.1016/j.jeurceramsoc.2011.08.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:22  AU: Wang, Dawei;Cao, Maosheng;Zhang, Shujun;
7:1:3:18     A method based on optical and atomic force microscopes for instant imaging of non-homogeneous electro-mechanical processes and direct estimation of d(ij) coefficients in piezoelectric materials at the local level
DOI:10.1016/j.jallcom.2014.05.212  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Stamopoulos, D.;Zhang, S. J.;
7:1:3:19     Degradation of the remanent ferromagnetic state under the action of ferroelectric relaxation processes in Co/(1-x)PMN-xPT/Co hybrids: Possible implications on cryogenic and room-temperature applications
DOI:10.1063/1.4893957  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Stamopoulos, D.;Zeibekis, M.;Vertsioti, G.;Zhang, S. J.;
7:1:3:20     Electromechanical properties and anisotropy of single- and multi-domain 0.72Pb(Mg1/3Nb2/3)O-3-0.28PbTiO(3) single crystals
DOI:10.1063/1.3652703  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: Liu, Gang;Jiang, Wenhua;Zhu, Jiaqi;Cao, Wenwu;
7:1:3:21     Characterization and piezoelectric thermal stability of PIN-PMN-PT ternary ceramics near the morphotropic phase boundary
DOI:10.1016/j.jallcom.2009.09.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:23  AU: Lin, Dabin;Li, Zhenrong;Li, Fei;Xu, Zhuo;Yao, Xi;
7:1:3:22     Investigation of Electromechanical Properties and Related Temperature Characteristics in Domain-Engineered Tetragonal Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 Crystals
DOI:10.1111/j.1551-2916.2010.03760.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:20  AU: Li, Fei;Zhang, Shujun;Xu, Zhuo;Wei, Xiaoyong;Luo, Jun;Shrouty, Thomas R.;
7:1:3:23     Measurements of face shear properties in relaxor-PbTiO3 single crystals
DOI:10.1063/1.3638691  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:17  AU: Zhang, Shujun;Jiang, Wenhua;Meyer, Richard J., Jr.;Li, Fei;Luo, Jun;Cao, Wenwu;
7:1:3:24     Study of phase transitions in ternary lead indium niobate-lead magnesium niobate-lead titanate relaxor ferroelectric morphotropic single crystals
DOI:10.1063/1.3491218  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Finkel, Peter;Robinson, Harold;Stace, Joseph;Amin, Ahmed;
7:1:3:25     The Growth and Properties of Relaxor-Based Ferroelectric Single Crystals
DOI:10.1111/j.1551-2916.2010.04107.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:33  AU: Li, Xiaobing;Luo, Haosu;
7:1:3:26     Improved thermal stability of [001](c) poled 0.24Pb(In1/2Nb1/2)O-3-0.47Pb (Mg1/3Nb2/3)O-3-0.29PbTiO(3) single crystal with manganese doping
DOI:10.1016/j.jallcom.2014.02.174  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Wang, Yuling;Sun, Enwei;Song, Wei;Li, Wanchong;Zhang, Rui;Cao, Wenwu;
7:1:3:27     Thickness-Dependent Properties of Relaxor-PbTiO3 Ferroelectrics for Ultrasonic Transducers
DOI:10.1002/adfm.201000390  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:32  AU: Lee, Hyeongjae;Zhang, Shujun;Luo, Jun;Li, Fei;Shrout, Thomas R.;
7:1:3:28     Face shear piezoelectric properties of relaxor-PbTiO3 single crystals
DOI:10.1063/1.3584851  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: Zhang, Shujun;Li, Fei;Jiang, Wenhua;Luo, Jun;Meyer, Richard J., Jr.;Cao, Wenwu;Shrout, Thomas R.;
7:1:3:29     Large strain transduction utilizing phase transition in relaxor-ferroelectric Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1063/1.3585088  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Finkel, Peter;Benjamin, Kim;Amin, Ahmed;
7:1:3:30     Piezoelectric activity of relaxor-PbTiO3 based single crystals and polycrystalline ceramics at cryogenic temperatures: Intrinsic and extrinsic contributions
DOI:10.1063/1.3430059  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Li, Fei;Zhang, Shujun;Xu, Zhuo;Wei, Xiaoyong;Luo, Jun;Shrout, Thomas R.;
7:1:3:31     Electrostrictive effect in Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) crystals
DOI:10.1063/1.4802792  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Li, Fei;Jin, Li;Xu, Zhuo;Wang, Dawei;Zhang, Shujun;
7:1:3:32     Investigation of single and multidomain Pb(In0.5Nb0.5)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 crystals with mm2 symmetry
DOI:10.1063/1.3494532  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Zhang, Shujun;Li, Fei;Luo, Jun;Xia, Ru;Hackenberger, Wesley;Shrout, Thomas R.;
7:1:3:33     An efficient way to enhance output strain for shear mode Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 crystals: Applying uniaxial stress perpendicular to polar direction
DOI:10.1063/1.4712129  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Li, Fei;Zhang, Shujun;Xu, Zhuo;Lin, Dabin;Gao, JunJie;Li, Zhenrong;Wang, Linghang;
7:1:3:34     PMN-PT based quaternary piezoceramics with enhanced piezoelectricity and temperature stability
DOI:10.1063/1.4875797  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Luo, Nengneng;Zhang, Shujun;Li, Qiang;Yan, Qingfeng;He, Wenhui;Zhang, Yiling;Shrout, Thomas R.;
7:1:3:35     Orientation dependence of piezoelectric properties and mechanical quality factors of 0.27Pb(In1/2Nb1/2)O-3-0.46Pb(Mg1/3Nb2/3)O-3-0.27PbTiO(3):Mn single crystals
DOI:10.1063/1.4821030  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Zheng, Limei;Sahul, Raffi;Zhang, Shujun;Jiang, Wenhua;Li, Shiyang;Cao, Wenwu;
7:1:3:36     Broadband inelastic light scattering study on relaxor ferroelectric Pb(In1/2Nb1/2)-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1063/1.4878855  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Kim, Tae Hyun;Kojima, Seiji;Ko, Jae-Hyeon;
7:1:3:37     Recent developments on high Curie temperature PIN-PMN-PT ferroelectric crystals
DOI:10.1016/j.jcrysgro.2010.11.043  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:12  AU: Zhang, Shujun;Li, Fei;Sherlock, Nevin P.;Luo, Jun;Lee, Hyeong Jae;Xia, Ru;Meyer, Richard J., Jr.;Hackenberger, Wesley;Shrout, Thomas R.;
7:1:3:38     Piezoelectric single crystal ultrasonic transducers for biomedical applications
DOI:10.1016/j.pmatsci.2014.06.001  JN:PROGRESS IN MATERIALS SCIENCE  PY:2014
  TC:4  AU: Zhou, Qifa;Lam, Kwok Ho;Zheng, Hairong;Qiu, Weibao;Shung, K. Kirk;
7:1:3:39     High-order face-shear modes of relaxor-PbTiO3 crystals for piezoelectric motor applications
DOI:10.1063/1.4884652  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Ci, Penghong;Liu, Guoxi;Chen, Zhijiang;Zhang, Shujun;Dong, Shuxiang;
7:1:3:40     Determination of full set material constants of [011](c) poled 0.72Pb(Mg1/3Nb2/3)O-3-0.28PbTiO(3) single crystal from one sample
DOI:10.1063/1.4886765  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Li, Shiyang;Zheng, Limei;Cao, Wenwu;
7:1:3:41     Preparation and Characterization of New Pb(Yb1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 Ternary Piezo-/Ferroelectric Crystals
DOI:10.1021/cm101626a  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:31  AU: He, Chao;Li, Xiuzhi;Wang, Zujian;Long, Xifa;Mao, Shaoyu;Ye, Zuo-Guang;
7:1:3:42     Large signal electromechanical properties of low loss (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) single crystals
DOI:10.1063/1.3359716  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:20  AU: Sherlock, Nevin P.;Zhang, Shujun;Luo, Jun;Lee, Ho-Yong;Shrout, Thomas R.;Meyer, Richard J., Jr.;
7:1:3:43     Complete set of elastic, dielectric, and piezoelectric constants of [011](C) poled rhombohedral Pb(In0.5Nb0.5)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3: Mn single crystals
DOI:10.1063/1.4792661  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:14  AU: Huo, Xiaoqing;Zhang, Shujun;Liu, Gang;Zhang, Rui;Luo, Jun;Sahul, Raffi;Cao, Wenwu;Shrout, Thomas R.;
7:1:3:44     Complete Set of Material Constants of < 011 >-Poled Rhombohedral Single-Crystal 0.25Pb(In1/2Nb1/2)O-3-0.47Pb(Mg1/3Nb2/3)O-3-0.28PbTiO(3)
DOI:10.1007/s11664-010-1390-2  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2011
  TC:13  AU: Zhang, Yaoyao;Liu, Da'an;Zhang, Qinhui;Wang, Wei;Ren, Bo;Zhao, Xiangyong;Luo, Haosu;
7:1:3:45     Domain Evolution in PbMg1/3Nb2/3O3-60at%PbTiO3 with Temperature and Electric Field
DOI:10.1111/j.1551-2916.2010.04380.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Yao, Jianjun;Yang, Yaodong;Ge, Wenwei;Li, Jiefang;Viehland, D.;
7:1:3:46     Tuning the functional properties of PMN-PT single crystals via doping and thermoelectrical treatments
DOI:10.1063/1.4847975  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Luo, Laihui;Dietze, Matthias;Solterbeck, Claus-Henning;Luo, Haosu;Es-Souni, Mohammed;
7:1:3:47     Temperature-induced and electric-field-induced phase transitions in rhombohedral Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 ternary single crystals
DOI:10.1103/PhysRevB.90.134107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wang, Yaojin;Wang, Zhiguang;Ge, Wenwei;Luo, Chengtao;Li, Jiefang;Viehland, D.;Chen, Jianwei;Luo, Haosu;
7:1:3:48     Phase transition characteristics of the relaxor-based 0.24PIN-0.51PMN-0.25PT single crystals
DOI:10.1016/j.jallcom.2013.01.034  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Wan, Yuhui;Li, Zhenrong;Xu, Zhuo;Fan, Shiji;Yao, Xi;
7:1:3:49     High-Performance Ferroelectric Solid Solution Crystals: Pb(In1/2Nb1/2)O-3-Pb(Zn1/3Nb2/3)O-3-PbTiO3
DOI:10.1111/jace.13035  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Li, Tao;Long, Xifa;
7:1:3:50     Elastic, dielectric and piezoelectric characterization of single domain PIN-PMN-PT: Mn crystals
DOI:10.1063/1.4772617  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Huo, Xiaoqing;Zhang, Shujun;Liu, Gang;Zhang, Rui;Luo, Jun;Sahul, Raffi;Cao, Wenwu;Shrout, Thomas R.;
7:1:3:51     Polarization fatigue in Pb(In0.5Nb0.5)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1016/j.actamat.2010.03.018  JN:ACTA MATERIALIA  PY:2010
  TC:17  AU: Zhang, Shujun;Luo, Jun;Li, Fei;Meyer, Richard J., Jr.;Hackenberger, Wesley;Shrout, Thomas R.;
7:1:3:52     Domain size engineering in tetragonal Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 crystals
DOI:10.1063/1.3654137  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Lin, Dabin;Zhang, Shujun;Li, Zhenrong;Li, Fei;Xu, Zhuo;Wada, Satoshi;Luo, Jun;Shrout, Thomas R.;
7:1:3:53     Giant electro-mechanical energy conversion in [011] cut ferroelectric single crystals
DOI:10.1063/1.3679644  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:17  AU: Dong, Wen D.;Finkel, Peter;Amin, Ahmed;Lynch, Christopher S.;
7:1:3:54     Dielectric and piezoelectric activities in (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) single crystals from 5 K to 300 K
DOI:10.1063/1.4716031  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Martin, Florian;ter Brake, H. J. M.;Lebrun, Laurent;Zhang, Shujun;Shrout, Thomas;
7:1:3:55     Complete set of material constants of single domain (K, Na)(Nb, Ta)O-3 single crystal and their orientation dependence
DOI:10.1063/1.4902548  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zheng, Limei;Li, Shiyang;Sang, Shijing;Wang, Junjun;Huo, Xiaoqing;Wang, Rui;Yuan, Zhongyuan;Cao, Wenwu;
7:1:3:56     Complete matrix properties of [001](c) and [011](c) poled 0.33Pb(In1/2Nb1/2)O-3-0.38Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) single crystals
DOI:10.1016/j.jallcom.2012.11.111  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:10  AU: Sun, Enwei;Zhang, Rui;Wu, Fengmin;Cao, Wenwu;
7:1:3:57     Thermal expansion and phase transition in [001]-oriented 0.69Pb(Mg1/3Nb2/3)O-3-0.31PbTiO(3) single crystal
DOI:10.1016/j.jallcom.2014.06.014  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Li, Xiaojuan;Liu, Peng;Xi, Zengzhe;Long, Wei;Fang, Pinyang;Zhao, Xiaogang;
7:1:3:58     Phase coexistence and transformations in field-cooled ternary piezoelectric single crystals near the morphotropic phase boundary
DOI:10.1063/1.4903476  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Luo, Chengtao;Wang, Yaojin;Wang, Zhiguang;Ge, Wenwei;Li, Jiefang;Luo, Haosu;Viehland, D.;
7:1:3:59     In-situ observation of domain wall motion in Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 crystals
DOI:10.1063/1.4890351  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Lin, Dabin;Li, Zhenrong;Li, Fei;Zhang, Shujun;Cai, Changlong;Cheng, Yaojin;Xu, Zhuo;
7:1:3:60     Influence of domain size on the scaling effects in Pb(Mg1/3Nb2/3)O-3-PbTiO3 ferroelectric crystals
DOI:10.1016/j.scriptamat.2011.03.018  JN:SCRIPTA MATERIALIA  PY:2011
  TC:12  AU: Lin, Dabin;Lee, Hyeong Jae;Zhang, Shujun;Li, Fei;Li, Zhenrong;Xu, Zhuo;Shrout, Thomas R.;
7:1:3:61     Enhanced piezoelectric activity and temperature stability of [111]-oriented orthorhombic 0.68Pb(Mg1/3Nb2/3) O-3-0.32PbTiO(3) single crystals by domain size engineering
DOI:10.1016/j.scriptamat.2013.10.004  JN:SCRIPTA MATERIALIA  PY:2014
  TC:2  AU: Shen, Zong-Yang;Tang, Yanxue;Zhang, Shujun;Luo, Jun;Li, Yueming;Shrout, Thomas R.;
7:1:3:62     Structural transitions in [001]/[111]-oriented 0.26Pb(In1/2Nb1/2) O-3-0.46Pb (Mg1/3Nb2/3) O-3-0.28PbTiO(3) single crystals probed via neutron diffraction and electrical characterization
DOI:10.1063/1.4802669  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Li, Qian;Liu, Yun;Wang, Jian;Studer, Andrew J.;Withers, Ray L.;Li, Zhenrong;Xu, Zhuo;
7:1:3:63     A face-shear mode single crystal ultrasonic motor
DOI:10.1063/1.4804627  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Li, Shiyang;Jiang, Wenhua;Zheng, Limei;Cao, Wenwu;
7:1:3:64     Characterization of full set material constants of piezoelectric materials based on ultrasonic method and inverse impedance spectroscopy using only one sample
DOI:10.1063/1.4821107  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Li, Shiyang;Zheng, Limei;Jiang, Wenhua;Sahul, Raffi;Gopalan, Venkatraman;Cao, Wenwu;
7:1:3:65     Temperature dependence of dielectric polarization and strain behaviors for rhombohedral PIMNT single crystal with different crystallographic orientations
DOI:10.1016/j.jallcom.2012.08.044  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Wang, Wei;Li, Xiaobing;Or, Siu Wing;Leung, Chung Ming;Jiao, Jie;Zhang, Yaoyao;Zhao, Xiangyong;Luo, Haosu;
7:1:3:66     Electric-field and temperature induced phase transitions in Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) single crystals
DOI:10.1063/1.3467774  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Lin, Dabin;Li, Zhenrong;Zhang, Shujun;Xu, Zhuo;Yao, Xi;
7:1:3:67     Variations of composition and dielectric properties of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystal along growth direction
DOI:10.1063/1.4798287  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Wan, Yuhui;Li, Zhenrong;Chen, Hongbing;Li, Fei;Xu, Zhuo;Fan, Shiji;Yao, Xi;
7:1:3:68     Stress dependence of thermally driven pyroelectric charge release during FER-FEO phase transformations in [011] cut relaxor ferroelectric crystals
DOI:10.1063/1.4731791  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Dong, Wen D.;Finkel, Peter;Amin, Ahmed;Lynch, Christopher S.;
7:1:3:69     Piezoelectric property of relaxor-PbTiO3 crystals under uniaxial transverse stress
DOI:10.1063/1.4803183  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Zhang, Shujun;Taylor, Samuel;Li, Fei;Luo, Jun;Meyer, Richard J., Jr.;
7:1:3:70     In-situ neutron diffraction study of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals under uniaxial mechanical stress
DOI:10.1063/1.4706563  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Li, Qian;Liu, Yun;Luzin, Vladimir;Studer, Andrew J.;Wan, Yuhui;Li, Zhengrong;Noren, Lasse;Withers, Ray L.;Xu, Zhuo;
7:1:3:71     The effect of polar nanoregions on electromechanical properties of relaxor-PbTiO3 crystals: Extracting from electric-field-induced polarization and strain behaviors
DOI:10.1063/1.4896578  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Fei;Xu, Zhuo;Zhang, Shujun;
7:1:3:72     Complete set of elastic, dielectric, and piezoelectric coefficients of [-101] poled 0.23Pb(In1/2Nb1/2O3)-0.45Pb(Mg1/3Nb2/3)O-3-0.32PbTiO(3) single crystals
DOI:10.1016/j.jallcom.2010.07.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Liu, Da'an;Zhang, Yaoyao;Wang, Wei;Ren, Bo;Zhang, Qinhui;Jiao, Jie;Zhao, Xiangyong;Luo, Haosu;
7:1:3:73     Dielectric, ultraviolet/visible, and Raman spectroscopic investigations of the phase transition sequence in 0.71Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) crystals
DOI:10.1103/PhysRevB.83.174115  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Katzke, H.;Dietze, M.;Lahmar, A.;Es-Souni, M.;Neumann, N.;Lee, S. -G.;
7:1:3:74     Hydrostatic piezoelectric properties of [011] poled Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals and 2-2 lamellar composites
DOI:10.1063/1.4862984  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Li, Lili;Zhang, Shujun;Xu, Zhuo;Geng, Xuecang;Wen, Fei;Luo, Jun;Shrout, Thomas R.;
7:1:3:75     Piezoelectric anisotropy of orthorhombic ferroelectric single crystals
DOI:10.1063/1.4809980  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Aleshin, V. I.;Raevski, I. P.;
7:1:3:76     The role of tetragonal side morphotropic phase boundary in modified relaxor-PbTiO3 crystals for high power transducer applications
DOI:10.1063/1.4824185  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Kong, Lingping;Liu, Gang;Zhang, Shujun;Liu, Haozhe;
7:1:3:77     Growth and characterization of lead-free ferroelectric (K,Na,Li)(Nb,Ta,Sb)O-3 single crystal
DOI:10.1016/j.jcrysgro.2014.09.041  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:1  AU: Wang, Junjun;Zheng, Limei;Yang, Bin;Wang, Rui;Huo, Xiaoqing;Sang, Shijing;Wu, Jie;Chang, Yunfei;Ning, Huanpo;Lv, Tianquan;Cao, Wenwu;
7:1:3:78     Elastic stability of high coupling ternary single crystals
DOI:10.1063/1.4804629  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Finkel, Peter;Murphy, Colin J.;Stace, Joseph;Bussmann, Konrad;Heitmann, Adam;Amin, Ahmed;
7:1:3:79     Effects of composition and temperature on the large field behavior of [011](C) relaxor ferroelectric single crystals
DOI:10.1063/1.4892451  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Gallagher, John A.;Tian, Jian;Lynch, Christopher S.;
7:1:3:80     Complete set of material properties of single domain 0.24Pb(In1/2Nb1/2)O-3-0.49Pb(Mg1/3Nb2/3)O-3-0.27PbTiO(3) single crystal and the orientation effects
DOI:10.1063/1.3615684  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Sun, Enwei;Cao, Wenwu;Jiang, Wenhua;Han, Pengdi;
7:1:3:81     Surface load induced electrical impedance shift in relaxor-PbTiO3 crystal piezoelectric resonators
DOI:10.1063/1.4729766  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Kim, Kyungrim;Zhang, Shujun;Jiang, Xiaoning;
7:1:3:82     Primary and secondary pyroelectric coefficients of rhombohedral and tetragonal single-domain relaxor-PbTiO3 single crystals
DOI:10.1063/1.4819086  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Tang, Yanxue;Zhang, Shujun;Shen, Zongyang;Jiang, Wenhua;Luo, Jun;Sahul, Raffi;Shrout, Thomas R.;
7:1:3:83     Optical interband transitions in [111] poled relaxor-based ferroelectric 0.24Pb(In1/2Nb1/2)O-3-(0.76-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) single crystal
DOI:10.1007/s10853-011-6110-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:9  AU: Wu, Fengmin;Yang, Bin;Sun, Enwei;Wang, Zhu;Yin, Yongqi;Pei, Yanbo;Yang, Wenlong;Cao, Wenwu;
7:1:3:84     Complete set of material properties of [011](c) poled 0.24Pb(In1/2Nb1/2)O-3-0.46Pb(Mg1/3Nb2/3)O-3-0.30PbTiO(3) single crystal
DOI:10.1016/j.matlet.2011.06.013  JN:MATERIALS LETTERS  PY:2011
  TC:8  AU: Sun, Enwei;Cao, Wenwu;Han, Pengdi;
7:1:3:85     Growth of the Relaxor Based Ferroelectric Single Crystals Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 by Vertical Bridgman Technique
DOI:10.1080/00150191003676405  JN:FERROELECTRICS  PY:2010
  TC:11  AU: Wang, Xian;Xu, Zhuo;Li, Zhenrong;Li, Fei;Chen, Hongbing;Fan, Shiji;
7:1:3:86     Growth and piezo-/ferroelectric properties of PIN-PMN-PT single crystals
DOI:10.1063/1.3681290  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Li, Xiuzhi;Wang, Zujian;He, Chao;Long, Xifa;Ye, Zuo-Guang;
7:1:3:87     Characterization of Pb(In1/2Nb1/2)O-3-PbTiO3 ferroelectric crystals grown by top-seeded solution growth method
DOI:10.1016/j.jallcom.2012.06.050  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: He, Chao;Li, Xiuzhi;Wang, Zujian;Liu, Ying;Shen, Dongquan;Li, Tao;Long, Xifa;
7:1:3:88     Bridgman growth, crystallographic characterization and electrical properties of relaxor-based ferroelectric single crystal PIMNT
DOI:10.1016/j.jallcom.2011.12.126  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:10  AU: Chen, Hongbing;Liang, Zhe;Luo, Laihui;Ke, Yiyang;Shen, Qi;Xia, Zongren;Jiang, Chengyong;Pan, Jianguo;
7:1:3:89     Characteristics of electric-field-induced polarization rotation in < 001 >-poled Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals close to the morphotropic phase boundary
DOI:10.1063/1.4745902  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Perantie, J.;Hagberg, J.;Uusimaki, A.;Tian, J.;Han, P.;
7:1:3:90     Enhanced dielectric, pyroelectric and ferroelectric properties of Mn-doped 0.15Pb(In1/2Nb1/2)O-3-0.55Pb(Mg1/3Nb2/3)O-3-0.30PbTiO(3) single crystals
DOI:10.1016/j.jallcom.2014.01.128  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Li, Long;Li, Xiaobing;Zhao, Xiangyong;Ren, Bo;Xu, Qing;Xu, Haiqing;Luo, Haosu;Li, Xin;Shao, Xiumei;
7:1:3:91     Phase Diagram and Properties of High T-C/TR-T Pb(In1/2Nb1/2) O-3-Pb(Zn1/3Nb2/3)O-3-PbTiO3 Ferroelectric Ceramics
DOI:10.1111/jace.12213  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Li, Tao;Li, Xiuzhi;Guo, Dong;Wang, Zujian;Liu, Ying;He, Chao;Chu, Tao;Ai, Liaodong;Pang, Dongfang;Long, Xifa;
7:1:3:92     Pyroelectric properties of rhombohedral and tetragonal Pb(In1/2Nb1/2)-Pb(Mg1/3Nb2/3)-PbTiO3 crystals
DOI:10.1063/1.3662951  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Gao, Junjie;Xu, Zhuo;Li, Fei;Zhang, Chonghui;Li, Zhenrong;Wu, Xiaoqing;Wang, Linghang;Liu, Yi;Liu, Gaomin;He, Hongliang;
7:1:3:93     Scaling effects of relaxor-PbTiO3 crystals and composites for high frequency ultrasound
DOI:10.1063/1.3437068  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Lee, Hyeong Jae;Zhang, Shujun;Shrout, Thomas R.;
7:1:3:94     Strain modulated magnetization and colossal resistivity of epitaxial La2/3Ca1/3MnO3 film on BaTiO3 substrate
DOI:10.1063/1.3633101  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Cheng, Z. X.;Wang, X. L.;Dou, S. X.;Osada, M.;Kimura, H.;
7:1:3:95     Origin of temperature independent piezoelectric coefficient in Pb(Mg1/3Nb2/3)O-3-BaTiO3-PbTiO3 ceramics
DOI:10.1063/1.4818964  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Huang, Lizhu;Bulou, Alain;Kassiba, Abdelhadi;Zeng, Jiangtao;Fu, Desheng;Errien, Nicolas;Zheng, Liaoying;Li, Guorong;
7:1:3:96     Inconsistencies of the complete sets of electromechanical constants of relaxor-ferroelectric single crystals
DOI:10.1063/1.3581117  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Topolov, V. Yu.;Bowen, C. R.;
7:1:3:97     Temperature dependence of dielectric and electromechanical properties of (K,Na)(Nb,Ta)O-3 single crystal and corresponding domain structure evolution
DOI:10.1063/1.4891718  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Zheng, Limei;Wang, Junjun;Huo, Xiaoqing;Wang, Rui;Sang, Shijing;Li, Shiyang;Zheng, Peng;Cao, Wenwu;
7:1:3:98     Structural Evolution and Properties of 0.3Pb(In1/2Nb1/2)O-3-0.38Pb(Mg1/3Nb2/3)O-3-0.32PbTiO(3) Ferroelectric Ceramics with Different Sintering Times
DOI:10.1111/jace.13086  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Ji, Wei;Tan, Chee Kiang Ivan;Yao, Kui;Al-Mamun, Abdullah;Bhatia, Charanjit S.;Wong, Ten It;
7:1:3:99     Growth and characterization of high-Curie temperature Pb(Lu1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 ternary single crystal by modified Bridgman technique
DOI:10.1016/j.jcrysgro.2015.04.031  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Chen, Jianwei;Li, Xiaobing;Zhao, Xiangyong;Zhang, Haiwu;Deng, Hao;Chen, Chao;Wang, Xi'an;Ren, Bo;Di, Wenning;Luo, Haosu;
7:1:3:100     Shear-mode piezoelectric properties of ternary Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1063/1.3385427  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Wang, Wei;Liu, Da'an;Zhang, Qinhui;Ren, Bo;Zhang, Yaoyao;Jiao, Jie;Lin, Di;Zhao, Xiangyong;Luo, Haosu;
7:1:3:101     Microstructure and dielectric relaxation of dipolar defects in Mn-doped (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) single crystals
DOI:10.1016/j.scriptamat.2013.05.018  JN:SCRIPTA MATERIALIA  PY:2013
  TC:5  AU: Li, Xiaobing;Zhao, Xiangyong;Ren, Bo;Luo, Haosu;Ge, Wenwei;Jiang, Zheng;Zhang, Shuo;
7:1:3:102     The hydrostatic pressure dependence of the piezoelectric properties for the barium titanate and lead titanate crystals: Thermodynamic analysis
DOI:10.1063/1.3596816  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Gao, Junjie;Xu, Zhuo;Li, Fei;Zhang, Chonghui;Liu, Yi;Liu, Gaomin;He, Hongliang;
7:1:3:103     The strength of PIN-PMN-PT single crystals under bending with a longitudinal electric field
DOI:10.1088/0964-1726/20/5/055006  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:6  AU: Zhao, P.;Goljahi, S.;Dong, W.;Wu, T.;Finkel, P.;Sahul, R.;Snook, K.;Luo, J.;Hackenberger, W.;Lynch, C. S.;
7:1:3:104     Reduction of electro-optic half-wave voltage of 0.93Pb(Zn1/3Nb2/3)O-3-0.07PbTiO(3) single crystal through large piezoelectric strain
DOI:10.1016/j.optmat.2010.10.047  JN:OPTICAL MATERIALS  PY:2011
  TC:7  AU: Sun, Enwei;Wang, Zhu;Zhang, Rui;Cao, Wenwu;
7:1:3:105     Optimization of piezoelectric properties for [001](c) poled 0.94Pb(Zn1/3Nb2/3)O-3-0.06PbTiO(3) single crystals
DOI:10.1063/1.3314285  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Xiang, Yang;Zhang, Rui;Cao, Wenwu;
7:1:3:106     Polarized Raman study on phase transitions in 0.24Pb(In1/2Nb1/2)O-3-0.43Pb(Mg1/3Nb2/3)O-3-0.33PbTiO(3) single crystal
DOI:10.1016/j.jallcom.2012.10.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Wu, Fengmin;Yang, Bin;Sun, Enwei;Zhang, Rui;Xu, Dapeng;Zhou, Jing;Cao, Wenwu;
7:1:3:107     Influence of manganese doping to the full tensor properties of 0.24Pb(In1/2Nb1/2)O-3-0.47Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) single crystals
DOI:10.1063/1.4792600  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Sun, Enwei;Zhang, Rui;Wu, Fengmin;Yang, Bin;Cao, Wenwu;
7:1:3:108     Single domain vs. polydomain [111] 0.72Pb(Mg1/3Nb2/3)O-3-0.28PbTiO(3) single crystal. Polarization switching, dielectric and pyroelectric properties
DOI:10.1063/1.4729749  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Dietze, Matthias;Katzke, Hannelore;Es-Souni, M.;Neumann, Norbert;Luo, Hao-Su;
7:1:3:109     Residual stress and interface effect on dielectric mechanisms in poled ultrathin relaxor ferroelectric single crystals
DOI:10.1063/1.4879250  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Li, Long;Zhao, Xiangyong;Li, Xiaobing;Xu, Qing;Yang, Linrong;Wang, Sheng;Luo, Haosu;
7:1:3:110     Effect of annealing on defect and electrical properties of Mn doped Pb(Mg1/3Nb2/3)O-3-0.28PbTiO(3) single crystals
DOI:10.1016/j.jcrysgro.2010.10.187  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:5  AU: Wu, Xiao;Liu, Linhua;Li, Xiaobing;Zhang, Qinhui;Ren, Bo;Lin, Di;Zhao, Xiangyong;Luo, Haosu;Huang, Yanlin;
7:1:3:111     The MA-type monoclinic phase and its dc electric/temperature responses studies in Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 ternary single crystals by polarized light microscopy
DOI:10.1016/j.matchemphys.2010.02.079  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:5  AU: Li, Xiaobing;Wang, Yaojin;Liu, Linhua;Zhao, Xiangyong;Luo, Haosu;Lin, Di;
7:1:3:112     Study on dielectric and piezoelectric properties of 0.7 Pb(Mg1/3Nb2/3)O-3-0.3 PbTiO3 single crystal with nano-patterned composite electrode
DOI:10.1063/1.4821517  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Chang, Wei-Yi;Huang, Wenbin;Bagal, Abhijeet;Chang, Chih-Hao;Tian, Jian;Han, Pengdi;Jiang, Xiaoning;
7:1:3:113     Beam-Mode Piezoelectric Properties of Ternary Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 Single Crystals for Medical Linear Array Applications
DOI:10.1007/s11664-011-1724-8  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2011
  TC:5  AU: Wang, Wei;Wang, Sheng;Zhang, Yaoyao;Zhao, Xiangyong;Luo, Haosu;
7:1:3:114     Micro-Raman study of the microheterogeneity in the M-A-M-C phase transition in 0.67PbMg(1/3)Nb(2/3)O(3)-0.33PbTiO(3) single crystal
DOI:10.1063/1.3574666  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Yang, Y.;Zhang, L. Y.;Zhu, K.;Liu, Y. L.;
7:1:3:115     Comment on "Complete sets of elastic, dielectric, and piezoelectric properties of flux-grown [011]-poled Pb(Mg1/3Nb2/3)O-3-(28-32)% PbTiO3 single crystals" [Appl. Phys. Lett. 92, 142906 (2008)]
DOI:10.1063/1.3429603  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Topolov, V. Yu.;
7:1:3:116     [101]-Oriented Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) Single Crystals Under Electric Loadings: Polarization Rotation Linking M(B), O, and R Phases
DOI:10.1111/j.1551-2916.2010.03975.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Fang, Fei;Yang, Wei;Luo, Xu;
7:1:3:117     The effect of the hydrostatic pressure on the electromechanical properties of ferroelectric rhombohedral single crystals Pb(Mg1/3Nb2/3)-Pb(In1/2Nb1/2)-PbTiO3
DOI:10.1063/1.3622479  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Gao, Junjie;Xu, Zhuo;Li, Fei;Zhang, Chonghui;Liu, Yi;Liu, Gaomin;He, Hongliang;
7:1:3:118     PIN-PMN-PT Single-Crystal-Based 1-3 Piezoelectric Composites for Ultrasonic Transducer Applications
DOI:10.1007/s11664-013-2627-7  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:1  AU: Li, Lili;Xu, Zhuo;Xia, Song;Li, Zhengrong;Ji, Xuanrong;Long, Shaojun;
7:1:3:119     Effects of InNbO4 Fabrication on Perovskite PIN-PMN-PT
DOI:10.1111/jace.13121  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Wang, Linghang;Zhao, Shan;Jin, Li;Li, Fei;Xu, Zhuo;
7:1:3:120     Anisotropy of the piezoelectric properties of the domain-engineered pseudotetragonal ferroelectric relaxor-PbTiO3 single crystals
DOI:10.1016/j.jallcom.2013.10.140  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Aleshin, V. I.;Raevski, I. P.;
7:1:3:121     Negative Poisson's ratio and piezoelectric anisotropy of tetragonal ferroelectric single crystals
DOI:10.1063/1.4767224  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Aleshin, V. I.;Raevski, I. P.;
7:1:3:122     Growth and pyroelectric properties of rhombohedral 0.21Pb(In1/2Nb1/2)O-3-0.49Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) ternary single crystals
DOI:10.1016/j.jcrysgro.2010.11.033  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:7  AU: Liu, Linhua;Wu, Xiao;Wang, Sheng;Di, Wenning;Lin, Di;Zhao, Xiangyong;Luo, Haosu;
7:1:3:123     Pure low-frequency flexural mode of [011](c) poled relaxor-PbTiO3 single crystals excited by k(32) mode
DOI:10.1063/1.4720150  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Liu, Gang;Jiang, Wenhua;Zhu, Jiaqi;Cao, Wenwu;
7:1:3:124     Enhancement of Piezoelectric Properties of PMN-PT Ceramics at Low Temperatures
DOI:10.1080/00150193.2012.747401  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Huang, L. Z.;Zhao, K. Y.;Ruan, W.;Ruan, X. Z.;Zhao, W.;Zeng, J. T.;Li, G. R.;
7:1:3:125     The quenched state with dominant shear vibration mode originated from domain reconfiguration in [001]-oriented Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1063/1.4876301  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhang, Yaoyao;Garland, Philip P.;Adamson, Robert B. A.;Brown, Jeremy A.;
7:1:3:126     Growth and domain structures of novel piezoelectric crystals Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3
DOI:10.1016/j.jcrysgro.2010.11.106  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:5  AU: Xu, Guisheng;Yang, Danfeng;Li, Junbao;
7:1:3:127     Domain Structure Evolution and Polarization Degradation of [101]-Oriented 0.74Pb(Mg1/3Nb2/3)O3-0.26PbTiO3 Single Crystal underCyclic Electric Loadings
DOI:10.1111/jace.12028  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Fang, Fei;Luo, Xu;Yang, Wei;
7:1:3:128     Temperature and electric field dependence of the dielectric property and domain evolution in [001]-oriented 0.34Pb(In1/2Nb1/2)O-3-0.25Pb(Mg1/3Nb2/3)O-3-0.41PbTiO(3) single crystal
DOI:10.1063/1.3525163  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Chen, Y.;Lam, K. H.;Zhou, D.;Gao, X. S.;Dai, J. Y.;Luo, H. S.;Chan, H. L. W.;
7:1:3:129     Dielectric properties and thermal induced domain evolution in the piezoelectric single crystal Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3
DOI:10.1016/j.mseb.2010.01.055  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:6  AU: Wang, Xian;Xu, Zhuo;Li, Zhenrong;Lin, Dabing;
7:1:3:130     Stability of domain engineered lead zinc niobate-lead titanate single crystals for 32-mode sound projectors
DOI:10.1063/1.3476345  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Amin, Ahmed;Okawara, Chiaki;Cross, Leslie;
7:1:3:131     Deduced property matrices of domain-engineered relaxor single crystals of [110](L)x[001](T) cut: Effects of domain wall contributions and domain-domain interactions
DOI:10.1063/1.3270426  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Shukla, Rahul;Rajan, Kalidindi Kotam;Shanthi, M.;Jin, Jing;Lim, Leong-Chew;Gandhi, Prasanna;
7:1:3:132     Linear electro-optic properties of relaxor-based ferroelectric 0.24Pb(In1/2Nb1/2)O-3-(0.762-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) single crystals
DOI:10.1063/1.4811811  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Wu, Fengmin;Yang, Bin;Sun, Enwei;Liu, Gang;Tian, Hao;Cao, Wenwu;
7:1:3:133     Complete electroelastic set for the (YXt)-45 degrees cut of a KNbO3 single crystal
DOI:10.1063/1.4902168  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Rouffaud, R.;Marchet, P.;Hladky-Hennion, A. -C.;Bantignies, C.;Pham-Thi, M.;Levassort, F.;
7:1:3:134     Minimization of pyroelectric effects in relaxor-PbTiO3 crystals for piezoelectric sensors
DOI:10.1016/j.matchemphys.2014.01.050  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Tang, Yanxue;Shen, Zongyang;Zhang, Shujun;Jiang, Wenhua;Luo, Jun;Shrout, Thomas R.;
7:1:3:135     In Situ Domain Structure Observation and Giant Magnetoelectric Coupling for PMN-PT/Terfenol-D Multiferroic Composites
DOI:10.1111/jace.12964  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Fang, Fei;Jing, Wenqi;Zhou, Yangyang;Yang, Wei;
7:1:3:136     A Pb(In1/2Nb1/2)O-3-Pb(Zn1/3Nb2/3)O-3-PbTiO3 ternary ferroelectric system with high T-C and high piezoelectric properties
DOI:10.1016/j.materresbull.2012.10.020  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:0  AU: Li, Tao;Li, Xiuzhi;Wang, Zujian;Liu, Ying;He, Chao;Shen, Dongquan;Long, Xifa;Tailor, Hamel;
7:1:3:137     Role of Domain Orientations in Forming the Hydrostatic Performance of Novel 2-2 Single Crystal/Polymer Composites
DOI:10.1080/00150193.2013.786556  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Topolov, V. Yu.;Bowen, C. R.;Krivoruchko, A. V.;
7:1:3:138     Composition dependence of field induced phase transformations in [011](C) PIN-PMN-PT relaxor ferroelectric single crystals with d(322) piezoelectric mode
DOI:10.1016/j.actamat.2014.06.062  JN:ACTA MATERIALIA  PY:2014
  TC:0  AU: Gallagher, John A.;Tian, Jian;Lynch, Christopher S.;
7:1:3:139     Hydrostatic Piezoelectric Coefficients of the 2-2 Composite Based on [011]-poled 0.71Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) Single Crystal
DOI:10.1080/00150193.2010.505888  JN:FERROELECTRICS  PY:2010
  TC:7  AU: Topolov, Vitaly Yu.;Krivoruchko, Andrey V.;Bowen, Christopher R.;Panich, Alexander A.;
7:1:3:140     Nonlinear dielectric response in piezoelectric materials for underwater transducers
DOI:10.1063/1.4770355  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Sherlock, N. P.;Garten, L. M.;Zhang, S. J.;Shrout, T. R.;Meyer, R. J., Jr.;
7:1:3:141     Phase transitions and electromechanical properties for barium titanate and lead titanate ferroelectric crystals under one-dimensional shock wave compression
DOI:10.1063/1.4768903  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Gao, Junjie;Xu, Zhuo;Li, Fei;Jiang, Dongdong;Zhang, Chonghui;Liu, Yi;Liu, Gaomin;He, Hongliang;
7:1:3:142     Study of Ni-2-Mn-Ga phase formation by magnetron sputtering film deposition at low temperature onto Si substrates and LaNiO3/Pb(Ti,Zr)O-3 buffer
DOI:10.1116/1.3256200  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2010
  TC:3  AU: Figueiras, F.;Rauwel, E.;Amaral, V. S.;Vyshatko, N.;Kholkin, A. L.;Soyer, C.;Remiens, D.;Shvartsman, V. V.;Borisov, P.;Kleemann, W.;
7:1:3:143     Energy harvesting using multilayer structure based on 0.71Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) single crystal
DOI:10.1007/s00339-010-5750-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:6  AU: Ren, Bo;Zhang, Yaoyao;Zhang, Qinhui;Li, Xiaobing;Di, Wenning;Zhao, Xiangyong;Luo, Haosu;Or, Siu Wing;
7:1:3:144     Optical properties and dispersions of rhombohedral 0.24Pb(In1/2Nb1/2)O-3-0.49Pb(Mg1/3Nb2/3)O-3-0.27PbTiO(3) single domain single crystal
DOI:10.1016/j.optmat.2013.09.020  JN:OPTICAL MATERIALS  PY:2013
  TC:1  AU: Wu, Fengmin;Yang, Bin;Sun, Enwei;Yang, Wenlong;Cao, Wenwu;
7:1:3:145     Bridgman growth and thermal analysis of Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1016/j.mseb.2010.03.034  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:3  AU: Wang, Linghang;Xu, Zhuo;Li, Zhenrong;Li, Fei;
7:1:3:146     Large pyroelectric response of 0.8Pb(Mg1/3Nb2/3)O-3-0.2PbTiO(3) ceramics prepared by reaction-sintering method
DOI:10.1016/j.matlet.2012.06.061  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Fang, Bijun;Qian, Kun;Yuan, Ningyi;Ding, Jianning;Zhao, Xiangyong;Luo, Haosu;
7:1:3:147     The Change in Domain Structures from Tweed in Rhombohedral Phase to Twin Structure in Orthorhombic One with Stress in Relaxor Ferroelectric Solid Solutions
DOI:10.1080/00150193.2013.778601  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Yasuda, N.;Hidayah, N.;Isobe, M.;Ohwa, H.;Tachi, Y.;Yamashita, Y.;
7:1:3:148     Interactions of collinear acoustic waves propagating along pure mode directions of crystals
DOI:10.1063/1.4865271  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Liu, Xiaozhou;Jiang, Wenhua;Cao, Wenwu;Jiang, Zheng;
7:1:3:149     Aging effect evolution during ferroelectric-ferroelectric phase transition: A mechanism study
DOI:10.1063/1.4811168  JN:AIP ADVANCES  PY:2013
  TC:2  AU: Feng, Zuyong;Cheng, Zhenxiang;Shi, Dongqi;Dou, Shixue;
7:1:3:150     Stability of domain engineered lead zinc niobate-lead titanate single crystals for 32-mode sound projectors (vol 97, 062903, 2010)
DOI:10.1063/1.3492839  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:0  AU: Amin, Ahmed;Okawara, Chiaki;Cross, Leslie E.;
7:1:3:151     Preparations and characterizations of perovskite 0.80PMN-0.20PT ceramic by using a one-step calcination method
DOI:10.1016/j.jallcom.2010.02.125  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:1  AU: Chen, Jin;Qiu, Shaojun;Chen, Xiuli;Xiao, Guoqing;Yang, Xiaofeng;
7:1:3:152     Piezoelectric 36-shear mode for [011] poled 24%Pb(In1/2Nb1/2) O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 ferroelectric crystal
DOI:10.1063/1.3682478  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Yan, Weiling;Han, Pengdi;Jiang, Zibo;
7:1:3:153     Orientation dependence of electromechanical properties of relaxor based ferroelectric single crystals
DOI:10.1007/s10853-010-4804-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:2  AU: Xiang, Yang;Zhang, Rui;Cao, Wenwu;
7:1:3:154     Characterization of (Bi0.5Na0.5)(1-x)BaxTiO3 grown by the TSSG method
DOI:10.1016/j.jcrysgro.2013.11.102  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:0  AU: Woll, M.;Burianek, M.;Klimm, D.;Gorfman, S.;Muehlberg, M.;
7:1:3:155     Investigation on the Thermal Stability of Pb(Mg1/3Nb2/3)O3-PbTiO3 Single Crystals
DOI:10.1080/00150191003711327  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Wang, Linghang;Xu, Zhuo;Li, Zhenrong;Li, Fei;
7:1:3:156     The Effects of the Poling Conditions on Dielectric and Piezoelectric Properties of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 Single Crystals with Morphotropic Phase Boundary Composition
DOI:10.1080/00150193.2013.846162  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Wan Yuhui;Li Zhenrong;Fan Shiji;Xu Zhuo;Yao Xi;
7:1:3:157     Polarisation Orientation Effects and Hydrostatic Parameters in Novel 2-2 Composites Basedon PMN-xPT Single Crystals
DOI:10.1080/00150193.2014.894846  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Bowen, C. R.;Topolov, V. Yu.;
7:1:4:1     Domain Engineering of Lead-Free Li-Modified (K,Na)NbO3 Polycrystals with Highly Enhanced Piezoelectricity
DOI:10.1002/adfm.201000284  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:112  AU: Wang, Ke;Li, Jing-Feng;
7:1:4:2     (K, Na) NbO3-Based Lead-Free Piezoceramics: Fundamental Aspects, Processing Technologies, and Remaining Challenges
DOI:10.1111/jace.12715  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:53  AU: Li, Jing-Feng;Wang, Ke;Zhu, Fang-Yuan;Cheng, Li-Qian;Yao, Fang-Zhou;
7:1:4:3     Antimony Tuned Rhombohedral-Orthorhombic Phase Transition and Enhanced Piezoelectric Properties in Sodium Potassium Niobate
DOI:10.1111/j.1551-2916.2010.03804.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:59  AU: Zuo, Ruzhong;Fu, Jian;Lv, Danya;Liu, Yi;
7:1:4:4     Remarkably Strong Piezoelectricity of Lead-Free (K0.45Na0.55)(0.98)Li-0.02(Nb0.77Ta0.18Sb0.05)O-3 Ceramic
DOI:10.1111/j.1551-2916.2011.04468.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:55  AU: Gao, Yong;Zhang, Jialiang;Qing, Yalin;Tan, Yongqiang;Zhang, Zong;Hao, Xiaopeng;
7:1:4:5     Temperature-Insensitive (K,Na)NbO3-Based Lead-Free Piezoactuator Ceramics
DOI:10.1002/adfm.201203754  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:56  AU: Wang, Ke;Yao, Fang-Zhou;Jo, Wook;Gobeljic, Danka;Shvartsman, Vladimir V.;Lupascu, Doru C.;Li, Jing-Feng;Roedel, Juergen;
7:1:4:6     Rhombohedral-Tetragonal Phase Coexistence and Piezoelectric Properties of (NaK)(NbSb)O-3-LiTaO3-BaZrO3 Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2010.04256.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:53  AU: Zuo, Ruzhong;Fu, Jian;
7:1:4:7     High piezoelectric activity in (Na,K)NbO3 based lead-free piezoelectric ceramics: Contribution of nanodomains
DOI:10.1063/1.3624704  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:27  AU: Fu, Jian;Zuo, Ruzhong;Xu, Zhengkui;
7:1:4:8     Giant Piezoelectricity in Potassium-Sodium Niobate Lead-Free Ceramics
DOI:10.1021/ja500076h  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2014
  TC:43  AU: Wang, Xiaopeng;Wu, Jiagang;Xiao, Dingquan;Zhu, Jianguo;Cheng, Xiaojing;Zheng, Ting;Zhang, Binyu;Lou, Xiaojie;Wang, Xiangjian;
7:1:4:9     Giant d(33) in (K,Na)(Nb,Sb)O-3-(Bi,Na,K,Li)ZrO3 based lead-free piezoelectrics with high T-c
DOI:10.1063/1.4817517  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:25  AU: Cheng, Xiaojing;Wu, Jiagang;Wang, Xiaopeng;Zhang, Binyu;Zhu, Jianguo;Xiao, Dingquan;Wang, Xiangjian;Lou, Xiaojie;
7:1:4:10     Lead-free Piezoelectrics Based on Potassium-Sodium Niobate with Giant d(33)
DOI:10.1021/am402548x  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:39  AU: Zhang, Binyu;Wu, Jiagang;Cheng, Xiaojing;Wang, Xiaopeng;Xiao, Dingquan;Zhu, Jianguo;Wang, Xiangjian;Lou, Xiaojie;
7:1:4:11     Enhanced bipolar fatigue resistance in CaZrO3-modified (K,Na) NbO3 lead-free piezoceramics
DOI:10.1063/1.4884826  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Yao, Fang-Zhou;Patterson, Eric A.;Wang, Ke;Jo, Wook;Roedel, Juergen;Li, Jing-Feng;
7:1:4:12     Enhanced Electromechanical Properties and Temperature Stability of Textured (K0.5Na0.5)NbO3-Based Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2011.04393.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:26  AU: Chang, Yunfei;Poterala, Stephen;Yang, Zupei;Messing, Gary L.;
7:1:4:13     Construction of new morphotropic phase boundary in 0.94(K0.4-xNa0.6BaxNb1-xZrx)O-3-0.06LiSbO(3) lead-free piezoelectric ceramics
DOI:10.1007/s10853-011-5650-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:35  AU: Liang, Wenfeng;Wu, Wenjuan;Xiao, Dingquan;Zhu, Jianguo;Wu, Jiagang;
7:1:4:14     Sintering Effect on Microstructure and Properties of (K,Na)NbO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04833.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:28  AU: Zhang, Shujun;Lee, Hyeong Jae;Ma, Cheng;Tan, Xiaoli;
7:1:4:15     Achieving Both Giant d(33) and High T-C in Patassium-Sodium Niobate Ternary System
DOI:10.1021/am404793e  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:14  AU: Cheng, Xiaojing;Wu, Jiagang;Lou, Xiaojie;Wang, Xiangjian;Wang, Xiaopeng;Xiao, Dingquan;Zhu, Jianguo;
7:1:4:16     Microstructural origin for the piezoelectricity evolution in (K0.5Na0.5)NbO3-based lead-free ceramics
DOI:10.1063/1.4825213  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:16  AU: Guo, Hanzheng;Zhang, Shujun;Beckman, Scott P.;Tan, Xiaoli;
7:1:4:17     Effect of HfO2 content on the microstructure and piezoelectric properties of (Bi0.5Na0.5)(0.94)Ba0.06TiO3 lead-free ceramics
DOI:10.1016/j.ceramint.2013.10.013  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Chen, Tao;Wang, Hongli;Zhang, Ting;Wang, Guangchang;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;
7:1:4:18     Aging associated domain evolution in the orthorhombic phase of < 001 > textured (K0.5Na0.5)Nb0.97Sb0.03O3 ceramics
DOI:10.1063/1.3698154  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Yao, Jianjun;Li, Jiefang;Viehland, D.;Chang, Yunfei;Messing, Gary L.;
7:1:4:19     Electric field induced intermediate phase and polarization rotation path in alkaline niobate based piezoceramics close to the rhombohedral and tetragonal phase boundary
DOI:10.1063/1.3696071  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:12  AU: Fu, Jian;Zuo, Ruzhong;Wu, S. C.;Jiang, J. Z.;Li, L.;Yang, T. Y.;Wang, Xiaohui;Li, Longtu;
7:1:4:20     Orthorhombic to tetragonal phase transition due to stress release in (Li,Ta)-doped(K,Na)NbO3 lead-free piezoceramics
DOI:10.1016/j.jeurceramsoc.2011.09.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:19  AU: Zhou, Jia-Jun;Li, Jing-Feng;Zhang, Xiao-Wen;
7:1:4:21     Piezoelectricity of lead-free (K, Na)NbO3 nanoscale single crystals
DOI:10.1039/c4tc01745e  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:6  AU: Cheng, Li-Qian;Wang, Ke;Li, Jing-Feng;Liu, Yuanming;Li, Jiangyu;
7:1:4:22     Mediating the Contradiction of d(33) and T-C in Potassium-Sodium Niobate Lead-Free Piezoceramics
DOI:10.1021/am403448r  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:11  AU: Cheng, Xiaojing;Wu, Jiagang;Wang, Xiaopeng;Zhang, Binyu;Lou, Xiaojie;Wang, Xiangjian;Xiao, Dingquan;Zhu, Jianguo;
7:1:4:23     Enhanced d(33) value in (1-x)[(K0.50Na0.50)(0.97)Li0.03Nb0.97Sb0.03O3] - xBaZrO(3) lead-free ceramics with an orthorhombic-rhombohedral phase boundary
DOI:10.1016/j.jallcom.2013.06.165  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:9  AU: Zhang, Binyu;Wang, Xiaopeng;Cheng, Xiaojing;Zhu, Jianguo;Xiao, Dingquan;Wu, Jiagang;
7:1:4:24     Enhanced piezoelectric coefficient of HfO2-modified (K0.44Na0.56)(0.94)Li-0.06(Nb0.94Sb0.06)O-3 lead-free ceramics
DOI:10.1016/j.ceramint.2013.09.045  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Chen, Tao;Wang, Hongli;Zhang, Ting;Wang, Guangchang;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;
7:1:4:25     Electric field induced phase instability in typical (Na,K)(Nb,Sb)O-3-LiTaO3 ceramics near orthorhombic and tetragonal phase boundary
DOI:10.1063/1.4748320  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Zuo, Ruzhong;Fu, Jian;Yin, G. Z.;Li, X. L.;Jiang, J. Z.;
7:1:4:26     Low electric-field driven ultrahigh electrostrains in Sb-substituted (Na,K)NbO3 lead-free ferroelectric ceramics
DOI:10.1063/1.4904476  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Fu, Jian;Zuo, Ruzhong;Qi, He;Zhang, Chen;Li, Jingfeng;Li, Longtu;
7:1:4:27     A monoclinic-tetragonal ferroelectric phase transition in lead-free (K0.5Na0.5)NbO3-x%LiNbO3 solid solution
DOI:10.1063/1.4716027  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Ge, Wenwei;Ren, Yang;Zhang, Jialiang;Devreugd, Christopher P.;Li, Jiefang;Viehland, D.;
7:1:4:28     Low-Temperature Sintering of Li-Modified (K, Na)NbO3 Lead-Free Ceramics: Sintering Behavior, Microstructure, and Electrical Properties
DOI:10.1111/j.1551-2916.2009.03532.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:26  AU: Wang, Ke;Li, Jing-Feng;
7:1:4:29     Large d(33) in (K,Na)(Nb,Ta,Sb)O-3-(Bi,Na,K)ZrO3 lead-free ceramics
DOI:10.1039/c3ta15075e  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:24  AU: Wang, Xiaopeng;Wu, Jiagang;Xiao, Dingquan;Cheng, Xiaojing;Zheng, Ting;Zhang, Binyu;Lou, Xiaojie;Zhu, Jianguo;
7:1:4:30     High Strain in (K,Na)NbO3-Based Lead-Free Piezoelectric Fibers
DOI:10.1021/cm501538x  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:9  AU: Bortolani, Francesca;del Campo, Adolfo;Fernandez, Jose F.;Clemens, Frank;Rubio-Marcos, Fernando;
7:1:4:31     Electric-field-dependent phase volume fractions and enhanced piezoelectricity near the polymorphic phase boundary of (K0.5Na0.5)(1-x)LixNbO3 textured ceramics
DOI:10.1103/PhysRevB.83.224110  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Ge, Wenwei;Li, Jiefang;Viehland, D.;Chang, Yunfei;Messing, Gary L.;
7:1:4:32     Fatigue-free unipolar strain behavior in CaZrO3 and MnO2 co-modified (K,Na)NbO3-based lead-free piezoceramics
DOI:10.1063/1.4829150  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Yao, Fang-Zhou;Glaum, Julia;Wang, Ke;Jo, Wook;Roedel, Juergen;Li, Jing-Feng;
7:1:4:33     Effect of poling temperature on piezoelectricity of CaZrO3-modified (K, Na)NbO3-based lead-free ceramics
DOI:10.1063/1.4895774  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yao, Fang-Zhou;Wang, Ke;Jo, Wook;Lee, Jae-Shin;Li, Jing-Feng;
7:1:4:34     Phase structure and electrical properties of (K0.5Na0.5)NbO3-(Bi0.5Na0.5)ZrO3 lead-free ceramics with a sintering aid of ZnO
DOI:10.1016/j.ceramint.2014.06.045  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Li, Fangxu;Xiao, Dingquan;Wu, Jiagang;Wang, Zhuo;Liu, Chao;Zhu, Jianguo;
7:1:4:35     Hot-stage transmission electron microscopy study of (Na, K)NbO3 based lead-free piezoceramics
DOI:10.1063/1.4891960  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Lu, Shengbo;Xu, Zhengkui;Kwok, K. W.;Chan, Helen L. W.;
7:1:4:36     Extremely temperature-stable piezoelectric properties of orthorhombic phase in (K, Na)NbO3-based ceramics
DOI:10.1063/1.3369435  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:22  AU: Gao, Y.;Zhang, J. L.;Zong, X. J.;Wang, C. L.;Li, J. C.;
7:1:4:37     Study of domain structure of poled (K,Na)NbO3 ceramics
DOI:10.1063/1.4807919  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Qin, Yalin;Zhang, Jialiang;Gao, Yong;Tan, Yongqiang;Wang, Chunlei;
7:1:4:38     Structure, microstructure and electrical properties of Cu2+ doped (K,Na,Li)(Nb,Ta,Sb)O-3 piezoelectric ceramics
DOI:10.1016/j.ceramint.2012.10.270  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:15  AU: Rubio-Marcos, F.;Reinosa, J. J.;Vendrell, X.;Romero, J. J.;Mestres, L.;Leret, P.;Fernandez, J. F.;Marchet, P.;
7:1:4:39     New K0.48Na0.52NbO3-Bi(Zn0.5Zr0.5)O-3 lead-free ceramics: Microstructure and piezoelectricity
DOI:10.1016/j.jallcom.2014.05.058  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Wanga, Yuanyu;Zhang, Qilong;
7:1:4:40     Effects of CaAl2O4 on the electrical properties and temperature stability of (Na0.53K0.404Li0.066)Nb0.92Sb0.08O3 ceramics
DOI:10.1016/j.jallcom.2012.07.039  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Du, Juan;Yi, Xiu-Jie;Xu, Zhi-Jun;Ban, Chao-Lei;Zhang, Da-Feng;Zhao, Pan-Pan;Wang, Chun-Ming;
7:1:4:41     Comprehensive investigation of elastic and electrical properties of Li/Ta-modified (K,Na)NbO3 lead-free piezoceramics
DOI:10.1063/1.4803711  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:12  AU: Yao, Fang-Zhou;Wang, Ke;Li, Jing-Feng;
7:1:4:42     Structure and composition characterization of Lead-free (K, Na)NbO3 piezoelectric nanorods synthesized by the molten-salt reaction
DOI:10.1039/c3tc32148g  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:6  AU: Cheng, Li-Qian;Wang, Ke;Yu, Qi;Li, Jing-Feng;
7:1:4:43     Phase structure and electrical properties of (Li,Ta)-doped (K,Na)NbO3 lead-free piezoceramics in the vicinity of Na/K=50/50
DOI:10.1007/s10853-011-5442-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:18  AU: Zhou, Jia-Jun;Li, Jing-Feng;Wang, Ke;Zhang, Xiao-Wen;
7:1:4:44     Rhombohedral-tetragonal phase coexistence and piezoelectric properties based on potassium-sodium niobate ternary system
DOI:10.1016/j.jallcom.2014.04.194  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Cheng, Xiaojing;Wu, Jiagang;Zheng, Ting;Wang, Xiaopeng;Zhang, Binyu;Xiao, Dingquan;Zhu, Jianguo;Wang, Xiangjian;Lou, Xiaojie;
7:1:4:45     Effect of the Addition of CaZrO3 and LiNbO3 on the Phase Transitions and Piezoelectric Properties of K0.5Na0.5NbO3 Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2011.04660.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:21  AU: Liang, Wenfeng;Wu, Wenjuan;Xiao, Dingquan;Zhu, Jianguo;
7:1:4:46     Lead-free piezoelectric ceramics based on (0.97-x)K0.48Na0.52NbO3-0.03Bi(0.5)(Na0.7K0.2Li0.1)(0.5)ZrO3-xB(0.5)Na(0 .5)TiO(3) ternary system
DOI:10.1063/1.4822316  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Cheng, Xiaojing;Wu, Jiagang;Wang, Xiaopeng;Zhang, Binyu;Zhu, Jianguo;Xiao, Dingquan;Wang, Xiangjian;Lou, Xiaojie;Liang, Wenfeng;
7:1:4:47     Effect of Li addition on phase formation behavior and electrical properties of (K0.5Na0.5)NbO3 lead free ceramics
DOI:10.1016/j.ceramint.2011.06.049  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:21  AU: Wongsaenmai, Supattra;Ananta, Supon;Yimnirun, Rattikorn;
7:1:4:48     Effects of the addition of Li0.8Ni0.2Nb0.96O3 on the structure and electrical properties of K0.48Na0.52NbO3 lead-free piezoceramics
DOI:10.1016/j.mseb.2014.07.005  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:1  AU: Feng, Wei;Huang, Yanqiu;Yang, Cheng;Lu, Jian;Huang, Ya;Hu, Qingbin;Qin, Haina;
7:1:4:49     High and Frequency-Insensitive Converse Piezoelectric Coefficient Obtained in AgSbO3-Modified (Li, K, Na)(Nb,Ta)O-3 Lead-Free Piezoceramics
DOI:10.1111/jace.12061  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Zhou, Jia-Jun;Wang, Ke;Li, Fu;Li, Jing-Feng;Zhang, Xiao-Wen;Wang, Qing-Ming;
7:1:4:50     Low-temperature sintering of (K,Na)NbO3-based lead-free piezoceramics with addition of LiF
DOI:10.1016/j.jeurceramsoc.2013.11.029  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Zhou, Jia-Jun;Cheng, Li-Qian;Wang, Ke;Zhang, Xiao-Wen;Li, Jing-Feng;Liu, Hong;Fang, Jing-Zhong;
7:1:4:51     Characterization of potassium-modified Li0.12Na0.88Nb0.97Sb0.03O3 lead-free piezoceramics
DOI:10.1016/j.jallcom.2013.08.111  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Peng, Zhihang;Chen, Qiang;Yan, Dongxu;Xiao, Dinquan;Zhu, Jianguo;
7:1:4:52     Gigantic Electrostrain in Duplex Structured Alkaline Niobates
DOI:10.1021/cm301324h  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:15  AU: Choi, Si-Young;Jeong, Soon-Jong;Lee, Dae-Su;Kim, Min-Soo;Lee, Jae-Shin;Cho, Jeong Ho;Kim, Byoung Ik;Ikuhara, Yuichi;
7:1:4:53     Composition Inhomogeneity due to Alkaline Volatilization in Li-Modified (K, Na)NbO3 Lead-Free Piezoceramics
DOI:10.1111/jace.12497  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Cheng, Li-Qian;Wang, Ke;Yao, Fang-Zhou;Zhu, Fangyuan;Li, Jing-Feng;
7:1:4:54     Addition of small amounts of BiFeO3 to (Li,K,Na)(Nb,Ta)O-3 lead-free ceramics: Influence on phase structure, microstructure and piezoelectric properties
DOI:10.1016/j.jeurceramsoc.2012.05.019  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Zhou, Jia-Jun;Li, Jing-Feng;Cheng, Li-Qian;Wang, Ke;Zhang, Xiao-Wen;Wang, Qing-Ming;
7:1:4:55     New Potassium-Sodium Niobate Ceramics with a Giant d(33)
DOI:10.1021/am500819v  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:11  AU: Wang, Xiaopeng;Wu, Jiagang;Xiao, Dingquan;Cheng, Xiaojing;Zheng, Ting;Lou, Xiaojie;Zhang, Binyu;Zhu, Jianguo;
7:1:4:56     High strain in (K0.40Na0.60)(Nb0.955Sb0.045)O-3-Bi0.50Na0.50ZrO3 lead-free ceramics with large piezoelectricity
DOI:10.1039/c4tc01533a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:3  AU: Zheng, Ting;Wu, Jiagang;Cheng, Xiaojing;Wang, Xiaopeng;Zhang, Binyu;Xiao, Dingquan;Zhu, Jianguo;Wang, Xiangjian;Lou, Xiaojie;
7:1:4:57     High Strain in (K,Na)NbO3 -Based Lead-Free Piezoceramics
DOI:10.1021/am505887y  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:3  AU: Tao, Hong;Wu, Jiagang;Xiao, Dingquan;Zhu, Jianguo;Wang, Xiangjian;Lou, Xiaojie;
7:1:4:58     New phase boundary and piezoelectric properties in (K, Na)NbO3 based ceramics
DOI:10.1016/j.jallcom.2013.10.016  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Wang, Hui;Wu, Jiagang;Cheng, Xiaojing;Xiao, Dingquan;Zhu, Jianguo;
7:1:4:59     Influence of SrZrO3 addition on structural and electrical properties of (K0.45Na0.51Li0.04)(Nb0.90Ta0.04Sb0.06)O-3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2013.12.116  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Huang, Yanqiu;Du, Haiwei;Feng, Wei;Qin, Haina;Hu, Qingbin;
7:1:4:60     BiFeO3-modified (Li, K, Na)(Nb, Ta)O-3 lead-free piezoelectric ceramics with temperature-stable piezoelectric property and enhanced mechanical strength
DOI:10.1007/s10853-011-5957-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:7  AU: Zhou, Jia-Jun;Li, Jing-Feng;Zhang, Xiao-Wen;
7:1:4:61     Domain configuration and piezoelectric properties of (K0.50Na0.50)(1-x)Li-x(Nb0.80Ta0.20)O-3 ceramics
DOI:10.1016/j.jeurceramsoc.2014.07.026  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:6  AU: Qin, Yalin;Zhang, Jialiang;Tan, Yongqiang;Yao, Weizeng;Wang, Chunlei;Zhang, Shujun;
7:1:4:62     Phase transition and electrical properties of (1-x)K0.5Na0.5 NbO3-xBi(0.5)Na(0.5)Zr(0.8)Ti(0.2)O(3) lead-free piezoceramics
DOI:10.1016/j.ceramint.2014.01.133  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Wang, Z.;Wu, J. G.;Xiao, M.;Xiao, D. Q.;Huang, T.;Wu, B.;Li, F. X.;Zhu, J. G.;
7:1:4:63     Structure and Electrical Properties of LiF Doped 0.996(0.95K(0.5)Na(0.5)NbO(3)-0.05LiSbO(3))-0.004BiFeO(3) Piezoelectric Ceramics
DOI:10.1080/00150193.2014.932543  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Shi, Danping;Liu, Laijun;Huang, Yanmin;Fang, Liang;Hu, Changzheng;
7:1:4:64     New potassium-sodium niobate lead-free piezoceramic: Giant-d(33) vs. sintering temperature
DOI:10.1063/1.4868585  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:11  AU: Wu, Jiagang;Wang, Xiaopeng;Cheng, Xiaojing;Zheng, Ting;Zhang, Binyu;Xiao, Dingquan;Zhu, Jianguo;Lou, Xiaojie;
7:1:4:65     Piezoelectric behavior of (1-x)K0.50Na0.50NbO3-xBa(0.80)Ca(0.20)ZrO(3) lead-free ceramics
DOI:10.1016/j.ceramint.2013.01.098  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Chen, Tao;Wang, Hongli;Zhang, Ting;Wang, Guangchang;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;
7:1:4:66     Enhanced piezoelectric properties of (K0.40Na0.60)(0.94)Li0.06Nb0.94SbO3 lead-free ceramics by optimizing the sintering temperature
DOI:10.1016/j.ceramint.2013.08.102  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Chen, Tao;Wang, Hongli;Zhang, Ting;Wang, Guangchang;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;
7:1:4:67     Structure and electrical properties of [(K0.49Na0.51)(1-x)Li-x](Nb0.90Ta0.04Sb0.06)O-3 lead-free piezoceramics
DOI:10.1016/j.ceramint.2012.12.086  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Du, Haiwei;Huang, Yanqiu;Tang, Hongping;Feng, Wei;Qin, Haina;Lu, Xiufang;
7:1:4:68     The A-site Li+ driven orthorhombic-tetragonal ferroelectric phase transition and evolving local structures in (Na,K)(Nb,Sb)O-3-LiTaO3 lead-free ceramics
DOI:10.1063/1.4798830  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Fu, Jian;Zuo, Ruzhong;
7:1:4:69     Electric field induced monoclinic phase in (Na0.52K0.48)(Nb1-ySby)O-3 ceramics close to the rhombohedral-orthorhombic polymorphic phase boundary
DOI:10.1063/1.4828713  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Fu, Jian;Zuo, Ruzhong;Gao, Xingyu;
7:1:4:70     Electrical and Mechanical Properties of Fine-Grained Li/Ta-Modified (Na,K)NbO3-Based Piezoceramics Prepared by Spark Plasma Sintering
DOI:10.1111/j.1551-2916.2009.03542.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:22  AU: Shen, Zong-Yang;Li, Jing-Feng;Wang, Ke;Xu, Siyang;Jiang, Wan;Deng, Qihuang;
7:1:4:71     Synthesis and Piezoelectricity of Single-Crystalline (K,Na)NbO3 Nanobars
DOI:10.1111/j.1551-2916.2011.04722.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Xu, Siyang;Li, Jing-Feng;
7:1:4:72     Microstructure and piezoelectric properties of CuO-doped 0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O-3 lead-free ceramics
DOI:10.1016/j.jeurceramsoc.2011.04.018  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Zhao, Yongjie;Zhao, Yuzhen;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;
7:1:4:73     Microstructure of sodium-potassium niobate ceramics sintered under high alkaline vapor pressure atmosphere
DOI:10.1016/j.jeurceramsoc.2014.06.021  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Acker, Jerome;Kungl, Hans;Schierholz, Roland;Wagner, Susanne;Eichel, Ruediger-A.;Hoffmann, Michael J.;
7:1:4:74     Microstructure and piezoelectric properties of NaF-doped K0.5Na0.5Nb0.95Ta0.05O3 lead-free ceramics
DOI:10.1007/s10853-012-6887-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:1  AU: Li, Huan;Gong, Dewei;Yang, Wenlong;Zhou, Zhongxiang;
7:1:4:75     Dielectric, ferroelectric, and piezoelectric properties in potassium sodium niob ate ceramics with rhombohedral-orthorhombic and orthorhombic-tetragonal phase boundaries
DOI:10.1016/j.ceramint.2013.11.016  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Cheng, Xiaojing;Gou, Qian;Wu, Jiagang;Wang, Xiaopeng;Zhang, Binyu;Xiao, Dingquan;Zhu, Jianguo;Wang, Xiangjian;Lou, Xiaojie;
7:1:4:76     Polymorphic phase transition-induced electrical behavior of BiCoO3-modified (K0.48Na0.52)NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2011.05.004  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:15  AU: Wu, Wenjuan;Xiao, Dingquan;Wu, Jiagang;Liang, Wenfeng;Li, Jing;Zhu, Jianguo;
7:1:4:77     Enhanced dielectric and piezoelectric properties in Li/Sb-modified (Na, K)NbO3 ceramics by optimizing sintering temperature
DOI:10.1016/j.ceramint.2012.06.043  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:13  AU: Zhao, Yongjie;Huang, Rongxia;Liu, Rongzheng;Wang, Xilin;Zhou, Heping;
7:1:4:78     Investigation on transition behavior and electrical properties of (K0.5Na0.5)(1-x)LixNb0.84Ta0.1Sb0.06O3 around polymorphic phase transition region
DOI:10.1063/1.4863200  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Zhu, Chen;Wang, Wenchao;Huang, Jiquan;Tang, Fei;Liu, Yang;Shi, Honglin;Wang, Fangyu;Wang, Chong;Cao, Yongge;Yuan, Xuanyi;
7:1:4:79     Influence of ball milling on sintering behavior and electrical properties of (Li,Na,K)NbO3 lead-free piezoceramics
DOI:10.1007/s10853-012-6635-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:8  AU: Cheng, Li-Qian;Zhou, Jia-Jun;Wang, Ke;Li, Jing-Feng;Wang, Qing-Ming;
7:1:4:80     Comparative study of two (K,Na)NbO3-based piezoelectric ceramics
DOI:10.1063/1.4895529  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhang, Jialiang;Gao, Yong;Qin, Yalin;Yao, Weizeng;Tian, Xing;
7:1:4:81     Compositional dependence of phase structure and electrical properties in (K0.50Na0.50)(0.97)Bi-0.01(Nb1-xZrx)O-3 lead-free ceramics
DOI:10.1016/j.ceramint.2013.03.071  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:13  AU: Wang, Xiaopeng;Wu, Jiagang;Cheng, Xiaojing;Zhang, Binyu;Zhu, Jianguo;Xiao, Dingquan;
7:1:4:82     Normal to Relaxor Ferroelectric Transition and Domain Morphology Evolution in (K,Na)(Nb,Sb)O3-LiTaO3-BaZrO3 Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2011.04712.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:12  AU: Zuo, Ruzhong;Fu, Jian;Lu, Shengbo;Xu, Zhengkui;
7:1:4:83     Sintering and electrical properties of La-modified (Na0.52K0.45Li0.03)(1-3x)La-x(Nb0.88Sb0.09Ta0.03)O-3 lead-free ceramics
DOI:10.1016/j.ceramint.2013.08.098  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Du, Juan;Xu, Zhijun;Deng, Baojun;Chu, Ruiqing;Yi, Xiujie;Zheng, Limei;Li, Yuchao;
7:1:4:84     The phase structure and electric properties of low-temperature sintered (K, Na)NbO3-based piezoceramics modified by CuO
DOI:10.1016/j.ceramint.2013.10.019  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Zhou, Jia-Jun;Cheng, Li-Qian;Wang, Ke;Zhang, Xiao-Wen;Li, Jing-Feng;Liu, Hong;Fang, Jing-Zhong;
7:1:4:85     Effect of Changing Na/K Ratio on Structure and Electrical Properties of (NaxKy) (Nb0.885Sb0.08)-0.035LiTaO(3) Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2011.04558.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Kang, Yan;Zhao, Yuzhen;Huang, Rongxia;Zhao, Yongjie;Zhou, Heping;
7:1:4:86     Enhanced piezoelectric properties of (Na0.5+y+zK0.5-y)(Nb1-xTax)O-3 ceramics
DOI:10.1063/1.4732523  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Sung, Y. S.;Baik, S.;Lee, J. H.;Ryu, G. H.;Do, D.;Song, T. K.;Kim, M. H.;Kim, W. J.;
7:1:4:87     Microscale 1-3-Type (Na,K)NbO3-Based Pb-Free Piezocomposites for High-Frequency Ultrasonic Transducer Applications
DOI:10.1111/j.1551-2916.2011.04508.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:17  AU: Shen, Zong-Yang;Li, Jing-Feng;Chen, Ruimin;Zhou, Qifa;Shung, K. Kirk;
7:1:4:88     Improvement of Physical Properties for KNN- based Ceramics by Modified Two- Step Sintering
DOI:10.1111/jace.12794  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Zhang, Jialiang;Qin, Yalin;Gao, Yong;Yao, Weizeng;Zhao, Minglei;
7:1:4:89     Improvement in temperature stability and modified polymorphic phase transition of La-doped (Na0.52K0.44Li0.04) Nb0.8Ta0.2O3 lead-free piezoelectric ceramics
DOI:10.1016/j.matlet.2011.12.014  JN:MATERIALS LETTERS  PY:2012
  TC:6  AU: Yang, Wenlong;Zhou, Zhongxiang;Yang, Bin;Jiang, Yongyuan;Li, Huan;Pei, Yanbo;
7:1:4:90     Lead-free (Li, Na, K)(Nb, Sb)O-3 piezoelectric ceramics: effect of Bi(Ni0.5Ti0.5)O-3 modification and sintering temperature on microstructure and electrical properties
DOI:10.1007/s10853-012-7078-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:2  AU: Yang, Huabin;Zhou, Changrong;Zhou, Qin;Yuan, Changlai;Li, Weizhou;Wang, Hua;
7:1:4:91     Effect of New Phase Boundary on the Dielectric and Piezoelectric Properties of K0.5Na0.5NbO3-xBaZrO3-yBi0.5Na0.5TiO3Lead-free Ceramics
DOI:10.1080/10584587.2012.737221  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:2  AU: Liang, Wenfeng;Wang, Zhuo;Xiao, Dingquan;Wu, Jiagang;Wu, Wenjuan;Huang, Tao;Zhu, Jianguo;
7:1:4:92     Enhancement of Qm in CuO-doped compositionally optimized Li/Ta-modified (Na,K)NbO3 lead-free piezoceramics
DOI:10.1016/j.ceramint.2011.04.113  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:15  AU: Shen, Zong-Yang;Xu, Ying;Li, Jing-Feng;
7:1:4:93     High electromechanical performance with spark plasma sintering of undoped K0.5Na0.5NbO3 ceramics
DOI:10.1016/j.ceramint.2013.12.097  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Bah, Micka;Giovannelli, Fabien;Schoenstein, Frederic;Feuillard, Guy;Le Clezio, Emmanuel;Monot-Laffez, Isabelle;
7:1:4:94     Effects of SrTiO3 on dielectric and piezoelectric properties of K0.48Na0.48Li0.04Nb0.96Ta0.04O3-based piezoceramics
DOI:10.1016/j.mseb.2012.11.022  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Bafandeh, Mohammad Reza;Abbasi, Mohammad Hasan;Saidi, Ali;Lee, Jae-Shin;
7:1:4:95     Effects of the Domain Size on Local d33 in Tetragonal (Na0.53 K0.45Li0.02)(Nb0.8Ta0.2)O3 Ceramics
DOI:10.1111/j.1551-2916.2012.05445.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Duc-Thang Le;Kwon, So-Jung;Yeom, Na-Ri;Lee, Young-Jin;Jeong, Young-Hun;Chun, Myoung-Pyo;Nam, Joong-Hee;Paik, Jong-Hoo;Kim, Byung-Ik;Cho, Jeong-Ho;
7:1:4:96     Comparative study of the effect of domain structures on piezoelectric properties in three typical Pb-free piezoceramics
DOI:10.1016/j.ceramint.2014.05.070  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Lu, Shengbo;Xu, Zhengkui;Zuo, Ruzhong;
7:1:4:97     The investigation of depoling mechanism of densified KNbO3 piezoelectric ceramic
DOI:10.1063/1.3614541  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Ge, Haiyan;Hou, Yudong;Rao, Xue;Zhu, Mankang;Wang, Hao;Yan, Hui;
7:1:4:98     Influence of rare-earth Nd, Dy, and Ho doping on structural and electrical properties of (Na0.53K0.47)(0.942)Li0.058NbO3 based lead-free piezoceramics
DOI:10.1016/j.ceramint.2013.08.020  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Zhou, Jing;Ma, Qing;Wang, Pengfei;Cheng, Lijin;Liu, Shaojun;
7:1:4:99     Hydrothermal-assisted synthesis and sintering of K0.5Na0.5NbO3-xLiTaO(3) lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2014.02.021  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Hao, Hangfei;Tan, Guoqiang;Ren, Huijun;Xia, Ao;Xiong, Peng;
7:1:4:100     Textured (K0.5Na0.5)NbO3 ceramics prepared by screen-printing multilayer grain growth technique
DOI:10.1016/j.ceramint.2011.04.102  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Li, Yali;Hui, Chun;Wu, Mengjia;Li, Yongxiang;Wang, Youliang;
7:1:4:101     Crystal structure, microstructure and electrical properties of (1-x-y)Bi0.5Na0.5TiO3-xBi(0.5)K(0.5)TiO(3)-yBiFeO(3) ceramics near MPB prepared via the combustion technique
DOI:10.1016/j.ceramint.2012.10.104  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Sumang, Rattiphorn;Vittayakorn, Naratip;Bongkarn, Theerachai;
7:1:4:102     Neodymium doping of KNNLT
DOI:10.1016/j.jeurceramsoc.2012.05.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Bathelt, R.;Soller, T.;Benkert, K.;Schuh, C.;Roosen, A.;
7:1:4:103     Low-Temperature Sintering of CuO-Doped 0.94(K0.48Na0.535)NbO3-0.06LiNbO(3) Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2010.04227.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Huang, Rongxia;Zhao, Yuzhen;Zhang, Xiaowen;Zhao, Yongjie;Liu, Rongzheng;Zhou, Heping;
7:1:4:104     An ultrasonic therapeutic transducers using lead-free Na0.5K0.5NbO3-CuNb2O6 ceramics
DOI:10.1016/j.jallcom.2010.07.150  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Yang, Ming-Ru;Chu, Sheng-Yuan;Tsai, Cheng-Che;
7:1:4:105     Structural, dielectric and piezoelectric features of (Na0.52K0.44Li0.04)Nb0.87Sb0.08Ta0.05O3 ceramics
DOI:10.1016/j.matlet.2012.04.013  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Du, Juan;Zang, Guo-Zhong;Yi, Xiu-Jie;Xu, Zhi-Jun;Chu, Rui-Qing;Ban, Chao-Lei;Wei, Yan-Yan;Zhao, Pan-Pan;Wang, Chun-Ming;
7:1:4:106     SmAlO3-modified (K0.5Na0.5)(0.95)Li0.05Sb0.05Nb0.95O3 lead-free ceramics with a wide sintering temperature range
DOI:10.1016/j.mseb.2013.06.013  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Du, Juan;Xu, Zhijun;Chu, Ruiqing;Yi, Xiujie;Chao, Wenna;Zhang, Xiaofeng;Zhang, Peiyu;Zheng, Limei;
7:1:4:107     Temperature dependence of the local piezoresponse in (K,Na)NbO3-based ceramics with large electromechanical strain
DOI:10.1063/1.4891398  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Gobeljic, Danka;Shvartsman, Vladimir V.;Wang, Ke;Yao, Fangzhou;Li, Jing-Feng;Jo, Wook;Roedel, Juergen;Lupascu, Doru C.;
7:1:4:108     Large decrease of characteristic frequency of dielectric relaxation associated with domain-wall motion in Sb5+-modified (K,Na)NbO3-based ceramics
DOI:10.1063/1.4773023  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Zhang, Jialiang;Hao, Wentao;Gao, Yong;Qin, Yalin;Tan, Yongqiang;Wang, Chunlei;
7:1:4:109     Dielectric and Piezoelectric Properties of Lead-free (Li,Na, K)(Nb,Ta,Sb)O-3 System Ceramics as a Function of Calcination Temperature
DOI:10.1080/00150193.2012.741947  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Yoo, Juhyun;
7:1:4:110     Phase structure and electrical properties of Yb and Mn co-substituted (K0.48Na0.52)NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2013.11.057  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Wu, Wenjuan;Chen, Min;Ding, Yingchun;Liu, Chuanqi;
7:1:4:111     New Lead-Free (1 - x)(K0.5Na0.5) NbO3-x(Bi0.5Na0.5)ZrO3 Ceramics with High Piezoelectricity
DOI:10.1111/jace.12836  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Wang, Zhuo;Xiao, Dingquan;Wu, Jiagang;Xiao, Min;Li, Fangxu;Zhu, Jianguo;
7:1:4:112     Giant piezoelectricity of (K,Na)(Nb,Sb)O-3-(Bi,Na,K,Pb)ZrO3 ceramics with rhombohedral-tetragonal (R-T) phase boundary
DOI:10.1016/j.scriptamat.2014.06.001  JN:SCRIPTA MATERIALIA  PY:2014
  TC:1  AU: Wu, Jiagang;Xiao, Jianqiao;Zheng, Ting;Wang, Xiaopeng;Cheng, Xiaojing;Zhang, Binyu;Xiao, Dingquan;Zhu, Jianguo;
7:1:4:113     Internal bias field relaxation in poled Mn-doped Pb(Mn1/3Sb2/3)O-3-Pb (Zr,Ti)O-3 ceramics
DOI:10.1016/j.ceramint.2013.03.023  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Du, Gang;Liang, Ruihong;Wang, Li;Li, Kui;Zhang, Wenbin;Wang, Genshui;Dong, Xianlin;
7:1:4:114     Dielectric and piezoelectric properties of SrZrO3-modified (K0.45Na0.51Li0.04)(Nb0.90Ta0.04Sb0.06)O-3 lead-free piezoceramics
DOI:10.1016/j.matlet.2013.04.052  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Du, Haiwei;Huang, Yanqiu;Tang, Hongping;Qin, Haina;Feng, Wei;
7:1:4:115     Influence of domain orientation on the mechanical properties of lead zirconate titanate piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2010.09.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Okayasu, Mitsuhiro;Sato, Kazuto;Mizuno, Mamoru;
7:1:4:116     Relationships between crystal structure and electrical properties of Li-0.055[Ag-x(K0.5Na0.5)(1-x)](0.945)(Nb1-yTay)O-3 ceramics
DOI:10.1016/j.ceramint.2011.04.112  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Seo, Seock No;Cho, Jeong Ho;Kim, Byung Ik;Kim, Eung Soo;
7:1:4:117     0.99(K0.45Na0.52Li0.03)(Nb1-xSbx)O-3-0.01BiScO(3) lead-free ceramics with excellent piezoelectric properties and broad sintering temperature
DOI:10.1016/j.ceramint.2013.11.113  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Liu, Chao;Xiao, Dingquan;Huang, Tao;Wu, Jiagang;Li, Fangxu;Zhu, Jianguo;
7:1:4:118     Effect of SrZrO3 on phase structure and electrical properties of 0.974(K0.5Na0.5)NbO3-0.026Bi(0.5)K(0.5)TiO(3) lead-free ceramics
DOI:10.1016/j.ceramint.2013.10.048  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Huang, Tao;Xiao, Dingquan;Liu, Chao;Li, Fangxu;Wu, Bo;Wu, Jiagang;Zhu, Jianguo;
7:1:4:119     Composition induced rhombohedral-tetragonal phase boundary in BaZrO3 modified (K0.445Na0.50Li0.055)NbO3 lead-free ceramics
DOI:10.1016/j.matlet.2014.01.096  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Liu, Chao;Xiao, Dingquan;Huang, Tao;Wu, Jiagang;Li, Fangxu;Wu, Bo;Zhu, Jianguo;
7:1:4:120     Roles of Li and Ta in Pb-free piezoelectric (Na,K)NbO3 ceramics
DOI:10.1063/1.4897642  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Sung, Y. S.;
7:1:4:121     Effect of tetragonal perovskite phase addition on the electrical properties of KNN thick films fabricated by aerosol deposition
DOI:10.1016/j.matlet.2011.06.010  JN:MATERIALS LETTERS  PY:2011
  TC:5  AU: Han, Guifang;Ahn, Cheol-Woo;Ryu, Jungho;Yoon, Woon-Ha;Choi, Jong-Jin;Hahn, Byung-Dong;Kim, Jong-Woo;Choi, Joon-Hwan;Park, Dong-Soo;
7:1:4:122     Good temperature stability and high piezoelectric properties of pure and La-doped tetragonal (K0.45Na0.55)(0.94)Li-0.06 center dot TaxNb1-xO3 ceramics
DOI:10.1016/j.jeurceramsoc.2014.06.033  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Li, Huan;Meng, Qingxin;Gong, Dewei;Tian, Hao;Zhou, Zhongxiang;
7:1:4:123     Temperature stability, phase structure and electrical behavior of Li-modified 0.99(K0.48Na0.52)NbO3-0.01BiCoO(3) piezoelectric ceramics
DOI:10.1016/j.ceramint.2013.06.114  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Wu, Wenjuan;Xiao, Dingquan;Ma, Jian;Wu, Jiagang;Li, Jing;Liang, Wenfeng;
7:1:4:124     High Piezoelectric Properties of KNN-Based Thick Films with Abnormal Grain Growth
DOI:10.1111/j.1551-2916.2012.05139.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Han, Guifang;Ryu, Jungho;Ahn, Cheol-Woo;Yoon, Woon-Ha;Choi, Jong-Jin;Hahn, Byung-Dong;Kim, Jong-Woo;Choi, Joon-Hwan;Park, Dong-Soo;
7:1:4:125     Hot-stage transmission electron microscopy study of (Na, K)NbO3 based lead-free piezoceramics (vol 105, 042904, 2014)
DOI:10.1063/1.4894639  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Lu, Shengbo;Xu, Zhengkui;Kwok, K. W.;Chan, Helen L. W.;Zuo, Ruzhong;
7:1:4:126     Fabrication of 1-3 connectivity (Ba0.95Pb0.05)(Ti0.99Co0.01) O-3/monothane-A70 composites by die-pressing method and their electrical characterizations
DOI:10.1016/j.ceramint.2014.03.155  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Mirza, Muhammad Saleem;Yasin, Tariq;Ikram, Masroor;Khan, Muhammad Nasir;Shuaib, Muhammad;
7:1:4:127     Fabrication and characterization of Na0.5K0.5NbO3-CuNb2O6 lead-free step-down piezoelectric transformers
DOI:10.1063/1.3624579  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Yang, Ming-Ru;Chu, Sheng-Yuan;Chan, I-Hao;Huang, Sheng-Kai;
7:1:4:128     Effects of Li content on the phase structure and electrical properties of lead-free (Ag0.85-xLixNa0.1K0.05)NbO3 piezoelectric ceramics
DOI:10.1063/1.3692063  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Wu, Lang;Liu, Naiming;Zhou, Fei;Teng, Yuancheng;Li, Yuxiang;
7:1:4:129     Electrical Properties of Textured (KNa)(0.44)Li0.06Nb0.84Sb0.06Ta0.1O3 Thick Films
DOI:10.1007/s11664-012-2197-0  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:0  AU: Fu, Fang;Zhai, Jiwei;Xu, Zhengkui;Bai, Wangfeng;Kong, Lingbing;
7:1:4:130     Thermal Properties and Phase Transition Behavior of KNN-AN Piezoelectric Ceramics
DOI:10.1080/00150193.2011.594762  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Shi, Jing;Fan, Huiqing;
7:1:4:131     Electrical properties of [Li-0.04(K0.5Na0.5)(0.96-x)Ag-x](Nb1-ySby)O-3 ceramics
DOI:10.1016/j.ceramint.2011.04.115  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Lee, J. K.;Kim, J. H.;Cho, J. H.;Kim, B. I.;Kim, E. S.;
7:1:4:132     Electrical Properties of CuO-doped (K0.5Na0.5)(Nb0.92Sb0.03Ta0.05)O-3 Piezoelectric Ceramics with High Q(m)
DOI:10.1080/00150193.2013.849970  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Liu, Chao;Xiao, Ding-Quan;Wu, Jia-Gang;Wang, Zhuo;Li, Fang-Xu;Huang, Tao;Zhu, Jian-Guo;
7:1:4:133     Piezoelectric Properties of (1-x)(K0.52Na0.48)(1-x)LixNbO3-x(Bi0.5Na0.5)(0.9)Ca0.1TiO3 with Higher Curie Temperature
DOI:10.1080/10584587.2013.778751  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Wu, Wenjuan;Wang, Zhuo;Xiao, Dingquan;Ma, Jian;Wu, Jiagang;Li, Jing;Liang, Wenfeng;Zhu, Jianguo;
7:1:4:134     Processing and electromechanical properties of lanthanum-doped Pb(Zr,Ti)O-3 extruded piezoelectric fibres
DOI:10.1007/s10853-011-5345-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:2  AU: Clemens, F.;Comyn, T.;Heiber, J.;Nobre, F.;Dent, A. C. E.;Bowen, C. R.;
7:1:4:135     Microstructural, piezoelectric properties and temperature stability in Li-0.02(Na0.55K0.45)(0.98)[(Nb0.77Ta0.18Sb0.05)(1-) Cu-2x/5(x)]O-3 ceramics for piezoelectric actuator
DOI:10.1016/j.matlet.2012.04.010  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: Oh, Youngkwang;Yoo, Juhyun;
7:1:4:136     Piezoelectric and dielectric properties of 0.98(Na0.5K0.5)NbO3-0.02Ba(ZrxTi(1-x))O-3 ceramics
DOI:10.1016/j.materresbull.2012.04.095  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:2  AU: Lee, Seung-Hwan;Lee, Sung-Gap;Lee, Young-Hie;
7:1:4:137     Effect of Changing Na/K Ratio on Structure and Electrical Properties of (NaxKy) (Nb0.885Sb0.08)-0.035LiTaO(3) Lead-Free Piezoelectric Ceramics (vol 94, pg 1683, 2011)
DOI:10.1111/j.1551-2916.2011.04955.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:0  AU: Kang, Yan;Zhao, Yuzhen;Huang, Rongxia;Zhao, Yongjie;Zhou, Heping;
7:1:5:1     A morphotropic phase boundary system based on polarization rotation and polarization extension
DOI:10.1063/1.3479479  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:138  AU: Damjanovic, Dragan;
7:1:5:2     Microstructure basis for strong piezoelectricity in Pb-free Ba(Zr0.2Ti0.8)O-3-(Ba0.7Ca0.3)TiO3 ceramics
DOI:10.1063/1.3629784  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:58  AU: Gao, Jinghui;Xue, Dezhen;Wang, Yu;Wang, Dong;Zhang, Lixue;Wu, Haijun;Guo, Shengwu;Bao, Huixin;Zhou, Chao;Liu, Wenfeng;Hou, Sen;Xiao, Ge;Ren, Xiaobing;
7:1:5:3     Elastic, piezoelectric, and dielectric properties of Ba(Zr0.2Ti0.8)O-3-50(Ba0.7Ca0.3)TiO3 Pb-free ceramic at the morphotropic phase boundary
DOI:10.1063/1.3549173  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:76  AU: Xue, Dezhen;Zhou, Yumei;Bao, Huixin;Zhou, Chao;Gao, Jinghui;Ren, Xiaobing;
7:1:5:4     Elastic, dielectric, and piezoelectric anomalies and Raman spectroscopy of 0.5Ba(Ti0.8Zr0.2)O-3-0.5(Ba0.7Ca0.3)TiO3
DOI:10.1063/1.4714703  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:34  AU: Damjanovic, Dragan;Biancoli, Alberto;Batooli, Leili;Vahabzadeh, Amirhossein;Trodahl, Joe;
7:1:5:5     Revised structural phase diagram of (Ba0.7Ca0.3TiO3)-(BaZr0.2Ti0.8O3)
DOI:10.1063/1.4793400  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:35  AU: Keeble, Dean S.;Benabdallah, Feres;Thomas, Pam A.;Maglione, Mario;Kreisel, Jens;
7:1:5:6     Phase coexistence and ferroelastic texture in high strain (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 piezoceramics
DOI:10.1063/1.4730342  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:40  AU: Ehmke, Matthias C.;Ehrlich, Steven N.;Blendell, John E.;Bowman, Keith J.;
7:1:5:7     Structure and phase transitions in 0.5(Ba0.7Ca0.3TiO3)-0.5(BaZr0.2Ti0.8O3) from -100 degrees C to 150 degrees C
DOI:10.1063/1.4772741  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:42  AU: Haugen, Astri Bjornetun;Forrester, Jennifer S.;Damjanovic, Dragan;Li, Binzhi;Bowman, Keith J.;Jones, Jacob L.;
7:1:5:8     Composition and poling condition-induced electrical behavior of (Ba0.85Ca0.15)(Ti1-xZrx)O-3 lead-free piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2011.11.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:57  AU: Wu, Jiagang;Xiao, Dingquan;Wu, Wenjuan;Chen, Qiang;Zhu, Jianguo;Yang, Zhengchun;Wang, John;
7:1:5:9     Triple-point-type morphotropic phase boundary based large piezoelectric Pb-free material-Ba(Ti0.8Hf0.2)O-3-(Ba0.7Ca0.3)TiO3
DOI:10.1063/1.4724216  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:26  AU: Zhou, Chao;Liu, Wenfeng;Xue, Dezhen;Ren, Xiaobing;Bao, Huixin;Gao, Jinghui;Zhang, Lixue;
7:1:5:10     Phase transitions and the piezoelectricity around morphotropic phase boundary in Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 lead-free solid solution
DOI:10.1063/1.4899125  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhang, Le;Zhang, Ming;Wang, Liang;Zhou, Chao;Zhang, Zhen;Yao, Yonggang;Zhang, Lixue;Xue, Dezhen;Lou, Xiaojie;Ren, Xiaobing;
7:1:5:11     Unique single-domain state in a polycrystalline ferroelectric ceramic
DOI:10.1103/PhysRevB.89.100104  JN:PHYSICAL REVIEW B  PY:2014
  TC:4  AU: Guo, Hanzheng;Zhou, Chao;Ren, Xiaobing;Tan, Xiaoli;
7:1:5:12     Relationship between electromechanical properties and phase diagram in the Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 lead-free piezoceramic
DOI:10.1016/j.actamat.2014.07.058  JN:ACTA MATERIALIA  PY:2014
  TC:16  AU: Acosta, Matias;Novak, Nikola;Jo, Wook;Roedel, Juergen;
7:1:5:13     Polarization alignment, phase transition, and piezoelectricity development in polycrystalline 0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3
DOI:10.1103/PhysRevB.90.014103  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Guo, Hanzheng;Voas, Brian K.;Zhang, Shujun;Zhou, Chao;Ren, Xiaobing;Beckman, Scott P.;Tan, Xiaoli;
7:1:5:14     Polymorphic structure evolution and large piezoelectric response of lead-free (Ba,Ca)(Zr,Ti)O-3 ceramics
DOI:10.1063/1.4868414  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Tian, Ye;Chao, Xiaolian;Jin, Li;Wei, Lingling;Liang, Pengfei;Yang, Zupei;
7:1:5:15     Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics
DOI:10.1063/1.4879395  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:8  AU: Brandt, David R. J.;Acosta, Matias;Koruza, Jurij;Webber, Kyle G.;
7:1:5:16     Orientation-dependent piezoelectric properties in lead-free epitaxial 0.5BaZr(0.2)Ti(0.8)O(3)-0.5Ba(0.7)Ca(0.3)TiO(3) thin films
DOI:10.1063/1.4821918  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Luo, B. C.;Wang, D. Y.;Duan, M. M.;Li, S.;
7:1:5:17     Phase Transition Behavior and Large Piezoelectricity Near the Morphotropic Phase Boundary of Lead-Free (Ba0.85Ca0.15)(Zr0.1Ti0.9)O-3 Ceramics
DOI:10.1111/jace.12049  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:27  AU: Tian, Ye;Wei, Lingling;Chao, Xiaolian;Liu, Zonghuai;Yang, Zupei;
7:1:5:18     Growth and characterization of lead-free piezoelectric BaZr0.2Ti0.8O3-Ba0.7Ca0.3TiO3 thin films on Si substrates
DOI:10.1016/j.apsusc.2013.01.033  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:7  AU: Luo, B. C.;Wang, D. Y.;Duan, M. M.;Li, S.;
7:1:5:19     Effect of sintering temperature on dielectric, piezoelectric and ferroelectric properties of BZT-BCT 50/50 ceramics
DOI:10.1016/j.jallcom.2012.08.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:20  AU: Mishra, P.;Sonia;Kumar, P.;
7:1:5:20     Phase Diagram and Enhanced Piezoelectric Response of Lead-Free BaTiO3-CaTiO3-BaHfO3 System
DOI:10.1111/jace.13137  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Wang, Dali;Jiang, Zhaohua;Yang, Bin;Zhang, Shantao;Zhang, Mingfu;Guo, Feifei;Cao, Wenwu;
7:1:5:21     Polarization dynamics across the morphotropic phase boundary in Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 ferroelectrics
DOI:10.1063/1.4824730  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Zhukov, Sergey;Genenko, Yuri A.;Acosta, Matias;Humburg, Heide;Jo, Wook;Roedel, Juergen;von Seggern, Heinz;
7:1:5:22     In situ electric field induced domain evolution in Ba(Zr0.2Ti0.8)O-3-0.3(Ba0.7Ca0.3)TiO3 ferroelectrics
DOI:10.1063/1.48960481  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zakhozheva, M.;Schmitt, L. A.;Acosta, M.;Jo, W.;Roedel, J.;Kleebe, H. -J.;
7:1:5:23     Reduction of the piezoelectric performance in lead-free (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 piezoceramics under uniaxial compressive stress
DOI:10.1063/1.4768273  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:17  AU: Ehmke, Matthias C.;Daniels, John;Glaum, Julia;Hoffman, Mark;Blendell, John E.;Bowman, Keith J.;
7:1:5:24     Crystallization, phase evolution and ferroelectric properties of sol-gel-synthesized Ba(Ti0.8Zr0.2)O-3-x(Ba0.7Ca0.3)TiO3 thin films
DOI:10.1039/c2tc00020b  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:18  AU: Wang, Zeng-mei;Zhao, Kuan;Guo, Xin-li;Sun, Wei;Jiang, Hua-long;Han, Xue-qin;Tao, Xu-tang;Cheng, Zhen-xiang;Zhao, Hong-yang;Kimura, Hideo;Yuan, Guo-liang;Yin, Jiang;Liu, Zhi-guo;
7:1:5:25     Temperature driven nano-domain evolution in lead-free Ba(Zr0.2Ti0.8)O-3-50(Ba0.7Ca0.3)TiO3 piezoceramics
DOI:10.1063/1.4891756  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Lu, Shengbo;Xu, Zhengkui;Su, Shi;Zuo, Ruzhong;
7:1:5:26     Major contributor to the large piezoelectric response in (1-x)Ba(Zr0.2Ti0.8)O-3 - x(Ba0.7Ca0.3)TiO3 ceramics: Domain wall motion
DOI:10.1063/1.4885675  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Gao, Jinghui;Hu, Xinghao;Zhang, Le;Li, Fei;Zhang, Lixue;Wang, Yu;Hao, Yanshuang;Zhong, Lisheng;Ren, Xiaobing;
7:1:5:27     Temperature-Dependent Poling Behavior of Lead-free BZT-BCT Piezoelectrics
DOI:10.1111/j.1551-2916.2011.04758.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:27  AU: Li, Binzhi;Blendell, John E.;Bowman, Keith J.;
7:1:5:28     Linking large piezoelectric coefficients to highly flexible polarization of lead free BaTiO3-CaTiO3-BaZrO3 ceramics
DOI:10.1063/1.3599854  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:25  AU: Benabdallah, F.;Simon, A.;Khemakhem, H.;Elissalde, C.;Maglione, M.;
7:1:5:29     Symmetry determination on Pb-free piezoceramic 0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3 using convergent beam electron diffraction method
DOI:10.1063/1.4864130  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:13  AU: Gao, Jinghui;Zhang, Lixue;Xue, Dezhen;Kimoto, Takayoshi;Song, Minghui;Zhong, Lisheng;Ren, Xiaobing;
7:1:5:30     Thermodynamics of Ferroelectric Solid Solutions with Morphotropic Phase Boundaries
DOI:10.1111/jace.12979  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Heitmann, Adam A.;Rossetti, George A., Jr.;
7:1:5:31     Adaptive ferroelectric state at morphotropic phase boundary: Coexisting tetragonal and rhombohedral phases
DOI:10.1016/j.actamat.2014.03.007  JN:ACTA MATERIALIA  PY:2014
  TC:7  AU: Zhang, Yang;Xue, Dezhen;Wu, Haijun;Ding, Xiangdong;Lookman, Turab;Ren, Xiaobing;
7:1:5:32     Stress, temperature and electric field effects in the lead-free (Ba,Ca)(Ti,Zr)O-3 piezoelectric system
DOI:10.1016/j.actamat.2014.06.005  JN:ACTA MATERIALIA  PY:2014
  TC:11  AU: Ehmke, Matthias C.;Schader, Florian H.;Webber, Kyle G.;Roedel, Juergen;Blendell, John E.;Bowman, Keith J.;
7:1:5:33     Synthesis and characterization of lead-free 0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3 ceramic
DOI:10.1063/1.4808338  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:17  AU: Coondoo, Indrani;Panwar, Neeraj;Amorin, Harvey;Alguero, Miguel;Kholkin, A. L.;
7:1:5:34     Structure, dielectric, ferroelectric, and optical properties of (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 thin films prepared by sol-gel method
DOI:10.1016/j.tsf.2011.12.030  JN:THIN SOLID FILMS  PY:2012
  TC:25  AU: Lin, Yanting;Wu, Guangheng;Qin, Ni;Bao, Dinghua;
7:1:5:35     Resolving structural contributions to the electric-field-induced strain in lead-free (1-x)Ba(Zr0.2Ti0.8)O-3 - x(Ba0.7Ca0.3)TiO3 piezoceramics
DOI:10.1016/j.actamat.2013.11.021  JN:ACTA MATERIALIA  PY:2014
  TC:6  AU: Ehmke, Matthias C.;Khansur, Neamul H.;Daniels, John E.;Blendell, John E.;Bowman, Keith J.;
7:1:5:36     In Situ X-ray Diffraction of Biased Ferroelastic Switching in Tetragonal Lead-free (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 Piezoelectrics
DOI:10.1111/jace.12424  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Ehmke, Matthias C.;Glaum, Julia;Hoffman, Mark;Blendell, John E.;Bowman, Keith J.;
7:1:5:37     Piezoelectric properties of 0.5(Ba0.7Ca0.3TiO3)-0.5[Ba(Zr0.2Ti0.8)O-3] ferroelectric lead-free laser deposited thin films
DOI:10.1063/1.3572056  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:25  AU: Piorra, A.;Petraru, A.;Kohlstedt, H.;Wuttig, M.;Quandt, E.;
7:1:5:38     Microstructure at morphotropic phase boundary in Pb(Mg1/3Nb2/3)O-3-PbTiO3 ceramic: Coexistence of nano-scaled {110}-type rhombohedral twin and {110}-type tetragonal twin
DOI:10.1063/1.4745935  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:13  AU: Wu, Haijun;Xue, Dezhen;Lv, Duchao;Gao, Jinghui;Guo, Shengwu;Zhou, Yumei;Ding, Xiangdong;Zhou, Chao;Yang, Sen;Yang, Yaodong;Ren, Xiaobing;
7:1:5:39     The Effect of Electric Poling on the Performance of Lead-Free (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 Piezoceramics
DOI:10.1111/jace.12586  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Ehmke, Matthias C.;Glaum, Julia;Hoffman, Mark;Blendell, John E.;Bowman, Keith J.;
7:1:5:40     Domain wall motion and electromechanical strain in lead-free piezoelectrics: Insight from the model system (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 using in situ high-energy X-ray diffraction during application of electric fields
DOI:10.1063/1.4870934  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:11  AU: Tutuncu, Goknur;Li, Binzhi;Bowman, Keith;Jones, Jacob L.;
7:1:5:41     In-situ X-ray diffraction study of stress-induced phase transition of (1-x)BaZr0.2Ti0.8O3-xBa(0.7)Ca(0.3)TiO(3) in polymer matrix composite
DOI:10.1016/j.matchemphys.2014.03.049  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:1  AU: Wang, W.;Li, W. L.;Feng, Y.;Hou, Y. F.;Xu, D.;Wang, M.;Fei, W. D.;
7:1:5:42     Structure, dielectric, ferroelectric, and energy density properties of (1-x)BZT-xBCT ceramic capacitors for energy storage applications
DOI:10.1007/s10853-012-6990-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:13  AU: Puli, Venkata Sreenivas;Pradhan, Dhiren K.;Chrisey, Douglas B.;Tomozawa, M.;Sharma, G. L.;Scott, J. F.;Katiyar, Ram S.;
7:1:5:43     Phase transition behavior and high piezoelectric properties in lead-free BaTiO3-CaTiO3-BaHfO3 ceramics
DOI:10.1007/s10853-013-7650-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:4  AU: Wang, Dali;Jiang, Zhaohua;Yang, Bin;Zhang, Shantao;Zhang, Mingfu;Guo, Feifei;Cao, Wenwu;
7:1:5:44     Continuous cross-over from ferroelectric to relaxor state and piezoelectric properties of BaTiO3-BaZrO3-CaTiO3 single crystals
DOI:10.1063/1.4870933  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Benabdallah, F.;Veber, P.;Prakasam, M.;Viraphong, O.;Shimamura, K.;Maglione, M.;
7:1:5:45     Correlation Between Piezoelectric Properties and Phase Coexistence in (Ba,Ca)(Ti,Zr)O-3 Ceramics
DOI:10.1111/jace.13047  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Zhang, Yichi;Glaum, Julia;Groh, Claudia;Ehmke, Matthias C.;Blendell, John E.;Bowman, Keith J.;Hoffman, Mark J.;
7:1:5:46     Spectroscopic ellipsometry study of 0.5BaZr(0.2)Ti(0.8)O(3)-0.5Ba(0.7)Ca(0.3)TiO(3) ferroelectric thin films
DOI:10.1016/j.jallcom.2014.06.186  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Wang, Hongguang;Xu, Jinbao;Ma, Chao;Xu, Fanglong;Wang, Lei;Bian, Liang;Chang, Aimin;
7:1:5:47     (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 Ferroelectric Thin Films Prepared from Chemical Solutions
DOI:10.1111/j.1551-2916.2011.04877.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:13  AU: Kang, Guangqing;Yao, Kui;Wang, John;
7:1:5:48     Polymorphic phase boundaries and enhanced piezoelectric response in extended composition range in the lead free ferroelectric BaTi1-xZrxO3
DOI:10.1063/1.4812472  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:11  AU: Kalyani, Ajay Kumar;Senyshyn, Anatoliy;Ranjan, Rajeev;
7:1:5:49     Elastic response of (1-x)Ba(Ti0.8Zr0.2)O-3 - x(Ba0.7Ca0.3)TiO3 (x=0.45-0.55) and the role of the intermediate orthorhombic phase in enhancing the piezoelectric coupling
DOI:10.1063/1.4903807  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Cordero, F.;Craciun, F.;Dinescu, M.;Scarisoreanu, N.;Galassi, C.;Schranz, W.;Soprunyuk, V.;
7:1:5:50     Phase transitions in (1-x)BaZr0.2Ti0.8O3-xBa(0.7)Ca(0.3)TiO(3) powders and ceramic pellets
DOI:10.1016/j.ceramint.2013.08.037  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Wang, W.;Li, W. L.;Xu, D.;Cao, W. P.;Hou, Y. F.;Fei, W. D.;
7:1:5:51     Piezoelectric properties of BaTiO3-CaTiO3-BaZrO3 ceramics with compositions near the morphotropic phase boundary
DOI:10.1016/j.ceramint.2014.06.086  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Wang, W.;Wang, L. D.;Li, W. L.;Xu, D.;Hou, Y. F.;Cao, W. P.;Feng, Y.;Fei, W. D.;
7:1:5:52     Effects of poling over the orthorhombic-tetragonal phase transition temperature in compositionally homogeneous (K, Na)NbO3-based ceramics
DOI:10.1063/1.3573790  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Morozov, M. I.;Kungl, H.;Hoffmann, M. J.;
7:1:5:53     Microstructures and electrical properties of 0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O-3 thin films prepared by a sol gel route
DOI:10.1016/j.ceramint.2013.04.001  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Chi, Q. G.;Zhu, H. F.;Xu, J. C.;Wang, X.;Lin, J. Q.;Sun, Z.;Chen, Y.;Lei, Q. Q.;
7:1:5:54     Effects of tricritical points and morphotropic phase boundaries on the piezoelectric properties of ferroelectrics
DOI:10.1103/PhysRevB.83.174108  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Porta, Marcel;Lookman, Turab;
7:1:5:55     Polarization switching characteristics of 0.5BaTi(0.8)Zr(0.2)O(3)-0.5Ba(0.7)Ca(0.3)TiO(3) lead free ferroelectric thin films by pulsed laser deposition
DOI:10.1063/1.4871673  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Kolekar, Y. D.;Bhaumik, A.;Shaikh, P. A.;Ramana, C. V.;Ghosh, K.;
7:1:5:56     Intrinsic electromechanical properties of ferroelectric ceramics with the coexistence of tetragonal and rhombohedral phases near the morphotropic phase boundary
DOI:10.1063/1.4895896  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Wu, Yugong;Hou, Jiankun;
7:1:5:57     Effect of crystallographic orientation in textured Ba0.92Ca0.08TiO3 piezoelectric ceramics
DOI:10.1063/1.4896840  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Haugen, Astri Bjornetun;Morozov, Maxim I.;Johnsson, Mats;Grande, Tor;Einarsrud, Mari-Ann;
7:1:5:58     Largely enhanced electromechanical properties of BaTiO3-(Na0.5Er0.5)TiO3 lead-free piezoelectric ceramics
DOI:10.1063/1.4893610  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Jun;Chai, Xiaona;Peng, Dengfeng;Zou, Hue;Wang, Xusheng;Yao, Xi;
7:1:5:59     Dielectric relaxor behaviors and tunability of (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 thin films fabricated by sol-gel method
DOI:10.1007/s00339-012-7110-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:4  AU: Lin, Yanting;Qin, Ni;Wu, Guangheng;Sa, Tongliang;Bao, Dinghua;
7:1:5:60     Enhanced dielectric and piezoelectric properties of BZT-BCT system near MPB
DOI:10.1016/j.ceramint.2014.06.001  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Mishra, P.;Sonia;Kumar, P.;
7:1:5:61     Piezoelectric properties of new ternary Bi-1/2(Na, Li)(1/2)TiO3-(Bi1/2K1/2)TiO3-Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics
DOI:10.1007/s00339-012-7297-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:1  AU: Wu, Jiagang;Qiao, Sha;Zhu, Jianguo;Xiao, Dingquan;
7:1:5:62     Optimizing electrical poling for tetragonal, lead-free BZT-BCT piezoceramic alloys
DOI:10.1016/j.jeurceramsoc.2013.05.032  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Li, Binzhi;Ehmke, Matthias C.;Blendell, John E.;Bowman, Keith J.;
7:1:5:63     Dielectric, ferroelectric, and piezoelectric properties of textured BZT-BCT lead-free thick film by screen printing
DOI:10.1016/j.matlet.2012.05.114  JN:MATERIALS LETTERS  PY:2012
  TC:9  AU: Bai, Wangfeng;Shen, Bo;Fu, Fang;Zhai, Jiwei;
7:1:5:64     Dielectric and piezoelectric properties of low temperature synthesized iso-valent modified BT ceramics
DOI:10.1016/j.ceramint.2012.03.079  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Sharma, Sonia;Kumar, P.;Palei, P.;
7:1:5:65     Nucleation of Rhombohedral Regions Within a Tetragonal Matrix in Mn-Doped Na0.5Bi0.5TiO3 Crystals: Origins of a Diffuse Transformation, Thermal Hysteresis, and Isotropization
DOI:10.1111/j.1551-2916.2010.04083.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:1  AU: Ge, Wenwei;Yao, Jianjun;Luo, Liang;Devreugd, Christopher P.;Li, Jiefang;Viehland, D.;Zhang, Qinhui;Luo, Haosu;
7:1:5:66     Morphotropic phase boundary tailoring of PZST-PMN system by compositional variation for shape memory effect
DOI:10.1016/j.matchemphys.2010.03.072  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:2  AU: Pathak, Abhishek;Prakash, Chandra;Chatterjee, Ratnamala;
7:1:5:67     Evidence for a tricritical point coinciding with the triple point in (Pb0.94Sr0.06)(ZrxTi1-x)O-3: A combined synchrotron x-ray diffraction, dielectric, and Landau theory study
DOI:10.1103/PhysRevB.88.184109  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:1:5:68     Symmetry of piezoelectric (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (x=0.31) single crystal at different length scales in the morphotropic phase boundary region
DOI:10.1103/PhysRevB.86.184113  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;Unusual temperature dependence of the spectral weight near the Fermi;level of NdNiO3 thin films;PHYSICAL REVIEW B;86;19;195147;10.1103/PhysRevB.86.195147;NOV 30 2012;2012;We investigate the behavior of the spectral weight near the Fermi level;of NdNiO3 thin films as a function of temperature across the;metal-to-insulator transition (MIT) by means of ultraviolet;photoelectron spectroscopy. The spectral weight was found to exhibit;thermal hysteresis, similar to that of the dc conductivity. A detailed;analysis of the temperature dependence reveals two distinct regimes of;spectral loss close to the Fermi level. The temperature evolution of one;regime is found to be independent of the MIT.;Garcia-Fernandez, Mirian/B-6018-2013; Zubko, Pavlo/B-5496-2009;Zubko, Pavlo/0000-0002-7330-3163;2;0;0;0;2;1098-0121;WOS:000311715000006;;;J;Sen, Arnab;Damle, Kedar;Moessner, R.;Vacancy-induced spin textures and their interactions in a classical spin;liquid;PHYSICAL REVIEW B;86;20;205134;10.1103/PhysRevB.86.205134;NOV 30 2012;2012;Motivated by experiments on the archetypal frustrated magnet;SrCr9pGa12-9pO19 (SCGO), we study the classical Heisenberg model on the;pyrochlore slab (kagome bilayer) lattice with site dilution x = 1 - p.;This allows us to address generic aspects of the physics of nonmagnetic;vacancies in a classical spin liquid. We explicitly demonstrate that the;pure (x = 0) system remains a spin liquid down to the lowest;temperatures, with an unusual nonmonotonic temperature dependence of the;susceptibility, which even turns diamagnetic for the apical spins;between the two kagome layers. For x > 0 but small, the low-temperature;magnetic response of the system is most naturally described in terms of;the properties of spatially extended spin textures that cloak an;"orphan" S = 3/2 Cr3+ spin in direct proximity to a pair of missing;sites belonging to the same triangular simplex. In the T -> 0 limit,;these orphan-texture complexes each carry a net magnetization that is;exactly half the magnetic moment of an individual spin of the undiluted;system. Furthermore, we demonstrate that they interact via an entropic;temperature-dependent pairwise exchange interaction J(eff) (T,(r) over;right arrow) similar to T J ((r) over right arrow root T) that has a;logarithmic form at short distances and decays exponentially beyond a;thermal correlation length xi(T) similar to 1/root T. The sign of J(eff);depends on whether the two orphan spins belong to the same kagome layer;or not. We provide a detailed analytical account of these properties;using an effective field theory approach specifically tailored for the;problem at hand. These results are in quantitative agreement with;large-scale Monte Carlo numerics.;3;1;0;0;3;1098-0121;WOS:000311715100008;;;J;Solanki, Ravindra Singh;Mishra, S. K.;Senyshyn, Anatoliy;Ishii, I.;Moriyoshi, Chikako;Suzuki, Takashi;Kuroiwa, Yoshihiro;Pandey, Dhananjai;Antiferrodistortive phase transition in pseudorhombohedral;(Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and;neutron powder diffraction study;PHYSICAL REVIEW B;86;17;174117;10.1103/PhysRevB.86.174117;NOV 30 2012;2012;The controversies about the structure of the true ground state of;pseudorhombohedral compositions of Pb(ZrxTi1-x)O-3 (PZT) are addressed;using a 6% Sr2+ substituted sample with x = 0.550. Sound velocity;measurements reveal a phase transition at T-c similar to 279 K. The;temperature dependence of full width at half maximum of (h00)(pc) peaks;and the unit cell volume also show anomalies around 279 K even though;there is no indication of any change of space group in the synchrotron;x-ray powder diffraction (SXRD) patterns. The neutron powder diffraction;patterns reveal appearance of superlattice peaks below T-c similar to;279 K, confirming the existence of an antiferrodistortive phase;transition. The Rietveld analysis of the room-temperature and;low-temperature SXRD data below T-c shows that the structure corresponds;to single monoclinic phase in the Cm space group while the analysis of;neutron powder diffraction data reveals that the structure of the;ground-state phase below T-c corresponds to the Cc space group. Our;analysis shows that the structural models for the ground-state phase;based on the R3c space group with or without the coexistence of the;room-temperature monoclinic phase in the Cm space group can be rejected.;SOLANKI, RAVINDRA /H-7221-2013; Senyshyn, Anatoliy/C-8267-2014;Senyshyn, Anatoliy/0000-0002-1473-8992;3;0;0;0;3;1098-0121;WOS:000311714600001;;;J;Steinke, N. -J.;Moore, T. A.;Mansell, R.;Bland, J. A. C.;Barnes, C. H. W.;Nonuniversal dynamic magnetization reversal in the Barkhausen-dominated;and mesofrequency regimes;PHYSICAL REVIEW B;86;18;184434;10.1103/PhysRevB.86.184434;NOV 30 2012;2012;Dynamic magnetization reversal in the mesofrequency range is studied by;ac magneto-optical Kerr effect (ac-MOKE) and ac anisotropic;magnetoresistance (ac-AMR) magnetometry in a series of epitaxial and;polycrystalline thin magnetic films. The dynamic coercive field was;found to scale as a power law with scaling exponents <= 1/2 depending on;the ferromagnetic material. In addition, there is a low sweep rate;regime in which the dynamic coercivity reaches a minimum. These findings;are explained in the context of reversal proceeding by motion of a few;domain walls (similar to 1). At dc and low field sweep rates the;reversal proceeds between local pinning sites via Barkhausen avalanches;and the overall reversal speed is strongly dependent on the field sweep;rate. At higher field sweep rates a continuous motion regime is entered;in which the reversal velocity depends linearly on the applied field;sweep rate and only an average pinning force is experienced by the wall.;The fit of the dynamic coercivity vs applied field sweep rate allows the;determination of the average nonlocal pinning field. The nonuniversal;scaling exponent can be explained using recently developed models and;introducing a field rate-dependent number of active domain walls.;Mansell, Rhodri/A-1450-2013;2;0;0;0;2;1098-0121;WOS:000311714700003;;;J;Stoffel, M.;Fagot-Revurat, Y.;Tejeda, A.;Kierren, B.;Nicolaou, A.;Le Fevre, P.;Bertran, F.;Taleb-Ibrahimi, A.;Malterre, D.;Electron-phonon coupling on strained Ge/Si(111)-(5x5) surfaces;PHYSICAL REVIEW B;86;19;195438;10.1103/PhysRevB.86.195438;NOV 30 2012;2012;We investigate the structural and electronic properties of strained;Ge/Si(111)-(5 x 5) surfaces by means of scanning tunneling microscopy;and high-resolution angle-resolved photoemission spectroscopy. The;homogeneous (5 x 5) reconstructed overlayers are characterized by three;electronic surface states, similar to the Si(111)-(7 x 7) surface. The;dispersion of the dangling bond related surface state exhibits the same;periodicity as that of the (5 x 5) reconstruction. Moreover, a careful;analysis of the shape and width of this surface state provides striking;evidence of electron-phonon coupling at low temperatures. By considering;the spectral function within a simple Debye model, we determine both the;Debye energy and the electron-phonon coupling strength. The latter value;is further confirmed by analyzing the temperature-dependent phonon;broadening of the dangling bond related surface state linewidth.;BERTRAN, Francois/B-7515-2008; Tejeda, Antonio/C-4711-2014;BERTRAN, Francois/0000-0002-2416-0514; Tejeda,;Antonio/0000-0003-0125-4603;1;0;0;0;1;1098-0121;WOS:000311715000012;;;J;Turek, I.;Kudrnovsky, J.;Carva, K.;Magnetic anisotropy energy of disordered tetragonal Fe-Co systems from;ab initio alloy theory;PHYSICAL REVIEW B;86;17;174430;10.1103/PhysRevB.86.174430;NOV 30 2012;2012;We present results of systematic fully relativistic first-principles;calculations of the uniaxial magnetic anisotropy energy (MAE) of a;disordered and partially ordered tetragonal Fe-Co alloy using the;coherent potential approximation (CPA). This alloy has recently become a;promising system for thin ferromagnetic films with a perpendicular;magnetic anisotropy. We find that existing theoretical approaches to;homogeneous random bulk Fe-Co alloys, based on a simple virtual crystal;approximation (VCA), overestimate the maximum MAE values obtained in the;CPA by a factor of 4. This pronounced difference is ascribed to the;strong disorder in the minority spin channel of real alloys, which is;neglected in the VCA and which leads to a broadening of the d-like;eigenstates at the Fermi energy and to the reduction of the MAE. The;ordered Fe-Co alloys with a maximum L1(0)-like atomic long-range order;can exhibit high values of the MAE, which, however, get dramatically;reduced by small perturbations of the perfect order.;Carva, Karel/A-3703-2008; Turek, Ilja/G-5553-2014; KUDRNOVSKY, Josef/G-5581-2014;KUDRNOVSKY, Josef/0000-0002-9968-6748;10;0;0;0;10;1098-0121;WOS:000311714600004;;;J;Uppstu, Andreas;Harju, Ari;High-field magnetoresistance revealing scattering mechanisms in graphene;PHYSICAL REVIEW B;86;20;201409;10.1103/PhysRevB.86.201409;NOV 30 2012;2012;We show that the type of charge carrier scattering significantly affects;the high-field magnetoresistance of graphene nanoribbons. This effect;has the potential to be used in identifying the scattering mechanisms in;graphene. The results also provide an explanation for the experimentally;found, intriguing differences in the behavior of the magnetoresistance;of graphene Hall bars placed on different substrates. Additionally, our;simulations indicate that the peaks in the longitudinal resistance tend;to become pinned to fractionally quantized values, as different;transport modes have very different scattering properties.;Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;1;0;0;0;1;1098-0121;WOS:000311715100004;;;J;White, Alexander J.;Sukharev, Maxim;Galperin, Michael;Molecular nanoplasmonics: Self-consistent electrodynamics in;current-carrying junctions;PHYSICAL REVIEW B;86;20;205324;10.1103/PhysRevB.86.205324;NOV 30 2012;2012;We consider a biased molecular junction subjected to an external;time-dependent electromagnetic field. We discuss local field formation;due to both surface plasmon-polariton excitations in the contacts and;the molecular response. Employing realistic parameters we demonstrate;that such self-consistent treatment is crucial for the proper;description of the junction transport characteristics.;White, Alexander/D-8754-2014;White, Alexander/0000-0002-7771-3899;3;0;0;0;3;1098-0121;WOS:000311715100010;;;J;Wierschem, Keola;Kato, Yasuyuki;Nishida, Yusuke;Batista, Cristian D.;Sengupta, Pinaki;Magnetic and nematic orderings in spin-1 antiferromagnets with;single-ion anisotropy;PHYSICAL REVIEW B;86;20;201108;10.1103/PhysRevB.86.201108;NOV 30 2012;2012;We study a spin-1 Heisenberg model with exchange interaction J, uniaxial;single-ion exchange anisotropy D, and Zeeman coupling to a magnetic;field B parallel to the symmetry axis. We compute the (D/J, B/J) quantum;phase diagram for square and simple cubic lattices by combining;analytical and quantum Monte Carlo approaches, and find a transition;between XY antiferromagnetic and ferronematic phases that spontaneously;break the U(1) symmetry of the model. In the language of bosonic gases,;this is a transition between a Bose-Einstein condensate (BEC) of single;bosons and a BEC of pairs. Our work opens up new avenues for measuring;this transition in real magnets.;8;0;0;0;8;1098-0121;WOS:000311715100001;;;J;Wu, Chien-Te;Valls, Oriol T.;Halterman, Klaus;Proximity effects in conical-ferromagnet/superconductor bilayers;PHYSICAL REVIEW B;86;18;184517;10.1103/PhysRevB.86.184517;NOV 30 2012;2012;We present a study of various aspects of proximity effects in F/S;(ferromagnet/superconductor) bilayers, where F has a spiral magnetic;texture such as that found in holmium, erbium, and other materials, and;S is a conventional s-wave superconductor. We numerically solve the;Bogoliubov-de Gennes (BdG) equations self-consistently and use the;solutions to compute physical quantities relevant to the proximity;effects in these bilayers. We obtain the relation between the;superconducting transition temperature T-c and the thicknesses d(F) of;the magnetic layer by solving the linearized BdG equations. We find that;the T-c (d(F)) curves include multiple oscillations. Moreover, the;system may be reentrant not only with d(F), as is the case when the;magnet is uniform, but also with temperature T : the superconductivity;disappears in certain ranges of d(F) or T. The T reentrance reported;here occurs when d(F) is larger than the spatial period of the conical;exchange field. We compute the condensation free energies and entropies;from the full BdG equations and find the results are in agreement with;T-c values obtained by linearization. The inhomogeneous nature of the;magnet makes it possible for all odd triplet pairing components to be;induced. We have investigated their properties and found that, as;compared to the singlet amplitude, both the m = 0 and +/- 1 triplet;components exhibit long-range penetration. For nanoscale bilayers, the;proximity lengths for both layers are also obtained. These lengths;oscillate with d(F) and they are found to be long range on both sides.;These results are shown to be consistent with recent experiments. We;also calculate the reverse proximity effect described by the;three-dimensional local magnetization, and the local density of states,;which reveals important energy-resolved signatures associated with the;proximity effects.;6;0;0;0;6;1098-0121;WOS:000311714700005;;;J;Altarelli, M.;Kurta, R. P.;Vartanyants, I. A.;X-ray cross-correlation analysis and local symmetries of disordered;systems: General theory (vol 82, 104207, 2010);PHYSICAL REVIEW B;86;17;179904;10.1103/PhysRevB.86.179904;NOV 29 2012;2012;1;0;0;0;1;1098-0121;WOS:000311693600006;;;J;Beheshtian, J.;Sadeghi, A.;Neek-Amal, M.;Michel, K. H.;Peeters, F. M.;Induced polarization and electronic properties of carbon-doped boron;nitride nanoribbons;PHYSICAL REVIEW B;86;19;195433;10.1103/PhysRevB.86.195433;NOV 29 2012;2012;The electronic properties of boron nitride nanoribbons (BNNRs) doped;with a line of carbon atoms are investigated using density functional;calculations. By replacing a line of alternating B and N atoms with;carbons, three different configurations are possible depending on the;type of the atoms which bond to the carbons. We found very different;electronic properties for these configurations: (i) the NCB arrangement;is strongly polarized with a large dipole moment having an unexpected;direction, (ii) the BCB and NCN arrangements are nonpolar with zero;dipole moment, (iii) the doping by a carbon line reduces the band gap;regardless of the local arrangement of the borons and the nitrogens;around the carbon line, and (iv) the polarization and energy gap of the;carbon-doped BNNRs can be tuned by an electric field applied parallel to;the carbon line. Similar effects were found when either an armchair or;zigzag line of carbon was introduced.;Sadeghi, Ali/D-1554-2013;8;0;0;0;8;1098-0121;WOS:000311694200006;;;J;Chi, Hang;Kim, Hyoungchul;Thomas, John C.;Su, Xianli;Stackhouse, Stephen;Kaviany, Massoud;Van der Ven, Anton;Tang, Xinfeng;Uher, Ctirad;Configuring pnicogen rings in skutterudites for low phonon conductivity;PHYSICAL REVIEW B;86;19;195209;10.1103/PhysRevB.86.195209;NOV 29 2012;2012;Dominant heat-carrying modes in skutterudites are associated with;vibrations of the pnicogen rings. Apart from filling the structural;cages with foreign species, disrupting the pnicogen ring structure by;substitutional alloying should be an effective approach to reduce;thermal conductivity. In this paper we explore alloying configurations;of pnicogen rings (Sb rings in the case of CoSb3) that yield;particularly low values of the thermal conductivity. We find that IV-VI;double substitution (replacing two Sb atoms with one atom each from the;column IV and column VI elements to achieve an average charge of two Sb;atoms) is a very effective approach. Our ab initio calculations, in;combination with a cluster expansion, have allowed us to identify stable;alloy configurations on the Sb rings. Subsequent molecular and lattice;dynamics simulations on low energy configurations establish the range of;atomic displacement parameters and values of the thermal conductivity.;Theoretical results are in good agreement with our experimental thermal;conductivity values. Combining both approaches of compensated double;substitution and filling of structural cages should be an effective way;of improving the thermoelectric figure of merit of skutterudites.;Su, Xianli/A-9685-2012; Chi, Hang/F-1537-2011; Thomas, John/A-2764-2009; Kim, Hyoungchul/F-2557-2014;Chi, Hang/0000-0002-1299-1150; Thomas, John/0000-0002-3162-0152; Kim,;Hyoungchul/0000-0003-3109-660X;8;0;0;0;8;1098-0121;WOS:000311694200003;;;J;Fortmann, C.;Niemann, C.;Glenzer, S. H.;Theory of x-ray scattering in high-pressure electrides;PHYSICAL REVIEW B;86;17;174116;10.1103/PhysRevB.86.174116;NOV 29 2012;2012;We report on a theoretical model for the calculation of x-ray scattering;from high-pressure electrides. By treating interstitial electrons as;effective anions forming a sublattice within the crystal, we explicitly;account for Bragg reflections from the sublattice as well as for;scattering interferences between the ion lattice and the anion;sublattice. The additional reflections and interferences lead to;significant modifications of the static structure factor as compared to;the pure lattices. Our results are important for accurate calculations;of material properties in the high-pressure phase and allow for direct;experimental verification of electride phases in matter at ultrahigh;pressures through angle-resolved x-ray scattering.;2;0;0;0;2;1098-0121;WOS:000311693600001;;;J;Guclu, Caner;Campione, Salvatore;Capolino, Filippo;Hyperbolic metamaterial as super absorber for scattered fields generated;at its surface;PHYSICAL REVIEW B;86;20;205130;10.1103/PhysRevB.86.205130;NOV 29 2012;2012;We show that hyperbolic metamaterials (HMs) that exhibit hyperbolic;wave-vector dispersion diagrams possess two important features related;to super absorption: The total power scattered by a nanosphere is (i);greatly enhanced when placed at the HM surface, compared to other;material surfaces, and (ii) almost totally directed into the HM. We show;that these two features are peculiar of HM interfaces, and we support;them using a spectral theory study of transverse-electric and magnetic;waves scattered by a subwavelength nanosphere. We analyze the;nanosphere's scattered power absorbed by various substrate;configurations. We also consider various nanosphere materials.;22;0;0;0;22;1098-0121;WOS:000311694300002;;;J;Hebbache, M.;Entanglement of electron spins and geometric phases in the diamond color;center coupled to the P1 center;PHYSICAL REVIEW B;86;19;195316;10.1103/PhysRevB.86.195316;NOV 29 2012;2012;Impurity spins in semiconductors are potential quantum bits.;Entanglement and topological phases are key resources in quantum;computation. We prove that the coupled electron spins carried by a;diamond nitrogen-vacancy color center (NV-) and a single substitutional;nitrogen impurity (P1 center) are entangled in the immediate vicinity of;the level anticrossing that appears in the Zeeman energy diagram at;about 500 G. We also determine the Aharonov-Anandan, Berry, and marginal;geometric phases that can be accumulated by the state vectors of this;spin system when it is magnetically transported around a closed path. At;the resonance where the gap between two energy levels is minimum, the;geometric phases undergo discontinuities, and the entanglement of the;two electron spins is maximal.;2;0;0;0;2;1098-0121;WOS:000311694200004;;;J;Kerdsongpanya, Sit;Alling, Bjorn;Eklund, Per;Effect of point defects on the electronic density of states of ScN;studied by first-principles calculations and implications for;thermoelectric properties;PHYSICAL REVIEW B;86;19;195140;10.1103/PhysRevB.86.195140;NOV 29 2012;2012;We have investigated the effect of defects and impurities on the;electronic density of states of scandium nitride using first-principles;calculations with the generalized gradient approximation and hybrid;functionals for the exchange correlation energy. Our results show that;Sc and N vacancies can introduce asymmetric peaks in the density of;states close to the Fermi level. We also find that the N vacancy states;are sensitive to total electron concentration of the system due to their;possibility for spin polarization. Substitutional point defects shift;the Fermi level in the electronic band according to their valence but do;not introduce sharp features. The energetics and electronic structure of;defect pairs are also studied. By using hybrid functional calculations,;a correct description of the band gap of scandium nitride is obtained.;Our results envisage ways for improving the thermoelectric figure of;merit of ScN by electronic structure engineering through stoichiometry;tuning and doping.;Eklund, Per/B-7677-2011; Alling, Bjorn/I-3193-2012;Eklund, Per/0000-0003-1785-0864; Alling, Bjorn/0000-0001-5863-5605;8;0;0;0;8;1098-0121;WOS:000311694200001;;;J;Kim, Jiseok;Fischetti, Massimo V.;Aboud, Shela;Structural, electronic, and transport properties of silicane nanoribbons;PHYSICAL REVIEW B;86;20;205323;10.1103/PhysRevB.86.205323;NOV 29 2012;2012;Silicane ribbons do not suffer from aromatic dependence of the band gap;making them a more promising candidate for near-term nanoelectronic;application compared to armchair graphene nanoribbons. The structural,;electronic, and transport properties of free-standing sp(3)-hybridized;armchair- and zigzag-edge silicane nanoribbons have been investigated;using ab initio and nonlocal empirical pseudopotential calculations.;Under ambient conditions, two-dimensional silicane sheets will;spontaneously break into stable one-dimensional ribbons similar to;density functional theory studies of graphene ribbons. The calculated;low-field electron mobility and ballistic conductance show a strong edge;dependence, due to differences in the effective mass and momentum;relaxation rates along the two transport directions. The mobility in;zigzag-edge ribbons is found to be approximately twenty times higher;than in armchair-edge ribbons.;7;0;0;0;7;1098-0121;WOS:000311694300004;;;J;Kim, Kyou-Hyun;Payne, David A.;Zuo, Jian-Min;
7:1:5:69     In-situ observation of nanomechanical behavior arising from critical-temperature-induced phase transformation in Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3 thin film
DOI:10.1063/1.4818121  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Wang, Z. M.;Cai, Zh. L.;Zhao, K.;Guo, X. L.;Chen, J.;Sun, W.;Cheng, Zh. X.;Kimura, H.;Li, B. W.;Yuan, G. L.;Yin, J.;Liu, Zh. G.;
7:1:5:70     Accurate characterization of thin films on rough surfaces by spectroscopic ellipsometry
DOI:10.1016/j.tsf.2013.07.067  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Siah, S. C.;Hoex, B.;Aberle, G.;
7:1:6:1     Piezoelectric and Dielectric Properties of (Ba1-xCax)(Ti0.95Zr0.05)O-3 Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2010.03907.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:72  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Zang, Guozhong;
7:1:6:2     Correlation Between the Microstructure and Electrical Properties in High-Performance (Ba0.85Ca0.15)(Zr0.1Ti0.9)O-3 Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2012.05146.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:66  AU: Hao, Jigong;Bai, Wangfeng;Li, Wei;Zhai, Jiwei;
7:1:6:3     Enhanced piezoelectric properties of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3 lead-free ceramics by optimizing calcination and sintering temperature
DOI:10.1016/j.jeurceramsoc.2011.04.023  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:82  AU: Wang, Pan;Li, Yongxiang;Lu, Yiqing;
7:1:6:4     Role of room-temperature phase transition in the electrical properties of (Ba, Ca)(Ti, Zr)O-3 ceramics
DOI:10.1016/j.scriptamat.2011.07.028  JN:SCRIPTA MATERIALIA  PY:2011
  TC:62  AU: Wu, Jiagang;Xiao, Dingquan;Wu, Wenjun;Chen, Qiang;Zhu, Jianguo;Yang, Zhengchun;Wang, John;
7:1:6:5     Large piezoelectric effect in Pb-free Ba(Ti,Sn)O-3-x(Ba,Ca)TiO3 ceramics
DOI:10.1063/1.3640214  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:46  AU: Xue, Dezhen;Zhou, Yumei;Bao, Huixin;Gao, Jinghui;Zhou, Chao;Ren, Xiaobing;
7:1:6:6     High piezoelectric d(33) coefficient in (Ba1-xCax)(Ti0.98Zr0.02)O-3 lead-free ceramics with relative high Curie temperature
DOI:10.1016/j.matlet.2010.07.042  JN:MATERIALS LETTERS  PY:2010
  TC:55  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Zang, Guozhong;
7:1:6:7     Enhancement of the temperature stabilities in yttrium doped (Ba0.99Ca0.01)(Ti0.98Zr0.02)O-3 ceramics
DOI:10.1016/j.jallcom.2012.03.110  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:22  AU: Li, Wei;Hao, Jigong;Bai, Wangfeng;Xu, Zhijun;Chu, Ruiqing;Zhai, Jiwei;
7:1:6:8     Phase-transition behavior and piezoelectric properties of lead-free (Ba0.95Ca0.05)(Ti1-xZrx)O-3 ceramics
DOI:10.1016/j.jallcom.2010.06.157  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:55  AU: Zhang, Su-Wei;Zhang, Hailong;Zhang, Bo-Ping;Yang, Sui;
7:1:6:9     Enhancement of the dielectric, piezoelectric, and ferroelectric properties in BiYbO3-modified (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3 lead-free ceramics
DOI:10.1016/j.ceramint.2013.10.010  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Ma, Jiafeng;Liu, Xinyu;Zhou, Changrong;Yuan, Changlai;Li, Wenhua;Jiang, Minhong;
7:1:6:10     Structure Evolution and Electrical Properties of Y3+-Doped Ba1-xCaxZr0.07Ti0.93O3 Ceramics
DOI:10.1111/jace.12900  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Liu, Hairui;Li, Qiang;Li, Yuanyuan;Luo, Nengneng;Shim, Jaeshik;Gao, Jinghan;Yan, Qingfeng;Zhang, Yiling;Chu, Xiangcheng;
7:1:6:11     Enhanced Piezoelectric Properties of (Ba1-xCax)(Ti0.92Sn0.08)O3 Lead-Free Ceramics
DOI:10.1111/jace.12038  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:29  AU: Zhu, Li-Feng;Zhang, Bo-Ping;Zhao, Xiao-Kun;Zhao, Lei;Zhou, Peng-Fei;Li, Jing-Feng;
7:1:6:12     Effect of dwell time during sintering on piezoelectric properties of (Ba0.85Ca0.15)(Ti0.90Zr0.10)O-3 lead-free ceramics
DOI:10.1016/j.jallcom.2011.08.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:31  AU: Wu, Jiagang;Xiao, Dingquan;Wu, Wenjuan;Zhu, Jianguo;Wang, John;
7:1:6:13     Sintering temperature-induced electrical properties of (Ba0.90Ca0.10)(Ti0.85Zr0.15)O-3 lead-free ceramics
DOI:10.1016/j.materresbull.2012.01.032  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:22  AU: Wu, Jiagang;Xiao, Dingquan;Wu, Bo;Wu, Wenjuan;Zhu, Jianguo;Yang, Zhengchun;Wang, John;
7:1:6:14     Improved piezoelectric property and bright upconversion luminescence in Er doped (Ba0.99Ca0.01)(Ti0.98Zr0.02)O-3 ceramics
DOI:10.1016/j.jallcom.2013.08.103  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:10  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Zang, Guozhong;
7:1:6:15     Large Piezoelectric Coefficient in (Ba1-xCax)(Ti0.96Sn0.04)O3 Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2011.04888.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:29  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Zang, Guozhong;
7:1:6:16     Phase structure and nano-domain in high performance of BaTiO3 piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2011.11.014  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:35  AU: Ma, Nan;Zhang, Bo-Ping;Yang, Wei-Gang;Guo, Dong;
7:1:6:17     High piezoelectric properties of BaTiO3-xLiF ceramics sintered at low temperatures
DOI:10.1016/j.jeurceramsoc.2011.10.054  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:23  AU: Yang, Wei-Gang;Zhang, Bo-Ping;Ma, Nan;Zhao, Lei;
7:1:6:18     Phase transition, microstructure, and electrical properties of Ca, Zr, and Sn-modified BaTiO3 lead-free ceramics
DOI:10.1016/j.jallcom.2014.06.177  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Wang, Hui;Wu, Jiagang;
7:1:6:19     Enhanced ferroelectric properties in (Ba1-xCax)(Ti0.94Sn0.06)O-3 lead-free ceramics
DOI:10.1016/j.jeurceramsoc.2011.09.020  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:16  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Zang, Guozhong;
7:1:6:20     High piezoelectric coefficient and temperature stability of Ga2O3-doped (Ba0.99Ca0.01)(Zr0.02Ti0.98)O-3 lead-free ceramics by low-temperature sintering
DOI:10.1016/j.jallcom.2013.07.131  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Ma, Jiafeng;Liu, Xinyu;Li, Wenhua;
7:1:6:21     Lead-free Ba0.9Ca0.1Ti0.9Zr0.1O3 piezoelectric ceramics processed below 1300 degrees C
DOI:10.1016/j.jallcom.2013.08.165  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:7  AU: Reyes-Montero, A.;Pardo, L.;Lopez-Juarez, R.;Gonzalez, A. M.;Cruz, M. P.;Villafuerte-Castrejon, M. E.;
7:1:6:22     Phase transition behavior and electrical properties of lead-free (Ba1-xCax)(Zr0.1Ti0.9)O-3 piezoelectric ceramics
DOI:10.1063/1.4804173  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:14  AU: Tian, Ye;Chao, Xiaolian;Wei, Lingling;Liang, Pengfei;Yang, Zupei;
7:1:6:23     Enlarged polymorphic phase transition boundary and enhanced piezoelectricity in ternary component 0.8Ba(1-x)Ca(x)TiO(3)-0.1BaTi(0.8)Zr(0.2)O(3)-0.1BaTi(0.9)Sn(0.1)O(3) ceramics
DOI:10.1016/j.matlet.2013.08.008  JN:MATERIALS LETTERS  PY:2013
  TC:2  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Zeng, Huarong;Zhao, Kunyu;
7:1:6:24     Polymorphic phase transition and enhanced electrical properties of (Ba0.91Ca0.09-xSrx)(Ti0.92Sn0.08)O-3 lead-free ceramics
DOI:10.1016/j.ceramint.2014.02.008  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Wang, Xiaofang;Chao, Xiaolian;Liang, Pengfei;Wei, Lingling;Yang, Zupei;
7:1:6:25     Lead-free (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3-CeO2 ceramics with high piezoelectric coefficient obtained by low-temperature sintering
DOI:10.1016/j.ceramint.2012.02.063  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:23  AU: Cui, Yerang;Liu, Xinyu;Jiang, Minhong;Zhao, Xiayan;Shan, Xu;Li, Wenhua;Yuan, Changlai;Zhou, Changrong;
7:1:6:26     Grain and the concomitant ferroelectric domain size dependent physical properties of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics fabricated using powders derived from oxalate precursor route
DOI:10.1063/1.4900494  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Bharathi, P.;Varma, K. B. R.;
7:1:6:27     Orthorhombic-tetragonal phase coexistence and piezoelectric behavior in (1-x)(Ba,Ca)(Ti,Sn)O-3-x(Ba,Ca)(Ti,Zr)O-3 lead-free ceramics
DOI:10.1016/j.materresbull.2013.06.035  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:8  AU: Wu, Jiagang;Habibul, Arzigul;Cheng, Xiaojing;Wang, Xiaopeng;Zhang, Binyu;
7:1:6:28     High piezoelectricity due to multiphase coexistence in low-temperature sintered (Ba,Ca)(Ti,Sn)O-3-CuOx ceramics
DOI:10.1063/1.4826933  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Zhou, Peng-Fei;Zhang, Bo-Ping;Zhao, Lei;Zhao, Xiao-Kun;Zhu, Li-Feng;Cheng, Li-Qian;Li, Jing-Feng;
7:1:6:29     Phase transition and high piezoelectricity in (Ba,Ca)(Ti1-xSnx)O-3 lead-free ceramics
DOI:10.1063/1.4818732  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Zhu, Li-Feng;Zhang, Bo-Ping;Zhao, Xiao-Kun;Zhao, Lei;Yao, Fang-Zhou;Han, Xi;Zhou, Peng-Fei;Li, Jing-Feng;
7:1:6:30     Enhanced d(33) value in HfO2-modified (Ba0.98Ca0.02)(Ti0.94Sn0.06)O-3 ceramics
DOI:10.1016/j.jallcom.2013.04.099  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Wu, Jiagang;Wang, Tao;Cheng, Xiaojing;Wang, Xiaopeng;Zhang, Binyu;Zhu, Jianguo;Xiao, Dingquan;
7:1:6:31     Phase Structure and Property Evaluation of (Ba,Ca)(Ti,Sn)O-3 Sintered with Li2CO3 Addition at Low Temperature
DOI:10.1111/jace.12939  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Zhao, Lei;Zhang, Bo-Ping;Zhou, Peng-Fei;Zhao, Xiao-Kun;Zhu, Li-Feng;
7:1:6:32     Dy2O3 Doped (Ba0.85Ca0.15)(Ti0.90Zr0.10)O-3 Ceramics
DOI:10.1080/00150193.2014.874914  JN:FERROELECTRICS  PY:2014
  TC:2  AU: Chen Zhi-Hui;Ding Jian-Ning;Xu Jiu-Jun;Shan Ying-Chun;Qu Jie;Qiu Jian-Hua;
7:1:6:33     Effects of Ca substitution on structure, piezoelectric properties, and relaxor behavior of lead-free Ba(Ti0.9Zr0.1)O-3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2012.06.084  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:12  AU: Ye, Shukai;Fuh, Jerry;Lu, Li;
7:1:6:34     Dielectric Tunability, Dielectric Relaxation, and Impedance Spectroscopic Studies on (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 Lead-Free Ceramics
DOI:10.1111/jace.12265  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Tao, Jun;Yi, Zhiguo;Liu, Yin;Zhang, Mingxu;Zhai, Jiwei;
7:1:6:35     Effect of CuO on the microstructure and electrical properties of Ba0.85Ca0.15Ti0.90Zr0.10O3 piezoceramics
DOI:10.1007/s10853-012-6326-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:19  AU: Chen, Tao;Zhang, Ting;Wang, Guangchang;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;
7:1:6:36     Effects of MnO2 and sintering temperature on microstructure, ferroelectric, and piezoelectric properties of Ba0.85Ca0.15Ti0.90Zr0.10O3 lead-free ceramics
DOI:10.1007/s10853-012-6835-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:11  AU: Jiang, Meng;Lin, Qin;Lin, Dunmin;Zheng, Qiaoji;Fan, Ximing;Wu, Xiaochun;Sun, Hailing;Wan, Yang;Wu, Lang;
7:1:6:37     High piezoelectric d(33) coefficient of lead-free (Ba0.93Ca0.07)(Ti0.95Zr0.05)O-3 ceramics sintered at optimal temperature
DOI:10.1016/j.mseb.2010.09.003  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:30  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Zang, Guozhong;
7:1:6:38     Thermal stability of piezoelectric coefficients in (Ba1-xCax)(Zr0.05Ti0.95)O-3: A lead-free piezoelectric ceramic
DOI:10.1063/1.4802971  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Singh, Gurvinderjit;Tiwari, V. S.;Gupta, P. K.;
7:1:6:39     High piezoelectric coefficient of Pr2O3-doped Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics
DOI:10.1016/j.ceramint.2012.05.008  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:16  AU: Han, Chao;Wu, Jiagang;Pu, Chaohui;Qiao, Sha;Wu, Bo;Zhu, Jianguo;Xiao, Dingquan;
7:1:6:40     Effect of Ho doping on piezoelectric properties of BCZT ceramics
DOI:10.1016/j.ceramint.2011.12.066  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:15  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;An, Peng;
7:1:6:41     Effects of sintering temperature and poling conditions on the electrical properties of Ba0.70Ca0.30TiO3 diphasic piezoelectric ceramics
DOI:10.1016/j.ceramint.2012.09.073  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Li, Cai-Xia;Yang, Bin;Zhang, Shan-Tao;Zhang, Rui;Cao, Wen-Wu;
7:1:6:42     High piezoelectricity of BaTiO3-CaTiO3-BaSnO3 lead-free ceramics
DOI:10.1039/c4tc00155a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:5  AU: Zhu, Li-Feng;Zhang, Bo-Ping;Zhao, Lei;Li, Jing-Feng;
7:1:6:43     Structure and electrical properties of < 001 > textured (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3 lead-free piezoelectric ceramics
DOI:10.1063/1.4730378  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:11  AU: Ye, S. K.;Fuh, J. Y. H.;Lu, L.;
7:1:6:44     Effects of Mn-doping on the properties of (Ba0.92Ca0.08)(Ti0.95Zr0.05)O-3 lead-free ceramics
DOI:10.1016/j.jallcom.2013.04.048  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Jiang, Xiang-Ping;Li, Lu;Chen, Chao;Wang, Xin-Jia;Li, Xiao-Hong;
7:1:6:45     Structure and electrical properties of Li-doped BaTiO3-CaTiO3-BaZrO3 lead-free ceramics prepared by citrate method
DOI:10.1016/j.jallcom.2014.06.046  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Liu, Xing;Zhu, Min;Chen, Zhihui;Fang, Bijun;Ding, Jianning;Zhao, Xiangyong;Xu, Haiqing;Luo, Haosu;
7:1:6:46     Structural and Dielectric Properties of BaTiO3-CaTiO3-SrTiO3 Ternary System Ceramics
DOI:10.1111/j.1551-2916.2009.03493.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:18  AU: Zhang, Lingling;Wang, Xusheng;Liu, Hong;Yao, Xi;
7:1:6:47     Impact of fast microwave sintering on the grain growth, dielectric relaxation and piezoelectric properties on Ba0.18Ca0.02Ti0.09Zr0.10O3 lead-free ceramics prepared by different methods
DOI:10.1016/j.mseb.2014.02.016  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:2  AU: Sun, Zixiong;Pu, Yongping;Dong, Zijing;Hu, Yao;Wang, Peikui;Liu, Xiaoyan;Wang, Zhuo;
7:1:6:48     Effects of CuO addition on the structure and electrical properties of low temperature sintered Ba(Zr,Ti)O-3 lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2013.10.084  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Liang, Dayun;Zhu, Xiaohong;Zhu, Jiliang;Zhu, Jianguo;Xiao, Dingquan;
7:1:6:49     Ferroelectric and piezoelectric properties of [(Ba1-3x/2Bix)(0.85)Ca-0.15](Ti0.90Zr0.10)O-3 lead-free piezoelectric ceramics
DOI:10.1016/j.materresbull.2012.01.017  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:6  AU: Chen, Tao;Zhang, Ting;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;Wang, Guangchang;
7:1:6:50     Y2O3-modified Ba(Ti0.96Sn0.04)O-3 ceramics with improved piezoelectricity and raised Curie temperature
DOI:10.1016/j.materresbull.2014.07.040  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Chen, Mingli;Xu, Zhijun;Chu, Ruiqing;Wang, Zhe;Gao, Shasha;Yu, Guohao;Li, Wei;Gong, Shuwen;Li, Guorong;
7:1:6:51     Enhancing piezoelectric coefficient d(33) in LiF-doped BaTiO3 ceramics by optimizing excess Ba content
DOI:10.1016/j.materresbull.2014.01.018  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Zhu, Li-Feng;Zhang, Bo-Ping;Yang, Wei-Gang;
7:1:6:52     Improving piezoelectric property of BaTiO3-CaTiO3-BaZrO3 lead-free ceramics by doping
DOI:10.1016/j.ceramint.2014.02.082  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Liu, Chunlin;Liu, Xing;Wang, Dan;Chen, Zhihui;Fang, Bijun;Ding, Jianning;Zhao, Xiangyong;Xu, Haiqing;Luo, Haosu;
7:1:6:53     Preparation and Characterization of Mn-Doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O-3 Ceramics
DOI:10.1080/00150193.2014.892376  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Di Loreto, A.;Frattini, A.;Machado, R.;De Sanctis, O.;Stachiotti, M. G.;
7:1:6:54     Temperature Stability in Dy-Doped (Ba0.99Ca0.01)(Ti0.98Zr0.02)O-3 Lead-Free Ceramics with High Piezoelectric Coefficient
DOI:10.1111/j.1551-2916.2011.04744.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Zang, Guozhong;
7:1:6:55     Polymorphic phase transition and enhanced piezoelectric properties in (Ba0.9Ca0.1)(Ti1-xSnx)O-3 lead-free ceramics
DOI:10.1016/j.matlet.2012.12.067  JN:MATERIALS LETTERS  PY:2013
  TC:7  AU: Chen, Mingli;Xu, Zhijun;Chu, Ruiqing;Liu, Yong;Shao, Lin;Li, Wei;Gong, Shuwen;Li, Guorong;
7:1:6:56     Microstructure and electrical properties of (Ba0.85Ca0.15)(1-x)Li-x(Ti0.90Zr0.10)(1-x)NbxO3 ceramics with a low dielectric loss and a low sintering temperature
DOI:10.1016/j.ceramint.2011.12.075  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Chen, Tao;Zhang, Ting;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;Wang, Guangchang;
7:1:6:57     Phase transition, microstructure and electrical properties of Fe doped Ba0.70Ca0.30TiO3 lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2013.04.052  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Li, Cai-Xia;Yang, Bin;Zhang, Shan-Tao;Zhang, Rui;Sun, Ye;Wang, Jun-Jun;Wang, Rui-Xue;Cao, Wen-Wu;
7:1:6:58     Structure, dielectric and piezoelectric properties of Ba0.90Ca0.10Ti1-xSnxO3 lead-free ceramics
DOI:10.1016/j.ceramint.2013.11.147  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Lin, Dunmin;Kwok, K. W.;Chan, H. L. W.;
7:1:6:59     Synthesis and characterization of Ba0.85Ca0.15Ti0.9Zr0.1O3 ceramics by hydrothermal method
DOI:10.1016/j.ceramint.2014.04.166  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Hunpratub, Sitchai;Maensiri, Santi;Chindaprasirt, Prinya;
7:1:6:60     Effect of Zn2+ and Nb5+ Co-Doping on Electrical Properties of BCZT Ceramics by the Seed-Induced Method
DOI:10.1080/00150193.2013.850015  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Parjansri, Piewpan;Pengpat, Kamonpan;Rujijanagul, Gobwute;Tunkasiri, Tawee;Intatha, Uraiwan;Eitssayeam, Sukum;
7:1:6:61     Phase Formation, Dielectric and Ferroelectric Properties of Mn, Al Doped BCZT Ceramics by Molten Salt Method
DOI:10.1080/10584587.2012.737229  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Intatha, Uraiwan;Parjansri, Piewpan;Pengpat, Kamonpan;Rujijanagul, Gobwute;Tunkasiri, Tawee;Eitssayeam, Sukum;
7:1:6:62     Phase Transition and Electrical Properties of Ba0.7Ca0.3TiO3-BiFeO3 Ceramics
DOI:10.1111/j.1551-2916.2012.05398.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Li, Cai-Xia;Yang, Bin;Zhang, Shan-Tao;Wu, Feng-Min;Cao, Wen-Wu;
7:1:6:63     Dielectric and piezoelectric properties and PTC behavior of Ba0.9Ca0.1Ti0.9Zr0.1O3-xLa ceramics prepared by hydrothermal method
DOI:10.1016/j.matlet.2013.12.043  JN:MATERIALS LETTERS  PY:2014
  TC:8  AU: Sun, Zixiong;Pu, Yongping;Dong, Zijing;Hu, Yao;Liu, Xiaoyan;Wang, Peikui;Ge, Meng;
7:1:6:64     Microstructure and electrical properties of (Ba0.98Ca0.02)(Ti0.94Sn0.06)O-3-modified Bi0.51Na0.50TiO3 lead-free ceramics
DOI:10.1016/j.ceramint.2012.04.011  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Wu, Bo;Xiao, Dingquan;Wu, Wenjuan;Zhu, Jianguo;Chen, Qiang;Wu, Jiagang;
7:1:6:65     Effects of Mn and Sr Doping on the Electrical Properties of Lead-Free 0.92BCZT-0.08BZT Ceramics
DOI:10.1080/10584587.2012.737225  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Parjansri, Piewpan;Intatha, Uraiwan;Eitssayeam, Sukum;Pengpat, Kamonpan;Rujijanagul, Gobwute;Tunkasiri, Tawee;
7:1:6:66     Enhanced relaxor ferroelectric behavior of BCZT lead-free ceramics prepared by hydrothermal method
DOI:10.1016/j.matlet.2014.08.138  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Liu, Yuwen;Pu, Yongping;Sun, Zixiong;
7:1:6:67     Effect of microwave sintering on the microstructure and electric properties of (Zn,Mg)TiO3-based multilayer ceramic capacitors
DOI:10.1016/j.jeurceramsoc.2011.12.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Lee, Ying-Chieh;Yeh, Yu-Yuan;Tsai, Pei-Rong;
7:1:6:68     Microstructure design of lead-free piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2012.08.015  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Lee, S. -B.;Key, T. S.;Liang, Z.;Garcia, R. E.;Wang, S.;Tricoche, X.;Rohrer, G. S.;Saito, Y.;Ito, C.;Tani, T.;
7:1:6:69     Low temperature sintering of barium titanate ceramics assisted by addition of lithium fluoride-containing sintering additives
DOI:10.1016/j.jeurceramsoc.2009.07.005  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Naghib-zadeh, Hamid;Glitzky, Carsten;Doerfel, Ilona;Rabe, Torsten;
7:1:6:70     Ba0.85Ca0.15Ti0.90Zr0.10O3 Lead-free Ceramics with a Sintering Aid of MnO
DOI:10.1080/10584587.2013.778757  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:2  AU: Wu, Jiagang;Wang, Zhuo;Zhang, Binyu;Zhu, Jianguo;Xiao, Dingquan;
7:1:6:71     A study on the synthesis of (Ba,Ca)(Ti,Zr)O-3 nano powders using Pechini polymeric precursor method
DOI:10.1016/j.ceramint.2011.08.001  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Hsieh, Tung-Hsien;Yen, Shih-Chao;Ray, Dah-Tong;
7:1:6:72     Strong photoluminescence and piezoelectricity properties in Pr-doped Ba(Zr0.2Ti0.8)O-3-(Ba0.7Ca0.3)TiO3 ceramics: Influence of concentration and microstructure
DOI:10.1016/j.jeurceramsoc.2013.11.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:7  AU: Zhang, Qiwei;Sun, Haiqin;Wang, Xusheng;Zhang, Yin;Li, Xia;
7:1:6:73     Dielectric Relaxation Time Behavior of B-site Hybrid-doped BaTiO3 Ceramics
DOI:10.1080/00150193.2013.849987  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Sareein, Thanapong;Unruan, Muanjai;Ngamjarurojana, Athipong;Ananta, Supon;Yimnirun, Rattikorn;
7:1:6:74     High- and low-field dielectric responses and ferroelectric properties of (Bi0.5Na0.5)Zr1-xTixO3 ceramics
DOI:10.1016/j.ceramint.2012.10.039  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Jaiban, Panupong;Jiansirisomboon, Sukanda;Watcharapasorn, Anucha;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar S.;
7:1:6:75     Effects of B-Site Doping on Piezoelectric and Ferroelectric Properties of Pb0.88Sr0.12(Zr0.54Ti0.44Sb0.02)((1-y))-(Zn1/3Nb2/3)(y)O-3 Ceramics
DOI:10.1080/00150193.2011.577367  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Parjansri, P.;Inthong, S.;Sutjarittangtham, K.;Rujijanagul, G.;Tunkasiri, T.;Intatha, U.;Pengpad, P.;Eitssayeam, S.;
7:1:6:76     The Dielectric Behavior of BaTiO3 Based Ceramics Doped With La/Mn
DOI:10.1080/00150193.2012.671107  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Ding Shihua;Zhao Ping;Song Tianxiu;Yang Xiaojing;
7:1:6:77     Proton defects in BaTiO3: New aspects regarding the re-oxidation of dielectric materials fired in reducing atmospheres
DOI:10.1016/j.jeurceramsoc.2013.05.027  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:0  AU: Su, C. Y.;Pithan, C.;Hennings, D. F.;Waser, R.;
7:1:6:78     Preparation, characterization and properties of novel 0-3 ferroelectric composites of Ba0.95Ca0.05Ti0.8Zr0.2O3-poly(vinylidene fluoride-trifluoroethylene)
DOI:10.1016/j.matchemphys.2011.12.005  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:0  AU: El Shafee, E.;Behery, S. M.;
7:1:7:1     Ferroelectric and piezoelectric properties of lead-free BaTiO3 doped Bi0.5Na0.5TiO3 thin films from metal-organic solution deposition
DOI:10.1016/j.jallcom.2012.06.071  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:27  AU: Acharya, Susant Kumar;Lee, Sang-Kwon;Hyung, Jung-Hwan;Yang, Yun-Ho;Kim, Bok-Hee;Ahn, Byung-Guk;
7:1:7:2     Enhanced ferroelectric and piezoelectric properties in doped lead-free (Bi0.5Na0.5)(0.94)Ba0.06TiO3 thin films
DOI:10.1063/1.3518484  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:37  AU: Wang, D. Y.;Chan, N. Y.;Li, S.;Choy, S. H.;Tian, H. Y.;Chan, H. L. W.;
7:1:7:3     Ferroelectric and piezoelectric properties of lead-free Bi0.5Na0.5 TiO3-Bi0.5K0.5TiO3-BaTiO3-thin films near the morphotropic phase boundary
DOI:10.1016/j.jallcom.2013.10.028  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Acharya, Susant Kumar;Kim, Tae-Min;Hyung, Jung-Hwan;Ahn, Byung-Guk;Lee, Sang-Kwon;
7:1:7:4     Dielectric and piezoelectric properties of lead-free (Bi,Na)TiO3-based thin films
DOI:10.1063/1.3309706  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:42  AU: Abazari, M.;Safari, A.;Bharadwaja, S. S. N.;Trolier-McKinstry, S.;
7:1:7:5     Ferro-piezoelectric properties of 0.94(Na0.5Bi0.5)TiO3-0.06BaTiO(3) thin film prepared by metal-organic decomposition
DOI:10.1016/j.jallcom.2010.05.069  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:32  AU: Zhang, D. Z.;Zheng, X. J.;Feng, X.;Zhang, T.;Sun, J.;Dai, S. H.;Gong, L. J.;Gong, Y. Q.;He, L.;Zhu, Z.;Huang, J.;Xu, X.;
7:1:7:6     Structural and piezoelectric characteristics of BNT-BT0.05 thin films processed by sol-gel technique
DOI:10.1016/j.jallcom.2011.11.129  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:21  AU: Cernea, Marin;Trupina, Lucian;Dragoi, Cristina;Vasile, Bogdan S.;Trusca, Roxana;
7:1:7:7     Reduced leakage current, enhanced ferroelectric and dielectric properties in (Ce,Fe)-codoped Na0.5Bi0.5TiO3 film
DOI:10.1063/1.3676663  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:17  AU: Yang, C. H.;Hu, G. D.;Wu, W. B.;Wu, H. T.;Yang, F.;Lu, Z. Y.;Wang, L.;
7:1:7:8     Reduced leakage current and enhanced ferroelectric properties in Mn-doped Bi0.5Na0.5TiO3-based thin films
DOI:10.1007/s10853-013-7144-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:11  AU: Hejazi, M. M.;Taghaddos, E.;Safari, A.;
7:1:7:9     Enhanced ferroelectric and piezoelectric response in Mn-doped Bi0.5Na0.5TiO3-BaTiO3 lead-free film by pulsed laser deposition
DOI:10.1016/j.apsusc.2013.06.114  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:13  AU: Jin, Chengchao;Wang, Feifei;Leung, Chung Ming;Yao, Qirong;Tang, Yanxue;Wang, Tao;Shi, Wangzhou;
7:1:7:10     Effects of annealing temperature on the microstructure, electrical properties of Fe-doped Na0.5Bi0.5TiO3 thin films
DOI:10.1016/j.jallcom.2013.10.117  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Sui, Huiting;Yang, Changhong;Zhao, Mingshi;Lin, Weiqiang;Feng, Chao;
7:1:7:11     Effect of Rb doping on ferroelectric and piezoelectric properties of Bi0.5Na0.5TiO3-BaTiO3 thin films
DOI:10.1016/j.jallcom.2014.03.087  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Acharya, Susant Kumar;Ahn, Byung-Guk;Jung, Chang Uk;Koh, Jung-Hyuk;Choi, In-Hwan;Lee, Sang-Kwon;
7:1:7:12     Macroscopic and nanoscale electrical properties of pulsed laser deposited (100) epitaxial lead-free Na0.5Bi0.5TiO3 thin films
DOI:10.1063/1.3290956  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:23  AU: Bousquet, M.;Duclere, J. -R.;Champeaux, C.;Boulle, A.;Marchet, P.;Catherinot, A.;Wu, A.;Vilarinho, P. M.;Deputier, S.;Guilloux-Viry, M.;Crunteanu, A.;Gautier, B.;Albertini, D.;Bachelet, C.;
7:1:7:13     Characterization of sol-gel synthesised lead-free (1-x)Na0.5Bi0.5TiO3-xBaTiO(3)-based ceramics
DOI:10.1016/j.jallcom.2011.06.085  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Chaouchi, A.;Kennour, S.;d'Astorg, S.;Rguiti, M.;Courtois, C.;Marinel, S.;Aliouat, M.;
7:1:7:14     Enhanced ferroelectric and dielectric properties in (La0.7Ca0.3)MnO3-buffered (Bi0.5Na0.5)TiO3-based lead-free thin film by pulsed laser deposition
DOI:10.1016/j.jallcom.2012.11.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Jin, C. C.;Wang, F. F.;Yao, Q. R.;Tang, Y. X.;Wang, T.;Shi, W. Z.;
7:1:7:15     Electrical behaviors of c-axis textured 0.975Bi(0.5)Na(0.5)TiO(3)-0.025BiCoO(3) thin films grown by pulsed laser deposition
DOI:10.1016/j.apsusc.2013.07.013  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:4  AU: Guo, Feifei;Yang, Bin;Zhang, Shantao;Liu, Danqing;Wu, Fengmin;Wang, Dali;Cao, Wenwu;
7:1:7:16     Crystallographic Orientation Dependence on Electrical Properties of (Bi, Na) TiO3-based Thin Films
DOI:10.1111/jace.12524  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Ding, Rui;Wang, Danyang;Chu, Dewei;Li, Sean;
7:1:7:17     Electrical properties of (110) epitaxial lead-free ferroelectric Na0.5Bi0.5TiO3 thin films grown by pulsed laser deposition: Macroscopic and nanoscale data
DOI:10.1063/1.4716177  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Bousquet, M.;Duclere, J. -R.;Gautier, B.;Boulle, A.;Wu, A.;Deputier, S.;Fasquelle, D.;Remondiere, F.;Albertini, D.;Champeaux, C.;Marchet, P.;Guilloux-Viry, M.;Vilarinho, P.;
7:1:7:18     Lead-free ferroelectric BaTiO3 doped-(Na0.5Bi0.5)TiO3 thin films processed by pulsed laser deposition technique
DOI:10.1016/j.apsusc.2011.06.075  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:16  AU: Dragoi, Cristina;Cernea, Marin;Trupina, Lucian;
7:1:7:19     Piezoelectric BNT-BT0.11 thin films processed by sol-gel technique
DOI:10.1007/s10853-011-5512-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:13  AU: Cernea, Marin;Galca, Aurelian Catalin;Cioangher, Marius Cristian;Dragoi, Cristina;Ioncea, Gelu;
7:1:7:20     Dielectric tunability of highly (l00)-oriented Fe-doped Na0.5Bi0.5TiO3 thin film
DOI:10.1016/j.ceramint.2014.04.161  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Sui, H. T.;Yang, C. H.;Wang, G.;Feng, C.;
7:1:7:21     Synthesis of (Bi0.5Na0.5)TiO3 (BNT) and Pr doped BNT using the soft combustion technique and its properties
DOI:10.1016/j.jallcom.2010.11.163  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:22  AU: Razak, Khairunisak Abdul;Yip, Chiah Jun;Sreekantan, Srimala;
7:1:7:22     Temperature-dependent leakage current behavior of epitaxial Bi0.5Na0.5TiO3-based thin films made by pulsed laser deposition
DOI:10.1063/1.3660428  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Hejazi, M. M.;Safari, A.;
7:1:7:23     Dielectric and impedance spectroscopy characterizations of CuO added (Na0.5Bi0.5)(0.94)Ba0.06TiO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2013.12.167  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Zidi, N.;Chaouchi, A.;d'Astorg, S.;Rguiti, M.;Courtois, C.;
7:1:7:24     Growth and electric properties of (100)-oriented Mn-doped (Bi0.5Na0.5)TiO3-BaTiO3 thin film by pulsed laser deposition
DOI:10.1007/s00339-013-8014-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Jin, Chengchao;Wang, Feifei;Leung, Chung Ming;Tang, Yanxue;Wang, Tao;Yao, Qirong;Shi, Wangzhou;
7:1:7:25     Dielectric and ferroelectric properties of A-site non-stoichiometric Na0.5Bi0.5TiO3-based thin films
DOI:10.1016/j.matlet.2011.08.067  JN:MATERIALS LETTERS  PY:2012
  TC:11  AU: Yang, C. H.;Wu, W. B.;Yang, F.;Wu, H. T.;Zhang, X. Y.;
7:1:7:26     Effect of Mn Doping on Microstructure and Electrical Properties of the (Na0.85K0.15)(0.5)Bi0.5TiO3 Thin Films Prepared by Sol-Gel Method
DOI:10.1111/j.1551-2916.2011.04576.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:19  AU: Wu, Yunyi;Wang, Xiaohui;Zhong, Caifu;Li, Longtu;
7:1:7:27     Sol-Gel Synthesis and Characterization of Na0.5Bi0.5TiO3NaTaO3 Thin Films
DOI:10.1111/jace.12163  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Kunej, Spela;Veber, Asja;Suvorov, Danilo;
7:1:7:28     Structural and electrical properties of Bi0.5Na0.5 TiO3 based superlattices grown by pulsed laser deposition
DOI:10.1063/1.4901931  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Bousquet, M.;Batista, L.;Dellis, J. L.;Boulle, A.;Rabe, U.;Durand-Drouhin, O.;Gagou, Y.;Dupont, L.;Viallet, V.;Zeinert, A.;Hirsekorn, S.;Lemee, N.;
7:1:7:29     Preparation of perovskite Fe-doped Na0.5Bi0.5TiO3 thin film from polyethylene glycol-modified solution precursor on LaNiO3/Si substrate
DOI:10.1016/j.matlet.2013.03.126  JN:MATERIALS LETTERS  PY:2013
  TC:4  AU: Yang, Changhong;Sui, Huiting;Yang, Hongliang;Li, Xianxiang;
7:1:7:30     Evidence of morphotropic phase boundary displacement in lead-free (Bi0.5Na0.5)(1-x)BaxTiO3 polycrystalline thin films
DOI:10.1016/j.matlet.2011.05.111  JN:MATERIALS LETTERS  PY:2011
  TC:12  AU: Bretos, Inigo;Alonso-San Jose, David;Jimenez, Ricardo;Ricote, Jesus;Calzada, M. Lourdes;
7:1:7:31     Ferroelectric, ferromagnetic, and dielectric behaviors of (Na0.5Bi0.5)(0.98)Ce-0.02(Ti0.99Fe0.01)O-3-BiFe0.95Mn0.05O3 solid-solution thin film
DOI:10.1016/j.matlet.2012.07.108  JN:MATERIALS LETTERS  PY:2012
  TC:3  AU: Yang, Changhong;Sui, Huiting;Jiang, Hao;Xiong, Wei;Xu, Hongyan;
7:1:7:32     Preparation and characterization of sol-gel derived sodium-potassium bismuth titanate powders and thick films deposited by screen printing
DOI:10.1016/j.jallacom.2010.01.114  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Zhang, Haibo;Jiang, Shenglin;Kajiyoshi, Koji;
7:1:7:33     Structural, optical, and electric properties of BNT-BT0.08 thin films processed by sol-gel technique
DOI:10.1007/s10853-012-6646-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:5  AU: Cernea, Marin;Trupina, Lucian;Dragoi, Cristina;Galca, Aurelian-Catalin;Trinca, Liliana;
7:1:7:34     A diffuse phase transition study on Ba2+ substituted (Na0.5Bi0.5)TiO3 ferroelectric ceramic
DOI:10.1016/j.jallcom.2011.04.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:13  AU: Rao, K. Sambasiva;Tilak, B.;Rajulu, K. Ch. Varada;Swathi, A.;Workineh, Haileeyesus;
7:1:7:35     Nanotubes of piezoelectric BNT-BT0.08 obtained from sol-gel precursor
DOI:10.1007/s11051-013-1787-y  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:0  AU: Cernea, Marin;Trupina, Lucian;Vasile, Bogdan S.;Trusca, Roxana;Chirila, Cristina;
7:1:7:36     0.90(Na0.5Bi0.5TiO3)-0.06BaTiO(3)-0.04K(0.5)Na(0.5)NbO(3) Ferroelectric Thin Films Derived from Chemical Solutions
DOI:10.1111/j.1551-2916.2011.04478.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:17  AU: Kang, Guangqing;Yao, Kui;Wang, John;
7:1:7:37     Growth and electrical properties of Na1/2Bi1/2TiO3-BaTiO3 lead-free single crystal with morphotropic phase boundary composition
DOI:10.1063/1.3516259  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Chen, Chao;Jiang, Xiangping;Li, Yueming;Wang, Feifei;Zhang, Qinhui;Luo, Haosu;
7:1:7:38     Phase diagram and electric properties of the (Mn, K)-modified Bi0.5Na0.5TiO3-BaTiO3 lead-free ceramics
DOI:10.1007/s10853-011-5374-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:6  AU: Xu, Min;Wang, Feifei;Wang, Tao;Chen, Xinman;Tang, Yanxue;Shi, Wangzhou;
7:1:7:39     Domain evolution in lead-free thin film piezoelectric ceramics
DOI:10.1063/1.4746088  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Rogers, Meredith E.;Fancher, Chris M.;Blendell, John E.;
7:1:7:40     Non-lead Ce: Na0.5Bi0.5TiO3-BiFeO3 solid solution thin film with significantly reduced leakage current and large polarization
DOI:10.1016/j.ceramint.2013.09.019  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Yang, C. H.;Wu, H. T.;Yang, F.;Hu, G. D.;
7:1:7:41     Characteristics of yttrium substituted sodium bismuth titanate thin films
DOI:10.1016/j.matlet.2010.07.019  JN:MATERIALS LETTERS  PY:2010
  TC:13  AU: Kang, Dong Heon;Lee, Byung Soo;An, Hee Kwon;Kim, Young Ho;Paik, Dong Soo;Hwang, Hak In;Cho, Nam Kyu;
7:1:7:42     BNT-BT0.08 wires derived from sol-gel precursor and their piezoelectric behavior
DOI:10.1007/s11051-013-1668-4  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:1  AU: Cernea, M.;Pintilie, L.;Trupina, L.;Vasile, B. S.;Chirila, C.;Pasuk, I.;
7:1:7:43     Thermo-electrical energy conversions in Bi0.5Na0.5TiO3-BaTiO3 thin films prepared by sol-gel method
DOI:10.1016/j.tsf.2012.08.052  JN:THIN SOLID FILMS  PY:2012
  TC:8  AU: Zheng, Xiu-Cheng;Zheng, Guang-Ping;Lin, Zheng;Jiang, Zhi-Yuan;
7:1:7:44     Structure and electrical properties of Mn doped Bi(Mg1/2Ti1/2)O-3-PbTiO3 ferroelectric thin films
DOI:10.1016/j.apsusc.2012.12.087  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:6  AU: Liu, Longdong;Zuo, Ruzhong;Sun, Qian;Liang, Qi;
7:1:7:45     BiFeO3 doped-BNT-BT0.08 piezoelectric and magnetic nanowires, derived from sol-gel precursor
DOI:10.1007/s11051-013-2231-z  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2014
  TC:1  AU: Cernea, M.;Trupina, L.;Vasile, B. S.;Bartha, C.;Radu, R.;Chirila, C.;Teodorescu, Andrei;
7:1:7:46     Preparation and ferroelectric properties of (Na0.5Bi0.5)(0.94)Ba0.06TiO3 thin films deposited on Pt electrodes using LaNiO3 as buffer layer
DOI:10.1016/j.ceramint.2011.04.055  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:10  AU: Fang, Xiao-lei;Shen, Bo;Zhai, Ji-wei;Yao, Xi;
7:1:7:47     Effect of Na/K excess on the electrical properties of Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3 thin films prepared by sol-gel processing
DOI:10.1016/j.tsf.2011.01.077  JN:THIN SOLID FILMS  PY:2011
  TC:7  AU: Wu, Yunyi;Wang, Xiaohui;Zhong, Caifu;Li, Longtu;
7:1:7:48     Electrical characterization of sol-gel-derived (1-x)NBT-xNTa (0.05 < x < 0.3) thin films
DOI:10.1016/j.ceramint.2012.12.095  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Kunej, Spela;Veber, Asja;Suvorov, Danilo;
7:1:7:49     Influence of annealing on the structure and ferroelectric properties of Sr0.13Na0.37Bi0.50TiO3 thin films prepared by metalorganic solution deposition
DOI:10.1016/j.jallcom.2010.05.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:4  AU: Xu, Huizhong;Wang, Yaping;Zhen, Liang;Wang, Zhuo;
7:1:7:50     Lead-free ferroelectric thin films obtained by pulsed laser deposition
DOI:10.1007/s00339-010-5933-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:4  AU: Scarisoreanu, N. D.;Craciun, F.;Chis, A.;Birjega, R.;Moldovan, A.;Galassi, C.;Dinescu, M.;
7:1:7:51     Synthesis and Electrical Properties of Sputtered (Na0.5Bi0.5)TiO3 Thin Films on Silicon Substrate
DOI:10.1111/j.1551-2916.2012.05285.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Quignon, Sebastien;Soyer, Caroline;Remiens, Denis;
7:1:7:52     Preparation and characterization of Ca0.18Na0.32Bi0.50TiO3 ferroelectric thin films by metalorganic solution deposition
DOI:10.1016/j.jallcom.2009.09.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Xu, Huizhong;Zhen, Liang;Wang, Yaping;Wang, Zhuo;
7:1:7:53     Hardening behavior of Mn-modified KNN-BT thick films fabricated by aerosol deposition
DOI:10.1016/j.matlet.2010.09.077  JN:MATERIALS LETTERS  PY:2011
  TC:2  AU: Han, Guifang;Priya, Shashank;Ryu, Jungho;Yoon, Woon-Ha;Choi, Jong-Jin;Hahn, Byung-Dong;Park, Dong-Soo;
7:1:7:54     Effect of BaTiO3 additive on the electrical properties of Na0.50Bi0.50TiO3 lead free ceramics
DOI:10.1016/j.matchemphys.2013.04.038  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:2  AU: Sharma, Dhananjay K.;Kumar, Nawnit;Sharma, Seema;Rai, Radheshyam;
7:1:7:55     Preparation and Properties of Bi0.5Na0.5TiO3 Thin Films by Chemical Solution Deposition
DOI:10.1080/00150193.2010.483201  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Maiwa, Hiroshi;Kogure, Tomonori;Sakamoto, Wataru;Hayashi, Takashi;
7:1:7:56     Growth and properties of highly oriented lead-free Mn-doped NaNbO3-BaTiO3 piezoelectric thin films prepared by chemical solution deposition
DOI:10.1016/j.jcrysgro.2010.11.054  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:2  AU: Sakamoto, Wataru;Hamazaki, Yu-ichi;Maiwa, Hiroshi;Morioka, Hitoshi;Saito, Keisuke;Moriya, Makoto;Yogo, Toshinobu;
7:1:7:57     Lead-free piezoelectric thin films of Mn-doped NaNbO3-BaTiO3 fabricated by chemical solution deposition
DOI:10.1016/j.tsf.2009.12.102  JN:THIN SOLID FILMS  PY:2010
  TC:9  AU: Sakamoto, Wataru;Hamazaki, Yu-ichi;Maiwa, Hiroshi;Moriya, Makoto;Yogo, Toshinobu;
7:1:7:58     Growth and Characterization of Na0.5Bi0.5TiO3 Thin Films with BaTiO3 Buffer Layer (Study of Au/Na0.5Bi0.5TiO3/BaTiO3/Pt Capacitor)
DOI:10.1080/00150193.2013.821859  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Daryapurkar, A. S.;Kolte, J. T.;Gopalan, P.;
7:1:7:59     Effects of Nb-doping on the micro-structure and dielectric properties of (Bi0.5Na0.5)TiO3 ceramics
DOI:10.1016/j.ceramint.2012.10.045  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Petnoi, Napatporn;Bomlai, Pornsuda;Jiansirisomboon, Sukanda;Watcharapasorn, Anucha;
7:1:7:60     Improved ferroelectricity of (1-x)Na0.5Bi0.5TiO3-xBaTiO3 ceramics rapidly sintered at low temperature
DOI:10.1016/j.ceramint.2014.04.014  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Xu, Xijun;Jiang, Jinguo;Ahmad, Hussain;Yuan, Guoliang;Yin, Jiang;Liu, Zhiguo;
7:1:7:61     Phase Formation and Dielectric Properties of Ge Doped (Bi0.5Na0.5)TiO3 Ceramics
DOI:10.1080/00150193.2013.849981  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Khamman, Orawan;
7:1:7:62     Impedance spectroscopy studies of 0.7Bi(Fe1-xGax)O-3-0.3PbTiO(3) high temperature piezoelectric ceramics
DOI:10.1016/j.jallcom.2013.04.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Chen, Jianguo;Jin, Dengren;Cheng, Jinrong;
7:1:7:63     Modeling the electrode geometry of co-planar capacitors for the microwave dielectric characterization of ceramic thin films
DOI:10.1063/1.4846761  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Veber, A.;Fabijan, D.;Kunej, S.;
7:1:8:1     Metal-ion doped luminescent thin films for optoelectronic applications
DOI:10.1039/c3tc31024h  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:32  AU: Zhang, Yang;Hao, Jianhua;
7:1:8:2     Bright Upconversion Emission, Increased Tc, Enhanced Ferroelectric and Piezoelectric Properties in Er-Doped CaBi4Ti4O15 Multifunctional Ferroelectric Oxides
DOI:10.1111/jace.12002  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:20  AU: Peng, Dengfeng;Wang, Xusheng;Xu, Chaonan;Yao, Xi;Lin, Jian;Sun, Tiantuo;
7:1:8:3     Upconversion luminescence, ferroelectrics and piezoelectrics of Er Doped SrBi4Ti4O15
DOI:10.1063/1.4773318  JN:AIP ADVANCES  PY:2012
  TC:7  AU: Peng, Dengfeng;Zou, Hua;Xu, Chaonan;Wang, Xusheng;Yao, Xi;Lin, Jian;Sun, Tiantuo;
7:1:8:4     Er doped BaBi4Ti4O15 multifunctional ferroelectrics: Up-conversion photoluminescence, dielectric and ferroelectric properties
DOI:10.1016/j.jallcom.2012.10.194  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:17  AU: Peng, Dengfeng;Zou, Hua;Xu, Chaonan;Wang, Xusheng;Yao, Xi;
7:1:8:5     Blue excited photoluminescence of Pr doped CaBi2Ta2O9 based ferroelectrics
DOI:10.1016/j.jallcom.2011.09.019  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:19  AU: Peng, Dengfeng;Sun, Haiqin;Wang, Xusheng;Zhang, Juncheng;Tang, Mianmian;Yao, Xi;
7:1:8:6     Upconversion emission in Er-doped and Er/Yb-codoped ferroelectric Na0.5Bi0.5TiO3 and its temperature sensing application
DOI:10.1063/1.4886575  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:9  AU: Du, Peng;Luo, Laihui;Li, Weiping;Yue, Qingying;
7:1:8:7     Significantly Enhanced Red Photoluminescence Properties of Nanocomposite Films Composed of a Ferroelectric Bi3.6Eu0.4Ti3O12 Matrix and Highly c-Axis-Oriented ZnO Nanorods on Si Substrates Prepared by a Hybrid Chemical Solution Method
DOI:10.1021/ja910388f  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:27  AU: Zhou, Hong;Chen, Xinman;Wu, Guangheng;Gao, Feng;Qin, Ni;Bao, Dinghua;
7:1:8:8     Bright up-conversion green photoluminescence in Ho3+-Yb3+ co-doped Bi4Ti3O12 ferroelectric thin films
DOI:10.1063/1.3596597  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:21  AU: Ding, Gangjin;Gao, Feng;Wu, Guangheng;Bao, Dinghua;
7:1:8:9     Photoluminescence and piezoelectric properties of Pr-doped NBT-xBZT ceramics: Sensitive to structure transition
DOI:10.1016/j.jallcom.2013.01.096  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:12  AU: Du, Peng;Luo, Laihui;Li, Weiping;Zhang, Yueping;Chen, Hongbing;
7:1:8:10     Remanent-polarization-induced enhancement of photoluminescence in Pr3+-doped lead-free ferroelectric (Bi0.5Na0.5)TiO3 ceramic
DOI:10.1063/1.4790290  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:14  AU: Tian, Xiangling;Wu, Zheng;Jia, Yanmin;Chen, Jianrong;Zheng, R. K.;Zhang, Yihe;Luo, Haosu;
7:1:8:11     Strong red emission in Pr doped (Bi0.5Na0.5)TiO3 ferroelectric ceramics
DOI:10.1063/1.3606425  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:28  AU: Sun, Haiqin;Peng, Dengfeng;Wang, Xusheng;Tang, Mianmian;Zhang, Qiwei;Yao, Xi;
7:1:8:12     Color-tunable upconversion emission and optical temperature sensing behaviour in Er-Yb-Mo codoped Bi7Ti4NbO21 multifunctional ferroelectric oxide
DOI:10.1364/OME.4.001545  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:4  AU: Zou, Hua;Li, Jun;Wang, Xusheng;Peng, Dengfeng;Li, Yanxia;Yao, Xi;
7:1:8:13     Improved Electrical Properties and Strong Red Emission of Pr3+-Doped x K0.5Bi0.5TiO3-(1-x)Na0.5Bi0.5TiO3 Lead-Free Ferroelectric Thin Films
DOI:10.1111/j.1551-2916.2011.05028.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:17  AU: Zhou, Hong;Wu, Guangheng;Qin, Ni;Bao, Dinghua;
7:1:8:14     A new multifunctional Aurivillius oxide Na0.5Er0.5Bi4Ti4O15: Up-conversion luminescent, dielectric, and piezoelectric properties
DOI:10.1016/j.ceramint.2014.04.102  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Hui, Xinwei;Peng, Dengfeng;Zou, Hua;Li, Jun;Cao, Qiufeng;Li, Yanxia;Wang, Xusheng;Yao, Xi;
7:1:8:15     A photoferroelectric material is more than the sum of its parts
DOI:10.1038/nmat3282  JN:NATURE MATERIALS  PY:2012
  TC:38  AU: Kreisel, J.;Alexe, M.;Thomas, P. A.;
7:1:8:16     Photoluminescence and Temperature Dependent Electrical Properties of Er-Doped 0.94Bi(0.5)Na(0.5)TiO(3)-0.06BaTiO(3) Ceramics
DOI:10.1111/jace.13217  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Hu, Bin;Pan, Zhao;Dai, Ming;Guo, Fei-Fei;Ning, Huanpo;Gu, Zheng-Bin;Chen, Jun;Lu, Ming-Hui;Zhang, Shan-Tao;Yang, Bin;Cao, Wenwu;
7:1:8:17     Photoluminescence and electrical performance of smart material: Pr-doped (1-x)(Na0.5Bi0.5)TiO3-xCaTiO(3) ceramics
DOI:10.1016/j.jallcom.2012.10.003  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:13  AU: Du, Peng;Luo, Laihui;Li, Weiping;Zhang, Yuepin;Chen, Hongbing;
7:1:8:18     Photoluminescence properties in Sm doped Bi1/2Na1/2TiO3 ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.05.094  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Wei, T.;Sun, F. C.;Zhao, C. Z.;Li, C. P.;Yang, M.;Wang, Y. Q.;
7:1:8:19     Optical temperature sensor based on upconversion emission in Er-doped ferroelectric 0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3 ceramic
DOI:10.1063/1.4871378  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:7  AU: Du, Peng;Luo, Laihui;Li, Weiping;Yue, Qingying;Chen, Hongbing;
7:1:8:20     Chemical substitution-induced exceptional emitting-wavelength tuning in transition metal Ni2+-doped ferroelectric oxides with ultrabroadband near-infrared luminescence
DOI:10.1039/c4tc00313f  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:5  AU: Bai, Gongxun;Zhang, Yang;Hao, Jianhua;
7:1:8:21     Sol-gel hydrothermal synthesis and enhanced biosensing properties of nanoplated lanthanum-substituted bismuth titanate microspheres
DOI:10.1039/c0jm03010d  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:20  AU: Hu, Jianqiang;Yu, Ying;Guo, Huan;Chen, Zhiwu;Li, Aiqing;Feng, Xiumei;Xi, Baomin;Hu, Guanqi;
7:1:8:22     Optical temperature sensing by upconversion luminescence of Er doped Bi5TiNbWO15 ferroelectric materials
DOI:10.1063/1.4905454  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Zou, Hua;Wang, Xusheng;Hu, Yifeng;Zhu, Xiaoqin;Sui, Yongxing;Song, Zhitang;
7:1:8:23     Luminescent, dielectric, and ferroelectric properties of Pr doped Bi7Ti4NbO21 multifunctional ceramics
DOI:10.1063/1.4842775  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Zou, Hua;Hui, Xinwei;Wang, Xusheng;Peng, Dengfeng;Li, Jun;Li, Yanxia;Yao, Xi;
7:1:8:24     Dual-enhancement of ferro-/piezoelectric and photoluminescent performance in Pr3+ doped (K0.5Na0.5)NbO3 lead-free ceramics
DOI:10.1063/1.4891959  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Wei, Yongbin;Wu, Zheng;Jia, Yanmin;Wu, Jiang;Shen, Yichao;Luo, Haosu;
7:1:8:25     Color-tunable upconversion luminescence of Yb3+, Er3+, and Tm3+ tri-doped ferroelectric BaTiO3 materials
DOI:10.1063/1.4805050  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:17  AU: Zhang, Yang;Hao, Jianhua;
7:1:8:26     Strong Upconversion Photoluminescence and Large Ferroelectric Polarization in Er3+-Yb3+-W6+ Triply Substituted Bismuth Titanate Thin Films Prepared by Chemical Solution Deposition
DOI:10.1111/j.1551-2916.2011.04568.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Gao, Feng;Zhang, Qinyuan;Ding, Gangjin;Qin, Ni;Bao, Dinghua;
7:1:8:27     Strong red emission in lead-free ferroelectric Pr3+-doped Na0.5Bi0.5TiO3 thin films without the need of charge compensation
DOI:10.1063/1.3611427  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Zhou, Hong;Liu, Xiang;Qin, Ni;Bao, Dinghua;
7:1:8:28     Red emission in Pr doped CaBi4Ti4O15 ferroelectric ceramics
DOI:10.1016/j.mseb.2011.09.009  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:13  AU: Peng, Dengfeng;Sun, Haiqin;Wang, Xusheng;Zhang, Juncheng;Tang, Mianmian;Yao, Xi;
7:1:8:29     Piezoelectric/photoluminescence effects in rare-earth doped lead-free ceramics
DOI:10.1007/s00339-012-7524-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:1  AU: Yao, Qirong;Wang, Feifei;Jin, Chengchao;Tang, Yanxue;Wang, Tao;Shi, Wangzhou;
7:1:8:30     Dual Enhancement of Photoluminescence and Ferroelectric Polarization in Pr3+/La3+-Codoped Bismuth Titanate Thin Films
DOI:10.1111/j.1551-2916.2010.03660.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:17  AU: Zhou, Hong;Wu, Guangheng;Qin, Ni;Baow, Dinghua;
7:1:8:31     Bright up-conversion photoluminescence of Bi4-xErxTi3O12 ferroelectric thin films
DOI:10.1063/1.3549836  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Gao, Feng;Ding, Gangjin;Zhou, Hong;Wu, Guangheng;Qin, Ni;Bao, Dinghua;
7:1:8:32     Effects of Er doping site and concentration on piezoelectric, ferroelectric, and optical properties of ferroelectric Na0.5Bi0.5TiO3
DOI:10.1063/1.4823812  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:14  AU: Luo, Laihui;Du, Peng;Li, Weiping;Tao, Weidong;Chen, Hongbing;
7:1:8:33     Polarization-induced enhancement of photoluminescence in Pr3+ doped ferroelectric diphase BaTiO3-CaTiO3 ceramics
DOI:10.1063/1.4818793  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:11  AU: Zou, Hua;Peng, Dengfeng;Wu, Guangheng;Wang, Xusheng;Bao, Dinghua;Li, Jun;Li, Yanxia;Yao, Xi;
7:1:8:34     A highly thermal stable and waterproof red phosphor: Pr3+-doped Sr2Al2SiO7
DOI:10.1007/s10853-013-7609-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:3  AU: Zou, Hua;Peng, Dengfeng;Chu, Zhenming;Wang, Xusheng;Li, Yanxia;Yao, Xi;
7:1:8:35     Photoluminescent and Dielectric Characterizations of Pr Doped CaBi2Nb2O9 Multifunctional Ferroelectrics
DOI:10.1080/00150193.2013.838840  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Peng, Dengfeng;Zou, Hua;Xu, Chao-Nan;Li, Jun;Wang, Xusheng;Yao, Xi;
7:1:8:36     Enhancement of piezoelectric properties of (LiCePr)-multidoped CaBi2Nb2O9 high temperature ceramics
DOI:10.1016/j.matlet.2013.05.108  JN:MATERIALS LETTERS  PY:2013
  TC:6  AU: Peng, Zhihang;Chen, Qiang;Wang, Yadan;Xin, Deqiong;Xian, Dinquan;Zhu, Jianguo;
7:1:8:37     Enhancement of luminescence and afterglow in CaTiO3:Pr3+ by Zr substitution for Ti
DOI:10.1016/j.jallcom.2010.03.138  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:19  AU: Zhang, Jun-Cheng;Wang, Xusheng;Yao, Xi;
7:1:8:38     Green and red emission for (K0.5Na0.5)NbO3:Pr ceramics
DOI:10.1063/1.3686193  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:14  AU: Sun, Haiqin;Peng, Dengfeng;Wang, Xusheng;Tang, Mianmian;Zhang, Qiwei;Yao, Xi;
7:1:8:39     Properties of praseodymium-doped bismuth potassium titanate (Bi0.5K0.5TiO3) synthesised using the soft combustion technique
DOI:10.1016/j.jallcom.2010.09.136  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Ng, Chai Yan;Razak, Khairunisak Abdul;
7:1:8:40     Bright upconversion luminescence and increased Tc in CaBi2Ta2O9:Er high temperature piezoelectric ceramics
DOI:10.1063/1.4720578  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Peng, Dengfeng;Wang, Xusheng;Xu, Chaonan;Yao, Xi;Lin, Jian;Sun, Tiantuo;
7:1:8:41     Effect of Nd substitution on the microstructure and electrical properties of Bi7Ti4NbO21 piezoceramics
DOI:10.1016/j.jeurceramsoc.2012.04.048  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:10  AU: Shao, Changwei;Lu, Yiqing;Wang, Dong;Li, Yongxiang;
7:1:8:42     Strong green and red up-conversion emission in Ho3+, Yb3+ and Li+ co- or tri-doped SrAl2O4 ceramics
DOI:10.1016/j.jallcom.2012.03.071  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Tang, Mianmian;Wang, Xusheng;Peng, Dengfeng;Wang, Wei;Sun, Haiqin;Yao, Xi;
7:1:8:43     Correlating phase and microstructure development versus dielectric properties in La3+ and Er3+ co-doped Bi4Ti3O12 ferroelectric ceramics
DOI:10.1016/j.jallcom.2011.08.062  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:0  AU: dos Santos, Valdeci Bosco;M'Peko, Jean-Claude;Mastelaro, Valmor Roberto;
7:1:8:44     Light-induced structural changes in Eu-doped (Pb, La) (Zr, Ti)O-3 ceramics
DOI:10.1063/1.3584136  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:16  AU: Myint, Thandar;Gunawidjaja, Ray;Eilers, Hergen;
7:1:8:45     Influence of Au nanoparticles on the photoluminescent and electrical properties of Bi3.6Eu0.4Ti3O12 ferroelectric thin films
DOI:10.1063/1.4887810  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Su, Li;Qin, Ni;Xie, Wei;Fu, Jianhui;Bao, Dinghua;
7:1:8:46     Enhanced photoluminescence and electrical properties of 0-3 type ZnO/Bi3.6Eu0.4Ti3O12 nanocomposite thin films
DOI:10.1016/j.materresbull.2012.12.062  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:0  AU: Zhou, Xiaoye;Qin, Ni;Wu, Guangheng;Bao, Dinghua;
7:1:8:47     Control of the structure, morphology and dielectric properties of bismuth titanate ceramics by praseodymium substitution using an intermediate fuel agent-assisted self-combustion synthesis
DOI:10.1007/s10853-012-6255-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Krengvirat, Warapong;Sreekantan, Srimala;Ahmad-Fauzi, M. N.;Chinwanitcharoen, Charoen;Kawamura, Go;Matsuda, Atsunori;
7:1:8:48     Dielectric properties and bright red emission of Y3+/Eu3+-codoped ZrO2 thin films prepared by chemical solution deposition
DOI:10.1016/j.ceramint.2012.07.069  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Liang, Lirong;Zhou, Hong;Wu, Guangheng;Mo, Zhong;Bao, Dinghua;
7:1:8:49     Green and red upconversion luminescence of Er3+-doped K0.5Na0.5NbO3 ceramics
DOI:10.1016/j.ceramint.2013.10.089  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:12  AU: Sun, Haiqin;Zhang, Qiwei;Wang, Xusheng;Gu, Mu;
7:1:8:50     Structural evolution of the intergrowth bismuth-layered Bi7Ti4NbO21
DOI:10.1007/s10853-011-5483-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:9  AU: Gao, X.;Gu, H.;Li, Y. -X.;Yi, Z. -G.;Ceh, M.;Zagar, K.;
7:1:8:51     Strong red emission and electrical properties of highly c-axis oriented Eu3+-doped bismuth vanadate ferroelectric thin films
DOI:10.1016/j.matchemphys.2014.08.061  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:1  AU: Xie, Wei;Su, Li;Sa, Tongliang;Fu, Jianhui;Hu, Wei;Qin, Ni;Bao, Dinghua;
7:1:8:52     Correlation Between Grain Sizes and Electrical Properties of CaBi2Nb2O9 Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2012.05327.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Chen, Huanbei;Shen, Bo;Xu, Jinbao;Kong, Lingbing;Zhai, Jiwei;
7:1:8:53     Phase structure of Li-0.058(Na0.51K0.49)(0.942)NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.matlet.2012.06.030  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Zhao, Yongjie;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;
7:1:8:54     Preparation and luminescent properties of green SrAl2O4: Eu2+ and blue SrAl2O4: Eu2+, Gd3+ phosphors
DOI:10.1016/j.matlet.2013.07.134  JN:MATERIALS LETTERS  PY:2013
  TC:2  AU: Feng, Wen-Lin;
7:1:8:55     Optical amplification in disordered electrooptic Tm3+ and Ho3+ codoped lanthanum-modified lead zirconate titanate ceramics and study of spectroscopy and communication between cations
DOI:10.1063/1.4866000  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhao, Hua;Zhang, Kun;Xu, Long;Sun, Fankui;Chen, Xuesheng;Li, Kewen K.;Zhang, Jingwen;
7:1:8:56     Sputtering configurations and the luminescence of rare earth-doped silicon rich oxide thin films
DOI:10.1016/j.optmat.2009.12.002  JN:OPTICAL MATERIALS  PY:2010
  TC:3  AU: Rozo, Carlos;Fonseca, Luis F.;
7:1:8:57     Microstructure, Dielectric, and Piezoelectric Properties of Ce-Modified CaBi2Nb2O9 Ceramics
DOI:10.1080/00150193.2010.482471  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Tian, Xiaoxia;Qu, Shaobo;Pei, Zhibin;Tian, Changhui;Xu, Zhuo;
7:1:8:58     A novel method for the preparation of Bi2Ti2O7 pyrochlore
DOI:10.1016/j.matlet.2012.02.073  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Ren, Jiankun;Liu, Guoqing;Wang, Yuping;Shi, Qian;
7:1:9:1     Large strain and high energy storage density in orthorhombic perovskite, (Pb0.97La0.02)(Zr1-x-ySnxTiy)O-3 antiferroelectric thin films
DOI:10.1063/1.3497193  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:38  AU: Mirshekarloo, Meysam Sharifzadeh;Yao, Kui;Sritharan, Thirumany;
7:1:9:2     Effect of Nb doping on preferential orientation, phase transformation behavior and electrical properties of PbZrO3 thin films
DOI:10.1016/j.jallcom.2012.06.116  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Ye, Mao;Sun, Qiu;Chen, Xiangqun;Jiang, Zhaohua;Wang, Fuping;
7:1:9:3     A comprehensive review on the progress of lead zirconate-based antiferroelectric materials
DOI:10.1016/j.pmatsci.2014.01.002  JN:PROGRESS IN MATERIALS SCIENCE  PY:2014
  TC:27  AU: Hao, Xihong;Zhai, Jiwei;Kong, Ling Bing;Xu, Zhengkui;
7:1:9:4     Energy-Storage Properties of 0.89Bi0.5Na0.5TiO3-0.06BaTiO3-0.05K0.5Na0.5NbO3 Lead-Free Anti-ferroelectric Ceramics
DOI:10.1111/j.1551-2916.2011.04731.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:35  AU: Gao, Feng;Dong, Xianlin;Mao, Chaoliang;Liu, Wei;Zhang, Hongling;Yang, Lihui;Cao, Fei;Wang, Genshui;
7:1:9:5     Effect of Eu Doping on the Electrical Properties and Energy Storage Performance of PbZrO3 Antiferroelectric Thin Films
DOI:10.1111/j.1551-2916.2011.04814.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:19  AU: Ye, Mao;Sun, Qiu;Chen, Xiangqun;Jiang, Zhaohua;Wang, Fuping;
7:1:9:6     Lead Lanthanum Zirconate Titanate Ceramic Thin Films for Energy Storage
DOI:10.1021/am302985u  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:22  AU: Tong, Sheng;Ma, Beihai;Narayanan, Manoj;Liu, Shanshan;Koritala, Rachel;Balachandran, Uthamalingam;Shi, Donglu;
7:1:9:7     Effect of electrode materials on the scaling behavior of energy density in Pb(Zr0.96Ti0.03)Nb0.01O3 antiferroelectric films
DOI:10.1063/1.4752726  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Ge, Jun;Pan, Gang;Remiens, Denis;Chen, Ying;Cao, Fei;Dong, Xianlin;Wang, Genshui;
7:1:9:8     Improvement of the recoverable energy storage density and efficiency by utilizing the linear dielectric response in ferroelectric capacitors
DOI:10.1063/1.4892454  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Peng, Bin;Xie, Zhenkun;Yue, Zhenxing;Li, Longtu;
7:1:9:9     Energy-Storage Properties and Electrocaloric Effect of Pb(1-3x/2)LaxZr0.85Ti0.15O3 Antiferroelectric Thick Films
DOI:10.1021/am502415z  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:9  AU: Zhao, Ye;Hao, Xihong;Zhang, Qi;
7:1:9:10     Effect of Zr:Sn ratio in the lead lanthanum zirconate stannate titanate anti-ferroelectric ceramics on energy storage properties
DOI:10.1016/j.ceramint.2012.12.071  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:18  AU: Jiang, Shenglin;Zhang, Ling;Zhang, Guangzu;Liu, Sisi;Yi, Jinqiao;Xiong, Xue;Yu, Yan;He, Jungang;Zeng, Yike;
7:1:9:11     Charge-Discharge Properties of an Antiferroelectric Ceramics Capacitor Under Different Electric Fields
DOI:10.1111/j.1551-2916.2010.04226.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:26  AU: Zhang, Hongling;Chen, Xuefeng;Cao, Fei;Wang, Genshui;Dong, Xianlin;Hu, Zhiying;Du, Tao;
7:1:9:12     Dielectric properties and energy-storage performance of (Na-0.Bi-5(0).(5)) TiO3 thick films
DOI:10.1016/j.jallcom.2014.02.137  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Zhao, Ye;Hao, Xihong;Li, Meiling;
7:1:9:13     Energy-storage performance and electrocaloric effect in (100)-oriented Pb0.97La0.02(Zr0.95Ti0.05)O-3 antiferroelectric thick films
DOI:10.1063/1.3641983  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:23  AU: Hao, Xihong;Yue, Zhenxing;Xu, Jinbao;An, Shengli;Nan, Ce-Wen;
7:1:9:14     High energy-storage performance in Pb0.91La0.09(Ti0.65Zr0.35)O-3 relaxor ferroelectric thin films
DOI:10.1063/1.4768461  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Hao, Xihong;Wang, Ying;Yang, Jichun;An, Shengli;Xu, Jinbao;
7:1:9:15     Significant enhancement of energy-storage performance of (Pb0.91La0.09)(Zr0.65Ti0.35)O-3 relaxor ferroelectric thin films by Mn doping
DOI:10.1063/1.4829029  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Liu, Yunying;Hao, Xihong;An, Shengli;
7:1:9:16     Enhanced energy-storage properties of 0.89Bi(0.5)Na(0.5)TiO(3)-0.06BaTiO(3)-0.05K(0.5)Na(0.5)NbO(3) lead-free anti-ferroelectric ceramics by two-step sintering method
DOI:10.1016/j.matlet.2013.09.103  JN:MATERIALS LETTERS  PY:2014
  TC:7  AU: Ding, Jianxiang;Liu, Yunfei;Lu, Yinong;Qian, Hao;Gao, Hong;Chen, Hu;Ma, Chengjian;
7:1:9:17     Enhancement of energy storage in epitaxial PbZrO3 antiferroelectric films using strain engineering
DOI:10.1063/1.48961561  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ge, Jun;Remiens, Denis;Dong, Xianlin;Chen, Ying;Costecalde, Jean;Gao, Feng;Cao, Fei;Wang, Genshui;
7:1:9:18     Effect of residual stress on energy storage property in PbZrO3 antiferroelectric thin films with different orientations
DOI:10.1063/1.4825336  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Ge, Jun;Remiens, Denis;Costecalde, Jean;Chen, Ying;Dong, Xianlin;Wang, Genshui;
7:1:9:19     Enhanced polarization switching and energy storage properties of Pb0.97La0.02(Zr0.95Ti0.05)O-3 antiferroelectric thin films with LaNiO3 oxide top electrodes
DOI:10.1063/1.4801517  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:10  AU: Ge, Jun;Dong, Xianlin;Chen, Ying;Cao, Fei;Wang, Genshui;
7:1:9:20     W-doping induced antiferroelectric to ferroelectric phase transition in PbZrO3 thin films prepared by chemical solution deposition
DOI:10.1063/1.4803941  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Sa, Tongliang;Qin, Ni;Yang, Guowei;Bao, Dinghua;
7:1:9:21     Enhancement of charge and energy storage in PbZrO3 thin films by local field engineering
DOI:10.1063/1.4891768  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Sa, Tongliang;Cao, Ziping;Wang, Yongjin;Zhu, Hongbo;
7:1:9:22     Electrical and Energy Storage Performance of Eu-Doped PbZrO3 Thin Films with Different Gradient Sequences
DOI:10.1111/j.1551-2916.2012.05130.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:11  AU: Ye, Mao;Sun, Qiu;Chen, Xiangqun;Jiang, Zhaohua;Wang, Fuping;
7:1:9:23     Enhanced energy-storage performances of Bi2O3-Li2O added (1-x) (Na0.5Bi0.5) TiO3-xBaTiO(3) thick films
DOI:10.1016/j.ceramint.2014.01.107  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Zhang, Le;Hao, Xihong;Zhang, Liwen;
7:1:9:24     Dielectric properties and energy-storage performances of (1 - x)(Na0.5Bi0.5)TiO3-xSrTiO3 thick films prepared by screen printing technique
DOI:10.1016/j.jallcom.2013.10.107  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Zhang, Le;Hao, Xihong;
7:1:9:25     c/a Ratio-Dependent Energy-Storage Density in (0.9-x)Bi0.5Na0.5TiO3-xBaTiO3-0.1K0.5Na0.5NbO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04912.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Gao, Feng;Dong, Xianlin;Mao, Chaoliang;Cao, Fei;Wang, Genshui;
7:1:9:26     Enhanced antiferroelectric stability and electric-field-induced strain properties in rare earth-modified Pb(Zr0.63Sn0.26Ti0.11) O-3 ceramics
DOI:10.1063/1.4809934  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Zhang, Qingfeng;Yang, Tongqing;Zhang, Yangyang;Wang, Jinfei;Yao, Xi;
7:1:9:27     Composition-dependent dielectric and energy-storage properties of (Pb,La)(Zr,Sn,Ti)O-3 antiferroelectric thick films
DOI:10.1063/1.4802794  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:11  AU: Hao, Xihong;Wang, Ying;Zhang, Le;Zhang, Liwen;An, Shengli;
7:1:9:28     Effects of PbO Content on the Dielectric Properties and Energy Storage Performance of (Pb0.97La0.02)(Zr0.97Ti0.03)O-3 Antiferroelectric Thin Films
DOI:10.1111/j.1551-2916.2011.04460.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Hao, Xihong;Zhou, Jing;An, Shengli;
7:1:9:29     Effects of PbO insert layer on the microstructure and energy storage performance of (042)-preferred PLZT antiferroelectric thick films
DOI:10.1557/jmr.2012.124  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:10  AU: Wang, Ying;Hao, Xihong;Xu, Jinbao;
7:1:9:30     Structure and electrical properties of PbZrO3 antiferroelectric thin films doped with barium and strontium
DOI:10.1016/j.jallcom.2010.07.200  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Hao, Xihong;Zhai, Jiwei;Zhou, Jing;Yue, Zhenxing;Yang, Jichun;Zhao, Wenguang;An, Shengli;
7:1:9:31     Ferroelastic Strain Induced Antiferroelectric-Ferroelectric Phase Transformation in Multilayer Thin Film Structures
DOI:10.1002/adfm.201200832  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:3  AU: Mirshekarloo, Meysam Sharifzadeh;Yao, Kui;Sritharan, Thirumany;
7:1:9:32     Y doping and grain size co-effects on the electrical energy storage performance of (Pb0.87Ba0.1La0.02) (Zr0.65Sn0.3Ti0.05)O-3 anti-ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.10.131  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:12  AU: Zhang, Ling;Jiang, Shenglin;Zeng, Yike;Fu, Ming;Han, Kuo;Li, Qi;Wang, Qing;Zhang, Guangzu;
7:1:9:33     Dynamic Hysteresis and Scaling Behavior of Energy Density in Pb0.99Nb0.02[(Zr0.60Sn0.40)(0.95)Ti-0.05]O-3 Antiferroelectric Bulk Ceramics
DOI:10.1111/j.1551-2916.2012.05070.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:13  AU: Chen, Xuefeng;Cao, Fei;Zhang, Hongling;Yu, Gang;Wang, Genshui;Dong, Xianlin;Gu, Yan;He, Hongliang;Liu, Yusheng;
7:1:9:34     Epitaxial strain stabilization of a ferroelectric phase in PbZrO3 thin films
DOI:10.1103/PhysRevB.84.054112  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Chaudhuri, Ayan Roy;Arredondo, Miryam;Haehnel, Angelika;Morelli, Alessio;Becker, Michael;Alexe, Marin;Vrejoiu, Ionela;
7:1:9:35     Temperature-dependent energy storage properties of antiferroelectric Pb0.96La0.04Zr0.98Ti0.02O3 thin films
DOI:10.1063/1.4887066  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Hu, Zhongqiang;Ma, Beihai;Koritala, R. E.;Balachandran, Uthamalingam;
7:1:9:36     Phase transition and electric field induced strain properties in Sm modified lead zirconate stannate titanate based antiferroelectric ceramics
DOI:10.1063/1.4812375  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Zhang, Qingfeng;Yang, Tongqing;Zhang, Yangyang;Yao, Xi;
7:1:9:37     High energy density capacitors based on 0.88BaTiO(3)-0.12Bi(Mg-0.5, Ti-0.5)O-3/PbZrO3 multilayered thin films
DOI:10.1016/j.ceramint.2013.10.110  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Chen, Ting;Wang, Jinbin;Zhong, Xiangli;Wang, Fang;Li, Bo;Zhou, Yichun;
7:1:9:38     Structure and improved electrical properties of Pr-doped PbZrO3 antiferroelectric thin films with (111) preferential orientation
DOI:10.1016/j.matchemphys.2013.01.050  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:5  AU: Sa, Tongliang;Qin, Ni;Yang, Guowei;Bao, Dinghua;
7:1:9:39     Dielectric and impedance spectroscopy of zirconium modified (Na0.5Bi0.5)TiO3 ceramics
DOI:10.1016/j.ceramint.2012.12.087  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:15  AU: Barick, B. K.;Choudhary, R. N. P.;Pradhan, D. K.;
7:1:9:40     Increasing recoverable energy storage in electroceramic capacitors using "dead-layer" engineering
DOI:10.1063/1.4772016  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: McMillen, M.;Douglas, A. M.;Correia, T. M.;Weaver, P. M.;Cain, M. G.;Gregg, J. M.;
7:1:9:41     Large enhancement of energy-storage properties of compositional graded (Pb1-xLax)(Zr0.65Ti0.35)O-3 relaxor ferroelectric thick films
DOI:10.1063/1.4821209  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Zhang, Liwen;Hao, Xihong;Yang, Jichun;An, Shengli;Song, Bo;
7:1:9:42     High-Energy-Storage Density Capacitors of Bi(Ni1/2Ti1/2)O-3-PbTiO3 Thin Films with Good Temperature Stability
DOI:10.1111/jace.12443  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Xie, Zhenkun;Peng, Bin;Meng, Siqin;Zhou, Yuanyuan;Yue, Zhenxing;
7:1:9:43     Effects of raw materials on microstructure and dielectric properties of PbZrO3 antiferroelectric thin films prepared via sol-gel process
DOI:10.1016/j.jallcom.2011.06.067  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Liu, Yunying;Hao, Xihong;Zhou, Jing;Xu, Jinbao;An, Shengli;
7:1:9:44     Improved energy storage properties of PbZrO3 thin films by inserting 0.88BaTiO3-0.12Bi(Mg-1/2,Ti-112)O-3 layer
DOI:10.1016/j.apsusc.2013.08.119  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:1  AU: Chen, T.;Wang, J. B.;Zhong, X. L.;Zeng, Y. K.;Wang, F.;Zhou, Y. C.;
7:1:9:45     Effect of Sn:Ti variations on electric filed induced AFE-FE phase transition in PLZST antiferroelectric ceramics
DOI:10.1016/j.ceramint.2011.04.037  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Zheng, Qiongna;Yang, Tongqing;Wei, Kun;Wang, Jinfei;Yao, Xi;
7:1:9:46     Fabrication and energy-storage performance of (Pb,La)(Zr,Ti)O-3 antiferroelectric thick films derived from polyvinylpyrrolidone-modified chemical solution
DOI:10.1063/1.4742128  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Wang, Ying;Hao, Xihong;Yang, Jichun;Xu, Jinbao;Zhao, Diyi;
7:1:9:47     Orientation-dependent phase switching process and strains of Pb0.97La0.02(Zr0.85Sn0.13Ti0.02)O-3 antiferroelectric thin films
DOI:10.1063/1.3407567  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Hao, Xihong;Zhai, Jiwei;Shang, Fei;Zhou, Jing;An, Shengli;
7:1:9:48     Controlling Dielectric and Relaxor-Ferroelectric Properties for Energy Storage by Tuning Pb0.92La0.08Zr0.52Ti0.48O3 Film Thickness
DOI:10.1021/am506247w  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Brown, Emery;Ma, Chunrui;Acharya, Jagaran;Ma, Beihai;Wu, Judy;Li, Jun;
7:1:9:49     A Lead-Free and High-Energy Density Ceramic for Energy Storage Applications
DOI:10.1111/jace.12508  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Correia, Tatiana M.;McMillen, Mark;Rokosz, Maciej K.;Weaver, Paul M.;Gregg, John M.;Viola, Giuseppe;Cain, Markys G.;
7:1:9:50     High capacitance density by CaCu3Ti4O12 thin films
DOI:10.1063/1.3488893  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Fiorenza, Patrick;Lo Nigro, Raffaella;Raineri, Vito;Malandrino, Graziella;Toro, Roberta G.;Catalano, Maria R.;
7:1:9:51     High energy storage density performance of Ba, Sr-modified lead lanthanum zirconate titanate stannate antiferroelectric ceramics
DOI:10.1016/j.materresbull.2013.05.083  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Wang, Jinfei;Yang, Tongqing;Chen, Shengchen;Li, Gang;
7:1:9:52     Temperature-induced phase transition switching current of Pb0.97La0.02(Zr0.75Sn0.15Ti0.10)O-3 antiferroelectric ceramics
DOI:10.1016/j.ceramint.2014.03.088  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Shi, Yunbo;Liu, Bing;Li, Peiqing;Chou, Xiujian;Ma, Zongmin;Xue, Chenyang;Liu, Jun;
7:1:9:53     Synchrotron Radiation Analyses of Domain Switching and Lattice Strain Behaviors for Ferroelectric (Bi0.5Na0.5)TiO3 Single Crystals under Electric Fields
DOI:10.1080/00150193.2012.741915  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Kitanaka, Y.;Noguchi, Y.;Miyayama, M.;Kagawa, Y.;Moriyoshi, C.;Kuroiwa, Yo.;
7:1:9:54     Effects of oxide buffer layers on the microstructure and electrical properties of PLZST 2/87/10/3 antiferroelectric thin films
DOI:10.1016/j.jcrysgro.2010.11.171  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:5  AU: Hao, Xihong;Zhai, Jiwei;Yue, Zhenxing;Zhou, Jing;Yang, Jichun;An, Shengli;
7:1:9:55     Preparation and Piezoelectric Properties of (h00)-Oriented BaTiO3 Ceramics by Tape Casting
DOI:10.1080/00150191003670366  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Ding, Xiya;Shen, Bo;Zhai, Jiwei;Xu, Zhengkui;Fu, Fang;Zhang, Jingji;Yao, Xi;
7:1:9:56     Development of High Energy Capacitors Using La-Doped PbZrO3 Anti-Ferroelectric Thin Films
DOI:10.1080/00150193.2014.894386  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Koo, C. Y.;Eum, Y. J.;Hwang, S. -O.;Jung, H. -S.;Yeum, J. -H.;Lee, J. -Y.;Lee, H. Y.;
7:1:9:57     Effect of composition on the pressure-driven ferroelectric to antiferroelectric phase transformation behavior of (Pb0.97La0.02)(Zr1-x-ySnxTiy)O-3 ceramics
DOI:10.1063/1.4893372  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Jo, Hwan R.;Lynch, Christopher S.;
7:1:9:58     High pyroelectric response of lead zirconate stannate titanate based antiferroelectric ceramics with low Curie temperature
DOI:10.1016/j.materresbull.2012.08.059  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:1  AU: Zhang, Qingfeng;Chen, Shengchen;Fan, Maoyan;Jiang, Shenglin;Yang, Tongqing;Wang, Jinfei;Li, Gang;Yao, Xi;
7:1:9:59     Preparation and energy-storage performance of PLZT antiferroelectric thick films via sol-gel method
DOI:10.1016/j.ceramint.2012.10.124  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Liu, Yunying;Wang, Ying;Hao, Xihong;Xu, Jinbao;
7:1:9:60     Dielectric properties of CaCu3Ti4O12/Pb(Zr0.52Ti0.48)O-3 composite ceramics
DOI:10.1016/j.jallcom.2011.11.052  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Rajabtabar-Darvishi, A.;Li, W. L.;Sheikhnejad-Bishe, O.;Wang, L. D.;Zhao, Y.;Zhang, S. Q.;Fei, W. D.;
7:1:9:61     Phase Transformation Properties of Highly (100)-Oriented PLZST 2/85/12/3 Antiferroelectric Thin Films Deposited on Nb-SrTiO3 Single-Crystal Substrates
DOI:10.1111/j.1551-2916.2011.04736.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Hao, Xihong;Zhai, Jiwei;Yue, Zhenxing;Xu, Jinbao;
7:1:9:62     Effects of lanthanum modification on electrical and dielectric properties of Pb(Zr-0.70,Ti-0.30)O-3 ceramics
DOI:10.1016/j.matlet.2011.02.087  JN:MATERIALS LETTERS  PY:2011
  TC:5  AU: Zhang, Na;Feng, Yujun;Xu, Zhuo;
7:1:9:63     Preparation of PLZST antiferroelectric ceramics by hydroxide coprecipitation method
DOI:10.1016/j.ceramint.2012.10.091  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Li, G.;Yang, T. -Q.;Wang, J. -F.;Chen, S. -C.;Yao, X.;
7:1:10:1     Lead-free high-temperature dielectrics with wide operational range
DOI:10.1063/1.3544481  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:49  AU: Dittmer, Robert;Jo, Wook;Damjanovic, Dragan;Roedel, Juergen;
7:1:10:2     Structure, Dielectric Properties and Temperature Stability of BaTiO3-Bi(Mg1/2Ti1/2)O-3 Perovskite Solid Solutions
DOI:10.1111/j.1551-2916.2011.04519.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:47  AU: Xiong, Bo;Hao, Hua;Zhang, Shujun;Liu, Hanxing;Cao, Minghe;
7:1:10:3     A High-Temperature-Capacitor Dielectric Based on K0.5Na0.5NbO3-Modified Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3
DOI:10.1111/j.1551-2916.2012.05321.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:25  AU: Dittmer, Robert;Anton, Eva-Maria;Jo, Wook;Simons, Hugh;Daniels, John E.;Hoffman, Mark;Pokorny, Jan;Reaney, Ian M.;Roedel, Juergen;
7:1:10:4     BaTiO3-Bi(Zn1/2Ti1/2)O-3-BiScO3 Ceramics for High-Temperature Capacitor Applications
DOI:10.1111/j.1551-2916.2012.05340.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:28  AU: Raengthon, Natthaphon;Sebastian, Tutu;Cumming, Denis;Reaney, Ian M.;Cann, David P.;
7:1:10:5     High-temperature dielectrics in CaZrO3-modified Bi1/2Na1/2TiO3-based lead-free ceramics
DOI:10.1016/j.jeurceramsoc.2012.06.011  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:19  AU: Acosta, Matias;Zang, Jiadong;Jo, Wook;Roedel, Juergen;
7:1:10:6     Electrical Properties of Ca-modified Na0.5Bi0.5TiO3-BaTiO3 ceramics
DOI:10.1016/j.ceramint.2014.06.107  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Jan, Saeed Ullah;Zeb, Aurang;Milne, Steven J.;
7:1:10:7     Stability of High-Temperature Dielectric Properties for (1-x)Ba0.8Ca0.2TiO3-xBi(Mg0.5Ti0.5)O3 Ceramics
DOI:10.1111/jace.12412  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:12  AU: Zeb, Aurang;Milne, Steven J.;
7:1:10:8     Low variation in relative permittivity over the temperature range 25-450 degrees C for ceramics in the system (1-x)[Ba0.8Ca0.2TiO3]-x[Bi(Zn0.5Ti0.5)O-3]
DOI:10.1016/j.jeurceramsoc.2013.12.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:10  AU: Zeb, Aurang;Milne, Steven J.;
7:1:10:9     Piezoelectric properties of high Curie temperature barium titanate-bismuth perovskite-type oxide system ceramics
DOI:10.1063/1.3481390  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:30  AU: Wada, Satoshi;Yamato, Keisuke;Pulpan, Petr;Kumada, Nobuhiro;Lee, Bong-Yeon;Iijima, Takashi;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;
7:1:10:10     Structural and Dielectric Properties of Bi (Mg1/2Ti1/2)O3-BaTiO3 Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2011.04695.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:28  AU: Zhang, Qiang;Li, Zhenrong;Li, Fei;Xu, Zhuo;
7:1:10:11     Temperature-stable dielectric properties from 20 degrees C to 430 degrees C in the system BaTiO3 Bi(Mg0.5Zr0.5)O-3
DOI:10.1016/j.jeurceramsoc.2014.04.047  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:9  AU: Zeb, Aurang;Milne, Steven J.;
7:1:10:12     Dielectric Properties of Ba0.8Ca0.2TiO3-Bi(Mg-0.5, Ti-0.5)O-3-NaNbO3 Ceramics
DOI:10.1111/jace.12633  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Zeb, Aurang;Milne, Steven J.;
7:1:10:13     Temperature-Stable Relative Permittivity from-70 degrees C to 500 degrees C in (Ba0.8Ca0.2) TiO3-Bi(Mg0.5Ti0.5)O-3-NaNbO3 Ceramics
DOI:10.1111/jace.12949  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Zeb, Aurang;Bai, Yang;Button, Tim;Milne, Steven J.;
7:1:10:14     Diffuse dielectric behaviour in Na0.5K0.5NbO3-LiTaO3-BiScO3 lead-free ceramics
DOI:10.1016/j.matchemphys.2011.04.032  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:19  AU: Zhu, Fangyuan;Skidmore, T. A.;Bell, A. J.;Comyn, T. P.;James, C. W.;Ward, M.;Milne, S. J.;
7:1:10:15     Critical slowing down mechanism and reentrant dipole glass phenomena in (1-x)BaTiO3-xBiScO(3) (0.1 <= x <= 0.4): The high energy density dielectrics
DOI:10.1103/PhysRevB.83.024106  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Bharadwaja, S. S. N.;Kim, J. R.;Ogihara, H.;Cross, L. E.;Trolier-McKinstry, S.;Randall, C. A.;
7:1:10:16     Dielectric and Piezoelectric Properties of (1-x)K0.5Bi0.5TiO3-xBa(Ti0.8Zr0.2)O-3 Ceramics
DOI:10.1111/jace.12425  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Zeb, Aurang;Milne, Steven J.;
7:1:10:17     Evolution of phase transformation behavior and dielectric temperature stability of BaTiO3-Bi(Zn0.5Zr0.5)O-3 ceramics system
DOI:10.1016/j.jallcom.2012.09.127  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:8  AU: Wang, Yiliang;Chen, Xiuli;Zhou, Huanfu;Fang, Liang;Liu, Laijun;Zhang, Hui;
7:1:10:18     Dielectric properties of BaTiO3-Bi(Zn1/2Ti1/2)O-3-NaNbO3 solid solutions
DOI:10.1007/s10853-012-7000-3  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:4  AU: Raengthon, Natthaphon;Brown-Shaklee, Harlan J.;Brennecka, Geoff L.;Cann, David P.;
7:1:10:19     Band-gap nonlinearity in perovskite structured solid solutions
DOI:10.1063/1.3291102  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:18  AU: Lee, Soonil;Levi, Roni D.;Qu, Weiguo;Lee, Sung Chan;Randall, Clive A.;
7:1:10:20     Relaxor behaviour of K0.5Bi0.5NbO3-BiScO3 ceramics
DOI:10.1063/1.4718422  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Kruea-In, Chatchai;Rujijanagul, Gobwute;Zhu, Fang Yuan;Milne, Steven J.;
7:1:10:21     Impedance Spectroscopy of (Bi1/2Na1/2)TiO3-BaTiO3 Based High-Temperature Dielectrics
DOI:10.1111/jace.13012  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Zang, Jiadong;Li, Ming;Sinclair, Derek C.;Froemling, Till;Jo, Wook;Roedel, Juergen;
7:1:10:22     Evidence for diffuse ferroelectric phase transition and cooperative tricritical freezing of random-site dipoles due to off-centered Bi3+ ions in the average cubic lattice of (Ba1-xBix)(Ti1-xFex)O-3
DOI:10.1103/PhysRevB.85.064116  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Singh, Anar;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;Pandey, Dhananjai;
7:1:10:23     Dielectric and Piezoelectric Properties in the System: (1-x)[(Na0.5K0.5NbO3)(0.93)-(LiTaO3)(0.07)]-x[BiScO3]
DOI:10.1111/j.1551-2916.2009.03470.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:21  AU: Skidmore, Thomas A.;Comyn, Timothy P.;Milne, Steven J.;
7:1:10:24     Effect of sintering temperature on phase structure, microstructure, and electrical properties of (K0.5Na0.5)NbO3-(Ba0.6Sr0.4)(0.7)Bi0.2TiO3 lead-free ceramics
DOI:10.1007/s10853-013-7870-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:0  AU: Cheng, Hualei;Zhou, Wancheng;Du, Hongliang;Luo, Fa;Zhu, Dongmei;Xu, Boxi;
7:1:10:25     Structural investigation of a novel perovskite-based lead-free ceramics: xBiScO(3)-(1-x)BaTiO3
DOI:10.1063/1.3309064  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Datta, K.;Thomas, P. A.;
7:1:10:26     Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3
DOI:10.1103/PhysRevB.86.064105  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;
7:1:10:27     Dielectric Relaxation in BaTiO3-Bi(Zn1/2Ti1/2)O3 Ceramics
DOI:10.1111/j.1551-2916.2011.05018.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Raengthon, Natthaphon;Cann, David P.;
7:1:10:28     Enhanced dielectric relaxor properties in (1-x)(K0.5Na0.5)NbO3-x (Ba0.6Sr0.4)(0.7)Bi0.2TiO3 lead-free ceramic
DOI:10.1016/j.jallcom.2013.06.077  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Cheng, Hualei;Zhou, Wancheng;Du, Hongliang;Luo, Fa;Zhu, Dongmei;Jiang, Dan;Xu, Boxi;
7:1:10:29     MnO2-modified 0.98(K0.5Na0.5)NbO3-0.02LaFeO(3) ceramics with low dielectric loss for high temperature ceramics capacitors applications
DOI:10.1016/j.ceramint.2013.08.095  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Cheng, Hualei;Zhou, Wancheng;Du, Hongliang;Luo, Fa;Zhu, Dongmei;Xu, Boxi;
7:1:10:30     Reentrant dipole glass properties in (1-x)BaTiO3 - xBiScO(3), 0.1 <= x <= 0.4
DOI:10.1063/1.3675861  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Bharadwaja, S. S. N.;Trolier-McKinstry, S.;Cross, L. E.;Randall, C. A.;
7:1:10:31     Defect mechanisms in high resistivity BaTiO3-Bi(Zn1/2T1/2)O-3 ceramics
DOI:10.1063/1.4752452  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Raengthon, Natthaphon;DeRose, Victoria J.;Brennecka, Geoffrey L.;Cann, David P.;
7:1:10:32     Structural and Dielectric Properties in (1-x)BaTiO3-xBi(Mg(1/2)Tia(1/2))O-3 Ceramics (0.1 <= x <= 0.5) and Potential for High-Voltage Multilayer Capacitors
DOI:10.1111/jace.12312  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Choi, Doo Hyun;Baker, Amanda;Lanagan, Michael;Trolier-McKinstry, Susan;Randall, Clive;
7:1:10:33     Bi(Zn2/3Nb1/3)O-3-(K0.5Na0.5)NbO3 High-Temperature Lead-Free Ferroelectric Ceramics with Low Capacitance Variation in a Broad Temperature Usage Range
DOI:10.1111/jace.12118  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Cheng, Hualei;Du, Hongliang;Zhou, Wancheng;Zhu, Dongmei;Luo, Fa;Xu, Boxi;
7:1:10:34     Visualization of Bi3+ off-centering in the average cubic structure of (Ba0.70Bi0.30)(Ti0.70Fe0.30)O-3 at the electron density level
DOI:10.1063/1.4822032  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Singh, Anar;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;Pandey, Dhananjai;
7:1:10:35     Dipolar-glass-like relaxor ferroelectric behaviour in the 0.5BaTiO(3)-0.5Bi(Mg1/2Ti1/2)O-3 electroceramic
DOI:10.1063/1.4816741  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Wang, Jian;Liu, Yun;Li, Qian;Lau, Kenny;Withers, Ray L.;Li, Zhenrong;Xu, Zhuo;
7:1:10:36     Growth of (111)-oriented BaTiO3-Bi(Mg0.5Ti0.5)O-3 epitaxial films and their crystal structure and electrical property characterizations
DOI:10.1063/1.4704384  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Tanaka, Hidenori;Chentir, Mohamed-Tahar;Yamada, Tomoaki;Yasui, Shintaro;Ehara, Yoshitaka;Yamato, Keisuke;Kashiwagi, Yuta;Theng, Chua Ngeah;Wang, Junling;Okamura, Soichiro;Uchida, Hiroshi;Iijima, Takashi;Wada, Satoshi;Funakubo, Hiroshi;
7:1:10:37     Dielectric properties and relaxor behavior of high Curie temperature (Ba0.85Ca0.15)(Zr0.1Ti0.9)O-3-Bi(Mg0.5Ti0.5)O-3 Lead-free ceramics
DOI:10.1016/j.ceramint.2012.10.028  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Bai, Wangfeng;Hao, Jigong;Shen, Bo;Zhai, Jiwei;
7:1:10:38     High Temperature Capacitors using a BiScO3-BaTiO3-(K1/2Bi1/2)TiO3 Ternary System
DOI:10.1007/s13391-011-0311-8  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:9  AU: Lim, Jong Bong;Zhang, Shujun;Shrout, Thomas R.;
7:1:10:39     High-Temperature Capacitor Based on Ca-Doped Bi05Na0.5TiO3-BaTiO3 Ceramics
DOI:10.1007/s11664-010-1246-9  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2010
  TC:10  AU: Yuan, Y.;Zhou, X. H.;Zhao, C. J.;Li, B.;Zhang, S. R.;
7:1:10:40     Thermally Stable BaTiO3-Bi(Mg0.75W0.25)O-3 Solid Solutions: Sintering Characteristics, Phase Evolution, Raman Spectra, and Dielectric Properties
DOI:10.1007/s11664-014-3030-8  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:4  AU: Chen, Jie;Chen, Xiuli;He, Fen;Wang, Yiliang;Zhou, Huanfu;Fang, Liang;
7:1:10:41     Dielectric and polar order behaviors of BaTiO3-Bi(Mg1/2Ti1/2)O-3 ceramics
DOI:10.1007/s00339-010-6080-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:9  AU: Sun, Ruiting;Wang, Xiaoli;Shi, Jing;Wang, Le;
7:1:10:42     New Lead-Free Relaxor Ferroelectrics Derived from (K0.5Na0.5)NbO3 for High Temperature Applications
DOI:10.1080/00150191003673881  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Du, Hongliang;Zhou, Wancheng;Luo, Fa;Zhu, Dongmei;Qu, Shaobo;Pei, Zhibin;
7:1:10:43     Diffuse Dielectric Behavior of (Bi0.5Na0.5)Zr1-xTixO3 Lead-Free Ceramics
DOI:10.1080/00150193.2013.850387  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Jaiban, Panupong;Jiansirisomboon, Sukanda;Watcharapasorn, Anucha;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar S.;
7:1:10:44     Compositionally driven ferroelectric phase transition in xBiInO(3)-(1-x)BaTiO3: a lead-free perovskite-based piezoelectric material
DOI:10.1063/1.3442504  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Datta, K.;Suard, E.;Thomas, P. A.;
7:1:10:45     Dielectric Properties and Impedance Analysis of K0.5Na0.5NbO3-Ba2NaNb5O15 Ceramics with Good Dielectric Temperature Stability
DOI:10.1111/jace.12514  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Chen, Xiuli;Wang, Yiliang;Chen, Jie;Zhou, Huanfu;Fang, Liang;Liu, Laijun;
7:1:10:46     Li-7 NMR Investigation of Li-Li Pair Ordering in the Paraelectric Phase of Weakly Substitutionally Disordered K1-xLixTaO3
DOI:10.1103/PhysRevLett.105.226402  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:2  AU: Zalar, Bostjan;Lebar, Andrija;Ailion, David C.;Kuzian, R. O.;Kondakova, I. V.;Laguta, V. V.;
7:1:10:47     Effects of Bi(Zn0.5Zr0.5)O-3 addition on the structure and electric properties of BaTiO3 lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2012.10.211  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Chen, Xiuli;Wang, Yiliang;He, Fen;Zhou, Huanfu;Fang, Liang;Liu, Laijun;
7:1:10:48     Enhancement in the piezoelectric properties of BaTiO3-Bi(Mg1/2Ti1/2)O-3-BiFeO3 system ceramics by nanodomain
DOI:10.1016/j.ceramint.2012.10.164  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Mitsui, Ryuta;Fujii, Ichiro;Nakashima, Kouichi;Kumada, Nobuhiro;Kuroiwa, Yoshihiro;Wada, Satoshi;
7:1:10:49     Defect mechanisms in high resistivity BaTiO3-Bi(Zn1/2Ti1/2)O-3 ceramics (vol 101, 112904, 2012)
DOI:10.1063/1.4757256  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Raengthon, Natthaphon;DeRose, Victoria J.;Brennecka, Geoffrey L.;Cann, David P.;
7:1:10:50     Relaxor behaviour of K0.5Bi0.5TiO3-BiScO3 ceramics (vol 100, 202904, 2012)
DOI:10.1063/1.4738751  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Kruea-In, Chatchai;Rujijanagul, Gobwute;Zhu, Fang Yuan;Milne, Steven J.;
7:1:10:51     Dielectric Behavior of (1-x) Bi(Zn1/2Ti1/2)O-3 - xBa(Fe1/2Nb1/2)O-3 Solid Solution Ceramics
DOI:10.1080/00150193.2013.839308  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Daikarn, Keattipong;Satittada, Gannaga;Eitssayeam, Sukum;Intatha, Uraiwan;
7:1:10:52     Phase Structure and Electric Properties of BiMeO3 Modified (K0.5Na0.5) NbO3 Lead-Free Ceramics
DOI:10.1080/00150193.2010.482035  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Jiang, Meng;Zhu, Jiliang;Li, Xuhai;Chen, Siying;Zhu, Jianguo;Xiao, Dingquan;
7:1:11:1     Microstructure, dielectric and ferroelectric properties of (1-x)(0.94Bi(0.5)Na(0.5)TiO(3)-0.06BaTiO(3))-xBiFeO(3) lead-free ceramics synthesized via a high energy ball milling method
DOI:10.1016/j.jallcom.2010.08.012  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:28  AU: Chen, XiaoMing;Gong, XuXu;Li, TingNan;He, Yuan;Liu, Peng;
7:1:11:2     Sol-gel synthesis and characterization of BaTiO3-doped (Bi0.5Na0.5)TiO3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2009.10.140  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:47  AU: Cernea, Marin;Andronescu, Ecaterina;Radu, Roxana;FochiB, Fabio;Galassi, Carmen;
7:1:11:3     Phase transition and piezoelectric properties of lead-free (Bi1/2Na1/2)TiO3-BaTiO3 ceramics
DOI:10.1016/j.ceramint.2014.01.051  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Cho, Jeong-Ho;Jeong, Young-Hun;Nam, Joong-Hee;Yun, Ji-Sun;Park, Yong-Joon;
7:1:11:4     Microstructure, dielectric and ferroelectric properties of (NaxBi0.5)(0.94)Ba0.06TiO3 lead-free ferroelectric ceramics: Effect of Na nonstoichiometry
DOI:10.1016/j.matchemphys.2011.11.039  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:10  AU: Chen, XiaoMing;Ma, HaiYan;Pan, WenYue;Pang, Min;Liu, Peng;Zhou, JianPing;
7:1:11:5     Microstructure, dielectric and ferroelectric properties of 0.94Bi(0.5)Na(0.5)TiO(3)-0.06BaTiO(3) (NBTB) and 0.05BiFeO(3)-0.95NBTB ceramics: Effect of sintering atmosphere
DOI:10.1016/j.jallcom.2010.10.055  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Chen, XiaoMing;Pan, WenYue;Tian, HuanHuan;Gong, XuXu;Bian, XiaoBing;Liu, Peng;
7:1:11:6     Effect of potassium concentration on the structure and electrical properties of lead-free Bi-0.5 (Na,K)(0.5) TiO3-BiAlO3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.12.027  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:14  AU: Ullah, Aman;Ahn, Chang Won;Hussain, Ali;Lee, Sun Young;Kim, Jin Soo;Kim, Ill Won;
7:1:11:7     Structure, dielectric and ferroelectric properties of 0.92Na(0.5)Bi(0.5)TiO(3)-0.06BaTiO(3)-0.02K(0.5)Na(0.5)NbO(3) lead-free ceramics: Effect of Co2O3 additive
DOI:10.1016/j.ceramint.2012.10.208  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Ma, H. Y.;Chen, X. M.;Wang, J.;Huo, K. T.;Lian, H. L.;Liu, P.;
7:1:11:8     Piezoelectric and dielectric properties of Dy2O3-doped (Bi0.5Na0.5)(0.94)Ba0.06TiO3 lead-free ceramics
DOI:10.1016/j.jallcom.2010.09.070  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Chen Zhi-hui;Ding Jian-ning;Mei Lin;Yuan Ning-yi;Zhu Yuan-yuan;
7:1:11:9     Microstructure and electrical properties of (1-x)[0.82Bi(0.5)Na(0.5)TiO(3)-0.18Bi(0.5)K(0.5)TiO(3)]-xBiFeO(3) lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.02.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:22  AU: Zou, Minjiang;Fan, Huiqing;Chen, Lei;Yang, Weiwei;
7:1:11:10     Effect of Dy2O3 on the structure and electrical properties of (Bi0.5Na0.5)(0.94)Ba0.06TiO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.08.117  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Fu, Peng;Xu, Zhijun;Chu, Ruiqing;Li, Wei;Xie, Qian;Zhang, Yanjie;Chen, Qian;
7:1:11:11     Relaxor behavior of (Ba, Bi)(Ti, Al)O-3 ferroelectric ceramic
DOI:10.1063/1.3327244  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:15  AU: Cui, Lei;Hou, Yu-Dong;Wang, Sai;Wang, Chao;Zhu, Man-Kang;
7:1:11:12     Piezoelectric and dielectric properties of Sm2O3-doped 0.82Bi(0.5)Na(0.5)TiO(3)-0.18Bi(0.5)K(0.5)TiO(3) ceramics
DOI:10.1016/j.jallcom.2010.03.241  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:20  AU: Zhang, Yanjie;Chu, Ruiqing;Xu, Zhijun;Hao, Jigong;Chen, Qian;Peng, Fu;Li, Wei;Li, Guorong;Yin, Qingrui;
7:1:11:13     Structure and electrical properties of (Bi0.5Na0.5)(0.94)Ba0.06TiO3-Bi-0.5(Na0.82K0.18)(0.5)TiO3-BiAlO3 lead free piezoelectric ceramics
DOI:10.1016/j.matchemphys.2012.11.033  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:7  AU: Fu, Peng;Xu, Zhijun;Chu, Ruiqing;Li, Wei;Wu, Xueyan;Zhao, Meiju;
7:1:11:14     Structural, dielectric, and piezoelectric properties of fine-grained NBT-BT0.11 ceramic derived from gel precursor
DOI:10.1016/j.jeurceramsoc.2012.02.021  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Cernea, Mann;Galassi, Carmen;Vasile, Bogdan S.;Capiani, Claudio;Berbecaru, Ciceron;Pintilie, Ioana;Pintilie, Lucian;
7:1:11:15     Piezoelectric, ferroelectric and dielectric properties of Nd2O3-doped (Bi0.5Na0.5)(0.94)Ba0.06TiO3 lead-free ceramics
DOI:10.1016/j.mseb.2010.01.057  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:23  AU: Fu, Peng;Xu, Zhijun;Chu, Ruiqing;Li, Wei;Zang, Guozhong;Hao, Jigong;
7:1:11:16     Dielectric properties of (NaBi((1-x))K-x)(0.5)Ti((1-x))NbxO3 ceramics fabricated by mechanical alloying
DOI:10.1016/j.jallcom.2010.07.154  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: Liu, Laijun;Yang, Zhao;Wu, Meixia;Fang, Liang;Hu, Changzheng;
7:1:11:17     Effect of Eu doping on structure and electrical properties of lead-free (Bi0.5Na0.5)(0.94)Ba0.06TiO3 ceramics
DOI:10.1016/j.ceramint.2013.12.028  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Ma, Xiao;Yin, Jiatian;Zhou, Qilai;Xue, Lihong;Yan, Youwei;
7:1:11:18     Dielectric and piezoelectric behaviors of NBT-BT0.05 processed by sol-gel method
DOI:10.1016/j.jeurceramsoc.2011.07.038  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:11  AU: Cernea, Marin;Vasile, Bogdan S.;Capiani, Claudio;Ioncea, Anghel;Galassi, Carmen;
7:1:11:19     Effect of Ba0.91Ca0.09Ti0.916Sn0.084O3 on the microstructure and electrical properties of Bi-0.5(Na0.925Li0.075)(0.5)TiO3 ceramics
DOI:10.1007/s00339-012-7530-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:0  AU: Chen, Tao;Zhang, Ting;Wang, Guangchang;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;
7:1:11:20     High-temperature X-ray diffraction and Raman spectroscopy study of (K0.5Na0.5)NbO3 ceramics sintered in oxidizing and reducing atmospheres
DOI:10.1016/j.matchemphys.2009.11.001  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:13  AU: Fisher, John G.;Rout, Dibyaranjan;Moon, Kyoung-Seok;Kang, Suk-Joong L.;
7:1:11:21     Effect of Nb-doping on dielectric, ferroelectric and conduction behaviour of lead free Bi-0.5(Na0.5K0.5)(0.5)TiO3 ceramic
DOI:10.1016/j.ceramint.2011.08.045  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:18  AU: Kumar, Krishan;Kumar, Binay;
7:1:11:22     Thermal and dynamic mechanical analyses on Bi0.5Na0.5TiO3-BaTiO3 ceramics synthesized with citrate method
DOI:10.1016/j.ceramint.2012.07.052  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:10  AU: Zheng, Xiu-Cheng;Zheng, Guang-Ping;Lin, Zheng;Jiang, Zhi-Yuan;
7:1:11:23     Effect of intermediate phases on the formation of nanostructured lead-free (Bi0.5Na0.5)(0.94)Ba0.06TiO3 piezoceramics by mechanical alloying
DOI:10.1016/j.jallcom.2013.10.192  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Amini, Rasool;Ghazanfari, Mohammad Reza;
7:1:11:24     Phase structure and electric properties of Bi-0.5(Na0.825K0.175)(0.5)TiO3 ceramics prepared by a sol-gel method
DOI:10.1016/j.jallcom.2009.12.104  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Chen, Xiaoming;Liao, Yunwen;Wang, Huaiping;Mao, Lijun;Xiao, Dingquan;Zhu, Jianguo;Chen, Qiang;
7:1:11:25     Effect of Bi2O3 doping methods on the positive temperature coefficient property of Ba-0.999(Bi0.5Na0.5)(0.001) TiO3 ceramics
DOI:10.1016/j.jallcom.2010.05.005  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Liu, Ming-long;Qu, Yuan-fang;Yang, De-an;
7:1:11:26     Piezoelectric and Dielectric Properties of Dy2O3-Doped Bi-0.5 (Na0.82K0.18)(0.5)TiO3 Lead-Free Ceramics
DOI:10.1080/00150193.2011.634752  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Chen Zhi-Hui;Ding Jian-Ning;Mei Lin;Yuan Ning-Yi;Zhang Wei-Wei;
7:1:11:27     Phase-separation-induced self-assembly of controllable PbTiO3 nanodots on Si substrates
DOI:10.1016/j.jallcom.2011.03.102  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:0  AU: Cheng, Kui;Li, Jinna;Weng, Wenjian;Luo, Ming;Du, Piyi;Shen, Ge;Han, Gaorong;
7:1:11:28     Morphotropic phase boundary in the BNT-BT-BKT system
DOI:10.1016/j.ceramint.2011.11.053  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:11  AU: Trelcat, Jean-Francois;Courtois, Christian;Rguiti, Mohamed;Leriche, Anne;Duvigneaud, Paul-Henri;Segato, Tiriana;
7:1:11:29     Phase structure and piezoelectric properties of NBT-KBT-BT ceramics prepared by sol-gel flame synthetic approach
DOI:10.1016/j.jallcom.2014.06.031  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Li, W. L.;Cao, W. P.;Xu, D.;Wang, W.;Fei, W. D.;
7:1:11:30     Dielectric spectroscopy of lead-free Bi-0.5(Na0.75K0.25)(0.5)TiO3-BiAlO3 ceramics
DOI:10.1016/j.ceramint.2014.03.116  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Ullah, Amir;Ullah, Aman;Woo, Won Seok;Ahn, Chang Won;Kim, Ill Won;
7:1:11:31     Synthesis, sintering, and characterization of BNT perovskite powders prepared by the solution combustion method
DOI:10.1016/j.ceramint.2013.03.088  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Ma, Xiao;Xue, Lihong;Wan, Li;Yin, Shengming;Thou, Qilai;Yan, Youwei;
7:1:11:32     Structure and electrical properties of (1-x) (Bi-0.5 (Na0.82K0.18)(0.5)) TiO3-x BiAlO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2012.04.050  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Fu, Peng;Xu, Zhijun;Chu, Ruiqing;Wu, Xueyan;Li, Wei;Zhao, Meiju;
7:1:11:33     Temperature dependent phase transition of (Bi0.5Na0.5)(1-x)BaxTiO3 lead-free piezoelectric
DOI:10.1016/j.ceramint.2012.10.057  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Utami, Brianti Satrianti;Chen, Cheng-Nan;Chou, Chen-Chia;Liang, Jaw-Yeu;Chen, Pin-Yi;Chen, Cheng-Sao;
7:1:11:34     The structural and electric properties of Li- and K-substituted Bi0.5Na0.5TiO3 ferroelectric ceramics
DOI:10.1016/j.jallcom.2010.10.041  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:12  AU: Lu, Wenzhong;Wang, Ying;Fan, Guifen;Wang, Xiaohong;Liang, Fei;
7:1:11:35     Structural and electrical properties of NBT-BT0.08 ceramic prepared by the pyrosol method
DOI:10.1016/j.ceramint.2013.01.015  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Ghitulica, Cristina;Cernea, Marin;Vasile, Bogdan Stefan;Andronescu, Ecaterina;Vasile, Otilia Ruxandra;Dragoi, Cristina;Trusca, Roxana;
7:1:11:36     Microstructural Investigations and Electric Field-induced Strain of (1-x)(Bi0.5Na0.5)TiO3-xBaTiO(3) Lead-Free Ferroelectric Ceramics
DOI:10.1080/10584587.2013.849558  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Chou, Chen-Chia;Feng, Kuei-Chih;Utami, Brianti Satrianti;Chen, Cheng-Nan;Chen, Chen-Sao;
7:1:11:37     Phase Transition and Electrical Properties of BiAlO3-Modified (Bi0.5Na0.5)TiO3 Piezoelectric Ceramics
DOI:10.1080/00150193.2010.482490  JN:FERROELECTRICS  PY:2010
  TC:11  AU: Ullah, Aman;Ahn, Chang Won;Jang, Ki Bong;Hussain, Ali;Kim, Ill Won;
7:1:11:38     Microstructure and electrical properties of PLZT ceramics from Pb3O4 as the lead source
DOI:10.1016/j.jallcom.2010.11.135  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Zhang, Jihua;Mo, Shangjun;Wang, Huayi;Zhen, Shanxue;Chen, Hongwei;Yang, Chuanren;
7:1:11:39     Electrical and Piezoelectric Studies of (Na1-xKx)(1/2)Bi1/2TiO3
DOI:10.1080/10584587.2010.503803  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Rao, P. Vijaya Bhaskar;Sankaram, T. Bhima;
7:1:11:40     Optical Properties of Lead-Free NKN Films from Transmission and Spectral Ellipsometry
DOI:10.1080/00150193.2013.821018  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Schwarz, R.;Santos, L.;Ayouchi, R.;Bhattacharyya, S. R.;Mardolcar, U.;Leal, M.;Kholkin, A.;
7:1:12:1     Effect of sintering temperature and time on densification, microstructure and properties of the PZT/ZnO nanowhisker piezoelectric composites
DOI:10.1016/j.jallcom.2011.03.186  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:12  AU: Wang, Da-Wei;Cao, Mao-Sheng;Yuan, Jie;Lu, Ran;Li, Hong-Bo;Lin, Hai-Bo;Zhao, Quan-Liang;Zhang, De-Qing;
7:1:12:2     Effect of ZnO whisker content on sinterability and fracture behaviour of PZT peizoelectric composites
DOI:10.1016/j.jallcom.2010.05.067  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:22  AU: Yuan, Jie;Wang, Da-Wei;Lin, Hai-Bo;Zhao, Quan-Liang;Zhang, De-Qing;Cao, Mao-Sheng;
7:1:12:3     Effects of CuO addition on the electrical responses of the low-temperature sintered Pb(Zr0.52Ti0.48)O-3-Pb(Mg1/3Nb2/3)O-3-Pb(Zn1/3Nb2/3)O-3 ceramics
DOI:10.1016/j.jallcom.2009.11.048  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:23  AU: Chao, Xiaolian;Ma, Difei;Gu, Rui;Yang, Zupei;
7:1:12:4     Enhanced Piezoelectric and Ferroelectric Properties of Nb2O5 Modified Lead Zirconate Titanate-Based Composites
DOI:10.1111/j.1551-2916.2010.04309.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:21  AU: Wang, Da-Wei;Cao, Mao-Sheng;Yuan, Jie;Zhao, Quan-Liang;Li, Hong-Bo;Zhang, De-Qing;Agathopoulos, Simeon;
7:1:12:5     Effects of Nb2O5 addition on the microstructure, electrical, and mechanical properties of PZT/ZnO nanowhisker piezoelectric composites
DOI:10.1007/s10853-011-6094-3  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:4  AU: Wang, Da-Wei;Yuan, Jie;Li, Hong-Bo;Lu, Ran;Zhao, Quan-Liang;Zhang, De-Qing;Cao, Mao-Sheng;
7:1:12:6     Investigation of Ternary System PbHfO3-PbTiO3-Pb(Mg1/3Nb2/3)O3 with Morphotropic Phase Boundary Compositions
DOI:10.1111/j.1551-2916.2012.05300.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:13  AU: Wang, Dawei;Cao, Maosheng;Zhang, Shujun;
7:1:12:7     Effects of Nb, Mn doping on the Structure, Piezoelectric, and Dielectric Properties of 0.8Pb(Sn0.46Ti0.54)O-3-0.2Pb(Mg1/3Nb2/3)O-3 Piezoelectric Ceramics
DOI:10.1111/jace.12479  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Li, Yong;Yuan, Jie;Wang, Dawei;Zhang, Deqing;Jin, Haibo;Cao, Maosheng;
7:1:12:8     Enhanced piezoelectric and mechanical properties of ZnO whiskers and Sb2O3 co-modified lead zirconate titanate composites
DOI:10.1016/j.matlet.2010.05.037  JN:MATERIALS LETTERS  PY:2010
  TC:17  AU: Cao, Mao-Sheng;Wang, Da-Wei;Yuan, Jie;Lin, Hai-Bo;Zhao, Quan-Liang;Song, Wei-Li;Zhang, De-Qing;
7:1:12:9     Preparation and electrical properties of Pb(Zr0.52Ti0.48)O-3 thick films embedded with ZnO nanowhiskers by a hybrid sol-gel route
DOI:10.1016/j.jallcom.2009.11.062  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:19  AU: Zhao, Q. L.;Cao, M. S.;Yuan, J.;Song, W. L.;Lu, R.;Wang, D. W.;Zhang, D. Q.;
7:1:12:10     Dielectric properties of PbTiO3/ZnO ceramic nanocomposites obtained by solid-state reaction method
DOI:10.1016/j.jallcom.2010.12.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Wongmaneerung, R.;Choopan, S.;Yimnirun, R.;Ananta, S.;
7:1:12:11     Thickness effect on electrical properties of Pb(Zr0.52Ti0.48)O-3 thick films embedded with ZnO nanowhiskers prepared by a hybrid sol-gel route
DOI:10.1016/j.matlet.2009.12.028  JN:MATERIALS LETTERS  PY:2010
  TC:21  AU: Zhao, Q. L.;Cao, M. S.;Yuan, J.;Lu, R.;Wang, D. W.;Zhang, D. Q.;
7:1:12:12     Investigation of ternary system Pb(Sn,Ti)O-3-Pb(Mg1/3Nb2/3)O-3 with morphotropic phase boundary compositions
DOI:10.1016/j.jeurceramsoc.2011.08.038  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:16  AU: Wang, Dawei;Cao, Maosheng;Zhang, Shujun;
7:1:12:13     Piezoelectric Ceramics in the PbSnO3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 Ternary System
DOI:10.1111/j.1551-2916.2011.04857.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:12  AU: Wang, Dawei;Cao, Maosheng;Zhang, Shujun;
7:1:12:14     Fabrication, temperature stability and characteristics of Pb(ZrxTiy)O-3-Pb(Zn1/3Nb2/3)O-3-Pb(Ni1/3Nb2/3)O-3 piezoelectric ceramics bimorph
DOI:10.1016/j.ceramint.2011.12.048  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Chao, Xiaolian;Yang, Lili;Pan, Hong;Yang, Zupei;
7:1:12:15     Microstructure, temperature stability and electrical properties of ZnO-modified Pb(Ni1/3Nb2/3)O-3-Pb(Fe1/2Nb1/2)O-3-Pb(Zr0.3Ti0.7)O-3 piezoelectric ceramics
DOI:10.1016/j.ceramint.2013.05.055  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Du, Jianzhou;Qiu, Jinhao;Zhu, Kongjun;Ji, Hongli;
7:1:12:16     Fabrication and mechanical reinforcement of piezoelectric nanocomposites with ZrO2 nanoparticles embedded in situ
DOI:10.1016/j.jallcom.2009.10.222  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Wu, Yugong;Feng, Tiecheng;
7:1:12:17     Piezoelectric Property and Strain Behavior of Pb(Yb0.5Nb0.5)O3-PbHfO3-PbTiO3 Polycrystalline Ceramics
DOI:10.1111/jace.12389  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:9  AU: Tang, Hua;Zhang, Shujun;Feng, Yujun;Li, Fei;Shrout, Thomas R.;
7:1:12:18     Electrical properties and temperature behavior of ZnO-doped PZT-PMnN modified piezoelectric ceramics and their applications on therapeutic transducers
DOI:10.1016/j.jallcom.2011.08.009  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:9  AU: Tsai, Cheng-Che;Hong, Cheng-Shong;Shih, Chia-Chi;Chu, Sheng-Yuan;
7:1:12:19     Effects of ZnO on the dielectric, conductive and piezoelectric properties of low-temperature-sintered PMnN-PZT based hard piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2011.04.022  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Tsai, Cheng-Che;Chu, Sheng-Yuan;Hong, Cheng-Shong;Chen, Shih-Fang;
7:1:12:20     Investigation of dielectric and piezoelectric properties in Pb(Ni1/3Nb2/3)O-3-PbHfO3-PbTiO3 ternary system
DOI:10.1016/j.jeurceramsoc.2013.04.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Tang, H.;Zhang, M. F.;Zhang, S. J.;Feng, Y. J.;Li, F.;Shrout, T. R.;
7:1:12:21     Large-strain 0.7Pb(ZrxTi1-x)O-3-0.1Pb(Zn1/3Nb2/3)O-3-0.2Pb(Ni1/3Nb2/3)O-3 piezoelectric ceramics for high-temperature application
DOI:10.1016/j.jeurceramsoc.2013.11.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:6  AU: Liu, Qun;Sun, Qingchi;Ma, Weibing;Li, Minmin;Xu, Qing;Zhang, Qi;
7:1:12:22     Phase field simulations of ferroelastic toughening: The influence of phase boundaries and domain structures
DOI:10.1016/j.actamat.2012.06.023  JN:ACTA MATERIALIA  PY:2012
  TC:2  AU: Sluka, Tomas;Webber, Kyle G.;Colla, Enrico;Damjanovic, Dragan;
7:1:12:23     Effect of addition of Ba(W0.5Cu0.5)O-3 in Pb(Mg1/3Nb2/3)O-3-Pb(Zn1/3Nb2/3)O-3-Pb(Zr0.52Ti0.48)O-3 ceramics on the sintering temperature, electrical properties and phase transition
DOI:10.1016/j.jallcom.2010.09.085  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Chao, Xiaolian;Yang, Zupei;Xiong, Lirong;Li, Zhao;
7:1:12:24     Influence of phase transition induced by residual stress on ferroelectric properties of highly (100)-oriented Pb(Zr0.52Ti0.48)O-3 thin films
DOI:10.1016/j.jallcom.2009.12.143  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Liu, C. Q.;Li, W. L.;Fei, W. D.;Zhang, S. Q.;Wang, J. N.;
7:1:12:25     Synthesis and characterization of thick PZT films via sol-gel dip coating method
DOI:10.1016/j.apsusc.2014.07.087  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Shakeri, Amid;Abdizadeh, Hossein;Golobostanfard, Mohammad Reza;
7:1:12:26     The Piezoelectric and Dielectric Properties of 0.3Pb(Ni1/3Nb2/3)O-3-xPbTiO(3)-(0.7-x)PbZrO3 Ferroelectric Ceramics Near the Morphotropic Phase Boundary
DOI:10.1111/j.1551-2916.2009.03432.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:14  AU: Cao, Ruijuan;Li, Guorong;Zeng, Jiangtao;Zhao, Suchuan;Zheng, Liaoying;Yin, Qingrui;
7:1:12:27     Effects of Fe2O3 doping on the microstructure and piezoelectric properties of 0.55Pb (Ni1/3Nb2/3)O-3-0.45Pb(Zr0.3Ti0.7)O-3 ceramics
DOI:10.1016/j.matlet.2011.08.038  JN:MATERIALS LETTERS  PY:2012
  TC:12  AU: Du, Jianzhou;Qiu, Jinhao;Zhu, Kongjun;Ji, Hongli;Pang, Xuming;Luo, Jun;
7:1:12:28     Study on Pb(Mg1/3Ta2/3)O-3-Pb(Mn1/3Sb2/3)O-3-Pb(ZrxTi1-x)O-3 high power piezoelectric ceramics near the morphotropic phase boundary
DOI:10.1016/j.jallcom.2010.08.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: Cheng, Yu;Yang, Ying;Wang, Yiping;Meng, Hanqi;
7:1:12:29     Microstructure and electrical properties of lead free potassium sodium niobate piezoceramics with nano ZnO additive
DOI:10.1016/j.mseb.2010.04.033  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:10  AU: Hayati, R.;Barzegar, A.;
7:1:12:30     A new Pb(Lu1/2Nb1/2)O-3-PbZrO3-PbTiO3 ternary solid solution with morphotropic region and high Curie temperature
DOI:10.1016/j.ceramint.2012.10.184  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Li, Tao;Li, Xiuzhi;Wang, Zujian;Liu, Ying;He, Chao;Ai, Liaodong;Chu, Tao;Pang, Dongfang;Long, Xifa;
7:1:12:31     Piezoelectric Ceramics for Use in Multilayer Actuators and Energy Harvesters
DOI:10.1111/jace.13079  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Hur, Joon;Seo, In-Tae;Kim, Dae-Hyeon;Nahm, Sahn;Ryu, Jungho;Han, Seung Ho;Kang, Chong-Yun;Yoon, Seok-Jin;
7:1:12:32     Fabrication and Characterization of PZT/CuO Thin Film
DOI:10.1080/10584587.2013.852042  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Sreesattabud, Tharathip;Gibbons, Brady J.;Watcharapasorn, Anucha;Naksata, Manoch;Jiansirisomboon, Sukanda;
7:1:12:33     Investigation of hydrogen effects on the properties of Pb(Zr,Ti)O-3 in tetragonal phase using water electrolysis technique
DOI:10.1063/1.3665044  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Shafiei, A.;Nickchi, T.;Oprea, C.;Alfantazi, A.;Troczynski, T.;
7:1:12:34     Active sensing and damage detection using piezoelectric zinc oxide-based nanocomposites
DOI:10.1088/0957-4484/24/18/185501  JN:NANOTECHNOLOGY  PY:2013
  TC:4  AU: Meyers, Frederick N.;Loh, Kenneth J.;Dodds, John S.;Baltazar, Arturo;
7:1:12:35     Structure evolution and stoichiometry control of Pb(Zr, Ti)O-3 thick films fabricated by electrospray assisted vapour deposition
DOI:10.1016/j.apsusc.2010.02.059  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:2  AU: Du, Jing;Wu, Yiquan;Choy, Kwang-Leong;Shipway, Philip H.;
7:1:12:36     Influence of Tm-doping on microstructure and luminescence behavior of barium strontium titanate thick films
DOI:10.1016/j.apsusc.2011.11.083  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:2  AU: Wang, Jingyang;Zhang, Tianjin;Pan, Ruikun;Ma, Zhijun;Wang, Jinzhao;
7:1:12:37     Low-Temperature Processing of PZT Thick Film by Seeding and High-Energy Ball Milling and Studies on Electrical Properties
DOI:10.1007/s11664-013-2747-0  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:0  AU: Dutta, Soma;Jeyaseelan, A. Antony;Sruthi, S.;
7:1:12:38     Preparation and Study of Bismuth Rare-Earth Tungstate Composite Screen-Printed Thick Films
DOI:10.1007/s11664-012-2428-4  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:0  AU: Rocha, G. N.;Melo, L. F. L.;Dantas, S. M.;Ayala, A. P.;Sombra, A. S. B.;Almeida, A. F. L.;de Menezes, A. S.;Fechine, P. B. A.;
7:1:12:39     Electrical and mechanical property study on three-component polyimide nanocomposite films with titanium dioxide and montmorillonite
DOI:10.1016/j.tsf.2013.02.100  JN:THIN SOLID FILMS  PY:2013
  TC:4  AU: Liu, Xiaoxu;Yin, Jinghua;Kong, Yunan;Chen, Minghua;Feng, Yu;Yan, Kai;Li, Xiuhong;Su, Bo;Lei, Qingquan;
7:1:12:40     Modified Pb(Yb,Nb)O-3-PbZrO3-PbTiO3 ternary system for high temperature applications
DOI:10.1016/j.ceramint.2011.07.003  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Lim, Jong Bong;Zhang, Shujun;Shrout, Thomas R.;
7:1:12:41     Physical and dielectric properties of sol-gel derived ZnO-doped Zr0.8Sn0.2TiO4 dielectric thin films
DOI:10.1016/j.jallcom.2009.10.238  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:3  AU: Hsu, Cheng-Hsing;Chung, Ching-Yi;
7:1:12:42     Effect of annealing on microstructure of CuO-doped (Zr0 8Sn0 2)TiO4
DOI:10.1016/j.jallcom.2010.09.127  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Vahabzadeh, S.;Golozar, M. A.;Ashrafizadeh, F.;
7:1:12:43     Crystallitic orientation effects on charge transport in polythiophene thin-film transistors
DOI:10.1063/1.3310023  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Zhou, Liping;Wang, Xue-Feng;Han, Qin;Wu, Jian-Chun;Li, Zhen-Ya;
7:1:12:44     Synthesis and Characterization of PZT Thin Films Embedded with WO3 Nanoparticles by a Hybrid Chemical Solution Route
DOI:10.1080/10584587.2012.737212  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Sreesattabud, Tharathip;Gibbons, Brady J.;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:1:12:45     Preparation of Bi0.85Nd0.15FeO3 Nanotube Arrays by a Sol-Gel Template Method
DOI:10.1007/s11664-010-1495-7  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2011
  TC:2  AU: Guo, Dongyun;Gong, Yiping;Liu, Changyong;Wang, Chuanbin;Shen, Qiang;Zhang, Lianmeng;
7:1:12:46     Experimental investigation of the effects of water electrolysis parameters on the amount of hydrogen damage in Pb(Zr,Ti)O-3
DOI:10.1007/s10853-013-7729-3  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:0  AU: Shafiei, A.;Alfantazi, A.;
7:1:12:47     High-power properties of piezoelectric hard materials sintered at low temperature for multilayer ceramic actuators
DOI:10.1016/j.jeurceramsoc.2013.02.014  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Yoo, So-Yeon;Ha, Jong-Yoon;Yoon, Seok-Jin;Choi, Ji-Won;
7:1:12:48     Study of the Kramers rare earth ions ground multiplet with a large orbital contribution by multifrequency EPR spectroscopy: Ce3+ in PbWO4 scintillator
DOI:10.1016/j.optmat.2009.11.015  JN:OPTICAL MATERIALS  PY:2010
  TC:7  AU: Popescu, F. F.;Bercu, V.;Barascu, J. N.;Martinelli, M.;Massa, C. A.;Pardi, L. A.;Stefan, M.;Nistor, S. V.;Nikl, M.;
7:1:12:49     Varistor properties of ZnO-Pr6O11-CoO-Cr2O3-Y2O3-In2O3 ceramics
DOI:10.1016/j.matlet.2011.01.064  JN:MATERIALS LETTERS  PY:2011
  TC:2  AU: Nahm, Choon-W.;
7:1:12:50     Dielectric and piezoelectric properties of La doped lead zinc niobate-lead zirconium titanate ceramics prepared from mechano-chemically activated powders
DOI:10.1016/j.mseb.2010.05.007  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:5  AU: Laishram, Radhapiyari;Thakur, O. P.;Bhattacharya, D. K.;Harsh;
7:1:13:1     Phase transition and piezoelectric properties of K0.48Na0.52NbO3-LiTa0.5Nb0.5O3-NaNbO3 lead-free ceramics
DOI:10.1016/j.jallcom.2011.03.004  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:16  AU: Gao Feng;Liu Liangliang;Xu Bei;Cao Xiao;Deng Zhenqi;Tian Changsheng;
7:1:13:2     Effects of Sb content on electrical properties of lead-free piezoelectric [(Na0.535K0.480)(0.942)Li-0.058](Nb1-xSbx)O-3 ceramics
DOI:10.1016/j.jallcom.2009.09.172  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:27  AU: Zhang, Qian;Zhang, Bo-Ping;Li, Hai-Tao;Shang, Peng-Peng;
7:1:13:3     Effect of MnO doping on the structure, microstructure and electrical properties of the (K,Na,Li)(Nb,Ta,Sb)O-3 lead-free piezoceramics
DOI:10.1016/j.jallcom.2011.06.080  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:13  AU: Rubio-Marcos, F.;Marchet, P.;Vendrell, X.;Romero, J. J.;Remondiere, F.;Mestres, L.;Fernandez, J. F.;
7:1:13:4     Structure and electrical properties of Li- and Ta-substituted K0.5Na0.5NbO3 lead-free piezoelectric ceramics prepared from nanopowders
DOI:10.1016/j.jallcom.2010.02.181  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:23  AU: Singh, K. Chandramani;Jiten, Chongtham;Laishram, Radhapiyari;Thakur, O. P.;Bhattacharya, D. K.;
7:1:13:5     Effect of CuO on dielectric and piezoelectric properties of (K0.4425Na0.52Li0.0375)(Nb0.87Ta0.06Sb0.07)O-3 ceramics
DOI:10.1016/j.jallcom.2011.11.120  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Shao, Bin;Qiu, Jin-Hao;Zhu, Kong-Jun;Cao, Yang;Ji, Hong-Li;
7:1:13:6     Improved piezoelectric properties of (KxNa1-x)(0.94)Li0.06NbO3 lead-free ceramics fabricated by combining two-step sintering
DOI:10.1016/j.jallcom.2012.04.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:15  AU: Hao, Jigong;Bai, Wangfeng;Shen, Bo;Zhai, Jiwei;
7:1:13:7     Microstructure and piezoelectric properties of CuO added (K, Na, Li)NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2010.10.033  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:33  AU: Azough, F.;Wegrzyn, M.;Freer, R.;Sharma, S.;Hall, D.;
7:1:13:8     Phase structures, electrical properties and temperature stability of (1-x)[(K0.458Na0.542)(0.96)Li-0.04](Nb0.85Ta0.15)O-3-xBiFeO(3) ceramics
DOI:10.1016/j.jallcom.2011.11.104  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Chao, Xiaolian;Yang, Zupei;Li, Zhao;Li, Yanyan;
7:1:13:9     Dielectric, piezoelectric properties of MnO2-doped (K0.5Na0.5) NbO3-0.05LiNbO(3) crystal grown by flux-Bridgman method
DOI:10.1016/j.jallcom.2014.03.006  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Liu, Ying;Xu, Guisheng;Liu, Jinfeng;Yang, Danfeng;Chen, Xiaxia;
7:1:13:10     Sb doping effects on the piezoelectric and ferroelectric characteristics of lead-free Na0.5K0.5Nb1-x SbxO3 piezoelectric ceramics
DOI:10.1016/j.ceramint.2011.04.120  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:18  AU: Chan, I-Hao;Sun, Chieh-Tze;Houng, Mau-Phon;Chu, Sheng-Yuan;
7:1:13:11     The effects of Bi(Mg2/3Nb1/3)O-3 on piezoelectric and ferroelectric properties of K0.5Na0.5NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.07.153  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:14  AU: Zhao, Jingbo;Du, Hongliang;Qu, Shaobo;Wang, Jiafu;Zhang, Hongmei;Yang, Yiming;Xu, Zhuo;
7:1:13:12     BiScO3-modified (K0.475Na0.475Li0.05)(Nb0.95Sb0.05)O-3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.01.129  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:13  AU: Li, Xuhai;Zhu, Jiliang;Wang, Mingsong;Luo, Yuansheng;Shi, Wei;Li, Lihua;Zhu, Jianguo;Xiao, Dingquan;
7:1:13:13     Disk-type piezoelectric transformer of a Na0.5K0.5NbO3-CuNb2O6 lead-free ceramic for driving T5 fluorescent lamp
DOI:10.1016/j.jallcom.2011.10.062  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:0  AU: Yang, Ming-Ru;Chu, Sheng-Yuan;Chan, I-Hao;Yang, Song-Ling;
7:1:13:14     Crystal structure and properties of K0.5Na0.5NbO3-Bi0.5Na0.5TiO3-LiSbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.07.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Liu, Yixiong;Huang, Yanqiu;Du, Haiwei;Li, Huilin;Zhang, Guoxi;
7:1:13:15     Microstructure and electrical properties of Li0.5Bi0.5TiO3-modified (Na0.5K0.5)NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2009.12.079  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:18  AU: Jiang, Xiang-Ping;Yang, Qing;Yu, Zu-Deng;Hu, Fei;Chen, Chao;Tu, Na;Li, Yue-Ming;
7:1:13:16     Dielectric and piezoelectric characteristics of the non-stoichiometric (Na,K)NbO3 ceramics doped with CuO
DOI:10.1016/j.jallcom.2010.07.102  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:25  AU: Lee, Yuhyong;Yoo, Juhyun;Lee, Kabsoo;Kim, Insung;Song, Jaesung;Park, Yong-Wook;
7:1:13:17     Effect of CuO and MnO2 doping on electrical properties of 0.92(K0.48Na0.54)NbO3-0.08LiNbO(3) under low-temperature sintering
DOI:10.1016/j.jallcom.2009.10.168  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:22  AU: Yin, Qiyi;Yuan, Shuoguo;Dong, Qiang;Tian, Changan;
7:1:13:18     Effects of Sb-doping on the formation of (K, Na)(Nb, Sb)O-3 solid solution under hydrothermal conditions
DOI:10.1016/j.jallcom.2009.12.045  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Su, Likui;Zhu, Kongjun;Bai, Lin;Qiu, Jinhao;Ji, Hongli;
7:1:13:19     Effects of the co-addition of LiSbO3-LiTaO3 on the densification of (Na1/2K1/2)NbO3 lead free ceramics by atmosphere sintering
DOI:10.1016/j.jallcom.2010.11.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:10  AU: Jiang, Na;Fang, Bijun;Wu, Jian;Du, Qingbo;
7:1:13:20     Low temperature sintering of ZnO and MnO2-added (Na0.5K0.5)NbO3 ceramics
DOI:10.1016/j.jeurceramsoc.2012.01.030  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:17  AU: Kang, In-Young;Seo, In-Tae;Cha, Yu-Joung;Choi, Jae-Hong;Nahm, Sahn;Sung, Tae-Hyun;Paik, Jong-Hoo;
7:1:13:21     Effects of MnO doping on properties of 0.97K(0.5)Na(0.5)NbO(3)-0.03(Bi0.5K0.5)TiO3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2010.06.200  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Jiang, X. P.;Chen, Y.;Lam, K. H.;Choy, S. H.;Wang, J.;
7:1:13:22     Crystal structures and electrical properties of (1-x)K0.5Na0.5NbO3-xBi(0.8)La(0.2)FeO(3) lead-free ceramics
DOI:10.1016/j.jallcom.2010.11.037  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Zhang, Chong;Chen, Zhong;Ji, Wei-jing;Wang, Lei;Chen, Y. B.;Yao, Shu-Hua;Zhang, Shan-Tao;Chen, Yan-Feng;
7:1:13:23     Piezoelectric properties of Li-Ta co-doped potassium-sodium niobate ceramics prepared by spark plasma and conventional sintering
DOI:10.1016/j.jallcom.2010.12.103  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Lopez-Juarez, Rigoberto;Gonzalez-Garcia, Federico;Zarate-Medina, Juan;Escalona-Gonzalez, Ricardo;Diaz de la Torre, Sebastian;Villafuerte-Castrejon, Maria-Elena;
7:1:13:24     Structure and electrical properties of MnO2-doped Sr2-xCaxNaNb5O15 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2011.03.130  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Fan, Xiujun;Wang, Yue;Jiang, Yijian;
7:1:13:25     An enhanced mechanical quality factor and a low dielectric loss in lithium sodium niobate lead-free ceramics
DOI:10.1016/j.ceramint.2012.01.059  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Cheng, Xiaojing;Wu, Jiagang;Xiao, Dingquan;Zhu, Jianguo;
7:1:13:26     Doping effects of Li-Sb content on the structure and electrical properties of [(Na0.5K0.5)(1) (-) (x)(Li)(x)(Sb)(x)(Nb)(1) (-) O-x(3)] lead-free piezoelectric ceramics
DOI:10.1016/j.materresbull.2011.11.003  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:6  AU: Rani, Rashmi;Sharma, Seema;Rai, Radheshyam;Kholkin, Andrei L.;
7:1:13:27     Phase transition and electrical properties of (1-x)K0.02Na0.98NbO3-xBaTiO(3) ceramics
DOI:10.1016/j.jallcom.2011.02.152  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Zeng, Jiangtao;Zheng, Liaoying;Li, Guorong;Cao, Zhenzhu;Zhao, Kunyu;Yin, Qingrui;Politova, Ekaterina D.;
7:1:13:28     Effects of Sb content on electrical properties of lead-free piezoelectric (K0.4425Na0.52Li0.0375) (Nb0.9625-xSbxTa0.0375)O-3 ceramics
DOI:10.1016/j.ceramint.2011.08.056  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Pang, Xuming;Qiu, Jinhao;Zhu, Kongjun;Cao, Yang;
7:1:13:29     Structural and electrical characterization of (K0.48Na0.52)(0.96)Li0.04Nb0.85Ta0.15O3 synthesized by spray drying
DOI:10.1016/j.jeurceramsoc.2009.10.023  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Lopez, Rigoberto;Gonzalez, Federico;Villafuerte-Castrejon, M. E.;
7:1:13:30     Piezoelectric and Dielectric Properties of Nonstoichiometric (Na0.5K0.5)(0.97)(Nb0.90Ta0.1)O-3 Ceramics Doped with MnO2
DOI:10.1007/s11664-012-2206-3  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:2  AU: Park, Minho;Yoo, Juhyun;
7:1:13:31     Electrical Properties and Impedance Spectroscopy of Lithium Modified Potassium Sodium Niobate Ceramics
DOI:10.1080/00150193.2013.821914  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Mensur-Alkoy, Ebru;Berksoy-Yavuz, Ayse;Alkoy, Sedat;
7:1:13:32     Effect of various sintering aids on the piezoelectric and dielectric properties of 0.98(Na0.5K0.5)NbO3-0.02Li(0.04)(Sb0.06Ta0.1)O-3 ceramics
DOI:10.1016/j.materresbull.2014.04.057  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:3  AU: Kim, Hong-Ki;Lee, Seung-Hwan;Lee, Sung-Gap;Lee, Ku-Tak;Lee, Young-Hie;
7:1:13:33     Effects of K/Na ratio on the phase structure and electrical properties of 0.98(KxNa1-x)NbO3-0.02BiScO(3) lead-free ceramics
DOI:10.1016/j.ceramint.2011.04.117  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Liu, Jing;Zhu, Jiliang;Wang, Mingsong;Pu, Yunti;Li, Xuhai;Sun, Ping;Feng, Lei;Zhu, Xiaohong;Zhu, Jianguo;Xiao, Dingquan;
7:1:13:34     Ferroelectrics, Piezoelectric, and Impedance Spectroscopy Characterizations of CuO Doped (Na-0.52 K-0.44)(Nb-0.9 Sb-0.06)O-3 -0.04LiTaO(3) Lead Free Ceramics
DOI:10.1080/00150193.2014.975574  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Saidi, M.;Khalfaoui, K.;Chaouchi, A.;D'Astorg, S.;Rguiti, M.;Courtois, C.;
7:1:13:35     Effects of Dopants on Phase Formation and Microstructure of Bismuth Sodium Titanate-Potassium Sodium Niobate Ceramics
DOI:10.1080/00150193.2013.850975  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Wongsaenmai, S.;Yimnirun, R.;Laoratanakul, P.;
7:1:13:36     X-Ray Absorption Spectroscopy Analysis of the Effect of MnO2 Doping on Local Structure of ((K0.5Na0.5)(0.935)Li-0.065)NbO3 Ceramics
DOI:10.1080/10584587.2014.905354  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Kanchiang, Kanokwan;Pramchu, Sittichain;Wongsaenmai, Supattra;Yimnirun, Rattikorn;Laosiritaworn, Yongyut;
7:1:13:37     Structural and piezoelectric properties of barium-modified lead-free (K0.455Li0.045Na0.5)(Nb0.9Ta0.1)O-3 ceramics
DOI:10.1007/s10853-013-7355-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:3  AU: Gaur, Roopam;Singh, K. Chandramani;Laishram, Radhapiyari;
7:1:13:38     Dielectric and Piezoelectric Properties of [Li-0.04(Na0.54K0.46)(0.96)] (Nb0.84Ta0.10Sb0.06)O-3 Lead-Free Ceramics as a Function of (Bi,Na)TiO3 Substitution
DOI:10.1080/00150193.2011.639226  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Byenon, Sunmin;Yoo, Juhyun;
7:1:13:39     Calcination Effects on the Piezoelectric Properties for Ag2O Doped 0.94(K0.5Na0.5)NbO3-0.06LiNbO(3) Lead-Free Piezoelectric Ceramics
DOI:10.1080/00150193.2012.676965  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Chae, Moon-Soon;Koh, Jung-Hyuk;
7:1:13:40     Effect of Na Excess on Dielectric and Piezoelectric Properties of (Li0.04Na0.544+xK0.46)(0.96)(Nb0.81Ta0.15Sb0.04)O-3 Ceramics
DOI:10.1080/00150193.2013.822777  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Noh, Jung-Rae;Yoo, Ju-Hyun;
7:1:14:1     Piezoelectric Materials for High Temperature Sensors
DOI:10.1111/j.1551-2916.2011.04792.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:99  AU: Zhang, Shujun;Yu, Fapeng;
7:1:14:2     Dielectric and piezoelectric properties of Sb5+ doped (NaBi)(0.38)(LiCe)(0.05)[](0.14)Bi2Nb2O9 ceramics
DOI:10.1016/j.jallcom.2011.06.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:13  AU: Peng, Zhihang;Chen, Qiang;Wu, Jiagang;Zhu, Xiaohong;Xiao, Dingquan;Zhu, Jianguo;
7:1:14:3     Structure and electrical properties of new Aurivillius oxides (K0.16Na0.84)(0.5)Bi4.5Ti4O15 with manganese modification
DOI:10.1016/j.jallcom.2014.01.152  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Fang, Pinyang;Liu, Peng;Xi, Zengzhe;Long, Wei;Li, Xiaojuan;
7:1:14:4     Synthesis and dielectric properties of textured SrBi2Nb2O9 ceramics via laser rapid solidification
DOI:10.1016/j.jallcom.2012.01.099  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Zhang, Junji;Chao, Mingju;Liang, Erjun;Li, Mingyu;
7:1:14:5     Structure and electrical properties of SrBi2Nb2O9-based ferroelectric ceramics with lithium and cerium modification
DOI:10.1016/j.jallcom.2013.04.073  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Fang, Pinyang;Xi, Zengzhe;Long, Wei;Li, Xiaojuan;Li, Jin;
7:1:14:6     Effect of cerium additives on structure and electrical properties of Aurivillius oxides (K0.16Na0.84)(0.5)Bi4.5Ti4O15
DOI:10.1016/j.mseb.2014.03.003  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:0  AU: Fang, Pinyang;Liu, Peng;Xi, Zengzhe;Long, Wei;Li, Xiaojuan;
7:1:14:7     Crystallographic Evolution, Dielectric, and Piezoelectric Properties of Bi4Ti3O12:W/Cr Ceramics
DOI:10.1111/j.1551-2916.2009.03582.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:19  AU: Hou, Jungang;Qu, Yuanfang;Vaish, Rahul;Varma, K. B. R.;Krsmanovic, Dalibor;Kumar, R. Vasant;
7:1:14:8     The grain size-dependent electrical properties of Bi4Ti3O12 piezoelectric ceramics
DOI:10.1016/j.jallcom.2012.09.149  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:12  AU: Chen, Huanbei;Shen, Bo;Xu, Jinbao;Zhai, Jiwei;
7:1:14:9     Dielectric properties and impedance analysis in Aurivillius-type (Na0.25K0.25Bi0.5)(1-x)(LiCe)(x/2)[](x/2)Bi4Ti4O15 ceramics
DOI:10.1016/j.jallcom.2012.07.019  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Peng, Zhihang;Chen, Qiang;Wu, Jiagang;Liu, Dan;Xiao, Dinquan;Zhu, Jianguo;
7:1:14:10     Structure and electrical properties of bismuth and sodium modified SrBi2Nb2O9 ferroelectric ceramics
DOI:10.1016/j.jallcom.2012.10.147  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Fang, Pinyang;Fan, Huiqing;Xi, Zengzhe;Chen, Weixing;Chen, Shanchuan;Long, Wei;Li, Xiaojuan;
7:1:14:11     Effect of Sb Substitution on the Structural and Electrical Properties of Bi4Ti3-2xNbxTaxO12 Ceramics
DOI:10.1111/j.1551-2916.2011.04431.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:12  AU: Hou, Jungang;Qu, Yuanfang;Vaish, Rahul;Krsmanovic, Dalibor;Kumar, Ramachandran V.;
7:1:14:12     Correlation between lattice distortion and electrical properties on Bi4Ti3O12 ceramics with W/Ni modifications
DOI:10.1016/j.jallcom.2013.12.096  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Peng, Zhihang;Chen, Yu;Chen, Qiang;Li, Na;Zhao, Xiaohan;Kou, Chuang;Xiao, Dingquan;Zhu, Jianguo;
7:1:14:13     Microstructure and electrical properties of Mn-modified bismuth-layer Na0.25K0.25Bi2.5Nb2O9 Ceramics
DOI:10.1016/j.jallcom.2012.07.135  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Jiang, Xiang-Ping;Wang, Xin-Jia;Wen, Jia-Xin;Chen, Chao;Tu, Na;Li, Xiao-Hong;
7:1:14:14     Crystalline structure, ferroelectric properties, and electrical conduction characteristics of W/Cr co-doped Bi4Ti3O12 ceramics
DOI:10.1016/j.jallcom.2014.05.136  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Chen, Yu;Pen, Zhihang;Wang, Qingyuan;Zhu, Jianguo;
7:1:14:15     Ferroelectric phase transitions in new Aurivillius oxides: Bi2+2xSr1-2xNb2-xScxO9
DOI:10.1039/c1jm11297j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:20  AU: Sivakumar, Thathan;Itoh, Mitsuru;
7:1:14:16     Microstructure and electrical properties in W/Nb co-doped Aurivillius phase Bi4Ti3O12 piezoelectric ceramics
DOI:10.1016/j.materresbull.2014.07.002  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Peng, Zhihang;Chen, Qiang;Chen, Yu;Xiao, Dingquan;Zhu, Jianguo;
7:1:14:17     Structural distortion and dielectric properties of Sr1-x(Na0.5Bi0.5)(x)Bi2Nb2O9 (x=0.0, 0.2, 0.5, 0.8 and 1.0)
DOI:10.1016/j.jallcom.2012.08.101  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:8  AU: Naceur, Hana;Megriche, Adel;El Maaoui, Mohamed;
7:1:14:18     Piezoelectric accelerometers for ultrahigh temperature application
DOI:10.1063/1.3290251  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:22  AU: Zhang, Shujun;Jiang, Xiaoning;Lapsley, Michael;Moses, Paul;Shrout, Thomas R.;
7:1:14:19     Dielectric, pyroelectric and ferroelectric properties of Bi4Ti2.98Nb0.01Ta0.01O12 ceramics
DOI:10.1016/j.matchemphys.2009.12.036  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:8  AU: Hou, Jungang;Vaish, Rahul;Qu, Yuanfang;Krsmanovic, Dalibor;Varma, K. B. R.;Kumar, R. V.;
7:1:14:20     Effect of tungsten doping in bismuth-layered Na0.5Bi2.5Nb2O9 high temperature piezoceramics
DOI:10.1063/1.4861460  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Zhou, Zhiyong;Li, Yuchen;Hui, Shipeng;Dong, Xianlin;
7:1:14:21     Microstructure and Properties of High-Temperature Materials (1-x) Na0.5Bi2.5Nb2O9-xLiNbO(3)
DOI:10.1111/j.1551-2916.2010.04219.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Jiang, Xiang-Ping;Yang, Qing;Zhou, Shu-Lan;Chen, Chao;Chen, Yan;Tu, Na;Yu, Zu-Deng;
7:1:14:22     Impedance analysis of thermally modified SrBi2(Nb0.5Ta0.5)(2)O-9 ceramics
DOI:10.1016/j.jallcom.2011.04.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Kajewski, D.;Ujma, Z.;
7:1:14:23     Relaxation associated with the synergetic oxygen vacancies and electrons in, (Ba1-xBix)(0.9)Sr0.1TiO3-delta ceramics
DOI:10.1063/1.3457232  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Li, Zhuo;Fan, Huiqing;
7:1:14:24     Ferroelectric, dielectric and piezoelectric properties of Sr-0.6(BiNa)(0.2)Bi2Nb2O9 ceramics
DOI:10.1016/j.materresbull.2013.07.021  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:0  AU: Fang, Pinyang;Xi, Zengzhe;Long, Wei;Li, Xiaojuan;
7:1:14:25     Piezoelectric properties enhanced of Sr-0.6(BiNa)(0.2)Bi2Nb2O9 ceramic by (LiCe) modification with charge neutrality
DOI:10.1016/j.mseb.2013.05.007  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:3  AU: Fang, Pinyang;Xi, Zengzhe;Long, Wei;Li, Xiaojuan;Li, Jin;
7:1:14:26     Calcium aluminate silicate Ca2Al2SiO7 single crystal applicable to piezoelectric sensors at high temperature
DOI:10.1063/1.4811163  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Takeda, Hiroaki;Hagiwara, Manabu;Noguchi, Hiroaki;Hoshina, Takuya;Takahashi, Tomoko;Kodama, Nobuhiro;Tsurumi, Takaaki;
7:1:14:27     High temperature ReCOB piezocrystals: Recent developments
DOI:10.1016/j.jcrysgro.2010.11.032  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:9  AU: Zhang, Shujun;Yu, Fapeng;Xia, Ru;Fei, Yiting;Frantz, Eric;Zhao, Xian;Yuan, Durong;Chai, Bruce H. T.;Snyder, David;Shrout, Thomas R.;
7:1:14:28     Textured Ca-0.85(Li,Ce)(0.15)Bi4Ti4O15 ceramics for high temperature piezoelectric applications
DOI:10.1016/j.materresbull.2012.05.009  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:6  AU: Chen, Huanbei;Shen, Bo;Xu, Jinbao;Zhai, Jiwei;
7:1:14:29     Lanthanum induced larger polarization and dielectric relaxation in Aurivillius phase SrBi(2-x)La(x)Nb(2)O(9) ferroelectric ceramics
DOI:10.1063/1.3340981  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Fang, Pinyang;Fan, Huiqing;Li, Jin;Liang, Fujun;
7:1:14:30     Effect of point defects on thermal depoling behavior of bismuth layer-structured ferroelectric ceramics
DOI:10.1063/1.3499627  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Zeng, Tao;Yan, Haixue;Reece, Michael J.;
7:1:14:31     Piezoelectric properties and thermal stabilities of cobalt-modified potassium bismuth titanate
DOI:10.1016/j.matchemphys.2013.03.032  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:2  AU: Guo, Zhen-Lei;Wang, Chun-Ming;Zhao, Tian-Long;Yu, Si-Long;Cao, Zhao-Peng;
7:1:14:32     Effects of (Li,Ce) on the Dielectric, Piezoelectric and Impendence Properties of CaBi4Ti4O15 Piezoceramics
DOI:10.1080/00150193.2013.821897  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Peng, Zhihang;Huang, Fengkang;Chen, Qiang;Bao, Shaoming;Wang, Yadan;Xiao, Dinquan;Zhu, Jianguo;
7:1:14:33     Influence of (Li,Ce) Co-Doped on the Electrical Properties of Na0.5Bi2.5Nb2O9 Piezoceramics
DOI:10.1080/10584587.2012.741496  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Huang, Fengkang;Peng, Zhihang;Chen, Qiang;Bao, Shaoming;Xiao, Dingquan;Zhu, Jianguo;
7:1:14:34     YCa4O(BO3)(3) (YCOB) high temperature vibration sensor
DOI:10.1063/1.3598115  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Kim, Kyungrim;Zhang, Shujun;Huang, Wenbin;Yu, Fapeng;Jiang, Xiaoning;
7:1:14:35     Growth and high temperature properties of Ca3Ta(Al0.9Ga0.1)(3)Si2O14 crystals with ordered langasite structure
DOI:10.1016/j.jcrysgro.2013.12.058  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:0  AU: Xiong, Kainan;Zheng, Yanqing;Tu, Xiaoniu;Zhang, Shujun;Kong, Haikuan;Shi, Erwei;
7:1:14:36     Crystal structure and enhanced electromechanical properties of Aurivillius ferroelectric ceramics, Bi4Ti3-x(Mg1/3Nb2/3)(x)O-12
DOI:10.1016/j.scriptamat.2013.11.025  JN:SCRIPTA MATERIALIA  PY:2014
  TC:3  AU: Long, Changbai;Fan, Huiqing;Li, Mengmeng;Dong, Guangzhi;Li, Qiang;
7:1:14:37     Effects of (Ca,Sb) on the Properties of Na0.5Bi2.5Nb2O9-based Bismuth Layered Structure Ferroelectric Ceramics
DOI:10.1080/00150193.2013.846138  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Chen, Qiang;Peng, Zhi-Hang;Liu, Hong;Zhu, Jian-Guo;Xiao, Ding-Quan;
7:1:14:38     Enhancement of the piezoelectric properties of sodium lanthanum bismuth titanate (Na0.5La0.5Bi4Ti4O15) through modification with cobalt
DOI:10.1016/j.mseb.2010.03.076  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:8  AU: Wang, Chun-Ming;Wang, Jin-Feng;Zheng, Li-Mei;Zhao, Ming-Lei;Wang, Chun-Lei;
7:1:14:39     Investigation on microstructure, dielectric and impedance properties of Sr1-xBi2+(2/3)x(VxTa1-x)(2)O-9 [x=0, 0.1 and 0.2] ceramics
DOI:10.1016/j.jallcom.2009.11.201  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:2  AU: Sridarane, R.;Subramanian, S.;Janani, N.;Murugan, R.;
7:1:14:40     Effects of K nonstoichiometry in bismuth layer-structured K0.5+xBi4.5Ti4O15 ceramics
DOI:10.1016/j.ceramint.2011.05.010  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Lee, T. H.;Sung, Y. S.;Cho, J. H.;Song, T. K.;Kim, M. H.;Park, T. G.;Cho, H. G.;
7:1:14:41     Improved electrical properties of Nd-doped K0.5Bi4.5Ti4O15 thin films prepared by chemical solution deposition
DOI:10.1016/j.ceramint.2013.06.111  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Kim, J. W.;Do, D.;Raghavan, C. M.;Kim, S. S.;
7:1:14:42     Electrical conductivity of SrBi2Ta2O9 ceramics
DOI:10.1016/j.ceramint.2013.04.005  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Kajewski, D.;Ujma, Z.;
7:1:14:43     Study of Effect of Doping on Grain and Grain Boundary Parameters of Sr1-2xNaxNdxBi4Ti4O15 (x=0-0.5) Ceramics Using Impedance Spectroscopy
DOI:10.1080/00150193.2014.932611  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Rizwana;Sarah, P.;
7:1:14:44     Structural, dielectric and ferroelectric properties of four-layer Aurivillius phase Na0.5La0.5Bi4Ti4O15
DOI:10.1016/j.mseb.2010.05.008  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:4  AU: Kumar, Sunil;Varma, K. B. R.;
7:1:14:45     Effects of Mn and Pr Co-doped on Microstructural and Electrical Properties of CaBi2Nb2O9 Piezoceramics
DOI:10.1080/00150193.2013.850970  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Bao, Shaoming;Peng, Zhihang;Guang, Wenyan;Li, Chunyan;Chen, Qiang;Zhang, Wen;Xiao, Dingquan;Zhu, Jianguo;
7:1:14:46     Anisotropic properties and crystal structure of ferroelectric Na0.5Bi4.5Ti4O15
DOI:10.1016/j.jallcom.2010.07.022  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:3  AU: Li, Zhengfa;Chan, H. L. W.;Li, Yongxiang;Kwok, K. W.;Choy, S. H.;
7:1:14:47     Investigations on the thermal and piezoelectric properties of fresnoite Ba2TiSi2O8 single crystals
DOI:10.1063/1.4891827  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Shen, Chuanying;Zhang, Huaijin;Cong, Hengjiang;Yu, Haohai;Wang, Jiyang;Zhang, Shujun;
7:1:14:48     Piezoelectric shear-mode properties of Pb(Yb1/2Nb1/2)O-3-PbTiO3 ceramics
DOI:10.1016/j.matlet.2010.01.069  JN:MATERIALS LETTERS  PY:2010
  TC:2  AU: Lim, Jong Bong;Zhang, Shujun;Shrout, Thomas R.;
7:1:14:49     A-site substitution effect of strontium on bismuth layered CaBi4Ti4O15 ceramics on electrical and piezoelectric properties
DOI:10.1016/j.matchemphys.2011.05.081  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:3  AU: Tanwar, Amit;Verma, Maya;Gupta, Vinay;Sreenivas, K.;
7:1:14:50     Effects of processing parameters on laser cutting of aluminium-copper alloys using off-axial supersonic nozzles
DOI:10.1016/j.apsusc.2010.11.061  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:11  AU: Riveiro, A.;Quintero, F.;Lusquinos, F.;Comesana, R.;Pou, J.;
7:1:14:51     The Effects of Na/K Ratio on the Electrical Properties of Sodium-Potassium Bismuth Titanate Na0.5Bi4.5Ti4O15-K0.5Bi4.5Ti4O15
DOI:10.1111/j.1551-2916.2011.04946.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Zhao, Tian-Long;Guo, Zhen-Lei;Wang, Chun-Ming;
7:1:14:52     Domain structures in hot-press sintered SrBi2Ta1.6Nb0.4O9 and SrBi2Ta2O9 ferroelectric ceramics
DOI:10.1016/j.ceramint.2012.01.050  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Wang, Wen;Rao, Jiancun;Ke, Hua;Meng, Xianghe;Jia, Dechang;Zhou, Yu;
7:1:14:53     Microstructures, dielectric, and piezoelectric properties of W/Cr co-doped Bi4Ti3O12 ceramics
DOI:10.1063/1.4893366  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chen, Yu;Liang, Dayun;Wang, Qingyuan;Zhu, Jianguo;
7:1:15:1     Finite-Temperature Properties of Ba(Zr, Ti)O-3 Relaxors from First Principles
DOI:10.1103/PhysRevLett.108.257601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:32  AU: Akbarzadeh, A. R.;Prosandeev, S.;Walter, Eric J.;Al-Barakaty, A.;Bellaiche, L.;
7:1:15:2     Properties of Epitaxial Films Made of Relaxor Ferroelectrics
DOI:10.1103/PhysRevLett.111.247602  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Prosandeev, S.;Wang, Dawei;Bellaiche, L.;
7:1:15:3     Synthesis, optical and ferroelectric properties of PZT thin films: experimental and theoretical investigation
DOI:10.1039/c2jm15150b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:8  AU: Pontes, D. S. L.;Gracia, L.;Pontes, F. M.;Beltran, A.;Andres, J.;Longo, E.;
7:1:15:4     Field-Induced Percolation of Polar Nanoregions in Relaxor Ferroelectrics
DOI:10.1103/PhysRevLett.110.207601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:9  AU: Prosandeev, S.;Wang, Dawei;Akbarzadeh, A. R.;Dkhil, B.;Bellaiche, L.;
7:1:15:5     Random local strain effects in homovalent-substituted relaxor ferroelectrics: A first-principles study of BaTi0.74Zr0.26O3
DOI:10.1103/PhysRevB.82.132102  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Laulhe, C.;Pasturel, A.;Hippert, F.;Kreisel, J.;
7:1:15:6     Broadband dielectric response of Ba(Zr,Ti)O-3 ceramics: From incipient via relaxor and diffuse up to classical ferroelectric behavior
DOI:10.1103/PhysRevB.86.014106  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Nuzhnyy, D.;Petzelt, J.;Savinov, M.;Ostapchuk, T.;Bovtun, V.;Kempa, M.;Hlinka, J.;Buscaglia, V.;Buscaglia, M. T.;Nanni, P.;
7:1:15:7     Electric-field dependent freezing in relaxor ferroelectrics
DOI:10.1103/PhysRevB.89.184110  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Pirc, R.;Kutnjak, Z.;
7:1:15:8     High-Resolution Calorimetric Study of Pb(Mg1/3Nb2/3)O-3 Single Crystal
DOI:10.1103/PhysRevLett.109.037601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:17  AU: Novak, Nikola;Pirc, Rasa;Wencka, Magdalena;Kutnjak, Zdravko;
7:1:15:9     Ferroelectric-relaxor crossover in Ba(Ti1-xZrx)O-3 studied using neutron total scattering measurements and reverse Monte Carlo modeling
DOI:10.1103/PhysRevB.81.214119  JN:PHYSICAL REVIEW B  PY:2010
  TC:22  AU: Jeong, I. -K.;Park, C. Y.;Ahn, J. S.;Park, S.;Kim, D. J.;
7:1:15:10     Local structure of Ba(Ti,Zr)O-3 perovskite-like solid solutions and its relation to the band-gap behavior
DOI:10.1103/PhysRevB.83.094122  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Levin, Igor;Cockayne, Eric;Krayzman, Victor;Woicik, Joseph C.;Lee, Soonil;Randall, Clive A.;
7:1:15:11     Pressure dependence of the phonon spectrum in BaTiO3 polytypes studied by ab initio calculations
DOI:10.1103/PhysRevB.88.014114  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Seo, Yu-Seong;Ahn, Jai Seok;
7:1:15:12     The atomic structure of lead-free Ba(Zr0.2Ti0.8)O-3-(Ba0.7Ca0.3)TiO3 by using neutron total scattering analysis
DOI:10.1063/1.4770297  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Jeong, I. -K.;Ahn, J. S.;
7:1:15:13     Magnetic control of relaxor features in BaZr0.5Ti0.5O3 and CoFe2O4 composite
DOI:10.1063/1.4795726  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Usman, Muhammad;Mumtaz, Arif;Raoof, Sobia;Hasanain, S. K.;
7:1:15:14     Crossover from ferroelectric to relaxor and cluster glass in BaTi1-xZrxO3 (x=0.25-0.35) studied by non-linear permittivity
DOI:10.1063/1.4811089  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:12  AU: Kleemann, W.;Miga, S.;Dec, J.;Zhai, J.;
7:1:15:15     High-temperature dielectric response of (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3): Does Burns temperature exist in ferroelectric relaxors?
DOI:10.1063/1.3388304  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:15  AU: Bobnar, V.;Filipic, C.;Levstik, A.;Kutnjak, Z.;
7:1:15:16     Evaluation of Experimental Resume of BaZrxTi1-xO3 with Perspective to Ferroelectric Relaxor Family: An Overview
DOI:10.1080/00150193.2011.644168  JN:FERROELECTRICS  PY:2011
  TC:19  AU: Maiti, Tanmoy;Guo, R.;Bhalla, A. S.;
7:1:15:17     Hybrid density functional theory LCAO calculations on phonons in Ba(Ti,Zr,Hf)O-3
DOI:10.1103/PhysRevB.83.014105  JN:PHYSICAL REVIEW B  PY:2011
  TC:19  AU: Evarestov, Robert A.;
7:1:15:18     Order parameter and scaling behavior in BaZrxTi1-xO3 (0.3 < x < 0.6) relaxor ferroelectrics
DOI:10.1063/1.4860967  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Usman, Muhammad;Mumtaz, Arif;Raoof, Sobia;Hasanain, S. K.;
7:1:15:19     Broadband Dielectric Spectroscopy of Ba(Zr,Ti)O-3: Dynamics of Relaxors and Diffuse Ferroelectrics
DOI:10.1080/00150193.2014.948343  JN:FERROELECTRICS  PY:2014
  TC:4  AU: Petzelt, J.;Nuzhnyy, D.;Savinov, M.;Bovtun, V.;Kempa, M.;Ostapchuk, T.;Hlinka, J.;Canu, G.;Buscaglia, V.;
7:1:15:20     Non-linear permittivity study of the crossover from ferroelectric to relaxor and cluster glass in BaTi1-xSnxO3 (x=0.175-0.30)
DOI:10.1063/1.4875595  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Kleemann, W.;Miga, S.;Xu, Z. K.;Lu, S. G.;Dec, J.;
7:1:15:21     Magnetic field dependence of piezoelectric resonance frequency in CoFe2O4-BaTiO3 composites
DOI:10.1016/j.jmmm.2012.03.002  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:8  AU: Kagomiya, Isao;Hayashi, Yusuke;Kakimoto, Ken-ichi;Kobayashi, Kazuyoshi;
7:1:15:22     Compressible spherical dipolar glass model of relaxor ferroelectrics
DOI:10.1063/1.4769453  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Pirc, R.;Kutnjak, Z.;Novak, N.;
7:1:15:23     BZT: A Soft Pseudospin Glass
DOI:10.1103/PhysRevLett.111.227601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:7  AU: Sherrington, David;
7:1:15:24     Dielectric properties of PMT-PT crystals
DOI:10.1063/1.4894715  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Palaimiene, E.;Macutkevic, J.;Banys, J.;Kania, A.;
7:1:15:25     Pb(Mg1/3Nb2/3)O-3: A minimal induced-moment soft pseudospin glass perspective
DOI:10.1103/PhysRevB.89.064105  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Sherrington, David;
7:1:15:26     Response to "Comment on 'Order parameter and scaling behavior in BaZrxTi1-xO3 (0.3 < x < 0.6) relaxor ferroelectrics'" [Appl. Phys. Lett. 104, 156102 (2014)]
DOI:10.1063/1.4871415  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Usman, Muhammad;Mumtaz, Arif;Raoof, Sobia;Hasanain, S. K.;
7:1:15:27     Properties of epitaxial (110) BaTiO3 films from first principles
DOI:10.1103/PhysRevB.84.214112  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Gui, Zhigang;Prosandeev, S.;Bellaiche, L.;
7:1:15:28     Kinetics of nucleation of the ferroelectric transitions in PbMg1/3Nb2/3O3 and PbMg1/3Nb2/3O3-12%PbTiO3
DOI:10.1103/PhysRevB.90.024205  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Colla, Eugene V.;Jeliazkov, Jeliazko R.;Weissman, M. B.;Viehland, D. D.;Ye, Zuo-Gang;
7:1:15:29     Comment on "Order parameter and scaling behavior in BaZrxTi1-xO3 (0.3 < x < 0.6) relaxor ferroelectrics" [Appl. Phys. Lett. 103, 262905 (2013)]
DOI:10.1063/1.4871414  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Macutkevic, J.;Banys, J.;
7:1:15:30     Comment on "High-temperature dielectric response of (1-x)PbMg1/3Nb2/3O3-(x)PbTiO3: Does Burns temperature exist in ferroelectric relaxors?" [J. Appl. Phys. 107, 084104 (2010)]
DOI:10.1063/1.3488877  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Scott, J. F.;
7:1:15:31     Magnetic Field Induced Dielectric and Ferroelectric Behaviors in Pb(Zr0.5Ti0.5)O-3/CoFe2O4 0-3 Thick Composite Films
DOI:10.1080/00150193.2010.492668  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Bai, Wei;Meng, Xiangjian;Lin, Tie;Zhu, Xia;Tian, Li;Sun, Jinglan;Chu, Junhao;
7:1:15:32     Response to "Comment on 'High-temperature dielectric response of (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3): Does Burns temperature exist in ferroelectric relaxors?'" [J. Appl. Phys. 107, 084104 (2010)]
DOI:10.1063/1.3488878  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:0  AU: Bobnar, V.;Filipic, C.;Levstik, A.;Kutnjak, Z.;
7:1:15:33     Field-Induced Phase Transitions in Relaxor Ferroelectrics
DOI:10.1080/00150193.2010.505879  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Schmidt, V. Hugo;Chien, R. R.;Tu, Chi-Shun;
7:1:15:34     Kinetics and thermodynamics of the ferroelectric transitions in PbMg1/3Nb2/3O3 and PbMg1/3Nb2/3O3-12% PbTiO3 crystals
DOI:10.1063/1.4804069  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Colla, Eugene V.;Jurik, Nathan;Liu, Yehan;Delgado, M. E. X.;Weissman, M. B.;Viehland, D. D.;Ye, Z. -G.;
7:1:15:35     "The atomic structure of lead-free Ba(Zr0.2Ti0.8)O-3-(Ba0.7Ca0.3)TiO3 by using neutron total scattering analysis" (vol 101, 242901, 2012)
DOI:10.1063/1.4802879  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Jeong, I. -K.;Ahn, J. S.;
7:1:15:36     Direct Observation of the Polar State in the Relaxor Ba(Ti1-xZrx)O-3 by Transmission Electron Microscopy
DOI:10.1080/00150193.2014.874888  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Tsukasaki, H.;Inoue, Y.;Koyama, Y.;
7:1:15:37     Epitaxial Spinel Cobalt Ferrite Films Prepared by Two-Step Spin-Coating Method
DOI:10.1080/00150193.2013.843928  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Meng, Siqin;Yue, Zhenxing;Li, Longtu;
7:1:16:1     Enhanced ferroelectric properties in Mn-doped K0.5Na0.5NbO3 thin films derived from chemical solution deposition
DOI:10.1063/1.3479530  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:25  AU: Wang, Lingyan;Ren, Wei;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:1:16:2     Electrical properties of K0.5Na0.5NbO3 thin films grown on Nb:SrTiO3 single-crystalline substrates with different crystallographic orientations
DOI:10.1063/1.4773542  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:11  AU: Yu, Qi;Li, Jing-Feng;Sun, Wei;Zhou, Zhen;Xu, Ying;Xie, Zhen-Kun;Lai, Feng-Ping;Wang, Qing-Ming;
7:1:16:3     Lead-free (K, Na)NbO3 ferroelectric thin films: Preparation, structure and electrical properties
DOI:10.1016/j.jallcom.2010.08.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:21  AU: Yan, Xin;Ren, Wei;Wu, Xiaoqing;Shi, Peng;Yao, Xi;
7:1:16:4     Effect of Pyrolysis Temperature on Sol-Gel Synthesis of Lead-free Piezoelectric (K,Na)NbO3 Films on Nb:SrTiO3 Substrates
DOI:10.1111/jace.12675  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Yu, Qi;Li, Jing-Feng;Chen, Yanna;Cheng, Li-Qian;Sun, Wei;Zhou, Zhen;Wang, Zhanjie;
7:1:16:5     Fundamental Issues in the Synthesis of Ferroelectric Na0.5K0.5NbO3 Thin Films by Sol-Gel Processing
DOI:10.1021/cm903697j  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:18  AU: Chowdhury, Anirban;Bould, Jonathan;Londesborough, Michael G. S.;Milne, Steven J.;
7:1:16:6     Effect of substrate on microstructure and mechanical properties of sol-gel prepared (K, Na)NbO3 thin films
DOI:10.1016/j.mseb.2012.12.003  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:4  AU: Brunckova, H.;Medvecky, L.;Hvizdos, P.;
7:1:16:7     Effect of deposition temperature on structural, mechanical, optical and dielectric properties of radio frequency sputtered nanocrystalline (KxNa1-x)NbO3 thin films
DOI:10.1016/j.tsf.2014.04.007  JN:THIN SOLID FILMS  PY:2014
  TC:3  AU: Mahesh, P.;Pamu, D.;
7:1:16:8     Effect of Pyrolysis Temperature on K(0.5)Na(0.5)NbO(3) Thick Films Derived from Polyvinylpyrrolidone-Modified Chemical Solution
DOI:10.1111/j.1551-2916.2010.03965.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:17  AU: Wang, Lingyan;Ren, Wei;Yao, Kui;Goh, Phoi Chin;Shi, Peng;Wu, Xiaoqing;Yao, Xi;
7:1:16:9     Leakage current behavior in lead-free ferroelectric (K, Na)NbO3-LiTaO3-LiSbO3 thin films
DOI:10.1063/1.3531575  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Abazari, M.;Safari, A.;
7:1:16:10     Ferroelectric, piezoelectric, and leakage current properties of (K0.48Na0.48Li0.04)(Nb0.775Ta0.225)O-3 thin films grown by pulsed laser deposition
DOI:10.1063/1.3535608  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Wang, D. Y.;Lin, D. M.;Kwok, K. W.;Chan, N. Y.;Dai, J. Y.;Li, S.;Chan, H. L. W.;
7:1:16:11     Orientation-dependent piezoelectricity and domain characteristics of tetragonal Pb(Zr-0.3,Ti-0.7)(0.98)Nb0.02O3 thin films on Nb-doped SrTiO3 substrates
DOI:10.1063/1.4861469  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Yu, Qi;Li, Jing-Feng;Sun, Wei;Zhu, Fang-Yuan;Liu, Yuanming;Chen, Yanna;Wang, Zhanjie;Li, Jiangyu;
7:1:16:12     Shift of morphotropic phase boundary in high-performance [111]-oriented epitaxial Pb (Zr, Ti)O-3 thin films
DOI:10.1063/1.4731214  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Yu, Qi;Li, Jing-Feng;Zhu, Zhi-Xiang;Xu, Ying;Wang, Qing-Ming;
7:1:16:13     Strained ferroelectric NaNbO3 thin films: Impact of pulsed laser deposition growth conditions on structural properties
DOI:10.1016/j.tsf.2014.09.016  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Sellmann, Jan;Schwarzkopf, Jutta;Kwasniewski, Albert;Schmidbauer, Martin;Braun, Dorothee;Duk, Andreas;
7:1:16:14     Effect of deposition temperature on orientation and electrical properties of (K0.5Na0.5)NbO3 thin films by pulsed laser deposition
DOI:10.1016/j.apsusc.2011.10.116  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:13  AU: Tian, Aifen;Ren, Wei;Wang, Lingyan;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:1:16:15     Cobalt doping effects on structures and electrical properties of lead-free ferroelectric K0.5Na0.5NbO3 films
DOI:10.1016/j.jallcom.2014.04.118  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Wang, Lingyan;Ren, Wei;Shi, Peng;Wu, Xiaoqing;
7:1:16:16     Enhanced piezoelectric properties of Ta substituted-(K0.5Na0.5)NbO3 films: A candidate for lead-free piezoelectric thin films
DOI:10.1016/j.jallcom.2011.03.031  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:12  AU: Lee, Sun Young;Ahn, Chang Won;Kim, Jin Soo;Ullah, Aman;Lee, Hai Joon;Hwang, Hak-In;Choi, Jin Sik;Park, Bae Ho;Kim, Ill Won;
7:1:16:17     Preparation and characterization of sol-gel derived (Li,Ta,Sb) modified (K,Na)NbO3 lead-free ferroelectric thin films
DOI:10.1016/j.matchemphys.2011.06.022  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:5  AU: Wang, Li;Zuo, Ruzhong;Liu, Longdong;Su, Hailin;Shi, Min;Chu, Xiangcheng;Wang, Xiaohui;Li, Longtu;
7:1:16:18     Pulsed laser deposition of single-phase lead-free NKLNST thin films with K- and Na-excess targets
DOI:10.1016/j.jallcom.2013.03.049  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Zhu, Mingmin;Shang, Xunzhong;Chang, Gang;Li, Mingkai;Liu, Xiong;Zhou, Taosheng;He, Yunbin;
7:1:16:19     Lithium diffusion in (Li, K, Na)NbO3 piezoeletric thin films and the resulting approach for enhanced performance properties
DOI:10.1063/1.3631761  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Goh, Phoi Chin;Yao, Kui;Chen, Zhong;
7:1:16:20     Determination of crystallographic orientation of lead-free piezoelectric (K,Na)NbO3 epitaxial thin films grown on SrTiO3 (100) surfaces
DOI:10.1063/1.4868431  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yu, Qi;Zhu, Fang-Yuan;Cheng, Li-Qian;Wang, Ke;Li, Jing-Feng;
7:1:16:21     Effect of different calcination temperatures and post annealing on the properties of 1,3 propanediol based Sol-Gel (Na0.5K0.5) NbO3 (NKN) thin films
DOI:10.1016/j.jallcom.2012.08.099  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Wiegand, Sebastian;Flege, Stefan;Baake, Olaf;Ensinger, Wolfgang;
7:1:16:22     Linear Thermal Expansion of Lead-Free Piezoelectric K0.5Na0.5NbO3 Ceramics in a Wide Temperature Range
DOI:10.1111/j.1551-2916.2011.04628.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Malic, Barbara;Razpotnik, Helena;Koruza, Jurij;Kokalj, Samo;Cilensek, Jena;Kosec, Marija;
7:1:16:23     Lead-Free Ferroelectric Potassium Sodium Niobate Thin Films from Solution: Composition and Structure
DOI:10.1111/j.1551-2916.2011.04892.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:14  AU: Kupec, Alja;Malic, Barbara;Tellier, Jenny;Tchernychova, Elena;Glinsek, Sebastjan;Kosec, Marija;
7:1:16:24     Effect of A-site Excess on the Piezoelectric Properties of ( K-0.48 N-a0.52)(1+x)(Nb0.55Ta0.45) O-3 Thin Films
DOI:10.1080/00150193.2014.893808  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Park, J. S.;Do, D.;Lee, M. H.;Kim, D. J.;Kim, M. -H.;Kim, J. S.;Kambale, R.;Kim, S. W.;Kim, W. -J.;Kim, S. S.;Jang, K. W.;Hwang, I. R.;Park, B. H.;Song, T. K.;
7:1:16:25     A comparative study of fibre-textured and epitaxial Nb-doped Pb(Zr0.53Ti0.47)O-3 thin films on different substrates
DOI:10.1016/j.apsusc.2010.01.044  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:10  AU: Zhu, Zhi-Xiang;Li, Jing-Feng;
7:1:16:26     Structural and dielectric properties of the lead-free (1-x)K0.5Na0.5NbO3-xSrTiO(3) thin films from solutions
DOI:10.1016/j.jallcom.2014.01.193  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Kupec, Alja;Malic, Barbara;
7:1:16:27     Structures, electrical properties, and leakage current behaviors of un-doped and Mn-doped lead-free ferroelectric K0.5Na0.5NbO3 films
DOI:10.1063/1.4861415  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Wang, Lingyan;Ren, Wei;Shi, Peng;Wu, Xiaoqing;
7:1:16:28     Structures and electrical properties of Mn- and Co-doped lead-free ferroelectric K0.5Na0.5NbO3 films prepared by a chemical solution deposition method
DOI:10.1016/j.tsf.2013.04.045  JN:THIN SOLID FILMS  PY:2013
  TC:4  AU: Wang, Lingyan;Ren, Wei;Phoi Chin Goh;Yao, Kui;Shi, Peng;Wu, Xiaoqing;Yao, Xi;
7:1:16:29     Phase transitional behavior of potassium sodium niobate thin films
DOI:10.1016/j.tsf.2013.05.098  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Kupec, Alja;Gemeiner, Pascale;Dkhil, Brahim;Malic, Barbara;
7:1:16:30     Effects of deposition temperature on structure and properties of (K0.48Na0.52)NbO3 ferroelectric thin films by pulsed laser deposition
DOI:10.1063/1.4823852  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Tian, Aifen;Ren, Wei;Wang, Lingyan;Du, Huiling;Yao, Xi;
7:1:16:31     Influence of Oxygen Pressure on Structures and Electrical Properties of Lead-free (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3 Thin Films Deposited by Pulsed Laser Deposition
DOI:10.1080/10584587.2012.735890  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Tian, Aifen;Ren, Wei;Shi, Peng;Wu, Xiaoqing;Chen, Xiaofeng;
7:1:16:32     Effects of thickness on structures and electrical properties of Mn-doped K0.5Na0.5NbO3 films
DOI:10.1016/j.jallcom.2013.08.094  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Wang, Lingyan;Ren, Wei;Shi, Peng;Wu, Xiaoqing;Yao, Xi;
7:1:16:33     Enhanced ferroelectric properties in Bi-doped K0.5Na0.5NbO3 thin films prepared by pulsed laser deposition
DOI:10.1016/j.mseb.2013.08.010  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Tian, Aifen;Ren, Wei;Wang, Lingyan;Du, Huiling;Yao, Xi;
7:1:16:34     Processing of highly oriented (K,Na)NbO3 thin films using a tailored metal-alkoxide precursor solution
DOI:10.1016/j.jeurceramsoc.2011.04.031  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Nakashima, Yoshifumi;Sakamoto, Wataru;Yogo, Toshinobu;
7:1:16:35     Effects of thickness on structures and electrical properties of K0.5Na0.5NbO3 thick films derived from polyvinylpyrrolidone-modified chemical solution
DOI:10.1016/j.ceramint.2011.04.104  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Wang, Lingyan;Ren, Wei;Yao, Kui;Shi, Peng;Wu, Xiaoqing;Yao, Xi;
7:1:16:36     Effects of oxygen ambient on dielectric and ferroelectric properties of lead free Li-x(K0.5Na0.5)((1-x))NbO3 thin films derived from chemical solution deposition
DOI:10.1016/j.jallcom.2012.12.015  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Ye, Peng;Liu, Guolei;He, Shumin;Cao, Mu;Kang, Shishou;Chen, Yanxue;Yan, Shishen;Mei, Liangmo;
7:1:16:37     Properties of (K,Na)NbO3-based lead-free piezoelectric films prepared by pulsed laser deposition
DOI:10.1016/j.tsf.2010.06.016  JN:THIN SOLID FILMS  PY:2010
  TC:5  AU: Chua, Ngeah Theng;You, Lu;Ma, Jan;Wang, Junling;
7:1:16:38     Ferroelectric (K0.44Na0.52 Li0.04)(Nb0.86Ta0.10Sb0.04)O3 Thin Films Prepared by Pulsed Laser Deposition
DOI:10.1080/00150193.2010.484337  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Tian, Aifen;Ren, Wei;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:1:16:39     Impedance spectroscopy and relaxation phenomena of (Na,K) excess Na0 5K0 5NbO3 thin films grown by chemical solution deposition
DOI:10.1016/j.tsf.2010.08.133  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Lee, Sun Young;Kim, Jin Soo;Ahn, Chang Won;Hwang, Hak In;Kim, Ill Won;
7:1:16:40     Evidence of phase heterogeneity in sol-gel Na0.5K0.5NbO3 system
DOI:10.1016/j.matchemphys.2010.06.009  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:7  AU: Chowdhury, Anirban;Bould, Jonathan;Londesborough, Michael G. S.;Vecernikova, Eva;Milne, Steven J.;
7:1:16:41     Analysis of continuous stiffness data measured during nanoindentation of titanium films on glass substrate
DOI:10.1016/j.matchemphys.2010.10.026  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:3  AU: Wen, Tao;Gong, Jianghong;Peng, Zhijian;Jiang, Danyu;Wang, Chengbiao;Fu, Zhiqiang;Miao, Hezhuo;
7:1:16:42     Effects of excess amount of K and Na on properties of (K0.48Na0.52)NbO3 thin films
DOI:10.1016/j.ceramint.2011.04.101  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Li, Gang;Wu, Xiao-Qing;Ren, Wei;Shi, Peng;Chen, Xiao-Feng;Yao, Xi;
7:1:16:43     Effect of Amount of Polyvinylpyrrolidone Introduced in Solution-Derived Ferroelectric K0.5Na0.5NbO3 Thick Films
DOI:10.1080/00150193.2010.482500  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Wang, Lingyan;Yao, Kui;Ren, Wei;
7:1:16:44     Composition-phase structure relationship and thickness-dependent ferroelectricity of rhombohedral phase in [1 1 1]-textured Nb-doped Pb(Zr,Ti)O-3 thin films
DOI:10.1016/j.apsusc.2012.11.006  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: Yu, Qi;Li, Jing-Feng;Sun, Wei;
7:1:16:45     Piezoelectric Properties of Lead-free Piezoelectric Ceramics and Their Energy Harvester Characteristics
DOI:10.1111/jace.12227  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Seo, In-Tae;Choi, Chang-Hoi;Song, Daniel;Jang, Min-Soo;Kim, Bo-Yun;Nahm, Sahn;Kim, Young-Sik;Sung, Tae-Hyun;Song, Hyun-Cheol;
7:1:16:46     A study on the stability of a PZT precursor solution based on the time evolution of mean particles size and pH
DOI:10.1016/j.matchemphys.2010.04.017  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:3  AU: Suarez-Gomez, A.;Saniger-Blesa, J. M.;Calderon-Pinar, F.;
7:1:17:1     Interband electronic transitions and phase transformation of multiferroic Bi1-xLaxFe1-yTiyO3 ceramics revealed by temperature-dependent spectroscopic ellipsometry
DOI:10.1063/1.4851795  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Xu, L. P.;Zhang, L. L.;Jiang, P. P.;Yu, J.;Duan, Z. H.;Hu, Z. G.;Zhu, Z. Q.;Chu, J. H.;
7:1:17:2     Temperature-dependent dielectric functions and interband critical points of relaxor lead hafnate-modified PbSc1/2Ta1/2O3 ferroelectric ceramics by spectroscopic ellipsometry
DOI:10.1063/1.4802205  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Duan, Z. H.;Hu, Z. G.;Jiang, K.;Li, Y. W.;Wang, G. S.;Dong, X. L.;Chu, J. H.;
7:1:17:3     A phenomenological model of electronic band structure in ferroelectric Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals around the morphotropic phase boundary determined by temperature-dependent transmittance spectra
DOI:10.1016/j.actamat.2011.07.025  JN:ACTA MATERIALIA  PY:2011
  TC:8  AU: Zhu, J. J.;Li, W. W.;Xu, G. S.;Jiang, K.;Hu, Z. G.;Chu, J. H.;
7:1:17:4     Abnormal electronic transition variations of lanthanum-modified lead zironate stannate titanate ceramics near morphotropic phase boundary: A spectroscopic evidence
DOI:10.1063/1.4733683  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Chen, X.;Jiang, K.;Hu, Z. G.;Chen, X. F.;Wang, G. S.;Dong, X. L.;Chu, J. H.;
7:1:17:5     Abnormal temperature dependence of interband electronic transitions in relaxor-based ferroelectric (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (x=0.24 and 0.31) single crystals
DOI:10.1063/1.3560342  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Zhu, J. J.;Li, W. W.;Xu, G. S.;Jiang, K.;Hu, Z. G.;Zhu, M.;Chu, J. H.;
7:1:17:6     Temperature-dependent Raman scattering and multiple phase coexistence in relaxor ferroelectric Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1063/1.4825322  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Zhu, J. J.;Jiang, K.;Xu, G. S.;Hu, Z. G.;Li, Y. W.;Zhu, Z. Q.;Chu, J. H.;
7:1:17:7     Electronic band structures, dielectric functions and interband transitions of relaxor ferroelectric (1-x) Pb (Sc1/2Ta1/2) O-3-xPbHfO(3) ceramics: A spectroscopic reflectance study
DOI:10.1016/j.actamat.2012.07.061  JN:ACTA MATERIALIA  PY:2012
  TC:3  AU: Zhang, W. J.;Duan, Z. H.;Jiang, K.;Hu, Z. G.;Wang, G. S.;Dong, X. L.;Chu, J. H.;
7:1:17:8     Effects from A-site substitution on morphotropic phase boundary and phonon modes of (Pb1-1.5xLax)(Zr0.42Sn0.40T0.18)O-3 ceramics by temperature dependent Raman spectroscopy
DOI:10.1063/1.4816093  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Chen, X.;Hu, Z. G.;Duan, Z. H.;Chen, X. F.;Wang, G. S.;Dong, X. L.;Chu, J. H.;
7:1:17:9     Optical bandgap and phase transition in relaxor ferroelectric Pb(Mg1/3Nb2/3) O-3-xPbTiO(3) single crystals: An inherent relationship
DOI:10.1063/1.4816965  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Zhang, X. L.;Hu, Z. G.;Xu, G. S.;Zhu, J. J.;Li, Y. W.;Zhu, Z. Q.;Chu, J. H.;
7:1:17:10     Dielectric function spectra at 40 K and critical-point energies for CuIn0.7Ga0.3Se2
DOI:10.1063/1.4773362  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Choi, S. G.;Chen, R.;Persson, C.;Kim, T. J.;Hwang, S. Y.;Kim, Y. D.;Mansfield, L. M.;
7:1:17:11     The A-site driven phase transition procedure of (Pb0.97La0.02)(Zr0.42Sn0.40Ti0.18)O-3 ceramics: An evidence from electronic structure variation
DOI:10.1063/1.4829757  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Chen, X.;Jiang, P. P.;Duan, Z. H.;Hu, Z. G.;Chen, X. F.;Wang, G. S.;Dong, X. L.;Chu, J. H.;
7:1:17:12     Electronic transitions and dielectric functions of relaxor ferroelectric Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals: Temperature dependent spectroscopic study
DOI:10.1063/1.4870426  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhu, J. J.;Zhang, J. Z.;Xu, G. S.;Zhang, X. L.;Hu, Z. G.;Chu, J. H.;
7:1:17:13     Large electric-induced pyroelectric properties in (Pb0.87La0.02Ba0.1) (Zr0.7Sn0.24Ti0.06)O-3 antiferroelectric ceramics with excess PbO
DOI:10.1063/1.3596577  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Zhang, Qingfeng;Jiang, Shenglin;Zeng, Yike;Fan, Maoyan;Zhang, Guangzu;Zhang, Yangyang;Yu, Yan;Wang, Jing;He, Jungang;
7:1:17:14     Optical interband transitions in relaxor-based ferroelectric 0.93Pb(Zn1/3Nb2/3)O-3-0.07PbTiO(3) single crystal
DOI:10.1063/1.3446293  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:18  AU: Sun, Enwei;Zhang, Rui;Wang, Zhu;Xu, Dapeng;Li, Liang;Cao, Wenwu;
7:1:17:15     Phonon mode and phase transition behaviors of (1-x)PbSc1/2Ta1/2O3-xPbHfO(3) relaxor ferroelectric ceramics determined by temperature-dependent Raman spectra
DOI:10.1063/1.3614431  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Zhang, W. J.;Li, W. W.;Chen, X. G.;Hu, Z. G.;Liu, W.;Wang, G. S.;Dong, X. L.;Chu, J. H.;
7:1:17:16     The Effect of Excess PbO on Dielectric and Pyroelectric Properties of Lead Scandium Tantalate Ceramics
DOI:10.1111/j.1551-2916.2010.03767.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Liu, Wei;Wang, Genshui;Cao, Sheng;Mao, Chaoliang;Cao, Fei;Dong, Xianlin;
7:1:17:17     Temperature dependent near infrared ultraviolet range dielectric functions of nanocrystalline (Na0.5Bi0.5)(1-x)Ce-x(Ti0.99Fe0.01)O-3 films
DOI:10.1063/1.4863417  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zhang, S.;Zhang, J. Z.;Han, M. J.;Li, Y. W.;Hu, Z. G.;Chu, J. H.;
7:1:17:18     Intrinsic relationship between electronic structures and phase transition of SrBi2-xNdxNb2O9 ceramics from ultraviolet ellipsometry at elevated temperatures
DOI:10.1063/1.4864715  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Duan, Z. H.;Jiang, K.;Xu, L. P.;Li, Y. W.;Hu, Z. G.;Chu, J. H.;
7:1:17:19     Microstructure and electrical properties of (Pb0.87Ba0.1La0.02)(Zr0.68Sn0.24Ti0.08)O-3 anti-ferroelectric ceramics fabricated by the hot-press sintering method
DOI:10.1016/j.jeurceramsoc.2012.08.011  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Zhang, Guangzu;Liu, Sisi;Yu, Yan;Zeng, Yike;Zhang, Yangyang;Hu, Xu;Jiang, Shenglin;
7:1:17:20     Phase diagram and incommensurate antiferroelectric structure in (Pb1-1.5xLax)(Zr0.42Sn0.40Ti0.18)O-3 ceramics discovered by band-to-band optical transitions
DOI:10.1063/1.4897357  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ding, X. J.;Xu, L. P.;Hu, Z. G.;Chen, X. F.;Wang, G. S.;Dong, X. L.;Chu, J. H.;
7:1:17:21     High temperature phase transitions and critical exponents of Samarium orthoferrite determined by in situ optical ellipsometry
DOI:10.1063/1.3692088  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Berini, B.;Fouchet, A.;Popova, E.;Scola, J.;Dumont, Y.;Franco, N.;da Silva, R. M. C.;Keller, N.;
7:1:17:22     Structural, Dielectric, and Pyroelectric Properties of (1-x)PbSc0.5Ta0.5O3-(x)PbHfO3 Ceramics
DOI:10.1111/j.1551-2916.2010.03996.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Liu, Wei;Wang, Genshui;Cao, Sheng;Mao, Chaoliang;Dong, Xianlin;
7:1:17:23     Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by spectroscopic ellipsometry
DOI:10.1103/PhysRevB.86.224105  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;
7:1:17:24     Domain structures and nanostructures in incommensurate antiferroelectric PbxLa1-x(Zr0.9Ti0.1)O-3
DOI:10.1063/1.3460106  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: MacLaren, Ian;Villaurrutia, Rafael;Pelaiz-Barranco, Aime;
7:1:17:25     Dielectric and enhanced pyroelectric properties of (Pb0.325Sr0.675)TiO3 ceramics under direct current bias field
DOI:10.1063/1.4773219  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Lei, Xiuyun;Dong, Xianlin;Mao, Chaoliang;Chen, Ying;Cao, Fei;Wang, Genshui;
7:1:17:26     The Phase Transition Behavior of (1-x)Pb(Sc0.5Ta0.5)O-3-(x)PbHfO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04437.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Liu, Wei;Wang, Genshui;Cao, Sheng;Mao, Chaoliang;Yao, Chunhua;Cao, Fei;Dong, Xianlin;
7:1:17:27     Transformation stress induced metastable tetragonal phase in (93-92)%Pb(Zn(1/3)Nb(2/3))O(3)-(7-8)%PbTiO(3) single crystals
DOI:10.1063/1.3460804  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Chang, W. S.;Lim, L. C.;Yang, P.;Ku, C. -S.;Lee, H. -Y.;Tu, C. -S.;
7:1:17:28     Ultrabroadband dielectric spectroscopy and phonons in (Pb1-x/2Lax)(Zr0.9Ti0.1)O-3
DOI:10.1063/1.3501105  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Buixaderas, E.;Bovtun, V.;Veljko, S.;Savinov, M.;Kuzel, P.;Gregora, I.;Kamba, S.;Reaney, I.;
7:1:17:29     Pyroelectric Properties of Highly Ordered Pb(Sc0.5Ta0.5)O-3 Ceramics by a Two-Step Sintering Technique
DOI:10.1111/j.1551-2916.2010.04239.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Liu, Wei;Wang, Genshui;Cao, Sheng;Mao, Chaoliang;Yao, Chunhua;Cao, Fei;Dong, Xianlin;
7:1:17:30     Optoelectronic and Ferroelectric Properties of Cerium-Doped (Na0.5Bi0.5)(Ti0.99Fe0.01)O-3 Nanocrystalline Films on (111) Pt/TiO2/SiO2/Si: A Composition-Dependent Study
DOI:10.1021/am400196c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:8  AU: Zhang, Si;Han, Meijie;Zhang, Jinzhong;Li, Yawei;Hu, Zhigao;Chu, Junhao;
7:1:17:31     Lattice vibrations and dielectric functions of ferroelectric SrBi2-x,NdxNb2O9 bismuth layer-structured ceramics determined by infrared reflectance spectra
DOI:10.1016/j.materresbull.2010.07.007  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:7  AU: Zhu, M.;Sun, L.;Li, W. W.;Yu, W. L.;Li, Y. W.;Hu, Z. G.;Chu, J. H.;
7:1:17:32     Low thermal hysteresis pyroelectric response near the ferroelectric/antiferroelectric phase transition in Pb0.97La0.02(Zr0.42Sn0.40Ti0.18)O-3 ceramics
DOI:10.1063/1.3476284  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Zhang, Hongling;Chen, Xuefeng;Cao, Fei;Wang, Genshui;Dong, Xianlin;Gu, Yan;He, Hongliang;Liu, Yusheng;
7:1:17:33     Effect of Sintering Atmosphere on the Microstructure and Electrical Properties of Donor-Doped Barium Strontium Calcium Titanate Pyroelectric Ceramics
DOI:10.1111/j.1551-2916.2011.04621.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Mao, Chaoliang;Cao, Sheng;Yao, Chunhua;Cao, Fei;Li, Kui;Liu, Wei;Wang, Genshui;Dong, Xianlin;Hu, Xu;Yang, Chunli;
7:1:17:34     Spectroscopic ellipsometry analysis of perovskite manganite films for resistance switching devices
DOI:10.1016/j.tsf.2013.11.145  JN:THIN SOLID FILMS  PY:2014
  TC:3  AU: Yamada, Masaki;Sakai, Osamu;Nakamura, Toshihiro;
7:1:17:35     Theory of high-energy optical conductivity and the role of oxygens in manganites
DOI:10.1103/PhysRevB.84.075136  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Majidi, Muhammad Aziz;Su, Haibin;Feng, Yuan Ping;Ruebhausen, Michael;Rusydi, Andrivo;
7:1:17:36     Temperature-dependent and anisotropic optical response of layered Pr0.5Ca1.5MnO4 probed by spectroscopic ellipsometry
DOI:10.1103/PhysRevB.87.235135  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Majidi, M. A.;Thoeng, E.;Gogoi, P. K.;Wendt, F.;Wang, S. H.;Santoso, I.;Asmara, T. C.;Handayani, I. P.;van Loosdrecht, P. H. M.;Nugroho, A. A.;Ruebhausen, M.;Rusydi, A.;
7:1:17:37     Investigation on the Phase Transition Behaviors in Pb0.97La0.02(Zr0.42Sn0.40Ti0.18)O3 Ceramics
DOI:10.1080/00150191003709024  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Zhang, H. L.;Chen, X. F.;Yu, G.;Cao, F.;Mao, C. L.;Wang, G. S.;Dong, X. L.;Wang, Y. L.;
7:1:17:38     Pyroelectric response mechanism of barium strontium titanate ceramics in dielectric bolometer mode: The underlying essence of the enhancing effect of direct current bias field
DOI:10.1063/1.4812195  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Mao, Chaoliang;Cao, Sheng;Yan, Shiguang;Yao, Chunhua;Cao, Fei;Wang, Genshui;Dong, Xianlin;Hu, Xu;Yang, Chunli;
7:1:17:39     Determination of yttrium iron garnet superexchange parameters as a function of oxygen and cation stoichiometry
DOI:10.1103/PhysRevB.81.054411  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Noun, W.;Popova, E.;Bardelli, F.;Dumont, Y.;Bertacco, R.;Tagliaferri, A.;Tessier, M.;Guyot, M.;Berini, B.;Keller, N.;
7:1:17:40     Pulsed laser deposition and optical characterizations of the magnetic samarium orthoferrite
DOI:10.1016/j.tsf.2011.09.027  JN:THIN SOLID FILMS  PY:2012
  TC:2  AU: Berini, Bruno;Mistrik, Jan;Dumont, Yves;Popova, Elena;Fouchet, Arnaud;Scola, Joseph;Keller, Niels;
7:1:17:41     Geometric resonances in far-infrared reflectance spectra of PbTiO3 ceramics
DOI:10.1103/PhysRevB.84.092104  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Hlinka, J.;Simon, E.;Bogicevic, C.;Karolak, F.;Janolin, P. -E.;
7:1:17:42     Pyroelectric Responses in Pb(Sc1/2Ta1/2)O-3 Ceramics Measured from Hysteresis Loops at Various Temperatures
DOI:10.1080/00150193.2011.554243  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Liu, Wei;Wang, Genshui;Cao, Sheng;Zhang, Hongling;Dong, Xianlin;
7:1:17:43     Dielectric properties and phase transitions of [001], [110], and [111] oriented Pb(Zn1/3Nb2/3)O-3-6%PbTiO3 single crystals
DOI:10.1063/1.4812327  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Hentati, Mouhamed Amin;Dammak, Hichem;Khemakhem, Hamadi;Mai Pham Thi;
7:1:17:44     Large electric-induced pyroelectric properties in (Pb0.87La0.02Ba0.1)(Zr0.7Sn0.24Ti0.06)O-3 antiferroelectric ceramics with excess PbO (vol 109, 124111, 2011)
DOI:10.1063/1.4718410  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Zhang, Qingfeng;Jiang, Shenglin;Zeng, Yike;Fan, Maoyan;Zhang, Guangzu;Zhang, Yangyang;Yu, Yan;Wang, Jing;He, Jungang;
7:1:18:1     Ferroelectric Transition and Low-Temperature Dielectric Relaxations in Filled Tungsten Bronzes
DOI:10.1111/jace.12790  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:6  AU: Zhu, Xiao Li;Li, Kun;Chen, Xiang Ming;
7:1:18:2     Structural Evolving Sequence and Porous Ba6Zr2Nb8O30 Ferroelectric Ceramics with Ultrahigh Breakdown Field and Zero Strain
DOI:10.1111/jace.12082  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Zhang, Shan-Tao;Yuan, Guoliang;Chen, Jun;Gu, Zheng-Bin;Yang, Bin;Yin, Jiang;Cao, Wenwu;
7:1:18:3     Photoluminescence and electrical characterization of unfilled tetragonal tungsten bronze Ba4La1-xEuxTiNb9O30
DOI:10.1016/j.materresbull.2014.08.005  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Wei, T.;Wang, Y. Q.;Zhao, C. Z.;Zhan, L. Q.;
7:1:18:4     Crystal structure, dielectric and magnetic properties of Ba5NdNi15Nb8.5O30 tungsten bronze ceramic
DOI:10.1016/j.matchemphys.2012.07.015  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:2  AU: Yan, Meng;Tan, Yan Qing;Zhao, Hu;Peng, Jie;Xiao, Xiao Ling;Hu, Zhong-Bo;
7:1:18:5     Bright reddish-orange emission and enhanced electrical properties of Sm-doped unfilled tetragonal tungsten bronze Ba4LaTiNb9O30
DOI:10.1016/j.ceramint.2014.08.026  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Wei, T.;Wang, Y. Q.;Zhou, Q. J.;Li, Z. P.;Zhan, L. Q.;Jin, Q.;
7:1:18:6     Thermal hysteresis of ferroelectric transition in Sr4R2Ti4Nb6O30 (R=Sm and Eu) tetragonal tungsten bronzes
DOI:10.1063/1.3292209  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:21  AU: Zhu, X. L.;Chen, X. M.;
7:1:18:7     Crystal Structure and Dielectric Properties of Sr5RTi3Nb7O30 (R=La, Nd, Sm, and Eu) Tungsten Bronze Ceramics
DOI:10.1111/j.1551-2916.2010.04327.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Zhu, Xiao Li;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:8     Effects of Ca-dopant on the pyroelectric, piezoelectric and dielectric properties of (Sr0.6Ba0.4)(4)Na2Nb10O30 ceramics
DOI:10.1016/j.jallcom.2012.07.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Yao, Y. B.;Mak, C. L.;
7:1:18:9     Preparation and dielectric properties of unfilled tungsten bronze ferroelectrics Ba4RETiNb9O30
DOI:10.1016/j.jallcom.2013.07.164  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Hu, Changzheng;Hou, Lianjie;Fang, Liang;Liu, Laijun;
7:1:18:10     Re-entrant relaxor behavior of Ba5RTi3Nb7O30 (R = La, Nd, Sm) tungsten bronze ceramics
DOI:10.1063/1.4796135  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:10  AU: Li, Kun;Zhu, Xiao Li;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:11     Effects of Ca-substitution on structural, dielectric, and ferroelectric properties of Ba5SmTi3Nb7O30 tungsten bronze ceramics
DOI:10.1063/1.4739841  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Li, Kun;Zhu, Xiao Li;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:12     Synthesis and ferroelectric properties of rare earth compounds with tungsten bronze-type structure
DOI:10.1016/j.matchemphys.2011.06.009  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:18  AU: Bouziane, M.;Taibi, M.;Boukhari, A.;
7:1:18:13     Novel Incipient Ferroelectrics Based on Ba4MNbxTa10-xO30 where M = Zn, Mg, Co, Ni
DOI:10.1021/cm200117y  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:10  AU: Wang, L.;Sakka, Y.;Rusakov, D. A.;Mozharivskyj, Y.;Kolodiazhnyi, T.;
7:1:18:14     Relaxor ferroelectric characteristics of Ba5LaTi3Nb7O30 tungsten bronze ceramics
DOI:10.1063/1.3673913  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Li, Kun;Zhu, Xiao Li;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:15     Correlation between upconversion photoluminescence and dielectric response in Ba-substituted (Sr1-xBax)(4)(La0.85Ho0.025Yb0.125)(2)Ti4Nb6O30
DOI:10.1063/1.4887001  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Wei, T.;Wang, X. D.;Zhao, C. Z.;Liu, M. F.;Liu, J. M.;
7:1:18:16     Multiferroic ceramics in BaO-Y2O3-Fe2O3-Nb2O5 system
DOI:10.1016/j.ceramint.2010.07.022  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:12  AU: Wu, Y. J.;Gu, S. P.;Lin, Y. Q.;Hong, Z. J.;Liu, X. Q.;Chen, X. M.;
7:1:18:17     Structure and dielectric properties of Ba5NdCu1.5Nb8.5O30-delta tungsten bronze ceramics
DOI:10.1016/j.materresbull.2013.01.044  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:5  AU: Tan, Yan-Qing;Yu, Yuan;Hao, Yong-Mei;Dong, Su-Ying;Yang, Yi-Wen;
7:1:18:18     Origin and stability of the dipolar response in a family of tetragonal tungsten bronze relaxors
DOI:10.1103/PhysRevB.83.184302  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Rotaru, Andrei;Arnold, Donna C.;Daoud-Aladine, Aziz;Morrison, Finlay D.;
7:1:18:19     Investigations of Structural, Dielectric and Electrical Behaviour of Calcium Substituted Ba5NdTi3Nb7O30 Ferroelectric Ceramics
DOI:10.1080/10584587.2010.488566  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:15  AU: Ganguly, Prasun;Jha, A. K.;
7:1:18:20     Dielectric and Ferroelectric Characteristics of Ba5NdFe1.5Nb8.5O30 Tungsten Bronze Ceramics
DOI:10.1111/j.1551-2916.2010.04103.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Bai, Yang;Zhu, Xiao Li;Chen, Xiang Ming;Liu, Xiao Qiang;
7:1:18:21     Room temperature multiferroic Ba4Bi2Fe2Nb8O30: Structural, dielectric, and magnetic properties
DOI:10.1063/1.3459887  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Wu, Y. J.;Hong, Z. J.;Lin, Y. Q.;Gu, S. P.;Liu, X. Q.;Chen, X. M.;
7:1:18:22     Effects of Nb-substitution on structure, dielectric, ferroelectric and magnetic properties of Ba4Nd2Fe2Ta8O30 ceramics
DOI:10.1016/j.ceramint.2014.02.058  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Liu, S. F.;Wu, Y. J.;Li, J.;Chen, X. M.;
7:1:18:23     Ferroelectric Transition of Sr5SmTi3Nb7O30 Tungsten Bronze Ceramics Investigated Using Differential Scanning Calorimetry and Raman Scattering
DOI:10.1111/j.1551-2916.2012.05286.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Zhu, Xiao Li;Chen, Xiang Ming;
7:1:18:24     Relaxor nature in lead-free Sr5LaTi3Nb7O30 tetragonal tungsten bronze ceramics
DOI:10.1063/1.4822025  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Zhu, Xiao Li;Li, Kun;Rafiq, Muhammad Asif;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:25     Crystal Structure and Ferroelectric Behaviors of Ba5SmTi3Ta7O30 and Ba4Sm2Ti4Ta6O30 Tungsten Bronze Ceramics
DOI:10.1111/j.1551-2916.2009.03453.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Cao, Mu Xin;Zhu, Xiao Li;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:26     Crystal structure, dielectric relaxation and magnetic properties of Ba5NdNiNb9O30 ceramics
DOI:10.1016/j.matchemphys.2011.11.056  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:5  AU: Wu, Y. J.;Gu, S. P.;Wang, N.;Chen, X. M.;Li, J.;
7:1:18:27     Ferroelectric phase transition and low-temperature dielectric relaxations in Sr-4(La1-xSmx)(2)Ti4Nb6O30 ceramics
DOI:10.1063/1.3664857  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Zhu, Xiao Li;Bai, Yang;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:28     Phase transition hysteresis of ferroelectric Sr5EuTi3Nb7O30 ceramics with tetragonal tungsten bronze structure
DOI:10.1063/1.3686644  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Zhu, Xiao Li;Chen, Xiang Ming;
7:1:18:29     Evolution of structure, dielectric properties, and re-entrant relaxor behavior in Ba5LaxSm1-xTi3Nb7O30 (x=0.1, 0.25, 0.5) tungsten bronze ceramics
DOI:10.1063/1.4816480  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Li, Kun;Zhu, Xiao Li;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:30     Structural, Dielectric and Pyroelectric Properties of Praseodymium Based Complex Tungsten Bronze Ferroelectrics
DOI:10.1080/00150193.2012.738588  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Padhee, R.;Das, Piyush R.;Parida, B. N.;Choudhary, R. N. P.;
7:1:18:31     Effects of A1/A2-Sites Occupancy upon Ferroelectric Transition in (SrxBa1-x) Nb2O6 Tungsten Bronze Ceramics
DOI:10.1111/jace.12659  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Huang, C. J.;Li, K.;Liu, X. Q.;Zhu, X. L.;Chen, X. M.;
7:1:18:32     Luminescence and defect centres in MgSrAl10O17:Sm3+ phosphor
DOI:10.1016/j.jnoncrysol.2010.03.007  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2010
  TC:21  AU: Singh, Vijay;Watanabe, S.;Rao, T. K. Gundu;Chubaci, J. F. D.;Kwak, Ho-Young;
7:1:18:33     Ba(4)Ln(2)Fe(2)Ta(8)O(30) (Ln=Pr, Eu): Temperature-Stable Low Loss Dielectrics with a Tungsten Bronze Structure
DOI:10.1111/j.1551-2916.2009.03510.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Fang, Liang;Peng, Xiyang;Li, Chunchun;Hu, Changzheng;Wu, Bolin;Zhou, Huanfu;
7:1:18:34     Crystal growth and characterization of tetragonal tungsten bronze FerroNiobates Ba(2)LnFeNb(4)O(15)
DOI:10.1016/j.jcrysgro.2011.11.082  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:9  AU: Castel, E.;Veber, P.;Albino, M.;Velazquez, M.;Pechev, S.;Denux, D.;Chaminade, J. P.;Maglione, M.;Josse, M.;
7:1:18:35     Phase transitions and electrical characterizations of (K0.5Na0.5)(2x)(Sr0.6Ba0.4)(5-x)Nb10O30 (KNSBN) ceramics with 'unfilled' and 'filled' tetragonal tungsten-bronze (TTB) crystal structure
DOI:10.1016/j.jeurceramsoc.2012.07.034  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Yao, Y. B.;Mak, C. L.;Ploss, B.;
7:1:18:36     Enhanced Ferroelectric Properties of Intragranular-Porous Pb(Zr0.95Ti0.05)O-3 Ceramic Fabricated with Carbon Nanotubes
DOI:10.1111/j.1551-2916.2009.03479.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Nie, Heng Chang;Feng, Ning Bo;Chen, Xue Feng;Wang, Gen Shui;Dong, Xian Lin;Gu, Yan;He, Hong Liang;Liu, Yu Sheng;
7:1:18:37     Formation Mechanism of Intragranular Pores in Pb(Zr0.95Ti0.05)O3 Ferroelectric Ceramic
DOI:10.1111/j.1551-2916.2011.04755.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Nie, Hengchang;Dong, Xianlin;Chen, Xuefeng;Wang, Genshui;Gu, Yan;He, Hongliang;Liu, Yusheng;
7:1:18:38     New Cu3TeO6 Ceramics: Phase Formation and Dielectric Properties
DOI:10.1021/am501742z  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Zhu, Xiaoli;Wang, Zhonghua;Su, Xinming;Vilarinho, Paula M.;
7:1:18:39     Novel high dielectric constant and low-loss tetragonal tungsten bronze dielectrics Ba(5)LnMgNb(9)O(30) (Ln=La, Nd, Sm, Gd and Yb)
DOI:10.1016/j.ceramint.2013.05.100  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Wang, Xiaohong;Li, Mengxu;Zhou, Chang;Wang, Mengjie;Lu, Wenzhong;
7:1:18:40     Dielectric and ferroelectric properties of tungsten bronze ferroelectrics in SrO-Pr2O3-TiO2-Nb2O5 system
DOI:10.1016/j.matchemphys.2010.01.014  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:3  AU: Hu, Changzheng;Fang, Liang;Peng, Xiyang;Li, Chunchun;Wu, Bolin;Liu, Laijun;
7:1:18:41     Dielectric Properties of Ba4Sm2Fe2M8O30 (M=Nb, Ta) with Tetragonal Bronze Structure
DOI:10.1111/j.1551-2916.2010.03754.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Fang, Liang;Peng, Xiyang;Li, Chunchun;Hu, Changzheng;Wu, Bolin;Zhou, Huanfu;
7:1:18:42     On the nature of phase transitions in the tetragonal tungsten bronze GdK2Nb5O15 ceramics
DOI:10.1063/1.4865741  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Gagou, Y.;Amira, Y.;Lukyanchuk, I.;Mezzane, D.;Courty, M.;Masquelier, C.;Yuzyuk, Yu. I.;El Marssi, M.;
7:1:18:43     Ferroelectric phase transition and low-temperature dielectric relaxations in Sr-4(La1-xSmx)(2)Ti4Nb6O30 ceramics (vol 110, 114101, 2011)
DOI:10.1063/1.3679431  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Zhu, Xiao Li;Bai, Yang;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:18:44     Al2TeO6: Mechanism of phase formation and dielectric properties
DOI:10.1016/j.scriptamat.2012.07.047  JN:SCRIPTA MATERIALIA  PY:2012
  TC:2  AU: Su, Xinming;Wu, Aiying;Vilarinho, Paula M.;
7:1:18:45     Monte Carlo Study of Ferroelectric Properties of Tetragonal Tungsten Bronze Compounds
DOI:10.1080/00150193.2010.484712  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Taifi, E.;Lukyanchuk, I.;El Amraoui, Y.;Mezzane, D.;Gagou, Y.;
7:1:19:1     Origins of Electro-Mechanical Coupling in Polycrystalline Ferroelectrics During Subcoercive Electrical Loading
DOI:10.1111/j.1551-2916.2010.04240.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:71  AU: Pramanick, Abhijit;Damjanovic, Dragan;Daniels, John E.;Nino, Juan C.;Jones, Jacob L.;
7:1:19:2     Substrate Clamping Effects on Irreversible Domain Wall Dynamics in Lead Zirconate Titanate Thin Films
DOI:10.1103/PhysRevLett.108.157604  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:15  AU: Griggio, F.;Jesse, S.;Kumar, A.;Ovchinnikov, O.;Kim, H.;Jackson, T. N.;Damjanovic, D.;Kalinin, S. V.;Trolier-McKinstry, S.;
7:1:19:3     Domain wall and interphase boundary motion in a two-phase morphotropic phase boundary ferroelectric: Frequency dispersion and contribution to piezoelectric and dielectric properties
DOI:10.1103/PhysRevB.86.024104  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Jones, Jacob L.;Aksel, Elena;Tutuncu, Goknur;Usher, Tedi-Marie;Chen, Jun;Xing, Xianran;Studer, Andrew J.;
7:1:19:4     Deaging and Asymmetric Energy Landscapes in Electrically Biased Ferroelectrics
DOI:10.1103/PhysRevLett.108.177601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:16  AU: Tutuncu, Goknur;Damjanovic, Dragan;Chen, Jun;Jones, Jacob L.;
7:1:19:5     Critical thickness for extrinsic contributions to the dielectric and piezoelectric response in lead zirconate titanate ultrathin films
DOI:10.1063/1.3527970  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:22  AU: Bastani, Yaser;Schmitz-Kempen, Thorsten;Roelofs, Andreas;Bassiri-Gharb, Nazanin;
7:1:19:6     First-order morphological transition of ferroelastic domains in ferroelectric thin films
DOI:10.1016/j.actamat.2014.04.049  JN:ACTA MATERIALIA  PY:2014
  TC:1  AU: Britson, Jason;Nelson, Christopher;Pan, Xiaoqing;Chen, Long-Qing;
7:1:19:7     Temperature-dependent dielectric nonlinearity of relaxor ferroelectric Pb0.92La0.08Zr0.52Ti0.48O3 thin films
DOI:10.1063/1.4807665  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Ma, Beihai;Hu, Zhongqiang;Liu, Shanshan;Tong, Sheng;Narayanan, Manoj;Koritala, Rachel E.;Balachandran, Uthamalingam;
7:1:19:8     Nanoscale Origins of Nonlinear Behavior in Ferroic Thin Films
DOI:10.1002/adfm.201201025  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:9  AU: Vasudevan, Rama K.;Okatan, M. Baris;Duan, Chen;Ehara, Yoshitaka;Funakubo, Hiroshi;Kumar, Amit;Jesse, Stephen;Chen, Long-Qing;Kalinin, Sergei V.;Nagarajan, Valanoor;
7:1:19:9     Temperature-dependent polarization back-switching and dielectric nonlinearity in PbZr0.4Ti0.6O3 ferroelectric thin films
DOI:10.1063/1.4890340  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Peng, Bin;Xie, Zhenkun;Yue, Zhenxing;Li, Longtu;
7:1:19:10     Grain size dependence of properties in lead nickel niobate-lead zirconate titanate films
DOI:10.1063/1.3284945  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:19  AU: Griggio, F.;Trolier-McKinstry, S.;
7:1:19:11     Influence of a Single Grain Boundary on Domain Wall Motion in Ferroelectrics
DOI:10.1002/adfm.201302457  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:6  AU: Marincel, Daniel M.;Zhang, Huairuo;Kumar, Amit;Jesse, Stephen;Kalinin, Sergei V.;Rainforth, W. M.;Reaney, Ian M.;Randall, Clive A.;Trolier-McKinstry, Susan;
7:1:19:12     Extensive domain wall motion and deaging resistance in morphotropic 0.55Bi(Ni1/2Ti1/2)O-3-0.45PbTiO(3) polycrystalline ferroelectrics
DOI:10.1063/1.4870506  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Tutuncu, Goknur;Fan, Longlong;Chen, Jun;Xing, Xianran;Jones, Jacob L.;
7:1:19:13     Enhanced dielectric and piezoelectric response in PZT superlattice-like films by leveraging spontaneous Zr/Ti gradient formation
DOI:10.1016/j.actamat.2011.11.030  JN:ACTA MATERIALIA  PY:2012
  TC:12  AU: Bastani, Yaser;Bassiri-Gharb, Nazanin;
7:1:19:14     Neutron irradiation effects on domain wall mobility and reversibility in lead zirconate titanate thin films
DOI:10.1063/1.4795869  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Graham, Joseph T.;Brennecka, Geoff L.;Ferreira, Paulo;Small, Leo;Duquette, David;Apblett, Christopher;Landsberger, Sheldon;Ihlefeld, Jon F.;
7:1:19:15     Strain-modulated piezoelectric and electrostrictive nonlinearity in ferroelectric thin films without active ferroelastic domain walls
DOI:10.1063/1.3665410  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Bassiri-Gharb, Nazanin;Trolier-McKinstry, Susan;Damjanovic, Dragan;
7:1:19:16     Mapping piezoelectric nonlinearity in the Rayleigh regime using band excitation piezoresponse force microscopy
DOI:10.1063/1.3593138  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Griggio, F.;Jesse, S.;Kumar, A.;Marincel, D. M.;Tinberg, D. S.;Kalinin, S. V.;Trolier-McKinstry, S.;
7:1:19:17     Evaluation of domain wall motion during polymorphic phase transition in (K, Na)NbO3-based piezoelectric ceramics by nonlinear response measurements
DOI:10.1063/1.3553857  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Peng, Bin;Yue, Zhenxing;Li, Longtu;
7:1:19:18     Effect of domain structure on dielectric nonlinearity in epitaxial BiFeO3 films
DOI:10.1063/1.3533017  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Ihlefeld, J. F.;Folkman, C. M.;Baek, S. H.;Brennecka, G. L.;George, M. C.;Carroll, J. F., III;Eom, C. B.;
7:1:19:19     Composition dependence of local piezoelectric nonlinearity in (0.3)Pb(Ni0.33Nb0.67)O-3-(0.7)Pb(ZrxTi1-x)O-3 films
DOI:10.1063/1.3622312  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Griggio, F.;Jesse, S.;Qu, W.;Kumar, A.;Ovchinnikov, O.;Tinberg, D. S.;Kalinin, S. V.;Trolier-McKinstry, S.;
7:1:19:20     An in situ diffraction study of domain wall motion contributions to the frequency dispersion of the piezoelectric coefficient in lead zirconate titanate
DOI:10.1063/1.4789903  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Seshadri, Shruti B.;Prewitt, Anderson D.;Studer, Andrew J.;Damjanovic, Dragan;Jones, Jacob L.;
7:1:19:21     Rayleigh analysis of dielectric properties in textured K0.5Na0.5NbO3 ceramics
DOI:10.1063/1.4902858  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Haugen, Astri Bjornetun;Morozov, Maxim I.;Jones, Jacob L.;Einarsrud, Mari-Ann;
7:1:19:22     Chemical homogeneity effects on the nonlinear dielectric response of lead zirconate titanate thin films
DOI:10.1063/1.4742171  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Ihlefeld, Jon F.;Shelton, Christopher T.;
7:1:19:23     Effects of high energy x ray and proton irradiation on lead zirconate titanate thin films' dielectric and piezoelectric response
DOI:10.1063/1.4805045  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Bastani, Y.;Cortes-Pena, A. Y.;Wilson, A. D.;Gerardin, S.;Bagatin, M.;Paccagnella, A.;Bassiri-Gharb, N.;
7:1:19:24     A modified Rietveld method to model highly anisotropic ceramics
DOI:10.1016/j.actamat.2011.11.050  JN:ACTA MATERIALIA  PY:2012
  TC:3  AU: Tutuncu, G.;Motahari, M.;Daymond, M. R.;Ustundag, E.;
7:1:19:25     Intrinsic effect of Mn doping in PZN-12%PT single crystals
DOI:10.1063/1.3331817  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Hentati, Mouhamed Amin;Guennou, Mael;Dammak, Hichem;Khemakhem, Hamadi;Thi, Mai Pham;
7:1:19:26     Fabrication of pure-perovskite PMN-PT thin films on SrTiO3 substrates using pulsed laser deposition
DOI:10.1016/j.jcrysgro.2010.03.012  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:2  AU: Shang, Jie;Zhang, Hui;Li, Yong;Zhou, Xiaofang;Zhang, Pengxiang;
7:1:20:1     Sintering Temperature Dependence of Energy-Storage Properties in (Ba,Sr)TiO3 Glass-Ceramics
DOI:10.1111/j.1551-2916.2010.04301.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:43  AU: Zhang, Yong;Huang, Jiajia;Ma, Tao;Wang, Xiangrong;Deng, Changsheng;Dai, Xiaming;
7:1:20:2     Correlation between dielectric breakdown strength and interface polarization in barium strontium titanate glass ceramics
DOI:10.1063/1.3293456  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:34  AU: Huang, Jiajia;Zhang, Yong;Ma, Tao;Li, Hongtao;Zhang, Linwen;
7:1:20:3     Glass additive in barium titanate ceramics and its influence on electrical breakdown strength in relation with energy storage properties
DOI:10.1016/j.jeurceramsoc.2011.09.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:26  AU: Wang, Xiangrong;Zhang, Yong;Song, Xiaozhen;Yuan, Zongbao;Ma, Tao;Zhang, Qian;Deng, Changsheng;Liang, Tongxiang;
7:1:20:4     Molybdenum ion: a structural probe in lithium-antimony-germanate glass system by means of dielectric and spectroscopic studies
DOI:10.1007/s10853-014-8345-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:1  AU: Vijay, R.;Babu, P. Ramesh;Gandhi, Y.;Piasecki, M.;Rao, D. Krishna;Veeraiah, N.;
7:1:20:5     Dielectric relaxation behavior and energy storage properties in Ba0.4Sr0.6Zr0.15Ti0.85O3 ceramics with glass additives
DOI:10.1016/j.ceramint.2013.02.009  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Wu, Ting;Pu, Yongping;Chen, Kai;
7:1:20:6     Enhanced energy storage properties of dysprosium doped strontium titanate ceramics
DOI:10.1016/j.ceramint.2013.07.126  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Hu, Qi-Guo;Shen, Zong-Yang;Li, Yue-Ming;Wang, Zhu-Mei;Luo, Wen-Qin;Xie, Zhi-Xiang;
7:1:20:7     Structure and Dielectric Properties of Re0.02Sr0.97TiO3 (Re = La, Sm, Gd, Er) Ceramics for High-Voltage Capacitor Applications
DOI:10.1111/jace.12364  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Shen, Zong-Yang;Hu, Qi-Guo;Li, Yue-Ming;Wang, Zhu-Mei;Luo, Wen-Qin;Hong, Yan;Xie, Zhi-Xiang;Liao, Run-Hua;
7:1:20:8     Dielectric relaxation behavior and energy storage properties in SrTiO3 ceramics with trace amounts of ZrO2 additives
DOI:10.1016/j.ceramint.2014.05.147  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Wang, Zhijian;Cao, Minghe;Yao, Zhonghua;Song, Zhe;Li, Guangyao;Hu, Wei;Hao, Hua;Liu, Hanxing;
7:1:20:9     Structural and dielectric characterization of Gd2O3-added BaO-Na2O-Nb2O5-SiO2 glass-ceramic composites
DOI:10.1016/j.scriptamat.2011.04.027  JN:SCRIPTA MATERIALIA  PY:2011
  TC:17  AU: Zhou, Yi;Zhang, Qingmeng;Luo, Jun;Tang, Qun;Du, Jun;
7:1:20:10     High Energy Density, High Temperature Capacitors Utilizing Mn-Doped 0.8CaTiO(3)-0.2CaHfO(3) Ceramics
DOI:10.1111/j.1551-2916.2011.04962.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:14  AU: Shay, Dennis P.;Podraza, Nikolas J.;Donnelly, Niall J.;Randall, Clive A.;
7:1:20:11     Effect of microwave processes on the energy-storage properties of barium strontium titanate glass ceramics
DOI:10.1557/jmr.2013.386  JN:JOURNAL OF MATERIALS RESEARCH  PY:2014
  TC:1  AU: Wang, Jinwen;Tang, Linjiang;Shen, Bo;Zhai, Jiwei;
7:1:20:12     Microstructure and ferroelectric properties of Nb2O5-modified BiFeO3-BaTiO3 lead-free ceramics for energy storage
DOI:10.1016/j.matlet.2014.08.133  JN:MATERIALS LETTERS  PY:2014
  TC:4  AU: Wang, Tong;Jin, Li;Tian, Ye;Shu, Longlong;Hu, Qingyuan;Wei, Xiaoyong;
7:1:20:13     Effects of ZnNb2O6 addition on BaTiO3 ceramics for energy storage
DOI:10.1016/j.mseb.2013.07.003  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:6  AU: Wang, Tong;Wei, Xiaoyong;Hu, Qingyuan;Jin, Li;Xu, Zhuo;Feng, Yujun;
7:1:20:14     Effect of the Ba/Na ratio on the microstructure and dielectric properties of (BaO, Na2O)-Nb2O5-SiO2 glass-ceramics
DOI:10.1016/j.ceramint.2013.12.100  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Xue, Shuangxi;Wang, Jinwen;Liu, Shaohui;Zhang, Wenqin;Tang, Linjiang;Shen, Bo;Zhai, Jiwei;
7:1:20:15     Influence of sintering temperature on energy storage properties of BaTiO3-(Sr1-1.5xBix) TiO3 ceramics
DOI:10.1016/j.ceramint.2012.02.064  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Zhang, Qian;Zhang, Yong;Wang, Xiangrong;Ma, Tao;Yuan, Zongbao;
7:1:20:16     Effect of BaF2 Addition on Crystallization Kinetics and Dielectric Properties of B2O3-Nb2O5-SrO-BaO Glass-Ceramics
DOI:10.1111/j.1551-2916.2010.04223.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:14  AU: Zeng, Yike;Qin, Xiaoye;Jiang, Shenglin;Zhang, Guangzu;Zhang, Ling;
7:1:20:17     Crystallization kinetics and dielectric characterization of CeO2-added BaO-SrO-Nb2O5-B2O3-SiO2 glass-ceramics
DOI:10.1016/j.ceramint.2012.12.069  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:10  AU: Liu, Tao-yong;Chen, Guo-hua;Song, Jun;Yuan, Chang-lai;
7:1:20:18     Lanthanum doping effect in barium strontium titanate glass ceramics
DOI:10.1016/j.ceramint.2014.08.010  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Wang, Xiangrong;Zhang, Yong;Zhu, Jia;Song, Xiaozhen;Lv, Ruifang;Liu, Jianan;Zhang, Meimei;
7:1:20:19     BaTiO3-SrTiO3 layered dielectrics for energy storage
DOI:10.1016/j.matlet.2010.12.043  JN:MATERIALS LETTERS  PY:2011
  TC:11  AU: Chao, Sheng;Dogan, Fatih;
7:1:20:20     Crystallization mechanism and ac conductivity studies on strontium barium niobate glass-ceramics
DOI:10.1016/j.ceramint.2012.08.061  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Wang, Mengjie;Zhang, Yong;Liu, Xiaolin;Wang, Xiangrong;
7:1:20:21     Dielectric properties and charge-discharge behaviors in niobate glass ceramics for energy-storage applications
DOI:10.1016/j.jallcom.2014.08.006  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Xue, Shuangxi;Liu, Shaohui;Zhang, Wenqin;Wang, Jinwen;Tang, Linjiang;Shen, Bo;Zhai, Jiwei;
7:1:20:22     Structural Optimization and Improved Discharged Energy Density for Niobate Glass-Ceramics by La2O3 Addition
DOI:10.1111/jace.12159  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Zhou, Yi;Zhang, Qingmeng;Luo, Jun;Tang, Qun;Du, Jun;
7:1:20:23     Effect of BaF2 addition on crystallization kinetics and electrical properties of BaO-SrO-Nb2O5-B2O3-SiO2 glass-ceramics
DOI:10.1016/j.jnoncrysol.2013.07.013  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2013
  TC:1  AU: Chen, Guo-hua;Liu, Tao-yong;Yuan, Chang-lai;Yang, Yun;Zhou, Chang-rong;
7:1:20:24     Reverse boundary layer capacitor model in glass/ceramic composites for energy storage applications
DOI:10.1063/1.4775493  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Wei, Xiaoyong;Yan, Haixue;Wang, Tong;Hu, Qingyuan;Viola, G.;Grasso, Salvatore;Jiang, Qinghui;Jin, Li;Xu, Zhuo;Reece, Michael J.;
7:1:20:25     Blocking effect of crystal-glass interface in lanthanum doped barium strontium titanate glass-ceramics
DOI:10.1016/j.materresbull.2013.05.088  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Wang, Xiangrong;Zhang, Yong;Baturin, Ivan;Liang, Tongxiang;
7:1:20:26     Preparation and dielectric properties of BaCu(B2O5)-doped SrTiO3-based ceramics for energy storage
DOI:10.1016/j.mseb.2013.08.016  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:3  AU: Li, Lingxia;Yu, Xiaoxu;Cai, Haocheng;Liao, Qingwei;Han, Yemei;Gao, Zhengdong;
7:1:20:27     Improved discharged energy density for niobate-based B2O3 system glass-ceramics by CeO2 addition
DOI:10.1016/j.matlet.2014.08.067  JN:MATERIALS LETTERS  PY:2014
  TC:3  AU: Chen, Guohua;Song, Jun;Kang, Xiaoling;Yuan, Changlai;Zhou, Changrong;
7:1:20:28     Dielectric breakdown of BaO-B2O3-ZnO-[(BaZr0.2Ti0.80)O-3](0.85) [(Ba0.70Ca0.30)TiO3](0.15) glass-ceramic composites
DOI:10.1016/j.jnoncrysol.2012.05.018  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2012
  TC:7  AU: Puli, Venkata Sreenivas;Kumar, Ashok;Katiyar, R. S.;Su, X.;Busta, C. M.;Chrisey, D. B.;Tomozawa, M.;
7:1:20:29     Property optimization of BST-based composite glass ceramics for energy-storage applications.
DOI:10.1016/j.ceramint.2013.07.145  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Wang, Enwen;Tang, Linjiang;Shen, Bo;Zhai, Ewei;
7:1:20:30     Structure and dielectric properties of BaxSr1-xTiO3-based glass ceramics for energy storage
DOI:10.1016/j.jallcom.2014.08.077  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Zhang, Wenqin;Xue, Shuangxi;Liu, Shaohui;Wang, Jinwen;Shen, Bo;Zhai, Jiwei;
7:1:20:31     Microstructure and energy-storage performance of PbO-B2O3-SiO2-ZnO glass added (Pb0.97La0.02)(Zr0.97Ti0.03)O-3 antiferroelectric thick films
DOI:10.1016/j.materresbull.2012.10.005  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Hao, Xihong;Wang, Peng;Zhang, Xuefeng;Xu, Jinbao;
7:1:20:32     Morphological evolution of tridymite crystal in SrO-BaO-Nb2O5-CaO-SiO2-B2O3 ferroelectric glass-ceramic
DOI:10.1016/j.matlet.2014.04.104  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Liu, Xiaoyan;Pu, Yongping;Wang, Peikui;Dong, Zijing;Sun, Zixiong;Hu, Yao;
7:1:20:33     Charge-Discharge Properties of PLZT x/90/10 Ceramics
DOI:10.1080/10584587.2013.821016  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Wawrzala, P.;Korzekwa, J.;
7:1:20:34     Optimization of energy storage density in ANb(2)O(6)-NaNbO3-SiO2 (A = [(1-x)Pb, xSr]) nanostructured glass-ceramic dielectrics
DOI:10.1016/j.ceramint.2012.04.087  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Han, D. F.;Zhang, Q. M.;Luo, J.;Tang, Q.;Du, J.;
7:1:20:35     Effect of the Sr/Ba ratio on the microstructures and dielectric properties of SrO-BaO-Nb2O5-B2O3 glass-ceramics
DOI:10.1016/j.matlet.2013.11.092  JN:MATERIALS LETTERS  PY:2014
  TC:5  AU: Song, Jun;Chen, Guo-hua;Yuan, Chang-lai;Yang, Yun;
7:1:20:36     Preparation and Dielectric Characterization of Lead-Free Niobate Glass-Ceramic Composites Added with Lu2O3
DOI:10.1111/jace.13010  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Tian, Yuming;Zhou, Yi;Du, Jun;
7:1:20:37     Effects of MnO2 concentration on dielectric properties of barium strontium titanate glass ceramics
DOI:10.1016/j.ceramint.2011.04.049  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Wang, Xiang-Rong;Zhang, Yong;Ma, Tao;Deng, Chang-Sheng;Dai, Xia-Ming;
7:1:20:38     Characterization of PLZST-PMW dielectric ceramics
DOI:10.1016/j.materresbull.2014.08.031  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Wu, Wenfen;Zhang, Yong;Zhang, Qian;Wang, Xiangrong;Song, Xiaozhen;
7:1:20:39     On the germanium-oxygen coordination number in lead germanate glasses
DOI:10.1016/j.jnoncrysol.2013.11.032  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2014
  TC:2  AU: Alderman, Oliver L. G.;Hannon, Alex C.;Holland, Diane;Umesaki, Norimasa;
7:1:20:40     Electrical properties and structure of lead-borate glass containing iron ions
DOI:10.1016/j.ssi.2014.01.042  JN:SOLID STATE IONICS  PY:2014
  TC:1  AU: Szreder, N. A.;Barczynski, R. J.;Karczewski, J.;Gazda, M.;
7:1:21:1     Charge migration in Pb(Zr,Ti)O-3 ceramics and its relation to ageing, hardening, and softening
DOI:10.1063/1.3284954  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:35  AU: Morozov, M. I.;Damjanovic, D.;
7:1:21:2     Position of defects with respect to domain walls in Fe3+-doped Pb[Zr0.52Ti0.48]O-3 piezoelectric ceramics
DOI:10.1063/1.3555465  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:29  AU: Jakes, Peter;Erdem, Emre;Eichel, Ruediger-A.;Jin, Li;Damjanovic, Dragan;
7:1:21:3     Influence of Alkaline and Niobium Excess on Sintering and Microstructure of Sodium-Potassium Niobate (K-0.5 Na-0.5)NbO3
DOI:10.1111/j.1551-2916.2010.03578.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:38  AU: Acker, Jerome;Kungl, Hans;Hoffmann, Michael J.;
7:1:21:4     Processing of Manganese-Doped [Bi0.5Na0.5]TiO3 Ferroelectrics: Reduction and Oxidation Reactions During Calcination and Sintering
DOI:10.1111/j.1551-2916.2010.04249.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:23  AU: Aksel, Elena;Jakes, Peter;Erdem, Emre;Smyth, Donald M.;Ozarowski, Andrew;van Tol, Johan;Jones, Jacob L.;Eichel, Ruediger-A.;
7:1:21:5     Defect structure and materials "hardening" in Fe2O3-doped [Bi0.5Na0.5]TiO3 ferroelectrics
DOI:10.1063/1.3455888  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:21  AU: Aksel, Elena;Erdem, Emre;Jakes, Peter;Jones, Jacob L.;Eichel, Ruediger-A.;
7:1:21:6     Domain wall contributions in Pb(Zr,Ti)O-3 ceramics at morphotropic phase boundary: A study of dielectric dispersion
DOI:10.1063/1.3455328  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:26  AU: Jin, Li;Porokhonskyy, Viktor;Damjanovic, Dragan;
7:1:21:7     Interactions of defect complexes and domain walls in CuO-doped ferroelectric (K,Na)NbO3
DOI:10.1063/1.4811268  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Eichel, Ruediger-A.;Eruenal, Ebru;Jakes, Peter;Koerbel, Sabine;Elsaesser, Christian;Kungl, Hans;Acker, Jerome;Hoffmann, Michael J.;
7:1:21:8     Achieving Both High d(33) and High Q(m) for the Pb(Zr0.26Sn0.26Ti0.48)(1-x)FexO3-x/2 Ternary System for Use in High-Power Ultrasonic Transducers
DOI:10.1007/s11664-014-3311-2  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:1  AU: Xing, Zhuo;Jin, Li;Wang, Tong;Hu, Qingyuan;Feng, Yujun;Wei, Xiaoyong;
7:1:21:9     CuO-doped NaNbO3 antiferroelectrics: Impact of aliovalent doping and nonstoichiometry on the defect structure and formation of secondary phases
DOI:10.1103/PhysRevB.84.184113  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Eruenal, Ebru;Jakes, Peter;Koerbel, Sabine;Acker, Jerome;Kungl, Hans;Elsaesser, Christian;Hoffmann, Michael J.;Eichel, Ruediger-A.;
7:1:21:10     Manganese-doped (1-x)BiScO3-xPbTiO(3) high-temperature ferroelectrics: Defect structure and mechanism of enhanced electric resistivity
DOI:10.1103/PhysRevB.84.064113  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Drahus, Michael D.;Jakes, Peter;Erdem, Emre;Schaab, Silke;Chen, Jun;Ozerov, Mykhaylo;Zvyagin, Sergei;Eichel, Ruediger-A;
7:1:21:11     Effect of Mn doping on the piezoelectric properties of 0.82Pb(Zr1/2Ti1/2)O-3-0.03Pb(Mn1/3Sb2/3)O-3-0.15Pb(Zn1/3Nb2/3)O-3 ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.11.034  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Yan, Yangxi;Xu, Yonghao;Feng, Yujun;
7:1:21:12     Defect structure of the mixed ionic-electronic conducting Sr[Ti,Fe]O-x solid-solution system - Change in iron oxidation states and defect complexation
DOI:10.1016/j.ssi.2010.09.045  JN:SOLID STATE IONICS  PY:2011
  TC:17  AU: Drahus, Michael D.;Jakes, Peter;Erdem, Emre;Eichel, Ruediger-A;
7:1:21:13     Formation of vacancies and copper substitutionals in potassium sodium niobate under various processing conditions
DOI:10.1103/PhysRevB.81.174115  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Koerbel, Sabine;Marton, Pavel;Elsaesser, Christian;
7:1:21:14     High-Frequency EPR Analysis of MnO2-Doped [Bi0.5Na0.5]TiO3-BaTiO3 Piezoelectric Ceramics - Manganese Oxidation States and Materials 'Hardening'
DOI:10.1080/00150193.2012.675831  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Erdem, Emre;Schaab, Silke;Jo, Wook;Ozarowski, Andrew;Van Tol, Johan;Eichel, Ruediger-A;
7:1:21:15     Structural dependence of piezoelectric, dielectric and ferroelectric properties of K0.5Na0.5(Nb1-2x/5Cux)O-3 lead-free ceramics with high Q(m)
DOI:10.1016/j.materresbull.2012.09.049  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:6  AU: Tan, Xiaohui;Fan, Huiqing;Ke, Shanming;Zhou, Limin;Mai, Yiu-Wing;Huang, Haitao;
7:1:21:16     Formation and switching of defect dipoles in acceptor-doped lead titanate: A kinetic model based on first-principles calculations
DOI:10.1103/PhysRevB.88.024107  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Erhart, Paul;Traskelin, Petra;Albe, Karsten;
7:1:21:17     Effect of Sn Content on Structure and Properties Near the Morphotropic Phase Boundary in a PbSnO3-PbZrO3-PbTiO3 Ternary System
DOI:10.1007/s11664-014-3199-x  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:2  AU: Xing, Zhuo;Jin, Li;Feng, Yujun;Wei, Xiaoyong;
7:1:21:18     Effect of MnO2 Addition on the Electrical Properties of PNZST Ceramics
DOI:10.1007/s11664-014-3106-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Yan, Yangxi;He, Hongliang;Feng, Yujun;
7:1:21:19     Influence of the A/B nonstoichiometry, composition modifiers, and preparation methods on properties of Li- and Ta-modified (K,Na)NbO3 ceramics
DOI:10.1063/1.4768211  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Morozov, Maxim I.;Hoffmann, Michael J.;Benkert, Katrin;Schuh, Carsten;
7:1:21:20     Sintering and microstructure of potassium niobate ceramics with stoichiometric composition and with potassium- or niobium excess
DOI:10.1016/j.jeurceramsoc.2013.03.011  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Acker, Jerome;Kungl, Hans;Hoffmann, Michael J.;
7:1:21:21     Interaction of Modified (K,Na)NbO3 Ceramics with Ag-Containing Electrodes
DOI:10.1111/j.1551-2916.2011.04607.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Morozov, Maxim I.;Baeurer, Michael;Hoffmann, Michael J.;
7:1:21:22     Switching of a substitutional-iron/oxygen-vacancy defect complex in ferroelectric PbTiO3 from first principles
DOI:10.1103/PhysRevB.83.020106  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Marton, P.;Elsaesser, C.;
7:1:21:23     Ab initio and atomistic study of ferroelectricity in copper-doped potassium niobate
DOI:10.1103/PhysRevB.84.014109  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Koerbel, Sabine;Elsaesser, Christian;
7:1:21:24     Influence of reducing atmosphere on the defect chemistry of lead lanthanum zirconate titanate (8/65/35)
DOI:10.1016/j.ssi.2012.09.003  JN:SOLID STATE IONICS  PY:2012
  TC:1  AU: Schaab, S.;Schulz, M.;Fritze, H.;Eichel, R. -A.;Erdem, E.;Ruescher, C. H.;Hummelt, S.;Granzow, T.;
7:1:21:25     Influence of co-dopants average valence on microstructural and electromechanical properties of lead titanate ceramics
DOI:10.1016/j.jeurceramsoc.2013.12.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Amarande, L.;Miclea, C.;Cioangher, M.;Grecu, M. N.;Pasuk, I.;Negrea, R. F.;
7:1:21:26     Structure and electrical properties of (1-x)(0.1BiYbO(3)-0.9PbTiO(3))-xPb (Zn1/3Nb2/3)O-3 high-temperature ternary piezoelectric ceramics
DOI:10.1016/j.matlet.2013.09.061  JN:MATERIALS LETTERS  PY:2014
  TC:4  AU: Shi, Liang;Liao, Qingwei;Zhang, Boping;Zhang, Junying;Guo, Dong;
7:1:21:27     The influence of different niobium pentoxide precursors on the solid-state synthesis of potassium sodium niobate
DOI:10.1016/j.jeurceramsoc.2013.07.006  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Hrescak, Jitka;Bencan, Andreja;Rojac, Tadej;Malic, Barbara;
7:1:22:1     Interplay between static and dynamic polar correlations in relaxor Pb(Mg1/3Nb2/3)O-3
DOI:10.1103/PhysRevB.81.144127  JN:PHYSICAL REVIEW B  PY:2010
  TC:23  AU: Stock, C.;Van Eijck, L.;Fouquet, P.;Maccarini, M.;Gehring, P. M.;Xu, Guangyong;Luo, H.;Zhao, X.;Li, J. -F.;Viehland, D.;
7:1:22:2     Condensation of the atomic relaxation vibrations in lead-magnesium-niobate at T=T*
DOI:10.1063/1.4821772  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Prosandeev, Sergey;Raevski, Igor P.;Malitskaya, Maria A.;Raevskaya, Svetlana I.;Chen, Haydn;Chou, Chen-Chia;Dkhil, Brahim;
7:1:22:3     Soft Mode Doublet in PbMg1/3Nb2/3O3 Relaxor Investigated with Hyper-Raman Scattering
DOI:10.1103/PhysRevLett.105.017601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:23  AU: Al-Zein, A.;Hlinka, J.;Rouquette, J.;Hehlen, B.;
7:1:22:4     Polar nanoregions and diffuse scattering in the relaxor ferroelectric PbMg1/3Nb2/3O3
DOI:10.1103/PhysRevB.85.224109  JN:PHYSICAL REVIEW B  PY:2012
  TC:14  AU: Pasciak, M.;Welberry, T. R.;Kulda, J.;Kempa, M.;Hlinka, J.;
7:1:22:5     Origin of diffuse scattering in relaxor ferroelectrics
DOI:10.1103/PhysRevB.81.144102  JN:PHYSICAL REVIEW B  PY:2010
  TC:22  AU: Ganesh, P.;Cockayne, E.;Ahart, M.;Cohen, R. E.;Burton, B.;Hemley, Russell J.;Ren, Yang;Yang, Wenge;Ye, Z. -G.;
7:1:22:6     Development of nanoscale polarization fluctuations in relaxor-based (1-x)Pb(Zn1/3Nb2/3)O-3-xPbTiO(3) ferroelectrics studied by Brillouin scattering
DOI:10.1103/PhysRevB.87.014101  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Tsukada, Shinya;Hidaka, Yuki;Kojima, Seiji;Bokov, Alexei A.;Ye, Zuo-Guang;
7:1:22:7     Anisotropic Local Correlations and Dynamics in a Relaxor Ferroelectric
DOI:10.1103/PhysRevLett.110.147602  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:15  AU: Takenaka, Hiroyuki;Grinberg, Ilya;Rappe, Andrew M.;
7:1:22:8     Two-component model of the neutron diffuse scattering in the relaxor ferroelectric PZN-4.5% PT
DOI:10.1103/PhysRevB.82.134124  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Xu, Zhijun;Wen, Jinsheng;Xu, Guangyong;Stock, C.;Gardner, J. S.;Gehring, P. M.;
7:1:22:9     Dynamics of Nanoscale Polarization Fluctuations in a Uniaxial Relaxor
DOI:10.1103/PhysRevLett.113.167601  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Ondrejkovic, P.;Kempa, M.;Kulda, J.;Frick, B.;Appel, M.;Combet, J.;Dec, J.;Lukasiewicz, T.;Hlinka, J.;
7:1:22:10     Damped soft phonons and diffuse scattering in (Bi1/2Na1/2)TiO3
DOI:10.1103/PhysRevB.87.064109  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Matsuura, M.;Iida, H.;Hirota, K.;Ohwada, K.;Noguchi, Y.;Miyayama, M.;
7:1:22:11     Evidence for anisotropic polar nanoregions in relaxor Pb(Mg1/3Nb2/3)O-3: A neutron study of the elastic constants and anomalous TA phonon damping in PMN
DOI:10.1103/PhysRevB.86.104108  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Stock, C.;Gehring, P. M.;Hiraka, H.;Swainson, I.;Xu, Guangyong;Ye, Z. -G.;Luo, H.;Li, J. -F.;Viehland, D.;
7:1:22:12     Simultaneous softening of acoustic and optical modes in cubic PbTiO3
DOI:10.1103/PhysRevB.86.134306  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Tomeno, Izumi;Fernandez-Baca, Jaime A.;Marty, Karol J.;Oka, Kunihiko;Tsunoda, Yorihiko;
7:1:22:13     Soft mode in cubic PbTiO3 by hyper-Raman scattering
DOI:10.1103/PhysRevB.87.064101  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Hlinka, J.;Hehlen, B.;Kania, A.;Gregora, I.;
7:1:22:14     The intermediate temperature T* revealed in relaxor polymers
DOI:10.1063/1.4881268  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Liu, B. L.;Tian, B. B.;Geiger, S.;Hu, Z. G.;Zhao, X. L.;Zou, Y. H.;Wang, J. L.;Sun, J. L.;Sun, S.;Dkhil, B.;Meng, X. J.;Chu, J. H.;
7:1:22:15     Dynamical mechanism of phase transitions in A-site ferroelectric relaxor (Na1/2Bi1/2) TiO3
DOI:10.1103/PhysRevB.90.134104  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Deng, Guochu;Danilkin, Sergey;Zhang, Haiwu;Imperia, Paolo;Li, Xiaobing;Zhao, Xiangyong;Luo, Haosu;
7:1:22:16     Neutron diffuse scattering of (1-x)(Na0.5Bi0.5)TiO3-xBaTiO(3) relaxor ferroelectric single crystals
DOI:10.1016/j.scriptamat.2014.04.011  JN:SCRIPTA MATERIALIA  PY:2014
  TC:2  AU: Zhang, Haiwu;Deng, Guochu;Studer, Andrew J.;Li, Xiaobing;Zhao, Xiangyong;Luo, Haosu;
7:1:22:17     Contribution of intermediate submicrometer structures to physical properties near T-c in Pb(Zn1/3Nb2/3)O-3-9%PbTiO3
DOI:10.1103/PhysRevB.83.224115  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Ohwada, Kenji;Mizuki, Jun'ichiro;Namikawa, Kazumichi;Matsushita, Mitsuyoshi;Shimomura, Susumu;Nakao, Hironori;Hirota, Kazuma;
7:1:22:18     Elastic softening and polarization memory in PZN-PT relaxor ferroelectrics
DOI:10.1103/PhysRevB.84.174124  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Farnsworth, S. M.;Kisi, E. H.;Carpenter, M. A.;
7:1:22:19     Heterophase fluctuations near T-c in the relaxor ferroelectrics (1-x)Pb(Zn1/3Nb2/3)O-3-xPbTiO(3) (x=0.09) studied by x-ray diffuse scattering and coherent x-ray scattering
DOI:10.1103/PhysRevB.90.104109  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ohwada, Kenji;Mizuki, Jun'ichiro;Matsushita, Mitsuyoshi;Namikawa, Kazumichi;
7:1:22:20     Soft-mode dynamics in micrograin and nanograin ceramics of strontium titanate observed by hyper-Raman scattering
DOI:10.1103/PhysRevB.87.014303  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Hehlen, B.;Al-Zein, A.;Bogicevic, C.;Gemeiner, P.;Kiat, J-M.;
7:1:22:21     Successive Pressure-Induced Structural Transitions in Relaxor Lead Indium Niobate
DOI:10.1080/00150193.2014.932606  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Ahart, Muhtar;Kojima, Seiji;Yasuda, Naohiko;Hemley, Russell J.;
7:1:22:22     Hyper-Raman scattering: New prospects for the description of the local structure of complex perovskites
DOI:10.1063/1.3599863  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Al-Zein, A.;Hlinka, J.;Rouquette, J.;Kania, A.;Hehlen, B.;
7:1:22:23     Anelastic relaxor behavior of Pb(Mg1/3Nb2/3)O-3
DOI:10.1063/1.4818665  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Ursic, Hana;Damjanovic, Dragan;
7:1:22:24     Diffuse scattering anisotropy and inhomogeneous lattice deformations in the lead magnoniobate relaxor PMN above the Burns temperature
DOI:10.1103/PhysRevB.85.094108  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Burkovsky, R. G.;Filimonov, A. V.;Rudskoy, A. I.;Hirota, K.;Matsuura, M.;Vakhrushev, S. B.;
7:1:22:25     Anharmonic atomic vibrations in the relaxor ferroelectric Pb(Mg1/3Nb2/3)O-3 under pressure
DOI:10.1103/PhysRevB.86.174108  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Yamanaka, Takamitsu;Ahart, Muhtar;Nakamoto, Yuki;Ye, Zuo-Guang;Gramsch, Stephen A.;Mao, Ho-kwang;Hemley, Russell J.;
7:1:22:26     Anisotropic phonon coupling in the relaxor ferroelectric (Na1/2Bi1/2)TiO3 near its high-temperature phase transition
DOI:10.1103/PhysRevB.90.054118  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Cai, Ling;Toulouse, Jean;Luo, Haosu;Tian, Wei;
7:1:22:27     Thermal and Electric Field Hysteresis Effects in Structuraly Disordered Ferroelectric Materials
DOI:10.1080/00150193.2010.505542  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Kutnjak, Z.;
7:1:22:28     Fractal Dynamics in a Single Crystal of a Relaxor Ferroelectric
DOI:10.1103/PhysRevLett.109.197601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:2  AU: Koreeda, Akitoshi;Taniguchi, Hiroki;Saikan, Seishiro;Itoh, Mitsuru;
7:1:22:29     Pressure dependence of the monoclinic phase in (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions
DOI:10.1103/PhysRevB.86.224111  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;
7:1:22:30     Freezing of the local dynamics in the relaxor ferroelectric [Pb(Zn1/3Nb2/3)O-3](0.955)[PbTiO3](0.045)
DOI:10.1103/PhysRevB.86.144106  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Xu, Zhijun;Wen, Jinsheng;Mamontov, E.;Stock, C.;Gehring, P. M.;Xu, Guangyong;
7:1:22:31     Origins of large enhancement in electromechanical coupling for nonpolar directions in ferroelectric BaTiO3
DOI:10.1103/PhysRevB.88.180101  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Pramanick, A.;Diallo, S. O.;Delaire, O.;Calder, S.;Christianson, A. D.;Wang, X-L;Fernandez-Baca, J. A.;
7:1:22:32     Paraelectric and ferroelectric states in a model for relaxor ferroelectrics
DOI:10.1103/PhysRevB.88.134106  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Guzman-Verri, G. G.;Littlewood, P. B.;Varma, C. M.;
7:1:22:33     Acute and obtuse rhombohedrons in the local structures of relaxor ferroelectric Pb(Mg1/3Nb2/3)O-3
DOI:10.1103/PhysRevB.89.140103  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Hu, Wen;Hayashi, Kouichi;Ohwada, Kenji;Chen, Jun;Happo, Naohisa;Hosokawa, Shinya;Takahasi, Masamitu;Bokov, Alexei A.;Ye, Zuo-Guang;
7:1:22:34     Computational Studies of Lead-based Relaxor Ferroelectrics
DOI:10.1080/00150193.2014.948341  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Takenaka, Hiroyuki;Grinberg, Ilya;Shin, Young-Han;Rappe, Andrew M.;
7:1:22:35     Thermal Response at the Dipolar-Glass to Ferroelectric Transition in Structuraly Disordered Ferroelectric Materials
DOI:10.1080/00150193.2012.671745  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Novak, N.;Rozic, B.;Holc, J.;Kosec, M.;Pirc, R.;Kutnjak, Z.;
7:1:22:36     Low Energy Phonon Excitations in Relaxor Ferroelectric (1-x)Pb(Zn1/3Nb2/3)O-3-xPbTiO(3)
DOI:10.1080/10584587.2013.778745  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:1  AU: Wongratanaphisan, D.;Toulouse, J.;
7:1:22:37     Inelastic and Quasielastic Neutron Scattering in PbMg1/3Nb2/3O3 Above the Burns Temperature
DOI:10.1080/00150193.2010.505858  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Burkovsky, R.;Vakhrushev, S. B.;Shapiro, S. M.;Ivanov, A.;Hirota, K.;Matsuura, M.;
7:1:22:38     Extent and feature of lattice distortions around Ga impurity atoms in InSb single crystal
DOI:10.1103/PhysRevB.87.094104  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Hosokawa, S.;Happo, N.;Ozaki, T.;Ikemoto, H.;Shishido, T.;Hayashi, K.;
7:1:22:39     Investigation of a relationship between dielectric peak diffuseness and elastic modulus variations in a ferroelectric relaxor
DOI:10.1063/1.4869200  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Sarasua, L. G.;Moreno, A.;Favre, S.;Eiras, J. A.;
7:1:22:40     Power-Law Quasielastic Light Scattering Observed in Relaxor Pb(Mg1/3Nb2/3)O-3
DOI:10.1080/00150193.2011.577365  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Koreeda, Akitoshi;Saikan, Seishiro;Taniguchi, Hiroki;Itoh, Mitsuru;
7:1:22:41     Low Energy Phonon Excitations in Relaxor Ferroelectric (1-x) Pb(Zn1/3Nb2/3)O3-xPbTiO3 (vol 141, pg 72, 2013)
DOI:10.1080/10584587.2014.940250  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Wongratanaphisan, D.;Toulouse, J.;
7:1:23:1     Advanced materials for solid-state refrigeration
DOI:10.1039/c3ta01289a  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2013
  TC:49  AU: Manosa, Lluis;Planes, Antoni;Acet, Mehmet;
7:1:23:2     Caloric Effects in Ferroic Materials: New Concepts for Cooling
DOI:10.1002/adem.201100178  JN:ADVANCED ENGINEERING MATERIALS  PY:2012
  TC:47  AU: Faehler, Sebastian;Roessler, Ulrich K.;Kastner, Oliver;Eckert, Juergen;Eggeler, Gunther;Emmerich, Heike;Entel, Peter;Mueller, Stefan;Quandt, Eckhard;Albe, Karsten;
7:1:23:3     Large temperature span and giant refrigerant capacity in elastocaloric Cu-Zn-Al shape memory alloys
DOI:10.1063/1.4832339  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Manosa, Lluis;Jarque-Farnos, Segio;Vives, Eduard;Planes, Antoni;
7:1:23:4     Demonstration of high efficiency elastocaloric cooling with large Delta T using NiTi wires
DOI:10.1063/1.4746257  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:18  AU: Cui, Jun;Wu, Yiming;Muehlbauer, Jan;Hwang, Yunho;Radermacher, Reinhard;Fackler, Sean;Wuttig, Manfred;Takeuchi, Ichiro;
7:1:23:5     Large entropy change associated with the elastocaloric effect in polycrystalline Ni-Mn-Sb-Co magnetic shape memory alloys
DOI:10.1063/1.4904419  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Millan-Solsona, Ruben;Stern-Taulats, Enric;Vives, Eduard;Planes, Antoni;Sharma, Jyoti;Nayak, Ajaya K.;Suresh, K. G.;Manosa, Lluis;
7:1:23:6     Caloric effects induced by magnetic and mechanical fields in a Ni50Mn25-xGa25Cox magnetic shape memory alloy
DOI:10.1103/PhysRevB.83.174109  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Castillo-Villa, P. O.;Soto-Parra, D. E.;Matutes-Aquino, J. A.;Ochoa-Gamboa, R. A.;Planes, Antoni;Manosa, Lluis;Gonzalez-Alonso, David;Stipcich, Marcelo;Romero, Ricardo;Rios-Jara, D.;Flores-Zuniga, H.;
7:1:23:7     High cyclic stability of the elastocaloric effect in sputtered TiNiCu shape memory films
DOI:10.1063/1.4748307  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Bechtold, C.;Chluba, C.;De Miranda, R. Lima;Quandt, E.;
7:1:23:8     Elastocaloric effect in a textured polycrystalline Ni-Mn-In-Co metamagnetic shape memory alloy
DOI:10.1063/1.4899147  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Lu, Binfeng;Xiao, Fei;Yan, Aru;Liu, Jian;
7:1:23:9     Barocaloric effect in the magnetocaloric prototype Gd5Si2Ge2
DOI:10.1063/1.4745920  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:15  AU: Yuce, Suheyla;Barrio, Maria;Emre, Bans;Stern-Taulats, Enric;Planes, Antoni;Tamarit, Josep-Lluis;Mudryk, Yaroslav;Gschneidner, Karl A., Jr.;Pecharsky, Vitalij K.;Manosa, Lluis;
7:1:23:10     Stress- and magnetic field-induced entropy changes in Fe-doped Ni-Mn-Ga shape-memory alloys
DOI:10.1063/1.3309755  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Soto-Parra, D. E.;Vives, Eduard;Gonzalez-Alonso, David;Manosa, Lluis;Planes, Antoni;Romero, Ricardo;Matutes-Aquino, J. A.;Ochoa-Gamboa, R. A.;Flores-Zuniga, H.;
7:1:23:11     Significant elastocaloric effect in a Fe-31.2Pd (at. %) single crystal
DOI:10.1063/1.4803168  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:11  AU: Xiao, Fei;Fukuda, Takashi;Kakeshita, Tomoyuki;
7:1:23:12     Evolution of temperature profiles in TiNi films for elastocaloric cooling
DOI:10.1016/j.actamat.2014.08.006  JN:ACTA MATERIALIA  PY:2014
  TC:8  AU: Ossmer, H.;Lambrecht, F.;Gueltig, M.;Chluba, C.;Quandt, E.;Kohl, M.;
7:1:23:13     Temperature contour maps at the strain-induced martensitic transition of a Cu-Zn-Al shape-memory single crystal
DOI:10.1063/1.3533403  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Vives, Eduard;Burrows, Susan;Edwards, Rachel S.;Dixon, Steve;Manosa, Lluis;Planes, Antoni;Romero, Ricardo;
7:1:23:14     Thermodynamics of multicaloric effects in multiferroics
DOI:10.1080/14786435.2014.899438  JN:PHILOSOPHICAL MAGAZINE  PY:2014
  TC:5  AU: Planes, A.;Castan, T.;Saxena, A.;
7:1:23:15     Elastocaloric and magnetocaloric effects in Ni-Mn-Sn(Cu) shape-memory alloy
DOI:10.1063/1.4790140  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:9  AU: Castillo-Villa, Pedro O.;Manosa, Lluis;Planes, Antoni;Soto-Parra, Daniel E.;Sanchez-Llamazares, J. L.;Flores-Zuniga, H.;Frontera, Carlos;
7:1:23:16     Shape Memory Response in Ni40Co10Mn33Al17 Polycrystalline Alloy
DOI:10.2320/matertrans.MBW200903  JN:MATERIALS TRANSACTIONS  PY:2010
  TC:4  AU: Ito, Wataru;Basaran, Burak;Umetsu, Rie Y.;Karaman, Ibrahim;Kainuma, Ryosuke;Ishida, Kiyohito;
7:1:23:17     Effects of Ti content on microstructure and shape memory behavior of TixNi(84.5-x)Cu15.5 (x=44.6-55.4) thin films
DOI:10.1016/j.actamat.2014.02.006  JN:ACTA MATERIALIA  PY:2014
  TC:3  AU: Ishida, Akira;Sato, Mono;Gao, Zhiyong;
7:1:23:18     Caloric effects and phase transitions in ferromagnetic-ferroelectric composites xLa(0.7)Pb(0.3)MnO(3)-(1-x)PbTiO3
DOI:10.1557/jmr.2013.360  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:3  AU: Mikhaleva, Ekaterina;Flerov, Igor;Kartashev, Andrey;Gorev, Mikhail;Cherepakhin, Alexander;Sablina, Klara;Mikhashenok, Nataly;Volkov, Nikita;Shabanov, Alexander;
7:1:23:19     On the physical nature of high reversible strain in Fe-Pd single crystals exhibiting lattice softening
DOI:10.1016/j.actamat.2013.03.025  JN:ACTA MATERIALIA  PY:2013
  TC:4  AU: Xiao, Fei;Fukuda, Takashi;Kakeshita, Tomoyuki;
7:1:23:20     Micropatterned Freestanding Superelastic TiNi Films
DOI:10.1002/adem.201200197  JN:ADVANCED ENGINEERING MATERIALS  PY:2013
  TC:4  AU: de Miranda, Rodrigo Lima;Zamponi, Christiane;Quandt, Eckhard;
7:1:23:21     Formation of B19 ' martensite in annealed Ti44.6Ni40.1Cu15.3 thin films and their shape recovery characteristic
DOI:10.1016/j.jallcom.2010.06.020  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:3  AU: Gao, Z. Y.;Sato, M.;Ishida, A.;
7:1:24:1     Effect of 90 degrees Domain Walls on the Low-Field Permittivity of PbZr0.2Ti0.8O3 Thin Films
DOI:10.1103/PhysRevLett.108.167601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:13  AU: Karthik, J.;Damodaran, A. R.;Martin, L. W.;
7:1:24:2     Effect of 90 degrees Domain Walls and Thermal Expansion Mismatch on the Pyroelectric Properties of Epitaxial PbZr0.2Ti0.8O3 Thin Films
DOI:10.1103/PhysRevLett.109.257602  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:13  AU: Karthik, J.;Agar, J. C.;Damodaran, A. R.;Martin, L. W.;
7:1:24:3     Epitaxial Ferroelectric Heterostructures Fabricated by Selective Area Epitaxy of SrRuO3 Using an MgO Mask
DOI:10.1002/adma.201104697  JN:ADVANCED MATERIALS  PY:2012
  TC:21  AU: Karthik, J.;Damodaran, Anoop R.;Martin, Lane W.;
7:1:24:4     Pyroelectric properties of polydomain epitaxial Pb(Zr1-x, Ti-x)O-3 thin films
DOI:10.1103/PhysRevB.84.024102  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Karthik, J.;Martin, L. W.;
7:1:24:5     Reduction of the electrocaloric entropy change of ferroelectric PbZr1-xTixO3 epitaxial layers due to an elastocaloric effect
DOI:10.1103/PhysRevB.90.094116  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Trong Tong;Karthik, J.;Mangalam, R. V. K.;Martin, Lane W.;Cahill, David G.;
7:1:24:6     Improved Pyroelectric Figures of Merit in Compositionally Graded PbZr1-x,TixO3 Thin Films
DOI:10.1021/am404228c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:9  AU: Mangalam, R. V. K.;Agar, J. C.;Damodaran, A. R.;Karthik, J.;Martin, L. W.;
7:1:24:7     Domain evolution of tetragonal Pb(ZrxTi1-x) O-3 piezoelectric thin films on SrTiO3 (100) surfaces: combined effects of misfit strain and Zr/Ti ratio
DOI:10.1039/c4tc00643g  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:2  AU: Yu, Qi;Li, Jing-Feng;Zhu, Fang-Yuan;Li, Jiangyu;
7:1:24:8     Large built-in electric fields due to flexoelectricity in compositionally graded ferroelectric thin films
DOI:10.1103/PhysRevB.87.024111  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Karthik, J.;Mangalam, R. V. K.;Agar, J. C.;Martin, L. W.;
7:1:24:9     Understanding order in compositionally graded ferroelectrics: Flexoelectricity, gradient, and depolarization field effects
DOI:10.1103/PhysRevB.89.224101  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Zhang, J.;Xu, R.;Damodaran, A. R.;Chen, Z. -H.;Martin, L. W.;
7:1:24:10     Unexpected Crystal and Domain Structures and Properties in Compositionally Graded PbZr1-xTixO3 Thin Films
DOI:10.1002/adma.201204240  JN:ADVANCED MATERIALS  PY:2013
  TC:12  AU: Mangalam, R. V. K.;Karthik, J.;Damodaran, Anoop R.;Agar, Joshua C.;Martin, Lane W.;
7:1:24:11     Field emission from nanometer-scale tips of crystalline PbZrxTi1-xO3
DOI:10.1116/1.4793219  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:3  AU: Fletcher, Patrick C.;Mangalam, Vengadesh Kumara R.;Martin, Lane W.;King, William P.;
7:1:24:12     Secondary effects in wide frequency range measurements of the pyroelectric coefficient of Ba0.6Sr0.4TiO3 and PbZr0.2Ti0.8O3 epitaxial layers
DOI:10.1103/PhysRevB.90.155423  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Trong Tong;Karthik, J.;Martin, Lane W.;Cahill, David G.;
7:1:24:13     Giant pyroelectric coefficient determined from the frequency dependence of the pyroelectric signal generated by epitaxial Pb(Zr0.2Ti0.8)O-3 layers grown on single crystal SrTiO3 substrates
DOI:10.1063/1.4838035  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Botea, M.;Iuga, A.;Pintilie, L.;
7:1:24:14     High-frequency thermal-electrical cycles for pyroelectric energy conversion
DOI:10.1063/1.4901993  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Bhatia, Bikram;Damodaran, Anoop R.;Cho, Hanna;Martin, Lane W.;King, William P.;
7:1:24:15     Scale Effects of Low-Dimensional Relaxor Ferroelectric Single Crystals and Their Application in Novel Pyroelectric Infrared Detectors
DOI:10.1002/adma.201304546  JN:ADVANCED MATERIALS  PY:2014
  TC:3  AU: Li, Long;Zhao, Xiangyong;Li, Xiaobing;Ren, Bo;Xu, Qing;Liang, Zhu;Di, Wenning;Yang, Linrong;Luo, Haosu;Shao, Xiumei;Fang, Jiaxiong;Neumann, Norbert;Jiao, Jie;
7:1:24:16     Pyroelectric electron emission from nanometer-thick films of PbZrxTi1-xO3
DOI:10.1063/1.4806973  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Fletcher, Patrick C.;Mangalam, Vengadesh Kumara R.;Martin, Lane W.;King, William P.;
7:1:24:17     Pyroelectric current measurements on PbZr0.2Ti0.8O3 epitaxial layers
DOI:10.1063/1.4766271  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Bhatia, B.;Karthik, J.;Tong, T.;Cahill, David G.;Martin, L. W.;King, W. P.;
7:1:24:18     Local 90 degrees switching in Pb(Zr0.2Ti0.8)O-3 thin film: Phase-field modeling
DOI:10.1016/j.actamat.2014.03.071  JN:ACTA MATERIALIA  PY:2014
  TC:0  AU: Hong, Zijian;Britson, Jason;Hu, Jia-Mian;Chen, Long-Qing;
7:1:24:19     Enhancement of pyroelectric signal by continuous ultraviolet illumination of epitaxial Pb(Zr0.2Ti0.8)O-3 films
DOI:10.1063/1.4896855  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Pintilie, L.;Botea, M.;Iuga, A.;
7:1:24:20     Mobile Ferroelastic Domain Walls in Nanocrystalline PZT Films: the Direct Piezoelectric Effect
DOI:10.1002/adfm.201100445  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:7  AU: Zednik, Ricardo J.;Varatharajan, Anbusathaiah;Oliver, Mark;Valanoor, Nagarajan;McIntyre, Paul C.;
7:1:24:21     Stress impact on dielectric properties of Bi3.15Nd0.85Ti3O12 films
DOI:10.1063/1.3302460  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Liu, Yunfei;Kan, Yi;Lu, Xiaomei;Cai, Wei;Wu, Xiaobo;Wu, Xiumei;Wang, Xiaofei;Bo, HuiFeng;Huang, Fengzhen;Zhu, Jinsong;
7:1:24:22     Corrected field enhancement factor for the floating sphere model of carbon nanotube emitter
DOI:10.1063/1.3466992  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Pogorelov, Evgeny G.;Chang, Yia-Chung;Zhbanov, Alexander I.;Lee, Yong-Gu;
7:1:24:23     High-temperature piezoresponse force microscopy
DOI:10.1063/1.3652771  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Bhatia, B.;Karthik, J.;Cahill, D. G.;Martin, L. W.;King, W. P.;
7:1:25:1     Piezoelectric properties and temperature stabilities of Mn- and Cu-modified BiFeO3-BaTiO3 high temperature ceramics
DOI:10.1016/j.jeurceramsoc.2012.11.019  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:32  AU: Yang, Huabin;Zhou, Changrong;Liu, Xinyu;Zhou, Qin;Chen, Guohua;Li, Weizhou;Wang, Hua;
7:1:25:2     Temperature Dependence of Dielectric/Piezoelectric Properties of (1-x)Bi(Mg1/2Ti1/2)O-3-xPbTiO(3) Ceramics with an MPB Composition
DOI:10.1111/j.1551-2916.2010.03860.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:30  AU: Zhang, Qiang;Li, Zhenrong;Li, Fei;Xu, Zhuo;Yao, Xi;
7:1:25:3     Temperature Dependence of the Piezoelectric Coefficient in BiMeO3-PbTiO3 (Me = Fe, Sc, (Mg1/2Ti1/2)) Ceramics
DOI:10.1111/j.1551-2916.2011.04848.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:24  AU: Leist, Thorsten;Chen, Jun;Jo, Wook;Aulbach, Emil;Suffner, Jens;Roedel, Juergen;
7:1:25:4     Remarkably high-temperature stable piezoelectric properties of Bi(Mg0.5Ti0.5)O-3 modified BiFeO3-BaTiO3 ceramics
DOI:10.1063/1.4736724  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:25  AU: Zhou, Changrong;Feteira, Antonio;Shan, Xu;Yang, Huabin;Zhou, Qin;Cheng, Jun;Li, Weizhou;Wang, Hua;
7:1:25:5     Structural, microstructural and electrical properties of BiFeO3-BaTiO3 ceramics with high thermal stability
DOI:10.1016/j.materresbull.2012.09.027  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:16  AU: Yang, Huabin;Zhou, Changrong;Liu, Xinyu;Zhou, Qin;Chen, Guohua;Wang, Hua;Li, Weizhou;
7:1:25:6     Large piezoelectric properties induced by doping ionic pairs in BaTiO3 ceramics
DOI:10.1016/j.actamat.2014.07.023  JN:ACTA MATERIALIA  PY:2014
  TC:2  AU: Xu, D.;Li, W. L.;Wang, L. D.;Wang, W.;Cao, W. P.;Fei, W. D.;
7:1:25:7     Dielectric, Ferroelectric, and Piezoelectric Properties of Bi(Ni1/2Ti1/2)O3-Modified BiFeO3-BaTiO3 Ceramics with High Curie Temperature
DOI:10.1111/j.1551-2916.2012.05387.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:17  AU: Zhou, Qin;Zhou, Changrong;Yang, Huabin;Chen, Guohua;Li, Weizhou;Wang, Hua;
7:1:25:8     Effect of Zr4+ substitution on thermal stability and electrical properties of high temperature BiFe0.99Al0.01O3-BaTi1-xZrxO3 ceramics
DOI:10.1016/j.jallcom.2013.03.065  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Cen, Zhenyong;Zhou, Changrong;Cheng, Jun;Zhou, Xiujuan;Li, Weizhou;Yan, Chunle;Feng, Songlin;Liu, Yueqiang;Lao, Daosong;
7:1:25:9     Origin and magnitude of the large piezoelectric response in the lead-free (1-x)BiFeO3-xBaTiO(3) solid solution
DOI:10.1557/jmr.2010.44  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:20  AU: Leontsev, Serhiy O.;Eitel, Richard E.;
7:1:25:10     Doping of BiScO3-PbTiO3 Ceramics for Enhanced Properties
DOI:10.1111/j.1551-2916.2010.03648.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:19  AU: Sehirlioglu, Alp;Sayir, Ali;Dynys, Fred;
7:1:25:11     Bi(Zn1/2Ti1/2)O-3 modified BiFeO3-BaTiO3 lead-free piezoelectric ceramics with high temperature stability
DOI:10.1016/j.ceramint.2013.01.110  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Shan, Xu;Zhou, Changrong;Cen, Zhenyong;Yang, Huabin;Zhou, Qin;Li, Weizhou;
7:1:25:12     Investigation of Structural and Electrical Properties of B-Site Complex Ion (Mg1/3Nb2/3)(4+)-Modified High-Curie-Temperature BiFeO3-BaTiO3 Ceramics
DOI:10.1007/s11664-013-2952-x  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:1  AU: Zhou, Xiujuan;Zhou, Changrong;Zhou, Qin;Yang, Huabin;Cen, Zhenyong;Cheng, Jun;Cao, Lei;Fan, Qiaolan;
7:1:25:13     Remarkably High-Temperature Stability of Bi(Fe1-xAlx)O3-BaTiO3 Solid Solution with Near-Zero Temperature Coefficient of Piezoelectric Properties
DOI:10.1111/jace.12326  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Cen, Zhenyong;Zhou, Changrong;Yang, Huabin;Zhou, Qin;Li, Weizhou;Yan, Chunle;Cao, Lei;Song, Jun;Peng, Ling;
7:1:25:14     Piezoelectric properties of Fe2O3 doped BiYbO3-Pb(Zr,Ti)O-3 high Curie temperature ceramics
DOI:10.1016/j.ceramint.2013.10.043  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Shi, Liang;Zhang, Boping;Liao, Qingwei;Zhu, Lifeng;Zhao, Lei;Zhang, Daibing;Guo, Dong;
7:1:25:15     Dielectric, ferroelectric and piezoelectric properties of La-substituted BiFeO3-BaTiO3 ceramics
DOI:10.1016/j.ceramint.2012.11.012  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Zhou, Changrong;Yang, Huabin;Zhou, Qin;Cen, Zhenyong;Li, Weizhou;Yuan, Changlai;Wang, Hua;
7:1:25:16     Enhanced thermal stability of lead-free high temperature 0.75BiFeO(3)-0.25BaTiO(3) ceramics with excess Bi content
DOI:10.1016/j.jallcom.2013.11.169  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Chen, Jianguo;Cheng, Jinrong;
7:1:25:17     Marked increase in Curie temperature upon annealing of ferroelectric KF-substituted barium titanate
DOI:10.1016/j.scriptamat.2010.10.007  JN:SCRIPTA MATERIALIA  PY:2011
  TC:3  AU: Tsukada, Shinya;Akishige, Yukikuni;
7:1:25:18     Effects of sintering atmosphere on microstructure and electrical properties of BiScO3-PbTiO3 high-temperature piezoceramics
DOI:10.1016/j.jallcom.2012.02.092  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Cai, Zeyong;Wang, Genshui;Yu, Gang;Huang, Zhen;Cao, Fei;Dong, Xianlin;
7:1:25:19     Ar-Annealing Effects on T-C in KF-Substituted Barium Titanate
DOI:10.1080/00150193.2011.577341  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Tsukada, Shinya;Hiraki, Yuuta;Hada, Akinori;Akishige, Yukikuni;
7:1:25:20     Enhancing the properties of high-temperature BiScO3-PbTiO3 piezoceramics via Bi addition
DOI:10.1016/j.materresbull.2013.04.060  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:2  AU: Shang, Xunzhong;Liu, Heng;Guo, Jinming;Jiang, Dan;Zhou, Taosheng;He, Yunbin;
7:1:25:21     Phase transition in (1-x)Bi(Mg1/2Ti1/2)O-3-xPbTiO(3) ceramics
DOI:10.1016/j.matlet.2011.06.078  JN:MATERIALS LETTERS  PY:2011
  TC:1  AU: Zhang, Qiang;Li, Zhenrong;Xu, Zhuo;
7:1:25:22     Synthesis, characterization and electrical properties of sol-gel derived 0.63Bi(Mg1/2Ti1/2)O-3-0.37PbTiO(3) high-T-c piezoelectric ceramics
DOI:10.1016/j.matchemphys.2012.04.017  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:0  AU: Ji, Xun;Zuo, Ruzhong;Qi, Shishun;Liu, Longdong;
7:1:26:1     Processing Technologies for High-Permittivity Thin Films in Capacitor Applications
DOI:10.1111/j.1551-2916.2010.04211.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:42  AU: Brennecka, Geoff L.;Ihlefeld, Jon F.;Maria, Jon-Paul;Tuttle, Bruce A.;Clem, Paul G.;
7:1:26:2     Chemically Homogeneous Complex Oxide Thin Films Via Improved Substrate Metallization
DOI:10.1002/adfm.201103077  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:26  AU: Shelton, Christopher T.;Kotula, Paul G.;Brennecka, Geoff L.;Lam, Peter G.;Meyer, Kelsey E.;Maria, Jon-Paul;Gibbons, Brady J.;Ihlefeld, Jon F.;
7:1:26:3     Thin-film piezoelectric MEMS
DOI:10.1557/mrs.2012.273  JN:MRS BULLETIN  PY:2012
  TC:29  AU: Eom, Chang-Beom;Trolier-McKinstry, Susan;
7:1:26:4     Permittivity scaling in Ba1-xSrxTiO3 thin films and ceramics
DOI:10.1063/1.3514127  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:17  AU: Ayguen, Seymen M.;Ihlefeld, Jon F.;Borland, William J.;Maria, Jon-Paul;
7:1:26:5     Quantifying Compositional Homogeneity in Pb(Zr,Ti)O-3 Using Atom Probe Tomography
DOI:10.1111/jace.13135  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Kirchhofer, Rita;Diercks, David R.;Gorman, Brian P.;Ihlefeld, Jon F.;Kotula, Paul G.;Shelton, Christopher T.;Brennecka, Geoff L.;
7:1:26:6     In situ x-ray diffraction of solution-derived ferroelectric thin films for quantitative phase and texture evolution measurement
DOI:10.1063/1.4766387  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Nittala, Krishna;Mhin, Sungwook;Jones, Jacob L.;Robinson, Douglas S.;Ihlefeld, Jon F.;Brennecka, Geoff L.;
7:1:26:7     Dielectric and ferroelectric properties of (Bi0.5Na0.5)TiO3-(Bi0.5K0.5) TiO3-BaTiO3 thin films deposited via chemical solution deposition
DOI:10.1016/j.matlet.2013.04.096  JN:MATERIALS LETTERS  PY:2013
  TC:6  AU: Jeon, Yu Hong;Patterson, Eric A.;Cann, David P.;Gibbons, Brady J.;
7:1:26:8     Optimization of PbTiO3 seed layers and Pt metallization for PZT-based piezoMEMS actuators
DOI:10.1557/jmr.2013.172  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:10  AU: Sanchez, Luz M.;Potrepka, Daniel M.;Fox, Glen R.;Takeuchi, Ichiro;Wang, Ke;Bendersky, Leonid A.;Polcawich, Ronald G.;
7:1:26:9     Spectral phonon scattering effects on the thermal conductivity of nano-grained barium titanate
DOI:10.1063/1.4893920  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Donovan, Brian F.;Foley, Brian M.;Ihlefeld, Jon F.;Maria, Jon-Paul;Hopkins, Patrick E.;
7:1:26:10     Property engineering in BaTiO3 films by stoichiometry control
DOI:10.1557/JMR.2010.0151  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:9  AU: Ihlefeld, J. F.;Daniels, P. R.;Aygun, S. M.;Borland, W. J.;Maria, J-P.;
7:1:26:11     Ultra-high tunability in polycrystalline Ba1-xSrxTiO3 thin films
DOI:10.1063/1.4893615  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Harris, D. T.;Lam, P. G.;Burch, M. J.;Li, J.;Rogers, B. J.;Dickey, E. C.;Maria, J. -P.;
7:1:26:12     Phase and texture evolution in solution deposited lead zirconate titanate thin films: Formation and role of the Pt3Pb intermetallic phase
DOI:10.1063/1.4811687  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Nittala, Krishna;Mhin, Sungwook;Dunnigan, Katherine M.;Robinson, Douglas S.;Ihlefeld, Jon F.;Kotula, Paul G.;Brennecka, Geoff L.;Jones, Jacob L.;
7:1:26:13     Dysprosium-Doped (Ba,Sr)TiO3 Thin Films on Nickel Foilsfor Capacitor Applications
DOI:10.1111/jace.12182  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Bretos, Inigo;Schneller, Theodor;Waser, Rainer;Hennings, Detlev F.;Park, Daesung;Weirich, Thomas;
7:1:26:14     In situ methods to explore microstructure evolution in chemically derived oxide thin films
DOI:10.1557/JMR.2010.0066  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:6  AU: Aygun, Seymen M.;Daniels, Patrick;Borland, William J.;Maria, Jon-Paul;
7:1:26:15     Mechanisms for microstructure enhancement in flux-assisted growth of barium titanate on sapphire
DOI:10.1557/jmr.2014.59  JN:JOURNAL OF MATERIALS RESEARCH  PY:2014
  TC:3  AU: Burch, Matthew J.;Li, Jing;Harris, David T.;Maria, Jon-Paul;Dickey, Elizabeth C.;
7:1:26:16     Effect of Switching Atmospheric Conditions during Crystallization on the Phase Evolution of Solution-Derived Lead Zirconate Titanate Thin Films
DOI:10.1111/jace.12522  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Mhin, Sungwook;Cozzan, Clayton;Nittala, Krishna;Wanninkhof, Patrick;Ihlefeld, Jon F.;Brennecka, Geoff L.;Jones, Jacob L.;
7:1:26:17     Phase and Texture Evolution in Chemically Derived PZT Thin Films on Pt Substrates
DOI:10.1111/jace.13007  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Mhin, Sungwook;Nittala, Krishna;Lee, Jinhyung;Robinson, Douglas S.;Ihlefeld, Jon F.;Brennecka, Geoff L.;Sanchez, Luz M.;Polcawich, Ronald G.;Jones, Jacob L.;
7:1:26:18     Epitaxial Pb(Zr,Ti)O-3 Thin Films on Flexible Substrates
DOI:10.1111/j.1551-2916.2011.04811.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Shelton, Christopher T.;Gibbons, Brady J.;
7:1:26:19     Realizing strain enhanced dielectric properties in BaTiO3 films by liquid phase assisted growth
DOI:10.1063/1.4813270  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Harris, David T.;Burch, Matthew J.;Ihlefeld, Jon F.;Lam, Peter G.;Li, Jing;Dickey, Elizabeth C.;Maria, Jon-Paul;
7:1:26:20     {001} Oriented piezoelectric films prepared by chemical solution deposition on Ni foils
DOI:10.1063/1.4886597  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Yeo, Hong Goo;Trolier-McKinstry, Susan;
7:1:26:21     High Piezoelectric Longitudinal Coefficients in Sol-gel PZT Thin Film Multilayers
DOI:10.1111/jace.12894  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Balma, Davide;Mazzalai, Andrea;Chidambaram, Nachiappan;Sandu, Cosmin S.;Neels, Antonia;Dommann, Alex;Hess, Peter;Binz, Dieter;Muralt, Paul;
7:1:26:22     Formation Sequence of Lead Platinum Interfacial Phases in Chemical Solution Deposition Derived Pb(Zr1-xTix)O-3 Thin Films
DOI:10.1021/cm101195t  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:4  AU: Dippel, Ann-Christin;Schneller, Theodor;Waser, Rainer;Park, Daesung;Mayer, Joachim;
7:1:26:23     Growth of highly oriented iridium oxide bottom electrode for Pb(Zr,Ti)O-3 thin films using titanium oxide seed layer
DOI:10.1007/s10853-011-5642-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:2  AU: Trupina, L.;Miclea, C.;Amarande, L.;Cioangher, M.;
7:1:26:24     Piezoelectric PZT MEMS technologies for small-scale robotics and RF applications
DOI:10.1557/mrs.2012.269  JN:MRS BULLETIN  PY:2012
  TC:10  AU: Pulskamp, Jeffrey S.;Polcawich, Ronald G.;Rudy, Ryan Q.;Bedair, Sarah S.;Proie, Robert M.;Ivanov, Tony;Smith, Gabriel L.;
7:1:27:1     Relaxor-like behavior of BaTiO3 crystals from acoustic emission study
DOI:10.1063/1.3464968  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:31  AU: Dul'kin, E.;Petzelt, J.;Kamba, S.;Mojaev, E.;Roth, M.;
7:1:27:2     Local structural phenomena in pure and Ru-doped 0.9PbZn(1/3)Nb(2/3)O(3)-0.1PbTiO(3) near the morphotropic phase boundary as revealed by Raman spectroscopy
DOI:10.1103/PhysRevB.83.214104  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Waeselmann, N.;Mihailova, B.;Maier, B. J.;Paulmann, C.;Gospodinov, M.;Marinova, V.;Bismayer, U.;
7:1:27:3     Ferroelectric precursor behavior of highly cation-ordered PbSc0.5Ta0.5O3 detected by acoustic emission: Tweed and polar nanoregions
DOI:10.1063/1.4902511  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Dul'kin, Evgeniy;Salje, Ekhard K. H.;Aktas, Oktay;Whatmore, Roger W.;Roth, Michael;
7:1:27:4     Phase transformation above T-m in PbSc0.5Ta0.5O3 relaxor as seen via acoustic emission
DOI:10.1103/PhysRevB.82.180101  JN:PHYSICAL REVIEW B  PY:2010
  TC:19  AU: Dul'kin, E.;Mihailova, B.;Catalan, G.;Gospodinov, M.;Roth, M.;
7:1:27:5     Effect of La doping on the ferroic order in Pb-based perovskite-type relaxor ferroelectrics
DOI:10.1103/PhysRevB.83.134106  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Maier, B. J.;Welsch, A. -M.;Mihailova, B.;Angel, R. J.;Zhao, J.;Paulmann, C.;Engel, J. M.;Marshall, W. G.;Gospodinov, M.;Petrova, D.;Bismayer, U.;
7:1:27:6     Effect of A-site La, Ba, and Sr doping on the threshold field and characteristic temperatures of PbSc0.5Nb0.5O3 relaxor studied by acoustic emission
DOI:10.1063/1.4790601  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:9  AU: Dul'kin, E.;Mihailova, B.;Gospodinov, M.;Roth, M.;
7:1:27:7     Structural state of relaxor ferroelectrics PbSc0.5Ta0.5O3 and PbSc0.5Nb0.5O3 at high pressures up to 30 GPa
DOI:10.1103/PhysRevB.84.174104  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Maier, B. J.;Waeselmann, N.;Mihailova, B.;Angel, R. J.;Ederer, C.;Paulmann, C.;Gospodinov, M.;Friedrich, A.;Bismayer, U.;
7:1:27:8     Effect of A-site La and Ba doping on threshold field and characteristic temperatures of PbSc0.5Ta0.5O3 relaxor studied by acoustic emission
DOI:10.1063/1.4752400  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Dul'kin, E.;Mihailova, B.;Gospodinov, M.;Roth, M.;
7:1:27:9     High-pressure Brillouin scattering of the single-crystal PbSc1/2Ta1/2O3 relaxor ferroelectric
DOI:10.1103/PhysRevB.87.184113  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Marquardt, H.;Waeselmann, N.;Wehber, M.;Angel, R. J.;Gospodinov, M.;Mihailova, B.;
7:1:27:10     X-ray absorption spectroscopy of Ru-doped relaxor ferroelectrics with a perovskite-type structure
DOI:10.1103/PhysRevB.89.144112  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Vitova, T.;Mangold, S.;Paulmann, C.;Gospodinov, M.;Marinova, V.;Mihailova, B.;
7:1:27:11     Resonance Raman scattering of perovskite-type relaxor ferroelectrics under nonambient conditions
DOI:10.1103/PhysRevB.90.064107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: de la Flor, G.;Wehber, M.;Rohrbeck, A.;Aroyo, M. I.;Bismayer, U.;Mihailova, B.;
7:1:27:12     Pressure-induced structural transformations in pure and Ru-doped 0.9PbZn(1/3)Nb(2/3)O(3)-0.1PbTiO(3) near the morphotropic phase boundary
DOI:10.1103/PhysRevB.85.014106  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Waeselmann, N.;Maier, B. J.;Mihailova, B.;Angel, R. J.;Zhao, J.;Gospodinov, M.;Paulmann, C.;Ross, N.;Bismayer, U.;
7:1:27:13     Influence of electric field on local phase transformations in relaxor ferroelectrics PbSc0.5Ta0.5O3 and Pb0.78Ba0.22Sc0.5Ta0.5O3
DOI:10.1063/1.4770479  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Maier, B. J.;Steilmann, T.;Gospodinov, M.;Bismayer, U.;Mihailova, B.;
7:1:27:14     On the Question about the Burns Temperature in KTa1-xNbxO3 Ferroelectrics
DOI:10.1080/00150193.2014.932139  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Dul'kin, E.;
7:1:27:15     Dielectric maximum temperature non-monotonic behavior in unaxial Sr0.75Ba0.25Nb2O6 relaxor seen via acoustic emission
DOI:10.1063/1.3622670  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Dul'kin, E.;Kojima, S.;Roth, M.;
7:1:27:16     A-site doping-induced renormalization of structural transformations in the PbSc0.5Nb0.5O3 relaxor ferroelectric under high pressure
DOI:10.1103/PhysRevB.81.174116  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Maier, B. J.;Welsch, A. -M.;Angel, R. J.;Mihailova, B.;Zhao, J.;Engel, J. M.;Schmitt, L. A.;Paulmann, C.;Gospodinov, M.;Friedrich, A.;Bismayer, U.;
7:1:27:17     Frequency dependence of the characteristic temperatures in PbSc0.5Ta0.36Nb0.14O3 relaxor ferroelectrics crystals seen via acoustic emission
DOI:10.1063/1.4864036  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Dul'kin, E.;Mihailova, B.;Gospodinov, M.;Roth, M.;
7:1:27:18     Effect of chemically ordered regions on the acoustic behaviors in Pb(Mg1/3Nb2/3)O-3 studied by Brillouin scattering
DOI:10.1063/1.3346405  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Ko, Jae-Hyeon;Kim, Tae Hyun;Kojima, Seiji;Long, Xifa;Bokov, Alexei A.;Ye, Zuo-Guang;
7:1:27:19     Brillouin scattering studies of acoustic phonon modes and central peak in single-crystal Pb(Sc1/2Ta1/2)O-3
DOI:10.1103/PhysRevB.85.054104  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Sivasubramanian, V.;Kojima, S.;
7:1:27:20     Ferroelectric precursor behavior in PbSc0.5Ta0.5O3 detected by field-induced resonant piezoelectric spectroscopy
DOI:10.1103/PhysRevB.88.174112  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:1:27:21     Low temperature anomalous field effect in SrxBa1-xNb2O6 uniaxial relaxor ferroelectric seen via acoustic emission
DOI:10.1063/1.3702888  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Dul'kin, E.;Kojima, S.;Roth, M.;
7:1:27:22     Characterization of lead-based relaxor ferroelectric crystals by acoustic emission
DOI:10.1016/j.optmat.2011.07.032  JN:OPTICAL MATERIALS  PY:2011
  TC:1  AU: Roth, M.;Dul'kin, E.;Mojaev, E.;Tseitlin, M.;
7:1:27:23     Optical beating Brillouin scattering spectroscopic measurements of high-temperature gas
DOI:10.1063/1.3471814  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Minami, Yasuo;Yogi, Takeshi;Sakai, Keiji;
7:1:28:1     Single Crystal Study of Competing Rhombohedral and Monoclinic Order in Lead Zirconate Titanate
DOI:10.1103/PhysRevLett.105.207601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:30  AU: Phelan, D.;Long, X.;Xie, Y.;Ye, Z. -G.;Glazer, A. M.;Yokota, H.;Thomas, P. A.;Gehring, P. M.;
7:1:28:2     Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O-3
DOI:10.1103/PhysRevB.84.184302  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Buixaderas, E.;Nuzhnyy, D.;Petzelt, J.;Jin, Li;Damjanovic, D.;
7:1:28:3     Phase transition behaviors of PbZr1-xTixO3 single crystals as revealed by elastic anomalies and central peaks
DOI:10.1063/1.3688050  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Kim, Tae Hyun;Ko, Jae-Hyeon;Kojima, Seiji;Bokov, Alexei A.;Long, Xifa;Ye, Zuo-Guang;
7:1:28:4     High-resolution x-ray diffraction study of single crystals of lead zirconate titanate
DOI:10.1103/PhysRevB.84.020102  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Gorfman, S.;Keeble, D. S.;Glazer, A. M.;Long, X.;Xie, Y.;Ye, Z-G.;Collins, S.;Thomas, P. A.;
7:1:28:5     Soft antiferroelectric fluctuations in morphotropic PbZr1-xTixO3 single crystals as evidenced by inelastic x-ray scattering
DOI:10.1103/PhysRevB.83.140101  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Hlinka, J.;Ondrejkovic, P.;Kempa, M.;Borissenko, E.;Krisch, M.;Long, X.;Ye, Z. -G.;
7:1:28:6     Structural Heterogeneity and Diffuse Scattering in Morphotropic Lead Zirconate-Titanate Single Crystals
DOI:10.1103/PhysRevLett.109.097603  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:11  AU: Burkovsky, R. G.;Bronwald, Yu. A.;Filimonov, A. V.;Rudskoy, A. I.;Chernyshov, D.;Bosak, A.;Hlinka, J.;Long, X.;Ye, Z. -G.;Vakhrushev, S. B.;
7:1:28:7     Ground state of (Pb0.94Sr0.06)(Zr0.530Ti0.470)O-3 in the morphotropic phase boundary region: Evidence for a monoclinic C c space group
DOI:10.1103/PhysRevB.84.144116  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Solanki, Ravindra Singh;Singh, Akhilesh Kumar;Mishra, S. K.;Kennedy, Shane J.;Suzuki, Takashi;Kuroiwa, Yoshihiro;Moriyoshi, Chikako;Pandey, Dhananjai;
7:1:28:8     Optically isotropic and monoclinic ferroelectric phases in Pb(Zr1-xTix)O-3 (PZT) single crystals near morphotropic phase boundary
DOI:10.1103/PhysRevB.81.172103  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Bokov, Alexei A.;Long, Xifa;Ye, Zuo-Guang;
7:1:28:9     Merging of the polar and tilt instability lines near the respective morphotropic phase boundaries of PbZr1-xTixO3
DOI:10.1103/PhysRevB.87.094108  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Cordero, F.;Trequattrini, F.;Craciun, F.;Galassi, C.;
7:1:28:10     Confirmation of the monoclinic Cc space group for the ground state phase of Pb(Zr0.525Ti0.475)O-3: A combined synchrotron X-ray and neutron powder diffraction study
DOI:10.1063/1.4790569  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Solanki, Ravindra Singh;Mishra, Sunil Kumar;Senyshyn, Anatoliy;Yoon, Songhak;Baik, Sunggi;Shin, Namsoo;Pandey, Dhananjai;
7:1:28:11     A statistical model approximation for perovskite solid-solutions: A Raman study of lead-zirconate-titanate single crystal
DOI:10.1063/1.4798391  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:9  AU: Frantti, J.;Fujioka, Y.;Puretzky, A.;Xie, Y.;Ye, Z. -G.;Glazer, A. M.;
7:1:28:12     Low-frequency coupled modes in disordered Pb(Zr,Ti)O-3 solid solutions from first principles
DOI:10.1103/PhysRevB.85.014301  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Weerasinghe, Jeevaka;Wang, Dawei;Bellaiche, L.;
7:1:28:13     Local Structure of a Pure Bi A Site Polar Perovskite Revealed by Pair Distribution Function Analysis and Reverse Monte Carlo Modeling: Correlated Off-Axis Displacements in a Rhombohedral Material
DOI:10.1021/ja210698e  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:6  AU: Chong, Samantha Y.;Szczecinski, Robert J.;Bridges, Craig A.;Tucker, Matthew G.;Claridge, John B.;Rosseinsky, Matthew J.;
7:1:28:14     Dynamical coupling in Pb(Zr,Ti)O-3 solid solutions from first principles
DOI:10.1103/PhysRevB.83.020301  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Wang, Dawei;Weerasinghe, Jeevaka;Bellaiche, L.;Hlinka, Jirka;
7:1:28:15     Fermi Resonance Involving Nonlinear Dynamical Couplings in Pb(Zr, Ti)O-3 Solid Solutions
DOI:10.1103/PhysRevLett.107.175502  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:8  AU: Wang, Dawei;Buixaderas, Elena;Iniguez, Jorge;Weerasinghe, Jeevaka;Wang, Hong;Bellaiche, L.;
7:1:28:16     Ferroelectric and antiferrodistortive phase transition in the multiferroic (Bi0.8Ba0.2)(Fe0.8Ti0.2)O-3: A high temperature neutron powder diffraction study
DOI:10.1063/1.3606500  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Singh, Anar;Senyshyn, Anatoliy;Fuess, Hartmut;Pandey, Dhananjai;
7:1:28:17     Comparison of short-range ion-ion correlations in the alpha, beta and delta phases of Bi2O3
DOI:10.1016/j.ssi.2010.01.027  JN:SOLID STATE IONICS  PY:2011
  TC:5  AU: Norberg, Stefan T.;Eriksson, Sten G.;Hull, Stephen;
7:1:28:18     High-pressure neutron study of the morphotropic lead-zirconate-titanate: Phase transitions in a two-phase system
DOI:10.1063/1.4733570  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Frantti, J.;Fujioka, Y.;Zhang, J.;Wang, S.;Vogel, S. C.;Nieminen, R. M.;Asiri, A. M.;Zhao, Y.;Obaid, A. Y.;Mkhalid, I. A.;
7:1:28:19     Specific heat of ferroelectric Pb(Zr1-xTix)O-3 ceramics across the morphotropic phase boundary
DOI:10.1063/1.4712633  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Lang, S. B.;Zhu, W. M.;Ye, Z. -G.;
7:1:28:20     Nature of ferroelectric to paraelectric phase transition in multiferroic 0.8BiFeO(3)-0.2Pb(Fe1/2Nb1/2)O-3 ceramics
DOI:10.1063/1.3428410  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Patel, Jay Prakash;Singh, Anar;Pandey, Dhananjai;
7:1:28:21     Higher-order approximation of the phase transition in the Pb-based perovskite oxide solid-solutions
DOI:10.1063/1.4813489  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Li, Lin;Kim, Ilhwan;Jang, Kumok;Ri, Kwangson;Cha, Jongchol;
7:1:28:22     Local Crystal Structure of Antiferroelectric Bi2Mn4/3Ni2/3O6 in Commensurate and Incommensurate Phases Described by Pair Distribution Function (PDF) and Reverse Monte Carlo (RMC) Modeling
DOI:10.1021/cm4038439  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:1  AU: Szczecinski, Robert J.;Chong, Samantha Y.;Chater, Philip A.;Hughes, Helen;Tucker, Matthew G.;Claridge, John B.;Rosseinsky, Matthew J.;
7:1:28:23     Antiferrodistortive phase transition in pseudorhombohedral (Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and neutron powder diffraction study
DOI:10.1103/PhysRevB.86.174117  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;Unusual temperature dependence of the spectral weight near the Fermi;level of NdNiO3 thin films;PHYSICAL REVIEW B;86;19;195147;10.1103/PhysRevB.86.195147;NOV 30 2012;2012;We investigate the behavior of the spectral weight near the Fermi level;of NdNiO3 thin films as a function of temperature across the;metal-to-insulator transition (MIT) by means of ultraviolet;photoelectron spectroscopy. The spectral weight was found to exhibit;thermal hysteresis, similar to that of the dc conductivity. A detailed;analysis of the temperature dependence reveals two distinct regimes of;spectral loss close to the Fermi level. The temperature evolution of one;regime is found to be independent of the MIT.;Garcia-Fernandez, Mirian/B-6018-2013; Zubko, Pavlo/B-5496-2009;Zubko, Pavlo/0000-0002-7330-3163;2;0;0;0;2;1098-0121;WOS:000311715000006;;;J;Sen, Arnab;Damle, Kedar;Moessner, R.;Vacancy-induced spin textures and their interactions in a classical spin;liquid;PHYSICAL REVIEW B;86;20;205134;10.1103/PhysRevB.86.205134;NOV 30 2012;2012;Motivated by experiments on the archetypal frustrated magnet;SrCr9pGa12-9pO19 (SCGO), we study the classical Heisenberg model on the;pyrochlore slab (kagome bilayer) lattice with site dilution x = 1 - p.;This allows us to address generic aspects of the physics of nonmagnetic;vacancies in a classical spin liquid. We explicitly demonstrate that the;pure (x = 0) system remains a spin liquid down to the lowest;temperatures, with an unusual nonmonotonic temperature dependence of the;susceptibility, which even turns diamagnetic for the apical spins;between the two kagome layers. For x > 0 but small, the low-temperature;magnetic response of the system is most naturally described in terms of;the properties of spatially extended spin textures that cloak an;"orphan" S = 3/2 Cr3+ spin in direct proximity to a pair of missing;sites belonging to the same triangular simplex. In the T -> 0 limit,;these orphan-texture complexes each carry a net magnetization that is;exactly half the magnetic moment of an individual spin of the undiluted;system. Furthermore, we demonstrate that they interact via an entropic;temperature-dependent pairwise exchange interaction J(eff) (T,(r) over;right arrow) similar to T J ((r) over right arrow root T) that has a;logarithmic form at short distances and decays exponentially beyond a;thermal correlation length xi(T) similar to 1/root T. The sign of J(eff);depends on whether the two orphan spins belong to the same kagome layer;or not. We provide a detailed analytical account of these properties;using an effective field theory approach specifically tailored for the;problem at hand. These results are in quantitative agreement with;large-scale Monte Carlo numerics.;3;1;0;0;3;1098-0121;WOS:000311715100008;;;J;Solanki, Ravindra Singh;Mishra, S. K.;Senyshyn, Anatoliy;Ishii, I.;Moriyoshi, Chikako;Suzuki, Takashi;Kuroiwa, Yoshihiro;Pandey, Dhananjai;
7:1:28:24     Constraints on the possible long-range orbital ordering in LaCoO3
DOI:10.1016/j.jmmm.2013.09.001  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Phelan, D.;
7:1:28:25     Phase transformation in relaxor-ferroelectric single crystal [Pb(Sc1/2Nb1/2)O-3](0.58)-[PbTiO3](0.42)
DOI:10.1557/jmr.2014.87  JN:JOURNAL OF MATERIALS RESEARCH  PY:2014
  TC:1  AU: Rajasekaran, Shanmugam Velu;Achary, Srungarpu Nagabhusan;Patwe, Sadequa J.;Jayavel, Ramasamy;Mangamma, Garamilla;Tyagi, Ashok Kumar;
7:1:28:26     Crystal Structure Determinations of Zr Rich-PbZr1-xTixO3
DOI:10.1080/00150193.2011.577330  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Yokota, H.;Zhang, N.;Thomas, P. A.;Glazer, A. M.;
7:1:29:1     Lead-Free Relaxor Ferroelectrics
DOI:10.1111/j.1551-2916.2011.04952.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:108  AU: Shvartsman, Vladimir V.;Lupascu, Doru C.;
7:1:29:2     Giant electrostrains accompanying the evolution of a relaxor behavior in Bi(Mg,Ti)O-3-PbZrO3-PbTiO3 ferroelectric ceramics
DOI:10.1016/j.actamat.2013.02.055  JN:ACTA MATERIALIA  PY:2013
  TC:15  AU: Fu, Jian;Zuo, Ruzhong;
7:1:29:3     Dielectric Relaxor Evolution and Frequency-Insensitive Giant Strains in (Bi0.5Na0.5)TiO3-Modified Bi(Mg0.5Ti0.5)O3-PbTiO3 Ferroelectric Ceramics
DOI:10.1111/jace.12841  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Zhao, Wanli;Zuo, Ruzhong;Zheng, Donggeng;Li, Longtu;
7:1:29:4     Temperature-insensitive large electro strains and electric field induced intermediate phases in (0.7-x)Bi(Mg1/2Ti1/2)O-3-xPb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) ceramics
DOI:10.1016/j.jeurceramsoc.2014.07.017  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Zhao, Wanli;Zuo, Ruzhong;Fu, Jian;
7:1:29:5     Structure, piezoelectric, and ferroelectric properties of BaZrO3 substituted Bi(Mg1/2Ti1/2)O-3-PbTiO3 perovskite
DOI:10.1063/1.4722286  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Fan, Longlong;Chen, Jun;Kang, Huajun;Liu, Laijun;Fang, Liang;Deng, Jinxia;Yu, Ranbo;Xing, Xianran;
7:1:29:6     Enhanced piezoelectric and antiferroelectric properties of high-T-C perovskite of Zr-substituted Bi(Mg1/2Ti1/2)O-3-PbTiO3
DOI:10.1063/1.4755790  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Chen, Jun;Li, Jianyong;Fan, Longlong;Zou, Ning;Ji, Pengfei;Liu, Laijun;Fang, Liang;Kang, Huajun;Xing, Xianran;
7:1:29:7     Static and dynamic polar nanoregions in relaxor ferroelectric Ba(Ti1-xSnx)O-3 system at high temperature
DOI:10.1103/PhysRevB.85.014118  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Xie, L.;Li, Y. L.;Yu, R.;Cheng, Z. Y.;Wei, X. Y.;Yao, X.;Jia, C. L.;Urban, K.;Bokov, A. A.;Ye, Z. -G.;Zhu, J.;
7:1:29:8     Structural, dielectric, ferroelectric and strain properties in CaZrO3-modified Bi(Mg0.5Ti0.5)O-3-PbTiO3 solid solutions
DOI:10.1016/j.jallcom.2013.12.229  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Zhao, Wanli;Zuo, Ruzhong;Li, Feng;Li, Longtu;
7:1:29:9     Phase transition behavior and electrical properties of lead-free (Bi0.5K0.5)TiO3-LiNbO3 relaxor ferroelectric ceramics
DOI:10.1016/j.ceramint.2012.06.084  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Zuo, Wenwu;Zuo, Ruzhong;Zhao, Wanli;
7:1:29:10     Preparation and Characterization of High-Temperature Ferroelectric xBi(Mg1/2Ti1/2)O3-yBi(Zn1/2Ti1/2)O3-zPbTiO3 Perovskite Ternary Solid Solution
DOI:10.1111/j.1551-2916.2011.04721.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Dwivedi, Akansha;Qu, Weiguo;Randall, Clive A.;
7:1:29:11     Thermal history induced variable relaxor behavior in the high T-C ternary ferroelectric 0.6Bi(Mg1/2Ti1/2)O-3-0.05Bi(Zn1/2Ti1/2)O-3-0.35PbTiO(3)
DOI:10.1016/j.matlet.2011.06.072  JN:MATERIALS LETTERS  PY:2011
  TC:2  AU: Dwivedi, Akansha;Randall, Clive A.;Rossetti, George A., Jr.;
7:1:29:12     Relaxor Characteristics of the Phase Transformation in (1-x)BaTiO3-xBi (Zn1/2Ti1/2)O-3 Perovskite Ceramics
DOI:10.1111/jace.12495  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Triamnak, Narit;Yimnirun, Rattikorn;Pokorny, Jan;Cann, David P.;
7:1:30:1     The Antiferroelectric <-> Ferroelectric Phase Transition in Lead-Containing and Lead-Free Perovskite Ceramics
DOI:10.1111/j.1551-2916.2011.04917.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:58  AU: Tan, Xiaoli;Ma, Cheng;Frederick, Joshua;Beckman, Sarah;Webber, Kyle G.;
7:1:30:2     Electric-field-induced antiferroelectric to ferroelectric phase transition in mechanically confined Pb0.99Nb0.02[(Zr0.57Sn0.43)(0.94)Ti-0.06](0.98)O-3
DOI:10.1103/PhysRevB.81.014103  JN:PHYSICAL REVIEW B  PY:2010
  TC:23  AU: Tan, X.;Frederick, J.;Ma, C.;Aulbach, E.;Marsilius, M.;Hong, W.;Granzow, T.;Jo, W.;Roedel, J.;
7:1:30:3     Strains and Polarization During Antiferroelectric-Ferroelectric Phase Switching in Pb0.99Nb0.02[(Zr0.57Sn0.43)(1-y)Ti-y](0.98)O-3 Ceramics
DOI:10.1111/j.1551-2916.2010.04194.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:23  AU: Frederick, Joshua;Tan, Xiaoli;Jo, Wook;
7:1:30:4     Can an Electric Field Induce an Antiferroelectric Phase Out of a Ferroelectric Phase?
DOI:10.1103/PhysRevLett.105.255702  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:19  AU: Tan, X.;Frederick, J.;Ma, C.;Jo, W.;Roedel, J.;
7:1:30:5     Mechanical Confinement: An Effective Way of Tuning Properties of Piezoelectric Crystals
DOI:10.1002/adfm.201101301  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:20  AU: Marsilius, Mie;Frederick, Josh;Hu, Wei;Tan, Xiaoli;Granzow, Torsten;Han, Pengdi;
7:1:30:6     Antiferroelectricity induced by electric field in NaNbO3-based lead-free ceramics
DOI:10.1063/1.4863850  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Xu, Yonghao;Hong, Wei;Feng, Yujun;Tan, Xiaoli;
7:1:30:7     Transformation toughening in an antiferroelectric ceramic
DOI:10.1016/j.actamat.2013.09.038  JN:ACTA MATERIALIA  PY:2014
  TC:3  AU: Tan, X.;Young, S. E.;Seo, Y. H.;Zhang, J. Y.;Hong, W.;Webber, K. G.;
7:1:30:8     Mechanical self-confinement to enhance energy storage density of antiferroelectric capacitors
DOI:10.1063/1.4790135  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:12  AU: Young, S. E.;Zhang, J. Y.;Hong, W.;Tan, X.;
7:1:30:9     A technique for giant mechanical energy harvesting using ferroelectric/antiferroelectric materials
DOI:10.1063/1.4866877  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:11  AU: Patel, Satyanarayan;Chauhan, Aditya;Vaish, Rahul;
7:1:30:10     Effect of Ba Content on the Stress Sensitivity of the Antiferroelectric to Ferroelectric Phase Transition in (Pb,La,Ba,)(Zr,Sn,Ti)O-3 Ceramics
DOI:10.1111/jace.12585  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Xu, Yonghao;Guo, Hanzheng;Liu, Xiaoming;Feng, Yujun;Tan, Xiaoli;
7:1:30:11     Effect of compositional variations on phase transition and electric field-induced strain of (Pb, Ba) (Nb, Zr, Sn, Ti)O-3 ceramics
DOI:10.1016/j.ceramint.2012.12.047  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Zhang, Qingfeng;Zhang, Yangyang;Yang, Tongqing;Jiang, Shenglin;Wang, Jinfei;Chen, Shengchen;Li, Gang;Yao, Xi;
7:1:30:12     Self-generated electric field suppressing the ferroelectric to antiferroelectric phase transition in ferroelectric ceramics under shock wave compression
DOI:10.1063/1.3678005  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Jiang, Dongdong;Du, Jinmei;Gu, Yan;Feng, Yujun;
7:1:30:13     Phenomenological theory of electric-field-induced phase transition behavior of antiferroelectric ceramic (Pb,Ba,La)(Zr,Sn,Ti)O-3 under uniaxial compressive pre-stress
DOI:10.1063/1.4744010  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Xu, Yonghao;Feng, Yujun;Zhang, Na;Yan, Yangxi;Liao, Liming;
7:1:30:14     Enhanced performances of sandwich structure Pb-0.99(Zr0.95Ti0.05)(0.98)Nb0.02O3 ferroelectric ceramics for pulsed power application
DOI:10.1016/j.materresbull.2013.11.059  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Nie, Hengchang;Dong, Xianlin;Chen, Xuefeng;Wang, Genshui;He, Hongliang;
7:1:30:15     Effect of Barium Additions on Dielectric Properties and Phase Transitions in (Pb, La)(Zr, Sn, Ti)O3 Antiferroelectric Ceramics
DOI:10.1080/00150191003750861  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Zheng, Qiongna;Yang, Tongqing;Luo, Yongwen;Yao, Xi;
7:1:30:16     Softening of antiferroelectricity in PbZrO3-Pb(Mn1/2W1/2)O-3 complex perovskite solid solution
DOI:10.1063/1.4885935  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Ren, Zihe;Zhang, Nan;Su, Lun-Wei;Wu, Hua;Ye, Zuo-Guang;
7:1:30:17     Study of Antiferroelectric PbZrO3-Pb(M1/2W1/2)O-3 (M = Mg, Zn & Mn) Complex Perovskite Solid Solutions
DOI:10.1080/00150193.2014.892409  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Ren, Z.;Zhang, N.;Huo, S.;Wong, J. Y. Y.;Ye, Z-G;
7:1:30:18     Study on the Dielectric Properties of 0.75Pb(Mg1/3Nb2/3)O3-0.25PbTiO3 Ceramic Under Hydrostatic Pressure
DOI:10.1080/00150191003676983  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Zhang, Chonghui;Xu, Zhuo;Gao, Junjie;Yao, Xi;
7:1:30:19     Electric response of Pb-0.99 [(Zr0.90Sn0.10)(0.968)Ti-0.032](0.98)Nb0.02O3 ceramics to the shock-wave-induced ferroelectric-to-antiferroelectric phase transition
DOI:10.1016/j.mseb.2011.12.015  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:3  AU: Jiang, Dongdong;Zhang, Na;Feng, Yujun;Du, Jinmei;Gu, Yan;
7:1:30:20     Comparative study on the phase transitions in PZT-based ceramics by mechanical and dielectric analyses
DOI:10.1016/j.ceramint.2011.04.038  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Wu, Chuangui;Wang, Xusheng;Yao, Xi;
7:1:31:1     Electrically tunable dielectric materials and strategies to improve their performances
DOI:10.1016/j.pmatsci.2010.04.004  JN:PROGRESS IN MATERIALS SCIENCE  PY:2010
  TC:91  AU: Kong, L. B.;Li, S.;Zhang, T. S.;Zhai, J. W.;Boey, F. Y. C.;Ma, J.;
7:1:31:2     Ultraviolet assisted processing: A unique approach to mitigate oxygen vacancies and attain low loss highly tunable Ba0.60Sr0.40TiO3 thin films
DOI:10.1063/1.3671642  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Cole, M. W.;Toonen, R. C.;Ivill, M.;Hirsch, S. G.;Ngo, E.;Hubbard, C.;
7:1:31:3     Phase transition, high figure of merit and polar nano-regions in dielectric tunable lanthanum substituted barium titanate
DOI:10.1016/j.jallcom.2014.07.150  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Ren, Pengrong;Fan, Huiqing;Wang, Xin;Dong Guangzhi;
7:1:31:4     Modified tunable dielectric properties by addition of MgO on BaZr0.25Ti0.75O3 ceramics
DOI:10.1016/j.materresbull.2011.08.054  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:5  AU: Ren, Pengrong;Fan, Huiqing;Wang, Xin;Tan, Xiaohui;
7:1:31:5     Fabrication and characterization of iron and fluorine co-doped BST thin films for microwave applications
DOI:10.1007/s10853-013-7156-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:2  AU: Stemme, F.;Bruns, M.;Gesswein, H.;Schroeder, M.;Sazegar, M.;Drahus, M. D.;Eichel, R. -A.;Paul, F.;Azucena, C.;Binder, J. R.;
7:1:31:6     Piezoelectric, ferroelectric and dielectric properties of Sm2O3-doped (Bi-0 Na-5(0) (5))(0) Ba-94(0) 061TiO3 lead-free ceramics
DOI:10.1016/j.matchemphys.2010.08.033  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:15  AU: Fu, Peng;Xu, Zhijun;Chu, Ruiqing;Li, Wei;Zang, Guozhong;Hao, Jigong;
7:1:31:7     Dielectric nonlinearity and electrical properties of K0.5Na0.5NbO3-SrTiO3 relaxor ferroelectrics
DOI:10.1007/s10853-014-8518-3  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:1  AU: Liu, Zhiyong;Fan, Huiqing;Long, Changbai;
7:1:31:8     The Electronic Structure of Hf-Doped Barium Titanate
DOI:10.1080/00150193.2012.707578  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Fu, Chunlin;Liang, Jingnan;Cai, Wei;Zhang, Chaoyang;
7:1:31:9     Effects of thermal processing and iron doping in co-sputtered barium strontium titanate thin films
DOI:10.1007/s10853-012-6640-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Stemme, F.;Bruns, M.;Gesswein, H.;Schroeder, M.;Sazegar, M.;Drahus, M. D.;Eichel, R. -A.;Paul, F.;Hausselt, J.;Binder, J. R.;
7:1:31:10     Microstructure and Ferroelectric Properties of Ta-Doped Barium Titanate Hafnate Ceramics
DOI:10.1080/00150193.2012.707834  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Fu, Chunlin;Zhang, Mingyuan;Chen, Qiang;Cai, Wei;Chen, Gang;Deng, Xiaoling;
7:1:31:11     Microstructure and Dielectric Properties of La-doped Barium Titanate Hafnate Ceramics
DOI:10.1080/10584587.2012.735867  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Fu, Chunlin;Chen, Qiang;Cai, Wei;Chen, Gang;Deng, Xiaoling;
7:1:31:12     Effect of Calcination Temperature on the Microstructures of Barium Titanate Hafnate Nanopowders Prepared by the Sol-gel Process
DOI:10.1080/10584587.2012.735894  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Fu, Chunlin;Liao, Huan;Cai, Wei;Deng, Xiaoling;Chen, Gang;
7:1:31:13     Dielectric and tunable characteristics of Ba0.4Sr0.6TiO3-BaWO4 composite ceramics for microwave applications
DOI:10.1016/j.materresbull.2011.03.009  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:5  AU: Zhang, Mingwei;Zhai, Jiwei;Shen, Bo;Yao, Xi;
7:1:31:14     Electric Field-Dependent Properties of BaTiO3-Based Multilayer Ceramic Capacitors
DOI:10.1080/00150191003670424  JN:FERROELECTRICS  PY:2010
  TC:8  AU: Yue, Zhenxing;Zhao, Jianqiang;Yang, Gang;Li, Longtu;
7:1:31:15     Effect of Double Doping in Lead Zirconate Titanate (PZT) Lattices by Sol-Gel Technique for MEMS Applications
DOI:10.1080/10584587.2010.504132  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:8  AU: Pandey, S. K.;Thakur, O. P.;Bhattacharya, D. K.;Harsh;Prakash, Chandra;Chatterjee, Ratnamala;
7:1:31:16     Microstructure and microwave properties of inkjet printed barium strontium titanate thick-films for tunable microwave devices
DOI:10.1016/j.jeurceramsoc.2014.04.007  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Friederich, A.;Kohler, C.;Nikfalazar, M.;Wiens, A.;Sazegar, M.;Jakoby, R.;Bauer, W.;Binder, J. R.;
7:1:31:17     Evolution of dielectric properties in BaZrxTi1-xO3 ceramics: Effect of polar nano-regions
DOI:10.1016/j.actamat.2013.04.017  JN:ACTA MATERIALIA  PY:2013
  TC:6  AU: Xu, Qing;Zhan, Di;Liu, Han-Xing;Chen, Wen;Huang, Duan-Ping;Zhang, Feng;
7:1:31:18     The influence of processing on the microstructure and the microwave properties of Co-F-codoped barium strontium titanate thick-films
DOI:10.1016/j.jeurceramsoc.2011.11.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Friederich, A.;Zhou, X.;Sazegar, M.;Hausselt, J.;Jakoby, R.;Hoffmann, M. J.;Binder, J. R.;
7:1:31:19     Impact of microwave sintering on dielectric properties of screen printed Ba0.6Sr0.4TiO3 thick films
DOI:10.1016/j.jeurceramsoc.2013.09.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Paul, Florian;Menesklou, Wolfgang;Link, Guido;Zhou, Xianghui;Hausselt, Juergen;Binder, Joachim R.;
7:1:31:20     Low temperature crystallized voltage tunable Bi1.5CuxMg1-xNb1.5O7 thin films capable of integration with Au electrode
DOI:10.1016/j.ceramint.2012.02.088  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Ning, Ping-Fan;Li, Ling-Xia;Xia, Wang-Suo;Zhang, Xiao-Yu;
7:1:31:21     Microwave dielectric properties of low loss and highly tunable Ba0.5Sr0.5Ti1-3y/2WyO3 ceramics
DOI:10.1557/jmr.2011.429  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:1  AU: Zhang, Mingwei;Zhai, Jiwei;Shen, Bo;Yao, Xi;
7:1:31:22     Third-order electric-field-induced dipolar resonances from patterned barium-strontium-titanate thin-films
DOI:10.1063/1.4723692  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Toonen, Ryan C.;Cole, M. W.;
7:1:31:23     Rheological Control of the Coffee Stain Effect for Inkjet Printing of Ceramics
DOI:10.1111/jace.12385  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Friederich, A.;Binder, J. R.;Bauer, W.;
7:1:31:24     Correlation of the microstructure and microwave properties of Ba0.6Sr0.4TiO3 thick-films
DOI:10.1016/j.jeurceramsoc.2012.06.021  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Zhou, X.;Sazegar, M.;Stemme, F.;Hausselt, J.;Jakoby, R.;Binder, J. R.;
7:1:32:1     Identification and Effect of Secondary Phase in MnO2-Doped 0.8Pb (Zr0.52Ti0.48)O-3-0.2Pb(Zn1/3Nb2/3)O-3 Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2011.04629.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:21  AU: Yan, Yongke;Cho, Kyung-Hoon;Priya, Shashank;
7:1:32:2     Effect of MnO2 on the Piezoelectric Properties of the 0.75Pb(Zr0.47Ti0.53)O-3-0.25Pb(Zn1/3Nb2/3)O-3 Ceramics
DOI:10.1111/j.1551-2916.2010.03888.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:24  AU: Park, Hwi-Yeol;Nam, Chan-Hee;Seo, In-Tae;Choi, Jae-Hong;Nahm, Sahn;Lee, Hyeung-Gyu;Kim, Kwang-Jin;Jeong, Seong-Min;
7:1:32:3     Low-Temperature Sintering and Piezoelectric Properties of 0.65Pb(Zr1-xTix)O-3-0.35Pb(Ni0.33Nb0.67)O-3 Ceramics
DOI:10.1111/j.1551-2916.2011.04538.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:17  AU: Nam, Chan-hee;Park, Hwi-Yeol;Seo, In-Tae;Choi, Jae-Hong;Joung, Mi-Ri;Nahm, Sahn;Lee, Hwack-Joo;Kim, Young-Heon;Sung, Tae Hyun;
7:1:32:4     Effect of grain size on the phase structure and electrical properties of PZT-PNZN quaternary systems
DOI:10.1016/j.jallcom.2014.07.181  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Ai, Zhirong;Hou, Yudong;Zheng, Mupeng;Zhu, Mankang;
7:1:32:5     Shift of morphotropic phase boundary in high-performance fine-grained PZN-PZT ceramics
DOI:10.1016/j.jeurceramsoc.2014.02.041  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Zheng, Mupeng;Hou, Yudong;Zhu, Mankang;Zhang, Ming;Yan, Hui;
7:1:32:6     Phase transition and temperature stability of piezoelectric properties in Mn-modified Pb(Mg1/3Nb2/3)O-3-PbZrO3-PbTiO3 ceramics
DOI:10.1063/1.3703124  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Yan, Yongke;Kumar, Ashok;Correa, Margarita;Cho, Kyung-Hoon;Katiyar, R. S.;Priya, Shashank;
7:1:32:7     Effects of sintering temperature on microstructure and high field strain of niobium-strontium doped morphotropic lead zirconate titanate
DOI:10.1063/1.3294648  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Kungl, Hans;Hoffmann, Michael J.;
7:1:32:8     The formation of (Zn,Ni)TiO3 secondary phase in NiO-modified Pb(Zn1/3Nb2/3)O-3-PbZrO3-PbTiO3 ceramics
DOI:10.1016/j.scriptamat.2013.01.014  JN:SCRIPTA MATERIALIA  PY:2013
  TC:4  AU: Zheng, Mupeng;Hou, Yudong;Ge, Haiyan;Zhu, Mankang;Yan, Hui;
7:1:32:9     Role of Secondary Phase in High Power Piezoelectric PMN-PZT Ceramics
DOI:10.1111/j.1551-2916.2011.04891.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Yan, Yongke;Cho, Kyung-Hoon;Priya, Shashank;
7:1:32:10     Identification of Substitution Mechanism in Group VIII Metal Oxides Doped Pb(Zn1/3Nb2/3)O-3-PbZrO3-PbTiO3 Ceramics with High Energy Density and Mechanical Performance
DOI:10.1111/jace.12334  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Zheng, Mupeng;Hou, Yudong;Wang, Sai;Duan, Chenghui;Zhu, Mankang;Yan, Hui;
7:1:32:11     High Energy Density Piezoelectric Ceramics for Energy Harvesting Devices
DOI:10.1111/j.1551-2916.2011.04817.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:14  AU: Seo, In-Tae;Cha, Yu-Joung;Kang, In-Young;Choi, Jae-Hong;Nahm, Sahn;Seung, Tae-Hyun;Paik, Jong-Hoo;
7:1:32:12     Effect of the structural properties on the energy density of Pb(Zr0.47Ti0.53)O-3-Pb[(Ni0.6Zn0.4)(1/3)Nb-2/3]O-3 ceramics
DOI:10.1063/1.3653274  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Cha, Yu-Joung;Seo, In-Tae;Kang, In-Young;Shin, Sang-Bong;Choi, Jae-Hong;Nahm, Sahn;Seung, Tae-Hyun;Paik, Jong-Hoo;
7:1:32:13     Effect of valence state and incorporation site of cobalt dopants on the microstructure and electrical properties of 0.2PZN-0.8PZT ceramics
DOI:10.1016/j.actamat.2012.11.026  JN:ACTA MATERIALIA  PY:2013
  TC:7  AU: Zheng, M. -P.;Hou, Y. -D.;Xie, F. -Y.;Chen, J.;Zhu, M. -K.;Yan, H.;
7:1:32:14     Effect of NiO additive on microstructure, mechanical behavior and electrical properties of 0.2PZN-0.8PZT ceramics
DOI:10.1016/j.jeurceramsoc.2012.12.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:11  AU: Zheng, Mu-Peng;Hou, Yu-Dong;Ge, Hai-Yan;Zhu, Man-Kang;Yan, Hui;
7:1:32:15     MnO2 doped PSN-PZN-PZT piezoelectric ceramics for resonant actuator application
DOI:10.1016/j.jallcom.2014.06.144  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Yu, Yang;Wu, Jingen;Zhao, Tianlong;Dong, Shuxiang;Gu, Haoshuang;Hu, Yongming;
7:1:32:16     Effect of CuO on the sintering temperature and piezoelectric properties of MnO2-doped 0.75Pb(Zr0.47Ti0.53)O-3-0.25Pb(Zn1/3Nb2/3)O-3 ceramics
DOI:10.1016/j.jallcom.2010.12.163  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Nam, Chan-Hee;Park, Hwi-Yeol;Seo, In-Tae;Choi, Jae-Hong;Nahm, Sahn;Lee, Hyeung-Gyu;
7:1:32:17     Structures and Properties of Pb(Zr0.5Ti0.5)O-3 - Pb(Zn1/3Nb2/3)O-3 - Pb(Ni1/3Nb2/3)O-3 Ceramics for Energy Harvesting Devices
DOI:10.1111/jace.13175  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Yuan, Dewang;Yang, Ying;Hu, Querui;Wang, Yiping;
7:1:32:18     Relation between piezoelectric properties of ceramics and output power density of energy harvester
DOI:10.1016/j.jeurceramsoc.2012.12.011  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Choi, Chang-Hoi;Seo, In-Tae;Song, Daniel;Jang, Min-Soo;Kim, Bo-Yun;Nahm, Sahn;Sung, Tae-Hyun;Song, Hyun-Cheol;
7:1:32:19     Piezoelectric response of charged non-180 degrees domain walls in ferroelectric ceramics
DOI:10.1063/1.3679084  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Li, Zhanfang;Wu, Hao;Cao, Wenwu;
7:1:32:20     Comparative study of microstructure, electric properties and conductivity for NiO and PNN modified Pb(Zn1/3Nb2/3)O-3-PbZrO3-PbTiO3 ceramics
DOI:10.1016/j.materresbull.2013.12.061  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Zheng, Mupeng;Hou, Yudong;Zhu, Mankang;Zhang, Ming;Yan, Hui;
7:1:32:21     Temperature dependent structural and dielectric investigations of PbZr0.5Ti0.5O3 solid solution at the morphotropic phase boundary
DOI:10.1016/j.ceramint.2012.08.049  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Srivastava, Geetika;Goswami, Ankur;Umarji, A. M.;
7:1:32:22     The influence of Zr/Ti content on the morphotropic phase boundary in the PZT-PZN system
DOI:10.1016/j.mseb.2010.01.060  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:4  AU: Geetika;Umarji, A. M.;
7:1:32:23     Effects of cobalt doping on the microstructure, complex impedance and activation energy in 0.2PZN-0.8PZT ceramics
DOI:10.1016/j.matchemphys.2012.11.068  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:3  AU: Zheng, Mupeng;Hou, Yudong;Fu, Jing;Fan, Xinwei;Zhu, Mankang;Yan, Hui;
7:1:32:24     The study of dielectric, pyroelectric and piezoelectric properties on hot pressed PZT-PMN systems
DOI:10.1063/1.4769889  JN:AIP ADVANCES  PY:2012
  TC:2  AU: Srivastava, Geetika;Maglione, Mario;Umarji, A. M.;
7:1:32:25     Large electric-induced pyroelectric properties in Mn-doped (Pb0.87La0.02Ba0.1)(Zr0.75Sn0.16Ti0.09)O-3 ceramics
DOI:10.1016/j.jallcom.2012.08.111  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Zhang, Qingfeng;Chen, Shengchen;Fan, Maoyan;Jiang, Shenglin;Yang, Tongqing;Wang, Jinfei;Li, Gang;Yao, Xi;
7:1:32:26     Effect of Zr/Ti ratio on piezoelectric properties of Pb(Ni1/3Sb2/3)O-3-Pb(ZrTi)O-3 ceramics
DOI:10.1016/j.ceramint.2011.06.006  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:3  AU: Lonkar, C. M.;Kharat, D. K.;Kumar, H. H.;Prasad, Sahab;Ghosh, Mrinal;Kumbhar, C. S.;
7:1:32:27     Effect of PMN content on the phase structure and electrical properties of PMN-PZT ceramics
DOI:10.1016/j.ceramint.2013.04.023  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Wang, Li;Liang, Ruihong;Mao, Chaoliang;Du, Gang;Wang, Genshui;Dong, Xianlin;
7:1:32:28     Influence of Temperature on Dielectric and Piezoelectric Behaviors of Stannate Modified Lead Zirconate Titanate Ceramics
DOI:10.1080/00150193.2010.485891  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Jiang, Dongdong;Feng, Yujun;Tang, Hua;Gu, Yan;Du, Jinmei;
7:1:32:29     Synthesis and Properties of 0.8PZT-0.10PZN-0.10PNN Ceramics
DOI:10.1080/00150193.2011.577658  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Nabunmee, Sucheewan;Taweetunkasiri;Jarupoom, Parkpoom;Rujijanagul, Gobwute;
7:1:32:30     TEM Observations on 0.65Pb(Zr0.42Ti0.58)O3-0.35Pb(Ni0.33Nb0.67)O3 Ceramics with CuO Additive
DOI:10.1111/j.1551-2916.2012.05461.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Kim, Young Heon;Ryu, Hyun;Cho, Yang-Koo;Lee, Hwack-Joo;Nahm, Sahn;
7:1:32:31     Energy flow in piezoelectric energy harvesting systems
DOI:10.1088/0964-1726/20/1/015005  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:34  AU: Liang, Junrui;Liao, Wei-Hsin;
7:1:33:1     Challenges and opportunities for multi-functional oxide thin films for voltage tunable radio frequency/microwave components
DOI:10.1063/1.4827019  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:16  AU: Subramanyam, Guru;Cole, M. W.;Sun, Nian X.;Kalkur, Thottam S.;Sbrockey, Nick M.;Tompa, Gary S.;Guo, Xiaomei;Chen, Chonglin;Alpay, S. P.;Rossetti, G. A., Jr.;Dayal, Kaushik;Chen, Long-Qing;Schlom, Darrell G.;
7:1:33:2     Pyroelectric properties of barium strontium titanate films: Effect of thermal stresses
DOI:10.1063/1.3475482  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:16  AU: Zhang, J.;Cole, M. W.;Alpay, S. P.;
7:1:33:3     Pyroelectric and dielectric properties of ferroelectric films with interposed dielectric buffer layers
DOI:10.1063/1.4903993  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Espinal, Y.;Kesim, M. T.;Misirlioglu, I. B.;Trolier-McKinstry, S.;Mantese, J. V.;Alpay, S. P.;
7:1:33:4     Tailoring dielectric properties of ferroelectric-dielectric multilayers
DOI:10.1063/1.4861716  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Kesim, M. T.;Cole, M. W.;Zhang, J.;Misirlioglu, I. B.;Alpay, S. P.;
7:1:33:5     Pyroelectric response of lead zirconate titanate thin films on silicon: Effect of thermal stresses
DOI:10.1063/1.4833555  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Kesim, M. T.;Zhang, J.;Trolier-McKinstry, S.;Mantese, J. V.;Whatmore, R. W.;Alpay, S. P.;
7:1:33:6     Enhanced dielectric properties from barium strontium titanate films with strontium titanate buffer layers
DOI:10.1063/1.4827421  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Cole, M. W.;Ngo, E.;Hubbard, C.;Hirsch, S. G.;Ivill, M.;Sarney, W. L.;Zhang, J.;Alpay, S. P.;
7:1:33:7     Bulk-like dielectric properties from metallo-organic solution-deposited SrTiO3 films on Pt-coated Si substrates
DOI:10.1063/1.3692811  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Weiss, C. V.;Zhang, J.;Spies, M.;Abdallah, L. S.;Zollner, S.;Cole, M. W.;Alpay, S. P.;
7:1:33:8     Voltage induced acoustic resonance in metal organic chemical vapor deposition SrTiO3 thin film
DOI:10.1116/1.4757129  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2012
  TC:6  AU: Sbrockey, Nick M.;Tompa, Gary S.;Kalkur, Thottam S.;Zhang, Jialan;Alpay, S. Pamir;Cole, Melanie W.;
7:1:33:9     Thermodynamics of polar anisotropy in morphotropic ferroelectric solid solutions
DOI:10.1080/14786430902897750  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:17  AU: Heitmann, A. A.;Rossetti, G. A., Jr.;
7:1:33:10     Effect of thermal stresses on the dielectric properties of strontium titanate thin films
DOI:10.1063/1.3617430  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Zhang, J.;Weiss, C. V.;Alpay, S. P.;
7:1:33:11     Influence of thermal stresses on the electrocaloric properties of ferroelectric films
DOI:10.1063/1.3573788  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Zhang, J.;Alpay, S. P.;Rossetti, G. A., Jr.;
7:1:33:12     Some unusual behavior of dielectric properties of SrTiO3 metal organic chemical vapor deposition grown thin films
DOI:10.1063/1.4894811  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Shreiber, D.;Cole, M. W.;Enriquez, E.;Hirsch, S. G.;Ngo, E.;Hubbard, C.;Ivill, M.;Chen, Chonglin;
7:1:33:13     Impact of thermal stress on the piezoelectric and dielectric properties of PbTiO3 thick films on various substrates
DOI:10.1063/1.4891978  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Bai, Gang;Liu, Zhiguo;Yan, Xiaobing;Zhang, Changchun;
7:1:33:14     Polar Anisotropy and Inter-Ferroelectric Transitions in Barium Titanate and its Solid Solutions
DOI:10.1080/10584587.2011.575018  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:4  AU: Heitmann, A. A.;Rossetti, G. A., Jr.;
7:1:33:15     Strain engineered barium strontium titanate for tunable thin film resonators
DOI:10.1063/1.4879281  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Khassaf, H.;Khakpash, N.;Sun, F.;Sbrockey, N. M.;Tompa, G. S.;Kalkur, T. S.;Alpay, S. P.;
7:1:33:16     MOCVD Growth of Compositionally Graded BaxSr1-xTiO3 Thin Films
DOI:10.1080/10584587.2011.574975  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:6  AU: Sbrockey, N. M.;Cole, M. W.;Kalkur, T. S.;Luong, M.;Spanier, J. E.;Tompa, G. S.;
7:1:33:17     Temperature field and residual stress analysis of multilayer pyroelectric thin film
DOI:10.1016/j.ceramint.2011.08.019  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Xu, Zunping;Yan, Dongxu;Xiao, Dingquan;Yu, Ping;Zhu, Jianguo;
7:1:33:18     Dielectric and tunable properties of bulk columnar Ba0.6Sr0.4TiO3/MgO composites
DOI:10.1016/j.ceramint.2012.06.058  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Liao, Wanfang;Liang, Ruihong;Wang, Genshui;Cao, Fei;Dong, Xianlin;
7:1:33:19     Influence of the Precursor Solution Molarity on the Dielectric Response of Chemical Solution Deposited Strontium Titanate Thin Films on Si
DOI:10.1080/10584587.2011.574966  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Weiss, C. V.;Cole, M. W.;Alpay, S. P.;
7:1:33:20     An Elegant Post-Growth Process Science Protocol to Improve the Material Properties of Complex Oxide Thin Films for Tunable Device Applications
DOI:10.1080/10584587.2011.574982  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:1  AU: Cole, M. W.;Toonen, R. C.;Hirsch, S. G.;Ivill, M.;Ngo, E.;Hubbard, C.;Ramanathan, S.;Podpirka, A.;
7:1:33:21     Novel Multi-Capacitor Architecture for BST Thin Film Varactors
DOI:10.1080/10584587.2011.573995  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:1  AU: Subramanyam, Guru;Patterson, Mark;Leedy, Kevin;Neidhard, Robert;Varanasi, Chakrapani;Steinhauer, Gregg;
7:1:33:22     Spread Spectrum Clock Generation Using Ferroelectric Capacitors
DOI:10.1080/10584587.2011.574037  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Kabir, Abu;Kalkur, T. S.;
7:1:34:1     High-field dielectric properties and Raman spectroscopic investigation of the ferroelectric-to-relaxor crossover in BaSnxTi1-xO3 ceramics
DOI:10.1063/1.3703672  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:13  AU: Deluca, Marco;Stoleriu, Laurentiu;Curecheriu, Lavinia Petronela;Horchidan, Nadejda;Ianculescu, Adelina Carmen;Galassi, Carmen;Mitoseriu, Liliana;
7:1:34:2     Investigation of the composition-dependent properties of BaTi1-xZrxO3 ceramics prepared by the modified Pechini method
DOI:10.1016/j.jeurceramsoc.2012.05.007  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:19  AU: Deluca, Marco;Vasilescu, Catalina A.;Ianculescu, Adelina C.;Berger, Daniela C.;Ciomaga, Cristina E.;Curecheriu, Lavinia P.;Stoleriu, Laurentiu;Gajovic, Andreja;Mitoseriu, Liliana;Galassi, Carmen;
7:1:34:3     Enhanced microwave dielectric properties of Ba0.4Sr0.6TiO3 ceramics doping by metal Fe powders
DOI:10.1063/1.4766276  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Zhang, Qiwei;Zhai, Jiwei;Ben, Qianqian;Yu, Xian;Yao, Xi;
7:1:34:4     Preparation and characterization of barium titanate stannate solid solutions
DOI:10.1016/j.jallcom.2011.01.123  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:17  AU: Horchidan, Nadejda;Ianculescu, Adelina C.;Curecheriu, Lavinia P.;Tudorache, Florin;Musteata, Valentina;Stoleriu, Stefania;Dragan, Nicolae;Crisan, Dorel;Tascu, Sorin;Mitoseriu, Liliana;
7:1:34:5     Multiscale study of ferroelectric-relaxor crossover in BaSnxTi1-xO3 ceramics
DOI:10.1016/j.jeurceramsoc.2014.06.005  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Horchidan, N.;Ianculescu, A. C.;Vasilescu, C. A.;Deluca, M.;Musteata, V.;Ursic, H.;Frunza, R.;Malic, B.;Mitoseriu, L.;
7:1:34:6     Oxygen deficiency and grain boundary-related giant relaxation in Ba(Zr,Ti)O-3 ceramics
DOI:10.1063/1.3664749  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:18  AU: Ciomaga, Cristina E.;Buscaglia, Maria T.;Buscaglia, Vincenzo;Mitoseriu, Liliana;
7:1:34:7     Structural, electrical and piezoelectric properties of nanocrystalline tin-substituted barium titanate ceramics
DOI:10.1016/j.jallcom.2010.11.106  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Singh, K. Chandramani;Nath, A. K.;Laishram, Radhapiyari;Thakur, O. P.;
7:1:34:8     Ferroelectric-relaxor crossover characteristics in Ba(ZrxTi1-x)O-3 ceramics investigated by AFM-piezoresponse study
DOI:10.1016/j.jeurceramsoc.2009.05.022  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:15  AU: Ricinschi, Dan;Ciomaga, Cristina Elena;Mitoseriu, Liliana;Buscaglia, Vincenzo;Okuyama, Masanori;
7:1:34:9     Investigation of ferroelectric phase transition for barium strontium titanate ceramics by in situ Raman scattering
DOI:10.1063/1.4771669  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Zhang, Qiwei;Zhai, Jiwei;Kong, Lingbing;Yao, Xi;
7:1:34:10     Temperature dependence of tunability of Ba(SnxTi1-x)O-3 ceramics
DOI:10.1063/1.3567947  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Curecheriu, Lavinia P.;Ianculescu, Adelina C.;Horchidan, Nadejda;Stoleriu, Stefania;Tudorache, Florin;Tascu, Sorin;Mitoseriu, Liliana;
7:1:34:11     Enhanced Piezoelectric Properties and Tunability of Lead-Free Ceramics Prepared by High-Energy Ball Milling
DOI:10.1007/s11664-013-2812-8  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:2  AU: Mahesh, M. L. V.;Bhanuprasad, V. V.;James, A. R.;
7:1:34:12     Modified Johnson model for ferroelectric lead lanthanum zirconate titanate at very high fields and below Curie temperature
DOI:10.1063/1.3676668  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Narayanan, Manoj;Tong, Sheng;Ma, Beihai;Liu, Shanshan;Balachandran, Uthamalingam;
7:1:34:13     Crystal structure refinement and investigation of electrically heterogeneous microstructure of single phased Sr substituted BaTiO3 ceramics
DOI:10.1016/j.jallcom.2013.04.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Sindhu, Monica;Ahlawat, Neetu;Sanghi, Sujata;Kumari, Rekha;Agarwal, Ashish;
7:1:34:14     Effect of Zr substitution on phase transformation and dielectric properties of Ba0.9Ca0.1TiO3 ceramics
DOI:10.1063/1.4825123  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Sindhu, Monica;Ahlawat, Neetu;Sanghi, Sujata;Kumari, Rekha;Agarwal, Ashish;
7:1:34:15     Dielectric inspection of BaZr0.2Ti0.8O3 ceramics under bias electric field: A survey of polar nano-regions
DOI:10.1016/j.materresbull.2012.03.062  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:6  AU: Xu, Qing;Zhan, Di;Huang, Duan-Ping;Liu, Han-Xing;Chen, Wen;Zhang, Feng;
7:1:34:16     Enhanced dielectric and ferroelectric properties of lead-free Ba(Zr0.15Ti0.85)O-3 ceramics compacted by cold isostatic pressing
DOI:10.1016/j.jallcom.2014.05.098  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Mahesh, M. L. V.;Prasad, V. V. Bhanu;James, A. R.;
7:1:34:17     Effect of MgO-CaO-Al2O3-SiO2 glass additive on dielectric properties of Ba0.95Sr0.05Zr0.2Ti0.8O3 ceramics
DOI:10.1016/j.jallcom.2012.12.164  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Xu, Qing;Zhan, Di;Huang, Duan-Ping;Liu, Han-Xing;Chen, Wen;Zhang, Feng;
7:1:34:18     On the capacitance versus voltage response and tunability of ferroelectrics: A microscopic model
DOI:10.1063/1.4791757  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Jimenez, Rolando Placeres;Rino, Jose Pedro;Fraygola, Barbara;Eiras, Jose Antonio;
7:1:34:19     Dielectric and tunability properties of La-doped BaTiO3 ceramics
DOI:10.1016/j.jallcom.2011.08.027  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Ianculescu, A.;Mocanu, Z. V.;Curecheriu, L. P.;Mitoseriu, L.;Padurariu, L.;Trusca, R.;
7:1:34:20     Synthesis and characterization of BaTi1-xSnxO3-0.5 mol%GeO2
DOI:10.1016/j.jallcom.2012.06.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:0  AU: Bucur, Raul Alin;Bucur, Alexandra Ioana;Novaconi, Stefan;Nicoara, Irina;
7:1:34:21     Structural and dielectric properties of Na1-xBaxNb1-x(Sn0.5Ti0.5)(x)O-3 ceramics
DOI:10.1007/s10853-011-5987-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:0  AU: Khelifi, H.;Aydi, A.;Abdelmoula, N.;Simon, A.;Maalej, A.;Khemakhem, H.;Maglione, M.;
7:1:34:22     Structural and electrical characteristics of dysprosium-doped barium stannate titanate ceramics
DOI:10.1016/j.materresbull.2009.12.022  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:1  AU: Wang, Shijie;Tan, Tai Aik;Lai, Man On;Lu, Li;
7:1:34:23     Size-dependent structural preferences and magnetization enhancement in 0.5Bi(0.8)La(0.2)FeO(3)-0.5PbTiO(3)
DOI:10.1063/1.3525120  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Wei, T.;Liu, H. M.;Zhu, C.;Guo, Y. J.;Liu, J. -M.;Wu, Y. J.;Chen, X. M.;
7:1:35:1     Aging of 0-3 piezoelectric PZT ceramic-Portland cement composites
DOI:10.1016/j.ceramint.2014.05.073  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Chaipanich, Arnon;Rianyoi, Rattiyakorn;Potong, Ruamporn;Jaitanong, Nittaya;
7:1:35:2     Acoustic and electrical properties of 1-3 connectivity bismuth sodium titanate-Portland cement composites
DOI:10.1016/j.materresbull.2014.08.049  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Rianyoi, Rattiyakorn;Potong, Ruamporn;Ngamjarurojana, Athipong;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar S.;Chaipanich, Arnon;
7:1:35:3     Dielectric and piezoelectric properties of 1-3 non-lead barium zirconate titanate-Portland cement composites
DOI:10.1016/j.ceramint.2012.10.034  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Potong, Ruamporn;Rianyoi, Rattiyakorn;Ngamjarurojana, Athipong;Chaipanich, Arnon;
7:1:35:4     Influence of barium titanate content and particle size on electromechanical coupling coefficient of lead-free piezoelectric ceramic-Portland cement composites
DOI:10.1016/j.ceramint.2012.10.033  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Rianyoi, Rattiyakorn;Potong, Ruamporn;Ngamjarurojana, Athipong;Chaipanich, Arnon;
7:1:35:5     Dielectric, ferroelectric and piezoelectric properties of 0-3 barium titanate-Portland cement composites
DOI:10.1007/s00339-011-6307-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:15  AU: Rianyoi, R.;Potong, R.;Jaitanong, N.;Yimnirun, R.;Chaipanich, A.;
7:1:35:6     Effect of carbon addition on the ferroelectric hysteresis properties of lead zirconate-titanate ceramic-cement composites
DOI:10.1016/j.ceramint.2010.11.037  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:9  AU: Chaipanich, A.;Jaitanong, N.;Yimnirun, R.;
7:1:35:7     Effect of compressive stress on the ferroelectric hysteresis behavior in 0-3 PZT-cement composites
DOI:10.1016/j.matlet.2009.11.050  JN:MATERIALS LETTERS  PY:2010
  TC:12  AU: Chaipanich, Arnon;Jaitanong, Nittaya;Yimnirun, Rattikorn;
7:1:35:8     Fabrication and performance investigation of 2-2 connectivity lead-free barium zirconate titanate-Portland cement composites
DOI:10.1016/j.ceramint.2014.01.091  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Potong, Ruanaporn;Rianyoi, Rattiyakorn;Ngamjarurojana, Athipong;Chaipanich, Arnon;
7:1:35:9     Fabrication and properties of piezoelectric composites designed for process monitoring of cement hydration reaction
DOI:10.1016/j.matchemphys.2011.10.050  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:8  AU: Xu, Dongyu;Qin, Lei;Huang, Shifeng;Cheng, Xin;
7:1:35:10     Effect of Particle Size on Dielectric and Ferroelectric Properties of 0-3 Lead Magnesium Niobate Titanate-Portland Cement Composites
DOI:10.1080/00150193.2010.482899  JN:FERROELECTRICS  PY:2010
  TC:7  AU: Potong, R.;Rianyoi, R.;Jareansuk, L.;Jaitanong, N.;Yimnirun, R.;Chaipanich, A.;
7:1:35:11     Effect of particle size on the dielectric and piezoelectric properties of 0-3BCTZO/cement composites
DOI:10.1016/j.ceramint.2013.05.118  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Hunpratub, Sitchai;Yamwong, Teeraporn;Srilomsak, Sutham;Maensiri, Santi;Chindaprasirt, Prinya;
7:1:35:12     Acoustic, Dielectric and Piezoelectric Properties of 1-3 Connectivity Barium Titanate-Portland Cement Composites
DOI:10.1080/00150193.2013.841519  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Rianyoi, Rattiyakorn;Potong, Ruamporn;Ngamjarurojana, Athipong;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar S.;Chaipanich, Arnon;
7:1:35:13     Electromechanical Coupling Coefficient of 1-3 Connectivity Barium Titanate-Portland Cement Composites
DOI:10.1080/10584587.2013.852449  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:1  AU: Rianyoi, Rattiyakorn;Potong, Ruamporn;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar S.;Chaipanich, Arnon;
7:1:35:14     Dielectric and ferroelectric hysteresis properties of 1-3 lead magnesium niobate-lead titanate ceramic/Portland cement composites
DOI:10.1016/j.ceramint.2011.04.095  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Chaipanich, A.;Potong, R.;Rianyoi, R.;Jareansuk, L.;Jaitanong, N.;Yimnirun, R.;
7:1:35:15     Micro-scaled size-dependence of the effective properties of 0-3 PZT-cement composites: Experiments and modeling
DOI:10.1016/j.compscitech.2014.09.021  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2014
  TC:0  AU: Wang, Z.;Jin, X. Y.;Chen, W. Q.;Zhang, Ch.;Fu, C. Q.;Gong, H. Y.;
7:1:35:16     Acoustic and Piezoelectric Properties of 0-3 Barium Zirconate Titanate-Portland Cement Composites-Effects of BZT Content and Particle Size
DOI:10.1080/00150193.2013.843955  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Potong, Ruamporn;Rianyoi, Rattiyakorn;Ngamjarurojana, Athipong;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar S.;Chaipanich, Arnon;
7:1:35:17     Performance investigation of 1-3 piezoelectric ceramic-cement composite
DOI:10.1016/j.matchemphys.2009.12.045  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:18  AU: Cheng Xin;Xu Dongyu;Lu Lingchao;Huang Shifeng;Jiang Minhua;
7:1:35:18     Interfacial morphology and domain configurations in 0-3 PZT-Portland cement composites
DOI:10.1016/j.apsusc.2009.12.013  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:6  AU: Jaitanong, N.;Zeng, H. R.;Li, G. R.;Yin, Q. R.;Vittayakorn, W. C.;Yimnirun, R.;Chaipanich, A.;
7:1:35:19     Ferroelectric hysteresis behavior and dielectric properties of 1-3 lead zirconate titanate-cement composites
DOI:10.1016/j.ceramint.2011.04.098  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Potong, R.;Rianyoi, R.;Jaitanong, N.;Yimnirun, R.;Chaipanich, A.;
7:1:35:20     Dielectric and Piezoelectric Properties of 2-2 PZT-Portland Cement Composites
DOI:10.1080/10584587.2013.853574  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:1  AU: Chaipanich, Arnon;Rianyoi, Rattiyakorn;Potong, Ruamporn;Penpokai, Pritsana;Chindaprasirt, Prinya;
7:1:35:21     Effect of Particle Size on Dielectric Properties and Hysteresis Behavior of 0-3 Barium Zirconate Titanate-Portland Cement Composites
DOI:10.1080/10584587.2013.852057  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Potong, Ruamporn;Rianyoi, Rattiyakorn;Ngamjarurojana, Athipong;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar S.;Chaipanich, Arnon;
7:1:35:22     High piezoelectricity 0-3 cement-based piezoelectric composites
DOI:10.1016/j.matlet.2012.02.094  JN:MATERIALS LETTERS  PY:2012
  TC:12  AU: Wang, Fazhou;Wang, Hao;Song, Yan;Sun, Huajun;
7:1:35:23     Piezoelectric properties of cement based/PVDF/PZT composites
DOI:10.1016/j.matlet.2014.05.040  JN:MATERIALS LETTERS  PY:2014
  TC:3  AU: Jaitanong, N.;Yimnirun, R.;Zeng, H. R.;Li, G. R.;Yin, Q. R.;Chaipanich, A.;
7:1:35:24     Synthesis and characterization of lead zirconate titanate (PZT) obtained by two chemical methods
DOI:10.1016/j.ceramint.2013.07.068  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Oliveira, C. A.;Longo, E.;Varela, J. A.;Zaghete, M. A.;
7:1:35:25     Investigations on Morphology and Domain Configurations in 0-3 Lead Magnesium Niobate Titanate-Portland Cement Composites by SEM and PFM
DOI:10.1080/00150193.2013.845484  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Jaitanong, N.;Zeng, H. R.;Li, G. R.;Yin, Q. R.;Yimnirun, R.;Chaipanich, A.;
7:1:35:26     Compressive Strength and Microstructure of 0-3 Lead Zirconate Titanate Ceramic-Portland Cement Composites
DOI:10.1080/00150193.2013.847333  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Chaipanich, Arnon;Rianyoi, Rattiyakorn;Potong, Ruamporn;Jaitanong, Nittaya;Chindaprasirt, Prinya;
7:1:35:27     Exact analysis of the dynamic properties of a 2-2 cement based piezoelectric transducer
DOI:10.1088/0964-1726/20/8/085017  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:8  AU: Zhang, Taotao;Shi, Zhifei;
7:1:35:28     Design, fabrication, and properties of 2-2 connectivity cement/polymer based piezoelectric composites with varied piezoelectric phase distribution
DOI:10.1063/1.4904931  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Xu Dongyu;Cheng Xin;Banerjee, Sourav;Huang Shifeng;
7:1:35:29     Enhanced electrical properties of composite nanostructures using BiFeO3 nanotubes and ferroelectric copolymers
DOI:10.1016/j.matlet.2012.12.056  JN:MATERIALS LETTERS  PY:2013
  TC:3  AU: You, S. J.;Ai, L.;Li, D.;Huang, H. M.;Chen, W. P.;Liu, W.;Guo, S. S.;Zhao, X. Z.;
7:1:35:30     Effect of Barium Titanate Particle Size on Electrical Properties of 0-3 Barium Titanate-Portland Cement Composites
DOI:10.1080/10584587.2013.874306  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Rianyoi, R.;Potong, R.;Yimnirun, R.;Chaipanich, A.;
7:1:35:31     Dynamic analysis of sandwich cement-based piezoelectric composites
DOI:10.1016/j.compscitech.2012.02.021  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2012
  TC:5  AU: Han, Rong;Shi, Zhifei;
7:1:35:32     Fabrication and Electrical Properties of Lead Zirconate Titanate-Cement-Epoxy Composites
DOI:10.1080/00150193.2010.483194  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Rianyoi, R.;Potong, R.;Jaitanong, N.;Yimnirun, R.;Chaipanich, A.;
7:1:36:1     Effect of tetragonal distortion on ferroelectric domain switching: A case study on La-doped BiFeO3-PbTiO3 ceramics
DOI:10.1063/1.3445771  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:36  AU: Leist, Thorsten;Granzow, Torsten;Jo, Wook;Roedel, Juergen;
7:1:36:2     Enhanced piezoelectric and ferroelectric properties in the BaZrO3 substituted BiFeO3-PbTiO3
DOI:10.1063/1.4775763  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Fan, Longlong;Chen, Jun;Li, Sha;Kang, Huajun;Liu, Laijun;Fang, Liang;Xing, Xianran;
7:1:36:3     Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite-lead titanate
DOI:10.1063/1.3555599  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Leist, T.;Webber, K. G.;Jo, W.;Granzow, T.;Aulbach, E.;Suffner, J.;Roedel, J.;
7:1:36:4     The Role of Spontaneous Polarization in the Negative Thermal Expansion of Tetragonal PbTiO3-Based Compounds
DOI:10.1021/ja2046292  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:26  AU: Chen, Jun;Nittala, Krishna;Forrester, Jennifer S.;Jones, Jacob L.;Deng, Jinxia;Yu, Ranbo;Xing, Xianran;
7:1:36:5     Bi(Ni1/2Zr1/2)O-3-PbTiO3 relaxor-ferroelectric films for piezoelectric energy harvesting and electrostatic storage
DOI:10.1063/1.4884427  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Xie, Zhenkun;Yue, Zhenxing;Ruehl, Griffin;Peng, Bin;Zhang, Jie;Yu, Qi;Zhang, Xiaohua;Li, Longtu;
7:1:36:6     High piezoelectric performance and temperature dependence of fenoelectric and piezoelectric properties of Bi(Mg0.5Zr0.5)O-3-PbTiO3 near morphotropic phase boundary
DOI:10.1016/j.ceramint.2013.12.113  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Fan, Longlong;Chen, Jun;Wang, Qi;Deng, Jinxia;Yu, Ranbo;Xing, Xianran;
7:1:36:7     Large Piezoelectric Response and Polarization in Relaxor Ferroelectric PbTiO3Bi(Ni1/2Zr1/2)O3
DOI:10.1111/jace.12236  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Rong, Yangchun;Chen, Jun;Kang, Huajun;Liu, Laijun;Fang, Liang;Fan, Longlong;Pan, Zhao;Xing, Xianran;
7:1:36:8     Stress-induced structural changes in La-doped BiFeO3-PbTiO3 high-temperature piezoceramics
DOI:10.1016/j.actamat.2010.07.012  JN:ACTA MATERIALIA  PY:2010
  TC:12  AU: Leist, Thorsten;Webber, Kyle G.;Jo, Wook;Aulbach, Emil;Roedel, Juergen;Prewitt, Anderson D.;Jones, Jacob L.;Schmidlin, Josh;Hubbard, Camden R.;
7:1:36:9     Piezoelectric Ceramics with Compositions at the Morphotropic Phase Boundary in the BiFeO3-PbZrO3-PbTiO3 Ternary System
DOI:10.1111/j.1551-2916.2011.04715.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Hu, Wei;Tan, Xiaoli;Rajan, Krishna;
7:1:36:10     BiFeO3-PbZrO3-PbTiO3 ternary system for high Curie temperature piezoceramics
DOI:10.1016/j.jeurceramsoc.2010.11.015  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Hu, Wei;Tan, Xiaoli;Rajan, Krishna;
7:1:36:11     Temperature-independent ferroelectric property and characterization of high-T-C 0.2Bi(Mg1/2Ti1/2)O-3-0.8PbTiO(3) thin films
DOI:10.1063/1.4819205  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Zhang, Linxing;Chen, Jun;Zhao, Hanqing;Fan, Longlong;Rong, Yangchun;Deng, Jinxia;Yu, Ranbo;Xing, Xianran;
7:1:36:12     High piezoelectric performance in a new Bi-based perovskite of (1-x)Bi(Ni1/2Hf1/2)O-3-xPbTiO(3)
DOI:10.1063/1.4769405  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Pan, Zhao;Chen, Jun;Fan, Longlong;Liu, Laijun;Fang, Liang;Xing, Xianran;
7:1:36:13     Crystal Structure and Electrical Properties of Lead-Free (1-x) BaTiO3-x(Bi(1/2)A(1/2))TiO3 (A = Ag, Li, Na, K, Rb, Cs) Ceramics
DOI:10.1111/jace.12494  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:0  AU: Liu, Xiaoming;Tan, Xiaoli;
7:1:36:14     Structural evidence for the nonmonotonic trend of T-C in tetragonal PbTiO3-BiScO3 solid solutions
DOI:10.1063/1.3456389  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Chen, Jun;Nittala, Krishna;Jones, Jacob L.;Hu, Penghao;Xing, Xianran;
7:1:36:15     Microstructure and Electrical Properties of (1-x)Bi(Li1/3Zr2/3)O-3-xPbTiO(3) Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2010.03625.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Chen, Jun;Wang, Xiaowei;Jo, Wook;Roedel, Juergen;
7:1:36:16     Morphotropic phase boundary and electrical properties of lead-free (1-x)BaTiO3-xBi(Li1/3Ti2/3)O-3 ceramics
DOI:10.1063/1.3437215  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Ma, C.;Tan, X.;
7:1:36:17     Nanoindentation behaviour of nano BiFeO3
DOI:10.1016/j.ceramint.2011.09.011  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Sen, Pintu;Dey, Arjun;Mukhopadhyay, Anoop K.;Bandyopadhyay, S. K.;Himanshu, A. K.;
7:1:36:18     First-principles study on negative thermal expansion of PbTiO3
DOI:10.1063/1.4833280  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Wang, Fangfang;Xie, Ying;Chen, Jun;Fu, Honggang;Xing, Xianran;
7:1:37:1     Low dielectric loss and enhanced tunable properties of Mn-doped BST/MgO composites
DOI:10.1016/j.jallcom.2009.09.185  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:27  AU: Cui, Jiandong;Dong, Guixia;Yang, Zhimin;Du, Jun;
7:1:37:2     High tunability of pulsed laser deposited Ba0.7Sr0.3TiO3 thin films on perovskite oxide electrode
DOI:10.1016/j.jallcom.2011.02.074  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:11  AU: Reshmi, R.;Asha, A. S.;Krishnaprasad, P. S.;Jayaraj, M. K.;Sebastian, M. T.;
7:1:37:3     Energy storage properties in Ba0.4Sr0.6TiO3 ceramics with addition of semi-conductive BO-B2O3-SiO2-Na2CO3-K2CO3 glass
DOI:10.1016/j.jallcom.2014.08.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Wang, Tong;Jin, Li;Shu, Longlong;Hu, Qingyuan;Wei, Xiaoyong;
7:1:37:4     Microstructure and dielectric properties of highly tunable Ba0.6Sr0.4TiO3/MgO/Al2O3/ZnO composite
DOI:10.1016/j.jallcom.2011.12.105  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Hu, Guoxin;Gao, Feng;Liu, Liangliang;Xu, Bei;Liu, Zhengtang;
7:1:37:5     Effect of grain size on the energy storage properties of (Ba0.4Sr0.6)TiO3 paraelectric ceramics
DOI:10.1016/j.jeurceramsoc.2013.11.039  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:19  AU: Song, Zhe;Liu, Hanxing;Zhang, Shujun;Wang, Zhijian;Shi, Yatong;Hao, Hua;Cao, Minghe;Yao, Zhonghua;Yu, Zhiyong;
7:1:37:6     Effects of glass additions on the microstructure and dielectric properties of barium strontium titanate (BST) ceramics
DOI:10.1016/j.jeurceramsoc.2009.05.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:27  AU: Zhang, Dou;Button, Tim W.;Sherman, Vladimir O.;Tagantsev, Alexander K.;Price, Tim;Iddles, David;
7:1:37:7     Sol-gel synthesis and characterization of Ba(1-x)SrxTiO3 ceramics
DOI:10.1016/j.jallcom.2010.03.180  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Hao, Jigong;
7:1:37:8     Dielectric properties of Mg-doped Ba0.6Sr0.4TiO3 ceramics prepared by using sol-gel derived powders
DOI:10.1016/j.jallcom.2010.06.140  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:14  AU: Wang, Jiangying;Zhang, Jingji;Yao, Xi;
7:1:37:9     Dielectric and tunable properties of barium strontium titanate ceramics under the stresses
DOI:10.1016/j.jallcom.2011.06.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Zhang, Qiwei;Zhai, Jiwei;Yao, Xi;
7:1:37:10     Tunable dielectric properties of BaZr0.2Ti0.8O3-Mg2SiO4-MgO composite ceramics
DOI:10.1016/j.jallcom.2010.09.128  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: He, Yanyan;Xu, Yebin;Liu, Ting;Zeng, Chunlian;Chen, Wanping;
7:1:37:11     Microstructures and dielectric properties of Ba0.4Sr0.6TiO3 ceramics with BaO-TiO2-SiO2 glass-ceramics addition
DOI:10.1016/j.jallcom.2013.09.072  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Wu, Ting;Pu, Yongping;Zong, Tengteng;Gao, Pan;
7:1:37:12     The effect of MnO2-doping on the microstructure and microwave dielectric properties of BST/MgO composites
DOI:10.1016/j.jallcom.2014.06.129  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Xue, Qian;Du, Honglei;Gao, Xiaoyang;Wang, Yelong;Zhang, Yongcheng;Xu, Jie;Wang, Guibin;Ding, Qiming;Tian, Chong;Liu, Chunheng;Lu, Yueguang;Li, Shandong;
7:1:37:13     Peculiarities of temperature and field dependence of tunability in Ba0.6Sr0.4TiO3 ceramics with differing grain sizes
DOI:10.1016/j.jallcom.2011.03.047  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Zhai Jiwei;Chen, H.;Chou, C. C.;Raevskaya, S. I.;Prosandeev, S. A.;Raevski, I. P.;
7:1:37:14     Low temperature sintering and dielectric properties of Ba0.6Sr0.4TiO3-MgO composite ceramics with CaO-B2O3-SiO2 glass addition
DOI:10.1016/j.jallcom.2012.03.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Gao, Peng;Ji, Huiming;Jia, Qianqian;Li, Xiaolei;
7:1:37:15     Synthesis Ba0.6Sr0.4TiO3-ZnNb2O6 composite ceramics using chemical coating method
DOI:10.1016/j.jallcom.2010.05.116  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Wang, Tong;Gao, Feng;Hu, Guoxin;Tian, Changsheng;
7:1:37:16     Temperature-dependent Raman scattering of KTa(1-x)NbxO(3) thin films
DOI:10.1063/1.3455326  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Bartasyte, A.;Kreisel, J.;Peng, W.;Guilloux-Viry, M.;
7:1:37:17     Effects of Sr/Ti ratio on the microstructure and energy storage properties of nonstoichiometric SrTiO3 ceramics
DOI:10.1016/j.ceramint.2013.06.088  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:10  AU: Wang, Zhijian;Cao, Minghe;Yao, Zhonghua;Li, Guangyao;Song, Zhe;Hu, Wei;Hao, Hua;Liu, Hanxing;Yu, Zhiyong;
7:1:37:18     Bias Field Effect on the Dielectric and Pyroelectric Response of Single Crystal of Uniaxial Relaxor Sr0.75Ba0.25Nb2O6
DOI:10.1080/00150193.2012.743845  JN:FERROELECTRICS  PY:2012
  TC:5  AU: Raevskaya, S. I.;Lutokhin, A. G.;Pugachev, A. M.;Raevski, I. P.;Titov, V. V.;Zakharov, Yu. N.;Suzdalev, D. V.;Panchenko, E. M.;Prosandeev, S. A.;
7:1:37:19     Mg diffusion in K(Ta0.65Nb0.35)O-3 thin films grown on MgO evidenced by Auger electron spectroscopy investigation
DOI:10.1016/j.apsusc.2011.06.041  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:2  AU: Simon, Q.;Bouquet, V.;Demange, V.;Deputier, S.;Wyczisk, F.;Garry, G.;Ziaie, A.;Guilloux-Viry, M.;
7:1:37:20     Dielectric Properties at Microwaves Frequencies of (Ni, Ti, La, Mg)-Doped Ba0.3Sr0.7TiO3 Thin Films Deposited onHigh-Resistivity Silicon Substrates
DOI:10.1111/j.1551-2916.2011.04546.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Ponchel, Freddy;Remiens, Denis;Midy, Jean;Legier, Jean-Fancois;Soyer, Caroline;Lasri, Tuami;Guegan, Guillaume;
7:1:37:21     A unified equation for predicting the dielectric constant of a two phase composite
DOI:10.1063/1.4865094  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: He, Hua;Xu, Yebin;
7:1:37:22     The Effect of ZnO-B2O3-SiO2 Additive on Sintering and Dielectric Properties of Ba0.3Sr0.7TiO3 Ceramics
DOI:10.1080/00150191003748444  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Li, Y. Q.;Liu, H. X.;Yao, Z. H.;Xu, J.;Cui, Y. J.;Cao, M. H.;Hao, H.;Yu, Z. Y.;
7:1:38:1     Grain Size-Dependent Properties of Dense Nanocrystalline Barium Titanate Ceramics
DOI:10.1111/j.1551-2916.2012.05409.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:12  AU: Curecheriu, Lavinia;Balmus, Sorin-Bogdan;Buscaglia, Maria Teresa;Buscaglia, Vincenzo;Ianculescu, Adelina;Mitoseriu, Liliana;
7:1:38:2     Field-dependent permittivity in nanostructured BaTiO3 ceramics: Modeling and experimental verification
DOI:10.1103/PhysRevB.85.224111  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Padurariu, Leontin;Curecheriu, Lavinia;Buscaglia, Vincenzo;Mitoseriu, Liliana;
7:1:38:3     High temperature piezoelectric BiScO3-PbTiO3 synthesized by mechanochemical methods
DOI:10.1016/j.actamat.2011.10.050  JN:ACTA MATERIALIA  PY:2012
  TC:12  AU: Alguero, M.;Ramos, P.;Jimenez, R.;Amorin, H.;Vila, E.;Castro, A.;
7:1:38:4     Nanostructured ceramics of BiScO3-PbTiO3 with tailored grain size by spark plasma sintering
DOI:10.1016/j.scriptamat.2010.09.023  JN:SCRIPTA MATERIALIA  PY:2011
  TC:11  AU: Hungria, T.;Amorin, H.;Alguero, M.;Castro, A.;
7:1:38:5     Spark plasma sintering of nanocrystalline BaTiO3-powders: Consolidation behavior and dielectric characteristics
DOI:10.1016/j.jeurceramsoc.2011.03.035  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Yoon, Songhak;Dornseiffer, Juergen;Xiong, Yan;Gruener, Daniel;Shen, Zhijian;Iwaya, Shoichi;Pithan, Christian;Waser, Rainer;
7:1:38:6     Design tunable materials: Ferroelectric-antiferroelectric composite with core-shell structure
DOI:10.1063/1.4905036  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Curecheriu, Lavinia-Petronela;Buscaglia, Maria Teresa;Maglia, Filippo;Anselmi-Tamburini, Umberto;Buscaglia, Vincenzo;Mitoseriu, Liliana;
7:1:38:7     Preparation of BaTiO3/low melting glass core-shell nanoparticles for energy storage capacitor applications
DOI:10.1039/c4ta04282d  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:3  AU: Su, Xiaofeng;Riggs, Brian C.;Tomozawa, Minoru;Nelson, J. Keith;Chrisey, Douglas B.;
7:1:38:8     From core-shell BaTiO3@MgO to nanostructured low dielectric loss ceramics by spark plasma sintering
DOI:10.1039/c3tc31990c  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:6  AU: Berthelot, Romain;Basly, Brice;Buffiere, Sonia;Majimel, Jerome;Chevallier, Geoffroy;Weibel, Alicia;Veillere, Amelie;Etienne, Laetitia;Chung, U-Chan;Goglio, Graziella;Maglione, Mario;Estournes, Claude;Mornet, Stephane;Elissalde, Cathy;
7:1:38:9     Monoclinic symmetry of twin-free nanocrystals in the BiScO3-PbTiO3 solid solution as revealed by aberration-corrected TEM
DOI:10.1103/PhysRevB.81.100102  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Hungria, Teresa;Houdellier, Florent;Alguero, Miguel;Castro, Alicia;
7:1:38:10     Fe2O3@BaTiO3 Core-Shell Particles as Reactive Precursors for the Preparation of Multifunctional Composites Containing Different Magnetic Phases
DOI:10.1021/cm1011982  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:18  AU: Buscaglia, Maria Teresa;Buscaglia, Vincenzo;Curecheriu, Lavinia;Postolache, Petronel;Mitoseriu, Liliana;Ianculescu, Adelina C.;Vasile, Bogdan S.;Zhe, Zhao;Nanni, Paolo;
7:1:38:11     Nanostructuring Effects in Piezoelectric BiScO3-PbTiO3 Ceramics
DOI:10.1111/jace.13000  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Amorin, Harvey;Jimenez, Ricardo;Deluca, Marco;Ricote, Jesus;Hungria, Teresa;Castro, Alicia;Alguero, Miguel;
7:1:38:12     Local characterization of nanostructured high sensitivity piezoelectric BiScO3-PbTiO3 ceramics by piezoresponse force microscopy
DOI:10.1063/1.4896731  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Salazar, Norberto;Alguero, Miguel;Amorin, Harvey;Castro, Alicia;Gil, Adriana;Ricote, Jesus;
7:1:38:13     Grain boundary region and local piezoelectric response of BiScO3-PbTiO3 nanoceramics prepared by combination of SPS and two-step sintering
DOI:10.1016/j.jeurceramsoc.2014.02.038  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Zhang, Shaopeng;Wang, Xiaohui;Wang, Han;Li, Longtu;
7:1:38:14     Low sintering of X7R ceramics based on barium titanate with SiO2-B2O3-Li2O sintering additives in reducing atmosphere
DOI:10.1016/j.ceramint.2011.04.047  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Sun, Changku;Wang, Xiaohui;Li, Longtu;
7:1:38:15     Nanopowders of ferroic oxides for magnetoelectric composites
DOI:10.1007/s11051-011-0363-6  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:3  AU: Amorin, Harvey;Hungria, Teresa;Landa-Canovas, Angel R.;Torres, Maria;Dolle, Mickael;Alguero, Miguel;Castro, Alicia;
7:1:38:16     Novel magnetoelectric ceramic composites by control of the interface reactions in Fe2O3@BaTiO3 core-shell structures
DOI:10.1063/1.4893896  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Curecheriu, Lavinia;Postolache, Petronel;Buscaglia, Maria Teresa;Buscaglia, Vincenzo;Ianculescu, Adelina;Mitoseriu, Liliana;
7:1:38:17     Semi-quantitative analysis for FTIR spectra of Al2O3-PbO-B2O3-SiO2 glasses
DOI:10.1016/j.jnoncrysol.2011.10.037  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2012
  TC:4  AU: Mansour, E.;
7:1:38:18     Temperature dependences of the ferroelectric and dielectric properties of high curie temperature PbTiO3-BiScO3-Bi(Zn1/2Zr1/2)O-3
DOI:10.1016/j.materresbull.2013.02.002  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Kang, Huajun;Chen, Jun;Liu, Laijun;Fang, Liang;Xing, Xianran;
7:1:38:19     Preparation and Characterization of Silica-Coated CaCu3Ti4O12
DOI:10.1007/s11664-014-3156-8  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:1  AU: Wang, Mao-Hua;Zhang, Bo;Zhou, Fu;
7:1:38:20     Ferroelectric DomainWall as Stretched Membrane: Nonlinear Dielectric Response and Tunability
DOI:10.1080/00150193.2014.889539  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Jimenez, R. P.;Rino, J. P.;Eiras, J. A.;
7:1:38:21     Effect of grain size on phase transition, dielectric and pyroelectric properties of BST ceramics
DOI:10.1016/j.jeurceramsoc.2014.04.005  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Mao, Chaoliang;Yan, Shiguang;Cao, Sheng;Yao, Chunhua;Cao, Fei;Wang, Genshui;Dong, Xianlin;Hu, Xu;Yang, Chunli;
7:1:38:22     The Route for Synthesis of Agglomeration-Free Barium Strontium Titanate Nanoparticles Using Ultrasonic Spray Nozzle System
DOI:10.1111/j.1551-2916.2009.03556.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Yoon, Songhak;Kim, Kyuyeon;Baik, Sunggi;
7:1:39:1     Microstructure development and piezoelectric properties of highly textured CuO-doped KNN by templated grain growth
DOI:10.1557/JMR.2010.0084  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:27  AU: Chang, Yunfei;Poterala, Stephen F.;Yang, Zupei;Trolier-McKinstry, Susan;Messing, Gary L.;
7:1:39:2     Mechanistic Interpretation of the Aurivillius to Perovskite Topochemical Microcrystal Conversion Process
DOI:10.1021/cm903315u  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:30  AU: Poterala, Stephen F.;Chang, Yunfei;Clark, Trevor;Meyer, Richard J., Jr.;Messing, Gary L.;
7:1:39:3     Processing and mechanical response of highly textured Al2O3
DOI:10.1016/j.jeurceramsoc.2010.02.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Pavlacka, Robert J.;Messing, Gary L.;
7:1:39:4     In Situ Observations of Templated Grain Growth in (Na0.5K0.5)(0.98)Li0.02NbO3 Piezoceramics: Texture Development and Template-Matrix Interactions
DOI:10.1111/j.1551-2916.2012.05268.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Tutuncu, Goknur;Chang, Yunfei;Poterala, Stephen;Messing, Gary L.;Jones, Jacob L.;
7:1:39:5     One-Step Surfactant-Free Hydrothermal Synthesis of Platelike Sodium Niobate Template Powders
DOI:10.1111/jace.13237  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Gu, Qilin;Zhu, Kongjun;Liu, Jinsong;Wang, Jing;Liu, Pengcheng;Sun, Qiaomei;Qiu, Jinhao;
7:1:39:6     Piezoelectric K0.5Na0.5NbO3 Ceramics Textured Using Needlelike K0.5Na0.5NbO3 Templates
DOI:10.1111/jace.13223  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Haugen, Astri Bjornetun;Olsen, Gerhard Henning;Madaro, Francesco;Morozov, Maxim I.;Tutuncu, Goknur;Jones, Jacob L.;Grande, Tor;Einarsrud, Mari-Ann;
7:1:39:7     Microstructure Development in < 001 >-Oriented ( K,Na)NbO3-based Ceramics
DOI:10.1080/00150193.2013.822775  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Kikuchihara, Anna;Kimura, Toshio;
7:1:39:8     A critical evaluation of reactive templated grain growth (RTGG) mechanisms in highly [001] textured Sr0.61Ba0.39Nb2O6 ferroelectric-thermoelectrics
DOI:10.1557/jmr.2011.379  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:5  AU: Chang, Yunfei;Lee, Soonil;Poterala, Stephen;Randall, Clive A.;Messing, Gary L.;
7:1:39:9     Low-field dynamic magnetic alignment and templated grain growth of diamagnetic PMN-PT ceramics
DOI:10.1557/jmr.2013.303  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:1  AU: Poterala, Stephen F.;Meyer, Richard J., Jr.;Messing, Gary L.;
7:1:39:10     Analysis methods for characterizing ferroelectric/ferroelastic domain reorientation in orthorhombic perovskite materials and application to Li-doped Na0.5K0.5NbO3
DOI:10.1007/s10853-013-7495-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:4  AU: Iamsasri, Thanakorn;Tutuncu, Goknur;Uthaisar, Chunmanus;Pojprapai, Soodkhet;Jones, Jacob L.;
7:1:39:11     Approaches for preparing < 1 1 1 >-textured Bi0.5Na0.5TiO3-based ceramics by hetero-templated grain growth
DOI:10.1016/j.ceramint.2012.03.013  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Negishi, Yuka;Kimura, Toshio;
7:1:39:12     Fabrication of Highly Textured Fine-Grained alpha-Alumina by Templated Grain Growth of Nanoscale Precursors
DOI:10.1111/jace.12286  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Chang, Yunfei;Poterala, Stephen;Yener, Doruk;Messing, Gary L.;
7:1:39:13     Evolution of crystallographic grain orientation and anisotropic properties of (K0.5Na0.5)NbO3 ceramics using BaTiO3 templates by reactive templated grain growth
DOI:10.1016/j.jallcom.2013.01.048  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Lv, Danya;Zuo, Ruzhong;
7:1:39:14     Synthesis and characterization of (001) oriented BaTiO3 platelets through a topochemical conversion
DOI:10.1016/j.powtec.2011.09.045  JN:POWDER TECHNOLOGY  PY:2012
  TC:11  AU: Su, Shi;Zuo, Ruzhong;Lv, Danya;Fu, Jian;
7:1:39:15     Preparation and Characteristics of Bi0.5Na0.5TiO3 Single-Crystalline Films by a Solid-State Process
DOI:10.1111/j.1551-2916.2011.04569.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Ijuu, Daiji;Kimura, Toshio;Yamada, Tomoaki;Funakubo, Hiroshi;
7:1:39:16     Synthesis of High Aspect Ratio PbBi4Ti4O15 and Topochemical Conversion to PbTiO3-Based Microplatelets
DOI:10.1111/j.1551-2916.2010.04369.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Poterala, Stephen F.;Meyer, Richard J., Jr.;Messing, Gary L.;
7:1:39:17     Templated Grain Growth in Macroporous Materials
DOI:10.1111/jace.12976  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Bouville, Florian;Portuguez, Etienne;Chang, Yunfei;Messing, Gary L.;Stevenson, Adam J.;Maire, Eric;Courtois, Loic;Deville, Sylvain;
7:1:39:18     Effect of green density on the templated-grain growth in CuO-doped (K,Na)NbO3 ceramics
DOI:10.1016/j.ceramint.2014.05.036  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Choi, Jin Hong;Kim, Jeong Seog;Han, Seung Ho;Kang, Hyung-Won;Lee, Hyeung-Gyu;Cheon, Chae Il;
7:1:39:19     Fabrication and electrical properties of 0.94Na(0.5)Bi(0.5)TiO(3)-0.06BaTiO(3) textured ceramics by RTGG method using micrometer sized BaTiO3 plate-like templates
DOI:10.1016/j.jallcom.2012.02.090  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:1  AU: Su, Shi;Zuo, Ruzhong;
7:1:39:20     Preparation of Platelike NaNbO3 Particles by Single-Step Molten Salt Synthesis
DOI:10.1111/j.1551-2916.2012.05095.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:11  AU: Kikuchihara, Anna;Sakurai, Fumito;Kimura, Toshio;
7:1:39:21     Role of Alumina in the Preparation of Platelike NaNbO3 Powder by Molten Salt Synthesis and Proposal of New Preparation Method
DOI:10.1111/jace.12399  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Ishii, Keisuke;Tashiro, Shinjiro;Kikuchihara, Anna;Kimura, Toshio;
7:1:39:22     Synthesis of high aspect ratio platelike Ba1-xCaxTiO3 particles by topochemical microcrystal conversion method
DOI:10.1016/j.ceramint.2013.10.085  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Yan, Xiaobin;Gao, Feng;Liu, Zhengtang;
7:1:39:23     Tailoring of Grain Size in Textured CaBi4Ti4O15 Ceramics Prepared by Templated Grain Growth Process
DOI:10.1111/j.1551-2916.2012.05400.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Tamura, Ken;Kimura, Toshio;
7:1:39:24     Synthesis and toughening behavior of bio-inspired nanocrystalline TiO2/polyelectrolyte nanolayered composites
DOI:10.1016/j.materresbull.2013.10.019  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Tan, H. F.;Zhang, B.;Yan, J. W.;Sun, X. D.;Zhang, G. P.;
7:1:39:25     {111}-Textured BaTiO3 ceramics elaborated by Templated Grain Growth using NaNbO3 templates
DOI:10.1016/j.matlet.2013.09.071  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Kamlo, A. Ngueteu;Geffroy, P. M.;Pham-Thi, M.;Marchet, P.;
7:1:40:1     Multiferroic ferrite/perovskite oxide core/shell nanostructures
DOI:10.1039/c0jm02602f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:27  AU: Liu, Rongzheng;Zhao, Yuzhen;Huang, Rongxia;Zhao, Yongjie;Zhou, Heping;
7:1:40:2     Influence of Rare-Earth Dopants on Barium Titanate Ceramics Microstructure and Corresponding Electrical Properties
DOI:10.1111/j.1551-2916.2009.03309.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:27  AU: Mitic, Vojislav V.;Nikolic, Zoran S.;Pavlovic, Vladimir B.;Paunovic, Vesna;Miljkovic, Miroslav;Jordovic, Branka;Zivkovic, Ljiljana;
7:1:40:3     Preparation of BME MLCC Powders by Aqueous Chemical Coating Method
DOI:10.1111/j.1551-2916.2011.04543.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:13  AU: Zhang, Yichi;Wang, Xiaohui;Tian, Zhibin;Hur, Kang-Heon;Li, Longtu;
7:1:40:4     Formation of Core-Shell Structure in Ultrafine-Grained BaTiO3-Based Ceramics Through Nanodopant Method
DOI:10.1111/j.1551-2916.2009.03371.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:18  AU: Tian, Zhibin;Wang, Xiaohui;Zhang, Yichi;Fang, Jian;Song, Tae-Ho;Hur, Kang Heon;Lee, Seungju;Li, Longtu;
7:1:40:5     Electrical and reliability characteristics of Mn-doped nano BaTiO3-based ceramics for ultrathin multilayer ceramic capacitor application
DOI:10.1063/1.4768892  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Gong, Huiling;Wang, Xiaohui;Zhang, Shaopeng;Tian, Zhibin;Li, Longtu;
7:1:40:6     Polymorphism and dielectric properties of Sc-doped BaTiO3 nanopowders synthesized by sol-gel method
DOI:10.1016/j.materresbull.2013.02.044  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:8  AU: Xin, Cheng-Rong;Zhang, Jian;Liu, Yang;Zhang, Qi-Long;Yang, Hui;Cheng, Di;
7:1:40:7     High Performance BaTiO3-Based BME-MLCC Nanopowder Prepared by Aqueous Chemical Coating Method
DOI:10.1111/j.1551-2916.2011.05038.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:11  AU: Zhang, Yichi;Wang, Xiaohui;Kim, Jin-Yong;Tian, Zhibin;Fang, Jian;Hur, Kang-Heon;Li, Longtu;
7:1:40:8     Fabrication, structure and property of BaTiO3-based dielectric ceramics with a multilayer core-shell structure
DOI:10.1016/j.scriptamat.2012.05.046  JN:SCRIPTA MATERIALIA  PY:2012
  TC:4  AU: Hao, Hua;Liu, Hanxing;Zhang, Shujun;Xiong, Bo;Shu, Xin;Yao, Zhonghua;Cao, Minghe;
7:1:40:9     Fabrication of submicron La2O3-coated BaTiO3 particles and fine-grained ceramics with temperature-stable dielectric properties
DOI:10.1016/j.scriptamat.2014.07.014  JN:SCRIPTA MATERIALIA  PY:2014
  TC:1  AU: Wang, Yan;Cui, Bin;Liu, Yu;Zhao, Xiaotong;Hu, Zhenyu;Yan, Qiangqiang;Wu, Tong;Zhao, Lili;Wang, Yaoyu;
7:1:40:10     Effects of Sn on the microstructure and dielectric properties in BaTiO3-based ceramics
DOI:10.1016/j.ceramint.2012.10.195  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Wang, Jing;Jiang, Shenglin;Jiang, Dan;Wang, Tingwei;Yao, Hao;
7:1:40:11     Low temperature sintering of high permittivity BaTiO3 based X8R ceramics doped with Li2O-Bi2O3-B2O3 frit
DOI:10.1016/j.matlet.2013.09.051  JN:MATERIALS LETTERS  PY:2013
  TC:0  AU: Hu, Zhenyu;Cui, Bin;Jing, Shuai;Wang, Yaoyu;
7:1:40:12     A study of exchange bias in BiFeO3 core/NiFe2O4 shell nanoparticles
DOI:10.1063/1.4803549  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Yusuf, S. M.;Manna, P. K.;Shirolkar, Mandar M.;Kulkarni, S. K.;Tewari, R.;Dey, G. K.;
7:1:40:13     Grain size effect on electrical and reliability characteristics of modified fine-grained BaTiO3 ceramics for MLCCs
DOI:10.1016/j.jeurceramsoc.2013.12.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Gong, Ling;Wang, Xiaohui;Zhang, Shaopeng;Wen, Hai;Li, Longtu;
7:1:40:14     Microstructural design of BaTiO3-based ceramics for temperature-stable multilayer ceramic capacitors
DOI:10.1016/j.ceramint.2012.04.036  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:12  AU: Wang, Jing;Jiang, Shenglin;Jiang, Dan;Tian, Jiajia;Li, Yunlong;Wang, Yue;
7:1:40:15     Uniform Coating of BaTiO3-Dy2O3-SiO2 Compound Nano Layer on Ni Particles for MLCC Electrode
DOI:10.1111/jace.12228  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Zhang, Yichi;Wang, Xiaohui;Kim, Jin-yong;Kim, Jeong-Ryeol;Hur, Kang-Heon;Li, Longtu;
7:1:40:16     Core-Shell Structure in Nanocrystalline Modified BaTiO3 Dielectric Ceramics Prepared by Different Sintering Methods
DOI:10.1111/j.1551-2916.2010.04357.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Tian, Zhibin;Wang, Xiaohui;Gong, Huiling;Song, Tae-Ho;Hur, Kang Heon;Liz, Longtu;
7:1:40:17     Microstructure Evolution and Dielectric Properties of Ultrafine Grained BaTiO3-Based Ceramics by Two-Step Sintering
DOI:10.1111/j.1551-2916.2010.04234.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Tian, Zhibin;Wang, Xiaohui;Lee, Seungju;Hur, Kang Heon;Li, Longtu;
7:1:40:18     A Novel Approach to the Preparation of a Highly Crystallized BaTiO3 Layer on Ni Nanoparticles
DOI:10.1111/jace.12506  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Hao, Yanan;Wang, Xiaohui;Zhang, Hui;Zhang, Yichi;Li, Longtu;
7:1:40:19     Dielectric behaviors of Nb2O5-Co2O3 doped BaTiO3-Bi(Mg1/2Ti1/2)O-3 ceramics
DOI:10.1016/j.ceramint.2011.04.046  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Xiong, Bo;Hao, Hua;Zhang, Shujun;Liu, Hanxing;Cao, Minghe;Yu, Zhiyong;
7:1:40:20     Effect of Dysprosium Oxide Addition on the Microstructure and Dielectric Properties of BaTiO3 Ceramics
DOI:10.3365/eml.2010.12.145  JN:ELECTRONIC MATERIALS LETTERS  PY:2010
  TC:8  AU: Kang, Do Won;Park, Tae Gone;Kim, Jung Woo;Kim, Jin Seong;Lee, Hee Soo;Cho, Hyun;
7:1:41:1     Wavelength dependence of refractive index in lead-free Na0.5Bi0.5 TiO3-BaTiO3 single crystals
DOI:10.1016/j.optmat.2013.12.037  JN:OPTICAL MATERIALS  PY:2014
  TC:6  AU: He, Chongjun;Yi, Xiujie;Wu, Tong;Wang, Jiming;Zhu, Kongjun;Liu, Youwen;
7:1:41:2     Dielectric, electromechanical coupling properties of Mn-doped Na0.5Bi0.5TiO3-BaTiO3 lead-free single crystal
DOI:10.1007/s00339-010-5994-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:9  AU: Sun, Renbing;Zhang, Qinhui;Fang, Bijun;Jiao, Jie;Li, Xiaobing;Zhao, Xiangyong;Lin, Di;Wang, Dong;Luo, Haosu;
7:1:41:3     Dielectric, ferroelectric, piezoelectric, and electrostrictive properties of K0.5Na0.5NbO3 single crystals
DOI:10.1063/1.3291119  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:24  AU: Ursic, Hana;Bencan, Andreja;Skarabot, Miha;Godec, Matjaz;Kosec, Marija;
7:1:41:4     Piezoelectric energy harvesting using shear mode 0.71Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) single crystal cantilever
DOI:10.1063/1.3327330  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Ren, Bo;Or, Siu Wing;Zhang, Yaoyao;Zhang, Qinhui;Li, Xiaobing;Jiao, Jie;Wang, Wei;Liu, Da'an;Zhao, Xiangyong;Luo, Haosu;
7:1:41:5     Growth and characterization of lead-free Ba(1-x)CaxZryO3 single crystal
DOI:10.1016/j.jcrysgro.2012.01.009  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:5  AU: Zeng, Yiming;Zheng, Yanqing;Tu, Xiaoniu;Lu, Zhiping;Shi, Erwei;
7:1:41:6     Growth and electric properties of 0.96Na(0.5)Bi(0.5)TiO(3)-0.04BaTiO(3) single crystal
DOI:10.1016/j.jcrysgro.2009.11.006  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:18  AU: Zhang, Qinhui;Zhang, Yaoyao;Wang, Feifei;Lin, Di;Li, Xiaobing;Zhao, Xiangyong;Luo, Haosu;
7:1:41:7     Growth of (K0.5Na0.5)NbO3-SrTiO3 lead-free piezoelectric single crystals by the solid state crystal growth method and their characterization
DOI:10.1016/j.ceramint.2013.09.122  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Farooq, Muhammad Umer;Fisher, John G.;
7:1:41:8     Complete set of material constants of 0.95(Na0.5Bi0.5)TiO3-0.05BaTiO(3) lead-free piezoelectric single crystal and the delineation of extrinsic contributions
DOI:10.1063/1.4821853  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Zheng, Limei;Yi, Xiujie;Zhang, Shantao;Jiang, Wenhua;Yang, Bin;Zhang, Rui;Cao, Wenwu;
7:1:41:9     Growth of lead-free piezoelectric 0.45BZT-0.55BCT single crystal and investigation of dielectric, polarization and birefringence properties
DOI:10.1016/j.jcrysgro.2013.04.033  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:5  AU: Bhaumik, Indranil;Singh, Gurvinderjit;Ganesamoorthy, S.;Bhatt, R.;Karnal, A. K.;Tiwari, V. S.;Gupta, P. K.;
7:1:41:10     Growth and orientation dependence of electrical properties of 0.92Na(0.5)Bi(0.5)TiO(3)-0.08 K0.5Bi0.5TiO3 lead-free piezoelectric single crystal
DOI:10.1063/1.3601116  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Sun, Renbing;Zhao, Xiangyong;Zhang, Qinhui;Fang, Bijun;Zhang, Haiwu;Li, Xiaobing;Lin, Di;Wang, Sheng;Luo, Haosu;
7:1:41:11     Growth and characterization of undoped and Mn doped lead-free piezoelectric NBT-KBT single crystals
DOI:10.1016/j.materresbull.2014.02.017  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Babu, G. Anandha;Raja, R. Subramaniyan;Bhaumik, Indranil;Ganesamoorthy, S.;Ramasamy, P.;Gupta, P. K.;
7:1:41:12     Growth and investigation of 0.80Na(0.5)Bi(0.5)TiO(3)-0.20K(0.5)Bi(0.5)TiO(3) lead-free single crystal
DOI:10.1016/j.mseb.2014.02.021  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:0  AU: Babu, G. Anandha;Raja, R. Subramaniyan;Bhaumik, Indranil;Ganesamoorthy, S.;Ramasamy, P.;Gupta, P. K.;
7:1:41:13     Solid state growth of Na1/2Bi1/2TiO3-BaTiO3 single crystals and their enhanced piezoelectric properties
DOI:10.1016/j.jcrysgro.2011.01.023  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:14  AU: Moon, Kyoung-Seok;Rout, Dibyaranjan;Lee, Ho-Yong;Kang, Suk-Joong L.;
7:1:41:14     Dielectric properties, thermal expansion and heat capacity of (1-x)Na0.5Bi0.5TiO3-xBaTiO(3) single crystals (x=0, 0.02, 0.025, 0.0325 and 0.05)
DOI:10.1016/j.mseb.2013.04.011  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Suchanicz, J.;Kruzina, T. V.;
7:1:41:15     Growth of potassium niobate micro-hexagonal tablets with monoclinic phase and its excellent piezoelectric property
DOI:10.1016/j.jcrysgro.2012.05.018  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:1  AU: Chen, Zhong;Huang, Jingyun;Wang, Ye;Yang, Yefeng;Wu, Yongjun;Ye, Zhizhen;
7:1:41:16     Pyroelectric properties of Mn-doped 94.6Na(0.5)Bi(0.5)TiO(3)-5.4BaTiO(3) lead-free single crystals
DOI:10.1063/1.4866327  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Sun, Renbing;Wang, Jinzhi;Wang, Fang;Feng, Tangfu;Li, Yanlong;Chi, Zhenhua;Zhao, Xiangyong;Luo, Haosu;
7:1:41:17     Electric properties of Mn doped 0.95Na(0.5)Bi(0.5)TiO(3)-0.05BaTiO(3) crystal after different annealing processes
DOI:10.1016/j.jcrysgro.2010.10.186  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:4  AU: Zhang, Qinhui;Li, Xiaobing;Sun, Renbing;Wu, Xiao;Ren, Bo;Zhao, Xiangyong;Luo, Haosu;
7:1:41:18     The fabrication of vanadium-doped ZnO piezoelectric nanofiber by electrospinning
DOI:10.1088/0957-4484/21/5/055708  JN:NANOTECHNOLOGY  PY:2010
  TC:15  AU: Chen, Y. Q.;Zheng, X. J.;Feng, X.;
7:1:41:19     Growth and electrical properties of 0.88Na(0.5)Bi(0.5)TiO(3)-0.12K(0.5)Bi(0.5)TiO(3) lead-free piezoelectric single crystal
DOI:10.1007/s00339-012-7276-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Sun, Renbing;Zhang, Haiwu;Wang, Jinzhi;Wang, Fang;Fang, Bijun;Zhao, Xiangyong;Luo, Haosu;
7:1:41:20     Growth and electrical properties of 0.95Na(0.5)Bi(0.5)TiO(3)-0.05K(0.5)Bi(0.5)TiO(3) lead-free piezoelectric crystal by the TSSG method
DOI:10.1016/j.jcrysgro.2011.12.073  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:4  AU: Sun, Renbing;Li, Xiaobing;Zhang, Qinhui;Fang, Bijun;Zhang, Haiwu;Lin, Di;Wang, Sheng;Zhao, Xiangyong;Luo, Haosu;
7:1:41:21     Flux growth and characterization of lead-free Sodium Bismuth Titanate-Barium Titanate single crystals
DOI:10.1010/j.jcrysgro.2013.12.034  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:0  AU: Aravinth, K.;Babu, G. Anandha;Ramasamy, P.;
7:1:42:1     Effect of hafnium on the microstructure, dielectric and ferroelectric properties of Ba[Zr0.2Ti0.8]O-3 ceramics
DOI:10.1016/j.ceramint.2011.12.047  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:24  AU: Cai, Wei;Fu, Chunlin;Gao, Jiacheng;Lin, Zebin;Deng, Xiaoling;
7:1:42:2     Phase transition characteristics and dielectric properties of rare-earth (La, Pr, Nd, Gd) doped Ba(Zr0.09Ti0.91)O-3 ceramics
DOI:10.1016/j.matchemphys.2010.10.027  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:26  AU: Diez-Betriu, X.;Garcia, J. E.;Ostos, C.;Boya, A. U.;Ochoa, D. A.;Mestres, L.;Perez, R.;
7:1:42:3     Electrical properties and high figure-of-merit of dielectric tunable (1-x) Ba(Zr0.25Ti0.75) O3-xMgO thick films prepared by tape-casting
DOI:10.1016/j.jallcom.2013.11.083  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Wang, Yan;Fan, Huiqing;Peng, Biaolin;Ren, Pengrong;
7:1:42:4     Structural and dielectric relaxor properties of yttrium-doped Ba(Zr0.25Ti0.75)O-3 ceramics
DOI:10.1016/j.matchemphys.2010.01.008  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:19  AU: Badapanda, T.;Rout, S. K.;Cavalcante, L. S.;Sczancoski, J. C.;Panigrahi, S.;Sinha, T. P.;Longo, E.;
7:1:42:5     Local electronic structure, optical bandgap and photoluminescence (PL) properties of Ba(Zr0.75Ti0.25) O-3 powders
DOI:10.1016/j.mssp.2012.12.010  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2013
  TC:8  AU: Cavalcante, L. S.;Batista, N. C.;Badapanda, T.;Costa, M. G. S.;Li, M. S.;Avansi, W.;Mastelaro, V. R.;Longo, E.;Espinosa, J. W. M.;Gurgel, M. F. C.;
7:1:42:6     Electrical properties and microwave dielectric behavior of holmium substituted barium zirconium titanate ceramics
DOI:10.1016/j.jallcom.2012.05.091  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Sagar, Raghavendra;Hudge, Pravin;Madolappa, Shivanand;Kumbharkhane, A. C.;Raibagkar, R. L.;
7:1:42:7     Structural investigation and improvement of photoluminescence properties in Ba(ZrxTi1-x)O-3 powders synthesized by the solid state reaction method
DOI:10.1016/j.matchemphys.2013.06.041  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:7  AU: Parida, S.;Rout, S. K.;Cavalcante, L. S.;Simoes, A. Z.;Barhai, P. K.;Batista, N. C.;Longo, E.;Li, M. Siu;Sharma, S. K.;
7:1:42:8     Dielectric relaxation on Ba1-xBi2x/3Zr0.25Ti0.75O3 ceramic
DOI:10.1016/j.matchemphys.2012.01.108  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:9  AU: Badapanda, T.;Senthil, V.;Rout, S. K.;Panigrahi, S.;Sinha, T. P.;
7:1:42:9     Structural and dielectric relaxor properties of A-site deficient samarium-doped (Ba1-x Sm-2x/3)(Zr0.3Ti0.7O3) ceramics
DOI:10.1007/s10853-014-8256-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:3  AU: Ghosh, S. K.;Ganguly, M.;Rout, S. K.;Sinha, T. P.;
7:1:42:10     Influence of rare-earth addition on dielectric properties and relaxor behavior of barium zirconium titanate thin films
DOI:10.1063/1.3330753  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Gao, Lina;Zhai, Jiwei;Zhang, Yewen;Yao, Xi;
7:1:42:11     Processing optimization and piezoelectric properties of textured Ba(Zr,Ti)O-3 ceramics
DOI:10.1016/j.jallcom.2012.04.097  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Bai, Wangfeng;Hao, Jigong;Shen, Bo;Fu, Fang;Zhai, Jiwei;
7:1:42:12     Composition dependence of structural and optical properties of Ba(ZrxTi1-x)O-3 thin films grown on MgO substrates by pulsed Laser deposition
DOI:10.1016/j.tsf.2011.04.007  JN:THIN SOLID FILMS  PY:2011
  TC:8  AU: Xin, J. Z.;Leung, C. W.;Chan, H. L. W.;
7:1:42:13     Influence of MgO and ZrO2 buffer layers on dielectric properties of Ba(Zr0.20Ti0.80)O-3 thin films prepared by sol-gel processing
DOI:10.1016/j.apsusc.2010.10.132  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:3  AU: Gao, L. N.;Zhai, J. W.;Yao, X.;
7:1:42:14     Influence of Pr dopant on the dielectric properties and Curie temperatures of Ba1-3x Pr-2x Ti0.95Sn0.05O3 (0.01a parts per thousand currency signxa parts per thousand currency sign0.05) ceramics
DOI:10.1007/s00339-013-7760-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Rhouma, F. I. H.;Dhahri, A.;Dhahri, J.;Valente, M. A.;Khirouni, K.;
7:1:42:15     The phase structure, electrical properties, and correlated characterizations of (Mn, Sb) co-tuned PZMnNS-PZT ceramics with relaxation behavior near the morphotropic phase boundary
DOI:10.1016/j.ceramint.2014.03.185  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Tsai, Cheng-Che;Chu, Sheng-Yuan;Jiang, Jiann-Sheng;Hong, Cheng-Shong;Chiu, Yun-Fang;
7:1:42:16     Effects of BaO-SiO2 glass particle size on the microstructures and dielectric properties of Mn-doped Ba(Ti, Zr)O-3 ceramics
DOI:10.1016/j.jeurceramsoc.2009.11.006  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Jain, Ting-An;Fung, Kuan-Zong;Hsiao, Shawn;Chan, Johnny;
7:1:42:17     (Sr1-xPbx)TiO3-MgO Composites for Field Tunable Applications
DOI:10.1080/00150193.2010.520107  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Somiya, Y.;Bhalla, A. S.;Cross, L. E.;
7:1:42:18     Dielectric Tunability of (Sr0.8Pb0.2)TiO3-MgO Composites Under High Electric Fields
DOI:10.1080/10584587.2011.616454  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:1  AU: Somiya, Yoshitaka;Bhalla, Amar S.;Cross, L. Eric;
7:1:42:19     Phase Mixture and Reliability of BaTiO3-Based X7R Multilayer Ceramic Capacitors: X-Ray Diffractometry and Raman Spectroscopy
DOI:10.1111/j.1551-2916.2010.04248.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Lee, Hwan-Wen;Chu, Mike S. H.;Lu, Hong-Yang;
7:1:42:20     Structural and dielectric properties of NiO nanoparticles
DOI:10.1016/j.jnoncrysol.2012.12.007  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2013
  TC:2  AU: Gokul, B.;Matheswaran, P.;Abhirami, K. M.;Sathyamoorthy, R.;
7:1:42:21     The strong influence of iron additions on the lead-lanthanum-titanate ceramics
DOI:10.1016/j.optmat.2013.04.032  JN:OPTICAL MATERIALS  PY:2013
  TC:0  AU: Omari, Lhaj el Hachemi;Sayouri, Salaheddine;
7:1:43:1     Large Magnetostriction from Morphotropic Phase Boundary in Ferromagnets
DOI:10.1103/PhysRevLett.104.197201  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:28  AU: Yang, Sen;Bao, Huixin;Zhou, Chao;Wang, Yu;Ren, Xiaobing;Matsushita, Yoshitaka;Katsuya, Yoshio;Tanaka, Masahiko;Kobayashi, Keisuke;Song, Xiaoping;Gao, Jianrong;
7:1:43:2     Ferroelectric solid solutions with morphotropic boundary: Rotational instability of polarization, metastable coexistence of phases and nanodomain adaptive states
DOI:10.1080/14786430903074789  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:32  AU: Khachaturyan, A. G.;
7:1:43:3     Local rhombohedral symmetry in Tb0.3Dy0.7Fe2 near the morphotropic phase boundary
DOI:10.1063/1.4901646  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ma, Tianyu;Liu, Xiaolian;Pan, Xingwen;Li, Xiang;Jiang, Yinzhu;Yan, Mi;Li, Huiying;Fang, Minxia;Ren, Xiaobing;
7:1:43:4     Induced additional anisotropy influences on magnetostriction of giant magnetostrictive materials
DOI:10.1063/1.4765740  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Zhang, Changsheng;Ma, Tianyu;Yan, Mi;
7:1:43:5     Shear-driven morphotropic phase boundary in epitaxial ferroelectric thin films
DOI:10.1103/PhysRevB.84.132104  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Liu, Y. Y.;Li, J. Y.;
7:1:43:6     Morphotropic Phase Boundaries in Ferromagnets: Tb1-xDyxFe2 Alloys
DOI:10.1103/PhysRevLett.111.017203  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Bergstrom, Richard, Jr.;Wuttig, Manfred;Cullen, James;Zavalij, Peter;Briber, Robert;Dennis, Cindi;Garlea, V. Ovidiu;Laver, Mark;
7:1:43:7     Effect of the induced anisotropy axis on altering domain alignment and magnetostriction of Terfenol-D
DOI:10.1063/1.4864112  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhang, Changsheng;Sun, Guangai;Yan, Mi;Ma, Tianyu;
7:1:43:8     Inverse effect of morphotropic phase boundary on the magnetostriction of ferromagnetic Tb1-xGdxCo2
DOI:10.1103/PhysRevB.89.100101  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Zhou, Chao;Ren, Shuai;Bao, Huixin;Yang, Sen;Yao, Yonggang;Ji, Yuanchao;Ren, Xiaobing;Matsushita, Yoshitaka;Katsuya, Yoshio;Tanaka, Masahiko;Kobayashi, Keisuke;
7:1:43:9     Anisotropic magnetostriction in a < 110 > oriented crystal Tb(0.36)Dy(0.64)(Fe(0.85)Co(0.15))(2) after coaxial field annealing
DOI:10.1063/1.3467785  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Zhang, Changsheng;Ma, Tianyu;Qi, Ruilei;Yan, Mi;
7:1:43:10     Power generation transducer from magnetostrictive materials
DOI:10.1063/1.3597222  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Zhang, Hui;
7:1:43:11     Effect of magnetic annealing on magnetostrictive performance of a < 1 1 0 > oriented crystal Tb0.3Dy0.7Fe1.95
DOI:10.1016/j.jmmm.2009.12.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:8  AU: Ma, Tianyu;Zhang, Changsheng;Zhang, Pei;Yan, Mi;
7:1:43:12     Effects of magnetocrystalline anisotropy constant K-2 on magnetization and magnetostriction of Terfenol-D
DOI:10.1063/1.3533910  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Yang, Yan V.;Huang, Yongxin Y.;Jin, Yongmei M.;
7:1:43:13     Magnetic force microscopy study of magnetically annealed Tb0.36Dy0.64(Fe0.85Co0.15)(2) polycrystals
DOI:10.1063/1.3357402  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Ma, Tianyu;Zhang, Changsheng;Zhang, Jingjing;Tao, Shan;Yan, Mi;
7:1:43:14     Morphogenesis of maze-like magnetic domains
DOI:10.1103/PhysRevB.82.184411  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Bathany, Cedric;Le Romancer, Maelane;Armstrong, Jason N.;Chopra, Harsh Deep;
7:1:43:15     Magnetization and magnetostriction of Terfenol-D near spin reorientation boundary
DOI:10.1063/1.4718435  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Wang, Ben L.;Jin, Yongmei M.;
7:1:43:16     Optimization on magnetic transitions and magnetostriction in TbxDyyNdz(Fe0.9Co0.1)(1.93) compounds
DOI:10.1063/1.4824690  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Hu, C. C.;Shi, Y. G.;Shi, D. N.;Zhou, X. G.;Fan, J. Y.;Lv, L. Y.;Tang, S. L.;
7:1:43:17     Altering magnetostrictive strain pathways via morphology of spontaneously aligned domains
DOI:10.1103/PhysRevB.84.140401  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Jin, Yongmei M.;Chopra, Harsh Deep;
7:1:43:18     Magnetostriction of a < 110 > oriented Tb0.3Dy0.7Fe1.95 polycrystals annealed under a noncoaxial magnetic field
DOI:10.1557/jmr.2010.48  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:1  AU: Ma, Tianyu;Zhang, Changsheng;Qi, Ruilei;Dou, Qingqing;Yan, Mi;
7:1:43:19     Anisotropy compensation and magnetostrictive properties in Tb-x Dy1-x(Fe0.9Mn0.1)(1.93) Laves compounds: Experimental and theoretical analysis
DOI:10.1063/1.4807583  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Hu, C. C.;Shi, Y. G.;Shi, D. N.;Tang, S. L.;Fan, J. Y.;Du, Y. W.;
7:1:43:20     Domain rotation simulation of anisotropic magnetostrictions in giant magnetostrictive materials
DOI:10.1063/1.3634115  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Zhang, Changsheng;Ma, Tianyu;Yan, Mi;
7:1:43:21     Magnetostriction "drop" in < 110 > oriented polycrystals Tb0.36Dy0.64(Fe0.85Co0.15)(2) after transverse field annealing
DOI:10.1063/1.3563078  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Zhang, Changsheng;Ma, Tianyu;Yan, Mi;
7:1:43:22     The effect of magnetic annealing on the magnetostriction for Sm-Dy-Fe rod alloys
DOI:10.1063/1.4794282  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Wang, Bowen;Wang, Zhihua;Weng, Ling;Huang, Wenmei;Sun, Ying;Cui, Baozhi;
7:1:43:23     Stress-strain behaviors of < 110 >-oriented Tb0.3Dy0.7Fe1.95 after magnetic annealing
DOI:10.1557/JMR.2010.0174  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:0  AU: Zhang, Changsheng;Ma, Tianyu;Yan, Mi;
7:1:44:1     Fabrication and dielectric property of ferroelectric PLZT films grown on metal foils
DOI:10.1016/j.materresbull.2011.02.047  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:19  AU: Ma, Beihai;Tong, Sheng;Narayanan, Manoj;Liu, Shanshan;Chao, Sheng;Balachandran, U.;
7:1:44:2     Relaxor behavior and energy storage performance of ferroelectric PLZT thin films with different Zr/Ti ratios
DOI:10.1016/j.ceramint.2013.05.139  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:12  AU: Hu, Zhongqiang;Ma, Beihai;Liu, Shanshan;Narayanan, Manoj;Balachandran, Uthamalingam;
7:1:44:3     Dielectric spectroscopy of Pb0.92La0.08Zr0.52Ti0.48O3 films on hastelloy substrates with and without LaNiO3 buffer layers
DOI:10.1063/1.3291127  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Narayanan, Manoj;Ma, Beihai;Balachandran, U. (Balu);Li, Wei;
7:1:44:4     Temperature dependent polarization switching properties of ferroelectric Pb0.92La0.08Zr0.52Ti0.48O delta films grown on nickel foils
DOI:10.1063/1.4793304  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Ma, Beihai;Hu, Zhongqiang;Liu, Shanshan;Narayanan, Manoj;Balachandran, U. (Balu);
7:1:44:5     Enhanced dielectric properties of Pb0.92La0.08 Zr0.52Ti0.48O3 films with compressive stress
DOI:10.1063/1.4768926  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Ma, Beihai;Liu, Shanshan;Tong, Sheng;Narayanan, Manoj;Balachandran, U. (Balu);
7:1:44:6     Dense PLZT films grown on nickel substrates by PVP-modified sol-gel method
DOI:10.1007/s10853-012-6857-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:4  AU: Ma, Beihai;Chao, Sheng;Narayanan, Manoj;Liu, Shanshan;Tong, Sheng;Koritala, Rachel E.;Balachandran, Uthamalingam;
7:1:44:7     Effect of dead layer and strain on the diffuse phase transition of PLZT relaxor thin films
DOI:10.1016/j.actamat.2010.10.063  JN:ACTA MATERIALIA  PY:2011
  TC:7  AU: Tong, S.;Narayanan, M.;Ma, B.;Koritala, R. E.;Liu, S.;Balachandran, U. (Balu);Shi, D.;
7:1:44:8     Dielectric behavior of lead lanthanum zirconate titanate thin films deposited on different electrodes/substrates
DOI:10.1016/j.matlet.2013.05.068  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Tong, Sheng;Ma, Beihai;Narayanan, Manoj;Liu, Shanshan;Balachandran, Uthamalingam;Shi, Donglu;
7:1:44:9     Enhanced dielectric nonlinearity in epitaxial Pb0.92La0.08Zr0.52Ti0.48O3 thin films
DOI:10.1063/1.4872375  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Ma, Chunrui;Ma, Beihai;Mi, Shao-Bo;Liu, Ming;Wu, Judy;
7:1:44:10     Estimation of intrinsic contribution to dielectric response of Pb0.92La0.08Zr0.52Ti0.48O3 thin films at low frequencies using high bias fields
DOI:10.1063/1.4792529  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Narayanan, Manoj;Tong, Sheng;Liu, Shanshan;Ma, Beihai;Balachandran, Uthamalingam;
7:1:44:11     Development of PLZT dielectrics on base metal foils for embedded capacitors
DOI:10.1016/j.jeurceramsoc.2009.05.006  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Balachandran, U.;Kwon, D. K.;Narayanan, M.;Ma, B.;
7:1:44:12     Effects of pyrolysis conditions on dielectric properties of PLZT films derived from a polyvinylpyrrolidone-modified sol-gel process
DOI:10.1016/j.materresbull.2011.09.012  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:7  AU: Chao, Sheng;Ma, Beihai;Liu, Shanshan;Narayanan, Manoj;Balachandran, Uthamalingam;
7:1:44:13     Improved dielectric properties of lead lanthanum zirconate titanate thin films on copper substrates
DOI:10.1016/j.matlet.2009.09.059  JN:MATERIALS LETTERS  PY:2010
  TC:12  AU: Narayanan, M.;Ma, B.;Balachandran, U.;
7:1:44:14     Microstructure and electrical properties of LaNiO3 thin films by RF sputtering for the growth of (Pb,La)( Zr,Ti)O-3 films on silicon and nickel substrates
DOI:10.1116/1.4752084  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2012
  TC:0  AU: Liu, Shanshan;Ma, Beihai;Narayanan, Manoj;Tong, Sheng;Koritala, Rachel;Balachandran, Uthamalingam;
7:1:44:15     Ceramic dielectric film capacitors fabricated on aluminum foils by chemical solution deposition
DOI:10.1016/j.materresbull.2013.11.030  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Hu, Zhongqiang;Ma, Beihai;Liu, Shanshan;Narayanan, Manoj;Balachandran, Uthamalingam;
7:1:44:16     Effect of lanthanum content and substrate strain on structural and electrical properties of lead lanthanum zirconate titanate thin films
DOI:10.1016/j.matchemphys.2013.03.067  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:1  AU: Tong, Sheng;Narayanan, Manoj;Ma, Beihai;Liu, Shanshan;Koritala, Rachel E.;Balachandran, Uthamalingam;Shi, Donglu;
7:1:44:17     Dielectric properties of lead lanthanum zirconate titanate thin films with and without ZrO2 insertion layers
DOI:10.1063/1.4804170  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Liu, Shanshan;Ma, Beihai;Narayanan, Manoj;Tong, Sheng;Koritala, Rachel E.;Hu, Zhongqiang;Balachandran, Uthamalingam;
7:1:44:18     Phase evolution in solution deposited Pb-deficient PLZT thin films
DOI:10.1007/s10853-010-5051-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:5  AU: Nittala, Krishna;Brennecka, Geoff L.;Tuttle, Bruce A.;Jones, Jacob L.;
7:1:44:19     Novel ferroelectric capacitor for non-volatile memory storage and biomedical tactile sensor applications
DOI:10.1016/j.tsf.2010.03.108  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Liu, Shi Yang;Chua, Lynn;Tan, Kian Chuan;Valavan, S. E.;
7:1:44:20     Fabrication and characterization of ferroelectric PLZT film capacitors on metallic substrates
DOI:10.1007/s10853-009-3910-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:5  AU: Ma, Beihai;Narayanan, Manoj;Tong, Sheng;Balachandran, U.;
7:1:44:21     Ferroelectric and Piezoelectric properties of (111) oriented lanthanum modified lead zirconate titanate film
DOI:10.1016/j.tsf.2014.04.072  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Dutta, Soma;Jeyaseelan, A. Antony;Sruthi, S.;
7:1:44:22     Sol-Gel Synthesis of High-Quality SrRuO3 Thin-Film Electrodes Suppressing the Formation of Detrimental RuO2 and the Dielectric Properties of Integrated Lead Lanthanum Zirconate Titanate Films
DOI:10.1021/cm102136f  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:1  AU: Narayanan, Manoj;Tong, Sheng;Koritala, Rachel;Ma, Beihai;Pol, Vilas G.;Balachandran, U.;
7:1:45:1     Electric Fatigue of Lead- Free Piezoelectric Materials
DOI:10.1111/jace.12811  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:9  AU: Glaum, Julia;Hoffman, Mark;
7:1:45:2     The Nature of Polarization Fatigue in BiFeO3
DOI:10.1002/adma.201003612  JN:ADVANCED MATERIALS  PY:2011
  TC:42  AU: Baek, Seung-Hyub;Folkman, Chad M.;Park, Jae-Wan;Lee, Sanghan;Bark, Chung-Wung;Tybell, Thomas;Eom, Chang-Beom;
7:1:45:3     Polarization fatigue of Pr and Mn co-substituted BiFeO3 thin films
DOI:10.1063/1.3609246  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:20  AU: Wen, Zheng;Lv, Yong;Wu, Di;Li, Aidong;
7:1:45:4     Origin of the enhanced polarization in La and Mg co-substituted BiFeO3 thin film during the fatigue process
DOI:10.1063/1.3678636  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:15  AU: Ke, Qingqing;Kumar, Amit;Lou, Xiaojie;Zeng, Kaiyang;Wang, John;
7:1:45:5     Fatigue and ferroelectric behavior of La and Zn comodified BiFeO3 thin films
DOI:10.1063/1.3452348  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:19  AU: Wu, Jiagang;Wang, John;
7:1:45:6     Negative capacitance induced by redistribution of oxygen vacancies in the fatigued BiFeO3-based thin film
DOI:10.1063/1.4733982  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Ke, Qingqing;Lou, Xiaojie;Yang, Haibo;Kumar, Amit;Zeng, Kaiyang;Wang, John;
7:1:45:7     Enhanced fatigue and ferroelectric properties in multiferroic (Ba0.7Sr0.3)TiO3/(Bi1.05La0.05)FeO3 epitaxial heterostructures
DOI:10.1063/1.4809932  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Miao, Jun;Chew, K. -H.;Zhang, J. X.;Zhan, Q.;Xu, X. G.;Jiang, Y.;
7:1:45:8     Effects of oxygen vacancies on dielectric, electrical, and ferroelectric properties of Ba4Nd2Fe2Nb8O30 ceramics
DOI:10.1063/1.4867069  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Liu, Shu Fei;Wu, Yong Jun;Li, Juan;Chen, Xiang Ming;
7:1:45:9     Effect of microstructure on dielectric and fatigue strengths of BaTiO3
DOI:10.1016/j.jeurceramsoc.2010.04.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Lu, Shih-Chun;Chen, Yin-Hua;Tuan, Wei-Hsing;Shieh, Jay;Chen, Chin-Yi;
7:1:45:10     Epitaxial growth of multiferroic BiFeO3 thin films with (101) and (111) orientations on (100) Si substrates
DOI:10.1063/1.4811484  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Lee, Sung Kyun;Choi, Bum Ho;Hesse, Dietrich;
7:1:45:11     Effect of microstructure on lifetime performance of barium titanate ceramics under DC electric field loading
DOI:10.1016/j.jeurceramsoc.2010.05.015  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Chen, Yin-Hua;Tuan, Wei-Hsing;Shieh, Jay;
7:1:45:12     Effect of donor and acceptor dopants on fatigue properties in PZT thin films
DOI:10.1016/j.ceramint.2012.10.126  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Sreesattabud, Tharathip;Gibbons, Brady J.;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:1:45:13     The Intrinsic Nature of Fatigue Heterogeneity Behavior Observed in Bulk Lead Zirconate Titanate Ceramics
DOI:10.1080/00150193.2010.489804  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Zhang, Y.;Baturin, I. S.;
7:1:46:1     Relationship between structure and properties in high-temperature Bi(Al0.5Fe0.5)O-3-PbTiO3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2011.02.106  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Yao, Zhonghua;Peng, Liyuan;Liu, Hanxing;Hao, Hua;Cao, Minghe;Yu, Zhiyong;
7:1:46:2     A high-temperature double-mode piezoelectric ultrasonic linear motor
DOI:10.1063/1.4747150  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Li, Xiaotian;Chen, Jianguo;Chen, Zhijiang;Dong, Shuxiang;
7:1:46:3     Morphotropic phase boundary and high temperature dielectric, piezoelectric, and ferroelectric properties of (1-x)Bi(Sc3/4In1/4)O-3-xPbTiO(3) ceramics
DOI:10.1063/1.3638123  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Hu, Zhongqiang;Chen, Jianguo;Li, Meiya;Li, Xiaotian;Liu, Guoxi;Dong, Shuxiang;
7:1:46:4     Relaxor and ferro/piezoelectric behavior in BiScO3-(Na0.5Bi0.5)TiO3-PbTiO3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2012.03.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Yao, Zhonghua;Song, Zhe;Liu, Hanxing;Hao, Hua;Cao, Minghe;Yu, Zhiyong;
7:1:46:5     Temperature dependence of dielectric, piezoelectric and elastic properties of BiScO3-PbTiO3 high temperature ceramics with morphotropic phase boundary (MPB) composition
DOI:10.1016/j.jallcom.2012.05.041  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:18  AU: Chen, Jianguo;Shi, Huaduo;Liu, Guoxi;Cheng, Jinrong;Dong, Shuxiang;
7:1:46:6     Reduced Dielectric Loss and Strain Hysteresis in Fe and Mn Comodified High-Temperature BiScO3-PbTiO3 Ceramics
DOI:10.1111/jace.13224  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Chen, Jianguo;Jin, Guoxi;Wang, Chun-Ming;Cheng, Jinrong;
7:1:46:7     Comparison of the Temperature-Dependent Ferroelastic Behavior of Hard and Soft Lead Zirconate Titanate Ceramics
DOI:10.1111/j.1551-2916.2010.03801.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:15  AU: Marsilius, Mie;Webber, Kyle G.;Aulbach, Emil;Granzow, Torsten;
7:1:46:8     Structure, electrical properties, and depoling mechanism of BiScO3-PbTiO3-Pb(Zn1/3Nb2/3) O-3 high-temperature piezoelectric ceramics
DOI:10.1063/1.3525995  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Yao, Zhonghua;Liu, Hanxing;Hao, Hua;Cao, Minghe;
7:1:46:9     Ferroelectric, piezoelectric, and dielectric properties of BiScO3-PbTiO3-Pb(Cd1/3Nb2/3)O-3 ternary high temperature piezoelectric ceramics
DOI:10.1063/1.4812223  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Zhao, Tian-Long;Chen, Jianguo;Wang, Chun-Ming;Yu, Yang;Dong, Shuxiang;
7:1:46:10     A piezoelectric pseudo-bimorph actuator
DOI:10.1063/1.4811259  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Shi, Huaduo;Chen, Jianguo;Liu, Guoxi;Xiao, Wenlei;Dong, Shuxiang;
7:1:46:11     Enhanced piezoelectric performance of (0.98-x)Bi(Sc3/4In1/4)O(3-)xPbTiO(3)-0.02Pb(Zn1/3Nb2/3)O-3 ternary high temperature piezoelectric ceramics
DOI:10.1063/1.4799735  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Chen, Jianguo;Zhao, Tianlong;Cheng, Jinrong;Dong, Shuxiang;
7:1:46:12     A high-temperature piezoelectric linear actuator operating in two orthogonal first bending modes
DOI:10.1063/1.4790278  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Chen, Jianguo;Chen, Zhijiang;Li, Xiaotian;Dong, Shuxiang;
7:1:46:13     A shear-bending mode high temperature piezoelectric actuator
DOI:10.1063/1.4730326  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Chen, Jianguo;Li, Xiaotian;Liu, Guoxi;Chen, Zhijiang;Dong, Shuxiang;
7:1:46:14     Investigation of (1-x)(Bi0.94La0.06)(Ga0.05Fe0.95)O-3-xPbTiO(3) ceramics for high temperature applications
DOI:10.1016/j.ceramint.2014.05.042  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Dai, Rui;Chen, Jianguo;Cheng, Jinrong;
7:1:46:15     Effects of Nb doping on the microstructures and electrical properties of 0.44Bi(Sc0.75Co0.25)O-3-0.56PbTiO(3) piezoelectric system
DOI:10.1016/j.jallcom.2010.06.047  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Yao, Zhonghua;Liu, Hanxing;Cao, Minghe;Hao, Hua;
7:1:46:16     Thermal Degradation and Aging of High-Temperature Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2010.03663.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Gotmare, Sunil W.;Leontsev, Serhiy O.;Eitel, Richard E.;
7:1:46:17     A standing wave linear ultrasonic motor operating in face-diagonal-bending mode
DOI:10.1063/1.4820778  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Ci, Penghong;Liu, Guoxi;Chen, Zhijiang;Dong, Shuxiang;
7:1:46:18     High temperature piezoelectric ceramics based on (1-x)[BiScO3+Bi(Ni1/2Ti1/2)O-3]-xPbTiO(3)
DOI:10.1016/j.matlet.2012.04.067  JN:MATERIALS LETTERS  PY:2012
  TC:8  AU: Ansell, Troy Y.;Cann, David P.;
7:1:46:19     Dielectric and Piezoelectric Properties of (1-x)Bi(Sc-0.9(Zn1/2Ti1/2)(0.1))O-3-xPbTiO(3) Ceramics
DOI:10.1080/00150193.2010.485539  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Zhang, Qiang;Li, Zhenrong;Xu, Zhuo;Yao, Xi;
7:1:47:1     Difference between resistance degradation of fixed valence acceptor (Mg) and variable valence acceptor (Mn)-doped BaTiO3 ceramics
DOI:10.1063/1.3480992  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:22  AU: Yoon, Seok-Hyun;Randall, Clive A.;Hur, Kang-Heon;
7:1:47:2     Correlation Between Resistance Degradation and Thermally Stimulated Depolarization Current in Acceptor (Mg)-Doped BaTiO3 Submicrometer Fine-Grain Ceramics
DOI:10.1111/j.1551-2916.2010.03647.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:21  AU: Yoon, Seok-Hyun;Randall, Clive A.;Hur, Kang-Heon;
7:1:47:3     Effect of Ferroelectric Polarization on Ionic Transport and Resistance Degradation in BaTiO3 by Phase-Field Approach
DOI:10.1111/jace.13162  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Cao, Ye;Shen, Jie;Randall, Clive;Chen, Long-Qing;
7:1:47:4     Effect of acceptor concentration on the bulk electrical conduction in acceptor (Mg)-doped BaTiO3
DOI:10.1063/1.3428457  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Yoon, Seok-Hyun;Randall, Clive A.;Hur, Kang-Heon;
7:1:47:5     High-Energy Density Dielectrics and Capacitors for Elevated Temperatures: Ca(Zr,Ti)O-3
DOI:10.1111/jace.12184  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Lee, Haijoon;Kim, Jeong Ryeol;Lanagan, Michael J.;Trolier-McKinstry, Susan;Randall, Clive A.;
7:1:47:6     Microwave Dielectric Properties and Thermally Stimulated Depolarization Currents of MgF2-Doped Diopside Ceramics
DOI:10.1111/jace.13155  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Zhang, Jie;Zhou, Yuanyuan;Peng, Bin;Xie, Zhenkun;Zhang, Xiaohua;Yue, Zhenxing;
7:1:47:7     Microwave Dielectric Properties and Thermally Stimulated Depolarization Currents Study of (1-x)Ba0.6Sr0.4La4Ti4O15-xTiO(2) Ceramics
DOI:10.1111/jace.13123  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Zhang, Xiaohua;Zhang, Yao;Zhang, Jie;Peng, Bin;Xie, Zhenkun;Yuan, Lixin;Yue, Zhenxing;Li, Longtu;
7:1:47:8     Dielectric relaxation behavior of acceptor (Mg)-doped BaTiO3
DOI:10.1063/1.3582146  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Yoon, Seok-Hyun;Kwon, Sang-Hoon;Hur, Kang-Heon;
7:1:47:9     Impedance spectroscopy studies of bulk electrical conduction in A-site acceptor (K)-doped BaTiO3
DOI:10.1007/s10853-013-7513-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:0  AU: Ren, Pengrong;Fan, Huiqing;Wang, Xin;
7:1:47:10     Role of polaron hopping in leakage current behavior of a SrTiO3 single crystal
DOI:10.1063/1.4842836  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Cao, Y.;Bhattacharya, S.;Shen, J.;Randall, C. A.;Chen, L. Q.;
7:1:47:11     Improved reliability predictions in high permittivity dielectric oxide capacitors under high dc electric fields with oxygen vacancy induced electromigration
DOI:10.1063/1.4772599  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Randall, C. A.;Maier, R.;Qu, W.;Kobayashi, K.;Morita, K.;Mizuno, Y.;Inoue, N.;Oguni, T.;
7:1:47:12     Polarization Response and Thermally Stimulated Depolarization Current of BaTiO3-based Y5V Ceramic Multilayer Capacitors
DOI:10.1111/jace.13078  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Zhang, Xiaohua;Yue, Zhenxing;Peng, Bin;Xie, Zhenkun;Yuan, Lixin;Zhang, Jie;Li, Longtu;
7:1:47:13     Resistance degradation behavior of Zr-doped BaTiO3 ceramics and multilayer ceramic capacitor
DOI:10.1557/jmr.2013.57  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:2  AU: Yoon, Seok-Hyun;Kim, Jeong-Ryeol;Yoon, Sun-Ho;Kim, Chang-Hoon;Kim, Doo-Young;
7:1:47:14     Electric field concentration in the vicinity of the interface between anode and degraded BaTiO3-based ceramics in multilayer ceramic capacitor
DOI:10.1063/1.3555466  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Okamoto, Takafumi;Kitagawa, Shuji;Inoue, Noriyuki;Ando, Akira;
7:1:47:15     Thermally stimulated depolarization current analysis for the dielectric aging of Mn and V-codoped BaTiO3 multi layer ceramic capacitor
DOI:10.1063/1.4816380  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Yoon, Seok-Hyun;Park, Jae-Sung;Kim, Sang-Hyuk;Kim, Doo-Young;
7:1:47:16     Influence of Dy on the dielectric aging and thermally stimulated depolarization current in Dy and Mn-codoped BaTiO3 multilayer ceramic capacitor
DOI:10.1557/jmr.2013.347  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:1  AU: Yoon, Seok-Hyun;Lim, Jong-Bong;Kim, Sang-Hyuk;Kim, Doo-Young;
7:1:47:17     Resistance degradation behavior of Ca-doped BaTiO3
DOI:10.1557/JMR.2010.0278  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:2  AU: Yoon, Seok-Hyun;Kang, Sung-Hyung;Kwon, Sang-Hoon;Hur, Kang-Heon;
7:1:47:18     Effect of MnO2 on the electrical and dielectric properties of Y-doped Ba0.95Ca0.05Ti0.85Zr0.15O3 ceramics in reducing atmosphere
DOI:10.1016/j.ceramint.2014.05.100  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Shen, Zhengbo;Wang, Xiaohui;Gong, Huiling;Wu, Longwen;Li, Longtu;
7:1:47:19     Electrical conductivity of Ca1-xSrxTi0.65Fe0.35O3-delta, x=0, 0.5 and 1, polycrystalline compounds in the 300-500 K range
DOI:10.1016/j.materresbull.2012.01.029  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:0  AU: Muccillo, R.;Carmo, J. R.;
7:1:47:20     Control of Ferroelectric Aging by Manipulating Point Defects
DOI:10.1080/00150191003670382  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Bao, Huixin;Gao, Jinghui;Xue, Dezhen;Zhou, Chao;Zhang, Lixue;Liu, Wenfeng;Ren, Xiaobing;
7:1:47:21     Correlation between I (current)-V (voltage) characteristics and thermally stimulated depolarization current of Mn-doped BaTiO3 multilayer ceramic capacitor
DOI:10.1063/1.4818947  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Yoon, Seok-Hyun;Kim, Sang-Hyuk;Kim, Doo-Young;
7:1:48:1     Lattice, elastic, polarization, and electrostrictive properties of BaTiO3 from first-principles
DOI:10.1063/1.3462441  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:36  AU: Wang, J. J.;Meng, F. Y.;Ma, X. Q.;Xu, M. X.;Chen, L. Q.;
7:1:48:2     Temperature-pressure phase diagram and ferroelectric properties of BaTiO3 single crystal based on a modified Landau potential
DOI:10.1063/1.3504194  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:23  AU: Wang, J. J.;Wu, P. P.;Ma, X. Q.;Chen, L. Q.;
7:1:48:3     Barium titanate ground- and excited-state properties from first-principles calculations
DOI:10.1103/PhysRevB.83.054112  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Sanna, S.;Thierfelder, C.;Wippermann, S.;Sinha, T. P.;Schmidt, W. G.;
7:1:48:4     First-principles accurate total energy surfaces for polar structural distortions of BaTiO3, PbTiO3, and SrTiO3: Consequences for structural transition temperatures
DOI:10.1103/PhysRevB.82.134106  JN:PHYSICAL REVIEW B  PY:2010
  TC:19  AU: Nishimatsu, Takeshi;Iwamoto, Masaya;Kawazoe, Yoshiyuki;Waghmare, Umesh V.;
7:1:48:5     Piezoelectricity of SrTiO3: An ab initio description
DOI:10.1103/PhysRevB.88.035102  JN:PHYSICAL REVIEW B  PY:2013
  TC:11  AU: Erba, A.;El-Kelany, Kh. E.;Ferrero, M.;Baraille, I.;Rerat, M.;
7:1:48:6     Strain effect on phase transitions of BaTiO3 nanowires
DOI:10.1016/j.actamat.2011.08.015  JN:ACTA MATERIALIA  PY:2011
  TC:9  AU: Wang, J. J.;Eliseev, E. A.;Ma, X. Q.;Wu, P. P.;Morozovska, A. N.;Chen, Long-Qing;
7:1:48:7     Phase transitions and domain structures of ferroelectric nanoparticles: Phase field model incorporating strong elastic and dielectric inhomogeneity
DOI:10.1016/j.actamat.2013.08.055  JN:ACTA MATERIALIA  PY:2013
  TC:13  AU: Wang, J. J.;Ma, X. Q.;Li, Q.;Britson, J.;Chen, Long-Qing;
7:1:48:8     Surface structure and polarization of cubic and tetragonal BaTiO3: An ab initio study
DOI:10.1016/j.commatsci.2014.02.015  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: Iles, N.;Khodja, K. Driss;Kellou, A.;Aubert, P.;
7:1:48:9     BaTiO3: Energy, geometrical and electronic structure, relationship between optical constant and density from first-principles calculations
DOI:10.1016/j.optmat.2013.07.034  JN:OPTICAL MATERIALS  PY:2013
  TC:1  AU: Liu, Qi-Jun;Zhang, Ning-Chao;Liu, Fu-Sheng;Wang, Hong-Yan;Liu, Zheng-Tang;
7:1:48:10     Low-temperature phase of BaTiO3: Piezoelectric, dielectric, elastic, and photoelastic properties from ab initio simulations
DOI:10.1103/PhysRevB.89.045103  JN:PHYSICAL REVIEW B  PY:2014
  TC:4  AU: Mahmoud, A.;Erba, A.;El-Kelany, Kh. E.;Rerat, M.;Orlando, R.;
7:1:48:11     Domain formation and dielectric response in PbTiO3: A first-principles free-energy landscape analysis
DOI:10.1103/PhysRevB.87.024107  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Kumar, Anil;Rabe, Karin M.;Waghmare, Umesh V.;
7:1:48:12     Elastic and lattice dynamical properties of ternary strontium chalcogenide alloys
DOI:10.1016/j.mssp.2014.05.009  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:0  AU: Souadkia, M.;Bennecer, B.;Kalarasse, F.;
7:1:48:13     Structural, electronic, elastic and vibrational properties of BiAlO3: A first principles study
DOI:10.1016/j.jallcom.2013.05.158  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Koroglu, Ulas;Cabuk, Suleyman;Deligoz, Engin;
7:1:48:14     Improved Calculation of the Electronic and Optical Properties of Tetragonal Barium Titanate
DOI:10.1007/s11664-014-3096-3  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:1  AU: Siraji, Ashfaqul Anwar;Alam, M. Shah;
7:1:48:15     Photoelasticity of crystals from theoretical simulations
DOI:10.1103/PhysRevB.88.045121  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Erba, A.;Dovesi, R.;
7:1:48:16     BaTiO3(001)-(2 x 1): Surface Structure and Spin Density
DOI:10.1103/PhysRevLett.108.215502  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:2  AU: Meyerheim, H. L.;Ernst, A.;Mohseni, K.;Maznichenko, I. V.;Ostanin, S.;Klimenta, F.;Jedrecy, N.;Feng, W.;Mertig, I.;Felici, R.;Kirschner, J.;
7:1:48:17     First principles study of the interface between silicone and undoped/doped BaTiO3
DOI:10.1063/1.4791755  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Pilania, G.;Slenes, K.;Ramprasad, R.;
7:1:48:18     Ab initio calculation of vibrational and thermodynamic properties of SrX (S, Se, Te) in the B1 (NaCl) and B2 (CsCl) structures
DOI:10.1016/j.commatsci.2010.12.031  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2011
  TC:7  AU: Souadkia, M.;Bennecer, B.;Kalarasse, F.;Mellouki, A.;
7:1:49:1     Compositional range and electrical properties of the morphotropic phase boundary in the Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3 system
DOI:10.1016/j.jeurceramsoc.2009.10.006  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:55  AU: Otonicar, M.;Skapin, S. D.;Spreitzer, M.;Suvorov, D.;
7:1:49:2     Structural, Raman and electrical studies of 2 at.% Dy-doped NBT
DOI:10.1016/j.jallcom.2012.12.002  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Zannen, M.;Khemakhem, H.;Kabadou, A.;Es-Souni, M.;
7:1:49:3     Ferroelectric (Na1/2Bi1/2)TiO3 thin films showing photoluminescence properties
DOI:10.1007/s00339-014-8581-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Zannen, M.;Dietze, M.;Khemakhem, H.;Es-Souni, M.;
7:1:49:4     The erbium's amphoteric behavior effects on sodium bismuth titanate properties
DOI:10.1016/j.ceramint.2014.05.069  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Zannen, M.;Dietze, M.;Khemakhem, H.;Kabadou, A.;Es-Souni, M.;
7:1:49:5     Phase transition and electrical properties of lanthanum-modified sodium bismuth titanate
DOI:10.1016/j.matchemphys.2011.12.050  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:13  AU: Barick, B. K.;Choudhary, R. N. P.;Pradhan, Dillip K.;
7:1:49:6     Synthesis and Characterization of Na2Ti6O13 Whiskers and their Transformation to (1-x) Na0.5Bi0.5TiO3-xBaTiO(3) Ceramics
DOI:10.1111/j.1551-2916.2011.04444.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Maurya, Deepam;Murayama, M.;Priya, Shashank;
7:1:49:7     The formation of secondary phases in Bi0.5Na0.375K0.125TiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2012.02.031  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Naderer, Michael;Schuetz, Denis;Kainz, Theresa;Reichmann, Klaus;Mittermayr, Florian;
7:1:49:8     Physical properties of new, lead free (Na0.5Bi0.5)((1-x))BaxTi(1-x)(Fe0.5Nb0.5)(x)O-3 ceramics
DOI:10.1016/j.ceramint.2014.01.019  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Amouri, A.;Rouquette, J.;Hehlen, B.;Sauvajol, J. L.;Khemakhem, H.;
7:1:49:9     Piezoelectric properties and microstructures of ZnO-doped Bi0.5Na0.5TiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2011.05.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Lee, Ying-Chieh;Lee, Tai-Kuang;Jan, Jhen-Hau;
7:1:49:10     Solid state synthesis and sintering of solid solutions of BNT-xBKT
DOI:10.1016/j.jeurceramsoc.2014.04.040  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Kainz, T.;Naderer, M.;Schuetz, D.;Fruhwirth, O.;Mautner, F. A.;Reichmann, K.;
7:1:49:11     Structural, optical, and electrical properties of Nd-doped Na0.5Bi0.5TiO3
DOI:10.1016/j.matchemphys.2012.03.076  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:8  AU: Zannen, M.;Lahmar, A.;Dietze, M.;Khemakhem, H.;Kabadou, A.;Es-Souni, M.;
7:1:49:12     Uniaxial Stress Dependence of the Permittivity and the Hardening Effect in the Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3 System
DOI:10.1080/00150193.2014.923256  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Koenig, Jakob;Suvorov, Danilo;
7:1:49:13     Influence of the synthesis conditions on the dielectric properties in the Bi0.5Na0.5TiO3-KTaO3 system
DOI:10.1016/j.jeurceramsoc.2011.04.007  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Koenig, Jakob;Spreitzer, Matjaz;Suvorov, Danilo;
7:1:49:14     Optical gain in Er3+-doped transparent LuVO4 crystal at 850 nm
DOI:10.1016/j.optmat.2009.10.012  JN:OPTICAL MATERIALS  PY:2010
  TC:7  AU: Haro-Gonzalez, P.;Bettinelli, M.;Capuj, N. E.;Lahoz, F.;Martin, I. R.;Cavalli, E.;Gonzalez-Perez, S.;
7:1:49:15     Phase Formation of Sodium Bismuth Titanate Perovskite During Solid-State Processing
DOI:10.1111/j.1551-2916.2010.03977.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Aksel, Elena;Jones, Jacob L.;
7:1:49:16     The Chemical Interaction of Silver-Palladium Alloy Electrodes with Bismuth-Based Piezomaterials
DOI:10.1111/j.1551-2916.2009.03568.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Schuetz, Denis;Krauss, Werner;Albering, Joerg;Kurta, Christoph;Reichmann, Klaus;
7:1:49:17     Effect of SHI irradiation on NBT-BT ceramics: Transformation of relaxor ferroelectric to ferroelectric nature
DOI:10.1016/j.apsusc.2012.10.199  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: Sundari, S. Shanmuga;Kumar, Binay;Asokan, K.;Dhanasekaran, R.;
7:1:50:1     Investigating the physical meanings of diffused phase transition models
DOI:10.1016/j.jallcom.2010.11.003  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Hong, Cheng-Shong;Chu, Sheng-Yuan;Tsai, Cheng-Che;Su, Wen-Chang;
7:1:50:2     Structure, photoluminescence and electrical properties of BaBi3.Eu-5(0).5Ti4O15 ceramics
DOI:10.1016/j.ceramint.2014.05.099  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Diao, C. L.;Zheng, H. W.;Zhang, Y. G.;Chen, Z.;Fang, L.;
7:1:50:3     Dielectric and relaxor behavior of BaBi4Ti4O15 ceramics
DOI:10.1016/j.jallcom.2010.03.171  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:18  AU: Bobic, J. D.;Vijatovic, M. M.;Greicius, S.;Banys, J.;Stojanovic, B. D.;
7:1:50:4     Sintering characteristics and electrical properties of BaBi4Ti4O15 ferroelectric ceramics
DOI:10.1016/j.jallcom.2013.07.040  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:13  AU: Khokhar, Anita;Mahesh, M. L. V.;James, A. R.;Goyal, Parveen K.;Sreenivas, K.;
7:1:50:5     Structural and electrical properties of four-layers Aurivillius phase BaBi3.5Nd0.5Ti4O15 ceramics
DOI:10.1016/j.ceramint.2013.11.015  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Diao, C. L.;Zheng, H. W.;Gu, Y. Z.;Zhang, W. F.;Fang, L.;
7:1:50:6     Effect of La substitution on the structural and electrical properties of BaBi4-xLaxTi4O15
DOI:10.1016/j.ceramint.2013.03.075  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Bobic, J. D.;Petrovic, M. M. Vijatovic;Banys, J.;Stojanovic, B. D.;
7:1:50:7     Effect of La-substitution on the structure and dielectric properties of BaBi4Ti4O15 ceramics
DOI:10.1016/j.jallcom.2010.06.105  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:14  AU: Chakrabarti, A.;Bera, J.;
7:1:50:8     The microstructure and dielectric relaxor behavior of BaBi4-xLaxTi4O15 ferroelectric ceramics
DOI:10.1016/j.jallcom.2010.03.092  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:16  AU: Fang, Pinyang;Fan, Huiqing;Li, Jin;Chen, Lei;Liang, Fujun;
7:1:50:9     Electrical properties of niobium doped barium bismuth-titanate ceramics
DOI:10.1016/j.materresbull.2012.04.069  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:10  AU: Bobic, J. D.;Petrovic, M. M. Vijatovic;Banys, J.;Stojanovic, B. D.;
7:1:50:10     The indirect synthesized method induced relaxor state to ferroelectric characteristics for Pb0.95La0.05(Fe2/3W1/3)(0.65)Ti0.35O3 ceramics
DOI:10.1016/j.ceramint.2012.01.071  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Hong, Cheng-Shong;Chu, Sheng-Yuan;Tsai, Cheng-Che;Hsu, Chi-Cheng;
7:1:50:11     Effect of Ce and La substitution on dielectric properties of bismuth titanate ceramics
DOI:10.1016/j.ceramint.2010.09.005  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:15  AU: Pavlovic, Nikolina;Koval, Vladimir;Dusza, Jan;Srdic, Vladimir V.;
7:1:50:12     Radiofrequency and microwave properties study of the electroceramic BaBi4Ti4O15
DOI:10.1016/j.mseb.2013.11.017  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:2  AU: Silva, P. M. O.;Fernandes, T. S. M.;Oliveira, R. M. G.;Silva, M. A. S.;Sombra, A. S. B.;
7:1:50:13     Raman scattering, microstructural and dielectric studies on Ba1-xCaxBi4Ti4O15 ceramics
DOI:10.1016/j.matchemphys.2012.07.042  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:5  AU: Kumar, Sunil;Kundu, Swarup;Ochoa, D. A.;Garcia, J. E.;Varma, K. B. R.;
7:1:50:14     Dielectric and piezoelectric properties of cerium modified BaBi4Ti4O15 ceramics
DOI:10.1016/j.ceramint.2013.02.036  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Diao, C. L.;Xu, J. B.;Zheng, H. W.;Fang, L.;Gu, Y. Z.;Zhang, W. F.;
7:1:50:15     Sol-gel synthesis of long-lasting phosphors CdSiO3: Mn2+, RE3+ (RE = Tb, Eu, Nd) and luminescence mechanism
DOI:10.1016/j.materresbull.2011.08.012  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Qu, Xiaofei;Cao, Lixin;Liu, Wei;Su, Ge;Wang, Pingping;Schultz, Isabel;
7:1:50:16     Characterization and dielectric properties of Sr4M2Ti4Ta6O30 (M = Pr and Eu) ceramics
DOI:10.1016/j.jallcom.2010.03.212  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Li, Chunchun;Fang, Liang;Peng, Xiyang;Hu, Changzheng;Wu, Bolin;
7:1:50:17     Effect of synthesis method on the long-range order of the space charge type in 0.75PFW-0.25PT ceramics
DOI:10.1016/j.jallcom.2010.03.096  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:2  AU: Hong, Cheng-Shong;Chu, Sheng-Yuan;Su, Wen-Chang;
7:1:50:18     Effects of synthesized method on glassy behavior and freezing process of 0.75PFW-0.25PT ceramics
DOI:10.1063/1.3517792  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Hong, Cheng-Shong;Chu, Sheng-Yuan;Tsai, Cheng-Che;Su, Wen-Chang;Hsu, Chi-Cheng;
7:1:50:19     An alternative method for the measurement of the microwave temperature coefficient of resonant frequency (tau(f))
DOI:10.1063/1.4755799  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Silva, M. A. S.;Fernandes, T. S. M.;Sombra, A. S. B.;
7:1:50:20     Microstructure and electrical properties of Aurivillius phase (CaBi2Nb2O9)(1-x)(BaBi2Nb2O9)(x) solid solution
DOI:10.1063/1.3457229  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Zhang, Hongtao;Yan, Haixue;Reece, Michael J.;
7:1:50:21     Are the parameters of the empirical law dependent on the dielectric properties of the ferroelectric relaxors?
DOI:10.1016/j.ceramint.2009.12.001  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:1  AU: Hong, Cheng-Shong;Chu, Sheng-Yuan;Su, Wen-Chang;Nien, Hsiau-Hsian;
7:1:50:22     Lanthanum dopant induced transition from the ferroelectric to the relaxor state in 0.7PFW-0.3PT ceramics
DOI:10.1016/j.ceramint.2011.03.044  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:2  AU: Hong, Cheng-Shong;Chu, Sheng-Yuan;Tsai, Cheng-Che;Hsu, Chi-Cheng;
7:1:50:23     Investigation of Ferroelectric Layered Perovskite Barium Bismuth Tantalate Prepared by Solid-State Reaction
DOI:10.1080/00150193.2012.675265  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Simoes, A. Z.;Stojanovic, B. D.;Lazarevic, Z. Z.;Romcevic, N. Z.;Varela, J. A.;Longo, E.;
7:1:50:24     Dielectric, Ferroelectric and Piezoelectric Properties of Sr0.8Na0.1Nd0.1Bi4Ti4O15 Prepared by Sol Gel and Solid State Technique
DOI:10.1080/00150193.2014.932616  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Rizwana;Sarah, P.;
7:1:51:1     Effects of Kaolinite addition on the densification and dielectric properties of BaTiO3 ceramics
DOI:10.1016/j.jallcom.2011.06.003  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Pu, Yongping;Chen, Kai;Wu, Haidong;
7:1:51:2     Structural, dielectric and ferroelectric properties of Ba1-x(Bi0.5Na0.5)(x)TiO3 ceramics
DOI:10.1016/j.ceramint.2012.10.191  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:13  AU: Rawat, Meera;Yadav, K. L.;
7:1:51:3     Nb-Modified 0.9BaTiO(3)-0.1(Bi0.5Na0.5)TiO3 Ceramics for X9R High-Temperature Dielectrics Application Prepared by Coating Method
DOI:10.1111/j.1551-2916.2012.05316.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:15  AU: Yao, Guofeng;Wang, Xiaohui;Zhang, Yichi;Shen, Zhengbo;Li, Longtu;
7:1:51:4     Positive temperature coefficient of resistivity behavior of Niobium-doped (1-x)BaTiO3-xBi(0.5)Li(0.5)TiO(3) ceramics
DOI:10.1016/j.jallcom.2010.03.149  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:13  AU: Pu, Yongping;Wei, Jifeng;Mao, Yuqin;Wang, Jinfei;
7:1:51:5     Nb-Doped 0.9BaTiO(3)-0.1(Bi0.5Na0.5)TiO3 Ceramics with Stable Dielectric Properties at High Temperature
DOI:10.1111/j.1551-2916.2011.04793.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Yao, Guofeng;Wang, Xiaohui;Wu, Yunyi;Li, Longtu;
7:1:51:6     High dielectric constant of (Ba0.96Ca0.04)(Ti0.85Zr0.15)O-3 multilayer ceramic capacitors with Cu doped Ni electrodes
DOI:10.1016/j.jallcom.2011.04.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:11  AU: Lee, Ying-Chieh;Chiang, Chen-Su;
7:1:51:7     Kaolinite as a Suspending Agent for Preparation of Porous BaTiO3 Ceramics via Freeze Casting
DOI:10.1007/s11664-013-2827-1  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Li, Pin;Pu, Yongping;Dong, Zijing;Gao, Pan;
7:1:51:8     Fabrication and positive temperature coefficient of resistivity properties of semiconducting ceramics based on the BaTiO3-(Bi1/2K1/2)TiO3 system
DOI:10.1016/j.jeurceramsoc.2009.08.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:20  AU: Takeda, H.;Harinaka, H.;Shiosaki, T.;Zubair, M. A.;Leach, C.;Freer, R.;Hoshina, T.;Tsurumi, T.;
7:1:51:9     Decisive role of MgO addition in the ultra-broad temperature stability of multicomponent BaTiO3-based ceramics
DOI:10.1016/j.ceramint.2013.06.110  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Li, Lingxia;Wang, Mingjing;Liu, Yaran;Chen, Junxiao;Zhang, Ning;
7:1:51:10     Compositional effects on structural, dielectric, ferroelectric and transport properties of Ba1-x(Bi0.5Li0.5)(x)TiO3 ceramics
DOI:10.1016/j.matchemphys.2014.08.031  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Rawat, Meera;Yadav, K. L.;
7:1:51:11     Study on the microstructure and dielectric properties of X9R ceramics based on BaTiO3
DOI:10.1016/j.mseb.2010.09.004  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:9  AU: Gao, Shunqi;Wu, Shunhua;Zhang, Yonggang;Yang, Hongxing;Wang, Xinru;
7:1:51:12     Characteristics of BaO-B2O3-SiO2 nano glass powders prepared by flame spray pyrolysis as the sintering agent of BaTiO3 ceramics
DOI:10.1016/j.jallcom.2011.05.053  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Choi, Seung Ho;Ko, You Na;Kim, Jung Hyun;Hong, Young Jun;Kang, Yun Chan;
7:1:51:13     Enhancement of dielectric properties by addition of Li-Ti-Si-O nanocomposite to X7R ceramics
DOI:10.1016/j.jallcom.2012.09.114  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Li, Leilei;Liu, Yu;Cui, Bin;Niu, Ruiyuan;Zhang, Qing;Chang, Zhuguo;
7:1:51:14     Synthesis and electrical properties of lead free (Bi0.5K0.5)TiO3-BaTiO3-Bi(Zn0.5Ti0.5)O-3 ceramics
DOI:10.1016/j.ceramint.2011.07.063  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Prasatkhetragarn, A.;Yotburut, B.;Triamnak, N.;Yimnirun, R.;Cann, D. P.;
7:1:51:15     Dielectric properties and microstructures of non-reducible high-temperature stable X9R ceramics
DOI:10.1016/j.jeurceramsoc.2013.02.021  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Wang, Sea-Fue;Li, Jian-Hua;Hsu, Yung-Fu;Wu, Yu-Chuan;Lai, Yuan-Cheng;Chen, Ming-Hua;
7:1:51:16     Positive temperature coefficient of resistance effect in Na2Ti6O13-doped 0.94BaTiO(3)-0.06(Bi0.5Na0.5)TiO3 ceramics
DOI:10.1007/s00339-011-6700-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Jeong, Young Hun;Cha, Yu-Joung;Kim, Chang-Il;Lee, Young-Jin;Jeon, Myoung-Pyo;Cho, Jeong-Ho;Paik, Jong-Hoo;Kim, Dae-Jun;
7:1:51:17     Synthesis and characterization of Zn-B-Si-O nano-composites and their doped BaTiO3 ceramics
DOI:10.1016/j.materresbull.2010.06.009  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:4  AU: Niu, Ruiyuan;Cui, Bin;Du, Fengtao;Chang, Zhuguo;Tang, Zongxun;
7:1:51:18     Synthesis and electrical characteristics of (1-x)BaTiO3-xK(0.5)Bi(0.5)TiO(3) PTCR ceramics
DOI:10.1016/j.matchemphys.2012.06.047  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:0  AU: Plutenko, T. A.;V'yunov, O. I.;Belous, A. G.;
7:1:51:19     Dielectric properties of organofunctionalized kaolinite clay and application in adsorption mercury cation
DOI:10.1016/j.ceramint.2011.09.062  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Guerra, Denis L.;Oliveira, Silze P.;Silva, Ricardo A. S.;Silva, Emiliano M.;Batista, Adriano C.;
7:1:52:1     Temperature-dependent ferroelectric hysteresis properties of modified lead zirconate titanate ceramics
DOI:10.1007/s10853-012-6280-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:11  AU: Wen, Baohua;Zhang, Yong;Liu, Xiaolin;Ma, Liang;Wang, Xiangrong;
7:1:52:2     Ferroelectric properties and dynamic scaling of < 100 > oriented (K0.5Na0.5)NbO3 single crystals
DOI:10.1063/1.3600058  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:16  AU: Gupta, Shashaank;Priya, Shashank;
7:1:52:3     Linear temperature scaling of ferroelectric hysteresis in Mn-doped Pb(Mn1/3Sb2/3)O-3-Pb(Zr,Ti)O-3 ceramic with internal bias field
DOI:10.1063/1.4795442  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Du, Gang;Liang, Ruihong;Wang, Li;Li, Kui;Zhang, Wenbin;Wang, Genshui;Dong, Xianlin;
7:1:52:4     Polarization reversal and dynamic scaling of (Na0.5K0.5)NbO3 lead-free ferroelectric ceramics with double hysteresis-like loops
DOI:10.1063/1.4768270  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Fu, Jian;Zuo, Ruzhong;
7:1:52:5     ac dynamics of ferroelectric domains from an investigation of the frequency dependence of hysteresis loops
DOI:10.1103/PhysRevB.82.174125  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Yang, S. M.;Jo, J. Y.;Kim, T. H.;Yoon, J. -G.;Song, T. K.;Lee, H. N.;Marton, Z.;Park, S.;Jo, Y.;Noh, T. W.;
7:1:52:6     Field and Frequency Dependence of the Dynamic Hysteresis in Lead Zirconate Titanate Solid Solutions
DOI:10.1111/jace.12609  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Chen, Xuefeng;Dong, Xianlin;Cao, Fei;Wang, Junxia;Wang, Genshui;
7:1:52:7     Temperature dependences of dynamic hysteresis in Pb(Zr,Sn,Ti)O-3 ceramics extending over Curie temperature
DOI:10.1063/1.4901825  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chen, Xuefeng;Zhou, Zhiyong;Wang, Junxia;Nie, Hengchang;Cao, Fei;Dong, Xianlin;Wang, Genshui;
7:1:52:8     Dynamic hysteresis of tetragonal ferroelectrics: The resonance of 90 degrees-domain switching
DOI:10.1063/1.3683549  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Chen, D. P.;Liu, J-M;
7:1:52:9     Identical scaling behavior of saturated dynamic hysteresis in rhombohedral lead zirconate titanate bulk ceramics
DOI:10.1063/1.4858355  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Chen, Xuefeng;Dong, Xianlin;Zhou, Zhiyong;Wang, Junxia;Cao, Fei;Wang, Genshui;Zhang, Hongling;
7:1:52:10     Three-stage evolution of dynamic hysteresis scaling behavior in 63PbTiO(3)-37BiScO(3) bulk ceramics
DOI:10.1063/1.3427566  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Yu, Gang;Dong, Xianlin;Wang, Genshui;Cao, Fei;Chen, Xuefeng;Nie, Hengchang;
7:1:52:11     Dynamic hysteresis and scaling behavior for Pb(Zr,Ti)O-3 ceramics
DOI:10.1063/1.4869496  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chen, Xuefeng;Dong, Xianlin;Zhou, Zhiyong;Wang, Junxia;Cao, Fei;Wang, Genshui;Zhang, Hongling;
7:1:52:12     Effect of phase structure on the dynamic hysteresis scaling behavior in (1-x)BiScO3-xPbTiO(3) bulk ceramics
DOI:10.1016/j.jallcom.2010.03.194  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Yu, Gang;Dong, Xianlin;Wang, Genshui;Cao, Fei;Chen, Xuefeng;
7:1:52:13     Dielectric and ferroelectric response of compositionally graded bilayer and trilayer composites of BaTiO3 and 0.975BaTiO(3)-0.025Ba(Cu1/3Nb2/3)O-3
DOI:10.1063/1.3514125  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Maurya, Deepam;Wongdamnern, Natthapong;Yimnirun, Rattikorn;Priya, Shashank;
7:1:52:14     Frequency Dependence of Coercive Field in Soft Pb(Zr1-xTix)O3 (0.20=x=0.60) Bulk Ceramics
DOI:10.1111/j.1551-2916.2011.04913.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Chen, Xuefeng;Dong, Xianlin;Zhang, Hongling;Cao, Fei;Wang, Genshui;Gu, Yan;He, Hongliang;Liu, Yusheng;
7:1:52:15     Scaling behavior of dynamic hysteresis in relaxor ferroelectric 0.67Pb(Mg1/3Nb2/3)O-3-0.33PbTiO(3) ceramics
DOI:10.1063/1.4704383  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Zhang, Y. C.;Lu, C. J.;Yang, Z. Z.;Ye, W. N.;Xia, L. H.;
7:1:52:16     Hysteresis scaling relations in polycrystalline BaTiO3 bulk ceramics
DOI:10.1016/j.matchemphys.2010.06.032  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:4  AU: Wongdamnern, N.;Tangsritragul, J.;Ngamjarurojana, A.;Ananta, S.;Laosiritaworn, Y.;Yimnirun, R.;
7:1:52:17     Study of Aging & De-Aging Behaviour in Un-Doped Polycrystalline Ferroelectric BaTiO3
DOI:10.1080/00150193.2012.738590  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Upadhyay, Sanjay Kumar;Reddy, V. Raghavendra;Sharma, Kavita;Gome, Anil;Gupta, Ajay;
7:1:52:18     Study of Ferroelectric Hysteresis Scaling Exponents in Aged Polycrystalline BaTiO3
DOI:10.1080/00150193.2013.814467  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Upadhyay, Sanjay Kumar;Reddy, V. Raghavendra;
7:1:52:19     High Dielectric Composition in the System Sn-Modified (1-x)BaTiO3-xBa(Cu1/3Nb2/3)O-3, x=0.025 for Multilayer Ceramic Capacitors
DOI:10.1111/j.1551-2916.2009.03523.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Maurya, Deepam;Ahn, Cheol-Woo;Zhang, Shujun;Priya, Shashank;
7:1:53:1     Phase transition and conduction mechanism of rare earth based tungsten-bronze compounds
DOI:10.1016/j.jallcom.2012.06.077  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:33  AU: Parida, B. N.;Das, Piyush R.;Padhee, R.;Choudhary, R. N. P.;
7:1:53:2     Synthesis, microstructure, dielectric and magnetic properties of Cu substituted Ni-Li ferrites
DOI:10.1016/j.jmmm.2010.09.053  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:28  AU: Singh, Navneet;Agarwal, Ashish;Sanghi, Sujata;Singh, Paramjeet;
7:1:53:3     Electrical and Pyroelectric Properties of K2Pb2Gd2W2Ti4Nb4O30 Ferroelectrics
DOI:10.1007/s11664-012-2376-z  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:7  AU: Padhee, R.;Das, Piyush R.;Parida, B. N.;Choudhary, R. N. P.;
7:1:53:4     Effect of Praseodymium on Electrical Properties of BiFeO3 Multiferroic
DOI:10.1007/s11664-013-2847-x  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:3  AU: Pattanayak, Samita;Choudhary, R. N. P.;Das, Piyush R.;
7:1:53:5     Dielectric relaxation related to single-ionized oxygen vacancies in (Pb1-xLax)(Zr0.90Ti0.10)(1-x/4)O-3 ceramics
DOI:10.1016/j.materresbull.2010.04.026  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:10  AU: Pelaiz-Barranco, A.;Guerra, J. D. S.;
7:1:53:6     Dielectric and Impedance Spectroscopy of Barium Bismuth Vanadate Ferroelectrics
DOI:10.1007/s11664-014-3231-1  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:1  AU: Sutar, B. C.;Choudhary, R. N. P.;Das, Piyush R.;
7:1:53:7     Phase transition and electrical properties of PbMg1/3Nb2/3O3-BiFeO3 solid-solution
DOI:10.1016/j.matlet.2011.09.050  JN:MATERIALS LETTERS  PY:2012
  TC:6  AU: Sahoo, M. P. K.;Choudhary, R. N. P.;
7:1:53:8     Studies of dielectric, pyroelectric and conduction mechanism of Sr3Ta2O8
DOI:10.1016/j.ceramint.2013.07.138  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Pati, Biswajit;Choudhary, R. N. P.;Das, Piyush R.;
7:1:53:9     Dielectric and Pyroelectric Properties of La- and Pr-Modified Tungsten-Bronze Ferroelectrics
DOI:10.1007/s11664-013-2637-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:3  AU: Parida, B. N.;Das, Piyush R.;Padhee, R.;Choudhary, R. N. P.;
7:1:53:10     Phase transition and electrical properties of strontium orthovanadate
DOI:10.1016/j.jallcom.2013.06.050  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Pati, Biswajit;Choudhary, R. N. P.;Das, Piyush R.;
7:1:53:11     Pyroelectric and dielectric properties of lead-free ferroelectric Ba3Nb2O8 ceramic
DOI:10.1016/j.jallcom.2013.12.241  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Pati, Biswajit;Choudhary, R. N. P.;Das, Piyush R.;Parida, B. N.;Padhee, R.;
7:1:53:12     Dielectric and Impedance Spectroscopy of Barium Orthoniobate Ceramic
DOI:10.1007/s11664-013-2567-2  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:7  AU: Pati, Biswajit;Choudhary, R. N. P.;Das, Piyush R.;Parida, B. N.;Padhee, R.;
7:1:53:13     Dielectric and Impedance Spectroscopy of ZnWO4 Electroceramics
DOI:10.1007/s11664-014-3198-y  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Mekap, Anita;Das, Piyush R.;Choudhary, R. N. P.;
7:1:53:14     Ferroelectric and ferromagnetic properties of Gd-modified BiFeO3
DOI:10.1016/j.jmmm.2013.04.041  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:12  AU: Pattanayak, Samita;Choudhary, R. N. P.;Shannigrahi, S. R.;Das, Piyush R.;Padhee, R.;
7:1:53:15     Development of Electronic and Electrical Materials from Indian Ilmenite
DOI:10.1007/s11664-012-2465-z  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:2  AU: Choudhury, R. N. P.;Pati, Biswajit;Das, Piyush R.;Dash, R. R.;Paul, Ankita;
7:1:53:16     Shell model of BaTiO3 derived from ab-initio total energy calculations
DOI:10.1063/1.4827475  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Vielma, J. M.;Schneider, G.;
7:1:53:17     Phase transitions and piezoelectric properties of SrBi2Ta2O9 by molecular dynamics simulations
DOI:10.1007/s10853-010-4466-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:3  AU: Machado, R.;Sepliarsky, M.;Stachiotti, M. G.;
7:1:53:18     Structural, Dielectric, and Electrical Properties of BiFeWO6 Ceramic
DOI:10.1007/s11664-013-2923-2  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:2  AU: Rout, Jyoshna;Parida, B. N.;Das, Piyush R.;Choudhary, R. N. P.;
7:1:53:19     Electrical properties of ferroelectric-gate FETs with SrBi2Ta2O9 formed using MOCVD technique
DOI:10.1007/s00339-012-6978-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:4  AU: Yan, Kang;Takahashi, Mitsue;Sakai, Shigeki;
7:1:53:20     Development of bismuth-based electronic materials from Indian red mud
DOI:10.1016/j.ceramint.2014.04.070  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Choudhary, R. N. P.;Behera, C.;Das, Piyush R.;Das, R. R.;
7:1:54:1     A new potential model for barium titanate and its implications for rare-earth doping
DOI:10.1039/c0jm04058d  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:35  AU: Freeman, Colin L.;Dawson, James A.;Chen, Hung-Ru;Harding, John H.;Ben, Liu-Bin;Sinclair, Derek C.;
7:1:54:2     Local-structure origins of the sustained Curie temperature in (Ba,Ca)TiO3 ferroelectrics
DOI:10.1063/1.4802996  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:18  AU: Levin, Igor;Krayzman, Victor;Woicik, Joseph C.;
7:1:54:3     The application of a new potential model to the rare-earth doping of SrTiO3 and CaTiO3
DOI:10.1039/c2tc00475e  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:13  AU: Dawson, J. A.;Li, X.;Freeman, C. L.;Harding, J. H.;Sinclair, D. C.;
7:1:54:4     The Influence of A-Site Rare Earth Ion Size in Controlling the Curie Temperature of Ba1-xRExTi1-x/4O3
DOI:10.1002/adfm.201201705  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:11  AU: Freeman, Colin L.;Dawson, James A.;Harding, John H.;Ben, Liu-Bin;Sinclair, Derek C.;
7:1:54:5     A-Site Strain and Displacement in Ba1-xCaxTiO3 and Ba1-xSrxTiO3 and the Consequences for the Curie Temperature
DOI:10.1021/cm502158n  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:3  AU: Dawson, James A.;Sinclair, Derek C.;Harding, John H.;Freeman, Colin L.;
7:1:54:6     Ca K-edge X-ray absorption fine structure in BaTiO3-CaTiO3 solid solutions
DOI:10.1063/1.4784226  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Krayzman, V.;Levin, I.;Woicik, J. C.;Bridges, F.;Nelson, E. J.;Sinclair, D. C.;
7:1:54:7     Enhanced dielectric and ferroelectric characteristics in Ca-modified BaTiO3 ceramics
DOI:10.1063/1.4819482  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Zhu, Xiao Na;Zhang, Wei;Chen, Xiang Ming;
7:1:54:8     Synchrotron X-ray absorption spectroscopy study of local structure transformation behavior in perovskite Ba(Ti,Zr)O-3 system
DOI:10.1016/j.jallcom.2014.07.175  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Bootchanont, Atipong;Jutimoosik, Jaru;Chandarak, Sujittra;Unruan, Muangjai;Kidkhunthod, Pinit;Klysubun, Wantana;Rujirawat, Saroj;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar;
7:1:54:9     First-principles study of intrinsic point defects in hexagonal barium titanate
DOI:10.1063/1.4711099  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Dawson, J. A.;Harding, J. H.;Chen, H.;Sinclair, D. C.;
7:1:54:10     Investigation of local structure in BaTiO3-BaZrO3 system by synchrotron X-ray absorption spectroscopy
DOI:10.1016/j.ceramint.2012.10.139  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Bootchanont, Atipong;Jutimoosik, Jaru;Chandarak, Sujittra;Unruan, Muangjai;Rujirawat, Saroj;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar;
7:1:54:11     Local structure in perovskite (Ba,Sr)TiO3: Reverse Monte Carlo refinements from multiple measurement techniques
DOI:10.1103/PhysRevB.89.024106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Levin, Igor;Krayzman, Victor;Woicik, Joseph C.;
7:1:54:12     Atomistic structure of (Ba,Sr)TiO3: Comparing molecular-dynamics simulations with structural measurements
DOI:10.1063/1.4813273  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Noordhoek, M. J.;Krayzman, V.;Chernatynskiy, A.;Phillpot, S. R.;Levin, I.;
7:1:54:13     An ultra-broad working temperature dielectric material obtained with Praseodymium doped BaTiO3-(Bi0.5Na0.5)TiO3-Nb2O5 based ceramics
DOI:10.1016/j.ceramint.2014.03.091  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Li, Lingxia;Chen, Junxiao;Guo, Dong;Zhang, Ning;Wang, Mingjing;Liu, Yaran;
7:1:54:14     Ultra-Broad Temperature Stability Obtained with Ce-Doped BaTiO3-Based Ceramics
DOI:10.1111/jace.12577  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Wang, Mingjing;Li, Lingxia;Zhang, Ning;Liu, Yaran;Chen, Junxiao;
7:1:54:15     Local structure and evolution of relaxor behavior in BaTiO3-Bi(Zn0.5Ti0.5)O-3 ceramics
DOI:10.1016/j.ceramint.2014.06.067  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Bootchanont, Atipong;Triamnak, Narit;Rujirawat, Saroj;Yimnirun, Rattikorn;Cann, David P.;Guo, Ruyan;Bhalla, Amar;
7:1:54:16     An atomistic study into the defect chemistry of hexagonal barium titanate
DOI:10.1063/1.3560552  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Dawson, J. A.;Freeman, C. L.;Ben, L. -B.;Harding, J. H.;Sinclair, D. C.;
7:1:54:17     Energetics of Donor-Doping, Metal Vacancies, and Oxygen-Loss in A-Site Rare-Earth-Doped BaTiO3
DOI:10.1002/adfm.201203147  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:14  AU: Freeman, Colin L.;Dawson, James A.;Chen, Hung-Ru;Ben, Liubin;Harding, John H.;Morrison, Finlay D.;Sinclair, Derek C.;West, Anthony R.;
7:1:54:18     Dynamic microscopic structures and dielectric response in the cubic-to-tetragonal phase transition for BaTiO3 studied by first-principles molecular dynamics simulation
DOI:10.1063/1.3555587  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Xie, L.;Li, Y. L.;Yu, R.;Zhu, Jing;
7:1:54:19     Diffusion Behavior of Oxygen in the Hexagonal BaTiO3 Single Crystal Grown by FZ Method
DOI:10.1080/00150191003760852  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Natsui, Hidesada;Yu, Jianding;Hashimoto, Satoshi;Itoh, Mitsuru;Odawara, Osamu;Yoda, Shinichi;
7:1:54:20     Diffusion Behavior of Oxygen and Dielectric Properties in the Hexagonal BaTiO3
DOI:10.1080/00150193.2011.577382  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Natsui, Hidesada;Yu, Jianding;Hashimoto, Satoshi;Itoh, Mitsuru;Odawara, Osamu;Yoda, Shinichi;
7:1:55:1     Effect of LiSbO3 on the phase structure, microstructure and electric properties of Sr0.53Ba0.47Nb2O6 ceramics
DOI:10.1016/j.jallcom.2011.03.149  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Wei, Lingling;Yang, Zupei;Gu, Rui;Yan, Xuejuan;Li, Yongqiang;
7:1:55:2     Structure and electrical properties of Ca0.28Ba0.72Nb2O6 ceramics with addition of rare earth oxides (CeO2, La2O3)
DOI:10.1016/j.ceramint.2013.10.130  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Wei, Lingling;Yang, Zupei;Chao, Xiaolian;Jiao, Huan;
7:1:55:3     Phase formation, microstructure and dielectric properties of Sr0.53Ba0.47Nb2-xTaxO6 ceramics
DOI:10.1016/j.jallcom.2010.05.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Yang, Zupei;Gu, Rui;Wei, Lingling;Ren, Hongmei;
7:1:55:4     Structure and electrical properties of textured Sr1.85Ca0.15NaNb5O15 ceramics prepared by the reactive templated grain growth
DOI:10.1016/j.materresbull.2014.01.010  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Wei, Lingling;Chao, Xiaolian;Han, Xiaokun;Yang, Zupei;
7:1:55:5     Effect of BaTiO3 addition on the microstructure and relaxor ferroelectric properties of Sr0.7Ba0.3Nb2O6 ceramics
DOI:10.1016/j.ceramint.2012.05.059  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Li, Jinglei;Pu, Yongping;Wang, Zhuo;Dai, Jie;
7:1:55:6     Microstructure and relaxor ferroelectric properties of Bi2O3-doped strontium barium niobate ceramics
DOI:10.1016/j.mseb.2013.07.008  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Li, Jinglei;Pu, Yongping;Wang, Zhuo;Dong, Zijing;Dai, Jie;
7:1:55:7     Structures, dielectric and ferroelectric properties of Sr2-xCaxNaNb5O15 lead-free ceramics
DOI:10.1557/jmr.2012.32  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:5  AU: Wei, Lingling;Yang, Zupei;Han, Xiaokun;Li, Zhaohu;
7:1:55:8     Relaxor behavior in (Ba1-3x/2Bix)(ZryTi1-y)O-3 ceramics
DOI:10.1016/j.ceramint.2011.04.124  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:11  AU: Aoujgal, A.;Gharbi, W. A.;Outzourhit, A.;Ahamdane, H.;Ammar, A.;Tachafine, A.;Carru, J. C.;
7:1:55:9     Tetragonal tungsten bronze-type nanorod photocatalysts with tunnel structures: Ta substitution for Nb and overall water splitting
DOI:10.1039/c4ta01393j  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:5  AU: Wang, Ping;Schwertmann, Larissa;Marschall, Roland;Wark, Michael;
7:1:55:10     Fabrication of textured Sr2Na0.9K0.1Nb5O15 ceramics: Anisotropy in structures and electrical properties
DOI:10.1016/j.jeurceramsoc.2012.05.008  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Wei, Lingling;Han, Xiaokun;Li, Zhaohu;Yang, Zupei;
7:1:55:11     Phase formation, dielectric and ferroelectric properties of CaxBa1-xNb2O6 ceramics
DOI:10.1016/j.ceramint.2012.11.078  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Han, Xiaokun;Wei, Lingling;Yang, Zupei;Zhang, Ting;
7:1:55:12     Growth, electromechanical, and electro-optic properties of tungsten bronze (Ca(0.28)Ba(0.72))(0.25)(Sr(0.6)Ba(0.4))(0.75)Nb(2)O(6) single crystal
DOI:10.1063/1.3399604  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Gao, W. L.;Zhang, H. J.;Yin, X.;Song, H. L.;Wang, J. Y.;Jiang, M. H.;Boughton, R. I.;
7:1:55:13     Phase Transitional Behavior and Electrical Properties of Sr2K0.1Na0.9Nb5-xTaxO15 Ceramics
DOI:10.1111/j.1551-2916.2010.04177.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Wei, Lingling;Yang, Zupei;Ren, Hongmei;Chen, Xiubi;
7:1:55:14     Optical properties of rare-earth doped epitaxial Sr0.5Ba0.5Nb2O6 thin films grown by pulsed laser deposition
DOI:10.1016/j.tsf.2010.07.059  JN:THIN SOLID FILMS  PY:2010
  TC:6  AU: Yao, Y. B.;Liu, W. C.;Mak, C. L.;Wong, K. H.;Tam, H. L.;Cheah, K. W.;
7:1:55:15     A comparative study of Sr0.7Ba0.3Nb2O6 relaxor ferroelectric ceramics prepared by conventional and microwave sintering techniques
DOI:10.1016/j.ceramint.2012.12.001  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Li, Jinglei;Pu, Yongping;Wang, Zhuo;Dai, Jie;
7:1:55:16     Optical properties of epitaxial (Ba0.39Sr0.61)(6)Ti2Nb8O30 thin films grown by pulsed laser deposition
DOI:10.1016/j.tsf.2013.11.142  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Zhang, Y. L.;Yang, S. H.;Teng, D. D.;
7:1:55:17     The Phase Formation, Microstructure, and Electric Properties of Tungsten Bronze Ferroelectric Sr2NaNb5O15 Ceramics
DOI:10.1111/j.1551-2916.2010.03683.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Wei, Lingling;Yang, Zupei;Gu, Rui;Ren, Hongmei;
7:1:55:18     Role of structural changes in dielectric, ferroelectric properties of Sr2KxNa1-xNb5O15 lead-free ceramics
DOI:10.1016/j.matchemphys.2010.12.032  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:4  AU: Wei, Lingling;Yang, Zupei;Gu, Rui;Pan, Hong;
7:1:55:19     Polarization dynamics of polar nano-regions in Sr0.5Ba0.5Nb2O6 doped with combinations of Ce and Cr
DOI:10.1016/j.actamat.2010.11.036  JN:ACTA MATERIALIA  PY:2011
  TC:1  AU: Fang, Tsang-Tse;Chiu, Teng-Yi;
7:1:55:20     Dielectric and ferroelectric properties of Ba0.8Sr0.2Ti1-5x/4NbxO3 ceramics
DOI:10.1016/j.ceramint.2011.01.031  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:6  AU: Cao, Wan Q.;Yang, Li;Ismail, Mukhlis M.;Feng, Ping;
7:1:55:21     Defects, Structure Changes, and the Effect of Random Fields on the Displacement of Off-Center Ions in Sr0.5Ba0.5Nb2O6 Doped with Combinations of Ce and Cr
DOI:10.1111/j.1551-2916.2010.03745.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:1  AU: Fang, Tsang-Tse;Chung, Han-Yang;Lee, Chih-Hao;
7:1:55:22     Effect of doping with Nd3+ ions on the structural and ferroelectric properties of Ca0.28Ba0.72Nb2O6 single crystal
DOI:10.1016/j.materresbull.2010.05.024  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:3  AU: Gao, W. L.;Zhang, H. J.;Xia, S. Q.;Huang, B. B.;Liu, D.;Wang, J. Y.;Jiang, M. H.;Zheng, L. M.;Wang, J. F.;Lu, C. J.;
7:1:55:23     Preparation of Ba6Ti2Nb8O30 Thin Films by MOCVD using Ultrasonic Nebulization
DOI:10.1080/10584587.2012.663591  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Lee, Choon-Ho;Kim, Do-Woo;
7:1:56:1     Modeling of enhanced electrocaloric effect above the Curie temperature in relaxor ferroelectrics
DOI:10.1016/j.actamat.2011.05.030  JN:ACTA MATERIALIA  PY:2011
  TC:14  AU: Shi, Y. P.;Soh, A. K.;
7:1:56:2     Thermally activated switching kinetics in second-order phase transition ferroelectrics
DOI:10.1103/PhysRevB.82.024109  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Vopsaroiu, Marian;Blackburn, John;Cain, Markys G.;Weaver, Paul M.;
7:1:56:3     Modeling of polar nanoregions dynamics on the dielectric response of relaxors
DOI:10.1063/1.4809977  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Ni, Y.;Chen, H. T.;Shi, Y. P.;He, L. H.;Soh, A. K.;
7:1:56:4     Effects of volume evolution of static and dynamic polar nanoregions on the dielectric behavior of relaxors
DOI:10.1063/1.3632082  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Shi, Y. P.;Soh, A. K.;
7:1:56:5     Temperature dependence of polarization switching properties of Bi3.15Nd0.85Ti3O12 ferroelectric thin film
DOI:10.1063/1.3600237  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Zhang, Y.;Zhong, X. L.;Chen, Z. H.;Wang, J. B.;Zhou, Y. C.;
7:1:56:6     Thermally activated polarization dynamics under the effects of lattice mismatch strain and external stress in ferroelectric film
DOI:10.1063/1.4730779  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Zhang, Y.;Zhong, X. L.;Vopson, M.;Wang, J. B.;Zhou, Y. C.;
7:1:56:7     Effects of frequency and temperature evolution of polar nanoregions on susceptibility dispersion and polarization mechanism in relaxors
DOI:10.1063/1.3671673  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Shi, Y. P.;Soh, A. K.;
7:1:56:8     Temperature scaling behavior of dynamic hysteresis for (K,Na)NbO3 lead-free ferroelectric films
DOI:10.1063/1.4808351  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Li, Tao;Wang, Genshui;Du, Gang;Li, Kui;Chen, Ying;Zhou, Zhiyong;Cao, Fei;Dong, Xianlin;
7:1:56:9     Anisotropic mechanism on distinct transition modes of tip-activated multipolorizaion switching in epitaxial BiFeO3 films
DOI:10.1063/1.3532001  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Shi, Y. P.;Soh, A. K.;Weng, G. J.;
7:1:56:10     Abnormal polarization switching of relaxor terpolymer films at low temperatures
DOI:10.1063/1.4793188  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Tian, B. B.;Zhao, X. L.;Liu, B. L.;Wang, J. L.;Han, Li;Sun, J. L.;Meng, X. J.;Chu, J. H.;
7:1:56:11     Time-dependent three-dimensional domain reverse mechanism in nucleation, growth, and breakdown of ferroelectric films
DOI:10.1063/1.3437630  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Shi, Y. P.;Hong, L.;Soh, A. K.;
7:1:56:12     Write operation study of Co/BTO/LSMO ferroelectric tunnel junction
DOI:10.1063/1.4816474  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Wang, Z. H.;Zhao, W. S.;Kang, W.;Bouchenak-Khelladi, A.;Zhang, Y.;Klein, J. -O.;Ravelosona, D.;Chappert, C.;
7:1:56:13     Correlation Radius in Thin Ferroelectric Films
DOI:10.1080/00150193.2010.505796  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Glinchuk, M. D.;Morozovska, A. N.;Eliseev, E. A.;
7:1:56:14     First principles study of polarization-strain coupling in SrBi2Ta2O9
DOI:10.1063/1.4808215  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Yang, Qiong;Cao, Jue Xian;Ma, Ying;Zhou, Yi Chun;
7:1:57:1     X-ray absorption fine structure studies of Mn coordination in doped perovskite SrTiO3
DOI:10.1063/1.3298369  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:23  AU: Levin, I.;Krayzman, V.;Woicik, J. C.;Tkach, A.;Vilarinho, P. M.;
7:1:57:2     Intrinsic paramagnetism and aggregation of manganese dopants in SrTiO3
DOI:10.1103/PhysRevB.89.094418  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Zorko, A.;Pregelj, M.;Luetkens, H.;Axelsson, A. -K.;Valant, M.;
7:1:57:3     The Origin of Magnetism in Mn-Doped SrTiO3
DOI:10.1002/adfm.201102482  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:22  AU: Valant, Matjaz;Kolodiazhnyi, Taras;Arcon, Iztok;Aguesse, Frederic;Axelsson, Anna-Karin;Alford, Neil M.;
7:1:57:4     Origin of extrinsic dielectric loss in 1:2 ordered, single-phase BaMg1/3Ta2/3O3
DOI:10.1016/j.jeurceramsoc.2013.12.037  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Kolodiazhnyi, T.;
7:1:57:5     Spin Ordering in Mn-Doped KTaO3?
DOI:10.1021/cm100017s  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:12  AU: Valant, Matjaz;Kolodiazhnyi, Taras;Axelsson, Anna-Karin;Babu, Gunda Santosh;Alford, Neil M.;
7:1:57:6     Quantum confinement of Bi2S3 in glass with magnetic behavior
DOI:10.1063/1.4794155  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Panmand, Rajendra P.;Kulkarni, Milind V.;Valant, Matjaz;Gosavi, Suresh W.;Kale, Bharat B.;
7:1:57:7     Comment on "The Origin of Magnetism in Mn-Doped SrTiO3"
DOI:10.1002/adfm.201202314  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:3  AU: Tkach, Alexander;Vilarinho, Paula M.;Kleemann, Wolfgang;Shvartsman, Vladimir V.;Borisov, Pavel;Bedanta, Subhankar;
7:1:57:8     Response to "Comment on "The Origin of Magnetism in Mn-Doped SrTiO3'"
DOI:10.1002/adfm.201203487  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:6  AU: Valant, Matjaz;Kolodiazhnyi, Taras;Arcon, Iztok;Aguesse, Frederic;Axelsson, Anna-Karin;Alford, Neil M.;
7:1:57:9     Surface magnetism in ZnO/Co3O4 mixtures
DOI:10.1063/1.3294649  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Garcia, M. A.;Jimenez-Villacorta, F.;Quesada, A.;de la Venta, J.;Carmona, N.;Lorite, I.;Llopis, J.;Fernandez, J. F.;
7:1:57:10     Structural Investigation of Manganese Doped SrTiO3 Single Crystal and Ceramic
DOI:10.1080/00150193.2014.891916  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Mancini, G. F.;Ghigna, P.;Mozzati, M. C.;Galinetto, P.;Makarova, M.;Syrnikov, P.;Jastrabik, L.;Trepakov, V. A.;
7:1:57:11     Spin cluster glass and magnetoelectricity in Mn-doped KTaO3.
DOI:10.1063/1.3430990  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Shvartsman, V. V.;Bedanta, S.;Borisov, P.;Kleemann, W.;Tkach, A.;Vilarinho, P. M.;
7:1:57:12     X-ray irradiation-induced ionization of CdS1-xSex nanocrystals embedded in borosilicate glass
DOI:10.1063/1.3409111  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Azhniuk, Yu. M.;Prymak, M. V.;Lopushansky, V. V.;Solomon, A. M.;Hutych, Yu. I.;Gomonnai, A. V.;Zahn, D. R. T.;
7:1:57:13     Cube-shaped diffuse scattering and the ground state of BaMg1/3Ta2/3O3
DOI:10.1103/PhysRevB.86.104107  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Cervellino, A.;Gvasaliya, S. N.;Roessli, B.;Rotaru, G. M.;Cowley, R. A.;Lushnikov, S. G.;Shaplygina, T. A.;Bossak, A.;Chernyshov, D.;
7:1:57:14     Magnetoelectric Interactions in Mn- and Co-Doped Incipient Ferroelectrics from Density Functional Calculations
DOI:10.1080/00150193.2012.674410  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Kondakova, I. V.;Kuzian, R. O.;Laguta, V. V.;Dare, A. -M.;Raymond, L.;Hayn, R.;
7:1:57:15     Effect of the dry nanodispersion procedure in the magnetic order of the Co3O4 surface
DOI:10.1016/j.ceramint.2012.11.025  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Lorite, I.;Perez, L.;Romero, J. J.;Fernandez, J. F.;
7:1:57:16     Magnetism induced by boron impurities in amorphous silicon
DOI:10.1063/1.3565051  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Zhu, Y.;Du, C. L.;Shi, D. N.;Zhang, K. C.;Ma, C. L.;Gong, S. J.;Yang, Z. Q.;
7:1:57:17     Optical absorption of II-VI semiconductor-doped glasses exposed to 7 MeV electron irradiation
DOI:10.1016/j.optmat.2013.06.017  JN:OPTICAL MATERIALS  PY:2013
  TC:0  AU: Azhniuk, Yu M.;Gomonnai, A. V.;Lopushansky, V. V.;Megela, I. G.;Prymak, M. V.;Skoryk, M. A.;Yanchuk, I. B.;Zahn, D. R. T.;
7:1:58:1     Field enhanced bulk conductivity of acceptor-doped BaTi1-xCaxO3-x ceramics
DOI:10.1063/1.3476355  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:18  AU: Maso, Nahum;Prades, Marta;Beltran, Hector;Cordoncillo, Eloisa;Sinclair, Derek C.;West, Anthony R.;
7:1:58:2     Electrical conductivity spectra of Sn doped BaTi0.95Zr0.05O3
DOI:10.1063/1.4879679  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Dalal, Biswajit;Sarkar, Babusona;De, S. K.;
7:1:58:3     Mixed oxide ion and proton conduction and p-type semiconduction in BaTi0.98Ca0.02O2.98 ceramics
DOI:10.1039/c3tc00145h  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:8  AU: Ren, Pengrong;Maso, Nahum;Liu, Yang;Ma, Le;Fan, Huiqing;West, Anthony R.;
7:1:58:4     Field enhanced bulk conductivity of BaTiO3 : Mg ceramics
DOI:10.1039/c0jm00677g  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:17  AU: Prades, Marta;Maso, Nahum;Beltran, Hector;Cordoncillo, Eloisa;West, Anthony R.;
7:1:58:5     Voltage-dependent low-field resistivity of CaTiO3:Zn ceramics
DOI:10.1039/c1jm11453k  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:15  AU: Zhang, Qi-Long;Maso, Nahum;Liu, Yang;Yang, Hui;West, Anthony R.;
7:1:58:6     Voltage-dependent resistance of undoped rutile, TiO2, ceramics
DOI:10.1063/1.4848098  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Liu, Yang;West, Anthony R.;
7:1:58:7     Voltage-Dependent Low-Field Bulk Resistivity in BaTiO3:Zn Ceramics
DOI:10.1111/j.1551-2916.2009.03416.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:15  AU: Beltran, Hector;Prades, Marta;Maso, Nahum;Cordoncillo, Eloisa;West, Anthony R.;
7:1:58:8     Voltage-Dependent Bulk Resistivity of SrTiO3:Mg Ceramics
DOI:10.1111/jace.13004  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Gil Escrig, Lidon;Prades, Marta;Beltran, Hector;Cordoncillo, Eloisa;Maso, Nahum;West, Anthony R.;
7:1:58:9     Enhanced Conductivity and Nonlinear Voltage-Current Characteristics of Nonstoichiometric BaTiO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04458.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Beltran, Hector;Prades, Marta;Maso, Nahum;Cordoncillo, Eloisa;West, Anthony R.;
7:1:58:10     Semiconductor-Insulator Transition in Undoped Rutile, TiO2, Ceramics
DOI:10.1111/jace.12025  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Liu, Yang;West, Anthony R.;
7:1:58:11     A combinatorial nanoprecursor route for direct solid state chemistry: Discovery and electronic properties of new iron-doped lanthanum nickelates up to La4Ni2FeO10-delta
DOI:10.1016/j.ssi.2012.04.027  JN:SOLID STATE IONICS  PY:2012
  TC:1  AU: Alexander, Sam J.;Lin, Tian;Brett, Dan J. L.;Evans, Julian R. G.;Cibin, Giannantonio;Dent, Andrew;Sankar, Gopinathan;Darr, Jawwad A.;
7:1:58:12     Solid-state synthesis of Bi2O3/BaTiO3 heterostructure: preparation and photocatalytic degradation of methyl orange
DOI:10.1007/s00339-012-7331-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:7  AU: Ren, Pengrong;Fan, Huiqing;Wang, Xin;
7:1:58:13     Insulation degradation behavior of multilayer ceramic capacitors clarified by Kelvin probe force microscopy under ultra-high vacuum
DOI:10.1063/1.4791714  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Suzuki, Keigo;Okamoto, Takafumi;Kondo, Hiroyuki;Tanaka, Nobuhiko;Ando, Akira;
7:1:59:1:1     Electrical Properties of Lead-Free 0.98(Na0.5K0.5Li0.1)NbO3-0.02Ba(Zr0.52Ti0.48)O-3 Ceramics by Sintering Temperature
DOI:10.1007/s13391-012-2002-5  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:12  AU: Lee, Seung-Hwan;Kim, Hyun-Ju;Lee, Young-Hie;
7:1:59:1:2     Ferroelectric and Piezoelectric Properties of Lead-Free 0.98(Na0.5K0.5)NbO3-0.02Ba(Zr0.52Ti0.48)O-3 Ceramics with Various Sintering Temperatures
DOI:10.1007/s13391-012-1068-4  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:12  AU: Lee, Seung-Hwan;Baek, Sang-don;Kim, Hyun-Ju;Lee, Sung-Gap;Lee, Young-Hie;
7:1:59:1:3     Triangular Ferroelectric Domains of Highly (111)-oriented NaNbO3 Thin Film on a Glass Substrate
DOI:10.1007/s13391-013-3120-4  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:2  AU: Kim, Woo-Hee;Son, Jong Yeog;
7:1:59:1:4     Composition range and electrical properties of the morphotropic phase boundary in Bi-0.5(Na0.80K0.20)(0.5)TiO3-(Ba0.7Sr0.3)TiO3 system
DOI:10.1007/s13391-013-0027-z  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:1  AU: Jaita, Pharatree;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:1:59:1:5     Fabrication and properties of YBa2Cu3O7-x ceramics at different sintering temperatures
DOI:10.1007/s13391-013-0020-6  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:0  AU: Prayoonphokkharat, Poom;Jiansirisomboon, Sukanda;Watcharapasorn, Anucha;
7:1:59:1:6     Effect of Sintering Temperatures on the Piezoelectric and Dielectric Properties of 0.98(Na0.5K0.5)NbO3-0.02(Ba0.5Ca0.5)TiO3 Ceramics
DOI:10.1007/s13391-012-2160-5  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:1  AU: Kim, Seung-Hyun;Lee, Seung-Hwan;Kim, Hyun-Ju;Kim, Hong-Ki;Woo, Won-Seock;Lee, Sung-Gap;Lee, Young-Hie;
7:1:59:1:7     Synthesis of high-performance Li4Ti5O12 and its application to the asymmetric hybrid capacitor
DOI:10.1007/s13391-013-6032-4  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:4  AU: Lee, Byunggwan;Yoon, Jung Rag;
7:1:59:1:8     Numerical analysis framework for magnetostriction of ferromagnetic materials
DOI:10.1007/s13391-013-6021-7  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:0  AU: Choi, Deok-Kee;
7:1:59:2:1     Preparation of Homogeneous Microstructure Pure Lead Metaniobate by Two-Step Sintering
DOI:10.1007/s13391-013-3118-y  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:1  AU: Zhao, Xiao-gang;Liu, Peng;Chao, Bo;Liu, Su Juan;Pang, Ming;Chen, Xiao-ming;Zhou, Jian-ping;
7:1:59:2:2     Microstructure, Dielectric, and Piezoelectric Properties of Pb0.92Ba0.08Nb2O6-0.25 wt% TiO2 Ceramics: Effect of Sintering Temperature
DOI:10.1111/j.1551-2916.2011.04495.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Chen, XiaoMing;Ma, HaiYan;Ding, Wei;Zhang, Yu;Zhao, XiaoGang;Liang, Xiao;Liu, Peng;
7:1:59:2:3     Microstructure and dielectric properties of Pb0.94La0.06Nb2O6 ceramics
DOI:10.1016/j.ceramint.2011.05.009  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:5  AU: Chen, Xiao Ming;Zhao, Xiao Gang;Ding, Wei;Liu, Peng;
7:1:59:2:4     Effect of the Second Sintering Temperature on the Microstructure and Electrical Properties of PbNb2O6-0.5 wt.%ZrO2 Obtained via a Two-Step Sintering Process
DOI:10.1007/s11664-014-3263-6  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Zhao, Xiao-gang;Liu, Peng;Chen, Xiao-ming;Chao, Bo;Liu, Su Juan;Pang, Ming;Zhou, Jian-ping;
7:1:59:2:5     Crystallite structure, microstructure, dielectric, and piezoelectric properties of (Pb1.06-xBax)(Nb0.94Ti0.06)(2)O-6 piezoelectric ceramics prepared using calcined powders with different phases
DOI:10.1016/j.matchemphys.2013.11.015  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:2  AU: Chen, Xiao-ming;Wang, Jian;Liang, Xiao-xia;Sun, Kai;Zhou, Jian-ping;Liu, Peng;
7:1:59:3:1     Piezoelectric and Dielectric Properties of (Na0.44K0.52)Nb0.84O3-Li-0.04(Sb0.06Ta0.1)O-3 Ceramics with Sintering Temperature
DOI:10.1007/s13391-011-0905-1  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:9  AU: Lee, Seung-Hwan;Lee, Young-Hie;
7:1:59:3:2     Characterization and Modeling of an Acoustic Sensor Using AlN Thin-Film for Frequency Selectivity
DOI:10.1007/s13391-013-3048-8  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:1  AU: Kim, Sangwon;Song, Won Joon;Tang, Jongmoon;Jang, Jeong Hun;Choi, Hongsoo;
7:1:59:3:3     Piezoelectric Performance of Continuous Beam and Narrow Supported Beam Arrays for Artificial Basilar Membranes
DOI:10.1007/s13391-014-4053-2  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:2  AU: Song, Won Joon;Jang, Jongmoon;Kim, Sangwon;Choi, Hongsoo;
7:1:59:3:4     The Effects of Residual Stresses in the Composite Diaphragm on the Performance of Piezoelectric Microspeakers
DOI:10.1007/s13391-012-2141-8  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:3  AU: Ur, Soon-Chul;Kim, Eun-Sok;Yi, SeungHwan;
7:1:59:3:5     Dielectric and Piezoelectric, Properties of 0.95(Na0.5K0.5)NbO3-0.05CaTiO(3) Ceramics with Ag2O Contents
DOI:10.1007/s13391-012-2072-4  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:2  AU: Lee, Seung-Hwan;Baek, Sang-Don;Kim, Hyun-Ju;Kim, Seung-Hyun;Lee, Sung-Gap;Kim, Dae-Young;Lee, Young-Hie;Nam, Sung-Pill;Lee, Ku-Tak;
7:1:59:4:1     Influence of the sintering temperature and Ag2O dopants on microstructure and piezoelectric properties of 0.94(K0.5Na0.5) NbO3-0.06LiNbO(3) lead-free ceramics
DOI:10.1016/j.jallcom.2013.11.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Chae, Moon-Soon;Koh, Jung-Hyuk;Lee, Sang-Kwon;
7:1:59:4:2     Effects of calcination temperature on the piezoelectric properties of lead-free Ag doped (Na,K)NbO3-LiTaO3 piezoelectric ceramics
DOI:10.1016/j.jallcom.2012.11.155  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Shin, Dong-Jin;Koh, Jung-Hyuk;
7:1:59:4:3     Electrical Properties of Lead-free 0.98(Na0.5K0.5Lix)NbO3-0.02Ba(Zr0.52Ti0.48)O-3 Ceramics
DOI:10.1007/s13391-011-1063-1  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:2  AU: Lee, Seung-Hwan;Kim, Hyun-Ju;Lee, Sung-Gap;Koh, Jung-Hyuk;Baek, Sang-Don;Lee, Young-Hie;
7:1:59:4:4     Li2O excess (Na0.51K0.47Li0.02)(Nb0.8Ta0.2)O-3 lead free piezoelectric ceramics
DOI:10.1016/j.ceramint.2011.04.111  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Moon, Sang-Ho;Ham, Yong-Su;Yun, Seok-Woo;Lee, Kyoung-Soo;Koo, Sang-Mo;Ha, Jae-Geun;Jeong, Soon-Jong;Kim, Min-Soo;Koh, Jung-Hyuk;
7:1:59:5:1     Effect of reaction sintering process on the microwave dielectric properties of Ba2Ti9O20 materials
DOI:10.1016/j.jeurceramsoc.2009.04.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Lin, I-Nan;Chang, Chi-Ben;Leou, Keh-Chyang;Cheng, Hsiu-Fung;
7:1:59:5:2     Dispersion of BaTi4O9 powders in aqueous solutions with PAMCOB copolymer
DOI:10.1016/j.ceramint.2011.07.004  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Chung, Tzu-Min;Hsu, Kung-Chung;
7:1:60:1:1     Magnetostriction and anisotropy compensation in TbxDy0.9-xNd0.1Fe1.93 [0.2 <= x <= 0.4]
DOI:10.1063/1.3525577  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Jammalamadaka, S. Narayana;Markandeyulu, G.;Balasubramaniam, Krishnan;
7:1:60:1:2     Magnetostriction of TbxDy0.9-xNd0.1(Fe0.8Co0.2)(1.93) compounds and their composites (0.20 <= x <= 0.60)
DOI:10.1016/j.jallcom.2013.08.092  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Yin, H. Y.;Liu, J. J.;Pan, Z. B.;Liu, X. Y.;Liu, X. C.;Liu, L. D.;Du, J.;Si, P. Z.;
7:1:60:1:3     Giant low-field magnetostriction of epoxy/TbxDy1-x(Fe0.8Co0.2)(2) composites (0.20 <= x <= 0.40)
DOI:10.1063/1.4816417  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Liu, J. J.;Pan, Z. B.;Si, P. Z.;Du, J.;
7:1:60:1:4     Structure and magnetostriction of Tb1-xNdx(Fe0.8Co0.2)(1.93) alloys
DOI:10.1016/j.matchemphys.2012.04.001  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:8  AU: Yin, H. Y.;Liu, J. J.;Wang, R.;Liu, X. C.;Sun, N. K.;
7:1:60:1:5     Structural, magnetic and magnetostrictive properties of Laves-phase compounds TbxHo0.9-xNd0.1Fe1.93 (0 <= x <= 0.40)
DOI:10.1016/j.matchemphys.2014.07.015  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Pan, Z. B.;Liu, J. J.;Liu, X. Y.;Wang, J.;Du, J.;Si, P. Z.;
7:1:60:1:6     Anisotropy compensation and high low-field magnetostriction of epoxy/Tb1-xHox(Fe0.8Co0.2)(2) composites (0.60 <= x <= 1.0)
DOI:10.1016/j.jallcom.2011.05.012  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Liu, J. J.;Ying, H. Y.;Liu, X. C.;Si, P. Z.;
7:1:60:1:7     Structural, magnetic and magnetostrictive properties of Co-doped Tb1-xHoxFe2 (0 <= x <= 1.0) alloys
DOI:10.1063/1.3647757  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Liu, J. J.;Wang, R.;Ying, H. Y.;Liu, X. C.;Du, J.;
7:1:60:1:8     Structure and magnetostriction of Tb0.4Nd0.6(Fe0.8Co0.2)(x) alloys
DOI:10.1007/s00339-014-8329-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Pan, Z. B.;Liu, J. J.;Wang, R.;Liu, X. Y.;Wang, J.;Sun, N. K.;Si, P. Z.;
7:1:60:2:1     Grain-< 111 >-oriented anisotropy in the bonded giant magnetostrictive material
DOI:10.1063/1.3350891  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Meng, Hao;Zhang, Tianli;Jiang, Chengbao;Xu, Huibin;
7:1:60:2:2     The stress-induced anisotropy in the (110) plane of the magnetostrictive TbDyFe [110] oriented crystal
DOI:10.1063/1.3480814  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Wang, Zhibin;Liu, Jinghua;Jiang, Chengbao;Xu, Huibin;
7:1:60:2:3     The stress dependence of magnetostriction hysteresis in TbDyFe [110] oriented crystal
DOI:10.1063/1.3596823  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Wang, Zhibin;Liu, Jinghua;Jiang, Chengbao;Xu, Huibin;
7:1:60:2:4     A study on laminated structures in Terfenol-D/Epoxy particulate composite with enhanced magnetostriction
DOI:10.1063/1.4884608  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Du, Tian;Zhang, Tianli;Meng, Hao;Zhou, Xiaoming;Jiang, Chengbao;
7:1:60:2:5     Cut-off frequency of magnetostrictive materials based on permeability spectra
DOI:10.1016/j.jmmm.2012.01.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Meng, Hao;Zhang, Tianli;Jiang, Chengbao;
7:1:60:2:6     Magnetostriction under high prestress in Fe81Ga19 crystal
DOI:10.1063/1.3456502  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Liu, Jinghua;Wang, Zhibin;Jiang, Chengbao;Xu, Huibin;
7:1:60:3:1     Magnetomechanical properties of epoxy-bonded Sm1-xNdxFe1.55 (0 <= x <= 0.56) pseudo-1-3 magnetostrictive particulate composites
DOI:10.1016/j.jallcom.2011.01.138  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Yang, Fang;Leung, Chung Ming;Or, Siu Wing;Liu, Wei;Lv, Xiangke;Zhang, Zhidong;
7:1:60:3:2     The compressive stress effect on the magnetostriction and magnetization for Sm-Dy-Fe composites
DOI:10.1063/1.3670066  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Wang, Bowen;Wang, Zhihua;Hao, Yanming;Weng, Ling;Huang, Wenmei;Yan, Weili;
7:1:60:3:3     Structural, magnetic properties and magnetostriction studies of Sm1-xNdxFe1.55 alloys
DOI:10.1016/j.jmmm.2010.01.039  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:6  AU: Yang, F.;Liu, W.;Lv, X. K.;Li, B.;Li, S. Q.;Li, J.;Zhang, Z. D.;
7:1:60:3:4     Structure, magnetic and magnetostrictive properties of Sm0.7Pr0.3Fex alloys
DOI:10.1016/j.matlet.2009.12.017  JN:MATERIALS LETTERS  PY:2010
  TC:7  AU: Yang, F.;Liu, W.;Li, S. Q.;Lv, X. K.;Li, J.;Zhang, Z. D.;
7:1:60:3:5     Dynamic magnetoelastic properties of epoxy-bonded Sm0.88Nd0.12Fe1.93 pseudo-1-3 negative magnetostrictive particulate composite
DOI:10.1063/1.3679045  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Yang, Fang;Leung, Chung Ming;Or, Siu Wing;Liu, Wei;Zhang, Zhidong;Duan, Yuan-Feng;
7:1:60:4:1     Effect of B and C doping on structure and magnetostriction of high-Pr content alloys
DOI:10.1016/j.matchemphys.2011.07.007  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:3  AU: Gu Zhengfei;Deng Ting;Li Junqin;Cheng Gang;Geng Shengdong;Gao Xinqiang;Ao Daichao;Du Yusong;
7:1:60:4:2     High magnetostriction at low fields of (Tb1-xDyx)(0.2)Pr-0.8(Fe0.4Co0.6)(1.88)C-0.05 intermetallic compounds
DOI:10.1016/j.jmmm.2010.01.001  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:2  AU: Gu, Z. F.;Jiang, M. H.;Huang, Z. F.;Cheng, G.;Li, J. Q.;Han, Q. Y.;
7:1:61:1     High spatial resolution structure of (K,Na)NbO3 lead-free ferroelectric domains
DOI:10.1039/c2jm30483j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:26  AU: Rubio-Marcos, Fernando;Del Campo, Adolfo;Lopez-Juarez, Rigoberto;Romero, Juan J.;Fernandez, Jose F.;
7:1:61:2     Interfacial coupling in multiferroic/ferromagnet heterostructures
DOI:10.1103/PhysRevB.87.134426  JN:PHYSICAL REVIEW B  PY:2013
  TC:9  AU: Trassin, M.;Clarkson, J. D.;Bowden, S. R.;Liu, Jian;Heron, J. T.;Paull, R. J.;Arenholz, E.;Pierce, D. T.;Unguris, J.;
7:1:61:3     New insights into the properties of KxNa(1-x)NbO3 ceramics obtained by hydrothermal synthesis
DOI:10.1016/j.ceramint.2014.06.059  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Ramajo, Leandro A.;Rubio-Marcos, Fernando;Del Campo, Adolfo;Fernandez, Jose F.;Castro, Miriam S.;Parra, Rodrigo;
7:1:61:4     Resolution of the ferroelectric domains structure in (K,Na)NbO3-based lead-free ceramics by confocal Raman microscopy
DOI:10.1063/1.4802096  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Rubio-Marcos, F.;Del Campo, A.;Fernandez, J. F.;
7:1:61:5     Direct Scanning Electron Microscopy Imaging of Ferroelectric Domains After Ion Milling
DOI:10.1111/j.1551-2916.2009.03392.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Gruner, Daniel;Shen, Zhijian;
7:1:61:6     Ferroelectric domain structure of lead-free potassium-sodium niobate ceramics
DOI:10.1016/j.jeurceramsoc.2011.02.031  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Lopez-Juarez, Rigoberto;Novelo-Peralta, Omar;Gonzalez-Garcia, Federico;Rubio-Marcos, Fernando;Villafuerte-Castrejon, Maria-Elena;
7:1:61:7     Ferroelectric Domain Characterization of Orthorhombic Sodium-Potassium Niobate Piezoelectric Crystals
DOI:10.1111/j.1551-2916.2010.03919.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Inagaki, Yumi;Kakimoto, Ken-ichi;Kagomiya, Isao;
7:1:61:8     Crystal growth and ferroelectric property of Na0.5K0.5NbO3 and Mn-doped Na0.5K0.5NbO3 crystals grown by floating zone method
DOI:10.1016/j.jeurceramsoc.2009.05.050  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:20  AU: Inagaki, Yumi;Kakimoto, Ken-ichi;Kagomiya, Isao;
7:1:61:9     Simultaneous imaging of the ferromagnetic and ferroelectric structure in multiferroic heterostructures
DOI:10.1063/1.4890055  JN:APL MATERIALS  PY:2014
  TC:3  AU: Unguris, J.;Bowden, S. R.;Pierce, D. T.;Trassin, M.;Ramesh, R.;Cheong, S. -W.;Fackler, S.;Takeuchi, I.;
7:1:61:10     Conductive coatings with low carbon-black content by adding carbon nanofibers
DOI:10.1016/j.compscitech.2013.12.021  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2014
  TC:4  AU: Enriquez, E.;de Frutos, J.;Fernandez, J. F.;de la Rubia, M. A.;
7:1:61:11     Ferroelectric polarization and domain walls in orthorhombic (K1-xNax)NbO3 lead-free ferroelectric ceramics
DOI:10.1063/1.3442905  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Lu, Ning;Yu, Rong;Cheng, Zhiying;Dai, Yejing;Zhang, Xiaowen;Zhu, Jing;
7:1:61:12     Effect of the Addition of B2O3 on the Density, Microstructure, Dielectric, Piezoelectric and Ferroelectric Properties of K0.5Na0.5NbO3 Ceramics
DOI:10.1007/s11664-013-2939-7  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Bharathi, P.;Varma, K. B. R.;
7:1:61:13     Effect of elemental diffusion on temperature coefficient of piezoelectric properties in KNN-based lead-free composites
DOI:10.1007/s10853-010-4550-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:3  AU: Ahn, Cheol-Woo;Park, Chee-Sung;Dittmer, Robert;Hong, Soon-Hyung;Priya, Shashank;
7:1:62:1     Dense KSr2Nb5O15 ceramics with uniform grain size prepared by molten salt synthesis
DOI:10.1016/j.jallcom.2014.07.155  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Liu, Liangliang;Gao, Feng;Zhang, Yong;Sun, Huajun;
7:1:62:2     Microstructure and electrical properties of potassium strontium niobate (KSr2Nb5O15) ceramics
DOI:10.1016/j.jallcom.2013.05.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Liu, Liangliang;Gao, Feng;Hu, Guoxin;Liu, Jiangnan;Li, Jinjin;
7:1:62:3     Effect of excess Nb2O5 on the growth behavior of KSr2Nb5O15 particles by molten salt synthesis
DOI:10.1016/j.powtec.2012.11.040  JN:POWDER TECHNOLOGY  PY:2013
  TC:9  AU: Liu, Liangliang;Gao, Feng;Hu, Guoxin;Liu, Jiangnan;
7:1:62:4     Phase field simulation for the evolution of textured ceramics microstructure
DOI:10.1016/j.ceramint.2012.03.053  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Liu, Liangliang;Gao, Feng;Hu, Guoxin;Liu, Jiangnan;
7:1:62:5     Preparation and Piezoelectricity of NaNbO3 High-Density Ceramics by Molten Salt Synthesis
DOI:10.1111/j.1551-2916.2011.04685.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Ge, Haiyan;Hou, Yudong;Xia, Chuan;Zhu, Mankang;Wang, Hao;Yan, Hui;
7:1:62:6     Texture development and dielectric relaxor behavior of 0.80Na(0.5)Bi(0.5)TiO(3)-0.20K(0.5)Bi(0.5)TiO(3) ceramics templated by plate-like NaNbO3 particles
DOI:10.1016/j.jeurceramsoc.2011.07.018  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:13  AU: Gao Feng;Liu Liangliang;Xu Bei;Hu GuoXin;Cao Xiao;Hong Rongzi;Tian Changsheng;
7:1:62:7     Molten salt synthesis of acicular sodium strontium niobate particles
DOI:10.1016/j.mseb.2013.09.002  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:2  AU: Liu, Liangliang;Gao, Feng;Li, Jinjin;Liu, Jiangnan;Hu, Guoxin;Sun, Huajun;
7:1:62:8     Fabrication of KSr2Nb5O15 particles with high aspect ratio by two-step molten salt synthesis
DOI:10.1016/j.apt.2013.04.002  JN:ADVANCED POWDER TECHNOLOGY  PY:2014
  TC:2  AU: Liu, Liangliang;Gao, Feng;Hu, Guoxin;Liu, Jiangnan;
7:1:62:9     Densification and texture evolution of Bi4Ti3O12 templated Na0.5Bi0.5TiO3-BaTiO3 ceramics: Effects of excess Bi2O3
DOI:10.1016/j.jallcom.2011.11.061  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Su, Shi;Zuo, Ruzhong;Lv, Danya;
7:1:62:10     Preparation of single crystalline NaSr2Nb5O15 particles with acicular morphology
DOI:10.1016/j.powtec.2013.05.029  JN:POWDER TECHNOLOGY  PY:2013
  TC:4  AU: Liu, Liangliang;Gao, Feng;Hu, Guoxin;Liu, Jiangnan;
7:1:62:11     Electrical Properties of 1-3 Piezocomposites Prepared from Textured KSr2Nb5O15 (KSN) Ceramic Fibers
DOI:10.1080/00150193.2011.594770  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Dursun, Sinan;Alkoy, Sedat;
7:1:62:12     Enhanced Electrical Properties of Bi4Ti3O12-modified (K0.5N0.5)NbO3 Lead-free Piezoceramics
DOI:10.1080/00150193.2013.850946  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Wang, Zhuo;Xiao, Ding-Quan;Wu, Jia-Gang;Liang, Wen-Feng;Wu, Wenjuan;Huang, Tao;Zhu, Jian-Guo;
7:1:63:1     Thermal Expansion, Ferroelectric and Magnetic Properties in (1-x)PbTiO3-xBi(Ni1/2Ti1/2)O-3
DOI:10.1021/ja908014u  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:27  AU: Hu, Penghao;Chen, Jun;Deng, Jinxia;Xing, Xianran;
7:1:63:2     Presence of a monoclinic (Pm) phase in the morphotropic phase boundary region of multiferroic (1-x)Bi(Ni1/2Ti1/2)O-3-xPbTiO(3) solid solution: A Rietveld study
DOI:10.1063/1.4891106  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Pandey, Rishikesh;Singh, Akhilesh Kumar;
7:1:63:3     Ferroic characterizations, phase transformation, and internal bias field in 0.75Pb(Fe2/3W1/3)O-3-0.25PbTiO(3) multiferroic ceramic
DOI:10.1063/1.4896875  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zheng, Mupeng;Hou, Yudong;Ai, Zhirong;Zhu, Mankang;
7:1:63:4     Correlations between tetragonality, polarization, and ionic displacement in PbTiO3-derived ferroelectric perovskite solid solutions
DOI:10.1103/PhysRevB.82.134113  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Qi, Tingting;Grinberg, Ilya;Rappe, Andrew M.;
7:1:63:5     Magnetic enhancement and low thermal expansion of (1-x-y)PbTiO3-xBi(Ni1/2Ti1/2)O-3-yBiFeO(3)
DOI:10.1039/c1jm12410b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:7  AU: Hu, Penghao;Kang, Huajun;Chen, Jun;Deng, Jinxia;Xing, Xianran;
7:1:63:6     Growth and Electrical Properties of 25%Bi(Ni1/2Ti1/2)O-3-75%PbTiO3 Thin Films on Pt/TiO2/SiO2/Si Substrates Using Pulsed Laser Deposition Method
DOI:10.1111/j.1551-2916.2011.04555.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Wu, Guangheng;Zhou, Hong;Qin, Ni;Bao, Dinghua;
7:1:63:7     High piezoelectric and mechanical performances in multiferroic (1-x-y) PbTiO3-xBi(Ni1/2Ti1/2)O-3-yBiScO(3)
DOI:10.1039/c2jm15952j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:3  AU: Hu, Penghao;Chen, Jun;Yu, Ziyou;Zhou, Lili;Deng, Jinxia;Xing, Xianran;
7:1:63:8     Synthesis, Structural Characterization, and Properties of Perovskites Belonging to the xBiMnO(3)-(1-x) PbTiO3 System
DOI:10.1021/cm903516t  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:8  AU: Castro, Alicia;Vila, Eladio;Jimenez, Ricardo;Hernandez-Velasco, Jorge;Hungria, Teresa;Alguero, Miguel;
7:1:63:9     Multiferroics and electronic structure of (1-x)PbTiO3-xBi(Ni1/2Ti1/2)O-3 thin films
DOI:10.1016/j.tsf.2013.07.007  JN:THIN SOLID FILMS  PY:2013
  TC:0  AU: Zhao, Hanqing;Wang, Jiaou;Sun, Ce;Chen, Jun;Ablat, Abduleziz;Muhemmed, Emin;Ibrahim, Kurash;Qiao, Shizhang;Qiao, Lijie;Xing, Xianran;
7:1:63:10     Growth and ferroelectric properties of sol-gel derived Bi(Mg1/2Zr1/2)O-3-PbTiO3 thin films
DOI:10.1016/j.ceramint.2013.09.120  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Zhang, Linxing;Chen, Jun;Yin, Lu;Zhao, Hanqing;Fan, Longlong;Cao, Jiangli;Xing, Xianran;
7:1:63:11     Anelastic Characterization of Pb(Fe2/3W1/3)O-3 Multiferroic Ceramics
DOI:10.1080/00150193.2012.675782  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Fraygola, B.;Garcia, D.;Eiras, J. A.;
7:1:63:12     TEM and SAED Characterization of Metakaolin. Pozzolanic Activity
DOI:10.1111/j.1551-2916.2012.05325.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Trusilewicz, L.;Fernandez-Martinez, F.;Rahhal, V.;Talero, R.;
7:1:63:13     Aluminum Incorporation in the C-S-H Phase of White Portland Cement-Metakaolin Blends Studied by Al-27 and Si-29 MAS NMR Spectroscopy
DOI:10.1111/jace.13006  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Dai, Zhuo;Tran, Thuan T.;Skibsted, Jorgen;
7:1:63:14     B-site Dopant Effect on the Thermal Expansion in the (1-x)PbTiO3-xBiMeO(3) Solid Solution (Me = Fe, In, Sc)
DOI:10.1111/j.1551-2916.2011.04632.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Hu, Penghao;Chen, Jun;Sun, Ce;Deng, Jinxia;Xing, Xianran;
7:1:63:15     Temperature and pressure effects of multiferroic Bi2NiTiO6 compound
DOI:10.1063/1.4801630  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Zhu, Jinlong;Feng, Shaomin;Liu, Qingqing;Zhang, Jianzhong;Xu, Hongwu;Li, Yanchun;Li, Xiaodong;Liu, Jing;Huang, Qingzhen;Zhao, Yusheng;Jin, Changqing;
7:1:63:16     Low temperature phenomena in ferroic BiMO3-PbTiO3 (M: Mn and Sc)
DOI:10.1063/1.3591176  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Alguero, M.;Jimenez, R.;Amorin, H.;Vila, E.;Castro, A.;
7:1:63:17     Structural, Dielectric, and Ferroelectric Properties of BiAlO3-PbTiO3 Solid Solution Thin Films on Indium Tin Oxide-Coated Glass Substrates
DOI:10.1111/j.1551-2916.2009.03495.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Wu, Guangheng;Zhou, Hong;Zhou, Xiaoye;Qin, Ni;Bao, Dinghua;
7:1:63:18     Electroelastic study of the relaxor-normal phase transition in PFW-PT solid solution
DOI:10.1016/j.materresbull.2013.07.038  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:0  AU: Fraygola, B.;Eiras, J. A.;
7:1:64:1     Effects of Eu substitution on luminescent and magnetic properties of BaTiO3 nanomaterials
DOI:10.1016/j.jallcom.2013.02.127  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:11  AU: Fuentes, S.;Barraza, N.;Veloso, E.;Villarroel, R.;Llanos, J.;
7:1:64:2     Self-activated luminescence characteristics of double perovskite ceramic Sr2ZrCeO6
DOI:10.1016/j.ceramint.2013.07.061  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Park, Cheol Woo;Seo, Hyo Jin;
7:1:64:3     Effects of multi-doping of rare-earth oxides on the microstructure and dielectric properties of BaTiO3
DOI:10.1016/j.jallcom.2010.04.085  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:21  AU: Jo, Soo Kyong;Park, Jae Sung;Han, Young Ho;
7:1:64:4     Synthesis, structural characterization and dielectric properties of Nb doped BaTiO3/SiO2 core-shell heterostructure
DOI:10.1016/j.jallcom.2013.10.228  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:9  AU: Cernea, M.;Vasile, B. S.;Boni, A.;Iuga, A.;
7:1:64:5     Influence of A-site Gd doping on the microstructure and dielectric properties of Ba(Zr0 1Ti0 9)O-3 ceramics
DOI:10.1016/j.jallcom.2010.09.211  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:11  AU: Reddy, S. Bhaskar;Rao, K. Prasad;Rao, M. S. Ramachandra;
7:1:64:6     Structural, electrical and optical properties of Ba(Ti-1-xYb(4x/3))O-3 ceramics
DOI:10.1016/j.ceramint.2013.05.070  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Ganguly, M.;Rout, S. K.;Ahn, C. W.;Kim, I. W.;Kar, Manoranjan;
7:1:64:7     Characterization and Rietveld Refinement of A-site deficient Lanthanum doped Barium Titanate
DOI:10.1016/j.jallcom.2013.06.104  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:13  AU: Ganguly, M.;Rout, S. K.;Sinha, T. P.;Sharma, S. K.;Park, H. Y.;Ahn, C. W.;Kim, I. W.;
7:1:64:8     Multiferroicity in Ba0.97La0.03Ti1-xNixO3 (0.03 <= x <= 0.07) ceramics
DOI:10.1016/j.jallcom.2014.06.147  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Sharma, Neha;Gaur, Anurag;Gaur, Umesh Kumar;Kotnala, R. K.;
7:1:64:9     Study of electrochemical hydrogen charge/discharge properties of FePO4 for application as negative electrodes in hydrogen batteries
DOI:10.1016/j.ceramint.2013.01.089  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Lim, Dae-Kwang;Singh, Bhupendra;Kang, Jungwon;Kim, Jaekook;Song, Sun-Ju;
7:1:64:10     Synthesis and luminescence properties of La2Ti2O7:Er3+ nanocrystals with pyrochlore structure
DOI:10.1016/j.jallcom.2012.07.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Li, Xinshuan;Cai, Hongtao;Ding, Linghong;Dou, Xinwang;Zhang, Weifeng;
7:1:64:11     Substitution behavior of x(Na0.5K0.5)NbO3-(1-x) BaTiO3 ceramics for multilayer ceramic capacitors by a near edge x-ray absorption fine structure analysis
DOI:10.1063/1.4886579  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ha, Jooyeon;Ryu, Jiseung;Lee, Heesoo;
7:1:64:12     Preparation and magnetic properties of electrospun Co/BaTiO3 heterostructured nanofibers
DOI:10.1016/j.jallcom.2014.05.080  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Li, Heping;Xue, Lihong;Yan, Youwei;
7:1:64:13     An Investigation into the Electrical Properties of Doped Barium Titanate Using Electrical Impedance Spectroscopy (EIS)
DOI:10.1080/00150193.2013.822286  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Dale, Graham;Conway, Michael;Strawhorne, Maureen;McLaughlin, Jim;
7:1:64:14     Studies of Dielectric Properties of Rare Earth (Y, Gd, Yb) Doped Barium Titanate Sintered in Pure Nitrogen
DOI:10.1080/00150193.2010.484757  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Li, Yanxia;Hao, Yingbin;Wang, Xusheng;Yao, Xi;
7:1:64:15     Effects of Bi2O3 and Yb2O3 on the Curie Temperature in BaTiO3-Based Ceramics
DOI:10.1111/j.1551-2916.2010.03633.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:14  AU: Yao, Guofeng;Wang, Xiaohui;Yang, Yang;Li, Longtu;
7:1:64:16     Mechanical niobium doping in barium titanate electroceramics
DOI:10.1016/j.jallcom.2013.06.187  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Velasco-Davalos, I. A.;Ruediger, A.;Cruz-Rivera, J. J.;Gomez-Yanez, C.;
7:1:64:17     Effects of size reduction on the structure and magnetic properties of core-shell Ni3Si/silica nanoparticles prepared by electrochemical synthesis
DOI:10.1016/j.jallcom.2013.09.035  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Pigozzi, Giancarlo;Mukherji, Debashis;Elerman, Yalcin;Strunz, Pavel;Gilles, Ralph;Hoelzel, Markus;Barbier, Bruno;Schmutz, Patrik;
7:1:65:1     Influence of processing conditions on the grain growth and electrical properties of barium zirconate titanate ferroelectric ceramics
DOI:10.1016/j.jallcom.2011.11.012  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:22  AU: Jha, Priyanka Arora;Jha, A. K.;
7:1:65:2     Synthesis and characterization of nanocrystalline ferroelectric Sr0.8Bi2.2Ta2O9 by conventional and microwave sintering: A comparative study
DOI:10.1016/j.materresbull.2012.12.049  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Sugandha;Jha, A. K.;
7:1:65:3     Structural and electrical properties of Ba5-xCaxSmTi3Nb7O30 (x=0-5) ferroelectric ceramics
DOI:10.1016/j.jallcom.2010.01.118  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:13  AU: Ganguly, Prasun;Jha, A. K.;
7:1:65:4     Investigation and characterization of Pb(Zr0.52Ti0.48)O-3 nanocrystalline ferroelectric ceramics: By conventional and microwave sintering methods
DOI:10.1016/j.matchemphys.2010.11.023  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:10  AU: Ramana, M. Venkata;Kiran, S. Roopas;Reddy, N. Ramamanohar;Kumar, K. V. Siva;Murthy, V. R. K.;Murty, B. S.;
7:1:65:5     Synthesis and Characterization of Tungsten-Bronze Structured Nanocrystalline Ba5SmTi3Nb7O30 Ferroelectric Ceramics by High-Energy Ball Milling
DOI:10.1111/j.1551-2916.2010.04321.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Ganguly, Prasun;Jha, Arun K.;
7:1:65:6     Structural and Dielectric Investigations of Bismuth Excess Strontium Bismuth Tantalate Ferroelectric Ceramics
DOI:10.1080/00150193.2011.594025  JN:FERROELECTRICS  PY:2011
  TC:5  AU: Jha, A. K.;Sugandha;
7:1:65:7     Effect of the Sintering Temperature on Nanocrystalline Non-stoichiometric Sr0.8Bi2.2Ta2O9 Ferroelectric Ceramics
DOI:10.1080/00150193.2013.849518  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Sugandha;Jha, A. K.;
7:1:65:8     Enhanced characteristics of Ba5SmTi3Nb7O30 ferroelectric nanocrystalline ceramic prepared by mechanical activation process: A comparative study
DOI:10.1016/j.materresbull.2011.01.016  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:9  AU: Ganguly, Prasun;Jha, A. K.;
7:1:65:9     Dielectric behavior of (1-x) Ba Zr0.025Ti0.975O3-(x) BiFeO3 solid solutions
DOI:10.1016/j.materresbull.2012.10.017  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:6  AU: Jha, Priyanka A.;Jha, Pardeep K.;Jha, A. K.;Dwivedi, R. K.;
7:1:65:10     Effect of holmium substitution on electrical properties of strontium bismuth tantalate ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.05.056  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Sugandha;Jha, A. K.;
7:1:65:11     Yttrium Substituted Sr0.8Bi2.2Ta2O9 Ferroelectric Compound: Effect on Microstructural and Electrical Properties
DOI:10.1080/00150193.2013.821929  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Sugandha;Jha, A. K.;
7:1:65:12     Nanocrystalline non-stoichiometric SBT: Effect of milling duration on structural and electrical characteristics
DOI:10.1016/j.matchar.2011.12.011  JN:MATERIALS CHARACTERIZATION  PY:2012
  TC:4  AU: Sugandha;Jha, A. K.;
7:1:65:13     Effect of holmium substitution on structural and electrical properties of barium zirconate titanate ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.10.087  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Jha, Priyanka A.;Jha, A. K.;
7:1:65:14     Observation of crystallization and characterizations on thiourea cadmium iodide: A semi-organic optical material
DOI:10.1016/j.materresbull.2013.06.005  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:0  AU: Singh, Preeti;Hasmuddin, Mohd;Abdullah, M. M.;Shkir, Mohd;Wahab, M. A.;
7:1:65:15     Phase transformation and two-mode phonon behavior of (1-x) [Ba Zr0.025Ti0.975O3]-(x) [BiFeO3] solid solutions
DOI:10.1016/j.jallcom.2014.02.118  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Jha, Priyanka A.;Jha, Pardeep K.;Jha, A. K.;Kotnala, R. K.;Dwivedi, R. K.;
7:1:65:16     The Effect of Process on Ferroelectric and Magnetic Properties in Bi5Fe0.5Co0.5Ti3O15 Thin Films
DOI:10.1080/10584587.2012.741449  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Sun, Hui;Xu, Tingting;Su, Jie;Ju, Changcheng;
7:1:65:17     Structure and ferroelectric properties of stoichiometric and Sr-deficient-SrBi4Ti4O15 thin films
DOI:10.1007/s10853-010-4965-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:3  AU: Sun, Hui;Chen, Xiao-bing;
7:1:65:18     Structural and Electrical Properties of Complex Tungsten Bronze Ferroelectrics; Li2Pb2La2W2Ti4V4O30
DOI:10.1080/00150193.2014.932188  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Das, Piyush R.;Sutar, B. C.;Pati, B.;Choudhury, R. N. P.;
7:1:65:19     Nanocrystalline Pb(Zr0.52Ti0.48)O-3 Ferroelectric Ceramics: Mechanical and Electrical Properties
DOI:10.1155/2010/783043  JN:JOURNAL OF NANOMATERIALS  PY:2010
  TC:4  AU: Ramana, M. Venkata;Reddy, M. Penchal;Reddy, N. Ramamanohar;Kumar, K. V. Siva;Murthy, V. R. K.;Murty, B. S.;
7:1:65:20     A comparative study of structural and electrical properties of Ba0.8Pb0.2TiO3 nanocrystalline ceramics prepared by microwave and spark plasma sintering
DOI:10.1016/jmatchemphys.2013.08.023  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:6  AU: Mudinepalli, Venkata Ramana;Song, Shenhua;Li, Junqin;Murty, B. S.;
7:1:65:21     Analytical comparison of magnetic and electrical properties using modified Landau theory in bismuth ferrite: Effect of milling
DOI:10.1016/j.jmmm.2013.08.048  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:4  AU: Jha, Pardeep K.;Jha, Priyanka A.;Srivastava, Geetika;Jha, A. K.;Kotnala, R. K.;Dwivedi, R. K.;
7:1:65:22     Enhancement of Dielectric Properties by Optimization of Sintering Condition in Ba5SmTi3Nb7O30 Prepared by Mechanical Activation Process
DOI:10.1080/00150193.2011.594012  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Jha, A. K.;Ganguly, Prasun;
7:1:66:1     Unipolar poling-induced high switching speed and improved imprint behaviors for poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films
DOI:10.1063/1.4858035  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Hou, Ying;Lu, Zhaoyue;Pu, Tiansong;Zhang, Yuan;Meng, Xiangjian;Xu, Haisheng;
7:1:66:2     The improved imprint effect in poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films
DOI:10.1063/1.4766176  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Hou, Ying;Lu, Zhaoyue;Zhang, Yuan;Xu, Guoqiang;Xu, Haisheng;
7:1:66:3     Temperature dependence of imprint mechanism in poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films
DOI:10.1063/1.4868413  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Zhang, Xiuli;Du, Xiaoli;Hou, Ying;Lu, Zhaoyue;Xu, Haisheng;
7:1:66:4     Modeling of ferroelectric switching process in poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films with electroactive interlayer
DOI:10.1063/1.3677946  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Hou, Ying;Zhang, Xiuli;Zhang, Yuan;Xu, Guoqiang;Xu, Haisheng;
7:1:66:5     Fast switching protocol for ferroelectric random access memory based on poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films
DOI:10.1063/1.4792689  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Hou, Ying;Lu, Zhaoyue;Pu, Tiansong;Zhang, Yuan;Xu, Guoqiang;Xu, Haisheng;
7:1:66:6     The preparation and ferroelectric properties of defect-free ultrathin films of vinylidene fluoride oligomer
DOI:10.1063/1.3298463  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Xu, Haisheng;Li, Guobing;Zhang, Yanni;Zhang, Xiuli;Gu, Yingjun;Shen, Dong;Meng, XiangJian;
7:1:66:7     High-temperature ferroelectric behaviors of poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films with electroactive interlayers
DOI:10.1063/1.3699051  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Hou, Ying;Zhang, Xiuli;Zhang, Yuan;Xu, Guoqiang;Xu, Haisheng;
7:1:66:8     A high-K ferroelectric relaxor terpolymer as a gate dielectric for organic thin film transistors
DOI:10.1063/1.4773186  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Wu, Shan;Shao, Ming;Burlingame, Quinn;Chen, Xiangzhong;Lin, Minren;Xiao, Kai;Zhang, Q. M.;
7:1:66:9     The Role of Proton for the Effect of Interlayer on Ferroelectric Behavior of Poly(vinylidene fluoride-trifluoroethylene) Copolymer Ultrathin Films
DOI:10.1080/00150193.2011.542702  JN:FERROELECTRICS  PY:2011
  TC:9  AU: Xu, H. S.;Zhang, Y. N.;Zhang, X. L.;Ma, Y. P.;
7:1:66:10     Quantifying electronic charge trap states and the effect of imprint on ferroelectric poly(vinylidene fluoride-trifluoroethylene) thin films
DOI:10.1063/1.3427559  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Lew, Connie;Thompson, Michael O.;
7:1:66:11     Investigation of state retention in metal-ferroelectric-insulator-semiconductor structures based on Langmuir-Blodgett copolymer films
DOI:10.1063/1.3452331  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Reece, Timothy J.;Gerber, A.;Kohlstedt, H.;Ducharme, Stephen;
7:1:66:12     The effect of electroactive interlayer on the ferroelectric properties in poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films
DOI:10.1063/1.4757936  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Zhang, Xiuli;Hou, Ying;Zhang, Yuan;Lv, Zhaoyue;Xu, Guoqiang;Xu, Haisheng;
7:1:66:13     Rate dependant heat generation in single cycle of domain switching of lead zirconate titanate via in-situ spontaneous temperature measurement
DOI:10.1063/1.4811702  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Chen, Hao-Sen;Pei, Yong-Mao;Liu, Bin;Fang, Dai-Ning;
7:1:66:14     Polarization screening in polymer ferroelectric films: Uncommon bulk mechanism
DOI:10.1063/1.4754146  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Mikheev, E.;Stolichnov, I.;Tagantsev, A. K.;Setter, N.;
7:1:66:15     Large and temperature-independent piezoelectric response in Pb(Mg1/3Nb2/3)O-3-BaTiO3-PbTiO3
DOI:10.1063/1.4765347  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Huang, Lizhu;Li, Guorong;Fu, Desheng;Zeng, Jiangtao;Ruan, Wei;Zheng, Liaoying;Zeng, Huarong;
7:1:66:16     Temperature dependence of imprint mechanism in poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films (vol 104, 103505, 2014)
DOI:10.1063/1.4871078  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhang, Xiuli;Du, Xiaoli;Hou, Ying;Lu, Zhaoyue;Xu, Haisheng;
7:1:67:1     Effect of stoichiometry and milling processes in the synthesis and the piezoelectric properties of modified KNN nanoparticles by solid state reaction
DOI:10.1016/j.jeurceramsoc.2010.05.027  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:33  AU: Rubio-Marcos, F.;Romero, J. J.;Martin-Gonzalez, M. S.;Fernandez, J. F.;
7:1:67:2     Role of sintering time, crystalline phases and symmetry in the piezoelectric properties of lead-free KNN-modified ceramics
DOI:10.1016/j.matchemphys.2010.03.065  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:30  AU: Rubio-Marcos, F.;Marchet, P.;Merle-Mejean, T.;Fernandez, J. F.;
7:1:67:3     Structural, microstructural and electrical properties evolution of (K,Na,Li)(Nb,Ta,Sb)O-3 lead-free piezoceramics through NiO doping
DOI:10.1016/j.jeurceramsoc.2011.05.041  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:19  AU: Rubio-Marcos, F.;Marchet, P.;Romero, J. J.;Fernandez, J. F.;
7:1:67:4     Sol-gel derived (Li, Ta, Sb) modified sodium potassium niobate ceramics: Processing and piezoelectric properties
DOI:10.1016/j.jallcom.2010.09.134  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:10  AU: Wang, Hongqiang;Zuo, Ruzhong;Fu, Jian;Liu, Yi;
7:1:67:5     Phase structure and piezoelectric properties of Ca- and Ba-doped K1/2Na1/2NbO3 lead-free ceramics
DOI:10.1016/j.ceramint.2012.10.181  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Taub, J.;Ramajo, L.;Castro, M. S.;
7:1:67:6     Lead free (Li,Na,K)(Nb,Ta,Sb)O-3 piezoelectric ceramics: Influence of sintering atmosphere and ZrO2 doping on densification, microstructure and piezoelectric properties
DOI:10.1016/j.jeurceramsoc.2010.10.031  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Leveque, G.;Marchet, P.;Levassort, F.;Tran-Huu-Hue, L. P.;Duclere, J. R.;
7:1:67:7     Influence of B-site compositional homogeneity on properties of (K0.44Na0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O-3-based piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2014.02.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Ramajo, L.;Castro, M.;del Campo, A.;Fernandez, J. F.;Rubio-Marcos, F.;
7:1:67:8     Nano-powders of Na0.5K0.5NbO3 made by a sol-gel method
DOI:10.1007/s11051-009-9595-0  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2010
  TC:23  AU: Chowdhury, Anirban;Bould, Jonathan;Zhang, Yifan;James, Craig;Milne, Steven J.;
7:1:67:9     Effect of the temperature on the synthesis of (K,Na)NbO3-modified nanoparticles by a solid state reaction route
DOI:10.1007/s11051-009-9817-5  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2010
  TC:12  AU: Rubio-Marcos, F.;Romero, J. J.;Fernandez, J. F.;
7:1:67:10     PFM characterization of (K0.5Na0.5)(0.95)La-0.05(Nb0.9Ti0.05)O-2.9 ceramics lead free
DOI:10.1007/s00339-013-7562-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Durruthy-Rodriguez, M. D.;Gervacio-Arciniega, J. J.;Portelles, J.;Fuentes, J.;Perez, A.;Yanez-Limon, J. M.;Espinoza-Beltran, F. J.;Raymond, O.;Siqueiros, J. M.;
7:1:67:11     Densification behavior, microstructure, and electrical properties of sol-gel-derived niobium-doped (Bi0.5Na0.5)(0.94)Ba0.06TiO3 ceramics
DOI:10.1007/s10853-010-4413-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:10  AU: Wang, Hongqiang;Zuo, Ruzhong;Liu, Yi;Fu, Jian;
7:1:67:12     Structural and dielectric properties of La- and Ti-modified K0.5Na0.5NbO3 ceramics
DOI:10.1007/s00339-012-6793-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Fuentes, J.;Portelles, J.;Perez, A.;Durruthy-Rodriguez, M. D.;Ostos, C.;Raymond, O.;Heiras, J.;Cruz, M. P.;Siqueiros, J. M.;
7:1:67:13     Temperature stability and phase transition of Li-0.02(KxNa1-x)(0.98)NbO3 ceramics
DOI:10.1016/j.ceramint.2011.04.109  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Cho, Jeong-Ho;Choi, Yoo-Jung;Lee, Young-Jin;Jeong, Young-Hun;Chun, Myoung-Pyo;Nam, Joong-Hee;Kim, Byung-Ik;
7:1:68:1     Phase Diagram, Temperature Stability, and Electrical Properties of (0.85-x)Pb(Mg1/3Nb2/3)O3-0.10Pb(Fe1/2Nb1/2)O3-0.05PbZrO3-xPbTiO3 System
DOI:10.1111/j.1551-2916.2012.05315.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Luo, Nengneng;Li, Qiang;Xia, Zhiguo;Chu, Xiangcheng;
7:1:68:2     Structure, frequency dependent dielectric properties and domain configuration of PMN-PFN-PT single crystal
DOI:10.1016/j.jcrysgro.2013.12.017  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:0  AU: Luo, Nengneng;Li, Qiang;Yan, Qingfeng;Zhang, Yiling;Xia, Zhiguo;Chu, Xiangcheng;
7:1:68:3     Effect of Pb(Fe1/2Nb1/2)O-3 modification on dielectric and piezoelectric properties of Pb(Mg1/3Nb2/3)O-3-PbZr0.52Ti0.48O3 ceramics
DOI:10.1016/j.materresbull.2011.05.026  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:10  AU: Luo, Nengneng;Li, Qiang;Xia, Zhiguo;
7:1:68:4     Effect of Annealing Temperature on Dielectric Relaxation and Raman Scattering of 0.65Pb(Mg1/3Nb2/3)O-3-0.35PbTiO(3) System
DOI:10.1111/j.1551-2916.2010.03785.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Hou, Yudong;Wu, Ningning;Wang, Chao;Zhu, Mankang;Song, Xuemei;
7:1:68:5     Synthesis and characterization of Pb(Mg1/3Nb2/3)O-3-PbTiO3 relaxor ferroelectrics modified by Ba(Mg1/3Nb2/3)O-3
DOI:10.1016/j.ceramint.2013.06.028  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Gao, Jinghan;Li, Qiang;Luo, Nengneng;Yan, Qingfeng;Zhang, Yiling;Chu, Xiangcheng;
7:1:68:6     A lead-reduced ferrolectric solid solution with high curie temperature: BiScO3-Pb(Zn1/3Nb2/3)O-3-PbTiO3
DOI:10.1016/j.ceramint.2014.04.156  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Pang, Dongfang;Long, Xifa;Tailor, Hamel;
7:1:68:7     Influence of Pb(Al,Nb)O-3 substitution on the structure and electrical properties in Pb(Zn,Nb)O-3-Pb(Zr,Ti)O-3 solid solutions
DOI:10.1016/j.jallcom.2013.12.132  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Wei, L. L.;Liu, A. Y.;Jin, C. C.;Lin, F. T.;Wang, P.;Yao, Q. R.;Tian, C. Y.;Li, Y.;Tang, J.;Han, H. L.;Shi, W. Z.;Jing, C. B.;
7:1:68:8     MPB design and crystal growth of PMN-PT-PZ relaxor ferroelectrics
DOI:10.1016/j.jcrysgro.2010.10.208  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:9  AU: Li, Qiang;Zhang, Yiling;Xia, Zhiguo;Chu, Xiangcheng;
7:1:68:9     Structure and Piezoelectric Properties Near the Bismuth Scandium Oxide-Lead Zirconate-Lead Titanate Ternary Morphotropic Phase Boundary
DOI:10.1111/j.1551-2916.2010.04142.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Sehirlioglu, Alp;Sayir, Ali;Dynys, Fred;Nittala, Krishna;Jones, Jacob;
7:1:68:10     Preparation, structure, and electric properties of the Pb(Zn1/3Nb2/3)O-3-Pb(Yb1/2Nb1/2)O-3-PbTiO3 ternary ferroelectric system ceramics near the morphotropic phase boundary
DOI:10.1016/j.jeurceramsoc.2013.03.013  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Ai, Liaodong;Li, Xiuzhi;Wang, Zujian;Liu, Ying;He, Chao;Li, Tao;Chu, Tao;Pang, Dongfang;Tailor, Hamel;Long, Xifa;
7:1:68:11     Fabrication and properties of PYN-PMN-PZT quaternary piezoelectric ceramics for high-power, high-temperature applications
DOI:10.1016/j.matlet.2009.12.020  JN:MATERIALS LETTERS  PY:2010
  TC:8  AU: Chen, Haiyan;Fan, Chunhua;
7:1:68:12     Phase diagram and electrical properties of Pb(Yb1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 ternary ceramics
DOI:10.1016/j.materresbull.2012.10.019  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: He, Chao;Li, Xiuzhi;Wang, Zujian;Liu, Ying;Shen, Dongquan;Li, Tao;Long, Xifa;
7:1:68:13     Composition and temperature dependence of ferroelectric and pyroelectric properties of (1-x)[PMN-PT(65/35)]-xPZ (0 <= x <= 0.10) ceramics
DOI:10.1016/j.materresbull.2014.08.003  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Jiang, Tong;Li, Qiang;Yan, Qingfeng;Luo, Nengneng;Zhang, Yiling;Chu, Xiangcheng;
7:1:68:14     Optical and electro-optical properties of (Pb,La)TiO3 transparent ceramics
DOI:10.1016/j.optmat.2012.02.020  JN:OPTICAL MATERIALS  PY:2012
  TC:1  AU: Londono, Fernando A.;Eiras, Jose A.;Garcia, Ducinei;
7:1:69:1     Templated Grain Growth of << 001 >>-Textured 0.675Pb(Mg1/3Nb2/3)O-3-0.325PbTiO(3) Piezoelectric Ceramics for Magnetic Field Sensors
DOI:10.1111/j.1551-2916.2010.04298.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:15  AU: Yan, Yongke;Cho, Kyung-Hoon;Priya, Shashank;
7:1:69:2     Piezoelectric properties and temperature stability of Mn-doped Pb(Mg1/3Nb2/3)-PbZrO3-PbTiO3 textured ceramics
DOI:10.1063/1.3698157  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Yan, Yongke;Cho, Kyung-Hoon;Priya, Shashank;
7:1:69:3     Processing, texture quality, and piezoelectric properties of < 001 >(C) textured (1-x)Pb(Mg1/3Nb2/3)TiO3-xPbTiO(3) ceramics
DOI:10.1063/1.3603045  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Poterala, Stephen F.;Trolier-McKinstry, Susan;Meyer, Richard J., Jr.;Messing, Gary L.;
7:1:69:4     Electromechanical behavior of [001]-textured Pb(Mg1/3Nb2/3)O-3-PbTiO3 ceramics
DOI:10.1063/1.4712563  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Yan, Yongke;Wang, Yu U.;Priya, Shashank;
7:1:69:5     Giant energy density in [001]-textured Pb(Mg1/3Nb2/3)O-3-PbZrO3-PbTiO3 piezoelectric ceramics
DOI:10.1063/1.4789854  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Yan, Yongke;Cho, Kyung-Hoon;Maurya, Deepam;Kumar, Amit;Kalinin, Sergei;Khachaturyan, Armen;Priya, Shashank;
7:1:69:6     Fundamental limitation to the magnitude of piezoelectric response of < 001 >(pc) textured K0.5Na0.5NbO3 ceramic
DOI:10.1063/1.4874648  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Gupta, Shashaank;Belianinov, Alexei;Okatan, Mahmut Baris;Jesse, Stephen;Kalinin, Sergei V.;Priya, Shashank;
7:1:69:7     Enhanced electromechanical coupling in Pb(Mg1/3Nb2/3)O-3-PbTiO3 < 001 >(C) radially textured cylinders
DOI:10.1063/1.4861224  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yan, Yongke;Zhou, Yuan;Priya, Shashank;
7:1:69:8     Combined Structural and Quantitative Texture Analysis of Morphotropic Phase Boundary Pb(Mg1/3Nb2/3)O-3-PbTiO3 Ceramics
DOI:10.1111/j.1551-2916.2012.05261.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Amorin, Harvey;Chateigner, Daniel;Holc, Janez;Kosec, Marija;Alguero, Miguel;Ricote, Jesus;
7:1:69:9     Pb(Mg1/3Nb2/3)O-3-PbTiO3 Textured Ceramics with High Piezoelectric Response by a Novel Templated Grain Growth Approach
DOI:10.1111/jace.12721  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Amorin, Harvey;Ursic, Hana;Ramos, Pablo;Holc, Janez;Moreno, Rodrigo;Chateigner, Daniel;Ricote, Jesus;Alguero, Miguel;
7:1:69:10     Fatigue mechanism of textured Pb(Mg1/3Nb2/3)O-3-PbTiO3 ceramics
DOI:10.1063/1.4819223  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Yan, Yongke;Zhou, Yuan;Gupta, Shashaank;Priya, Shashank;
7:1:69:11     Fabrication and properties of radially < 001 >(C) textured PMN-PT cylinders for transducer applications
DOI:10.1063/1.4730938  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Poterala, Stephen F.;Meyer, Richard J., Jr.;Messing, Gary L.;
7:1:70:1     Resistance degradation in donor-doped PZT ceramic stacks with Ag/Pd electrodes: I. Phenomenology of processes
DOI:10.1016/j.jeurceramsoc.2012.09.027  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Andrejs, L.;Fleig, J.;
7:1:70:2     Oxygen tracer diffusion in donor doped barium titanate
DOI:10.1063/1.3626054  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Froemling, T.;Hou, J.;Preis, W.;Sitte, W.;Hutter, H.;Fleig, J.;
7:1:70:3     Determination of electronic and ionic conductivity in mixed ionic conductors: HiTEC and in-situ impedance spectroscopy analysis-of isovalent and aliovalent doped BaTiO3
DOI:10.1016/j.ssi.2013.07.016  JN:SOLID STATE IONICS  PY:2013
  TC:2  AU: Lee, Soonil;Randall, Clive A.;
7:1:70:4     Oxide Ion Transport in Donor-Doped Pb(ZrxTi1-x)O-3: Near-Surface Diffusion Properties
DOI:10.1111/j.1551-2916.2012.05143.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Froemling, Till;Hutter, Herbert;Fleig, Juergen;
7:1:70:5     Electrical properties and structure of grain boundaries in n-conducting BaTiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2010.11.016  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Hou, Junbo;Zhang, Zaoli;Preis, Wolfgang;Sitte, Werner;Dehm, Gerhard;
7:1:70:6     Mixed conduction and chemical diffusion in a Pb(Zr-0.53,Ti-0.47)O-3 buried capacitor structure
DOI:10.1063/1.3302452  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Donnelly, Niall J.;Randall, Clive A.;
7:1:70:7     Kinetics of Oxygen Diffusion into Multilayer Ceramic Capacitors During the Re-oxidation Process and its Implications on Dielectric Properties
DOI:10.1111/j.1551-2916.2011.04623.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:12  AU: Kaneda, Kazumi;Lee, Soonil;Donnelly, Niall J.;Qu, Weiguo;Randall, Clive A.;Mizuno, Youichi;
7:1:70:8     Conductive AFM and chemical analysis of highly conductive paths in DC degraded PZT with Ag/Pd electrodes
DOI:10.1016/j.ssi.2013.04.020  JN:SOLID STATE IONICS  PY:2013
  TC:4  AU: Andrejs, L.;Ossmer, H.;Friedbacher, G.;Bernardi, J.;Limbeck, A.;Fleig, J.;
7:1:70:9     Pb loss in Pb(Zr,Ti)O(3) ceramics observed by in situ ionic conductivity measurements
DOI:10.1063/1.3585831  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Donnelly, Niall J.;Randall, Clive A.;
7:1:70:10     Oxygen vacancy redistribution in PbZrxTi1-xO3 (PZT) under the influence of an electric field
DOI:10.1016/j.ssi.2013.08.027  JN:SOLID STATE IONICS  PY:2014
  TC:3  AU: Holzlechner, G.;Kastner, D.;Slouka, C.;Flutter, H.;Fleig, J.;
7:1:70:11     Piezoelectric properties and conductivity of Pb(Zr,Ti)O-3 with SrO-WO3 additive
DOI:10.1007/s10853-009-4105-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:5  AU: Reichmann, Klaus;Voelkl, Elmar;Ahrens, Martin;Fleig, Juergen;Voetsch, Juergen;
7:1:70:12     Near-surface transport properties of donor doped Pb(ZrxTi1 (-) (x))O-3 (PZT) in an external electric field
DOI:10.1016/j.ssi.2012.01.038  JN:SOLID STATE IONICS  PY:2012
  TC:1  AU: Froemling, T.;Hutter, H.;Leach, C.;Ali, N. K.;Reichmann, K.;Fleig, J.;
7:1:70:13     Strongly enhanced incorporation of oxygen into barium titanate based multilayer ceramic capacitors using water vapor
DOI:10.1063/1.3460156  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Kessel, M.;De Souza, R. A.;Yoo, H-I;Martin, M.;
7:1:70:14     Modeling of electrical properties of grain boundaries in n-conducting barium titanate ceramics as a function of temperature and dc-bias
DOI:10.1016/j.ssi.2013.10.062  JN:SOLID STATE IONICS  PY:2014
  TC:3  AU: Preis, Wolfgang;Sitte, Werner;
7:1:70:15     Electrical transport properties of transparent PLZT ceramics: Bulk and grain boundaries
DOI:10.1016/j.ssi.2011.12.001  JN:SOLID STATE IONICS  PY:2012
  TC:1  AU: Cui, Z. H.;Gregori, G.;Ding, A. L.;Guo, X. X.;Maier, J.;
7:1:70:16     Oxide Ion Transport in Donor-Doped Pb(ZrxTi1-x)O-3: The Role of Grain Boundaries
DOI:10.1111/j.1551-2916.2010.04158.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Froemling, Till;Schintlmeister, Arno;Hutter, Herbert;Fleig, Juergen;
7:1:70:17     Resistance degradation in donor-doped PZT ceramic stacks with Ag/Pd electrodes: II. Distribution of conduction paths
DOI:10.1016/j.jeurceramsoc.2012.11.016  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Andrejs, L.;Ossmer, H.;Friedbacher, G.;Fleig, J.;
7:1:70:18     Semiconductivity in Acceptor-Doped BaTi1-xHoxO3-x/2-delta/2
DOI:10.1111/jace.12207  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Liu, Yang;West, Anthony R.;
7:1:71:1     A phase-field study on the hysteresis behaviors and domain patterns of nanocrystalline ferroelectric polycrystals
DOI:10.1063/1.4807315  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Liu, Ning;Su, Yu;Weng, George J.;
7:1:71:2     Effects of surface tension on the size-dependent ferroelectric characteristics of free-standing BaTiO3 nano-thin films
DOI:10.1063/1.3652906  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Su, Yu;Chen, Haitao;Li, Jacqueline J.;Soh, Ai Kah;Weng, George J.;
7:1:71:3     Surface potential at a ferroelectric grain due to asymmetric screening of depolarization fields
DOI:10.1063/1.4867984  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:6  AU: Genenko, Yuri A.;Hirsch, Ofer;Erhart, Paul;
7:1:71:4     Domain wall stability in ferroelectrics with space charges
DOI:10.1063/1.4866359  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Zuo, Yinan;Genenko, Yuri A.;Klein, Andreas;Stein, Peter;Xu, Baixiang;
7:1:71:5     Electric field-induced tetragonal to orthorhombic phase transitions in [110](c)-oriented BaTiO3 single crystals
DOI:10.1063/1.4769368  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Franzbach, D. J.;Gu, Y. J.;Chen, L. Q.;Webber, K. G.;
7:1:71:6     Size dependent domain configuration and electric field driven evolution in ultrathin ferroelectric films: A phase field investigation
DOI:10.1063/1.3298475  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:14  AU: Zhang, Yihui;Li, Jiangyu;Fang, Daining;
7:1:71:7     The effects of polarization dynamics and domain switching energies on field induced phase transformations of perovskite ferroelectrics
DOI:10.1063/1.3644957  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Franzbach, Daniel J.;Xu, Bai-Xiang;Mueller, Ralf;Webber, Kyle G.;
7:1:71:8     Charge compensation of head-to-head and tail-to-tail domain walls in barium titanate and its influence on conductivity
DOI:10.1063/1.4891259  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Zuo, Yinan;Genenko, Yuri A.;Xu, Bai-Xiang;
7:1:71:9     Effect of intrinsic surface stress on single-vertex structure of polarization in ferroelectric nanoparticles
DOI:10.1063/1.3409122  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Su, Yu;Du, Jing-Na;
7:1:71:10     Large electric field induced strains in ferroelectric islands
DOI:10.1063/1.3373915  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Zhang, J. X.;Sheng, G.;Chen, L. Q.;
7:1:71:11     Size Effect of Elastic and Electromechanical Properties of BaTiO3 Films from First-Principles Method
DOI:10.1080/10584587.2011.573723  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Hao, Feng;Hong, Jiawang;Fang, Daining;
7:1:71:12     Ferroelectric properties study for nanocgrain barium titanate ceramics
DOI:10.1016/j.tsf.2010.03.117  JN:THIN SOLID FILMS  PY:2010
  TC:2  AU: Deng, Xiangyun;Guan, Xiaofen;Chen, Ping;Lu, Chen;Tan, Zhongwen;Li, Dejun;Li, Jianbao;Wang, Xiaohui;Li, Longtu;
7:1:71:13     Critical Thickness and the Size-Dependent Curie Temperature of BaTiO3 Nanofilms
DOI:10.1166/jctn.2011.1766  JN:JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE  PY:2011
  TC:1  AU: Zhang, Yihui;Sang, Yongliang;Liu, Bin;Fang, Daining;
7:1:71:14     Surface potential at a ferroelectric grain due to asymmetric screening of depolarization fields (vol 115, 104102, 2014)
DOI:10.1063/1.4871013  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Genenko, Yuri A.;Hirsch, Ofer;Erhart, Paul;
7:1:72:1     Coupling and competition between ferroelectric and antiferroelectric states in Ca-doped Sr0.9-xBa0.1CaxTiO3: Multipolar states
DOI:10.1103/PhysRevB.83.052101  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Wei, T.;Liu, J. -M.;Zhou, Q. J.;Song, Q. G.;
7:1:72:2     Strong green light emission in Ho doped Bi4Ti3O12 ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.02.067  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Wei, T.;Zhou, Q. J.;Zhao, C. Z.;Lin, Y. B.;Zou, Y. L.;Li, Y.;Zhang, L. S.;
7:1:72:3     Competition between quantum fluctuation and ferroelectric order in Eu(1-x)Ba(x)TiO3
DOI:10.1016/j.apsusc.2012.01.037  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:8  AU: Wei, T.;Zhou, Q. J.;Yang, X.;Song, Q. G.;Li, Z. P.;Qi, X. L.;Liu, J. -M.;
7:1:72:4     Bright green emission in Ho doped Bi1/2Na1/2TiO3 ferroelectric ceramics
DOI:10.1016/j.matlet.2013.10.051  JN:MATERIALS LETTERS  PY:2014
  TC:6  AU: Wei, T.;Chang, Z.;Zhou, Q. J.;An, D. M.;Li, Z. P.;Sun, F. C.;
7:1:72:5     Synthesis of bright multicolor down and upconversion emitting Y2Te4O11:Er:Yb nanocrystals
DOI:10.1016/j.jallcom.2013.03.252  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Dwivedi, Y.;Mishra, Kavita;Rai, S. B.;
7:1:72:6     Upconversion photoluminescence and dielectric properties in Er3+ and Yb3+ co-doped Sr4La2Ti4Nb6O30
DOI:10.1016/j.matlet.2014.04.109  JN:MATERIALS LETTERS  PY:2014
  TC:4  AU: Wei, T.;Wang, Y. Q.;Zhao, C. Z.;Dong, X. X.;Wang, J. H.;
7:1:72:7     Enhanced ferroelectric and photoluminescence properties in Sr1-1.5xHoxBi2Nb2O9 ceramics
DOI:10.1016/j.materresbull.2013.07.001  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Wei, T.;Zhao, C. Z.;Li, C. P.;Zhan, L. Q.;Jin, Q.;Yang, X. F.;
7:1:72:8     Upconversion luminescence and ferroelectric properties of Er3+ doped Bi4Ti3O12-SrBi4Ti4O15
DOI:10.1016/j.matlet.2013.12.054  JN:MATERIALS LETTERS  PY:2014
  TC:8  AU: Wei, T.;Li, C. P.;Zhou, Q. J.;Zou, Y. L.;Zhang, L. S.;
7:1:72:9     Photoluminescence and ferroelectric properties in Eu doped Bi4Ti3O12-SrBi4Ti4O15 intergrowth ferroelectric ceramics
DOI:10.1016/j.jallcom.2013.06.186  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:9  AU: Wei, T.;Zhao, C. Z.;Li, C. P.;Lin, Y. B.;Yang, X.;Tan, H. G.;
7:1:72:10     Photoluminescence and structural properties of Ca3Y(VO4)(3): RE3+ (=Sm3+, Ho3+ and Tm3+) powder phosphors for tri-colors
DOI:10.1016/j.jcrysgro.2011.01.075  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:25  AU: Bandi, Vengala Rao;Grandhe, Bhaskar Kumar;Jayasimhadri, M.;Jang, Kiwan;Lee, Ho-Sueb;Yi, Soung-Soo;Jeong, Jung-Hyun;
7:1:72:11     Improved ferroelectric and fatigue properties in Zr doped Bi4Ti3O12 thin films
DOI:10.1016/j.matlet.2014.07.182  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Chen, Jieyu;Yun, Qi;Gao, Wei;Bai, Yulong;Nie, Chenghong;Zhao, Shifeng;
7:1:72:12     Bright green upconversion emission and enhanced ferroelectric polarization in Sr1-1.5xErxBi2Nb2O9
DOI:10.1016/j.optmat.2014.03.001  JN:OPTICAL MATERIALS  PY:2014
  TC:6  AU: Wei, T.;Zhao, C. Z.;Zhou, Q. J.;Li, Z. P.;Wang, Y. Q.;Zhang, L. S.;
7:1:73:1     Broadband gigahertz dynamics of relaxor ferroelectric Pb(Sc1/2Nb1/2)O-3-xPbTiO(3) single crystal probed by Brillouin scattering
DOI:10.1063/1.3581025  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Kojima, S.;Tsukada, S.;Hidaka, Y.;Bokov, A. A.;Ye, Z. -G.;
7:1:73:2     Crossover in the mechanism of ferroelectric phase transition of Pb[(Mg1/3Nb2/3)(1-x)Ti-x]O-3 single crystals studied by Brillouin light scattering
DOI:10.1103/PhysRevB.82.104110  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Ko, Jae-Hyeon;Kim, Do Han;Tsukada, Shinya;Kojima, Seiji;Bokov, Alexei A.;Ye, Zuo-Guang;
7:1:73:3     Micro-Brillouin Scattering of Relaxor Ferroelectrics with Perovskite Structure
DOI:10.1080/00150193.2010.482885  JN:FERROELECTRICS  PY:2010
  TC:13  AU: Kojima, Seiji;Tsukada, Shinya;
7:1:73:4     Role of dynamic polar nanoregions in heterovalent perovskite relaxor: Inelastic light scattering study of ferroelectric Ti rich Pb(Zn1/3Nb2/3)O-3-PbTiO3
DOI:10.1063/1.4768278  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Islam, Md. Saidul;Tsukada, Shinya;Chen, Wenzhi;Ye, Zuo-Guang;Kojima, Seiji;
7:1:73:5     Order-disorder behavior of ferroelectric phase transition of KTa1-xNbxO3 probed by Brillouin scattering
DOI:10.1063/1.3560345  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Ohta, Ryu;Zushi, Junta;Ariizumi, Takuma;Kojima, Seiji;
7:1:73:6     High-resolution Brillouin scattering studies of phase transitions and precursor phenomena in PbZr0.78Sn0.22O3 single crystals
DOI:10.1016/j.jallcom.2013.10.212  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Maczka, Miroslaw;Kim, Tae Hyun;Ptak, Maciej;Jankowska-Sumara, Irena;Majchrowski, Andrzej;Kojima, Seiji;
7:1:73:7     Pressure effects on relaxor ferroelectricity in disordered Pb(Sc1/2Nb1/2)O-3
DOI:10.1063/1.3369278  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Ahart, Muhtar;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Samara, George A.;Bing, Yonghong;Ye, Zuo-Guang;Kojima, Seiji;
7:1:73:8     Relaxor-like dynamics of ferroelectric K(Ta1-xNbx)O-3 crystals probed by inelastic light scattering
DOI:10.1063/1.4893363  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Rahaman, M. M.;Imai, T.;Miyazu, J.;Kobayashi, J.;Tsukada, S.;Helal, M. A.;Kojima, S.;
7:1:73:9     Anomalous behavior of acoustic phonon mode and central peak in Pb(Zn1/3Nb2/3)(0.85)Ti0.15O3 single crystal studied using Brillouin scattering
DOI:10.1063/1.4768441  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Mishra, K. K.;Sivasubramanian, V.;Arora, A. K.;Pradhan, Dillip;
7:1:73:10     Micro-Brillouin Scattering of Normal and Relaxor Ferroelectrics
DOI:10.1080/00150193.2011.577282  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Kojima, Seiji;
7:1:73:11     Brillouin spectroscopic study of central peak in NaNbO3 single crystal
DOI:10.1016/j.jallcom.2012.10.135  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Mishra, K. K.;Sivasubramanian, V.;Arora, A. K.;Sarguna, R. M.;
7:1:73:12     Evolution of polar order in (1-x)Pb(In1/2Nb1/2)O-3-xPbTiO(3) (0 <= x <= 1) system as investigated by dielectric and Raman spectroscopy
DOI:10.1063/1.4791572  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Ramesh, G.;Subramanian, V.;Sivasubramanian, V.;
7:1:73:13     Raman and Brillouin Scattering Study of Lead-Free Ferroelectric (1-x)(Na0.5Bi0.5) TiO3-xBaTiO(3) Single Crystals
DOI:10.1080/00150193.2011.542696  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Onda, Yosuke;Tsukada, Shinya;Kojima, Seiji;
7:1:73:14     Study of Dielectric Properties and Phase Transformation of Thermally Modified Nano-Composite PbIn1/2Nb1/2O3
DOI:10.1080/00150193.2012.671106  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Kania, A.;Waclawczyk, K.;Miga, S.;Kugel, G. E.;
7:1:73:15     Strain Relaxation at Nanometer Scale in Partially Disordered Pb(Sc1/2Ta1/2)O-3 Crystals
DOI:10.1080/00150193.2011.594318  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Kojima, S.;Sivasubramanian, V.;
7:1:73:16     Elastic Anomalies and Diffuse Phase Transitions of (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 Single Crystals Studied by Brillouin Scattering Spectroscopy
DOI:10.1080/00150193.2010.482893  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Onda, Y.;Tsukada, S.;Hidaka, Y.;Kojima, S.;
7:1:74:1     Effect of BiAlO3 modification on the stability of antiferroelectric phase in PbZrO3 ceramics prepared by conventional solid state reaction
DOI:10.1016/j.jallcom.2010.10.206  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:14  AU: Vittayakorn, Naratip;Boonchom, Banjong;
7:1:74:2     The phase evolution with temperature in 0.94PbZrO(3)-0.06Pb(Mg1/2W1/2)O-3 antiferroelectric ceramic
DOI:10.1016/j.jallcom.2010.06.197  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Charoonsuk, Piyanut;Wirunchit, Supamas;Muanghlua, Rangson;Niemcharoen, Surasak;Boonchom, Banjong;Vittayakorn, Naratip;
7:1:74:3     Phase Transition Behavior of the (1-x)PbZrO3-xBa(Al1/2Nb1/2)O3 Solid Solution
DOI:10.1111/j.1551-2916.2012.05277.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Sukkha, Usa;Vittayakorn, Wanwilai;Muanghlua, Rangson;Niemcharoen, Surasak;Boonchom, Banjong;Vittayakorn, Naratip;
7:1:74:4     Phase transition behavior of Ba(Mg1/3Nb2/3)O-3 modified PbZrO3 solid solution
DOI:10.1039/c3tc32353f  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:1  AU: Sukkha, Usa;Vittayakorn, Naratip;Guo, Ruyan;Bhalla, Amar S.;
7:1:74:5     Preparation and dielectric properties of compositionally graded lead barium zirconate thin films
DOI:10.1016/j.jallcom.2010.04.104  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Hao, Xihong;Zhang, Zhiqing;Zhou, Jing;An, Shengli;Zhai, Jiwei;
7:1:74:6     Antiferroelectric-ferroelectric phase transition in lead zinc niobate modified lead zirconate ceramics: crystal studies, microstructure, thermal and electrical properties
DOI:10.1007/s00339-010-5871-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:7  AU: Sukkha, Usa;Muanghlua, Rangson;Niemcharoen, Surasak;Boonchom, Banjong;Vittayakorn, Naratip;
7:1:74:7     Synthesis and phase evolution of electrospun antiferroelectric lead zirconate (PbZrO3) nanofibers
DOI:10.1016/j.mseb.2012.05.003  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:3  AU: Nawanil, Chanisa;Boomchom, Banjong;Prachayawarakorn, Jutarat;Vittayakorn, Wanwilai C.;Vittayakorn, Naratip;
7:1:74:8     Influence of Pb(In1/2Nb1/2)O-3 on the Phase Transitions, Electrical, and Thermal Properties of a PbZrO3 Ceramic
DOI:10.1111/j.1551-2916.2011.04511.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Sukkha, Usa;Muanghlua, Rangson;Niemcharoen, Surasak;Boonchom, Banjong;Vittayakorn, Naratip;
7:1:74:9     Effect of A-site and B-site ion replaced with small ions on the intermediate phase in PbZrO3 ceramic
DOI:10.1016/j.matchemphys.2013.12.010  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:1  AU: Sukkha, Usa;Vittayakorn, Wanwilai;Muanghlua, Rangson;Niemcharoen, Surasak;Vittayakorn, Naratip;
7:1:74:10     Effect of Pb(Y1/2Nb1/2)O-3 Additions on Thermal and Electrical Properties of PbZrO3 Ceramics
DOI:10.1080/00150193.2011.577656  JN:FERROELECTRICS  PY:2011
  TC:4  AU: Sukkha, Usa;Muanghlua, Rangson;Niemcharoen, Surasak;Boonchom, Banjong;Vittayakorn, Naratip;
7:1:74:11     Effect of Pb(Ni1/2W1/2)O-3 on the Phase Transition Behavior of PbZrO3 Ceramic
DOI:10.1080/00150193.2013.838902  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Sukkha, Usa;Vittayakorn, Wanwilai;Muanghlua, Rangson;Niemcharoen, Surasak;Karbkaew, Amornthep;Seeharaj, Panpailin;Vittayakorn, Naratip;
7:1:74:12     Effect of Pb (Yb1/2Nb1/2)O-3 on phase transition and thermal and electrical properties of PZ-PYbN solid solution on PZ-rich side
DOI:10.1007/s10853-011-5929-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:1  AU: Sukkha, Usa;Muanghlua, Rangson;Niemcharoen, Surasak;Boonchom, Banjong;Vittayakorn, Wanwilai;Vittayakorn, Naratip;
7:1:74:13     Effect of Chemical Treatment on Phase Transition of Lead Zirconate Nanofibers
DOI:10.1080/00150193.2013.838486  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Nawanil, Chanisa;Rerkratn, Apinai;Seeharaj, Panpailin;Vittayakorn, Naratip;
7:1:74:14     Characterization and Dielectric Properties of Nanocomposite Made of Lead Zirconate Nanofibers and Polyvinylidene Fluoride Improved with Carbon Nanotubes
DOI:10.1080/10584587.2013.852904  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Nawanil, Chanisa;Rerkratn, Apinai;Seeharaj, Panpailin;Vittayakorn, Naratip;
7:1:75:1     Synthesis and characterizations of KNN ferroelectric ceramics near 50/50 MPB
DOI:10.1016/j.ceramint.2012.05.093  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:20  AU: Kumar, P.;Pattanaik, M.;Sonia;
7:1:75:2     Enhanced d(33) value of Bi0.5Na0.5TiO3-(Ba0.85Ca0.15)(Ti0.90Zr0.10)O-3 lead-free ceramics
DOI:10.1016/j.jallcom.2011.12.145  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:14  AU: Gou, Qian;Wu, Jiagang;Li, Anqi;Wu, Bo;Xiao, Dingquan;Zhu, Jianguo;
7:1:75:3     Effect of Ba0.85Ca0.15Ti0.90Zr0.10O3 content on the microstructure and electrical properties of Bi-0.51(Na0.82K0.18) 0.50TiO3 ceramics
DOI:10.1016/j.ceramint.2012.02.074  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:11  AU: Qiao, Sha;Wu, Jiagang;Wu, Bo;Zhang, Binyu;Xiao, Dingquan;Zhu, Jianguo;
7:1:75:4     Microstructure and electrical properties of (Na0.5K0.5)(1-2x)MgxNbO3-Bi0.5Na0.5TiO3 lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2013.10.042  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Liang, Shuang;Zhu, Jiliang;Zheng, Maomei;Zhang, Pengyu;Sun, Ping;Wang, Zhongxing;Zhu, Xiaohong;
7:1:75:5     Microstructure and Electrical Properties of K0.5Na0.5NbO3-LiSbO3-BiFeO3-x %molZnO Lead-Free Piezoelectric Ceramics
DOI:10.1007/s11664-013-2875-6  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:1  AU: Zhao, Xiayan;Wang, Hua;Xu, Jiwen;Yuan, Changlai;Zhai, Xia;Cui, Yerang;
7:1:75:6     Investigation of a new lead-free (0.89-x)(Bi0.5Na0.5)TiO3-0.11(Bi0.5K0.5) TiO3-xBa(0.85)Ca(0.15)Ti(0.90)Zr(0.10)O(3) ceramics
DOI:10.1016/j.materresbull.2012.07.039  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Wu, Bo;Han, Chao;Xiao, Dingquan;Wang, Zhuo;Zhu, Jianguo;Wu, Jiagang;
7:1:75:7     Dielectric and Piezoelectric Properties of Lead Free (1-x) [(Bi0.5Na0.5)TiO3]-x[Ba(Zr0.2Ti0.8)O-3-(Ba0.7Ca0.3)TiO3] Ceramics
DOI:10.1080/10584587.2013.849561  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Sahoo, Ganesh K.;Mazumder, Ranabrata;
7:1:75:8     Microstructure and electric properties of lead-free 0.8Bi(1/2)Na(1/2)TiO(3)-0.2Bi(1/2)K(1/2)TiO(3) ceramics
DOI:10.1016/j.ceramint.2011.09.061  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:9  AU: Ji, Wei-Jing;Chen, Yan-Bin;Zhang, Shan-Tao;Yang, Bin;Zhao, Xiao-Ning;Wang, Qian-Jin;
7:1:75:9     Fabrication and properties of Na0.9K0.1NbO3 nanostructures by molten salt synthesis
DOI:10.1016/j.powtec.2013.05.013  JN:POWDER TECHNOLOGY  PY:2013
  TC:2  AU: Ge, Haiyan;Hou, Yudong;Yang, Jianfeng;Zhu, Mankang;Wang, Hao;Yan, Hui;
7:1:75:10     Microstructure and electrical properties of relaxor (1-x)[(K0.5Na0.5)(0.95)Li-0.05](Nb0.95Sb0.05)O-3-xBaTiO(3) piezoelectric ceramics
DOI:10.1016/j.ceramint.2011.10.079  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Wu, Wenjuan;Xiao, Dingquan;Wu, Jiagang;Li, Jing;Zhu, Jianguo;Zhang, Bin;
7:1:75:11     Phase structures and electrical properties of (1-x)(K0.48Na0.52) NbO3-x(Ba0.85Ca0.15)(Zr0.1Ti0.9)O-3 lead-free ceramics
DOI:10.1016/j.ceramint.2012.10.162  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Hao, Jigong;Li, Wei;Bai, Wangfeng;Shen, Bo;Zhai, Jiwei;
7:1:76:1     Nanodomains in KNN- Based Lead- Free Piezoelectric ceramics: Origin of Strong Piezoelectric Properties
DOI:10.1111/jace.12850  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Huan, Yu;Wang, Xiaohui;Shen, Zhengbo;Kim, Jingyong;Zhou, Huihua;Li, Longtu;
7:1:76:2     Low Temperature Sintering and Enhanced Piezoelectricity of Lead-Free (Na0.52K0.4425Li0.0375)(Nb0.86Ta0.06Sb0.08)O-3 Ceramics Prepared from Nano-Powders
DOI:10.1111/jace.12499  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Huan, Yu;Wang, Xiaohui;Guo, Limin;Li, Longtu;
7:1:76:3     Two-Step Sintering: An Approach to Broaden the Sintering Temperature Range of Alkaline Niobate-Based Lead-Free Piezoceramics
DOI:10.1111/j.1551-2916.2010.04085.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:27  AU: Fang, Jian;Wang, Xiaohui;Tian, Zhibin;Zhong, Caifu;Li, Longtu;Zuo, Ruzhong;
7:1:76:4     Phase Transition and High Piezoelectric Properties of Li-0.058(Na0.52+xK0.48)(0.942)NbO3 Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2010.04123.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Li, Hai-Tao;Zhang, Bo-Ping;Shang, Peng-Peng;Fan, Ye;Zhang, Qian;
7:1:76:5     Properties of Ultrafine-Grained Na0.5K0.5NbO3 Ceramics Prepared From Nanopowder
DOI:10.1111/j.1551-2916.2011.04534.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Fang, Jian;Wang, Xiaohui;Li, Longtu;
7:1:76:6     Ferroelectric domain morphology and structure in Li-doped (K,Na)NbO3 ceramics
DOI:10.1063/1.4746069  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Cho, Jeong Ho;Yeom, Na Ri;Kwon, So Jung;Lee, Young Jin;Jeong, Young Hun;Chun, Myoung Pyo;Nam, Joong Hee;Paik, Jong Hoo;Kim, Byung Ik;
7:1:76:7     The effect of pre-annealing on the microstructure of (K,Na)NbO3 ceramics
DOI:10.1016/j.ceramint.2012.09.003  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Moon, Sang Hwan;Choi, Jin Hong;Chae, Ki Woong;Kim, Jeog Seog;Cheon, Chae Il;
7:1:76:8     Displacement of Ta-O bonds near polymorphic phase transition in Li-, Ta-, and Sb-modified (K, Na) NbO3 ceramics
DOI:10.1063/1.4884381  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Huan, Yu;Wang, Xiaohui;Li, Longtu;
7:1:76:9     Theoretical Prediction and Experimental Validation of Enhancing the Piezoelectric Properties of (K, Na)NbO3 Modified by Li, Ta, and Sb According to the Linear Combination Rule
DOI:10.1111/jace.13131  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Huan, Yu;Wang, Xiaohui;Gao, Renlong;Li, Longtu;
7:1:76:10     Enhanced piezoelectric properties of (Na0.53K0.47)(Nb1-xTax)O-3 ceramics by Ta substitution
DOI:10.1016/j.ceramint.2011.04.106  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Sung, Y. S.;Lee, J. H.;Kim, S. W.;Lee, T. H.;Kim, J. M.;Cho, J. H.;Song, T. K.;Kim, M. H.;Park, T. G.;
7:1:76:11     Impedance Spectroscopy of Sodium Excess Ta-Modified (K0.5Na0.5)NbO3 Ceramics Prepared by Reactive Templated Grain Growth
DOI:10.1080/00150193.2014.893159  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Hussain, A.;Kim, J. S.;Rahman, J. U.;Maqbool, A.;Song, T. K.;Kim, W. J.;Kim, M. H.;
7:1:76:12     Controlling of the polymorphic phase transition on lead-free piezoelectric Li-0.08(Na0.52+xK0.48)(0.92)NbO3 ceramics
DOI:10.1016/j.ceramint.2012.11.041  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Zhao, Xiao-Kun;Zhang, Bo-Ping;Zhao, Lei;Zhu, Li-Feng;Zhou, Peng-Fei;Li, Yan;
7:1:76:13     Growth of (Na0.5K0.5)NbO3 single crystals by abnormal grain growth method from special shaped nano-powders
DOI:10.1016/j.jeurceramsoc.2010.01.008  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Wang, Chao;Hou, Yu-Dong;Ge, Hai-Yan;Zhu, Man-Kang;Yan, Hui;
7:1:76:14     Fine structural analysis and phase transition behavior for Li-modified Na0.5K0.5NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2011.04.110  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Kakimoto, Ken-ichi;Hotta, Tatsuro;Kagomiya, Isao;
7:1:76:15     Preparation and electrical properties of NaNbO3 ceramics synthesized by topochemical microcrystal conversion
DOI:10.1016/j.ceramint.2012.10.095  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Hussain, Ali;Kim, Jin-Soo;Ryu, Gyung-Hyun;Song, Tae-Kwon;Kim, Myong-Ho;Kim, Won-Jeong;
7:1:76:16     Determining the Stoichiometry of (K,Na)NbO3 Using Optimized Energy-Dispersive X-Ray Spectroscopy and Electron Energy-Loss Spectroscopy Analyses in a Transmission Electron Microscope
DOI:10.1111/j.1551-2916.2011.04389.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Sturm, Saso;Bencan, Andreja;Gulgun, Mehmet A.;Malic, Barbara;Kosec, Marija;
7:1:77:1     Influence of Mn doping on domain wall motion in Pb(Zr0.52Ti0.48)O-3 films
DOI:10.1063/1.3552298  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Zhu, Wanlin;Fujii, Ichiro;Ren, Wei;Trolier-McKinstry, Susan;
7:1:77:2     The effect of Mg doping on the dielectric and tunable properties of Pb0.3Sr0.7TiO3 thin films prepared by sol-gel method
DOI:10.1007/s00339-013-7645-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Sun, Xiaohua;Li, Xiuneng;Hou, Shuang;Huang, Caihua;Zou, Jun;Li, Meiya;Peng, Tianyou;Zhao, Xing-zhong;
7:1:77:3     Low Dielectric Loss and Good Dielectric Thermal Stability of xNd(Zn1/2Ti1/2)O-3(1-x)Ba0.6Sr0.4TiO3 Thin Films Fabricated by Sol-Gel Method
DOI:10.1111/jace.12112  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Sun, Xiaohua;Yang, Ying;Zhang, Qiaoling;Hou, Shuang;Huang, Caihua;Hu, Zongzhi;Zou, Jun;Li, Meiya;Peng, Tianyou;Zhao, Xing-Zhong;
7:1:77:4     Enhanced dielectric and tunable properties of barium strontium titanate thin films through introducing Nd(Zn1/2Ti1/2)O-3 and adjusting Ba/Sr
DOI:10.1007/s10853-013-7783-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:3  AU: Sun, Xiaohua;Yang, Ying;Zhang, Qiaoling;Zhou, Xin;Hu, Zongzhi;Huang, Caihua;
7:1:77:5     Dielectric and Percolative Properties of Ba0.5Sr0.5TiO3-Mg3B2O6 Composite Ceramics
DOI:10.1111/j.1551-2916.2010.04165.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Zhang, Qiwei;Zhai, Jiwei;Yao, Xi;
7:1:77:6     Improvement of dielectric thermal stability of BST ferroelectric material for tunable applications
DOI:10.1016/j.materresbull.2011.04.029  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:10  AU: Liu, Cheng;Liu, Peng;Yao, Guo-guang;Bian, Xiao-bing;Jing, Hui-xia;Lu, Xiao-gang;Gao, Chang-jie;
7:1:77:7     Defects control for improved electrical properties in (Ba0.8Sr0.2)(Zr0.2Ti0.8)O-3 films by Co acceptor doping
DOI:10.1063/1.3666021  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Miao, Jun;Chew, Khian Hooi;Jiang, Yong;
7:1:77:8     Epitaxial Pb(Zr-x,Ti1-x)O-3 (0.30 <= x <= 0.63) films on (100)MgO substrates for energy harvesting applications
DOI:10.1063/1.4754015  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Yeager, Charles B.;Trolier-McKinstry, Susan;
7:1:77:9     Effect of MgWO4 content on properties of Ba0.5Sr0.5TiO3 composite ceramics for tunable microwave applications
DOI:10.1016/j.materresbull.2011.02.046  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:6  AU: Zhang, Mingwei;Zhai, Jiwei;Zhang, Jingji;Jiang, Haitao;Yao, Xi;
7:1:77:10     Dependence of e(31,f) on polar axis texture for tetragonal Pb(Zr-x,Ti1-x)O-3 thin films
DOI:10.1063/1.4895339  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yeager, Charles B.;Ehara, Yoshitaka;Oshima, Naoya;Funakubo, Hiroshi;Trolier-McKinstry, Susan;
7:1:77:11     Electrical Properties of Cr Doped Pb0.5Sr0.5TiO3 Thin Films Prepared by Chemical Solution Deposition Method
DOI:10.1080/00150193.2010.484362  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Li, Ting;Liang, Tong;Wu, Guangheng;Qin, Ni;Bao, Dinghua;
7:1:77:12     Enhanced piezoelectric properties of (110)-oriented PbZr1-xTixO3 epitaxial thin films on silicon substrates at shifted morphotropic phase boundary
DOI:10.1063/1.4867477  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Wan, X.;Houwman, E. P.;Steenwelle, R.;van Schaijk, R.;Nguyen, M. D.;Dekkers, M.;Rijnders, G.;
7:1:78:1     Low-Temperature Sintering and Piezoelectric Properties of (Na0.5K0.5)NbO3 Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2009.03359.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:23  AU: Park, Hwi-Yeol;Seo, In-Tae;Choi, Jae-Hong;Nahm, Sahn;Lee, Hyeung-Gyu;
7:1:78:2     Small Reduction of the Piezoelectric d(33) Response in Potassium Sodium Niobate Thick Films
DOI:10.1111/jace.12797  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Pavlic, Jernej;Malic, Barbara;Rojac, Tadej;
7:1:78:3     Microstructural, structural, dielectric and piezoelectric properties of potassium sodium niobate thick films
DOI:10.1016/j.jeurceramsoc.2013.09.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Pavlic, Jernej;Malic, Barbara;Rojac, Tadej;
7:1:78:4     Electrical properties of Li doped sodium potassium niobate thick films prepared by a tape casting process
DOI:10.1016/j.jallcom.2011.04.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Fu, Fang;Shen, Bo;Zhai, Jiwei;Xu, Zhengkui;Yao, Xi;
7:1:78:5     Influence of Mn2+ on the electrical properties of textured KNN thick films
DOI:10.1016/j.ceramint.2011.04.103  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:12  AU: Fu, Fang;Shen, Bo;Zhai, Jiwei;Xu, Zhengkui;Yao, Xi;
7:1:78:6     Highly enhanced mechanical quality factor in lead-free (K0.5Na0.5)NbO3 piezoelectric ceramics by co-doping with K5.4Cu1.3Ta10O29 and CuO
DOI:10.1016/j.matlet.2010.04.031  JN:MATERIALS LETTERS  PY:2010
  TC:13  AU: Park, Beom Chul;Hong, In Ki;Jang, Hyun Deok;Tran, Vu Diem Ngoc;Tai, Weon Pil;Lee, Jae-Shin;
7:1:78:7     Large piezoelectric effect in lead-free Ba(Zr0.2Ti0.8)O-3-(Ba0.7Ca0.3)TiO3 films prepared by screen printing with solution infiltration process
DOI:10.1016/j.tsf.2012.11.066  JN:THIN SOLID FILMS  PY:2013
  TC:7  AU: Feng, Zuyong;Shi, Dongqi;Dou, Shixue;Tang, Xingui;Hu, Yihua;
7:1:78:8     Low temperature sintering of lead-free Bi-0.5(Na0.82K0.18)(0.5)TiO3 piezoelectric ceramics by co-doping with CuO and Nb2O5
DOI:10.1016/j.ceramint.2011.05.012  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Do, Nam Binh;Jang, Hyun Deok;Hong, Inki;Han, Hyoung Su;Le, Duc Thang;Tai, Weon Pil;Lee, Jae Shin;
7:1:78:9     Sintering Behaviour and Piezoelectric Properties of CuO-Added Lead-Free Bi(Na,K)TiO3 Ceramics
DOI:10.1080/00150193.2011.594733  JN:FERROELECTRICS  PY:2011
  TC:4  AU: Han, Hyoung-Su;Do, Nam-Binh;Ky-Nam Pham;Jang, Hyun-Deok;Vu Diem Ngoc Tran;Tai, Weon-Pil;Lee, Jae-Shin;
7:1:78:10     Piezoelectric properties of CuO-added (Na0.5K0.5)NbO3 ceramic multilayers
DOI:10.1016/j.jeurceramsoc.2011.11.020  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Seo, In-Tae;Kang, In-Young;Cha, You-Jeong;Choi, Jae-Hong;Nahm, Sahn;Sung, Tae-Hyun;Jung, Hyun-Chul;
7:1:78:11     Influence of sintering conditions on piezoelectric properties of KNbO3 ceramics
DOI:10.1016/j.jeurceramsoc.2014.06.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Kim, Dae-Hyeon;Joung, Mi-Ri;Seo, In-Tae;Hur, Joon;Kim, Jong-Hyun;Kim, Bo-Yun;Lee, Hwack-Joo;Nahm, Sahn;
7:1:78:12     Low-Temperature Sintering and Piezoelectric Properties of CuO-Added KNbO3 Ceramics
DOI:10.1111/jace.13225  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Kim, Dae-Hyeon;Joung, Mi-Ri;Seo, In-Tae;Hur, Joon;Kim, Jong-Hyun;Kim, Bo-Yun;Lee, Hwack-Joo;Nahm, Sahn;
7:1:78:13     Low Temperature Production of Lead-Free Piezoelectric Thick Films
DOI:10.1080/00150193.2011.594724  JN:FERROELECTRICS  PY:2011
  TC:5  AU: Lusiola, T.;Chelwani, N.;Bortolani, F.;Zhang, Q.;Dorey, R. A.;
7:1:79:1     Microstructure and dielectric properties of BaTiO3 ceramic doped with yttrium, magnesium, gallium and silicon for AC capacitor application
DOI:10.1016/j.materresbull.2014.09.023  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Wang, Min-Jia;Yang, Hui;Zhang, Qi-Long;Lin, Zhi-Sheng;Zhang, Zi-Shan;Yu, Dan;Hu, Liang;
7:1:79:2     Structural and relaxor behavior of (Ba1-xLax)(Ti0.85Sn0.15)O-3 ceramics obtained by solid state reaction
DOI:10.1016/j.jallcom.2009.12.148  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Singh, Sindhu;Singh, Prabhakar;Parkash, Om;Kumar, Devendra;
7:1:79:3     Novel X7R BaTiO3 ceramics co-doped with La3+ and Ca2+ ions
DOI:10.1016/j.jallcom.2013.10.055  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:7  AU: Lu, D. -Y.;Yue, Y.;Sun, X. -Y.;
7:1:79:4     Defects characterization of Dy-doped BaTiO3 ceramics via electron paramagnetic resonance
DOI:10.1016/j.jeurceramsoc.2014.02.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:7  AU: Lu, Da-Yong;Cui, Shu-Zhen;
7:1:79:5     Structural and dielectric properties, electron paramagnetic resonance, and defect chemistry of Pr-doped BaTiO3 ceramics
DOI:10.1016/j.jallcom.2014.06.067  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Lu, D-Y;Sun, X-Y;Liu, B.;Zhang, J-L;Ogata, T.;
7:1:79:6     Defect chemistry of a high-k 'Y5V' (Ba0.95Eu0.05)TiO3 ceramic
DOI:10.1016/j.ceramint.2013.01.063  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Lu, Da-Yong;Zhang, Li;Sun, Xiu-Yun;
7:1:79:7     Structural evolution and dielectric properties of (Ba1-xNdx)(Ti1-yFey)O-3 ceramics
DOI:10.1016/j.jallcom.2013.04.120  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Han, D-D;Lu, D-Y;Sun, X-Y;
7:1:79:8     Self-compensation characteristics of Eu ions in BaTiO3
DOI:10.1016/j.ssi.2011.07.021  JN:SOLID STATE IONICS  PY:2011
  TC:15  AU: Lu, Da-Yong;Ogata, Tateaki;Unuma, Hidero;Li, Xue-Cui;Li, Na-Na;Sun, Xiu-Yun;
7:1:79:9     Synthesis, structure and electrical studies of praseodymium doped barium zirconium titanate
DOI:10.1016/j.matchemphys.2013.03.009  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:5  AU: Sagar, Raghavendra;Madolappa, Shivanand;Sharanappa, Nagbasavanna;Raibagkar, R. L.;
7:1:79:10     In-situ diffuse phase transition at the Curie point of BaTiO3 induced by amphoteric Ce3+/Ce4+ ions
DOI:10.1016/j.ceramint.2013.04.057  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Lu, Da-Yong;Han, Dan-Dan;
7:1:79:11     Theoretical and experimental analysis for site preference of rare earth elements in BaTiO3
DOI:10.1016/j.ceramint.2011.04.041  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Umeda, Y.;Masuzawa, K.;Ueda, S.;Ootsuki, S.;Kuwabara, A.;Moriwake, H.;
7:1:79:12     Effect of Starting Materials on the Morphological and Optical Properties of Er Doped BaTiO3 Nanocrystalline Films
DOI:10.2320/matertrans.M2012313  JN:MATERIALS TRANSACTIONS  PY:2013
  TC:0  AU: Garcia-Hernandez, M.;Garcia-Murillo, A.;Carrillo-Romo, F. de J.;Morales-Ramirez, A. de J.;Meneses-Nava, M. A.;Gonzalez-Penguelly, B.;Garibay Febles, V.;
7:1:79:13     Large Dielectric Constant and Maxwell-Wagner Effects in BaTiO3/Cu Composites
DOI:10.1111/j.1551-2916.2011.04895.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Ning, Xu;Ping, Pu Yong;Zhuo, Wang;
7:1:79:14     Structural and optical properties of rare earth-doped (Ba0.77Ca0.23)(1-x)(Sm, Nd, Pr, Yb)(x)TiO3
DOI:10.1063/1.3594710  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Moraes, A. P. A.;Souza Filho, A. G.;Freire, P. T. C.;Mendes Filho, J.;M'Peko, J. C.;Hernandes, A. C.;Antonelli, E.;Blair, Michael W.;Muenchausen, Ross E.;Jacobsohn, Luiz G.;Paraguassu, W.;
7:1:79:15     The Effects of 3d Admixtures on Properties of Relaxor PLZT8/65/35 Ceramics
DOI:10.1080/10584587.2012.731279  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Kundzina, L.;Kundzins, M.;Kundzins, K.;Plaude, A.;Livinsh, M.;Antonova, M.;Dimza, V.;
7:1:80:1     Transparent Eu3+-Doped Ferroelectric Bismuth Titanate Glass-Ceramic Nanocomposites: Fabrication and Properties
DOI:10.1111/j.1551-2916.2012.05326.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Molla, Atiar Rahaman;Tarafder, Anal;Mukherjee, Siddhartha;Karmakar, Basudeb;
7:1:80:2     Synthesis and Characterization of Eu3+-Doped Transparent Glass- ceramics Containing Nanocrystalline (SrNbO3)-Nb-II-O-IV
DOI:10.1111/jace.12445  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Gangadharini, Upender;Molla, Atiar Rahaman;Tarafder, Anal;Karmakar, Basudeb;
7:1:80:3     Transparent Nd3+-doped bismuth titanate glass-ceramic nanocomposites: Fabrication and properties
DOI:10.1364/OME.4.000843  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:2  AU: Molla, A. R.;Tarafder, A.;Mukherjee, S.;Karmakar, B.;
7:1:80:4     Two dielectric relaxation mechanisms observed in lanthanum doped barium strontium titanate glass ceramics
DOI:10.1063/1.3581065  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Zhang, Yong;Ma, Tao;Wang, Xiangrong;Yuan, Zongbao;Zhang, Qian;
7:1:80:5     Crystallization behavior, microstructure and dielectric properties of lead titanate glass ceramics in the presence of Bi2O3 as a nucleating agent
DOI:10.1016/j.jeurceramsoc.2009.11.016  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:14  AU: Golezardi, S.;Marghussian, V. K.;Beitollahi, A.;Mirkazemi, S. M.;
7:1:80:6     Crystallization kinetics and dielectric properties of barium strontium titanate based glass-ceramics
DOI:10.1016/j.matchemphys.2010.01.015  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:16  AU: Chen, Jichun;Zhang, Yong;Deng, Changsheng;Dai, Xiaming;
7:1:80:7     Microstructure of Eu3+-Doped Perovskites-Type Niobate Ceramic La3Mg2NbO9
DOI:10.1111/jace.12656  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Qi, Shuyun;Wei, Donglei;Huang, Yanlin;Kim, Sun Il;Yu, Young Moon;Seo, Hyo Jin;
7:1:80:8     Synthesis and properties of glasses in the K2O-SiO2-Bi2O3-TiO2 system and bismuth titanate (Bi4Ti3O12) nano glass-ceramics thereof
DOI:10.1007/s10853-010-5173-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:8  AU: Molla, Atiar Rahaman;Tarafder, Anal;Karmakar, Basudeb;
7:1:80:9     Bulk crystallisation of (001) oriented fresnoite Sr2TiSi2O8 in glass-ceramics of the Sr-Ti-Si-K-B-O system
DOI:10.1016/j.jnoncrysol.2010.11.036  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2011
  TC:6  AU: Maury, N.;Cambier, F.;Gonon, M.;
7:1:80:10     Study of Ferroelectric Domain Structure of Barium Strontium Titanate Based Glass-Ceramics
DOI:10.1080/00150193.2013.778558  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Baturin, I. S.;Chezganov, D. S.;Neradovskiy, M. M.;Naumova, N. A.;Shur, V. Ya.;Zhang, Y.;Wang, X.;
7:1:80:11     Synthesis, structure and impedance spectroscopic analysis of [(Pb Sr-x(1-x))center dot OTiO2]-[(2SiO(2)center dot B2O3)]-7[BaO]-3[K2O] glass ceramic system doped with La2O3
DOI:10.1007/s10853-012-6602-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:4  AU: Gautam, C. R.;Singh, Prabhakar;Thakur, O. P.;Kumar, D.;Parkash, O.;
7:1:81:1     Intrinsically tunable 0.67BiFeO(3)-0.33BaTiO(3) thin film bulk acoustic wave resonators
DOI:10.1063/1.4769346  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Vorobiev, A.;Gevorgian, S.;Martirosyan, N.;Loffler, M.;Olsson, E.;
7:1:81:2     Tunable thin film bulk acoustic wave resonators with improved Q-factor
DOI:10.1063/1.3441413  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Vorobiev, A.;Gevorgian, S.;
7:1:81:3     Correlations between microstructure and Q-factor of tunable thin film bulk acoustic wave resonators
DOI:10.1063/1.3626939  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Vorobiev, A.;Gevorgian, S.;Loffler, M.;Olsson, E.;
7:1:81:4     Intrinsically switchable thin film bulk acoustic wave resonators
DOI:10.1063/1.4881141  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Vorobiev, A.;Gevorgian, S.;
7:1:81:5     Intrinsically tunable bulk acoustic wave resonators based on sol-gel grown PMN-PT films
DOI:10.1063/1.4893179  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Vorobiev, A.;Spreitzer, M.;Veber, A.;Suvorov, D.;Gevorgian, S.;
7:1:81:6     Effect of interface roughness on acoustic loss in tunable thin film bulk acoustic wave resonators
DOI:10.1063/1.3610513  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Vorobiev, A.;Berge, J.;Gevorgian, S.;Loffler, M.;Olsson, E.;
7:1:81:7     Improvement of barium strontium titanate solidly mounted resonator quality factor by reduction in electrode surface roughness
DOI:10.1063/1.3581204  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Saddik, George N.;Son, Junwoo;Stemmer, Susanne;York, Robert A.;
7:1:81:8     Effect of growth conditions on microstructure of BiFeO3-0.33BaTiO(3) films and performance of bulk acoustic wave resonators
DOI:10.1063/1.4866420  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Vorobiev, A.;Loffler, M.;Olsson, E.;Gevorgian, S.;
7:1:81:9     The field induced e(31,f) piezoelectric and Rayleigh response in barium strontium titanate thin films
DOI:10.1063/1.4897299  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Garten, L. M.;Trolier-McKinstry, S.;
7:1:81:10     Adhesion layer-bottom electrode interaction during BaxSr1-xTiO3 growth as a limiting factor for device performance
DOI:10.1063/1.4730781  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Loffler, Markus;Vorobiev, Andrei;Zeng, Lunjie;Gevorgian, Spartak;Olsson, Eva;
7:1:81:11     Ferroelectric film bulk acoustic wave resonators for liquid viscosity sensing
DOI:10.1063/1.4819327  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Vorobiev, A.;Gevorgian, S.;
7:1:81:12     Thin film bulk acoustic wave resonators tuning from first principles
DOI:10.1063/1.4807648  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Kvasov, Alexander;Tagantsev, Alexander K.;
7:1:81:13     Selective normal mode excitation in multilayer thin film bulk acoustic wave resonators
DOI:10.1063/1.4899067  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kozyrev, Andrey;Mikhailov, Anatoly;Ptashnik, Sergey;Petrov, Peter K.;Alford, Neil;
7:1:81:14     Microwave Response of BiFeO3 Films in Parallel-Plate Capacitors
DOI:10.1080/10584587.2012.665307  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Vorobiev, A.;Ahmed, T.;Gevorgian, S.;
7:1:81:15     A PMMA coated PMN-PT single crystal resonator for sensing chemical agents
DOI:10.1088/0964-1726/19/3/035015  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:4  AU: Frank, Michael;Moon, Kee S.;Kassegne, Sam;
7:1:82:1     Grain size effect on the dielectric nonlinearity of BaTiO3 ceramics
DOI:10.1063/1.3428423  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:20  AU: Fujii, Ichiro;Ugorek, Michael;Trolier-McKinstry, Susan;
7:1:82:2     Domain Wall Motion in A and B Site Donor-Doped Pb(Zr0.52Ti0.48)O-3 Films
DOI:10.1111/j.1551-2916.2012.05243.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:10  AU: Zhu, Wanlin;Fujii, Ichiro;Ren, Wei;Trolier-McKinstry, Susan;
7:1:82:3     Effect of Grain Size on Dielectric Nonlinearity in Model BaTiO3-Based Multilayer Ceramic Capacitors
DOI:10.1111/j.1551-2916.2010.04058.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Fujii, Ichiro;Trolier-McKinstry, Susan;Nies, Craig;
7:1:82:4     Effect of Ca incorporation on the dielectric nonlinear behavior of (Ba, Ca)TiO3 multi layer ceramic capacitors
DOI:10.1063/1.4904475  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yoon, Seok-Hyun;Park, Yunjung;Kim, Chang-Hoon;Kim, Doo-Young;
7:1:82:5     Effect of Oxygen Partial Pressure During Firing on the High AC Field Response of BaTiO3 Dielectrics
DOI:10.1111/j.1551-2916.2009.03514.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Fujii, Ichiro;Ugorek, Michael;Han, Yisong;Trolier-McKinstry, Susan;
7:1:82:6     Influence of excess Ba concentration on the dielectric nonlinearity in Mn and V-doped BaTiO3 multi layer ceramic capacitors
DOI:10.1063/1.4844575  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Yoon, Seok-Hyun;Kim, Sun-Jung;Kim, Sang-Hyuk;Kim, Doo-Young;
7:1:82:7     Preisach Modeling on Temperature Dependent Mean-Field Ising-Hysteresis
DOI:10.1080/00150193.2013.849177  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Monnor, Teerawat;Kanchiang, Kanokwan;Yimnirun, Rattikorn;Laosiritaworn, Yongyut;
7:1:82:8     Dielectric long time relaxation of domains walls in PbZrTiO3 thin films
DOI:10.1063/1.4866156  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Borderon, Caroline;Renoud, Raphael;Ragheb, Mostafa;Gundel, Hartmut W.;
7:1:82:9     Difference between compositional and grain size effect on the dielectric nonlinearity of Mn and V-doped BaTiO3 multilayer ceramic capacitors
DOI:10.1063/1.4885155  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Yoon, Seok-Hyun;Park, Jae-Sung;Kim, Chang-Hoon;Kim, Doo-Young;
7:1:82:10     Influence of Li doping on domain wall motion in Pb(Zr0.52Ti0.48)O-3 films
DOI:10.1007/s10853-014-8500-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:0  AU: Zhu, Wanlin;Fujii, Ichiro;Ren, Wei;Trolier-McKinstry, Susan;
7:1:82:11     Polarization Reversal in Relaxor PZN-PT Single Crystals
DOI:10.1080/00150193.2010.489841  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Shikhova, V. A.;Shur, V. Ya;Pelegov, D. V.;Rumyantsev, E. L.;Yakutova, O. V.;
7:1:82:12     Description of the low field nonlinear dielectric properties of ferroelectric and multiferroic materials
DOI:10.1063/1.3567777  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Borderon, C.;Renoud, R.;Ragheb, M.;Gundel, H. W.;
7:1:82:13     Effects of Ba/Ti ratio on tetragonality, Curie temperature, and dielectric properties of solid-state-reacted BaTiO3 powder
DOI:10.1557/jmr.2012.318  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:1  AU: Chang, Che-Yuan;Wang, Ru-Li;Huang, Chi-Yuen;
7:1:82:14     Double Loops Formation in Sr0.75Ba0.25Nb2O6 Single Crystals in Relaxor Phase
DOI:10.1080/00150193.2013.784178  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Shikhova, V. A.;Shur, V. Ya;Pelegov, D. V.;Ivleva, L. I.;
7:1:83:1     Defect dipoles and electrical properties of magnesium B-site substituted sodium potassium niobates
DOI:10.1016/j.jallcom.2014.04.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Li, Tangyuan;Fan, Huiqing;Long, Changbai;Dong, Guangzhi;Sun, Sheji;
7:1:83:2     Enhanced antiferroelectric and electric-induced pyroelectric properties of Mn-substitued (Pb0.832Ba0.138La0.02)(Zr0.7Ti0.05Sn0.25)O-3 ceramics
DOI:10.1063/1.4744948  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Zhang, Qingfeng;Fan, Maoyan;Jiang, Shenglin;Yang, Tongqing;Yao, Xi;
7:1:83:3     Enhanced pyroelectric properties of Ca-x(Sr0.5Ba0.5)(1-x)Nb2O6 lead-free ceramics
DOI:10.1063/1.4795795  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Zhang, Jing;Dong, Xianlin;Cao, Fei;Guo, Shaobo;Wang, Genshui;
7:1:83:4     Structures and temperature-dependent electrical properties in Ba0.8Sr0.2TiO3-BiAlO3 electrostrictive ceramics
DOI:10.1016/j.ceramint.2012.04.006  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Zhang, Chong;Jiao, Long;Kang, Huajun;Gu, Zheng-Bin;Yuan, Guo-Liang;Chen, Jun;Zhang, Shan-Tao;
7:1:83:5     Effect of Nd3+ substitution on electric field induced strain behavior in lead zirconate stannate titanate (68/22/10) ceramics
DOI:10.1016/j.jallcom.2013.08.199  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Zhang, Qingfeng;Yang, Tongqing;Zhang, Yangyang;Yao, Xi;
7:1:83:6     Effects of glass additions on high pyroelectric response of low-temperature sintered Pb0.87Ba0.1La0.02(Zr0.7Sn0.24Ti0.06)O-3 antiferroelectric ceramics
DOI:10.1016/j.materresbull.2012.11.106  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Zhang, Qingfeng;Chen, Shengchen;Zhang, Yangyang;Fan, Maoyan;Jiang, Shenglin;Yang, Tongqing;Wang, Jinfei;Li, Gang;Yao, Xi;
7:1:83:7     Large pyroelectric response in (Pb0.87La0.02Ba0.1)(Zr0.7Sn0.3-x Ti (x) )O-3 antiferroelectric ceramics under DC bias field
DOI:10.1007/s00339-010-6062-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:5  AU: Zhang, Qingfeng;Jiang, Shenglin;Zeng, Yike;Fan, Maoyan;Wang, Qingping;Zhang, Guangzu;Zhang, Yangyang;Yu, Yan;Wang, Jing;
7:1:83:8     High pyroelectric properties of (Pb0.87La0.02Ba0.1)(Zr0.75Sn0.25-xTix)O-3 ceramics near AFE/RFE phase boundary under DC bias field
DOI:10.1557/jmr.2011.133  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:3  AU: Zhang, Qingfeng;Jiang, Shenglin;
7:1:83:9     Large electric field-induced strain near AFE/FE phase boundary in (Pb0.97La0.02)(Zr, Sn, Ti)O-3 system
DOI:10.1007/s10853-013-7419-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:0  AU: Zhang, Q. F.;Yang, T. Q.;Wang, J. F.;
7:1:83:10     Enhanced pyroelectric property in (1-x)(Bi0.5Na0.5) TiO3-xBa(Zr0.055Ti0.945)O-3: Role of morphotropic phase boundary and ferroelectric-antiferroelectric phase transition
DOI:10.1063/1.4828675  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Guo, Feifei;Yang, Bin;Zhang, Shantao;Wu, Fengmin;Liu, Danqing;Hu, Pingan;Sun, Ye;Wang, Dali;Cao, Wenwu;
7:1:83:11     Influence of Sr/Ba ratio on the dielectric, ferroelectric and pyroelectric properties of strontium barium niobate ceramics
DOI:10.1016/j.ceramint.2012.08.048  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Zhang, Jing;Wang, Genshui;Gao, Feng;Mao, Chaoliang;Cao, Fei;Dong, Xianlin;
7:1:83:12     High pyroelectric response of low-temperature sintered Pb0.87Ba0.1La0.02 (Zr0.7Sn0.24Ti0.06)O-3 antiferroelectric ceramics
DOI:10.1016/j.jallcom.2012.10.011  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Zhang, Qingfeng;Fan, Maoyan;Jiang, Shenglin;Yang, Tongqing;Wang, Jinfei;Yao, Xi;
7:1:84:1     Piezoelectric properties and time stability of lead-free (Na0.52K0.44Li0.04)Nb1-x-ySbxTayO3 ceramics
DOI:10.1016/j.ceramint.2012.07.063  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Du, Juan;Yi, Xiu-Jie;Ban, Chao-Lei;Xu, Zhi-Jun;Zhao, Pan-Pan;Wang, Chun-Ming;
7:1:84:2     Advantages of Low Partial Pressure of Oxygen Processing of Alkali Niobate: NaNbO3
DOI:10.1111/jace.12815  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Shimizu, Hiroyuki;Kobayashi, Keisuke;Mizuno, Youichi;Randall, Clive A.;
7:1:84:3     Effects of CuO doping on the electrical properties of 0.98K(0.5)Na(0.5)NbO(3)-0.02BiScO(3) lead-free piezoelectric ceramics
DOI:10.1016/j.matlet.2010.12.058  JN:MATERIALS LETTERS  PY:2011
  TC:14  AU: Liu, Jing;Zhu, Jiliang;Li, Xuhai;Wang, Mingsong;Zhu, Xiaohong;Zhu, Jianguo;Xiao, Dingquan;
7:1:84:4     Low temperature fabrication of lead-free KNN-LS-BS ceramics via the combustion method
DOI:10.1016/j.ceramint.2012.10.102  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Wattanawikkam, Chakkaphan;Vittayakorn, Naratip;Bongkarn, Theerachai;
7:1:84:5     Piezoelectric and dielectric properties of K0.5Na0.5NbO3-LiSbO3-BiScO3 lead-free piezoceramics
DOI:10.1016/j.mseb.2010.10.007  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:4  AU: Jiang Minhong;Deng Manjiao;Lu Huaxin;Wang Shi;Liu Xinyu;
7:1:84:6     Dielectric and piezoelectric properties of cerium-doped (NaBi)(0.49)[](0.02)Bi2Nb1.98Ta0.02O9-based piezoceramics
DOI:10.1016/j.ceramint.2014.06.002  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Sun, Lingguang;Chen, Qiang;Wu, Jiagang;Peng, Zhihang;Tan, Zhi;Xiao, Dingquan;Zhu, Jianguo;
7:1:84:7     Phase Formation, Microstructure and Electrical Properties of KNN-BZT Ceramics Fabricated via Combustion Technique
DOI:10.1080/00150193.2013.850342  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kornphom, Chittakorn;Paowsawat, Saranporn;Bongkarn, Theerachai;
7:1:84:8     Hydrothermal synthesis and characterization of (1-x)K0.5Na0.5NbO3-xBi(0.5)Na(0.5)TiO(3) lead-free ceramics
DOI:10.1016/j.jallcom.2013.10.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Li, Shite;Yue, Yi;Ning, Xiaojie;Guo, Min;Zhang, Mei;
7:1:84:9     Influence of B-site non-stoichiometry on structure and electrical properties of KNLNS lead-free piezoelectric ceramics
DOI:10.1016/j.matlet.2012.02.021  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Zhao, Yongjie;Zhao, Yuzhen;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;
7:1:84:10     Effects of CuO on the Electrical Properties of CaTiO3-Modified [(Na0.52K0.48)(0.955)Li-0.045](Nb0.955Sb0.045)O-3 Lead-Free Piezoceramics
DOI:10.1111/j.1551-2916.2010.03895.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Huang, Xiaolei;Xiao, Dingquan;Li, Xuhai;Wu, Wenjuan;Liang, Wenfeng;Xie, Ruishi;Zhu, Jianguo;
7:1:84:11     Defect dipoles-driven ferroelectric behavior in potassium sodium niobate ceramics
DOI:10.1016/j.ceramint.2014.05.026  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Wu, Wenjuan;Li, Jing;Xiao, Dingquan;Chen, Min;Ding, Yingchun;Liu, Chuanqi;
7:1:84:12     Structure and Electrical Properties of (1-x)[(K0.5Na0.5)(0.95)Li-0.05](Nb0.95Sb0.05)O-3-xSrTiO(3) Lead-Free Piezoelectric Ceramics with Improved Temperature Stability
DOI:10.1080/10584587.2012.741892  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Zhu, Bo;Zhu, Jiliang;Liu, Jing;Li, Xuhai;Wang, Mingsong;Sun, Ping;Wang, Zhongxing;Zhu, Xiaohong;Zhu, Jianguo;Xiao, Dingquan;
7:1:84:13     Property-processing relations in developing thermoelectric ceramics: Na1-x Co2O4
DOI:10.1007/s10853-010-5039-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:5  AU: Yamakawa, Hiroo;Lee, Soonil;Takagi, Hiroshi;Randall, Clive A.;
7:1:84:14     The effects of sintering temperature and content of x on phase formation, microstructure and dielectric properties of (1-x)(Bi0.4871Na0.4871La0.0172TiO3)-x(BaZr(0.05)Ti(0.9)5O(3)) ceramics prepared via the combustion technique
DOI:10.1016/j.ceramint.2012.10.106  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Kornphom, Chittakorn;Laowanidwatana, Artid;Bongkarn, Theerachai;
7:1:84:15     Fabrication of 0.62[0.75PMN-0.25PYbN]-0.38PT Ceramics Using One Step Calcination via Combustion Technique
DOI:10.1080/00150193.2013.846639  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Kornphom, Chittakorn;Bhupaijit, Pamornnarumol;Vittayakorn, Naratip;Bongkarn, Theerachai;
7:1:84:16     Sintering Behavior of KNN-BNKT Lead-free Piezoelectric Ceramics
DOI:10.1080/00150193.2013.849978  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Huang, Tao;Xiao, Ding-Quan;Liang, Wen-Feng;Wu, Jia-Gang;Wang, Zhuo;Zhu, Jian-Guo;
7:1:85:1     Structure-property relationships in BaTiO3-BiFeO3-BiYbO3 ceramics
DOI:10.1016/j.jeurceramsoc.2013.01.011  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Schileo, Giorgio;Luisman, Luke;Feteira, Antonio;Deluca, Marco;Reichrnann, Klaus;
7:1:85:2     Average and Local Structure of (1-x)BaTiO3-xLaYO(3) (0 <= x <= 0.50) Ceramics
DOI:10.1111/j.1551-2916.2010.04006.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:17  AU: Feteira, Antonio;Sinclair, Derek C.;Kreisel, Jens;
7:1:85:3     Weak-relaxor behaviour in Bi/Yb-doped KNbO3 ceramics
DOI:10.1063/1.3660255  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Luisman, Luke;Feteira, Antonio;Reichmann, Klaus;
7:1:85:4     Use of Raman spectroscopy to determine the site occupancy of dopants in BaTiO3
DOI:10.1063/1.3592192  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:17  AU: Pokorny, J.;Pasha, U. M.;Ben, L.;Thakur, O. P.;Sinclair, D. C.;Reaney, I. M.;
7:1:85:5     Ferroelectric-to-Relaxor Crossover in (1-x)BaTiO3-xBiYbO(3) (0 <= x <= 0.08) Ceramics
DOI:10.1111/j.1551-2916.2011.04651.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:13  AU: Strathdee, Tamsin;Luisman, Luke;Feteira, Antonio;Reichmann, Klaus;
7:1:85:6     Structure and Dielectric Properties of BaTiO3-BiYO3 Perovskite Solid Solutions
DOI:10.1111/jace.12817  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Huang, Xuechen;Hao, Hua;Zhang, Shujun;Liu, Hanxing;Zhang, Wenqin;Xu, Qi;Cao, Minghe;
7:1:85:7     Dielectric properties and related ferroelectric domain configurations in multiferroic BiFeO3-BaTiO3 solid solutions
DOI:10.1016/j.ceramint.2011.05.022  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:9  AU: Hang, Qiming;Xing, Zhibiao;Zhu, Xinhua;Yu, Miao;Song, Ye;Zhu, Jianmin;Liu, Zhiguo;
7:1:85:8     Structure and dielectric properties of (1-x)Ag0.9Li0.1NbO3-(x)Bi0.5K0.5TiO3 ferroelectric ceramics
DOI:10.1016/j.ceramint.2014.02.094  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Pozingis, J.;Macutkevic, J.;Grigalaitis, R.;Banys, J.;Lupascu, D. C.;
7:1:85:9     Effects of average and local structure on the dielectric behavior of (1-x)BaTiO3-xLaYO(3) (0 <= x <= 0.40) ceramics
DOI:10.1063/1.3459897  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Feteira, A.;Sinclair, D. C.;Lanagan, M. T.;
7:1:85:10     Direct preparation of ultrafine BaTiO3 nanoparticles by chemical vapor synthesis
DOI:10.1007/s11051-014-2618-5  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2014
  TC:3  AU: Mojic-Lante, Bojana;Djenadic, Ruzica;Srdic, Vladimir V.;Hahn, Horst;
7:1:86:1     (K,Na)NbO3-Based Ceramics for Piezoelectric "Hard"Lead-Free Materials
DOI:10.1111/j.1551-2916.2009.03528.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:27  AU: Lim, Jong Bong;Zhang, Shujun;Jeon, Jae-Ho;Shrout, Thomas R.;
7:1:86:2     Ferroelectric Domain Structures and Electrical Properties of Fine-Grained Lead-Free Sodium Potassium Niobate Ceramics
DOI:10.1111/j.1551-2916.2011.04510.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:15  AU: Eriksson, Mirva;Yan, Haixue;Viola, Giuseppe;Ning, Huanpo;Gruner, Daniel;Nygren, Mats;Reece, Mike J.;Shen, Zhijian;
7:1:86:3     Exploring different sintering atmospheres to reduce nonlinear response of modified KNN piezoceramics
DOI:10.1016/j.jeurceramsoc.2012.09.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Vendrell, X.;Garcia, J. E.;Rubio-Marcos, F.;Ochoa, D. A.;Mestres, L.;Fernandez, J. F.;
7:1:86:4     Investigation of CuO-Doped NKN Ceramics with High Mechanical Quality Factor Synthesized by a B-Site Oxide Precursor Method
DOI:10.1111/j.1551-2916.2011.04903.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Yang, Song-Ling;Tsai, Cheng-Che;Liou, Yi-Cheng;Hong, Cheng-Shong;Li, Bing-Jing;Chu, Sheng-Yuan;
7:1:86:5     Comparison of sintering behavior and piezoelectric properties of (K,Na)NbO3-based ceramics sintered in conventional and microwave furnace
DOI:10.1016/j.matchemphys.2013.11.036  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Bafandeh, Mohammad Reza;Gharahkhani, Raziyeh;Lee, Jae-Shin;
7:1:86:6     Low-Temperature Sintering of Dense (Na,K)NbO3 Piezoelectric Ceramics Using the Citrate Precursor Technique
DOI:10.1111/j.1551-2916.2010.03748.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:21  AU: Kakimoto, Ken-ichi;Hayakawa, Yusuke;Kagomiya, Isao;
7:1:86:7     Low temperature consolidated lead-free ferroelectric niobate ceramics with improved electrical properties
DOI:10.1557/JMR.2010.0034  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:6  AU: Eriksson, Mirva;Yan, Haixue;Nygren, Mats;Reece, Mike J.;Shen, Zhijian;
7:1:86:8     Differences Between Copper-Oxide- and Zinc-Oxide-Doped Sodium Potassium Niobate Ceramics
DOI:10.1111/j.1551-2916.2012.05246.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Yang, Song-Ling;Tsai, Cheng-Che;Liou, Yi-Cheng;Hong, Cheng-Shong;Chen, Han-Chang;Chu, Sheng-Yuan;
7:1:86:9     Effect of K/Na ratio on piezoelectric properties of modified-(K1-xNax)NbO3 "Hard" lead-free piezoelectrics
DOI:10.1016/j.ceramint.2011.10.065  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Lim, Jong Bong;Jeong, Young-Hun;Kim, Myong-Ho;Suvorov, Danilo;Jeon, Jae-Ho;
7:1:86:10     Shear-Mode Piezoelectric Properties of Modified-(K,Na)NbO3 Ceramics for "Hard" Lead-Free Materials
DOI:10.1111/j.1551-2916.2010.03870.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Lim, Jong Bong;Zhang, Shujun;Lee, Hyeong Jae;Jeon, Jae-Ho;Shrout, Thomas R.;
7:1:86:11     Ferroelectric Bi(Na,K)TiO3-based materials for lead-free piezoelectrics
DOI:10.1016/j.ceramint.2011.05.011  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Lim, Jong Bong;Suvorov, Danilo;Jeon, Jae-Ho;
7:1:86:12     Effects of K Excess on the Preparation and Characterization of (K0.5Na0.5)NbO3 Ceramics
DOI:10.1080/00150193.2014.894449  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Zhang, Dongsheng;Zhang, Zheng;
7:1:86:13     Effects of modified-process on the microstructure, internal bias field, and activation energy in CuO-doped NKN ceramics
DOI:10.1016/j.jeurceramsoc.2011.12.008  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Yang, Song-Ling;Hong, Cheng-Shong;Tsai, Cheng-Che;Liou, Yi-Cheng;Chu, Sheng-Yuan;
7:1:87:1     Misfit strain dependence of ferroelectric and piezoelectric properties of clamped (001) epitaxial Pb(Zr-0.52, Ti-0.48)O-3 thin films
DOI:10.1063/1.3669527  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:19  AU: Nguyen, Minh D.;Dekkers, Matthijn;Houwman, Evert;Steenwelle, Ruud;Wan, Xin;Roelofs, Andreas;Schmitz-Kempen, Thorsten;Rijnders, Guus;
7:1:87:2     Stress-controlled Pb(Zr0.52Ti0.48)O-3 thick films by thermal expansion mismatch between substrate and Pb(Zr0.52Ti0.48)O-3 film
DOI:10.1063/1.3669384  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Han, Guifang;Ryu, Jungho;Yoon, Woon-Ha;Choi, Jong-Jin;Hahn, Byung-Dong;Kim, Jong-Woo;Park, Dong-Soo;Ahn, Cheol-Woo;Priya, Shashank;Jeong, Dae-Yong;
7:1:87:3     Epitaxial PZT films for MEMS printing applications
DOI:10.1557/mrs.2012.271  JN:MRS BULLETIN  PY:2012
  TC:8  AU: Funakubo, Hiroshi;Dekkers, Matthijn;Sambri, Alessia;Gariglio, Stefano;Shklyarevskiy, Igor;Rijnders, Guus;
7:1:87:4     Structural Modification and Large Piezoelectricity of Strained (Na, Bi) TiO3-BaTiO3 Epitaxial Thin Films
DOI:10.1111/j.1551-2916.2012.05331.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Tanaka, Yoshiaki;Harigai, Takakiyo;Ueda, Michihito;Adachi, Hideaki;Fujii, Eiji;
7:1:87:5     Piezoelectric MEMS for energy harvesting
DOI:10.1557/mrs.2012.275  JN:MRS BULLETIN  PY:2012
  TC:31  AU: Kim, Sang-Gook;Priya, Shashank;Kanno, Isaku;
7:1:87:6     Experimental evidence for orientation property of Pb(Zr0.35Ti0.65)O-3 by manipulating polar axis angle using CaF2 substrate
DOI:10.1063/1.3357421  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Utsugi, Satoru;Fujisawa, Takashi;Ehara, Yoshitaka;Yamada, Tomoaki;Matsushima, Masaaki;Morioka, Hitoshi;Funakubo, Hiroshi;
7:1:87:7     Strain-driven control of piezoelectricity in (Na,Bi)TiO3-BaTiO3 epitaxial thin films
DOI:10.1063/1.4804135  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Tanaka, Y.;Harigai, T.;Adachi, H.;Sakamoto, N.;Wakiya, N.;Suzuki, H.;Fujii, E.;
7:1:87:8     Effect of dopants on ferroelectric and piezoelectric properties of lead zirconate titanate thin films on Si substrates
DOI:10.1016/j.ceramint.2013.06.098  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Nguyen, Minh D.;Trinh, Thong Q.;Dekkers, Matthijn;Houwman, Evert P.;Vu, Hung N.;Rijnders, Guus;
7:1:87:9     2-2 Structured Magnetoelectric Composites by Aerosol Deposition
DOI:10.1111/j.1551-2916.2011.05050.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Oh, Nam-Kun;Han, Guifang;Yoon, Woon-Ha;Choi, Jong-Jin;Hahn, Byung-Dong;Kim, Jong-Woo;Ahn, Cheol-Woo;Choi, Joon Hwan;Park, Dong-Soo;Kim, Jeong-Joo;Ryu, Jungho;
7:1:87:10     Stress Modulation and Ferroelectric Properties of Nanograined PbTiO3 Thick Films on the Different Substrates Fabricated by Aerosol Deposition
DOI:10.1111/jace.13216  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Lee, Jungkeun;Lee, Soohwan;Choi, Min-Geun;Ryu, Jungho;Lee, Jong-Pil;Lim, Yun-Soo;Jeong, Dae-Yong;
7:1:87:11     Loycal atomic and electronic structures and ferroelectric properties of PbZr0.52Ti0.48O3: An x-ray absorption study
DOI:10.1063/1.3607475  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Ray, S. C.;Hsueh, H. C.;Wu, C. H.;Pao, C. W.;Asokan, K.;Liu, M. T.;Tsai, H. M.;Chuang, C. H.;Pong, W. F.;Chiou, J. W.;Tsai, M. -H.;Lee, J. M.;Jang, L. Y.;Chen, J. M.;Lee, J. F.;
7:1:87:12     Freestanding piezoelectric rings for high efficiency energy harvesting at low frequency
DOI:10.1063/1.3551725  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Massaro, Alessandro;De Guido, Stefano;Ingrosso, Ilaria;Cingolani, Roberto;De Vittorio, Massimo;Cori, Marco;Bertacchini, Alessandro;Larcher, Luca;Passaseo, Adriana;
7:1:87:13     Local atomic and electronic structures and ferroelectric properties of PbZr0.52Ti0.48O3: An x-ray absorption study (vol 99, 042909, 2011)
DOI:10.1063/1.3665119  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Ray, S. C.;Hsueh, H. C.;Wu, C. H.;Pao, C. W.;Asokan, K.;Liu, M. T.;Tsai, H. M.;Chuang, C. H.;Pong, W. F.;Chiou, J. W.;Tsai, M. -H.;Lee, J. M.;Jang, L. Y.;Chen, J. M.;Lee, J. F.;
7:1:87:14     The extraordinary role of the AlN interlayer in growth of AlN sputtered on Ti electrodes
DOI:10.1063/1.4835035  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Tran, A. T.;Pandraud, G.;Tichelaar, F. D.;Nguyen, M. D.;Schellevis, H.;Sarro, P. M.;
7:1:88:1     Bi1/2Na1/2TiO3-BaTiO3 based thick-film capacitors for high-temperature applications
DOI:10.1016/j.jeurceramsoc.2013.07.020  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Zang, Jiadong;Jo, Wook;Zhang, Haibo;Roedel, Juergen;
7:1:88:2     Electrical properties of Bi(Ni1/2Ti1/2)O-3-PbTiO3 high-T-c piezoelectric ceramics fabricated by the microwave sintering process
DOI:10.1016/j.mseb.2013.09.012  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:2  AU: Jiang, Shenglin;Zhu, Zhongjiang;Zhang, Ling;Xiong, Xue;Yi, Jinqiao;Zeng, Yike;Liu, Wen;Wang, Qing;Han, Kuo;Zhang, Guangzu;
7:1:88:3     Dielectric, Ferroelectric, Pyroelectric, and Piezoelectric Properties of La-Modified Lead-Free Sodium-Potassium Bismuth Titanate Thick Films
DOI:10.1111/j.1551-2916.2009.03450.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Zhang, Haibo;Jiang, Shenglin;Kajiyoshi, Koji;Xiao, Jianzhong;
7:1:88:4     Effects of Bi2O3-Li2CO3 additions on dielectric and pyroelectric properties of Mn doped Pb(Zr0.9Ti0.1)O-3 thick films
DOI:10.1016/j.ceramint.2012.10.204  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Zeng, Yike;Yao, Fei;Zhang, Guangzu;Liu, Sisi;Jiang, Shenglin;Yu, Yan;He, Jungang;Zhang, Ling;Yi, Jinqiao;
7:1:88:5     Preparation and Electrical Properties of High-T-C Piezoelectric Ceramics of Strontium-Substituted Bi(Ni1/2Ti1/2)O-3-PbTiO3
DOI:10.1111/j.1551-2916.2012.05078.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:13  AU: Kang, Huajun;Chen, Jun;Liu, Laijun;Hu, Changzheng;Fang, Liang;Xing, Xianran;
7:1:88:6     Synthesis and properties of Pb(Zn1/3Nb2/3)O-3 modified Pb(Zr0.95Ti0.05)O-3 pyroelectric ceramics
DOI:10.1016/j.ceramint.2014.01.081  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Wei, Hui;Chen, Yongjun;
7:1:88:7     Low-Temperature Sintering and Electric Properties of Pb-0.99(Zr0.95Ti0.05)(0.98)Nb0.02O3 Ferroelectric Ceramics with CuO Additive
DOI:10.1111/jace.12487  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Wang, Junxia;Wang, Genshui;Nie, Hengchang;Chen, Xuefeng;Cao, Fei;Dong, Xianlin;Gu, Yan;He, Hongliang;
7:1:88:8     Low-Temperature Sintering and Properties of 0.98PZT-0.02SKN Ceramics with LiBiO2 and CuO Addition
DOI:10.1111/j.1551-2916.2011.04504.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Zhang, Wenli;Eitel, Richard E.;
7:1:88:9     Nonlinear dielectric properties of (Bi0.5Na0.5)TiO3-based lead-free piezoelectric thick films
DOI:10.1063/1.3557525  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Zhang, Haibo;Jiang, Shenglin;Kajiyoshi, Koji;
7:1:88:10     Quenching-induced circumvention of integrated aging effect of relaxor lead lanthanum zirconate titanate and (Bi1/2Na1/2)TiO3-BaTiO3
DOI:10.1063/1.4788932  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Zang, Jiadong;Jo, Wook;Roedel, Juergen;
7:1:88:11     Low temperature preparation and electrical properties of sodium-potassium bismuth titanate lead-free piezoelectric thick films by screen printing
DOI:10.1016/j.jeurceramsoc.2010.07.012  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Zhang, Haibo;Jiang, Shenglin;Xiao, Jianzhong;Kajiyoshi, Koji;
7:1:88:12     Effects of Filler Size and Distribution on Viscous Behavior of Glass Composites
DOI:10.1111/j.1551-2916.2012.05181.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Samal, Sneha;Kim, Sunil;Kim, Hyungsun;
7:1:88:13     Tensile stress induced depolarization in [001]-poled transverse mode Pb(Zn-1/3Nb(2/3))O-3 -(6-7)%PbTiO3 single crystals
DOI:10.1063/1.3552587  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Shukla, Rahul;Lim, Leong-Chew;Gandhi, Prasanna;
7:1:88:14     Bimodal distribution of filler on viscosity and thermal expansion of glass composites
DOI:10.1016/j.ceramint.2012.08.008  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Samal, Sneha;Cho, Sunghwan;Kim, Hyungsun;
7:1:89:1     Ferroelectric domain structure of anisotropically strained NaNbO3 epitaxial thin films
DOI:10.1063/1.4876906  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Schwarzkopf, J.;Braun, D.;Schmidbauer, M.;Duk, A.;Woerdenweber, R.;
7:1:89:2     Anisotropic ferroelectric properties of anisotropically strained epitaxial NaNbO3 films
DOI:10.1063/1.4882296  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Cai, B.;Schwarzkopf, J.;Hollmann, E.;Schmidbauer, M.;Abdel-Hamed, M. O.;Woerdenweber, R.;
7:1:89:3     Phase diagrams, dielectric response, and piezoelectric properties of epitaxial ultrathin (001) lead zirconate titanate films under anisotropic misfit strains
DOI:10.1063/1.3386465  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Qiu, Q. Y.;Alpay, S. P.;Nagarajan, V.;
7:1:89:4     Impact of compressive in-plane strain on the ferroelectric properties of epitaxial NaNbO3 films on (110) NdGaO3
DOI:10.1063/1.4822328  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Woerdenweber, R.;Schwarzkopf, J.;Hollmann, E.;Duk, A.;Cai, B.;Schmidbauer, M.;
7:1:89:5     Relaxor ferro- and paraelectricity in anisotropically strained SrTiO3 films
DOI:10.1063/1.4802676  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Woerdenweber, R.;Schubert, J.;Ehlig, T.;Hollmann, E.;
7:1:89:6     Ferroelectric Q-phase in a NaNbO3 epitaxial thin film
DOI:10.1063/1.3437090  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Yuzyuk, Yu. I.;Shakhovoy, R. A.;Raevskaya, S. I.;Raevski, I. P.;El Marssi, M.;Karkut, M. G.;Simon, P.;
7:1:89:7     Anisotropic one-dimensional domain pattern in NaNbO3 epitaxial thin films grown on (110) TbScO3
DOI:10.1063/1.4794405  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Duk, A.;Schmidbauer, M.;Schwarzkopf, J.;
7:1:89:8     Enhanced ferroelectric polarization in tetragonally strained NaNbO3 thin film on single crystal Rh substrate
DOI:10.1016/j.jcrysgro.2012.04.009  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:5  AU: Maeng, W. J.;Jung, I.;Son, J. Y.;
7:1:89:9     Observation of domain structure in 001 orientated NaNbO3 films deposited on (001)SrTiO3 substrates by laser beam scanning microscopy
DOI:10.1063/1.3330963  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Yamazoe, Seiji;Sakurai, Hiroyuki;Saito, Takehisa;Wada, Takahiro;
7:1:89:10     Laser beam scanning microscope and piezoresponse force microscope studies on domain structured in 001-, 110-, and 111-oriented NaNbO3 films
DOI:10.1063/1.4746079  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Yamazoe, Seiji;Kohori, Akihiro;Sakurai, Hiroyuki;Kitanaka, Yuuki;Noguchi, Yuji;Miyayama, Masaru;Wada, Takahiro;
7:1:89:11     Stress Generated Modifications of Structural and Morphologic Properties of Epitaxial SrTiO3 Films on Sapphire
DOI:10.1080/00150193.2012.677690  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Woerdenweber, R.;Grellmann, T.;Greben, K.;Schubert, J.;Kutzner, R.;Hollmann, E.;
7:1:90:1     Grain size effect on the nonlinear dielectric properties of barium titanate ceramics
DOI:10.1063/1.3526375  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:27  AU: Curecheriu, Lavinia;Buscaglia, Maria Teresa;Buscaglia, Vincenzo;Zhao, Zhe;Mitoseriu, Liliana;
7:1:90:2     Enhanced dielectric and piezoelectric properties of Mn doped (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3-SrTiO3 thin films
DOI:10.1016/j.jallcom.2013.05.127  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:9  AU: Li, Wei;Zeng, Huarong;Hao, Jigong;Zhai, Jiwei;
7:1:90:3     Effect of Anneal Conditions on Electrical Properties of Mn-Doped (Na0.85K0.15)(0.5)Bi0.5TiO3 Thin Films Prepared by Sol-Gel Method
DOI:10.1111/j.1551-2916.2010.04325.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Wu, Yunyi;Wang, Xiaohui;Zhong, Caifu;Li, Longtu;
7:1:90:4     Effects of Mn doping on structural and dielectric properties of sol-gel-derived (Ba0.835Ca0.165)(Zr0.09Ti0.91)O-3 thin films
DOI:10.1016/j.tsf.2012.03.132  JN:THIN SOLID FILMS  PY:2012
  TC:10  AU: Lin, Yanting;Miao, Xinrui;Qin, Ni;Zhou, Hong;Deng, Wenli;Bao, Dinghua;
7:1:90:5     Fabrication and Electrical Properties of Sol-Gel-Derived 0.63Bi(Mg1/2Ti1/2)O-3-0.37PbTiO(3) Thin Films
DOI:10.1111/j.1551-2916.2011.04856.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Liu, Longdong;Zuo, Ruzhong;
7:1:90:6     Structure and composition of Ba0.5Sr0.5TiO3 films deposited on (001) MgO substrates and the influence of sputtering pressure
DOI:10.1016/j.tsf.2013.09.057  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Twigg, M. E.;Alldredge, L. M. B.;Chang, W.;Podpirka, A.;Kirchoefer, S. W.;Pond, J. M.;
7:1:90:7     Applicability of the Bruggeman Equation for Analyzing Dielectric Slurries Containing Ceramic Powders with High Permittivity
DOI:10.1111/j.1551-2916.2011.05010.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Zhou, Wei;Hinojosa, Beverly Brooks;Nino, Juan C.;
7:1:90:8     Effect of PbTiO3 seed layer on the orientation behavior and electrical properties of Bi(Mg1/2Ti1/2)O-3-PbTiO3 ferroelectric thin films
DOI:10.1016/j.ceramint.2012.10.229  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Liu, Longdong;Zuo, Ruzhong;Liang, Qi;
7:1:90:9     Impedance spectroscopy of BaTiO3 cubes suspended in lossy liquids as a physical model of two-phase system
DOI:10.1063/1.3486461  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Jasinski, Piotr;Petrovsky, Vladimir;Dogan, Fatih;
7:1:90:10     Effective dielectric constant of two phase systems: Application to mixed conducting systems
DOI:10.1063/1.4743985  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Petrovsky, Vladimir;Jasinski, Piotr;Dogan, Fatih;
7:1:91:1     Phase transition behavior and electrical properties of [(K0.50Na0.50)(1-x)Ag-x](Nb1-xTax)O-3 lead-free ceramics
DOI:10.1016/j.jallcom.2009.09.047  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Wang, Yuanyu;Qibin, Liu;Zhao, Fei;
7:1:91:2     Phase transition, microstructure, and dielectric properties of Li/Ta/Sb co-doped (K, Na)NbO3 lead-free ceramics
DOI:10.1016/j.ceramint.2013.08.110  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Qian, Shaohua;Zhu, Kongjun;Pang, Xuming;Liu, Jinsong;Qiu, Jinhao;Du, Jianzhou;
7:1:91:3     Co2O3 doped (Na0.65K0.35)NbO3 piezoceramics
DOI:10.1016/j.matlet.2010.03.036  JN:MATERIALS LETTERS  PY:2010
  TC:15  AU: Zang, Guo-Zhong;Yi, Xiu-Jie;Du, Juan;Wang, Yue-Fang;
7:1:91:4     Enhanced dielectric, ferroelectric and optical properties of lead free (K0.17Na0.83)NbO3 ceramic with WO3 addition
DOI:10.1016/j.mseb.2013.09.014  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Rani, Jyoti;Yadav, K. L.;Prakash, Satya;
7:1:91:5     Combinatorial processing libraries for bulk BiFeO3-PbTiO3 piezoelectric ceramics
DOI:10.1007/s00339-010-5574-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:9  AU: Hu, W.;Tan, X.;Rajan, K.;
7:1:91:6     K0.5Na0.5NbO3-Based Lead-Free Transparent Electro-Optic Ceramics Prepared by Pressureless Sintering
DOI:10.1111/jace.12539  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Li, Faliang;Kwok, Kin-Wing;
7:1:91:7     Fabrication of transparent electro-optic (K0.5Na0.5)(1-x)LixNb1-xBixO3 lead-free ceramics
DOI:10.1016/j.jeurceramsoc.2012.08.017  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:11  AU: Li, Faliang;Kwok, K. W.;
7:1:91:8     Effect of monovalent ions on the piezoelectric properties of (Na0.5K0.5)NbO3-(M)TaO3 ceramics
DOI:10.1016/j.ceramint.2011.04.107  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Lee, Young Seok;Kim, Young Ho;Kang, Dong Heon;
7:1:91:9     Electrical properties of [Ag-0.2(K0.52Na0.48)(0.8)](Nb1-xTax)O-3 ceramics
DOI:10.1016/j.ceramint.2012.10.198  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Eoh, Young Jun;Cho, Jeong Ho;Kim, Byung Ik;Kim, Eung Soo;
7:1:91:10     Structural and Electrical Properties of AgTaO3-modified (Na0.465K0.465Li0.07) NbO3 Lead-Free Ceramics
DOI:10.1080/00150193.2013.850016  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Bomlai, Pornsuda;Milne, Steven J.;
7:1:91:11     Effects of W2/3Bi1/3 substitute on piezoelectric properties of KNN-based ceramics
DOI:10.1016/j.matlet.2011.11.113  JN:MATERIALS LETTERS  PY:2012
  TC:4  AU: Du, Juan;Zang, Guo-Zhong;Yi, Xiu-Jie;Zhang, Da-Feng;Huang, Zhen-Feng;
7:1:91:12     Effects of Al2O3 on the ferroelectric properties of sodium potassium lithium niobate lead-free piezoceramics
DOI:10.1016/j.ceramint.2012.10.167  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Lee, I. H.;Lee, H. S.;Kim, Y. H.;Gil, S. K.;Kang, D. H.;
7:1:91:13     Hot-pressed K0.48Na0.52Nb1-xBixO3 (x=0.05-0.15) lead-free ceramics for electro-optic applications
DOI:10.1016/j.matchemphys.2011.09.048  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:8  AU: Li, Kun;Li, Fa Liang;Wang, Yu;Kwok, Kin Wing;Chan, Helen Lai Wa;
7:1:91:14     Effects of AgNbO3 on Microstructure, Dielectric and Piezoelectric Properties of (Li,Na,K) (Nb,Ta,Sb,Cu)O3 System Ceramics
DOI:10.1080/10584587.2012.737217  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Lee, Kabsoo;Yoo, Juhyun;
7:1:92:1     Precursor dynamics in the ferroelectric phase transition of barium titanate single crystals studied by Brillouin light scattering
DOI:10.1103/PhysRevB.84.094123  JN:PHYSICAL REVIEW B  PY:2011
  TC:27  AU: Ko, Jae-Hyeon;Kim, Tae Hyun;Roleder, K.;Rytz, D.;Kojima, Seiji;
7:1:92:2     Broken Local Symmetry in Paraelectric BaTiO3 Proved by Second Harmonic Generation
DOI:10.1103/PhysRevLett.108.247601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:21  AU: Pugachev, A. M.;Kovalevskii, V. I.;Surovtsev, N. V.;Kojima, S.;Prosandeev, S. A.;Raevski, I. P.;Raevskaya, S. I.;
7:1:92:3     Dielectric properties of 0.4Na(0.5)Bi(0.5)TiO(3)-(0.6-x)SrTiO3-xPbTiO(3) solid solutions
DOI:10.1016/j.actamat.2013.11.040  JN:ACTA MATERIALIA  PY:2014
  TC:3  AU: Svirskas, Sarunas;Ivanov, Maksim;Bagdzevicius, Sarunas;Macutkevic, Jan;Brilingas, Algirdas;Banys, Juras;Dec, Jan;Miga, Seweryn;Dunce, Marija;Birks, Eriks;Antonova, Maija;Sternberg, Andris;
7:1:92:4     Observation of rhombohedral nanostructures in the orthorhombic phase of KNbO3 using convergent-beam electron diffraction
DOI:10.1063/1.4791679  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;
7:1:92:5     Thermal hysteresis of local instabilities in paraelectric phase of PbZr0.96Sn0.04 O-3 single crystals
DOI:10.1063/1.4801980  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Jankowska-Sumara, Irena;Szot, Krzysztof;Majchrowski, Andrzej;Roleder, Krystian;
7:1:92:6     Nanoscale local structures of rhombohedral symmetry in the orthorhombic and tetragonal phases of BaTiO3 studied by convergent-beam electron diffraction
DOI:10.1103/PhysRevB.86.214106  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;
7:1:92:7     Two-dimensional mapping of polarizations of rhombohedral nanostructures in the tetragonal phase of BaTiO3 by the combined use of the scanning transmission electron microscopy and convergent-beam electron diffraction methods
DOI:10.1063/1.4819221  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Tsuda, Kenji;Yasuhara, Akira;Tanaka, Michiyoshi;
7:1:92:8     Phase Transitions in Li, K and Ag Modified Na1/2Bi1/2TiO3-SrTiO3-PbTiO3 Solid Solutions
DOI:10.1080/10584587.2012.730948  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Dunce, M.;Birks, E.;Antonova, M.;Plaude, A.;Sternberg, A.;
7:1:92:9     Calorimetry in Ferroelectricity: Trends and Some New Results
DOI:10.1080/00150193.2014.895202  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Strukov, B.;Onodera, A.;Lemanov, V.;Shnaidshtein, I.;Grabovsky, S.;Davitadze, S.;Milov, E.;
7:1:92:10     Pre-Transitional Effect and an Intermediate Phase in the Antiferroelectric PbZr0.80Sn0.20O3 Single Crystal
DOI:10.1080/00150193.2010.505482  JN:FERROELECTRICS  PY:2010
  TC:7  AU: Jankowska-Sumara, I.;Gorny, M.;Rusek, K.;Majchrowski, A.;Zmija, J.;Roleder, K.;
7:1:92:11     Phase Transitions in Modified Na1/2Ba1/2TiO3-SrTiO3-PbTiO3 Solid Solutions
DOI:10.1080/00150193.2011.577338  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Dunce, M.;Birks, E.;Antonova, M.;Sternberg, A.;
7:1:92:12     Ferroelectric Phase Transitions in Small Particles and Local Regions
DOI:10.1103/PhysRevLett.111.097601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Levanyuk, A. P.;Blinc, R.;
7:1:92:13     Low Frequency Raman Scattering in BaTiO3 Crystal
DOI:10.1080/00150193.2013.778658  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Malinovsky, V. K.;Pugachev, A. M.;Popova, V. A.;Surovtsev, N. V.;Kojima, S.;
7:1:92:14     Description of Relaxor State in Na1/2Bi1/2TiO3-SrTiO3-PbTiO3 System of Solid Solutions
DOI:10.1080/10584587.2011.570603  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:1  AU: Dunce, M.;Birks, E.;Antonova, M.;Kundzinsh, M.;
7:1:92:15     Dynamics of Phase Transition in 0.4NBT-0.4ST-0.2PT Solid Solution
DOI:10.1080/10584587.2012.665300  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Svirskas, S.;Ivanov, M.;Bagdzevicius, S.;Dunce, M.;Antonova, M.;Birks, E.;Sternberg, A.;Brilingas, A.;Banys, J.;
7:1:93:1     Nonlinear stress-strain behavior and stress-induced phase transitions in soft Pb(Zr1-xTix)O-3 at the morphotropic phase boundary
DOI:10.1103/PhysRevB.87.094116  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Seo, Yo-Han;Franzbach, Daniel J.;Koruza, Jurij;Bencan, Andreja;Malic, Barbara;Kosec, Marija;Jones, Jacob L.;Webber, Kyle G.;
7:1:93:2     Temperature-dependent R-curve behavior of Pb(Zr1-xTix)O-3
DOI:10.1016/j.actamat.2013.07.020  JN:ACTA MATERIALIA  PY:2013
  TC:2  AU: Seo, Yo-Han;Voegler, Malte;Isaia, Daniel;Aulbach, Emil;Roedel, Juergen;Webber, Kyle G.;
7:1:93:3     Compositional Dependence of R-curve Behavior in Soft Pb(Zr1-xTix)O-3 Ceramics
DOI:10.1111/j.1551-2916.2011.04889.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Seo, Yo-Han;Bencan, Andreja;Koruza, Jurij;Malic, Barbara;Kosec, Marija;Webber, Kyle G.;
7:1:93:4     Structure and the Electrical Properties of Pb(Zr,Ti)O-3 - Zirconia Composites
DOI:10.1111/j.1551-2916.2011.04803.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Bencan, Andreja;Malic, Barbara;Drnovsek, Silvo;Tellier, Jenny;Rojac, Tadej;Pavlic, Jernej;Kosec, Marija;Webber, Kyle G.;Roedel, Juergen;Damjanovic, Dragan;
7:1:93:5     Simultaneous Enhancement of Fracture Toughness and Unipolar Strain in Pb(Zr,Ti)O-3-ZrO2 Composites Through Composition Adjustment
DOI:10.1111/jace.12929  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Seo, Yo-Han;Koruza, Jurij;Bencan, Andreja;Malic, Barbara;Roedel, Juergen;Webber, Kyle G.;
7:1:93:6     Identification of crystalline elastic anisotropy in PZT ceramics from in-situ blocking stress measurements
DOI:10.1063/1.4874222  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Daniel, L.;Hall, D. A.;Webber, K. G.;King, A.;Withers, P. J.;
7:1:93:7     Evaluation of the homogeneity in Pb(Zr,Ti)O-3-zirconia composites prepared by the hetero-agglomeration of precursors using the Voronoi-diagram approach
DOI:10.1016/j.jeurceramsoc.2013.09.014  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Trefalt, Gregor;Bencan, Andreja;Kamplet, Mitja;Malic, Barbara;Seo, Yohan;Webber, Kyle G.;
7:1:93:8     Deconvolving Ferroelastic and Phase Transformation Toughening in Pb(Zr1-xTix)O-3 and Pb1-yLay(Zr1-xTix)O-3
DOI:10.1111/jace.12007  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Seo, Yo-Han;Webber, Kyle G.;Bencan, Andreja;Koruza, Jurij;Malic, Barbara;Kosec, Marija;Roedel, Juergen;
7:1:93:9     Fabrication and Characterization of Flexible PZT Fiber and Composite
DOI:10.1080/00150193.2012.732513  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Yi, Chung-Hao;Lin, Chia-Hsin;Wang, Yi-Hui;Cheng, Syh-Yuh;Chang, Horng-Yi;
7:1:93:10     Surface-condensed piezoelectric fibers and composites
DOI:10.1016/j.matchemphys.2014.05.019  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Chang, Horng-Yi;Yi, Chung-Hao;Lin, Chia-Hsin;Cheng, Syh-Yuh;
7:1:93:11     R-Curve Behavior of Pb(Mg1/3Nb2/3)O-3-29 mol% PbTiO3 Single Crystals: The Effect of Crystallographic Orientation and Grain Structure
DOI:10.1111/j.1551-2916.2011.04677.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Webber, Kyle G.;Seo, Yo-Han;Lee, Ho-Yong;Aulbach, Emil;Jo, Wook;Roedel, Juergen;
7:1:94:1     Phase stability and structural temperature dependence in sodium niobate: A high-resolution powder neutron diffraction study
DOI:10.1103/PhysRevB.83.134105  JN:PHYSICAL REVIEW B  PY:2011
  TC:21  AU: Mishra, S. K.;Mittal, R.;Pomjakushin, V. Yu.;Chaplot, S. L.;
7:1:94:2     Novel High-Temperature Antiferroelectric-Based Dielectric NaNbO3-NaTaO3 Solid Solutions Processed in Low Oxygen Partial Pressures
DOI:10.1111/jace.12065  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:11  AU: Kobayashi, Keisuke;Ryu, Minoru;Doshida, Yutaka;Mizuno, Youichi;Randall, Clive A.;
7:1:94:3     Suppression of antiferroelectric state in NaNbO3 at high pressure from in situ neutron diffraction
DOI:10.1063/1.4771983  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Mishra, S. K.;Gupta, M. K.;Mittal, R.;Chaplot, S. L.;Hansen, Thomas;
7:1:94:4     Enhancement of Piezoelectric Performance of Lead-Free NKN-Based Ceramics via a High-Performance Flux-NaF-Nb2O5
DOI:10.1111/jace.12461  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Liu, Cheng;Liu, Peng;Kobayashi, Keisuke;Qu, Wei-guo;Randall, Clive A.;
7:1:94:5     The effect of Li-substitution on the M-phases of AgNbO3
DOI:10.1063/1.3677871  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Khan, H. U.;Sterianou, I.;Miao, S.;Pokorny, J.;Reaney, I. M.;
7:1:94:6     Phonon dynamics and inelastic neutron scattering of sodium niobate
DOI:10.1103/PhysRevB.89.184303  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Mishra, S. K.;Gupta, M. K.;Mittal, R.;Zbiri, M.;Rols, S.;Schober, H.;Chaplot, S. L.;
7:1:94:7     A Route Forwards to Narrow the Performance Gap between PZT and Lead-Free Piezoelectric Ceramic with Low Oxygen Partial Pressure Processed (Na0.5K0.5)NbO3
DOI:10.1111/j.1551-2916.2012.05266.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:19  AU: Kobayashi, Keisuke;Doshida, Yutaka;Mizuno, Youichi;Randall, Clive A.;
7:1:94:8     Effect of particle size and strain on phase stability of (Li-0.06 Na-0.94)NbO3
DOI:10.1063/1.4875481  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Mishra, S. K.;Shinde, A. B.;Krishna, P. S. R.;
7:1:94:9     Relative phase stability and lattice dynamics of NaNbO3 from first-principles calculations
DOI:10.1103/PhysRevB.84.134107  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Machado, R.;Sepliarsky, M.;Stachiotti, M. G.;
7:1:94:10     Local structure of NaNbO3: A neutron scattering study
DOI:10.1103/PhysRevB.88.014105  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Jiang, Lu;Mitchell, D. C.;Dmowski, W.;Egami, T.;
7:1:94:11     Phase transitions in LixAg1-x(Nb0.5Ta0.5)O-3 solid solutions
DOI:10.1063/1.3485813  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Khan, H. U.;Sterianou, I.;Han, Y.;Pokorny, J.;Reaney, I. M.;
7:1:94:12     Response to "Comment on 'Effect of particle size and strain on phase stability of (Li0.06Na0.94)NbO3'" [J. Appl. Phys. 116, 206101 (2014)]
DOI:10.1063/1.4902392  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Mishra, S. K.;Shinde, A. B.;Krishna, P. S. R.;
7:1:94:13     Comment on "Effect of particle size and strain on phase stability of (Li0.06Na0.94)NbO3" [J. Appl. Phys. 115, 174104 (2014)]
DOI:10.1063/1.4902391  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Nalbandyan, V. B.;
7:1:94:14     Dielectric and Elastic Parameters of LixNa1-xTa0.1Nb0.9O3 Ferroelectric Solid Solution Ceramics
DOI:10.1080/10584587.2011.570661  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:1  AU: Efremov, V.;Palatnikov, M.;Sidorov, N.;Bormanis, K.;
7:1:95:1     Grain-size effects on dielectric and piezoelectric properties of poled BaTiO3 ceramics
DOI:10.1016/j.actamat.2012.06.015  JN:ACTA MATERIALIA  PY:2012
  TC:32  AU: Zheng, P.;Zhang, J. L.;Tan, Y. Q.;Wang, C. L.;
7:1:95:2     Domain Wall Displacement is the Origin of Superior Permittivity and Piezoelectricity in BaTiO 3 at Intermediate Grain Sizes
DOI:10.1002/adfm.201301913  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:14  AU: Ghosh, Dipankar;Sakata, Akito;Carter, Jared;Thomas, Pam A.;Han, Hyuksu;Nino, Juan C.;Jones, Jacob L.;
7:1:95:3     Grain Size Effects on Piezoelectric Properties and Domain Structure of BaTiO3 Ceramics Prepared by Two-Step Sintering
DOI:10.1111/jace.12601  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:12  AU: Huan, Yu;Wang, Xiaohui;Fang, Jian;Li, Longtu;
7:1:95:4     Grain size effect on piezoelectric and ferroelectric properties of BaTiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2013.11.030  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Huan, Yu;Wang, Xiaohui;Fang, Jian;Li, Longtu;
7:1:95:5     Effect of grain size on domain structures, dielectric and thermal depoling of Nd-substituted bismuth titanate ceramics
DOI:10.1063/1.4827537  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Viola, Giuseppe;Chong, Kok Boon;Eriksson, Mirva;Shen, Zhijian;Zeng, Jiangtao;Yin, Qingrui;Kan, Yanmei;Wang, Peiling;Ning, Huanpo;Zhang, Hongtao;Fitzpatrick, Michael E.;Reece, Michael J.;Yan, Haixue;
7:1:95:6     Strong piezoelectricity exhibited by large-grained BaTiO3 ceramics
DOI:10.1063/1.4881597  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhang, J. L.;Ji, P. F.;Wu, Y. Q.;Zhao, X.;Tan, Y. Q.;Wang, C. L.;
7:1:95:7     Effect of Grain Size of BaTiO3 Ceramics on Dielectric Properties
DOI:10.1080/00150191003697377  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Ding Shihua;Song Tianxiu;Yang Xiaojing;Luo Guanghua;
7:1:95:8     Size Effect and Domain-Wall Contribution of Barium Titanate Ceramics
DOI:10.1080/00150191003697179  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Hoshina, Takuya;Kigoshi, Yoichi;Hatta, Saki;Teranishi, Takashi;Takeda, Hiroaki;Tsurumi, Takaaki;
7:1:95:9     Mn-doped 0.15BiInO(3)-0.85PbTiO(3) piezoelectric films deposited by pulsed laser deposition
DOI:10.1063/1.4718528  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Lee, Sun Young;Ko, Song Won;Lee, Soonil;Trolier-McKinstry, Susan;
7:1:95:10     High Curie temperature BiInO3-PbTiO3 films
DOI:10.1063/1.4881797  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Lee, Sun Young;Wang, Wei;Trolier-McKinstry, Susan;
7:1:95:11     Strain Evolution of Highly Asymmetric Polycrystalline Ferroelectric Ceramics via a Self-Consistent Model and In Situ X-Ray Diffraction
DOI:10.1111/jace.12011  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Tutuncu, Goknur;Motahari, Maziar;Bernier, Joel;Varlioglu, Mesut;Jones, Jacob L.;Ustundag, Ersan;
7:1:96:1     Nonmonotonic variation of aging behavior in Fe-doped BaTiO3 ceramics
DOI:10.1063/1.4890383  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Huang, Fengzhen;Jiang, Zhenghao;Lu, Xiaomei;Ti, Ruixia;Wu, Huarui;Kan, Yi;Zhu, Jinsong;
7:1:96:2     Large electrostrain in poled and aged acceptor-doped ferroelectric ceramics via reversible domain switching
DOI:10.1063/1.4905359  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhao, Xiaobo;Liang, Ruihong;Zhang, Wenbin;Wang, Genshui;Dong, Xianlin;
7:1:96:3     Investigations on structure, ferroelectric, piezoelectric and energy storage properties of barium calcium titanate (BCT) ceramics
DOI:10.1016/j.jallcom.2013.09.108  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Puli, Venkata Sreenivas;Pradhan, Dhiren K.;Riggs, Brian C.;Chrisey, Douglas B.;Katiyar, Ram S.;
7:1:96:4     Kinetics controlled aging effect of ferroelectricity in Al-doped and Ga-doped BaTiO3
DOI:10.1063/1.3490700  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Guo, Y. Y.;Qin, M. H.;Wei, T.;Wang, K. F.;Liu, J. -M.;
7:1:96:5     Large digital-characterized electrostrain in Mn-doped (Pb,Sr)TiO3 electro-shape-memory ceramics
DOI:10.1063/1.3632079  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Liu, Wenfeng;Zhang, Lixue;Chen, Wei;Li, Shengtao;Ren, Xiaobing;
7:1:96:6     Mn dopant on the "domain stabilization" effect of aged BaTiO3 and PbTiO3-based piezoelectrics
DOI:10.1063/1.4770311  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Zhang, Lixue;Liu, Wenfeng;Chen, Wei;Ren, Xiaobing;Sun, Jun;Gurdal, Erkan A.;Ural, Seyit O.;Uchino, Kenji;
7:1:96:7     Large stable strain memory effect in poled Mn-doped Pb(Mn1/3Sb2/3)O-3-Pb(Zr,Ti)O-3 ceramics
DOI:10.1063/1.4803098  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Du, Gang;Liang, Ruihong;Wang, Li;Li, Kui;Zhang, Wenbin;Wang, Genshui;Dong, Xianlin;
7:1:96:8     Aging effect of Mn-doped Ba0.77Ca0.23TiO3 ceramics
DOI:10.1016/j.jallcom.2014.05.003  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Yue, Qingying;Luo, Laihui;Jiang, Xijie;Li, Weiping;Zhou, Jun;
7:1:96:9     Ferroelectric aging behaviors of BaTi0.995Mn0.005O3 ceramics: grain size effects
DOI:10.1007/s00339-011-6750-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:4  AU: Guo, Y. Y.;Yan, Z. B.;Zhang, N.;Cheng, W. W.;Liu, J. -M.;
7:1:96:10     Improvement in shape memory in magnesium niobate modified PZST
DOI:10.1016/j.ceramint.2010.07.036  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:5  AU: Pathak, Abhishek;Chatterjee, Ratnamala;Prakash, Chandra;
7:1:97:1     Large Electro-Optic Effect in La-Doped 0.75Pb(Mg1/3Nb2/3)O-3-0.25PbTiO(3) Transparent Ceramic by Two-Stage Sintering
DOI:10.1111/j.1551-2916.2010.03675.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:25  AU: Ruan, Wei;Li, Guorong;Zeng, Jiangtao;Bian, Jianjiang;Kamzina, Liudmila S.;Zeng, Huarong;Zheng, Liaoying;Dingy, Aili;
7:1:97:2     Domain dynamics of La-doped PMN-PT transparent ceramics studied by piezoresponse force microscope
DOI:10.1016/j.apsusc.2013.12.180  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:2  AU: Zhao, K. Y.;Ruan, W.;Zeng, H. R.;Zeng, J. T.;Li, G. R.;Yin, Q. R.;
7:1:97:3     Origin of the giant electro-optic Kerr effect in La-doped 75PMN-25PT transparent ceramics
DOI:10.1063/1.3646553  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Ruan, Wei;Li, Guorong;Zeng, Jiangtao;Kamzina, Liudmila S.;Zeng, Huarong;Zhao, Kunyu;Zheng, Liaoying;Ding, Aili;
7:1:97:4     Unusual piezoresponse behavior across the grain boundary of PbMg1/3Nb2/3O3-0.33PbTiO(3) thin films
DOI:10.1016/j.apsusc.2011.04.109  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:4  AU: Leng, X.;Zeng, H. R.;Li, X. M.;He, Y.;Zhao, K. Y.;Wang, W.;
7:1:97:5     Fabrication of PMN-PZT Transparent Ceramics by Two-Stage Sintering
DOI:10.1111/j.1551-2916.2012.05244.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Ruan, Wei;Li, Guorong;Zeng, Jiangtao;Kamzina, Liudmila S.;Zeng, Huarong;Zheng, Liaoying;Ding, Aili;
7:1:97:6     Fabrication of Transparent Pb(Mg1/3Nb2/3)O-3-PbTiO3 Based Ceramics by Conventional Sintering
DOI:10.1111/jace.12574  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Fujii, Ichiro;Yoshida, Ryoichi;Imai, Takahito;Yamazoe, Seiji;Wada, Takahiro;
7:1:97:7     Observation of an unusual optical switching effect in relaxor ferroelectrics Pb(Mg1/3Nb2/3)O-3-Pb(Zr-0.53,Ti-0.47)O-3 transparent ceramics
DOI:10.1063/1.4865405  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhao, Wei;Ruan, Wei;Zeng, Jiangtao;Huang, Lizhu;Zhao, Kunyu;Zheng, Liaoying;Zeng, Huarong;Zhou, Yibo;Yang, Heji;Ruan, Xuezheng;Li, Guorong;
7:1:97:8     The influence of domain structure on the optical and electrical properties of transparent (Pb,La)(Mg1/3Nb2/3)O-3-PbTiO3 ceramics
DOI:10.1016/j.ceramint.2012.10.030  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Zeng, Jiangtao;Li, Guorong;Ruan, Wei;Zheng, Liaoying;Zeng, Huarong;Ding, Aili;Yin, Qingrui;
7:1:97:9     The effect of domain structures on the transparency of PMN-PT Transparent Ceramics
DOI:10.1016/j.optmat.2012.09.011  JN:OPTICAL MATERIALS  PY:2013
  TC:3  AU: Li, G. R.;Ruan, W.;Zeng, J. T.;Zeng, H. R.;Zheng, L. Y.;Kamzina, L. S.;Kopylov, Y.;Kravchenko, V.;
7:1:97:10     Anisotropic polarization response of polar nanostructures in relaxor-type lead lanthanum zirconate titanate ferroelectric ceramics
DOI:10.1007/s00339-010-5734-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:7  AU: Liu, Liming;Zeng, Huarong;Li, Guorong;Yin, Qingrui;
7:1:97:11     Study of Nanoscale Domain Structure and Elastic Response of Lead-Free Piezoelectric Ceramics by Scanning Probe Microscopy
DOI:10.1080/00150193.2013.778556  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Zhao, K. Y.;Sun, F.;Zeng, H. R.;Zheng, L. Y.;Zeng, J. T.;Li, G. R.;Luo, H. S.;Yin, Q. R.;Shur, V. Ya.;
7:1:97:12     Optical characteristics of Er3+-doped PMN-PT transparent ceramics
DOI:10.1016/j.ceramint.2011.12.051  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Wei, Zhihao;Huang, Yanlin;Tsuboi, Taiju;Nakai, Yosuke;Zeng, Jiangtao;Li, Guorong;
7:1:97:13     Effect of La doping in transparent 0.67Pb(Mg1/3Nb2/3)O-3-0.33PbTiO(3) ceramics fabricated by conventional sintering
DOI:10.1557/jmr.2014.170  JN:JOURNAL OF MATERIALS RESEARCH  PY:2014
  TC:0  AU: Fujii, Ichiro;Ono, Hiroyuki;Wada, Takahiro;
7:1:97:14     The synthesis of Er3+-doped PMN-PT transparent ceramic and its infrared luminescence
DOI:10.1016/j.matlet.2011.10.034  JN:MATERIALS LETTERS  PY:2012
  TC:1  AU: Wei, Zhihao;Tsuboi, Taiju;Nakai, Yosuke;Huang, Yanlin;Zeng, Jiangtao;Li, Guorong;
7:1:97:15     Fabrication and dielectric properties of transparent PZN-BT ceramic
DOI:10.1016/j.ceramint.2012.10.056  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Huang, Lizhu;Zeng, Jiangtao;Ruan, Wei;Zhao, Wei;Zhao, Kunyu;Li, Guorong;
7:1:98:1     In situ synthesis of Ba0.5Sr0.5TiO3-Mg2TiO4 composite ceramics and their effective dielectric response
DOI:10.1016/j.scriptamat.2013.04.012  JN:SCRIPTA MATERIALIA  PY:2013
  TC:3  AU: Zhang, Jingji;Shen, Bo;Zhai, Jiwei;Yao, Xi;
7:1:98:2     Microstructure and dielectric property relationships in spherical inclusion ferroelectric composite ceramics
DOI:10.1063/1.4747924  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Zhang, Qiwei;Zhai, Jiwei;Zhang, Haijun;Yao, Xi;
7:1:98:3     Grain size effects on dielectric properties of barium strontium titanate composite ceramics
DOI:10.1016/j.materresbull.2012.11.085  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:5  AU: Zhang, Qiwei;Zhai, Jiwei;Shen, Bo;Zhang, Haijun;Yao, Xi;
7:1:98:4     Low temperature and microwave dielectric properties of TiO2/ZBS glass composites
DOI:10.1016/j.ceramint.2010.02.030  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:8  AU: Kim, Kwan Soo;Shim, Sang Heung;Kim, Shin;Yoon, Sang Ok;
7:1:98:5     Microwave dielectric properties and low sintering temperature of Ba0.5Sr0.5TiO3-Mg2TiO4 composites synthesized in situ by the hydrothermal method
DOI:10.1016/j.ceramint.2012.11.089  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Zhang, Jingji;Shen, Bo;Zhai, Jiwei;Yao, Xi;
7:1:98:6     Dielectric properties of Ba0.5Sr0.5TiO3-MgO composites synthesized by a citrate gel in situ process
DOI:10.1016/j.ceramint.2014.03.084  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Ji, Ludong;Zhang, Jingji;Gao, Yuee;Li, Yanli;Wang, Jiangying;
7:1:98:7     Low Loss, High Tunability of Ba0.4Sr0.6TiO3-Mg3B2O6 Microwave Composite Ceramics
DOI:10.1111/j.1551-2916.2010.03893.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Zhang, Qiwei;Zhai, Jiwei;Yao, Xi;
7:1:98:8     Infrared dielectric response and Raman spectra of tunable Ba0.5Sr0.5TiO3-Mg2TiO4 composite ceramics
DOI:10.1063/1.3280025  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Zhang, Jingji;Zhai, Jiwei;Wang, Jiangying;Shao, Jun;Lu, Xiang;Yao, Xi;
7:1:98:9     Percolative properties in ferroelectric-dielectric composite ceramics
DOI:10.1063/1.3514246  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Zhang, Qiwei;Zhai, Jiwei;Kong, Lingbing;Yao, Xi;
7:1:98:10     A tunable metamaterial dependent on electric field at terahertz with barium strontium titanate thin film
DOI:10.1063/1.4863669  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Bian, Yanlong;Wu, Chao;Li, Hongqiang;Zhai, Jiwei;
7:1:98:11     Percolative property and microwave dielectric characterization of Ba0.4Sr0.6TiO3-Mg2TiO4 diphasic ceramics
DOI:10.1016/j.materresbull.2011.01.011  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:4  AU: Zhang, Qiwei;Qi, Peng;Zhai, Jiwei;Fu, Fang;Yao, Xi;
7:1:98:12     Dielectric Properties of Ba0.7Sr0.3TiO3 Film at Terahertz Measured by Metamaterials
DOI:10.1111/j.1551-2916.2012.05072.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Qi, Peng;Fan, Yuancheng;Li, Hongqiang;Zhang, Qiwei;Zhai, Jiwei;
7:1:98:13     Microwave dielectric properties of high dielectric tunable - low permittivity Ba0.5Sr0.5TiO3-Mg-2(Ti0.95Sn0.05)O-4 composite ceramics
DOI:10.1016/j.ceramint.2011.04.074  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Zhang, Mingwei;Zhai, Jiwei;Yao, Xi;
7:1:99:1     Properties of lanthanum doped BaTiO3 produced from nanopowders
DOI:10.1016/j.ceramint.2010.03.010  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:26  AU: Vijatovic, M. M.;Stojanovic, B. D.;Bobic, J. D.;Ramoska, T.;Bowen, P.;
7:1:99:2     Antimony doping effect on barium titanate structure and electrical properties
DOI:10.1016/j.ceramint.2011.04.015  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:9  AU: Petrovic, M. M. Vijatovic;Bobic, J. D.;Ramoska, T.;Banys, J.;Stojanovic, B. D.;
7:1:99:3     Improvement of barium titanate properties induced by attrition milling
DOI:10.1016/j.ceramint.2012.03.041  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Petrovic, M. M. Vijatovic;Bobic, J. D.;Radojkovic, A. M.;Banys, J.;Stojanovic, B. D.;
7:1:99:4     Engineering grain size and electrical properties of donor-doped barium titanate ceramics
DOI:10.1016/j.ceramint.2010.08.040  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:14  AU: Niesz, Krisztian;Ould-Ely, Teyeb;Tsukamoto, Hisashi;Morse, Daniel E.;
7:1:99:5     Synthesis and dielectric properties of substituted barium titanate ceramics
DOI:10.1016/j.jallcom.2009.08.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:0  AU: Kurmar, Parveen;Singh, Sangeeta;Spah, Manjula;Juneja, J. K.;Prakash, Chandra;Raina, K. K.;
7:1:99:6     Structure study of nanosized La- and Sb-doped BaTiO3
DOI:10.1016/j.jallcom.2010.01.088  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Lazarevic, Z. Z.;Vijatovic, M. M.;Stojanovic, B. D.;Romcevic, M. J.;Romcevic, N. Z.;
7:1:99:7     A comparative study on positive temperature coefficient effect of BaTiO3-K0.5Bi0.5TiO3 ceramics by conventional and microwave sintering
DOI:10.1016/j.ceramint.2013.06.047  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Gao, Pan;Pu, Yongping;Wu, Yurong;Li, Pin;
7:1:99:8     Electrical properties of antimony doped barium titanate ceramics
DOI:10.1016/j.materresbull.2013.05.103  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Petrovic, M. M. Vijatovic;Bobic, J. D.;Banys, J.;Stojanovic, B. D.;
7:1:99:9     Dielectric Characteristics of Ba1-x La (x) TiO3 Ceramics with Submicron Grain Size Prepared by Two-Step Sintering Method
DOI:10.1080/00150193.2014.876807  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Shut, V. N.;Syrtsov, S. R.;Trublovsky, V. L.;Il'Yuschenko, D. A.;Troyanchuk, I. O.;
7:1:99:10     Structural, dielectric and ferroelectric study of microwave sintered lanthanum substituted BaTiO3 ceramics
DOI:10.1016/j.matchemphys.2011.06.028  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:5  AU: Sharma, Sonia;Patel, R. K.;Prakash, C.;Kumar, P.;
7:1:99:11     Low temperature synthesis and dielectric, ferroelectric and piezoelectric study of microwave sintered BaTiO3 ceramics
DOI:10.1016/j.ceramint.2011.09.045  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Sonia;Patel, R. K.;Kumar, P.;Prakash, C.;Agrawal, D. K.;
7:1:99:12     Crystal structure and dielectric properties of (1-x)SrTiO3-xCa(0.4)Sm(0.4)TiO(3) ceramic system at microwave frequencies
DOI:10.1016/j.matchemphys.2014.09.022  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:2  AU: Liu, Fei;Liu, Xin-Yu;Yuan, Chang-Lai;Yang, Tao;Chen, Guo-Hua;Zhou, Chang-Rong;
7:1:100:1     Low-temperature relaxor state induced by epitaxial compression in PbSc0.5Nb0.5O3 films
DOI:10.1103/PhysRevB.87.224107  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Tyunina, M.;Levoska, J.;Janolin, P. -E.;Dejneka, A.;
7:1:100:2     Epitaxial Ferroelectric Heterostructures with Nanocolumn-Enhanced Dynamic Properties
DOI:10.1002/adfm.201201528  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:5  AU: Tyunina, Marina;Yao, Lide;Plekh, Maxim;Levoska, Juhani;van Dijken, Sebastiaan;
7:1:100:3     Ferroelectric transitions in epitaxial Pb0.5Sr0.5TiO3 films studied by dielectric analysis
DOI:10.1103/PhysRevB.84.224105  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Tyunina, M.;Plekh, M.;Antonova, M.;Kalvane, A.;
7:1:100:4     Electric-field-induced transformations in epitaxial relaxor ferroelectric PbMg1/3Nb2/3O3 films
DOI:10.1103/PhysRevB.89.094106  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Tyunina, M.;Pintilie, I.;Iuga, A.;Pintilie, L.;
7:1:100:5     Optical properties of epitaxial relaxor ferroelectric PbSc0.5Nb0.5O3 films
DOI:10.1063/1.4822108  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Lynnyk, A.;Chvostova, D.;Pacherova, O.;Kocourek, T.;Jelinek, M.;Dejneka, A.;Tyunina, M.;
7:1:100:6     Low-temperature evolution of local polarization properties of PbZr0.65Ti0.35O3 thin films probed by piezoresponse force microscopy
DOI:10.1063/1.4869147  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Andreeva, N. V.;Tyunina, M.;Filimonov, A. V.;Rudskoy, A. I.;Pertsev, N. A.;Vakhrushev, S. B.;
7:1:100:7     Ferroelectric domains in epitaxial PbZr0.65Ti0.35O3/La0.5Sr0.5CoO3 heterostructures
DOI:10.1063/1.3467201  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Plekh, M.;Tyunina, M.;
7:1:100:8     Polydomain configuration in epitaxial Pb0.5Sr0.5TiO3/La0.5Sr0.5CoO3 heterostructures
DOI:10.1063/1.3519977  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Plekh, M.;Narkilahti, J.;Levoska, J.;Tyunina, M.;
7:1:101:1     Structural Description of the Macroscopic Piezo- and Ferroelectric Properties of Lead Zirconate Titanate
DOI:10.1103/PhysRevLett.107.077602  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:24  AU: Hinterstein, M.;Rouquette, J.;Haines, J.;Papet, Ph.;Knapp, M.;Glaum, J.;Fuess, H.;
7:1:101:2     Symmetry of domains in morphotropic PbZr1-xTixO3 ceramics
DOI:10.1103/PhysRevB.84.064122  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Schierholz, Roland;Fuess, Hartmut;
7:1:101:3     Zr-shift at the origin of the exceptional piezoelectric properties of PbZr0.52Ti0.48O3
DOI:10.1103/PhysRevB.81.174110  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Al-Zein, A.;Fraysse, G.;Rouquette, J.;Papet, Ph.;Haines, J.;Hehlen, B.;Levelut, C.;Aquilanti, G.;Joly, Y.;
7:1:101:4     Local order and electronic structure of Pb1-xLaxZr0.40Ti0.60O3 materials and its relation with ferroelectric properties
DOI:10.1063/1.4720472  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Mesquita, A.;Michalowicz, A.;Mastelaro, V. R.;
7:1:101:5     Structural contribution to the ferroelectric fatigue in lead zirconate titanate ceramics
DOI:10.1103/PhysRevB.90.094113  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Hinterstein, M.;Rouquette, J.;Haines, J.;Papet, Ph.;Glaum, J.;Knapp, M.;Eckert, J.;Hoffman, M.;
7:1:101:6     Competing order parameters in the Pb(Zr1-xTix)O-3 solid solution at high pressure
DOI:10.1103/PhysRevB.84.144110  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Fraysse, Guillaume;Al-Zein, Ali;Haines, Julien;Rouquette, Jerome;Bornand, Veronique;Papet, Philippe;Bogicevic, Christine;Hull, Steve;
7:1:101:7     Crystallographic changes in lead zirconate titanate due to neutron irradiation
DOI:10.1063/1.4902179  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Henriques, Alexandra;Graham, Joseph T.;Landsberger, Sheldon;Ihlefeld, Jon F.;Brennecka, Geoff L.;Brown, Donald W.;Forrester, Jennifer S.;Jones, Jacob L.;
7:1:101:8     Time-resolved x-ray diffraction study of the piezoelectric crystal response to a fast change of an applied electric field
DOI:10.1063/1.3480996  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Gorfman, Semen;Schmidt, Oleg;Ziolkowski, Michael;von Kozierowski, Marc;Pietsch, Ullrich;
7:1:101:9     Crystal Structure and Compressibility of Pb(Zr1-xTix)O-3 Ceramics Under High Pressure
DOI:10.1111/j.1551-2916.2010.03671.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Ko, Young Ho;Kim, Kwang Joo;Cho, Kyung Ho;Seo, Chang Eui;
7:1:101:10     Role of high-order electromechanical coupling terms in thermodynamics of ferroelectric thin films
DOI:10.1103/PhysRevB.87.184101  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kvasov, Alexander;Tagantsev, Alexander K.;
7:1:101:11     Effect of elastic compliances and higher order Landau coefficients on the phase diagram of single domain epitaxial Pb(Zr, Ti)O-3 (PZT) thin films
DOI:10.1063/1.4905265  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Mtebwa, M.;Tagantsev, A. K.;Setter, N.;
7:1:101:12     Local order of Pb1-xLaxZr0.40Ti0.60O3 ferroelectric ceramic materials probed by X-ray absorption and Raman spectroscopies
DOI:10.1016/j.jallcom.2013.08.130  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Mesquita, A.;Michalowicz, A.;Pizani, P. S.;Provost, K.;Mastelaro, V. R.;
7:1:101:13     Effect of pressure on electric generation of PZT(30/70) and PZT(52/48) ceramics near phase transition pressure
DOI:10.1016/j.jeurceramsoc.2011.08.034  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Cho, Kyung Ho;Seo, Chang Eui;Choi, Yoon Soo;Ko, Young Ho;Kim, Kwang Joo;
7:1:101:14     Spontaneous long and short-range ferroelectric ordering in Pb0.55La0.30TiO3 ceramics
DOI:10.1063/1.3431024  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Mastelaro, V. R.;Mascarenhas, Y. P.;Neves, P. P.;Mir, M.;Doriguetto, A. C.;Michalowicz, A.;Moscovici, J.;Lente, M. H.;Eiras, J. A.;
7:1:102:1     Temperature-dependent ferroelastic switching of ferroelectric ceramics and evolution of linear material properties
DOI:10.1016/j.actamat.2012.08.050  JN:ACTA MATERIALIA  PY:2013
  TC:11  AU: Ji, Dae Won;Kim, Sang-Joo;
7:1:102:2     State dependent pyroelectric and thermal expansion coefficients in a PZT wafer
DOI:10.1016/j.ceramint.2010.05.026  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:14  AU: Kim, Sang-Joo;Kim, Yong Soo;
7:1:102:3     Temperature-dependent compressive creep of ferroelectric ceramics and evolution of remnant state variables
DOI:10.1016/j.jeurceramsoc.2013.02.020  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:5  AU: Kim, Sang-Joo;Ji, Dae Won;
7:1:102:4     Domain switching and creep behavior of a poled PZT wafer under through-thickness electric fields at high temperatures
DOI:10.1016/j.actamat.2009.12.011  JN:ACTA MATERIALIA  PY:2010
  TC:12  AU: Kim, Sang-Joo;Kim, Ju Hong;Lee, Chang-Hoan;
7:1:102:5     Effects of loading rate and temperature on domain switching and evolutions of reference remnant state variables during polarization reversal in a PZT wafer
DOI:10.1016/j.ceramint.2011.08.039  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:9  AU: Lee, Najae;Kim, Sang-Joo;
7:1:102:6     Evolution of remnant state variables and linear material properties in ferroelectric ceramics during compressive loading and unloading
DOI:10.1016/j.ceramint.2013.06.006  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Ji, Dae Won;Kim, Sang-Joo;
7:1:102:7     Determination of reversible and irreversible contributions to the polarization and strain response of soft PZT using the partial unloading method
DOI:10.1016/j.jeurceramsoc.2010.04.042  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:15  AU: Zhou, Dayu;Wang, Ruoyu;Kamlah, Marc;
7:1:102:8     State-dependent pyroelectric and thermal expansion coefficients in a PZT rectangular parallelepiped after compressive loading and unloading
DOI:10.1007/s10853-013-7759-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:1  AU: Ji, Dae Won;Kim, Sang-joo;
7:1:102:9     Evolution of linear moduli and remnant state variables during polarization reversal in a lead zirconate rectangular parallelpiped at room and high temperatures
DOI:10.1063/1.4903319  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ji, Dae Won;Kim, Sang-Joo;
7:1:103:1     NIR to Visible Up-conversion Luminescence of Er3+-Doped PMN-PT Transparent Ceramics
DOI:10.1111/j.1551-2916.2012.05209.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Zeng, Jiangtao;Wei, Zhihao;Huang, Yanlin;Tsuboi, Taiju;Zheng, Liaoying;Ruan, Wei;Wang, Shiwei;Li, Guorong;
7:1:103:2     Mid-IR to Visible Photoluminescence, Dielectric, and Ferroelectric Properties of Er-Doped KNLN Ceramics
DOI:10.1111/jace.12791  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Wu, Xiao;Kwok, K. W.;
7:1:103:3     Upconversion fluorescence studies of sol-gel-derived Er-doped KNN ceramics
DOI:10.1016/j.jallcom.2013.05.096  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:15  AU: Wu, Xiao;Kwok, K. W.;Li, Faliang;
7:1:103:4     Investigation of Up-Conversion Luminescence in Er3+/Yb3+-Codoped Yttria Transparent Ceramic
DOI:10.1111/j.1551-2916.2010.03807.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Hou, Xiaorui;Zhou, Shengming;Li, Wenjie;Li, Yukun;Lin, Hui;Teng, Hao;Jia, Tingting;
7:1:103:5     Enhancement of the up-conversion luminescence of Yb3+/Er3+ or Yb3+/Tm3+ co-doped NaYF4 nanoparticles by photonic crystals
DOI:10.1039/c3tc30895b  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:12  AU: Liao, Jiayan;Yang, Zhengwen;Wu, Hangjun;Yan, Dong;Qiu, Jianbei;Song, Zhiguo;Yang, Yong;Zhou, Dacheng;Yin, Zhaoyi;
7:1:103:6     Energy transfer and photoluminescence modification in Yb-Er-Tm triply doped Y2Ti2O7 upconversion inverse opal
DOI:10.1039/c2jm33418f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:14  AU: Yan, Dong;Zhu, Jialun;Wu, Hangjun;Yang, Zhengwen;Qiu, Jianbei;Song, Zhiguo;Yu, Xue;Yang, Yong;Zhou, Dacheng;Yin, Zhaoyi;Wang, Rongfei;
7:1:103:7     Upconversion Luminescence Properties of Er3+-Yb3+-Codoped Titania-Zirconia Composites
DOI:10.1111/j.1551-2916.2009.03439.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Hu, Yingfei;Wang, Deqiang;Li, Zhijin;Lu, Junjie;Zheng, Jinbiao;
7:1:103:8     Effects of Li+ on structure and spectroscopic properties of Er3+/Li+ codoped Sb2O3-Na2O-SiO2 glasses
DOI:10.1063/1.3408315  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Liu, Lu;Wang, Yuxiao;Bai, Yunfeng;Zhang, Xueru;Yang, Kun;Yang, Le;Song, Yinglin;
7:1:103:9     Infrared to visible upconversion luminescence in Er3+/Yb3+ co-doped CeO2 inverse opal
DOI:10.1016/j.mseb.2013.06.007  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:3  AU: Yang, Zhengwen;Wu, Hangjun;Liao, Jiayan;Li, Wucai;Song, Zhiguo;Yang, Yong;Zhou, Dacheng;Wang, Rongfei;Qiu, Jianbei;
7:1:103:10     Local Heating from Silver Nanoparticles and Its Effect on the Er3+Upconversion in Oxyfluoride Glasses
DOI:10.1111/j.1551-2916.2010.03890.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Liu, Chao;Heo, Jong;
7:1:103:11     Broadband infrared fluorescence in Er3+-doped BaO-SiO2 glasses
DOI:10.1016/j.optmat.2011.03.011  JN:OPTICAL MATERIALS  PY:2011
  TC:2  AU: Masuno, Atsunobu;Inoue, Hiroyuki;Saito, Yoshihiro;
7:1:104:1     Space-charge relaxation and electrical conduction in K0.5Na0.5NbO3 at high temperatures
DOI:10.1007/s00339-011-6358-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:17  AU: Liu, Laijun;Huang, Yanmin;Su, Congxue;Fang, Liang;Wu, Meixia;Hu, Changzheng;Fan, Huiqing;
7:1:104:2     Diffusion phase transition and ferroelectric properties of 0.92K(0.5)Na(0.5)NbO(3)-(0.08-x)Bi0.5Li0.5TiO3-xBaZrO(3) ceramics
DOI:10.1016/j.matchemphys.2011.12.051  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:7  AU: Wu, Meixia;Fang, Liang;Liu, Laijun;Zhou, Xiang;Huang, Yanmin;Li, Yunhua;
7:1:104:3     Frequency and temperature dependent dielectric and conductivity behavior of 0.95(K0.5Na0.5)NbO3-0.05BaTiO(3) ceramic
DOI:10.1016/j.matchemphys.2010.12.046  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:11  AU: Liu, Laijun;Wu, Meixia;Huang, Yanmin;Yang, Zhao;Fang, Liang;Hu, Changzheng;
7:1:104:4     Dielectric properties and electrical conduction of La2O3-doped (Bi0.5Na0.5)(0.94)Ba0.06TiO3 ceramics
DOI:10.1007/s00339-013-7613-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:4  AU: Li, Qiang;Wang, Hairong;Fan, Huiqing;Xu, Mengmeng;Peng, Biaolin;Long, Changbai;Liu, Xiao;
7:1:104:5     Dielectric properties and high-temperature dielectric relaxation of Ba3Ti4Nb4O21 ceramic
DOI:10.1016/j.matchemphys.2013.09.031  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Fang, Liang;Xiang, Fei;Liao, Wei;Liu, Laijun;Zhang, Hui;Kuang, Xiaojun;
7:1:104:6     Dielectric Properties and Defect Chemistry of WO3-Doped K0.5Na0.5NbO3 Ceramics
DOI:10.1007/s11664-013-2975-3  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:3  AU: Wu, Shuangshuang;Zhu, Wenfeng;Liu, Laijun;Shi, Danping;Zheng, Shaoying;Huang, Yanming;Fang, Liang;
7:1:104:7     Orthorhombic to tetragonal structural phase transition in Na0.5K0.5NbO3-based ceramics
DOI:10.1016/j.matlet.2011.10.103  JN:MATERIALS LETTERS  PY:2012
  TC:16  AU: Liu, Laijun;Huang, Yanmin;Li, Yunhua;Fang, Liang;Dammak, Hichem;Fan, Huiqing;Mai Pham Thi;
7:1:104:8     High thermal stability of piezoelectric properties in (Na0.5Bi0.5TiO3)(x)-(BaTiO3)(y)-(Na0.5K0.5NbO3)(1-x-y) ceramics
DOI:10.1063/1.4773983  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Gupta, Shashaank;Priya, Shashank;
7:1:104:9     Comment on "Orthorhombic to tetragonal structural phase transition in Na0.5K0.5NbO3-based ceramics" by Laijun Liu et al.
DOI:10.1016/j.matlet.2014.08.031  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Tomaszewski, Pawel E.;
7:1:105:1     Adsorption of water on the KNTN (001) surface: A density functional theory study
DOI:10.1016/j.apsusc.2014.01.132  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Wang, Wenhan;Shen, Yanqing;Wang, Xiaoou;Zhou, Zhongxiang;Fei, Weidong;
7:1:105:2     Structure and electronic properties of lead-free KTa1-xNbxO3: Accurate Wu-Cohen and screened-exchange study
DOI:10.1016/j.commatsci.2012.07.019  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:5  AU: Shen, Yanqing;Zhou, Zhongxiang;
7:1:105:3     The optical properties of lead-free KTa1/2Nb1/2O3:M where M = Li, Na, H, Cu, Zn
DOI:10.1016/j.commatsci.2013.11.047  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:1  AU: Shen, Yanqing;Wang, Wenhan;Zhou, Zhongxiang;Jiang, Yongyuan;Hou, Chunfeng;
7:1:105:4     First-principles calculations of electronic and optical properties of lead-free KTa1-xNbxO3 under high pressure
DOI:10.1016/j.commatsci.2012.10.023  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2013
  TC:3  AU: Shen, Yanqing;Zhou, Zhongxiang;Wang, Wenhan;Jiang, Yongyuan;Hou, Chunfeng;
7:1:105:5     First-principles study of CO2 adsorption on KNTN (001) surfaces
DOI:10.1016/j.apsusc.2014.04.151  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Shen, Yanqing;Wang, Wenhan;Wang, Xiaoou;Zhou, Zhongxiang;Fei, Weidong;
7:1:105:6     Properties of KNTN [100] surfaces: A first-principles study
DOI:10.1016/j.commatsci.2011.03.011  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2011
  TC:2  AU: Sun Hongguo;Zhou Zhongxiang;Yuan Chengxun;Shen Yanqing;
7:1:105:7     Effect of oxygen atmosphere on the structure and refractive index dispersive behavior of KTa0.5Nb0.5O3 thin films prepared by PLD on Si(0 0 1) substrates
DOI:10.1016/j.apsusc.2011.12.081  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:6  AU: Yang, Wenlong;Zhou, Zhongxiang;Yang, Bin;Jiang, Yongyuan;Pei, Yanbo;Sun, Hongguo;Wang, Ying;
7:1:105:8     Structure and refractive index dispersive behavior of potassium niobate tantalate films prepared by pulsed laser deposition
DOI:10.1016/j.apsusc.2011.03.094  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:6  AU: Yang, Wenlong;Zhou, Zhongxiang;Yang, Bin;Jiang, Yongyuan;Tian, Hao;Gong, Dewei;Sun, Hongguo;Chen, Wen;
7:1:105:9     Sensitivity Properties of Acoustic Emission Sensor Using Lead-free (Na,K,Li)(Nb,Ta,Zn)O-3 System Ceramics
DOI:10.1080/10584587.2012.741500  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Jeong, Yeongho;Byeon, Sunmin;Park, Minho;Yoo, Juhyun;
7:1:105:10     The effect of B-site cations on the properties of KTaxNb1-xO3 [1 0 0] surface: A study of density functional theory
DOI:10.1016/j.commatsci.2010.08.023  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2010
  TC:3  AU: Sun Hongguo;Zhou Zhongxiang;Shen Yanqing;Yuan ChengXun;
7:1:105:11     Adsorption of water on NaNO3(001) surface from first-principles calculations
DOI:10.1016/j.jcis.2012.11.004  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2013
  TC:1  AU: Luo, Jin-Hua;Hu, Ai-Min;Wang, Xiao-Lin;Zhang, Yun-Hong;Li, Ze-Sheng;
7:1:105:12     Temperature influence on the voltage-controlled diffractive property of Mn-doped potassium sodium tantalate niobate crystal
DOI:10.1016/j.optmat.2013.06.050  JN:OPTICAL MATERIALS  PY:2013
  TC:6  AU: Tian, Hao;Jia, Jieshu;Cui, Xuan;Yao, Bo;Zhou, Zhongxiang;Chen, Deying;
7:1:106:1     Energy harvesting in core-shell ferroelectric ceramics: Theoretical approach and practical conclusions
DOI:10.1063/1.4789804  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Anoufa, M.;Kiat, J. M.;Kornev, I.;Bogicevic, C.;
7:1:106:2     Interface Investigation in Nanostructured BaTiO3/Silica Composite Ceramics
DOI:10.1111/j.1551-2916.2009.03474.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Chung, U-Chan;Elissalde, Catherine;Mompiou, Frederic;Majimel, Jerome;Gomez, Sonia;Estournes, Claude;Marinel, Sylvain;Klein, Andreas;Weill, Francois;Michau, Dominique;Mornet, Stephane;Maglione, Mario;
7:1:106:3     Structural investigation of strontium titanate nanoparticles and the core-shell model
DOI:10.1103/PhysRevB.87.024106  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Kiat, J. M.;Bogicevic, C.;Gemeiner, P.;Al-Zein, A.;Karolak, F.;Guiblin, N.;Porcher, F.;Hehlen, B.;Yedra, Ll.;Estrade, S.;Peiro, F.;Haumont, R.;
7:1:106:4     Vortices of polarization in BaTiO3 core-shell nanoceramics: Calculations based on ab initio derived Hamiltonian versus Landau theory
DOI:10.1103/PhysRevB.88.144106  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Anoufa, M.;Kiat, J. M.;Kornev, I.;Bogicevic, C.;
7:1:106:5     Nanocrystalline oxide (Y2O3, Dy2O3, ZrO2, NiO) coatings on BaTiO3 submicron particles by precipitation
DOI:10.1007/s11051-009-9631-0  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2010
  TC:7  AU: Bassano, Alessio;Buscaglia, Vincenzo;Sennour, Mohamed;Buscaglia, Maria Teresa;Viviani, Massimo;Nanni, Paolo;
7:1:106:6     Linking hopping conductivity to giant dielectric permittivity in oxides
DOI:10.1063/1.3495779  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Artemenko, A.;Elissalde, C.;Chung, U. -C.;Estournes, C.;Mornet, S.;Bykov, I.;Maglione, M.;
7:1:106:7     Low-symmetry phases and loss of relaxation in nanosized lead scandium niobate
DOI:10.1103/PhysRevB.81.144122  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Kiat, J. M.;Bogicevic, C.;Karolak, F.;Dezanneau, G.;Guiblin, N.;Ren, W.;Bellaiche, L.;Haumont, R.;
7:1:106:8     Axial hypertoroidal moment in a ferroelectric nanotorus: A way to switch local polarization
DOI:10.1103/PhysRevB.89.220103  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Thorner, Gentien;Kiat, Jean-Michel;Bogicevic, Christine;Kornev, Igor;
7:1:106:9     The possibility of giant dielectric materials for multilayer ceramic capacitors
DOI:10.1063/1.4791555  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Ishii, Tatsuya;Endo, Makoto;Masuda, Kenichiro;Ishida, Keisuke;
7:1:106:10     Evidence of diffusion at BaTiO3/silicon interfaces
DOI:10.1016/j.tsf.2011.09.055  JN:THIN SOLID FILMS  PY:2012
  TC:4  AU: Chung, U-C.;Michau, D.;Elissalde, C.;Li, S.;Klein, A.;Maglione, M.;
7:1:106:11     Size Effects on Dielectric Properties of Nanograin PSN Ceramics
DOI:10.1080/00150193.2012.676947  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Ivanov, Maksim;Banys, Juras;Bogicevic, C.;Kiat, Jean-Michel;
7:1:106:12     Low temperature dielectric relaxation and charged defects in ferroelectric thin films
DOI:10.1063/1.4802242  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Artemenko, A.;Payan, S.;Rousseau, A.;Levasseur, D.;Arveux, E.;Guegan, G.;Maglione, M.;
7:1:107:1     High temperature stress-induced "double loop-like" phase transitions in Bi-based perovskites
DOI:10.1063/1.3428373  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:25  AU: Webber, K. G.;Zhang, Y.;Jo, Wook;Daniels, J. E.;Roedel, J.;
7:1:107:2     Critical mechanical and electrical transition behavior of BaTiO3: The observation of mechanical double loop behavior
DOI:10.1063/1.4767059  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Picht, Gunnar;Webber, Kyle G.;Zhang, Yining;Kungl, Hans;Damjanovic, Dragan;Hoffmann, Michael J.;
7:1:107:3     Influence of uniaxial stress on the ferroelectric-to-paraelectric phase change in barium titanate
DOI:10.1063/1.4799581  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Schader, Florian H.;Aulbach, Emil;Webber, Kyle G.;Rossetti, George A., Jr.;
7:1:107:4     Electric-field-induced paraelectric to ferroelectric phase transformation in prototypical polycrystalline BaTiO3
DOI:10.1063/1.4898573  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wang, Zhiyang;Webber, Kyle G.;Hudspeth, Jessica M.;Hinterstein, Manuel;Daniels, John E.;
7:1:107:5     Mechanical double loop behavior in BaTiO3: Stress induced paraelastic to ferroelastic phase transformation
DOI:10.1063/1.4821446  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Daniels, John E.;Picht, Gunnar;Kimber, Simon;Webber, Kyle G.;
7:1:107:6     Landau expansion parameters for BaTiO3
DOI:10.1063/1.4838456  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Lu, Xiaoyan;Li, Hui;Cao, Wenwu;
7:1:108:1     Vanadium doping effects on microstructure and dielectric properties of barium titanate ceramics
DOI:10.1016/j.ceramint.2011.06.024  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:22  AU: Cai, Wei;Fu, Chunlin;Lin, Zebin;Deng, Xiaoling;
7:1:108:2     Effect of Samarium on the Microstructure, Dielectric and Ferroelectric Properties of Barium Titanate Ceramics
DOI:10.1080/10584587.2012.741466  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:3  AU: Cai, Wei;Fu, Chunlin;Gao, Jiacheng;Deng, Xiaoling;Chen, Gang;Lin, Zebin;
7:1:108:3     Ferroelectric, electrical, and structural properties of Dy and Sc co-doped BaTiO3
DOI:10.1039/c0jm04429f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:16  AU: Ferrarelli, Matthew C.;Tan, Chaou C.;Sinclair, Derek C.;
7:1:108:4     Electrical investigations of holmium-doped BaTiO3 derived from sol-gel combustion
DOI:10.1557/JMR.2010.0149  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:3  AU: Cernea, Mann;Galassi, Carmen;Vasile, Bogdan S.;Ganea, Paul;Radu, Roxana;Ghita, Georgiana;
7:1:108:5     Coexistence of A- and B-Site Vacancy Compensation in La-Doped Sr1-xBaxTiO3
DOI:10.1111/j.1551-2916.2010.03810.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Wang, Lin;Sakka, Yoshio;Shao, Yang;Botton, Gianluigi A.;Kolodiazhnyi, Taras;
7:1:108:6     Reoxidation Effects of Ba-Excessive Barium Titanate Ceramics for Laminated Positive Temperature Coefficient Thermistors
DOI:10.1111/j.1551-2916.2011.05041.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Liu, Jianqiao;Gong, Shuping;Quan, Lin;Chen, Binbin;Zhou, Dongxiang;
7:1:108:7     Influence of Bias on the Friction Imaging of Ferroelectric Domains in Single Crystal Barium Titanate Energy Storage Materials
DOI:10.1155/2014/617436  JN:JOURNAL OF NANOMATERIALS  PY:2014
  TC:0  AU: Chen, Lan;Wu, Di;Xiong, Xiao-Min;Wang, Hai-Yan;Zhang, Jin-Xiu;
7:1:108:8     Structure and Electric Properties of Sm Doped BaTiO3 Ceramics
DOI:10.1080/00150193.2010.482459  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Sun, Haiqin;Wang, Xusheng;Yao, Xi;
7:1:108:9     Polarization- Induced Photoluminescence Quenching in ( Ba0.7Ca0.3TiO3)( BaZr0.2Ti0.8O3): Pr Ceramics
DOI:10.1111/jace.12719  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Zhang, Qiwei;Sun, Haiqin;Zhang, Yin;
7:1:108:10     Influence of thermal history on relaxation process in barium titanate ceramics
DOI:10.1016/j.ceramint.2013.11.080  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Chen, Lan;Wang, Haiyan;Xiong, Xiaomin;Meng, Hui;Zhang, Jinxiu;
7:1:108:11     Structural characterization and photoluminescence of nanocrystalline Ho-doped BaTiO3 derived from sol-gel method
DOI:10.1007/s11051-011-0224-3  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:1  AU: Secu, Mihail;Cernea, Marin;Secu, Corina Elisabeta;Vasile, Bogdan S.;
7:1:108:12     Piezoelectric properties of environmental friendly bismuth doped barium titanate ceramics
DOI:10.1016/j.matlet.2011.12.113  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: Nath, A. K.;Medhi, Nirmali;
7:1:108:13     Coexistence of A- and B-site vacancy compensation in La-doped Sr1-xBaxTiO3 (vol 93, pg 2903, 2010)
DOI:10.1111/j.1551-2916.2010.03992.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:0  AU: Wang, Lin;Sakka, Yoshio;Shao, Yang;Botton, Gianluigi A.;Kolodiazhnyi, Taras;
7:1:109:1     Room temperature ferromagnetism and magnetoelectric coupling in (K0.5Na0.5)NbO3 PLD nanocrystalline films
DOI:10.1016/j.jallcom.2010.11.155  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Cao, Ensi;Hu, Jifan;Qin, Hongwei;Ji, Feng;Zhao, Minglei;Jiang, Minhua;
7:1:109:2     Multiferroic behavior and electrical conduction of BiFeO3 thin film deposited on quartz substrate
DOI:10.1016/j.jallcom.2010.07.134  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Wu, Jiagang;Wang, John;
7:1:109:3     Room-temperature ferromagnetism and ferroelectricity of nanocrystalline La2Ti2O7
DOI:10.1016/j.jallcom.2010.04.137  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:17  AU: Sun, Li;Hu, Jifan;Gao, Feng;Kong, Xiangwei;Qin, Hongwei;Jiang, Minhua;
7:1:109:4     Room-temperature magnetoelectric coupling in nanocrystalline Na0.5Bi0.5TiO3
DOI:10.1063/1.4893720  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Ju, Lin;Shi, Changmin;Sun, Li;Zhang, Yongjia;Qin, Hongwei;Hu, Jifan;
7:1:109:5     Effect of excess Bi on structure and ferroelectric properties of polycrystalline BiFeO3 thin films
DOI:10.1016/j.tsf.2013.07.004  JN:THIN SOLID FILMS  PY:2013
  TC:4  AU: Yan, Jingdan;Gomi, Manabu;Hattori, Takashi;Yokota, Takeshi;Song, Huaihe;
7:1:109:6     Magnetoelectric coupling in nanocrystalline Pb0.82La0.18TiO3
DOI:10.1063/1.4732803  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Ju, Lin;Hu, Jifan;Sun, Li;Zhao, Minglei;Zhang, Yongjia;Qin, Hongwei;Mei, Liangmo;
7:1:109:7     The investigation of room temperature ferromagnetism in (1 0 0) oriented BaNb2O6 PLD films on LaAlO3 (1 0 0) substrate
DOI:10.1016/j.apsusc.2011.12.031  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:0  AU: Cao, Ensi;Zhang, Yongjia;Ju, Lin;Sun, Lihui;Qin, Hongwei;Hu, Jifan;
7:1:109:8     Ferroelectric Properties of BiFeO3 Thin Films Prepared via a Simple Chemical Solution Deposition
DOI:10.1080/00150193.2010.484368  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Gao Cheng;Meng Xiangjian;Sun Jinglan;Ma Jianhua;Lin Tie;Chu Junhao;
7:1:110:1     Synthesis of (K, Na) (Nb, Ta)O-3 lead-free piezoelectric ceramic powders by high temperature mixing method under hydrothermal conditions
DOI:10.1016/j.ceramint.2011.10.003  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:12  AU: Gu, Honghui;Zhu, Kongjun;Pang, Xuming;Shao, Bin;Qiu, Jinhao;Ji, Hongli;
7:1:110:2     Simple hydrothermal synthesis and sintering of Na0.5Bi0.5TiO3 nanowires
DOI:10.1016/j.jallcom.2011.07.034  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Jiang, Xiangping;Lin, Mei;Tu, Na;Chen, Chao;Zhou, Shulan;Zhan, Hongquan;
7:1:110:3     Randomly organized and self-assembled Na0.5Bi0.5TiO3 nanodots elaborated by sol-gel and pulsed laser deposition routes
DOI:10.1016/j.matlet.2013.06.021  JN:MATERIALS LETTERS  PY:2013
  TC:0  AU: Jean, F.;Duclere, J. -R.;Remondiere, F.;Boulle, A.;Deputier, S.;Coudert, V.;Guilloux-Viry, M.;
7:1:110:4     (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders
DOI:10.1016/j.matlet.2009.10.012  JN:MATERIALS LETTERS  PY:2010
  TC:31  AU: Maeda, Takafumi;Takiguchi, Norihito;Ishikawa, Mutstuo;Hemsel, Tobias;Morita, Takeshi;
7:1:110:5     (K, Na) NbO3 based piezoceramics prepared by a two-step calcining and ball milling route
DOI:10.1016/j.matlet.2014.03.027  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Gao, Renlong;Chu, Xiangcheng;Huan, Yu;Wang, Xiaohui;Li, Longtu;
7:1:110:6     Synthesis of Na0.5Bi0.5TiO3 powders through hydrothermal method
DOI:10.1016/j.jallcom.2009.09.144  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Lu, Tonglei;Dai, Jinhui;Tian, Jintao;Song, Wenwen;Liu, Xizhong;Lai, Lin;Chu, Huijuan;Huang, Xiang;Liu, Xiaoyun;
7:1:110:7     Hydrothermal Synthesis of Nanosized Na0.5Bi0.5TiO3
DOI:10.1111/j.1551-2916.2011.04698.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Setinc, Tina;Spreitzer, Matjaz;Logar, Manca;Suvorov, Danilo;
7:1:110:8     Size-Controlled Hydrothermal Synthesis of Bismuth Sodium and Bismuth Potassium Titanates Fine Particles and Application to Lead-Free Piezoelectric Ceramics
DOI:10.2320/matertrans.M2010419  JN:MATERIALS TRANSACTIONS  PY:2011
  TC:6  AU: Kanie, Kiyoshi;Numamoto, Yoshiki;Tsukamoto, Shintaro;Sasaki, Takafumi;Nakaya, Masafumi;Tani, Junji;Takahashi, Hirofumi;Muramatsu, Atsushi;
7:1:110:9     Hydrothermal synthesis of bismuth sodium titanate particles with different morphologies
DOI:10.1007/s10853-013-7491-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:0  AU: Ma, Xiao;Zhang, Wuxing;Xue, Lihong;Yin, Shengming;Wan, Li;Yan, Youwei;
7:1:110:10     Hydrothermal Synthesis of Sodium and Potassium Niobates Fine Particles and Their Application to Lead-Free Piezoelectric Material
DOI:10.2320/matertrans.M2011148  JN:MATERIALS TRANSACTIONS  PY:2011
  TC:1  AU: Kanie, Kiyoshi;Numamoto, Yoshiki;Tsukamoto, Shintaro;Takahashi, Hirofumi;Mizutani, Hideto;Terabe, Atsuki;Nakaya, Masafumi;Tani, Junji;Muramatsu, Atsushi;
7:1:111:1     Dielectric properties of Ba(Ti1-xSnx)O-3 ceramics in the paraelectric phase
DOI:10.1016/j.ceramint.2010.07.006  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:11  AU: Kajtoch, C.;
7:1:111:2     Study of Physical Properties of Ba(Ti1-2xFexNbx)O-3 Ceramics
DOI:10.1080/00150193.2014.892811  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kajtoch, C.;Bak, W.;Garbarz-Glos, B.;Ruebenbauer, K.;Blachowski, A.;Zietek, D.;Czeppe, T.;Mroczka, K.;
7:1:111:3     Influence of Sr and Zr Substitution on Dielectric Properties of (Ba1-xSrx)(Ti1-xZrx)O-3
DOI:10.1080/00150193.2014.892387  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kajtoch, C.;Bak, W.;Garbarz-Glos, B.;Stanuch, K.;Tejchman, W.;Mroczka, K.;Czeppe, T.;
7:1:111:4     Electrical Properties of (Ba1-xNax)(Ti1-xNbx)O-3 Ceramics
DOI:10.1080/00150193.2014.891919  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Bak, W.;
7:1:111:5     The Electrical Properties of Ba1-ySryZrxTi1-xO3 Solid Solution
DOI:10.1080/00150193.2011.623641  JN:FERROELECTRICS  PY:2011
  TC:6  AU: Garbarz-Glos, B.;Sitko, D.;Budziak, A.;Bormanis, K.;Antonova, M.;Klimkowski, G.;Smiga, W.;
7:1:111:6     Effect of Zr4+ Doping on the Electrical Properties of BaTiO3 Ceramics
DOI:10.1080/00150193.2011.578508  JN:FERROELECTRICS  PY:2011
  TC:9  AU: Garbarz-Glos, Barbara;Bormanis, Karlis;Sitko, Dorota;
7:1:111:7     Ultrasonication as a Method of Investigation of the Mechanical Properties of Doped Hafnium Barium Titanate
DOI:10.1080/10584587.2012.731349  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Garbarz-Glos, Barbara;Piekarczyk, Wojciech;Smeltere, Ilze;Smiga, Wlodzimierz;Antonova, Maija;
7:1:111:8     Characterization of Dielectric Anomaly in Solid Solution Based on BaTiO3
DOI:10.1080/00150193.2011.623644  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Sitko, D.;Garbarz-Glos, B.;Smiga, W.;Smeltere, I.;Kalvane, A.;Bormanis, K.;
7:1:111:9     Impedance and Modulus Spectroscopy of a Novel Ferroelectric Ceramics Based on Barium Titanate
DOI:10.1080/00150193.2014.891924  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Garbarz-Glos, B.;
7:1:111:10     Dielectric properties and phase transition of-samarium-doped BaSn0.1Ti0.9O3 ceramics
DOI:10.1016/j.ceramint.2012.11.031  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Li, Yuanliang;Ma, Xuegang;Li, Zhongqiu;Wang, Ranran;Zhang, Qingjun;Qu, Yuanfang;
7:1:111:11     Dielectric properties of calcium doped BaTi0.85Sn0.15O3: A diffuse phase transition
DOI:10.1016/j.matchemphys.2010.05.060  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:2  AU: Singh, Sindhu;Singh, Prabhakar;Parkash, Om;Kumar, Devendra;
7:1:111:12     Influence of Sr-Substitution on Diffuseness of (Ba1-xSrx)TiO3 Phase Transitions
DOI:10.1080/00150193.2011.578507  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Gabrys, M.;Kajtoch, C.;Bak, W.;Handke, B.;Starzyk, F.;
7:1:111:13     Influence of Sn-Substitution on the Phase Transitions Character in Polycrystalline (Ba0.90Sr0.10)(Ti1-ySny)O-3
DOI:10.1080/00150193.2014.892406  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kajtoch, C.;Bak, W.;Garbarz-Glos, B.;Zietek, D.;Gabrys, M.;Stanuch, K.;Czeppe, T.;
7:1:111:14     Influence of Zr-substitution on phase transitions character in polycrystalline Ba(Ti1-xZrx)O-3
DOI:10.1007/s10853-010-4948-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:5  AU: Kajtoch, C.;
7:1:111:15     Study of the Phase Transition in Polycrystalline Ba(Ti0.90Sn0.10)O-3
DOI:10.1080/00150193.2014.892405  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kajtoch, C.;Bak, W.;Garbarz-Glos, B.;
7:1:111:16     Effect of Variable Valence Ion Doping on the Dielectric Properties of BaTiO3-Based Materials
DOI:10.1080/00150193.2014.892810  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Bak, W.;Dulian, P.;Sitko, D.;Garbarz-Glos, B.;Kajtoch, C.;Wieczorek-Ciurowa, K.;Smeltere, I.;
7:1:111:17     Comparison of the Influences of a Perpendicular and Parallel Uniaxial Stress on the Dielectric and Ferroelectric Properties of Fe Doped BaTiO3 Ceramics
DOI:10.1080/00150193.2014.892383  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Sitko, D.;Suchanicz, J.;Garbarz-Glos, B.;Antonova, M.;Sternberg, A.;
7:1:111:18     Elastic Properties of Barium Zirconate Titanate Ceramics
DOI:10.1080/10584587.2011.570666  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Garbarz-Glos, B.;Bormanis, K.;Kalvane, A.;Jankowska-Sumara, I.;Budziak, A.;Suchanicz, W.;Smiga, W.;
7:1:112:1     Phase transitions and domain evolution in (Pb, La)(Zr, Sn, Ti)O-3 single crystal
DOI:10.1063/1.4755759  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Li, Yuanyuan;Li, Qiang;Yan, Qingfeng;Zhang, Yiling;Xi, Xiaoqing;Chu, Xiangcheng;Cao, Wenwu;
7:1:112:2     Growth and characterization of Pb0.97La0.02(Zr0.66Sn0.27Ti0.07)O-3 antiferroelectric single crystals
DOI:10.1007/s10853-012-6690-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Yang, Zi;Li, Qiang;Li, Yuanyuan;Zhang, Shaofeng;Wang, Lin;
7:1:112:3     Electric field induced metastable ferroelectric phase and its behavior in (Pb, La)(Zr, Sn, Ti)O-3 antiferroelectric single crystal near morphotropic phase boundary
DOI:10.1063/1.4864317  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Yuanyuan;Cao, Wenwu;Li, Qiang;Yan, Qingfeng;Gao, Jinghan;Zhuo, Fangping;Xi, Xiaoqing;Zhang, Yiling;Chu, Xiangcheng;
7:1:112:4     Fully inverted single-digit nanometer domains in ferroelectric films
DOI:10.1063/1.3280371  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Tayebi, Noureddine;Narui, Yoshie;Franklin, Nathan;Collier, C. Patrick;Giapis, Konstantinos P.;Nishi, Yoshio;Zhang, Yuegang;
7:1:112:5     Ultrahigh Currents in Dielectric-Coated Carbon Nanotube Probes
DOI:10.1021/nl4024808  JN:NANO LETTERS  PY:2013
  TC:3  AU: Lisunova, Yuliya;Levkivskyi, Ivan;Paruch, Patrycja;
7:1:112:6     Growth and characterization of (Pb, La)(Zr, Sn, Ti)O-3 single crystals
DOI:10.1016/j.jcrysgro.2010.11.042  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:10  AU: Li, Yuanyuan;Li, Qiang;Wang, Lin;Yang, Zi;Chu, Xiangcheng;
7:1:112:7     Web-like domain structure formation in barium titanate single crystals
DOI:10.1063/1.3467871  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Rodriguez, B. J.;Eng, L. M.;Gruverman, A.;
7:1:112:8     Poling field versus piezoelectric property for [001](c) oriented 91%Pb(Zn1/3Nb2/3)O-3-9%PbTiO3 single crystals
DOI:10.1007/s10853-010-5009-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:5  AU: Xiang, Yang;Zhang, Rui;Cao, Wenwu;
7:1:112:9     Dielectric and elastic properties of 0.70Pb(Mg1/3Nb2/3)O-3-0.30PbTiO(3) single crystal and their electric-field dependence
DOI:10.1007/s10853-011-5816-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Wang, Zhu;Zhang, Rui;Sun, Enwei;Cao, Wenwu;
7:1:112:10     High-pressure vertical Bridgman growth of lead magnesium niobate-lead titanate single crystal
DOI:10.1016/j.jcrysgro.2009.12.067  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:1  AU: Dhar, Romit;Tjossem, Russell;Lynn, Kelvin G.;
7:1:112:11     Contributions of domain wall motion to complex electromechanical coefficients of 0.62Pb(Mg1/3Nb2/3)O-3-0.38PbTiO(3) crystals
DOI:10.1063/1.3273484  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Wang, Zhu;Zhang, Rui;Sun, Enwei;Cao, Wenwu;
7:1:113:1     High density nanostructured BaTiO3 ceramics obtained under extreme conditions
DOI:10.1016/j.scriptamat.2012.02.044  JN:SCRIPTA MATERIALIA  PY:2012
  TC:6  AU: Alves, M. F. S.;Gotardo, R. A. M.;Cotica, L. F.;Santos, I. A.;Nascimento, W. J.;Garcia, D.;Eiras, J. A.;
7:1:113:2     Ferroic investigations in LuFe2O4 multiferroic ceramics
DOI:10.1063/1.3622147  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Viana, D. S. F.;Gotardo, R. A. M.;Cotica, L. F.;Santos, I. A.;Olzon-Dionysio, M.;Souza, S. D.;Garcia, D.;Eiras, Jose A.;Coelho, A. A.;
7:1:113:3     Variable-range-hopping conduction and dielectric relaxation in Pr0.6Sr0.4Mn0.6Ti0.4O3 +/- (delta) perovskite
DOI:10.1016/j.jmmm.2014.07.044  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:3  AU: Khadhraoui, S.;Triki, A.;Hcini, S.;Zemni, S.;Oumezzine, M.;
7:1:113:4     Application of spark plasma sintering to processing of dense Ba(Ti1-xSnx)O-3 (x=0.13) ceramic
DOI:10.1016/j.jallcom.2010.06.044  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: Aldica, Gheorghe;Cernea, Marin;Radu, Roxana;Trusca, Roxana;
7:1:113:5     The dielectric and electric properties of (Ba0.68-xSr0.311Bi0.006Mgx)(Ti0.99Sn0.01)O-3 ceramics
DOI:10.1016/j.jallcom.2010.11.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:1  AU: Xu, Shiguo;Qu, Yuanfang;Yang, Dean;
7:1:113:6     Processing and luminescence properties of Ce:Y3Al5O12 and Eu:Y3Al5O12 ceramics for white-light applications
DOI:10.1016/j.matlet.2012.08.106  JN:MATERIALS LETTERS  PY:2012
  TC:4  AU: Silveira, L. G. D.;Cotica, L. F.;Santos, I. A.;Belancon, M. P.;Rohling, J. H.;Baesso, M. L.;
7:1:113:7     Dielectric Ba(Ti1-x Sn (x) )O-3 (x=0.13) ceramics, sintered by spark plasma and conventional methods
DOI:10.1007/s10853-010-4234-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:6  AU: Aldica, Gheorghe;Cernea, Marin;Ganea, Paul;
7:1:113:8     Dielectric investigations in unconventionally processed TbMnO3 ceramics
DOI:10.1016/j.scriptamat.2012.10.045  JN:SCRIPTA MATERIALIA  PY:2013
  TC:2  AU: Gotardo, Ricardo A. M.;Zabotto, Fabio L.;Garcia, Ducinei;Eiras, Jose A.;Dias, Gustavo S.;Cotica, Luiz F.;Santos, Ivair A.;Coelho, Adelino A.;
7:1:113:9     Ferroelectric, piezoelectric and electrostrictive properties of Ba(Ti1-xSnx)O-3 ceramics obtained from nanocrystalline powder
DOI:10.1016/j.mseb.2010.04.039  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:5  AU: Nath, A. K.;Singh, K. Chandramani;Laishram, Radhapiyari;Thakur, O. P.;
7:1:113:10     Magnetic states and valence fluctuations in charge frustrated polycrystalline lutetium ferrite samples
DOI:10.1016/j.scriptamat.2013.07.027  JN:SCRIPTA MATERIALIA  PY:2013
  TC:0  AU: Viana, D. S. F.;Garcia, D.;Eiras, Jose A.;Olzon-Dionysio, M.;Souza, S. D.;Montanher, D. Z.;Cotica, L. F.;Santos, I. A.;Coelho, A. A.;Gotardo, R. A. M.;
7:1:113:11     Structural and impedance spectroscopy properties of Pr0.6Sr0.4Mn1-xTixO3 +/-delta perovskites
DOI:10.1016/j.jallcom.2013.05.144  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Khadhraoui, S.;Triki, A.;Hcini, S.;Zemni, S.;Oumezzine, M.;
7:1:113:12     Microstructure of Ba1-xLaxTiO3-delta ceramics sintered by Spark Plasma Sintering
DOI:10.1016/j.jeurceramsoc.2011.01.004  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: El Horr, N.;Valdez-Nava, Z.;Tenailleau, C.;Guillemet-Fritsch, S.;
7:1:114:1     Phase Transformation Behavior and Electrical Properties of Pb(Zr0.56Ti0.44)O3-Bi(Zn0.5Ti0.5)O3 Solid Solution Ceramics
DOI:10.1111/j.1551-2916.2011.04699.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Zuo, Ruzhong;Liu, Yi;Su, Shi;Chu, Xiangcheng;Wang, Xiaohui;
7:1:114:2     Normal-Relaxor-Diffuse Ferroelectric Phase Transition and Electrical Properties of Bi(Mg1/2Ti1/2)3-PbZrO3-PbTiO3 Solid Solution Ceramics Near the Morphotropic Phase Boundary
DOI:10.1111/jace.12874  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Yi, Haifeng;Zuo, Ruzhong;
7:1:114:3     The morphotropic phase boundary in the (1-x)PbZrO(3)x[0.3Bi(Zn1/2Ti1/2)O-3-0.7PbTiO(3)] perovskite solid solution
DOI:10.1007/s10853-011-5961-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:1  AU: Sareein, T.;Hu, W.;Tan, X.;Yimnirun, R.;
7:1:114:4     Bi(Zn0.5Ti0.5)O3 Substitution Effects in Pb(Zr,Ti)O3 Piezoelectric Ceramics Around Morphotropic Phase Boundary Region
DOI:10.1080/00150191003676579  JN:FERROELECTRICS  PY:2010
  TC:7  AU: Lee, S. C.;Wang, L.;Lee, M. H.;Sung, Y. S.;Kim, M. -H.;Song, T. K.;Kim, S. S.;Cho, J. H.;Choi, B. C.;Choi, K. S.;Sakka, Y.;
7:1:114:5     Electrical properties and x-ray photoelectron spectroscopy studies of Bi(Zn0.5Ti0.5)O-3 doped Pb(Zr0.4Ti0.6)O-3 thin films
DOI:10.1063/1.3499305  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Tang, M. H.;Zhang, J.;Xu, X. L.;Funakubo, H.;Sugiyama, Y.;Ishiwara, H.;Li, J.;
7:1:114:6     Structural and electrical characterizations of Bi(Zn0.5Ti0.5)O-3 doped lead zirconate titanate ferroelectric films with enhanced ferroelectric properties
DOI:10.1016/j.tsf.2012.07.024  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Tang, Minghua;Jiang, Bo;Zhang, Wei;Xiao, Yongguang;Zhou, Yichun;He, John;Ouyang, Jun;
7:1:114:7     Piezoelectric Properties of Pb0.85Bi0.15(Zr0.442Ti0.483Zn0.075)O-3 Ceramics
DOI:10.1080/00150193.2010.484987  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Wang, Tingting;Yu, Jian;
7:1:114:8     Morphotropic phase boundary in high temperature ferroelectric xBi(Zn1/2Ti1/2)O-3-yPbZrO(3)-zPbTiO(3) perovskite ternary solid solution
DOI:10.1016/j.matlet.2011.01.070  JN:MATERIALS LETTERS  PY:2011
  TC:4  AU: Dwivedi, Akansha;Randall, Clive A.;
7:1:114:9     A Phenomenological Approach to Phase Transition Temperatures of Pb(Zr,Ti)O-3-BiFeO3 System
DOI:10.1080/00150193.2013.838139  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Park, J. S.;Song, T. K.;Kim, M. -H.;Kim, W. -J.;Do, D.;Kim, S. S.;Choi, K. S.;
7:1:114:10     Effect of Bi(B)O-3 perovskite substitution on enhanced tetragonality and ferroelectric transition temperature in Pb(Zr,Ti)O-3 ceramics
DOI:10.1016/j.matchemphys.2011.04.018  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:3  AU: Wang, Lin;Song, Tae Kwon;Lee, Sung Chan;Cho, Jong Ho;Sakka, Yoshio;
7:1:114:11     Dielectric and structural characterization of high-temperature ferroelectric xBi(Zn1/2Ti1/2)O-3-yPbZrO(3)-zPbTiO(3) perovskite ternary solid solution
DOI:10.1063/1.3553874  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Dwivedi, Akansha;Randall, Clive A.;
7:1:114:12     Phase Transition and Dielectric Properties of PNNZT-BNLT Ceramics
DOI:10.1080/00150193.2013.839293  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Butnoi, Pichitchai;Pisitpipathsin, Nuttapon;Kantha, Puripat;Bintachitt, Patamas;Pengpat, Kamonpan;
7:1:115:1     Grain Size Effects on the Ferroelectric and Piezoelectric Properties of Na0.5K0.5NbO3 Ceramics Prepared by Pechini Method
DOI:10.1111/j.1551-2916.2011.04992.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:18  AU: Huo, Shaoxin;Yuan, Songliu;Tian, Zhaoming;Wang, Chuanhui;Qiu, Yang;
7:1:115:2     Influence of A-site non-stoichiometry on structure and electrical properties of K0.5Na0.5NbO3-based lead-free piezoelectric ceramics
DOI:10.1016/j.scriptamat.2010.03.033  JN:SCRIPTA MATERIALIA  PY:2010
  TC:13  AU: Liu, S. J.;Wan, B.;Wang, P.;Song, S. -H.;
7:1:115:3     Synthesis and properties of high aspect ratio SrBi4Ti4O15 microplatelets
DOI:10.1016/j.matlet.2014.05.014  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Chang, Yunfei;Wu, Jie;Yang, Bin;Zhang, Shantao;Lv, Tianquan;Cao, Wenwu;
7:1:115:4     Improved ferroelectric and pyroelectric properties of Pb-doped SrBi4Ti4O15 ceramics for high temperature applications
DOI:10.1016/j.jallcom.2013.08.181  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Ramana, E. Venkata;Graca, M. P. F.;Valente, M. A.;Sankaram, T. Bhima;
7:1:115:5     0.94(K0.5Na0.5)NbO3-0.06LiNbO(3) piezoelectric ceramics prepared from the solid state reaction modified with polyvinylpyrrolidone (PVP) of different molecular weights
DOI:10.1016/j.ceramint.2011.11.021  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Tan, Chee Kiang Ivan;Yao, Kui;Goh, Phoi Chin;Ma, Jan;
7:1:115:6     Effects of Ultrasonic Irradiation on the Structural and Electrical Properties of Lead-Free 0.94(K0.5Na0.5)NbO3-0.06LiNbO(3) Ceramics
DOI:10.1111/j.1551-2916.2010.04138.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Tan, Chee Kiang Ivan;Yao, Kui;Ma, Jan;
7:1:115:7     Studies of Ferroelectric and Dielectric Properties of Samarium Doped Barium Titanate Sintered in Pure Nitrogen
DOI:10.1080/00150193.2010.484768  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Hao, Yingbin;Li, Yanxia;Yao, Xi;Wang, Xusheng;
7:1:115:8     Effect of Simultaneous Substitution of Sm and Pr Ions on Dielectric and Ferroelectric Properties of Strontium Bismuth Titanate
DOI:10.1080/00150193.2013.814313  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Padamavathi, S. N.;Devi, Ch. Sameera;Vithal, M.;Prasad, G.;Kumar, G. S.;
7:1:115:9     PVP-Mediated Crystallization of Perovskite Phase in the PMN-PT Thin Films Prepared by Sol-Gel Processing
DOI:10.1111/j.1551-2916.2009.03460.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:2  AU: Du, Zehui H.;Zhang, Tianshu S.;Zhu, Minmin M.;Ma, Jan;
7:1:115:10     Thermal properties of Er:Li2TiGeO5 fenoelastic ceramics
DOI:10.1016/j.ceramint.2013.12.155  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Sieradzki, A.;Szewczyk, D.;Gagor, A.;Poprawski, R.;Jezowski, A.;
7:1:115:11     Crystallization of Pb((Zn,Mg)(1/3)Nb-2/3)O-3-PbTiO3 Thin Films Via Immobilization of Pb2+Ions During Sol-Gel Process
DOI:10.1111/j.1551-2916.2010.03988.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:1  AU: Du, Zehui;Zhu, Minmin;Zhang, Tianshu;Ma, Jan;
7:1:116:1     Dielectric investigations in nanostructured tetragonal BaTiO3 ceramics
DOI:10.1016/j.materresbull.2013.01.009  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Silveira, L. G. D.;Alves, M. F. S.;Cotica, L. F.;Gotardo, R. A. M.;Nascimento, W. J.;Garcia, D.;Eiras, J. A.;Santos, I. A.;
7:1:116:2     A Phenomenological Model on Phase Transitions in Nanocrystalline Barium Titanate Ceramic
DOI:10.1111/j.1551-2916.2010.03900.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Sun, Tieyu;Wang, Xiaohui;Wang, Han;Zhang, Xiaoquan;Cheng, Zhida;Sun, Chang Q.;Li, Longtu;
7:1:116:3     Dielectric Response of BaTiO3 Thin Film with Grain Size at Nanometer Scale
DOI:10.1111/j.1551-2916.2011.04950.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Tyunina, M.;Malic, B.;Plekh, M.;Kosec, M.;
7:1:116:4     Effects of oxygen vacancies and grain sizes on the dielectric response of BaTiO3
DOI:10.1063/1.3508947  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Choi, Youn-Kyu;Hoshina, Takuya;Takeda, Hiroaki;Teranishi, Takeshi;Tsurumi, Takaaki;
7:1:116:5     Origin of the dielectric response in Ba0.767Ca0.233TiO3
DOI:10.1063/1.3693524  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Shimizu, Takao;Fu, Desheng;Taniguchi, Hiroki;Taniyama, Tomoyasu;Itoh, Mitsuru;
7:1:116:6     Investigation of orthorhombic-to-tetragonal structural phase transition in (Ba1-xCax)(Zr0.05Ti0.95)O-3 ferroelectric ceramics using micro-Raman scattering
DOI:10.1063/1.4863303  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Singh, Gurvinderjit;Sathe, Vasant;Tiwari, V. S.;
7:1:116:7     Effect of mechanical stress on phase stability and polarization states in ferroelectric barium titanate and lead titanate
DOI:10.1016/j.ceramint.2013.11.123  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Zhu, Dongmei;Ma, Wenhui;
7:1:116:8     Dependence of the conductivity of polycrystalline Li0.33BaxLa0.56-2/3xTiO3 on Ba loading
DOI:10.1016/j.ssi.2014.05.001  JN:SOLID STATE IONICS  PY:2014
  TC:0  AU: Teranishi, Takashi;Kouchi, Akane;Hayashi, Hidetaka;Kishimoto, Akira;
7:1:116:9     Influence of film thickness and deposition rate on surface quality of polyparylene coatings
DOI:10.1116/1.4740049  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2012
  TC:2  AU: Schamberger, Florian;Ziegler, Astrid;Franz, Gerhard;
7:1:116:10     Broadband spectroscopy of the complex conductivity of polycrystalline yttria-stabilized zirconia
DOI:10.1016/j.mseb.2011.09.039  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:1  AU: Teranishi, Takashi;Hayashi, Hidetaka;Kishimoto, Akira;Tsurumi, Takaaki;
7:1:116:11     Lithium ion conductivity of Nd-doped (Li, La)TiO3 ceramics
DOI:10.1016/j.ssi.2013.04.014  JN:SOLID STATE IONICS  PY:2013
  TC:1  AU: Teranishi, Takashi;Yamamoto, Michihiro;Hayashi, Hidetaka;Kishimoto, Akira;
7:1:116:12     Dielectric strength of voidless BaTiO3 films with nano-scale grains fabricated by aerosol deposition
DOI:10.1063/1.4851675  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Kim, Hong-Ki;Lee, Seung-Hwan;Kim, Soo In;Lee, Chang Woo;Yoon, Jung Rag;Lee, Sung-Gap;Lee, Young-Hie;
7:1:116:13     Evaporation and thermal cracking of dimeric parylenes
DOI:10.1116/1.4816942  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2013
  TC:1  AU: Franz, Gerhard;Schamberger, Florian;
7:1:117:1     Hydrothermal synthesis of BaTiO3 from different Ti-precursors and microstructural and electrical properties of sintered samples with submicrometric grain size
DOI:10.1016/j.ceramint.2011.03.032  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:11  AU: Avila, H. A.;Ramajo, L. A.;Reboredo, M. M.;Castro, M. S.;Parra, R.;
7:1:117:2     Microwave-hydrothermal synthesis of barium strontium titanate nanoparticles
DOI:10.1016/j.jallcom.2010.08.143  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:16  AU: Simoes, A. Z.;Moura, F.;Onofre, T. B.;Ramirez, M. A.;Varela, J. A.;Longo, E.;
7:1:117:3     Influence of reactant type on the Sr incorporation grade and structural characteristics of Ba1-xSrxTiO3 (x=0-1) grown by sol-gel-hydrothermal synthesis
DOI:10.1016/j.ceramint.2013.04.070  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:12  AU: Fuentes, S.;Chavez, E.;Padilla-Campos, L.;Diaz-Droguett, D. E.;
7:1:117:4     Dielectric properties of Barium Strontium Titanate (BST) ceramics synthesized by using mixed-phase powders calcined at varied temperatures
DOI:10.1016/j.matlet.2012.02.045  JN:MATERIALS LETTERS  PY:2012
  TC:15  AU: Li, Juan;Jin, Dengren;Zhou, Lixin;Cheng, Jinrong;
7:1:117:5     Chemical and structural analysis related to defects in nanocrystalline Ba1-xSrxTiO3 grown via hydrothermal sol-gel
DOI:10.1016/j.ceramint.2013.09.134  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Fuentes, S.;Cespedes, F.;Padilla-Campos, L.;Diaz-Droguett, D. E.;
7:1:117:6     Investigation on the dielectric properties of (Ba, Sr)TiO3 thin films on hybrid electrodes
DOI:10.1016/j.matchemphys.2009.12.035  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:4  AU: Wang, Jinzhao;Zhang, Tianjin;Pan, Runkun;Jiang, Juan;Ma, Zhijun;Xiang, Chao;
7:1:117:7     Low-Temperature Sintering of Ba0.5Sr0.5TiO3-SrMoO4 Dielectric Tunable Composite Ceramics for LTCC Applications
DOI:10.1007/s11664-013-2621-0  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:3  AU: Tang, Linjiang;Wang, Jinwen;Zhai, Jiwei;
7:1:117:8     Compositionally inhomogeneous Ti-excess barium strontium titanate ceramics with a robust dielectric temperature stability
DOI:10.1016/j.matlet.2014.07.127  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Dong, Hanting;Jin, Dengren;Xie, Chaojun;Cheng, Jinrong;Zhou, Lixin;Chen, Jianguo;
7:1:117:9     Large-scale synthesis of nanocrystals of barium titanate and other titanates through solution-phase processes
DOI:10.1016/j.materresbull.2010.06.032  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:3  AU: Chen, Chen;Li, Chao;Su, Qiao;Peng, Qing;
7:1:117:10     Sintering and dielectric properties of BaTiO3 prepared by a composite-hydroxide-mediated approach
DOI:10.1016/j.materresbull.2010.06.054  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:1  AU: Xie, Yahong;Yin, Shu;Hashimoto, Takatoshi;Tokano, Yuichi;Sasaki, Atsushi;Sato, Tsugio;
7:1:117:11     X-ray diffraction and surface acoustic wave analysis of BST/Pt/TiO2/SiO2/Si thin films
DOI:10.1063/1.3662188  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Mseddi, Souhir;Njeh, Anouar;Schneider, Dieter;Fuess, Hartmut;Ben Ghozlen, Mohamed Hedi;
7:1:117:12     Microwave Property of Low-Temperature-Sintered Ba1-xSrxTiO3 Ceramics with B-Li Glass Sintering Aid
DOI:10.1080/00150191003744492  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Jiang, Haitao;Zhai, Jiwei;Chou, Xiujian;Yao, Xi;
7:1:118:1     Fast synthesis of NaNbO3 and K0.5Na0.5NbO3 by microwave hydrothermal method
DOI:10.1016/j.ceramint.2014.06.065  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Lopez-Juarez, Rigoberto;Castaneda-Guzman, R.;Villafuerte-Castrejon, M. E.;
7:1:118:2     Hydrothermal synthesis of NaNbO3 with low NaOH concentration
DOI:10.1016/j.ceramint.2009.11.006  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:15  AU: Wu, Shu Ya;Liu, Xiao Qiang;Chen, Xiang Ming;
7:1:118:3     Hydrothermal synthesis and electrical properties of NaNbO3
DOI:10.1016/j.materresbull.2012.11.046  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:5  AU: Boukriba, M.;Sediri, F.;Gharbi, N.;
7:1:118:4     Properties of NaNbO3 powders and ceramics prepared by hydrothermal reaction
DOI:10.1016/j.matchemphys.2010.11.042  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:5  AU: Pan, Hong;Zhu, Gui-sheng;Chao, Xiao-lian;Wei, Ling-ling;Yang, Zupei;
7:1:118:5     Solid-state reaction synthesis of sodium niobate (NaNbO3) powder at low temperature
DOI:10.1007/s10853-009-4098-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:10  AU: Chaiyo, Nopsiri;Boonchom, Banjong;Vittayakorn, Naratip;
7:1:118:6     Large-scale fabrication of H-2(H2O)Nb2O6 and Nb2O5 hollow microspheres
DOI:10.1016/j.materresbull.2009.12.007  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:10  AU: Liu, Meinan;Xue, Dongfeng;
7:1:118:7     Facile Synthesis of Lead-Free Piezoelectric Sodium Niobate (NaNbO3) Powders via the Solution Combustion Method
DOI:10.1080/00150193.2011.577374  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Chaiyo, Nopsiri;Ruangphanit, Anucha;Boonchom, Banjong;Vittayakorn, Naratip;
7:1:118:8     Synthesis of lamellar niobic acid nanorods via proton-exchange and their conversion to T-Nb2O5 nanorods
DOI:10.1016/j.ceramint.2011.06.054  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Xu, C. Y.;Liu, Y. Z.;Zhen, L.;
7:1:118:9     Polymorphology of sodium niobate based on two different bidentate organics
DOI:10.1016/j.materresbull.2009.12.003  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:11  AU: Ji, Liang;Liu, Meinan;Xue, Dongfeng;
7:1:118:10     Flower-like nanostructure MNb2O6 (M = Mn, Zn) with high surface area: Hydrothermal synthesis and enhanced photocatalytic performance
DOI:10.1016/j.matetresbull.2013.12.033  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Huang, Xue;Jing, Yan;Yang, Jia;Ju, Jing;Cong, Rihong;Gao, Wenliang;Yang, Tao;
7:1:118:11     Two-step Synthesis of Platelike Potassium Sodium Niobate Template Particles by Hydrothermal Method
DOI:10.1111/jace.12345  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Bai, Shan;Karaki, Tomoaki;
7:1:118:12     Low-temperature synthesis of ZnNb2O6 powders via hydrothermal method
DOI:10.1016/j.ceramint.2011.08.050  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Dai, Jinhui;Zhang, Chao;Shi, Leiyan;Song, Wenwen;Wu, Pingwei;Huang, Xiang;
7:1:118:13     Microwave Hydrothermal Synthesis and Piezoelectric Properties Investigation of K0.5Na0.5NbO3 Lead-Free Ceramics
DOI:10.1080/00150193.2010.482433  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Zhou, Yuan;Yu, Jiuli;Guo, Min;Zhang, Mei;
7:1:119:1     Temperature and driving field dependence of fatigue processes in PZT bulk ceramics
DOI:10.1016/j.actamat.2011.06.017  JN:ACTA MATERIALIA  PY:2011
  TC:20  AU: Glaum, Julia;Granzow, Torsten;Schmitt, Ljubomira Ana;Kleebe, Hans-Joachim;Roedel, Juergen;
7:1:119:2     Fatigue and failure responses of lead zirconate titanate multilayer actuator under unipolar high-field electric cycling
DOI:10.1063/1.4813219  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Zeng, Fan Wen;Wang, Hong;Lin, Hua-Tay;
7:1:119:3     Bipolar and unipolar electrical fatigue in ferroelectric lead zirconate titanate thin films: An experimental comparison study
DOI:10.1063/1.3463318  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Lou, X. J.;Wang, J.;
7:1:119:4     Fatigue responses of lead zirconate titanate stacks under semibipolar electric cycling with mechanical preload
DOI:10.1063/1.3486469  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Wang, Hong;Cooper, Thomas A.;Lin, Hua-Tay;Wereszczak, Andrew A.;
7:1:119:5     Residual stress relief due to fatigue in tetragonal lead zirconate titanate ceramics
DOI:10.1063/1.4812326  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Hall, D. A.;Mori, T.;Comyn, T. P.;Ringgaard, E.;Wright, J. P.;
7:1:119:6     Fatigue of extracted lead zirconate titanate multilayer actuators under unipolar high field electric cycling
DOI:10.1063/1.4904352  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Wang, Hong;Lee, Sung-Min;Wang, James L.;Lin, Hua-Tay;
7:1:119:7     Piezoelectric and dielectric performance of poled lead zirconate titanate subjected to electric cyclic fatigue
DOI:10.1088/0964-1726/21/2/025009  JN:SMART MATERIALS & STRUCTURES  PY:2012
  TC:7  AU: Wang, Hong;Matsunaga, Tadashi;Lin, Hua-Tay;Mottern, Alexander M.;
7:1:119:8     Effect of polarization fatigue on the Rayleigh coefficients of ferroelectric lead zirconate titanate thin films: Experimental evidence and implications
DOI:10.1063/1.4895616  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Lou, X. J.;Zhang, H. J.;Luo, Z. D.;Zhang, F. P.;Liu, Y.;Liu, Q. D.;Fang, A. P.;Dkhil, B.;Zhang, M.;Ren, X. B.;He, H. L.;
7:1:120:1     Composition dependence of dispersion and bandgap properties in PZN-xPT single crystals
DOI:10.1063/1.3654142  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:25  AU: He, Chongjun;Xu, Feng;Wang, Jiming;Du, Chaoling;Zhu, Kongjun;Liu, Youwen;
7:1:120:2     Structural, dielectric and optical properties of sol-gel synthesized 0.55Ba(Zr0.2Ti0.8)O-3-0.45(Ba0.7Ca0.3)TiO3 ceramic
DOI:10.1007/s00339-014-8482-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Rani, Jyoti;Yadav, K. L.;Prakash, Satya;
7:1:120:3     Optical dispersion and interband transition in Na0.5Bi0.5TiO3-x%BaTiO3 lead-free relaxor ferroelectric single crystals
DOI:10.1063/1.4807791  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Zhang, Haiwu;Zhang, Qinhui;Zhao, Xiangyong;Li, Xiaobing;Wang, Dong;Luo, Haosu;
7:1:120:4     Photoluminescence and electrical properties of Eu-doped (Na0.5Bi0.5)TiO3 ferroelectric single crystals
DOI:10.1007/s00339-013-8176-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Zhang, Haiwu;Zhao, Xiangyong;Deng, Hao;Chen, Chao;Lin, Di;Li, Xiaobing;Yan, Jun;Luo, Haosu;
7:1:120:5     Complex impedance studies of low temperature synthesized fine grain PZT/CeO2 nanocomposites
DOI:10.1016/j.ceramint.2011.12.002  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Goel, Puja;Vijayan, N.;Biradar, Ashok M.;
7:1:120:6     Temperature-dependent Urbach tail measurements of lutetium aluminum garnet single crystals
DOI:10.1103/PhysRevB.81.155109  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Letz, M.;Gottwald, A.;Richter, M.;Liberman, V.;Parthier, L.;
7:1:120:7     Nanotwin domains in high-strain ferroelectric 89.5%Pb(Zn1/3Nb2/3)O-3-10.5%PbTiO3 single crystal
DOI:10.1063/1.3505638  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Chang, W. S.;Lim, L. C.;Yang, P.;Ku, C. -S.;Lee, H. -Y.;Tu, C. -S.;
7:1:120:8     Effects of capping HfO2 with multivalent oxides toward reducing the number of charged defects
DOI:10.1063/1.3409222  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Umezawa, Naoto;
7:1:120:9     Comparative characterization of rhombohedral and tetragonal PZN-PT single crystals
DOI:10.1063/1.3599587  JN:AIP ADVANCES  PY:2011
  TC:2  AU: Kobor, D.;Tine, M.;Hajjaji, A.;Lebrun, L.;Pruvost, S.;Guyomar, D.;
7:1:120:10     Complex Impedance Study of Fine and Coarse Grain TiO2 Ceramics
DOI:10.1111/j.1551-2916.2010.04008.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Chao, Sheng;Petrovsky, Vladimir;Dogan, Fatih;
7:1:121:1     Optical near-field absorption at a metal tip far from plasmonic resonance
DOI:10.1103/PhysRevB.81.125411  JN:PHYSICAL REVIEW B  PY:2010
  TC:23  AU: Houard, J.;Vella, A.;Vurpillot, F.;Deconihout, B.;
7:1:121:2     Numerical study of femtosecond laser-assisted atom probe tomography
DOI:10.1007/s00339-012-7189-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:10  AU: Silaeva, E. P.;Shcheblanov, N. S.;Itina, T. E.;Vella, A.;Houard, J.;Sevelin-Radiguet, N.;Vurpillot, F.;Deconihout, B.;
7:1:121:3     Three-dimensional thermal response of a metal subwavelength tip under femtosecond laser illumination
DOI:10.1103/PhysRevB.84.033405  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Houard, J.;Vella, A.;Vurpillot, F.;Deconihout, B.;
7:1:121:4     Laser-assisted field evaporation from insulators triggered by photoinduced hole accumulation
DOI:10.1103/PhysRevB.86.195430  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Tamura, H.;Tsukada, M.;McKenna, K. P.;Shluger, A. L.;Ohkubo, T.;Hono, K.;
7:1:121:5     Evidence of lateral heat transfer during laser assisted atom probe tomography analysis of large band gap materials
DOI:10.1063/1.3622647  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Bachhav, M. N.;Danoix, R.;Vurpillot, F.;Hannoyer, B.;Ogale, S. B.;Danoix, F.;
7:1:121:6     Antenna effect in laser assisted atom probe tomography: How the field emitter aspect ratio can enhance atomic scale imaging
DOI:10.1063/1.4757884  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Arnoldi, L.;Vella, A.;Houard, J.;Deconihout, B.;
7:1:121:7     Polarization dependence of the optical absorption of a subwavelength tip
DOI:10.1016/j.apsusc.2012.01.051  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:4  AU: Vella, A.;Sevelin-Radiguet, N.;Houard, J.;Deconihout, B.;
7:1:121:8     Field evaporation mechanism of bulk oxides under ultra fast laser illumination
DOI:10.1063/1.3610523  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Vella, A.;Mazumder, B.;Da Costa, G.;Deconihout, B.;
7:1:121:9     Surface carrier recombination of a silicon tip under high electric field
DOI:10.1063/1.3473816  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Mazumder, B.;Vella, A.;Vurpillot, F.;Martel, G.;Deconihout, B.;
7:1:121:10     Energy deficit of pulsed-laser field-ionized and field-emitted ions from non-metallic nano-tips
DOI:10.1063/1.4879315  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Arnoldi, L.;Silaeva, E. P.;Gaillard, A.;Vurpillot, F.;Blum, I.;Rigutti, L.;Deconihout, B.;Vella, A.;
7:1:121:11     In-situ observation of non-hemispherical tip shape formation during laser-assisted atom probe tomography
DOI:10.1063/1.3592339  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Koelling, S.;Innocenti, N.;Schulze, A.;Gilbert, M.;Kambham, A. K.;Vandervorst, W.;
7:1:121:12     Impact of the apex of an elongated dielectric tip upon its light absorption properties
DOI:10.1016/j.apsusc.2013.10.150  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Bogdanowicz, J.;Gilbert, M.;Koelling, S.;Vandervorst, W.;
7:1:122:1     Properties of the BaTiO3 coating prepared by supersonic plasma spraying
DOI:10.1016/j.jallcom.2013.08.036  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Xing Zhiguo;Wang Haidou;Zhu Lina;Zhou Xinyuan;Huang Yanfei;
7:1:122:2     Boundary faceting-dependent densification in a BaTiO3 model system
DOI:10.1016/j.actamat.2010.10.007  JN:ACTA MATERIALIA  PY:2011
  TC:8  AU: Lee, Min-Gon;Chung, Sung-Yoon;Kang, Suk-Joong L.;
7:1:122:3     Structure and properties of plasma sprayed BaTiO3 coatings: Spray parameters versus structure and photocatalytic activity
DOI:10.1016/j.ceramint.2011.04.003  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:10  AU: Ctibor, Pavel;Ageorges, Helene;Stengl, Vaclav;Murafa, Nataliya;Pis, Igor;Zahoranova, Tatiana;Nehasil, Vaclav;Pala, Zdenek;
7:1:122:4     Effect of post annealing on structural, optical and dielectric properties of MgTiO3 thin films deposited by RF magnetron sputtering
DOI:10.1016/j.apsusc.2012.09.168  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:6  AU: Kumar, T. Santhosh;Bhuyan, R. K.;Pamu, D.;
7:1:122:5     Structure and properties of plasma sprayed BaTiO3 coatings
DOI:10.1016/j.ceramint.2010.05.016  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:13  AU: Ctibor, Pavel;Ageorges, Helene;Sedlacek, Josef;Ctvrtlik, Radim;
7:1:122:6     Improving dielectric properties of plasma sprayed calcium titanate (CaTiO3) coatings by thermal annealing
DOI:10.1016/j.ceramint.2014.04.168  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Kotlan, Jiri;Ctibor, Pavel;Pala, Zdenek;Homola, Petr;Nehasil, Vaclav;
7:1:122:7     Chemical solution deposition of multiferroic La0.7Sr0.3MnO3, BaTiO3 thin films prepared by ink plotting
DOI:10.1016/j.jallcom.2011.11.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Kirchner, A.;Arin, M.;Lommens, P.;Granados, X.;Ricart, S.;Holzapfel, B.;Van Driessche, I.;
7:1:122:8     Structural and magnetic characterization of LaSrMnO3 thin films deposited by laser ablation on MgO substrates
DOI:10.1016/j.jmmm.2009.06.072  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:10  AU: Gomes, I. T.;Almeida, B. G.;Lopes, A. M. L.;Araujo, J. P.;Barbosa, J.;Mendes, J. A.;
7:1:122:9     Phase stabilization in plasma sprayed BaTiO3
DOI:10.1016/j.ceramint.2012.11.102  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Ctibor, P.;Seiner, H.;Sedlacek, J.;Pala, Z.;Vanek, P.;
7:1:122:10     Electromechanical properties of Ba(Zr0.2Ti0.8)O-3 ceramics prepared by spark plasma sintering
DOI:10.1016/j.ceramint.2011.04.087  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Maiwa, Hiroshi;
7:1:123:1     Effect of the Reoxidation on Positive Temperature Coefficient Behavior of BaTiO3-Bi0.5Na0.5TiO3
DOI:10.1111/j.1551-2916.2009.03562.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:17  AU: Wei, Jifeng;Pu, Yongping;Mao, Yuqin;Wang, Jinfei;
7:1:123:2     Fabrication of high Tc BaTiO3-Bi0.5Na0.5TiO3 positive temperature coefficient of resistivity ceramics using the sol-gel method
DOI:10.1016/j.matlet.2013.01.052  JN:MATERIALS LETTERS  PY:2013
  TC:5  AU: Li, Hailong;Yang, De'an;Qu, Yuanfang;
7:1:123:3     Effect of sintering procedure on the resistivity of (1-x)BaTiO3-x(Bi0.5Na0.5) TiO3 ceramics
DOI:10.1016/j.jallcom.2010.08.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Liu, Ming-Long;Yang, De-An;Qu, Yuan-Fang;
7:1:123:4     Influences of Ba/Ti Ratios on the Positive Temperature Coefficient of Resistivity Effect of Y-Doped BaTiO3-(Bi1/2Na1/2)TiO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04506.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Leng, Senlin;Li, Guorong;Zheng, Liaoying;Cheng, Lihong;Zeng, Jiangtao;
7:1:123:5     Effect of the Nb2O5 content on electrical properties of lead-free BaTiO3-Bi0.5Na0.5TiO3 ceramics
DOI:10.1016/j.ceramint.2013.03.013  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Li, Hailong;Kang, Jianning;Guo, Feng;Qu, Yuanfang;Yang, De'an;
7:1:123:6     Rising Tc in Bi and Cu co-doped BaTiO3
DOI:10.1016/j.matlet.2009.11.021  JN:MATERIALS LETTERS  PY:2010
  TC:11  AU: Kumada, Nobuhiro;Ogiso, Hideyuki;Shiroki, Keiko;Wada, Satoshi;Yonesaki, Yoshinori;Takei, Takahiro;Kinomura, Nobukazu;
7:1:123:7     Effects of different bismuth-based compounds additives on the positive temperature coefficient effect of BaTiO3 ceramics
DOI:10.1016/j.matlet.2012.07.017  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Yuan, Qibin;Pu, Yongping;Cao, Botao;
7:1:123:8     Study of electrical and dielectric properties of Y2O3 doped Ba1-x(Bi0.5Na0.5)(x)TiO3 ceramics
DOI:10.1016/j.matlet.2012.02.105  JN:MATERIALS LETTERS  PY:2012
  TC:3  AU: Wu, Haidong;Pu, Yongping;Wang, Zhuo;Chen, Kai;
7:1:123:9     (Ba1+xTiO3)-(Bi0.5Na0.5TiO3) Lead-Free, Positive Temperature Coefficient of Resistivity Ceramics: PTC Behavior and Atomic Level Microstructures
DOI:10.1111/j.1551-2916.2012.05423.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Kaneko, Yasushi;Azough, Feridoon;Kida, Toshiki;Ito, Kentaro;Shimada, Takeshi;Minemura, Tetsuroh;Schaffer, Bernhard;Freer, Robert;
7:1:123:10     Anomalous Increase in the Resistivity of n-Doped BaTiO3-Based Ceramics with Pressure Observed at Room Temperature
DOI:10.1111/j.1551-2916.2011.04696.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Al-Allak, Haider M.;
7:1:123:11     Particle sizes effects on electrical properties and densification of laminated Ba1.002La0.003TiO3 ceramics
DOI:10.1016/j.ceramint.2012.08.098  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Zhou, Dongdang;Zhao, Dongchen;Fu, Qiuyun;Hu, Yunxiang;Jian, Gang;Cheng, Xuxin;Shen, Xiaoting;
7:1:123:12     Dielectric properties of Y2O3 donor-doped Ba0.8Sr0.2TiO3 ceramics
DOI:10.1016/j.matchemphys.2013.09.053  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Cao, Wan Q.;Chen, Wei;
7:1:124:1     The extrinsic origins of high permittivity and its temperature and frequency dependence in Y0.5Ca0.5MnO3 and La1.5Sr0.5NiO4 ceramics
DOI:10.1063/1.3692607  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:16  AU: Li, Ming;Sinclair, Derek C.;
7:1:124:2     Hole conduction and electro-mechanical properties of Na0.5Bi2.5Ta2O9-based piezoelectric ceramics with the Li+/Ce3+/Sc3+ modification
DOI:10.1063/1.4893643  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Long, Changbai;Fan, Huiqing;Wu, Yun;Li, Yinghong;
7:1:124:3     Antiferroelectric-like properties and enhanced polarization of Cu-doped K0.5Na0.5NbO3 piezoelectric ceramics
DOI:10.1063/1.4747212  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Ke, S. M.;Huang, H. T.;Fan, H. Q.;Lee, H. K.;Zhou, L. M.;Mai, Y. -W.;
7:1:124:4     A ferroelectric polarization contribution from defect dipoles in acceptor Aurivillius oxide, (Na,Bi)(0.47)(Li,Ce)(0.03)Bi2Ta1.97Sc0.03O8.97
DOI:10.1063/1.4829267  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Long, Changbai;Fan, Huiqing;Li, Mengmeng;
7:1:124:5     Humidity sensitive properties of amorphous (K,Na)NbO3 lead free thin films
DOI:10.1016/j.ceramint.2014.02.116  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Zhen, Yuhua;Wang, Mengmeng;Wang, Sheng;Xue, Qingzhong;
7:1:124:6     Spark plasma sintering of Li/Ta-modified (K,Na)NbO3 lead-free piezoelectric ceramics: Post-annealing temperature effect on phase structure, electrical properties and grain growth behavior
DOI:10.1016/j.mseb.2011.05.051  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:11  AU: Zhen, Yuhua;Li, Jing-Feng;Wang, Ke;Yan, Youguo;Yu, Lianqing;
7:1:124:7     Frequency and temperature dependence of dielectric and electrical properties of radio-frequency sputtered lead-free K0.48Na0.52NbO3 thin films
DOI:10.1016/j.tsf.2010.02.078  JN:THIN SOLID FILMS  PY:2010
  TC:10  AU: Kim, Jin Soo;Lee, Hai Joon;Lee, Sun Young;Kim, Ill Won;Lee, Su Dae;
7:1:124:8     Ceramic thick film humidity sensor based on MgTiO3 + LiF
DOI:10.1016/j.materresbull.2013.06.010  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Kassas, Ahmad;Bernard, Jerome;Lelievre, Celine;Besq, Anthony;Guhel, Yannick;Houivet, David;Boudart, Bertrand;Lakiss, Hassan;Hamieh, Tayssir;
7:1:125:1     The dielectric relaxation behavior of (Na0.82K0.18)(0.5)Bi0.5TiO3 ferroelectric thin film
DOI:10.1063/1.3665389  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Dong, H.;Zheng, X. J.;Li, W.;Gong, Y. Q.;Peng, J. F.;Zhu, Z.;
7:1:125:2     Nanoscale study by piezoresponse force microscopy of relaxor 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) and 0.9Pb(Mg1/3Nb2/3)O-3-0.1PbTiO(3) thin films grown on platinum and LaNiO3 electrodes
DOI:10.1016/j.tsf.2009.12.056  JN:THIN SOLID FILMS  PY:2010
  TC:11  AU: Detalle, M.;Ferri, A.;Da Costa, A.;Desfeux, R.;Soyer, C.;Remiens, D.;
7:1:125:3     Effect of potassium content on electrostrictive properties of Na0.5Bi0.5TiO3-based relaxor ferroelectric thin films with morphotropic phase boundary
DOI:10.1016/j.tsf.2013.09.017  JN:THIN SOLID FILMS  PY:2013
  TC:6  AU: Zheng, X. J.;Liu, J. Y.;Peng, J. F.;Liu, X.;Gong, Y. Q.;Zhou, K. S.;Huang, D. H.;
7:1:125:4     Effects of Annealing Temperature on the Electric Properties of 0.94(Na0.5Bi0.5)TiO3-0.06BaTiO(3) Ferroelectric Thin Film
DOI:10.1007/s11664-013-2912-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Peng, J. F.;Zheng, X. J.;Gong, Y. Q.;Zhan, K.;Dai, Z. H.;
7:1:125:5     Structural and electrical properties of (Na0.85K0.15)(0.5)Bi0.5TiO3 thin films deposited on LaNiO3 and Pt bottom electrodes
DOI:10.1016/j.apsusc.2009.12.026  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:15  AU: Zheng, X. J.;Dai, S. H.;Feng, X.;Zhang, T.;Zhang, D. Z.;Gong, Y. Q.;Chen, Y. Q.;He, L.;
7:1:125:6     Spark-plasma-sintering temperature dependence of structural and piezoelectric properties of BNT-BT0.08 nanostructured ceramics
DOI:10.1007/s10853-011-6215-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:3  AU: Cernea, Marin;Fochi, Fabio;Aldica, Gheorghe Virgil;Vasile, Bogdan Stefan;Trusca, Roxana;Galassi, Carmen;
7:1:125:7     Size effect of mechanical behavior for lead-free (Na0.82K0.18)(0.5)Bi0.5TiO3 nanofibers by nanoindentation
DOI:10.1016/j.msea.2010.05.066  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2010
  TC:2  AU: Chen, Y. Q.;Zheng, X. J.;Li, W.;
7:1:125:8     KTa0.65Nb0.35O3 thin films epitaxially grown by pulsed laser deposition on metallic and oxide epitaxial electrodes
DOI:10.1016/j.apsusc.2011.08.049  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:2  AU: Bouyasfi, A.;Mouttalie, M.;Demange, V.;Gautier, B.;Grandfond, A.;Deputier, S.;Ollivier, S.;Hamedi, L' H.;Guilloux-Viry, M.;
7:1:125:9     Characterizing nanoscale electromechanical fatigue in Pb(Mg1/3Nb2/3)O-3-PbTiO3 thin films by piezoresponse force microscopy
DOI:10.1016/j.tsf.2011.07.032  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Gatoux, A.;Ferri, A.;Detalle, M.;Remiens, D.;Desfeux, R.;
7:1:126:1     Structure of Ferroelectric Silver Niobate AgNbO3
DOI:10.1021/cm103389q  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:26  AU: Yashima, Masatomo;Matsuyama, Shota;Sano, Rikiya;Itoh, Mitsuru;Tsuda, Kenji;Fu, Desheng;
7:1:126:2     Unique dielectric tunability of Ag(Nb1-xTax)O-3 (x=0-0.5) ceramics with ferrielectric polar order
DOI:10.1063/1.4875581  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Lei;Spreitzer, Matjaz;Suvorov, Danilo;
7:1:126:3     Ferroelectricity and electromechanical coupling in (1-x)AgNbO3-xNaNbO(3) solid solutions
DOI:10.1063/1.3609234  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Fu, Desheng;Arioka, Takahiro;Taniguchi, Hiroki;Taniyama, Tomoyasu;Itoh, Mitsuru;
7:1:126:4     Low-Temperature Phase Transition in AgNbO3
DOI:10.1111/jace.12857  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Zhang, Tingsong;Zhang, Chenyang;Wang, Ling;Chai, Yisheng;Shen, Shipeng;Sun, Young;Yuan, Hongming;Feng, Shouhua;
7:1:126:5     Enhanced Grain Growth in Lead-Free (1-x)(Na0.5Bi0.5)TiO3-xAgNbO(3) Solid Solution Ceramics
DOI:10.1080/00150193.2014.893163  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Wong, J. Y. Y.;Promsawat, M.;Ren, Z.;Lei, C.;Ye, Z-G;
7:1:126:6     Silver deficiency and excess effects on quality, dielectric properties and phase transitions of AgNbO3 ceramics
DOI:10.1016/j.jeurceramsoc.2014.01.016  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Kania, A.;Niewiadomski, A.;Miga, S.;Jankowska-Sumara, I.;Pawlik, M.;Ujma, Z.;Koperski, J.;Suchanicz, J.;
7:1:126:7     Hydrothermal Syntheses and Structural Phase Transitions of AgNbO3
DOI:10.1111/j.1551-2916.2012.05392.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Chang, Haibo;Shang, Mingyu;Zhang, Chenyang;Yuan, Hongming;Feng, Shouhua;
7:1:126:8     Topotactic soft chemical synthesis and photocatalytic performance of one-dimensional AgNbO3 nanostructures
DOI:10.1016/j.matlet.2014.08.150  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Cao, Liyun;Guo, Zhanglin;Huang, Jianfeng;Li, Cuiyan;Fei, Jie;Feng, Qi;Wen, Puhong;Sun, Youquan;Kong, Xingang;
7:1:126:9     Ferroelectric and antiferroelectric properties of AgNbO3 films fabricated on (001), (110), and (111)SrTiO3 substrates by pulsed laser deposition
DOI:10.1063/1.3467137  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Sakurai, Hiroyuki;Yamazoe, Seiji;Wada, Takahiro;
7:1:126:10     Anisotropic Dielectric Properties of AgNbO3 Single Crystals
DOI:10.1080/00150193.2010.482485  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Kania, A.;
7:1:126:11     Li-7 NMR study of milling effects on instability of lithium-sites in lithium substituted silver niobate
DOI:10.1016/j.ssi.2013.11.026  JN:SOLID STATE IONICS  PY:2014
  TC:0  AU: Nakamura, Koichi;Michihiro, Yoshitaka;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;Wada, Satoshi;
7:1:126:12     Mechanism and improvement of the visible light photocatalysis of organic pollutants over microcrystalline AgNbO3 prepared by a sol-gel method
DOI:10.1016/j.materresbull.2013.01.011  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Wu, Weiming;Liang, Shijing;Chen, Yan;Shen, Lijuan;Yuan, Rusheng;Wu, Ling;
7:1:127:1     Microstructural features and electrical properties of copper oxide added potassium sodium niobate ceramics
DOI:10.1016/j.ceramint.2010.03.018  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:29  AU: Alkoy, Ebru Mensur;Papila, Melih;
7:1:127:2     Field-induced recoverable strain behavior of CuO-added K0.5Na0.5NbO3 ceramics and 1-3 fiber/epoxy piezocomposites
DOI:10.1063/1.3503845  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Alkoy, Ebru Mensur;
7:1:127:3     Sodium niobate particles with controlled morphology synthesized by hydrothermal method and their use as templates in KNN fibers
DOI:10.1016/j.apt.2014.07.012  JN:ADVANCED POWDER TECHNOLOGY  PY:2014
  TC:0  AU: Ozeren, Yagiz;Mensur-Alkoy, Ebru;Alkoy, Sedat;
7:1:127:4     Processing and Properties of Textured Potassium Strontium Niobate (KSr2Nb5O15) Ceramic Fibers - Texture Development
DOI:10.1111/j.1551-2916.2011.04994.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Alkoy, Sedat;Dursun, Sinan;
7:1:127:5     Hydrothermal synthesis of submicron NaNbO3 powders
DOI:10.1016/j.ceramint.2010.11.011  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:8  AU: Song, Huawei;Ma, Wenhui;
7:1:127:6     Processing and Properties of Textured Potassium Sodium Niobate [K,Na]NbO3 Ceramic Ribbons by Alginate Gelation Method
DOI:10.1111/jace.13139  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Mensur-Alkoy, Ebru;Berksoy-Yavuz, Ayse;Alkoy, Sedat;
7:1:127:7     Macro and Microstructural Engineering of Piezoelectric Ceramics
DOI:10.1080/00150193.2013.842070  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Alkoy, Sedat;Mensur-Alkoy, Ebru;Berksoy-Yavuz, Ayse;Dursun, Sinan;Olukkent, Recep;Ozeren, Yagiz;
7:1:127:8     Examination of selectivity of templates for the textured potassium sodium niobate ceramics
DOI:10.1016/j.apt.2010.06.002  JN:ADVANCED POWDER TECHNOLOGY  PY:2011
  TC:2  AU: Choi, Si-Young;Jeon, Jae-Ho;
7:1:127:9     Electrical Properties of 1-3 Piezocomposites with Potassium Sodium Niobate Fibers
DOI:10.1080/00150193.2011.594755  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Alkoy, Ebru Mensur;Tekdas, A. Serkan;Berksoy, Ayse;
7:1:128:1     Improving ferroelectric and piezoelectric properties of PbFe1/4Sc1/4Nb1/2O3 ceramics by oxide doping prepared via a B-site oxide mixing route
DOI:10.1016/j.ceramint.2012.08.010  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Fang, Bijun;Zhu, Meijuan;Ding, Jianning;Shan, Yuejin;Imoto, Hideo;
7:1:128:2     Structural and electrical properties of 0.57PSN-0.43PT ceramics prepared by mechanochemical synthesis and sintered at low temperature
DOI:10.1016/j.jeurceramsoc.2011.08.033  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Ursic, Hana;Tellier, Jenny;Holc, Janez;Drnovsek, Silvo;Kosec, Marija;
7:1:128:3     Enhancing pyroelectric property of Pb(Fe1/4Sc1/4Nb1/2)O-3 ceramics
DOI:10.1016/j.jallcom.2014.01.104  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Liu, Chunlin;Qian, Kun;Lu, Fengxia;Chen, Zhihui;Fang, Bijun;Ding, Jianning;Shan, Yuejin;Imoto, Hideo;
7:1:128:4     Synthesis of Pb(Mg1/3Nb2/3)O-3 by Self-Assembled Colloidal Aggregates
DOI:10.1111/j.1551-2916.2011.04443.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Trefalt, Gregor;Malic, Barbara;Kuscer, Danjela;Holc, Janez;Kosec, Marija;
7:1:128:5     Influence of the substrate on the phase composition and electrical properties of 0.65PMN-0.35PT thick films
DOI:10.1016/j.jeurceramsoc.2010.04.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:16  AU: Ursic, H.;Hrovat, M.;Holc, J.;Tellier, J.;Drnovsek, S.;Guiblin, N.;Dkhil, B.;Kosec, M.;
7:1:128:6     Influence of the sintering conditions on the properties of 0.57PSN-0.43PT ceramics prepared from mechanochemically activated powder
DOI:10.1016/j.jeurceramsoc.2012.09.031  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Ursic, Hana;Holc, Janez;Kosec, Marija;
7:1:128:7     The influence of thermal stresses on the phase composition of 0.65Pb (Mg1/3Nb2/3)O-3-0.35PbTiO(3) thick films
DOI:10.1063/1.3526971  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Ursic, Hana;Zarnik, Marina Santo;Tellier, Jenny;Hrovat, Marko;Holc, Janez;Kosec, Marija;
7:1:128:8     0.65Pb(Mg1/3Nb2/3)O-3-0.35PbTiO(3) thick films prepared by electrophoretic deposition from an ethanol-based suspension
DOI:10.1016/j.jeurceramsoc.2009.11.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Kuscer, Danjela;Kosec, Marija;
7:1:128:9     Broadband dielectric spectroscopy of PbMg1/3Nb2/3O3-PbSc1/2Nb1/2O3 ceramics
DOI:10.1016/j.jeurceramsoc.2009.05.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Grigalaitis, R.;Banys, J.;Macutkevic, J.;Adomavicius, R.;Krotkus, A.;Bormanis, K.;Sternberg, A.;
7:1:128:10     Synthesis and characterization of (Na0.85K0.15)(0.5)Bi0.5TiO3 ceramics by different methods
DOI:10.1016/j.materresbull.2011.02.014  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:4  AU: Li, Wei;Xu, Zhijun;Chu, Ruiqing;Fu, Peng;Zhang, Yanjie;
7:1:128:11     Linear thermal expansion coefficients of relaxor-ferroelectric 0.57Pb(Sci(1/2)Nb(1/2))O-3-0.43PbTiO(3) ceramics in a wide temperature range
DOI:10.1016/j.jeurceramsoc.2013.03.023  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Ursic, H.;Malic, B.;Cilensek, J.;Rojac, T.;Kmet, B.;Kosec, M.;
7:1:128:12     Electrophoretic deposition of Pb(Ni1/3Nb2/3)O-3-Pb(Zr,Ti)O-3 thick film on Pt wire
DOI:10.1016/j.ceramint.2011.04.093  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Lu, Jianping;Li, Guorong;Bian, Jianjiang;Zeng, Jiangtao;Zeng, Huarong;
7:1:128:13     Structural, Optical and Improved Electrical Properties of Relaxor-Based Single Crystals After Poling
DOI:10.1111/j.1551-2916.2012.05106.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Fang, Bijun;Qian, Kun;Miao, Fenfen;Yuan, Ningyi;Ding, Jianning;Zhao, Xiangyong;Xu, Haiqing;Luo, Haosu;
7:1:128:14     Dielectric relaxation and conductivity in the PbCo0.5Ta0.5O3 ceramics
DOI:10.1016/j.ssi.2013.02.015  JN:SOLID STATE IONICS  PY:2013
  TC:0  AU: Simenas, M.;Sobiestianskas, R.;Bormanis, K.;Banys, J.;Ramoska, T.;
7:1:129:1     Microstructures, dielectric and ferroelectric properties of BaHfxTi1-xO3 ceramics
DOI:10.1016/j.jallcom.2012.07.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Chen, Jian;Fu, Chunlin;Cai, Wei;Chen, Gang;Ran, Shaonian;
7:1:129:2     Microstructures and Dielectric Properties of BaHf0.1Ti0.9O3 Ceramics Prepared Using Conventional and Microwave Sintering Methods
DOI:10.1080/00150193.2014.932195  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Fu, Chunlin;Ran, Shaonian;Cai, Wei;Chen, Gang;Deng, Xiaoling;
7:1:129:3     Room-temperature magnetoelectric coupling in single-phase BaTiO3-BiFeO3 system
DOI:10.1063/1.4799591  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:15  AU: Yang, Su-Chul;Kumar, Ashok;Petkov, Valeri;Priya, Shashank;
7:1:129:4     Epitaxial growth and electrical measurement of single crystalline Pb(Zr0.52Ti0.48)O-3 thin film on Si(001) for micro-electromechanical systems
DOI:10.1016/j.tsf.2011.11.073  JN:THIN SOLID FILMS  PY:2012
  TC:11  AU: Yin, S.;Niu, G.;Vilquin, B.;Gautier, B.;Le Rhun, G.;Defay, E.;Robach, Y.;
7:1:129:5     Effect of Ba(Cu1/3Nb2/3)O-3 content on rnultiferroic properties in BiFeO3 ceramics
DOI:10.1016/j.mseb.2012.02.016  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:4  AU: Baek, Chang-Woo;Oh, Nam-Keun;Han, Guifang;Yoon, Woon-Ha;Kim, Jong-Woo;Choi, Jong-Jin;Han, Byung-Dong;Park, Dong-Soo;Sung, Kil-Dong;Jung, Jong-Hoon;Jeong, Dae-Yong;Kim, Jeong-Joo;Ryu, Jungho;
7:1:129:6     Enhanced microwave dielectric properties of Ba0.40Sr0.60TiO3-Zr0.80Sn0.20TiO4 composite ceramics
DOI:10.1007/s10853-011-6086-3  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Jiang, Haitao;Zhai, Jiwei;Zhang, Mingwei;Yao, Xi;
7:1:129:7     Capacitance Enhancement of Doped Barium Titanate Dielectrics and Multilayer Ceramic Capacitors by a Post-Sintering Thermo-Mechanical Treatment
DOI:10.1111/j.1551-2916.2012.05196.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Guillon, Olivier;Chang, Jaemyung;Schaab, Silke;Kang, Suk-Joong L.;
7:1:129:8     Enhancement of Multiferroic Properties in BiFeO3-Ba(Cu1/3Nb2/3)O-3: Film Fabricated by Aerosol Deposition
DOI:10.1111/j.1551-2916.2010.04315.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Ryu, Jungho;Baek, Chang-Woo;Lee, Yong-Seok;Oh, Nam-Keun;Han, Guifang;Kim, Jong-Woo;Hahn, Byung-Dong;Choi, Jong-Jin;Yoon, Woon-Ha;Choi, Joon-Hwan;Park, Dong-Soo;Jeong, Dae-Yong;
7:1:130:1     Dielectric Properties and Structures of Zn-doped Barium Zirconate Titanate Films
DOI:10.1080/10584587.2014.874258  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Liu, Xingbing;Deng, Xiaoling;Liu, Kaihua;Cai, Wei;Fu, Chunlin;
7:1:130:2     Phase transformation and dielectric properties in Ba1-xLaxZr0.1Ti0.9O3 ceramics
DOI:10.1016/j.jallcom.2014.01.015  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Huang, Xia;Zhang, Jingji;Ji, Ludong;Qi, Hongfang;Wang, Jiangying;
7:1:130:3     High, purely electrostrictive effect in cubic K0.95Na0.05Ta1-xNbxO3 lead-free single crystals
DOI:10.1016/j.matlet.2011.10.021  JN:MATERIALS LETTERS  PY:2012
  TC:15  AU: Tian, Hao;Hu, Chengpeng;Chen, Qizhen;Zhou, Zhongxiang;
7:1:130:4     Enhancement in electro-strain behavior by La3+ substitution in lead free BaZr0.05Ti0.95O3 ceramics
DOI:10.1016/j.matlet.2013.01.057  JN:MATERIALS LETTERS  PY:2013
  TC:9  AU: Mahajan, Sandeep;Haridas, Divya;Sreenivas, K.;Thakur, O. P.;Prakash, Chandra;
7:1:130:5     Structure and dielectric properties of barium titanate thin films for capacitor applications
DOI:10.1016/j.ceramint.2012.10.118  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: He, Fan;Ren, Wei;Liang, Guanghua;Shi, Peng;Wu, Xiaoqing;Chen, Xiaofeng;
7:1:130:6     Multiferroic epitaxial Mn-doped BaTiO3 thin films
DOI:10.1016/j.tsf.2011.12.046  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Son, Jong Yeog;Shin, Yun-Sok;
7:1:130:7     Structure, dielectric and electrical properties of cerium doped barium zirconium titanate ceramics
DOI:10.1016/j.jallcom.2011.08.015  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Feng, Hongjun;Hou, Jungang;Qu, Yuanfang;Shan, Dan;Yao, Guohua;
7:1:130:8     Complex impedance and modulus studies of cerium doped barium zirconium titanate solid solution
DOI:10.1016/j.jallcom.2012.09.062  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Sagar, Raghavendra;Raibagkar, R. L.;
7:1:130:9     Effect of substrate temperature on the properties of TiO2 nanoceramic films
DOI:10.1016/j.ceramint.2011.11.014  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Lin, Su-Shia;
7:1:130:10     DC field effect on dielectric property of Ba(ZrxTi1-x)O-3 ceramics
DOI:10.1016/j.ceramint.2012.10.026  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Shen, Bo;Zhang, Qiwei;Zhai, Jiwei;Xu, Zhengkui;
7:1:130:11     Synthesis and properties of multiferroic 0.7BiFeO(3)-0.3BaTiO(3) thin films by Mn doping
DOI:10.1016/j.ceramint.2012.10.112  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Ito, Yuya;Sakamoto, Wataru;Moriya, Makoto;Yogo, Toshinobu;
7:1:130:12     Fabrication of BaTiO3 Thin Films and Microdot Patterns by Halide-Free Nonaqueous Solution Route
DOI:10.1111/j.1551-2916.2009.03383.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:1  AU: Wagata, Hajime;Taniguchi, Takaaki;Gallage, Ruwan;Subramani, A. K.;Sakamoto, Naonori;Watanabe, Tomoaki;Yoshimura, Masahiro;Matsushita, Nobuhiro;
7:1:131:1     Morphotropic phase boundary and electrical properties in (1-x)Bi0.5Na0.5TiO3-xBi(Zn0.5Ti0.5)O-3 lead-free piezoceramics
DOI:10.1063/1.3431387  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:24  AU: Zhang, Shan-Tao;Yan, Feng;Yang, Bin;
7:1:131:2     Morphotropic phase boundary and electric properties in (1-x)Bi(0.5)Na(0.5)TiO(3-)xBiCoO(3) lead-free piezoelectric ceramics
DOI:10.1063/1.4730770  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Guo, Fei-Fei;Yang, Bin;Zhang, Shan-Tao;Liu, Xiao;Zheng, Li-Mei;Wang, Zhu;Wu, Feng-Min;Wang, Da-Li;Cao, Wen-Wu;
7:1:131:3     A new Bi0.5Na0.5TiO3 based lead-free piezoelectric system with calculated end-member Bi(Zn0.5Hf0.5)O-3
DOI:10.1063/1.4868583  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Liu, Feng;Wahyudi, Olivia;Li, Yongxiang;
7:1:131:4     Temperature-dependent electrical properties of B-site zinc substituted bismuth sodium titanate piezoceramics
DOI:10.1016/j.ceramint.2011.12.029  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Zhang, Hao;Fu, Shao-Jie;Long, Wei-Jie;Guo, Dong-Jie;
7:1:131:5     Absence of tetragonal distortion in (1-x)SrTiO3-xBi(Zn1/2Ti1/2)O-3 solid solution
DOI:10.1063/1.4804934  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Pandey, Rishikesh;Pillutla, Ravi Kiran;Shankar, Uma;Singh, Akhilesh Kumar;
7:1:131:6     Preparation and Electric Properties of Bi0.5Na0.5TiO3-Bi(Al0.5Ga0.5)O-3 Lead-Free Piezoceramics
DOI:10.1111/jace.12588  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Wang, Qi;Chen, Jun;Fan, Longlong;Song, Huidong;Gao, Wei;Rong, Yangchun;Liu, Laijun;Fang, Liang;Xing, Xianran;
7:1:131:7     Preparation and Electric Properties of Bi0.5Na0.5TiO3-Bi(Mg0.5Ti0.5)O-3 Lead-Free Piezoceramics
DOI:10.1111/jace.12147  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Wang, Qi;Chen, Jun;Fan, Longlong;Liu, Laijun;Fang, Liang;Xing, Xianran;
7:1:131:8     Synthesis and Dielectric Characterization of a New Relaxor Solid Solution of (1-x)Pb(Mg1/3Nb2/3)O3-xBi(Zn1/2Ti1/2)O3
DOI:10.1080/00150193.2010.482894  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Tailor, H. N.;Bokov, A. A.;Ye, Z. -G.;
7:1:131:9     Fabrication, Phase and Microstructural Studies on Chemically Modified La-doped Bismuth Sodium Titanate Ceramics
DOI:10.1080/00150193.2013.843348  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Eaksuwanchai, P.;Jiansirisomboon, S.;Watcharapasorn, A.;
7:1:132:1     Optical constants of MOCVD-grown Aurivillius phases in the Bi4Ti3O12-Na0.5Bi0.5TiO3 system measured by spectroscopic ellipsometry
DOI:10.1007/s00339-011-6581-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:1  AU: Bin Anooz, S.;Schwarzkopf, J.;Petrik, P.;Schmidbauer, M.;Duk, A.;Agocs, E.;Fornari, R.;
7:1:132:2     First-principles study on the electronic and optical properties of Na0.5Bi0.5TiO3 lead-free piezoelectric crystal
DOI:10.1063/1.3309407  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:19  AU: Zeng, Min;Or, Siu Wing;Chan, Helen Lai Wa;
7:1:132:3     Effects of hydrostatic pressure on Pb(Zr1-xTix)O-3 near the morphotropic phase boundary
DOI:10.1063/1.3520659  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Wu, Chaoye;Duan, Wenhui;Zhang, Xiao-Wen;Liu, Zhirong;
7:1:132:4     The electronic properties and lattice dynamics of (Na0.5Bi0.5)TiO3: From cubic to tetragonal and rhombohedral phases
DOI:10.1063/1.4869733  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Lu, Hongfeng;Wang, Shanying;Wang, Xiaosu;
7:1:132:5     Synthesis of the superlattice complex oxide Sr5Bi4Ti8O27 and its band gap behavior
DOI:10.1063/1.4722942  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Zurbuchen, M. A.;Podraza, N. J.;Schubert, J.;Jia, Y.;Schlom, D. G.;
7:1:132:6     Lead-free potassium bismuth titanate thin film with complex Aurivillius layer structure
DOI:10.1063/1.3374709  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Cheng, Z. X.;Wang, X. L.;Zhao, H. Y.;Kimura, H.;
7:1:132:7     From normal ferroelectric transition to relaxor behavior in Aurivillius ferroelectric ceramics
DOI:10.1007/s10853-014-8448-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:2  AU: Gonzalez-Abreu, Y.;Pelaiz-Barranco, A.;Guerra, J. D. S.;Gagou, Y.;Saint-Gregoire, P.;
7:1:132:8     Synthesis, structure, and electrical behavior of Sr4Bi4Ti7O24
DOI:10.1063/1.3273388  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Zurbuchen, M. A.;Sherman, V. O.;Tagantsev, A. K.;Schubert, J.;Hawley, M. E.;Fong, D. D.;Streiffer, S. K.;Jia, Y.;Tian, W.;Schlom, D. G.;
7:1:132:9     Spectroscopic ellipsometry studies on the optical constants of Bi4Ti3O12:xNa thin films grown by metal-organic chemical vapor deposition
DOI:10.1016/j.tsf.2010.12.242  JN:THIN SOLID FILMS  PY:2011
  TC:1  AU: Bin Anooz, S.;Schwarzkopf, J.;Dirsyte, R.;Agocs, E.;Petrik, P.;Kwasniewski, A.;Wagner, G.;Fornari, R.;
7:1:132:10     Dielectric Relaxation Mechanisms in Relaxor Bi-Layered Perovskites
DOI:10.1080/00150193.2012.671637  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Pelaiz-Barranco, A.;Gonzalez-Abreu, Y.;
7:1:132:11     Improved Electrical Properties of Cr-Doped K0.5Bi4.5Ti4O15 Thin Films Fabricated by Chemical Solution Deposition
DOI:10.1080/10584587.2011.616421  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:0  AU: Do, D.;Kim, S. S.;Bhalla, A. S.;
7:1:133:1     Pyroelectric energy harvesting using Olsen cycles in purified and porous poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] thin films
DOI:10.1088/0964-1726/20/2/025012  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:35  AU: Navid, Ashcon;Pilon, Laurent;
7:1:133:2     The pyroelectric energy harvesting capabilities of PMN-PT near the morphotropic phase boundary
DOI:10.1088/0964-1726/20/5/055020  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:36  AU: Kandilian, Razmig;Navid, Ashcon;Pilon, Laurent;
7:1:133:3     An analysis of lead-free (Bi0.5Na0.5)(0.915)-(Bi0.5K0.5)(0.05)Ba0.02Sr0.015TiO3 ceramic for efficient refrigeration and thermal energy harvesting
DOI:10.1063/1.4861031  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:9  AU: Vats, Gaurav;Vaish, Rahul;Bowen, Chris R.;
7:1:133:4     Energy harvesting by nonlinear capacitance variation for a relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer
DOI:10.1063/1.3595325  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Zhu, H.;Pruvost, S.;Cottinet, P. J.;Guyomar, D.;
7:1:133:5     Thermal-to-electric energy conversion using ferroelectric film capacitors
DOI:10.1063/1.4900722  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Kozyrev, A. B.;Platonov, R. A.;Soldatenkov, O. I.;
7:1:133:6     Purified and porous poly(vinylidene fluoride-trifluoroethylene) thin films for pyroelectric infrared sensing and energy harvesting
DOI:10.1088/0964-1726/19/5/055006  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:34  AU: Navid, A.;Lynch, C. S.;Pilon, L.;
7:1:133:7     Phase transitions and thermal expansion in pyroelectric energy conversion
DOI:10.1063/1.4776668  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: McKinley, Ian M.;Pilon, Laurent;
7:1:133:8     A novel thermally biased mechanical energy conversion cycle
DOI:10.1063/1.4846735  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: McKinley, Ian M.;Goljahi, Sam;Lynch, Christopher S.;Pilon, Laurent;
7:1:134:1     Structure and Piezoelectric Properties of Fe-Doped Potassium Sodium Niobate Tantalate Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2011.04390.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:16  AU: Yang, Wenlong;Zhou, Zhongxiang;Yang, Bin;Zhang, Rui;Wang, Zhu;Chen, Hengzhi;Jiang, Yongyuan;
7:1:134:2     Influence of MnO2 Doping on the Dielectric and Piezoelectric Properties and the Domain Structure in (K0.5Na0.5)NbO3 Single Crystals
DOI:10.1111/j.1551-2916.2009.03501.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:23  AU: Lin, Dabin;Li, Zhenrong;Zhang, Shujun;Xu, Zhuo;Yao, Xi;
7:1:134:3     The Effects of Ta Substitution and K/Na Ratio Variation on the Microstructure and Properties of (K,Na)NbO3-Based Lead Free Piezoelectric Ceramics
DOI:10.1007/s11664-014-3082-9  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Shang, Xunzhong;Guo, Jinming;Xiao, Wanping;Lu, Yinmei;Chang, Gang;Zhou, Taosheng;He, Yunbin;
7:1:134:4     Structure, microstructure, and piezoelectric properties of ytterbium-doped potassium sodium niobate lead-free ceramics
DOI:10.1007/s13391-013-3015-4  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:4  AU: Li, Huan;Yang, Wenlong;Zhou, Zhongxiang;Tian, Hao;
7:1:134:5     Electric aging behavior of lead-free Li-0.06(K0.48Na0.52)(0.94)(Nb0.86Ta0.08Sb0.06)O-3 piezoelectric ceramics improved by pre-calcined method
DOI:10.1016/j.ceramint.2011.04.114  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Cheng, Chien-Min;Kuan, Min-Chang;Chen, Kai-Huang;Tsai, Jen-Hwan;
7:1:134:6     Investigation of the Structure and Electrical Properties of (KxNa0.96-xLi0.04)(Nb0.96-yTaySb0.04)O3 Piezoelectric Ceramics Modified with Manganese
DOI:10.1111/jace.12019  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Mgbemere, Henry E.;Hinterstein, Manuel;Schneider, Gerold A.;
7:1:134:7     Diffusion of iron in lithium niobate: a secondary ion mass spectrometry study
DOI:10.1007/s00339-011-6559-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:3  AU: Ciampolillo, M. V.;Argiolas, N.;Zaltron, A.;Bazzan, M.;Sada, C.;
7:1:134:8     Lithium niobate crystals doped with iron by thermal diffusion: Relation between lattice deformation and reduction degree
DOI:10.1063/1.3342599  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Ciampolillo, M. V.;Zaltron, A.;Bazzan, M.;Argiolas, N.;Sada, C.;Bianconi, M.;
7:1:134:9     Iron doping of lithium niobate by thermal diffusion from thin film: study of the treatment effect
DOI:10.1007/s00339-011-6258-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:5  AU: Ciampolillo, Maria Vittoria;Zaltron, Annamaria;Bazzan, Marco;Argiolas, Nicola;Sada, Cinzia;Mignoni, Sabrina;Fontana, Marc;
7:1:134:10     Effects of Sintering Temperature on Structure and Properties of 0.997(KNN-LS-BF)-0.003V(2)O(5) Lead-Free Piezoelectric Ceramics
DOI:10.1007/s11664-012-2346-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:1  AU: Wang, Hua;Zhai, Xia;Xu, Jiwen;Yuan, Changlai;Zhou, Changrong;Liu, Xinyu;
7:1:135:1     Effect of annealing processes on the structural and electrical properties of the lead-free thin films of (Ba0.9Ca0.1)(Ti0.9Zr0.1)O-3
DOI:10.1016/j.jallcom.2013.02.054  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Shi, Min;Zhong, Jiagang;Zuo, Ruzhong;Xu, Yudong;Wang, Lei;Su, Hailin;Gu, Cang;
7:1:135:2     Impedance and electric modulus analysis of Sm-modified Pb(Zr0.55Ti0.45)(1-x/4)O-3 ceramics
DOI:10.1016/j.jallcom.2011.03.003  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:27  AU: Ranjan, Rajiv;Kumar, Rajiv;Kumar, Nawnit;Behera, Banarji;Choudhary, R. N. P.;
7:1:135:3     Effects of lanthanum doping on the preferred orientation, phase structure and electrical properties of sol-gel derived Pb1-3x/2Lax (Zr0.6Ti0.4)O-3 thin films
DOI:10.1016/j.jallcom.2010.11.177  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Zhang, S. Q.;Wang, L. D.;Li, W. L.;Li, N.;Fei, W. D.;
7:1:135:4     Effect of LaNiO3 Buffer Layer on Ferroelectric Properties of Ba(Zr,Ti)O-3 Thin Films
DOI:10.1080/10584587.2012.741498  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Li, Wei;Zhou, Qigang;Hao, Jigong;Bai, Wangfeng;Zhai, Jiwei;
7:1:135:5     Microstructure and electrical properties of Ba0.7Sr0.3(Ti1-xZrx)O-3 thin films prepared on copper foils with sol-gel method
DOI:10.1016/j.tsf.2009.09.051  JN:THIN SOLID FILMS  PY:2010
  TC:4  AU: Fan, Yanhua;Yu, Shuhui;Sun, Rong;Li, Lei;Yin, Yansheng;Du, Ruxu;
7:1:135:6     Growth and characterization of (Pb,La)(Zr,Ti)O-3 thin film epilayers on SrTiO3-buffered Si(001)
DOI:10.1016/j.tsf.2010.04.023  JN:THIN SOLID FILMS  PY:2010
  TC:2  AU: Nordseth, Ornulf;You, Chang Chuan;Folven, Erik;Gariglio, Stefano;Sambri, Alessia;Triscone, Jean-Marc;Reiner, James W.;Ahn, Charles H.;Tybell, Thomas;Grepstad, Jostein K.;
7:1:136:1     High dielectric tunability in lead niobate pyrochlore films
DOI:10.1063/1.3687722  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Mirsaneh, M.;Hayden, B. E.;Furman, E.;Perini, S.;Lanagan, M. T.;Reaney, I. M.;
7:1:136:2     Growth of epitaxial sodium-bismuth-titanate films by metal-organic chemical vapor phase deposition
DOI:10.1016/j.tsf.2011.07.050  JN:THIN SOLID FILMS  PY:2011
  TC:6  AU: Schwarzkopf, J.;Schmidbauer, M.;Duk, A.;Kwasniewski, A.;Bin Anooz, S.;Wagner, G.;Devi, A.;Fornari, R.;
7:1:136:3     Tunable RF Filters Fabricated Using MOCVD Deposited Graded Composition BST Films
DOI:10.1080/10584587.2011.574978  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:6  AU: Kalkur, T. S.;Sbrockey, N.;Tompa, G. S.;Cole, M. W.;
7:1:136:4     Impact of the crystallographic structure of epitaxially grown strained sodium-bismuth-titanate thin films on local piezo- and ferroelectric properties
DOI:10.1016/j.materresbull.2012.04.004  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:1  AU: Duk, Andreas;Schwarzkopf, Jutta;Kwasniewski, Albert;Schmidbauer, Martin;Fornari, Roberto;
7:1:136:5     High throughput physical vapour deposition and dielectric and ferroelectric screening of (Bi,Na)TiO3 thin-film libraries
DOI:10.1063/1.4773101  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Darby, Mark S. B.;Guerin, Samuel;Hayden, Brian E.;Schreiner, Hans-Juergen;Yakovlev, Sergey;
7:1:136:6     Fine tuning epitaxial strain in ferroelectrics: PbxSr1-xTiO3 on DyScO3
DOI:10.1063/1.3532103  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Rispens, G.;Heuver, J. A.;Noheda, B.;
7:1:136:7     Depositions of SrRuO3 thin films on oxide substrates with liquid-delivery spin MOCVD
DOI:10.1016/j.tsf.2009.12.057  JN:THIN SOLID FILMS  PY:2010
  TC:5  AU: Schwarzkopf, J.;Dirsyte, R.;Devi, A.;Schmidbauer, M.;Wagner, G.;Fornari, R.;
7:1:136:8     Impact of epitaxial strain on the ferromagnetic transition temperature of SrRuO3 thin films
DOI:10.1016/j.tsf.2011.03.132  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Dirsyte, R.;Schwarzkopf, J.;Schmidbauer, M.;Wagner, G.;Irmscher, K.;Bin Anooz, S.;Fornari, R.;
7:1:136:9     High throughput synthesis and characterization of the PbnNb2O5+n (0.5 < n < 4.1) system on a single chip
DOI:10.1016/j.actamat.2010.12.023  JN:ACTA MATERIALIA  PY:2011
  TC:2  AU: Mirsaneh, Mehdi;Hayden, Brian E.;Miao, Shu;Pokorny, Jan;Perini, Steve;Furman, Eugene;Lanagan, Michael T.;Ubic, Rick;Reaney, Ian M.;
7:1:136:10     Influence of Na on the structure of Bi4Ti3O12 films deposited by liquid-delivery spin MOCVD
DOI:10.1016/j.tsf.2010.12.206  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Schwarzkopf, J.;Dirsyte, R.;Devi, A.;Kwasniewski, A.;Schmidbauer, M.;Wagner, G.;Michling, M.;Schmeisser, D.;Fornari, R.;
7:1:136:11     Tunable Coplanar Wave Guide Band Stop Filters
DOI:10.1080/10584587.2013.780138  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Aldeeb, Hassan;Kalkur, T. S.;
7:1:136:12     Structural and transport properties of SrRuO3 thin films grown by MOCVD on (001) SrTiO3 substrates: The role of built-in strain and extra phases
DOI:10.1016/j.mseb.2011.02.008  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:0  AU: Bin Anooz, S.;Schwarzkopf, J.;Dirsyte, R.;Schmidbauer, M.;Irmscher, K.;Kwasniewski, A.;Fornari, R.;
7:1:137:1     Anomalous elastic behavior of relaxor ferroelectric Ca0.28Ba0.72Nb2O6 single crystals
DOI:10.1103/PhysRevB.84.174102  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Pandey, Chandra Shekhar;Schreuer, Juergen;Burianek, Manfred;Muehlberg, Manfred;
7:1:137:2     Relaxor behavior of CaxBa1-xNb2O6 (0.18 <= x <= 0.35) tuned by Ca/Ba ratio and investigated by resonant ultrasound spectroscopy
DOI:10.1103/PhysRevB.87.094101  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Pandey, Chandra Shekhar;Schreuer, Juergen;Burianek, Manfred;Muehlberg, Manfred;
7:1:137:3     Critical slowing down and elastic anomaly of uniaxial ferroelectric Ca0.28Ba0.72Nb2O6 crystals with tungsten bronze structure
DOI:10.1103/PhysRevB.90.064110  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Suzuki, K.;Matsumoto, K.;Dec, J.;Lukasiewicz, T.;Kleemann, W.;Kojima, S.;
7:1:137:4     Relaxor behavior of ferroelectric Ca0.22Sr0.12Ba0.66Nb2O6
DOI:10.1063/1.4775686  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Pandey, Chandra Shekhar;Schreuer, Juergen;Burianek, Manfred;Muehlberg, Manfred;
7:1:137:5     Temperature dependence of elastic moduli of polycrystalline beta plutonium
DOI:10.1103/PhysRevB.84.064105  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Suzuki, Yoko;Fanelli, V. R.;Betts, J. B.;Freibert, F. J.;Mielke, C. H.;Mitchell, J. N.;Ramos, M.;Saleh, T. A.;Migliori, A.;
7:1:137:6     Anomalous elastic behavior of relaxor ferroelectric Ca0.28Ba0.72Nb2O6:Ce studied by resonant ultrasound spectroscopy
DOI:10.1063/1.3670323  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Pandey, Chandra Shekhar;Schreuer, Juergen;Burianek, Manfred;Muehlberg, Manfred;
7:1:137:7     Polar nanoregions of Ca0.28Ba0.72Nb2O6 probed by second harmonic generation and Raman spectroscopy at high pressure
DOI:10.1063/1.4885837  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ruiz-Fuertes, J.;Bayarjargal, L.;Winkler, B.;Burianek, M.;Muehlberg, M.;
7:1:137:8     Elastic and piezoelectric constants of tourmaline single crystals at non-ambient temperatures determined by resonant ultrasound spectroscopy
DOI:10.1063/1.3673820  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Pandey, Chandra Shekhar;Schreuer, Juergen;
7:1:137:9     Relaxor Behavior of Pure and Cerium Doped CaxBa1-xNb2O6
DOI:10.1080/00150193.2014.893152  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Pandey, C. S.;Schreuer, J.;Burianek, M.;Muehlberg, M.;
7:1:137:10     Correlation between dielectric properties and chemical composition of the tourmaline single crystals
DOI:10.1063/1.3646912  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Pandey, Chandra Shekhar;Jodlauk, Sven;Schreuer, Juergen;
7:1:138:1     Fabrication of [100]-oriented bismuth sodium titanate ceramics with small grain size and high density for piezoelectric materials
DOI:10.1016/j.jeurceramsoc.2013.11.031  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Hu, Dengwei;Mori, Kotaro;Kong, Xingang;Shinagawa, Kazunari;Wada, Satoshi;Feng, Qi;
7:1:138:2     Topochemical synthesis of plate-like Na0.5Bi0.5TiO3 templates from Bi4Ti3O12
DOI:10.1016/j.matlet.2010.02.037  JN:MATERIALS LETTERS  PY:2010
  TC:14  AU: Wu, Mengjia;Li, Yongxiang;
7:1:138:3     Solvothermal Soft Chemical Synthesis and Characterization of Nanostructured Ba1-x(Bi0.5K0.5)(x)TiO3 Platelike Particles with Crystal-Axis Orientation
DOI:10.1021/cm2015252  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:11  AU: Kong, Xingang;Hu, Dengwei;Ishikawa, Yoshie;Tanaka, Yasuhiro;Feng, Qi;
7:1:138:4     Effects of Bi3+ content and grain size on electrical properties of SrBi2Ta2O9 ceramic
DOI:10.1016/j.matlet.2012.02.043  JN:MATERIALS LETTERS  PY:2012
  TC:1  AU: Liu, Hairui;Li, Qiang;Ma, Jun;Chu, Xiangcheng;
7:1:138:5     Slurry Synthesis of Bismuth Sodium Titanate with a Transient Aurivillius-Type Structure
DOI:10.1111/j.1551-2916.2009.03488.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Qi, Jianquan;Sun, Li;Du, Peng;Li, Longtu;
7:1:138:6     Preparation of Crystal-Axis-Oriented Barium Calcium Titanate Plate-Like Particles and Its Application to Oriented Ceramic
DOI:10.1111/j.1551-2916.2011.04630.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:12  AU: Kong, Xingang;Ishikawa, Yoshie;Shinagawa, Kazunari;Feng, Qi;
7:1:138:7     Processing and Morphology of (111) BaTiO3 Crystal Platelets by a Two-Step Molten Salt Method
DOI:10.1111/j.1551-2916.2012.05124.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Lv, Danya;Zuo, Ruzhong;Su, Shi;
7:1:138:8     Effect of calcium on the structural properties of Ba(1-x)Ca (x) TiO3 particles synthesized by complex polymerization method
DOI:10.1007/s10853-013-7993-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:0  AU: Araujo, V. D.;Motta, F. V.;Marques, A. P. A.;Paskocimas, C. A.;Bomio, M. R. D.;Longo, E.;Varela, J. A.;
7:1:138:9     Characterization and dielectric behavior of a new dielectric ceramics MgTiO3-Ca0.8Sr0.2TiO3 at microwave frequencies
DOI:10.1016/j.jallcom.2010.01.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Pan, Chung-Long;Shen, Chun-Hsu;Chen, Ping-Cheng;Tan, Tsu-Chung;
7:1:138:10     Phase evolution, crystal structure and dielectric behavior of (1-x)Nd(Zn0.5Ti0.5)O-3 + xBi(Zn0.5Ti0.5)O-3 compound ceramics
DOI:10.1016/j.jallcom.2010.11.181  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Hu, Mingzhe;Luo, Chunya;Tian, Huyong;Gu, Haoshuang;
7:1:138:11     Electret state in Bi4Ti3O12 ceramics
DOI:10.1016/j.ceramint.2009.09.019  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:2  AU: Jovalekic, C.;Zdujic, M.;
7:1:139:1     High Tunability in (111)-Oriented Relaxor Pb0.8Ba0.2ZrO3 Thin Film with Antiferroelectric and Ferroelectric Two-Phase Coexistence
DOI:10.1111/jace.12269  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Peng, Biaolin;Fan, Huiqing;Zhang, Qi;
7:1:139:2     Tunable electric properties of PbZrO3 films related to the coexistence of ferroelectricity and antiferroelectricity at room temperature
DOI:10.1063/1.4720146  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Liu, Yaoyang;Lu, Xiaomei;Jin, Yaming;Peng, Song;Huang, Fengzhen;Kan, Yi;Xu, Tingting;Min, Kangli;Zhu, Jinsong;
7:1:139:3     High tunable dielectric response of Pb(0.87)Ba(0.1)La(0.02)(Zr(0.6)Sn(0.33)Ti(0.07))O(3) thin film
DOI:10.1063/1.3466754  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Correia, T. M.;Zhang, Q.;
7:1:139:4     High dielectric non-linear properties of the Pb[(Mg1/3Nb2/3)(0.8)(Sc1/2Nb1/2)(0.2)]O-3 ceramics
DOI:10.1016/j.materresbull.2012.04.006  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Peng, Biaolin;Fan, Huiqing;Li, Qiang;Zhang, Qi;
7:1:139:5     The Contribution of the "Extrinsic" Polarizations to the Dielectric Tunability of Pb(Mg1/3Nb2/3)1-xTixO3 Relaxor Ferroelectrics
DOI:10.1111/j.1551-2916.2011.05047.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Peng, Biaolin;Fan, Huiqing;Zhang, Qi;
7:1:139:6     High dielectric tunability of KTa0.60Nb0.40O3 single crystal
DOI:10.1063/1.4817493  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Li, Huan;Tian, Hao;Gong, Dewei;Meng, Qingxin;Zhou, Zhongxiang;
7:1:139:7     Bi-Tunable Dielectric Constant of Antiferroelectric PZT Ceramics Under DC Electric Field
DOI:10.1111/j.1551-2916.2012.05129.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Wang, Jinfei;Yang, Tongqing;Wei, Kun;Li, Gang;Chen, Shengchen;
7:1:139:8     Tunability properties in the paraelectric state of the Pb(Mg1/3Nb2/3)O-3 ceramics
DOI:10.1016/j.jeurceramsoc.2009.05.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Curecheriu, Lavinia P.;Ianculescu, Adelina;Mitoseriu, Liliana;
7:1:140:1     Crystallization Behavior and Dielectric Properties of Ferroelectric Glass-ceramics Containing BNN and NN Crystals
DOI:10.1080/00150193.2013.849526  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Niyompan, Anuson;Srisurat, Kanita;Tipakontitikul, Rungnapa;
7:1:140:2     Impedance Spectroscopy Studies of Fresnoites in BaO-TiO2-SiO2 System
DOI:10.1111/j.1551-2916.2009.03423.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Rangarajan, Badri;Bharadwaja, Srowthi S. N.;Furman, Eugene;Shrout, Thomas;Lanagan, Michael;
7:1:140:3     Crystallization and Dielectric Properties of Ferroelectric Glass-Ceramics Containing Sodium Niobate Crystals
DOI:10.1080/00150193.2013.846181  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Tipakontitikul, R.;Kamonlert, A.;Niyompan, A.;
7:1:140:4     Crystallization in Na2O-Nb2O5-Al2O3-SiO2 glass-ceramics system with partial replacement of SnO2 for Al2O3
DOI:10.1016/j.jcrysgro.2012.02.043  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:2  AU: Kongputhon, Pornpis;Niyompan, Anuson;Tipakontitikul, Rungnapa;
7:1:140:5     Influence of crystallization time on microstructures and dielectric properties of tungsten-bronze glass-ceramics
DOI:10.1007/s10853-011-6076-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:4  AU: Wang, Mengjie;Liu, Xiaolin;Wang, Xiangrong;Zhang, Yong;
7:1:140:6     Synthesis, Structural, and Electrical Properties of Ca-Modified Ba2TiSi2O8 Ceramics
DOI:10.1111/j.1551-2916.2010.04187.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Barbar, Shiv Kumar;Roy, M.;
7:1:140:7     X-ray, scanning electron microscopy and electrical properties of synthetic fresnoite (Ba2TiSi2O8) ceramics
DOI:10.1007/s00339-010-5749-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:9  AU: Roy, M.;Barbar, S. K.;Dave, P.;Jangid, S.;Bala, Indu;
7:1:140:8     Synthesis of Ba2TiOSi2O7 and Ba2TiOSi1.8Ge0.2O7 ferroelectric ceramics and the structure determination by Rietveld analysis
DOI:10.1016/j.ceramint.2011.04.018  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:0  AU: Barbar, Shiv Kumar;Roy, M.;
7:1:140:9     Formation and Dielectric Properties of NaNbO3 Phase in the Ferroelectric Glass-Ceramic Na2O-Nb2O5-Al2O3-SiO2 System with Addition of ZrO2
DOI:10.1080/00150191003711285  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Niyompan, A.;Thammarat, R.;Tipakontitikul, R.;
7:1:140:10     Dielectric investigation of sodium potassium niobate ceramic doped 7% of antimony
DOI:10.1016/j.ssi.2012.03.024  JN:SOLID STATE IONICS  PY:2012
  TC:1  AU: Bagdzevicius, Sarunas;Grigalaitis, Robertas;Banys, Juras;Sternberg, Andris;Bormanis, Karlis;
7:1:140:11     Testing media influences on the dielectric properties of lead sodium niobate glass-ceramics
DOI:10.1016/j.ceramint.2010.05.009  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:1  AU: Han, D. F.;Zhang, Q. M.;Tang, Q.;Luo, J.;Du, J.;
7:1:140:12     Dielectric Properties of Ferroelectric Glass-Ceramics of the Na2O-K2O-Nb2O5-Al2O3-SiO2 System with Partial Substitution of K2O for Na2O
DOI:10.1080/00150191003750960  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Kongputhon, P.;Niyompan, A.;Tipakontitikul, R.;
7:1:141:1     Phase composition, microstructure, and dielectric properties of dysprosium-doped Ba(Zr0.1Ti0.9)O-3-based Y5V ceramics with high permittivity
DOI:10.1016/j.ceramint.2014.03.177  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Wang, Yan;Cui, Bin;Zhang, Lulu;Hu, Zhenyu;Wang, Yaoyu;
7:1:141:2     Synthesis, structure, and dielectric properties of a novel perovskite-based nanopowders via sol-gel method: (1-x)BaTiO3-xDyScO(3)
DOI:10.1007/s10853-013-7203-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:1  AU: Xin, Chengrong;Zhang, Qilong;Hao, Yizhou;Zhang, Jian;Yang, Hui;
7:1:141:3     Microstructure and thermal properties of dysprosium and thulium co-doped barium titanate ceramics for high performance multilayer ceramic capacitors
DOI:10.1016/j.mseb.2011.07.001  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:10  AU: Kim, Jinseong;Kim, Dowan;Noh, Taimin;Ahn, Byungmin;Lee, Heesoo;
7:1:141:4     Deterioration behavior analysis of dysprosium and thulium co-doped barium titanate ceramics for multilayer ceramic capacitors
DOI:10.1016/j.ceramint.2012.05.083  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Kim, Jinseong;Noh, Taimin;Jeon, Seol;Park, Sanghu;Chun, Hohwan;Lee, Heesoo;
7:1:141:5     Sol-gel synthesis of A-site-ordered and homogeneous (Nd-0.55, Li-0.35)TiO3 ceramic and its dielectric properties
DOI:10.1016/j.scriptamat.2011.07.048  JN:SCRIPTA MATERIALIA  PY:2011
  TC:3  AU: Zhang, Qi-Long;Wu, Fei;Yang, Hui;
7:1:141:6     Broadband control of the viscoelasticity of ferroelectrics via domain switching
DOI:10.1063/1.4899055  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Wojnar, C. S.;le Graverend, J. -B.;Kochmann, D. M.;
7:1:141:7     Investigating the vibration damping behavior of barium titanate (BaTiO3) ceramics for use as a high damping reinforcement in metal matrix composites
DOI:10.1007/s10853-011-6080-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:4  AU: Asare, T. A.;Poquette, B. D.;Schultz, J. P.;Kampe, S. L.;
7:1:141:8     Solubility limits and microwave dielectric properties of Ba6-3xSm8+2xTi18O54 solid solution
DOI:10.1016/j.ceramint.2011.06.012  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:7  AU: Zhong, Li;Zhu, Xiao Li;Chen, Xiang Ming;Liu, Xiao Qiang;Li, Lei;
7:1:141:9     Substitutional analysis of perovskite-type dysprosium and thulium co-doped barium titanate ceramics by a near edge X-ray absorption fine structure
DOI:10.1016/j.matlet.2012.10.065  JN:MATERIALS LETTERS  PY:2013
  TC:3  AU: Kim, Jinseong;Lee, Heesoo;
7:1:141:10     Vibration and damping characteristics of cylindrical shells with active constrained layer damping treatments
DOI:10.1088/0964-1726/20/2/025008  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:3  AU: Zheng, Ling;Zhang, Dongdong;Wang, Yi;
7:1:141:11     A novel process to synthesize high-k 'Y5V' nanopowder and ceramics
DOI:10.1016/j.ceramint.2011.07.018  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Zhan, Xinxing;Cui, Bin;Xing, Yilin;Ma, Rong;Xie, Ying;Chang, Zhuguo;Zhang, Fengxing;
7:1:142:1     Control of domain configurations and sizes in crystallographically engineered ferroelectric single crystals: Phase field modeling
DOI:10.1063/1.3501139  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Rao, Wei-Feng;Xiao, Ke-Wei;Cheng, Tian-Le;Zhou, Jie E.;Wang, Yu U.;
7:1:142:2     Correlated inter-grain switching in polycrystalline ferroelectric thin films
DOI:10.1063/1.4896075  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Jing, Y.;Leach, S.;Garcia, R. E.;Blendell, J. E.;
7:1:142:3     Aging-stabilization of ferroelectric domains and internal electric field due to short-range ordering of charged point defects: Phase field modeling
DOI:10.1063/1.3371722  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Rao, Wei-Feng;Cheng, Tian-Le;Wang, Yu U.;
7:1:142:4     Edge and finite size effects in polycrystalline ferroelectrics
DOI:10.1016/j.actamat.2010.09.024  JN:ACTA MATERIALIA  PY:2011
  TC:3  AU: Leach, S. E.;Garcia, R. E.;Nagarajan, V.;
7:1:142:5     Aging-induced abnormality of dielectric response under dc bias in Ba(Zr, Ti)O-3 thin films
DOI:10.1007/s00339-010-6076-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:3  AU: Gao, C.;Yang, J.;Meng, X. J.;Lin, T.;Ma, J. H.;Sun, J. L.;Chu, J. H.;
7:1:142:6     Modeling 180 degrees Domain Switching Population Dynamics in Polycrystalline Ferroelectrics
DOI:10.1111/j.1551-2916.2011.05023.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Zhao, Zizhao;Bowman, Keith;Garcia, R. Edwin;
7:1:142:7     A quantitative model for stabilization effect induced by ferroelectric aging
DOI:10.1063/1.3596605  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Bao, Huixin;Xue, Dezhen;Wang, Yu;Gao, Jinghui;Zhang, Lixue;Yang, Sen;Yadav, K. L.;Ren, Xiaobing;
7:1:142:8     Correlated nucleation and self-accommodating kinetic pathway of ferroelectric phase transformation
DOI:10.1063/1.3677993  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Zhou, Jie E.;Cheng, Tian-Le;Wang, Yu U.;
7:1:142:9     Microstructural evolution of Mn-rich antiferromagnetic Mn-Cu alloy under temperature field
DOI:10.1063/1.3378810  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Man, J.;Zhang, J. H.;Rong, Y. H.;
7:1:142:10     Intrinsic origin of rubber-like behavior in thermoelastic alloys
DOI:10.1063/1.4807740  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Cui, Yanguang;Wan, Jianfeng;Man, Jiao;Zhang, Jihua;Rong, Yonghua;
7:1:142:11     Aging-induced two-step ferroelectric-to-paraelectric transition in acceptor-doped ferroelectrics
DOI:10.1063/1.3309697  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Gao, Jinghui;Xue, Dezhen;Bao, Huixin;Zhang, Lixue;Zhou, Chao;Liu, Wenfeng;Chen, Wei;Ren, Xiaobing;
7:1:142:12     Two-Step Ferroelectric to Paraelectric Transition Caused by Peak Aging
DOI:10.1080/00150191003670341  JN:FERROELECTRICS  PY:2010
  TC:0  AU: Gao, Jinghui;Xue, Dezhen;Bao, Huixin;Zhang, Lixue;Zhou, Chao;Liu, Wenfeng;Chen, Wei;Ren, Xiaobing;
7:1:143:1     Effects of superimposed electric field and porosity on the hydrostatic pressure-induced rhombohedral to orthorhombic martensitic phase transformation in PZT 95/5 ceramics
DOI:10.1016/j.actamat.2010.07.032  JN:ACTA MATERIALIA  PY:2010
  TC:15  AU: Hall, D. A.;Evans, J. D. S.;Covey-Crump, S. J.;Holloway, R. F.;Oliver, E. C.;Mori, T.;Withers, P. J.;
7:1:143:2     Effects of aging and annealing on the polar and antiferrodistortive components of the antiferroelectric transition in PbZr1-xTixO3
DOI:10.1103/PhysRevB.89.214102  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Cordero, F.;Trequattrini, F.;Craciun, F.;Galassi, C.;
7:1:143:3     Temperature dependent Raman scattering and far-infrared reflectance spectra of MgO modified Pb-0.99(Zr0.95Ti0.05)(0.98)Nb0.02O3 ceramics: A composition effect
DOI:10.1063/1.4894467  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Duan, Z. H.;Chang, P.;Hu, Z. G.;Wang, J. X.;Wang, G. S.;Dong, X. L.;Chu, J. H.;
7:1:143:4     Splitting of the transition to the antiferroelectric state in PbZr0.95Ti0.05O3 into polar and antiferrodistortive components
DOI:10.1103/PhysRevB.88.094107  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Cordero, F.;Craciun, F.;Trequattrini, F.;Galassi, C.;Thomas, P. A.;Keeble, D. S.;Glazer, A. M.;
7:1:143:5     Phenomenological description of depoling current in Pb0.99Nb0.02(Zr0.95Ti0.05)(0.98)O-3 ferroelectric ceramics under shock wave compression: Relaxation model
DOI:10.1063/1.4716461  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Jiang, Dongdong;Du, Jinmei;Gu, Yan;Feng, Yujun;
7:1:143:6     Microstructure, electrical and mechanical properties of MgO nanoparticles-reinforced porous PZT 95/5 ferroelectric ceramics
DOI:10.1016/j.ceramint.2012.10.238  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Wang, Junxia;Nie, Hengchang;Lan, Chunfeng;Wang, Genshui;Dong, Xianlin;Chen, Xuefeng;Cao, Fei;He, Hongliang;
7:1:143:7     Effect of MgO Nanoparticles on Properties of PZT Ceramics
DOI:10.1080/00150193.2011.577665  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Sanjoom, Kachaporn;Puchmark, Chompoonuch;
7:1:143:8     Peculiarities of Ferro-Antiferroelectric Phase Transitions 9. Can the Substances with Coexisting Ferroelectric and Antiferroelectric Phases Mimic the Dipole-Glass Behavior?
DOI:10.1080/00150193.2011.532074  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Ishchuk, V. M.;Sobolev, V. L.;
7:1:144:1     Dielectric and tunable properties of columnar Ba0.6Sr0.4TiO3-MgO composites prepared by spark plasma sintering
DOI:10.1063/1.3663566  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Liao, Wanfang;Liang, Ruihong;Wang, Genshui;Cao, Fei;Dong, Xianlin;
7:1:144:2     Controllable-permittivity and high-tunability of Ba0.5Sr0.5TiO3/MgO based ceramics by composite configuration
DOI:10.1063/1.4801777  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Tang, Linjiang;Wang, Jinwen;Zhai, Jiwei;Kong, Ling Bing;Yao, Xi;
7:1:144:3     Microstructure-Dielectric Properties Relationship in Ba0.6Sr0.4TiO3-Mg2SiO4-Al2O3 Composite Ceramics
DOI:10.1111/j.1551-2916.2009.03376.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Chen, Ying;Zhang, Yuan-Yuan;Dong, Xian-Lin;Wang, Gen-Shui;Cao, Fei;
7:1:144:4     Extremely High Tunability of Low Dielectric Constant 1-3 Type (Ba,Sr)TiO3/Resin Epoxy
DOI:10.1111/j.1551-2916.2012.05264.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Liang, Ruihong;Liao, Wanfang;Wu, Junwei;Cao, Fei;Dong, Xianlin;
7:1:144:5     Property optimization of Ba0.4Sr0.6TiO3-BaMoO4 composite ceramics for tunable microwave applications
DOI:10.1016/j.ceramint.2012.02.091  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Tang, Linjiang;Zhai, Jiwei;Shen, Bo;Yao, Xi;
7:1:144:6     Microwave dielectric properties of tunable Ba0.5Sr0.5TiO3 and scheelite AMoO(4) (A = Ba, Sr) composite ceramics
DOI:10.1016/j.jallcom.2012.10.189  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Tang, Linjiang;Zhai, Jiwei;Zhang, Haijun;Yao, Xi;
7:1:144:7     Microstructure and dielectric properties of Ba0.6Sr0.4TiO3-MgAl2O4 composite ceramics
DOI:10.1016/j.ceramint.2010.12.018  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:8  AU: Hu, Guoxin;Gao, Feng;Liu, Liangliang;Cao, Xiao;Liu, Zhengtang;
7:1:144:8     Ferroelectric-Dielectric Composites Model of Ba0.5Sr0.5TiO3/Mg(2)AO(4)(A = Ti, Si) for Tunable Application
DOI:10.1111/jace.12718  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Tang, Linjiang;Bian, Yanlong;Zhai, Jiwei;Zhang, Haijun;
7:1:144:9     Controllable-permittivity and high-tunability of Ba0.5Sr0.5TiO3/MgO based ceramics by composite configuration (vol 102, 142907, 2013)
DOI:10.1063/1.4803015  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Tang, Linjiang;Wang, Jinwen;Zhai, Jiwei;Kong, Ling Bing;Yao, Xi;
7:1:145:1     Taguchi based fuzzy logic optimization of multiple quality characteristics of cobalt disulfide nanostructures
DOI:10.1016/j.jallcom.2014.03.124  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Rajabloo, T.;Ghafarinazari, A.;Faraji, L. Seyed;Mozafari, M.;
7:1:145:2     The optimum conditions for preparing the lead-free piezoelectric ceramic of Bi0.5Na0.5TiO3 using the Taguchi method
DOI:10.1016/j.powtec.2010.01.015  JN:POWDER TECHNOLOGY  PY:2010
  TC:26  AU: Chou, Chuen-Shii;Yang, Ru-Yuan;Chen, Jin-Hsiang;Chou, Sheng-Wei;
7:1:145:3     Preparation and characterization of the lead-free piezoelectric ceramic of Bi0.5Na0.5TiO3 doped with CuO
DOI:10.1016/j.powtec.2011.03.019  JN:POWDER TECHNOLOGY  PY:2011
  TC:9  AU: Chou, Chuen-Shii;Liu, Ching-Liang;Hsiung, Chin-Min;Yang, Ru-Yuan;
7:1:145:4     Preparation and characterization of the bismuth sodium titanate (Na0.5Bi0.5TiO3) ceramic doped with ZnO
DOI:10.1016/j.apt.2011.04.015  JN:ADVANCED POWDER TECHNOLOGY  PY:2012
  TC:5  AU: Chou, Chuen-Shii;Wu, Chun-Yu;Yang, Ru-Yuan;Ho, Cheng-Yang;
7:1:145:5     The effects of MgO doping and sintering temperature on the microstructure of the lead-free piezoelectric ceramic of Bi0.5Na0.5TiO3
DOI:10.1016/j.powtec.2010.03.043  JN:POWDER TECHNOLOGY  PY:2010
  TC:9  AU: Chou, Chuen-Shii;Chen, Jin-Hsiang;Yang, Ru-Yuan;Chou, Sheng-Wei;
7:1:145:6     Synthesis of Pd/ZnO nanocomposites with high photocatalytic performance by a solvothermal method
DOI:10.1016/j.apsusc.2012.06.083  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:10  AU: Zhang, Yunyan;Wang, Qiuling;Xu, Jian;Ma, Shiyu;
7:1:145:7     Simulation of structural features on mechanochemical synthesis of Al2O3-TiB2 nanocomposite by optimized artificial neural network
DOI:10.1016/j.apt.2011.02.011  JN:ADVANCED POWDER TECHNOLOGY  PY:2012
  TC:6  AU: Nazari, Ali Ghafari;Mozafari, Masoud;
7:1:145:8     Antibacterial activity of silver photodeposited nepheline thin film coatings
DOI:10.1016/j.ceramint.2012.03.055  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Ghafari-Nazari, Ali;Moztarzadeh, Fathollah;Rabiee, Sayed Mahmood;Rajabloo, Talieh;Mozafari, Masoud;Tayebi, Lobat;
7:1:146:1     Crack-free nanostructured BaTiO3 thin films prepared by sol-gel dip-coating technique
DOI:10.1016/j.ceramint.2014.01.078  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:13  AU: Ashiri, R.;Nemati, A.;Ghamsari, M. Sasard;
7:1:146:2     A modified method for barium titanate nanoparticles synthesis
DOI:10.1016/j.materresbull.2011.08.055  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:18  AU: Ashiri, R.;Nemati, Ali;Ghamsari, M. Sasani;Sanjabi, S.;Aalipour, M.;
7:1:146:3     Application of scanning microscopy to study correlation between thermal properties and morphology of BaTiO3 thin films
DOI:10.1016/j.tsf.2013.08.007  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Kazmierczak-Balata, Anna;Bodzenta, Jerzy;Krzywiecki, Maciej;Juszczyk, Justyna;Szmidt, Jan;Firek, Piotr;
7:1:146:4     Low Temperature Synthesis of Carbonate-Free Barium Titanate Nanoscale Crystals: Toward a Generalized Strategy of Titanate-Based Perovskite Nanocrystals Synthesis
DOI:10.1111/jace.13023  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:8  AU: Ashiri, Rouholah;Moghtada, Abdolmajid;Shahrouzianfar, Ali;Ajami, Reza;
7:1:146:5     Development and investigation of novel nanoparticle embedded solutions with enhanced optical transparency
DOI:10.1557/jmr.2014.351  JN:JOURNAL OF MATERIALS RESEARCH  PY:2014
  TC:3  AU: Ashiri, Rouholah;
7:1:146:6     Synthesis and Properties of BaTiO3 Nanopowders
DOI:10.1111/j.1551-2916.2010.04049.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Sarkar, Debasish;
7:1:146:7     Pulsed laser deposition of semiconducting crystalline double-doped barium titanate thin films on nickel substrates
DOI:10.1016/j.apsusc.2010.11.078  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:2  AU: Apostol, I.;Stefan, N.;Luculescu, C. R.;Birjega, R.;Socol, M.;Miroiu, M.;Mihailescu, I. N.;
7:1:146:8     Solar physical vapor deposition: A new approach for preparing magnesium titanate nanopowders
DOI:10.1016/j.apsusc.2013.07.155  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:0  AU: Apostol, Irina;Venkata Saravanan, K.;Monty, Claude J. A.;Vilarinho, Paula M.;
7:1:146:9     Sonochemical Synthesis of Spherical BaTiO3 Nanoparticles
DOI:10.1080/00150193.2013.847332  JN:FERROELECTRICS  PY:2013
  TC:5  AU: Vuttivong, Sirajit;Niemcharoen, Surasak;Seeharaj, Panpailin;Vittayakorn, Wanwilai C.;Vittayakorn, Naratip;
7:1:146:10     Photoluminescence activity of Ba1-xCaxTiO3: dependence on particle size and morphology
DOI:10.1039/c4tc00897a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:2  AU: Souza, Agda Eunice;Teixeira, Silvio Rainho;Morilla-Santos, Cassio;Schreiner, Wido Herwig;Lisboa Filho, Paulo Noronha;Longo, Elson;
7:1:146:11     Preparation of Nanocrystalline BaTiO3 Powders, Fibers, and Thin Films From the Same Precursor Solution
DOI:10.1111/j.1551-2916.2010.03644.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Das, Rabindra N.;Pramanik, P.;
7:1:146:12     Electronic properties of BaTiO3/4H-SiC interface
DOI:10.1016/j.mseb.2010.08.012  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:2  AU: Sochacki, M.;Firek, P.;Kwietniewski, N.;Szmidt, J.;Rzodkiewicz, W.;
7:1:147:1     Enhanced electric field induced strain in SrTiO3 modified (K, Na) NbO3-based piezoceramics
DOI:10.1016/j.jallcom.2014.02.185  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Bafandeh, Mohammad Reza;Gharahkhani, Raziyeh;Lee, Jae-Shin;
7:1:147:2     Piezoelectric and ferroelectric properties of CN-doped K0.5Na0.5NbO3 lead-free ceramics
DOI:10.1063/1.3493732  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Yang, Ming-Ru;Tsai, Cheng-Che;Hong, Cheng-Shong;Chu, Sheng-Yuan;Yang, Song-Ling;
7:1:147:3     Effect of cobalt doping on the sintering mechanisms of the lead-free piezoceramic (Bi0.5Na0.5)TiO3
DOI:10.1016/j.jeurceramsoc.2013.07.021  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Schmitt, V.;Raether, F.;
7:1:147:4     Effects of Non-Stoichiometry on the Microstructure, Oxygen Vacancies, and Piezoelectric Properties of CuTa2O6-Doped NKN Ceramics
DOI:10.1111/jace.12418  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Yang, Song-Ling;Tsai, Cheng-Che;Liou, Yi-Cheng;Hong, Cheng-Shong;Chu, Sheng-Yuan;
7:1:147:5     Microstructure and Hardening Mechanism of K0.5Na0.5NbO3 Lead-Free Ceramics with CuO Doping Sintered in Different Atmospheres
DOI:10.1111/j.1551-2916.2012.05098.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Wang, Hong-Qiang;Dai, Ye-Jing;Zhang, Xiao-Wen;
7:1:147:6     Influence of Li and La content on phase structures and electrical properties of K0.5Na0.5NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2013.06.139  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Rai, Radheshyam;Rani, Rashmi;Sharma, Seema;Kholkin, Andrei L.;
7:1:147:7     Effects of sintering aid CuTa2O6 on piezoelectric and dielectric properties of sodium potassium niobate ceramics
DOI:10.1016/j.materresbull.2012.01.009  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Yang, Song-Ling;Tsai, Cheng-Che;Hong, Cheng-Shong;Chu, Sheng-Yuan;
7:1:147:8     MnO2-Modified Ba(Ti,Zr)O-3 Ceramics with High Q (m) and Good Thermal Stability
DOI:10.1007/s11664-013-2543-x  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:3  AU: Zheng, P.;Zhang, J. L.;Qin, H. B.;Song, K. X.;Wu, J.;Ying, Z. H.;Zheng, L.;Deng, J. X.;
7:1:148:1     Percolative BaTiO3-Ni composite nanopowders from alkoxide-mediated synthesis
DOI:10.1016/j.jeurceramsoc.2009.06.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Yoon, Songhak;Dornseiffer, Juergen;Schneller, Theo;Hennings, Detlev;Iwaya, Shoichi;Pithan, Christian;Waser, Rainer;
7:1:148:2     Synthesis, spark plasma sintering and electrical conduction mechanism in BaTiO3-Cu composites
DOI:10.1016/j.jeurceramsoc.2010.11.012  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Yoon, Songhak;Dornseiffer, Juergen;Xiong, Yan;Gruner, Daniel;Shen, Zhijian;Iwaya, Shoichi;Pithan, Christian;Waser, Rainer;
7:1:148:3     Electronic Conduction Mechanisms in BaTiO3-Ni Composites with Ultrafine Microstructure Obtained by Spark Plasma Sintering
DOI:10.1111/j.1551-2916.2010.04011.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Yoon, Songhak;Pithan, Christian;Waser, Rainer;Dornseiffer, Juergen;Xiong, Yan;Gruner, Daniel;Shen, Zhijian;Iwaya, Shoichi;
7:1:148:4     Growth, structure and dielectric characteristics of Ba[(Fe1/2Nb1/2)(0.1)Ti-0.9]O-3 thin films by pulsed laser deposition
DOI:10.1063/1.4789820  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Zhang, Wei;Li, Lei;Chen, Xiang Ming;
7:1:148:5     Characteristics of Ag-doped BaTiO3 nanopowders prepared by spray pyrolysis
DOI:10.1016/j.ceramint.2011.10.044  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Ko, You Na;Kang, Yun Chan;
7:1:148:6     Synthesis, sintering and dielectric properties of a BaTiO3-Ni composite
DOI:10.1016/j.ceramint.2013.12.075  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Saleem, M.;Kim, I. S.;Song, J. S.;Jeong, S. J.;Kim, M. S.;Yoon, S.;
7:1:148:7     Metallic electrolyte composites in the framework of the brick-layer model
DOI:10.1016/j.jeurceramsoc.2011.10.017  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:0  AU: Lustfeld, H.;Pithan, C.;Reissel, M.;
7:1:148:8     Nano-sized Ag-BaTiO3 composite powders with various amount of Ag prepared by spray pyrolysis
DOI:10.1016/j.jeurceramsoc.2012.11.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Ko, You Na;Choi, Seung Ho;Kang, Yun Chan;
7:1:148:9     Microstructure and electrical properties of BaTiO3/Cu ceramic composite sintered in nitrogen atmosphere
DOI:10.1016/j.ceramint.2011.04.094  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Xu, Ning;Pu, Yong-Ping;Wang, Bo;Wu, Hai-Dong;Chen, Kai;
7:1:148:10     Enhanced mechanical and dielectric behavior of BaTiO3/Cu composites
DOI:10.1016/j.ceramint.2011.06.048  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Xu Ning;Pu Yongping;Wang Bo;Wu Haidong;Chen Kai;
7:1:149:1     Phase Characteristics and Piezoelectric Properties in the Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3 System
DOI:10.1111/j.1551-2916.2009.03592.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Zhang, Shan-Tao;Wang, Lei;Chen, Yan-Feng;Kounga, Alain Brice;
7:1:149:2     Structure, Ferroelectric, and Piezoelectric Properties of (Bi0.5Na0.5)(1-x-y-z)(Bi0.5K0.5)(x)BaySrzTiO3 Lead-Free Ceramics
DOI:10.1111/j.1551-2916.2009.03473.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Lin, Dunmin;Kwok, Kin Wing;
7:1:149:3     Dielectric, ferroelectric and piezoelectric properties of Bi0.5Na0.5TiO3-(Ba0.7Ca0.3)TiO3 ceramics at morphotropic phase boundary composition
DOI:10.1016/j.mseb.2010.12.007  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:7  AU: Yang, Jingna;Liu, Peng;Bian, Xiaobing;Jing, Huixia;Wang, Yajuan;Zhang, Yu;Wu, Yi;Song, Wuhui;
7:1:149:4     Piezoelectric properties of lead-free submicron-structured (Bi0.5Na0.5)(0.94)Ba0.06TiO3 ceramics from nanopowders
DOI:10.1088/0964-1726/19/11/115007  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:6  AU: Pardo, Lorena;Garcia, Alvaro;Brebol, Klaus;Mercadelli, Elisa;Galassi, Carmen;
7:1:149:5     Synthesis of nano-crystalline potassium sodium niobate ceramic using mechanochemical activation
DOI:10.1016/j.ceramint.2014.03.047  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Singh, Rajan;Patro, Pankaj K.;Kulkarni, A. R.;Harendranath, C. S.;
7:1:149:6     Microstructure and Dielectric Properties of BCZT-NBT Ceramics
DOI:10.1080/00150193.2013.850314  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Zhang, Donghui;Zhang, Yueli;Yang, Shenghong;
7:1:149:7     Microstructural effects on the phase transitions and the thermal evolution of elastic and piezoelectric properties in highly dense, submicron-structured NaNbO3 ceramics
DOI:10.1007/s10853-009-4067-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:7  AU: Moure, A.;Hungria, T.;Castro, A.;Pardo, L.;
7:1:149:8     Synthesis of NiCuZn-ferrite powders by means of mechanochemical treatment
DOI:10.1016/j.materresbull.2013.05.048  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:2  AU: Luo, Juhua;
7:1:150:1     Low loss microwave ferroelectric ceramics for high power tunable devices
DOI:10.1016/j.jeurceramsoc.2009.04.008  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:23  AU: Nenasheva, E. A.;Kartenko, N. F.;Gaidamaka, I. M.;Trubitsyna, O. N.;Redozubov, S. S.;Dedyk, A. I.;Kanareykin, A. D.;
7:1:150:2     Nanocrystalline Barium Strontium Titanate Ceramics Synthesized via the "Organosol" Route and Spark Plasma Sintering
DOI:10.1111/jace.12933  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Gao, Yanling;Shvartsman, Vladimir V.;Gautam, Devendraprakash;Winterer, Markus;Lupascu, Doru C.;
7:1:150:3     The effect of Bi1.5Zn0.5Nb0.5Ti1.5O7 cover layer on the dielectric and tunable properties of Ba0.6Sr0.4TiO3/Bi1.5Zn0.5Nb0.5Ti1.5O7 bilayered thin films
DOI:10.1016/j.mseb.2013.08.009  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:0  AU: Sun, Xiaohua;Yang, Ying;Zhang, Qiaoling;Luo, Zhimeng;Hou, Shuang;Huang, Caihua;Zou, Jun;
7:1:150:4     Effect of Zn Doping on the Microstructures and Dielectric Properties of BaTi0.9Sn0.1O3 Ceramics
DOI:10.1080/00150193.2011.554265  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Fu, Chunlin;Yang, Jing;Cai, Wei;Deng, Xiaoling;
7:1:150:5     Sinterability and dielectric properties of Ba0.55Sr0.4Ca0.05TiO3-CaTiSiO5-Mg2TiO4 composite ceramics
DOI:10.1016/j.jallcom.2011.08.066  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Jia, Qianqian;Ji, Huiming;Li, Xiaolei;Liu, Shan;Jin, Zhengguo;
7:1:150:6     Optical tuning of dielectric properties of Ba0.6Sr0.4TiO3-La(Mg0.5Ti0.5)O-3 ceramics in the terahertz range
DOI:10.1063/1.4829479  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Wu, Liang;Jiang, Linkun;Xu, Yebin;Ding, Xin;Yao, Jianquan;
7:1:150:7     Experimental Demonstration of Wakefield Acceleration in a Tunable Dielectric Loaded Accelerating Structure
DOI:10.1103/PhysRevLett.106.164802  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:1  AU: Jing, C.;Kanareykin, A.;Power, J. G.;Conde, M.;Liu, W.;Antipov, S.;Schoessow, P.;Gai, W.;
7:1:150:8     Stoichiometry and Grain Boundaries Control by Spark Plasma Sintering in Ba0.6Sr0.4TiO3:Mn/MgO Composites
DOI:10.1111/j.1551-2916.2012.05311.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Elissalde, Catherine;Chung, U-Chan;Artemenko, Alla;Estournes, Claude;Costes, Romain;Pate, Michel;Ganne, Jean-Pierre;Waechter, Sabine;Maglione, Mario;
7:1:150:9     Solvothermal synthesis and Curie temperature of monodispersed barium titanate nanoparticles
DOI:10.1016/j.matchemphys.2010.08.063  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:6  AU: Mao, Yanping;Mao, Shaoyu;Ye, Zuo-Guang;Xie, Zhaoxiong;Zheng, Lansun;
7:1:150:10     The Influence of the "Heating-Cooling" Process Rate on the Temperature Hysteresis of Ferroelectric Capacitor Structures
DOI:10.1080/00150193.2013.823315  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Dedyk, A. I.;Pavlova, Yu V.;Semenov, A. A.;Es'kov, A. V.;Beliavskiy, P. Yu;Mylnikov, I. L.;Pakhomov, O. V.;Starkov, A. S.;Starkov, I. A.;
7:1:150:11     Anomalous Correlation between Dielectric Constant and Tunability in (Ba, Sr)TiO3-MgO-Mg2SiO4 Composite Ceramics
DOI:10.1111/jace.12167  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: He, Yanyan;Zhao, Jingyuan;Xu, Yebin;Li, Changnian;
7:1:151:1     Low shear compounding process for thermoplastic fabrication of ferroelectric lead-free fibres
DOI:10.1016/j.jeurceramsoc.2014.02.036  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Lusiola, T.;Scharf, D.;Graule, T.;Clemens, F.;
7:1:151:2     A new measurement method of piezoelectric properties of single ceramic fibres
DOI:10.1016/j.jeurceramsoc.2009.06.013  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Steinhausen, R.;Kern, S.;Pientschke, C.;Beige, H.;Clemens, F.;Heiber, J.;
7:1:151:3     Tape cast porosity-graded piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2009.12.004  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Mercadelli, E.;Sanson, A.;Pinasco, P.;Roncari, E.;Galassi, C.;
7:1:151:4     Ferroelectric and electromechanical property characterization of single Pb(ZrTi)O-3 fiber resonator
DOI:10.1063/1.3280036  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Sun, Chengliang;Qin, Lifeng;Xue, Hao;Xiong, Zhaoxian;Wang, Qing-Ming;
7:1:151:5     Fabrication, characterization, and modeling of piezoelectric fiber composites
DOI:10.1063/1.4812224  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Lin, Xiujuan;Zhou, Kechao;Button, Tim W.;Zhang, Dou;
7:1:151:6     Effects of different thermoplastic binders on the processability of feedstocks for ceramic co-extrusion process
DOI:10.1016/j.ceramint.2011.05.084  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:6  AU: Ismael, M. R.;Clemens, F.;Graule, T.;Hoffmann, M. J.;
7:1:151:7     Preparation of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) feedstocks with different thermoplastic binders and their use in the production of thin tubular membranes by extrusion
DOI:10.1016/j.ceramint.2013.12.014  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Cruz, R. T.;Braganca, S. R.;Bergmann, C. P.;Graule, T.;Clemens, F.;
7:1:151:8     Alternative production route for supporting La0.8Sr0.2MnO3-delta-Ce0.8Gd0.2O2-delta (LSM-GDC)
DOI:10.1016/j.ijhydene.2012.02.091  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2012
  TC:4  AU: Gondolini, A.;Mercadelli, E.;Pinasco, P.;Zanelli, C.;Melandri, C.;Sanson, A.;
7:1:151:9     Effects of A-Site Nonstoichiometry on Dielectric and Piezoelectric Properties of Pb-Free (Na0.53+xK0.47)(Nb0.55Ta0.45)O-3 Ceramics
DOI:10.1080/10584587.2012.664077  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Lee, J. H.;Ryu, G. H.;Do, D.;Song, T. K.;Kim, M. H.;Park, T. G.;Kim, W. J.;Kim, S. S.;Sung, Y. S.;Baik, S.;
7:1:151:10     Processing and Properties of Co-Extruded Lead Zirconate Titanate Fibers
DOI:10.1111/j.1551-2916.2011.04851.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Ismael, Marina R.;Clemens, Frank;Wyss, Peter;Graule, Thomas;Hoffmann, Michael J.;
7:1:151:11     Enhanced piezoelectric properties of lead zirconate titanate sol-gel derived ceramics using single crystal PbZr0.52Ti0.48O3 cubes
DOI:10.1063/1.3481454  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Lin, Yirong;Andrews, Clark;Sodano, Henry A.;
7:1:151:12     Modelling of the measured longitudinal piezoelectric coefficient of single ceramic fibres with annular electrodes
DOI:10.1088/0964-1726/20/5/055015  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:0  AU: Pientschke, Christoph;Steinhausen, Ralf;Kern, Sabine;Beige, Horst;
7:1:151:13     Embossing of ceramic micro-pillar arrays
DOI:10.1016/j.jeurceramsoc.2012.04.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Su, B.;Zhang, D.;Button, T. W.;
7:1:152:1     Fabrication of BaTiO3 nanoparticles and its formation mechanism using the high temperature mixing method under hydrothermal conditions
DOI:10.1016/j.apt.2013.12.012  JN:ADVANCED POWDER TECHNOLOGY  PY:2014
  TC:4  AU: Cao, Yang;Zhu, Kongjun;Liu, Jinsong;Qiu, Jinhao;
7:1:152:2     Piezoelectric and ferroelectric properties of K0.5Na0.5NbO3 ceramics synthesized by spray drying method
DOI:10.1016/j.materresbull.2010.09.034  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:10  AU: Lopez, Rigoberto;Gonzalez, Federico;Cruz, M. P.;Villafuerte-Castrejon, M. E.;
7:1:152:3     Microwave Synthesis of Noncentrosymmetric BaTiO3 Truncated Nanocubes for Charge Storage Applications
DOI:10.1021/am1004865  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2010
  TC:15  AU: Swaminathan, V.;Pramana, Stevin S.;White, T. J.;Chen, L.;Chukka, Rami;Ramanujan, R. V.;
7:1:152:4     Synthesis of (K, Na)NbO3 particles by high temperature mixing method under hydrothermal conditions
DOI:10.1016/j.matlet.2009.10.013  JN:MATERIALS LETTERS  PY:2010
  TC:11  AU: Bai, Lin;Zhu, Kongjun;Su, Likui;Qiu, Jinhao;Ji, Hongli;
7:1:152:5     Electromechanical Properties and Microstructure Evolution of BNT-BT Piezoelectric Ceramics
DOI:10.1080/00150193.2010.482456  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Shi, Jing;Fan, Huiqing;Li, Zhuo;
7:1:152:6     Characterization and synthesis of KTa0.1Nb0.9O3 particles via high temperature mixing method under hydrothermal conditions
DOI:10.1016/j.apt.2011.06.001  JN:ADVANCED POWDER TECHNOLOGY  PY:2012
  TC:2  AU: Gu, Honghui;Zhu, Kongjun;Qiu, Jinhao;Cao, Yang;Ji, Hongli;
7:1:152:7     Barium zirconate titanate nanoparticles synthesized by the sonochemical method
DOI:10.1016/j.ceramint.2012.10.135  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Seeharaj, Panpailin;Boonchom, Banjong;Charoonsuk, Piyanut;Kim-Lohsoontorn, Pattaraporn;Vittayakorn, Naratip;
7:1:152:8     Preparation and characterization of monodispersed BaTiO3 nanocrystals by sol-hydrothemal method
DOI:10.1016/j.jcrysgro.2012.11.019  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:8  AU: Zheng, Hongjuan;Zhu, Kongjun;Wu, Qingliu;Liu, Jinsong;Qiu, Jinhao;
7:1:152:9     The Influence of Firing Temperatures on the Crystal Structure, Microstructure and Dielectric Properties of 0.79Bi(0.5)Na(0.5)TiO(3)-0.18Bi(0.5)K(0.5)TiO(3)-0.03BiFeO(3) Ceramics Prepared via the Combustion Technique
DOI:10.1080/00150193.2013.843340  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Sumang, Rattiphorn;Bongkarn, Theerachai;
7:1:152:10     Nanocomposite thin films for miniaturized multi-layer ceramic capacitors prepared from barium titanate nanoparticle based hybrid solutions
DOI:10.1039/c1jm10607d  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:4  AU: Schneller, Theodor;Halder, Sandip;Waser, Rainer;Pithan, Christian;Dornseiffer, Juergen;Shiratori, Yosuke;Houben, Lothar;Vyshnavi, Narayanan;Majumder, Subhasish B.;
7:1:152:11     Effect of Calcination Temperature and Content of x and y on Crystal Structure and Microstructure of (1-x-y) Bi0.5Na0.5TiO3-xBi(0.5)K(0.5)TiO(3)-yBiFeO(3) Powders near MPB Prepared via the Combustion Technique
DOI:10.1080/10584587.2013.852030  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Sumang, Rattiphorn;Bongkarn, Theerachai;
7:1:153:1     Effect of mechanical activation on the structure and ferroelectric property of Na0.5K0.5NbO3
DOI:10.1016/j.materresbull.2011.05.001  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:9  AU: Liu, Laijun;Wu, Meixia;Huang, Yanmin;Fang, Liang;Fan, Huiqing;Dammak, Hichem;Thi, Mai Pham;
7:1:153:2     Molten salt synthesis of PZT powder for direct write inks
DOI:10.1016/j.jeurceramsoc.2010.04.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:21  AU: Bortolani, Francesca;Dorey, Robert A.;
7:1:153:3     Structural, microstructural and thermal properties of lead-free bismuth-sodium-barium-titanate piezoceramics synthesized by mechanical alloying
DOI:10.1016/j.materresbull.2012.11.008  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Amini, Rasool;Ghazanfari, Mohammad Reza;Alizadeh, Morteza;Ardakani, Hamed Ahmadi;Ghaffari, Mohammad;
7:1:153:4     Synthesis and piezoelectric properties of KxNa1-xNbO3 ceramic by molten salt method
DOI:10.1016/j.jallcom.2010.01.139  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Li, Yueming;Wang, Jinsong;Liao, Runhua;Huang, Dan;Jiang, Xiangping;
7:1:153:5     Molten hydroxide synthesis as an alternative to molten salt synthesis for producing K0.5Na0.5NbO3 lead free ceramics
DOI:10.1007/s10853-011-5984-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:6  AU: Lusiola, Tony;Bortolani, Francesca;Zhang, Qi;Dorey, Robert;
7:1:153:6     X-ray diffraction and dielectric studies across morphotropic phase boundary in (1-x) [Pb(Mg0.5W0.5)O-3]-xPbTiO(3) ceramics
DOI:10.1016/j.jallcom.2011.02.027  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Singh, A. K.;Singh, Akhilesh Kumar;
7:1:153:7     Effects of the sintering temperature on the diffused phase transition and the spin-glassy behavior in Pb(0.95)La(0.05)(Fe(2/3)W(1/3))(0.65)Ti(0.35)O(3) ceramics
DOI:10.1063/1.3415529  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Hong, Cheng-Shong;Chu, Sheng-Yuan;Hsu, Chi-Cheng;
7:1:153:8     Na0.5K0.5NbO3 and 0.9Na(0.5)K(0.5)NbO(3)-0.1Bi(0.5)Na(0.5)TiO(3) nanocrystalline powders synthesized by low-temperature solid-state reaction
DOI:10.1016/j.apt.2013.01.001  JN:ADVANCED POWDER TECHNOLOGY  PY:2013
  TC:2  AU: Liu, Laijun;Zheng, Shaoying;Huang, Ruijing;Shi, Danping;Huang, Yanmin;Wu, Shuangshuang;Li, Yunhua;Fang, Liang;Hu, Changzheng;
7:1:153:9     Dielectric and Piezoelectric Properties of (1-x)[Pb(Mg0.5W0.5)O-3]-xPbTiO(3) Ceramics
DOI:10.1080/10584587.2010.503524  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Singh, A. K.;Singh, Akhilesh Kumar;
7:1:154:1     Influence of small DC bias field on the electrical behaviour of Sr- and Mg-doped lanthanum gallate
DOI:10.1007/s00339-014-8332-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Raghvendra;Singh, Rajesh Kumar;Singh, Prabhakar;
7:1:154:2     Impedance spectroscopic studies of sol-gel derived barium strontium titanate thin films
DOI:10.1016/j.jeurceramsoc.2009.06.036  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:27  AU: Czekaj, D.;Lisinska-Czekaj, A.;Orkisz, T.;Orkisz, J.;Smalarz, G.;
7:1:154:3     Effects of CaZrO3 on X8R Nonreducible BaTiO3-Based Dielectric Ceramics
DOI:10.1111/j.1551-2916.2011.04563.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:14  AU: Yao, Guofeng;Wang, Xiaohui;Sun, Tieyu;Li, Longtu;
7:1:154:4     Thermal ageing of nanostructured tetragonal zirconia ceramics: Characterization of interfaces
DOI:10.1016/j.jeurceramsoc.2009.05.004  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Rocha, R. A.;Muccillo, E. N. S.;Dessemond, L.;Djurado, E.;
7:1:154:5     The impedance analysis for the aging mechanism of CaO excess type calcium zirconate electrolyte material comparing with 8.5 YSZ
DOI:10.1016/j.ssi.2014.04.010  JN:SOLID STATE IONICS  PY:2014
  TC:0  AU: Li, Hui-Yu;Guo, Xing-Min;
7:1:154:6     Effect of DC bias on electrical conductivity of nanocrystalline alpha-CuSCN
DOI:10.1063/1.3583601  JN:AIP ADVANCES  PY:2011
  TC:3  AU: Prakash, T.;Ramasamy, S.;Murty, B. S.;
7:1:154:7     Microwave sintering of dielectric CaCu3Ti4O12: An interfacial conductance and dipole relaxation effect
DOI:10.1016/j.jallcom.2012.07.052  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Kumar, Ranjit;Zulfequar, M.;Singh, V. N.;Tawale, J. S.;Senguttuvan, T. D.;
7:1:154:8     Influence of Grain and Grain-Boundary Resistances on Dielectric Properties of KNbO3 Under Small DC Bias Field
DOI:10.1111/jace.12466  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Sharath, Sankaramangalam Ulhas;Singh, Rajesh Kumar;Raghvendra;Singh, Bheeshma Pratap;Kumar, Pravin;Singh, Prabhakar;
7:1:154:9     Correlation between the chemical composition and the conduction mechanism of barium strontium titanate thin films
DOI:10.1016/j.jallcom.2011.04.068  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Saif, Ala'eddin A.;Poopalan, P.;
7:1:154:10     On the use of the constant phase element to understand variation in grain boundary properties
DOI:10.1016/j.ssi.2013.12.030  JN:SOLID STATE IONICS  PY:2014
  TC:2  AU: McNealy, Benjamin E.;Hertz, Joshua L.;
7:1:154:11     Structural, dielectric and ac conductivity properties of Ni-doped HoFeO3 before and after gamma irradiation
DOI:10.1007/s00339-014-8228-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Habib, Zubida;Ikram, M.;Majid, Kowsar;Asokan, K.;
7:1:154:12     Low temperature synthesis of ultrafine non vermicular alpha-alumina from aerosol decomposition of aluminum nitrates salts
DOI:10.1016/j.jeurceramsoc.2013.01.035  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Aman, Yann;Rossignol, Cecile;Garnier, Vincent;Djurado, Elisabeth;
7:1:154:13     Electric Properties of La3+ Doped BaTiO3 Ceramics
DOI:10.1080/00150193.2011.578988  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Wodecka-Dus, B.;Czekaj, D.;
7:1:155:1     Microwave-assisted synthesis and sintering of potassium sodium niobate lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2013.06.081  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Feizpour, Mahdi;Bafrooei, Hadi Barzegar;Hayati, Roghayeh;Ebadzadeh, Touradj;
7:1:155:2     The fine-grained KNN-LN ceramics densified from nanoparticles obtained by an economical sol-gel route
DOI:10.1016/j.matchemphys.2012.03.026  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:4  AU: Hou, Yudong;Wang, Chao;Zhao, Jingli;Ge, Haiyan;Zhu, Mankang;Yan, Hui;
7:1:155:3     Preparation of Phase-Pure K0.5Na0.5NbO3 Fine Powders by a Solid-State Reaction at 625 degrees C from a Precursor Comprising Nb2O5 and K, Na Acetates
DOI:10.1111/jace.12727  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Senna, Mamoru;Pavlic, Jernej;Rojac, Tadej;Malic, Barbara;Kosec, Maria;
7:1:155:4     Effect of sintering temperature on ferroelectric properties of 0.94(K0.5Na0.5)NbO3-0.06LNbO(3) system
DOI:10.1016/j.ceramint.2010.02.014  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:14  AU: Kumar, P.;Palei, P.;
7:1:155:5     Synthesis of size controlled phase pure KNbO3 fine particles via a solid-state route from a core-shell structured precursor
DOI:10.1016/j.ceramint.2011.10.018  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Kinoshita, Tamiko;Senna, Mamoru;Doshida, Yutaka;Kishi, Hiroshi;
7:1:155:6     Synthesis of potassium niobate (KNbO3) nano-powder by a modified solid-state reaction
DOI:10.1007/s10853-010-4967-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:3  AU: Chaiyo, Nopsiri;Ruangphanit, Anucha;Muanghlua, Rangson;Niemcharoen, Surasak;Boonchom, Banjong;Vittayakorn, Naratip;
7:1:155:7     Enhanced Structures and Electrical Properties of Lead-Free K0.5Na0.5NbO3-Bi0.5Na0.5TiO3 0-3 Composite Ferroelectric Thick Films
DOI:10.1111/j.1551-2916.2011.04524.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Ji, Hongfen;Ren, Wei;Wang, Lingyan;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;Lau, Sien-Ting;Zhou, Qifa;Shung, K. Kirk;
7:1:155:8     Synthesis and Morphology of KNbO3 Powders via Hydrothermal Method
DOI:10.1080/10584587.2013.852915  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Vuttivong, Sirajit;Vittayakorn, Naratip;
7:1:155:9     Dielectric and ferroelectric study of KNN modified NBT ceramics synthesized by microwave processing technique
DOI:10.1016/j.ceramint.2012.10.005  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Swain, Sridevi;Kumar, Pawan;Agrawal, Dinesh K.;Sonia;
7:1:155:10     Improved piezoelectric properties of lead-free (1-x)(Na-0.K-5(0.5))NbO3-x (Ba0.95Sr0.05)TiO3 ceramics by particle size control
DOI:10.1016/j.ceramint.2014.04.041  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Ha, Jong-Yoon;Choi, Ji-Won;
7:1:155:11     Mechanochemical Synthesis of KxNa1-xNbO3 Powders
DOI:10.1080/00150191003676959  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Zhu, Jingxian;Li, Zhenrong;Xu, Zhuo;Yao, Xi;
7:1:156:1     Low-temperature preparation and characterization of the PZT ferroelectric thin films sputtered on FTO glass substrate
DOI:10.1016/j.jallcom.2013.08.197  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Wang, Z. D.;Lai, Z. Q.;Hu, Z. G.;
7:1:156:2     Preparation of ferroelectric BaTi2O5 thin films on Pt(111)/Ti/SiO2/Si substrates by pulsed laser deposition
DOI:10.1016/j.jallcom.2011.09.049  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Wang, Junjun;Wang, Chuanbin;Shen, Qiang;Zhang, Lianmeng;
7:1:156:3     Structural, ferroelectric and dielectric properties of In2O3:Sn (ITO) on PbZr0.53Ti0.47O3 (PZT)/Pt and annealing effect
DOI:10.1016/j.jallcom.2011.03.022  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Kerkache, L.;Layadi, A.;Dogheche, E.;Remiens, D.;
7:1:156:4     Preparation and characterisation of PZT films by RF-magnetron sputtering
DOI:10.1016/j.jallcom.2011.03.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Frunza, Raluca;Ricinschi, Dan;Gheorghiu, Felicia;Apetrei, Radu;Luca, Dumitru;Mitoseriu, Liliana;Okuyama, Masanori;
7:1:156:5     Low-temperature crystallization of CSD-derived PZT thin film with laser annealing
DOI:10.1016/j.mseb.2009.12.017  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:6  AU: Miyazaki, Takaharu;Imai, Takayuki;Wakiya, Naoki;Sakamoto, Naonori;Fu, Desheng;Suzuki, Hisao;
7:1:156:6     Polyethyleneimine surfactant effect on the formation of nano-sized BaTiO3 powder via a solid state reaction
DOI:10.1016/j.jallcom.2011.04.116  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:10  AU: Hsiang, Hsing-I.;Chang, Yu-Lun;Fang, Jang-Sen;Yen, Fu-Su;
7:1:156:7     Effect of sol composition on dielectric and ferroelectric properties of PZT composite films
DOI:10.1016/j.ceramint.2011.09.009  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Sachdeva, Anupama;Tandon, R. P.;
7:1:156:8     Preparation and electrical properties of ZnO/PZT films by radio frequency reactive magnetron sputtering
DOI:10.1016/j.matlet.2012.06.015  JN:MATERIALS LETTERS  PY:2012
  TC:3  AU: Meng, Xiangqin;Yang, Chengtao;Fu, Wujun;Wan, Jing;
7:1:157:1     Physical and electromechanical properties of barium zirconium titanate synthesized at low-sintering temperature
DOI:10.1016/j.matlet.2009.10.069  JN:MATERIALS LETTERS  PY:2010
  TC:26  AU: Binhayeeniyi, Nawal;Sukvisut, Pisan;Thanachayanont, Chanchana;Muensit, Supasarote;
7:1:157:2     Enhanced dielectric and piezoelectric properties of xBaZrO(3)-(1-x)BaTiO3 ceramics
DOI:10.1063/1.4705467  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:18  AU: Dong, Liang;Stone, Donald S.;Lakes, Roderic S.;
7:1:157:3     Improvement in piezoelectric strain of annealed Ba(Zr0.07Ti0.93)O-3 based ceramics
DOI:10.1063/1.4812227  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Jarupoom, Parkpoom;Rujijanagul, Gobwute;
7:1:157:4     Viscoelastic sigmoid anomalies in BaZrO3-BaTiO3 near phase transformations due to negative stiffness heterogeneity
DOI:10.1557/jmr.2011.145  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:7  AU: Dong, Liang;Stone, Donald S.;Lakes, Roderic S.;
7:1:157:5     Phase formation and electrical properties of Ba(ZrxTi1-x)O-3 ceramics synthesized through a novel combustion technique
DOI:10.1016/j.ceramint.2012.10.105  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Julphunthong, Phongthorn;Chootin, Suphornpun;Bongkarn, Theerachai;
7:1:157:6     Spherical Nanocrystalline Barium Zirconate Titanate Prepared by Co-Precipitation in Highly Basic Aqueous Solution
DOI:10.1080/00150193.2013.844054  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Seeharaj, Panpailin;Wirunchit, Supamas;Charoonsuk, Piyanut;Kim-Lohsoontorn, Pattaraporn;Vittayakorn, Naratip;
7:1:157:7     BaZr0.3Ti0.7O3 Nanoparticles Synthesized by Glycine-Nitrate Autocombustion
DOI:10.1080/00150193.2013.846199  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Seeharaj, Panpailin;Charoonsuk, Piyanut;Kim-Lohsoontorn, Pattaraporn;Vittayakorn, Naratip;
7:1:157:8     Structural and Electrical Properties of Ba(ZrxTi1-x)O-3 Films Prepared by RF-magnetron Sputtering Using Metal Targets
DOI:10.1080/10584587.2014.912110  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Kim, Jin Woong;Shima, Hiromi;Funakubo, Hiroshi;Nishida, Ken;Yamamoto, Takashi;
7:1:157:9     Microstructural investigation of sol-gel BZT powders
DOI:10.1016/j.matlet.2012.05.075  JN:MATERIALS LETTERS  PY:2012
  TC:4  AU: Thanachayanont, Chanchana;Yordsri, Visittapong;Kijamnajsuk, Suphakan;Binhayeeniyi, Nawal;Muensit, Nantakan;
7:1:158:1     De-aging of Fe-doped lead-zirconate-titanate ceramics by electric field cycling: 180 degrees- vs. non-180 degrees domain wall processes
DOI:10.1063/1.4739721  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Glaum, Julia;Genenko, Yuri A.;Kungl, Hans;Schmitt, Ljubomira Ana;Granzow, Torsten;
7:1:158:2     Site of incorporation and solubility for Fe ions in acceptor-doped PZT ceramics
DOI:10.1063/1.3327436  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Erdem, E.;Eichel, R. -A.;Fetzer, Cs;Dezsi, I.;Lauterbach, S.;Kleebe, H. -J.;Balogh, A. G.;
7:1:158:3     Evaluation of domain wall motion in bipolar fatigued lead-zirconate-titanate: A study on reversible and irreversible contributions
DOI:10.1063/1.3386461  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Glaum, Julia;Granzow, Torsten;Roedel, Juergen;
7:1:158:4     Determination of the True Operational Range of a Piezoelectric Actuator
DOI:10.1111/jace.13024  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Webber, Kyle G.;Franzbach, Daniel J.;Koruza, Jurij;
7:1:158:5     Microstructural, Electrical, and Magnetic Properties of Acceptor-Doped Nanostructured Lead Zirconate Titanate
DOI:10.1111/j.1551-2916.2011.04625.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Puthucheri, Smitha;Pandey, Prashant K.;Gajbhiye, Namdeo S.;Gupta, Arti;Singh, Anupinder;Chatterjee, Ratnamala;Date, Sadgopal K.;
7:1:158:6     Influence of Domain Switching and Domain Wall Bending on the Electrical Permittivity of PZT Thin Films
DOI:10.1080/00150193.2010.486254  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Lente, M. H.;Bacichetti, A. L.;Mendes, R. G.;Eiras, J. A.;
7:1:158:7     Dielectric and ferroelectric properties of Pb0.88La0.12(Ti1-xMnx)(0.97)O-3 nanoceramics
DOI:10.1016/j.materresbull.2013.06.029  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:2  AU: Shukla, Archana;Choudhary, R. N. P.;
7:1:159:1     Synthesis and structural ordering of nano-sized Ba3B ' Nb2O9 (B ' = Ca and Zn) powders
DOI:10.1016/j.ceramint.2013.11.037  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Figueiredo Soares Rodrigues, Joao Elias;Bezerra, Debora Morais;Maciel, Adeilton Pereira;Paschoal, C. W. A.;
7:1:159:2     Low-temperature preparation of self-polarized Pb(Mg1/3Nb2/3)O-3-PbTiO3 films on well crystallized LaNiO3 electrodes
DOI:10.1016/j.jallcom.2013.06.174  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Zhao, Yuanyuan;Li, Xiaolong;Hu, Guangda;Xu, Jianbin;
7:1:159:3     Thickness effects of Bi0.89Ti0.11FeO3 thin films deposited on PbZr0.2Ti0.79Nb0.01O3 buffer layers
DOI:10.1016/j.jallcom.2010.09.049  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Chen, X. M.;Hu, G. D.;Wang, J. C.;Cheng, L.;Yang, C. H.;Wu, W. B.;
7:1:159:4     Synthesis and electrical characterization of Ba(Cd1/3Nb2/3)O-3 ferroelectric compound
DOI:10.1016/j.matchemphys.2013.02.010  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:1  AU: Pastor, Mukul;Biswas, Koushik;
7:1:159:5     Dielectric tunability properties of the Pb[( Mg1/3Nb2/3)(1-x)Zr-x]O-3 ceramics
DOI:10.1016/j.jallcom.2012.09.001  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Peng, Biaolin;Fan, Huiqing;Li, Qiang;Zhang, Qi;
7:1:159:6     The influence of defects on ferroelectric and pyroelectric properties of Pb(Mg1/3Nb2/3)O-3-0.28PbTiO(3) single crystals
DOI:10.1016/j.matchemphys.2011.10.055  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:4  AU: Wu, Xiao;Liu, Linhua;Li, Xiaobing;Zhao, Xiangyong;Lin, Di;Luo, Haosu;Huang, Yanlin;
7:1:159:7     Phase evolution, dielectric and impedance spectroscopic study of SrNb2O6 columbite phase
DOI:10.1016/j.ceramint.2009.12.013  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:2  AU: Pastor, M.;Goenka, S.;Maiti, S.;Biswas, K.;Manna, I.;
7:1:159:8     Microwave dielectric properties of multi-ions Ba(Zn,Ta)O-3-based perovskite ceramics
DOI:10.1016/j.ceramint.2011.08.040  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Wang, Sea-Fue;Wang, Yuh-Ruey;Liu, Chung-Yu;Hsieh, Wen-Shuo;
7:1:159:9     Synthesis for fine perovskite-type materials using precursor prepared by metal nitrates solution mixed with organic solvent
DOI:10.1016/j.matchemphys.2011.08.021  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:5  AU: Aono, Hiromichi;Izumi, Jun;Tomida, Musashi;Sadaoka, Yoshihiko;
7:1:160:1     Effect of Sintering Temperature on Microstructure and Electric Properties of 0.95(K0.5Na0.5)NbO3-0.05Li(Nb0.5Sb0.5)O(3)with Copper Oxide Sintering Aid
DOI:10.1111/j.1551-2916.2010.04353.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:20  AU: Zhao, Yongjie;Zhao, Yuzhen;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;
7:1:160:2     Effects of sintering temperature and poling process on Li-0.058(Na0.51K0.49)(0.942)NbO3 piezoceramics
DOI:10.1016/j.materresbull.2013.09.038  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Zhao, Yongjie;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;Zhao, Wei;
7:1:160:3     The effect of sintering and poling processing on the phase structure of Li-0.058(Na0.51K0.49)(0.942)NbO3 lead-free ceramics
DOI:10.1016/j.scriptamat.2011.10.010  JN:SCRIPTA MATERIALIA  PY:2012
  TC:3  AU: Zhao, Yongjie;Zhao, Yuzhen;Zhang, Xiaowen;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;
7:1:160:4     The correlation between the microstructure and macroscopic properties of (K,Na,Li)(Nb,Ta)O-3 ceramic via rare earth oxide doping
DOI:10.1016/j.ceramint.2013.07.072  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Zhao, Yongjie;Wang, Lihua;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;
7:1:160:5     Grain size control of lead-free Li-0.06(Na0.5K0.5)(0.94)NbO3 piezoelectric ceramics by Ba and Ti doping
DOI:10.1016/j.jeurceramsoc.2009.07.030  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Kakimoto, Ken-ichi;Ando, Kiyotaka;Ohsato, Hitoshi;
7:1:160:6     Enhanced piezoelectric properties of Fe2O3-2TiO(2) codoped Li-0.05(Na0.5K0.5)(0.95)(Nb0.975Sb0.025)O-3 lead-free ceramics with uniform microstructure
DOI:10.1016/j.matchemphys.2011.09.070  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:1  AU: Zhao, Yongjie;Zhao, Yuzhen;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;
7:1:160:7     Poling field dependence of ferroelectric domains in tetragonal KKNLN ceramics
DOI:10.1016/j.ceramint.2012.04.053  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Zhao, Yongjie;Zhao, Yuzhen;Huang, Rongxia;Liu, Rongzheng;Zhou, Heping;
7:1:160:8     Microstructure and Electrical Properties of Low-temperature Sintered K0.48Na0.52NbO3 Piezoelectric Ceramics
DOI:10.1080/00150193.2013.842448  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Ma, Jian;Xiao, Ding-Quan;Wu, Wen-Juan;Wu, Jia-Gang;Zhu, Jian-Guo;
7:1:160:9     Dielectric and Piezoelectric Properties of (K0.5Na0.5)(Nb0.96Sb0.04)O-3 Ceramics Doped with La2O3
DOI:10.1080/00150193.2011.639230  JN:FERROELECTRICS  PY:2011
  TC:6  AU: Yoo, Juhyun;Seo, Byeongho;
7:1:161:1     General equivalent circuit derived from capacitance and impedance measurements performed on epitaxial ferroelectric thin films
DOI:10.1063/1.4891255  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Pintilie, L.;Hrib, L.;Pasuk, I.;Ghica, C.;Iuga, A.;Pintilie, I.;
7:1:161:2     Structural, electric and magnetic properties of Pb(Zr0.2Ti0.8)O-3-CoFe2O4 heterostructures
DOI:10.1016/j.tsf.2013.06.033  JN:THIN SOLID FILMS  PY:2013
  TC:3  AU: Chirila, C.;Ibanescu, G.;Hrib, L.;Negrea, R.;Pasuk, I.;Kuncser, V.;Pintilie, I.;Pintilie, L.;
7:1:161:3     Dielectric tunability transition in Ba0.6Sr0.4TiO3-based capacitors
DOI:10.1063/1.3641980  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Qiu, Jie;Liu, Guozhen;Sakai, Joe;Gervais, Francois;Wolfman, Jerome;
7:1:161:4     Impedance characterization of AlGaN/GaN Schottky diodes with metal contacts
DOI:10.1063/1.4801643  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Donahue, M.;Luebbers, B.;Kittler, M.;Mai, P.;Schober, A.;
7:1:161:5     Barrier layer and grain boundary effects in Nd/Zr doped BaTiO3 ceramics
DOI:10.1016/j.mseb.2010.12.009  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:3  AU: Tennakone, H.;Park, E.;Tennakone, K.;Buchanan, R. C.;
7:1:161:6     Pentacene Schottky diodes studied by impedance spectroscopy: Doping properties and trap response
DOI:10.1103/PhysRevB.88.195205  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:1:161:7     Electrical Impedance Characterization of Bi Doped BaTiO3 Prepared through Chemical Route
DOI:10.1080/10584587.2010.489414  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:1  AU: Sreenu, K.;Kumar, G. S.;Prasad, N. V.;Vithal, M.;Prasad, G.;
7:1:161:8     Doping concentration and thickness effects in ferroelectric thin films
DOI:10.1063/1.3364136  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Zhang, J.;Tang, M. H.;He, J.;
7:1:161:9     Comparison of structural and electric properties of PbZr0.2Ti0.8O3 and CoFe2O4/PbZr0.2Ti0.8O3 films on (100) LaAlO3
DOI:10.1063/1.3642977  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Zhang, X. D.;Dho, Joonghoe;Park, Sungmin;Kwon, Hyosang;Hwang, Jihwan;Park, Gwangseo;Kwon, Daeyoung;Kim, Bongju;Jin, Yeryeong;Kim, Bog G.;Karpinsky, D.;Kholkin, A. L.;
7:1:162:1     In situ neutron diffraction studies of a commercial, soft lead zirconate titanate ceramic: response to electric fields and mechanical stress
DOI:10.1007/s00339-010-5605-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:16  AU: Pramanick, Abhijit;Prewitt, Anderson D.;Cottrell, Michelle A.;Lee, Wayne;Studer, Andrew J.;An, Ke;Hubbard, Camden R.;Jones, Jacob L.;
7:1:162:2     Effect of Uniaxial Compressive Stress on Dielectric and Piezoelectric Responses in Lead Zirconate Titanate Based Ceramics
DOI:10.1111/j.1551-2916.2011.05048.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Ochoa, Diego A.;Garcia, Jose E.;Tamayo, Idalberto;Gomis, Vicenc;Damjanovic, Dragan;Perez, Rafel;
7:1:162:3     Evidence of temperature dependent domain wall dynamics in hard lead zirconate titanate piezoceramics
DOI:10.1063/1.4736582  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Garcia, J. E.;Ochoa, D. A.;Gomis, V.;Eiras, J. A.;Perez, R.;
7:1:162:4     Preisach modelling of nonlinear response in electrically biased lead zirconate titanate-based piezoceramics
DOI:10.1007/s00339-012-7492-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:1  AU: Ochoa, Diego A.;Perez, Rafel;Garcia, Jose E.;
7:1:162:5     Quantitative comparison between the degree of domain orientation and nonlinear properties of a PZT ceramic during electrical and mechanical loading
DOI:10.1557/jmr.2011.40  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:7  AU: Marsilius, Mie;Granzow, Torsten;Jones, Jacob L.;
7:1:162:6     Poling induced dielectric anomalies in a PZT ceramic
DOI:10.1016/j.ceramint.2013.04.090  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Chen, Libing;Liang, Ruihong;Wang, Genshui;Nie, Hengchang;Zhou, Zhiyong;Cao, Fei;Dong, Xianlin;
7:1:163:1     Study of microstructure and electrical properties of BaNbxFexTi1-2xO3 (0 < x <= 0.1) negative temperature coefficient materials
DOI:10.1016/j.matlet.2012.11.052  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Luo, Ying;Li, Xvqiong;Liu, Xinyu;Yuan, Changlai;
7:1:163:2     Role of oxygen vacancies on relaxation and conduction behavior of KNbO(3) ceramic
DOI:10.1063/1.3309745  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:16  AU: Singh, Gurvinderjit;Tiwari, V. S.;Gupta, P. K.;
7:1:163:3     Phase transition and PTCR effect in erbium doped BT ceramics
DOI:10.1016/j.mseb.2012.03.048  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:1  AU: Leyet, Y.;Pena, R.;Zulueta, Y.;Guerrero, F.;Anglada-Rivera, J.;Romaguera, Y.;Perez de la Cruz, J.;
7:1:163:4     Influence of A-site deficiency on oxygen-vacancy-related dielectric relaxation, electrical and temperature stability properties of CuO-doped NKN-based piezoelectric ceramics
DOI:10.1016/j.ceramint.2012.10.055  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Tsai, Cheng-Che;Chu, Sheng-Yuan;Hong, Cheng-Shong;Yang, Song-Ling;
7:1:163:5     Anomaly in the conductivity relaxation parameters at the phase transition of ferroelectric materials: A time domain study
DOI:10.1063/1.3505932  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:1  AU: Leyet, Y.;Guerrero, F.;Amorin, H.;Guerra, J. de Los S.;Eiras, J. A.;
7:1:163:6     Bulk response and grain boundary microelectrical activity of high T-C BaTiO3-(Bi1/2K1/2)TiO3-based positive temperature coefficient of resistance ceramics
DOI:10.1557/jmr.2013.282  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:1  AU: Zubair, Mohammad A.;Takeda, Hiroaki;Leach, Colin;Freer, Robert;Hoshina, Takuya;Tsurumi, Takaaki;
7:1:163:7     Effect of commercial anatase-TiO2 raw materials on the electrical characteristics of ceramics with positive temperature coefficient of resistivity
DOI:10.1016/j.jeurceramsoc.2011.05.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Kirstein, K.;Reichmann, K.;Preis, W.;Mitsche, S.;
7:1:163:8     Crystal phases and electric properties of (Na0.5K0.5)(1-x)Nb1+x/5O3:yCuO, zLiSbO(3) piezoceramics
DOI:10.1016/j.ceramint.2011.04.116  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Moon, S. H.;Han, S. H.;Kang, H. W.;Lee, H-G.;Chae, K. W.;Kim, J. S.;Cheon, C. I.;
7:1:163:9     Microstructural and electrical property evolution in an acceptor-dopant free positive temperature coefficient thermistor
DOI:10.1016/j.mssp.2011.08.003  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2012
  TC:2  AU: Leach, C.;Zubair, M. A.;
7:1:163:10     A Rapid-Doping Method for High-Throughput Discovery Applied to Thick-Film PTCR Materials
DOI:10.1111/j.1551-2916.2011.04667.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Chen, Yulong;Evans, Julian R. G.;Yang, Shoufeng;
7:1:163:11     Oxidation state of chromium in (Na0.5Bi0.5TiO3)((1-x))(BiCrO3)(x) solid solution; investigated by XAS and impedance spectroscopy
DOI:10.1007/s10853-011-5999-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:0  AU: Selvamani, Rachna;Singh, Gurvinderjit;Sinha, A. K.;Tiwari, V. S.;
7:1:163:12     The effect of SiO2 addition on the development of low-Sigma grain boundaries in PTC thermistors
DOI:10.1016/j.jeurceramsoc.2009.07.026  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Zubair, M. A.;Leach, C.;
7:1:164:1     Electromechanical and electrical properties of Bi0.5Na0.5Ti1-xMnxO3-delta ceramics with high remnant polarization
DOI:10.1016/j.jallcom.2014.04.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Guo, Yuchen;Fan, Huiqing;Long, Changbai;Shi, Jing;Yang, Lu;Lei, Shenhui;
7:1:164:2     Effect of Li0.12Na0.88NbO3 content on the electrical properties of Bi0.50Na0.50TiO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jallcom.2012.01.014  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Chen, Tao;Zhang, Ting;Wang, Guangchang;Zhou, Jifang;Zhang, Jianwei;Liu, Yuhong;
7:1:164:3     Effects of NaTaO3 additions on structure and electrical properties of K0.5Na0.5NbO3-Bi0.5Na0.5TiO3-LiSbO3 piezoelectric ceramics
DOI:10.1016/j.ceramint.2011.02.008  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:4  AU: Liu, Yixiong;Huang, Yanqiu;Li, Huilin;Du, Haiwei;Tang, Hongping;Zhang, Guoxi;
7:1:164:4     The Crystalline Structure and Phase-Transitional Behavior of (Li0.12Na0.88)(Nb1-x%Sbx%)O-3 Lead-Free Piezoelectric Ceramics with High Q(m)
DOI:10.1111/j.1551-2916.2010.03813.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Chen, Qiang;Peng, Zhihang;Liu, Hong;Xiao, Dingquan;Zhu, Jiliang;Zhu, Jianguo;
7:1:165:1     Improved high Q value of (1-x)Ca(Mg1/3Ta2/3)O-3-xCa(0.8)Sm(0.4/3)TiO(3) solid solution with zero temperature coefficient of resonant frequency
DOI:10.1016/j.jallcom.2009.11.061  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:14  AU: Chen, Jhih-Yong;Tseng, Yu-Wei;Huang, Cheng-Liang;
7:1:165:2     Rapid synthesis of quasi-spherical (Ba,Sr)TiO3 nanocrystals via a microwave-activated glycothermal approach
DOI:10.1039/c0jm02689a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:6  AU: Yang Xiaowei;Zeng Yanwei;Mo Leiqing;Han Longxiang;
7:1:165:3     BiFeO3 Thin Films Deposited on LaNiO3-Buffered SiO2/Si Substrate
DOI:10.1111/j.1551-2916.2009.03579.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Wu, Jiagang;Wang, John;
7:1:165:4     Oleic acid assisted glycothermal synthesis of cuboidal Ba0.6Sr0.4TiO3 nanocrystals and their ordered architectures via self-assembly
DOI:10.1016/j.jcis.2011.02.015  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2011
  TC:4  AU: Yang Xiaowei;Zeng Yanwei;Mo Leiqing;Han Longxiang;
7:1:165:5     Preparation of Spherical Bi3.25La0.75Ti3O12 Nanocrystals by a Sol-Gel Inverse Mini-Emulsion Approach
DOI:10.1007/s13391-013-3064-8  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:2  AU: Han Longxiang;Zheng Lingjing;Hu Zhenxing;Yin Shilong;Zeng Yanwei;
7:1:165:6     Glycothermal synthesis of heavily Ce-doped YIG nanocrystals and their microstructures and magnetic properties
DOI:10.1039/c2tc00335j  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:2  AU: Ji Rongjin;Yin Wenhui;Fang Caixiang;Zeng Yanwei;
7:1:165:7     The crystalline orientation and ferroelectric properties of Bi3.25La0.75Ti3O12 thin films mediated by the intermediate layer of LaNiO3
DOI:10.1016/j.apsusc.2010.12.014  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:3  AU: Wang, J. B.;Li, P. J.;Zhong, X. L.;
7:1:166:1     Sintering, microstructure and piezoelectric properties of CuO and SnO2 co-modified sodium potassium niobate ceramics
DOI:10.1016/j.materresbull.2009.09.033  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:18  AU: Su, Shi;Zuo, Ruzhong;Wang, Xiaohui;Li, Longtu;
7:1:166:2     Sintering behavior and electrical properties of the (Li, Ta, Sb) modified (K, Na)NbO3 lead-free ceramics with KNbO3 as sintering aid
DOI:10.1016/j.matlet.2011.09.069  JN:MATERIALS LETTERS  PY:2012
  TC:10  AU: Wang, Hong-Qiang;Zhang, Xiao-Wen;Dai, Ye-Jing;
7:1:166:3     Microstructures and electrical properties of KNbO3 doped (Li,Ta,Sb) modified (K,Na)NbO3 lead-free ceramics by two-step sintering
DOI:10.1016/j.matlet.2012.08.061  JN:MATERIALS LETTERS  PY:2012
  TC:6  AU: Li, Yang;Dai, Ye-Jing;Wang, Hong-Qiang;Sun, Tao;Xu, Wei;Zhang, Xiao-Wen;
7:1:166:4     Investigation of nano particle additives on lithium doped KNN lead free piezoelectric ceramics
DOI:10.1016/j.ceramint.2011.05.044  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:8  AU: Saeri, M. R.;Barzegar, A.;Moghadam, H. Ahmadi;
7:1:166:5     Phase transition behavior and electrical properties of (1-x)Bi0.5Na0.5TiO3-x(Na0.53K0.44Li0.04)(Nb0.88Sb0.08Ta0.04)O-3 lead-free ceramics
DOI:10.1016/j.jeurceramsoc.2012.01.008  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Wang, Hong-Qiang;Dai, Ye-Jing;Shen, Zhu-Rui;Zhang, Xiao-Wen;
7:1:166:6     Dielectric and Piezoelectric Properties of Modified (Na,K)NbO3, Ceramics Substituted with KNbO3
DOI:10.1080/00150193.2013.822776  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Byeon, Sun-Min;Yoo, Ju-Hyun;
7:1:166:7     Microstructure and Piezoelectric Properties of (K(0.5)Na(0.5))NbO(3)-BaTiO(3) Lead-Free Piezoelectric Ceramics Modified by B(2)O(3)-CuO
DOI:10.1111/j.1551-2916.2010.03932.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Yan, Kang;Matsumoto, Kohei;Karaki, Tomoaki;Adachi, Masatoshi;
7:1:167:1     Tuning of dielectric properties and magnetism of SrTiO3 by site-specific doping of Mn
DOI:10.1103/PhysRevB.84.125124  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Choudhury, D.;Mukherjee, S.;Mandal, P.;Sundaresan, A.;Waghmare, U. V.;Bhattacharjee, S.;Mathieu, R.;Lazor, P.;Eriksson, O.;Sanyal, B.;Nordblad, P.;Sharma, A.;Bhat, S. V.;Karis, O.;Sarma, D. D.;
7:1:167:2     Polar clusters in impurity-doped quantum paraelectric K1-xLixTaO(3)
DOI:10.1103/PhysRevB.81.144112  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Geneste, Gregory;Kiat, Jean-Michel;Yokota, Hiroko;Uesu, Yoshiaki;Porcher, Florence;
7:1:167:3     First-principles free energies and Ginzburg-Landau theory of domains and ferroelectric phase transitions in BaTiO3
DOI:10.1103/PhysRevB.82.054117  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Kumar, Anil;Waghmare, Umesh V.;
7:1:167:4     Dielectric relaxation in Li-doped KTaO3 studied by kinetic Monte Carlo
DOI:10.1103/PhysRevB.83.184202  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Geneste, Gregory;Kiat, Jean-Michel;Yokota, Hiroko;Uesu, Yoshiaki;
7:1:167:5     Ferrimagnetic transition in the compound Sr0.9La0.1Ti0.9Co0.1O3
DOI:10.1063/1.4790153  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Yang, J.;Shao, D. F.;Zhu, X. B.;Yang, Z. R.;Sun, Y. P.;Lee, Y. P.;
7:1:167:6     Surface structure of lithium-doped potassium tantalate using helium atom scattering
DOI:10.1103/PhysRevB.87.085419  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Fatema, Rifat;Van Winkle, David H.;Skofronick, J. G.;Safron, Sanford A.;Flaherty, F. A.;Boatner, L. A.;
7:1:167:7     Study on alpha-beta quartz phase transition and its effect on dielectric properties
DOI:10.1063/1.4722217  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Xie, Xiaojun;Cheng, Yonghong;Wu, Kai;Xiao, Bing;
7:1:167:8     Helium atom scattering from KTa0.7Nb0.3O3 (001): Anomalous surface reflectivity with varying surface temperature and helium wave vector
DOI:10.1103/PhysRevB.84.144114  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Fatema, Rifat;Trelenberg, T. W.;Van Winkle, David H.;Skofronick, J. G.;Safron, S. A.;Flaherty, F. A.;Boatner, L. A.;
7:1:168:1     An optimization-based "phase field" model for polycrystalline ferroelectrics
DOI:10.1063/1.3377899  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Li, F. X.;Zhou, X. L.;Soh, A. K.;
7:1:168:2     Simulations of domain evolution in morphotropic ferroelectric ceramics under electromechanical loading using an optimization-based model
DOI:10.1063/1.3569583  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Zhou, X. L.;Li, F. X.;
7:1:168:3     Domain switching characteristics of lead zirconate titanate piezoelectric ceramics during mechanical compressive loading
DOI:10.1016/j.jeurceramsoc.2010.09.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Okayasu, Mitsuhiro;Sato, Kazuto;Kusaba, Yoko;
7:1:168:4     Mechanism of crystal-symmetry dependent deformation in ferroelectric ceramics: Experiments versus model
DOI:10.1063/1.4809979  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Li, Y. W.;Zhou, X. L.;Miao, H. C.;Cai, H. R.;Li, F. X.;
7:1:168:5     An optimization-based computational model for domain evolution in polycrystalline ferroelastics
DOI:10.1016/j.actamat.2009.12.006  JN:ACTA MATERIALIA  PY:2010
  TC:6  AU: Li, F. X.;Soh, A. K.;
7:1:168:6     Simulations of nonlinear deformations in Ni-Ti shape memory alloys under tension/compression using an energy minimization model
DOI:10.1016/j.commatsci.2013.09.007  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: Zhou, Xilong;Li, Faxin;
7:1:168:7     Large anisotropy of fracture toughness in mechanicafly poled/depoled ferroelectric ceramics
DOI:10.1016/j.scriptamat.2009.11.032  JN:SCRIPTA MATERIALIA  PY:2010
  TC:4  AU: Li, Y. W.;Li, F. X.;
7:1:168:8     Domain texture dependent fracture behavior in mechanically poled/depoled ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.04.034  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Li, Yingwei;Sun, Yao;Li, Faxin;
7:1:168:9     Effect of electrical fatigue on the electromechanical behavior and microstructure of strontium modified lead zirconate titanate ceramics
DOI:10.1016/j.mseb.2009.09.030  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:3  AU: Dutta, I.;Singh, R. N.;
7:1:169:1     Alumina based ceramics for high-voltage insulation
DOI:10.1016/j.jeurceramsoc.2009.09.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:20  AU: Touzin, M.;Goeuriot, D.;Guerret-Piecourt, C.;Juve, D.;Fitting, H-J;
7:1:169:2     Study of discharge after electron irradiation in sapphires and polycrystalline alumina
DOI:10.1063/1.3504856  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Zarbout, K.;Moya, G.;Ahmed, A. Si;Damamme, G.;Kallel, A.;
7:1:169:3     Secondary electron emission and self-consistent charge transport in semi-insulating samples
DOI:10.1063/1.3608151  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Fitting, H. -J.;Touzin, M.;
7:1:169:4     Dependence of secondary electron emission on surface charging in sapphire and polycrystalline alumina: Evaluation of the effective cross sections for recombination and trapping
DOI:10.1016/j.apsusc.2014.01.070  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Said, K.;Damamme, G.;Ahmed, A. Si;Moya, G.;Kallel, A.;
7:1:169:5     Time-dependent start-up and decay of secondary electron emission in dielectrics
DOI:10.1063/1.3460284  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Fitting, H. -J.;Touzin, M.;
7:1:169:6     Atmospheric pressure air plasma treated alumina powder for ceramic sintering
DOI:10.1016/j.ceramint.2014.04.124  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Szalay, Zsolt;Bodisova, Katarina;Palkova, Helena;Svancarek, Peter;Durina, Pavol;Rahel, Jozef;Zahoranova, Anna;Galusek, Dugan;
7:1:169:7     Contribution to the understanding of the relationship between mechanical and dielectric strengths of Alumina
DOI:10.1016/j.jeurceramsoc.2010.07.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Malec, David;Bley, Vincent;Talbi, Fatiha;Lalam, Fadila;
7:1:169:8     Dielectric breakdown of alumina single crystals
DOI:10.1016/j.jeurceramsoc.2011.11.013  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Neusel, C.;Jelitto, H.;Schmidt, D.;Janssen, R.;Felten, F.;Schneider, G. A.;
7:1:169:9     Total electron emission yield measurement of insulator by a scanning small detector
DOI:10.1063/1.3647637  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Chen, Yu;Kouno, Takanori;Toyoda, Kazuhiro;Cho, Mengu;
7:1:169:10     Dielectric tunable properties of high dielectric breakdown Ba0.5Sr0.5TiO3-Zn2P2O7 composite ceramics
DOI:10.1016/j.ceramint.2011.04.048  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Zhang, Qiwei;Zhai, Jiwei;Shen, Bo;Yao, Xi;
7:1:169:11     Variation of DC Breakdown Strength with Phase Transition Temperature in (Ba1-xSrx)TiO3 Ceramics
DOI:10.1080/00150193.2013.778185  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Zheng, Z.;Zhang, Y.;Wang, X.;Zhang, Q.;Baturin, I.;
7:1:169:12     Dielectric Breakdown of Polycrystalline Alumina: A Weakest-Link Failure Analysis
DOI:10.1111/jace.12492  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Block, Benjamin;Kim, Youngjin;Shetty, Dinesh K.;
7:1:170:1     Phase transitions and optical characterization of lead-free piezoelectric (K0.5Na0.5)(0.96)Li-0.04(Nb0.8Ta0.2)O-3 thin films
DOI:10.1016/j.tsf.2013.04.043  JN:THIN SOLID FILMS  PY:2013
  TC:5  AU: Yao, Y. B.;Chan, H. T.;Mak, C. L.;Wong, K. H.;
7:1:170:2     Local dynamics and structure of pure and Ta substituted (K1-xNax)NbO3 from first principles calculations
DOI:10.1103/PhysRevB.82.014114  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Suewattana, Malliga;Singh, David J.;
7:1:170:3     Lead-free piezoelectric (K0.5Na0.5)NbO3 thin films derived from chemical solution modified with stabilizing agents
DOI:10.1063/1.3488808  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Goh, Phoi Chin;Yao, Kui;Chen, Zhong;
7:1:170:4     Effect of Ta content on the phase transition and piezoelectric properties of lead-free (K0.48Na0.48Li0.04)(Nb0.995-xMn0.005Tax)O-3 thin film
DOI:10.1063/1.3680882  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Ahn, Chang Won;Seog, Hae Jin;Ullah, Aman;Lee, Sun Young;Kim, Jin Won;Kim, Sang Su;Park, Moonkyu;No, Kwangsoo;Kim, Ill Won;
7:1:170:5     Effects of stress on the optical properties of epitaxial Nd-doped Sr0.5Ba0.5Nb2O6 films
DOI:10.1063/1.3647516  JN:AIP ADVANCES  PY:2011
  TC:4  AU: Yao, Y. B.;Liu, W. C.;Mak, C. L.;Wong, K. H.;
7:1:171:1     Electrical conduction and bipolar switching properties in transparent vanadium oxide resistive random access memory (RRAM) devices
DOI:10.1007/s00339-012-7116-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:4  AU: Chen, Kai-Huang;Liao, Chin-Hsiung;Tsai, Jen-Hwan;Wu, Sean;
7:1:171:2     Low temperature improvement method on characteristics of Ba(Zr0.1Ti0.9)O-3 thin films deposited on indium tin oxide/glass substrates
DOI:10.1007/s00339-009-5523-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:9  AU: Chen, Kai-Huang;Chang, Ting-Chang;Chang, Guan-Chang;Hsu, Yung-En;Chen, Ying-Chung;Xu, Hong-Quan;
7:1:171:3     Electrical and Ferroelectric Properties of the Bi3.9La0.1Ti2.9V0.1O12 (BLTV) Thin Films
DOI:10.1080/10584587.2014.957136  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Chen, Kai-Huang;Cheng, Chien-Min;Wu, Sean;Lin, Jian-Yang;
7:1:171:4     Bipolar resistive switching properties in transparent vanadium oxide resistive random access memory
DOI:10.1016/j.ceramint.2012.10.170  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Yang, Fann-Wei;Chen, Kai-Huang;Cheng, Chien-Min;Su, Feng-Yi;
7:1:171:5     The influence of lanthanum doping on the physical and electrical properties of BTV ferroelectric thin films
DOI:10.1007/s00339-010-6070-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:5  AU: Chen, Kai-Huang;Cheng, Chien-Min;Shih, Chia-Chi;Tsai, Jen-Hwan;
7:1:171:6     Solution-based fabrication and electrical properties of CaBi4Ti4O15 thin films
DOI:10.1016/j.ceramint.2011.04.056  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Cheng, Chien-Min;Chen, Kai-Huang;Tsai, Jen-Hwan;Wu, Chia-Lin;
7:1:171:7     Electrical and Physical Characteristics of Vanadium-Doped Bi4Ti3O12 Ferroelectric Thin Films after Rapid Thermal Annealing
DOI:10.1080/00150193.2012.740302  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Yang, Fann-Wei;Chen, Kai-Huang;Cheng, Chien-Min;
7:1:172:1     Broadband dielectric response and grain-size effect in K0.5Na0.5NbO3 ceramics
DOI:10.1063/1.3273490  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:23  AU: Buixaderas, E.;Bovtun, V.;Kempa, M.;Savinov, M.;Nuzhnyy, D.;Kadlec, F.;Vanek, P.;Petzelt, J.;Eriksson, M.;Shen, Z.;
7:1:172:2     Dielectric and AC-conductivity studies of Dy2O3 doped (K0.5Na0.5)NbO3 ceramics
DOI:10.1063/1.4892856  JN:AIP ADVANCES  PY:2014
  TC:4  AU: Peddigari, Mahesh;Thota, Subhash;Pamu, Dobbidi;
7:1:172:3     Relaxor and strain behavior in BaTi1-x(Li2/3Nb2/3)(x)O-3 ceramics
DOI:10.1016/j.ceramint.2012.04.054  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Xiao, Shi;Deng, Sen;Zhang, Jingji;Zhou, Yilu;Tang, Jiamin;Wang, Yidan;Wang, Lipeng;Qi, Hongfang;Wang, Jiangying;
7:1:172:4     Broadband Dielectric Investigation of Sodium Potassium Niobate Ceramic Doped 8% of Antimony
DOI:10.1080/00150193.2012.675261  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Bagdzevicius, Sarunas;Banys, Juras;Grigalaitis, Robertas;Sternberg, Andris;Bormanis, Karlis;
7:1:173:1     Energy harvesting using a modified rectangular cymbal transducer based on 0.71Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) single crystal
DOI:10.1063/1.3296156  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Ren, Bo;Or, Siu Wing;Zhao, Xiangyong;Luo, Haosu;
7:1:173:2     Cryogenic motion performances of a piezoelectric single crystal micromotor
DOI:10.1063/1.4870947  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Li, Xiaotian;Wu, Yuting;Chen, Zhijiang;Wei, Xiaoyong;Luo, Haosu;Dong, Shuxiang;
7:1:173:3     A single crystal lead magnesium niobate-lead titanate multilayer-stacked cryogenic flextensional actuator
DOI:10.1063/1.4790142  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Xu, Tian-Bing;Tolliver, Laura;Jiang, Xiaoning;Su, Ji;
7:1:173:4     Cryogenic transverse and shear mode properties of (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) single crystal with the optimal crystallographic direction
DOI:10.1016/j.matchemphys.2010.09.067  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:4  AU: Wang, Feifei;Shi, Wangzhou;Or, Siu Wing;Zhao, Xiangyong;Luo, Haosu;
7:1:173:5     Cantilever driving low frequency piezoelectric energy harvester using single crystal material 0.71Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3)
DOI:10.1063/1.4737170  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Xu, Chundong;Ren, Bo;Di, Wenning;Liang, Zhu;Jiao, Jie;Li, Lingying;Li, Long;Zhao, Xiangyong;Luo, Haosu;Wang, Dong;
7:1:173:6     A two degrees-of-freedom piezoelectric single-crystal micromotor
DOI:10.1063/1.4903834  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chen, Zhijiang;Li, Xiaotian;Liu, Guoxi;Dong, Shuxiang;
7:1:173:7     Nonlinear output properties of cantilever driving low frequency piezoelectric energy harvester
DOI:10.1063/1.4768219  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Xu, Chundong;Ren, Bo;Liang, Zhu;Chen, Jianwei;Zhang, Haiwu;Yue, Qingwen;Xu, Qing;Zhao, Xiangyong;Luo, Haosu;
7:1:173:8     A piezoelectric multilayer-stacked hybrid actuation/transduction system
DOI:10.1063/1.3600057  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Xu, Tian-Bing;Jiang, Xiaoning;Su, Ji;
7:1:174:1     Processing and properties of ferroelectric Bi-0.5(Na0.65K0.35)(0.5)TiO3 ceramics under the effect of different sintering temperature
DOI:10.1016/j.scriptamat.2014.06.029  JN:SCRIPTA MATERIALIA  PY:2014
  TC:3  AU: Bhandari, Sonia;Sinha, Nidhi;Ray, Geeta;Kumar, Binay;
7:1:174:2     Enhancement in dielectric and ferroelectric properties of lead free Bi-0.5(Na0.5K0.5)(0.5)TiO3 ceramics by Sb-doping
DOI:10.1016/j.ceramint.2011.04.013  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:13  AU: Kumar, Krishan;Singh, B. K.;Gupta, M. K.;Sinha, N.;Kumar, Binay;
7:1:174:3     Environment friendly novel piezoelectric 0.94[Na0.8K0.2NbO3]-0.06LiNbO(3) ternary ceramic for high temperature dielectric and ferroelectric applications
DOI:10.1016/j.matchemphys.2013.08.006  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:8  AU: Ray, Geeta;Sinha, Nidhi;Kumar, Binay;
7:1:174:4     Structural, dielectric and ferroelectric properties of SBN ceramics synthesized by microwave reactive sintering technique
DOI:10.1016/j.ceramint.2012.03.034  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Kumar, S. N.;Kumar, P.;Agrawal, D. K.;
7:1:174:5     Properties of RF magnetron sputtered 0.95 (Na0.5Bi0.5) TiO3-0.05 BaTiO3 thin films
DOI:10.1016/j.ceramint.2011.05.145  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:4  AU: Lin, Ying-Hsun;Cheng, Ping-Shou;Wu, Chia-Ching;Sun, Tai-Ping;Lin, Jing-Jenn;Yang, Cheng-Fu;
7:1:174:6     Ordered domains in lead free 0.94(Na0.5Bi0.5)TiO3-0.06BaTiO(3) ceramics
DOI:10.1016/j.ceramint.2011.11.035  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Liu Yunfei;Lu Yinong;Pan Zhigang;
7:1:174:7     Solid Solutions of Lead Metaniobate-Stabilization of the Ferroelectric Polymorph and the Effect on the Lattice Parameters, Dielectric, Ferroelectric, and Piezoelectric Properties
DOI:10.1111/jace.12628  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Sahini, Mtabazi G.;Grande, Tor;Fraygola, Barbara;Biancoli, Alberto;Damjanovic, Dragan;Setter, Nava;
7:1:174:8     Structural Characterization of Orthorhombic and Rhombohedral Lead Meta-Niobate Samples
DOI:10.1080/10584587.2010.503804  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:4  AU: Chakraborty, Keka R.;Sahu, Kriti Ranjan;De, Abhijit;De, Udayan;
7:1:175:1     Ferroelectric and structural instability of (Pb,Ca)TiO3 thin films prepared in an oxygen atmosphere and deposited on LSCO thin films which act as a buffer layer
DOI:10.1016/j.ceramint.2013.08.063  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Pontes, D. S. L.;Pontes, F. M.;Pereira-da-Silva, Marcelo A.;Zampieria, M.;Chiquito, A. J.;Pizani, P. S.;Longo, E.;
7:1:175:2     Microstructure and electric properties of (Pb0.8Ca0.2)TiO3 thin films prepared by rf magnetron sputtering with a seed layer
DOI:10.1016/j.matlet.2012.04.044  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: Fu, M.;Chi, Q. G.;Wang, X.;Chen, Y.;Lei, Q. Q.;
7:1:175:3     Crystallization behaviors and electric properties of (Pb0.8Ca0.2)TiO3 thin films prepared by a sol-gel route
DOI:10.1016/j.apsusc.2013.02.115  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:1  AU: Chi, Q. G.;Zhu, H. F.;Lin, J. Q.;Chen, C. T.;Wang, X.;Chen, Y.;Lei, Q. Q.;
7:1:175:4     Phase compositions and ferroelectric properties of Pb(Zr-0.52,Ti-0.48)O-3 thin films with different highly orientations prepared by a sol-gel route
DOI:10.1016/j.apsusc.2010.03.082  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:5  AU: Chi, Q. G.;Li, W. L.;Fei, W. D.;Xu, S. C.;Feng, B.;
7:1:175:5     Fatigue improvement in modified lead zirconate titanate ceramics through employment of La0.8Sr0.2MnO3 buffer layers
DOI:10.1016/j.ceramint.2012.06.012  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Wen, Baohua;Zhang, Yong;Liu, Xiaolin;Ma, Liang;Wang, Xiangrong;
7:1:175:6     Enhanced ferroelectric properties of La-substituted BiFeO3 thin films on LaSrCoO3/Pt/TiO2/SiO2/Si (100) substrates prepared by the soft chemical method
DOI:10.1016/j.ceramint.2012.01.034  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:9  AU: Simoes, A. Z.;Ramirez, M. A.;Foschini, C. R.;Moura, F.;Varela, J. A.;Longo, E.;
7:1:175:7     Composition dependent preferential orientation, dielectric and ferroelectric properties of Pb(ZrxTi1 (-) (x) )O-3 thin films derived by sol-gel process
DOI:10.1016/j.matlet.2010.12.022  JN:MATERIALS LETTERS  PY:2011
  TC:5  AU: Jegatheesan, P.;Yadav, Harish Kumar;Gupta, Vinay;Giridharan, N. V.;
7:1:175:8     Piezoelectric properties and fatigue characteristics of highly (100)-oriented (Pb1-x-yLaxCay)Ti1-x/4O3 thin films
DOI:10.1016/j.matlet.2012.11.110  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Chi, Q. G.;Zhu, H. F.;Lin, J. Q.;Yang, F. Y.;Lei, Q. Q.;
7:1:175:9     The thickness effect of Bi3.25La0.75Ti3O12 buffer layer in PbZr0.58Ti0.42O3/Bi3.25La0.75Ti3O12 (PZT/BLT) multilayered ferroelectric thin films
DOI:10.1016/j.tsf.2011.04.006  JN:THIN SOLID FILMS  PY:2011
  TC:5  AU: Li, Jianjun;Li, Ping;Zhang, Guojun;Yu, Jun;Wu, Yunyi;Wen, Xinyi;
7:1:176:1     Influence of dc bias electric field on Vogel-Fulcher dynamics in relaxor ferroelectrics
DOI:10.1103/PhysRevB.83.132105  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Bobnar, V.;Erste, A.;Chen, X. -Z.;Jia, C. -L.;Shen, Q. -D.;
7:1:176:2     Contributions of distinctive dynamic processes to dielectric response of a relaxorlike reduced poly(vinylidene fluoride-trifluoroethylene) copolymer
DOI:10.1103/PhysRevB.81.214103  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Erste, A.;Filipic, C.;Levstik, A.;Bobnar, V.;Chen, X. -Z.;Jia, C. -L.;Shen, Q. -D.;
7:1:176:3     Nonlinear Magnetoelectric Effect in Magnetically Disordered Relaxor Ferroelectrics
DOI:10.1080/00150193.2010.505861  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Pirc, R.;Blinc, R.;
7:1:176:4     Impact of the Electric Field on the Freezing Dynamics of Pb(Mg1/3Nb2/3)O-3
DOI:10.1080/00150193.2012.671094  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Novak, N.;Pirc, R.;Kutnjak, Z.;
7:1:176:5     Structural and dielectric properties of poly(vinylidene fluoride)-based terpolymer/copolymer blends developed on aluminum foil
DOI:10.1063/1.4748181  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Erste, A.;Chen, X-Z;Cheng, Z-X;Shen, Q-D;Bobnar, V.;
7:1:176:6     Dielectric Investigations of Relaxor Reduced Poly(Vinylidene Fluoride-Trifluoroethylene) Copolymer in DC Bias Electric Field
DOI:10.1080/00150193.2012.674443  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Erste, Andreja;Chen, Xian-Zhong;Jia, Cheng-Liang;Shen, Qun-Dong;Bobnar, Vid;
7:1:176:7     Tailored Ferroelectric Responses and Enhanced Energy Density in PVDF-Based Homopolymer/Terpolymer Blends
DOI:10.1002/app.40994  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2014
  TC:0  AU: Gao, Lei;He, Jinliang;Hu, Jun;Li, Yang;
7:1:176:8     Theory of the magnetoeletric effect in a lightly doped high-T-c cuprate
DOI:10.1103/PhysRevB.85.140405  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Mukherjee, S.;Andersen, B. M.;Viskadourakis, Z.;Radulov, I.;Panagopoulos, C.;
7:1:177:1     Structural and Electrical Properties of Lead-Free Perovskite Ba(Al1/2Nb1/2)O-3
DOI:10.1111/j.1551-2916.2009.03394.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:19  AU: Prasad, Kamal;Chandra, Kumar Prabhat;Bhagat, Sanjay;Choudhary, Shambhu Nath;Kulkarni, Ajit R.;
7:1:177:2     Flexible PVDF-BaTiO3 Nanocomposites as Potential Materials for Pressure Sensors
DOI:10.1080/00150193.2013.821834  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Olmos, D.;Gonzalez-Gaitano, G.;Kholkin, A. L.;Gonzalez-Benito, J.;
7:1:177:3     Structural and electrical properties of lead-free perovskite ceramic: Ba(In1/2Nb1/2)O-3
DOI:10.1016/j.jnoncrysol.2010.11.020  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2011
  TC:3  AU: Prasad, K.;Priyanka;Chandra, K. P.;Kulkarni, A. R.;
7:1:177:4     Dielectric Properties of Modified SrFe0.5Nb0.5O3 Ceramics Prepared by a Solid-State Reaction Technique
DOI:10.1080/00150193.2013.842720  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Phatungthane, Thanatep;Rujijanagul, Gobwute;
7:1:177:5     Dielectric, modulus and impedance analysis of lead-free ceramics Ba0.8La0.133Ti1-xSnxO3 (x=0.15 and 0.2)
DOI:10.1007/s00339-012-6935-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Rhouma, F. I. H.;Dhahri, A.;Dhahri, J.;Valente, M. A.;
7:1:177:6     Preparation and dielectric properties of (Sr1-xCax)Fe0.5Nb0.5O3; (x=0.0, 0.1, 0.2) ceramics
DOI:10.1016/j.ceramint.2012.10.032  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Phatungthane, Thanatep;Rujijanagul, Gobwute;
7:1:177:7     Huge Dielectric Properties of CdCu3Ti4O12 with CCTO Structure
DOI:10.1080/00150193.2011.577377  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Sasaki, M.;Tashiro, T.;Abiko, K.;Kamimura, Y.;Takesada, M.;Onodera, A.;
7:1:177:8     Electrical Conduction in 0-3 BaTiO3/PVDF Composites
DOI:10.1080/10584587.2010.489425  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:5  AU: Prasad, K.;Prasad, A.;Chandra, K. P.;Kulkarni, A. R.;
7:1:177:9     Electrical Properties of the Perovskite Ba(Pr1/2Ta1/2)O-3 Ceramic
DOI:10.1080/10584587.2010.503523  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:0  AU: Mishra, Amodini;Prasad, K.;Choudhary, S. N.;Choudhary, R. N. P.;
7:1:177:10     Structural and electrical properties of Ba(Sb1/2Nb1/2)O-3 ceramic
DOI:10.1007/s10853-010-5041-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:3  AU: Prasad, K.;Chandra, K. P.;Priyanka;Kulkarni, A. R.;
7:1:177:11     Dielectric Properties in CaCu3Ti4O12 Single Crystal at High Temperatures
DOI:10.1080/00150191003711376  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Kawatani, K.;Takesada, M.;Fukunaga, M.;Oda, M.;Ido, M.;Onodera, A.;
7:1:178:1     Magnetic and magnetostrictive properties in high-pressure synthesized Dy1-xPrxFe1.9(0 <= x <= 1) cubic Laves alloys
DOI:10.1016/j.jallcom.2010.07.117  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Shi, Y. G.;Tang, S. L.;Lv, L. Y.;Fan, J. Y.;
7:1:178:2     Synthesis, magnetic properties and magnetostriction of Pr0.5Nd0.5(Fe1-xCox)(1.9) cubic Laves alloys
DOI:10.1016/j.jallcom.2014.05.082  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Hu, C. C.;Shi, Y. G.;Chen, Z. Y.;Shi, D. N.;Tang, S. L.;Du, Y. W.;
7:1:178:3     Structural, magnetic and magnetostrictive behavior in Nd(Fe1-xCox)(1.9) compounds
DOI:10.1063/1.4752017  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Hu, C. C.;Shi, Y. G.;Zheng, T. F.;Fan, J. Y.;Shi, D. N.;Lv, L. Y.;Tang, S. L.;
7:1:178:4     Structure, magnetic properties and magnetostriction in NdFe1.9 bulk nanocrystalline alloys
DOI:10.1016/j.jallcom.2013.02.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Shi, Y. G.;Hu, C. C.;Zhou, X. G.;Fan, J. Y.;Shi, D. N.;Lv, L. Y.;Tang, S. L.;
7:1:178:5     Synthesis and magnetostrictive properties of Pr(Fe1.95B0.05)(1.93) bulk nanocrystalline alloy
DOI:10.1063/1.4767127  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Shi, Y. G.;Hu, C. C.;Fan, J. Y.;Shi, D. N.;Lv, L. Y.;Tang, S. L.;
7:1:178:6     Magnetostrictive properties of Tb-x(Pr0.5Nd0.5)(1-x)Fe-1.93 cubic Laves alloys
DOI:10.1016/j.jallcom.2013.07.083  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Shi, Y. G.;Zhou, X. G.;Hu, C. C.;Shi, D. N.;Lv, L. Y.;Tang, S. L.;
7:1:178:7     Magnetostriction in high-pressure synthesized PrxNd1-xFe1.9 (0 <= x <= 1) alloys
DOI:10.1063/1.3540692  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Shi, Y. G.;Zhai, L.;Tang, S. L.;Chen, R. J.;
7:1:178:8     Magnetostrictive properties of the heavy-rare-earth-free Sm1-xNdxFe2 compounds
DOI:10.1063/1.4801340  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Wang, Y.;Ren, W. J.;Yang, Y. H.;Li, B.;Li, J.;Zhang, Z. D.;
7:1:178:9     Structure and magnetostriction of Ho1-xPrxFe1.9 alloys
DOI:10.1016/j.jmmm.2011.12.023  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:4  AU: Shi, Y. G.;Zhai, L.;Wang, Y.;Fan, J. Y.;Shi, D. N.;Tang, S. L.;Du, Y. W.;
7:1:179:1     Effect of rare earth ion doping on the structural, microstructural and diffused phase transition characteristics of BaBi2Nb2O9 relaxor ferroelectrics
DOI:10.1016/j.ceramint.2014.07.076  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Kannan, B. Rajesh;Venkataraman, B. Harihara;
7:1:179:2     Effect of oxidizing atmosphere on ferroelectric and piezoelectric response of CaBi2Nb2O9 thin films
DOI:10.1016/j.matchemphys.2010.08.059  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:9  AU: Simoes, A. Z.;Aguiar, E. C.;Riccardi, C. S.;Longo, E.;Varela, J. A.;Mizaikoff, B.;
7:1:179:3     Dielectric and ferroelectric properties of SrBi4Ti4O15-Sr2Bi4Ti5O18 composite ceramics
DOI:10.1016/j.ceramint.2014.06.087  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Parida, Geetanjali;Bera, J.;
7:1:179:4     Electrical properties of niobium doped Bi4Ti3O12-SrBi4Ti4O15 intergrowth feffoelectrics
DOI:10.1016/j.ceramint.2013.09.131  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Parida, Geetanjali;Bera, J.;
7:1:179:5     New Ferroelectric Aurivillius Oxides: Incorporation of Sc3+ in Stoichiometric Compositions
DOI:10.1021/cm102800x  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:12  AU: Sivakumar, Thathan;Itoh, Mitsuru;
7:1:179:6     Influence of vanadium dopant on relaxor behavior of BaBi2Nb2O9 ceramics
DOI:10.1016/j.ceramint.2012.11.057  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Adamczyk, M.;Kozielski, L.;Pilch, M.;Pawelczyk, M.;Soszynski, A.;
7:1:179:7     Structure, dielectric and ferroelectric anisotropy of Sr2-xCaxBi4Ti5O18 ceramics
DOI:10.1016/j.materresbull.2010.11.029  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:6  AU: Jin, Shuo;Miranda Salvado, Isabel M.;Costa, Maria Elisabete V.;
7:1:179:8     Ferroelectric domain structures of epitaxial CaBi2Nb2O9 thin films on single crystalline Nb doped (100) SrTiO3 substrates
DOI:10.1016/j.jcrysgro.2015.04.020  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Ahn, Yoonho;Seo, Jeong Dae;Son, Jong Yeog;
7:1:179:9     Effects of Dy Substitution for Bi on Phase, Microstructure and Dielectric Properties of Layer-structured Bi4-xDyxTi3O12 Ceramics
DOI:10.1080/00150193.2013.850001  JN:FERROELECTRICS  PY:2014
  TC:3  AU: Thongmee, Navavan;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:1:180:1     High Power Characteristics of Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2012.05462.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:12  AU: Lee, Hyeong Jae;Ural, Seyit O.;Chen, Lei;Uchino, Kenji;Zhang, Shujun;
7:1:180:2     Electromechanical Properties of Acceptor-Doped Lead-Free Piezoelectric Ceramics
DOI:10.1111/jace.12805  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Taghaddos, Elaheh;Hejazi, Mehdi;Safari, Ahmad;
7:1:180:3     Structural and electrical properties of double doped (Fe3+ and Ba2+) PZT electroceramics
DOI:10.1016/j.ceramint.2013.08.014  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Kumar, B. Praveen;Sangawar, S. R.;Kumar, H. H.;
7:1:180:4     High Power Performance of Manganese-Doped BNT-Based Pb-Free Piezoelectric Ceramics
DOI:10.1111/jace.13098  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Hejazi, Mehdi;Taghaddos, Elaheh;Gurdal, Erkan;Uchino, Kenji;Safari, Ahmad;
7:1:180:5     Spin-Hamiltonian parameters and defect structure for the tetragonal Mo5+ center in the reduced BaTiO3:Mo crystal
DOI:10.1016/j.jmmm.2013.08.010  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:4  AU: Mei, Yang;Zheng, Wen-Chen;
7:1:180:6     High Power Piezoelectric Characteristics for Perovskite-Type Lead-Free Ferroelectric Ceramics
DOI:10.1080/10584587.2010.488548  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Nagata, Hajime;Hiruma, Yuji;Takenaka, Tadashi;
7:1:180:7     Investigations of the optical spectral bands, g factors and local structure for the tetragonal Cr5+ tetrahedral clusters in Cr-doped silica glasses
DOI:10.1016/j.jallcom.2014.06.069  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Mei, Yang;Zheng, Wen-Chen;Chen, Bo-Wei;Wei, Cheng-Fu;
7:1:181:1     PZT-Based Piezoelectric MEMS Technology
DOI:10.1111/j.1551-2916.2012.05155.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:29  AU: Smith, Gabriel L.;Pulskamp, Jeffrey S.;Sanchez, Luz M.;Potrepka, Daniel M.;Proie, Robert M.;Ivanov, Tony G.;Rudy, Ryan Q.;Nothwang, William D.;Bedair, Sarah S.;Meyer, Christopher D.;Polcawich, Ronald G.;
7:1:181:2     Pulsed-laser deposited Pb(Zr-0.52,Ti-0.48)O-3-on-silicon resonators with high-stopband rejection using feed-through cancellation
DOI:10.1063/1.4792739  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Yagubizade, H.;Darvishi, M.;Chen, Y. -Y.;Nguyen, M. D.;Dekkers, J. M.;Wiegerink, R. J.;Elwenspoek, M. C.;Tas, N. R.;
7:1:181:3     A 4th-order band-pass filter using differential readout of two in-phase actuated contour-mode resonators
DOI:10.1063/1.4826944  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Yagubizade, Hadi;Darvishi, Milad;Elwenspoek, Miko C.;Tas, Niels R.;
7:1:181:4     High rejection, tunable parallel resonance in micromachined lead zirconate titanate on silicon resonators
DOI:10.1063/1.3636432  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Bedair, Sarah S.;Judy, Daniel;Pulskamp, Jeffrey;Polcawich, Ronald G.;Gillon, Adam;Hwang, Eugene;Bhave, Sunil;
7:1:181:5     A 4th-order band-pass filter using differential readout of two in-phase actuated contour-mode resonators (vol 103, 173517, 2013)
DOI:10.1063/1.4830426  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Yagubizade, Hadi;Darvishi, Milad;Elwenspoek, Miko C.;Tas, Niels R.;
7:1:181:6     Dilatometric behaviour of doped barium titanate ceramic
DOI:10.1016/j.matlet.2012.10.131  JN:MATERIALS LETTERS  PY:2013
  TC:0  AU: Mahajan, Sandeep;Haridas, Divya;Thakur, O. P.;Prakash, Chandra;
7:1:182:1     Structural, microstructural, optical and electrical properties of (Pb,Ba,Sr)TiO3 films growth on conductive LaNiO3-coated LaAO(3)(100) and Pt/Ti/SiO2/Si substrates
DOI:10.1016/j.matlet.2014.01.119  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Pontes, D. S. L.;Capeli, R. A.;Garzim, M. L.;Pontes, F. M.;Chiquito, A. J.;Longo, E.;
7:1:182:2     Manganese doping effects on interband electronic transitions, lattice vibrations, and dielectric functions of perovskite-type Ba0.4Sr0.6TiO3 ferroelectric ceramics
DOI:10.1007/s00339-011-6701-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:3  AU: Jiang, Kai;Zhang, Jinzhong;Yu, Wenlei;Hu, Zhigao;Chu, Junhao;
7:1:182:3     Optical and electro-optic anisotropy of epitaxial Ba0.7Sr0.3TiO3 thin films
DOI:10.1063/1.3302453  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Wang, D. Y.;Li, S.;Chan, H. L. W.;Choy, C. L.;
7:1:182:4     Influence of crystal phase and transparent substrates on electro-optic properties of lead zirconate titanate films
DOI:10.1063/1.3520459  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Zhu, M. M.;Du, Z. H.;Ma, J.;
7:1:182:5     Sr- and Ti-site substitution, lattice dynamics, and octahedral tilt transition relationship in SrTiO3:Mn ceramics
DOI:10.1016/j.actamat.2009.09.036  JN:ACTA MATERIALIA  PY:2010
  TC:8  AU: Tkach, Alexander;Vilarinho, Paula M.;Nuzhnyy, Dmitry;Petzelt, Jan;
7:1:182:6     Role of trivalent Sr substituents and Sr vacancies in tetragonal and polar states of SrTiO3
DOI:10.1016/j.actamat.2011.05.011  JN:ACTA MATERIALIA  PY:2011
  TC:8  AU: Tkach, A.;Correia, T. M.;Almeida, A.;Agostinho Moreira, J.;Chaves, M. R.;Okhay, O.;Vilarinho, P. M.;Gregora, I.;Petzelt, J.;
7:1:182:7     Structural evaluation of sol-gel derived lead strontium titanate diffusion barrier for integration in lead zirconate titanate transducer design
DOI:10.1016/j.tsf.2009.10.120  JN:THIN SOLID FILMS  PY:2010
  TC:2  AU: Bhattacharyya, D.;Lueker, A.;Zhang, Q.;Kirby, P. B.;
7:1:182:8     Microstructure and Optical Property in an Irregular Multilayer Comprising Ferroelectric and Paraelectric Materials
DOI:10.1111/jace.12132  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:0  AU: Cong, R.;Hu, G. J.;Hong, X. K.;Yu, G. L.;Chu, J. H.;Dai, N.;
7:1:182:9     Study of compositional change in the interfacial regions between lead strontium titanate/SiO2 and lead zirconate titanate/SiO2 by Auger emission spectroscopy
DOI:10.1016/j.tsf.2009.11.018  JN:THIN SOLID FILMS  PY:2010
  TC:1  AU: Lueker, Arne;Zhang, Qi;Kirby, Paul B.;
7:1:183:1     Morphotropic phase boundary and electrical properties of lead-free (K0.5Bi0.5)TiO3-Bi(Ni0.5Ti0.5)O-3 relaxor ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.05.009  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:10  AU: Zhao, Wanli;Zuo, Ruzhong;
7:1:183:2     Elaboration and dielectric study of ferroelectric or relaxor ceramics in the ternary system BaTiO3-NaNbO3-BaSnO3
DOI:10.1016/j.jallcom.2011.04.149  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Aydi, Abdelhedi;Simon, Annie;Michau, Dominique;Von Der Muehll, Regnault;Abdelmoula, Najmeddine;Khemakhem, Hamadi;
7:1:183:3     Dielectric properties of Bi-doped Ba0.8Sr0.2TiO3 ceramic solid solutions
DOI:10.1016/j.ceramint.2013.03.010  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Bahri, Fathi;Khemakhem, Hamadi;
7:1:183:4     X-ray diffraction, dielectric and Raman spectroscopy studies of Ba1-xNd2x/3(Ti0.9Zr0.1)O-3 ceramics
DOI:10.1016/j.ceramint.2014.02.115  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Kaddoussi, H.;Abdelmoula, N.;Gagou, Y.;Mezzane, D.;Khemakhem, H.;Elmarssi, M.;
7:1:183:5     Structure, dielectric and piezoelectric properties of NaNbO3-Ba-0.6(Bi0.5K0.5)(0.4)TiO3 lead-free ceramics
DOI:10.1016/j.materresbull.2012.10.056  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:0  AU: Fan, Ximing;Zheng, Qiaoji;Lin, Dunmin;Sun, Hailing;Wan, Yang;Wu, Xiaochun;Wu, Lang;
7:1:183:6     Raman and dielectric investigation of (Ba0.9-xSrxCa0.1)(Ti0.8Zr0.2)O-3 ferroelectric ceramics
DOI:10.1016/j.ceramint.2013.12.138  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Bahri, Fathi;Khemakhem, Hamadi;
7:1:183:7     Relaxor ferroelectric behavior of La substituted BPZT ceramics
DOI:10.1016/j.ceramint.2010.01.017  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:5  AU: Juneja, J. K.;Kumar, Parveen;Singh, Sangeeta;Prakash, Chandra;Raina, K. K.;
7:1:183:8     X-ray diffraction, dielectric, conduction and Raman studies in Na0.925Bi0.075Nb0.925Mn0.075O3 ceramic
DOI:10.1063/1.3684961  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Chaker, Chiheb;Gagou, Y.;Abdelmoula, N.;Dellis, J. -L.;Masquelier, C.;Khemakhem, H.;El Marssi, M.;
7:1:183:9     X-ray diffraction, dielectric, pyroelectric, piezoelectric and Raman spectroscopy studies on (Ba0.95Ca0.05)(0.8875)Bi0.075TiO3 ceramic
DOI:10.1016/j.ceramint.2011.12.015  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Zaghouene, H.;Khemakhem, H.;Simon, A.;
7:1:184:1     Enhancement in dielectric, ferroelectric, and electrostrictive properties of Pb(Mg1/3Nb2/3)(0.9)Ti0.1O3 ceramics by CuO addition
DOI:10.1016/j.jallcom.2013.10.249  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Promsawat, M.;Wong, J. Y. Y.;Ren, Z.;Tailor, H. N.;Watcharapasorn, A.;Ye, Z. -G.;Jiansirisomboon, S.;
7:1:184:2     Evidence of macro-micro domain transition in poled PMN-PZT ceramics
DOI:10.1016/j.ceramint.2013.05.044  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Du, Gang;Liang, Ruihong;Wang, Junxia;Wang, Li;Zhang, Wenbin;Wang, Genshui;Dong, Xianlin;
7:1:184:3     Investigation of Phase Structure and Electrical Properties of Doped PMN-PZT Ceramics Prepared by Different Methods
DOI:10.1111/j.1551-2916.2011.04974.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Wang, Li;Liang, Ruihong;Mao, Chaoliang;Gao, Min;Du, Gang;Cao, Fei;Wang, Genshui;Dong, Xianlin;
7:1:184:4     Excellent electrostrictive properties of low temperature sintered PZT ceramics with high concentration LiBiO2 sintering aid
DOI:10.1016/j.ceramint.2012.06.065  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Liang, Rui-hong;Zhang, Wang-zhong;Gao, Min;Wang, Li;Dong, Xian-lin;
7:1:184:5     Effect of CuO Addition on the Microstructure and Electric Properties of Low-Temperature Sintered 0.25PMN-0.40PT-0.35PZ Ceramics
DOI:10.1111/jace.12026  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Wang, Li;Mao, Chaoliang;Wang, Genshui;Du, Gang;Liang, Ruihong;Dong, Xianlin;
7:1:184:6     Effects of sintering temperature on microstructure and electrical properties of 0.9Pb(Mg1/3Nb2/3)O-3-0.1PbTiO(3) modified with CuO
DOI:10.1016/j.matchemphys.2013.05.060  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:2  AU: Promsawat, Methee;Wong, Jenny Y. Y.;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:1:184:7     Enhanced dielectric, ferroelectric, and electrostrictive properties of Pb(Mg1/3Nb2/3)(0.9)Ti0.1O3 ceramics by ZnO modification
DOI:10.1063/1.4801881  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Promsawat, Methee;Watcharapasorn, Anucha;Tailor, Hamel N.;Jiansirisomboon, Sukanda;Ye, Zuo-Guang;
7:1:184:8     Effects of CuO nanoparticles addition on properties of PMNT ceramics
DOI:10.1016/j.ceramint.2012.10.037  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Promsawat, Methee;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:1:184:9     Novel ferroelectric single crystals of Bi(Zn1/2Ti1/2)O-3-PbZrO3-PbTiO3 ternary solid solution
DOI:10.1063/1.4865795  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Wang, Bixia;Xie, Yujuan;Zhuang, Jian;Wu, Xiaoqing;Ren, Wei;Ye, Zuo-Guang;
7:1:185:1     Improved leakage property and reduced crystallization temperature by V2O5 seed layer in K0.4Na0.6NbO3 thin films derived from chemical solution deposition
DOI:10.1016/j.jallcom.2012.10.072  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Li, N.;Li, W. L.;Wang, L. D.;Xu, D.;Chi, Q. G.;Fei, W. D.;
7:1:185:2     Effect of V doping on phase composition and electrical properties of K0.4Na0.6Nb1-xVxO3 thin films
DOI:10.1016/j.jallcom.2011.05.002  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Li, N.;Li, W. L.;Wang, L. D.;Zhang, S. Q.;Ye, J. W.;Fei, W. D.;
7:1:185:3     Dielectric behavior of samarium-doped BaZr0.2Ti0.8O3 ceramics
DOI:10.1016/j.materresbull.2013.10.001  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:3  AU: Li, Yuanliang;Wang, Ranran;Ma, Xuegang;Li, Zhongqiu;Sang, Rongli;Qu, Yuanfang;
7:1:185:4     Synthesis and Ferroelectric Properties of Bi4.5Sr0.5Ti4Fe0.5-xVxO15 Ceramics
DOI:10.1080/00150193.2012.674433  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Kan, Akinori;Ogawa, Hirotaka;Kawada, Kyoshiro;Moriyama, Tohru;
7:1:185:5     Temperature dependence on the electrical properties of Ba(Ti0.90Zr0.10)O-3:2V ceramics
DOI:10.1016/j.matchemphys.2010.05.058  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:6  AU: Moura, F.;Simoes, A. Z.;Paskocimas, C. A.;Zaghete, M. A.;Varela, J. A.;Longo, E.;
7:1:185:6     Effect of Nb2O5 seed layer on electrical properties of alkaline niobate based ferroelectric thin films
DOI:10.1016/j.matlet.2010.12.046  JN:MATERIALS LETTERS  PY:2011
  TC:4  AU: Li, N.;Li, W. L.;Wang, L. D.;Zhang, S. Q.;Fei, W. D.;
7:1:185:7     Preparation and Ferroelectric Properties of K0.5Na0.5NbO3 Thin Films Derived from Non-alcohol Niobium Salt Sol-gel Process
DOI:10.1080/10584587.2014.904166  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Zhang, Deqing;Zheng, Fangyuan;Yang, Xiuying;Feng, Lianzheng;Huang, Xiaoming;Liu, Hongmei;Cao, Maosheng;
7:1:185:8     Precursor Homogeneity and Crystallization Effects in Chemical Solution Deposition-Derived Alkaline Niobate Thin Films
DOI:10.1111/j.1551-2916.2010.04339.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Roescher, Mark;Tappertzhofen, Stefan;Schneller, Theodor;
7:1:186:1     Piezoelectric anisotropy of a KNbO3 single crystal
DOI:10.1063/1.3511336  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Liang, Linyun;Li, Y. L.;Hu, S. Y.;Chen, Long-Qing;Lu, Guang-Hong;
7:1:186:2     Tetragonal-Orthorhombic Phase Transition in Barium Titanate via Monoclinic M-C Type Symmetry
DOI:10.1080/00150193.2012.707894  JN:FERROELECTRICS  PY:2012
  TC:8  AU: Eisenschmidt, Ch.;Langhammer, H. T.;Steinhausen, R.;Schmidt, G.;
7:1:186:3     Monoclinic phases arising across thermal inter-ferroelectric phase transitions
DOI:10.1103/PhysRevB.90.024104  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Gu, Yijia;Xue, Fei;Lei, Shiming;Lummen, Tom T. A.;Wang, Jianjun;Gopalan, Venkatraman;Chen, Long-Qing;
7:1:186:4     Microscopic scale investigation of piezoelectric properties of lead-free alkaline niobates
DOI:10.1063/1.4838115  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Machado, R.;Sepliarsky, M.;Stachiotti, M. G.;
7:1:186:5     Ferroelectric to Relaxor Crossover in Perovskite-type Systems
DOI:10.1080/00150193.2014.874856  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Zenkner, Mandy;Straube, Ulrich;Schmidt, Guenther;
7:1:186:6     Off-center impurities in a robust ferroelectric material: Case of Li in KNbO3
DOI:10.1103/PhysRevB.86.094118  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Machado, R.;Sepliarsky, M.;Stachiotti, M. G.;
7:1:186:7     Pressure and electric field effects on piezoelectric responses of KNbO3
DOI:10.1063/1.4752418  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Liang, Linyun;Li, Y. L.;Xue, Fei;Chen, Long-Qing;
7:1:186:8     Formation of monoclinic nanodomains at the morphotropic phase boundary of ferroelectric systems
DOI:10.1103/PhysRevB.88.214105  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:1:187:1     Ultra high strain properties of lanthanum substituted PZT electro-ceramics prepared via mechanical activation
DOI:10.1016/j.jallcom.2014.02.037  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Kumar, Ajeet;Prasad, V. V. Bhanu;Raju, K. C. James;James, A. R.;
7:1:187:2     The effect of temperature on the large field electromechanical response of relaxor ferroelectric 8/65/35 PLZT
DOI:10.1016/j.actamat.2011.01.009  JN:ACTA MATERIALIA  PY:2011
  TC:13  AU: Rauls, Michael B.;Dong, Wen;Huber, John E.;Lynch, Christopher S.;
7:1:187:3     Influence of lanthanum doping on the morphotropic phase boundary of lead zirconate titanate
DOI:10.1063/1.3437399  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Hinterstein, Manuel;Schoenau, Kristin A.;Kling, Jens;Fuess, Hartmut;Knapp, Michael;Kung, Hans;Hoffmann, Michael J.;
7:1:187:4     Chemical synthesis, structural, thermo-physical and electrical property characterization of PLZT ceramics
DOI:10.1016/j.jallcom.2010.02.132  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: James, A. R.;Kumar, Rajesh;PremKumar, M.;Srinivas, K.;Radha, V.;Vithal, M.;Vijayakumar, M.;
7:1:187:5     Electrical creep around a circular hole in PLZT 8/65/35
DOI:10.1016/j.jeurceramsoc.2011.08.008  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Liu, Q. D.;Huber, J. E.;
7:1:187:6     Mechanically activated PLZT ceramics: Structural and electrical properties
DOI:10.1016/j.materresbull.2012.07.004  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:2  AU: James, A. R.;Praveen, J. Paul;Premkumar, M.;Prasad, V. V. Bhanu;
7:1:187:7     Giant piezoelectricity in PMN-PT thin films: Beyond PZT
DOI:10.1557/mrs.2012.266  JN:MRS BULLETIN  PY:2012
  TC:5  AU: Baek, Seung-Hyub;Rzchowski, Mark S.;Aksyuk, Vladimir A.;
7:1:188:1     Structure analysis of bismuth sodium titanate-based A-site relaxor ferroelectrics by electron diffraction
DOI:10.1016/j.jeurceramsoc.2013.03.020  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:5  AU: Cheng, Shun-Yu;Shieh, Jay;Lu, Hong-Yang;Shen, Chang-Yi;Tang, Yao-Chieh;Ho, New-Jin;
7:1:188:2     (K, Na)NbO3-based lead-free piezoelectric ceramics manufactured by two-step sintering
DOI:10.1016/j.ceramint.2011.11.022  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:13  AU: Pang, Xuming;Qiu, Jinhao;Zhu, Kongjun;Du, Jianzhou;
7:1:188:3     Dielectric and Ferroelectric Properties of Ba(Ti0.82Sn0.18)O-3 Ceramics Prepared by Two-Steps Sintering
DOI:10.1080/00150193.2013.848768  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Kruea-In, Chatchai;Bakethaisong, Suchawadee;Rujijanagul, Gobwute;
7:1:188:4     Polar Nanoregions and Dielectric Properties of BaTiO3-Based Y5V Multilayer Ceramic Capacitors
DOI:10.1111/jace.12896  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Hong, Jian-Yu;Lu, Hong-Yang;
7:1:188:5     Crystal Symmetry of BaTiO3 Grains in X7R Multilayer Ceramic Capacitors
DOI:10.1111/j.1551-2916.2010.04232.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Lee, Hwan-Wen;Chu, Mike S. H.;Lu, Hong-Yang;
7:1:188:6     Structural Disorder, Polarisation and the Normal to Relaxor Ferroelectric Transition in BaTiO3 Based Perovskites
DOI:10.1080/00150191003697039  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Liu, Y.;Withers, R. L.;
7:1:188:7     Phase-transformation-induced microstructure in lead-free ferroelectric ceramics based on (Bi0.5Na0.5)TiO3-BaTiO3-(Bi0.5K0.5)TiO3
DOI:10.1080/14786435.2011.600735  JN:PHILOSOPHICAL MAGAZINE  PY:2011
  TC:1  AU: Cheng, Shun-Yu;Shieh, Jay;Ho, New-Jin;Lu, Hong-Yang;
7:1:188:8     Study on the sintering mechanism of KNN-based lead-free piezoelectric ceramics
DOI:10.1007/s10853-010-5080-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:6  AU: Pang, Xuming;Qiu, Jinhao;Zhu, Kongjun;Luo, Jun;
7:1:189:1     A simple method to synthesize Ba0.6Sr0.4TiO3 nano-powders through high-energy ball-milling
DOI:10.1016/j.powtec.2011.05.010  JN:POWDER TECHNOLOGY  PY:2011
  TC:8  AU: Liu, Cheng;Liu, Peng;Lu, Xiao-gang;Gao, Chang-jie;Zhu, Gang-qiang;Chen, Xiao-ming;
7:1:189:2     High-porosity Ba1-xSrxTiO3 ceramics from particle-stabilized emulsions
DOI:10.1016/j.ceramint.2014.02.126  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Wang, Xiang;Li, Jin-hong;Zhang, Hong-yao;Guan, Wei-min;
7:1:189:3     Structure and dielectric behavior of nano-structure ferroelectric BaxSr1-xTiO3 prepared by sol-gel method
DOI:10.1016/j.jallcom.2010.05.060  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Mahani, R. M.;Battisha, I. K.;Aly, M.;Abou-Hamad, A. B.;
7:1:189:4     A novel method for preparation of barium strontium titanate nanopowders
DOI:10.1016/j.matlet.2010.02.034  JN:MATERIALS LETTERS  PY:2010
  TC:9  AU: Zuo, X. H.;Deng, X. Y.;Chen, Y.;Ruan, M.;Li, W.;Liu, B.;Qu, Y.;Xu, B.;
7:1:189:5     Dielectric evaluation of electrically tunable Ba0.6Sr0.4TiO3 thick films prepared by screen printing
DOI:10.1016/j.ceramint.2011.12.060  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Zhang, Xiao-Fei;Xu, Qing;Zhan, Di;Liu, Han-Xing;Chen, Wen;Huang, Duan-Ping;
7:1:189:6     Low-temperature synthesis of superfine barium strontium titanate powder by the citrate method
DOI:10.1016/j.ceramint.2010.02.004  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:5  AU: Zhang, Xiao-Fei;Xu, Qing;Huang, Yu-Heng;Liu, Han-Xing;Huang, Duan-Ping;Zhang, Feng;
7:1:189:7     Synthesis and Characterization of Thermochromic La0.75Ca0.25MnO3 Perovskite Manganites Nano-powders by Microwave-assisted Solution Combustion Synthesis
DOI:10.1080/10584587.2014.874821  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Kahatta, Sagulthai;Techitdheera, Wicharn;Chaiyo, Nopsiri;Pecharapa, Wisanu;Vittayakorn, Naratip;
7:1:190:1     Microstructural and optical investigations of Ce-doped barium titanate thin films by FTIR and spectroscopic ellipsometry
DOI:10.1080/14786435.2011.642320  JN:PHILOSOPHICAL MAGAZINE  PY:2012
  TC:3  AU: Mohamed, S. H.;Dughaish, Z. H.;
7:1:190:2     Control of ferroelectric phase transition in nano particulate NBT-BT based ceramics
DOI:10.1016/j.mseb.2012.12.001  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:6  AU: Devi, Ch. Sameera;Kumar, G. S.;Prasad, G.;
7:1:190:3     Hollow and hollow core/shell CeO2/SiO2@CeO2 spheres: Synthesis, structure evolution and catalytic properties
DOI:10.1016/j.jallcom.2013.10.080  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Sun, Yixin;Zhang, Lixin;Wang, Yongbin;Chen, Peng;Xin, Shuxiang;Jiu, Hongfang;Liu, Jianwei;
7:1:190:4     Influence of the Nd3+ ions content on the FTIR and the visible up-conversion luminescence properties of nano-structure BaTiO3, prepared by sol-gel technique
DOI:10.1016/j.jallcom.2009.09.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Darwish, A. G. A.;Badr, Y.;El Shaarawy, M.;Shash, N. M. H.;Battisha, I. K.;
7:1:190:5     Synthesis and characterization of spray pyrolyzed nanocrystalline CeO2-SiO2 thin films as passive counter electrodes
DOI:10.1016/j.solmat.2009.12.024  JN:SOLAR ENERGY MATERIALS AND SOLAR CELLS  PY:2010
  TC:6  AU: Bhosale, A. K.;Shinde, P. S.;Tarwal, N. L.;Kadam, P. M.;Mali, S. S.;Patil, P. S.;
7:1:190:6     Thickness limit of BaTiO3 thin film capacitors grown on SUS substrates using aerosol deposition method
DOI:10.1016/j.tsf.2010.03.159  JN:THIN SOLID FILMS  PY:2010
  TC:5  AU: Oh, Jong-Min;Nam, Song-Min;
7:1:190:7     Effects of BNT Addition on the Microstructure and PTC Properties of La-Doped BaTiO3-Based PTCR Ceramics
DOI:10.1080/00150191003748972  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Wei, Jifeng;Pu, Yongping;Mao, Yuqin;Wang, Jinfei;
7:1:191:1:1     In situ monitoring of the effects of hydrogen on Pb(Zr,Ti)O-3 structure
DOI:10.1063/1.3592295  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Shafiei, A.;Oprea, C.;Alfantazi, A.;Troczynski, T.;
7:1:191:1:2     High-pressure hydrogen materials compatibility of piezoelectric films
DOI:10.1063/1.3517445  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Alvine, K. J.;Shutthanandan, V.;Bennett, W. D.;Bonham, C. C.;Skorski, D.;Pitman, S. G.;Dahl, M. E.;Henager, C. H., Jr.;
7:1:191:1:3     Hydrogen diffusion in lead zirconate titanate and barium titanate
DOI:10.1063/1.4748283  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Alvine, K. J.;Vijayakumar, M.;Bowden, M. E.;Schemer-Kohrn, A. L.;Pitman, S. G.;
7:1:191:1:4     Pb nanowire formation on Al/lead zirconate titanate surfaces in high-pressure hydrogen
DOI:10.1063/1.4731721  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Alvine, Kyle J.;Shutthanandan, Vaithiyalingam;Arey, Bruce W.;Wang, Chongmin;Bennett, Wendy D.;Pitman, Stan G.;
7:1:191:1:5     Hydrogen species motion in piezoelectrics: A quasi-elastic neutron scattering study
DOI:10.1063/1.3691114  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Alvine, K. J.;Tyagi, M.;Brown, C. M.;Udovic, T. J.;Jenkins, T.;Pitman, S. G.;
7:1:191:2:1     About the defect structure in differently doped PZT ceramics: A temperature dependent positron lifetime study
DOI:10.1016/j.ceramint.2014.01.127  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Drogowska, K.;Elsayed, M.;Krause-Rehberg, R.;Balogh, A. G.;
7:1:191:2:2     Hydrogen content analysis in hydrogen-charged PZT ferroelectric ceramics
DOI:10.1016/j.ssi.2013.01.009  JN:SOLID STATE IONICS  PY:2013
  TC:1  AU: Drogowska, K.;Flege, S.;Rogalla, D.;Becker, H. -W.;Ionescu, E.;Kim-Ngan, N. -T. H.;Balogh, A. G.;
7:1:191:2:3     Investigation of the Effects of High-Pressure Hydrogen on Pb(Zr,Ti)O-3 (PZT) Ceramics
DOI:10.1111/j.1551-2916.2011.04971.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Shafiei, Ali;Oprea, Carmen;Troczynski, Tom;
7:1:191:3:1     Electromechanical response of multilayer piezoelectric actuators for fuel injectors at high temperatures
DOI:10.1063/1.4875487  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Narita, Fumio;Hasegawa, Ryohei;Shindo, Yasuhide;
7:1:191:3:2     Cryogenic electromechanical behavior of multilayer piezo-actuators for fuel injector applications
DOI:10.1063/1.3656445  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Shindo, Yasuhide;Narita, Fumio;Sasakura, Takayoshi;
7:1:192:1     Fatigue failure characteristics of lead zirconate titanate piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2009.09.014  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Okayasu, Mitsuhiro;Ozeki, Go;Mizuno, Mamoru;
7:1:192:2     Mechanically controlled domain structure in PZT piezoelectric ceramics
DOI:10.1016/j.ceramint.2012.02.036  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Okayasu, Mitsuhiro;Sato, Yuki;Mizuno, Mamoru;Shiraishi, Tetsuro;
7:1:192:3     Harvested power and sensitivity analysis of vibrating shoe-mounted piezoelectric cantilevers
DOI:10.1088/0964-1726/19/11/115011  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:12  AU: Moro, L.;Benasciutti, D.;
7:1:192:4     Material properties of bismuth layered ferroelectrics and lead zirconate titanate piezoelectric ceramics
DOI:10.1016/j.ceramint.2012.10.018  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Okayasu, Mitsuhiro;Sato, Yuki;Takasu, Satoshi;Mizuno, Mamoru;Shiraishi, Tetsuro;
7:1:192:5     Structural and electrical properties of 0.56Pb(Ni1/3Nb2/3)O-3-0.10Pb(Zn1/3Nb2/3)O-3-0.34PbTiO(3) ceramics prepared by different ceramic processings
DOI:10.1016/j.ceramint.2010.09.057  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:3  AU: Fang, Bijun;Du, Qingbo;Wu, Dun;Zhou, Limin;Shan, Yuejin;Tezuka, Keitaro;Imoto, Hideo;
7:1:192:6     Structural and Electrical Properties of 0.69Pb(Mg1/3Nb2/3)O-3-0.31PbTiO(3) Ceramics Prepared by Partial Oxalate Route Via Different Processings
DOI:10.1080/00150193.2013.814023  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Qian, Kun;Fang, Bijun;Du, Qingbo;Ding, Jianning;Zhao, Xiangyong;Luo, Haosu;
7:1:192:7     Aging Behavior and Mechanical Properties of 0.69Pb(Mg1/3Nb2/3)O-3-0.31PbTiO(3) Ceramics
DOI:10.1080/00150193.2014.932577  JN:FERROELECTRICS  PY:2014
  TC:2  AU: Liu, Xing;Fang, Bijun;Chen, Zhihui;Ding, Jianning;Zhao, Xiangyong;Xu, Haiqing;Luo, Haosu;
7:1:192:8     In situ measurement of material properties of lead zirconate titanate piezoelectric ceramics during cyclic mechanical loading
DOI:10.1016/j.jeurceramsoc.2009.11.004  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Okayasu, Mitsuhiro;Sugiyama, Eriko;Mizuno, Mamoru;
7:1:193:1     Phase structure, microstructure and piezoelectric properties of perovskite (K0.5Na0.5)(0.95)Li0.05NbO3-Bi-0.5(K0.15Na0.85)(0.5)TiO3 lead-free ceramics
DOI:10.1016/j.jallcom.2009.11.084  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Chen, Lei;Fan, Huiqing;Zhang, Miaohua;Yang, Chao;Chen, Xiuli;
7:1:193:2     Microstructure and piezoelectric properties of Na0.5K0.5NbO3-BiNiO3-LiSbO3 lead-free ceramics
DOI:10.1016/j.jallcom.2010.04.234  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: Liu, Chaoying;Liu, Xinyu;Jiang, Minhong;Ma, Jiafeng;
7:1:193:3     Electrical and Physical Properties of Modified Potassium Sodium Niobate Ceramics Prepared by Molten Salt Synthesis
DOI:10.1080/00150193.2013.841510  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Kruea-In, Chatchai;Monmakhan, Thanyarat;Rujijanagul, Gobwute;
7:1:193:4     Effect of BiFeO3 additions on the dielectric and piezoelectric properties of (K0.44Na0.52Li0.04)(Nb0.84Ta0.1Sb0.06)O-3 ceramics
DOI:10.1016/j.materresbull.2009.09.014  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:9  AU: Jiang, Minhong;Liu, Xinyu;Liu, Chaoying;
7:1:193:5     Synthesis and Characterization of (K0.5Na0.5)NbO3 Piezoelectric Ceramics Prepared Using K5.70Li4.07Nb10.23O30 as a New Sintering Aid
DOI:10.1080/00150193.2012.707858  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Pang, Xuming;Qiu, Jinhao;Zhu, Kongjun;Zheng, Hongjuan;
7:1:193:6     Effect of Firing Conditions on Phase Formation, Microstructure and Dielectric Properties of KNN-LS-BN Ceramics Fabricated by Combustion Technique
DOI:10.1080/00150193.2013.842852  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Panya, Peerapong;Wattanawikkam, Chakkaphan;Chootin, Suphornphun;Bongkarn, Theerachai;
7:1:193:7     Conditions of Morphotropic Phase Boundary in Perovskite-Oxides
DOI:10.1080/00150193.2012.675269  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Matsushita, Eiko;Sugiyama, Kouichi;
7:1:193:8     Effect of Bi-0.5(Na0.9K0.1)(0.5)TiO3 on Phase Structure and Electrical Properties of (K0.5Na0.5)NbO3 Lead-free Ceramics
DOI:10.1080/00150193.2013.850948  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Huang, Tao;Xiao, Ding-Quan;Liang, Wen-Feng;Wu, Jia-Gang;Zhu, Jian-Guo;
7:1:194:1     Investigations on electrocaloric properties of ferroelectric Pb(Mg0.067Nb0.133Zr0.8)O-3
DOI:10.1063/1.4801868  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:13  AU: Hamad, Mahmoud A.;
7:1:194:2     Detecting giant electrocaloric effect in SrxBa1-xNb2O6 single crystals
DOI:10.1063/1.4718350  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Hamad, Mahmoud Aly;
7:1:194:3     Room temperature giant electrocaloric properties of relaxor ferroelectric 0.93PMN-0.07PT thin film
DOI:10.1063/1.4795156  JN:AIP ADVANCES  PY:2013
  TC:21  AU: Hamad, Mahmoud A.;
7:1:194:4     Calculation of Hysteresis Losses for Ferroelectric Soft Lead Zirconate Titanate Ceramics
DOI:10.1007/s11664-013-2906-3  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Hamad, Mahmoud A.;
7:1:194:5     Magnetocaloric effect in polycrystalline Gd1-xCaxBaCo2O5.5
DOI:10.1016/j.matlet.2012.05.088  JN:MATERIALS LETTERS  PY:2012
  TC:17  AU: Hamad, Mahmoud Aly;
7:1:194:6     Optimal design of nanomagnets for targeted hyperthermia
DOI:10.1016/j.jmmm.2010.11.062  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:6  AU: Mamiya, Hiroaki;Jeyadevan, Balachandran;
7:1:195:1     Preparation of textured K2BiNb5O15 ceramics with rod-like templates by the screen-printing technique
DOI:10.1016/j.jallcom.2011.03.115  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Li, Yali;Hui, Chun;Li, Yongxiang;Wang, Youliang;
7:1:195:2     Nano-sized Ba2NaNb5O15-NaNbO3 co-crystallized glass-ceramics in phosphoniobate system
DOI:10.1063/1.4719034  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Takahashi, Yoshihiro;Fujie, Nobuhiro;Fujiwara, Takumi;
7:1:195:3     Screen Printing to Achieve Highly Textured Bi4Ti3O12
DOI:10.1111/j.1551-2916.2010.03694.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Winter, Michael R.;DiAntonio, Christopher B.;Yang, Pin;Rodriguez, Mark A.;Michael, Joseph R.;Chavez, Tom P.;McKenzie, Bonnie B.;
7:1:195:4     Frequency and Temperature-Independent Electrical Transport Properties of 2BaO-0.5Na(2)O-2.5Nb(2)O(5)-4.5B(2)O(3) Glass-Ceramics
DOI:10.1111/jace.13142  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Kundu, Swarup;Varma, Kalidindi B. R.;
7:1:195:5     Sol-gel synthesis, densification, and electrical properties of CuO-B2O3 doped Ba6-3xR8+2xTi18O54 (R = Nd) microwave dielectric ceramics
DOI:10.1007/s10853-010-5028-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:4  AU: Wu, Yang;Zuo, Ruzhong;Zhou, Yuanyuan;Yue, Zhenxing;
7:1:195:6     Crystallization of tungstenbronze-type Ba2NaNb5O15 in high-Nb2O5-content glass: An inelastic light scattering study
DOI:10.1063/1.3512909  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Takahashi, Yoshihiro;Fujie, Nobuhiro;Osada, Minoru;Masai, Hirokazu;Ihara, Rie;Fujiwara, Takumi;
7:1:195:7     Dielectric properties of (100-x)Li2B4O7-x(Ba5Li2Ti2Nb8O30) glasses and glass nanocrystal composites
DOI:10.1016/j.mseb.2010.02.016  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:2  AU: Ahamad, M. Niyaz;Varma, K. B. R.;
7:1:195:8     Low-Fire Processing of Microwave BNBT-Based High-k Dielectric with Li2O-ZnO-B2O3 Glass
DOI:10.1111/jace.12602  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Shih, Yi-Ting;Jean, Jau-Ho;
7:1:195:9     Influence of Li-B-Si Additions on the Sintering and Microwave Dielectric Properties of Ba-Nd-Ti Ceramics
DOI:10.1007/s11664-013-2731-8  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:5  AU: Li, Enzhu;Duan, Shuxin;Sun, Shumeng;Li, Hao;Mi, Yuean;Zhou, Xiaohua;Zhang, Shuren;
7:1:196:1     Perovskite-Structured BiFeO3-Bi(Zn1/2Ti1/2) O-3-PbTiO3 Solid Solution Piezoelectric Ceramics with Curie Temperature About 700 degrees C
DOI:10.1111/jace.12324  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Hou, Xianbo;Yu, Jian;
7:1:196:2     A Survey on Piezoelectric Ceramics for Generator Applications
DOI:10.1111/j.1551-2916.2010.03702.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:18  AU: Roedig, Thomas;Schoenecker, Andreas;Gerlach, Gerald;
7:1:196:3     Piezoelectric properties of Ca-modified Pb0.6Bi0.4(Ti0.75Zn0.15Fe0.10)O-3 ceramics
DOI:10.1016/j.ceramint.2011.04.085  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: An, Fei-fei;Cao, Fei;Yu, Jian;
7:1:196:4     Electrical Properties of High Curie Point Pb0.6Bi0.4 (Ti0.75Zn0.15Fe0.10)O-3 Ceramics
DOI:10.1111/j.1551-2916.2010.03605.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: An, Feifei;Yu, Jian;
7:1:196:5     Preparation and Electrical Properties of Modified Lead Titanate Ceramics
DOI:10.1080/00150193.2010.485914  JN:FERROELECTRICS  PY:2010
  TC:6  AU: An, Feifei;He, Wenze;Wang, Tingting;Yu, Jian;
7:1:196:6     Effects of Li2CO3 and Sm2O3 additives on low-temperature sintering and piezoelectric properties of PZN-PZT ceramics
DOI:10.1016/j.jeurceramsoc.2013.07.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:6  AU: Fan, G. F.;Shi, M. B.;Lu, W. Z.;Wang, Y. Q.;Liang, Fei;
7:1:197:1     Isothermal formation kinetics of nanocrystals in LiNb0.5Ta0.5O3 glass
DOI:10.1016/j.jallcom.2014.07.005  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Baek, C. G.;Choi, H. W.;Yang, Y. S.;
7:1:197:2     Structure, dielectric and optical properties of Nd3+-doped LiTaO3 transparent ferroelectric glass-ceramic nanocomposites
DOI:10.1016/j.jallcom.2009.09.071  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: Tarafder, Anal;Annapurna, Kalyandurg;Chaliha, Reenamoni Saikia;Tiwari, Vidya Sagar;Gupta, Pradeep Kumar;Karmakar, Basudeb;
7:1:197:3     On the study of zinc doping in congruent LiTaO3 crystals
DOI:10.1016/j.matchemphys.2012.01.099  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:4  AU: Wu, J. C.;Chen, Z. B.;Choubey, R. K.;Lan, C. W.;
7:1:197:4     Influence of chemical reduction on optical and electrical properties of LiTaO3 crystal
DOI:10.1016/j.jallcom.2010.03.091  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Yan, Tao;Liu, Hong;Wang, Jiyang;Zheng, Feifei;Yao, Shuhua;Xia, Zongren;Wu, Jianbo;Boughton, Robert I.;
7:1:197:5     Morphology of potassium sodium niobate based silicate glass system
DOI:10.1007/s13391-013-6020-8  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:0  AU: Yongsiri, Ploypailin;Eitssayeam, Sukum;Sirisoonthorn, Somnuk;Pengpat, Kamonpan;
7:1:197:6     Fabrication of Ferroelectric Glass Ceramics from (K0.5Na0.5)NbO3-SiO2-Al2O3 Glass System
DOI:10.1080/00150193.2011.577990  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Yongsiri, Ploypailin;Eitssayeam, Sukum;Inthata, Uraiwan;Rujijanagul, Gobwute;Sirisoonthorn, Somnuk;Tunkasiri, Tawee;Pengpat, Kamonpan;
7:1:197:7     Growth and property of Zn-doped near-stoichiometric LiTaO3 crystal
DOI:10.1016/j.jcrysgro.2010.03.003  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:2  AU: Zheng, Wei;Wang, Dongpeng;Xu, Yuheng;
7:1:197:8     Growth and photorefractive properties of Mg, Fe co-doped near-stoichiometric lithium tantalate single crystals
DOI:10.1016/j.optmat.2010.02.033  JN:OPTICAL MATERIALS  PY:2010
  TC:5  AU: Hsu, W. T.;Chen, Z. B.;You, C. A.;Huang, S. W.;Liu, J. P.;Lan, C. W.;
7:1:198:1     Double hysteresis loop induced by defect dipoles in ferroelectric Pb(Zr0.8Ti0.2)O-3 thin films
DOI:10.1063/1.3549116  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Pu, Yunti;Zhu, Jiliang;Zhu, Xiaohong;Luo, Yuansheng;Wang, Mingsong;Li, Xuhai;Liu, Jing;Zhu, Jianguo;Xiao, Dingquan;
7:1:198:2     Effects of space charge distribution on ferroelectric hysteresis loops considering the inhomogeneous built-in electric field: A phase field simulation
DOI:10.1063/1.4767702  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Wang, X. L.;Li, B.;Zhong, X. L.;Zhang, Y.;Wang, J. B.;Zhou, Y. C.;
7:1:198:3     Impedance spectroscopy analysis of Bi0.85Pr0.15Fe0.9Co0.1O3 thin films
DOI:10.1016/j.materresbull.2013.11.054  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Lin, Ying;Yang, Haibo;Liu, Miao;Zhang, Ge;
7:1:198:4     Ferroelectric properties of Pb(Zr,Ti)O-3 films under ion-beam induced strain
DOI:10.1063/1.4766413  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Lee, Jung-Kun;Nastasi, Michael;
7:1:198:5     Soft and hybrid-doped Pb(Zr,Ti)O(3) ceramics under stress, electric field, and temperature loading
DOI:10.1063/1.3585826  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Suchanicz, J.;Kim-Ngan, N-T;Konieczny, K.;Jankowska-Sumara, I.;Balogh, A. G.;
7:1:199:1     Correlation between enhanced lattice polarizability and high piezoelectric response in BiScO3-PbTiO3
DOI:10.1103/PhysRevB.87.064106  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Lalitha, K. V.;Fitch, Andy N.;Ranjan, Rajeev;
7:1:199:2     The microstructure and ferroelectricity of BiScO3-PbTiO3 nanoceramics at morphotropic phase boundaries
DOI:10.1016/j.scriptamat.2014.03.019  JN:SCRIPTA MATERIALIA  PY:2014
  TC:0  AU: Zhang, Shaopeng;Wang, Xiaohui;Zhu, Jinlong;Jin, Changqing;Gong, Huiling;Li, Longtu;
7:1:199:3     Structural investigations of the bismuth scandate-lead titanate xBiScO3-(1-x) PbTiO3 solid solution for 0.10 <= x <= 0.40
DOI:10.1103/PhysRevB.82.144108  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Datta, K.;Walker, D.;Thomas, P. A.;
7:1:199:4     Raman Spectra and Phase Transition in (1-x) BiScO3-xPbTiO(3) Nanopowders
DOI:10.1080/00150193.2013.838463  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Zhang, Shaopeng;Wang, Xiaohui;Li, Longtu;
7:1:199:5     Nucleation-Growth Mode of Cubic-Tetragonal Transition with Coexistence of Phases over a Wide Temperature Interval in the High Temperature Ferroelectric Systems PbTiO3-BiMeO3:Me = Sc , and Zn1/2Ti1/2
DOI:10.1111/j.1551-2916.2012.05250.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Lalitha, K., V;Das, Shamiparna;Kalyani, Ajay Kumar;Garg, Rohini;Ranjan, Rajeev;
7:1:199:6     Structural Characterization and Dielectric Properties of Sol-Gel Synthesized BiScO3-0.64PbTiO3 Ceramics
DOI:10.1080/00150191003708935  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Shahzad, Khurram;Li, Lihua;Li, Zhenrong;Shabbir, Ghulam;Li, Hui;Yao, Xi;
7:1:199:7     Processing and Characterization of Lead Zirconate Titanate Nanopowders by a Simple Water-Based Sol-Gel Method
DOI:10.1111/j.1551-2916.2012.05428.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Zhang, Shaopeng;Wang, Xiaohui;Li, Longtu;
7:1:199:8     Neutron and X-Ray Diffraction Crystal Structure Rietveld Analysis of PbTiO3 Ceramics
DOI:10.1080/00150193.2011.577332  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Shahzad, K.;Khan, M. Nasir;Shabbir, G.;Bashir, J.;
7:1:200:1     Phase Transition Near the Morphotropic Phase Boundary in Pb(Zn1/3Nb2/3)O3-PbTiO3
DOI:10.1080/00150193.2010.482886  JN:FERROELECTRICS  PY:2010
  TC:8  AU: Iwata, Makoto;Sakakibara, Kohei;Aoyagi, Rintaro;Maeda, Masaki;Ishibashi, Yoshihiro;
7:1:200:2     Temperature-Field Phase Diagrams in Pb(Mg1/3Nb2/3)O-3-29.5%PbTiO3
DOI:10.1080/00150193.2014.890500  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Iwata, M.;Yokoi, R.;Sugiyama, Y.;Maeda, M.;Tachi, Y.;Ishibashi, Y.;
7:1:200:3     Large acoustic thermal hysteresis in relaxor ferroelectric Pb(Zn1/3Nb2/3)O-3-PbTiO3
DOI:10.1063/1.4821624  JN:APL MATERIALS  PY:2013
  TC:3  AU: Tsukada, Shinya;Kim, Tae Hyun;Kojima, Seiji;
7:1:200:4     Temperature-field phase diagrams in Pb(Zn1/3Nb2/3)O-3-4.5%PbTiO3 II
DOI:10.1016/j.ceramint.2012.10.038  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Iwata, Makoto;Iijima, Naoya;Maeda, Masaki;Ishibashi, Yoshihiro;
7:1:200:5     Temperature-Field Phase Diagrams in Pb(Zn1/3Nb2/3)O-3-4.5% PbTiO3
DOI:10.1080/00150193.2012.675251  JN:FERROELECTRICS  PY:2012
  TC:7  AU: Iwata, Makoto;Iijima, Naoya;Ishibashi, Yoshihiro;
7:1:200:6     Detailed Investigation of Temperature-Field Phase Diagrams in Pb(Zn1/3Nb2/3)O-3-9%PbTiO3
DOI:10.1080/00150193.2012.747413  JN:FERROELECTRICS  PY:2012
  TC:6  AU: Iwata, M.;Tanaka, K.;Maeda, M.;Ishibashi, Y.;
7:1:200:7     The Critical End Point in Pb(Zn1/3Nb2/3)O-3-8%PbTiO3
DOI:10.1080/00150193.2011.577363  JN:FERROELECTRICS  PY:2011
  TC:5  AU: Iwata, Makoto;Kato, Sadaharu;Ishibashi, Yoshihiro;
7:1:200:8     Dielectric Behavior of 95.5% Pb(Zn1/3Nb2/3)O-3-4.5% PbTiO3 Single Crystals under DC Bias from 12-550 K
DOI:10.1080/00150193.2014.922823  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Ang, Chen;Yu, Zhi;
7:1:201:1:1     Temperature behavior of electrical properties of high-k lead-magnesium-niobium titanate thin-films
DOI:10.1016/j.tsf.2011.12.037  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Chen, Wenbin;McCarthy, Kevin G.;Copuroglu, Mehmet;O'Brien, Shane;Winfield, Richard;Mathewson, Alan;
7:1:201:1:2     Effect of processing options on ultra-low-loss lead-magnesium-niobium titanate thin films for high density capacitors
DOI:10.1016/j.tsf.2012.12.092  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Chen, Wenbin;McCarthy, Kevin G.;O'Brien, Shane;Copuroglu, Mehmet;Cai, Miao;Winfield, Richard;Mathewson, Alan;
7:1:201:1:3     UV-/thermal processing of sol-gel-derived lead-magnesium-niobium titanate thin films
DOI:10.1016/j.tsf.2009.12.017  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Copuroglu, Mehmet;O'Brien, Shane;Malic, Barbara;Kuznik, Brigita;Kosec, Marija;Zhu, Xiaohong;Defay, Emmanuel;Winfield, Richard;
7:1:201:1:4     Effect of nanoparticles on ferroelectric and electrical properties of novel PMNT thin-films
DOI:10.1016/j.tsf.2010.12.194  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Chen, W.;McCarthy, K. G.;Copuroglu, M.;Doyle, H.;Malic, B.;Kuznik, B.;Kosec, M.;O'Brien, S.;Winfield, R.;Mathewson, A.;
7:1:201:1:5     Unraveling dielectric and electrical properties of ultralow-loss lead magnesium niobate titanate pyrochlore dielectric thin films for capacitive applications
DOI:10.1063/1.3428390  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Zhu, X. H.;Defay, E.;Suhm, A.;Fribourg-Blanc, E.;Aid, M.;Zhu, J. L.;Xiao, D. Q.;Zhu, J. G.;
7:1:201:2:1     Ferroelectric and dielectric properties of La0.6Sr0.4CoO3-buffered 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) thin film by pulsed laser deposition
DOI:10.1016/j.jallcom.2013.11.043  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Yao, Qirong;Wang, Feifei;Leung, Chung Ming;Tang, Yanxue;Wang, Tao;Jin, Chengchao;Shi, Wangzhou;
7:1:201:2:2     Low-Temperature Processing of High-Performance 0.74Pb(Mg1/3Nb2/3)O-3-0.26PbTiO(3) Thin Films on La0.6Sr0.4CoO3-Buffered Si Substrates for Pyroelectric Arrays Applications
DOI:10.1111/j.1551-2916.2011.04976.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Tang, Yanxue;Zhou, Dan;Tian, Yue;Li, Xia;Wang, Feifei;Sun, Dazhi;Shi, Wangzhou;Tian, Li;Sun, Jinglan;Meng, Xiangjian;Chu, Junhao;
7:1:201:3:1     Distribution of pyrochlore phase in Pb(Mg1/3Nb2/3)O-3-PbTiO3 films and suppression with a Pb(Zr0.52Ti0.48)O-3 interfacial layer
DOI:10.1016/j.tsf.2012.07.112  JN:THIN SOLID FILMS  PY:2012
  TC:8  AU: Yang, Sun A.;Cho, Sam Yeon;Lim, Jong Sun;Bu, Sang Don;
7:1:201:3:2     Gamma-ray irradiation effects on electrical properties of ferroelectric PbTiO3 and Pb(Zr0.52Ti0.48)O-3 thin films
DOI:10.1016/j.tsf.2014.04.038  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Yang, Sun A.;Kim, Byung Hoon;Lee, Min Ku;Lee, Gyoung Ja;Lee, Nam-Ho;Bu, Sang Don;
7:1:202:1     A Preisach-based hysteresis model for magnetic and ferroelectric hysteresis
DOI:10.1007/s00339-010-5884-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:23  AU: Sutor, Alexander;Rupitsch, Stefan J.;Lerch, Reinhard;
7:1:202:2     An efficient vector Preisach hysteresis model based on a novel rotational operator
DOI:10.1063/1.3672069  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Sutor, Alexander;Kallwies, Jan;Lerch, Reinhard;
7:1:202:3     A neural model of hysteresis in amorphous materials and piezoelectric materials
DOI:10.1007/s00339-014-8528-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Ma, Lianwei;Shen, Yu;
7:1:202:4     Sound Generation Using a Magnetostrictive Microactuator
DOI:10.1063/1.3554200  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Albach, Thorsten S.;Horn, Peter;Sutor, Alexander;Lerch, Reinhard;
7:1:202:5     A modified Preisach hysteresis operator for the modeling of temperature dependent magnetic material behavior
DOI:10.1063/1.3562520  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Sutor, Alexander;Rupitsch, Stefan J.;Bi, Shasha;Lerch, Reinhard;
7:1:202:6     The room-temperature ferromagnetism of defect-rich ZnMgO semiconductor thin films
DOI:10.1007/s00339-012-6986-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:1  AU: Fang, Q. Q.;Wang, W. N.;Li, J. G.;Ding, Q. Q.;Wang, C.;Huang, W. J.;Zhang, H. M.;Zhang, Q. P.;
7:1:202:7     Validation of the rotational vector Preisach model with measurements and simulations of vectorial minor loops
DOI:10.1007/s00339-013-7806-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Sutor, Alexander;Bi, Shasha;Lerch, Reinhard;
7:1:202:8     Vector hysteresis modeling using octal clusters of coupled step functions
DOI:10.1063/1.3563071  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Adly, A. A.;Abd-El-Hafiz, S. K.;
7:1:203:1     Effect of electrode and substrate on the fatigue behavior of PZT thick films fabricated by aerosol deposition
DOI:10.1016/j.ceramint.2011.04.092  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Han, Guifang;Ryu, Jungho;Yoon, Woon-Ha;Choi, Jong-Jin;Hahn, Byung-Dong;Kim, Jong-Woo;Park, Dong-Soo;
7:1:203:2     Structural, dielectric, ferroelectric and optical properties of PBCT, PBST and PCST complex thin films on LaNiO3 metallic conductive oxide layer coated Si substrates by the CSD technique
DOI:10.1016/j.jallcom.2014.04.132  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Pontes, D. S. L.;Chiquito, A. J.;Pontes, F. M.;Longo, E.;
7:1:203:3     Enhancement of ferroelectric and piezoelectric properties in PZT thin films with heterolayered structure
DOI:10.1016/j.matchemphys.2012.12.074  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:5  AU: Nguyen, Minh D.;Nguyen, Chi T. Q.;Trinh, Thong Q.;Tai Nguyen;Pham, Thao N.;Rijnders, Guus;Vu, Hung N.;
7:1:203:4     Reliability of Ferroelectric Multilayer PZT Thick Films Fabricated by Aerosol Deposition
DOI:10.1080/00150193.2014.923253  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kambale, Rahul C.;Han, Guifang;Yoon, Woon-Ha;Kim, Jong-Woo;Choi, Jong-Jin;Hahn, Byung-Dong;Park, Dong-Soo;Ahn, Cheol-Woo;Ryu, Jungho;
7:1:203:5     Effect of Film Thickness on the Piezoelectric Properties of Lead Zirconate Titanate Thick Films Fabricated by Aerosol Deposition
DOI:10.1111/j.1551-2916.2010.04276.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Han, Guifang;Ryu, Jungho;Yoon, Woon-Ha;Choi, Jong-Jin;Hahn, Byung-Dong;Park, Dong-Soo;
7:1:203:6     Process dependence of the piezoelectric response of membrane actuators based on Pb(Zr0.45Ti0.55)O-3 thin films
DOI:10.1016/j.tsf.2014.01.007  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Nguyen, C. T. Q.;Nguyen, M. D.;Dekkers, M.;Houwman, E.;Vu, H. N.;Rijnders, G.;
7:1:203:7     Experimental investigation on the effect of top electrode diameter in PZT thick films
DOI:10.1016/j.matlet.2011.04.088  JN:MATERIALS LETTERS  PY:2011
  TC:8  AU: Han, Guifang;Ryu, Jungho;Yoon, Woon-Ha;Choi, Jong-Jin;Hahn, Byung-Dong;Kim, Jong-Woo;Park, Dong-Soo;Priya, Shashank;
7:1:203:8     Structural and electrical properties of Pb(Zr0.53Ti0.47)O-3 films prepared on La0.5Sr0.5CoO3 coated Si substrates
DOI:10.1016/j.jeurceramsoc.2009.05.007  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Chen, Feng;Cheng, Jinrong;Yu, Shenwen;Meng, Zhongyan;
7:1:204:1     In situ observation of correlations between domain switching and crack propagation in BaTiO3 single crystals under coupling of mechanical and electric loads
DOI:10.1016/j.scriptamat.2013.09.015  JN:SCRIPTA MATERIALIA  PY:2014
  TC:1  AU: Jiang, Bing;Bai, Yang;Li, Meicheng;Mwenya, Trevor;
7:1:204:2     In situ observation of electric field induced crack propagation in BaTiO3 crystals along the field direction
DOI:10.1016/j.scriptamat.2012.06.020  JN:SCRIPTA MATERIALIA  PY:2012
  TC:8  AU: Li, Y. W.;Li, F. X.;
7:1:204:3     Effect of switching stresses on domain evolution during quasi-static crack growth in a ferroelastic single crystal
DOI:10.1016/j.actamat.2009.12.044  JN:ACTA MATERIALIA  PY:2010
  TC:5  AU: Neumeister, Peter;Kessler, Hannes;Balke, Herbert;
7:1:204:4     In situ mechanical compression of polycrystalline BaTiO3 in the ESEM
DOI:10.1016/j.jeurceramsoc.2014.03.015  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Reichmann, A.;Mitsche, S.;Zankel, A.;Poelt, P.;Reichmann, K.;
7:1:204:5     Direct observation of domain switching and crack nucleation in a piezoelectric material
DOI:10.1016/j.ceramint.2011.03.012  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:5  AU: Leach, C.;Ali, N. K.;Hall, D. A.;
7:1:204:6     Direct observation of ferroelectric domain formation by environmental scanning electron microscopy
DOI:10.1016/j.jeurceramsoc.2011.05.043  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Reichmann, A.;Zankel, A.;Reingruber, H.;Poelt, P.;Reichmann, K.;
7:1:204:7     Surface Potential Distribution in an Indentation- Pre-Cracked BaTiO3 Single Crystal
DOI:10.1111/j.1551-2916.2011.04634.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Sun, X.;Su, Y. J.;Gao, K. W.;Guo, L. Q.;Qiao, L. J.;Chu, W. Y.;Zhang, Tong-Yi;
7:1:204:8     Charge accumulation in grain boundary promotes intergranular fracture of lead zirconate titanate piezoceramics under mechanical and electric load
DOI:10.1016/j.scriptamat.2011.11.015  JN:SCRIPTA MATERIALIA  PY:2012
  TC:2  AU: Sun, X.;Su, Y. J.;Gao, K. W.;Guo, L. Q.;Qiao, L. J.;
7:1:205:1     Effects of annealing atmosphere on the structural and electrical properties of (Na0.5K0.5)NbO3 thin films grown by RF magnetron sputtering
DOI:10.1016/j.actamat.2012.02.015  JN:ACTA MATERIALIA  PY:2012
  TC:10  AU: Kim, Bo-Yun;Seong, Tae-Geun;Seo, In-Tae;Jang, Min-Soo;Nahm, Sahn;Kang, Jong-Yun;Yoon, Seok-Jin;
7:1:205:2     Electrical Properties of a 0.95(Na0.5K0.5) NbO3-0.05CaTiO(3) Thin Film Grown on a Pt/Ti/SiO2/Si Substrate
DOI:10.1111/jace.13050  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Lee, Youn-Seon;Seo, In-Tae;Kim, Bo-Yun;Nahm, Sahn;Kang, Chong-Yun;Jeong, Young-Hun;Paik, Jong-Hoo;
7:1:205:3     Growth Behavior and Electrical Properties of a (Na0.5K0.5) NbO3 Thin Film Deposited on a Pt/Ti/SiO2/Si Substrate Using RF Magnetron Sputtering
DOI:10.1111/j.1551-2916.2011.04574.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Kang, Lee-Seung;Kim, Bo-Yun;Seo, In-Tae;Seong, Tae-Geun;Kim, Jin-Seong;Sun, Jong-Woo;Paik, Dong-Soo;Hwang, Inrok;Park, Bae Ho;Nahm, Sahn;
7:1:205:4     Effects of oxygen pressure on electrical properties of (Na0.5K0.5)NbO3 films grown on Pt/Ti/SiO2/Si substrates
DOI:10.1016/j.actamat.2012.09.010  JN:ACTA MATERIALIA  PY:2012
  TC:3  AU: Kim, Bo-Yun;Seong, Tae-Geun;Seo, In-Tae;Kim, Jin-Seong;Kang, Chong-Yun;Yoon, Seok-Jin;Nahm, Sahn;
7:1:205:5     Lead-free (Na-0.5,K-0.5)NbO3 thin films for the implantable piezoelectric medical sensor applications
DOI:10.1016/j.matlet.2012.05.079  JN:MATERIALS LETTERS  PY:2012
  TC:3  AU: Kwak, Jiyeon;Kingon, Angus I.;Kim, Seung-Hyun;
7:1:205:6     Effects of CaTiO3 addition on microstructures and electrical properties of Na0.52K0.48NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.ceramint.2012.10.047  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Chen, Cheng-Sao;Chou, Chen-Chia;Lin, Yung-Shun;Chen, Pin-Yi;Chen, Haydn;
7:1:206:1     Unipolar and bipolar fatigue in antiferroelectric lead zirconate thin films and evidences for switching-induced charge injection inducing fatigue
DOI:10.1063/1.3358138  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Lou, X. J.;Wang, J.;
7:1:206:2     Strong electron emission from antiferroelectric PLZT(2/95/5) films
DOI:10.1063/1.4881885  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Yaseen, Muhammad;Lou, Xiaojie;Chen, Xiaofeng;Ren, Wei;Liu, Yang;Feng, Yujun;Shi, Peng;Wu, Xiaoqing;
7:1:206:3     Rayleigh-like nonlinear dielectric response and its evolution during electrical fatigue in antiferroelectric (Pb,La)(Zr,Ti)O-3 thin film
DOI:10.1063/1.4870992  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Luo, Zhengdong;Lou, Xiaojie;Zhang, Fuping;Liu, Yang;Chang, Dingding;Liu, Chenqi;Liu, Qida;Dkhil, Brahim;Zhang, Ming;Ren, Xiaobing;He, Hongliang;
7:1:206:4     Effect of annealing temperature on ferroelectric electron emission of sol-gel PZT films
DOI:10.1016/j.ceramint.2012.10.116  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Yaseen, Muhammad;Chen, Xiaofeng;Ren, Wei;Feng, Yujun;Shi, Peng;Wu, Xiaoqing;Zhu, Weiguang;
7:1:206:5     Effect of SrTiO3 Buffer Layers on Crystallization and Properties of Sol-Gel Derived Pb(Zr0.52Ti0.48)O3 Thin Films
DOI:10.1080/00150193.2010.484664  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Xin, Hong;Ren, Wei;Wu, Xiaoqing;Shi, Peng;Zhu, Wanlin;Zhang, Xiaohua;
7:1:206:6     Ultra-low voltage ferroelectric electron emission from lead zirconate titanate thin films with nanostructured top electrodes
DOI:10.1063/1.3603049  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Becherer, J.;Mieth, O.;Vidyarthi, V. S.;Gerlach, G.;Eng, L. M.;
7:1:206:7     Effect of high-field relative permittivity on the electron emission field of PNZST cathode induced by nanosecond pulsed electric field
DOI:10.1016/j.ceramint.2014.03.121  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Liu, Yang;Lou, Xiaojie;Xu, Zhuo;He, Hongliang;Feng, Yujun;
7:1:206:8     Time-resolved properties of ferroelectric electron emission from [Pb(Mg1/3Nb2/3)O-3](0.71)[PbTiO3](0.29) single crystals
DOI:10.1063/1.4739487  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Becherer, J.;Mieth, O.;Eng, L. M.;
7:1:207:1     High Quality Mn-Doped (Na,K)NbO3 Nanofibers for Flexible Piezoelectric Nanogenerators
DOI:10.1021/am502234q  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:10  AU: Kang, Han Byul;Chang, Jiyoung;Koh, Kisik;Lin, Liwei;Cho, Yong Soo;
7:1:207:2     Structural phase transitions and electrical properties of (KxNa1-x)NbO3-based ceramics modified with Mn
DOI:10.1016/j.jeurceramsoc.2012.07.033  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Mgbemere, Henry E.;Hinterstein, Manuel;Schneider, Gerold A.;
7:1:207:3     Biocompatible ferroelectric (Na,K)NbO3 nanofibers
DOI:10.1063/1.3673282  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Jalalian, A.;Grishin, A. M.;
7:1:207:4     Piezoelectricity and electrostriction in biocompatible (Na,K)NbO3 nanofiber scaffolds
DOI:10.1063/1.4884117  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Jalalian, A.;Grishin, A. M.;
7:1:208:1     Effect of Zr4+ Content on the Grain Growth, Dielectric Relaxation Behavior, and Ferroelectric Properties of Ba0.4Sr0.6Ti1-x Zr (x) O-3 Nano-Ceramics Prepared by Different Methods Assisted by Fast Microwave Sintering
DOI:10.1007/s11664-014-3107-4  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Sun Zixiong;Pu Yongping;Liu Yuwen;
7:1:208:2     Dielectric properties of Ba1-xSrxTiO3 ceramics prepared by microwave sintering
DOI:10.1016/j.ceramint.2012.10.089  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Yu, Yang;Wang, Xusheng;Yao, Xi;
7:1:208:3     Effect of Zr4+ content on the T-C range and dielectric and ferroelectric properties of BaZrxTi1-xO3 ceramics prepared by microwave sintering
DOI:10.1016/j.ceramint.2013.09.069  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Sun, Zixiong;Pu, Yongping;Dong, Zijing;Hu, Yao;Liu, Xiaoyan;Wang, Peikui;
7:1:208:4     Phase formation and microstructure of BaxSr1-xTiO3 ceramics prepared by direct current arc discharge plasma process
DOI:10.1016/j.matlet.2014.03.019  JN:MATERIALS LETTERS  PY:2014
  TC:4  AU: Li, Shuangbin;Yao, Ying;Jia, Yongzhong;Cui, Zhenhua;
7:1:208:5     Influence of addition of copper cadmium ferrite on the dielectric and electrical behavior of BaSrTiO3 ceramics
DOI:10.1016/j.ceramint.2012.04.048  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Verma, Kavita;Sharma, Seema;
7:1:208:6     Investigations of BaxSr1-xTiO3 ceramics and powders prepared by direct current arc discharge technique
DOI:10.1063/1.4894456  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Shuangbin;Yao, Ying;Yuzyuk, Yu. I.;Jia, Yongzhong;Wang, Xiaohan;Xie, Shaolei;Jing, Yan;
7:1:208:7     Investigation of Structural and Magnetic Properties of Cu1-xCdxFe2O4 Ceramic System
DOI:10.1080/10584587.2010.490695  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:1  AU: Verma, Kavita;Rai, Radeshyam;Sharma, Seema;
7:1:209:1     Structural and electrical properties of BZT-added BNLT ceramics
DOI:10.1016/j.ceramint.2013.08.089  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Kantha, P.;Pisitpipathsin, N.;Pengpat, K.;Eitssayeam, S.;Pojprapai, S.;
7:1:209:2     Influence of calcium substitution on structural and electrical properties of substituted barium titanate
DOI:10.1016/j.ceramint.2011.01.022  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:7  AU: Kumar, Parveen;Singh, Sangeeta;Juneja, J. K.;Prakash, Chandra;Raina, K. K.;
7:1:209:3     Influence of Ca substitution on microstructure and electrical properties of Ba(Zr,Ti)O-3 ceramics
DOI:10.1016/j.ceramint.2012.10.031  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Pisitpipathsin, Nuttapon;Kantha, Puripat;Pengpat, Kamonpan;Rujijanagul, Gobwute;
7:1:209:4     Microstructure and dielectric properties of Dy/Mn doped BaTiO3 ceramics
DOI:10.1016/j.ceramint.2013.08.092  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:8  AU: Paunovic, V.;Mitic, V. V.;Prijic, Z.;Zivkovic, Lj.;
7:1:209:5     The contribution of fractal nature to BaTiO3-ceramics microstructure analysis
DOI:10.1016/j.ceramint.2011.09.003  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Mitic, V. V.;Paunovic, V.;Purenovic, J.;Jankovic, S.;Kocic, Lj;Antolovic, I.;Rancic, D.;
7:1:209:6     Microstructure and Dielectric Properties of Rare-Earth Doped BaTiO3 Ceramics
DOI:10.1080/00150193.2014.923229  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Mitic, V. V.;Paunovic, V.;Pavlovic, V.;
7:1:210:1     Microstructure and electrical properties of Mn/Y codoped Ba0.67Sr0.33TiO3 ceramics
DOI:10.1016/j.ceramint.2011.11.049  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:10  AU: Yan, Dongxu;Xu, Zunping;Chen, Xiaolong;Xiao, Dingquan;Yu, Ping;Zhu, Jianguo;
7:1:210:2     Fabrication and influence of sintering temperature on material properties of Mn/Y codoped Ba0.67Sr0.33TiO3 ceramics via using citrate-nitrate combustion derived powder
DOI:10.1016/j.jallcom.2013.02.081  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Yan, Dongxu;Xu, Zunping;Chen, Xiaolong;Xiao, Dingquan;Lai, Xinchun;Zhu, Jianguo;
7:1:210:3     Pyroelectric properties of arrayed BaTiO3 system thick film for uncooled IR detector
DOI:10.1016/j.materresbull.2009.12.029  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:6  AU: Noh, Hyun-Ji;Lee, Sung-Gap;Nam, Sung-Pill;Lee, Young-Hie;
7:1:210:4     Effects of sintering temperature on the properties of donor-acceptor codoped Ba0.67Sr0.33TiO3 ceramics for pyroelectric infrared detector applications
DOI:10.1016/j.ceramint.2013.08.139  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Xu, Zunping;Qiang, Hua;Chen, Yi;Nie, Chaoyin;
7:1:210:5     The Effects of Buffers on the Microstructure and Electrical Properties of Mn/Y Co-Doped Ba0.67Sr0.33TiO3 Thin Films
DOI:10.1080/10584587.2012.741504  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Chen, X. Y.;Yang, C. L.;Zhang, X. S.;Li, J.;Liu, H.;Xiao, D. Q.;Yu, P.;
7:1:210:6     Effect of Annealing Temperature on the Properties of Ba0.67Sr0.33TiO3: Mn+Y Thin Films
DOI:10.1080/00150193.2013.821009  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Xu, Zunping;Chen, Xiaoyang;Zhu, Jianguo;Xiao, Dingquan;Yu, Ping;
7:1:210:7     Enhancement of Properties of Mn/Y Co-doped Ba0.67Sr0.33TiO3 Films on Oxide Electrode by Inserting a SrTiO3 Buffer Layer
DOI:10.1080/00150193.2013.850973  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Xu, Zunping;Chen, Xiaoyang;Xiao, Dingquan;Yu, Ping;Zhu, Jianguo;
7:1:210:8     The Fabrication of Highly (100)-Oriented Ba0.8Sr0.2TiO3/LaNiO3 Multilayers via Sol-Gel Method
DOI:10.1080/00150193.2010.484358  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Yang, Jun;Yu, Ping;Xiao, Ding-Quan;Tang, Chang;Chen, Min;
7:1:211:1     Tailoring non-linear dielectric properties by local field engineering in anisotropic porous ferroelectric structures
DOI:10.1063/1.4729878  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Padurariu, Leontin;Curecheriu, Lavinia;Galassi, Carmen;Mitoseriu, Liliana;
7:1:211:2     Tunable gold-chitosan nanocomposites by local field engineering
DOI:10.1063/1.4809673  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Cazacu, Ana;Curecheriu, Lavinia;Neagu, Alexandra;Padurariu, Leontin;Cernescu, Adrian;Lisiecki, Isabelle;Mitoseriu, Liliana;
7:1:211:3     Low field permittivity of ferroelectric-ferrite ceramic composites: Experiment and modeling
DOI:10.1063/1.4764037  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Ciomaga, Cristina Elena;Olariu, Cristina Stefania;Padurariu, Leontin;Sandu, Andrei Victor;Galassi, Carmen;Mitoseriu, Liliana;
7:1:211:4     Experimental and analytical modeling of resonant permittivity and permeability in ferroelectric-ferrite composites in microwave range
DOI:10.1063/1.4730785  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Ciomaga, Cristina E.;Balmus, Sorin B.;Dumitru, Ioan;Mitoseriu, Liliana;
7:1:211:5     Magnetodielectric effect in trilayered Co65Fe35B20/PVDF/Co65Fe35B20 composite materials. Prediction and measurement for tunable microwave applications
DOI:10.1063/1.3359437  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Rasoanoavy, F.;Laur, V.;De Blasi, S.;Lezaca, J.;Queffelec, P.;Garello, K.;Viala, B.;
7:1:212:1     Low temperature synthesis of tetragonal BaTiO3 by a novel composite-hydroxide-mediated approach and its dielectric properties
DOI:10.1016/j.jeurceramsoc.2009.08.026  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:14  AU: Xie, Yahong;Yin, Shu;Hashimoto, Takatoshi;Tokano, Yuichi;Sasaki, Atsushi;Sato, Tsugio;
7:1:212:2     Study the Raman Spectra and Dielectric Properties of Hexagonal BaTi1-xGaxO3 Ceramics
DOI:10.1080/00150193.2012.740269  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Lei, Chien-Ming;
7:1:212:3     Enhanced microwave-assisted sintering of X7R ceramic dielectrics for use in multilayer capacitors
DOI:10.1016/j.ceramint.2010.05.003  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:4  AU: McInroy, A. B.;Rowley, A. T.;Freer, R.;
7:1:212:4     Synthesis and piezoelectric properties of Li-doped BaTiO3 by a solvothemial approach
DOI:10.1016/j.jeurceramsoc.2012.11.007  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Kimura, Takeshi;Dong, Qiang;Yin, Shu;Hashimoto, Takatoshi;Sasaki, Atsushi;Sato, Tsugio;
7:1:212:5     Doping behaviors of NiO and Nb2O5 in BaTiO3 and dielectric properties of BaTiO3-based X7R ceramics
DOI:10.1016/j.ceramint.2011.10.020  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Li, Lingxia;Fu, Ruixue;Liao, Qingwei;Ji, Lujie;
7:1:212:6     Synthesis of submicron BaTiO3 particles by modified solid-state reaction method
DOI:10.1016/j.jallcom.2010.01.096  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Chang, Che-Yuan;Huang, Chi-Yuen;Wu, Yu-Chun;Su, Che-Yi;Huang, Cheng-Liang;
7:1:212:7     Low-temperature synthesis of SrZrO3 nanocubes by the composite-hydroxide-mediated approach
DOI:10.1016/j.jcrysgro.2013.04.022  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:4  AU: Nakashima, Kouichi;Fujii, Ichiro;Wada, Satoshi;
7:1:213:1     Photoluminescence properties and synthesis of a PZT mesostructure obtained by the microwave-assisted hydrothermal method
DOI:10.1016/j.jallcom.2011.09.036  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Teixeira, G. F.;Zaghete, M. A.;Gasparotto, G.;Costa, M. G. S.;Espinosa, J. W. M.;Longo, E.;Varela, J. A.;
7:1:213:2     Electrical and ferroelectric properties of undoped and La-doped PZT (52/48) electroceramics synthesized by sol-gel method
DOI:10.1016/j.jallcom.2012.09.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:9  AU: Prabu, M.;Banu, I. B. Shameem;Gobalakrishnan, S.;Chavali, Murthy;
7:1:213:3     Interrelationship between phase transition characteristics and piezoelectric response in lead lanthanum zirconate titanate relaxor ceramics
DOI:10.1007/s10853-012-6461-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:5  AU: Guerra, J. D. S.;Garcia, J. E.;Ochoa, D. A.;Pelaiz-Barranco, A.;Garcia-Zaldivar, O.;Calderon-Pinar, F.;
7:1:213:4     Preparation of ultrathin PZT films by a chemical solution deposition method from a polymeric citrate precursor
DOI:10.1016/j.jeurceramsoc.2009.07.023  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Vojisavljevic, Katarina;Brankovic, Goran;Sreckovic, Tatjana;Recnik, Aleksander;Brankovic, Zorica;
7:1:213:5     Vacuum-ultraviolet ellipsometry spectra and structural properties of Pb(Zr,Ti)O-3 films
DOI:10.1016/j.tsf.2010.11.076  JN:THIN SOLID FILMS  PY:2011
  TC:5  AU: Suchaneck, G.;Chvostova, D.;Kousal, J.;Zelezny, V.;Lynnyk, A.;Jastrabik, L.;Gerlach, G.;Dejneka, A.;
7:1:213:6     Structural, dielectric and ferroelectric properties of PLZFNT ceramics
DOI:10.1016/j.jallcom.2014.02.102  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Kumar, Parveen;Singh, Pratibha;Juneja, J. K.;Raina, K. K.;Pant, R. P.;Prakash, Chandra;Singh, Sangeeta;
7:1:213:7     Optical and structural properties of low thickness lead zirconate titanate films on sapphire substrates prepared via sol-gel method
DOI:10.1116/1.4746405  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2012
  TC:1  AU: Garoli, Denis;Natali, Marco;Rigato, Valentino;Romanato, Filippo;
7:1:214:1     Ultrafast pump-probe measurements of short small-polaron lifetimes in the mixed-valence perovskite Cs2Au2I6 under high pressures
DOI:10.1103/PhysRevB.85.081102  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Trigo, M.;Chen, J.;Jiang, M. P.;Mao, W. L.;Riggs, S. C.;Shapiro, M. C.;Fisher, I. R.;Reis, D. A.;
7:1:214:2     Pressure-induced symmetry breaking in tetragonal CsAuI3
DOI:10.1103/PhysRevB.87.054104  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Wang, Shibing;Hirai, Shigeto;Shapiro, Max C.;Riggs, Scott C.;Geballe, Ted H.;Mao, Wendy L.;Fisher, Ian R.;
7:1:214:3     Bandgap closure and reopening in CsAuI3 at high pressure
DOI:10.1103/PhysRevB.89.245109  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wang, Shibing;Kemper, Alexander F.;Baldini, Maria;Shapiro, M. C.;Riggs, Scott C.;Zhao, Zhao;Liu, Zhenxian;Devereaux, Thomas P.;Geballe, Ted H.;Fisher, Ian R.;Mao, Wendy L.;
7:1:214:4     Polymorphism in BaPb1-xBixO3 at the superconducting composition
DOI:10.1103/PhysRevB.83.174512  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Climent-Pascual, E.;Ni, N.;Jia, S.;Huang, Q.;Cava, R. J.;
7:1:214:5     Single crystal growth by self-flux method of the mixed valence gold halides Cs-2[(AuX2)-X-I][(AuX4)-X-III] (X=Br,I)
DOI:10.1016/j.jcrysgro.2012.06.039  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:2  AU: Riggs, Scott C.;Shapiro, M. C.;Corredor, F.;Geballe, T. H.;Fisher, I. R.;McCandless, Gregory T.;Chan, Julia Y.;
7:1:214:6     Synthesis and Properties of Charge-Ordered Thallium Halide Perovskites, CsTl0.5+Tl0.53+X3 (X = F or Cl): Theoretical Precursors for Superconductivity?
DOI:10.1021/cm402423x  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:2  AU: Retuerto, M.;Emge, T.;Hadermann, J.;Stephens, P. W.;Li, M. R.;Yin, Z. P.;Croft, M.;Ignatov, A.;Zhang, S. J.;Yuan, Z.;Jin, C.;Simonson, J. W.;Aronson, M. C.;Pan, A.;Basov, D. N.;Kotliar, G.;Greenblatt, M.;
7:1:215:1     Enhanced Pyroelectric and Piezoelectric Figure of Merit of Porous Bi-0.5(Na0.82K0.18)(0.5)TiO3 Lead-Free Ferroelectric Thick Films
DOI:10.1111/j.1551-2916.2010.03651.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Zhang, Haibo;Jiang, Shenglin;Kajiyoshi, Koji;
7:1:215:2     Phase, microstructure and conductivity of electron-doped Ba1-xLaxPbO3 ceramics
DOI:10.1016/j.ceramint.2014.03.074  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Zhang, Ji;Hu, Bin;Xu, Jie;Gu, Zheng-Bin;Zhang, Shan-Tao;
7:1:215:3     Stress analysis and ferroelectric properties of Pb(Zr0.52Ti0.48)(0.96)Nb0.04O3 thin film grown on different thickness of BaPbO3 electrodes
DOI:10.1063/1.3518516  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Wen, Xin-Yi;Yu, Jun;Wang, Yun-Bo;Zhou, Wen-Li;Gao, Jun-Xiong;
7:1:215:4     Enhanced performance of Pb0.8La0.1Ca0.1Ti0.975O3/Pb(Nb0.01Zr0.2Ti0.8)O-3 multilayer thin films for pyroelectric applications
DOI:10.1063/1.3600336  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Chi, Q. G.;Wang, X.;Li, W. L.;Fei, W. D.;Lei, Q. Q.;
7:1:215:5     Fatigue characteristic and pyroelectric properties of highly (111)-oriented Nb doped Pb(Zr-0.2,Ti-0.8)O-3 thin films with Pb0.8La0.1Ca0.1Ti0.975O3 seed layer prepared by a sol-gel route
DOI:10.1016/j.jallcom.2010.11.109  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Chi, Q. G.;Li, W. L.;Wang, X.;Fei, W. D.;Lei, Q. Q.;
7:1:215:6     Thickness dependence of structure and piezoelectric properties at nanoscale of polycrystalline lead zirconate titanate thin films
DOI:10.1063/1.4801961  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Araujo, E. B.;Lima, E. C.;Bdikin, I. K.;Kholkin, A. L.;
7:1:215:7     Microstructural and electrical characterization of bulk YBa2Cu3O7-delta ceramics
DOI:10.1016/j.ceramint.2011.05.133  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Suasmoro, S.;Khalfi, M. F.;Khalfi, A.;Trolliard, G.;Smith, D. S.;Bonnet, J. P.;
7:1:216:1     Fabrication of Sodium Potassium Niobate Ceramics by Two Step Sintering Assisted Molten Salts Synthesis
DOI:10.1080/00150193.2013.846171  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Lartcumfu, Narumon;Kruea-In, Chatchai;Tawichai, Nattaya;Rujijanagul, Gobwute;
7:1:216:2     The Effect of Ta Doping on the Phase Transitions and the Piezoelectric and Ferroelectric Properties of K0.35Na0.65NbO3
DOI:10.1080/00150193.2012.676971  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Schiemer, Jason;Liu, Yun;Carpenter, Michael;Withers, Ray;
7:1:216:3     Preparation and Properties of La and K Co-Doped BaTiO3 Lead-Free Piezoelectric Ceramics
DOI:10.1080/00150193.2012.707862  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Wu, Dun;Fang, Bijun;Du, Qingbo;Ding, Jianning;
7:1:216:4     Electrical properties of lanthanum doped barium titanate ceramics
DOI:10.1016/j.matchar.2011.07.013  JN:MATERIALS CHARACTERIZATION  PY:2011
  TC:14  AU: Petrovic, M. M. Vijatovic;Bobic, J. D.;Ramoska, T.;Banys, J.;Stojanovic, B. D.;
7:1:216:5     Effects of the Second Component on the Structure and Electrical Properties of Na1/2K1/2NbO3-Based Lead-Free Piezoelectric Ceramics
DOI:10.1080/00150193.2011.542718  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Jiang, Na;Fang, Bijun;Du, Qingbo;Zhou, Limin;
7:1:216:6     Morphotropic Phase Boundary of Sodium-Potassium Niobate Lead-Free Piezoelectric Ceramics
DOI:10.1111/j.1551-2916.2010.04143.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Pang, Xuming;Qiu, Jinhao;Zhu, Kongjun;
7:1:216:7     Effect of Al and Mg Doping on Dielectric Properties of BaTiO3 Synthesized by Solution Combustion Technique
DOI:10.1080/00150193.2013.846717  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Jongprateep, Oratai;Khongnakhon, Tunchanoke;
7:1:217:1     A New Material for High-Temperature Lead-Free Actuators
DOI:10.1002/adfm.201300899  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:4  AU: Kursumovic, Ahmed;Defay, Emmanuel;Lee, Oon Jew;Tsai, Chen-Fong;Bi, Zhenxing;Wang, Haiyan;MacManus-Driscoll, Judith L.;
7:1:217:2     Fabrication and Properties of High Curie Temperature xBiZn(1/2)Ti(1/2)O(3)-(1-x) PbTiO3 Piezoelectric Films by a Sol-Gel Process
DOI:10.1111/j.1551-2916.2011.05024.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Zhong, Caifu;Guo, Limin;Wang, Xiaohui;Li, Longtu;
7:1:217:3     Effects of morphology and strain on the dielectric response of multiferroic CoFe2O4-BaTiO3 nanocomposite thin films
DOI:10.1063/1.3462449  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Fina, I.;Dix, N.;Fabrega, L.;Sanchez, F.;Fontcuberta, J.;
7:1:217:4     Response to "Comment on 'On the strain coupling across vertical interfaces of switchable BiFeO3-CoFe2O4 multiferroic nanostructures' " [Appl. Phys. Lett. 96, 076101 (2010)]
DOI:10.1063/1.3298746  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:1  AU: Dix, N.;Muralidharan, R.;Guyonnet, J.;Warot-Fonrose, B.;Varela, M.;Paruch, P.;Sanchez, F.;Fontcuberta, J.;
7:1:217:5     Effect of PbO Seeding Layers on the Structure and Properties of the Sol-Gel-Derived BiScO3-PbTiO3 Thin Films
DOI:10.1111/j.1551-2916.2010.04180.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Zhong, Caifu;Wang, Xiaohui;Wu, Yunyi;Li, Longtu;
7:1:217:6     Investigation of Thickness Dependence of Structure and Electric Properties of Sol-Gel-Derived BiScO3-PbTiO3 Thin Films
DOI:10.1111/j.1551-2916.2010.03850.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Zhong, Caifu;Wang, Xiaohui;Fang, Jian;Li, Longtu;
7:1:217:7     Comment on "On the strain coupling across vertical interfaces of switchable BiFeO3-CoFe2O4 multiferroic nanostructures" [Appl. Phys. Lett. 95, 062907 (2009)]
DOI:10.1063/1.3298745  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Zhang, X. D.;Park, Sungmin;Park, Gwangseo;
7:1:218:1     Preparation and positive temperature coefficient of resistivity behavior of Ba0.95Ca0.05TiO3-BiYO3-Na0.5Bi0.5TiO3 ceramics
DOI:10.1016/j.powtec.2011.12.053  JN:POWDER TECHNOLOGY  PY:2012
  TC:4  AU: Pu, Yongping;Wu, Haidong;Wei, Jifeng;Xu, Ning;
7:1:218:2     An Ultra-Broad Working Temperature Dielectric Material of BaTiO3-Based Ceramics with Nd2O3 Addition
DOI:10.1111/j.1551-2916.2012.05245.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Li, Lingxia;Guo, Dong;Xia, Wangsuo;Liao, Qingwei;Han, Yemei;Peng, Yin;
7:1:218:3     Relaxation dynamics of the conductive processes in BaTiO3 ceramics at high temperature
DOI:10.1016/j.mseb.2010.03.085  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:4  AU: Leyet, Y.;Guerrero, F.;de la Cruz, J. Perez;
7:1:218:4     Effect of Na0.5Bi0.5TiO3 on dielectric properties of BaTiO3 based ceramics
DOI:10.1016/j.ceramint.2011.04.045  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:9  AU: Sun, Yue;Liu, Hanxing;Hao, Hua;Zhang, Shujun;Guo, Liling;Yu, Zhiyong;
7:1:218:5     Solid state metathesis synthesis of BaTiO3, PbTiO3, K0.5Bi0.5TiO3 and Na0.5Bi0.5TiO3
DOI:10.1016/j.ceramint.2009.12.026  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:3  AU: Velchuri, Radha;Kumar, B. Vijaya;Devi, V. Rama;Prasad, G.;Vithal, M.;
7:1:219:1     Tunable three-dimensional diamond photonic crystal made of a liquid medium
DOI:10.1063/1.4802757  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:11  AU: Han, Haoxue;Li, Dichen;
7:1:219:2     High electrostrictive coefficient Q(33) in lead-free Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 piezoelectric ceramics
DOI:10.1063/1.4904019  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Fei;Jin, Li;Guo, Runping;
7:1:219:3     Temperature dependence of strain-polarization coupling in ferroelectric ceramics
DOI:10.1063/1.3367734  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Weaver, P. M.;Cain, M. G.;Stewart, M.;
7:1:220:1     Crystal plane evolution of grain oriented alumina ceramics with high transparency
DOI:10.1016/j.ceramint.2012.03.074  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Yi, Hailan;Mao, Xiaojian;Zhou, Guohong;Chen, Shi;Zou, Xiaoqing;Wang, Shiwei;Shimai, Shunzo;
7:1:220:2     Topotactic preparation of textured alumina ceramics from dehydroxylation of gibbsite films
DOI:10.1016/j.matchemphys.2014.07.009  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Louaer, Seif-Eddine;Wang, Yao;Guo, Lin;
7:1:220:3     Magnetic field oriented tetragonal zirconia with anisotropic toughness
DOI:10.1016/j.jeurceramsoc.2011.02.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Zhang, Li;Vleugels, Jef;Darchuk, Larysa;Van der Biest, Omer;
7:1:220:4     Slip Casting of Alumina Suspensions in a Strong Magnetic Field
DOI:10.1111/j.1551-2916.2010.03861.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Zhang, Li;Vleugels, Jef;Van der Biest, Omer;
7:1:220:5     Texturing of 3Y-TZP zirconia by electrophoretic deposition in a high magnetic field of 17.4 T
DOI:10.1016/j.jeurceramsoc.2014.04.045  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Vriami, Despoina;Beaugnon, Eric;Vanmeensel, Kim;Vleugels, Jozef;Van der Biest, Omer;
7:1:221:1     Investigation of broad spectrum absorption of Lead zirconate titanate grating
DOI:10.1016/j.jallcom.2014.08.039  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Ma Zhi-Chao;Xu Zhi-Mou;Wu Xing-Hui;Luo Chun-Ya;Peng Jing;
7:1:221:2     Cascading metallic gratings for broadband absorption enhancement in ultrathin plasmonic solar cells
DOI:10.1063/1.4871584  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Wen, Long;Sun, Fuhe;Chen, Qin;
7:1:221:3     Characteristics of electrical power generation from lead zirconate titanatepiezoelectric ceramics under cyclic loading
DOI:10.1016/j.ceramint.2013.11.114  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Okayasu, Mitsuhiro;Mizuno, Mamoru;Shiraishi, Tetsuro;
7:1:221:4     Power generation characteristics of PZT piezoelectric ceramics using drop weight impact techniques: Effect of dimensional size
DOI:10.1016/j.ceramint.2013.06.007  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Chure, Ming-Cheng;Wu, Long;Wu, King-Kung;Tung, Chia-Cheng;Lin, Jui-Sheng;Ma, Wu-Chung;
7:1:221:5     A study of the effects of vibration on the electric power generation properties of lead zirconate titanate piezoelectric ceramic
DOI:10.1016/j.ceramint.2012.02.018  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Okayasu, Mitsuhiro;Sato, Daisuke;Sato, Yuki;Konno, Masashi;Shiraishi, Tetsuro;
7:1:222:1     The structural and in-plane dielectric/ferroelectric properties of the epitaxial (Ba, Sr)(Zr, Ti)O-3 thin films
DOI:10.1063/1.4883963  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chan, N. Y.;Wang, D. Y.;Wang, Y.;Dai, J. Y.;Chan, H. L. W.;
7:1:222:2     Preparation and characterizations of Ba(Zr,Ti)O-3/(Ba,Sr)TiO3 heterostructures grown on (LaAlO3)(0.3)(Sr2AlTaO6)(0.35) single crystal substrates by pulsed laser deposition
DOI:10.1016/j.tsf.2010.03.088  JN:THIN SOLID FILMS  PY:2010
  TC:5  AU: Chan, N. Y.;Gao, G. Y.;Wang, Y.;Chan, H. L. W.;
7:1:222:3     Barium Strontium Zirconate Titanate (Ba,Sr)(Zr,Ti)O-3 Thin Films for Tunable Microwave Applications
DOI:10.1080/00150193.2011.594714  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Chan, N. Y.;Wang, Y.;Chan, H. L. W.;
7:1:222:4     Microstructure and Nano-mechanical Properties of Mn-doped (Ba,Sr)TiO3//Ba(Zr,Ti)O-3 Layered Films on MgO
DOI:10.1080/00150193.2014.922838  JN:FERROELECTRICS  PY:2014
  TC:0  AU: He, J.;Jiang, J. C.;Meletis, E. I.;Liu, M.;Collins, G.;Ma, C. R.;Chen, C. L.;Bhalla, A.;
7:1:222:5     Refining of Nanopillars Induced by Mn-doping in Epitaxial Ba(Zr,Ti)O-3 Thin Films
DOI:10.1080/10584587.2011.621054  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: He, J.;Jiang, J. C.;Meletis, E. I.;Liu, M.;Collins, G.;Ma, C. R.;Chen, C. L.;Bhalla, A.;
7:1:223:1     Microstructure and dielectric properties of BST ceramics derived from high-energy ball-milling
DOI:10.1016/j.jallcom.2013.09.031  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Liu, Cheng;Liu, Peng;
7:1:223:2     The effect of Mn addition on phase development, microstructure and microwave dielectric properties of ZrTi2O6-ZnNb2O6 ceramics
DOI:10.1016/j.matlet.2012.04.093  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Yu, Shengquan;Tang, Bin;Zhang, Shuren;Zhou, Xiaohua;
7:1:223:3     Phase evolution, Raman spectroscopy and microwave dielectric behavior of (Li1/4Nb3/4) doped ZrO2-TiO2 system
DOI:10.1007/s00339-010-5838-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:3  AU: Pang, Li-Xia;Wang, Hong;Zhou, Di;Chen, Yue-Hua;Yao, Xi;
7:1:223:4     The effect of transition metal oxides on the tunablility and microwave dielectric properties of Ba0.5Sr0.5TiO3-BaWO4 composite ceramics
DOI:10.1016/j.matchemphys.2011.03.043  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:3  AU: Zhang, Mingwei;Zhai, Jiwei;Shen, Bo;Yao, Xi;
7:1:223:5     Tunable and microwave dielectric properties of Ba0.5Sr0.5TiO3-BaWO4 composite ceramics doped with Co2O3
DOI:10.1016/j.materresbull.2010.08.004  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:2  AU: Zhang, Mingwei;Zhai, Jiwei;Yao, Xi;
7:1:223:6     Effects of manganese nitrate concentration on the performance of an aluminum substrate beta-PbO2-MnO2-WC-ZrO2 composite electrode material
DOI:10.1016/j.ijhydene.2013.12.091  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2014
  TC:1  AU: Yang, Haitao;Chen, Buming;Liu, Huanrong;Guo, Zhongcheng;Zhang, Yongchun;Li, Xuelong;Xu, Ruidong;
7:1:223:7     Structural and microwave dielectric behavior of (Li1/4Nb3/4) substituted ZrxSnyTizO4 (x plus y plus z=2) system
DOI:10.1016/j.matchemphys.2010.10.005  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:1  AU: Pang, Li-Xia;Zhou, Di;Chen, Yue-Hua;Wang, Hong;
7:1:224:1     Anomalous Curie temperature behavior of A-site Gd-doped BaTiO3 ceramics: The influence of strain
DOI:10.1063/1.3563710  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Ben, Liubin;Sinclair, Derek C.;
7:1:224:2     Phase transition and piezoelectric, ferromagnetic response of B-site (Co, Nb) modified BaTiO3 ceramics
DOI:10.1016/j.ceramint.2013.06.079  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Zhou, Min;Zhang, Jingji;Ji, Ludong;Wang, Yidan;Wang, Jiangying;Yu, Faxin;
7:1:224:3     Relaxor behavior and dielectric relaxation in Pb(Ba1/3Nb2/3)O-3: A phase pure new relaxor material
DOI:10.1063/1.3528219  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Bajpai, P. K.;Pastor, Mukul;Singh, K. N.;
7:1:224:4     Comment on "Relaxor behavior and dielectric relaxation in Pb(Ba1/3Nb2/3)O-3: A phase pure new relaxor material" [J. Appl. Phys. 109, 014114 (2011)]
DOI:10.1063/1.3594694  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Macutkevic, J.;Banys, J.;
7:1:224:5     Diffuse Phase Transition and Electrical Conductivity of Pb(Ca1/3Nb2/3)O-3
DOI:10.1007/s11664-014-2979-7  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Bajpai, P. K.;Pastor, Mukul;Singh, K. N.;
7:1:225:1     Low voltage extrinsic switching of ferroelectric delta-PVDF ultra-thin films
DOI:10.1063/1.4818626  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Li, Mengyuan;Katsouras, Ilias;Asadi, Kamal;Blom, Paul W. M.;de Leeuw, Dago M.;
7:1:225:2     Transition of the polarization switching from extrinsic to intrinsic in the ultrathin polyvinylidene fluoride homopolymer films
DOI:10.1063/1.4875907  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Wang, J. L.;Liu, B. L.;Zhao, X. L.;Tian, B. B.;Zou, Y. H.;Sun, S.;Shen, H.;Sun, J. L.;Meng, X. J.;Chu, J. H.;
7:1:225:3     Transition from relaxor to ferroelectric-like phase in poly(vinylideneflouride-trifluoroethylene-chloroflouroethylene) terpolymer ultrathin films
DOI:10.1063/1.3551732  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Wang, J. L.;Yuan, S. Z.;Tian, L.;Meng, X. J.;Sun, J. L.;Chu, J. H.;
7:1:225:4     Pressure-induced changes in the dielectric response of polymer relaxors
DOI:10.1063/1.3681372  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Hilczer, B.;Szafranski, M.;Hilczer, A.;
7:1:225:5     Controlling the microstructure of poly(vinylidene-fluoride) (PVDF) thin films for microelectronics
DOI:10.1039/c3tc31774a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:6  AU: Li, Mengyuan;Katsouras, Ilias;Piliego, Claudia;Glasser, Gunnar;Lieberwirth, Ingo;Blom, Paul W. M.;de Leeuw, Dago M.;
7:1:225:6     The Intrinsic Coercive Field for P(VDF-TrFE) Thin-Films with Different Thicknesses
DOI:10.1080/10584587.2012.673985  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Liu, X. B.;Jiang, A. Q.;Tang, T. A.;
7:1:226:1     Enhanced dielectric properties of lead barium zirconate thin films by manganese doping
DOI:10.1016/j.apsusc.2010.02.089  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:4  AU: Hao, Xihong;Zhai, Jiwei;Zhou, Jing;Li, Xiaowei;Song, Xiwen;An, Shengli;
7:1:226:2     Structure and dielectric performance of K-doped (Pb0.5Ba0.5)ZrO3 thin films
DOI:10.1016/j.materresbull.2010.12.005  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:0  AU: Hao, Xihong;Zhai, Jiwei;Yue, Zhenxing;Zhou, Jing;Song, Xiwen;Yang, Jichun;An, Shengli;
7:1:226:3     Effects of aging time of sol on the microstructure and electrical properties of (Pb0.5Ba0.5)ZrO3 thin films
DOI:10.1016/j.jallcom.2011.12.007  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Hao, Xihong;Wang, Peng;An, Shengli;Xu, Jingbao;Yue, Zhenxing;
7:1:226:4     Structure and dielectric tunability of (Pb0.5Ba0.5)ZrO3 thin films derived on (Sr0.95La0.05)TiO3 buffer-layered substrates
DOI:10.1016/j.jcrysgro.2009.12.008  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:3  AU: Hao, Xihong;Zhai, Jiwei;Zhou, Jing;Yang, Jichun;Song, Xiwen;An, Shengli;
7:1:226:5     Fabrication and Tunable Dielectric Properties of Magnesium-Doped Lead Barium Zirconate Thin Films
DOI:10.1111/j.1551-2916.2009.03487.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Hao, Xihong;Zhai, Jiwei;Ren, Huiping;Song, Xiwen;Yang, Jichun;
7:1:227:1     Vaporization and Poor Wettability as the Main Challenges in Fabrication of TiB2-Cu Cermets Studied by SPS
DOI:10.3390/met4040623  JN:METALS  PY:2014
  TC:0  AU: Ziemnicka-Sylwester, Marta;
7:1:227:2     Consolidation of mechanically alloyed nanocrystalline Cu-Nb-ZrO2 powder by spark plasma sintering
DOI:10.1016/j.jallcom.2012.04.102  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Eymann, K.;Riedl, T.;Bram, A.;Ruhnow, M.;Boucher, R.;Kirchner, A.;Kieback, B.;
7:1:227:3     Densification kinetics, phase assemblage and hardness of spark plasma sintered Cu-10 wt% TiB2 and Cu-10 wt% TiB2-10 wt% Pb composites
DOI:10.1557/jmr.2013.119  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:2  AU: Sharma, Amit S.;Mishra, Nisha;Biswas, Krishanu;Basu, Bikramjit;
7:1:227:4     Fretting wear study of Cu-10 wt% TiB2 and Cu-10 wt% TiB2-10 wt% Pb composites
DOI:10.1016/j.wear.2013.07.009  JN:WEAR  PY:2013
  TC:2  AU: Sharma, Amit S.;Mishra, Nisha;Biswas, Krishanu;Basu, Bikramjit;
7:1:227:5     Effects of in situ formation of TiB2 particles on age hardening behavior of Cu-1 wt% Ti-1 wt% TiB2
DOI:10.1016/j.msea.2013.03.063  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2013
  TC:9  AU: Sobhani, Mohsen;Mirhabibi, Alireza;Arabi, Hossein;Brydson, R. M. D.;
7:1:227:6     Microstructure-hardness-fretting wear resistance correlation in ultrafine grained Cu-TiB2-Pb composites
DOI:10.1016/j.wear.2014.07.014  JN:WEAR  PY:2014
  TC:1  AU: Sharma, Amit Siddharth;Biswas, Krishanu;Basu, Bikramjit;
7:1:227:7     Synthesis and properties of a Cu-Ti-TiB2 composite hardened by multiple mechanisms
DOI:10.1016/j.msea.2011.07.061  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2011
  TC:6  AU: Bozic, D.;Stasic, J.;Ruzic, J.;Vilotijevic, M.;Rajkovic, V.;
7:1:228:1     Elastic and Anelastic Properties of Ferroelectric (SrTiO3)-O-18 in the kHz-MHz Regime
DOI:10.1103/PhysRevLett.106.105502  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:10  AU: Scott, J. F.;Bryson, J.;Carpenter, M. A.;Herrero-Albillos, J.;Itoh, M.;
7:1:228:2     Light Scattering by Microscopic Granular Ferroelectric Regions in (SrTiO3)-O-18 and Quantum Paraelectrics
DOI:10.1080/00150193.2012.744259  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Nakano, T.;Ushio, N.;Yamamoto, S.;Sakai, Y.;Abe, K.;
7:1:228:3     Symmetry of ferroelectric phase of (SrTiO3)-O-18 determined by ab initio calculations
DOI:10.1103/PhysRevB.83.064102  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Bartkowiak, M.;Kearley, G. J.;Yethiraj, M.;Mulders, A. M.;
7:1:228:4     Soft-phonon mode observation in Li2Ge4O9 phase above room temperature
DOI:10.1063/1.3688603  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Takahashi, Yoshihiro;Kunitomo, Jun;Nakamura, Kensaku;Osada, Minoru;Fujiwara, Takumi;
7:1:228:5     Formation of Grained Ferroelectric Domains in (SrTiO3)-O-18 Studied by Rayleigh - Mie Scattering
DOI:10.1080/00150193.2011.577673  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Nakano, Tsuguhito;Yamamoto, Shutaro;Noma, Takuji;Tachibana, Yoichiro;Katsumata, Yuki;Abe, Kohji;
7:1:228:6     Successive phase transformation in stoichiometric glassy Li2Ge4O9: Isothermal and nonisothermal study
DOI:10.1063/1.4813783  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Takahashi, Yoshihiro;Kunitomo, Jun;Miyazaki, Takamichi;Osada, Minoru;Fujiwara, Takumi;
7:1:228:7     Why P in (SrTiO3)-O-18 is Not Parallel to [100](c) as Expected from the Slater Type Soft Mode?: Role of Rhombohedral Polar Clusters
DOI:10.1080/00150193.2011.577668  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Shigenari, Takeshi;Nakano, Tsuguhito;Abe, Kohji;
7:1:229:1     Cationic ordering, relaxation dynamics and polaron hopping in a new double perovskite oxide: BaPrCoTaO6
DOI:10.1016/j.jallcom.2014.08.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Bharti, Chandrahas;Das, Mrinmoy K.;Sen, A.;Chanda, Sadhan;Sinha, T. P.;
7:1:229:2     Impedance spectroscopy analysis of double perovskite Ho2NiTiO6
DOI:10.1007/s10853-010-4771-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:9  AU: Mahato, Dev K.;Dutta, A.;Sinha, T. P.;
7:1:229:3     Synthesis, structure and dielectric properties of a rare earth double perovskite oxide Ba2CeTaO6
DOI:10.1016/j.materresbull.2011.05.007  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:4  AU: Bharti, Chandrahas;Sinha, T. P.;
7:1:229:4     Complex impedance analysis on a layered perovskite-like ceramic: La3Ti2TaO11
DOI:10.1007/s10853-011-6185-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Li, Chunchun;Wei, Xiaoyong;
7:1:229:5     Synthesis, Structural and Magnetic Studies of the Double Perovskites Ba2CeMO6 (M = Ta, Nb)
DOI:10.1021/cm301278a  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:5  AU: Zhou, Qingdi;Blanchard, Peter;Kennedy, Brendan J.;Reynolds, Emily;Zhang, Zhaoming;Miiller, Wojciech;Aitken, Jade B.;Avdeev, Maxim;Jang, Ling-Yun;Kimpton, Justin A.;
7:1:229:6     Electrical properties and scaling behaviour of rare earth based Ho2CoZrO6 double perovskite ceramics
DOI:10.1016/j.materresbull.2012.09.028  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:2  AU: Mahato, Dev K.;Dutta, Alo;Sinha, T. P.;
7:1:230:1     Enhanced Temperature Stability of (1-aEuro parts per thousand x)(K0.5Na0.5)(0.94)Li0.06NbO3-x(Bi0.5Na0.5)TiO3 Lead-Free Piezoelectric Ceramics
DOI:10.1007/s11664-009-1030-x  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2010
  TC:11  AU: Hao, J. G.;Xu, Z. J.;Chu, R. Q.;Zhang, Y. J.;Chen, Q.;Li, W.;Fu, P.;Zang, G. Z.;Li, G. R.;Yin, Q. R.;
7:1:230:2     Microstructure, Phase Transition, and Electrical Properties of KxNa1-xNbO3 Lead-Free Piezoceramics
DOI:10.1007/s11664-011-1819-2  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:6  AU: Li, Y. M.;Shen, Z. Y.;Jiang, L.;Liao, R. H.;Wang, Z. M.;Hong, Y.;
7:1:230:3     Temperature Stability of V2O5-Doped KNN-LS-BF Lead-Free Piezoelectric Ceramics
DOI:10.1007/s11664-013-2624-x  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:1  AU: Wang, Hua;Zhai, Xia;Xu, Ji-Wen;Yuan, Chang-Lai;Yang, Ling;
7:1:230:4     Effects of BiAlO3 on structure and electrical properties of K0.5Na0.5NbO3-LiSbO3 lead-free piezoceramics
DOI:10.1016/j.mseb.2011.09.002  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:5  AU: Liu, Yong;Chu, Ruiqing;Xu, Zhijun;Zhang, Yanjie;Chen, Qian;Li, Guorong;
7:1:230:5     Enhancing Piezoelectric Performance of CaBi2Nb2O9 Ceramics Through Microstructure Control
DOI:10.1007/s11664-012-2051-4  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:1  AU: Chen, Huanbei;Zhai, Jiwei;
7:1:231:1     Ferroelectricity in NaNbO3: Revisited
DOI:10.1080/00150191003670408  JN:FERROELECTRICS  PY:2010
  TC:6  AU: Arioka, Takahiro;Taniguchi, Hiroki;Itoh, Mitsuru;Oka, Kunihiko;Wang, Ruiping;Fu, Desheng;
7:1:231:2     Local atomic structure of KxNa(1-x)NbO3 by total x-ray diffraction
DOI:10.1063/1.4903512  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Gupta, Shashaank;Petkov, Valeri;Priya, Shashank;
7:1:231:3     Phase Analysis of Na1-xLixNbO3 Ceramics by Neutron and Its Electric Property
DOI:10.1080/00150193.2014.948792  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Joo, H. W.;Chae, K. -W.;Cheon, C. I.;Kim, J. S.;Kim, S. J.;Choi, Y. N.;
7:1:231:4     Diffuse phase transition and electrical properties of lead-free piezoelectric (LixNa1-x)NbO3 (0.04 <= x <= 0.20) ceramics near morphotropic phase boundary
DOI:10.1063/1.4817815  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Mitra, S.;Kulkarni, A. R.;Prakash, Om;
7:1:231:5     Stress-induced phase transition and its reversal by low-temperature annealing in Li-doped sodium niobate
DOI:10.1016/j.matlet.2013.12.002  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Joo, H. W.;Chae, K. -W.;Cheon, C. I.;Kim, J. S.;
7:1:232:1     Behavior of oxygen vacancies in single-crystal SrTiO3: Equilibrium distribution and diffusion kinetics
DOI:10.1103/PhysRevB.85.174109  JN:PHYSICAL REVIEW B  PY:2012
  TC:14  AU: De Souza, Roger A.;Metlenko, Veronika;Park, Daesung;Weirich, Thomas E.;
7:1:232:2     Electron paramagnetic resonance studies of manganese centers in SrTiO3: Non-Kramers Mn3+ ions and spin-spin coupled Mn4+ dimers
DOI:10.1063/1.4723653  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Azamat, D. V.;Dejneka, A.;Lancok, J.;Trepakov, V. A.;Jastrabik, L.;Badalyan, A. G.;
7:1:232:3     Electron paramagnetic resonance probed oxygen deficiency in SrTiO3 with different cap layers
DOI:10.1063/1.4769786  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Chen, Y. S.;Guo, H. Y.;Yang, Jan Chi;Chu, Y. H.;Wu, W. F.;Lin, J. G.;
7:1:232:4     Pulse-electron paramagnetic resonance of Cr3+ centers in SrTiO3
DOI:10.1063/1.4804062  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Azamat, D. V.;Dejneka, A.;Lancok, J.;Trepakov, V. A.;Jastrabik, L.;Badalyan, A. G.;
7:1:233:1     First principles study of the responses to equibiaxial in-plane tensile stresses in tetragonal BaTiO3
DOI:10.1016/j.jallcom.2010.08.005  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Duan, Yifeng;Tang, Gang;Qin, Lixia;Shi, Liwei;
7:1:233:2     Structural characterisation of BaTiO3 thin films deposited on SrRuO3/YSZ buffered silicon substrates and silicon microcantilevers
DOI:10.1063/1.4863542  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Colder, H.;Domenges, B.;Jorel, C.;Marie, P.;Boisserie, M.;Guillon, S.;Nicu, L.;Galdi, A.;Mechin, L.;
7:1:233:3     Molecular beam epitaxy growth of BaTiO3 thin films and crucial impact of oxygen content conditions on the electrical characteristics
DOI:10.1016/j.tsf.2011.10.182  JN:THIN SOLID FILMS  PY:2012
  TC:7  AU: Niu, G.;Gautier, B.;Yin, S.;Saint-Girons, G.;Lecoeur, P.;Pillard, V.;Hollinger, G.;Vilquin, B.;
7:1:234:1:1     Advanced piezoelectric crystal Ca3TaGa3Si2O14: growth, crystal structure perfection, and acoustic properties
DOI:10.1007/s00339-013-7790-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:3  AU: Roshchupkin, Dmitry;Ortega, Luc;Plotitcyna, Olga;Erko, Alexei;Zizak, Ivo;Irzhak, Dmitry;Fahrtdinov, Rashid;Buzanov, Oleg;
7:1:234:1:2     The solid-solution region for the langasite-type Ca3TaGa3Si2O14 crystal as determined by a lever rule
DOI:10.1016/j.jcrysgro.2014.12.042  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Zhao, Hengyu;Uda, Satoshi;Maeda, Kensaku;Nozawa, Jun;Koizumi, Haruhiko;Fujiwara, Kozo;
7:1:234:1:3     Investigation of Ca3TaGa3Si2O14 piezoelectric crystals for high temperature sensors
DOI:10.1063/1.3592347  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Yu, Fapeng;Zhang, Shujun;Zhao, Xian;Yuan, Duorong;Qin, Lifeng;Wang, Qing-ming;Shrout, Thomas R.;
7:1:234:2:1     Diffraction of a focused x-ray beam from La3Ga5SiO14 crystal modulated by surface acoustic waves
DOI:10.1063/1.3669399  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Roshchupkin, Dmitry;Irzhak, Dmitry;Snigirev, Anatolii;Snigireva, Iraida;Ortega, Luc;Sergeev, Alexander;
7:1:234:2:2     X-ray diffraction study of surface acoustic waves and pseudo-surface acoustic waves propagation in La3Ga5.5Ta0.5O14 crystal
DOI:10.1063/1.4801527  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Roshchupkin, Dmitry;Ortega, Luc;Plotitcyna, Olga;Erko, Alexei;Zizak, Ivo;Irzhak, Dmitry;
7:1:234:2:3     Piezoelectric La3Ga5.3Ta0.5Al0.2O14 crystal: growth, crystal structure perfection, piezoelectric, and acoustic properties
DOI:10.1007/s00339-014-8267-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Roshchupkin, Dmitry;Ortega, Luc;Plotitcyna, Olga;Irzhak, Dmitry;Emelin, Evgenii;Fahrtdinov, Rashid;Alenkov, Vladimir;Buzanov, Oleg;
7:1:234:2:4     X-ray diffraction on the X-cut of a Ca3TaGa3Si2O14 single crystal modulated by a surface acoustic wave
DOI:10.1063/1.4884875  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Irzhak, D.;Roshchupkin, D.;
7:1:235:1     A longitudinal (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) single-crystal piezoelectric transformer
DOI:10.1007/s00339-010-5904-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:8  AU: Wang, Feifei;Shi, Wangzhou;Tang, Yanxue;Chen, Xinman;Wang, Tao;Luo, Haosu;
7:1:235:2     High-frequency PIN-PMN-PT single crystal ultrasonic transducer for imaging applications
DOI:10.1007/s00339-012-7009-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:9  AU: Chen, Y.;Lam, K. H.;Zhou, D.;Cheng, W. F.;Dai, J. Y.;Luo, H. S.;Chan, H. L. W.;
7:1:235:3     Preparation and characterization of (1-x)Pb(Lu1/2Nb1/2)O-3-xPbTiO(3) binary ferroelectric ceramics with high Curie temperature
DOI:10.1016/j.matlet.2012.06.041  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Shen, Dongquan;Li, Xiuzhi;Wang, Zujian;Liu, Ying;He, Chao;Li, Tao;Tailor, Hamel;Long, Xifa;
7:1:235:4     Dual-resonance converse magnetoelectric and voltage step-up effects in laminated composite of long-type 0.71Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) piezoelectric single-crystal transformer and Tb0.3Dy0.7Fe1.92 magnetostrictive alloy bars
DOI:10.1063/1.3587574  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Leung, Chung Ming;Or, Siu Wing;Wang, Feifei;Ho, S. L.;
7:1:235:5     Piezo-/dielectric properties of perovskite-structure high-temperature relaxor ferroelectrics: The Pb(Lu1/2Nb1/2)O-3-Pb(Zn1/3Nb2/3)O-3-PbTiO3 ternary ceramics
DOI:10.1016/j.materresbull.2013.12.025  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Li, Tao;Long, Xifa;
7:1:236:1     Ferroelectric ternary solid solution of Pb(Mg1/3Nb2/3)O-3-PbSnO3-PbTiO3 with morphotropic phase boundary
DOI:10.1016/j.ceramint.2012.05.105  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: He, Chao;Li, Xiuzhi;Wang, Zujian;Tailor, Hamel;Liu, Ying;Li, Tao;Long, Xifa;
7:1:236:2     Processing and Electrical Properties in Lead-Based (Pb(Mg1/3Nb2/3)O-3, Pb(Yb1/2Nb1/2)O-3, PbTiO3) Systems
DOI:10.1111/j.1551-2916.2009.03357.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Akca, Erdem;Yilmaz, Hueseyin;Duran, Cihangir;
7:1:236:3     Fabrication and characterization of (Pb(Mg1/3Nb2/3)O-3, Pb(Yb1/2Nb1/2)O-3, PbTiO3) ternary system ceramics
DOI:10.1016/j.ceramint.2011.03.059  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:3  AU: Akca, Erdem;Duran, Cihangir;
7:1:236:4     Dielectric and electromechanical properties of Mn-doped 0.2875 Pb(Mg1/3Nb2/3)O-3-0.2875 Pb(Yb1/2Nb1/2)O-3-0.425 PbTiO3 ceramics
DOI:10.1007/s10853-013-7641-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:0  AU: Akca, Erdem;Tatar, Istek;Duran, Cihangir;
7:1:237:1     Structural and optoelectronic properties, and infrared spectrum of cubic BaSnO3 from first principles calculations
DOI:10.1063/1.4745873  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Moreira, E.;Henriques, J. M.;Azevedo, D. L.;Caetano, E. W. S.;Freire, V. N.;Fulco, U. L.;Albuquerque, E. L.;
7:1:237:2     Ordering and phonons in Ba3CaNb2O9 complex perovskite
DOI:10.1016/j.materresbull.2013.05.005  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Figueiredo Soares Rodrigues, Joao Elias;Moreira, Edvan;Bezerra, Debora Morais;Maciel, Adeilton Pereira;de Araujo Paschoal, Carlos William;
7:1:237:3     Dielectric properties of Ba3-xKxCaNb2O9-delta (0.5 < x < 1.25) (KBCN) double perovskites
DOI:10.1016/j.materresbull.2011.01.026  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:0  AU: Bhella, Surinderjit Singh;Thangadurai, Venkataraman;
7:1:237:4     Investigations on the thermo-chemical stability and electrical conductivity of K-doped Ba3-xKxCaNb2O9-delta (x=0.5, 0.75, 1, 1.25)
DOI:10.1016/j.ssi.2010.05.054  JN:SOLID STATE IONICS  PY:2011
  TC:4  AU: Bhella, Surinderjit Singh;Thangadurai, Venkataraman;
7:1:237:5     Specific features of band structure and optical anisotropy of Cu2CdGeSe4 quaternary compounds
DOI:10.1016/j.matchemphys.2014.04.022  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:2  AU: Brik, M. G.;Parasyuk, O. V.;Myronchuk, G. L.;Kityk, I. V.;
7:1:238:1     Magnetic and dielectric properties on sol-gel combustion synthesis of Pb(Zr-0.52, Ti0.43X0.05)O-3 (X = Fe, Ni, and Co) nanoparticles
DOI:10.1016/j.apt.2014.03.011  JN:ADVANCED POWDER TECHNOLOGY  PY:2014
  TC:0  AU: Khorrami, Gh H.;Zak, A. Khorsand;Banihashemian, S. M.;
7:1:238:2     Dielectric and piezoelectric properties of PZT ceramics doped with strontium and lanthanum
DOI:10.1016/j.ceramint.2010.12.003  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:7  AU: Kalem, Volkan;Cam, Ibrahim;Timucin, Muharrem;
7:1:238:3     Structural, piezoelectric and dielectric properties of PSLZT-PMnN ceramics
DOI:10.1016/j.jeurceramsoc.2012.08.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Kalem, Volkan;Timucin, Muharrem;
7:1:238:4     Characterization and ferroelectricity of Bi and Fe co-doped PZT films
DOI:10.1016/j.mseb.2010.02.005  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:3  AU: Cross, J. S.;Shinozaki, K.;Yoshioka, T.;Tanaka, J.;Kim, S. H.;Morioka, H.;Saito, K.;
7:1:239:1     Effects of Mn doping on the structure and electrical properties of high-temperature BiScO3-PbTiO3-Pb(Zn1/3Nb2/3)O-3 piezoelectric ceramics
DOI:10.1016/j.materresbull.2011.03.034  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:9  AU: Yao, Zhonghua;Liu, Hanxing;Cao, Minghe;Hao, Hua;Yu, Zhiyong;
7:1:239:2     Phase Transitions, Piezo- and Ferroelectric Properties of BiScO3-PbTiO3 Solid Solutions
DOI:10.1080/00150193.2011.594747  JN:FERROELECTRICS  PY:2011
  TC:6  AU: Politova, E. D.;Egorova, B. V.;Kaleva, G. M.;Mosunov, A. V.;Stefanovich, S. Yu.;Segalla, A. G.;Zeng, J.;
7:1:239:3     Influence of Complex Additives on Structure, Microstructure, Phase Transitions and Dielectric Properties of BiScO3-PbTiO3 Ceramics
DOI:10.1080/00150193.2013.822752  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Politova, E. D.;Kaleva, G. M.;Mosunov, A. V.;Sadovskaya, N. V.;Segalla, A. H.;
7:1:239:4     Influence of Complex Additives on Morphology, Phase Transitions, and Dielectric Properties of 0.36BiScO(3)-0.64PbTiO(3) Ceramics
DOI:10.1080/00150193.2012.743804  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Politova, E. D.;Kaleva, G. M.;Mosunov, A. V.;Sadovskaya, N. V.;Segalla, A. H.;Bush, A. A.;
7:1:239:5     Effects of KCl Additives on Structure, Phase Transitions and Dielectric Properties of 0.36BiScO(3)-0.64PbTiO(3) Ceramics
DOI:10.1080/00150193.2014.892404  JN:FERROELECTRICS  PY:2014
  TC:2  AU: Politova, E. D.;Akinfiev, V. S.;Kaleva, G. M.;Mosunov, A. V.;Stefanovich, S. Yu.;Segalla, A. H.;
7:1:240:1     Strong variation of electrostrictive coupling near an intermediate temperature of relaxor ferroelectrics
DOI:10.1103/PhysRevB.81.184111  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Craciun, F.;
7:1:240:2     Strain-induced long range ferroelectric order and linear electro-optic effect in epitaxial relaxor thin films
DOI:10.1063/1.4893364  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Scarisoreanu, N. D.;Craciun, F.;Birjega, R.;Andrei, A.;Ion, V.;Negrea, R. F.;Ghica, C.;Dinescu, M.;
7:1:240:3     Electro-optic and dielectric properties of epitaxial Ph1-3X/2LaxZr0.2Ti0.8O3 thin films obtained by pulsed laser deposition
DOI:10.1016/j.tsf.2012.11.119  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Scarisoreanu, N. D.;Craciun, F.;Andrei, A.;Ion, V.;Birjega, R.;Moldovan, A.;Dinescu, M.;Galassi, C.;
7:1:240:4     Electrical and optical investigations on Pb1-3x/2LaxZr0.2Ti0.8O3 thin films obtained by radiofrequency assisted pulsed laser deposition
DOI:10.1016/j.tsf.2011.11.066  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Scarisoreanu, N. D.;Andrei, A.;Birjega, R.;Pascu, R.;Craciun, F.;Galassi, C.;Raducanu, D.;Dinescu, M.;
7:1:241:1     Phase-field simulation of domain structures in epitaxial BiFeO3 films on vicinal substrates
DOI:10.1063/1.3605674  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Winchester, B.;Wu, P.;Chen, L. Q.;
7:1:241:2     Phase-field simulation on the heteroepitaxial nucleation of (Fe,Co) solid solution on facet phase in undercooled liquid
DOI:10.1016/j.jallcom.2013.06.188  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Yao, W. J.;Ye, Z. P.;Wang, N.;Lee, J. H.;
7:1:241:3     A phase field model of electrochemical impedance spectroscopy
DOI:10.1007/s10853-011-5930-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:7  AU: Gathright, W.;Jensen, M.;Lewis, D.;
7:1:242:1     Growth of LiNb1-xTaxO3 solid solution crystals
DOI:10.1016/j.matchemphys.2012.03.060  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:6  AU: Bartasyte, A.;Glazer, A. M.;Wondre, F.;Prabhakaran, D.;Thomas, P. A.;Huband, S.;Keeble, D. S.;Margueron, S.;
7:1:242:2     Residual stresses and clamped thermal expansion in LiNbO3 and LiTaO3 thin films
DOI:10.1063/1.4752448  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Bartasyte, A.;Plausinaitiene, V.;Abrutis, A.;Murauskas, T.;Boulet, P.;Margueron, S.;Gleize, J.;Robert, S.;Kubilius, V.;Saltyte, Z.;
7:1:242:3     Resolved E-symmetry zone-centre phonons in LiTaO3 and LiNbO3
DOI:10.1063/1.4716001  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Margueron, S.;Bartasyte, A.;Glazer, A. M.;Simon, E.;Hlinka, J.;Gregora, I.;Gleize, J.;
7:1:242:4     Vibrational Fingerprints of LiNbO3-LiTaO3 Mixed Crystals
DOI:10.1080/00150193.2013.821893  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Sanna, S.;Riefer, A.;Neufeld, S.;Schmidt, W. G.;Berth, G.;Ruesing, M.;Widhalm, A.;Zrenner, A.;
7:1:242:5     LiNb1-xTaxO3 Electronic Structure and Optical Response from First-Principles Calculations
DOI:10.1080/00150193.2013.821904  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Riefer, A.;Sanna, S.;Schmidt, W. G.;
7:1:243:1     Improved electrical properties in La- and V-co-doped Na0.5Bi4.5Ti4O15 thin films
DOI:10.1007/s00339-012-6891-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:6  AU: Do, Dalhyun;Kim, Jin Won;Kim, Sang Su;
7:1:243:2     Properties of La-substituted Na0.5Bi4.5Ti4O15 ferroelectric thin films
DOI:10.1016/j.tsf.2010.02.048  JN:THIN SOLID FILMS  PY:2010
  TC:2  AU: Do, Dalhyun;Kim, Jin Won;Kim, Sang Su;Song, Tae Kwon;Choi, Byung Chun;
7:1:243:3     Electrical Properties of V-Doped Na0.5Bi4.5Ti4O15 Thin Films Prepared by Chemical Solution Deposition
DOI:10.1080/00150193.2010.484331  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Kim, J. W.;Do, D.;Kim, S. S.;Song, T. K.;Sung, Y. S.;Kim, M. H.;Choi, B. C.;
7:1:243:4     Enhancement of Ferroelectricity in Neodymium- and Vanadium-Codoped Na(0.5)Bi(4.5)Ti(4)O(15) Thin Films
DOI:10.1111/j.1551-2916.2010.04080.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:1  AU: Do, Dalhyun;Kim, Jin Won;Kim, Sang Su;
7:1:244:1     Piezoelectric properties of pure and (Nb5+ + Fe3+) doped PZT ceramics
DOI:10.1016/j.ceramint.2010.03.025  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:7  AU: Pojucan, M. M. S.;Santos, M. C. C.;Pereira, F. R.;Pinheiro, M. A. S.;Andrade, M. C.;
7:1:244:2     Microstructure Development of PZT Ceramics by Doping with Small Amounts of Al2O3, SiO2, and Fe2O3
DOI:10.1111/jace.12825  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Kuehnlein, Tobias;Stiegelschmitt, Alfons;Roosen, Andreas;Rauscher, Martin;
7:1:244:3     Processing, structure, and electrical properties of MnO2-doped Pb(Yb1/2Nb1/2)(0.10)(Zr0.47Ti0.53)(0.90)O-3 ceramics
DOI:10.1016/j.ceramint.2012.10.054  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Zhang, Yixuan;Chen, Haiyan;Mao, Dali;
7:1:244:4     Piezoelectric Properties and Domain Configurations of PZT Ceramic with NiO Addition
DOI:10.1080/10584587.2013.853575  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Jaitanong, N.;Vittayakorn, W. C.;Zeng, H. R.;Yin, Q. R.;Yimnirun, R.;Chaipanich, A.;
7:1:244:5     Development of a model for the sintering of PZT multilayer ceramics and their dielectric properties
DOI:10.1016/j.jeurceramsoc.2012.10.018  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Kuehnlein, Tobias;Stiegelschmitt, Alfons;Roosen, Andreas;Rauscher, Martin;
7:1:245:1     The structural, dielectric, elastic, and piezoelectric properties of KNbO3 from first-principles methods
DOI:10.1063/1.4712052  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Wan, L. F.;Nishimatsu, T.;Beckman, S. P.;
7:1:245:2     Atomic sublattice decomposition of piezoelectric response in tetragonal PbTiO3, BaTiO3, and KNbO3
DOI:10.1103/PhysRevB.89.094105  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Shi, Jing;Grinberg, Ilya;Wang, Xiaoli;Rappe, Andrew M.;
7:1:245:3     First-principles investigations of ferroelectricity and piezoelectricity in BaTiO3/PbTiO3 superlattices
DOI:10.1103/PhysRevB.85.054108  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Duan, Yifeng;Tang, Gang;Chen, Changqing;Lu, Tianjian;Wu, Zhigang;
7:1:245:4     Sulfur (anion) manipulated highly polar stable ferroelectric perovskite under epitaxial strain
DOI:10.1063/1.4901995  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Amarsanaa, Gantsooj;Odkhuu, Dorj;Ahn, Chang Won;Kim, Ill Won;
7:1:246:1     Large and electric field tunable superelasticity in BaTiO3 crystals predicted by an incremental domain switching criterion
DOI:10.1063/1.4795330  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Li, Y. W.;Ren, X. B.;Li, F. X.;Luo, H. S.;Fang, D. N.;
7:1:246:2     Electric-field-tunable mechanical properties of relaxor ferroelectric single crystal measured by nanoindentation
DOI:10.1063/1.4865773  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zhou, Hao;Pei, Yongmao;Li, Faxin;Luo, Haosu;Fang, Daining;
7:1:246:3     Ultrahigh actuation strains in BaTiO3 and Pb(Mn1/3Nb2/3)O-3-PbTiO3 single crystals via reversible electromechanical domain switching
DOI:10.1063/1.4802728  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Li, Y. W.;Li, F. X.;
7:1:247:1     Aliphatic copolyester with isomorphism in limited composition range
DOI:10.1016/j.polymer.2014.09.029  JN:POLYMER  PY:2014
  TC:0  AU: Ye, Hai-Mu;Tang, Yi-Ren;Song, Yun-Yang;Xu, Jun;Guo, Bao-Hua;Zhou, Qiong;
7:1:247:2     Polymorphic Crystallization of Poly(butylene adipate) and Its Copolymer: Effect of Poly(vinyl alcohol)
DOI:10.1002/app.39600  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2014
  TC:1  AU: Liang, Zhichao;Yang, Jinjun;Hua, Lei;Pan, Pengju;Huang, Jian;Zhang, Jianjun;Abe, Hideki;Inoue, Yoshio;
7:1:247:3     Critical role of the conformation of comonomer units in isomorphic crystallization of poly(hexamethylene adipate-co-butylene adipate) forming Poly(hexamethylene adipate) type crystal
DOI:10.1016/j.polymer.2011.09.014  JN:POLYMER  PY:2011
  TC:7  AU: Liang, Zhichao;Pan, Pengju;Zhu, Bo;Yang, Jinjun;Inoue, Yoshio;
7:1:247:4     Fractionated Crystallization and Self-Nucleation Behavior of Poly(ethylene oxide) in Its Miscible Blends with Poly(3-hydroxybutyrate)
DOI:10.1002/app.32255  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2010
  TC:5  AU: Pan, Pengju;Zhao, Li;Zhu, Bo;He, Yong;Inoue, Yoshio;
7:1:247:5     Isomorphic crystallization of aliphatic copolyesters derived from 1,6-hexanediol: Effect of the chemical structure of comonorner units on the extent of cocrystallization
DOI:10.1016/j.polymer.2011.04.032  JN:POLYMER  PY:2011
  TC:13  AU: Liang, Zhichao;Pan, Pengju;Zhu, Bo;Inoue, Yoshio;
7:1:248:1     Electric field-induced polarization rotation and ultrahigh piezoelectricity in PbTiO3
DOI:10.1063/1.4868320  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Ma, Wenhui;Hao, Aize;
7:1:248:2     Ferroelectric BaTiO3 single crystal under superstrong electric fields up to 55 MV/m: A comparative experimental and theoretical study
DOI:10.1063/1.3386537  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Leontyev, I. N.;Fesenko, O. E.;Leontyev, N. G.;Dkhil, B.;
7:1:248:3     First-principles study of high-field piezoelectricity in tetragonal PbTiO3
DOI:10.1103/PhysRevB.81.014102  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Roy, Anindya;Stengel, Massimiliano;Vanderbilt, David;
7:1:248:4     Polarization rotation and piezoelectricity of electric field-induced monoclinic and triclinic structures in strained PbTiO3
DOI:10.1063/1.4903523  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ma, Wenhui;Hao, Aize;
7:1:249:1     Thermal properties, magneto- and baro-caloric effects in La0.7Pb0.3MnO3 single crystal
DOI:10.1063/1.4792044  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Kartashev, A. V.;Mikhaleva, E. A.;Gorev, M. V.;Bogdanov, E. V.;Cherepakhin, A. V.;Sablina, K. A.;Mikhashonok, N. V.;Flerov, I. N.;Volkov, N. V.;
7:1:249:2     Hydrostatic pressure to trigger and assist magnetic transitions: Baromagnetic refrigeration
DOI:10.1063/1.4868866  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Quintero, M.;Garbarino, G.;Leyva, A. G.;
7:1:249:3     Heat capacity and magnetocaloric effect in manganites (La1-yEuy)(0.7)Pb0.3MnO3 (y:0.2; 0.6)
DOI:10.1016/j.jmmm.2009.10.026  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Kartashev, A. V.;Flerov, I. N.;Volkov, N. V.;Sablina, K. A.;
7:1:250:1     High Frequency PMN-PT 1-3 Composite Transducer for Ultrasonic Imaging Application
DOI:10.1080/00150193.2010.485546  JN:FERROELECTRICS  PY:2010
  TC:9  AU: Sun, Ping;Wang, Gaofeng;Wu, Dawei;Zhu, Benpeng;Hu, Changhong;Liu, Changgeng;Djuth, Frank T.;Zhou, Qifa;Shung, K. Kirk;
7:1:250:2     Piezoelectric Properties of a Pioneering 3-1 Type PZT/Epoxy Composites Based on Freeze-Casting Processing
DOI:10.1111/jace.12793  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Xu, Tingting;Wang, Chang-An;
7:1:250:3     Piezoelectric and mechanical properties of structured PZT-epoxy composites
DOI:10.1557/jmr.2012.428  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:3  AU: James, Nijesh Kunnamkuzhakkal;van den Ende, Daan;Lafont, Ugo;van der Zwaag, Sybrand;Groen, Wilhelm A.;
7:1:251:1     Effect of High-Energy Milling Process on Microstructure and Piezoelectric/Dielectric Properties of 0.99Pb(Zr0.53Ti0.47)O-3-0.01BiYO(3) Ceramic for Piezoelectric Energy Harvesting Devices
DOI:10.1007/s13391-013-3060-z  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:1  AU: Mahmud, Iqbal;Ur, Soon-Chul;Yoon, Man-Soon;
7:1:251:2     The effect of polymer fill ratio in pillar structure for piezoelectric energy harvester
DOI:10.1007/s13391-013-0008-2  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:1  AU: Lee, Kyoung-Soo;Shin, Dong-Jin;Chae, Moon-Soon;Koo, Sang-Mo;Ha, Jae-Geun;Koh, Jung-Hyuk;Cho, Kyung-Ho;Seo, Chang-Eui;Jeong, Soon-Jong;
7:1:251:3     Effect of La2O3 Modified on Pyroelectric Properties of 0.69Pb(Mg1/3Nb2/3)O-3-0.31PbTiO(3) Solid Solutions
DOI:10.1007/s13391-012-2067-1  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:2  AU: Hyun, June Won;Kim, Yeon Jung;Lee, Ju Ho;Lee, Ky Am;
7:1:252:1     Evolution of microstructure and related properties of PbZr0.4Ti0.6O3 films on F-doped tin oxide with annealing temperature
DOI:10.1063/1.3388013  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Zhang, T.;Hu, G. J.;Bu, H. J.;Wu, J.;Chu, J. H.;Dai, N.;
7:1:252:2     A Special Configuration of Lead Zirconate Titanate Multilayer Stack with Superior Electrical and Optical Properties
DOI:10.1111/j.1551-2916.2011.04701.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:1  AU: Zhang, Ting;Hu, Gu-Jin;Bu, Hai-Jun;Cong, Rui;Chen, Xin;Yu, Guo-Lin;Meng, Xiang-Jian;Chu, Jun-Hao;Dai, Ning;
7:1:252:3     Electrical and optical performance of PbZr0.4Ti0.6O3 optical microcavity derived from one single chemical solution
DOI:10.1063/1.4816697  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Cong, R.;Hu, G. J.;Yu, G. L.;Chu, J. H.;Dai, N.;
7:1:253:1     Enhanced piezoelectric response of BaTiO3-KNbO3 composites
DOI:10.1063/1.3662397  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Fujii, Ichiro;Shimizu, Shigehito;Yamashita, Kenta;Nakashima, Kouichi;Kumada, Nobuhiro;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;Fujikawa, Yoshinori;Tanaka, Daisuke;Furukawa, Masahito;Wada, Satoshi;
7:1:253:2     Enhanced piezoelectric properties of barium titanate-potassium niobate nano-structured ceramics by MPB engineering
DOI:10.1016/j.ceramint.2012.10.042  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Wada, Satoshi;Yamashita, Kenta;Fujii, Ichiro;Nakashima, Kouichi;Kumada, Nobuhiro;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;
7:1:253:3     Solvothermal preparation of potassium niobate/barium titanate nanocomplex ceramics with three dimensional network-configuration of structure-gradient region and their dielectric properties
DOI:10.1063/1.4818960  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Ueno, S.;Kawashima, H.;Nakashima, K.;Kumada, N.;Magome, E.;Moriyoshi, C.;Kuroiwa, Y.;Fujikawa, Y.;Tanaka, D.;Furukawa, M.;Wada, S.;
7:1:254:1     Effect of Cu or Co addition on beta-FeSi2 growth by molten salt method
DOI:10.1016/j.jcrysgro.2011.11.059  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:3  AU: Li, W.;Wen, C.;Yamashita, M.;Nonomura, T.;Hayakawa, Y.;Tatsuoka, H.;
7:1:254:2     Distribution of Elements in a Cu-Added FeSi2 Alloy Under Peritectoid and Eutectoid Reactions
DOI:10.1007/s11664-010-1497-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2011
  TC:1  AU: Kiatgamolchai, Somchai;Sakulkalavek, Aparporn;
7:1:254:3     Preparation of Co-Added beta-FeSi2 by Cation-Exchange Reaction between Molten Salts and Si
DOI:10.2320/matertrans.M2009305  JN:MATERIALS TRANSACTIONS  PY:2010
  TC:2  AU: Sakamoto, Motohiro;Morita, Kazuki;
7:1:255:1     Coherency strain enhanced dielectric-temperature property of rare-earth doped BaTiO3
DOI:10.1063/1.4798273  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Jeon, Sang-Chae;Kang, Suk-Joong L.;
7:1:255:2     The Mechanism of Core/Shell Structure Formation During Sintering of BaTiO3-Based Ceramics
DOI:10.1111/j.1551-2916.2012.05111.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:13  AU: Jeon, Sang-Chae;Lee, Chul-Seung;Kang, Suk-Joong L.;
7:1:255:3     Effect of MgO and Y2O3 Doping on the Formation of Core-Shell Structure in BaTiO3 Ceramics
DOI:10.1111/jace.12372  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:5  AU: Chang, Che-Yuan;Wang, Wan-Ning;Huang, Chi-Yuen;
7:1:256:1     Preparation of Bi3.15Dy0.85(Ti3-xFex)O-12(x=0-0.3) Ceramics and Their Electrical Properties
DOI:10.1080/00150193.2012.741967  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Chen Zhi-Hui;Ding Jian-Ning;Shan Ying-Chun;Xu Jiu-Jun;Qiu Jian-Hua;Zhu Yuan-Yuan;
7:1:256:2     Powder Preparation and Piezoelectric Properties Research of Bi-0.5(Na0.82K0.18)(0.5)TiO3-BiFeO3 Lead Free Ceramics
DOI:10.1080/00150193.2011.532042  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Chen Zhi-Hui;Ding Jian-Ning;Yuan Ning-Yi;Zhu Yuan-Yuan;
7:1:256:3     Preparation of Bi4Ti3O12 nanopower by azeotropic co-precipitation and dielectric properties of the sintered ceramic
DOI:10.1016/j.ceramint.2009.07.022  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:1  AU: Zhi-hui, Chen;Jun-fu, Qiu;Cheng, Liu;Jian-ning, Ding;Yuan-yuan, Zhu;
7:1:257:1     Influence of Mn-doping on phase transition characteristics and relaxor behaviour of lead lanthanum zirconate titanate ceramics
DOI:10.1016/j.jeurceramsoc.2011.12.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Perez-Delfin, E.;Garcia, J. E.;Vega-Garcia, A.;Guerrero, F.;Eiras, J. A.;
7:1:257:2     Effect of Mn-acceptor dopant on dielectric and piezoelectric responses of lead lanthanum zirconate titanate piezoceramics
DOI:10.1063/1.3622338  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Perez-Delfin, E.;Garcia, J. E.;Ochoa, D. A.;Perez, R.;Guerrero, F.;Eiras, J. A.;
7:1:257:3     Effect of Mn doping on structures and properties of chemical solution deposited lead zirconate titanate thick films with (100) preferential orientation
DOI:10.1063/1.4812226  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Xin, Hong;Ren, Wei;Wu, Xiaoqing;Shi, Peng;
7:1:258:1     Spark plasma sintering of microwave processed nanocrystalline barium titanate and their characterisations
DOI:10.1016/j.matchemphys.2013.01.026  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:0  AU: Sundararajan, T.;Prabu, S. Balasivanandha;
7:1:258:2     Microwave assisted synthesis of barium zirconium titanate nanopowders
DOI:10.1007/s10853-010-5052-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:3  AU: Vinothini, V.;Vaidhyanathan, B.;Binner, J.;
7:1:258:3     Combined effects of milling and calcination methods on the characteristics of nanocrystalline barium titanate
DOI:10.1016/j.materresbull.2012.02.044  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Sundararajan, T.;Prabu, S. Balasivanandha;Vidyavathy, S. Manisha;
7:1:259:1     Influence of Compressive Stress on Dielectric and Ferroelectric Properties of the Na0.5K0.5NbO3, Na0.5K0.5(Nb0.94Sb0.06)O-3 and Na0.5K0.5(Nb0.94Sb0.06)O-3+0.5mol% MnO2 Ceramics
DOI:10.1080/00150193.2013.845498  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Suchanicz, J.;Faszczowy, I.;Klimkowski, G.;Lewczuk, U.;Karpierz, M.;Sternberg, A.;
7:1:259:2     Uniaxial stress dependence of the dielectric properties in the Na0.5Bi0.5TiO3-NaTaO3 system
DOI:10.1557/JMR.2010.0239  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:4  AU: Konig, Jakob;Spreitzer, Matjaz;Jancar, Bostjan;Tolchard, Julian;Einarsrud, Mari-Ann;Suvorov, Danilo;
7:1:259:3     Dielectric Properties of Na0.5K0.5(Nb1-xSbx)O-3+MnO2 Ceramics (x=0.04, 0.05 and 0.06)
DOI:10.1080/10584587.2011.570651  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Suchanicz, J.;Finder, A.;Smeltere, I.;Konieczny, K.;Jankowska-Sumara, I.;Garbarz-Glos, B.;Sokolowski, M.;Bujakiewicz-Koronska, R.;Pytel, K.;Antonova, M.;Sternberg, A.;
7:1:260:1     Effect of oxygen sintering on the structural and electrical properties of KNN ceramics
DOI:10.1016/j.ceramint.2011.05.162  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Palei, P.;Pattanaik, M.;Kumar, P.;
7:1:260:2     Synthesis, Characterization and Multiferroic Properties of Ni0.5Zn0.5Fe2O4-K0.5Na0.5NbO3 Nanocomposites
DOI:10.1080/00150193.2013.842118  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Tangcharoen, Thanit;Ruangphanit, Anucha;Klysubun, Wantana;Pecharapa, Wisanu;
7:1:261:1     Effect of nano-TiO2 on the polarization process of polyimide/TiO2 composites
DOI:10.1016/j.matlet.2013.01.037  JN:MATERIALS LETTERS  PY:2013
  TC:10  AU: Feng, Yu;Yin, Jinghua;Chen, Minghua;Song, Mingxin;Su, Bo;Lei, Qingquan;
7:1:261:2     Electrical properties of TiO2-filled polyimide nanocomposite films prepared via an in situ polymerization process
DOI:10.1016/j.synthmet.2010.10.024  JN:SYNTHETIC METALS  PY:2010
  TC:15  AU: Zha, Jun-Wei;Dang, Zhi-Min;Zhou, Tao;Song, Hong-Tao;Chen, George;
7:1:262:1     Microstructural Analysis and Mechanical Properties of Pb(Zr,Ti)O-3 Fibers Derived by Different Processing Routes
DOI:10.1111/j.1551-2916.2010.03742.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Dittmer, Robert;Clemens, Frank;Schoenecker, Andreas;Scheithauer, Uwe;Rojas-Ismael, Marina;Graule, Thomas;
7:1:262:2     Ab initio calculations for the tetragonal PbZr0.5Ti0.5O3
DOI:10.1016/j.commatsci.2013.05.009  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2013
  TC:3  AU: Bujakiewicz-Koronska, Renata;
7:1:263:1     Electrocaloric Effect in Na1/2Bi1/2TiO3-SrTiO3-PbTiO3 Solid Solutions
DOI:10.1080/00150193.2012.675264  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Hagberg, J.;Dunce, M.;Birks, E.;Antonova, M.;Sternberg, A.;
7:1:263:2     Phase Transitions in Na1/2Bi1/2TiO3-SrTiO3-PbTiO3 Solid Solutions
DOI:10.1080/00150193.2010.482889  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Dunce, M.;Birks, E.;Antonova, M.;Sternberg, A.;
7:1:264:1     Quantitative Description of the Diffuse Phase Transition of BNT-NKN Ceramics
DOI:10.1080/00150193.2012.707854  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Liu, Laijun;Shi, Danping;Huang, Yanmin;Wu, Shuangshuang;Chen, Xiuli;Fang, Liang;Hu, Changzheng;
7:1:264:2     Electrostrictive and relaxor ferroelectric behavior in BiAlO3-modified BaTiO3 lead-free ceramics
DOI:10.1063/1.4794022  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Zheng, Shaoying;Odendo, Erika;Liu, Laijun;Shi, Danping;Huang, Yanming;Fan, Longlong;Chen, Jun;Fang, Liang;Elouadi, Brahim;
7:2:1:1     Effect of Eu substitution on the crystal structure and multiferroic properties of BiFeO3
DOI:10.1016/j.jallcom.2010.07.144  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:69  AU: Zhang, Xingquan;Sui, Yu;Wang, Xianjie;Wang, Yang;Wang, Zhu;
7:2:1:2     Effects of microwave sintering power on microstructure, dielectric, ferroelectric and magnetic properties of bismuth ferrite ceramics
DOI:10.1016/j.jallcom.2012.11.154  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:16  AU: Cai, Wei;Fu, Chunlin;Hu, Wenguang;Chen, Gang;Deng, Xiaoling;
7:2:1:3     Microstructure and properties of Co-, Ni-, Zn-, Nb- and W-modified multiferroic BiFeO3 ceramics
DOI:10.1016/j.jeurceramsoc.2009.09.016  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:62  AU: Azough, Feridoon;Freer, Robert;Thrall, Michael;Cernik, Robert;Tuna, Floriana;Collison, David;
7:2:1:4     Enhanced multiferroic properties of single-phase BiFeO3 bulk ceramics by Ho doping
DOI:10.1063/1.3552682  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:46  AU: Jeon, Nari;Rout, Dibyaranjan;Kim, Ill Won;Kang, Suk-Joong L.;
7:2:1:5     Effect of La doping on dielectric properties of BiFe0.95Mn0.05O3 multiferroics
DOI:10.1016/j.ceramint.2014.06.114  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Saxena, Aparna;Sharma, Prachi;Saxena, Anjali;Verma, Vivek;Saxena, Raghvendra Sahai;
7:2:1:6     Multiferroic behavior in glass-crystal nanocomposites containing Te2NiMnO6
DOI:10.1016/j.jallcom.2011.03.007  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Maiti, R. P.;Dutta, S.;Basu, S.;Mitra, M. K.;Chakravorty, Dipankar;
7:2:1:7     Enhanced magnetic and dielectric properties of Eu and Co co-doped BiFeO3 nanoparticles
DOI:10.1063/1.4738992  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:37  AU: Chakrabarti, Kaushik;Das, Kajari;Sarkar, Babusona;Ghosh, Sirshendu;De, S. K.;Sinha, Godhuli;Lahtinen, J.;
7:2:1:8     Phase pure synthesis of BiFeO3 nanopowders using diverse precursor via co-precipitation method
DOI:10.1016/j.jallcom.2011.08.063  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:23  AU: Shami, M. Yasin;Awan, M. S.;Anis-ur-Rehman, M.;
7:2:1:9     Structure, ferroelectric/magnetoelectric properties and leakage current density of (Bi0.85Nd0.15)FeO3 thin films
DOI:10.1016/j.jallcom.2011.02.030  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:25  AU: Simoes, A. Z.;Cavalcante, L. S.;Moura, F.;Longo, E.;Varela, J. A.;
7:2:1:10     Microstructure, dielectric and ferroelectric properties of xBaZr(0.2)Ti(0.8)O(3)-(1-x)BiFeO3 solid solution ceramics
DOI:10.1016/j.materresbull.2013.11.029  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:3  AU: Cai, Wei;Zhong, Shixing;Fu, Chunlin;Chen, Gang;Deng, Xiaoling;
7:2:1:11     Structure, Ferroelectric, Piezoelectric, and Ferromagnetic Properties of BiFeO3-BaTiO3-Bi0.5Na0.5TiO3 Lead-Free Multiferroic Ceramics
DOI:10.1111/jace.13169  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Li, Ying;Jiang, Na;Lam, Kwok Ho;Guo, Yongquan;Zheng, Qiaoji;Li, Qiang;Zhou, Wei;Wan, Yang;Lin, Dunmin;
7:2:1:12     Enhanced multiferroic properties and domain structure of La-doped BiFeO3 thin films
DOI:10.1016/j.scriptamat.2010.06.013  JN:SCRIPTA MATERIALIA  PY:2010
  TC:61  AU: Yan, F.;Zhu, T. J.;Lai, M. O.;Lu, L.;
7:2:1:13     BiFeO3: A Review on Synthesis, Doping and Crystal Structure
DOI:10.1080/10584587.2011.574986  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:35  AU: Silva, J.;Reyes, A.;Esparza, H.;Camacho, H.;Fuentes, L.;
7:2:1:14     Structural and multiferroic properties of the Ce-doped BiFeO3 thin films
DOI:10.1016/j.jallcom.2009.12.152  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:36  AU: Liu, Jun;Li, Meiya;Pei, Ling;Wang, Jing;Yu, Benfang;Wang, Xiao;Zhao, Xingzhong;
7:2:1:15     In situ synthesis and characterization of fine-patterned La and Mn co-doped BiFeO3 film
DOI:10.1016/j.jallcom.2013.03.191  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Yan, Fuxue;Zhao, Gaoyang;Song, Na;Zhao, Nana;Chen, Yuanqing;
7:2:1:16     Effects of Mn doping on multiferroic and magnetocapacitive properties of 0.33Ba(0.70)Ca(0.30)TiO(3)-0.67BiFeO(3) diphasic ceramics
DOI:10.1016/j.jallcom.2013.11.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Li, Cai-Xia;Yang, Bin;Zhang, Shan-Tao;Liu, Dan-Qing;Zhang, Rui;Sun, Ye;Cao, Wen-Wu;
7:2:1:17     Charge defects and highly enhanced multiferroic properties in Mn and Cu co-doped BiFeO3 thin films
DOI:10.1016/j.apsusc.2014.02.159  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:8  AU: Dong, Guohua;Tan, Guoqiang;Luo, Yangyang;Liu, Wenlong;Xia, Ao;Ren, Huijun;
7:2:1:18     Effect of A site and B site doping on structural, thermal, and dielectric properties of BiFeO3 ceramics
DOI:10.1016/j.jallcom.2011.05.106  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:41  AU: Varshney, Dinesh;Kumar, Ashwini;Verma, Kavita;
7:2:1:19     Structural, electrical, and magnetic properties of multiferroic Bi1-xLaxFe1-yCoyO3 thin films
DOI:10.1063/1.3437232  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:48  AU: Yang, K. G.;Zhang, Y. L.;Yang, S. H.;Wang, B.;
7:2:1:20     Enhanced ferroelectricity, piezoelectricity, and ferromagnetism in Nd-modified BiFeO3-BaTiO3 lead-free ceramics
DOI:10.1063/1.4901198  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zheng, Qiaoji;Luo, Lingling;Lam, Kwok Ho;Jiang, Na;Guo, Yongquan;Lin, Dunmin;
7:2:1:21     Single phase, electrically insulating, multiferroic La-substituted BiFeO3 prepared by mechanosynthesis
DOI:10.1039/c4tc01426j  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:4  AU: Perejon, Antonio;Sanchez-Jimenez, Pedro E.;Perez-Maqueda, Luis A.;Criado, Jose M.;Romero de Paz, Julio;Saez-Puche, Regino;Maso, Nahum;West, Anthony R.;
7:2:1:22     Structural transformation and multiferroic properties of single-phase Bi0.89Tb0.11Fe1-xMnxO3 thin films
DOI:10.1016/j.apsusc.2013.11.068  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:7  AU: Dong, Guohua;Tan, Guoqiang;Luo, Yangyang;Liu, Wenlong;Ren, Huijun;Xia, Ao;
7:2:1:23     The magnetic properties of La doped and codoped BiFeO3
DOI:10.1016/j.jallcom.2010.03.131  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:46  AU: Zheng, Xiaohong;Xu, Qingyu;Wen, Zheng;Lang, Xianzhong;Wu, D.;Qiu, T.;Xu, M. X.;
7:2:1:24     Study on pure and Nd-doped BiFeO3 thin films prepared by chemical solution deposition method
DOI:10.1016/j.jallcom.2014.03.122  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Xue, Xu;Tan, Guoqiang;Liu, Wenlong;Hao, Hangfei;
7:2:1:25     Modifications in the rhombohedral degree of distortion and magnetic properties of Ba-doped BiFeO3 as a function of synthesis methodology
DOI:10.1016/j.matchemphys.2014.02.044  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:5  AU: Rojas-George, G.;Silva, J.;Castaneda, R.;Lardizabal, D.;Graeve, O. A.;Fuentes, L.;Reyes-Rojas, A.;
7:2:1:26     Dielectric, magnetic, and magnetoelectric properties of La and Ti codoped BiFeO3
DOI:10.1063/1.3524225  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:33  AU: Cui, Y. F.;Zhao, Y. G.;Luo, L. B.;Yang, J. J.;Chang, H.;Zhu, M. H.;Xie, D.;Ren, T. L.;
7:2:1:27     Effect of bivalent Co ion doping on electric properties of Bi0.85Nd0.15FeO3 thin film
DOI:10.1016/j.jallcom.2013.04.080  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Xue, Xu;Tan, Guoqiang;
7:2:1:28     Improved Structure Stability and Multiferroic Characteristics in CaTiO3-Modified BiFeO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04824.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:33  AU: Wang, Qing Qing;Wang, Zhuo;Liu, Xiao Qiang;Chen, Xiang Ming;
7:2:1:29     Crystal structure and magnetic property of Nd doped BiFeO3 nanocrytallites
DOI:10.1016/j.matlet.2010.11.002  JN:MATERIALS LETTERS  PY:2011
  TC:35  AU: Gautam, Ashish;Singh, K.;Sen, K.;Kotnala, R. K.;Singh, M.;
7:2:1:30     Theoretical and experimental evidence of enhanced ferromagnetism in Ba and Mn cosubstituted BiFeO3
DOI:10.1063/1.3280043  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:29  AU: Jayakumar, O. D.;Achary, S. N.;Girija, K. G.;Tyagi, A. K.;Sudakar, C.;Lawes, G.;Naik, R.;Nisar, J.;Peng, X.;Ahuja, R.;
7:2:1:31     Structure and multiferroic properties of Sr substituted Bi0.89-xSm0.11SrxFe0.94(Mn0.04Cr0.02)O-3 thin films
DOI:10.1016/j.ceramint.2014.05.032  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Liu, Wenlong;Tan, Guoqiang;Xue, Xu;Dong, Guohua;Ren, Huijun;Xia, Ao;
7:2:1:32     Investigations on the properties of pure and rare earth modified bismuth ferrite ceramics
DOI:10.1016/j.jallcom.2009.12.157  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:44  AU: Kazhugasalamoorthy, S.;Jegatheesan, P.;Mohandoss, R.;Giridharan, N. V.;Karthikeyan, B.;Joseyphus, R. Justin;Dhanuskodi, S.;
7:2:1:33     The role of doping on the structural and functional properties of BiFe1-xMnxO3 magnetoelectric ceramics
DOI:10.1016/j.jallcom.2010.05.135  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:44  AU: Ianculescu, Adelina;Gheorghiu, Felicia Prihor;Postolache, Petronel;Oprea, Ovidiu;Mitoseriu, Liliana;
7:2:1:34     Enhancement in magnetic and dielectric properties of La and Pr co substituted BiFeO3
DOI:10.1016/j.jallcom.2012.09.142  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:17  AU: Srivastava, Amit;Singh, H. K.;Awana, V. P. S.;Srivastava, O. N.;
7:2:1:35     The Effect of Heat Treatment on Structural and Multiferroic Properties of Phase-Pure BiFeO3
DOI:10.1007/s11664-012-2138-y  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:3  AU: Shami, M. Yasin;Awan, M. S.;Anis-ur-Rehman, M.;
7:2:1:36     Magnetic properties of La and (La, Zr) doped BiFeO3 ceramics
DOI:10.1007/s10853-010-4805-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:41  AU: Lan, Changyong;Jiang, Yuwen;Yang, Shaoguang;
7:2:1:37     Intrinsic Compositional Inhomogeneities in Bulk Ti-Doped BiFeO3: Microstructure Development and Multiferroic Properties
DOI:10.1021/cm303743h  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:23  AU: Bernardo, M. S.;Jardiel, T.;Peiteado, M.;Mompean, F. J.;Garcia-Hernandez, M.;Garcia, M. A.;Villegas, M.;Caballero, A. C.;
7:2:1:38     Nanostructured bismuth ferrites synthesized by solvothermal process
DOI:10.1016/j.jallcom.2009.11.049  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:23  AU: Chaudhuri, A.;Mitra, S.;Mandal, M.;Mandal, K.;
7:2:1:39     Enhanced ferromagnetism of cluster-assembled BiFeO3 nanostructured films
DOI:10.1016/j.tsf.2014.02.031  JN:THIN SOLID FILMS  PY:2014
  TC:5  AU: Zhao, Shifeng;Ma, Zhen;Xing, Wenyu;Ma, Yinina;Bai, Alima;Yun, Qi;Chen, Jieyu;
7:2:1:40     Nonmagnetic Fe-site doping of BiFeO3 multiferroic ceramics
DOI:10.1063/1.3327885  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:35  AU: Wei, Jie;Haumont, Raphael;Jarrier, Romain;Berhtet, Patrik;Dkhil, Brahim;
7:2:1:41     Comparative study on substitution effects in BiFeO3 thin films fabricated on FTO substrates by chemical solution deposition
DOI:10.1016/j.apsusc.2013.05.147  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:7  AU: Xue, Xu;Tan, Guoqiang;Hao, Hangfei;Ren, Huijun;
7:2:1:42     Enhancement of ferromagnetic and dielectric properties in lanthanum doped BiFeO3 by hydrothermal synthesis
DOI:10.1016/j.jallcom.2009.10.124  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:37  AU: Du, Yi;Cheng, Zhen Xiang;Shahbazi, Mahboobeh;Collings, Edward W.;Dou, Shi Xue;Wang, Xiao Lin;
7:2:1:43     Structural, electronic and optical properties of BiFeO3 studied by first-principles
DOI:10.1016/j.jallcom.2010.10.084  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:16  AU: Liu, Kun;Fan, Huiqing;Ren, Pengrong;Yang, Chao;
7:2:1:44     Effect of Ni substitution on the crystal structure and magnetic properties of BiFeO3
DOI:10.1016/j.jallcom.2013.01.005  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:14  AU: Zhao, Jianguo;Zhang, Xianghui;Liu, Shijiang;Zhang, Weiying;Liu, Zhaojun;
7:2:1:45     Effect of La3+ substitution on the phase transitions, microstructure and electrical properties of Bi1-xLaxFeO3 ceramics
DOI:10.1016/j.jallcom.2012.08.067  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:33  AU: Zhang, Qiang;Zhu, Xiaohong;Xu, Yunhui;Gao, Haobin;Xiao, Yunjun;Liang, Dayun;Zhu, Jiliang;Zhu, Jianguo;Xiao, Dingquan;
7:2:1:46     Structure transition and enhanced multiferroic properties of Dy-doped BiFeO3
DOI:10.1016/j.jallcom.2013.10.174  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:10  AU: Xu, Jianmei;Ye, Gonglan;Zeng, Min;
7:2:1:47     Enhanced ferroelectric and ferromagnetic performance of 2-2 type (Bi,Eu)(Fe,Mn)O-3/CoFe2O4 bilayered thin film
DOI:10.1016/j.jallcom.2014.06.103  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Dong, Guohua;Tan, Guoqiang;Luo, Yangyang;Liu, Wenlong;Ren, Huijun;Xia, Ao;
7:2:1:48     Structural Transition and Multiferroic Properties of Eu-Doped BiFeO3 Thin Films
DOI:10.1111/j.1551-2916.2010.03766.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:26  AU: Hu, Zhongqiang;Li, Meiya;Liu, Jun;Pei, Ling;Wang, Jing;Yu, Benfang;Zhao, Xingzhong;
7:2:1:49     Magnetic and dielectric properties of Eu-doped BiFeO3 nanoparticles by acetic acid-assisted sol-gel method
DOI:10.1063/1.3662178  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:22  AU: Chakrabarti, Kaushik;Das, Kajari;Sarkar, Babusona;De, S. K.;
7:2:1:50     Structural transitions and enhanced ferroelectricity in Ca and Mn co-doped BiFeO3 thin films
DOI:10.1063/1.3650460  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:40  AU: Huang, Ji-Zhou;Shen, Yang;Li, Ming;Nan, Ce-Wen;
7:2:1:51     Nanoscale piezoresponse and magnetic studies of multiferroic Co and Pr co-substituted BFO thin films
DOI:10.1016/j.materresbull.2012.09.026  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:14  AU: Panwar, Neeraj;Coondoo, Indrani;Tomar, Amit;Kholkin, A. L.;Puli, Venkata S.;Katiyar, Ram S.;
7:2:1:52     A comparative investigation on structure and multiferroic properties of bismuth ferrite thin films by multielement co-doping
DOI:10.1016/j.materresbull.2014.09.030  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Dong, Guohua;Tan, Guoqiang;Luo, Yangyang;Liu, Long;Xia, Ao;Ren, Huijun;
7:2:1:53     Effect of Ho3+ doping on the electric, dielectric, ferromagnetic properties and T-C of BiFeO3 ceramics
DOI:10.1016/j.ceramint.2013.09.070  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Song, G. L.;Ma, G. J.;Su, J.;Wang, T. X.;Yang, H. Y.;Chang, F. G.;
7:2:1:54     Effect of bottom electrode and resistive layer on the dielectric and ferroelectric properties of sol-gel derived BiFeO3 thin films
DOI:10.1016/j.jallcom.2010.10.135  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:18  AU: Huang, A.;Shannigrahi, S. R.;
7:2:1:55     Optical, ferroelectric and magnetic properties of multiferroelectric BiFeO3-(K0.5Na0.5)(0.4)(Sr0.6Ba0.4)(0.8)Nb2O6 thin films
DOI:10.1016/j.jallcom.2013.10.077  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Yao, Y. B.;Mak, C. L.;
7:2:1:56     Effect of Sm, Co codoping on the dielectric and magnetoelectric properties of BiFeO3 polycrystalline ceramics
DOI:10.1016/j.jmmm.2012.02.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:25  AU: Song, G. L.;Zhang, H. X.;Wang, T. X.;Yang, H. G.;Chang, F. G.;
7:2:1:57     Enhanced ferromagnetism and microwave absorption properties of BiFeO3 nanocrystals with Ho substitution
DOI:10.1016/j.matlet.2012.06.050  JN:MATERIALS LETTERS  PY:2012
  TC:25  AU: Hou, Zhi-Ling;Zhou, Hai-Feng;Kong, Ling-Bao;Jin, Hai-Bo;Qi, Xin;Cao, Mao-Sheng;
7:2:1:58     Phase transition and enhanced multiferroic properties of (Sm, Mn and Cr) co-doped BiFeO3 thin films
DOI:10.1016/j.ceramint.2014.04.058  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Liu, Wenlong;Tan, Guoqiang;Xue, Xu;Dong, Guohua;Ren, Huijun;Xia, Ao;
7:2:1:59     Preparation and properties of (1-x)BiFeO3-xBaTiO3 multiferroic ceramics
DOI:10.1016/j.jallcom.2010.07.098  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:29  AU: Gheorghiu, Felicia Prihor;Ianculescu, Adelina;Postolache, Petronel;Lupu, Nicoleta;Dobromir, Marius;Luca, Dumitru;Mitoseriu, Liliana;
7:2:1:60     Energy levels and photoluminescence properties of nickel-doped bismuth ferrite
DOI:10.1016/j.jallcom.2010.05.107  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:18  AU: Mishra, Dillip K.;Qi, Xiaoding;
7:2:1:61     Multiferroic and magnetoelectric properties of single-phase Bi0.85La0.1Ho0.05FeO3 ceramics
DOI:10.1016/j.jallcom.2011.03.037  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:18  AU: Zhang, Xingquan;Sui, Yu;Wang, Xianjie;Mao, Jinhua;Zhu, Ruibin;Wang, Yi;Wang, Zhu;Liu, Yuqiang;Liu, Wanfa;
7:2:1:62     Structural, magnetic and dielectric properties of Pr-modified BiFeO3 multiferroic
DOI:10.1016/j.jallcom.2013.08.159  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:18  AU: Varshney, Dinesh;Sharma, Poorva;Satapathy, S.;Gupta, P. K.;
7:2:1:63     Effect of Ln ( Ln = La, Pr) and Co co-doped on the magnetic and ferroelectric properties of BiFeO3 nanoparticles
DOI:10.1016/j.jallcom.2013.09.117  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:12  AU: Mao, Weiwei;Wang, Xingfu;Han, Yumin;Li, Xing'ao;Li, Yongtao;Wang, Yufeng;Ma, Yanwen;Feng, Xiaomiao;Yang, Tao;Yang, Jianping;Huang, Wei;
7:2:1:64     Microstructure, Ferroelectric, Piezoelectric, and Ferromagnetic Properties of Sc-Modified BiFeO3-BaTiO3 Multiferroic Ceramics with MnO2 Addition
DOI:10.1111/jace.12827  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Wan, Yang;Li, Ying;Li, Qiang;Zhou, Wei;Zheng, Qiaoji;Wu, Xiaochun;Xu, Chenggang;Zhu, Benpeng;Lin, Dunmin;
7:2:1:65     Enhanced dielectric and multiferroic properties of single-phase Y and Zr co-doped BiFeO3 ceramics
DOI:10.1063/1.4825216  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Xu, Jianlong;Xie, Dan;Yin, Cong;Feng, Tingting;Zhang, Xiaowen;Li, Gang;Zhao, Haiming;Zhao, Yuanfan;Ma, Shuo;Ren, Tian-Ling;Guan, Yujie;Gao, Xingsen;Zhao, Yonggang;
7:2:1:66     Microstructure, ferroelectric and piezoelectric properties of Bi0.5K0.5TiO3-modified BiFeO3-BaTiO3 lead-free ceramics with high Curie temperature
DOI:10.1016/j.jeurceramsoc.2013.06.029  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:12  AU: Lin, Dunmin;Zheng, Qiaoji;Li, Ying;Wan, Yang;Li, Qiang;Zhou, Wei;
7:2:1:67     Structural, magnetic, and electrical properties of Gd-doped BiFeO3 nanoparticles with reduced particle size
DOI:10.1007/s11051-012-0742-7  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2012
  TC:37  AU: Lotey, Gurmeet Singh;Verma, N. K.;
7:2:1:68     Enhanced magnetic properties of Sm and Mn co-doped BiFeO3 nanoparticles at room temperature
DOI:10.1016/j.matlet.2012.11.131  JN:MATERIALS LETTERS  PY:2013
  TC:15  AU: Arya, G. S.;Sharma, R. K.;Negi, N. S.;
7:2:1:69     Structural, electrical and magnetic properties of (Bi0.9RE0.1)(Fe0.97Co0.03)O-3 (RE = Nd and Gd) thin films
DOI:10.1016/j.materresbull.2014.01.015  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Xue, Xu;Tan, Guoqiang;Liu, Wenlong;Ren, Huijun;
7:2:1:70     Effects of trivalent gadolinium and cobalt co-substitution on the crystal structure, electronic transport, and ferromagnetic properties of bismuth ferrite
DOI:10.1016/j.mssp.2014.09.004  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:1  AU: Song, G. L.;Su, J.;Ma, G. J.;Wang, T. X.;Yang, H. G.;Chang, F. G.;
7:2:1:71     Structural evolution and physical properties of Bi1-xGdxFeO3 ceramics
DOI:10.1016/j.actamat.2010.03.007  JN:ACTA MATERIALIA  PY:2010
  TC:30  AU: Li, J. -B.;Rao, G. H.;Xiao, Y.;Liang, J. K.;Luo, J.;Liu, G. Y.;Chen, J. R.;
7:2:1:72     Dispersion studies of La substitution on dielectric and ferroelectric properties of multiferroic BiFeO3 ceramic
DOI:10.1016/j.ceramint.2011.06.059  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:22  AU: Sen, K.;Singh, K.;Gautam, Ashish;Singh, M.;
7:2:1:73     Structural, magnetic, vibrational and impedance properties of Pr and Ti codoped BiFeO3 multiferroic ceramics
DOI:10.1016/j.ceramint.2013.12.124  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Sati, Prakash Chandra;Arora, Manisha;Chauhan, Sunil;Kumar, Manoj;Chhoker, Sandeep;
7:2:1:74     Comparative study on multiferroic (Bi0.9RE0.1)(Fe0.97Co0.03)O3-delta (RE=Ce and Ho) thin films: Structural, electrical and optical properties
DOI:10.1016/j.ceramint.2013.11.082  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Xue, Xu;Tan, Guoqiang;Liu, Wenlong;Ren, Huijun;
7:2:1:75     Structural, dielectric and magnetic properties of Pr substituted Bi1-xPrxFeO3 (0 <= x <= 0.15) multiferroic compounds
DOI:10.1016/j.jallcom.2010.04.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:29  AU: Kumar, Neeraj;Panwar, Neeraj;Gahtori, Bhasker;Singh, Neelam;Kishan, H.;Awana, V. P. S.;
7:2:1:76     Sintering and microstuctural characterization of W6+, Nb5+ and Ti4+ iron-substituted BiFeO3
DOI:10.1016/j.jallcom.2011.04.087  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:11  AU: Bernardo, M. S.;Jardiel, T.;Peiteado, M.;Caballero, A. C.;Villegas, M.;
7:2:1:77     Magnetic, dielectric and magnetoelectric properties of CoFe2O4-Bi0.85La0.15FeO3 multiferroic composites
DOI:10.1016/j.jallcom.2013.06.058  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Mo, Hua-Li;Jiang, Dong-Mei;Wang, Chun-Mei;Zhang, Wei-Guo;Jiang, Ji-Sen;
7:2:1:78     Relative thickness effects on multiferroic Bi0.9Gd0.1Fe0.96Mn0.04O3/NiFe2O4 bilayered thin films
DOI:10.1016/j.jallcom.2014.07.220  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Tan, Guoqiang;Liu, Wenlong;Xue, Xu;Hao, Hangfei;
7:2:1:79     Phase formation, dielectric and magnetic properties of bismuth ferrite-lead magnesium niobate multiferroic composites
DOI:10.1016/j.jallcom.2014.04.089  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Wongmaneerung, R.;Padchasri, J.;Tipakontitikul, R.;Loan, T. H.;Jantaratana, P.;Yimnirun, R.;Ananta, S.;
7:2:1:80     Enhancement of multiferroic properties of nanocrystalline BiFeO3 powder by Gd-doping
DOI:10.1016/j.jallcom.2014.01.245  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:9  AU: Mukherjee, A.;Basu, S.;Manna, P. K.;Yusuf, S. M.;Pal, M.;
7:2:1:81     Effects of Transition Metal Ion Doping on Structure and Electrical Properties of Bi0.9Eu0.1FeO3 Thin Films
DOI:10.1111/j.1551-2916.2012.05081.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:16  AU: Raghavan, Chinnambedu Murugesan;Do, Dalhyun;Kim, Jin Won;Kim, Won-Jeong;Kim, Sang Su;
7:2:1:82     Room temperature dielectric and magnetic properties of Gd and Ti co-doped BiFeO3 ceramics
DOI:10.1063/1.4861151  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Basith, M. A.;Kurni, O.;Alam, M. S.;Sinha, B. L.;Ahmmad, Bashir;
7:2:1:83     Magnetic, ferroelectric and magnetoelectric properties of Ba-doped BiFeO3
DOI:10.1016/j.jmmm.2012.01.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:33  AU: Das, Rajasree;Mandal, K.;
7:2:1:84     Multiferroic properties of La and Mn co-doped BiFeO3 nanofibers by sol-gel and electrospinning technique
DOI:10.1016/j.matlet.2012.09.012  JN:MATERIALS LETTERS  PY:2013
  TC:16  AU: Li, Bin;Wang, Chunqing;Liu, Wei;Ye, Mao;Wang, Ning;
7:2:1:85     Nd doping effect on Bi1-xNdxFe0.97Co0.03O3 thin films: Microstructural, electrical, optical and enhanced multiferroic properties
DOI:10.1016/j.matchemphys.2014.03.020  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Xue, Xu;Tan, Guoqiang;Liu, Wenlong;Ren, Huijun;
7:2:1:86     Dielectric dynamics of epitaxial BiFeO3 thin films
DOI:10.1063/1.4721670  JN:AIP ADVANCES  PY:2012
  TC:1  AU: Ren, Peng;Liu, Peng;Xia, Bin;Zou, Xi;You, Lu;Wang, Junling;Wang, Lan;
7:2:1:87     High room temperature ferromagnetic moment of Ho substituted nanocrystalline BiFeO3
DOI:10.1063/1.3502481  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Thakuria, Pankaj;Joy, P. A.;
7:2:1:88     Investigation of transport behavior in Ba doped BiFeO3
DOI:10.1016/j.ceramint.2012.01.032  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:28  AU: Makhdoom, A. R.;Akhtar, M. J.;Rafiq, M. A.;Hassan, M. M.;
7:2:1:89     Crystal structure refinement of Bi1-xNdxOFeO3 multiferroic by the Rietveld method
DOI:10.1016/j.ceramint.2012.01.046  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:40  AU: Kumar, Ashwini;Varshney, Dinesh;
7:2:1:90     Structural, electric and multiferroic properties of Sm-doped BiFeO3 thin films prepared by the sol-gel process
DOI:10.1016/j.ceramint.2013.01.042  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Xue Xu;Tan Guoqiang;Ren Huijun;Xia Ao;
7:2:1:91     Structural, vibrational, optical, magnetic and dielectric properties of Bi1-xBaxFeO3 nanoparticles
DOI:10.1016/j.ceramint.2013.01.066  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:24  AU: Chauhan, Sunil;Arora, Manisha;Sati, P. C.;Chhoker, Sandeep;Katyal, S. C.;Kumar, Manoj;
7:2:1:92     High dielectric loss and microwave absorption behavior of multiferroic BiFeO3 ceramic
DOI:10.1016/j.ceramint.2013.01.068  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Yuan, Jie;Hou, Zhi-Ling;Yang, Hui-Jing;Li, Yong;Kang, Yu-Qing;Song, Wei-Li;Jin, Hai-Bo;Fang, Xiao-Yong;Cao, Mao-Sheng;
7:2:1:93     Structural analysis and magnetic properties of Gd doped BiFeO3 ceramics
DOI:10.1016/j.ceramint.2014.05.137  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Ablat, Abduleziz;Wu, Rong;Mamat, Mamatrishat;Li, Jing;Muhemmed, Emin;Si, Cheng;Wu, Rui;Wang, Jiaou;Qian, Haijie;Ibrahim, Kurash;
7:2:1:94     Crystal structure and highly enhanced ferroelectric properties of (Tb, Cr) co-doped BiFeO3 thin films fabricated by a sol gel method
DOI:10.1016/j.ceramint.2013.07.099  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:11  AU: Dong, Guohua;Tan, Guoqiang;Liu, Wenlong;Xia, Ao;Ren, Huijun;
7:2:1:95     Transition metal modified bulk BiFeO3 with improved magnetization and linear magneto-electric coupling
DOI:10.1016/j.jallcom.2011.05.077  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:22  AU: Puli, Venkata Sreenivas;Kumar, A.;Panwar, N.;Panwar, I. C.;Katiyar, R. S.;
7:2:1:96     Effect of structural transition on magnetic and optical properties of Ca and Ti co-substituted BiFeO3 ceramics
DOI:10.1016/j.jallcom.2013.09.107  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:17  AU: Kumar, Pawan;Kar, Manoranjan;
7:2:1:97     A Novel Approach to Improve Properties of BiFeO3 Nanomultiferroics
DOI:10.1111/jace.12782  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Arya, Ghanshyam;Kotnala, Ravinder K.;Negi, Nainjeet Singh;
7:2:1:98     Improved multiferroic properties and a novel magnetic behavior of Bi0.8La0.2Fe1-xCoxO3 nanoparticles
DOI:10.1016/j.jmmm.2010.05.045  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:22  AU: Qian, F. Z.;Jiang, J. S.;Jiang, D. M.;Wang, C. M.;Zhang, W. G.;
7:2:1:99     Structural and magnetic properties in Bi1-xRxFeO3 (x=0-1, R=La, Nd, Sm, Eu and Tb) polycrystalline ceramics
DOI:10.1016/j.jmmm.2010.02.020  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:48  AU: Zhang, Yu-jie;Zhang, Hong-guo;Yin, Jin-hua;Zhang, Hong-wei;Chen, Jing-lan;Wang, Wen-quan;Wu, Guang-heng;
7:2:1:100     Structure, ferromagnetism and microwave absorption properties of La substituted BiFeO3 nanoparticles
DOI:10.1016/j.matlet.2013.08.061  JN:MATERIALS LETTERS  PY:2013
  TC:8  AU: Li, Yong;Yang, Hui-Jing;Yang, Wei-Guang;Hou, Zhi-Ling;Li, Jing-Bo;Jin, Hai-Bo;Yuan, Jie;Cao, Mao-Sheng;
7:2:1:101     Magnetic, magnetocapacitance and dielectric properties of Cr doped bismuth ferrite nanoceramics
DOI:10.1016/j.mseb.2010.11.012  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:26  AU: Kumar, Amit;Yadav, K. L.;
7:2:1:102     Enhancement of magnetic and ferroelectric properties of BiFeO3 by Er and transition element (Mn, Co) co-doping
DOI:10.1016/j.mseb.2014.05.012  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:2  AU: Han, Yumin;Mao, Weiwei;Quan, Chuye;Wang, Xingfu;Yang, Jianping;Yang, Tao;Li, Xing'ao;Huang, Wei;
7:2:1:103     Improved magnetic and piezoresponse behavior of cobalt substituted BiFeO3 thin film
DOI:10.1016/j.tsf.2012.06.079  JN:THIN SOLID FILMS  PY:2012
  TC:6  AU: Coondoo, Indrani;Panwar, Neeraj;Tomar, Amit;Bdikin, Igor;Kholkin, A. L.;Puli, Venkata S.;Katiyar, Ram S.;
7:2:1:104     Structure, microstructure, ferroelectric/electromechanical properties and retention characteristics of [Bi1-x Nb (x) ]FeO3 thin films
DOI:10.1007/s00339-012-7104-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:3  AU: Simoes, A. Z.;Cavalcante, L. S.;Moura, F.;Batista, N. C.;Longo, E.;Varela, J. A.;
7:2:1:105     Electron spin resonance probed suppressing of the cycloidal spin structure in doped bismuth ferrites
DOI:10.1063/1.3451463  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Lin, J. W.;Tang, Y. H.;Lue, C. S.;Lin, J. G.;
7:2:1:106     Migration Kinetics of Oxygen Vacancies in Mn-Modified BiFeO3 Thin Films
DOI:10.1021/am2003747  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2011
  TC:17  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:1:107     A Method to Improve Electrical Properties of BiFeO3 Thin Films
DOI:10.1021/am300236j  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:18  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:1:108     Role of Sr2+ substitution on structural, thermal and conducting behavior of Bi1-xSrxFeO3 (0.40 <= x <= 0.55)
DOI:10.1016/j.ceramint.2014.07.077  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Thakur, Samita;Pandey, O. P.;Singh, K.;
7:2:1:109     Solid solutions of La-doped BiFeO3 obtained by the Pechini method with improvement in their properties
DOI:10.1016/j.ceramint.2014.01.143  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Garcia-Zaleta, D. S.;Torres-Huerta, A. M.;Dominguez-Crespo, M. A.;Matutes-Aquino, J. A.;Gonzalez, A. M.;Villafuerte-Castrejon, M. E.;
7:2:1:110     Magnetic annealing effects on multiferroic BiFeO3/CoFe2O4 bilayered films
DOI:10.1016/j.jallcom.2011.01.143  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:19  AU: Tang, Xianwu;Dai, Jianming;Zhu, Xuebin;Song, Wenhai;Sun, Yuping;
7:2:1:111     Structural, optical and transport properties of Al3+ doped BiFeO3 nanopowder synthesized by solution combustion method
DOI:10.1016/j.jallcom.2010.11.153  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:29  AU: Azam, Ameer;Jawad, Ali;Ahmed, Arham S.;Chaman, M.;Naqvi, A. H.;
7:2:1:112     Structure, ferroelectric and piezoelectric properties of multiferroic Bi0.875Sm0.125FeO3 ceramics
DOI:10.1016/j.jallcom.2012.06.094  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:11  AU: Chen, Xiaomin;Wang, Junling;Yuan, Guoliang;Wu, Di;Liu, Junming;Yin, Jiang;Liu, Zhiguo;
7:2:1:113     Evidence of improved ferroelectric phase stabilization in Nd and Sc co-substituted BiFeO3
DOI:10.1063/1.4898805  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Rao, T. Durga;Asthana, Saket;
7:2:1:114     Enhanced magnetic and conductive properties of Ba and Co co-doped BiFeO3 ceramics
DOI:10.1016/j.jmmm.2013.12.036  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:17  AU: Xi, X. J.;Wang, S. Y.;Liu, W. F.;Wang, H. J.;Guo, Feng;Wang, Xu;Gao, J.;Li, D. J.;
7:2:1:115     Structural and magnetic properties of single-phase Bi0.9Eu0.1Fe0.95Co0.05O3 and Bi0.9Eu0.05La0.05Fe0.95Co0.05O3 nanoparticles
DOI:10.1016/j.matlet.2012.02.082  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Mao, Weiwei;Li, Xing'ao;Li, Yongtao;Li, Peng;Bao, Gang;Yang, Tao;Yang, Jianping;
7:2:1:116     Multiferroic properties of Bi0.85Pr0.15Fe0.9Co0.1O3 thin films
DOI:10.1016/j.matlet.2013.05.029  JN:MATERIALS LETTERS  PY:2013
  TC:5  AU: Yang, Haibo;Liu, Miao;Lin, Ying;Yang, Yanyan;
7:2:1:117     Low temperature step magnetization and magnetodielectric study in Bi0.95La0.05Fe1-xZrxO3 ceramics
DOI:10.1016/j.matchemphys.2012.03.013  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:16  AU: Kumar, Amit;Yadav, K. L.;Rani, Jyoti;
7:2:1:118     Room temperature multiferroic properties of (Bi0.95La0.05)(Fe0.97Mn0.03)O-3/NiFe2O4 double layered thin film
DOI:10.1016/j.materresbull.2013.08.001  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:9  AU: Raghavan, C. M.;Kim, H. J.;Kim, J. W.;Kim, S. S.;
7:2:1:119     Annealing temperature mediated physical properties of bismuth ferrite (BiFeO3) nanostructures synthesized by a novel wet chemical method
DOI:10.1016/j.materresbull.2013.04.008  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:16  AU: Sakar, M.;Balakumar, S.;Saravanan, P.;Jaisankar, S. N.;
7:2:1:120     Multiferroic properties of (Bi1-xPrx)(Fe0.95Mn0.05)O-3 thin films
DOI:10.1016/j.mseb.2011.05.031  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:20  AU: Wen, Zheng;You, Lu;Shen, Xuan;Li, Xuefei;Wu, Di;Wang, Junling;Li, Aidong;
7:2:1:121     Enhanced multiferroic properties and tunable magnetic behavior in multiferroic BiFeO3-Bi0.5Na0.5TiO3 solid solutions
DOI:10.1016/j.mseb.2011.07.012  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:16  AU: Tian, Z. M.;Zhang, Y. S.;Yuan, S. L.;Wu, M. S.;Wang, C. H.;Ma, Z. Z.;Huo, S. X.;Duan, H. N.;
7:2:1:122     Studies on structural, electrical and optical properties of multiferroic (Ag, Ni and In) codoped Bi0.9Nd0.1FeO3 thin films
DOI:10.1016/j.apsusc.2013.12.037  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:2  AU: Xue, Xu;Tan, Guoqiang;Dong, Guohua;Liu, Wenlong;Ren, Huijun;
7:2:1:123     Structural and electrical properties of (Bi0.9Dy0.1)(Fe0.975TM0.025)O-3 (+/-) (delta) (TM=Ni2+, Cr3+ and Ti4+) thin films
DOI:10.1016/j.ceramint.2013.01.022  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Raghavan, C. M.;Kim, E. S.;Kim, J. W.;Kim, S. S.;
7:2:1:124     Structural and Magnetic Properties of Bismuth Ferrite Nanopowders Prepared via Sol-Gel Method
DOI:10.1080/00150193.2014.875435  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Fu, Chunlin;Long, Xianliang;Cai, Wei;Chen, Gang;Deng, Xiaoling;
7:2:1:125     Synthesis and study of multiferroic properties of ZnFe2O4-BiFeO3 nanocomposites
DOI:10.1016/j.jallcom.2009.10.275  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:17  AU: Uniyal, Poonam;Yadav, K. L.;
7:2:1:126     Room temperature structure and multiferroic properties in Bi0.7La0.3FeO3 ceramics
DOI:10.1016/j.jallcom.2012.11.018  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:9  AU: Carvalho, T. T.;Fernandes, J. R. A.;Perez de la Cruz, J.;Vidal, J. V.;Sobolev, N. A.;Figueiras, F.;Das, S.;Amaral, V. S.;Almeida, A.;Agostinho Moreira, J.;Tavares, P. B.;
7:2:1:127     Crystal structure transformation, dielectric and magnetic properties of Ba and Co modified BiFeO3 multiferroic
DOI:10.1016/j.jallcom.2014.01.103  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Godara, Priyanka;Agarwal, Ashish;Ahlawat, Neetu;Sanghi, Sujata;Dahiya, Reetu;
7:2:1:128     Structure-property relationship of GdCrO3-modified BiFeO3 ceramics
DOI:10.1016/j.jallcom.2014.05.050  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Zhang, Xingquan;Sui, Yu;Wang, Xianjie;Xie, Ruishi;
7:2:1:129     Individual-Layer Thickness Effects on the Preferred c-Axis-Oriented BiFeO3 Films by Chemical Solution Deposition
DOI:10.1111/j.1551-2916.2010.03622.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Tang, Xianwu;Dai, Jianmin;Zhu, Xuebin;Yin, Lihua;Ang, Ran;Song, Wenhai;Yang, Zhaorong;Sun, Yuping;Zhang, Ruili;
7:2:1:130     Tailoring the Magnetic and Optical Characteristics of Nanocrystalline BiFeO3 by Ce Doping
DOI:10.1111/j.1551-2916.2012.05132.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:27  AU: Bhushan, Bhavya;Wang, Zhenxing;Tol, Johan;Dalal, Naresh S.;Basumallick, Amitava;Vasanthacharya, Nagasampagi Y.;Kumar, Sanjay;Das, Dipankar;
7:2:1:131     Enhanced ferroelectric, magnetoelectric, and magnetic properties in Pr and Cr co-doped BiFeO3 nanotubes fabricated by template assisted route
DOI:10.1063/1.4721810  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Das, Rajasree;Khan, Gobinda Gopal;Mandal, Kalyan;
7:2:1:132     Structural transformation and enhancement in magnetic properties of single-phase Bi1-xPrxFeO3 nanoparticles
DOI:10.1063/1.4807928  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:15  AU: Srivastav, Simant Kumar;Gajbhiye, N. S.;Banerjee, A.;
7:2:1:133     Magnetoelectric coupling effect in transition metal modified polycrystalline BiFeO3 thin films
DOI:10.1016/j.jmmm.2014.05.050  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Puli, Venkata Sreenivas;Pradhan, Dhiren Kumar;Gollapudi, Sreenivasulu;Coondoo, Indrani;Panwar, Neeraj;Adireddy, Shiva;Chrisey, Douglas B.;Katiyar, Ram S.;
7:2:1:134     Improved Ferroelectric and Leakage Properties of Ce Doped in BiFeO3 Thin Films
DOI:10.1155/2014/509408  JN:JOURNAL OF NANOMATERIALS  PY:2014
  TC:0  AU: Bai, Alima;Zhao, Shifeng;Chen, Jieyu;
7:2:1:135     Structural phase transition and multiferroic properties of single-phase Bi1-xErxFe0.95Co0.05O3
DOI:10.1016/j.matlet.2013.01.099  JN:MATERIALS LETTERS  PY:2013
  TC:10  AU: Mao, Weiwei;Li, Xing'ao;Li, Yongtao;Wang, Xiwang;Wang, Yufeng;Ma, Yanwen;Feng, Xiaomiao;Yang, Tao;Yang, Jianping;
7:2:1:136     Optimization of the multiferroic BiFeO3 thin films by divalent ion (Mn, Ni) co-doping at B-sites
DOI:10.1016/j.matlet.2013.12.039  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Dong, Guohua;Tan, Guoqiang;Luo, Yangyang;Liu, Wenlong;Ren, Huijun;Xia, Ao;
7:2:1:137     Structural, dielectric, magnetic, magnetodielectric and impedance spectroscopic studies of multiferroic BiFeO3-BaTiO3 ceramics
DOI:10.1016/j.mseb.2011.01.010  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:34  AU: Singh, Hemant;Kumar, Amit;Yadav, K. L.;
7:2:1:138     Reduced Coercive Field in BiFeO3 Thin Films Through Domain Engineering
DOI:10.1002/adma.201000807  JN:ADVANCED MATERIALS  PY:2011
  TC:23  AU: Shelke, Vilas;Mazumdar, Dipanjan;Srinivasan, Gopalan;Kumar, Amit;Jesse, Stephen;Kalinin, Sergei;Baddorf, Arthur;Gupta, Arunava;
7:2:1:139     Comparative study on aging effect in BiFeO3 thin films substituted at A- and B-sites
DOI:10.1063/1.3672212  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Wang, Xi;Hu, Guangda;Cheng, Ling;Yang, Changhong;Wu, Weibing;
7:2:1:140     Effect of Dy-substitution on structural, electrical and magnetic properties of multiferroic BiFeO3 ceramics
DOI:10.1016/j.ceramint.2013.12.148  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:10  AU: Pattanayak, Samita;Choudhary, R. N. P.;Das, Piyush R.;Shannigrahi, S. R.;
7:2:1:141     Investigation of Tb-doping on structural transition and multiferroic properties of BiFeO3 thin films
DOI:10.1016/j.ceramint.2013.11.089  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:8  AU: Dong, Guohua;Tan, Guoqiang;Luo, Yangyang;Liu, Wenlong;Ren, Huijun;Xia, Ao;
7:2:1:142     Effect of Ba doping on magnetic and dielectric properties of nanocrystalline BiFeO3 at room temperature
DOI:10.1016/j.jallcom.2010.07.193  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:27  AU: Yang, Chou;Jiang, Ji-Sen;Qian, Fang-Zhen;Jiang, Dong-Mei;Wang, Chun-Mei;Zhang, Wei-Guo;
7:2:1:143     Pyroelectric properties and electrical conductivity in samarium doped BiFeO3 ceramics
DOI:10.1016/j.jallcom.2012.02.182  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:16  AU: Yao, Y. B.;Liu, W. C.;Mak, C. L.;
7:2:1:144     In situ magnetic annealing effects on multiferroic Mn-doped BiFeO3 thin films
DOI:10.1016/j.jallcom.2012.10.044  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:12  AU: Tang, Xianwu;Dai, Jianming;Zhu, Xuebin;Sun, Yuping;
7:2:1:145     Structural, dielectric and magnetic properties of Bi1-xYxFeO3 (0 <= x <= 0.2) obtained by acid-base co-precipitation
DOI:10.1016/j.jallcom.2013.12.243  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Saleh Medina, Leila Maria;Jorge, Guillermo A.;Martin Negri, R.;
7:2:1:146     Enhanced dielectric and ferroelectric properties of Ba and Ti co-doped BiFeO3 multiferroic ceramics
DOI:10.1016/j.jallcom.2013.07.187  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:9  AU: Deng, Haoliang;Zhang, Ming;Hu, Zhou;Xie, Qunfeng;Zhong, Qi;Wei, Jizhou;Yan, Hui;
7:2:1:147     Nonstoichiometric BiFe0.9Ti0.05O3 multiferroic ceramics with ultrahigh electrical resistivity
DOI:10.1063/1.3506526  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:16  AU: Gu, Yan Hong;Wang, Yu;Chen, Feng;Chan, Helen Lai Wah;Chen, Wan Ping;
7:2:1:148     Observation of room temperature saturated ferroelectric polarization in Dy substituted BiFeO3 ceramics
DOI:10.1063/1.3702405  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:21  AU: Zhang, Shuxia;Wang, Lei;Chen, Yao;Wang, Dongliang;Yao, Yingbang;Ma, Yanwei;
7:2:1:149     Optimization of excess Bi doping to enhance ferroic orders of spin casted BiFeO3 thin film
DOI:10.1063/1.4884680  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Gupta, Surbhi;Tomar, Monika;Gupta, Vinay;James, A. R.;Pal, Madhuparna;Guo, Ruyan;Bhalla, Amar;
7:2:1:150     Giant magnetodielectric and enhanced multiferroic properties of Sm doped bismuth ferrite nanoparticles
DOI:10.1039/c4tc00591k  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:10  AU: Mukherjee, Ayan;Basu, Soumen;Manna, P. K.;Yusuf, S. M.;Pal, Mrinal;
7:2:1:151     Effects of La content on the magnetic, electric and structural properties of BiFeO3
DOI:10.1016/j.jmmm.2013.10.020  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:8  AU: Basiri, M. H.;Shokrollahi, H.;Isapour, Gh.;
7:2:1:152     Multiferroic properties of Tb-doped BiFeO3 nanowires
DOI:10.1007/s11051-013-1553-1  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:14  AU: Lotey, Gurmeet Singh;Verma, N. K.;
7:2:1:153     Structural, morphological and multiferroic properties of Pr and Co co-substituted BiFeO3 nanoparticles
DOI:10.1016/j.matlet.2012.09.038  JN:MATERIALS LETTERS  PY:2013
  TC:13  AU: Li, Xing'ao;Wang, Xiwang;Li, Yongtao;Mao, Weiwei;Li, Peng;Yang, Tao;Yang, Jianping;
7:2:1:154     Structural, optical and magnetic properties of BiFe1-xCoxO3 thin films
DOI:10.1016/j.matlet.2014.04.172  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Xue, Xu;Tan, Guoqiang;Liu, Wenlong;Hao, Hangfei;
7:2:1:155     Effect of Nb substitution on the structural, dielectric and magnetic properties of multiferroic BiFe1-xNbxO3 ceramics
DOI:10.1016/j.matchemphys.2011.08.058  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:14  AU: Singh, Hemant;Yadav, K. L.;
7:2:1:156     Effects of ion-doping at different sites on multiferroic properties of BiFeO3 thin films
DOI:10.1007/s00339-010-5965-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:13  AU: Liu, Jun;Li, Meiya;Hu, Zhongqiang;Pei, Ling;Wang, Jing;Liu, Xiaolian;Zhao, Xingzhong;
7:2:1:157     Structure and multiferroic properties of Eu-substituted BiFeO3 ceramics
DOI:10.1007/s00339-012-7311-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:8  AU: Dai, Haiyang;Chen, Zhenping;Xue, Renzhong;Li, Tao;Liu, Haizeng;Wang, Yongqiang;
7:2:1:158     Structural and electric properties of polycrystalline Bi1-xErxFeO3 ceramics
DOI:10.1016/j.ceramint.2012.12.043  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Dai, Haiyang;Chen, Zhenping;Xue, Renzhong;Li, Tao;Chen, Jing;Xiang, Huiwen;
7:2:1:159     Structural and ferroelectric properties of chemical solution deposited (Nd, Cu) co-doped BiFeO3 thin film
DOI:10.1016/j.ceramint.2012.10.182  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:14  AU: Raghavan, C. M.;Kim, J. W.;Kim, S. S.;
7:2:1:160     Effect of Eu, Ti co-doping on the structural and multiferroic properties of BiFeO3 ceramics
DOI:10.1016/j.ceramint.2014.07.080  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Dai, Haiyang;Xue, Renzhong;Chen, Zhenping;Li, Tao;Chen, Jing;Xiang, Huiwen;
7:2:1:161     Compositional dependence of dielectric and ferroelectric properties in BiFeO3-BaTiO3 solid solutions
DOI:10.1016/j.ceramint.2013.09.020  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:10  AU: Zhang, Hailong;Jo, Wook;Wang, Ke;Webber, Kyle G.;
7:2:1:162     High stable dielectric permittivity and low dielectric loss in sol-gel derived BiFeO3 thin films
DOI:10.1016/j.ceramint.2013.07.051  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:12  AU: Ren, Yinjuan;Zhu, Xiaohong;Zhang, Caiyan;Zhu, Jiliang;Zhu, Jianguo;Xiao, Dingquan;
7:2:1:163     Multiferroic properties and converse magnetoelectric effect in Bi1-xCaxFeO3 ceramics
DOI:10.1016/j.jallcom.2010.07.129  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:13  AU: Chen, Shuiyuan;Wang, Liaoyu;Xuan, Haicheng;Zheng, Yanxia;Wang, Dunhui;Wu, Jun;Du, Youwei;Huang, Zhigao;
7:2:1:164     Lanthanum doped BiFeO3 powders: Syntheses and characterization
DOI:10.1016/j.jallcom.2010.04.049  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:22  AU: Gonzalez Garcia, F.;Riccardi, C. S.;Simoes, A. Z.;
7:2:1:165     Particle size dependent magnetic properties and phase transitions in multiferroic BiFeO3 nano-particles
DOI:10.1016/j.jallcom.2012.07.098  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:20  AU: Reddy, V. Annapu;Pathak, N. P.;Nath, R.;
7:2:1:166     Multiferroic properties of Y-doped BiFeO3
DOI:10.1016/j.jallcom.2012.06.106  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:9  AU: Luo, Lirong;Wei, Wei;Yuan, Xueyong;Shen, Kai;Xu, Mingxiang;Xu, Qingyu;
7:2:1:167     Enhanced magnetoelectric properties in Bi0.95Ho0.05FeO3 polycrystalline ceramics
DOI:10.1016/j.jallcom.2011.09.012  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:13  AU: Uniyal, Poonam;Yadav, K. L.;
7:2:1:168     Structural phase transition and thermal expansion in Bi1-2.5xPr1.5xBaxFeO3 ceramics
DOI:10.1016/j.jallcom.2013.02.138  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Cheng, G. F.;Ruan, Y. J.;Huang, Y. H.;Wu, X. S.;
7:2:1:169     Observation of high coercivity in multiferroic lanthanum doped BiFeO3
DOI:10.1016/j.jallcom.2012.11.129  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:12  AU: Suresh, Pittala;Srinath, S.;
7:2:1:170     Evidences of magneto-electric coupling in BFO-BT solid solutions
DOI:10.1016/j.jallcom.2013.04.044  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:12  AU: Kumar, Manish;Shankar, S.;Kotnala, R. K.;Parkash, Om;
7:2:1:171     Study of structural, electrical, magnetic and optical properties of 0.65BaTiO(3)-0.35Bi(0.5)Na(0.5)TiO(3)-BiFeO3 multiferroic composite
DOI:10.1016/j.jallcom.2014.01.059  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Rawat, Meera;Yadav, K. L.;
7:2:1:172     Effects of Dy and Mn Codoping on Ferroelectric Properties of BiFeO3 Thin Films
DOI:10.1111/j.1551-2916.2011.04720.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:14  AU: Do, Dalhyun;Kim, Jin Won;Kim, Sang Su;
7:2:1:173     Size and Lone Pair Effects on the Multiferroic Properties of Bi(0.75)A(0.25)FeO(3-delta) (A = Sr, Pb, and Ba) Ceramics
DOI:10.1111/jace.12458  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Hussain, Shahzad;Hasanain, S. Khurshid;Jaffari, G. Hassnain;Faridi, Sabeen;Rehman, Foqia;Abbas, Turab Ali;Shah, S. Ismat;
7:2:1:174     Influence of Zr doping on the structure and ferroelectric properties of BiFeO3 thin films
DOI:10.1063/1.3436593  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:20  AU: Mukherjee, Somdutta;Gupta, Rajeev;Garg, Ashish;Bansal, Vipul;Bhargava, Suresh;
7:2:1:175     Cluster spin glass behavior in Bi(Fe0.95Co0.05)O-3
DOI:10.1063/1.3406150  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:16  AU: Xu, Qingyu;Zhou, Shengqiang;Wu, D.;Uhlarz, Marc;Tang, Y. K.;Potzger, Kay;Xu, M. X.;Schmidt, Heidemarie;
7:2:1:176     Rietveld analysis, dielectric and magnetic properties of Sr and Ti codoped BiFeO3 multiferroic
DOI:10.1063/1.3646557  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Reetu;Agarwal, Ashish;Sanghi, Sujata;Ashima;
7:2:1:177     Effect of Y-doping on the electrical transport properties of nanocrystalline BiFeO3
DOI:10.1063/1.4734005  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Mukherjee, A.;Basu, S.;Chakraborty, G.;Pal, M.;
7:2:1:178     Magnetic enhancement across a ferroelectric-antiferroelectric phase boundary in Bi1-xNdxFeO3
DOI:10.1063/1.3693531  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:22  AU: Wu, Yu-Jie;Chen, Xiao-Kun;Zhang, Jing;Chen, Xiao-Jia;
7:2:1:179     Structural and multiferroic properties of Bi1-xInxFeO3 (0 <= x <= 0.20) nanoparticles
DOI:10.1063/1.4788668  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Arya, G. S.;Kotnala, R. K.;Negi, N. S.;
7:2:1:180     Enhanced ferromagnetic properties in Ho and Ni co-doped BiFeO3 ceramics
DOI:10.1063/1.4860296  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:6  AU: Park, J. S.;Yoo, Y. J.;Hwang, J. S.;Kang, J. -H.;Lee, B. W.;Lee, Y. P.;
7:2:1:181     Hydrothermal synthesis and characterization of multiferroic Bi1-xLaxFeO3 crystallites
DOI:10.1016/j.jeurceramsoc.2009.06.016  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:22  AU: Yan, Xiaolong;Chen, Jianguo;Qi, Yufa;Cheng, Jinrong;Meng, Zhongyan;
7:2:1:182     The study of BiCrxFe1-xO3 thin films synthesized by sol-gel technique
DOI:10.1016/j.jeurceramsoc.2009.05.005  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:14  AU: Zhang, Yuhua;Yu, Shengwen;Cheng, Jinrong;
7:2:1:183     Mn-Substitution Effect on Thermal Conductivity of Delafossite-Type Oxide CuFeO2
DOI:10.1007/s11664-010-1135-2  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2010
  TC:14  AU: Nozaki, T.;Hayashi, K.;Kajitani, T.;
7:2:1:184     Magnetic and dielectric properties of alkaline earth Ca2+ and Ba2+ ions co-doped BiFeO3 nanoparticles
DOI:10.1016/j.jmmm.2011.11.033  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:12  AU: Yang, C.;Liu, C. Z.;Wang, C. M.;Zhang, W. G.;Jiang, J. S.;
7:2:1:185     Ce-doped bismuth ferrite thin films with improved electrical and functional properties
DOI:10.1007/s10853-014-8243-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:5  AU: Gupta, Surbhi;Tomar, Monika;James, A. R.;Gupta, Vinay;
7:2:1:186     Enhanced magnetic and magnetoelectric properties of In and Co codoped BiFeO3 nanoparticles at room temperature
DOI:10.1007/s11051-013-2155-7  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:1  AU: Arya, G. S.;Kotnala, R. K.;Negi, N. S.;
7:2:1:187     Structural and magnetic properties of Er-doped BiFeO3 nanoparticles
DOI:10.1007/s11051-013-1969-7  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:3  AU: Zhao, Jianguo;Liu, Shijiang;Zhang, Weiying;Liu, Zhaojun;Liu, Zhongli;
7:2:1:188     Room-temperature magnetic studies of La-modified BiFeO3 ceramic
DOI:10.1016/j.matlet.2011.03.043  JN:MATERIALS LETTERS  PY:2011
  TC:20  AU: Sen, K.;Thakur, Sangeeta;Singh, K.;Gautam, Ashish;Singh, M.;
7:2:1:189     Structural, magnetic and optical properties of Bi1-xDyxFeO3 nanoparticles synthesized by sol-gel method
DOI:10.1016/j.matlet.2012.12.114  JN:MATERIALS LETTERS  PY:2013
  TC:14  AU: Arora, Manisha;Sati, P. C.;Chauhan, Sunil;Singh, Hemant;Yadav, K. L.;Chhoker, Sandeep;Kumar, Manoj;
7:2:1:190     Influence of multi-element co-doping on structure and multiferroic properties of BiFeO3 thin films
DOI:10.1016/j.matlet.2014.08.032  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Dong, Guohua;Tan, Guoqiang;Luo, Yangyang;Liu, Wenlong;Ren, Huijun;Xia, Ao;
7:2:1:191     Structural, magnetic and optical properties of Ho-Co codoped BiFeO3 nanoparticles
DOI:10.1016/j.matlet.2014.05.110  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Arora, Manisha;Sati, Prakash Chandra;Chauhan, Sunil;Kumar, Manoj;Chhoker, Sandeep;
7:2:1:192     The superior multiferroic properties of Bi0.85Nd0.15Fe0.98Mn0.02O3/CoFe2O4 heterostructure thin film at room temperature
DOI:10.1016/j.matlet.2014.04.082  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Dong, Guohua;Tan, Guoqiang;Luo, Yangyang;Liu, Wenlong;Ren, Huijun;Xia, Ao;
7:2:1:193     The oxygen permeation characteristics of Bi-1 (-) xSrxFeO3 mixed ionic and electronic conducting ceramics
DOI:10.1016/j.ssi.2009.11.016  JN:SOLID STATE IONICS  PY:2010
  TC:19  AU: Brinkman, K.;Iijima, T.;Takamura, H.;
7:2:1:194     Large and stable piezoelectric response in Bi0.97Nd0.03FeO3 thin film
DOI:10.1063/1.4705427  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Jiang, Bo;Li, Xiaolong;Zhang, Hongyan;Sun, Wen;Liu, Jingjing;Hu, Guangda;
7:2:1:195     Effects of (Dy, Zn) co-doping on structural and electrical properties of BiFeO3 thin films
DOI:10.1016/j.ceramint.2013.07.148  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:9  AU: Raghavan, C. M.;Kim, J. W.;Kim, S. S.;
7:2:1:196     Evidence of spin-two phonon coupling and improved multiferroic behavior of Bi1-xDyxFeO3 nanoparticles
DOI:10.1016/j.ceramint.2014.05.049  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Arora, Manisha;Chauhan, Sunil;Sati, P. C.;Kumar, Manoj;Chhoker, Sandeep;
7:2:1:197     Effect of Sm-Substitution on Structural, Electrical and Magnetic Properties of BiFeO3
DOI:10.1007/s13391-013-3050-1  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:11  AU: Pattanayak, Samita;Choudhary, R. N. P.;Das, Piyush R.;
7:2:1:198     Effect of Sintering Temperature on the Microstructures and Ferroelectric Properties of Bismuth Ferrite Ceramics
DOI:10.1080/00150193.2013.814474  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Fu, Chunlin;Long, Xianliang;Cai, Wei;Chen, Gang;Deng, Xiaoling;
7:2:1:199     Multiferroic properties of BiFeO3 doped Bi(MgTi)O-3-PbTiO3 ceramic system
DOI:10.1016/j.jallcom.2010.07.080  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Rai, Radheshyam;Kholkin, Andrei L.;Sharma, Seema;
7:2:1:200     Processing and characterization of Sr doped BiFeO3 multiferroic materials by high energetic milling
DOI:10.1016/j.jallcom.2011.03.132  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Moure, A.;Tartaj, J.;Moure, C.;
7:2:1:201     Multiferroic properties in BiFe1-xZnxO3 (x=0.1-0.2) ceramics by solution combustion method ( SCM)
DOI:10.1016/j.jallcom.2011.12.122  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Chaudhari, Y. A.;Singh, A.;Abuassaj, E. M.;Chatterjee, R.;Bendre, S. T.;
7:2:1:202     Enhanced magnetocapacitance sensitivity in BiFeO3-poly(vinylidene-fluoride) hot pressed composite films
DOI:10.1016/j.jallcom.2012.02.125  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Kumar, Amit;Yadav, K. L.;
7:2:1:203     Exploring the dielectric behaviour of nano-structured Al3+ doped BiFeO3 ceramics synthesized by auto ignition process
DOI:10.1016/j.jallcom.2012.01.075  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:14  AU: Jawad, Ali;Ahmed, Arham S.;Ashraf, S. S. Z.;Chaman, M.;Azam, Ameer;
7:2:1:204     Enhanced magnetodielectric properties of single-phase Bi0.95-xLa0.05LuxFeO3 multiferroic system
DOI:10.1016/j.jallcom.2012.11.189  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Kumar, Amit;Yadav, K. L.;
7:2:1:205     Enhanced Room Temperature Multiferroic Properties of (Bi0.95La0.05)(Fe0.97Mn0.03)O3/CoFe2O4 and CoFe2O4/(Bi0.95La0.05)(Fe0.97Mn0.03)O3 Double-Layered Thin Films
DOI:10.1111/j.1551-2916.2012.05435.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Raghavan, Chinnambedu Murugesan;Kim, Jin Won;Kim, Hae Jin;Kim, Won Jeong;Kim, Sang Su;
7:2:1:206     Multiferroic properties of Bi0.9Gd0.1Fe0.9Mn0.1O3 thin film
DOI:10.1063/1.3283919  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:21  AU: Lahmar, A.;Habouti, S.;Solterbeck, C-H.;Dietze, M.;Es-Souni, M.;
7:2:1:207     Structural, magnetic, and optical properties of Pr and Zr codoped BiFeO3 multiferroic ceramics
DOI:10.1063/1.4761968  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:24  AU: Sati, Prakash Chandra;Arora, Manisha;Chauhan, Sunil;Chhoker, Sandeep;Kumar, Manoj;
7:2:1:208     High temperature magnetic behavior of multiferroics Bi1-xCaxFeO3
DOI:10.1063/1.4869402  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhang, N.;Su, J.;Liu, Z. Y.;Fu, Z. M.;Wang, X. W.;Song, G. L.;Chang, F. G.;
7:2:1:209     Ferroelectric and magnetic properties of magnetoelectric (Na0.5Bi0.5)TiO3-BiFeO3 synthesized by acetic acid assisted sol-gel method
DOI:10.1016/j.jeurceramsoc.2014.06.027  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Ramana, E. Venkata;Mahajan, A.;Graca, M. P. F.;Srinivas, A.;Valente, M. A.;
7:2:1:210     Defect driven multiferroicity in Gd doped BiFeO3 at room temperature
DOI:10.1016/j.jmmm.2010.07.001  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:18  AU: Pradhan, S. K.;Das, J.;Rout, P. P.;Das, S. K.;Mishra, D. K.;Sahu, D. R.;Pradhan, A. K.;Srinivasu, V. V.;Nayak, B. B.;Verma, S.;Roul, B. K.;
7:2:1:211     Structural distortion and room-temperature ferromagnetization of Co-doped and (Eu, Co)-codoped BiFeO3 nanoparticles
DOI:10.1016/j.matlet.2012.07.043  JN:MATERIALS LETTERS  PY:2012
  TC:13  AU: Li, Yongtao;Zhang, Hongguang;Li, Qi;Liu, Hao;Dong, Xueguang;Mao, Weiwei;Dong, Chenglin;Liu, Shengli;Li, Xing'ao;Wei, Shiqiang;
7:2:1:212     Effect of Pr substitution on structural and electrical properties of BiFeO3 ceramics
DOI:10.1016/j.matchemphys.2013.09.045  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:5  AU: Sharma, Poorva;Varshney, Dinesh;Satapathy, S.;Gupta, P. K.;
7:2:1:213     Structural and electrical properties of Sm-substituted BiFeO3 thin films prepared by chemical solution deposition
DOI:10.1016/j.tsf.2012.11.062  JN:THIN SOLID FILMS  PY:2013
  TC:12  AU: Singh, Sushil Kumar;
7:2:1:214     Tuning of dielectric and ferroelectric properties in single phase BiFeO3 ceramics with controlled Fe2+/Fe3+ ratio
DOI:10.1016/j.ceramint.2013.10.098  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Ke, Shanming;Lin, Peng;Zeng, Xierong;Huang, Haitao;Zhou, L. M.;Mai, Y. -W.;
7:2:1:215     Preparation of multiferroic Co substituted BiFeO3 with enhanced coercive force and its application in sorption removal of dye molecules from aqueous solution
DOI:10.1016/j.jallcom.2013.01.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:13  AU: Luo, Lirong;Shen, Kai;Xu, Qingyu;Zhou, Qin;Wei, Wei;Gondal, M. A.;
7:2:1:216     Effects of local structural distortion on magnetization in BiFeO3 with Pr, Ba co-doping
DOI:10.1063/1.3673821  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Cheng, G. F.;Huang, Y. H.;Ge, J. J.;Lv, B.;Wu, X. S.;
7:2:1:217     Ba and Ti co-doped BiFeO3 thin films via a modified chemical route with synchronous improvement in ferroelectric and magnetic behaviors
DOI:10.1063/1.4794814  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Wang, Yao;Li, Jing;Chen, Jingyi;Deng, Yuan;
7:2:1:218     Phase transformation, improved ferroelectric and magnetic properties of (1-x) BiFeO3-xPb(Zr0.52Ti0.48)O-3 solid solutions
DOI:10.1063/1.4882067  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Sharma, Subhash;Singh, Vikash;Dwivedi, R. K.;Ranjan, Rajeev;Anshul, Avneesh;Amritphale, S. S.;Chandra, Navin;
7:2:1:219     The multiferroic properties of polycrystalline Bi1-xYxFeO3 films
DOI:10.1063/1.4863261  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Sheng, Yan;Rui, Wenbin;Qiu, Xiangbiao;Du, Jun;Zhou, Shengqiang;Xu, Qingyu;
7:2:1:220     Effect of Ho substitution on structure and magnetic properties of BiFeO3
DOI:10.1063/1.4863944  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Suresh, Pittala;Babu, P. D.;Srinath, S.;
7:2:1:221     Effect of Co substitution on the magnetic properties of BiFeO3
DOI:10.1016/j.jmmm.2012.07.027  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:13  AU: Ray, J.;Biswal, A. K.;Acharya, S.;Ganesan, V.;Pradhan, D. K.;Vishwakarma, P. N.;
7:2:1:222     Study on Mn-induced Jahn-Teller distortion in BiFeO3 thin films
DOI:10.1007/s10853-014-8318-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:2  AU: Gupta, Surbhi;Tomar, Monika;Gupta, Vinay;
7:2:1:223     Unusual magnetic behaviors and electrical properties of Nd-doped BiFeO3 nanoparticles calcined at different temperatures
DOI:10.1007/s11051-013-2205-1  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:4  AU: Zhang, H.;Liu, W. F.;Wu, P.;Hai, X.;Wang, S. Y.;Liu, G. Y.;Rao, G. H.;
7:2:1:224     Enhanced electric and magnetic properties in Ce-Cr co-doped bismuth ferrite nanostructure
DOI:10.1016/j.matlet.2014.08.104  JN:MATERIALS LETTERS  PY:2014
  TC:3  AU: Godara, Sanjay;Sinha, Nidhi;Kumar, Binay;
7:2:1:225     Synthesis and characterization of Bi2Fe4O9 powders
DOI:10.1016/j.matchemphys.2011.03.011  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:11  AU: Zhao, Jingyuan;Liu, Ting;Xu, Yebin;He, Yanyan;Chen, Wanping;
7:2:1:226     Enhanced magnetoelectric sensitivity in Co0.7Zn0.3Fe2O4-Bi0.9La0.1FeO3 nanocomposites
DOI:10.1016/j.materresbull.2012.11.072  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Kumar, Amit;Yadav, K. L.;
7:2:1:227     Enhancement of magnetization and dielectric properties of chromium-doped BiFeO3 with tunable morphologies
DOI:10.1016/j.tsf.2010.03.118  JN:THIN SOLID FILMS  PY:2010
  TC:11  AU: Du, Yi;Cheng, Zhen Xiang;Dou, Shi Xue;Shahbazi, Mahboobeh;Wang, Xiao Lin;
7:2:1:228     Preparation, structural and magnetic studies on BiFe1-xCrxO3 (x=0.0, 0.05 and 0.1) multiferroic nanoparticles
DOI:10.1063/1.4799063  JN:AIP ADVANCES  PY:2013
  TC:6  AU: Layek, Samar;Saha, Santanu;Verma, H. C.;
7:2:1:229     Structural, optical, and multiferroic properties of single phased BiFeO3
DOI:10.1007/s00339-013-7712-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:12  AU: Muneeswaran, M.;Jegatheesan, P.;Gopiraman, M.;Kim, Ick-Soo;Giridharan, N. V.;
7:2:1:230     Experimental and theoretical evidence of enhanced ferromagnetism in sonochemical synthesized BiFeO3 nanoparticles
DOI:10.1063/1.3525573  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:19  AU: Fang, Liang;Liu, Jian;Ju, Sheng;Zheng, Fengang;Dong, Wen;Shen, Mingrong;
7:2:1:231     Structural, magnetic and photocatalytic properties of Sr2+-doped BiFeO3 nanoparticles based on an ultrasonic irradiation assisted self-combustion method
DOI:10.1016/j.ceramint.2012.05.051  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Wang, Ben;Wang, Shumei;Gong, Lixiu;Zhou, Zhufa;
7:2:1:232     High temperature dielectric and magnetic response of Ti and Pr doped BiFeO3 ceramics
DOI:10.1016/j.ceramint.2013.03.084  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Kumar, Virendra;Gaur, Anurag;Sharma, Neha;Shah, Jyoti;Kotnala, R. K.;
7:2:1:233     Structural and electrical properties of sol-gel-derived Al-doped bismuth ferrite thin films
DOI:10.1016/j.ceramint.2012.10.114  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Zhang, Dahua;Shi, Peng;Wu, Xiaoqing;Ren, Wei;
7:2:1:234     Effect of Mn doping on multiferroic properties in Bi0.8Ba0.2FeO3 ceramics
DOI:10.1016/j.ceramint.2013.11.029  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Deng, Haoliang;Zhang, Ming;Zhong, Qi;Wei, Jizhou;Yan, Hui;
7:2:1:235     Phase formation, microstructure and magnetic properties of (1-x)BiFeO3- (x)(0.9Pb(Mg1/3Nb2/3)O-3-0.1PbTiO(3)) system
DOI:10.1016/j.ceramint.2013.07.151  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Wongmaneerung, Rewadee;Jantaratana, Pongsakorn;Yimnirun, Rattikorn;Ananta, Supon;
7:2:1:236     Structural, dielectric and impedance spectroscopy studies in (Bi0.90R0.10)Fe0.95Sc0.05O3 [R = La, Nd] ceramics
DOI:10.1016/j.ceramint.2014.02.084  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Coondoo, Indrani;Panwar, Neeraj;Rafiq, Muhammad Asif;Puli, Venkata S.;Rafiq, Muhammad Nadeem;Katiyar, Ram S.;
7:2:1:237     Enhanced Magnetic and Electric Properties of Nanocrystalline Ce Modified BFO Thin Films
DOI:10.1080/00150193.2014.923735  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Gupta, Surbhi;Tomar, Monika;Gupta, Vinay;
7:2:1:238     Coexistence of room temperature ferroelectricity and ferrimagnetism in multiferroic BiFeO3-Bi0.5Na0.5TiO3 solid solution
DOI:10.1016/j.jallcom.2011.05.083  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Tian, Z. M.;Wang, C. H.;Yuan, S. L.;Wu, M. S.;Ma, Z. Z.;Duan, H. N.;Chen, L.;
7:2:1:239     Anomalous dielectric response with suppression in Neel temperature of Bi0.9Y0.1Fe1-xMnxO3 (0 <= x <= 0.07) ceramics
DOI:10.1016/j.jallcom.2012.11.055  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Kumar, Virendra;Gaur, Anurag;Kotnala, R. K.;
7:2:1:240     Magnetic properties and local structure of the binary elements codoped Bi1-xLaxFe0.95Mn0.05O3
DOI:10.1016/j.jallcom.2013.12.244  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Li, Yongtao;Zhang, Hongguang;Liu, Hao;Dong, Xueguang;Li, Qi;Chen, Wei;Mao, Weiwei;Li, Xing'ao;Dong, Chenglin;Ren, Shanling;
7:2:1:241     Hydrothermal Synthesis of Perovskite BiFeO3-BaTiO3 Crystallites
DOI:10.1111/j.1551-2916.2011.04839.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Qin, Hongbin;Zhang, Hailong;Zhang, Bo-Ping;Xu, Lihua;
7:2:1:242     Highly textured Sr, Nb co-doped BiFeO3 thin films grown on SrRuO3/Si substrates by rf- sputtering
DOI:10.1063/1.3610428  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Ostos, C.;Raymond, O.;Suarez-Almodovar, N.;Bueno-Baques, D.;Mestres, L.;Siqueiros, J. M.;
7:2:1:243     Phase transformation, dielectric and magnetic properties of Nb doped Bi0.8Sr0.2FeO3 multiferroics
DOI:10.1063/1.4728981  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Reetu;Agarwal, Ashish;Sanghi, Sujata;Ashima;Ahlawat, Neetu;Monica;
7:2:1:244     Effect of La substitution on structure and magnetic properties of sol-gel prepared BiFeO3
DOI:10.1063/1.4801509  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:15  AU: Suresh, Pittala;Srinath, S.;
7:2:1:245     Enhanced magnetization and improved insulating character in Eu substituted BiFeO3
DOI:10.1063/1.4869775  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Rao, T. Durga;Ranjith, R.;Asthana, Saket;
7:2:1:246     Multiferroic properties in Zn and Ni co-doped BiFeO3 ceramics by solution combustion method (SCM)
DOI:10.1016/j.jmmm.2013.08.003  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Chaudhari, Y. A.;Singh, A.;Mahajan, C. M.;Jagtap, P. P.;Abuassaj, E. M.;Chatterjee, R.;Bendre, S. T.;
7:2:1:247     Magnetoelectric coupling in multiferroic Tb-doped BiFeO3 nanoparticles
DOI:10.1016/j.matlet.2013.08.022  JN:MATERIALS LETTERS  PY:2013
  TC:8  AU: Lotey, Gurmeet Singh;Verma, N. K.;
7:2:1:248     Electron spin resonance probed enhanced magnetization and optical properties of Sm doped BiFeO3 nanoparticles
DOI:10.1016/j.matlet.2014.08.140  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Arora, Manisha;Kumar, Manoj;
7:2:1:249     Improved ferroelectric and fatigue properties in Ho doped BiFeO3 thin films
DOI:10.1016/j.matlet.2014.05.046  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Yun, Qi;Bai, Yulong;Chen, Jieyu;Gao, Wei;Bai, Alima;Zhao, Shifeng;
7:2:1:250     The magnetic properties of Bi0.9Ba0.1Fe0.81M0.09Ti0.1O3 solid solutions (M = Co, Mn, Sc, Al)
DOI:10.1016/j.materresbull.2011.07.039  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:0  AU: Shi, Chenyang;Hao, Yongmei;Tan, Yanqing;Song, Rui;
7:2:1:251     Enhancement of ferromagnetic and dielectric properties of lanthanum doped bismuth ferrite nanostructures
DOI:10.1016/j.materresbull.2011.12.034  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:11  AU: Chaudhuri, A.;Mandal, K.;
7:2:1:252     Magnetic, electrical and structural characterization of BiFeO3 nanoparticles synthesized by co-precipitation
DOI:10.1016/j.powtec.2012.12.008  JN:POWDER TECHNOLOGY  PY:2013
  TC:6  AU: Shokrollahi, H.;
7:2:1:253     Studies on electrical and multiferroic properties of chemical solution deposited (Bi0.95La0.05)(Fe0.97Cr0.03)O-3/CoFe2O4 double layered thin film capacitors
DOI:10.1016/j.tsf.2013.06.004  JN:THIN SOLID FILMS  PY:2013
  TC:4  AU: Raghavan, Chinnambedu Murugesan;Kim, Jin Won;Kim, Hae Jin;Kim, Won-Jeong;Kim, Sang Su;
7:2:1:254     Effects of external magnetic field on the morphology and magnetic property of BiFeO3 particles prepared by hydrothermal synthesis
DOI:10.1063/1.4792524  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Hou, L.;Zuo, K. H.;Sun, Q. B.;Ren, Z. M.;Zeng, Y. P.;Li, X.;
7:2:1:255     Effect of non-magnetic doping on leakage and magnetic properties of BiFeO3 thin films
DOI:10.1016/j.apsusc.2011.09.066  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:10  AU: Wei, Jie;Xue, Desheng;
7:2:1:256     Dielectric and Magnetic properties of (1-x)BiFeO3-xBa(0.8) Sr0.2TiO3 ceramics
DOI:10.1016/j.ceramint.2012.04.055  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Khelifi, H.;Zannen, M.;Abdelmoula, N.;Mezzane, D.;Maalej, A.;Khemakhem, H.;Es-Souni, M.;
7:2:1:257     Electrical properties of chemical solution deposited (Bi0.9RE0.1)(Fe0.975Cu0.025)O3-delta (RE = Ho and Tb) thin films
DOI:10.1016/j.ceramint.2012.10.060  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Kim, Jin Won;Raghavan, Chinanmbedu Murugesan;Kim, Youn-Jang;Oak, Jeong-Jung;Kim, Hae Jin;Kim, Won-Jeong;Kim, Myong Ho;Song, Tae Kwon;Kim, Sang Su;
7:2:1:258     Piezoresponse force microscopy characterization of rare-earth doped BiFeO3 thin films grown by the soft chemical method
DOI:10.1016/j.ceramint.2012.08.083  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Foschini, C. R.;Ramirez, M. A.;Simoes, S. R.;Varela, J. A.;Longo, E.;Simoes, A. Z.;
7:2:1:259     Structure and Electromagnetic Properties of Bi1-xYxFe0.95Mn0.05O3 (x=0.05, 0.075 and 0.10)
DOI:10.1080/00150193.2012.671624  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Silva, J.;Reyes, A.;Castaneda, R.;Esparza, H.;Camacho, H.;Matutes, J.;Fuentes, L.;
7:2:1:260     Study of A-site and B-site Doping on Multiferroic Properties of BFO Thin Films
DOI:10.1080/00150193.2013.842748  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Gupta, Surbhi;Tomar, Monika;James, A. R.;Gupta, Vinay;
7:2:1:261     Frequency-temperature response of Pb(Zr0.65-xCexTi0.35)O-3 ferroelectric ceramics: Impedance spectroscopic studies
DOI:10.1016/j.jallcom.2009.11.120  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Tiwari, Balgovind;Choudhary, R. N. P.;
7:2:1:262     Room temperature multiferroicity in Bi rich Fe deficient Gd doped Bi1.2Gd0.1Fe0.8O3
DOI:10.1016/j.jallcom.2010.11.129  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Pradhan, S. K.;Das, J.;Rout, P. P.;Das, S. K.;Samantray, S.;Mishra, D. K.;Sahu, D. R.;Pradhan, A. K.;Zhang, K.;Srinivasu, V. V.;Roul, B. K.;
7:2:1:263     Magneto-electric properties of Nd substituted BiFeO3 polycrystalline samples
DOI:10.1016/j.jallcom.2011.12.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Gautam, Ashish;Singh, K.;Sen, K.;Kotnala, R. K.;Singh, M.;
7:2:1:264     Experimental and numerical investigation of dielectric resonator antenna based on the BiFeO3 ceramic matrix added with Bi2O3 or PbO
DOI:10.1016/j.jallcom.2013.06.009  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Rodrigues, H. O.;Sales, A. J. M.;Pires Junior, G. F. M.;Almeida, J. S.;Silva, M. A. S.;Sombra, A. S. B.;
7:2:1:265     Fabrication, magnetic, and ferroelectric properties of multiferroic BiFeO(3) hollow nanoparticles
DOI:10.1063/1.3561377  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Du, Yi;Cheng, Zhen Xiang;Dou, Shi Xue;Attard, Darren Jon;Wang, Xiao Lin;
7:2:1:266     Structural transition and enhanced magnetization in Bi1-xYxFeO3
DOI:10.1016/j.jmmm.2011.11.030  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:12  AU: Wu, Yu-Jie;Chen, Xiao-Kun;Zhang, Jing;Chen, Xiao-Jia;
7:2:1:267     Nonmonotonic variation of magnetization in Bi0.8La0.2-xPbxFeO3 (0 <= x <= 0.2) multiferroics
DOI:10.1016/j.jmmm.2011.08.010  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:13  AU: Ge, J. J.;Xue, X. B.;Cheng, G. F.;Yang, M.;You, B.;Zhang, W.;Wu, X. S.;Hu, A.;Du, J.;Zhang, S. J.;Zhou, S. M.;Wang, Z.;Yang, B.;Sun, L.;
7:2:1:268     Effect of Tb-Mn substitution on the magnetic and electrical properties of SiFeO3 ceramics
DOI:10.1016/j.jmmm.2014.04.008  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:3  AU: Kumar, K. Saravana;Aswini, P.;Venkateswaran, C.;
7:2:1:269     Magnetoelectric investigations in La-modified bismuth layered ferroelectromagnetics
DOI:10.1016/j.matchemphys.2009.12.003  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:4  AU: Ramana, E. Venkata;Sankaram, T. Bhima;
7:2:1:270     Enhancing the magnetic characteristics of BiFeO3 nanoparticles by Ca, Ba co-doping
DOI:10.1016/j.matchemphys.2012.04.037  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:13  AU: Bhushan, B.;Das, D.;Priyam, A.;Vasanthacharya, N. Y.;Kumar, S.;
7:2:1:271     Investigation of the dielectric relaxation processes in PbZr0.65Ti0.35O3-BaFe12O19 multiferroic ceramic composites
DOI:10.1016/j.matchemphys.2014.08.059  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Guerra, J. D. S.;Silva, A. C.;M'Peko, J-C;Hernandes, A. C.;Guo, R.;Bhalla, A. S.;
7:2:1:272     Structural, electrical and magnetic properties of Bi0.825Pb0.175FeO3, and Bi0.725La0.1Pb0.175FeO3 multiferroics
DOI:10.1016/j.materresbull.2013.09.018  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:8  AU: Varshney, Dinesh;Sharma, Poorva;Satapathy, S.;Gupta, P. K.;
7:2:1:273     Effect of particle size on multiferroism of barium-doped bismuth ferrite nanoparticles
DOI:10.1016/j.mssp.2014.07.041  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:3  AU: Dhir, Gitanjali;Uniyal, Poonam;Verma, N. K.;
7:2:1:274     Positive and negative exchange bias in IrMn/NiFe bilayers
DOI:10.1016/j.tsf.2010.08.035  JN:THIN SOLID FILMS  PY:2010
  TC:6  AU: Anandakumar, S.;Rani, V. Sudha;Oh, Sunjong;Kim, CheolGi;
7:2:1:275     The effects of Mn doping on the optical properties of chemically deposited BiFeO3 thin films
DOI:10.1016/j.tsf.2014.03.012  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Yan, N.;Zhang, Y. L.;Tang, W. L.;Yang, S. H.;Chen, D. H.;
7:2:1:276     Impedance spectroscopy of Gd-doped BiFeO3 multiferroics
DOI:10.1007/s00339-012-7412-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:12  AU: Pattanayak, Samita;Parida, B. N.;Das, Piyush R.;Choudhary, R. N. P.;
7:2:1:277     Effects of Ni doping on ferroelectric and ferromagnetic properties of Bi0.75Ba0.25FeO3
DOI:10.1016/j.ceramint.2013.03.055  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Castaneda, R.;Rojas-George, G.;Silva, J.;Fuentes-Montero, M. E.;Matutes-Aquino, J. A.;Reyes-Rojas, A.;Fuentes, L.;
7:2:1:278     Structure, ferroelectric, piezoelectric and ferromagnetic properties of BiFeO3-Ba0.85Ca0.15Ti0.90Zr0.10O3 lead-free multiferroic ceramics
DOI:10.1016/j.ceramint.2013.07.014  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Lin, Dunmin;Kwok, K. W.;Chan, H. L. W.;
7:2:1:279     Multiferroic Properties of Rare-Earth Eu and Nd Doped BiFeO3 Thin Films
DOI:10.1080/00150193.2010.486252  JN:FERROELECTRICS  PY:2011
  TC:8  AU: Li, Meiya;Hu, Zhongqiang;Pei, Ling;Liu, Jun;Wang, Jing;Yu, Benfang;Zhao, Xingzhong;
7:2:1:280     Enhanced ferroelectric properties in BiFe0.95Mn0.05O3 thin films
DOI:10.1016/j.jallcom.2010.08.108  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:2  AU: Cui, Shougang;
7:2:1:281     The Synthesis of Pure-Phase Bismuth Ferrite in the Bi-Fe-O System Under Hydrothermal Conditions without a Mineralizer
DOI:10.1111/j.1551-2916.2010.03882.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Gajovic, Andreja;Sturm, Saso;Jancar, Bostjan;Santic, Ana;Zagar, Kristina;Ceh, Miran;
7:2:1:282     Bilayered BiFe0.95Mn0.05O3/Bi0.90La0.10FeO3 Thin Films with Low Ferroelectric Coercivity and Large Remanent Polarization
DOI:10.1111/j.1551-2916.2010.03661.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Wu, Jiagang;Wang, John;
7:2:1:283     Structural, dielectric, ferroelectric and piezoresponse force microscopy characterizations of bilayered Bi0.9Dy0.1FeO3/K0.5Na0.5NbO3 lead-free multiferroic films
DOI:10.1063/1.4746086  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Chen, Ling;Ren, Wei;Ye, Zuo-Guang;Tian, Aifen;Wu, Xiaoqing;Shi, Peng;
7:2:1:284     Multiferroism and magnetoelectric coupling in (PbZr0.65Ti0.35O3)(0.97)-(BaFe12O19)(0.03) ceramic composites
DOI:10.1063/1.4848998  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Guerra, J. D. S.;Pal, Madhuparna;Portugal, R. J.;Cotica, L. F.;Santos, I. A.;Guo, R.;Bhalla, A. S.;
7:2:1:285     Magnetic field annealing effects on self-oriented BiFeO3 thin films prepared by chemical solution deposition
DOI:10.1016/j.jmmm.2010.04.001  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:10  AU: Tang, Xianwu;Dai, Jianming;Zhu, Xuebin;Lei, Hechang;Yin, Lihua;Song, Wenhai;Cheng, Yulan;Wu, Dajun;Sun, Yuping;
7:2:1:286     Structural transition, magnetic and optical properties of Pr and Ti co-doped BiFeO3 ceramics
DOI:10.1016/j.jmmm.2013.09.002  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:9  AU: Singh, Vikash;Sharma, Subhash;Kumar, Manoj;Kotnala, R. K.;Dwivedi, R. K.;
7:2:1:287     Synthesis, and study of magnetic properties, of Bi1-x Cd (x) FeO3
DOI:10.1007/s10853-009-4065-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:11  AU: Bellakki, M. B.;Manivannan, V.;
7:2:1:288     Synthesis, Characterization, and Self-Organization of Dendrimer-Encapsulated HgTe Quantum Dots
DOI:10.1021/la100866z  JN:LANGMUIR  PY:2010
  TC:18  AU: Priyam, Amiya;Blumling, Daniel E.;Knappenberger, Kenneth L., Jr.;
7:2:1:289     Effect of structural transition on magnetic and dielectric properties of La and Mn co-substituted BiFeO3 ceramics
DOI:10.1016/j.matchemphys.2014.09.007  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:3  AU: Kumar, Pawan;Kar, Manoranjan;
7:2:1:290     Structural and pyroelectric properties of sol-gel derived multiferroic BFO thin films
DOI:10.1016/j.materresbull.2011.11.009  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:9  AU: Jo, Seo-Hyeon;Lee, Sung-Gap;Lee, Seung-Hwan;
7:2:1:291     Multiferroic Bi(0.7)Dy(0.3)FeO(3) thin films directly integrated on Si for integrated circuit compatible devices
DOI:10.1016/j.tsf.2010.05.060  JN:THIN SOLID FILMS  PY:2010
  TC:7  AU: Prashanthi, K.;Chalke, B. A.;Bapat, R. D.;Purandare, S. C.;Palkar, V. R.;
7:2:1:292     Mn4+:BiFeO3/Zn2+:BiFeO3 bilayered thin films of (1 1 1) orientation
DOI:10.1016/j.apsusc.2011.03.095  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:10  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:1:293     Enhancement of electrical properties of (Gd, V) co-doped BiFeO3 thin films prepared by chemical solution deposition
DOI:10.1016/j.ceramint.2012.10.061  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Kim, Youn-Jang;Kim, Jin Won;Raghavan, Chinanmbedu Murugesan;Oak, Jeong-Jung;Kim, Hae Jin;Kim, Won-Jeong;Kim, Myong Ho;Song, Tae Kwon;Kim, Sang Su;
7:2:1:294     Effects of Nd and Co co-doping on phase, microstructure and ferromagnetic properties of bismuth ferrite ceramics
DOI:10.1016/j.ceramint.2012.10.072  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Lawita, Pornchanok;Siriprapa, Pasinee;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:2:1:295     Reduced leakage current of multiferroic BiFeO3 ceramics with microwave synthesis
DOI:10.1016/j.ceramint.2013.08.088  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Reddy, V. Raghavendra;Kothari, Deepti;Upadhyay, Sanjay Kumar;Gupta, Ajay;Chauhan, N.;Awasthi, A. M.;
7:2:1:296     Structure analysis and multiferroic properties of Zr4+ doped BiFeO3 ceramics
DOI:10.1016/j.ceramint.2013.06.058  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Xie, Junjie;Feng, Chude;Pan, Xiuhong;Liu, Yan;
7:2:1:297     Effects of Process Parameter and Excess Bi2O3 on Phase Formation and Electrical Properties of BiFeO3 Ceramics
DOI:10.1080/00150193.2013.842778  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Sanjoom, Kachaporn;Rujijanagul, Gobwute;
7:2:1:298     Study of Dielectric and Ferroelectric Properties of Multiferroic BiCoxFe1-xO3 Ceramic
DOI:10.1080/10584587.2010.504126  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Sen, K.;Singh, K.;Gautam, A.;Singh, M.;
7:2:1:299     Structural and optical properties of manganese substituted nanocrystalline bismuth ferrite thin films by sol-gel process
DOI:10.1016/j.jallcom.2013.08.037  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Sharma, H. B.;Singh, Ng. Boinis;Devi, K. Nomita;Lee, J. H.;Singh, S. Bobby;
7:2:1:300     Ethanol-Assisted Hydrothermal Synthesis and Characterization of BiFeO3 Nanopowders
DOI:10.1111/jace.12296  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Chen, Zhiwu;Wu, Yongpeng;Hu, Jianqiang;
7:2:1:301     Study of structural, ferromagnetic and ferroelectric properties of nanostructured barium doped Bismuth Ferrite
DOI:10.1016/j.jmmm.2013.09.049  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:3  AU: Chaudhuri, A.;Mandal, K.;
7:2:1:302     Annealing-induced changes in the nanoscale electrical homogeneity of bismuth ferrite dielectric thin films
DOI:10.1016/j.ceramint.2011.03.029  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:1  AU: Liang, Yuan-Chang;Chen, W. S.;Hu, Chia-Yen;Huang, Chiem-Lum;Kai, W.;
7:2:1:303     Electrical behavior of Bi0.95Nd0.05FeO3 thin films grown by the soft chemical method
DOI:10.1016/j.ceramint.2014.01.090  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Destro, F. B.;Moura, F.;Foschini, C. R.;Ranieri, M. G.;Longo, E.;Simoes, A. Z.;
7:2:1:304     Sol-gel synthesis of Co-doped LiMn2O4 with improved high-rate properties for high-temperature lithium batteries
DOI:10.1016/j.ceramint.2013.09.076  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Wang, Zhenjie;Du, Junlin;Li, Zhilin;Wu, Zhu;
7:2:1:305     Structural and Electrical Characterization of La and Mn Co-Substituted Bismuth Ferrite Thin Films
DOI:10.1080/00150193.2013.822280  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Kolte, Jayant;Daryapurkar, Aatish;Apte, Prakash;Gopalan, Prakash;
7:2:1:306     Electrical Properties of (Bi0.9Ho0.1)(Fe0.975Cr0.025)O-3 Thin Films Prepared by Using a Chemical Solution Deposition
DOI:10.1080/10584587.2012.741420  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Kim, H. J.;Kim, J. W.;Kim, W. -J.;Kim, M. H.;Song, T. K.;Kim, S. S.;
7:2:1:307     Reduced leakage current in BiFeO3-BiCrO3 nanocomposite films formed by chemical solution deposition
DOI:10.1063/1.3467965  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Singh, Sushil K.;Shanthy, S.;Ishiwara, H.;
7:2:1:308     Correlation of spin and structure in doped bismuth ferrite nanoparticles
DOI:10.1063/1.3673814  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Lin, J. W.;Tite, Teddy;Tang, Y. H.;Lue, C. S.;Chang, Y. M.;Lin, J. G.;
7:2:1:309     Evidence of magnetoelectric coupling on calcium doped bismuth ferrite thin films grown by chemical solution deposition
DOI:10.1063/1.4867123  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Costa, L. V.;Ranieri, M. G.;Cilense, M.;Longo, E.;Simoes, A. Z.;
7:2:1:310     Effect of 8 MeV Si ions irradiation and thermal annealing in ZnO thin films
DOI:10.1016/j.jcrysgro.2012.05.038  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:1  AU: Hernandez-Socorro, D. R.;Montiel-Gonzalez, Z.;Rodil-Posada, S. E.;Flores-Morales, L.;Cruz-Manjarrez, H.;Hernandez-Alcantara, J. M.;Rodriguez-Fernandez, L.;
7:2:1:311     Room temperature ferroelectricity of YCrO3 thin films on Rh single crystals
DOI:10.1016/j.jcrysgro.2013.04.016  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:4  AU: Seo, J. -D.;Son, J. Y.;
7:2:1:312     Enhancement of magnetic and ferroelectric behaviour in (Ca, Co) co-doped HoMnO3 multiferroics
DOI:10.1016/j.jmmm.2013.06.035  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:0  AU: Rout, P. P.;Pradhan, S. K.;Das, S. K.;Samantaray, S.;Roul, B. K.;
7:2:1:313     Preparation and characterization of Zr4+-doped BiFeO3 ceramics
DOI:10.1016/j.matlet.2013.01.046  JN:MATERIALS LETTERS  PY:2013
  TC:3  AU: Xie, Junjie;Liu, Yan;Feng, Chude;Pan, Xiuhong;
7:2:1:314     Structural, magnetic and dielectric properties of Bi1-ySryFe(1-y)(1-x)Sc(1-y)xTiyO3 (x=0-0.2, y=0.1-0.3) ceramics
DOI:10.1016/j.materresbull.2010.12.008  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:5  AU: Shi, Chen-Yang;Liu, Xin-Zhi;Hao, Yong-Mei;Hu, Zhong-Bo;
7:2:1:315     The influence of nanoparticle size on the magnetostrictive properties of cluster-assembled Tb-Fe nanofilms
DOI:10.1016/j.tsf.2009.09.016  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Zhao, Shifeng;Wan, Jian-guo;Huang, Chuanfu;Song, Fengqi;Yao, Chang-hong;Han, Min;Wang, Guanghou;
7:2:1:316     V-doping effects on ferroelectric properties of K0.5Bi4.5Ti4O15 thin films
DOI:10.1016/j.tsf.2010.02.001  JN:THIN SOLID FILMS  PY:2010
  TC:4  AU: Kim, Jin Won;Do, Dalhyun;Kim, Sang Su;
7:2:2:1     Strain-induced isosymmetric phase transition in BiFeO3
DOI:10.1103/PhysRevB.81.054109  JN:PHYSICAL REVIEW B  PY:2010
  TC:103  AU: Hatt, Alison J.;Spaldin, Nicola A.;Ederer, Claude;
7:2:2:2     Low-Symmetry Monoclinic Phases and Polarization Rotation Path Mediated by Epitaxial Strain in Multiferroic BiFeO3 Thin Films
DOI:10.1002/adfm.201001867  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:93  AU: Chen, Zuhuang;Luo, Zhenlin;Huang, Chuanwei;Qi, Yajun;Yang, Ping;You, Lu;Hu, Chuansheng;Wu, Tom;Wang, Junling;Gao, Chen;Sritharan, Thirumany;Chen, Lang;
7:2:2:3     Stress-induced R-M-A-M-C-T symmetry changes in BiFeO3 films
DOI:10.1103/PhysRevB.83.144107  JN:PHYSICAL REVIEW B  PY:2011
  TC:70  AU: Christen, H. M.;Nam, J. H.;Kim, H. S.;Hatt, A. J.;Spaldin, N. A.;
7:2:2:4     First-principles predictions of low-energy phases of multiferroic BiFeO3
DOI:10.1103/PhysRevB.83.094105  JN:PHYSICAL REVIEW B  PY:2011
  TC:55  AU: Dieguez, Oswaldo;Gonzalez-Vazquez, O. E.;Wojdel, Jacek C.;Iniguez, Jorge;
7:2:2:5     Bridging Multiferroic Phase Transitions by Epitaxial Strain in BiFeO3
DOI:10.1103/PhysRevLett.105.057601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:65  AU: Infante, I. C.;Lisenkov, S.;Dupe, B.;Bibes, M.;Fusil, S.;Jacquet, E.;Geneste, G.;Petit, S.;Courtial, A.;Juraszek, J.;Bellaiche, L.;Barthelemy, A.;Dkhil, B.;
7:2:2:6     Nanoscale Structure and Mechanism for Enhanced Electromechanical Response of Highly Strained BiFeO3 Thin Films
DOI:10.1002/adma.201101164  JN:ADVANCED MATERIALS  PY:2011
  TC:54  AU: Damodaran, Anoop R.;Liang, Chen-Wei;He, Qing;Peng, Chun-Yen;Chang, Li;Chu, Ying-Hao;Martin, Lane W.;
7:2:2:7     Microscopic Origin of the Giant Ferroelectric Polarization in Tetragonal-like BiFeO3
DOI:10.1103/PhysRevLett.107.147602  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:61  AU: Zhang, J. X.;He, Q.;Trassin, M.;Luo, W.;Yi, D.;Rossell, M. D.;Yu, P.;You, L.;Wang, C. H.;Kuo, C. Y.;Heron, J. T.;Hu, Z.;Zeches, R. J.;Lin, H. J.;Tanaka, A.;Chen, C. T.;Tjeng, L. H.;Chu, Y-H.;Ramesh, R.;
7:2:2:8     Nanoscale Switching Characteristics of Nearly Tetragonal BiFeO3 Thin Films
DOI:10.1021/nl101187a  JN:NANO LETTERS  PY:2010
  TC:71  AU: Mazumdar, Dipanjan;Shelke, Vilas;Iliev, Milko;Jesse, Stephen;Kumar, Amit;Kalinin, Sergei V.;Baddorf, Arthur P.;Gupta, Arunava;
7:2:2:9     Coexistence of ferroelectric triclinic phases in highly strained BiFeO3 films
DOI:10.1103/PhysRevB.84.094116  JN:PHYSICAL REVIEW B  PY:2011
  TC:38  AU: Chen, Zuhuang;Prosandeev, S.;Luo, Z. L.;Ren, Wei;Qi, Yajun;Huang, C. W.;You, Lu;Gao, C.;Kornev, I. A.;Wu, Tom;Wang, Junling;Yang, P.;Sritharan, T.;Bellaiche, L.;Chen, Lang;
7:2:2:10     Overview No. 151 Multiferroic and magnetoelectric heterostructures
DOI:10.1016/j.actamat.2011.12.024  JN:ACTA MATERIALIA  PY:2012
  TC:55  AU: Martin, L. W.;Ramesh, R.;
7:2:2:11     Competing phases in BiFeO3 thin films under compressive epitaxial strain
DOI:10.1103/PhysRevB.81.144128  JN:PHYSICAL REVIEW B  PY:2010
  TC:50  AU: Dupe, B.;Infante, I. C.;Geneste, G.;Janolin, P. -E.;Bibes, M.;Barthelemy, A.;Lisenkov, S.;Bellaiche, L.;Ravy, S.;Dkhil, B.;
7:2:2:12     Multiferroic Phase Transition near Room Temperature in BiFeO3 Films
DOI:10.1103/PhysRevLett.107.237601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:32  AU: Infante, I. C.;Juraszek, J.;Fusil, S.;Dupe, B.;Gemeiner, P.;Dieguez, O.;Pailloux, F.;Jouen, S.;Jacquet, E.;Geneste, G.;Pacaud, J.;Iniguez, J.;Bellaiche, L.;Barthelemy, A.;Dkhil, B.;Bibes, M.;
7:2:2:13     Ab Initio Indications for Giant Magnetoelectric Effects Driven by Structural Softness
DOI:10.1103/PhysRevLett.105.037208  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:45  AU: Wojdel, Jacek C.;Iniguez, Jorge;
7:2:2:14     Strain-driven phase boundaries in BiFeO3 thin films studied by atomic force microscopy and x-ray diffraction
DOI:10.1103/PhysRevB.85.014104  JN:PHYSICAL REVIEW B  PY:2012
  TC:23  AU: Liu, Heng-Jui;Liang, Chen-Wei;Liang, Wen-I;Chen, Hsiang-Jung;Yang, Jan-Chi;Peng, Chun-Yen;Wang, Guang-Fu;Chu, Feng-Nan;Chen, Yi-Chun;Lee, Hsin-Yi;Chang, Li;Lin, Su-Jien;Chu, Ying-Hao;
7:2:2:15     Nanoscale domains in strained epitaxial BiFeO3 thin Films on LaSrAlO4 substrate
DOI:10.1063/1.3456729  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:42  AU: Chen, Zuhuang;You, Lu;Huang, Chuanwei;Qi, Yajun;Wang, Junling;Sritharan, Thirumany;Chen, Lang;
7:2:2:16     Tuning the atomic and domain structure of epitaxial films of multiferroic BiFeO3
DOI:10.1103/PhysRevB.81.144115  JN:PHYSICAL REVIEW B  PY:2010
  TC:37  AU: Daumont, C. J. M.;Farokhipoor, S.;Ferri, A.;Wojdel, J. C.;Iniguez, Jorge;Kooi, B. J.;Noheda, B.;
7:2:2:17     BiFeO3 Films under Tensile Epitaxial Strain from First Principles
DOI:10.1103/PhysRevLett.106.237601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:26  AU: Dupe, B.;Prosandeev, S.;Geneste, G.;Dkhil, B.;Bellaiche, L.;
7:2:2:18     Revisiting Properties of Ferroelectric and Multiferroic Thin Films under Tensile Strain from First Principles
DOI:10.1103/PhysRevLett.109.057602  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:22  AU: Yang, Yurong;Ren, Wei;Stengel, Massimiliano;Yan, X. H.;Bellaiche, L.;
7:2:2:19     Ferromagnetism in multiferroic BiFeO3 films: A first-principles-based study
DOI:10.1103/PhysRevB.81.140401  JN:PHYSICAL REVIEW B  PY:2010
  TC:37  AU: Albrecht, D.;Lisenkov, S.;Ren, Wei;Rahmedov, D.;Kornev, Igor A.;Bellaiche, L.;
7:2:2:20     Temperature and thickness evolution and epitaxial breakdown in highly strained BiFeO3 thin films
DOI:10.1103/PhysRevB.85.024113  JN:PHYSICAL REVIEW B  PY:2012
  TC:21  AU: Damodaran, Anoop R.;Lee, Sungki;Karthik, J.;MacLaren, Scott;Martin, Lane W.;
7:2:2:21     Low symmetry monoclinic M-C phase in epitaxial BiFeO3 thin films on LaSrAlO4 substrates
DOI:10.1063/1.3525378  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:24  AU: Chen, Zuhuang;Luo, Zhenlin;Qi, Yajun;Yang, Ping;Wu, Shuxiang;Huang, Chuanwei;Wu, Tom;Wang, Junling;Gao, Chen;Sritharan, Thirumany;Chen, Lang;
7:2:2:22     Nanoscale Control of Phase Variants in Strain-Engineered BiFeO3
DOI:10.1021/nl201719w  JN:NANO LETTERS  PY:2011
  TC:30  AU: Vasudevan, Rama K.;Liu, Yunya;Li, Jiangyu;Liang, Wen-I;Kumar, Amit;Jesse, Stephen;Chen, Yi-Chun;Chu, Ying-Hao;Nagarajan, Valanoor;Kalinin, Sergei V.;
7:2:2:23     Characterization and Manipulation of Mixed Phase Nanodomains in Highly Strained BiFeO3 Thin Films
DOI:10.1021/nn3012459  JN:ACS NANO  PY:2012
  TC:20  AU: You, Lu;Chen, Zuhuang;Zou, Xi;Ding, Hui;Chen, Weigang;Chen, Lang;Yuan, Guoliang;Wang, Junling;
7:2:2:24     Misfit strain driven cation inter-diffusion across an epitaxial multiferroic thin film interface
DOI:10.1063/1.4862556  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Krishnan, P. S. Sankara Rama;Morozovska, Anna N.;Eliseev, Eugene A.;Ramasse, Quentin M.;Kepaptsoglou, Demie;Liang, Wen-I.;Chu, Ying-Hao;Munroe, Paul;Nagarajan, V.;
7:2:2:25     Multidomains made of different structural phases in multiferroic BiFeO3: A first-principles-based study
DOI:10.1103/PhysRevB.88.134107  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Wang, Dawei;Salje, Ekhard K. H.;Mi, Shao-Bo;Jia, Chun-Lin;Bellaiche, L.;
7:2:2:26     Atomic Structure of Highly Strained BiFeO3 Thin Films
DOI:10.1103/PhysRevLett.108.047601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:23  AU: Rossell, M. D.;Erni, R.;Prange, M. P.;Idrobo, J. -C.;Luo, W.;Zeches, R. J.;Pantelides, S. T.;Ramesh, R.;
7:2:2:27     Atomic structure and microstructures of supertetragonal multiferroic BiFeO3 thin films
DOI:10.1103/PhysRevB.89.104106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Pailloux, F.;Couillard, M.;Fusil, S.;Bruno, F.;Saidi, W.;Garcia, V.;Carretero, C.;Jacquet, E.;Bibes, M.;Barthelemy, A.;Botton, G. A.;Pacaud, J.;
7:2:2:28     Phase Transitions in Epitaxial (-110) BiFeO3 Films from First Principles
DOI:10.1103/PhysRevLett.107.117602  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:15  AU: Prosandeev, S.;Kornev, Igor A.;Bellaiche, L.;
7:2:2:29     Anomalous low-energy phonons in nearly tetragonal BiFeO3 thin films
DOI:10.1103/PhysRevB.84.132408  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Choi, K. -Y.;Do, S. H.;Lemmens, P.;Wulferding, D.;Woo, C. S.;Lee, J. H.;Chu, K.;Yang, C. -H.;
7:2:2:30     Suppression of mixed-phase areas in highly elongated BiFeO3 thin films on NdAlO3 substrates
DOI:10.1103/PhysRevB.86.054417  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Woo, Chang-Su;Lee, Jin Hong;Chu, Kanghyun;Jang, Byung-Kweon;Kim, Yong-Bae;Koo, Tae Yeong;Yang, Ping;Qi, Yajun;Chen, Zuhuang;Chen, Lang;Choi, Hong Chul;Shim, Ji Hoon;Yang, Chan-Ho;
7:2:2:31     Antiferromagnetic transitions in tetragonal-like BiFeO3
DOI:10.1103/PhysRevB.85.100406  JN:PHYSICAL REVIEW B  PY:2012
  TC:16  AU: MacDougall, G. J.;Christen, H. M.;Siemons, W.;Biegalski, M. D.;Zarestky, J. L.;Liang, S.;Dagotto, E.;Nagler, S. E.;
7:2:2:32     Electrical Control of Multiferroic Orderings in Mixed-Phase BiFeO3 Films
DOI:10.1002/adma.201200463  JN:ADVANCED MATERIALS  PY:2012
  TC:15  AU: Chen, Yi-Chun;He, Qing;Chu, Feng-Nan;Huang, Yen-Chin;Chen, Jhih-Wei;Liang, Wen-I;Vasudevan, Rama K.;Nagarajan, Valanoor;Arenholz, Elke;Kalinin, Sergei V.;Chu, Ying-Hao;
7:2:2:33     Heteroepitaxy of Tetragonal BiFeO3 on Hexagonal Sapphire(0001)
DOI:10.1021/am405115y  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Zhao, Y. J.;Yin, Z. G.;Zhang, X. W.;Fu, Z.;Sun, B. J.;Wang, J. X.;Wu, J. L.;
7:2:2:34     Ferroelectric Domains in Multiferroic BiFeO3 Films under Epitaxial Strains
DOI:10.1103/PhysRevLett.110.187601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:8  AU: Ren, Wei;Yang, Yurong;Dieguez, Oswaldo;Iniguez, Jorge;Choudhury, Narayani;Bellaiche, L.;
7:2:2:35     Magnetoelectricity in BiFeO3 films: First-principles-based computations and phenomenology
DOI:10.1103/PhysRevB.83.020102  JN:PHYSICAL REVIEW B  PY:2011
  TC:19  AU: Prosandeev, S.;Kornev, Igor A.;Bellaiche, L.;
7:2:2:36     Epitaxial short-period PbTiO3/BiFeO3 superlattices studied by first-principles calculations
DOI:10.1103/PhysRevB.86.144114  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Yang, Yurong;Stengel, Massimiliano;Ren, Wei;Yan, X. H.;Bellaiche, L.;
7:2:2:37     Origin of a Tetragonal BiFeO3 Phase with a Giant c/a Ratio on SrTiO3 Substrates
DOI:10.1002/adfm.201101970  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:20  AU: Liu, Huajun;Yang, Ping;Yao, Kui;Khuong Phuong Ong;Wu, Ping;Wang, John;
7:2:2:38     Phase Transitions, Phase Coexistence, and Piezoelectric Switching Behavior in Highly Strained BiFeO3 Films
DOI:10.1002/adma.201302066  JN:ADVANCED MATERIALS  PY:2013
  TC:14  AU: Beekman, C.;Siemons, W.;Ward, T. Z.;Chi, M.;Howe, J.;Biegalski, M. D.;Balke, N.;Maksymovych, P.;Farrar, A. K.;Romero, J. B.;Gao, P.;Pan, X. Q.;Tenne, D. A.;Christen, H. M.;
7:2:2:39     Atomistic Molecular Dynamic Simulations of Multiferroics
DOI:10.1103/PhysRevLett.109.067203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:10  AU: Wang, Dawei;Weerasinghe, Jeevaka;Bellaiche, L.;
7:2:2:40     Periodic elastic nanodomains in ultrathin tetragonal-like BiFeO3 films
DOI:10.1103/PhysRevB.88.064103  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Luo, Zhenlin;Chen, Zuhuang;Yang, Yuanjun;Liu, Heng-Jui;Huang, Chuanwei;Huang, Haoliang;Wang, Haibo;Yang, Meng-Meng;Hu, Chuansheng;Pan, Guoqiang;Wen, Wen;Li, Xiaolong;He, Qing;Sritharan, Thirumany;Chu, Ying-Hao;Chen, Lang;Gao, Chen;
7:2:2:41     Effect of Substrate on Structure and Multiferrocity of (La, Mn) CoSubstituted BiFeO3 Thin Films
DOI:10.1111/jace.12360  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Wang, D. Y.;Ding, R.;Li, S.;
7:2:2:42     First-principles investigation of the structural phases and enhanced response properties of the BiFeO3-LaFeO3 multiferroic solid solution
DOI:10.1103/PhysRevB.85.064119  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Gonzalez-Vazquez, O. E.;Wojdel, Jacek C.;Dieguez, Oswaldo;Iniguez, Jorge;
7:2:2:43     Unraveling the origins of electromechanical response in mixed-phase bismuth ferrite
DOI:10.1103/PhysRevB.88.020402  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Vasudevan, R. K.;Okatan, M. B.;Liu, Y. Y.;Jesse, S.;Yang, J. -C.;Liang, W. -I.;Chu, Y. -H.;Li, J. Y.;Kalinin, S. V.;Nagarajan, V.;
7:2:2:44     Domain walls in a perovskite oxide with two primary structural order parameters: First-principles study of BiFeO3
DOI:10.1103/PhysRevB.87.024102  JN:PHYSICAL REVIEW B  PY:2013
  TC:13  AU: Dieguez, Oswaldo;Aguado-Puente, Pablo;Junquera, Javier;Iniguez, Jorge;
7:2:2:45     Nanoscale Mechanical Softening of Morphotropic BiFeO3
DOI:10.1002/adma.201401958  JN:ADVANCED MATERIALS  PY:2014
  TC:1  AU: Heo, Yooun;Jang, Byong-Kweon;Kim, Seung Jin;Yang, Chan-Ho;Seidel, Jan;
7:2:2:46     Orthorhombic BiFeO3
DOI:10.1103/PhysRevLett.109.247606  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:20  AU: Yang, J. C.;He, Q.;Suresha, S. J.;Kuo, C. Y.;Peng, C. Y.;Haislmaier, R. C.;Motyka, M. A.;Sheng, G.;Adamo, C.;Lin, H. J.;Hu, Z.;Chang, L.;Tjeng, L. H.;Arenholz, E.;Podraza, N. J.;Bernhagen, M.;Uecker, R.;Schlom, D. G.;Gopalan, V.;Chen, L. Q.;Chen, C. T.;Ramesh, R.;Chu, Y. H.;
7:2:2:47     Large tensile-strain-induced monoclinic M-B phase in BiFeO3 epitaxial thin films on a PrScO3 substrate
DOI:10.1103/PhysRevB.88.054114  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Chen, Zuhuang;Qi, Yajun;You, Lu;Yang, Ping;Huang, C. W.;Wang, Junling;Sritharan, Thirumany;Chen, Lang;
7:2:2:48     Tetragonal-tetragonal-monoclinic-rhombohedral transition: Strain relaxation of heavily compressed BiFeO3 epitaxial thin films
DOI:10.1063/1.4864077  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Fu, Z.;Yin, Z. G.;Chen, N. F.;Zhang, X. W.;Zhao, Y. J.;Bai, Y. M.;Chen, Y.;Wang, H. -H.;Zhang, X. L.;Wu, J. L.;
7:2:2:49     Intrinsic and quantitative effects of in-plane strain on ferroelectric properties of Mn-doped BiFeO3 epitaxial films by in situ inducing strain in substrates
DOI:10.1063/1.4863825  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Yang, M. M.;Zhao, X. Q.;Wang, J.;Zhu, Q. X.;Zhang, J. X.;Li, X. M.;Luo, H. S.;Li, X. G.;Zheng, R. K.;
7:2:2:50     Structural study in highly compressed BiFeO3 epitaxial thin films on YAlO3
DOI:10.1063/1.4746036  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Liu, Heng-Jui;Chen, Hsiang-Jung;Liang, Wen-I;Liang, Chen-Wei;Lee, Hsin-Yi;Lin, Su-Jien;Chu, Ying-Hao;
7:2:2:51     Electric control of straight stripe conductive mixed-phase nanostructures in La-doped BiFeO3
DOI:10.1038/am.2013.72  JN:NPG ASIA MATERIALS  PY:2014
  TC:6  AU: Kim, Kwang-Eun;Jang, Byung-Kweon;Heo, Yooun;Lee, Jin Hong;Jeong, Myoungho;Lee, Jeong Yong;Seidel, Jan;Yang, Chan-Ho;
7:2:2:52     Epitaxial strain and electric boundary condition effects on the structural and ferroelectric properties of BiFeO3 films
DOI:10.1103/PhysRevB.84.094105  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Johann, Florian;Morelli, Alessio;Biggemann, Daniel;Arredondo, Miryam;Vrejoiu, Ionela;
7:2:2:53     Phase separation and electrical switching between two isosymmetric multiferroic phases in tensile strained BiFeO3 thin films
DOI:10.1103/PhysRevB.89.140101  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Lee, Jin Hong;Chu, Kanghyun;Uenal, Ahmet A.;Valencia, Sergio;Kronast, Florian;Kowarik, Stefan;Seidel, Jan;Yang, Chan-Ho;
7:2:2:54     Twinning rotation and ferroelectric behavior of epitaxial BiFeO3 (001) thin film
DOI:10.1063/1.3276543  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:22  AU: Liu, Huajun;Yang, Ping;Yao, Kui;Wang, John;
7:2:2:55     Domain tuning in mixed-phase BiFeO3 thin films using vicinal substrates
DOI:10.1063/1.4717986  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: You, Lu;Yasui, Shintaro;Ehara, Yoshitaka;Zou, Xi;Ding, Hui;Chen, Zuhuang;Chen, Weigang;Chen, Lang;Funakubo, Hiroshi;Wang, Junling;
7:2:2:56     Untilting BiFeO3: The influence of substrate boundary conditions in ultra-thin BiFeO3 on SrTiO3
DOI:10.1063/1.4827596  JN:APL MATERIALS  PY:2013
  TC:4  AU: Yang, Yongsoo;Schlepuetz, Christian M.;Adamo, Carolina;Schlom, Darrell G.;Clarke, Roy;
7:2:2:57     Raman and X-ray diffraction study of (Ba,Sr)TiO3/(Bi,Nd)FeO3 multilayer heterostructures
DOI:10.1016/j.tsf.2013.08.057  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Anokhin, A. S.;Bunina, O. A.;Golovko, Yu I.;Mukhortov, V. M.;Yuzyuk, Yu I.;Simon, P.;
7:2:2:58     Probing the evolution of antiferromagnetism in multiferroics
DOI:10.1103/PhysRevB.81.134406  JN:PHYSICAL REVIEW B  PY:2010
  TC:30  AU: Holcomb, M. B.;Martin, L. W.;Scholl, A.;He, Q.;Yu, P.;Yang, C. -H.;Yang, S. Y.;Glans, P. -A.;Valvidares, M.;Huijben, M.;Kortright, J. B.;Guo, J.;Chu, Y. -H.;Ramesh, R.;
7:2:2:59     Atomic-Scale Visualization of Polarization Pinning and Relaxation at Coherent BiFeO3/LaAlO3 Interfaces
DOI:10.1002/adfm.201301470  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:6  AU: Huang, Rong;Ding, Hang-Chen;Liang, Wen-I;Gao, Yong-Chao;Tang, Xiao-Dong;He, Qing;Duan, Chun-Gang;Zhu, Ziqiang;Chu, Junhao;Fisher, Craig A. J.;Hirayama, Tsukasa;Ikuhara, Yuichi;Chu, Ying-Hao;
7:2:2:60     Domain structure and in-plane switching in a highly strained Bi0.9Sm0.1FeO3 film
DOI:10.1063/1.3664394  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Chen, Weigang;Ren, Wei;You, Lu;Yang, Yurong;Chen, Zuhuang;Qi, Yajun;Zou, Xi;Wang, Junling;Sritharan, Thirumany;Yang, Ping;Bellaiche, L.;Chen, Lang;
7:2:2:61     Electronic structure of multiferroic BiFeO3 and related compounds: Electron energy loss spectroscopy and density functional study
DOI:10.1103/PhysRevB.82.064102  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Saeterli, Ragnhild;Selbach, Sverre Magnus;Ravindran, Ponniah;Grande, Tor;Holmestad, Randi;
7:2:2:62     Growth rate induced monoclinic to tetragonal phase transition in epitaxial BiFeO3 (001) thin films
DOI:10.1063/1.3561757  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:20  AU: Liu, Huajun;Yang, Ping;Yao, Kui;Wang, John;
7:2:2:63     Mapping of the epitaxial stabilization of quasi-tetragonal BiFeO3 with deposition temperature
DOI:10.1063/1.3696048  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Dix, N.;Muralidharan, R.;Varela, M.;Fontcuberta, J.;Sanchez, F.;
7:2:2:64     Directed assembly of nano-scale phase variants in highly strained BiFeO3 thin films
DOI:10.1063/1.4752395  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Zhou, Jian;Trassin, Morgan;He, Qing;Tamura, Nobumichi;Kunz, Martin;Cheng, Chun;Zhang, Jinxing;Liang, Wen-I;Seidel, Jan;Hsin, Cheng-Lun;Wu, Junqiao;
7:2:2:65     Electrical and piezoelectric properties of BiFeO3 thin films grown on Sr(x)Ca(1-x)RuO(3-)buffered SrTiO3 substrates
DOI:10.1063/1.4724332  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Yao, Yingbang;Chen, Long;Wang, Zhihong;Alshareef, Husam;Zhang, X. X.;
7:2:2:66     Microstructure of highly strained BiFeO3 thin films: Transmission electron microscopy and electron-energy loss spectroscopy studies
DOI:10.1063/1.4863778  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Kim, Young Heon;Bhatnagar, Akash;Pippel, Eckhard;Alexe, Marin;Hesse, Dietrich;
7:2:2:67     Nanoscale Bi2FeO6-x precipitates in BiFeO3 thin films: a metastable Aurivillius phase
DOI:10.1007/s10853-014-8400-3  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:0  AU: Deniz, Hakan;Bhatnagar, Akash;Pippel, Eckhard;Hillebrand, Reinald;Haehnel, Angelika;Alexe, Marin;Hesse, Dietrich;
7:2:2:68     Polarized Raman spectroscopy of nearly tetragonal BiFeO3 thin films
DOI:10.1103/PhysRevB.82.014107  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Iliev, M. N.;Abrashev, M. V.;Mazumdar, D.;Shelke, V.;Gupta, A.;
7:2:2:69     Giant Enhancement of Ferroelectric Retention in BiFeO3 Mixed-Phase Boundary
DOI:10.1002/adma.201402442  JN:ADVANCED MATERIALS  PY:2014
  TC:2  AU: Huang, Yen-Chin;Liu, Yunya;Lin, Yi-Tsu;Liu, Heng-Jui;He, Qing;Li, Jiangyu;Chen, Yi-Chun;Chu, Ying-Hao;
7:2:2:70     Strain-driven phase transitions and associated dielectric/piezoelectric anomalies in BiFeO3 thin films
DOI:10.1063/1.3499658  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Huang, C. W.;Chu, Y. H.;Chen, Z. H.;Wang, Junling;Sritharan, T.;He, Q.;Ramesh, R.;Chen, Lang;
7:2:2:71     Strain dependence of transition temperatures and structural symmetry of BiFeO3 within the tetragonal-like structure
DOI:10.1063/1.4767335  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Siemons, W.;MacDougall, G. J.;Aczel, A. A.;Zarestky, J. L.;Biegalski, M. D.;Liang, S.;Dagotto, E.;Nagler, S. E.;Christen, H. M.;
7:2:2:72     Strain-engineered orthorhombic-rhombohedral phase boundary in epitaxial bismuth ferrite films
DOI:10.1063/1.4804962  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Liu, Y. Y.;Yang, L.;Li, J. Y.;
7:2:2:73     BiFeO3 Domain Wall Energies and Structures: A Combined Experimental and Density Functional Theory plus U Study
DOI:10.1103/PhysRevLett.110.267601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:5  AU: Wang, Yi;Nelson, Chris;Melville, Alexander;Winchester, Benjamin;Shang, Shunli;Liu, Zi-Kui;Schlom, Darrell G.;Pan, Xiaoqing;Chen, Long-Qing;
7:2:2:74     Relaxation of ferroelectric domains in epitaxial BiFeO3 thin films on vicinal SrTiO3 substrate
DOI:10.1016/j.tsf.2013.08.088  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Jang, Y. H.;Kim, C. H.;Seo, S. J.;Cho, J. H.;
7:2:2:75     Thickness-dependent magnetism and spin-glass behaviors in compressively strained BiFeO3 thin films
DOI:10.1063/1.3600064  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:21  AU: Cheng, Ching-Jung;Lu, Chengliang;Chen, Zuhuang;You, Lu;Chen, Lang;Wang, Junling;Wu, Tom;
7:2:2:76     Temperature-driven evolution of hierarchical nanodomain structure in tetragonal-like BiFeO3 films
DOI:10.1063/1.3676192  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Qi, Yajun;Chen, Zuhuang;Wang, Lihua;Han, Xiaodong;Wang, Junling;Sritharan, Thirumany;Chen, Lang;
7:2:2:77     Prediction of a Novel Magnetoelectric Switching Mechanism in Multiferroics
DOI:10.1103/PhysRevLett.112.057202  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:7  AU: Yang, Yurong;Iniguez, Jorge;Mao, Ai-Jie;Bellaiche, L.;
7:2:2:78     Temperature controlled c axis elongated low symmetry phase BiFeO3 thin film on STO substrate
DOI:10.1063/1.4789399  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Ren, Peng;Cho, Soon Khuen;Liu, Peng;You, Lu;Zou, Xi;Wang, Baomin;Wang, Junling;Wang, Lan;
7:2:2:79     Elastic properties of tetragonal BiFeO3 from first-principles calculations
DOI:10.1063/1.4804641  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Dong, Huafeng;Chen, Changqing;Wang, Shanying;Duan, Wenhui;Li, Jingbo;
7:2:2:80     Crafting the magnonic and spintronic response of BiFeO3 films by epitaxial strain
DOI:10.1038/NMAT3629  JN:NATURE MATERIALS  PY:2013
  TC:43  AU: Sando, D.;Agbelele, A.;Rahmedov, D.;Liu, J.;Rovillain, P.;Toulouse, C.;Infante, I. C.;Pyatakov, A. P.;Fusil, S.;Jacquet, E.;Carretero, C.;Deranlot, C.;Lisenkov, S.;Wang, D.;Le Breton, J-M.;Cazayous, M.;Sacuto, A.;Juraszek, J.;Zvezdin, A. K.;Bellaiche, L.;Dkhil, B.;Barthelemy, A.;Bibes, M.;
7:2:2:81     Evidence for a first-order transition from monoclinic alpha to monoclinic beta phase in BiFeO3 thin films
DOI:10.1103/PhysRevB.81.140101  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Toupet, H.;Le Marrec, F.;Lichtensteiger, C.;Dkhil, B.;Karkut, M. G.;
7:2:2:82     Neutron Diffraction Investigations of Magnetism in BiFeO3 Epitaxial Films
DOI:10.1002/adfm.201002125  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:18  AU: Ratcliff, William, II;Kan, Daisuke;Chen, Wangchun;Watson, Shannon;Chi, Songxue;Erwin, Ross;McIntyre, Garry J.;Capelli, Sylvia C.;Takeuchi, Ichiro;
7:2:2:83     Stability of heterophase nanostructure and field induced response of epitaxial ferroelectric films
DOI:10.1063/1.3653389  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Roytburd, Alexander L.;Ouyang, Jun;Boyerinas, Brad M.;Bruck, Hugh A.;
7:2:2:84     Stabilization of mixed-phase structures in highly strained BiFeO3 thin films via chemical-alloying
DOI:10.1063/1.3688175  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Damodaran, Anoop R.;Breckenfeld, Eric;Choquette, Amber K.;Martin, Lane W.;
7:2:2:85     First-Principles Investigation of Morphotropic Transitions and Phase-Change Functional Responses in BiFeO3-BiCoO3 Multiferroic Solid Solutions
DOI:10.1103/PhysRevLett.107.057601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:16  AU: Dieguez, Oswaldo;Iniguez, Jorge;
7:2:2:86     Strain Engineering Magnetic Frustration in Perovskite Oxide Thin Films
DOI:10.1103/PhysRevLett.109.247202  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: Escorihuela-Sayalero, Carlos;Dieguez, Oswaldo;Iniguez, Jorge;
7:2:2:87     Persistent Photoconductivity in Strained Epitaxial BiFeO3 Thin Films
DOI:10.1021/nl502183j  JN:NANO LETTERS  PY:2014
  TC:5  AU: Bhatnagar, Akash;Kim, Young Heon;Hesse, Dietrich;Alexe, Marin;
7:2:2:88     Crystal structure and local piezoelectric properties of strain-controlled (001) BiFeO3 epitaxial thin films
DOI:10.1016/j.tsf.2013.10.178  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Ujimoto, K.;Yoshimura, T.;Wakazono, K.;Ashida, A.;Fujimura, N.;
7:2:2:89     Domain pattern and piezoelectric response across polymorphic phase transition in strained bismuth ferrite films
DOI:10.1063/1.3525926  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Kuo, H. Y.;Shu, Y. C.;Chen, H. Z.;Hsueh, C. J.;Wang, C. H.;Chu, Y. H.;
7:2:2:90     Unit cell orientation of tetragonal-like BiFeO3 thin films grown on highly miscut LaAlO3 substrates
DOI:10.1063/1.4809601  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Beekman, C.;Siemons, W.;Ward, T. Z.;Budai, J. D.;Tischler, J. Z.;Xu, R.;Liu, W.;Balke, N.;Nam, J. H.;Christen, H. M.;
7:2:2:91     Sub-band level-assisted photoconduction in epitaxial BiFeO3 films
DOI:10.1063/1.4896508  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Bhatnagar, Akash;Kim, Young Heon;Hesse, Dietrich;Alexe, Marin;
7:2:2:92     Probing the domain structure of BiFeO3 epitaxial films with three-dimensional reciprocal space mapping
DOI:10.1063/1.4875579  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Luo, Z. L.;Huang, H.;Zhou, H.;Chen, Z. H.;Yang, Y.;Wu, L.;Zhu, C.;Wang, H.;Yang, M.;Hu, S.;Wen, H.;Zhang, X.;Zhang, Z.;Chen, L.;Fong, D. D.;Gao, C.;
7:2:2:93     Stability and crossover of 71 degrees and 109 degrees domains influenced by the film thickness and depolarization field in rhombohedral ferroelectric thin films
DOI:10.1063/1.3607977  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Huang, C. W.;Chen, Z. H.;Sritharan, Junling Wang T.;Chen, Lang;
7:2:2:94     Compositional tuning of the strain-induced structural phase transition and of ferromagnetism in Bi1-xBaxFeO3-delta
DOI:10.1557/jmr.2011.59  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:10  AU: Bennett, Charlee J. C.;Kim, Hyun Sik;Varela, Maria;Biegalski, Michael D.;Kim, Dae Ho;Norton, David P.;Meyer, Harry M., III;Christen, Hans M.;
7:2:2:95     Prediction of the Magnetotoroidic Effect from Atomistic Simulations
DOI:10.1103/PhysRevLett.107.127202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:6  AU: Ren, Wei;Bellaiche, L.;
7:2:2:96     Nanoscale phase separation in quasi-uniaxial and biaxial strained multiferroic thin films
DOI:10.1063/1.3644958  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Qi, Yajun;Huang, Chuanwei;Chen, Zuhuang;Luo, Zhenlin;Wang, Yiqian;Guo, Jun;White, Tim;Wang, Junling;Gao, Chen;Sritharan, Thirumany;Chen, Lang;
7:2:2:97     Unusual 90 degrees domain structure in (2/3)Bi(Zn1/2Ti1/2)O-3-(1/3)BiFeO3 epitaxial films with giant 22% tetragonal distortion
DOI:10.1063/1.4816420  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Yasui, Shintaro;Yazawa, Keisuke;Matsushima, Masaaki;Yamada, Tomoaki;Morioka, Hitoshi;Uchida, Hiroshi;Iijima, Takashi;You, Lu;Wang, Junling;Yamamoto, Takahisa;Ikuhara, Yuichi;Funakubo, Hiroshi;
7:2:2:98     Effect of substrate orientation on lattice relaxation of epitaxial BiFeO3 thin films
DOI:10.1063/1.3452360  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:16  AU: Kan, Daisuke;Takeuchi, Ichiro;
7:2:2:99     The role of SrRuO3 bottom layer in strain relaxation of BiFeO3 thin films deposited on lattice mismatched substrates
DOI:10.1063/1.3564940  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Shelke, Vilas;Mazumdar, Dipanjan;Srinivasan, G.;Gupta, Arunava;
7:2:2:100     Kittel Law in BiFeO3 Ultrathin Films: A First-Principles-Based Study
DOI:10.1103/PhysRevLett.105.147603  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:9  AU: Prosandeev, S.;Lisenkov, S.;Bellaiche, L.;
7:2:2:101     Electromechanical Coupling among Edge Dislocations, Domain Walls, and Nanodomains in BiFeO3 Revealed by Unit-Cell-Wise Strain and Polarization Maps
DOI:10.1021/nl304229k  JN:NANO LETTERS  PY:2013
  TC:10  AU: Lubk, A.;Rossell, M. D.;Seidel, J.;Chu, Y. H.;Ramesh, R.;Hyetch, M. J.;Snoeck, E.;
7:2:2:102     Tuning Phase Stability of Complex Oxide Nanocrystals via Conjugation
DOI:10.1021/nl500744h  JN:NANO LETTERS  PY:2014
  TC:4  AU: Kuo, Ho-Hung;Chen, Lei;Ji, Yanzhou;Liu, Heng-Jui;Chen, Long-Qing;Chu, Ying-Hao;
7:2:2:103     Size effects in multiferroic BiFeO3 nanodots: A first-principles-based study
DOI:10.1103/PhysRevB.82.113403  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Ren, Wei;Bellaiche, L.;
7:2:2:104     Uniaxial strain-induced ferroelectric phase with a giant axial ratio in a (110) BiFeO3 thin film
DOI:10.1103/PhysRevB.87.220101  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Liu, Huajun;Yang, Ping;Fan, Zhen;Kumar, Amit;Yao, Kui;Khuong Phuong Ong;Zeng, Kaiyang;Wang, John;
7:2:2:105     Tuning the polarization and magnetism in BiCoO3 by strain and oxygen vacancy effect: A first-principle study
DOI:10.1063/1.3672837  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Chen, Xing-Yuan;Chen, Li-Juan;Yang, Xiao-Bao;Zhao, Yu-Jun;Ding, Hang-Chen;Duan, Chun-Gang;
7:2:2:106     Multiferroic and structural properties of BiFeO3 close to the strain induced phase transition on different substrates
DOI:10.1063/1.4795216  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Mix, Christian;Jakob, Gerhard;
7:2:2:107     Investigation of nanodomain pattern and piezoelectric behavior of mixed phases in epitaxial BiFeO3 films
DOI:10.1016/j.jeurceramsoc.2011.04.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Kuo, H. Y.;Shu, Y. C.;Chen, H. Z.;Hsueh, C. J.;Wang, C. H.;Chu, Y. H.;
7:2:2:108     Magnetic structure of epitaxial multiferroic BiFeO3 films with engineered ferroelectric domains
DOI:10.1103/PhysRevB.82.134448  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Ke, X.;Zhang, P. P.;Baek, S. H.;Zarestky, J.;Tian, W.;Eom, C. B.;
7:2:2:109     Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin films using planar electrodes
DOI:10.1103/PhysRevB.86.235125  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;
7:2:2:110     Ab initio study of multiferroic BiFeO3 (110) surfaces
DOI:10.1103/PhysRevB.89.245437  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Shimada, Takahiro;Arisue, Kou;Wang, Jie;Kitamura, Takayuki;
7:2:2:111     Thermodynamics of formation of tetragonal and rhombohedral heterophase polydomains in epitaxial ferroelectric thin films
DOI:10.1016/j.actamat.2011.02.008  JN:ACTA MATERIALIA  PY:2011
  TC:9  AU: Ouyang, Jun;Zhang, Wei;Huang, Xiaoyue;Roytburd, A. L.;
7:2:2:112     Probing mixed tetragonal/rhombohedral-like monoclinic phases in strained bismuth ferrite films by optical second harmonic generation
DOI:10.1063/1.3483923  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Kumar, Amit;Denev, Sava;Zeches, Robert J.;Vlahos, Eftihia;Podraza, Nikolas J.;Melville, Alexander;Schlom, Darrell G.;Ramesh, R.;Gopalan, Venkatraman;
7:2:2:113     Selective Pure-Phase Synthesis of the Multiferroic BaMF4 (M = Mg, Mn, Co, Ni, and Zn) Family
DOI:10.1021/ja108965s  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:9  AU: Kim, Sun Woo;Chang, Hong Young;Halasyamani, P. Shiv;
7:2:2:114     Thickness-dependent evolutions of domain configuration and size in ferroelectric and ferroelectric-ferroelastic films
DOI:10.1063/1.4794005  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Huang, C. W.;Chen, Z. H.;Chen, Lang;
7:2:2:115     Preparation of monoclinic 0.9(BiFeO3)-0.1(BiCoO3) epitaxial films on orthorhombic YAlO3 (100) substrates by r.f. magnetron sputtering
DOI:10.1016/j.jcrysgro.2014.09.044  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Ichinose, T.;Naganuma, H.;Mukaiyama, K.;Oogane, M.;Ando, Y.;
7:2:2:116     Equilibrium Phase Structures for BiFeO3 Thin Films on LaAlO3 Substrate
DOI:10.1080/10584587.2012.660450  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Huang, C. W.;Chen, Lang;
7:2:2:117     Magnetic and structural properties of BiFeO3 thin films grown epitaxially on SrTiO3/Si substrates
DOI:10.1063/1.4796150  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Laughlin, Ryan P.;Currie, Daniel A.;Contreras-Guererro, Rocio;Dedigama, Aruna;Priyantha, Weerasinghe;Droopad, Ravindranath;Theodoropoulou, Nikoleta;Gao, Peng;Pan, Xiaoqing;
7:2:2:118     Effect of thickness-mediated misfit strain on the heterophase polydomain structure of epitaxial BiFeO3 films
DOI:10.1016/j.scriptamat.2011.12.030  JN:SCRIPTA MATERIALIA  PY:2012
  TC:2  AU: Zhang, Wei;Ouyang, Jun;Roytburd, A. L.;
7:2:2:119     Focused-ion-beam induced damage in thin films of complex oxide BiFeO3
DOI:10.1063/1.4866051  JN:APL MATERIALS  PY:2014
  TC:0  AU: Siemons, W.;Beekman, C.;Fowlkes, J. D.;Balke, N.;Tischler, J. Z.;Xu, R.;Liu, W.;Gonzales, C. M.;Budai, J. D.;Christen, H. M.;
7:2:2:120     Electronic and Magnetic Properties of BiFeO3: Gd3+
DOI:10.1080/00150193.2014.889977  JN:FERROELECTRICS  PY:2014
  TC:3  AU: Pugaczowa-Michalska, M.;Kaczkowski, J.;Jezierski, A.;
7:2:2:121     Theory of magnetization in multiferroics: Competition between ferromagnetic and antiferromagnetic domains
DOI:10.1103/PhysRevB.83.054424  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Gomonay, Helen V.;Korniienko, Ievgeniya G.;Loktev, Vadim M.;
7:2:2:122     Testing simple predictors for the temperature of a structural phase transition
DOI:10.1103/PhysRevB.90.014105  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wojdel, Jacek C.;Iniguez, Jorge;
7:2:2:123     Domain walls in a perovskite oxide with two primary structural order parameters: First-principles study of BiFeO3 (vol 87, 024102, 2013)
DOI:10.1103/PhysRevB.89.059901  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Dieguez, Oswaldo;Aguado-Puente, Pablo;Junquera, Javier;Iniguez, Jorge;
7:2:2:124     Enhanced Magnetization and Ferroelectric Switching in Multiferroic BST/BNFO Superstructures
DOI:10.1080/00150193.2012.696448  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Ivanov, M. S.;Sherstyuk, N. E.;Mishina, E. D.;Sigov, A. S.;Mukhortov, V. M.;Moshnyaga, V. T.;
7:2:2:125     Bridging Multiferroic Phase Transitions by Epitaxial Strain in BiFeO3 (vol 105, 057601, 2010)
DOI:10.1103/PhysRevLett.105.079901  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:0  AU: Infante, I. C.;Lisenkov, S.;Dupe, B.;Bibes, M.;Fusil, S.;Jacquet, E.;Geneste, G.;Petit, S.;Courtial, A.;Juraszek, J.;Bellaiche, L.;Barthelemy, A.;Dkhil, B.;
7:2:3:1     Domain Wall Conductivity in La-Doped BiFeO3
DOI:10.1103/PhysRevLett.105.197603  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:99  AU: Seidel, J.;Maksymovych, P.;Batra, Y.;Katan, A.;Yang, S. -Y.;He, Q.;Baddorf, A. P.;Kalinin, S. V.;Yang, C. -H.;Yang, J. -C.;Chu, Y. -H.;Salje, E. K. H.;Wormeester, H.;Salmeron, M.;Ramesh, R.;
7:2:3:2     Conduction at Domain Walls in Insulating Pb(Zr0.2Ti0.8)O3 Thin Films
DOI:10.1002/adma.201102254  JN:ADVANCED MATERIALS  PY:2011
  TC:83  AU: Guyonnet, Jill;Gaponenko, Iaroslav;Gariglio, Stefano;Paruch, Patrycja;
7:2:3:3     Conduction through 71 degrees DomainWalls in BiFeO3 Thin Films
DOI:10.1103/PhysRevLett.107.127601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:72  AU: Farokhipoor, S.;Noheda, B.;
7:2:3:4     Domain Wall Conduction and Polarization-Mediated Transport in Ferroelectrics
DOI:10.1002/adfm.201300085  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:15  AU: Vasudevan, Rama K.;Wu, Weida;Guest, Jeffrey R.;Baddorf, Arthur P.;Morozovska, Anna N.;Eliseev, Eugene A.;Balke, Nina;Nagarajan, V.;Maksymovych, Peter;Kalinin, Sergei V.;
7:2:3:5     Dynamic Conductivity of Ferroelectric Domain Walls in BiFeO3
DOI:10.1021/nl104363x  JN:NANO LETTERS  PY:2011
  TC:70  AU: Maksymovych, Peter;Seidel, Jan;Chu, Ying Hao;Wu, Pingping;Baddorf, Arthur P.;Chen, Long-Qing;Kalinin, Sergei V.;Ramesh, Ramamoorthy;
7:2:3:6     Direct Observation of Ferrielectricity at Ferroelastic Domain Boundaries in CaTiO3 by Electron Microscopy
DOI:10.1002/adma.201103717  JN:ADVANCED MATERIALS  PY:2012
  TC:69  AU: Van Aert, Sandra;Turner, Stuart;Delville, Remi;Schryvers, Dominique;Van Tendeloo, Gustaaf;Salje, Ekhard K. H.;
7:2:3:7     Static conductivity of charged domain walls in uniaxial ferroelectric semiconductors
DOI:10.1103/PhysRevB.83.235313  JN:PHYSICAL REVIEW B  PY:2011
  TC:45  AU: Eliseev, E. A.;Morozovska, A. N.;Svechnikov, G. S.;Gopalan, Venkatraman;Shur, V. Ya.;
7:2:3:8     Domain walls of ferroelectric BaTiO3 within the Ginzburg-Landau-Devonshire phenomenological model
DOI:10.1103/PhysRevB.81.144125  JN:PHYSICAL REVIEW B  PY:2010
  TC:47  AU: Marton, P.;Rychetsky, I.;Hlinka, J.;
7:2:3:9     Head-to-head and tail-to-tail 180 degrees domain walls in an isolated ferroelectric
DOI:10.1103/PhysRevB.83.184104  JN:PHYSICAL REVIEW B  PY:2011
  TC:37  AU: Gureev, M. Y.;Tagantsev, A. K.;Setter, N.;
7:2:3:10     Conductivity of twin-domain-wall/surface junctions in ferroelastics: Interplay of deformation potential, octahedral rotations, improper ferroelectricity, and flexoelectric coupling
DOI:10.1103/PhysRevB.86.085416  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Eliseev, Eugene A.;Morozovska, Anna N.;Gu, Yijia;Borisevich, Albina Y.;Chen, Long-Qing;Gopalan, Venkatraman;Kalinin, Sergei V.;
7:2:3:11     Tunable Metallic Conductance in Ferroelectric Nanodomains
DOI:10.1021/nl203349b  JN:NANO LETTERS  PY:2012
  TC:40  AU: Maksymovych, Peter;Morozovska, Anna N.;Yu, Pu;Eliseev, Eugene A.;Chu, Ying-Hao;Ramesh, Ramamoorthy;Baddorf, Arthur P.;Kalinin, Sergei V.;
7:2:3:12     Interfacial polarization and pyroelectricity in antiferrodistortive structures induced by a flexoelectric effect and rotostriction
DOI:10.1103/PhysRevB.85.094107  JN:PHYSICAL REVIEW B  PY:2012
  TC:24  AU: Morozovska, Anna N.;Eliseev, Eugene A.;Glinchuk, Maya D.;Chen, Long-Qing;Gopalan, Venkatraman;
7:2:3:13     Domain wall conduction in multiaxial ferroelectrics
DOI:10.1103/PhysRevB.85.045312  JN:PHYSICAL REVIEW B  PY:2012
  TC:18  AU: Eliseev, Eugene A.;Morozovska, Anna N.;Svechnikov, George S.;Maksymovych, Peter;Kalinin, Sergei V.;
7:2:3:14     Anisotropic conductivity of uncharged domain walls in BiFeO3
DOI:10.1103/PhysRevB.86.085315  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Morozovska, Anna N.;Vasudevan, Rama K.;Maksymovych, Peter;Kalinin, Sergei V.;Eliseev, Eugene A.;
7:2:3:15     Mapping Octahedral Tilts and Polarization Across a Domain Wall in BiFeO3 from Z-Contrast Scanning Transmission Electron Microscopy Image Atomic Column Shape Analysis
DOI:10.1021/nn1011539  JN:ACS NANO  PY:2010
  TC:50  AU: Borisevich, AlbinaY.;Ovchinnikov, Oleg S.;Chang, Hye Jung;Oxley, Mark P.;Yu, Pu;Seidel, Jan;Eliseev, Eugine A.;Morozovska, Anna N.;Ramesh, Ramamoorthy;Pennycook, Stephen J.;Kalinin, Sergei V.;
7:2:3:16     Structural phase transitions and electronic phenomena at 180-degree domain walls in rhombohedral BaTiO3
DOI:10.1103/PhysRevB.87.054111  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Eliseev, Eugene A.;Yudin, Peter V.;Kalinin, Sergei V.;Setter, Nava;Tagantsev, Alexander K.;Morozovska, Anna N.;
7:2:3:17     Multifunctionalities driven by ferroic domains
DOI:10.1063/1.4891632  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Yang, J. C.;Huang, Y. L.;He, Q.;Chu, Y. H.;
7:2:3:18     Domain Wall Geometry Controls Conduction in Ferroelectrics
DOI:10.1021/nl302382k  JN:NANO LETTERS  PY:2012
  TC:19  AU: Vasudevan, R. K.;Morozovska, A. N.;Eliseev, E. A.;Britson, J.;Yang, J. -C.;Chu, Y. -H.;Maksymovych, P.;Chen, L. Q.;Nagarajan, V.;Kalinin, S. V.;
7:2:3:19     Conducting Domain Walls in Lithium Niobate Single Crystals
DOI:10.1002/adfm.201201174  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:38  AU: Schroeder, Mathias;Haussmann, Alexander;Thiessen, Andreas;Soergel, Elisabeth;Woike, Theo;Eng, Lukas M.;
7:2:3:20     Ferroelectric Domain Wall Injection
DOI:10.1002/adma.201303567  JN:ADVANCED MATERIALS  PY:2014
  TC:10  AU: Whyte, Jonathan R.;McQuaid, Raymond G. P.;Sharma, Pankaj;Canalias, Carlota;Scott, James F.;Gruverman, Alexei;Gregg, J. Marty;
7:2:3:21     Surface polar states and pyroelectricity in ferroelastics induced by flexo-roto field
DOI:10.1063/1.3701152  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:17  AU: Morozovska, A. N.;Eliseev, E. A.;Kalinin, S. V.;Chen, Long Qing;Gopalan, Venkatraman;
7:2:3:22     Magnetotransport at Domain Walls in BiFeO3
DOI:10.1103/PhysRevLett.108.067203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:31  AU: He, Q.;Yeh, C-H.;Yang, J-C.;Singh-Bhalla, G.;Liang, C-W.;Chiu, P-W.;Catalan, G.;Martin, L. W.;Chu, Y-H.;Scott, J. F.;Ramesh, R.;
7:2:3:23     Landau theory of domain wall magnetoelectricity
DOI:10.1103/PhysRevB.81.224118  JN:PHYSICAL REVIEW B  PY:2010
  TC:42  AU: Daraktchiev, Maren;Catalan, Gustau;Scott, James F.;
7:2:3:24     Domain Wall Conduction in Ferroelectrics
DOI:10.1080/00150193.2012.744258  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Morozovska, A. N.;
7:2:3:25     Atomic-Scale Evolution of Local Electronic Structure Across Multiferroic Domain Walls
DOI:10.1002/adma.201004143  JN:ADVANCED MATERIALS  PY:2011
  TC:40  AU: Chiu, Ya-Ping;Chen, Yu-Ting;Huang, Bo-Chao;Shih, Min-Chuan;Yang, Jan-Chi;He, Qing;Liang, Chen-Wei;Seidel, Jan;Chen, Yi-Chun;Ramesh, Ramamoorthy;Chu, Ying-Hao;
7:2:3:26     Electronic Properties of Isosymmetric Phase Boundaries in Highly Strained Ca-Doped BiFeO3
DOI:10.1002/adma.201400557  JN:ADVANCED MATERIALS  PY:2014
  TC:2  AU: Seidel, Jan;Trassin, Morgan;Zhang, Yi;Maksymovych, Peter;Uhlig, Tino;Milde, Peter;Koehler, Denny;Baddorf, Arthur P.;Kalinin, Sergei V.;Eng, Lukas M.;Pan, Xiaoqing;Ramesh, Ramamoorthy;
7:2:3:27     Nanoscale properties of thin twin walls and surface layers in piezoelectric WO3-x
DOI:10.1063/1.3292587  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:32  AU: Kim, Yunseok;Alexe, Marin;Salje, Ekhard K. H.;
7:2:3:28     Ferroelectric Bloch-line switching: A paradigm for memory devices?
DOI:10.1063/1.4905001  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Salje, E. K. H.;Scott, J. F.;
7:2:3:29     Sequential injection of domain walls into ferroelectrics at different bias voltages: Paving the way for "domain wall memristors"
DOI:10.1063/1.4891347  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Whyte, J. R.;McQuaid, R. G. P.;Ashcroft, C. M.;Einsle, J. F.;Canalias, C.;Gruverman, A.;Gregg, J. M.;
7:2:3:30     Local conductivity and the role of vacancies around twin walls of (001)-BiFeO3 thin films
DOI:10.1063/1.4746073  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Farokhipoor, S.;Noheda, B.;
7:2:3:31     Trapping of oxygen vacancies in the twin walls of perovskite
DOI:10.1103/PhysRevB.81.024109  JN:PHYSICAL REVIEW B  PY:2010
  TC:24  AU: Goncalves-Ferreira, Liliana;Redfern, Simon A. T.;Artacho, Emilio;Salje, Ekhard;Lee, William T.;
7:2:3:32     Scaling Behavior of Resistive Switching in Epitaxial Bismuth Ferrite Heterostructures
DOI:10.1002/adfm.201400110  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:7  AU: Rana, Abhimanyu;Lu, Haidong;Bogle, Kashinath;Zhang, Qi;Vasudevan, Rama;Thakare, Vishal;Gruverman, Alexei;Ogale, Satishchandra;Valanoor, Nagarajan;
7:2:3:33     Domain Wall Damping and Elastic Softening in SrTiO3: Evidence for Polar Twin Walls
DOI:10.1103/PhysRevLett.109.187601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:18  AU: Scott, J. F.;Salje, E. K. H.;Carpenter, M. A.;
7:2:3:34     Atomic Scale Structure Changes Induced by Charged Domain Walls in Ferroelectric Materials
DOI:10.1021/nl402651r  JN:NANO LETTERS  PY:2013
  TC:7  AU: Li, Linze;Gao, Peng;Nelson, Christopher T.;Jokisaari, Jacob R.;Zhang, Yi;Kim, Sung-Joo;Melville, Alexander;Adamo, Carolina;Schlom, Darrell G.;Pan, Xiaoqing;
7:2:3:35     Correlated polarization switching in the proximity of a 180 degrees domain wall
DOI:10.1103/PhysRevB.82.024111  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Aravind, Vasudeva Rao;Morozovska, A. N.;Bhattacharyya, Saswata;Lee, D.;Jesse, S.;Grinberg, I.;Li, Y. L.;Choudhury, S.;Wu, P.;Seal, K.;Rappe, A. M.;Svechnikov, S. V.;Eliseev, E. A.;Phillpot, S. R.;Chen, L. Q.;Gopalan, Venkatraman;Kalinin, S. V.;
7:2:3:36     Elastic excitations in BaTiO3 single crystals and ceramics: Mobile domain boundaries and polar nanoregions observed by resonant ultrasonic spectroscopy
DOI:10.1103/PhysRevB.87.014106  JN:PHYSICAL REVIEW B  PY:2013
  TC:10  AU: Salje, Ekhard K. H.;Carpenter, Michael A.;Nataf, Guillaume F.;Picht, Gunnar;Webber, Kyle;Weerasinghe, Jeevaka;Lisenkov, S.;Bellaiche, L.;
7:2:3:37     Flexoelectricity and ferroelectric domain wall structures: Phase-field modeling and DFT calculations
DOI:10.1103/PhysRevB.89.174111  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Gu, Yijia;Li, Menglei;Morozovska, Anna N.;Wang, Yi;Eliseev, Eugene A.;Gopalan, Venkatraman;Chen, Long-Qing;
7:2:3:38     Mesoscopic mechanism of the domain wall interaction with elastic defects in uniaxial ferroelectrics
DOI:10.1063/1.4801959  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Morozovska, Anna N.;Eliseev, Eugene A.;Svechnikov, G. S.;Kalinin, Sergei V.;
7:2:3:39     Polarization-Modulated Rectification at Ferroelectric Surfaces
DOI:10.1103/PhysRevLett.104.217601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:17  AU: Wu, Weida;Guest, J. R.;Horibe, Y.;Park, S.;Choi, T.;Cheong, S. -W.;Bode, M.;
7:2:3:40     Domains within Domains and Walls within Walls: Evidence for Polar Domains in Cryogenic SrTiO3
DOI:10.1103/PhysRevLett.111.247603  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:9  AU: Salje, E. K. H.;Aktas, O.;Carpenter, M. A.;Laguta, V. V.;Scott, J. F.;
7:2:3:41     Bichiral structure of ferroelectric domain walls driven by flexoelectricity
DOI:10.1103/PhysRevB.86.134102  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Yudin, P. V.;Tagantsev, A. K.;Eliseev, E. A.;Morozovska, A. N.;Setter, N.;
7:2:3:42     Ferroelectric Transitions at Ferroelectric Domain Walls Found from First Principles
DOI:10.1103/PhysRevLett.112.247603  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Wojdel, Jacek C.;Iniguez, Jorge;
7:2:3:43     Optical three-dimensional profiling of charged domain walls in ferroelectrics by Cherenkov second-harmonic generation
DOI:10.1103/PhysRevB.89.035314  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Kaempfe, T.;Reichenbach, P.;Schroeder, M.;Haussmann, A.;Eng, L. M.;Woike, T.;Soergel, E.;
7:2:3:44     Direct evidence of polar nature of ferroelastic twin boundaries in CaTiO3 obtained by second harmonic generation microscope
DOI:10.1103/PhysRevB.89.144109  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Yokota, H.;Usami, H.;Haumont, R.;Hicher, P.;Kaneshiro, J.;Salje, E. K. H.;Uesu, Y.;
7:2:3:45     Deep Data Analysis of Conductive Phenomena on Complex Oxide Interfaces: Physics from Data Mining
DOI:10.1021/nn502029b  JN:ACS NANO  PY:2014
  TC:6  AU: Strelcov, Evgheni;Belianinov, Alexei;Hsieh, Ying-Hui;Jesse, Stephen;Baddorf, Arthur P.;Chu, Ying-Hao;Kalinin, Sergei V.;
7:2:3:46     Polar precursor ordering in BaTiO3 detected by resonant piezoelectric spectroscopy
DOI:10.1063/1.4823576  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:10  AU: Aktas, Oktay;Carpenter, Michael A.;Salje, Ekhard K. H.;
7:2:3:47     Domain relaxation dynamics in epitaxial BiFeO3 films: Role of surface charges
DOI:10.1063/1.4746077  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Chen, Yi-Chun;Ko, Cheng-Hung;Huang, Yen-Chin;Yang, Jan-Chi;Chu, Ying-Hao;
7:2:3:48     Origin of the Bloch-type polarization components at the 180 degrees domain walls in ferroelectric PbTiO3
DOI:10.1063/1.4904192  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Wang, Y. J.;Chen, D.;Tang, Y. L.;Zhu, Y. L.;Ma, X. L.;
7:2:3:49     Thermal quench effects on ferroelectric domain walls
DOI:10.1103/PhysRevB.85.214115  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Paruch, P.;Kolton, A. B.;Hong, X.;Ahn, C. H.;Giamarchi, T.;
7:2:3:50     First-principles study of 180 degrees domain walls in BaTiO3: Mixed Bloch-Neel-Ising character
DOI:10.1103/PhysRevB.90.054106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Li, Menglei;Gu, Yijia;Wang, Yi;Chen, Long-Qing;Duan, Wenhui;
7:2:3:51     Impact of Free Charges on Polarization and Pyroelectricity in Antiferrodistortive Structures and Surfaces Induced by a Flexoelectric Effect
DOI:10.1080/00150193.2012.744257  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Morozovska, A. N.;Eliseev, E. A.;Glinchuk, M. D.;Chen, Long Qing;Kalinin, S. V.;Gopalan, V.;
7:2:3:52     Local electrical conduction in polycrystalline La-doped BiFeO3 thin films
DOI:10.1088/0957-4484/24/22/225702  JN:NANOTECHNOLOGY  PY:2013
  TC:5  AU: Zhou, Ming-Xiu;Chen, Bo;Sun, Hai-Bin;Wan, Jian-Guo;Li, Zi-Wei;Liu, Jun-Ming;Song, Feng-Qi;Wang, Guang-Hou;
7:2:3:53     Electrical Modulation of the Local Conduction at Oxide Tubular Interfaces
DOI:10.1021/nn402763w  JN:ACS NANO  PY:2013
  TC:9  AU: Hsieh, Ying-Hui;Strelcov, Evgheni;Liou, Jia-Ming;Shen, Chia-Ying;Chen, Yi-Chun;Kalinin, Sergei V.;Chu, Ying-Hao;
7:2:3:54     Spintronic Functionality of BiFeO3 Domain Walls
DOI:10.1002/adma.201402558  JN:ADVANCED MATERIALS  PY:2014
  TC:3  AU: Lee, Ji Hye;Fina, Ignasi;Marti, Xavi;Kim, Young Heon;Hesse, Dietrich;Alexe, Marin;
7:2:3:55     Domain wall conductivity in oxygen deficient multiferroic YMnO3 single crystals
DOI:10.1063/1.3671393  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Du, Y.;Wang, X. L.;Chen, D. P.;Dou, S. X.;Cheng, Z. X.;Higgins, M.;Wallace, G.;Wang, J. Y.;
7:2:3:56     Domain growth kinetics in La0.89Sr0.11MnO3 single crystal studied by piezoresponse force microscopy
DOI:10.1063/1.4746084  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Panwar, Neeraj;Bdikin, Igor K.;Morozovska, Anna N.;Kholkin, Andrei L.;
7:2:3:57     Bloch-type domain walls in rhombohedral BaTiO3
DOI:10.1103/PhysRevB.86.155138  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Taherinejad, Maryam;Vanderbilt, David;Marton, Pavel;Stepkova, Vilgelmina;Hlinka, Jiri;
7:2:3:58     Influence of flexoelectric coupling on domain patterns in ferroelectrics
DOI:10.1103/PhysRevB.89.174105  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Ahluwalia, Rajeev;Tagantsev, Alexander K.;Yudin, Petr;Setter, Nava;Ng, Nathaniel;Srolovitz, David J.;
7:2:3:59     Sub-critical field domain reversal in epitaxial ferroelectric films
DOI:10.1063/1.4896730  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chen, Jason;Gruverman, Alexei;Morozovska, Anna N.;Valanoor, Nagarajan;
7:2:3:60     Multiscaling Analysis of Ferroelectric Domain Wall Roughness
DOI:10.1103/PhysRevLett.109.147601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: Guyonnet, J.;Agoritsas, E.;Bustingorry, S.;Giamarchi, T.;Paruch, P.;
7:2:3:61     Evidence of Sharp and Diffuse Domain Walls in BiFeO3 by Means of Unit-Cell-Wise Strain and Polarization Maps Obtained with High Resolution Scanning Transmission Electron Microscopy
DOI:10.1103/PhysRevLett.109.047601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:13  AU: Lubk, A.;Rossell, M. D.;Seidel, J.;He, Q.;Yang, S. Y.;Chu, Y. H.;Ramesh, R.;Hytch, M. J.;Snoeck, E.;
7:2:3:62     Non-volatile domain nucleation and growth in multiferroic BiFeO3 films
DOI:10.1088/0957-4484/22/25/254030  JN:NANOTECHNOLOGY  PY:2011
  TC:14  AU: Chen, Yi-Chun;Wang, Guang-Fu;Tai, Hsiang-Hua;Chen, Jhih-Wei;Huang, Yen-Chin;Yang, Jan-Chi;Chu, Ying-Hao;
7:2:3:63     Structure and energetics of ferroelectric domain walls in LiNbO3 from atomic-level simulations
DOI:10.1103/PhysRevB.82.014104  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Lee, Donghwa;Xu, Haixuan;Dierolf, Volkmar;Gopalan, Venkatraman;Phillpot, Simon R.;
7:2:3:64     Piezoelectric properties of twinned ferroelectric perovskites with head-to-head and tail-to-tail domain walls
DOI:10.1103/PhysRevB.88.024114  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Ondrejkovic, P.;Marton, P.;Guennou, M.;Setter, N.;Hlinka, J.;
7:2:3:65     Highly mobile vortex structures inside polar twin boundaries in SrTiO3
DOI:10.1063/1.4866859  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Zykova-Timan, Tatyana;Salje, Ekhard K. H.;
7:2:3:66     Effect of doping on polarization profiles and switching in semiconducting ferroelectric thin films
DOI:10.1063/1.3702849  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Shenoy, Vivek B.;Xiao, Yu;Bhattacharya, Kaushik;
7:2:3:67     Stability and charge transfer levels of extrinsic defects in LiNbO3
DOI:10.1103/PhysRevB.82.184109  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Xu, Haixuan;Chernatynskiy, Aleksandr;Lee, Donghwa;Sinnott, Susan B.;Gopalan, Venkatraman;Dierolf, Volkmar;Phillpot, Simon R.;
7:2:3:68     Ferroelectric charged domain walls in an applied electric field
DOI:10.1103/PhysRevB.86.104104  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Gureev, M. Y.;Mokry, P.;Tagantsev, A. K.;Setter, N.;
7:2:3:69     Minimum domain size and stability in carbon nanotube-ferroelectric devices
DOI:10.1063/1.4757880  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Blaser, C.;Paruch, P.;
7:2:3:70     On the Link Beween Octahedral Rotations and Conductivity in the Domain Walls of BiFeO3
DOI:10.1080/07399332.2012.678127  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Catalan, Gustau;
7:2:3:71     Correlated motion dynamics of electron channels and domain walls in a ferroelectric-gate thin-film transistor consisting of a ZnO/Pb(Zr,Ti)O-3 stacked structure
DOI:10.1063/1.3651098  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Kaneko, Yukihiro;Nishitani, Yu;Tanaka, Hiroyuki;Ueda, Michihito;Kato, Yoshihisa;Tokumitsu, Eisuke;Fujii, Eiji;
7:2:3:72     Polarization Switching Ability Dependent on Multidomain Topology in a Uniaxial Organic Ferroelectric
DOI:10.1021/nl403828u  JN:NANO LETTERS  PY:2014
  TC:9  AU: Kagawa, Fumitaka;Horiuchi, Sachio;Minami, Nao;Ishibashi, Shoji;Kobayashi, Kensuke;Kumai, Reiji;Murakami, Youichi;Tokura, Yoshinori;
7:2:3:73     Spectral analysis of resonance ultrasonic spectroscopy: Kramers-Kronig analysis, Fano profiles, and the case of precursor softening in SnTe:Cr
DOI:10.1063/1.3489376  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Safarik, D. J.;Salje, E. K. H.;Lashley, J. C.;
7:2:3:74     Flicker vortex structures in multiferroic materials
DOI:10.1063/1.48961431  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhao, Z.;Ding, X.;Salje, E. K. H.;
7:2:3:75     Unusual dielectric behavior and domain structure in rhombohedral phase of BaTiO3 single crystals
DOI:10.1063/1.3605494  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Wang, Y. L.;He, Z. B.;Damjanovic, D.;Tagantsev, A. K.;Deng, G. C.;Setter, N.;
7:2:3:76     Scaling and disorder analysis of local I-V curves from ferroelectric thin films of lead zirconate titanate
DOI:10.1088/0957-4484/22/25/254031  JN:NANOTECHNOLOGY  PY:2011
  TC:9  AU: Maksymovych, Peter;Pan, Minghu;Yu, Pu;Ramesh, Ramamoorthy;Baddorf, Arthur P.;Kalinin, Sergei V.;
7:2:3:77     Depletion-layer-induced size effects in ferroelectric thin films: A Ginzburg-Landau model study
DOI:10.1103/PhysRevB.86.094104  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Ng, Nathaniel;Ahluwalia, Rajeev;Srolovitz, David J.;
7:2:3:78     Bistability of ferroelectric domain walls: Morphotropic boundary and strain effects
DOI:10.1103/PhysRevB.88.024102  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Yudin, P. V.;Tagantsev, A. K.;Setter, N.;
7:2:3:79     Order-parameter symmetries of domain walls in ferroelectrics and ferroelastics
DOI:10.1103/PhysRevB.89.134104  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Toledano, Pierre;Guennou, Mael;Kreisel, Jens;
7:2:3:80     Compliant ferroelastic domains in epitaxial Pb(Zr, Ti)O-3 thin films
DOI:10.1063/1.4874835  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Feigl, L. l;McGilly, L. J.;Sandu, C. S.;Setter, N.;
7:2:3:81     Persistent conductive footprints of 109 degrees domain walls in bismuth ferrite films
DOI:10.1063/1.4869851  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Stolichnov, I.;Iwanowska, M.;Colla, E.;Ziegler, B.;Gaponenko, I.;Paruch, P.;Huijben, M.;Rijnders, G.;Setter, N.;
7:2:3:82     Electrical conduction in nanodomains in congruent lithium tantalate single crystal
DOI:10.1063/1.4863754  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Cho, Yasuo;
7:2:3:83     Impact of Strain Effects on the Stability of Ising Walls in Ferroelectrics
DOI:10.1080/00150193.2012.744213  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Yudin, P. V.;Tagantsev, A. K.;Setter, N.;
7:2:3:84     Nanoscale Probing of High Photovoltages at 109 degrees Domain Walls
DOI:10.1080/00150193.2012.678156  JN:FERROELECTRICS  PY:2012
  TC:8  AU: Seidel, J.;Yang, S-Y;Alarcon-Llado, E.;Ager, J. W., III;Ramesh, R.;
7:2:3:85     Conducting Jahn-Teller domain walls in undoped manganites
DOI:10.1103/PhysRevB.81.245122  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Salafranca, Juan;Yu, Rong;Dagotto, Elbio;
7:2:3:86     EXAFS evidence for a primary Zn-Li dopant in LiNbO3
DOI:10.1103/PhysRevB.85.064107  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Bridges, F.;Castillo-Torres, J.;Car, B.;Medling, S.;Kozina, M.;
7:2:3:87     Shape of ferroelectric domains in LiNbO3 and LiTaO3 from defect/domain-wall interactions
DOI:10.1063/1.3560343  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Lee, Donghwa;Xu, Haixuan;Dierolf, Volkmar;Gopalan, Venkatraman;Phillpot, Simon R.;
7:2:3:88     Theory of Electric Polarization in Multiorbital Mott Insulators
DOI:10.1103/PhysRevLett.106.047204  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:6  AU: Mostovoy, Maxim;Nomura, Kentaro;Nagaosa, Naoto;
7:2:3:89     Anisotropic conductance at improper ferroelectric domain walls
DOI:10.1038/NMAT3249  JN:NATURE MATERIALS  PY:2012
  TC:86  AU: Meier, D.;Seidel, J.;Cano, A.;Delaney, K.;Kumagai, Y.;Mostovoy, M.;Spaldin, N. A.;Ramesh, R.;Fiebig, M.;
7:2:3:90     Local On/Off Currents in BiFeO3 Thin Films Modulated by Bipolar Polarization Orientations
DOI:10.1080/10584587.2012.665018  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Jiang, A. Q.;Chen, M. C.;Yu, H. H.;Tang, T. A.;
7:2:3:91     Atomic structure of steps on 180 degrees ferroelectric domain walls in PbTiO3
DOI:10.1063/1.3501050  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Angoshtari, Arzhang;Yavari, Arash;
7:2:3:92     Quasi-one-dimensional domain walls in ferroelectric ceramics: Evidence from domain dynamics and wall roughness measurements
DOI:10.1063/1.3624810  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Pertsev, N. A.;Kiselev, D. A.;Bdikin, I. K.;Kosec, M.;Kholkin, A. L.;
7:2:3:93     Multifractal scaling of flux penetration in the iron-based superconductor Ba(Fe0.93Co0.07)(2)As-2
DOI:10.1103/PhysRevB.87.104517  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Grisolia, Mathieu N.;van der Beek, Cornelis J.;Fasano, Yanina;Forget, Anne;Colson, Dorothee;
7:2:3:94     The influence of notches on domain dynamics in ferroelectric nanowires
DOI:10.1063/1.3300638  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: McMillen, M.;McQuaid, R. G. P.;Haire, S. C.;McLaughlin, C. D.;Chang, L. W.;Schilling, A.;Gregg, J. M.;
7:2:3:95     Effect of strain and oxygen vacancies on the structure of 180 degrees ferroelectric domain walls in PbTiO3
DOI:10.1016/j.commatsci.2010.01.006  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2010
  TC:7  AU: Angoshtari, Arzhang;Yavari, Arash;
7:2:3:96     Broken Symmetry, Ferroic Phase Transitions and Multifunctional Materials
DOI:10.1080/10584587.2011.616380  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Saxena, Avadh;
7:2:3:97     On the role of grain boundaries in nanocrystalline gamma-Fe2O3 under high pressure
DOI:10.1063/1.3695459  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Zhang, Dongmei;Zhang, Yongsheng;Gao, Yang;Han, Yonghao;Gao, Chunxiao;Ma, Yanzhang;Cheng, Chunxiao;Yu, Ke;
7:2:3:98     Domain walls of ferroelectric BaTiO3 within the Ginzburg-Landau-Devonshire phenomenological model (vol 81, 144125, 2010)
DOI:10.1103/PhysRevB.84.139906  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Marton, P.;Rychetsky, I.;Hlinka, J.;
7:2:3:99     Bichiral structure of ferroelectric domain walls driven by flexoelectricity (vol 86, 134102, 2012)
DOI:10.1103/PhysRevB.86.139901  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Yudin, P. V.;Tagantsev, A. K.;Eliseev, E. A.;Morozovska, A. N.;Setter, N.;
7:2:3:100     Subsurface nanodomains with in-plane polarization in uniaxial ferroelectrics via scanning force microscopy
DOI:10.1103/PhysRevB.88.174109  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Pertsev, N. A.;Kholkin, A. L.;
7:2:3:101     Bi2SiO5 Doping Concentration Effects on the Electrical Properties of SrBi2Ta2O9 Films
DOI:10.1007/s11664-014-3258-3  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Li, Ming;Zhang, Yang;Shao, Yayun;Zeng, Min;Zhang, Zhang;Gao, Xingsen;Lu, Xubing;Liu, J. -M.;Ishiwara, Hiroshi;
7:2:3:102     High-Symmetry Polarization Domains in Low-Symmetry Ferroelectrics
DOI:10.1021/nl503070f  JN:NANO LETTERS  PY:2014
  TC:1  AU: Lukyanchuk, I.;Sharma, P.;Nakajima, T.;Okamura, S.;Scott, J. F.;Gruverman, A.;
7:2:4:1     Bulk Photovoltaic Effect at Visible Wavelength in Epitaxial Ferroelectric BiFeO3 Thin Films
DOI:10.1002/adma.200902985  JN:ADVANCED MATERIALS  PY:2010
  TC:148  AU: Ji, Wei;Yao, Kui;Liang, Yung C.;
7:2:4:2     Mechanism of the Switchable Photovoltaic Effect in Ferroelectric BiFeO3
DOI:10.1002/adma.201100805  JN:ADVANCED MATERIALS  PY:2011
  TC:78  AU: Yi, H. T.;Choi, T.;Choi, S. G.;Oh, Y. S.;Cheong, S. -W.;
7:2:4:3     Efficient Photovoltaic Current Generation at Ferroelectric Domain Walls
DOI:10.1103/PhysRevLett.107.126805  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:77  AU: Seidel, Jan;Fu, Deyi;Yang, Seung-Yeul;Alarcon-Llado, Esther;Wu, Junqiao;Ramesh, Ramamoorthy;Ager, Joel W., III;
7:2:4:4     Arising applications of ferroelectric materials in photovoltaic devices
DOI:10.1039/c3ta14188h  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:36  AU: Yuan, Yongbo;Xiao, Zhengguo;Yang, Bin;Huang, Jinsong;
7:2:4:5     Effects of annealing temperature on the microstructure, optical, ferro electric and photovoltaic properties of BiFeO3 thin films prepared by sol-gel method
DOI:10.1016/j.ceramint.2013.04.058  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:11  AU: Lin, Zebin;Cai, Wei;Jiang, Weihai;Fu, Chunlin;Li, Chun;Song, Yunxia;
7:2:4:6     Effect of top electrodes on photovoltaic properties of polycrystalline BiFeO3 based thin film capacitors
DOI:10.1088/0957-4484/22/19/195201  JN:NANOTECHNOLOGY  PY:2011
  TC:65  AU: Chen, Bin;Li, Mi;Liu, Yiwei;Zuo, Zhenghu;Zhuge, Fei;Zhan, Qing-Feng;Li, Run-Wei;
7:2:4:7     Resistance switching and white-light photovoltaic effects in BiFeO3/Nb-SrTiO3 heterojunctions
DOI:10.1063/1.3584031  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:40  AU: Qu, T. L.;Zhao, Y. G.;Xie, D.;Shi, J. P.;Chen, Q. P.;Ren, T. L.;
7:2:4:8     BiFeO3/TiO2 Nanotube Arrays Composite Electrode: Construction, Characterization, and Enhanced Photoelectrochemical Properties
DOI:10.1021/am404774z  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:17  AU: Zhu, Ashu;Zhao, Qidong;Li, Xinyong;Shi, Yong;
7:2:4:9     Photovoltaic enhancement based on improvement of ferroelectric property and band gap in Ti-doped bismuth ferrite thin films
DOI:10.1016/j.jallcom.2014.08.011  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Cai, Wei;Fu, Chunlin;Gao, Rongli;Jiang, Weihai;Deng, Xiaoling;Chen, Gang;
7:2:4:10     Enhanced photovoltaic properties in graphene/polycrystalline BiFeO3/Pt heterojunction structure
DOI:10.1063/1.3644134  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:29  AU: Zang, Yongyuan;Xie, Dan;Wu, Xiao;Chen, Yu;Lin, Yuxuan;Li, Mohan;Tian, He;Li, Xiao;Li, Zhen;Zhu, Hongwei;Ren, Tianling;Plant, David;
7:2:4:11     High-Efficiency Ferroelectric-Film Solar Cells with an n-type Cu2O Cathode Buffer Layer
DOI:10.1021/nl300009z  JN:NANO LETTERS  PY:2012
  TC:37  AU: Cao, Dawei;Wang, Chunyan;Zheng, Fengang;Dong, Wen;Fang, Liang;Shen, Mingrong;
7:2:4:12     Ferroelectric photovoltaic properties of Ce and Mn codoped BiFeO3 thin film
DOI:10.1063/1.4859575  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:6  AU: Gupta, Surbhi;Tomar, Monika;Gupta, Vinay;
7:2:4:13     Evidence of bulk photovoltaic effect and large tensor coefficient in ferroelectric BiFeO3 thin films
DOI:10.1103/PhysRevB.84.094115  JN:PHYSICAL REVIEW B  PY:2011
  TC:22  AU: Ji, Wei;Yao, Kui;Liang, Yung C.;
7:2:4:14     Photovoltaic properties of Bi2FeCrO6 epitaxial thin films
DOI:10.1063/1.3590270  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:27  AU: Nechache, R.;Harnagea, C.;Licoccia, S.;Traversa, E.;Ruediger, A.;Pignolet, A.;Rosei, F.;
7:2:4:15     Ultrafast Photovoltaic Response in Ferroelectric Nanolayers
DOI:10.1103/PhysRevLett.108.087601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:20  AU: Daranciang, Dan;Highland, Matthew J.;Wen, Haidan;Young, Steve M.;Brandt, Nathaniel C.;Hwang, Harold Y.;Vattilana, Michael;Nicoul, Matthieu;Quirin, Florian;Goodfellow, John;Qi, Tingting;Grinberg, Ilya;Fritz, David M.;Cammarata, Marco;Zhu, Diling;Lemke, Henrik T.;Walko, Donald A.;Dufresne, Eric M.;Li, Yuelin;Larsson, Jorgen;Reis, David A.;Sokolowski-Tinten, Klaus;Nelson, Keith A.;Rappe, Andrew M.;Fuoss, Paul H.;Stephenson, G. Brian;Lindenberg, Aaron M.;
7:2:4:16     Evidence for oxygen vacancy or ferroelectric polarization induced switchable diode and photovoltaic effects in BiFeO3 based thin films
DOI:10.1088/0957-4484/24/27/275201  JN:NANOTECHNOLOGY  PY:2013
  TC:25  AU: Guo, Yiping;Guo, Bing;Dong, Wen;Li, Hua;Liu, Hezhou;
7:2:4:17     p-i-n Heterojunctions with BiFeO(3)Perovskite Nanoparticles and p-and n-Type Oxides: Photovoltaic Properties
DOI:10.1021/am506066m  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:3  AU: Chatterjee, Soumyo;Bera, Abhijit;Pal, Amlan J.;
7:2:4:18     Interface controlled photovoltaic effect in epitaxial Pb(Zr,Ti)O-3 films with tetragonal structure
DOI:10.1063/1.3624738  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Pintilie, L.;Dragoi, C.;Pintilie, I.;
7:2:4:19     First Principles Calculation of the Shift Current Photovoltaic Effect in Ferroelectrics
DOI:10.1103/PhysRevLett.109.116601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:16  AU: Young, Steve M.;Rappe, Andrew M.;
7:2:4:20     Enhancement of Photocurrent in Ferroelectric Films Via the Incorporation of Narrow Bandgap Nanoparticles
DOI:10.1002/adma.201104078  JN:ADVANCED MATERIALS  PY:2012
  TC:24  AU: Yang, Xiaoluan;Su, Xiaodong;Shen, Mingrong;Zheng, Fengang;Xin, Yu;Zhang, Lu;Hua, Muchuan;Chen, Yajie;Harris, V. G.;
7:2:4:21     Understanding the nature of remnant polarization enhancement, coercive voltage offset and time-dependent photocurrent in ferroelectric films irradiated by ultraviolet light
DOI:10.1039/c2jm32102e  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:5  AU: Cao, Dawei;Wang, Chunyan;Zheng, Fengang;Fang, Liang;Dong, Wen;Shen, Mingrong;
7:2:4:22     Spatially Resolved Photodetection in Leaky Ferroelectric BiFeO3
DOI:10.1002/adma.201102816  JN:ADVANCED MATERIALS  PY:2012
  TC:13  AU: Lee, Won-Mo;Sung, Ji Ho;Chu, Kanghyun;Moya, Xavier;Lee, Donghun;Kim, Cheol-Joo;Mathur, Neil D.;Cheong, S. -W.;Yang, C. -H.;Jo, Moon-Ho;
7:2:4:23     Enhanced open voltage of BiFeO3 polycrystalline film by surface modification of organolead halide perovskite
DOI:10.1063/1.4888912  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhao, Pengjun;Bian, Liang;Wang, Lei;Xu, Jinbao;Chang, Aimin;
7:2:4:24     Switchable photovoltaic response from polarization modulated interfaces in BiFeO3 thin films
DOI:10.1063/1.4870972  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Fang, Liang;You, Lu;Zhou, Yang;Ren, Peng;Lim, Zhi Shiuh;Wang, Junling;
7:2:4:25     Investigation of the improved performance in a graphene/polycrystalline BiFeO3/Pt photovoltaic heterojunction: Experiment, modeling, and application
DOI:10.1063/1.4748876  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Zang, Yongyuan;Xie, Dan;Chen, Yu;Wu, Xiao;Ren, Tianling;Zhu, Hongwei;Cao, Jiang-Li;Plant, David;
7:2:4:26     Above 1% efficiency of a ferroelectric solar cell based on the Pb(Zr, Ti)O-3 film
DOI:10.1039/c3ta13724d  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:5  AU: Zheng, Fengang;Xin, Yu;Huang, Wen;Zhang, Jinxing;Wang, Xiaofeng;Shen, Mingrong;Dong, Wen;Fang, Liang;Bai, Yongbin;Shen, Xiaoqing;Hao, Jianhua;
7:2:4:27     Effects of Nd-doping on optical and photovoltaic properties of barium titanate thin films prepared by sol-gel method
DOI:10.1016/j.materresbull.2013.04.048  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:10  AU: Jiang, Weihai;Cai, Wei;Lin, Zebin;Fu, Chunlin;
7:2:4:28     Interface effect on the photocurrent: A comparative study on Pt sandwiched (Bi3.7Nd0.3)Ti3O12 and Pb(Zr0.2Ti0.8)O-3 films
DOI:10.1063/1.3427500  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:19  AU: Cao, Dawei;Xu, Jie;Fang, Liang;Dong, Wen;Zheng, Fengang;Shen, Mingrong;
7:2:4:29     Photovoltaic property of BiFeO3 thin films with 109 degrees domains
DOI:10.1063/1.3641905  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:25  AU: Guo, Rui;You, Lu;Chen, Lang;Wu, Di;Wang, Junling;
7:2:4:30     Photovoltaic property of domain engineered epitaxial BiFeO3 films
DOI:10.1063/1.4905000  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhou, Yang;Fang, Liang;You, Lu;Ren, Peng;Wang, Le;Wang, Junling;
7:2:4:31     Ultraviolet photovoltaic effect in BiFeO3/Nb-SrTiO3 heterostructure
DOI:10.1063/1.4759049  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Li, H.;Jin, K. X.;Yang, S. H.;Wang, J.;He, M.;Luo, B. C.;Wang, J. Y.;Chen, C. L.;Wu, T.;
7:2:4:32     Enhanced photocurrent in Pb(Zr0.2Ti0.8)O-3 ferroelectric film by artificially introducing asymmetrical interface Schottky barriers
DOI:10.1016/j.matchemphys.2012.04.041  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:14  AU: Zhang, Peng;Cao, Dawei;Wang, Chunyan;Shen, Mingrong;Su, Xiaodong;Fang, Liang;Dong, Wen;Zheng, Fengang;
7:2:4:33     Tunable photovoltaic effects in transparent Pb(Zr-0.53,Ti-0.47)O-3 capacitors
DOI:10.1063/1.4709406  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:12  AU: Chen, Bin;Zuo, Zhenghu;Liu, Yiwei;Zhan, Qing-Feng;Xie, Yali;Yang, Huali;Dai, Guohong;Li, Zhixiang;Xu, Gaojie;Li, Run-Wei;
7:2:4:34     Dielectric and optical properties of BiFeO3-(Na0.5Bi0.5)TiO3 thin films deposited on Si substrate using LaNiO3 as buffer layer for photovoltaic devices
DOI:10.1016/j.jallcom.2011.10.011  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Qin, Wei;Guo, Yiping;Guo, Bing;Gu, Mingyuan;
7:2:4:35     Calcium-doping effects on photovoltaic response and structure in multiferroic BiFeO3 ceramics
DOI:10.1063/1.4823856  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Tu, C. S.;Hung, C. -M.;Xu, Z. -R.;Schmidt, V. H.;Ting, Y.;Chien, R. R.;Peng, Y. -T.;Anthoninappen, J.;
7:2:4:36     Enhanced photovoltaic properties in polycrystalline BiFeO3 thin films with rhombohedral perovskite structure deposited on fluorine doped tin oxide substrates
DOI:10.1016/j.matlet.2012.08.006  JN:MATERIALS LETTERS  PY:2012
  TC:17  AU: Dong, Wen;Guo, Yiping;Guo, Bing;Liu, Hongyan;Li, Hua;Liu, Hezhou;
7:2:4:37     Local Mapping of Generation and Recombination Lifetime in BiFeO3 Single Crystals by Scanning Probe Photoinduced Transient Spectroscopy
DOI:10.1021/nl300618e  JN:NANO LETTERS  PY:2012
  TC:15  AU: Alexe, Marin;
7:2:4:38     Single ferroelectric-domain photovoltaic switch based on lateral BiFeO3 cells
DOI:10.1038/am.2013.1  JN:NPG ASIA MATERIALS  PY:2013
  TC:5  AU: Sung, Ji Ho;Lee, Won-Mo;Lee, Jin Hong;Chu, Kanghyun;Lee, Donghun;Moya, Xavier;Mathur, Neil D.;Yang, Chan-Ho;Park, Jae-Hoon;Jo, Moon-Ho;
7:2:4:39     Photovoltaic effect in a wide-area semiconductor-ferroelectric device
DOI:10.1063/1.3628318  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:16  AU: Katiyar, R. K.;Kumar, A.;Morell, G.;Scott, J. F.;Katiyar, R. S.;
7:2:4:40     Complex transport behavior accompanying domain switching in La0.1Bi0.9FeO3 sandwiched capacitors
DOI:10.1063/1.4757987  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Gao, R. L.;Chen, Y. S.;Sun, J. R.;Zhao, Y. G.;Li, J. B.;Shen, B. G.;
7:2:4:41     Switchable photovoltaic effect in bilayer graphene/BiFeO3/Pt heterostructures
DOI:10.1063/1.4897627  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Katiyar, Rajesh K.;Misra, Pankaj;Mendoza, Frank;Morell, Gerardo;Katiyar, Ram S.;
7:2:4:42     Studies of the switchable photovoltaic effect in co-substituted BiFeO3 thin films
DOI:10.1063/1.4900755  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Katiyar, Rajesh K.;Sharma, Yogesh;Misra, Pankaj;Puli, Venkata S.;Sahoo, Satyaprakash;Kumar, Ashok;Scott, James F.;Morell, Gerardo;Weiner, Brad R.;Katiyar, Ram S.;
7:2:4:43     First-Principles Calculation of the Bulk Photovoltaic Effect in Bismuth Ferrite
DOI:10.1103/PhysRevLett.109.236601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:12  AU: Young, Steve M.;Zheng, Fan;Rappe, Andrew M.;
7:2:4:44     Dynamics of Photogenerated Surface Charge on BiFeO3 Films
DOI:10.1021/nn204604m  JN:ACS NANO  PY:2012
  TC:11  AU: Yan, Feng;Chen, Guannan;Lu, Li;Spanier, Jonathan E.;
7:2:4:45     Enhanced Photovoltaic Effect in BiVO4 Semiconductor by Incorporation with an Ultrathin BiFeO3 Ferroelectric Layer
DOI:10.1021/am4004182  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:10  AU: Dong, Wen;Guo, Yiping;Guo, Bing;Li, Hua;Liu, Hezhou;Joel, Thia Weikang;
7:2:4:46     The Application of Bismuth-Based Oxides in Organic-Inorganic Hybrid Photovoltaic Devices
DOI:10.1111/j.1551-2916.2012.05088.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Liu, Zhike;Yan, Feng;
7:2:4:47     Photocurrent of lead-free (K0.5Na0.5)(Mn0.005Nb0.995)O-3 ferroelectric nanotubes
DOI:10.1063/1.4732455  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Park, Jungmin;Ahn, Chang Won;Kim, Ill Won;
7:2:4:48     Photoelectric Effects in Single Domain BiFeO3 Crystals
DOI:10.1002/adfm.201201150  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:19  AU: Moubah, Reda;Rousseau, Olivier;Colson, Dorothee;Artemenko, Alla;Maglione, Mario;Viret, Michel;
7:2:4:49     Interface layer thickness effect on the photocurrent of Pt sandwiched polycrystalline ferroelectric Pb(Zr, Ti)O-3 films
DOI:10.1063/1.3488829  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Cao, Dawei;Zhang, Hui;Fang, Liang;Dong, Wen;Zheng, Fengang;Shen, Mingrong;
7:2:4:50     Electro-photo double modulation on the resistive switching behavior and switchable photoelectric effect in BiFeO3 films
DOI:10.1063/1.4812825  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Wang, Le;Jin, Kui-juan;Ge, Chen;Wang, Can;Guo, Hai-zhong;Lu, Hui-bin;Yang, Guo-zhen;
7:2:4:51     Enhanced photoresponse in BiFeO3/SrRuO3 heterostructure
DOI:10.1016/j.jallcom.2014.04.099  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Katiyar, Rajesh K.;Misra, Pankaj;Sahoo, Satyaprakash;Morell, Gerardo;Katiyar, Ram S.;
7:2:4:52     Ferroelectric Photocurrent Effect in Polycrystalline Lead-Free (K0.5Na0.5)(Mn0.005Nb0.995)O3 Thin Film
DOI:10.1111/j.1551-2916.2012.05430.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Park, Jungmin;Won, Sung Sik;Ahn, Chang Won;Kim, Ill Won;
7:2:4:53     About the complex relation between short-circuit photocurrent, imprint and polarization in ferroelectric thin films
DOI:10.1063/1.3445877  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Pintilie, L.;Stancu, V.;Vasile, E.;Pintilie, I.;
7:2:4:54     Photo-induced electric phenomena in antiferromagnetic BiFeO3 ceramics
DOI:10.1063/1.4794743  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Hung, C. -M.;Jiang, M. -D.;Anthoninappen, J.;Tu, C. -S.;
7:2:4:55     Effect of diamagnetic barium substitution on magnetic and photovoltaic properties in multiferroic BiFeO3
DOI:10.1063/1.4862381  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Hung, C. -M.;Tu, C. S.;Xu, Z. -R.;Chang, L. -Y.;Schmidt, V. H.;Chien, R. R.;Chang, W. C.;
7:2:4:56     Polarization effect on the photocurrent of Pt sandwiched multi-crystalline ferroelectric films
DOI:10.1016/j.matchemphys.2011.04.081  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:10  AU: Cao, Dawei;Zhang, Hui;Fang, Liang;Dong, Wen;Zheng, Fengang;Shen, Mingrong;
7:2:4:57     Influence of work-function of top electrodes on the photovoltaic characteristics of Pb0.95La0.05Zr0.54Ti0.46O3 thin film capacitors
DOI:10.1063/1.4705425  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Harshan, V. N.;Kotru, Sushma;
7:2:4:58     Light-Induced Modulation in Resistance Switching of Carbon Nanotube/BiFeO3/Pt Heterostructure
DOI:10.1080/10584587.2012.664985  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:2  AU: Chen, Yu;Zang, Yongyuan;Xie, Dan;Wu, Xiao;Ren, Tianling;Wei, Jinquan;Wang, Kunlin;Wu, Dehai;Zhu, Hongwei;
7:2:4:59     Photovoltaic property of sputtered BiFeO3 thin films
DOI:10.1016/j.jallcom.2013.05.161  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:8  AU: Chang, H. W.;Yuan, F. T.;Yu, Y. C.;Chen, P. C.;Wang, C. R.;Tu, C. S.;Jen, S. U.;
7:2:4:60     The effect of polarization fatigue process and light illumination on the transport behavior of Bi0.9La0.1FeO3 sandwiched capacitor
DOI:10.1063/1.4804308  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Gao, R. L.;Chen, Y. S.;Sun, J. R.;Zhao, Y. G.;Li, J. B.;Shen, B. G.;
7:2:4:61     Photovoltaic effect of lead-free (Na0.82K0.18)(0.5)Bi4.5Ti4O15 ferroelectric thin film using Pt and indium tin oxide top electrodes
DOI:10.1063/1.4862401  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Woo, Won Seok;Won, Sung Sik;Ahn, Chang Won;Chae, Song A.;Ullah, Aman;Kim, Ill Won;
7:2:4:62     Photovoltaic properties of BiFeO3 thin film capacitors by using Al-doped zinc oxide as top electrode
DOI:10.1016/j.matlet.2012.10.031  JN:MATERIALS LETTERS  PY:2013
  TC:15  AU: Dong, Wen;Guo, Yiping;Guo, Bing;Liu, Hongyan;Li, Hua;Liu, Hezhou;
7:2:4:63     Effect of electrode configurations on the process-induced imprint behavior of epitaxial Pb(Zr0.52Ti0.48)O-3 capacitors
DOI:10.1063/1.3458599  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Chen, Feng;Tan, Xuelian;Huang, Zhen;Xuan, Xiaofeng;Wu, Wenbin;
7:2:4:64     Oxygen vacancies induced switchable and nonswitchable photovoltaic effects in Ag/Bi0.9La0.1FeO3/La0.7Sr0.3MnO3 sandwiched capacitors
DOI:10.1063/1.4862793  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Gao, R. L.;Yang, H. W.;Chen, Y. S.;Sun, J. R.;Zhao, Y. G.;Shen, B. G.;
7:2:4:65     Photovoltaic effect in an indium-tin-oxide/ZnO/BiFeO3/Pt heterostructure
DOI:10.1063/1.4899146  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Fan, Zhen;Yao, Kui;Wang, John;
7:2:4:66     Effect of cooling oxygen pressure on the photoconductivity in Bi0.9La0.1FeO3 thin films
DOI:10.1016/j.jallcom.2013.12.237  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Gao, R. L.;Yang, H. W.;Chen, Y. S.;Sun, J. R.;Zhao, Y. G.;Shen, B. G.;
7:2:4:67     Surface dominant photoresponse of multiferroic BiFeO3 nanowires under sub-bandgap illumination
DOI:10.1088/0957-4484/24/50/505710  JN:NANOTECHNOLOGY  PY:2013
  TC:5  AU: Prashanthi, Kovur;Gaikwad, Ravi;Thundat, Thomas;
7:2:4:68     Semiconducting ferroelectric perovskites with intermediate bands via B-site Bi5+ doping
DOI:10.1103/PhysRevB.90.075153  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Jiang, Lai;Grinberg, Ilya;Wang, Fenggong;Young, Steve M.;Davies, Peter K.;Rappe, Andrew M.;
7:2:4:69     Ferroelectric and photovoltaic properties of transition metal doped Pb(Zr0.14Ti0.56Ni0.30)O3-delta thin films
DOI:10.1063/1.4868380  JN:AIP ADVANCES  PY:2014
  TC:3  AU: Kumari, Shalini;Ortega, Nora;Kumar, Ashok;Scott, J. F.;Katiyar, R. S.;
7:2:4:70     Polar properties of hydrothermally synthesized BiFeO3 thin films
DOI:10.1007/s00339-013-7952-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:4  AU: Velasco-Davalos, Ivan A.;Moretti, Mathieu;Nicklaus, Mischa;Nauenheim, Christian;Li, Shun;Nechache, Riad;Gomez-Yanez, Carlos;Ruediger, Andreas;
7:2:4:71     Detection of electrically formed photosensitive area in Ca-doped BiFeO3 thin films
DOI:10.1063/1.4774381  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Bharathi, K. Kamala;Lee, Won-Mo;Sung, Ji Ho;Lim, Ji Soo;Kim, Seung Jin;Chu, Kanghyun;Park, Jung Won;Song, Jong Hyun;Jo, Moon-Ho;Yang, Chan-Ho;
7:2:4:72     Effect of interface configurations on the dynamic scaling behavior of Pb(Zr0.53Ti0.47)O-3 thin films
DOI:10.1063/1.4867506  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Kui;Sama, Nossikpendou;Li, Tao;Remiens, Denis;Du, Gang;Dong, Xianlin;Wang, Genshui;
7:2:4:73     Light-Induced Modulation in Resistance Switching of Carbon Nanotube/BiFeO3/Pt Heterostructure
DOI:10.1080/10584587.2012.673986  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Chen, Yu;Zang, Yongyuan;Xie, Dan;Wu, Xiao;Ren, Tianling;Wei, Jinquan;Wang, Kunlin;Wu, Dehai;Zhu, Hongwei;
7:2:4:74     Enhancement of photovoltaic properties with Nb modified (Bi, Na) TiO3-BaTiO3 ferroelectric ceramics
DOI:10.1016/j.jallcom.2013.10.207  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Chen, L.;Luo, B. C.;Chan, N. Y.;Dai, J. Y.;Hoffman, M.;Li, S.;Wang, D. Y.;
7:2:4:75     Photovoltaic effects in Bi4Ti3O12 thin film prepared by a sol-gel method
DOI:10.1016/j.matlet.2014.03.146  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Zhang, Y. G.;Zheng, H. W.;Zhang, J. X.;Yuan, G. L.;Gao, W. X.;Gu, Y. Z.;Diao, C. L.;Liu, Y. F.;Zhang, W. F.;
7:2:4:76     Photovoltaic effect of TiO2 thick films with an ultrathin BiFeO3 as buffer layer
DOI:10.1007/s00339-014-8536-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Wu, Fen;Song, Linyu;Guo, Yiping;Jin, Song;Bi, Enbing;Chen, Han;Duan, Huanan;Li, Hua;Liu, Hezhou;Kang, Hongmei;
7:2:4:77     Characteristics of Pt/BiFeO3/TiO2/Si capacitors with TiO2 layer formed by liquid-delivery metal organic chemical vapor deposition
DOI:10.1063/1.3490712  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Xie, Dan;Han, Xueguang;Li, Rui;Ren, Tianling;Liu, Litian;Zhao, Yonggang;
7:2:4:78     A battery-less photo-detector enabled with simultaneous ferroelectric sensing and energy harnessing mechanism
DOI:10.1063/1.4819845  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Lai, Szu Cheng;Yao, Kui;Chen, Yi Fan;
7:2:4:79     Epitaxial ferroelectric BiFeO3 thin films for unassisted photocatalytic water splitting
DOI:10.1063/1.4817907  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Ji, Wei;Yao, Kui;Lim, Yee-Fun;Liang, Yung C.;Suwardi, Ady;
7:2:4:80     Field-effect BaTiO3-Si solar cells
DOI:10.1063/1.4869556  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wang, Wentao;Liu, Fude;Lau, Chor Man;Wang, Lei;Yang, Guandong;Zheng, Dawei;Li, Zhigang;
7:2:4:81     Characterization of ferroelectric material properties of multifunctional lead zirconate titanate for energy harvesting sensor nodes
DOI:10.1063/1.3524271  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Marinkovic, Bozidar;Kaya, Tolga;Koser, Hur;
7:2:4:82     Prediction of a Linear Spin Bulk Photovoltaic Effect in Antiferromagnets
DOI:10.1103/PhysRevLett.110.057201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Young, Steve M.;Zheng, Fan;Rappe, Andrew M.;
7:2:4:83     Optical rectification and current injection in unbiased semiconductors
DOI:10.1103/PhysRevB.82.235204  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Nastos, F.;Sipe, J. E.;
7:2:4:84     Photovoltaic properties of Aurivillius phase Bi5FeTi3O15 thin films grown by pulsed laser deposition
DOI:10.1063/1.4893784  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kooriyattil, Sudheendran;Katiyar, Rajesh K.;Pavunny, Shojan P.;Morell, Gerardo;Katiyar, Ram S.;
7:2:4:85     Ferroelectric-semiconductor photovoltaics: Non-PN junction solar cells
DOI:10.1063/1.4868304  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Liu, Fude;Wang, Wentao;Wang, Lei;Yang, Guandong;
7:2:4:86     Mechanism of polarization fatigue in BiFeO3: The role of Schottky barrier
DOI:10.1063/1.4861231  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Zhou, Yang;Zou, Xi;You, Lu;Guo, Rui;Lim, Zhi Shiuh;Chen, Lang;Yuan, Guoliang;Wang, Junling;
7:2:4:87     Temperature Control of P(VDF-TrFE) Copolymer Thin Films
DOI:10.1080/10584587.2012.694748  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:2  AU: Feng, Tingting;Xie, Dan;Zang, Yongyuan;Wu, Xiao;Ren, Tianling;Pan, Wei;
7:2:4:88     Optical transitions in magnetoelectric Ga0.6Fe1.4O3 from 0.73 to 6.45 eV
DOI:10.1116/1.4721649  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2012
  TC:5  AU: Choi, Sukgeun;Lefevre, Christophe;Roulland, Francois;Meny, Christian;Viart, Nathalie;To, Bobby;Shafer, Devyn E.;Shin, Ranhee;Lee, Jihye;Jo, William;
7:2:4:89     Photocurrent Properties of BiFeO3 Thin Films Prepared by Chemical Solution Deposition
DOI:10.1080/00150193.2013.842086  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Makino, Narimichi;Sakamoto, Wataru;Yoshida, Kenji;Moriya, Makoto;Yogo, Toshinobu;
7:2:4:90     Comparative Study on Structural and Ferroelectric Properties of Dual-Site Rare-Earth Ions Substituted Multiferroelectric BiFeO3
DOI:10.1080/10584587.2012.660435  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:2  AU: Zang, Yongyuan;Xie, Dan;Chen, Yu;Li, Mohan;Han, Xueguang;Ren, Tianling;Plant, David;
7:2:4:91     Effect of Poling on Photovoltaic Properties in Highly Oriented BiFeO3 Thin Films
DOI:10.1080/10584587.2014.912892  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:1  AU: Katiyar, Rajesh K.;Misra, Pankaj;Morell, Gerardo;Katiyar, Ram S.;
7:2:4:92     High retention of the polarization and depolarization field in polycrystalline metal/Pb(ZrTi)O-3/metal capacitors
DOI:10.1063/1.3499645  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Delimova, L. A.;Yuferev, V. S.;
7:2:4:93     ELECTRONICS Electronic materials through time
DOI:10.1038/nmat3407  JN:NATURE MATERIALS  PY:2012
  TC:1  AU: Keimer, B.;Maier, J.;Mannhart, J.;
7:2:4:94     Photovoltaic effect in a wide-area semiconductor-ferroelectric device (vol 99, 092906, 2011)
DOI:10.1063/1.3651483  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Katiyar, R. K.;Kumar, A.;Morell, G.;Scott, J. F.;Katiyar, R. S.;
7:2:4:95     A ferroelectric-semiconductor-coupled solar cell with tunable photovoltage
DOI:10.1063/1.4794902  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Huang, Fang;Liu, Xiangxin;
7:2:4:96     Study of Ferroelectic Properties in Ferroelectric/High-k Dielectric Bilayers
DOI:10.1080/00150191003672834  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Ma, Z.;Jiang, A. Q.;
7:2:4:97     Influence of Ti substitution on the electrical properties of metal-ferroelectric (BiFeO3)-insulator (HfO2)-silicon structures for nonvolatile memory applications
DOI:10.1063/1.3581202  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Juan, Trevor Pi-Chun;Liu, Yu-Wei;
7:2:4:98     Ultraviolet-light-induced multi-physics behaviors of 0-3 polarized transparent PLZT plates: II. Finite element analysis and validation
DOI:10.1088/0964-1726/20/11/115005  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:2  AU: Luo, Quantian;Tong, Liyong;
7:2:5:1     A Resistive Memory in Semiconducting BiFeO3 Thin-Film Capacitors
DOI:10.1002/adma.201004317  JN:ADVANCED MATERIALS  PY:2011
  TC:132  AU: Jiang, An Quan;Wang, Can;Jin, Kui Juan;Liu, Xiao Bing;Scott, James F.;Hwang, Cheol Seong;Tang, Ting Ao;Bin Lu, Hui;Yang, Guo Zhen;
7:2:5:2     Switchable diode effect and ferroelectric resistive switching in epitaxial BiFeO3 thin films
DOI:10.1063/1.3589814  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:93  AU: Wang, Can;Jin, Kui-juan;Xu, Zhong-tang;Wang, Le;Ge, Chen;Lu, Hui-bin;Guo, Hai-zhong;He, Meng;Yang, Guo-zhen;
7:2:5:3     Polarity control of carrier injection at ferroelectric/metal interfaces for electrically switchable diode and photovoltaic effects
DOI:10.1103/PhysRevB.84.125305  JN:PHYSICAL REVIEW B  PY:2011
  TC:52  AU: Lee, D.;Baek, S. H.;Kim, T. H.;Yoon, J. -G.;Folkman, C. M.;Eom, C. B.;Noh, T. W.;
7:2:5:4     Resistance switching in polycrystalline BiFeO3 thin films
DOI:10.1063/1.3467838  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:58  AU: Yin, Kuibo;Li, Mi;Liu, Yiwei;He, Congli;Zhuge, Fei;Chen, Bin;Lu, Wei;Pan, Xiaoqing;Li, Run-Wei;
7:2:5:5     Impact of Bi Deficiencies on Ferroelectric Resistive Switching Characteristics Observed at p-Type Schottky-Like Pt/Bi1-dFeO3 Interfaces
DOI:10.1002/adfm.201102883  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:54  AU: Tsurumaki, Atsushi;Yamada, Hiroyuki;Sawa, Akihito;
7:2:5:6     Polarization-controlled Ohmic to Schottky transition at a metal/ferroelectric interface
DOI:10.1103/PhysRevB.88.165139  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Liu, Xiaohui;Wang, Yong;Burton, J. D.;Tsymbal, Evgeny Y.;
7:2:5:7     Bipolar Electric-Field Enhanced Trapping and Detrapping of Mobile Donors in BiFeO3 Memristors
DOI:10.1021/am504871g  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:4  AU: You, Tiangui;Du, Nan;Slesazeck, Stefan;Mikolajick, Thomas;Li, Guodong;Buerger, Danilo;Skorupa, Ilona;Stoecker, Hartmut;Abendroth, Barbara;Beyer, Andreas;Volz, Kerstin;Schmidt, Oliver G.;Schmidt, Heidemarie;
7:2:5:8     Nonvolatile bipolar resistive switching in Au/BiFeO3/Pt
DOI:10.1063/1.3601113  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:46  AU: Shuai, Yao;Zhou, Shengqiang;Buerger, Danilo;Helm, Manfred;Schmidt, Heidemarie;
7:2:5:9     Large Resistive Switching in Ferroelectric BiFeO3 Nano-Island Based Switchable Diodes
DOI:10.1002/adma.201204839  JN:ADVANCED MATERIALS  PY:2013
  TC:46  AU: Hong, Sahwan;Choi, Taekjib;Jeon, Ji Hoon;Kim, Yunseok;Lee, Hosang;Joo, Ho-Young;Hwang, Inrok;Kim, Jin-Soo;Kang, Sung-Oong;Kalinin, Sergei V.;Park, Bae Ho;
7:2:5:10     Nonvolatile resistive switching in metal/La-doped BiFeO3/Pt sandwiches
DOI:10.1088/0957-4484/21/42/425202  JN:NANOTECHNOLOGY  PY:2010
  TC:56  AU: Li, Mi;Zhuge, Fei;Zhu, Xiaojian;Yin, Kuibo;Wang, Jinzhi;Liu, Yiwei;He, Congli;Chen, Bin;Li, Run-Wei;
7:2:5:11     Ferroelectric Schottky diode behavior from a SrRuO3-Pb(Zr0.2Ti0.8)O-3-Ta structure
DOI:10.1103/PhysRevB.82.085319  JN:PHYSICAL REVIEW B  PY:2010
  TC:25  AU: Pintilie, Lucian;Stancu, Viorica;Trupina, L.;Pintilie, Ioana;
7:2:5:12     The conduction mechanism of large on/off ferroelectric diode currents in epitaxial (111) BiFeO3 thin film
DOI:10.1063/1.4804144  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:11  AU: Chen, Zhihui;He, Long;Zhang, Fan;Jiang, Jun;Meng, Jianwei;Zhao, Boyuan;Jiang, Anquan;
7:2:5:13     Carrier accumulation near electrodes in ferroelectric films due to polarization boundary conditions
DOI:10.1063/1.4886576  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Misirlioglu, I. B.;Yildiz, M.;
7:2:5:14     Numerical investigation into the switchable diode effect in metal-ferroelectric-metal structures
DOI:10.1063/1.3624849  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:24  AU: Ge, Chen;Jin, Kui-Juan;Wang, Can;Lu, Hui-Bin;Wang, Cong;Yang, Guo-Zhen;
7:2:5:15     Evolution of the resistive switching in chemical solution deposited-derived BiFeO3 thin films with dwell time and annealing temperature
DOI:10.1063/1.4789265  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Tang, Xianwu;Zhu, Xuebin;Dai, Jianming;Yang, Jie;Chen, Li;Sun, Yuping;
7:2:5:16     Continuous Control of Charge Transport in Bi-Deficient BiFeO3 Films Through Local Ferroelectric Switching
DOI:10.1002/adfm.201201490  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:13  AU: Kim, Tae Heon;Jeon, Byung Chul;Min, Taeyoon;Yang, Sang Mo;Lee, Daesu;Kim, Yong Su;Baek, Seung-Hyub;Saenrang, Wittawat;Eom, Chang-Beom;Song, Tae Kwon;Yoon, Jong-Gul;Noh, Tae Won;
7:2:5:17     Nonvolatile bipolar resistance switching effects in multiferroic BiFeO3 thin films on LaNiO3-electrodized Si substrates
DOI:10.1007/s00339-010-5910-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:36  AU: Chen, Xinman;Wu, Guangheng;Zhang, Hailei;Qin, Ni;Wang, Tao;Wang, Feifei;Shi, Wangzhou;Bao, Dinghua;
7:2:5:18     Ferroelectric memristor based on Pt/BiFeO3/Nb-doped SrTiO3 heterostructure
DOI:10.1063/1.4795145  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:10  AU: Hu, Zhongqiang;Li, Qian;Li, Meiya;Wang, Qiangwen;Zhu, Yongdan;Liu, Xiaolian;Zhao, Xingzhong;Liu, Yun;Dong, Shuxiang;
7:2:5:19     Electrode interface control of the Schottky diode-like behavior in epitaxial Pb(Zr0.2Ti0.8)O-3 thin films: A critical analysis
DOI:10.1063/1.4808464  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Hrib, L. M.;Boni, A. G.;Chirila, C.;Pasuk, I.;Pintilie, I.;Pintilie, L.;
7:2:5:20     Unipolar resistive switching behavior of BiFeO3 thin films prepared by chemical solution deposition
DOI:10.1016/j.tsf.2010.08.004  JN:THIN SOLID FILMS  PY:2010
  TC:35  AU: Chen, Shih-Wei;Wu, Jenn-Ming;
7:2:5:21     Nonpolar resistive switching in Mn-doped BiFeO3 thin films by chemical solution deposition
DOI:10.1063/1.4742897  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:24  AU: Luo, J. M.;Lin, S. P.;Zheng, Yue;Wang, B.;
7:2:5:22     Screening effects in ferroelectric resistive switching of BiFeO3 thin films
DOI:10.1063/1.4875355  JN:APL MATERIALS  PY:2014
  TC:1  AU: Farokhipoor, S.;Noheda, B.;
7:2:5:23     Evidence for a Crucial Role Played by Oxygen Vacancies in LaMnO3 Resistive Switching Memories
DOI:10.1002/smll.201101796  JN:SMALL  PY:2012
  TC:32  AU: Xu, Zhong-tang;Jin, Kui-juan;Gu, Lin;Jin, Yu-ling;Ge, Chen;Wang, Can;Guo, Hai-zhong;Lu, Hui-bin;Zhao, Rui-qiang;Yang, Guo-zhen;
7:2:5:24     Switchable diode effect in ferroelectric thin film: High dependence on poling process and temperature
DOI:10.1063/1.4903772  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Li, Z. X.;Liu, X. L.;Chen, W. J.;Zhang, X. Y.;Wang, Ying;Xiong, W. M.;Zheng, Yue;
7:2:5:25     Annealing effect on the bipolar resistive switching behaviors of BiFeO3 thin films on LaNiO3-buffered Si substrates
DOI:10.1016/j.jallcom.2012.03.014  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:23  AU: Chen, Xinman;Zhang, Hu;Ruan, Kaibin;Shi, Wangzhou;
7:2:5:26     Persistence of Ferroelectricity in BaTiO3 through the Insulator-Metal Transition
DOI:10.1103/PhysRevLett.104.147602  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:23  AU: Kolodiazhnyi, T.;Tachibana, M.;Kawaji, H.;Hwang, J.;Takayama-Muromachi, E.;
7:2:5:27     Resistive switching artificially induced in a dielectric/ferroelectric composite diode
DOI:10.1063/1.4824214  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Tsurumaki-Fukuchi, Atsushi;Yamada, Hiroyuki;Sawa, Akihito;
7:2:5:28     Temperature-dependent and polarization-tuned resistive switching in Au/BiFeO3/SrRuO3 junctions
DOI:10.1063/1.4870813  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Lin, Y. B.;Yan, Z. B.;Lu, X. B.;Lu, Z. X.;Zeng, M.;Chen, Y.;Gao, X. S.;Wan, J. G.;Dai, J. Y.;Liu, J. -M.;
7:2:5:29     Forming-Free Resistive Switching in Multiferroic BiFeO3 thin Films with Enhanced Nanoscale Shunts
DOI:10.1021/am404144c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:4  AU: Ou, Xin;Shuai, Yao;Luo, Wenbo;Siles, Pablo F.;Koegler, Reinhard;Fiedler, Jan;Reuther, Helfried;Zhou, Shengqiang;Huebner, Rene;Facsko, Stefan;Helm, Manfred;Mikolajick, Thomas;Schmidt, Oliver G.;Schmidt, Heidemarie;
7:2:5:30     Hole conduction and nonlinear current-voltage behavior in multiferroic lanthanum-substituted bismuth ferrite
DOI:10.1016/j.jallcom.2014.07.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Dong, Guangzhi;Fan, Huiqing;Ren, Pengrong;Liu, Xiao;
7:2:5:31     Multiferroic and resistive switching behaviors in BiFe0.95Cr0.05O3 thin films deposited on Pt/Ti/SiO2/Si substrates
DOI:10.1007/s00339-013-7592-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:0  AU: Luo, B. C.;Wang, J.;Cao, X. S.;Jin, K. X.;Chen, C. L.;
7:2:5:32     Switchable diode effect in polycrystalline Bi3.15Nd0.85Ti3O12 thin films for resistive memories
DOI:10.1063/1.4855555  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Song, H. J.;Wang, J. B.;Zhong, X. L.;Cheng, J. J.;Jia, L. H.;Wang, F.;Li, B.;
7:2:5:33     Resistive switching characteristics in dielectric/ferroelectric composite devices improved by post-thermal annealing at relatively low temperature
DOI:10.1063/1.4867260  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Tsurumaki-Fukuchi, Atsushi;Yamada, Hiroyuki;Sawa, Akihito;
7:2:5:34     Confinement of Ferroelectric Domain-Wall Motion at Artificially Formed Conducting-Nanofilaments in Epitaxial BiFeO3 Thin Films
DOI:10.1021/am501630k  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:2  AU: Kim, Woo-Hee;Son, Jong Yeog;Jane, Hyun Myung;
7:2:5:35     Rectifying behavior and transport mechanisms of currents in Pt/BaTiO3/Nb:SrTiO3 structure
DOI:10.1016/j.jallcom.2011.12.146  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:9  AU: Pan, R. K.;Zhang, T. J.;Wang, J. Z.;Ma, Z. J.;Wang, J. Y.;Wang, D. F.;
7:2:5:36     Coexistence of unipolar and bipolar resistive switching in BiFeO3 and Bi0.8Ca0.2FeO3 films
DOI:10.1063/1.4716867  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:14  AU: Liu, Lu;Zhang, Shantao;Luo, Ying;Yuan, Guoliang;Liu, Junming;Yin, Jiang;Liu, Zhiguo;
7:2:5:37     Exploiting Memristive BiFeO3 Bilayer Structures for Compact Sequential Logics
DOI:10.1002/adfm.201303365  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:10  AU: You, Tiangui;Shuai, Yao;Luo, Wenbo;Du, Nan;Buerger, Danilo;Skorupa, Ilona;Huebner, Rene;Henker, Stephan;Mayr, Christian;Schueffny, Rene;Mikolajick, Thomas;Schmidt, Oliver G.;Schmidt, Heidemarie;
7:2:5:38     Direct observation of ferroelectric polarization-modulated band bending at oxide interfaces
DOI:10.1063/1.3691615  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:11  AU: Huang, B. C.;Chen, Y. T.;Chiu, Y. P.;Huang, Y. C.;Yang, J. C.;Chen, Y. C.;Chu, Y. H.;
7:2:5:39     Negative differential resistance and resistance switching behaviors in BaTiO3 thin films
DOI:10.1063/1.4878236  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Yang, G.;Jia, C. H.;Chen, Y. H.;Chen, X.;Zhang, W. F.;
7:2:5:40     Multilevel recording in Bi-deficient Pt/BFO/SRO heterostructures based on ferroelectric resistive switching targeting high-density information storage in nonvolatile memories
DOI:10.1063/1.4855155  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Jimenez, David;Miranda, Enrique;Tsurumaki-Fukuchi, Atsushi;Yamada, Hiroyuki;Sune, Jordi;Sawa, Akihito;
7:2:5:41     Modeling of hysteretic Schottky diode-like conduction in Pt/BiFeO3/SrRuO3 switches
DOI:10.1063/1.4894116  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Miranda, E.;Jimenez, D.;Tsurumaki-Fukuchi, A.;Blasco, J.;Yamada, H.;Sune, J.;Sawa, A.;
7:2:5:42     Resistive switching and threshold switching behaviors in La0.1Bi0.9Fe1-xCoxO3 ceramics
DOI:10.1063/1.4743013  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Wang, S. Y.;Liu, W. F.;Gao, J.;Qiu, Xue;Feng, Yu;Hou, X. G.;Yu, D. S.;Li, D. J.;
7:2:5:43     Influence of thickness on optical and structural properties of BiFeO3 thin films: PLD grown
DOI:10.1016/j.materresbull.2013.08.050  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:4  AU: Singh, Arun;Khan, Ziaul Raza;Vilarinho, P. M.;Gupta, Vinay;Katiyar, R. S.;
7:2:5:44     Low temperature dependent ferroelectric resistive switching in epitaxial BiFeO3 films
DOI:10.1063/1.4870503  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Yan, F.;Xing, G. Z.;Li, L.;
7:2:5:45     Magnetism and electrode dependant resistive switching in Ca-doped ceramic bismuth ferrite
DOI:10.1016/j.mseb.2012.02.022  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:8  AU: Rubi, D.;Marlasca, F. G.;Reinoso, M.;Bonville, P.;Levy, P.;
7:2:5:46     Large rectifying leakage current in Pt/BaTiO3/Nb:SrTiO3/Pt structure
DOI:10.1063/1.3658453  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Zhang, T. J.;Pan, R. K.;Ma, Z. J.;Duan, M. G.;Wang, D. F.;He, M.;
7:2:5:47     Phase-field modeling of switchable diode-like current-voltage characteristics in ferroelectric BaTiO3
DOI:10.1063/1.4875902  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Cao, Y.;Shen, J.;Randall, C. A.;Chen, L. Q.;
7:2:5:48     Diode and photocurrent effect in ferroelectric BaTiO3-delta
DOI:10.1063/1.3569619  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:16  AU: Won, C. J.;Park, Y. A.;Lee, K. D.;Ryu, H. Y.;Hur, N.;
7:2:5:49     Effect of ferroelectric parameters on ferroelectric diodes
DOI:10.1063/1.3692769  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Ge, Chen;Jin, Kui-juan;Wang, Can;Lu, Hui-bin;Wang, Cong;Yang, Guo-zhen;
7:2:5:50     Observation of three crystalline layers in hydrothermally grown BiFeO3 thick films
DOI:10.1063/1.4901835  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Lee, T. K.;Sung, K. D.;Kim, T. H.;Ko, J. -H.;Jung, J. H.;
7:2:5:51     Novel implementation of memristive systems for data encryption and obfuscation
DOI:10.1063/1.4869262  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Du, Nan;Manjunath, Niveditha;Shuai, Yao;Buerger, Danilo;Skorupa, Ilona;Schueffny, Rene;Mayr, Christian;Basov, Dimitri N.;Di Ventra, Massimiliano;Schmidt, Oliver G.;Schmidt, Heidemarie;
7:2:5:52     Bipolar resistance switching and photocurrent in a BaTiO3-delta thin film
DOI:10.1063/1.4819800  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Park, Y. A.;Sung, K. D.;Won, C. J.;Jung, J. H.;Hur, N.;
7:2:5:53     Chemical solution deposition derived (001)-oriented epitaxial BiFeO3 thin films with robust ferroelectric properties using stoichiometric precursors (invited)
DOI:10.1063/1.4891311  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhang, Qi;Valanoor, Nagarajan;Standard, Owen;
7:2:5:54     Potential barrier increase due to Gd doping of BiFeO3 layers in Nb:SrTiO3-BiFeO3-Pt structures displaying diode-like behavior
DOI:10.1063/1.4729816  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Khassaf, H.;Ibanescu, G. A.;Pintilie, I.;Misirlioglu, I. B.;Pintilie, L.;
7:2:5:55     Local resistive switching of Nd doped BiFeO3 thin films
DOI:10.1063/1.3701270  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Shen, Wan;Bell, Andrew;Karimi, Sarah;Reaney, Ian M.;
7:2:5:56     Improvement in resistive switching of Ba-doped BiFeO3 films
DOI:10.1063/1.4813551  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Vagadia, Megha;Ravalia, Ashish;Solanki, P. S.;Choudhary, R. J.;Phase, D. M.;Kuberkar, D. G.;
7:2:5:57     Ferroelectric Instability Under Screened Coulomb Interactions
DOI:10.1103/PhysRevLett.109.247601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: Wang, Yong;Liu, Xiaohui;Burton, J. D.;Jaswal, Sitaram S.;Tsymbal, Evgeny Y.;
7:2:5:58     Defect-Mediated Lattice Relaxation and Domain Stability in Ferroelectric Oxides
DOI:10.1103/PhysRevLett.109.117601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:9  AU: Kimmel, Anna V.;Weaver, Paul M.;Cain, Markys G.;Sushko, Peter V.;
7:2:5:59     Resistive switching and Schottky diode-like behaviors in Pt/BiFeO3/ITO devices
DOI:10.1016/j.jallcom.2014.02.180  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Luo, J. M.;Chen, S. H.;Bu, S. L.;Wen, J. P.;
7:2:5:60     Resistive switching in doped BiFeO3 films
DOI:10.1063/1.4865217  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Wu, Lei;Jiang, Changjun;Xue, Desheng;
7:2:5:61     Doping and temperature-dependent optical properties of oxygen-reduced BaTiO3-delta
DOI:10.1103/PhysRevB.82.214109  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Hwang, J.;Kolodiazhnyi, T.;Yang, J.;Couillard, M.;
7:2:5:62     Resistive Switching Hysteresis in Thin Films of Bismuth Ferrite
DOI:10.1080/00150193.2013.790759  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Razumnaya, A.;Gagou, Y.;Bouyanfif, H.;Carcan, B.;Allouche, B.;Wolfman, J.;Autret-Lambert, C.;El Marssi, M.;Mezzane, D.;Luk'yanchuk, I.;
7:2:5:63     Substrate effect on the resistive switching in BiFeO3 thin films
DOI:10.1063/1.3672840  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Shuai, Yao;Ou, Xin;Wu, Chuangui;Zhang, Wanli;Zhou, Shengqiang;Buerger, Danilo;Reuther, Helfried;Slesazeck, Stefan;Mikolajick, Thomas;Helm, Manfred;Schmidt, Heidemarie;
7:2:5:64     Unidirectional bulk conduction and the anomalous temperature dependence of drift current under a trap-density gradient
DOI:10.1103/PhysRevB.81.195210  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Watanabe, Yukio;
7:2:5:65     Resistive switching properties of Ce and Mn co-doped BiFeO3 thin films for nonvolatile memory application
DOI:10.1063/1.4860950  JN:AIP ADVANCES  PY:2013
  TC:2  AU: Tang, Zhenhua;Zeng, Jia;Xiong, Ying;Tang, Minghua;Xu, Dinglin;Cheng, Chuanpin;Xiao, Yongguang;Zhou, Yichun;
7:2:5:66     Self-assembled nanoscale capacitor cells based on ultrathin BiFeO3 films
DOI:10.1063/1.4875617  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Miao, Qing;Zeng, Min;Zhang, Zhang;Lu, Xubing;Dai, Jiyan;Gao, Xingsen;Liu, Jun-Ming;
7:2:5:67     Interfacial Nb-substitution induced anomalous enhancement of polarization and conductivity in BaTiO3 ferroelectric tunnel junctions
DOI:10.1063/1.4905059  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Li, H. F.;Zheng, Yue;Chen, W. J.;Wang, Biao;Zhang, G. H.;
7:2:5:68     Role of defects in BiFeO3 multiferroic films and their local electronic structure by x-ray absorption spectroscopy
DOI:10.1063/1.4898196  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ravalia, Ashish;Vagadia, Megha;Solanki, P. S.;Gautam, S.;Chae, K. H.;Asokan, K.;Shah, N. A.;Kuberkar, D. G.;
7:2:5:69     Prominent electric properties of BiFeO3 shells sputtered on ZnO-nanorod cores with LaNiO3 buffer layers
DOI:10.1088/0957-4484/24/22/225602  JN:NANOTECHNOLOGY  PY:2013
  TC:2  AU: Chiu, Kuan-Chang;Yang, Tung-Han;Wu, Jenn-Ming;
7:2:5:70     Ferroelectricity-induced resistive switching in Pb(Zr0.52Ti0.48)O-3/Pr0.7Ca0.3MnO3/Nb-doped SrTiO3 epitaxial heterostructure
DOI:10.1063/1.3694016  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Sadaf, Sharif Md;Bourim, El Mostafa;Liu, Xinjun;Choudhury, Sakeb Hasan;Kim, Dong-Wook;Hwang, Hyunsang;
7:2:5:71     Temperature-dependent resistive switching behavior in the structure of Au/Nb:SrTiO3/Ti
DOI:10.1007/s00339-012-7541-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Shen, J. X.;Qian, H. Q.;Wang, G. F.;An, Y. H.;Li, P. G.;Zhang, Y.;Wang, S. L.;Chen, B. Y.;Tang, W. H.;
7:2:5:72     Resistive switching behavior of (Zn1-xMgx)O films prepared by sol-gel processes
DOI:10.1016/j.tsf.2011.04.013  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Cheng, Hsin-Chuan;Chen, Shih-Wei;Wu, Jenn-Ming;
7:2:5:73     Unidirectional bulk conduction under trap density gradient for description of resistance switching
DOI:10.1016/j.ceramint.2011.05.037  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Watanabe, Yukio;
7:2:6:1     Universal Behavior and Electric-Field-Induced Structural Transition in Rare-Earth-Substituted BiFeO3
DOI:10.1002/adfm.200902017  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:115  AU: Kan, Daisuke;Palova, Lucia;Anbusathaiah, Varatharajan;Cheng, Ching Jung;Fujino, Shigehiro;Nagarajan, Valanoor;Rabe, Karin M.;Takeuchi, Ichiro;
7:2:6:2     Structural Evolution of the BiFeO3-LaFeO3 System
DOI:10.1021/cm1030975  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:63  AU: Rusakov, Dmitriy A.;Abakumov, Artem M.;Yamaura, Kazunari;Belik, Alexei A.;Van Tendeloo, Gustaaf;Takayama-Muromachi, Eiji;
7:2:6:3     Isothermal structural transitions, magnetization and large piezoelectric response in Bi1-xLaxFeO3 perovskites
DOI:10.1103/PhysRevB.83.054109  JN:PHYSICAL REVIEW B  PY:2011
  TC:42  AU: Troyanchuk, I. O.;Karpinsky, D. V.;Bushinsky, M. V.;Khomchenko, V. A.;Kakazei, G. N.;Araujo, J. P.;Tovar, M.;Sikolenko, V.;Efimov, V.;Kholkin, A. L.;
7:2:6:4     Reorientation of magnetic dipoles at the antiferroelectric-paraelectric phase transition of Bi1-xNdxFeO3 (0.15 <= x <= 0.25)
DOI:10.1103/PhysRevB.81.020103  JN:PHYSICAL REVIEW B  PY:2010
  TC:53  AU: Levin, Igor;Karimi, Sarah;Provenzano, Virgil;Dennis, Cindi L.;Wu, Hui;Comyn, Tim P.;Stevenson, Tim J.;Smith, Ronald I.;Reaney, Ian M.;
7:2:6:5     Phase Transitions, Magnetic and Piezoelectric Properties of Rare-Earth-Substituted BiFeO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04780.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:31  AU: Troyanchuk, Igor O.;Karpinsky, Dmitry V.;Bushinsky, Maxim V.;Mantytskaya, Olga S.;Tereshko, Nina V.;Shut, Victor N.;
7:2:6:6     Novel Nanoscale Twinned Phases in Perovskite Oxides
DOI:10.1002/adfm.201201467  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:30  AU: Prosandeev, Sergey;Wang, Dawei;Ren, Wei;Iniguez, Jorge;Bellaiche, Laurent;
7:2:6:7     Structure and Magnetic Properties of BiFe0.75Mn0.25O3 Perovskite Prepared at Ambient and High Pressure
DOI:10.1021/cm201774y  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:34  AU: Belik, Alexei A.;Abakumov, Artem M.;Tsirlin, Alexander A.;Hadermann, Joke;Kim, Jungeun;Van Tendeloo, Gustaaf;Takayama-Muromachi, Eiji;
7:2:6:8     Ti-Doping to Reduce Conductivity in Bi0.85Nd0.15FeO3 Ceramics
DOI:10.1002/adfm.201100191  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:31  AU: Kalantari, Kambiz;Sterianou, Iasmi;Karimi, Sarah;Ferrarelli, Matthew C.;Miao, Shu;Sinclair, Derek C.;Reaney, Ian M.;
7:2:6:9     Displacive Phase Transitions and Magnetic Structures in Nd-Substituted BiFeO3
DOI:10.1021/cm1036925  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:37  AU: Levin, I.;Tucker, M. C.;Wu, H.;Provenzano, V.;Dennis, C. L.;Karimi, S.;Comyn, T.;Stevenson, T.;Smith, R. I.;Reaney, I. M.;
7:2:6:10     Structural and magnetic properties of isovalently substituted multiferroic BiFeO3: Insights from Raman spectroscopy
DOI:10.1103/PhysRevB.86.184422  JN:PHYSICAL REVIEW B  PY:2012
  TC:15  AU: Bielecki, Johan;Svedlindh, Peter;Tibebu, Dessie T.;Cai, Shengzhen;Eriksson, Sten-G.;Borjesson, Lars;Knee, Christopher S.;
7:2:6:11     The beta-to-gamma Transition in BiFeO3: A Powder Neutron Diffraction Study
DOI:10.1002/adfm.201000118  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:41  AU: Arnold, Donna C.;Knight, Kevin S.;Catalan, Gustau;Redfern, Simon A. T.;Scott, James F.;Lightfoot, Philip;Morrison, Finlay D.;
7:2:6:12     Rhombohedral-to-orthorhombic transition and multiferroic properties of Dy-substituted BiFeO3
DOI:10.1063/1.3486500  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:40  AU: Khomchenko, V. A.;Karpinsky, D. V.;Kholkin, A. L.;Sobolev, N. A.;Kakazei, G. N.;Araujo, J. P.;Troyanchuk, I. O.;Costa, B. F. O.;Paixao, J. A.;
7:2:6:13     Strain driven structural phase transformations in dysprosium doped BiFeO3 ceramics
DOI:10.1039/c3tc32345e  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:8  AU: Lennox, Robert C.;Price, Mark C.;Jamieson, William;Jura, Marek;Daoud-Aladine, Aziz;Murray, Claire A.;Tang, Chiu;Arnold, Donna C.;
7:2:6:14     Mn substitution-driven structural and magnetic phase evolution in Bi1-xSmxFeO3 multiferroics
DOI:10.1063/1.3676205  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:17  AU: Khomchenko, V. A.;Troyanchuk, I. O.;Kovetskaya, M. I.;Paixao, J. A.;
7:2:6:15     Weak ferromagnetism and nanodimensional ferroelectric domain structure stabilized in the polar phase of Bi1-xNdxFeO3 multiferroics via Ti doping
DOI:10.1063/1.4873121  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Khomchenko, V. A.;Pereira, L. C. J.;Paixao, J. A.;
7:2:6:16     Strong smearing and disappearance of phase transitions into polar phases due to inhomogeneous lattice strains induced by A-site doping in Bi(1-x)A(x)FeO(3) (A: La, Sm, Gd)
DOI:10.1016/j.jallcom.2014.03.103  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Khodabakhsh, M.;Sen, C.;Khassaf, H.;Gulgun, M. A.;Misirlioglu, I. B.;
7:2:6:17     Mn substitution-modified polar phase in the Bi1-xNdxFeO3 multiferroics
DOI:10.1063/1.4810764  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Khomchenko, V. A.;Karpinsky, D. V.;Pereira, L. C. J.;Kholkin, A. L.;Paixao, J. A.;
7:2:6:18     Structural and magnetic phase transitions in Bi1-xNdxFe1-xMnxO3 multiferroics
DOI:10.1063/1.4862433  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Khomchenko, V. A.;Pereira, L. C. J.;Paixao, J. A.;
7:2:6:19     Local stabilisation of polar order at charged antiphase boundaries in antiferroelectric (Bi0.85Nd0.15)(Ti0.1Fe0.9)O-3
DOI:10.1063/1.4818002  JN:APL MATERIALS  PY:2013
  TC:6  AU: MacLaren, Ian;Wang, LiQiu;Morris, Owen;Craven, Alan J.;Stamps, Robert L.;Schaffer, Bernhard;Ramasse, Quentin M.;Miao, Shu;Kalantari, Kambiz;Sterianou, Iasmi;Reaney, Ian M.;
7:2:6:20     Structural and magnetic phase transitions in Bi1-xPrxFeO3 perovskites
DOI:10.1007/s10853-011-6040-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:32  AU: Khomchenko, V. A.;Troyanchuk, I. O.;Karpinsky, D. V.;Paixao, J. A.;
7:2:6:21     Structural phase evolution in Bi(7/8)Ln(1/8)FeO(3) (Ln = La-Dy) series
DOI:10.1016/j.matlet.2011.04.009  JN:MATERIALS LETTERS  PY:2011
  TC:18  AU: Khomchenko, V. A.;Troyanchuk, I. O.;Bushinsky, M. V.;Mantytskaya, O. S.;Sikolenko, V.;Paixao, J. A.;
7:2:6:22     Variations of ferroelectric off-centering distortion and 3d-4p orbital mixing in La-doped BiFeO3 multiferroics
DOI:10.1103/PhysRevB.82.045113  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Lee, Jung-Hoon;Choi, Hyoung Joon;Lee, Dongeun;Kim, Min G.;Bark, Chung W.;Ryu, Sangwoo;Oak, Min-Ae;Jang, Hyun Myung;
7:2:6:23     Antipolar phase in multiferroic BiFeO3 at high pressure
DOI:10.1103/PhysRevB.84.094108  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Kozlenko, D. P.;Belik, A. A.;Belushkin, A. V.;Lukin, E. V.;Marshall, W. G.;Savenko, B. N.;Takayama-Muromachi, E.;
7:2:6:24     Phase diagram of BiFeO3/LaFeO3 superlattices studied by x-ray diffraction experiments and first-principles calculations
DOI:10.1103/PhysRevB.90.104106  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Rispens, Gijsbert;Ziegler, Benedikt;Paruch, Patrycja;Zanolli, Zeila;Iniguez, Jorge;Ghosez, Philippe;
7:2:6:25     Phase coexistence near a morphotropic phase boundary in Sm-doped BiFeO3 films
DOI:10.1063/1.3481065  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:28  AU: Emery, S. B.;Cheng, C. -J.;Kan, D.;Rueckert, F. J.;Alpay, S. P.;Nagarajan, V.;Takeuchi, I.;Wells, B. O.;
7:2:6:26     Evolution of crystal structure and ferroic properties of La-doped BiFeO3 ceramics near the rhombohedral-orthorhombic phase boundary
DOI:10.1016/j.jallcom.2012.12.055  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:10  AU: Karpinsky, D. V.;Troyanchuk, I. O.;Tovar, M.;Sikolenko, V.;Efimov, V.;Kholkin, A. L.;
7:2:6:27     Nanoscale Structural and Chemical Properties of Antipolar Clusters in Sm-Doped BiFeO3 Ferroelectric Epitaxial Thin Films
DOI:10.1021/cm903618y  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:28  AU: Cheng, Ching-Jung;Borisevich, Albina Y.;Kan, Daisuke;Takeuchi, Ichiro;Nagarajan, Valanoor;
7:2:6:28     Structural transitions and unusual magnetic behavior in Mn-doped Bi1-xLaxFeO3 perovskites
DOI:10.1063/1.4759435  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Khomchenko, V. A.;Troyanchuk, I. O.;Karpinsky, D. V.;Das, S.;Amaral, V. S.;Tovar, M.;Sikolenko, V.;Paixao, J. A.;
7:2:6:29     Phase transformations in multiferroic Bi1-xLaxFe1-yTiyO3 ceramics probed by temperature dependent Raman scattering
DOI:10.1063/1.4900439  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Xu, L. P.;Zhang, L. L.;Zhang, X. L.;Zhang, J. Z.;Hu, Z. G.;Yu, J.;Chu, J. H.;
7:2:6:30     Microstructure-electromechanical property correlations in rare-earth-substituted BiFeO3 epitaxial thin films at morphotropic phase boundaries
DOI:10.1063/1.3520642  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:26  AU: Cheng, Ching-Jung;Kan, Daisuke;Anbusathaiah, Varatharajan;Takeuchi, Ichiro;Nagarajan, Valanoor;
7:2:6:31     Change in the magnetic structure of (Bi,Sm) FeO3 thin films at the morphotropic phase boundary probed by neutron diffraction
DOI:10.1063/1.4901294  JN:APL MATERIALS  PY:2014
  TC:0  AU: Maruyama, Shingo;Anbusathaiah, Varatharajan;Fennell, Amy;Enderle, Mechthild;Takeuchi, Ichiro;Ratcliff, William D.;
7:2:6:32     Magnetically Driven Dielectric and Structural Behavior in Bi0.5La0.5FeO3
DOI:10.1021/cm302513q  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:6  AU: Kavanagh, Christopher M.;Goff, Richard J.;Daoud-Aladine, Aziz;Lightfoot, Philip;Morrison, Finlay D.;
7:2:6:33     Effect of Sm substitution on ferroelectric and magnetic properties of BiFeO3
DOI:10.1016/j.scriptamat.2009.11.005  JN:SCRIPTA MATERIALIA  PY:2010
  TC:37  AU: Khomchenko, V. A.;Paixao, J. A.;Shvartsman, V. V.;Borisov, P.;Kleemann, W.;Karpinsky, D. V.;Kholkin, A. L.;
7:2:6:34     Novel Nanorod Precipitate Formation in Neodymium and Titanium Codoped Bismuth Ferrite
DOI:10.1002/adfm.201201835  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:8  AU: MacLaren, Ian;Wang, Li Qiu;Schaffer, Bernhard;Ramasse, Quentin M.;Craven, Alan J.;Selbach, Sverre M.;Spaldin, Nicola A.;Miao, Shu;Kalantari, Kambiz;Reaney, Ian M.;
7:2:6:35     Large Piezoelectric Coefficient in Tb-Doped BiFeO3 Films
DOI:10.1111/j.1551-2916.2009.03511.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:22  AU: Chen, Xuemei;Hu, Guangda;Wu, Weibing;Yang, Changhong;Wang, Xi;Fan, Suhua;
7:2:6:36     Temperature and Composition-Induced Structural Transitions in Bi1-xLa (Pr)(x)FeO3 Ceramics
DOI:10.1111/jace.12978  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Karpinsky, Dmitry V.;Troyanchuk, Igor O.;Tovar, Michael;Sikolenko, Vadim;Efimov, Vadim;Efimova, Ekaterina;Shur, Vladimir Ya;Kholkin, Andrei L.;
7:2:6:37     Spontaneous magnetization in the polar phase of Bi1-xCaxFeO3-2/x perovskites: The role of anion vacancies
DOI:10.1063/1.4903315  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Khomchenko, V. A.;Paixao, J. A.;
7:2:6:38     Combinatorial search of structural transitions: Systematic investigation of morphotropic phase boundaries in chemically substituted BiFeO3
DOI:10.1557/jmr.2012.314  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:11  AU: Kan, Daisuke;Long, Christian J.;Steinmetz, Christian;Lofland, Samuel E.;Takeuchi, Ichiro;
7:2:6:39     Phase coexistence in Bi1-xPrxFeO3 ceramics
DOI:10.1007/s10853-014-8398-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:2  AU: Karpinsky, D. V.;Troyanchuk, I. O.;Sikolenko, V.;Efimov, V.;Efimova, E.;Willinger, M.;Salak, A. N.;Kholkin, A. L.;
7:2:6:40     Complex antipolar root 2 x 4 x 2 root 2 structure with Pnma symmetry in BiFeO3 and BiFe1/2Sc1/2O3: First-principles calculations
DOI:10.1103/PhysRevB.90.054110  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Prosandeev, Sergey A.;Khalyavin, Dmitry D.;Raevski, Igor P.;Salak, Andrei N.;Olekhnovich, Nikolai M.;Pushkarev, Anatoly V.;Radyush, Yury V.;
7:2:6:41     Ca-Doping of BiFeO3: The Role of Strain in Determining Coupling between Ferroelectric Displacements, Magnetic Moments, Octahedral Tilting, and Oxygen-Vacancy Ordering
DOI:10.1021/cm402962q  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:13  AU: Schiemer, Jason A.;Withers, Ray L.;Liu, Yun;Carpenter, Michael A.;
7:2:6:42     Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3
DOI:10.1103/PhysRevB.89.174414  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Khalyavin, D. D.;Salak, A. N.;Olekhnovich, N. M.;Pushkarev, A. V.;Radyush, Yu. V.;Manuel, P.;Raevski, I. P.;Zheludkevich, M. L.;Ferreira, M. G. S.;
7:2:6:43     Chemical Substitution-Induced Ferroelectric Polarization Rotation in BiFeO3
DOI:10.1002/adma.201004503  JN:ADVANCED MATERIALS  PY:2011
  TC:18  AU: Kan, Daisuke;Anbusathaiah, Varatharajan;Takeuchi, Ichiro;
7:2:6:44     Composition and temperature-induced structural evolution in La, Sm, and Dy substituted BiFeO3 epitaxial thin films at morphotropic phase boundaries
DOI:10.1063/1.3605492  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Kan, Daisuke;Cheng, Ching-Jung;Nagarajan, Valanoor;Takeuchi, Ichiro;
7:2:6:45     Effect of Dy-substitution on the structural, vibrational, and multiferroic properties of BiFeO3 nanoparticles
DOI:10.1063/1.4881529  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:8  AU: Muneeswaran, M.;Giridharan, N. V.;
7:2:6:46     Atomic-Scale Imaging and Quantification of Electrical Polarisation in Incommensurate Antiferroelectric Lanthanum-Doped Lead Zirconate Titanate
DOI:10.1002/adfm.201101220  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:8  AU: MacLaren, Ian;Villaurrutia, Rafael;Schaffer, Bernhard;Houben, Lothar;Pelaiz-Barranco, Aime;
7:2:6:47     Ferroelectric Sm-Doped BiMnO3 Thin Films with Ferromagnetic Transition Temperature Enhanced to 140 K
DOI:10.1021/am501351c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:0  AU: Choi, Eun-Mi;Kursumovic, Ahmed;Lee, Oon Jew;Kleibeuker, Josee E.;Chen, Aiping;Zhang, Wenrui;Wang, Haiyan;MacManus-Driscoll, Judith L.;
7:2:6:48     High Pressure Crystal and Magnetic Phase Transitions in Multiferroic Bi0.9La0.1FeO3
DOI:10.1021/cm403558j  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:0  AU: Knee, Christopher S.;Tucker, Matthew G.;Manuel, Pascal;Cai, Shengzhen;Bielecki, Johan;Borjesson, Lars;Eriksson, Sten G.;
7:2:6:49     Displacive Phase Transitions and Intermediate Structures in Perovskites
DOI:10.1111/j.1551-2916.2010.04377.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:13  AU: Reaney, Ian M.;Woodward, David I.;Randall, Clive A.;
7:2:6:50     Electromechanical and magnetic properties of BiFeO3-LaFeO3-CaTiO3 ceramics near the rhombohedral-orthorhombic phase boundary
DOI:10.1063/1.4801960  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Karpinsky, D. V.;Troyanchuk, I. O.;Sikolenko, V.;Efimov, V.;Kholkin, A. L.;
7:2:6:51     Effect of dysprosium substitution on crystal structure and physical properties of multiferroic BiFeO3 ceramics
DOI:10.1016/j.jeurceramsoc.2013.10.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:9  AU: Koval, V.;Skorvanek, I.;Reece, M.;Mitoseriu, L.;Yan, H.;
7:2:6:52     Change in periodicity of the incommensurate magnetic order towards commensurate order in bismuth ferrite lead titanate
DOI:10.1016/j.jmmm.2010.07.043  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:18  AU: Stevenson, Tim;Comyn, Tim P.;Daoud-Aladine, Aziz;Bell, Andrew J.;
7:2:6:53     Terahertz and infrared studies of antiferroelectric phase transition in multiferroic Bi0.85Nd0.15FeO3
DOI:10.1063/1.3650241  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Goian, V.;Kamba, S.;Greicius, S.;Nuzhnyy, D.;Karimi, S.;Reaney, I. M.;
7:2:6:54     Structural phase transitions in Ti-doped Bi1-xNdxFeO3 ceramics
DOI:10.1063/1.3697666  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Kalantari, Kambiz;Sterianou, Iasmi;Sinclair, Derek C.;Bingham, Paul A.;Pokorny, Jan;Reaney, Ian M.;
7:2:6:55     Weak ferromagnetic polar phase in the BiFe1-xTixO3 multiferroics
DOI:10.1007/s10853-013-7186-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:5  AU: Khomchenko, V. A.;Troyanchuk, I. O.;Sikolenko, V.;Paixao, J. A.;
7:2:6:56     Antiferroelectric-ferroelectric phase boundary enhances polarization extension in rhombohedral Pb(Zr,Ti)O-3
DOI:10.1063/1.3666233  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Ghosh, Anirban;Damjanovic, Dragan;
7:2:6:57     Defect chemistry of Ti-doped antiferroelectric Bi0.85Nd0.15FeO3
DOI:10.1063/1.4705431  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Reaney, Ian M.;MacLaren, Ian;Wang, Liqiu;Schaffer, Bernhard;Craven, Alan;Kalantari, Kambiz;Sterianou, Iasmi;Miao, Shu;Karimi, Sarah;Sinclair, Derek C.;
7:2:6:58     Rhombohedral-orthorhombic morphotropic phase boundary in BiFeO3-based multiferroics: first-principles prediction
DOI:10.1039/c1jm13582a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:13  AU: Lee, Jung-Hoon;Oak, Min-Ae;Choi, Hyoung Joon;Son, Jong Yeog;Jang, Hyun Myung;
7:2:6:59     The atomic structure and chemistry of Fe-rich steps on antiphase boundaries in Ti-doped Bi0.9Nd0.15FeO3
DOI:10.1063/1.4884684  JN:APL MATERIALS  PY:2014
  TC:0  AU: MacLaren, Ian;Wang, LiQiu;Craven, Alan J.;Ramasse, Quentin M.;Schaffer, Bernhard;Kalantari, Kambiz;Reaney, Ian M.;
7:2:6:60     Mn doping-induced structural and magnetic transformations in the antiferroelectric phase of the Bi1-xNdxFeO3 perovskites
DOI:10.1063/1.4752277  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Khomchenko, V. A.;Troyanchuk, I. O.;Maria, T. M. R.;Karpinsky, D. V.;Das, S.;Amaral, V. S.;Paixao, J. A.;
7:2:6:61     Anomalous polarization in the antiferroelectric-ferroelectric phase coexistence state in PbZrO3-Bi(Mg1/2Ti1/2)O-3
DOI:10.1063/1.4847475  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Vadlamani, Bhaskar Sravan;Lalitha, K., V;Ranjan, Rajeev;
7:2:6:62     Large remnant polarization and magnetic field induced destruction of cycloidal spin structure in Bi1-xLaxFeO3 (0 <= x <= 0.2)
DOI:10.1063/1.4808353  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Yin, L. H.;Yang, J.;Zhao, B. C.;Liu, Y.;Tan, S. G.;Tang, X. W.;Dai, J. M.;Song, W. H.;Sun, Y. P.;
7:2:6:63     Low-Temperature Magnetic and Dielectric Anomalies in Rare-Earth-Substituted BiFeO3 Ceramics
DOI:10.1111/jace.13328  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Koval, Vladimir;Skorvanek, Ivan;Yan, Haixue;
7:2:6:64     Structure and multiferroic properties of Bi(1-x)DyxFe0.90Mg0.05Ti0.05O3 solid solution
DOI:10.1063/1.4790326  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Li, Nan;Wu, Jiangtao;Jiang, Yaqi;Xie, Zhaoxiong;Zheng, Lansun;Ye, Zuo-Guang;
7:2:6:65     Multiferroic properties of Bi1-xDyxFeO3 (x=0-0.2) ceramics at various temperatures
DOI:10.1016/j.matlet.2011.12.119  JN:MATERIALS LETTERS  PY:2012
  TC:9  AU: Sun, Chen;Wang, Yiping;Yang, Ying;Yuan, Guoliang;Yin, Jiang;Liu, Zhiguo;
7:2:6:66     Intermediate structural phases in rare-earth substituted BiFeO3
DOI:10.1016/j.materresbull.2009.12.018  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:16  AU: Khomchenko, V. A.;Paixao, J. A.;Kiselev, D. A.;Kholkin, A. L.;
7:2:6:67     Enhanced ferroelectric properties in Bi0.86Sm0.14FeO3-based ceramics
DOI:10.1063/1.4901901  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Shi, Xin Xin;Qin, Ying;Chen, Xiang Ming;
7:2:6:68     The oxygen octahedral distortion induced magnetic enhancement in multiferroic Bi1-xYbxFe0.95Co0.05O3 powders
DOI:10.1016/j.jallcom.2014.03.108  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Chen, Longsheng;He, Yonghou;Zhang, Jiang;Mao, Zhongquan;Zhao, Yu-Jun;Chen, Xi;
7:2:6:69     Enhanced piezoelectric and magnetic properties of Bi1-xCaxFe1-x/2Nbx/2O3 solid solutions
DOI:10.1063/1.3594251  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Troyanchuk, I. O.;Tereshko, N. V.;Karpinsky, D. V.;Kholkin, A. L.;Kopcewicz, M.;Baerner, K.;
7:2:6:70     Improved dielectric and magnetic properties of Ti modified BiCaFeO3 multiferroic ceramics
DOI:10.1063/1.4774283  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Reetu;Agarwal, Ashish;Sanghi, Sujata;Ashima;Ahlawat, Neetu;
7:2:6:71     Effect of Pr- and Nd- doping on structural, dielectric, and magnetic properties of multiferroic Bi0.8La0.2Fe0.9Mn0.1O3
DOI:10.1063/1.4870454  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Singh, Rahul;Dwivedi, G. D.;Shahi, P.;Kumar, D.;Prakash, Om;Ghosh, A. K.;Chatterjee, Sandip;
7:2:6:72     Synthesis and characterization of Bi-1 (-) xNdxFeO3 thin films deposited using a high throughput physical vapour deposition technique
DOI:10.1016/j.tsf.2012.12.012  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Darby, M. S. B.;Karpinsky, D. V.;Pokorny, J.;Guerin, S.;Kholkin, A. L.;Miao, S.;Hayden, B. E.;Reaney, I. M.;
7:2:6:73     Synthesis, structural and electrical properties of Bi1-xDyxFeO3 multiferroic ceramics
DOI:10.1016/j.ceramint.2012.12.041  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Barbar, S. K.;Jangid, S.;Roy, M.;Chou, F. C.;
7:2:6:74     Development of an Atomic Level Model for BiFeO3 from First-Principles
DOI:10.1080/00150193.2014.889905  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Graf, M.;Sepliarsky, M.;Stachiotti, M.;Tinte, S.;
7:2:6:75     Universal emergence of spatially modulated structures induced by flexoantiferrodistortive coupling in multiferroics
DOI:10.1103/PhysRevB.88.224105  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:2:6:76     High-temperature phases of multiferroic BiFe0.7Mn0.3O3
DOI:10.1103/PhysRevB.87.224109  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Gibbs, Alexandra S.;Arnold, Donna C.;Knight, Kevin S.;Lightfoot, Philip;
7:2:6:77     Photovoltaic phenomena in BiFeO3 multiferroic ceramics
DOI:10.1063/1.3675984  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Hung, C. -M.;Tu, C. -S.;Yen, W. D.;Jou, L. S.;Jiang, M. -D.;Schmidt, V. H.;
7:2:6:78     Phase diagram of BiFeO3/LaFeO3 superlattices studied by x-ray diffraction experiments and first-principles calculations (vol 90, 104106, 2014)
DOI:10.1103/PhysRevB.90.139905  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Rispens, Gijsbert;Ziegler, Benedikt;Zanolli, Zeila;Iniguez, Jorge;Ghosez, Philippe;Paruch, Patrycja;
7:2:6:79     Electron Transfer Between Ionized Vacancies in Lead Zirconate Titanate and its Effects on Piezoelectric Properties and Squeeze Behavior
DOI:10.1080/00150193.2011.532054  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Eyraud, Lucien;Lebrun, Laurent;Audigier, David;Guiffard, Benoit;Guyomar, Daniel;
7:2:6:80     Bismuth ferrite bilayered thin films of different constituent layer thicknesses
DOI:10.1016/j.jallcom.2011.04.140  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:1  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:7:1     Real Space Mapping of Li-Ion Transport in Amorphous Si Anodes with Nanometer Resolution
DOI:10.1021/nl101439x  JN:NANO LETTERS  PY:2010
  TC:97  AU: Balke, Nina;Jesse, Stephen;Kim, Yoongu;Adamczyk, Leslie;Tselev, Alexander;Ivanov, Ilia N.;Dudney, Nancy J.;Kalinin, Sergei V.;
7:2:7:2     Probing Surface and Bulk Electrochemical Processes on the LaAlO3-SrTiO3 Interface
DOI:10.1021/nn204960c  JN:ACS NANO  PY:2012
  TC:29  AU: Kumar, Amit;Arruda, Thomas M.;Kim, Yunseok;Ivanov, Ilia N.;Jesse, Stephen;Bark, Chung W.;Bristowe, Nicholas C.;Artacho, Emilio;Littlewood, Peter B.;Eom, Chang-Beom;Kalinin, Sergei V.;
7:2:7:3     Nanoscale electromechanics of paraelectric materials with mobile charges: Size effects and nonlinearity of electromechanical response of SrTiO3 films
DOI:10.1103/PhysRevB.84.045402  JN:PHYSICAL REVIEW B  PY:2011
  TC:31  AU: Morozovska, A. N.;Eliseev, E. A.;Svechnikov, G. S.;Kalinin, S. V.;
7:2:7:4     Decoupling Electrochemical Reaction and Diffusion Processes in Ionically-Conductive Solids on the Nanometer Scale
DOI:10.1021/nn101502x  JN:ACS NANO  PY:2010
  TC:45  AU: Balke, Nina;Jesse, Stephen;Kim, Yoongu;Adamczyk, Leslie;Ivanov, Ilia N.;Dudney, Nancy J.;Kalinin, Sergei V.;
7:2:7:5     Thermodynamics of electromechanically coupled mixed ionic-electronic conductors: Deformation potential, Vegard strains, and flexoelectric effect
DOI:10.1103/PhysRevB.83.195313  JN:PHYSICAL REVIEW B  PY:2011
  TC:27  AU: Morozovska, A. N.;Eliseev, E. A.;Tagantsev, A. K.;Bravina, S. L.;Chen, Long-Qing;Kalinin, S. V.;
7:2:7:6     Polarization Dynamics in Ferroelectric Capacitors: Local Perspective on Emergent Collective Behavior and Memory Effects
DOI:10.1002/adfm.201203422  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:7  AU: Vasudevan, Rama K.;Marincel, Daniel;Jesse, Stephen;Kim, Yunseok;Kumar, Amit;Kalinin, Sergei V.;Trolier-McKinstry, Susan;
7:2:7:7     Ionically-Mediated Electromechanical Hysteresis in Transition Metal Oxides
DOI:10.1021/nn3020757  JN:ACS NANO  PY:2012
  TC:19  AU: Kim, Yunseok;Morozovska, Anna N.;Kumar, Amit;Jesse, Stephen;Eliseev, Eugene A.;Alibart, Fabien;Strukov, Dmitri;Kalinin, Sergei V.;
7:2:7:8     The Role of Electrochemical Phenomena in Scanning Probe Microscopy of Ferroelectric Thin Films
DOI:10.1021/nn2013518  JN:ACS NANO  PY:2011
  TC:38  AU: Kalinin, Sergei V.;Jesse, Stephen;Tselev, Alexander;Baddorf, Arthur P.;Balke, Nina;
7:2:7:9     Local probing of ionic diffusion by electrochemical strain microscopy: Spatial resolution and signal formation mechanisms
DOI:10.1063/1.3460637  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:46  AU: Morozovska, A. N.;Eliseev, E. A.;Balke, N.;Kalinin, S. V.;
7:2:7:10     Scanning Probe Microscopy in US Department of Energy Nanoscale Science Research Centers: Status, Perspectives, and Opportunities
DOI:10.1002/adfm.201300891  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:2  AU: Kalinin, Sergei V.;
7:2:7:11     Mapping Irreversible Electrochemical Processes on the Nanoscale: Ionic Phenomena in Li Ion Conductive Glass Ceramics
DOI:10.1021/nl202039v  JN:NANO LETTERS  PY:2011
  TC:31  AU: Arruda, Thomas M.;Kumar, Amit;Kalinin, Sergei V.;Jesse, Stephen;
7:2:7:12     Frequency dependent dynamical electromechanical response of mixed ionic-electronic conductors
DOI:10.1063/1.3673868  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Morozovska, A. N.;Eliseev, E. A.;Bravina, S. L.;Ciucci, Francesco;Svechnikov, G. S.;Chen, Long-Qing;Kalinin, S. V.;
7:2:7:13     Electromechanical probing of ionic currents in energy storage materials
DOI:10.1063/1.3446838  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:28  AU: Morozovska, A. N.;Eliseev, E. A.;Kalinin, S. V.;
7:2:7:14     Dynamic piezoresponse force microscopy: Spatially resolved probing of polarization dynamics in time and voltage domains
DOI:10.1063/1.4746080  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Kumar, A.;Ehara, Y.;Wada, A.;Funakubo, H.;Griggio, F.;Trolier-McKinstry, S.;Jesse, S.;Kalinin, S. V.;
7:2:7:15     Variable temperature electrochemical strain microscopy of Sm-doped ceria
DOI:10.1088/0957-4484/24/14/145401  JN:NANOTECHNOLOGY  PY:2013
  TC:7  AU: Kumar, Amit;Jesse, Stephen;Morozovska, Anna N.;Eliseev, Eugene;Tebano, Antonello;Yang, Nan;Kalinin, Sergei V.;
7:2:7:16     Defect thermodynamics and kinetics in thin strained ferroelectric films: The interplay of possible mechanisms
DOI:10.1103/PhysRevB.89.054102  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Morozovska, Anna N.;Eliseev, Eugene A.;Krishnan, P. S. Sankara Rama;Tselev, Alexander;Strelkov, Evgheny;Borisevich, Albina;Varenyk, Olexander V.;Morozovsky, Nicola V.;Munroe, Paul;Kalinin, Sergei V.;Nagarajan, Valanoor;
7:2:7:17     Nanoscale Probing of Voltage Activated Oxygen Reduction/Evolution Reactions in Nanopatterned (LaxSr1-x)CoO3-Cathodes
DOI:10.1002/aenm.201200681  JN:ADVANCED ENERGY MATERIALS  PY:2013
  TC:4  AU: Leonard, Donovan N.;Kumar, Amit;Jesse, Stephen;Biegalski, Michael D.;Christen, Hans M.;Mutoro, Eva;Crumlin, Ethan J.;Shao-Horn, Yang;Kalinin, Sergei V.;Borisevich, Albina Y.;
7:2:7:18     Probing Local Ionic Dynamics in Functional Oxides at the Nanoscale
DOI:10.1021/nl400780d  JN:NANO LETTERS  PY:2013
  TC:11  AU: Strelcov, Evgheni;Kim, Yunseok;Jesse, Stephen;Cao, Ye;Ivanov, Ilia N.;Kravchenko, Ivan I.;Wang, Chih-Hung;Teng, Yung-Chun;Chen, Long-Qing;Chu, Ying Hao;Kalinin, Sergei V.;
7:2:7:19     Direct Mapping of Ionic Transport in a Si Anode on the Nanoscale: Time Domain Electrochemical Strain Spectroscopy Study
DOI:10.1021/nn203141g  JN:ACS NANO  PY:2011
  TC:23  AU: Jesse, Stephen;Balke, Nina;Eliseev, Eugene;Tselev, Alexander;Dudney, Nancy J.;Morozovska, Anna N.;Kalinin, Sergei V.;
7:2:7:20     Electrochemical strain microscopy: Probing ionic and electrochemical phenomena in solids at the nanometer level
DOI:10.1557/mrs.2012.144  JN:MRS BULLETIN  PY:2012
  TC:17  AU: Jesse, Stephen;Kumar, Amit;Arruda, Thomas M.;Kim, Yunseok;Kalinin, Sergei V.;Ciucci, Francesco;
7:2:7:21     Nonlinear Phenomena in Multiferroic Nanocapacitors: Joule Heating and Electromechanical Effects
DOI:10.1021/nn203342v  JN:ACS NANO  PY:2011
  TC:20  AU: Kim, Yunseok;Kumar, Amit;Tselev, Alexander;Kravchenko, Ivan I.;Han, Hee;Vrejoiu, Ionela;Lee, Woo;Hesse, Dietrich;Alexe, Marin;Kalinin, Sergei V.;Jesset, Stephen;
7:2:7:22     Nanoscale Mapping of Lithium-Ion Diffusion in a Cathode within an All-Solid-State Lithium-Ion Battery by Advanced Scanning Probe Microscopy Techniques
DOI:10.1021/nn305648j  JN:ACS NANO  PY:2013
  TC:10  AU: Zhu, Jing;Lu, Li;Zeng, Kaiyang;
7:2:7:23     Probing Bias-Dependent Electrochemical Gas-Solid Reactions in (LaxSr1-x)CoO3-delta Cathode Materials
DOI:10.1002/adfm.201202401  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:6  AU: Kumar, Amit;Ciucci, Francesco;Leonard, Donovan;Jesse, Stephen;Biegalski, Mike;Christen, Hans;Mutoro, Eva;Crumlin, Ethan;Shao-Horn, Yang;Borisevich, Albina;Kalinin, Sergei V.;
7:2:7:24     Resolution theory, and static and frequency-dependent cross-talk in piezoresponse force microscopy
DOI:10.1088/0957-4484/21/40/405703  JN:NANOTECHNOLOGY  PY:2010
  TC:23  AU: Jesse, S.;Guo, S.;Kumar, A.;Rodriguez, B. J.;Proksch, R.;Kalinin, S. V.;
7:2:7:25     Local Electrochemical Functionality in Energy Storage Materials and Devices by Scanning Probe Microscopies: Status and Perspectives
DOI:10.1002/adma.201001190  JN:ADVANCED MATERIALS  PY:2010
  TC:33  AU: Kalinin, Sergei V.;Balke, Nino;
7:2:7:26     Nonlinear space charge dynamics in mixed ionic-electronic conductors: Resistive switching and ferroelectric-like hysteresis of electromechanical response
DOI:10.1063/1.4891346  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Morozovska, Anna N.;Eliseev, Eugene A.;Varenyk, Olexandr V.;Kim, Yunseok;Strelcov, Evgheni;Tselev, Alexander;Morozovsky, Nicholas V.;Kalinin, Sergei V.;
7:2:7:27     Open-loop band excitation Kelvin probe force microscopy
DOI:10.1088/0957-4484/23/12/125704  JN:NANOTECHNOLOGY  PY:2012
  TC:7  AU: Guo, Senli;Kalinin, Sergei V.;Jesse, Stephen;
7:2:7:28     Effect of Doping on Surface Reactivity and Conduction Mechanism in Samarium-Doped Ceria Thin Films
DOI:10.1021/nn505345c  JN:ACS NANO  PY:2014
  TC:4  AU: Yang, Nan;Belianinov, Alex;Strelcov, Evgheni;Tebano, Antonello;Foglietti, Vittorio;Di Castro, Daniele;Schlueter, Christoph;Lee, Tien-Lin;Baddorf, Arthur P.;Balke, Nina;Jesse, Stephen;Kalinin, Sergei V.;Balestrino, Giuseppe;Aruta, Carmela;
7:2:7:29     Delineating local electromigration for nanoscale probing of lithium ion intercalation and extraction by electrochemical strain microscopy
DOI:10.1063/1.4742933  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Chen, Qian Nately;Liu, Yanyi;Liu, Yuanming;Xie, Shuhong;Cao, Guozhong;Li, Jiangyu;
7:2:7:30     Second harmonic detection in the electrochemical strain microscopy of Ag-ion conducting glass
DOI:10.1063/1.4901736  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Yang, Sang Mo;Okatan, M. Baris;Paranthaman, M. Parans;Jesse, Stephen;Noh, Tae Won;Kalinin, Sergei V.;
7:2:7:31     Spatially resolved probing of Preisach density in polycrystalline ferroelectric thin films
DOI:10.1063/1.3493738  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:18  AU: Guo, S.;Ovchinnikov, O. S.;Curtis, M. E.;Johnson, M. B.;Jesse, S.;Kalinin, S. V.;
7:2:7:32     Humidity Effect on Nanoscale Electrochemistry in Solid Silver Ion Conductors and the Dual Nature of Its Locality
DOI:10.1021/nl5040286  JN:NANO LETTERS  PY:2015
  TC:0  AU: Yang, Sang Mo;Strelcov, Evgheni;Paranthaman, M. Parans;Tselev, Alexander;Noh, Tae Won;Kalinin, Sergei V.;
7:2:7:33     Real-space mapping of dynamic phenomena during hysteresis loop measurements: Dynamic switching spectroscopy piezoresponse force microscopy
DOI:10.1063/1.3590919  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Kumar, A.;Ovchinnikov, O. S.;Funakubo, H.;Jesse, S.;Kalinin, S. V.;
7:2:7:34     Electrostrictive and electrostatic responses in contact mode voltage modulated scanning probe microscopies
DOI:10.1063/1.4882861  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Eliseev, Eugene A.;Morozovska, Anna N.;Ievlev, Anton V.;Balke, Nina;Maksymovych, Peter;Tselev, Alexander;Kalinin, Sergei V.;
7:2:7:35     Electrochemical strain microscopy with blocking electrodes: The role of electromigration and diffusion
DOI:10.1063/1.3675508  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Morozovska, A. N.;Eliseev, E. A.;Kalinin, S. V.;
7:2:7:36     Oxygen nonstoichiometry, defect structure and defect-induced expansion of undoped perovskite LaMnO3 (+/-) (delta)
DOI:10.1016/j.ssi.2010.02.024  JN:SOLID STATE IONICS  PY:2010
  TC:23  AU: Zuev, A. Yu.;Tsvetkov, D. S.;
7:2:7:37     High-Frequency Electromechanical Imaging of Ferroelectrics in a Liquid Environment
DOI:10.1021/nn301489g  JN:ACS NANO  PY:2012
  TC:4  AU: Balke, Nina;Jesse, Stephen;Chu, Ying-Hao;Kalinin, Sergei V.;
7:2:7:38     Defective Interfaces in Yttrium-Doped Barium Zirconate Films and Consequences on Proton Conduction
DOI:10.1021/acs.nanolett.5b00698  JN:NANO LETTERS  PY:2015
  TC:0  AU: Yang, Nan;Cantoni, Claudia;Foglietti, Vittorio;Tebano, Antonello;Belianinov, Alex;Strelcov, Evgheni;Jesse, Stephen;Di Castro, Daniele;Di Bartolomeo, Elisabetta;Licoccia, Silvia;Kalinin, Sergei V.;Balestrino, Giuseppe;Aruta, Carmela;
7:2:7:39     Self-consistent modeling of electrochemical strain microscopy of solid electrolytes
DOI:10.1088/0957-4484/25/44/445701  JN:NANOTECHNOLOGY  PY:2014
  TC:3  AU: Tselev, Alexander;Morozovska, Anna N.;Udod, Alexei;Eliseev, Eugene A.;Kalinin, Sergei V.;
7:2:7:40     Nanopatterning of carbonaceous structures by field-induced carbon dioxide splitting with a force microscope
DOI:10.1063/1.3374885  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:21  AU: Garcia, R.;Losilla, N. S.;Martinez, J.;Martinez, R. V.;Palomares, F. J.;Huttel, Y.;Calvaresi, M.;Zerbetto, F.;
7:2:7:41     Mechanisms of electromechanical coupling in strain based scanning probe microscopy
DOI:10.1063/1.4884422  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Chen, Qian Nataly;Ou, Yun;Ma, Feiyue;Li, Jiangyu;
7:2:7:42     Three-dimensional vector electrochemical strain microscopy
DOI:10.1063/1.4746085  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Balke, N.;Eliseev, E. A.;Jesse, S.;Kalnaus, S.;Daniel, C.;Dudney, N. J.;Morozovska, A. N.;Kalinin, S. V.;
7:2:7:43     Nanoscale impedance and complex properties in energy-related systems
DOI:10.1557/mrs.2012.145  JN:MRS BULLETIN  PY:2012
  TC:2  AU: Lee, Wonyoung;Prinz, Fritz B.;Chen, Xi;Nonnenmann, S.;Bonnell, Dawn A.;O'Hayre, Ryan P.;
7:2:7:44     Local Detection of Activation Energy for Ionic Transport in Lithium Cobalt Oxide
DOI:10.1021/nl300219g  JN:NANO LETTERS  PY:2012
  TC:7  AU: Balke, Nina;Kalnaus, Sergiy;Dudney, Nancy J.;Daniel, Claus;Jesse, Stephen;Kalinin, Sergei V.;
7:2:7:45     Switching spectroscopic measurement of surface potentials on ferroelectric surfaces via an open-loop Kelvin probe force microscopy method
DOI:10.1063/1.4772511  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Li, Qian;Liu, Yun;Wang, Danyang;Withers, Ray L.;Li, Zhenrong;Luo, Haosu;Xu, Zhuo;
7:2:7:46     Voltage induced local hysteretic phase switching in silicon
DOI:10.1063/1.4873386  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Sekhon, Jagmeet S.;Aggarwal, Leena;Sheet, Goutam;
7:2:7:47     Water-mediated electrochemical nano-writing on thin ceria films
DOI:10.1088/0957-4484/25/7/075701  JN:NANOTECHNOLOGY  PY:2014
  TC:2  AU: Yang, Nan;Doria, Sandra;Kumar, Amit;Jang, Jae Hyuck;Arruda, Thomas M.;Tebano, Antonello;Jesse, Stephen;Ivanov, Ilia N.;Baddorf, Arthur P.;Strelcov, Evgheni;Licoccia, Silvia;Borisevich, Albina Y.;Balestrino, Giuseppe;Kalinin, Sergei V.;
7:2:7:48     Spatially resolved mapping of disorder type and distribution in random systems using artificial neural network recognition
DOI:10.1103/PhysRevB.84.024203  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Kumar, A.;Ovchinnikov, O.;Guo, S.;Griggio, F.;Jesse, S.;Trolier-McKinstry, S.;Kalinin, S. V.;
7:2:7:49     Probing Local Electromechanical Effects in Highly Conductive Electrolytes
DOI:10.1021/nn3038868  JN:ACS NANO  PY:2012
  TC:1  AU: Balke, Nina;Tselev, Alexander;Arruda, Thomas M.;Jesse, Stephen;Chu, Ying-Hao;Kalinin, Sergei V.;
7:2:7:50     Nanoscale In Situ Characterization of Li-ion Battery Electrochemistry Via Scanning Ion Conductance Microscopy
DOI:10.1002/adma.201103094  JN:ADVANCED MATERIALS  PY:2011
  TC:13  AU: Lipson, Albert L.;Ginder, Ryan S.;Hersam, Mark C.;
7:2:7:51     Local measurements of Preisach density in polycrystalline ferroelectric capacitors using piezoresponse force spectroscopy
DOI:10.1063/1.3360220  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Ovchinnikov, O.;Jesse, S.;Guo, S.;Seal, K.;Bintachitt, P.;Fujii, I.;Trolier-McKinstry, S.;Kalinin, S. V.;
7:2:7:52     Anomalous dielectric peak in Mg and Li doped ZnO ceramics and thin films
DOI:10.1063/1.3505930  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Soukiassian, A.;Tagantsev, A.;Setter, N.;
7:2:7:53     Indentation of a punch with chemical or heat distribution at its base into transversely isotropic half-space: Application to local thermal and electrochemical probes
DOI:10.1063/1.4802097  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Karapetian, Edgar;Kalinin, Sergei V.;
7:2:7:54     The partially reversible formation of Li-metal particles on a solid Li electrolyte: applications toward nanobatteries
DOI:10.1088/0957-4484/23/32/325402  JN:NANOTECHNOLOGY  PY:2012
  TC:7  AU: Arruda, Thomas M.;Kumar, Amit;Kalinin, Sergei V.;Jesse, Stephen;
7:2:7:55     Nanoscale Electrodes by Conducting Atomic Force Microscopy: Oxygen Reduction Kinetics at the Pt vertical bar CsHSO4 Interface
DOI:10.1021/nn100084h  JN:ACS NANO  PY:2010
  TC:15  AU: Louie, Mary W.;Hightower, Adrian;Haile, Sossina M.;
7:2:7:56     Spatially Resolved Mapping of Oxygen Reduction/Evolution Reaction on Solid-Oxide Fuel Cell Cathodes with Sub-10 nm Resolution
DOI:10.1021/nn303239e  JN:ACS NANO  PY:2013
  TC:6  AU: Kumar, Amit;Leonard, Donovan;Jesse, Stephen;Ciucci, Francesco;Eliseev, Eugene A.;Morozovska, Anna N.;Biegalski, Michael D.;Christen, Hans M.;Tselev, Alexander;Mutoro, Eva;Crumlin, Ethan J.;Morgan, Dane;Shao-Horn, Yang;Borisevich, Albina;Kalinin, Sergei V.;
7:2:7:57     Room-temperature ferroelectricity in SrTiO3 nanodots array formed by an ac-bias field
DOI:10.1063/1.4820407  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Son, Jong Yeog;Lee, Jung-Hoon;Jang, Hyun Myung;
7:2:7:58     Nanoscale mapping of oxygen vacancy kinetics in nanocrystalline Samarium doped ceria thin films
DOI:10.1063/1.4826685  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Doria, Sandra;Yang, Nan;Kumar, Amit;Jesse, Stephen;Tebano, Antonello;Aruta, Carmela;Di Bartolomeo, Elisabetta;Arruda, Thomas M.;Kalinin, Sergei V.;Licoccia, Silvia;Balestrino, Giuseppe;
7:2:7:59     Imaging space charge regions in Sm-doped ceria using electrochemical strain microscopy
DOI:10.1063/1.4901102  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chen, Qian Nataly;Adler, Stuart B.;Li, Jiangyu;
7:2:7:60     Quantitative nanoscopic impedance measurements on silver-ion conducting glasses using atomic force microscopy combined with impedance spectroscopy
DOI:10.1016/j.ssi.2011.07.008  JN:SOLID STATE IONICS  PY:2011
  TC:9  AU: Kruempelmann, J.;Balabajew, M.;Gellert, M.;Roling, B.;
7:2:7:61     Ferromagnetism induced by magnetic vacancies as a size effect in thin films of nonmagnetic oxides
DOI:10.1016/j.tsf.2013.02.135  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Glinchuk, Maya D.;Eliseev, Eugene A.;Khist, Victoria V.;Morozovska, Anna N.;
7:2:7:62     Toward Quantitative Electrochemical Measurements on the Nanoscale by Scanning Probe Microscopy: Environmental and Current Spreading Effects
DOI:10.1021/nn4034772  JN:ACS NANO  PY:2013
  TC:2  AU: Arruda, Thomas M.;Kumar, Amit;Jesse, Stephen;Veith, Gabriel M.;Tselev, Alexander;Baddorf, Arthur P.;Balke, Nina;Kalinin, Sergei V.;
7:2:7:63     Heavily strained BaZr0.8Y0.2O3-x interfaces with enhanced transport properties
DOI:10.1063/1.4867020  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Foglietti, Vittorio;Yang, Nan;Tebano, Antonello;Aruta, Carmela;Di Bartolomeo, Elisabetta;Licoccia, Silvia;Cantoni, Claudia;Balestrino, Giuseppe;
7:2:7:64     Point force and generalized point source on the surface of semi-infinite transversely isotropic material
DOI:10.1063/1.3624799  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Karapetian, Edgar;Kalinin, Sergei V.;
7:2:7:65     AFM tip-induced metal particle formation on laser-structured and on unstructured surfaces of solid-state ion conductors
DOI:10.1016/j.ssi.2013.01.003  JN:SOLID STATE IONICS  PY:2013
  TC:4  AU: Kruempelmann, Julia;Reinhardt, Hendrik;Yada, Chihiro;Rosciano, Fabio;Hampp, Norbert;Roling, Bernhard;
7:2:7:66     Site-Dependent Activity of Atomic Ti Catalysts in Al-Based Hydrogen Storage Materials
DOI:10.1021/ja304203y  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:3  AU: Al-Mahboob, Abdullah;Muller, Erik;Karim, Altaf;Muckerman, James T.;Ciobanu, Cristian V.;Sutter, Peter;
7:2:7:67     In situ atomic force microscopy analysis of morphology and particle size changes in Lithium Iron Phosphate cathode during discharge
DOI:10.1016/j.jcis.2014.02.035  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2014
  TC:2  AU: Demirocak, Dervis Emre;Bhushan, Bharat;
7:2:7:68     Indentation of a flat circular punch with uniform heat flux at its base into transversely isotropic magneto-electro-thermo-elastic half space
DOI:10.1063/1.4866684  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Yang, Jing;Jin, Xianyu;
7:2:7:69     Variable temperature electrochemical strain microscopy of Sm-doped ceria (vol 24, 145401, 2013)
DOI:10.1088/0957-4484/25/8/089501  JN:NANOTECHNOLOGY  PY:2014
  TC:0  AU: Kumar, A.;Jesse, S.;Morozovska, A.;Eliseev, E.;Tebano, A.;Yang, N.;Kalinin, S. V.;
7:2:7:70     High resolution electrical characterisation of Ag-conducting heterogeneous chalcogenide glasses
DOI:10.1016/j.ssi.2010.06.050  JN:SOLID STATE IONICS  PY:2010
  TC:6  AU: Piarristeguy, A. A.;Ramonda, M.;Frolet, N.;Ribes, M.;Pradel, A.;
7:2:8:1     Room-Temperature Ferroelectric Resistive Switching in Ultrathin Pb(Zr0.2Ti0.8)O-3 Films
DOI:10.1021/nn2018528  JN:ACS NANO  PY:2011
  TC:55  AU: Pantel, Daniel;Goetze, Silvana;Hesse, Dietrich;Alexe, Marin;
7:2:8:2     Crossing an Interface: Ferroelectric Control of Tunnel Currents in Magnetic Complex Oxide Heterostructures
DOI:10.1002/adfm.201000265  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:61  AU: Hambe, Michael;Petraru, Adrian;Pertsev, Nikolay A.;Munroe, Paul;Nagarajan, Valanoor;Kohlstedt, Hermann;
7:2:8:3     Ferroelectric and multiferroic tunnel junctions
DOI:10.1557/mrs.2011.358  JN:MRS BULLETIN  PY:2012
  TC:45  AU: Tsymbal, E. Y.;Gruverman, A.;Garcia, V.;Bibes, M.;Barthelemy, A.;
7:2:8:4     Effect of a built-in electric field in asymmetric ferroelectric tunnel junctions
DOI:10.1103/PhysRevB.88.024106  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Liu, Yang;Lou, Xiaojie;Bibes, Manuel;Dkhil, Brahim;
7:2:8:5     Giant Electroresistance of Super-tetragonal BiFeO3-Based Ferroelectric Tunnel Junctions
DOI:10.1021/nn401378t  JN:ACS NANO  PY:2013
  TC:42  AU: Yamada, Hiroyuki;Garcia, Vincent;Fusil, Stephane;Boyn, Soeren;Marinova, Maya;Gloter, Alexandre;Xavier, Stephane;Grollier, Julie;Jacquet, Eric;Carretero, Cecile;Deranlot, Cyrile;Bibes, Manuel;Barthelemy, Agnes;
7:2:8:6     Giant Tunneling Electroresistance Effect Driven by an Electrically Controlled Spin Valve at a Complex Oxide Interface
DOI:10.1103/PhysRevLett.106.157203  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:40  AU: Burton, J. D.;Tsymbal, E. Y.;
7:2:8:7     Giant tunnel electroresistance with PbTiO3 ferroelectric tunnel barriers
DOI:10.1063/1.3295700  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:34  AU: Crassous, A.;Garcia, V.;Bouzehouane, K.;Fusil, S.;Vlooswijk, A. H. G.;Rispens, G.;Noheda, B.;Bibes, M.;Barthelemy, A.;
7:2:8:8     Ferroelectric Tunnel Memristor
DOI:10.1021/nl302912t  JN:NANO LETTERS  PY:2012
  TC:43  AU: Kim, D. J.;Lu, H.;Ryu, S.;Bark, C-W.;Eom, C-B.;Tsymbal, E. Y.;Gruverman, A.;
7:2:8:9     Band alignment at metal/ferroelectric interfaces: Insights and artifacts from first principles
DOI:10.1103/PhysRevB.83.235112  JN:PHYSICAL REVIEW B  PY:2011
  TC:27  AU: Stengel, Massimiliano;Aguado-Puente, Pablo;Spaldin, Nicola A.;Junquera, Javier;
7:2:8:10     Enhancement of Ferroelectric Polarization Stability by Interface Engineering
DOI:10.1002/adma.201104398  JN:ADVANCED MATERIALS  PY:2012
  TC:35  AU: Lu, H.;Liu, X.;Burton, J. D.;Bark, C. -W.;Wang, Y.;Zhang, Y.;Kim, D. J.;Stamm, A.;Lukashev, P.;Felker, D. A.;Folkman, C. M.;Gao, P.;Rzchowski, M. S.;Pan, X. Q.;Eom, C. -B.;Tsymbal, E. Y.;Gruverman, A.;
7:2:8:11     Interface dipole effect on thin film ferroelectric stability: First-principles and phenomenological modeling
DOI:10.1103/PhysRevB.85.125407  JN:PHYSICAL REVIEW B  PY:2012
  TC:12  AU: Liu, Xiaohui;Wang, Yong;Lukashev, Pavel V.;Burton, J. D.;Tsymbal, Evgeny Y.;
7:2:8:12     Critical properties of symmetric nano scale metal-ferroelectric-metal capacitors
DOI:10.1016/j.actamat.2010.01.039  JN:ACTA MATERIALIA  PY:2010
  TC:22  AU: Zheng, Yue;Cai, M. Q.;Woo, C. H.;
7:2:8:13     Finite size and intrinsic field effect on the polar-active properties of ferroelectric-semiconductor heterostructures
DOI:10.1103/PhysRevB.81.205308  JN:PHYSICAL REVIEW B  PY:2010
  TC:22  AU: Morozovska, A. N.;Eliseev, E. A.;Svechnikov, S. V.;Krutov, A. D.;Shur, V. Y.;Borisevich, A. Y.;Maksymovych, P.;Kalinin, S. V.;
7:2:8:14     Effect of spin-dependent screening on tunneling electroresistance and tunneling magnetoresistance in multiferroic tunnel junctions
DOI:10.1103/PhysRevB.81.104419  JN:PHYSICAL REVIEW B  PY:2010
  TC:27  AU: Zhuravlev, M. Ye;Maekawa, S.;Tsymbal, E. Y.;
7:2:8:15     Tunnel electroresistance in junctions with ultrathin ferroelectric Pb(Zr0.2Ti0.8)O-3 barriers
DOI:10.1063/1.4726120  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:20  AU: Pantel, Daniel;Lu, Haidong;Goetze, Silvana;Werner, Peter;Kim, Dong Jik;Gruverman, Alexei;Hesse, Dietrich;Alexe, Marin;
7:2:8:16     Tunneling Electroresistance Induced by Interfacial Phase Transitions in Ultrathin Oxide Heterostructures
DOI:10.1021/nl4025598  JN:NANO LETTERS  PY:2013
  TC:19  AU: Jiang, Lu;Choi, Woo Seok;Jeen, Hyoungjeen;Dong, Shuai;Kim, Yunseok;Han, Myung-Geun;Zhu, Yimei;Kalinin, Sergei V.;Dagotto, Elbio;Egami, Takeshi;Lee, Ho Nyung;
7:2:8:17     Tunable Tunneling Electroresistance in Ferroelectric Tunnel Junctions by Mechanical Loads
DOI:10.1021/nn1031438  JN:ACS NANO  PY:2011
  TC:25  AU: Luo, Xin;Wang, Biao;Zheng, Yue;
7:2:8:18     Ab initio study on the size effect of symmetric and asymmetric ferroelectric tunnel junctions: A comprehensive picture with regard to the details of electrode/ferroelectric interfaces
DOI:10.1063/1.4817656  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Chen, W. J.;Zheng, Yue;Luo, X.;Wang, B.;Woo, C. H.;
7:2:8:19     Systematic study of ferroelectric, interfacial, oxidative, and doping effects on conductance of Pt/BaTiO3/Pt ferroelectic tunnel junctions
DOI:10.1103/PhysRevB.85.064105  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Shen, Lei;Zhou, Tiejun;Bai, Zhaoqiang;Zeng, Minggang;Goh, Jing Qiang;Yuan, Zhi-Min;Han, Guchang;Liu, Bo;Feng, Yuan Ping;
7:2:8:20     Electroresistance Effect in Ferroelectric Tunnel Junctions with Symmetric Electrodes
DOI:10.1021/nn2043324  JN:ACS NANO  PY:2012
  TC:12  AU: Bilc, Daniel I.;Novaes, Frederico D.;Iniguez, Jorge;Ordejon, Pablo;Ghosez, Philippe;
7:2:8:21     Nanoscale ferroelectric tunnel junctions based on ultrathin BaTiO3 film and Ag nanoelectrodes
DOI:10.1063/1.4756918  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Gao, X. S.;Liu, J. M.;Au, K.;Dai, J. Y.;
7:2:8:22     Coexistence of tunneling magnetoresistance and electroresistance at room temperature in La0.7Sr0.3MnO3/(Ba, Sr)TiO3/La0.7Sr0.3MnO3 multiferroic tunnel junctions
DOI:10.1063/1.3564970  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:19  AU: Yin, Y. W.;Raju, M.;Hu, W. J.;Weng, X. J.;Li, X. G.;Li, Q.;
7:2:8:23     A ferroelectric tunnel junction based on the piezoelectric effect for non-volatile nanoferroelectric devices
DOI:10.1039/c2tc00097k  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:7  AU: Yuan, Shuoguo;Wang, Jinbin;Zhong, Xiangli;Wang, Fang;Li, Bo;Zhou, Yichun;
7:2:8:24     Interface control of ferroelectricity in LaNiO3-BaTiO3 superlattices
DOI:10.1063/1.4892610  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Wu, Yin-Zhong;Lu, Hai-Shuang;Cai, Tian-Yi;Ju, Sheng;
7:2:8:25     Tunneling electroresistance in multiferroic heterostructures
DOI:10.1088/0957-4484/25/49/495203  JN:NANOTECHNOLOGY  PY:2014
  TC:3  AU: Barrionuevo, D.;Zhang, Le;Ortega, N.;Sokolov, A.;Kumar, A.;Misra, Pankaj;Scott, J. F.;Katiyar, R. S.;
7:2:8:26     Ferroelectric dead layer driven by a polar interface
DOI:10.1103/PhysRevB.82.094114  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Wang, Y.;Niranjan, M. K.;Janicka, K.;Velev, J. P.;Zhuravlev, M. Ye.;Jaswal, S. S.;Tsymbal, E. Y.;
7:2:8:27     Effects of ferroelectric dead layer on the electron transport in ferroelectric tunneling junctions
DOI:10.1063/1.3619841  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Sun, Ping;Wu, Yin-Zhong;Cai, Tian-Yi;Ju, Sheng;
7:2:8:28     High-performance ferroelectric memory based on fully patterned tunnel junctions
DOI:10.1063/1.4864100  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Boyn, S.;Girod, S.;Garcia, V.;Fusil, S.;Xavier, S.;Deranlot, C.;Yamada, H.;Carretero, C.;Jacquet, E.;Bibes, M.;Barthelemy, A.;Grollier, J.;
7:2:8:29     Vanishing critical thickness in asymmetric ferroelectric tunnel junctions: First principle simulations
DOI:10.1063/1.3532000  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Cai, Meng-Qiu;Zheng, Yue;Ma, Pui-Wai;Woo, C. H.;
7:2:8:30     Mechanically-Induced Resistive Switching in Ferroelectric Tunnel Junctions
DOI:10.1021/nl303396n  JN:NANO LETTERS  PY:2012
  TC:14  AU: Lu, H.;Kim, D. J.;Bark, C. -W.;Ryu, S.;Eom, C. B.;Tsymbal, E. Y.;Gruverman, A.;
7:2:8:31     Electroresistance effects in ferroelectric tunnel barriers
DOI:10.1103/PhysRevB.82.134105  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Pantel, D.;Alexe, M.;
7:2:8:32     Density functional study of PbTiO3 nanocapacitors with Pt and Au electrodes
DOI:10.1103/PhysRevB.82.155304  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Al-Saidi, W. A.;Rappe, Andrew M.;
7:2:8:33     Dissimilar-electrodes-induced asymmetric characteristic and diode effect of current transport in zinc oxide tunnel junctions
DOI:10.1063/1.4816796  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Zhang, Genghong;Zheng, Yue;Wang, Biao;
7:2:8:34     Critical properties of nanoscale asymmetric ferroelectric tunnel junctions or capacitors
DOI:10.1016/j.actamat.2011.12.048  JN:ACTA MATERIALIA  PY:2012
  TC:9  AU: Zheng, Yue;Chen, W. J.;Luo, X.;Wang, B.;Woo, C. H.;
7:2:8:35     Interface and Surface Cation Stoichiometry Modified by Oxygen Vacancies in Epitaxial Manganite Films
DOI:10.1002/adfm.201200143  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:12  AU: Li, Zhipeng;Bosman, Michel;Yang, Zhen;Ren, Peng;Wang, Lan;Cao, Liang;Yu, Xiaojiang;Ke, Chang;Breese, Mark B. H.;Rusydi, Andrivo;Zhu, Weiguang;Dong, Zhili;Foo, Yong Lim;
7:2:8:36     Pinned interface dipole-induced tunneling electroresistance in ferroelectric tunnel junctions: A theoretical investigation
DOI:10.1063/1.4749267  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Wu, Yin-Zhong;
7:2:8:37     Thickness dependent functional properties of PbZr0.52Ti0.48O3/La0.67Sr0.33MnO3 heterostructures
DOI:10.1063/1.4848017  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Barrionuevo, D.;Ortega, N.;Kumar, A.;Chatterjee, R.;Scott, J. F.;Katiyar, R. S.;
7:2:8:38     Continuously-tuned tunneling behaviors of ferroelectric tunnel junctions based on BaTiO3/La0.67Sr0.33MnO3 heterostructure
DOI:10.1063/1.4876234  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Ou, Xin;Xu, Bo;Gong, Changjie;Lan, Xuexin;Yin, Qiaonan;Xia, Yidong;Yin, Jiang;Liu, Zhiguo;
7:2:8:39     An Epitaxial Ferroelectric Tunnel Junction on Silicon
DOI:10.1002/adma.201402527  JN:ADVANCED MATERIALS  PY:2014
  TC:7  AU: Li, Zhipeng;Guo, Xiao;Lu, Hui-Bin;Zhang, Zaoli;Song, Dongsheng;Cheng, Shaobo;Bosman, Michel;Zhu, Jing;Dong, Zhili;Zhu, Weiguang;
7:2:8:40     Coexistence of four resistance states and exchange bias in La0.6Sr0.4MnO3/BiFeO3/La0.6Sr0.4MnO3 multiferroic tunnel junction
DOI:10.1063/1.4863741  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Liu, Y. K.;Yin, Y. W.;Dong, S. N.;Yang, S. W.;Jiang, T.;Li, X. G.;
7:2:8:41     Current-voltage characteristics and ON/OFF ratio in ferroelectric tunnel junctions
DOI:10.1063/1.4748051  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Lu, Xiaoyan;Li, Hui;Cao, Wenwu;
7:2:8:42     Interface-modification-enhanced tunnel electroresistance in multiferroic tunnel junctions
DOI:10.1063/1.4892592  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Mao, H. J.;Miao, P. X.;Cong, J. Z.;Song, C.;Cui, B.;Peng, J. J.;Li, F.;Wang, G. Y.;Zhao, Y. G.;Sun, Y.;Xiao, L. R.;Pan, F.;
7:2:8:43     Electronic band alignment and electron transport in Cr/BaTiO3/Pt ferroelectric tunnel junctions
DOI:10.1063/1.4792525  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:11  AU: Zenkevich, A.;Minnekaev, M.;Matveyev, Yu.;Lebedinskii, Yu.;Bulakh, K.;Chouprik, A.;Baturin, A.;Maksimova, K.;Thiess, S.;Drube, W.;
7:2:8:44     Space charge effect in ultrathin ferroelectric films
DOI:10.1063/1.4704178  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Lu, Xiaoyan;Cao, Wenwu;Li, Hui;
7:2:8:45     Misfit strain-temperature phase diagrams and domain stability of asymmetric ferroelectric capacitors: Thermodynamic calculation and phase-field simulation
DOI:10.1063/1.4867480  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chen, W. J.;Zheng, Yue;Wang, B.;Ma, D. C.;Wu, C. M.;
7:2:8:46     Influence of the electronic structure on tunneling through ferroelectric insulators: Application to BaTiO3 and PbTiO3(3)
DOI:10.1103/PhysRevB.83.155114  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Wortmann, D.;Bluegel, S.;
7:2:8:47     Prediction of large bias-dependent magnetoresistance in all-oxide magnetic tunnel junctions with a ferroelectric barrier
DOI:10.1103/PhysRevB.83.125409  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Caffrey, Nuala M.;Archer, Thomas;Rungger, Ivan;Sanvito, Stefano;
7:2:8:48     Leakage current analysis of La0.67Sr0.33MnO3/Nb:SrTiO3 p-n junctions
DOI:10.1007/s00339-014-8348-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Pan, R. K.;Xia, Z. C.;He, Y. B.;Li, M. K.;Li, P.;Liu, P. K.;
7:2:8:49     Retention of resistance states in ferroelectric tunnel memristors
DOI:10.1063/1.4823989  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Kim, D. J.;Lu, H.;Ryu, S.;Lee, S.;Bark, C. W.;Eom, C. B.;Gruverman, A.;
7:2:8:50     Prediction of ferroelectric stability and magnetoelectric effect of asymmetric multiferroic tunnel junctions
DOI:10.1063/1.4801306  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Liu, X. T.;Zheng, Yue;Wang, B.;Chen, W. J.;
7:2:8:51     Nanoscale electroresistance properties of all-oxide magneto-electric tunnel junction with ultra-thin barium titanate barrier
DOI:10.1063/1.4791699  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Kim, G.;Mazumdar, D.;Gupta, A.;
7:2:8:52     Ferroelectric tunnel junctions with multi-quantum well structures
DOI:10.1063/1.4880896  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ma, Zhijun;Zhang, Tianjin;Liang, Kun;Qi, Yajun;Wang, Duofa;Wang, Jinzhao;Jiang, Juan;
7:2:8:53     Coexistance of Giant Tunneling Electroresistance and Magnetoresistance in an All-Oxide Composite Magnetic Tunnel Junction
DOI:10.1103/PhysRevLett.109.226803  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:5  AU: Caffrey, Nuala Mai;Archer, Thomas;Rungger, Ivan;Sanvito, Stefano;
7:2:8:54     Reversible electrical switching of spin polarization in multiferroic tunnel junctions
DOI:10.1038/NMAT3254  JN:NATURE MATERIALS  PY:2012
  TC:94  AU: Pantel, D.;Goetze, S.;Hesse, D.;Alexe, M.;
7:2:8:55     Ferroelectric-field-effect-enhanced electroresistance in metal/ferroelectric/semiconductor tunnel junctions
DOI:10.1038/NMAT3649  JN:NATURE MATERIALS  PY:2013
  TC:70  AU: Wen, Zheng;Li, Chen;Wu, Di;Li, Aidong;Ming, Naiben;
7:2:8:56     Strong influence of complex band structure on tunneling electroresistance: A combined model and ab initio study
DOI:10.1103/PhysRevB.82.214110  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Hinsche, N. F.;Fechner, M.;Bose, P.;Ostanin, S.;Henk, J.;Mertig, I.;Zahn, P.;
7:2:8:57     Contribution of space charges to the polarization of ferroelectric superlattices and its effect on dielectric properties
DOI:10.1103/PhysRevB.82.094115  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Okatan, M. B.;Misirlioglu, I. B.;Alpay, S. P.;
7:2:8:58     Stabilization of highly polarized PbTiO3 nanoscale capacitors due to in-plane symmetry breaking at the interface
DOI:10.1103/PhysRevB.85.214107  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Polanco, Miguel Angel Mendez;Grinberg, Ilya;Kolpak, Alexie M.;Levchenko, Sergey V.;Pynn, Christopher;Rappe, Andrew M.;
7:2:8:59     Room-Temperature Ferroelectricity in Hexagonal TbMnO3 Thin Films
DOI:10.1002/adma.201403301  JN:ADVANCED MATERIALS  PY:2014
  TC:3  AU: Kim, Dong Jik;Paudel, Tula R.;Lu, Haidong;Burton, John D.;Connell, John G.;Tsymbal, Evgeny Y.;Seo, S. S. Ambrose;Gruverman, Alexei;
7:2:8:60     Colossal resistance switching in Pt/BiFeO3/Nb:SrTiO3 memristor
DOI:10.1007/s00339-014-8314-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:2  AU: Wu, Shuxiang;Ren, Lizhu;Yu, Fengmei;Yang, Kungan;Yang, Mei;Wang, Yunjia;Meng, Meng;Zhou, Wenqi;Li, Shuwei;
7:2:8:61     Effects of electrodes and space charges on the tunneling electroresistance in the ferroelectric tunnel junction with a SrTiO3/BaTiO3 composite barrier
DOI:10.1063/1.3457451  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Wu, Yin-Zhong;Ju, Sheng;Li, Zhen-Ya;
7:2:8:62     Memristive behaviors in Pt/BaTiO3/Nb:SrTiO3 ferroelectric tunnel junctions
DOI:10.1063/1.4892846  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wen, Zheng;Wu, Di;Li, Aidong;
7:2:8:63     Polarization induced resistance switching effect in ferroelectric vinylidene-fluoride/trifluoroethylene copolymer ultrathin films
DOI:10.1063/1.4900490  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Usui, S.;Nakajima, T.;Hashizume, Y.;Okamura, S.;
7:2:8:64     Optimal dielectric thickness for ferroelectric tunnel junctions with a composite barrier
DOI:10.1063/1.3700245  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Ma, Z. J.;Zhang, J.;Pan, R. K.;Duan, M. G.;He, M.;
7:2:8:65     Converse-piezoelectric effect on current-voltage characteristics of symmetric ferroelectric tunnel junctions
DOI:10.1063/1.3673600  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Lu, Xiaoyan;Cao, Wenwu;Jiang, Wenhua;Li, Hui;
7:2:8:66     Interfacial dead layer effects on current-voltage characteristics in asymmetric ferroelectric tunnel junctions
DOI:10.1063/1.4803151  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Sun, Ping;Wu, Yin-Zhong;Zhu, Su-Hua;Cai, Tian-Yi;Ju, Sheng;
7:2:8:67     Enhanced tunnelling electroresistance effect due to a ferroelectrically induced phase transition at a magnetic complex oxide interface
DOI:10.1038/NMAT3564  JN:NATURE MATERIALS  PY:2013
  TC:64  AU: Yin, Y. W.;Burton, J. D.;Kim, Y-M.;Borisevich, A. Y.;Pennycook, S. J.;Yang, S. M.;Noh, T. W.;Gruverman, A.;Li, X. G.;Tsymbal, E. Y.;Li, Qi;
7:2:8:68     Ultrathin BaTiO3-Based Ferroelectric Tunnel Junctions through Interface Engineering
DOI:10.1021/acs.nanolett.5b00138  JN:NANO LETTERS  PY:2015
  TC:1  AU: Li, Changjian;Huang, Lisen;Li, Tao;Lu, Weiming;Qiu, Xuepeng;Huang, Zhen;Liu, Zhiqi;Zeng, Shengwei;Guo, Rui;Zhao, Yonglian;Zeng, Kaiyang;Coey, Michael;Chen, Jingsheng;Ariando;Venkatesan, T.;
7:2:8:69     Impact of applied strain on the electron transport through ferroelectric tunnel junctions
DOI:10.1063/1.3462070  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Luo, Xin;Lin, S. P.;Wang, Biao;Zheng, Yue;
7:2:8:70     Electrodes controlling phase diagrams of symmetric ferroelectric tunneling junctions or capacitors
DOI:10.1063/1.3591163  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Chen, W. J.;Zheng, Yue;Wang, Biao;
7:2:8:71     Mechanical switching of ferroelectric polarization in ultrathin BaTiO3 films: The effects of epitaxial strain
DOI:10.1063/1.4863855  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Wen, Zheng;Qiu, Xiangbiao;Li, Chen;Zheng, Chunyan;Ge, Xiaohui;Li, Aidong;Wu, Di;
7:2:8:72     First-principles calculations of size-dependent giant electroresistance effect in nanoscale asymmetric ferroelectric tunnel junctions
DOI:10.1063/1.3698503  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Luo, Xin;Zheng, Yue;Wang, Biao;
7:2:8:73     Theoretical study on piezoresponse of ultrathin ferroelectric films
DOI:10.1063/1.4757946  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Lu, Xiaoyan;Li, Hui;Cao, Wenwu;
7:2:8:74     Tunneling electroresistance effect in Pt/MgO/Pt/PbTiO3/Pt ferroelectric tunnel junctions
DOI:10.1063/1.4734513  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Ma, Zhijun;Zhang, Tianjin;Pan, Ruikun;Liang, Kun;Wang, Duofa;Wang, Jingang;Wang, Jinzhao;Jiang, Juan;Qi, Yajun;Chu, Huifang;
7:2:8:75     Temperature-dependent tunneling electroresistance in Pt/BaTiO3/SrRuO3 ferroelectric tunnel junctions
DOI:10.1063/1.4823580  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Wen, Zheng;You, Lu;Wang, Junling;Li, Aidong;Wu, Di;
7:2:8:76     Polarization relaxation kinetics in ultrathin ferroelectric capacitors
DOI:10.1063/1.4794865  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Stamm, A.;Kim, D. J.;Lu, H.;Bark, C. W.;Eom, C. B.;Gruverman, A.;
7:2:8:77     Spin-dependent resonant tunneling of multiferroic tunnel junction via head-to-head 180 degrees domain wall
DOI:10.1063/1.4826436  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Dai, Jian-Qing;Zhang, Hu;Song, Yu-Min;
7:2:8:78     FERROELECTRIC TUNNEL JUNCTIONS Beyond the barrier
DOI:10.1038/nmat3669  JN:NATURE MATERIALS  PY:2013
  TC:13  AU: Tsymbal, E. Y.;Gruverman, A.;
7:2:8:79     Interface effect on the magnitude and stability of ferroelectric polarization in ultrathin PbTiO3 films from first-principles study
DOI:10.1063/1.4816350  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Yang, Q.;Cao, J. X.;Ma, Y.;Zhou, Y. C.;Lou, X. J.;Yang, J.;
7:2:8:80     A ferroelectric memristor
DOI:10.1038/NMAT3415  JN:NATURE MATERIALS  PY:2012
  TC:113  AU: Chanthbouala, Andre;Garcia, Vincent;Cherifi, Ryan O.;Bouzehouane, Karim;Fusil, Stephane;Moya, Xavier;Xavier, Stephane;Yamada, Hiroyuki;Deranlot, Cyrile;Mathur, Neil D.;Bibes, Manuel;Barthelemy, Agnes;Grollier, Julie;
7:2:8:81     First-principles study of the critical thickness in asymmetric ferroelectric tunnel junctions
DOI:10.1063/1.3551728  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Cai, Meng-Qiu;Du, Yong;Huang, Bo-Yun;
7:2:8:82     La-doped BaTiO3 heterostructures: Compensating the polarization discontinuity
DOI:10.1063/1.4849735  JN:APL MATERIALS  PY:2013
  TC:0  AU: Kumah, D. P.;Yacoby, Y.;Pauli, S. A.;Willmott, P. R.;Clarke, R.;
7:2:8:83     Bias voltage effect on electron tunneling across a junction with a ferroelectric-ferromagnetic two-phase composite barrier
DOI:10.1016/j.jmmm.2011.10.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Wang, Jian;Ju, Sheng;Li, Z. Y.;
7:2:8:84     Unveiling the atomic and electronic structure of the VN/MgO interface
DOI:10.1103/PhysRevB.82.060103  JN:PHYSICAL REVIEW B  PY:2010
  TC:1  AU: Zhang, Zaoli;Rashkova, B.;Dehm, G.;Lazar, P.;Redinger, J.;Podloucky, R.;
7:2:8:85     Critical properties of symmetric nanoscale metal-ferroelectric-metal capacitors (vol 58, pg 3050, 2010)
DOI:10.1016/j.actamat.2010.06.048  JN:ACTA MATERIALIA  PY:2010
  TC:0  AU: Zheng, Yue;Cai, M. Q.;Woo, C. H.;
7:2:8:86     Modeling of the Nanodomain Formation in the Heterostructure "SPM Tip Electrode-Thin Ferroelectric Film-Semiconductor Substrate"
DOI:10.1080/00150193.2011.578545  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Morozovska, A. N.;
7:2:9:1     Spontaneous Vortex Nanodomain Arrays at Ferroelectric Heterointerfaces
DOI:10.1021/nl1041808  JN:NANO LETTERS  PY:2011
  TC:101  AU: Nelson, Christopher T.;Winchester, Benjamin;Zhang, Yi;Kim, Sung-Joo;Melville, Alexander;Adamo, Carolina;Folkman, Chad M.;Baek, Seung-Hyub;Eom, Chang-Beom;Schlom, Darrell G.;Chen, Long-Qing;Pan, Xiaoqing;
7:2:9:2     Flux Closure Vortexlike Domain Structures in Ferroelectric Thin Films
DOI:10.1103/PhysRevLett.104.207602  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:47  AU: Ivry, Y.;Chu, D. P.;Scott, J. F.;Durkan, C.;
7:2:9:3     Exploring Topological Defects in Epitaxial BiFeO3 Thin Films
DOI:10.1021/nn102099z  JN:ACS NANO  PY:2011
  TC:36  AU: Vasudevan, Rama K.;Chen, Yi-Chun;Tai, Hsiang-Hua;Balke, Nina;Wu, Pingping;Bhattacharya, Saswata;Chen, L. Q.;Chu, Ying-Hao;Lin, I-Nan;Kalinin, Sergei V.;Nagarajan, Valanoor;
7:2:9:4     High Speed SPM Applied for Direct Nanoscale Mapping of the Influence of Defects on Ferroelectric Switching Dynamics
DOI:10.1111/j.1551-2916.2012.05099.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:13  AU: Huey, Bryan D.;Premnath, Ramesh Nath;Lee, Sungjun;Polomoff, Nicholas A.;
7:2:9:5     Domain Bundle Boundaries in Single Crystal BaTiO3 Lamellae: Searching for Naturally Forming Dipole Flux-Closure/Quadrupole Chains
DOI:10.1021/nl102566y  JN:NANO LETTERS  PY:2010
  TC:39  AU: McGilly, L. J.;Schilling, A.;Gregg, J. M.;
7:2:9:6     Closed-circuit domain quadruplets in BaTiO3 nanorods embedded in a SrTiO3 film
DOI:10.1103/PhysRevB.89.060101  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Stepkova, V.;Marton, P.;Setter, N.;Hlinka, J.;
7:2:9:7     Manipulating Ferroelectric Domains in Nanostructures Under Electron Beams
DOI:10.1103/PhysRevLett.111.165702  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:7  AU: Ahluwalia, R.;Ng, N.;Schilling, A.;McQuaid, R. G. P.;Evans, D. M.;Gregg, J. M.;Srolovitz, D. J.;Scott, J. F.;
7:2:9:8     Polarization Closure in PbZr(0.42)Ti(0.58)O3 Nanodots
DOI:10.1021/nl2031103  JN:NANO LETTERS  PY:2011
  TC:24  AU: McGilly, L. J.;Gregg, J. M.;
7:2:9:9     Ferroelectric effects in individual BaTiO3 nanocrystals investigated by electron holography
DOI:10.1103/PhysRevB.85.134112  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Szwarcman, Daniel;Lubk, Axel;Linck, Martin;Vogel, Karin;Lereah, Yossi;Lichte, Hannes;Markovich, Gil;
7:2:9:10     Toroidal Ferroelectricity in PbTiO3 Nanoparticles
DOI:10.1103/PhysRevLett.106.137601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:20  AU: Stachiotti, M. G.;Sepliarsky, M.;
7:2:9:11     Self-Similar Nested Flux Closure Structures in a Tetragonal Ferroelectric
DOI:10.1021/nl400629m  JN:NANO LETTERS  PY:2013
  TC:15  AU: Chang, L. -W.;Nagarajan, V.;Scott, J. F.;Gregg, J. M.;
7:2:9:12     Exotic Domain States in Ferroelectrics: Searching for Vortices and Skyrmions
DOI:10.1080/00150193.2012.678131  JN:FERROELECTRICS  PY:2012
  TC:9  AU: Gregg, J. M.;
7:2:9:13     Nano-Domain Pinning in Ferroelastic-Ferroelectrics by Extended Structural Defects
DOI:10.1002/adfm.201304268  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:2  AU: Ivry, Yachin;Durkan, Colm;Chu, Daping;Scott, James F.;
7:2:9:14     Phase field simulations of stress controlling the vortex domain structures in ferroelectric nanosheets
DOI:10.1063/1.3681379  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:21  AU: Chen, W. J.;Zheng, Yue;Wang, Biao;
7:2:9:15     Coexistence of ferroelectric vortex domains and charged domain walls in epitaxial BiFeO3 film on (110)(o) GdScO3 substrate
DOI:10.1063/1.4722253  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Qi, Yajun;Chen, Zuhuang;Huang, Chuanwei;Wang, Lihua;Han, Xiaodong;Wang, Junling;Yang, Ping;Sritharan, Thirumany;Chen, Lang;
7:2:9:16     Unexpected Controllable Pair-Structure in Ferroelectric Nanodomains
DOI:10.1021/nl202097y  JN:NANO LETTERS  PY:2011
  TC:13  AU: Ivry, Yachin;Chu, Daping;Scott, James F.;Salje, Ekhard K. H.;Durkan, Colm;
7:2:9:17     Electronic Properties of Electrical Vortices in Ferroelectric Nanocomposites from Large-Scale Ab Initio Computations
DOI:10.1021/acs.nanolett.5b00307  JN:NANO LETTERS  PY:2015
  TC:0  AU: Gui, Zhigang;Wang, Lin-Wang;Bellaiche, L.;
7:2:9:18     Ferroelectric and electrical characterization of multiferroic BiFeO3 at the single nanoparticle level
DOI:10.1063/1.3671392  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Vasudevan, R. K.;Bogle, K. A.;Kumar, A.;Jesse, S.;Magaraggia, R.;Stamps, R.;Ogale, S. B.;Potdar, H. S.;Nagarajan, V.;
7:2:9:19     Voltage-Controlled Ferroelastic Switching in Pb(Zr0.2Ti0.8)O-3 Thin Films
DOI:10.1021/nl503806p  JN:NANO LETTERS  PY:2015
  TC:0  AU: Khan, Asif Islam;Marti, Xavier;Serrao, Claudy;Ramesh, Ramamoorthy;Salahuddin, Sayeef;
7:2:9:20     Nucleation, growth, and control of ferroelectric-ferroelastic domains in thin polycrystalline films
DOI:10.1103/PhysRevB.86.205428  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Ivry, Yachin;Scott, James F.;Salje, Ekhard K. H.;Durkan, Colm;
7:2:9:21     Ferroelastic domain wall dynamics in ferroelectric bilayers
DOI:10.1016/j.actamat.2010.06.004  JN:ACTA MATERIALIA  PY:2010
  TC:17  AU: Anbusathaiah, V.;Jesse, S.;Arredondo, M. A.;Kartawidjaja, F. C.;Ovchinnikov, O. S.;Wang, J.;Kalinin, S. V.;Nagarajan, V.;
7:2:9:22     Ferroelectric nanodomains in epitaxial PbTiO3 films grown on SmScO3 and TbScO3 substrates
DOI:10.1063/1.4801966  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:9  AU: Borodavka, F.;Gregora, I.;Bartasyte, A.;Margueron, S.;Plausinaitiene, V.;Abrutis, A.;Hlinka, J.;
7:2:9:23     Room-Temperature Voltage Tunable Phonon Thermal Conductivity via Reconfigurable Interfaces in Ferroelectric Thin Films
DOI:10.1021/nl504505t  JN:NANO LETTERS  PY:2015
  TC:0  AU: Ihlefeld, Jon F.;Foley, Brian M.;Scrymgeour, David A.;Michael, Joseph R.;McKenzie, Bonnie B.;Medlin, Douglas L.;Wallace, Margeaux;Trolier-McKinstry, Susan;Hopkins, Patrick E.;
7:2:9:24     90 degrees domain dynamics and relaxation in thin ferroelectric/ferroelastic films
DOI:10.1103/PhysRevB.81.174118  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Ivry, Yachin;Wang, Nan;Chu, DaPing;Durkan, Colm;
7:2:9:25     Shape-induced phase transition of domain patterns in ferroelectric platelets
DOI:10.1103/PhysRevB.84.064110  JN:PHYSICAL REVIEW B  PY:2011
  TC:19  AU: Schilling, A.;Prosandeev, S.;McQuaid, R. G. P.;Bellaiche, L.;Scott, J. F.;Gregg, J. M.;
7:2:9:26     Effects of the surface charge screening and temperature on the vortex domain patterns of ferroelectric nanodots
DOI:10.1063/1.4766382  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Wu, C. M.;Chen, W. J.;Ma, D. c.;Woo, C. H.;Zheng, Yue;
7:2:9:27     Atomistic Simulation of Strain-Induced Domain Evolution in a Uniaxially Compressed BaTiO3 Single-Crystal Nanofilm
DOI:10.1007/s11664-013-2597-9  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:4  AU: Tian, Xiao Bao;Yang, Xin Hua;Cao, Wei Zhong;
7:2:9:28     Bundles of polytwins as meta-elastic domains in the thin polycrystalline simple multi-ferroic system PZT
DOI:10.1088/0957-4484/21/6/065702  JN:NANOTECHNOLOGY  PY:2010
  TC:14  AU: Ivry, Yachin;Chu, D. P.;Durkan, Colm;
7:2:9:29     Classification of laminate domain patterns in ferroelectrics
DOI:10.1103/PhysRevB.83.184120  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Tsou, N. T.;Potnis, P. R.;Huber, J. E.;
7:2:9:30     Domain annihilation due to temperature and thickness gradients in single-crystal BaTiO3
DOI:10.1103/PhysRevB.85.054113  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: McGilly, L. J.;Burnett, T. L.;Schilling, A.;Cain, M. G.;Gregg, J. M.;
7:2:9:31     Terahertz dynamics of ferroelectric vortices from first principles
DOI:10.1103/PhysRevB.89.064303  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Gui, Zhigang;Bellaiche, L.;
7:2:9:32     Domains Beyond the Grain Boundary
DOI:10.1002/adfm.201002142  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:11  AU: Ivry, Yachin;Chu, Daping;Scott, James F.;Durkan, Colm;
7:2:9:33     Numerical Evaluation of Strain Rate Effect on Mechanical and Electromechanical Coupling Responses in BaTiO3 Single-Crystal Nanofilm
DOI:10.1007/s11664-013-2859-6  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Tian, Xiao Bao;Yang, Xin Hua;Cao, Wei Zhong;
7:2:9:34     Ultrafast switching of ferroelastic nanodomains in bilayered ferroelectric thin films
DOI:10.1063/1.3657468  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Ehara, Y.;Yasui, S.;Nagata, J.;Kan, D.;Anbusathaiah, V.;Yamada, T.;Sakata, O.;Funakubo, H.;Nagarajan, V.;
7:2:9:35     Exploring Vertex Interactions in Ferroelectric Flux-Closure Domains
DOI:10.1021/nl5006788  JN:NANO LETTERS  PY:2014
  TC:5  AU: McQuaid, Raymond G. P.;Gruverman, Alexei;Scott, James F.;Gregg, J. Marty;
7:2:9:36     Natural optical activity and its control by electric field in electrotoroidic systems
DOI:10.1103/PhysRevB.87.195111  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Prosandeev, Sergey;Malashevich, Andrei;Gui, Zhigang;Louis, Lydie;Walter, Raymond;Souza, Ivo;Bellaiche, L.;
7:2:9:37     Collective dynamics in nanostructured polycrystalline ferroelectric thin films using local time-resolved measurements and switching spectroscopy
DOI:10.1016/j.actamat.2009.08.057  JN:ACTA MATERIALIA  PY:2010
  TC:9  AU: Wicks, Samantha;Seal, Katyayani;Jesse, Stephen;Anbusathaiah, Varatharajan;Leach, Sarah;Garcia, R. Edwin;Kalinin, Sergei V.;Nagarajan, Valanoor;
7:2:9:38     Motion, collision and annihilation of polarization vortex pair in single crystalline BaTiO3 thin film
DOI:10.1063/1.4848575  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Tian, Xianbao;Yang, Xinhua;Wang, Peng;Peng, Di;
7:2:9:39     Domain wall contribution to the electrocaloric effect in BaTiO3 nanoparticle: a phase-field investigation
DOI:10.1007/s11051-013-1427-6  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:2  AU: Li, B.;Wang, J. B.;Zhong, X. L.;Wang, F.;Liu, B. L.;Zhou, Y. C.;
7:2:9:40     Collective Dipole Behavior and Unusual Morphotropic Phase Boundary in Ferroelectric Pb(Zr0.5Ti0.5)O-3 Nanowires
DOI:10.1021/nl303749q  JN:NANO LETTERS  PY:2013
  TC:9  AU: Fu, Xiujun;Naumov, Ivan I.;Fu, Huaxiang;
7:2:9:41     Direct observation of asymmetric domain wall motion in a ferroelectric capacitor
DOI:10.1016/j.actamat.2013.07.051  JN:ACTA MATERIALIA  PY:2013
  TC:10  AU: Lee, Jo Kyung;Shin, Ga Young;Song, Kyung;Choi, Woo Seok;Shin, Yoon Ah;Park, Seong Yong;Britson, Jason;Cao, Ye;Chen, Long-Qing;Lee, Ho Nyung;Oh, Sang Ho;
7:2:9:42     Scaling of superdomain bands in ferroelectric dots
DOI:10.1063/1.3571560  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: McGilly, L. J.;Gregg, J. M.;
7:2:9:43     Ferroelectric domain evolution with temperature in BaTiO3 film on (001) SrTiO3 substrate
DOI:10.1063/1.4818138  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Yuan, Guoliang;Chen, Jiangpeng;Xia, Hui;Liu, Junming;Yin, Jiang;Liu, Zhiguo;
7:2:9:44     Dimensionality Crossover in Magnetism: From Domain Walls (2D) to Vortices (1D)
DOI:10.1103/PhysRevLett.104.127204  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:12  AU: Masseboeuf, A.;Fruchart, O.;Toussaint, J. C.;Kritsikis, E.;Buda-Prejbeanu, L.;Cheynis, F.;Bayle-Guillemaud, P.;Marty, A.;
7:2:9:45     Microscopic Insight into Temperature-Graded Ferroelectrics
DOI:10.1103/PhysRevLett.105.147602  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:9  AU: Zhang, Qingteng;Ponomareva, I.;
7:2:9:46     Direct Observations of Retention Failure in Ferroelectric Memories
DOI:10.1002/adma.201103983  JN:ADVANCED MATERIALS  PY:2012
  TC:11  AU: Gao, Peng;Nelson, Christopher T.;Jokisaari, Jacob R.;Zhang, Yi;Baek, Seung-Hyub;Bark, Chung Wung;Wang, Enge;Liu, Yuanming;Li, Jiangyu;Eom, Chang-Beom;Pan, Xiaoqing;
7:2:9:47     Switching mechanism of polarization vortex in single-crystal ferroelectric nanodots
DOI:10.1063/1.3515847  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Wang, Jie;
7:2:9:48     Pinning effects of dislocations on vortex domain structure in ferroelectric nanodots
DOI:10.1063/1.4881884  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chen, W. J.;Zheng, Yue;Wang, Biao;
7:2:9:49     Vortex state in thin films of multicomponent ferroelectrics
DOI:10.1016/j.tsf.2010.12.192  JN:THIN SOLID FILMS  PY:2011
  TC:6  AU: Baudry, Laurent;Sene, Anais;Luk'yanchuk, Igor A.;Lahoche, Laurent;
7:2:9:50     Evolution of compatible laminate domain structures in ferroelectric single crystals
DOI:10.1016/j.actamat.2012.10.015  JN:ACTA MATERIALIA  PY:2013
  TC:5  AU: Tsou, N. T.;Huber, J. E.;Cocks, A. C. F.;
7:2:9:51     Response to "Comment on 'Nanometer resolution piezoreponse force microscopy to study deep submicron ferroelectric and ferroelastic domains' " [Appl. Phys. Lett. 97, 046101 (2010)]
DOI:10.1063/1.3467006  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:0  AU: Durkan, C.;Chu, D. P.;Ivry, Y.;
7:2:9:52     Electrical creep induced ferroelectric domain wall motion in BaTiO3 single crystal
DOI:10.1063/1.3671327  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Liu, Q. D.;Huber, J. E.;
7:2:9:53     Faceting oscillations in nano-ferroelectrics
DOI:10.1063/1.4892362  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Scott, J. F.;Kumar, Ashok;
7:2:9:54     Nanoscale Toroidal Ferroelectricity in PbTiO3
DOI:10.1080/00150193.2012.673916  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Stachiotti, M. G.;Sepliarsky, M.;
7:2:9:55     Superdomain Structure in Epitaxial Tetragonal PZT Thin Films Under Tensile Strain
DOI:10.1080/00150193.2014.893802  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Feigl, L.;McGilly, L. J.;Setter, N.;
7:2:9:56     Bubble polarization domain patterns in periodically ordered epitaxial ferroelectric nanodot arrays
DOI:10.1063/1.3623766  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Gao, X. S.;Xue, F.;Qin, M. H.;Liu, J. M.;Rodriguez, B. J.;Liu, L. F.;Alexe, M.;Hesse, D.;
7:2:9:57     The formation and phase transition of vortex domain structures in ferroelectric nanodots: First-principles-based simulations
DOI:10.1063/1.4815963  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Liu, J. Y.;Chen, W. J.;Wang, B.;Zheng, Yue;
7:2:9:58     Band theory of spatial dispersion in magnetoelectrics
DOI:10.1103/PhysRevB.82.245118  JN:PHYSICAL REVIEW B  PY:2010
  TC:1  AU: Malashevich, Andrei;Souza, Ivo;
7:2:9:59     Flexoelectric rotation of polarization in ferroelectric thin films
DOI:10.1038/NMAT3141  JN:NATURE MATERIALS  PY:2011
  TC:103  AU: Catalan, G.;Lubk, A.;Vlooswijk, A. H. G.;Snoeck, E.;Magen, C.;Janssens, A.;Rispens, G.;Rijnders, G.;Blank, D. H. A.;Noheda, B.;
7:2:9:60     Theoretical study of ferroelectric nanoparticles using phase reconstructed electron microscopy
DOI:10.1103/PhysRevB.89.214112  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Phatak, C.;Petford-Long, A. K.;Beleggia, M.;De Graef, M.;
7:2:9:61     Reversible nanoscale switching of polytwin orientation in a ferroelectric thin film induced by a local electric field
DOI:10.1063/1.4820137  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Garcia-Melendrez, A.;Durkan, C.;
7:2:9:62     Inhomogeneous Polarization Switching in Finite-Size Cubic Ferroelectrics
DOI:10.1080/00150193.2012.673899  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Baudry, Laurent;Luk'yanchuk, Igor A.;Sene, Anais;
7:2:9:63     Enhanced piezoelectric performance from carbon fluoropolymer nanocomposites
DOI:10.1063/1.4768923  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Baur, Cary;DiMaio, Jeffrey R.;McAllister, Elliot;Hossini, Reza;Wagener, Earl;Ballato, John;Priya, Shashank;Ballato, Arthur;Smith, Dennis W., Jr.;
7:2:9:64     Coexistence of toroidal and polar domains in ferroelectric systems: A strategy for switching ferroelectric vortex
DOI:10.1063/1.4881530  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Chen, W. J.;Zheng, Yue;Wang, Biao;Liu, J. Y.;
7:2:9:65     Comment on "Nanometer resolution piezoresponse force microscopy to study deep submicron ferroelectric and ferroelastic domains" [Appl. Phys. Lett. 94, 162903 (2009)]
DOI:10.1063/1.3467005  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Vlooswijk, A. H. G.;Catalan, Gustau;Noheda, Beatriz;
7:2:9:66     Domain evolution and polarization of continuously graded ferroelectric films
DOI:10.1080/14786430903147098  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:3  AU: Roytburd, Alexander;Roytburd, Victor;
7:2:10:1     Large off-diagonal magnetoelectric coupling in the quantum paraelectric antiferromagnet EuTiO3
DOI:10.1103/PhysRevB.81.064426  JN:PHYSICAL REVIEW B  PY:2010
  TC:48  AU: Shvartsman, V. V.;Borisov, P.;Kleemann, W.;Kamba, S.;Katsufuji, T.;
7:2:10:2     Low-symmetry monoclinic ferroelectric phase stabilized by oxygen octahedra rotations in strained EuxSr1-xTiO3 thin films
DOI:10.1103/PhysRevB.87.134102  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Morozovska, Anna N.;Gu, Yijia;Khist, Victoria V.;Glinchuk, Maya D.;Chen, Long-Qing;Gopalan, Venkatraman;Eliseev, Eugene A.;
7:2:10:3     Relation between structural instabilities in EuTiO3 and SrTiO3
DOI:10.1103/PhysRevB.83.212102  JN:PHYSICAL REVIEW B  PY:2011
  TC:39  AU: Bussmann-Holder, A.;Koehler, J.;Kremer, R. K.;Law, J. M.;
7:2:10:4     Role of intrinsic disorder in the structural phase transition of magnetoelectric EuTiO3
DOI:10.1103/PhysRevB.85.184107  JN:PHYSICAL REVIEW B  PY:2012
  TC:34  AU: Allieta, Mattia;Scavini, Marco;Spalek, Leszek J.;Scagnoli, Valerio;Walker, Helen C.;Panagopoulos, Christos;Saxena, Siddharth S.;Katsufuji, Takuro;Mazzoli, Claudio;
7:2:10:5     Antiferrodistortive phase transition in EuTiO3
DOI:10.1103/PhysRevB.86.054112  JN:PHYSICAL REVIEW B  PY:2012
  TC:23  AU: Goian, V.;Kamba, S.;Pacherova, O.;Drahokoupil, J.;Palatinus, L.;Dusek, M.;Rohlicek, J.;Savinov, M.;Laufek, F.;Schranz, W.;Fuith, A.;Kachlik, M.;Maca, K.;Shkabko, A.;Sagarna, L.;Weidenkaff, A.;Belik, A. A.;
7:2:10:6     Origin of giant spin-lattice coupling and the suppression of ferroelectricity in EuTiO3 from first principles
DOI:10.1103/PhysRevB.88.094103  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Birol, Turan;Fennie, Craig J.;
7:2:10:7     New multiferroics based on EuxSr1-xTiO3 nanotubes and nanowires
DOI:10.1063/1.4774208  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:14  AU: Eliseev, Eugene A.;Glinchuk, Maya D.;Khist, Victoria V.;Lee, Chan-Woo;Deo, Chaitanya S.;Behera, Rakesh K.;Morozovska, Anna N.;
7:2:10:8     Emergent Superstructural Dynamic Order due to Competing Antiferroelectric and Antiferrodistortive Instabilities in Bulk EuTiO3
DOI:10.1103/PhysRevLett.110.027201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:21  AU: Kim, Jong-Woo;Thompson, Paul;Brown, Simon;Normile, Peter S.;Schlueter, John A.;Shkabko, Andrey;Weidenkaff, Anke;Ryan, Philip J.;
7:2:10:9     First-principles prediction of oxygen octahedral rotations in perovskite-structure EuTiO3
DOI:10.1103/PhysRevB.85.104109  JN:PHYSICAL REVIEW B  PY:2012
  TC:20  AU: Rushchanskii, Konstantin Z.;Spaldin, Nicola A.;Lezaic, Marjana;
7:2:10:10     Strong Spin-Lattice Coupling Through Oxygen Octahedral Rotation in Divalent Europium Perovskites
DOI:10.1002/adfm.201202477  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:12  AU: Akamatsu, Hirofumi;Kumagai, Yu;Oba, Fumiyasu;Fujita, Koji;Tanaka, Katsuhisa;Tanaka, Isao;
7:2:10:11     Antiferromagnetic superexchange via 3d states of titanium in EuTiO3 as seen from hybrid Hartree-Fock density functional calculations
DOI:10.1103/PhysRevB.83.214421  JN:PHYSICAL REVIEW B  PY:2011
  TC:26  AU: Akamatsu, Hirofumi;Kumagai, Yu;Oba, Fumiyasu;Fujita, Koji;Murakami, Hideo;Tanaka, Katsuhisa;Tanaka, Isao;
7:2:10:12     Structural control of magnetic anisotropy in a strain-driven multiferroic EuTiO3 thin film
DOI:10.1103/PhysRevB.88.094434  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Ke, X.;Birol, T.;Misra, R.;Lee, J. -H.;Kirby, B. J.;Schlom, D. G.;Fennie, C. J.;Freeland, J. W.;
7:2:10:13     Strain dependent ultrafast carrier dynamics in EuTiO3 films
DOI:10.1063/1.4898787  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Zhong-guo;Zhao, Run;Li, Weiwei;Wang, Haiyan;Yang, Hao;Song, Ying-lin;
7:2:10:14     Understanding and Revisiting Properties of EuTiO3 Bulk Material and Films from First Principles
DOI:10.1103/PhysRevLett.109.267602  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:15  AU: Yang, Yurong;Ren, Wei;Wang, Dawei;Bellaiche, L.;
7:2:10:15     Electric-field induced ferromagnetic phase in paraelectric antiferromagnets
DOI:10.1103/PhysRevB.89.014112  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Glinchuk, Maya D.;Eliseev, Eugene A.;Gu, Yijia;Chen, Long-Qing;Gopalan, Venkatraman;Morozovska, Anna N.;
7:2:10:16     EuTiO3 magnetic structure studied by neutron powder diffraction and resonant x-ray scattering
DOI:10.1103/PhysRevB.86.094432  JN:PHYSICAL REVIEW B  PY:2012
  TC:13  AU: Scagnoli, Valerio;Allieta, Mattia;Walker, Helen;Scavini, Marco;Katsufuji, Takuro;Sagarna, Leyre;Zaharko, Oksana;Mazzoli, Claudio;
7:2:10:17     Lattice instabilities in bulk EuTiO3
DOI:10.1103/PhysRevB.88.144308  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Bessas, D.;Rushchanskii, K. Z.;Kachlik, M.;Disch, S.;Gourdon, O.;Bednarcik, J.;Maca, K.;Sergueev, I.;Kamba, S.;Lezaic, M.;Hermann, R. P.;
7:2:10:18     Electric field modulation of the tetragonal domain orientation revealed in the magnetic ground state of quantum paraelectric EuTiO3
DOI:10.1103/PhysRevB.87.064103  JN:PHYSICAL REVIEW B  PY:2013
  TC:13  AU: Petrovic, A. P.;Kato, Y.;Sunku, S. S.;Ito, T.;Sengupta, P.;Spalek, L.;Shimuta, M.;Katsufuji, T.;Batista, C. D.;Saxena, S. S.;Panagopoulos, C.;
7:2:10:19     Elastic and anelastic relaxations associated with phase transitions in EuTiO3
DOI:10.1103/PhysRevB.90.054119  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Spalek, Leszek J.;Saxena, Siddharth S.;Panagopoulos, Christos;Katsufuji, Takuro;Schiemer, Jason A.;Carpenter, Michael A.;
7:2:10:20     Ferroelectricity and ferromagnetism in EuTiO3 nanowires
DOI:10.1103/PhysRevB.84.205403  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Morozovska, Anna N.;Glinchuk, Maya D.;Behera, Rakesh K.;Zaulychny, Basil;Deo, Chaitanya S.;Eliseev, Eugene A.;
7:2:10:21     Magnetodielectric effect and phonon properties of compressively strained EuTiO3 thin films deposited on (001)(LaAlO3)(0.29)-(SrAl1/2Ta1/2O3)(0.71)
DOI:10.1103/PhysRevB.85.094435  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Kamba, S.;Goian, V.;Orlita, M.;Nuzhnyy, D.;Lee, J. H.;Schlom, D. G.;Rushchanskii, K. Z.;Lezaic, M.;Birol, T.;Fennie, C. J.;Gemeiner, P.;Dkhil, B.;Bovtun, V.;Kempa, M.;Hlinka, J.;Petzelt, J.;
7:2:10:22     Electronic structure and thermoelectric properties of nanostructured EuTi1-xNbxO3-delta (x=0.00; 0.02)
DOI:10.1063/1.4737872  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Sagarna, L.;Shkabko, A.;Populoh, S.;Karvonen, L.;Weidenkaff, A.;
7:2:10:23     Structure and thermoelectric properties of EuTi(O,N)(3 +/-delta)
DOI:10.1063/1.4813098  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Sagarna, L.;Rushchanskii, K. Z.;Maegli, A.;Yoon, S.;Populoh, S.;Shkabko, A.;Pokrant, S.;Lezaic, M.;Waser, R.;Weidenkaff, A.;
7:2:10:24     Lattice dynamical analogies and differences between SrTiO3 and EuTiO3 revealed by phonon-dispersion relations and double-well potentials
DOI:10.1103/PhysRevB.84.184114  JN:PHYSICAL REVIEW B  PY:2011
  TC:18  AU: Bettis, Jerry L.;Whangbo, Myung-Hwan;Koehler, Juergen;Bussmann-Holder, Annette;Bishop, A. R.;
7:2:10:25     Evidence for the first-order nature of the structural instability in EuTiO3 from thermal expansion measurements
DOI:10.1103/PhysRevB.90.104105  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Reuvekamp, Patrick G.;Kremer, Reinhard K.;Koehler, Juergen;Bussmann-Holder, Annette;
7:2:10:26     Tuning the structural instability of SrTiO3 by Eu doping: The phase diagram of Sr1-xEuxTiO3
DOI:10.1103/PhysRevB.85.134113  JN:PHYSICAL REVIEW B  PY:2012
  TC:15  AU: Guguchia, Zurab;Shengelaya, Alexander;Keller, Hugo;Koehler, Juergen;Bussmann-Holder, Annette;
7:2:10:27     Spin-lattice coupling induced weak dynamical magnetism in EuTiO3 at high temperatures
DOI:10.1103/PhysRevB.90.064413  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Guguchia, Z.;Keller, H.;Kremer, R. K.;Koehler, J.;Luetkens, H.;Goko, T.;Amato, A.;Bussmann-Holder, A.;
7:2:10:28     Ferromagnetic behavior in mixed valence europium (Eu2+/Eu3+) oxide EuTi1-xMxO3 (M = Al3+ and Ga3+)
DOI:10.1063/1.4826942  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Akahoshi, Daisuke;Horie, Hiroki;Sakai, Shingo;Saito, Toshiaki;
7:2:10:29     Evidence of Eu2+ 4f electrons in the valence band spectra of EuTiO3 and EuZrO3
DOI:10.1063/1.4761933  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Kolodiazhnyi, T.;Valant, M.;Williams, J. R.;Bugnet, M.;Botton, G. A.;Ohashi, N.;Sakka, Y.;
7:2:10:30     Magnetic inhomogeneity in a multiferroic EuTiO3 thin film
DOI:10.1103/PhysRevB.87.121109  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Geng, Yanan;Lee, J. H.;Schlom, D. G.;Freeland, J. W.;Wu, Weida;
7:2:10:31     Tuning cationic composition of La: EuTiO3-delta films
DOI:10.1063/1.4831856  JN:APL MATERIALS  PY:2013
  TC:0  AU: Shkabko, Andrey;Xu, Chencheng;Meuffels, Paul;Gunkel, Felix;Dittmann, Regina;Weidenkaff, Anke;Waser, Rainer;
7:2:10:32     Hyper-sensitive piezophotovoltaic effects in ferroelectric nanocylinders
DOI:10.1063/1.3428477  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Zheng, Yue;Woo, C. H.;
7:2:10:33     Analytical prediction of size-induced ferroelectricity in BaO nanowires under stress
DOI:10.1103/PhysRevB.81.092101  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Morozovska, Anna N.;Eliseev, E. A.;Glinchuk, Maya D.;Blinc, Robert;
7:2:10:34     Phenomenological thermodynamic potential for CaTiO3 single crystals
DOI:10.1103/PhysRevB.85.064117  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Gu, Yijia;Rabe, Karin;Bousquet, Eric;Gopalan, Venkatraman;Chen, Long-Qing;
7:2:10:35     Spin-lattice coupling induced crossover from negative to positive magnetostriction in EuTiO3
DOI:10.1103/PhysRevB.90.094420  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Reuvekamp, P. G.;Kremer, R. K.;Koehler, J.;Bussmann-Holder, A.;
7:2:10:36     Spin Resonance in EuTiO3 Probed by Time-Domain Gigahertz Ellipsometry
DOI:10.1103/PhysRevLett.106.217601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:11  AU: van Mechelen, J. L. M.;van der Marel, D.;Crassee, I.;Kolodiazhnyi, T.;
7:2:10:37     Growth and Characterization of EuTiO3 Single Crystals
DOI:10.1080/00150193.2012.741930  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Ellis, D. S.;Uchiyama, H.;Sugimoto, K.;Kato, K.;Baron, A. Q. R.;
7:2:10:38     Phonon softening and dispersion in EuTiO3
DOI:10.1103/PhysRevB.86.220301  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;
7:2:10:39     Cr-doping induced ferromagnetic behavior in antiferromagnetic EuTiO3 nanoparticles
DOI:10.1016/j.apsusc.2011.07.129  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:4  AU: Wei, T.;Song, Q. G.;Zhou, Q. J.;Li, Z. P.;Qi, X. L.;Liu, W. P.;Guo, Y. R.;Liu, J. -M.;
7:2:10:40     The interaction of multifold polar orderings in Ba-doped Sr0.7Ca0.3TiO3
DOI:10.1016/j.materresbull.2012.03.013  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:2  AU: Wei, T.;Zhou, Q. J.;Song, Q. G.;Li, Z. P.;Guo, S. Q.;Guo, Y. R.;Chen, Y. F.;Qi, X. L.;Liu, J. -M.;
7:2:10:41     Probing Local and Global Ferroelectric Phase Stability and Polarization Switching in Ordered Macroporous PZT
DOI:10.1002/adfm.201002038  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:9  AU: McLachlan, Martyn A.;McComb, David W.;Ryan, Mary P.;Morozovska, Anna N.;Eliseev, Eugene A.;Payzant, E. Andrew;Jesse, Stephen;Seal, Katyayani;Baddorf, Arthur P.;Kalinin, Sergei V.;
7:2:10:42     Research Update: Magnetic phase diagram of EuTi1-xBxO3 (B = Zr, Nb)
DOI:10.1063/1.4902137  JN:APL MATERIALS  PY:2014
  TC:1  AU: Li, Ling;Zhou, Haidong;Yan, Jiaqiang;Mandrus, David;Keppens, Veerle;
7:2:10:43     Preparation, magnetic characterization, and optical band gap of EuTiO3 nanoparticles
DOI:10.1016/j.apsusc.2010.12.112  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:6  AU: Wei, T.;Liu, H. P.;Chen, Y. F.;Yan, H. Y.;Liu, J. -M.;
7:2:10:44     Processing of phase pure and dense bulk EuTiO3 ceramics and their infrared reflectivity spectra
DOI:10.1016/j.matlet.2012.01.055  JN:MATERIALS LETTERS  PY:2012
  TC:8  AU: Kachlik, M.;Maca, K.;Goian, V.;Kamba, S.;
7:2:10:45     Full compensation of oxygen vacancies in EuTiO3 (001) epitaxial thin film stabilized by a SrTiO3 surface protection layer
DOI:10.1063/1.4789778  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Shimamoto, K.;Hatabayashi, K.;Hirose, Y.;Nakao, S.;Fukumura, T.;Hasegawa, T.;
7:2:10:46     An electrode-free method of characterizing the microwave dielectric properties of high-permittivity thin films
DOI:10.1063/1.3537835  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Bovtun, V.;Pashkov, V.;Kempa, M.;Kamba, S.;Eremenko, A.;Molchanov, V.;Poplavko, Y.;Yakymenko, Y.;Lee, J. H.;Schlom, D. G.;
7:2:10:47     Theory of quantum paraelectrics and the metaelectric transition
DOI:10.1103/PhysRevB.81.024102  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Conduit, G. J.;Simons, B. D.;
7:2:10:48     Antiferrodistortive Structural Phase Transition in Compressively-Strained Epitaxial SrTiO3 Film Grown on (La, Sr)(Al, Ta)O-3 Substrate
DOI:10.1080/10584587.2010.488545  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:3  AU: Yamada, T.;Kiguchi, T.;Tagantsev, A. K.;Morioka, H.;Iijima, T.;Ohsumi, H.;Kimura, S.;Osada, M.;Setter, N.;Funakubo, H.;
7:2:10:49     Phase transition and thermal expansion of the LaAlO3 single crystal at high temperatures
DOI:10.1016/j.jallcom.2014.01.143  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Wang, Jun;Ishizawa, Nobuo;Ye, Xinxin;
7:2:10:50     The interaction of multifold polar orderings in Ba-doped Sr0.7Ca0.3TiO3 (vol 47, pg 1316, 2012)
DOI:10.1016/j.materresbull.2012.05.012  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:0  AU: Wei, T.;Zhou, Q. J.;Song, Q. G.;Li, Z. P.;Guo, S. Q.;Guo, Y. R.;Chen, Y. F.;Qi, X. L.;Liu, J. -M.;
7:2:10:51     A multiferroic material to search for the permanent electric dipole moment of the electron
DOI:10.1038/NMAT2799  JN:NATURE MATERIALS  PY:2010
  TC:34  AU: Rushchanskii, K. Z.;Kamba, S.;Goian, V.;Vanek, P.;Savinov, M.;Prokleska, J.;Nuzhnyy, D.;Knizek, K.;Laufek, F.;Eckel, S.;Lamoreaux, S. K.;Sushkov, A. O.;Lezaic, M.;Spaldin, N. A.;
7:2:11:1     Giant Flexoelectric Effect in Ferroelectric Epitaxial Thin Films
DOI:10.1103/PhysRevLett.107.057602  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:62  AU: Lee, D.;Yoon, A.;Jang, S. Y.;Yoon, J. -G.;Chung, J. -S.;Kim, M.;Scott, J. F.;Noh, T. W.;
7:2:11:2     Nanoscale Flexoelectricity
DOI:10.1002/adma.201203852  JN:ADVANCED MATERIALS  PY:2013
  TC:35  AU: Nguyen, Thanh D.;Mao, Sheng;Yeh, Yao-Wen;Purohit, Prashant K.;McAlpine, Michael C.;
7:2:11:3     Fundamentals of flexoelectricity in solids
DOI:10.1088/0957-4484/24/43/432001  JN:NANOTECHNOLOGY  PY:2013
  TC:37  AU: Yudin, P. V.;Tagantsev, A. K.;
7:2:11:4     Finite-temperature flexoelectricity in ferroelectric thin films from first principles
DOI:10.1103/PhysRevB.85.104101  JN:PHYSICAL REVIEW B  PY:2012
  TC:26  AU: Ponomareva, I.;Tagantsev, A. K.;Bellaiche, L.;
7:2:11:5     Flexoelectric nano-generator: Materials, structures and devices
DOI:10.1016/j.nanoen.2013.09.001  JN:NANO ENERGY  PY:2013
  TC:15  AU: Jiang, Xiaoning;Huang, Wenbin;Zhang, Shujun;
7:2:11:6     Piezoelectric thin-film superlattices without using piezoelectric materials
DOI:10.1063/1.3443404  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:37  AU: Sharma, N. D.;Landis, C. M.;Sharma, P.;
7:2:11:7     Towards a Bulk Theory of Flexoelectricity
DOI:10.1103/PhysRevLett.105.127601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:36  AU: Resta, Raffaele;
7:2:11:8     First-principles theory of frozen-ion flexoelectricity
DOI:10.1103/PhysRevB.84.180101  JN:PHYSICAL REVIEW B  PY:2011
  TC:26  AU: Hong, Jiawang;Vanderbilt, David;
7:2:11:9     First-principles theory and calculation of flexoelectricity
DOI:10.1103/PhysRevB.88.174107  JN:PHYSICAL REVIEW B  PY:2013
  TC:9  AU: Hong, Jiawang;Vanderbilt, David;
7:2:11:10     Flexoelectric Control of Defect Formation in Ferroelectric Epitaxial Thin Films
DOI:10.1002/adma.201400654  JN:ADVANCED MATERIALS  PY:2014
  TC:4  AU: Lee, Daesu;Jeon, Byung Chul;Yoon, Aram;Shin, Yeong Jae;Lee, Myang Hwan;Song, Tae Kwon;Bu, Sang Don;Kim, Miyoung;Chung, Jin-Seok;Yoon, Jong-Gul;Noh, Tae Won;
7:2:11:11     Relationship between direct and converse flexoelectric coefficients
DOI:10.1063/1.4897647  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Shu, Longlong;Li, Fei;Huang, Wenbin;Wei, Xiaoyong;Yao, Xi;Jiang, Xiaoning;
7:2:11:12     Flexoelectricity from density-functional perturbation theory
DOI:10.1103/PhysRevB.88.174106  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Stengel, Massimiliano;
7:2:11:13     Enhanced direct flexoelectricity in paraelectric phase of Ba(Ti0.87Sn0.13)O-3 ceramics
DOI:10.1063/1.4802450  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Shu, Longlong;Wei, Xiaoyong;Jin, Li;Li, Yong;Wang, Hong;Yao, Xi;
7:2:11:14     Converse flexoelectric coefficient f(1212) in bulk Ba0.67Sr0.33TiO3
DOI:10.1063/1.4882060  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Shu, Longlong;Huang, Wenbin;Kwon, Seol Ryung;Wang, Zhao;Li, Fei;Wei, Xiaoyong;Zhang, Shujun;Lanagan, Michael;Yao, Xi;Jiang, Xiaoning;
7:2:11:15     Giant flexoelectricity in Ba0.6Sr0.4TiO3/Ni0.8Zn0.2Fe2O4 composite
DOI:10.1063/1.4899060  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Yong;Shu, Longlong;Huang, Wenbin;Jiang, Xiaoning;Wang, Hong;
7:2:11:16     Study of defect-dipoles in an epitaxial ferroelectric thin film
DOI:10.1063/1.3298362  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:21  AU: Folkman, C. M.;Baek, S. H.;Nelson, C. T.;Jang, H. W.;Tybell, T.;Pan, X. Q.;Eom, C. B.;
7:2:11:17     Influence of flexoelectric effects on multiferroic nanocomposite thin bilayer films
DOI:10.1063/1.4757013  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Chen, H. T.;Soh, A. K.;
7:2:11:18     Size effects on electromechanical coupling fields of a bending piezoelectric nanoplate due to surface effects and flexoelectricity
DOI:10.1063/1.4897367  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhang, Zhengrong;Jiang, Liying;
7:2:11:19     Symmetry of flexoelectric coefficients in crystalline medium
DOI:10.1063/1.3662196  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:23  AU: Shu, Longlong;Wei, Xiaoyong;Pang, Ting;Yao, Xi;Wang, Chunlei;
7:2:11:20     Computational evaluation of the flexoelectric effect in dielectric solids
DOI:10.1063/1.4893974  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Abdollahi, Amir;Peco, Christian;Millan, Daniel;Arroyo, Marino;Arias, Irene;
7:2:11:21     Flexoelectric effect on the electroelastic responses and vibrational behaviors of a piezoelectric nanoplate
DOI:10.1063/1.4886315  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Zhang, Zhengrong;Yan, Zhi;Jiang, Liying;
7:2:11:22     Flexoelectric Effect in the Reversal of Self-Polarization and Associated Changes in the Electronic Functional Properties of BiFeO3 Thin Films
DOI:10.1002/adma.201301601  JN:ADVANCED MATERIALS  PY:2013
  TC:12  AU: Jeon, Byung Chul;Lee, Daesu;Lee, Myang Hwan;Yang, Sang Mo;Chae, Seung Chul;Song, Tae Kwon;Bu, Sang Don;Chung, Jin-Seok;Yoon, Jong-Gul;Noh, Tae Won;
7:2:11:23     Experimental studies on the direct flexoelectric effect in alpha-phase polyvinylidene fluoride films
DOI:10.1063/1.3599520  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Baskaran, Sivapalan;He, Xiangtong;Chen, Qin;Fu, John Y.;
7:2:11:24     Flexoelectric effect on the electroelastic responses of bending piezoelectric nanobeams
DOI:10.1063/1.4804949  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Yan, Z.;Jiang, L. Y.;
7:2:11:25     An ab initio investigation of flexoelectric effect in ultrathin BaTiO3 nanotubes
DOI:10.1063/1.4866355  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yin, Binglun;Qu, Shaoxing;
7:2:11:26     Interesting Evidence for Template-Induced Ferroelectric Behavior in Ultra-Thin Titanium Dioxide Films Grown on (110) Neodymium Gallium Oxide Substrates
DOI:10.1002/adfm.201302946  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:1  AU: Deepak, Nitin;Caro, Miguel A.;Keeney, Lynette;Pemble, Martyn E.;Whatmore, Roger W.;
7:2:11:27     Flexoelectricity in several thermoplastic and thermosetting polymers
DOI:10.1063/1.4750064  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:12  AU: Chu, Baojin;Salem, D. R.;
7:2:11:28     Origin of the vanishing critical thickness for ferroelectricity in free-standing PbTiO3 ultrathin films from first principles
DOI:10.1063/1.4817503  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Yin, Binglun;Qu, Shaoxing;
7:2:11:29     Flexoelectric Rectification of Charge Transport in Strain-Graded Dielectrics
DOI:10.1021/nl3038129  JN:NANO LETTERS  PY:2012
  TC:5  AU: Lee, Daesu;Yang, Sang Mo;Yoon, Jong-Gul;Noh, Tae Won;
7:2:11:30     Strain-gradient-induced switching of nanoscale domains in free-standing ultrathin films
DOI:10.1103/PhysRevB.89.174104  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Belletti, G. D.;Dalosto, S. D.;Tinte, Silvia;
7:2:11:31     Active Control of Ferroelectric Switching Using Defect-Dipole Engineering
DOI:10.1002/adma.201203101  JN:ADVANCED MATERIALS  PY:2012
  TC:8  AU: Lee, Daesu;Jeon, Byung Chul;Baek, Seung Hyub;Yang, Sang Mo;Shin, Yeong Jae;Kim, Tae Heon;Kim, Yong Su;Yoon, Jong-Gul;Eom, Chang Beom;Noh, Tae Won;
7:2:11:32     Coaxing graphene to be piezoelectric
DOI:10.1063/1.3676084  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:19  AU: Chandratre, Swapnil;Sharma, Pradeep;
7:2:11:33     Enhanced flexoelectric effect in a non-ferroelectric composite
DOI:10.1063/1.4824168  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Li, Yong;Shu, Longlong;Zhou, Yongcun;Guo, Jing;Xiang, Feng;He, Li;Wang, Hong;
7:2:11:34     Flexoelectricity in barium strontium titanate thin film
DOI:10.1063/1.4898139  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kwon, Seol Ryung;Huang, Wenbin;Shu, Longlong;Yuan, Fuh-Gwo;Maria, Jon-Paul;Jiang, Xiaoning;
7:2:11:35     Flexoelectric effect in finite samples
DOI:10.1063/1.4745037  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:19  AU: Tagantsev, Alexander K.;Yurkov, Alexander S.;
7:2:11:36     Strain gradient induced electric polarization in alpha-phase polyvinylidene fluoride films under bending conditions
DOI:10.1063/1.3673817  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Baskaran, Sivapalan;He, Xiangtong;Wang, Yu;Fu, John Y.;
7:2:11:37     Giant Flexoelectric Polarization in a Micromachined Ferroelectric Diaphragm
DOI:10.1002/adfm.201200839  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:9  AU: Wang, Zhihong;Zhang, Xi Xiang;Wang, Xianbin;Yue, Weisheng;Li, Jingqi;Miao, Jianmin;Zhu, Weiguang;
7:2:11:38     Quasi-Amorphous Inorganic Thin Films: Non-Crystalline Polar Phases
DOI:10.1002/adma.200903232  JN:ADVANCED MATERIALS  PY:2010
  TC:10  AU: Wachtel, Ellen;Lubomirsky, Igor;
7:2:11:39     Piezoelectricity and local structural distortions in (Na0.5Bi0.5)(1-x)SrxTiO3-Bi12TiO20 flexoelectric-type polar ceramics
DOI:10.1063/1.4744952  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Wang, L. H.;Zhao, M. L.;Wang, C. L.;Wang, J.;Kuai, W. J.;Tao, X. T.;
7:2:11:40     Strain induced low mechanical switching force in ultrathin PbZr0.2Ti0.8O3 films
DOI:10.1063/1.4889892  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Guo, E. J.;Roth, R.;Das, S.;Doerr, K.;
7:2:11:41     Surface effects on the wrinkling of piezoelectric films on compliant substrates
DOI:10.1063/1.3664750  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Li, Yuhang;Fang, Bo;Zhang, Jiazhong;Song, Jizhou;
7:2:11:42     Temperature dependence of flexoelectric response in ferroelectric and relaxor polymer thin films
DOI:10.1063/1.4895988  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Poddar, Shashi;Ducharme, Stephen;
7:2:11:43     Measurement of the flexoelectric response in ferroelectric and relaxor polymer thin films
DOI:10.1063/1.4829622  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Poddar, Shashi;Ducharme, Stephen;
7:2:11:44     Origin of the enhanced flexoelectricity of relaxor ferroelectrics
DOI:10.1063/1.4871686  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Narvaez, Jackeline;Catalan, Gustau;
7:2:11:45     Effect of composition on the structure and piezoelectricity of Na0.5Bi4.5Ti4O15-based flexoelectric-type polar ceramics
DOI:10.1016/j.jallcom.2013.01.077  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Kuai, W. J.;Zhao, M. L.;Wang, C. L.;Wang, L. H.;Wang, J.;Gai, Z. G.;Zhang, J. L.;Yin, N.;
7:2:11:46     Fabrication and measurement of a flexoelectric micro-pyramid composite
DOI:10.1063/1.4904024  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Huang, Wenbin;Shu, Longlong;Kwon, Seol Ryung;Zhang, Shujun;Yuan, Fuh-Gwo;Jiang, Xiaoning;
7:2:11:47     Elucidating the mechanism for indentation size-effect in dielectrics
DOI:10.1063/1.4753799  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Robinson, C. R.;White, K. W.;Sharma, P.;
7:2:11:48     Piezoelectricity above the Curie temperature? Combining flexoelectricity and functional grading to enable high-temperature electromechanical coupling
DOI:10.1063/1.4869478  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Mbarki, R.;Baccam, N.;Dayal, Kaushik;Sharma, P.;
7:2:11:49     Amorphous phases and piezoelectricity in (Na0.5Bi0.5)(0.94)Ba0.06TiO3-Bi12TiO20 flexoelectric-type nanocomposite ceramics
DOI:10.1016/j.scriptamat.2010.03.057  JN:SCRIPTA MATERIALIA  PY:2010
  TC:5  AU: Zhao, Minglei;Wang, Lihai;Wang, Chunlei;Zhang, Jialiang;Gai, Zhigang;Wang, Chunming;Li, Jichao;
7:2:11:50     Flexoelectric strain gradient detection using Ba0.64Sr0.36TiO3 for sensing
DOI:10.1063/1.4772803  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Huang, Wenbin;Yan, Xiang;Kwon, Seol Ryung;Zhang, Shujun;Yuan, Fuh-Gwo;Jiang, Xiaoning;
7:2:11:51     Upper bounds for flexoelectric coefficients in ferroelectrics
DOI:10.1063/1.4865208  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Yudin, P. V.;Ahluwalia, R.;Tagantsev, A. K.;
7:2:11:52     Symmetry of flexoelectric coefficients in crystalline medium (vol 110, 104106, 2011)
DOI:10.1063/1.4896397  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Shu, Longlong;Wei, Xiaoyong;Pang, Ting;Yao, Xi;Wang, Chunlei;
7:2:11:53     Structural Determinants of the Sign of the Pyroelectric Effect in Quasi-Amorphous SrTiO3 Films
DOI:10.1002/adfm.201001613  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:5  AU: Shelukhin, Victor;Ehre, David;Lavert, Etay;Wachtel, Ellen;Feldman, Yishay;Tagantsev, Alexander;Lubomirsky, Igor;
7:2:11:54     Detection of a piezoelectric effect in thin films of thermally grown SiO2 via lock-in ellipsometry
DOI:10.1063/1.4731287  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Lazovski, Guy;Wachtel, Ellen;Lubomirsky, Igor;
7:2:11:55     Wet Chemical Etching Process of BST Thin Films for Pyroelectric Infrared Detectors
DOI:10.1080/00150193.2010.492740  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Zhang, Tianjin;Huang, He;Chen, Ren;
7:2:11:56     Converse piezoelectric responses in nonpiezoelectric materials implemented via asymmetric configurations of electrodes
DOI:10.1063/1.3486459  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Baskaran, Sivapalan;Thiruvannamalai, Sankar;Heo, Hyun;Lee, Ho Joon;Francis, Sebastian Maliyakal;Ramachandran, Narayanan;Fu, John Y.;
7:2:11:57     Electric-field-induced stress relaxation in alpha-phase poly(vinylidene fluoride) films
DOI:10.1016/j.matlet.2014.05.109  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: He, Xiangtong;Pei, Shaopeng;Baier, Robert E.;Fu, John Y.;
7:2:11:58     On the theory of the universal dielectric relaxation
DOI:10.1080/14786435.2014.897037  JN:PHILOSOPHICAL MAGAZINE  PY:2014
  TC:2  AU: Fu, John Y.;
7:2:12:1     Hybrid Improper Ferroelectricity: A Mechanism for Controllable Polarization-Magnetization Coupling
DOI:10.1103/PhysRevLett.106.107204  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:97  AU: Benedek, Nicole A.;Fennie, Craig J.;
7:2:12:2     Octahedral Rotation-Induced Ferroelectricity in Cation Ordered Perovskites
DOI:10.1002/adma.201104674  JN:ADVANCED MATERIALS  PY:2012
  TC:68  AU: Rondinelli, James M.;Fennie, Craig J.;
7:2:12:3     Turning ABO(3) Antiferroelectrics into Ferroelectrics: Design Rules for Practical Rotation-Driven Ferroelectricity in Double Perovskites and A(3)B(2)O(7) Ruddlesden-Popper Compounds
DOI:10.1002/adfm.201300210  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:48  AU: Mulder, Andrew T.;Benedek, Nicole A.;Rondinelli, James M.;Fennie, Craig J.;
7:2:12:4     Hybrid Improper Ferroelectricity in a Multiferroic and Magnetoelectric Metal-Organic Framework
DOI:10.1002/adma.201204738  JN:ADVANCED MATERIALS  PY:2013
  TC:61  AU: Stroppa, A.;Barone, P.;Jain, P.;Perez-Mato, J. M.;Picozzi, S.;
7:2:12:5     Tuning the Ferroelectric Polarization in a Multiferroic Metal-Organic Framework
DOI:10.1021/ja408283a  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2013
  TC:21  AU: Di Sante, Domenico;Stroppa, Alessandro;Jain, Prashant;Picozzi, Silvia;
7:2:12:6     Microscopic origin of pressure-induced isosymmetric transitions in fluoromanganate cryolites
DOI:10.1103/PhysRevB.90.094114  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Charles, Nenian;Rondinelli, James M.;
7:2:12:7     Ab initio study of proper topological ferroelectricity in layered perovskite La2Ti2O7
DOI:10.1103/PhysRevB.84.075121  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Lopez-Perez, Jorge;Iniguez, Jorge;
7:2:12:8     MULTIFERROICS Coupling of three lattice instabilities
DOI:10.1038/nmat3003  JN:NATURE MATERIALS  PY:2011
  TC:29  AU: Ghosez, Philippe;Triscone, Jean-Marc;
7:2:12:9     Octahedral tilting-induced ferroelectricity in ASnO(3)/A ' SnO3 superlattices (A, A '=Ca, Sr, and Ba)
DOI:10.1103/PhysRevB.88.014101  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Sim, Hyunsu;Cheong, S. W.;Kim, Bog G.;
7:2:12:10     Electric control of the magnetization in BiFeO3/LaFeO3 superlattices
DOI:10.1103/PhysRevB.88.060102  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Zanolli, Zeila;Wojdel, Jacek C.;Iniguez, Jorge;Ghosez, Philippe;
7:2:12:11     Universal collaborative couplings between oxygen-octahedral rotations and antiferroelectric distortions in perovskites
DOI:10.1103/PhysRevB.88.014104  JN:PHYSICAL REVIEW B  PY:2013
  TC:11  AU: Bellaiche, L.;Iniguez, Jorge;
7:2:12:12     Atomic Scale Design of Polar Perovskite Oxides without Second-Order Jahn-Teller Ions
DOI:10.1021/cm402550q  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:13  AU: Young, Joshua;Rondinelli, James M.;
7:2:12:13     Mechanical Tunability via Hydrogen Bonding in Metal-Organic Frameworks with the Perovskite Architecture
DOI:10.1021/ja500618z  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2014
  TC:6  AU: Li, Wei;Thirumurugan, A.;Barton, Phillip T.;Lin, Zheshuai;Henke, Sebastian;Yeung, Hamish H. -M.;Wharmby, Michael T.;Bithell, Erica G.;Howard, Christopher J.;Cheetham, Anthony K.;
7:2:12:14     Electrical properties of improper ferroelectrics from first principles
DOI:10.1103/PhysRevB.86.094112  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Stengel, Massimiliano;Fennie, Craig J.;Ghosez, Philippe;
7:2:12:15     Electrically driven octahedral rotations in SrTiO3 and PbTiO3
DOI:10.1103/PhysRevB.87.064104  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Hong, Jiawang;Vanderbilt, David;
7:2:12:16     Electronic structure and biaxial strain in RbHgF3 perovskite and hybrid improper ferroelectricity in (Na,Rb)Hg2F6 and (K,Rb)Hg2F6 superlattices
DOI:10.1103/PhysRevB.90.115121  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Pilania, Ghanshyam;Lookman, Turab;
7:2:12:17     Polarization enhancement in perovskite superlattices by oxygen octahedral tilts
DOI:10.1016/j.commatsci.2014.05.003  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:3  AU: Lu, X. Z.;Gong, X. G.;Xiang, H. J.;
7:2:12:18     Interface Control of Emergent Ferroic Order in Ruddlesden-Popper Srn+1TinO3n+1
DOI:10.1103/PhysRevLett.107.257602  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:17  AU: Birol, Turan;Benedek, Nicole A.;Fennie, Craig J.;
7:2:12:19     First-principles study of structural and vibrational properties of SrZrO3
DOI:10.1103/PhysRevB.85.064112  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Amisi, Safari;Bousquet, Eric;Katcho, Karume;Ghosez, Philippe;
7:2:12:20     Improper ferroelectricity and piezoelectric responses in rhombohedral (A, A') B2O6 perovskite oxides
DOI:10.1103/PhysRevB.89.174110  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Young, Joshua;Rondinelli, James M.;
7:2:12:21     Atomistic theory of hybrid improper ferroelectricity in perovskites
DOI:10.1103/PhysRevB.89.174101  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Zhao, Hong Jian;Iniguez, Jorge;Ren, Wei;Chen, Xiang Ming;Bellaiche, L.;
7:2:12:22     Inversion Symmetry Breaking by Oxygen Octahedral Rotations in the Ruddlesden-Popper NaRTiO4 Family
DOI:10.1103/PhysRevLett.112.187602  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Akamatsu, Hirofumi;Fujita, Koji;Kuge, Toshihiro;Sen Gupta, Arnab;Togo, Atsushi;Lei, Shiming;Xue, Fei;Stone, Greg;Rondinelli, James M.;Chen, Long-Qing;Tanaka, Isao;Gopalan, Venkatraman;Tanaka, Katsuhisa;
7:2:12:23     Hyperferroelectrics: Proper Ferroelectrics with Persistent Polarization
DOI:10.1103/PhysRevLett.112.127601  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:1  AU: Garrity, Kevin F.;Rabe, Karin M.;Vanderbilt, David;
7:2:12:24     Dynamic layer rearrangement during growth of layered oxide films by molecular beam epitaxy
DOI:10.1038/NMAT4039  JN:NATURE MATERIALS  PY:2014
  TC:15  AU: Lee, J. H.;Luo, G.;Tung, I. C.;Chang, S. H.;Luo, Z.;Malshe, M.;Gadre, M.;Bhattacharya, A.;Nakhmanson, S. M.;Eastman, J. A.;Hong, H.;Jellinek, J.;Morgan, D.;Fong, D. D.;Freeland, J. W.;
7:2:12:25     Octahedral tilting and ferroelectricity in RbANb(2)O(7) (A = Bi, Nd) from first principles
DOI:10.1103/PhysRevB.89.144114  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Sim, Hyunsu;Kim, Bog G.;
7:2:12:26     Ferroelasticity in a metal-organic framework perovskite; towards a new class of multiferroics
DOI:10.1016/j.actamat.2013.04.054  JN:ACTA MATERIALIA  PY:2013
  TC:17  AU: Li, Wei;Zhang, Zhiying;Bithell, Erica G.;Batsanov, Andrei S.;Barton, Phillip T.;Saines, Paul J.;Jain, Prashant;Howard, Christopher J.;Carpenter, Michael A.;Cheetham, Anthony K.;
7:2:12:27     The Role of Trilinear Couplings in the Phase Transitions of Aurivillius Compounds
DOI:10.1080/00150191003670325  JN:FERROELECTRICS  PY:2010
  TC:18  AU: Etxebarria, I.;Perez-Mato, J. M.;Boullay, P.;
7:2:12:28     Elastic relaxation behavior, magnetoelastic coupling, and order-disorder processes in multiferroic metal-organic frameworks
DOI:10.1103/PhysRevB.86.214304  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;
7:2:12:29     Symmetry analysis for the Ruddlesden-Popper systems Ca3Mn2O7 and Ca3Ti2O7
DOI:10.1103/PhysRevB.84.064116  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Harris, A. B.;
7:2:12:30     Coupling between octahedral rotations and local polar displacements in WO3/ReO3 superlattices
DOI:10.1103/PhysRevB.89.195304  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Schick, Joseph T.;Jiang, Lai;Saldana-Greco, Diomedes;Rappe, Andrew M.;
7:2:12:31     Ab initio study of the structural phase transitions of the double perovskites Sr2MWO6 (M=Zn, Ca, Mg)
DOI:10.1103/PhysRevB.89.064107  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Petralanda, U.;Etxebarria, I.;
7:2:12:32     RbBiNb2O7: A New Lead-Free High-T-c Ferroelectric
DOI:10.1021/cm3013039  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:11  AU: Li, Bao-Wen;Osada, Minoru;Ozawa, Tadashi C.;Sasaki, Takayoshi;
7:2:12:33     Geometric ferroelectricity in fluoroperovskites
DOI:10.1103/PhysRevB.89.104107  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Garcia-Castro, A. C.;Spaldin, Nicola A.;Romero, A. H.;Bousquet, E.;
7:2:12:34     Strain Accommodation by Facile WO6 Octahedral Distortion and Tilting during WO3 Heteroepitaxy on SrTiO3(001)
DOI:10.1021/am5035686  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:2  AU: Du, Yingge;Gu, Meng;Varga, Tamas;Wang, Chongmin;Bowden, Mark E.;Chambers, Scott A.;
7:2:12:35     Ferromagnetism and Orbital Order in a Topological Ferroelectric
DOI:10.1103/PhysRevLett.109.217202  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:6  AU: Scarrozza, Marco;Filippetti, Alessio;Fiorentini, Vincenzo;
7:2:12:36     First-principles study of the ferroelectric Aurivillius phase Bi2WO6
DOI:10.1103/PhysRevB.86.054107  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Djani, Hania;Bousquet, Eric;Kellou, Abdelhafid;Ghosez, Philippe;
7:2:12:37     Electrically induced decrease of magnetization in Ca3Mn2O7
DOI:10.1063/1.4767139  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Zhu, Wenka;Pi, Li;Huang, Yuanjie;Tan, Shun;Zhang, Yuheng;
7:2:12:38     Short-Range Layered A-Site Ordering in Double Perovskites NaLaBB ' O-6 (B = Mn, Fe; B ' = Nb, Ta)
DOI:10.1021/cm200226u  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:7  AU: Dachraoui, Walid;Yang, Tao;Liu, Chang;King, Graham;Hadermann, Joke;Van Tendeloo, Gustaaf;Llobet, Anna;Greenblatt, Martha;
7:2:12:39     Physical constraint and its consequence for hyperferroelectrics
DOI:10.1063/1.4900480  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Fu, Huaxiang;
7:2:12:40     Landau theory of tilting of oxygen octahedra in perovskites
DOI:10.1103/PhysRevB.85.174107  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Harris, A. B.;
7:2:12:41     Evolution of crystal structures in metallic elements
DOI:10.1103/PhysRevB.87.184104  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Togo, Atsushi;Tanaka, Isao;
7:2:12:42     First principles study of structural, electronic and magnetic properties of Bi doped in hexagonal SrMnO3
DOI:10.1016/j.commatsci.2012.05.055  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:1  AU: Luo, Benhua;Wang, Xueye;Jiao, Peng;
7:2:12:43     The Electronic Structures, Born Effective Charges, and Interatomic Force Constants in BaMO3 (M = Ti, Zr, Hf, Sn): A Comparative First-Principles Study
DOI:10.1111/j.1551-2916.2012.05371.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Xie, L.;Zhu, J.;
7:2:12:44     CRYSTAL ENGINEERING IN TWO DIMENSIONS Surface attraction
DOI:10.1038/nmat2786  JN:NATURE MATERIALS  PY:2010
  TC:14  AU: Green, Mark A.;
7:2:13:1     One-pot self-catalyzed synthesis and properties of multiferroic BiFeO3 single-phase crystallites by sucrose-assisted combustion
DOI:10.1016/j.jallcom.2012.09.010  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Li, Tie;Shen, Jianfeng;Li, Na;Ye, Mingxin;
7:2:13:2     Reaction pathways in the solid state synthesis of multiferroic BiFeO3
DOI:10.1016/j.jeurceramsoc.2011.03.018  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:40  AU: Bernardo, M. S.;Jardiel, T.;Peiteado, M.;Caballero, A. C.;Villegas, M.;
7:2:13:3     Significant enhancement in the visible light photocatalytic properties of BiFeO3-graphene nanohybrids
DOI:10.1039/c2ta00141a  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2013
  TC:32  AU: Li, Zhuoxuan;Shen, Yang;Yang, Cheng;Lei, Yuechuan;Guan, Yuhan;Lin, Yuanhua;Liu, Dabo;Nan, Wen;
7:2:13:4     Photocatalytic properties of BiFeO3 nanoparticles with different sizes
DOI:10.1016/j.matlet.2011.02.080  JN:MATERIALS LETTERS  PY:2011
  TC:13  AU: Xian, T.;Yang, H.;Dai, J. F.;Wei, Z. Q.;Ma, J. Y.;Feng, W. F.;
7:2:13:5     Factors controlling pure-phase magnetic BiFeO3 powders synthesized by solution combustion synthesis
DOI:10.1016/j.jallcom.2011.07.023  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:21  AU: Yang, Jun;Li, Xiaoci;Zhou, Junyi;Tang, Yu;Zhang, Yuanming;Li, Yongwang;
7:2:13:6     Magnetic and optical properties of multiferroic bismuth ferrite nanoparticles by tartaric acid-assisted sol-gel strategy
DOI:10.1016/j.matlet.2009.11.059  JN:MATERIALS LETTERS  PY:2010
  TC:37  AU: Wang, Xiong;Zhang, Yan'ge;Wu, Zhibin;
7:2:13:7     Factors controlling pure-phase multiferroic BiFeO3 powders synthesized by chemical co-precipitation
DOI:10.1016/j.jallcom.2010.09.213  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:37  AU: Ke, Hua;Wang, Wen;Wang, Yuanbin;Xu, Jiahuan;Jia, Dechang;Lu, Zhe;Zhou, Yu;
7:2:13:8     Low-Temperature Synthesis of BiFeO(3) via PVA Sol-Gel Route
DOI:10.1111/j.1551-2916.2010.03945.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:29  AU: Liu, Ting;Xu, Yebin;Zhao, Jingyuan;
7:2:13:9     Synthesis and characterization of multifermic BiFeO3 powders fabricated by hydrothermal method
DOI:10.1016/j.ceramint.2010.01.020  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:32  AU: Han, Seung Ho;Kim, Kyoung Sun;Kim, Ho Gi;Lee, Hyeung-Gyu;Kang, Hyung-Won;Kim, Jeong Seog;Il Cheon, Chae;
7:2:13:10     Enhanced visible-light-response photocatalytic activity of bismuth ferrite nanoparticles
DOI:10.1016/j.jallcom.2011.03.074  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:35  AU: Wang, Xiong;Lin, Ying;Ding, Xifeng;Jiang, Jinguo;
7:2:13:11     Hydrothermal Synthesis and Magnetic Properties of Bismuth Ferrites Nanocrystals with Various Morphology
DOI:10.1111/j.1551-2916.2012.05419.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:14  AU: Wu, Lei;Dong, Chunhui;Chen, Hang;Yao, Jinli;Jiang, Changjun;Xue, Desheng;
7:2:13:12     Microwave Hydrothermal Synthesis, Structural Characterization, and Visible-Light Photocatalytic Activities of Single-Crystalline Bismuth Ferric Nanocrystals
DOI:10.1111/j.1551-2916.2011.04430.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:26  AU: Zhu, Xinhua;Hang, Qiming;Xing, Zhibiao;Yang, Yun;Zhu, Jianmin;Liu, Zhiguo;Ming, Naiben;Zhou, Peng;Song, Ye;Li, Zhaosheng;Yu, Tao;Zou, Zhigang;
7:2:13:13     Room-temperature ferromagnetic/ferroelectric BiFeO3 synthesized by a self-catalyzed fast reaction process
DOI:10.1039/c0jm00729c  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:21  AU: Wu, Jiangtao;Mao, Shaoyu;Ye, Zuo-Guang;Xie, Zhaoxiong;Zheng, Lansun;
7:2:13:14     Synthesis of pure-phase BiFeO3 nanopowder by nitric acid-assisted gel
DOI:10.1016/j.matlet.2014.03.105  JN:MATERIALS LETTERS  PY:2014
  TC:5  AU: Wang, Jiangying;Wei, Yinwei;Zhang, Jingji;Ji, Ludong;Huang, Yuexiang;Chen, Zhi;
7:2:13:15     Tunable bandgap in BiFeO3 nanoparticles: The role of microstrain and oxygen defects
DOI:10.1063/1.4813539  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Mocherla, Pavana S. V.;Karthik, C.;Ubic, R.;Rao, M. S. Ramachandra;Sudakar, C.;
7:2:13:16     Microwave-induced solid-state decomposition of the Bi[Fe(CN)(6)]center dot 5H(2)O precursor: A novel route for the rapid and facile synthesis of pure and single-phase BiFeO3 nanopowder
DOI:10.1016/j.jallcom.2010.05.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:18  AU: Farhadi, Saeid;Rashidi, Nazanin;
7:2:13:17     Synthesis, phase evolution and properties of phase-pure nanocrystalline BiFeO3 prepared by a starch-based combustion method
DOI:10.1016/j.jallcom.2013.12.120  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Koeferstein, Roberto;
7:2:13:18     Hydrothermal Synthesis and Size-Dependent Properties of Multiferroic Bismuth Ferrite Crystallites
DOI:10.1111/j.1551-2916.2010.03953.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Zhang, Haibo;Kajiyoshi, Koji;
7:2:13:19     Direct mechanosynthesis of pure BiFeO3 perovskite nanoparticles: reaction mechanism
DOI:10.1039/c3tc30446a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:12  AU: Perejon, Antonio;Murafa, Nataliya;Sanchez-Jimenez, Pedro E.;Criado, Jose M.;Subrt, Jan;Dianez, Maria J.;Perez-Maqueda, Luis A.;
7:2:13:20     Large-scale growth and shape evolution of bismuth ferrite particles with a hydrothermal method
DOI:10.1016/j.matchemphys.2011.01.027  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:25  AU: Chen, Xian-Zhi;Qiu, Zhong-Cheng;Zhou, Jian-Ping;Zhu, Gangqiang;Bian, Xiao-Bing;Liu, Peng;
7:2:13:21     High-Temperature and High-Pressure Aqueous Solution Formation, Growth, Crystal Structure, and Magnetic Properties of BiFeO3 Nanocrystals
DOI:10.1021/cm102575w  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:23  AU: Mi, Jian-Li;Jensen, Thomas N.;Christensen, Mogens;Tyrsted, Christoffer;Jorgensen, Jens E.;Iversen, Bo B.;
7:2:13:22     Electrical Properties of Stoichiometric BiFeO3 Prepared by Mechanosynthesis with Either Conventional or Spark Plasma Sintering
DOI:10.1111/jace.12186  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:11  AU: Perejon, Antonio;Maso, Nahum;West, Anthony R.;Sanchez-Jimenez, Pedro E.;Poyato, Rosalia;Criado, Jose M.;Perez-Maqueda, Luis A.;
7:2:13:23     Photocatalytic and magnetic behaviors of BiFeO3 thin films deposited on different substrates
DOI:10.1063/1.4901066  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Xu, Hao-Min;Wang, Huan-Chun;Shen, Yang;Lin, Yuan-Hua;Nan, Ce-Wen;
7:2:13:24     Fabrication, Characterization, Properties, and Applications of Low-Dimensional BiFeO3 Nanostructures
DOI:10.1155/2014/471485  JN:JOURNAL OF NANOMATERIALS  PY:2014
  TC:0  AU: Wu, Heng;Zhou, Jun;Liang, Lizhi;Li, Lei;Zhu, Xinhua;
7:2:13:25     Microwave hydrothermal synthesis of perovskite BiFeO3 nanoparticles: An insight into the phase purity during the microwave heating process
DOI:10.1016/j.matchemphys.2012.04.053  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:9  AU: Wang, Zhi;Zhu, Junyu;Xu, Wenfei;Sui, Jin;Peng, Hui;Tang, Xiaodong;
7:2:13:26     Structure and phase transition of BiFeO3 cubic micro-particles prepared by hydrothermal method
DOI:10.1016/j.materresbull.2012.06.050  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:5  AU: Zhou, Jian-Ping;Yang, Ruo-Lin;Xiao, Rui-Juan;Chen, Xiao-Ming;Deng, Chao-Yong;
7:2:13:27     Synthesis of BiFeO3 nanoparticles by a low-heating temperature solid-state precursor method
DOI:10.1016/j.materresbull.2012.10.038  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:13  AU: Wang, Lei;Xu, Jin-Bao;Gao, Bo;Chang, Ai-Min;Chen, Jing;Bian, Liang;Song, Chun-Yan;
7:2:13:28     Preparation of room temperature ferromagnetic BiFeO3 and its application as an highly efficient magnetic separable adsorbent for removal of Rhodamine B from aqueous solution
DOI:10.1016/j.jallcom.2012.03.104  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:14  AU: Zhang, Jun;Gondal, M. A.;Wei, Wei;Zhang, Taona;Xu, Qingyu;Shen, Kai;
7:2:13:29     Controllable Microwave Hydrothermal Synthesis of Bismuth Ferrites and Photocatalytic Characterization
DOI:10.1111/j.1551-2916.2011.04775.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:17  AU: Tan, Guo-Qiang;Zheng, Yu-Qin;Miao, Hong-Yan;Xia, Ao;Ren, Hui-Jun;
7:2:13:30     Polyanion modulated evolution of perovskite BiFeO3 microspheres to microcubes by a microwave assisted hydrothermal method
DOI:10.1557/jmr.2013.130  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:2  AU: Wang, Zhi;Xu, Wenfei;Peng, Hui;Tang, Xiaodong;
7:2:13:31     A comparative study of the optical, magnetic and electrocatalytic properties of nano BiFeO3 with different morphologies
DOI:10.1016/j.matlet.2011.12.091  JN:MATERIALS LETTERS  PY:2012
  TC:6  AU: Zou, Jing;Jiang, Jizhou;Zhang, Yuanxiao;Ma, Jinai;Wan, Qijin;
7:2:13:32     Influence of precursor Bi3+/Fe3+ ion concentration on hydrothermal synthesis of BiFeO3 crystallites
DOI:10.1016/j.ceramint.2013.08.134  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Di, L. J.;Yang, H.;Xian, T.;Li, R. S.;Feng, Y. C.;Feng, W. J.;
7:2:13:33     A Facile Route to the Synthesis of BiFeO3 at Low Temperature
DOI:10.1111/j.1551-2916.2011.04536.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:14  AU: Liu, Ting;Xu, Yebin;Feng, Shangshen;Zhao, Jingyuan;
7:2:13:34     Ultrafast Microwave Hydrothermal Synthesis of BiFeO3 Nanoplates
DOI:10.1111/jace.12473  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Li, Shun;Nechache, Riad;Davalos, Ivan Alejandro Velasco;Goupil, Gregory;Nikolova, Liliya;Nicklaus, Mischa;Laverdiere, Jonathan;Ruediger, Andreas;Rosei, Federico;
7:2:13:35     Hydrothermally grown bismuth ferrites: controllable phases and morphologies in a mixed KOH/NaOH mineralizer
DOI:10.1039/c2jm33859a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:13  AU: Tsai, Cho-Jen;Yang, Ching-Yu;Liao, Ying-Chan;Chueh, Yu-Lun;
7:2:13:36     Self-assembly growth of BiFeO3 powders prepared by microwave-hydrothermal method
DOI:10.1016/j.matlet.2011.01.026  JN:MATERIALS LETTERS  PY:2011
  TC:9  AU: Zheng, Yu-Qin;Tan, Guo-Qiang;Miao, Hong-Yan;Xia, Ao;Ren, Hui-Jun;
7:2:13:37     Mechanochemically assisted synthesis of nanocrystalline BiFeO3
DOI:10.1016/j.matchemphys.2013.02.058  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:3  AU: Cristobal, A. A.;Botta, P. M.;
7:2:13:38     Synthesis of pure phase BiFeO3 powders by direct thermal decomposition of metal nitrates
DOI:10.1016/j.ceramint.2012.10.066  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Wang, Lei;Xu, Jin-Bao;Gao, Bo;Bian, Liang;Chen, Xue-Ying;
7:2:13:39     Study on visible light response and magnetism of bismuth ferrites synthesized by a low temperature hydrothermal method
DOI:10.1016/j.ceramint.2012.10.212  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Sun, Yuxia;Xiong, Xiangyu;Xia, Zhao;Liu, Hongri;Zhou, Yong;Luo, Man;Wang, Chengyan;
7:2:13:40     Optimization of BFO microwave-hydrothermal synthesis: Influence of process parameters
DOI:10.1016/j.jallcom.2013.01.039  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:9  AU: Ponzoni, Chiara;Rosa, Roberto;Cannio, Maria;Buscaglia, Vincenzo;Finocchio, Elisabetta;Nanni, Paolo;Leonelli, Cristina;
7:2:13:41     Synthesis and Photocatalytic Behaviors of High Surface Area BiFeO3 Thin Films
DOI:10.1111/j.1551-2916.2011.04653.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Xu, Xiang;Lin, Yuan-Hua;Li, Pai;Shu, Li;Nan, Ce-Wen;
7:2:13:42     Bandgap engineering and enhanced interface coupling of graphene-BiFeO3 nanocomposites as efficient photocatalysts under visible light
DOI:10.1039/c3ta14269h  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:10  AU: Li, Zhuoxuan;Shen, Yang;Guan, Yuhan;Hu, Yuhan;Lin, Yuanhua;Nan, Ce-Wen;
7:2:13:43     Effects of magnetic annealing on structure and multiferroic properties of pure and dysprosium substituted BiFeO3
DOI:10.1016/j.jmmm.2012.02.030  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Zhang, Shuxia;Yao, Yingbang;Chen, Yao;Wang, Dongliang;Zhang, Xianping;Awaji, Satoshi;Wantanabe, Kazuo;Ma, Yanwei;
7:2:13:44     Phase evolution of bismuth ferrites in the process of hydrothermal reaction
DOI:10.1016/j.matchemphys.2012.02.042  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:8  AU: Cai, Dengrong;Li, Jianmin;Tong, Tong;Jin, Dengren;Yu, Shengwen;Cheng, Jinrong;
7:2:13:45     Microwave-hydrothermal synthesis of perovskite bismuth ferrite nanoparticles
DOI:10.1016/j.materresbull.2011.08.010  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:10  AU: Biasotto, G.;Simoes, A. Z.;Foschini, C. R.;Zaghete, M. A.;Varela, J. A.;Longo, E.;
7:2:13:46     Photocatalytic performances of BiFeO3 particles with the average size in nanometer, submicrometer, and micrometer
DOI:10.1016/j.materresbull.2013.11.039  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:5  AU: Hao, Chunxue;Wen, Fusheng;Xiang, Jianyong;Hou, Hang;Lv, Weiming;Lv, Yifei;Hu, Wentao;Liu, Zhongyuan;
7:2:13:47     Ferroelectric and magnetic properties in high-pressure synthesized BiFeO3 compound
DOI:10.1016/j.jallcom.2011.04.046  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Zhai, L.;Shi, Y. G.;Gao, J. L.;Tang, S. L.;Du, Y. W.;
7:2:13:48     Effect of ion doping in different sites on the morphology and photocatalytic activity of BiFeO3 microcrystals
DOI:10.1016/j.jallcom.2013.03.176  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Pei, Yan-Ling;Zhang, Chaolei;
7:2:13:49     A facile mixed-solvothermal route to gamma-Bi2MoO6 nanoflakes and their visible-light-responsive photocatalytic activity
DOI:10.1016/j.materresbull.2013.05.104  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:9  AU: Wang, Xiong;Gu, Fei;Li, Li;Fang, Guoli;Wang, Xiang;
7:2:13:50     Synthesis of BiFeo(3) nanoparticles for the visible-light induced photocatalytic property
DOI:10.1016/j.materresbull.2014.06.022  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Gao, Tong;Chen, Zhi;Zhu, Yuxiang;Niu, Feng;Huang, Qiaoli;Qin, Laishun;Sun, Xingguo;Huang, Yuexiang;
7:2:13:51     Synthesis of powders and thin films of bismuth ferrite from solution: a magneto-electric study
DOI:10.1007/s00339-014-8523-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Diaz-Castanon, S.;Garcia-Zaldivar, O.;Faloh-Gandarilla, J.;Watts, B. E.;Calderon-Pinar, F.;Hernandez-Landaverde, M. A.;Espinoza-Beltran, F. J.;
7:2:13:52     Dependence of dielectric behavior in BiFeO3 ceramics on intrinsic defects
DOI:10.1016/j.jallcom.2012.06.110  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Ke, Hua;Wang, Wen;Wang, Yuanbin;Zhang, Hongjun;Jia, Dechang;Zhou, Yu;Lu, Xuekun;Withers, Philip;
7:2:13:53     Bi2Fe4O9 submicron-rods synthesized by a low-heating temperature solid state precursor method
DOI:10.1016/j.jallcom.2013.02.030  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Wang, Lei;Li, Jin;Xu, Jin-Bao;Chang, Ai-Min;Bian, Liang;Gao, Bo;Liu, Kai-Tong;
7:2:13:54     Low Temperature Synthesis, Structural, Optical and Magnetic Properties of Bismuth Ferrite Nanoparticles
DOI:10.1111/j.1551-2916.2012.05411.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Srivastav, Simant Kumar;Gajbhiye, Namdeo S.;
7:2:13:55     BiFeO3-(Na0.5Bi0.5)TiO3 butterfly wing scales: Synthesis, visible-light photocatalytic and magnetic properties
DOI:10.1016/j.jeurceramsoc.2012.07.008  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Liu, Hongyan;Guo, Yiping;Guo, Bing;Dong, Wen;Zhang, Di;
7:2:13:56     Ferromagnetism in sub-micron scale BiFeO3
DOI:10.1016/j.matlet.2011.07.028  JN:MATERIALS LETTERS  PY:2011
  TC:3  AU: Zhang, Shuxia;Wang, Lei;Gao, Zhaoshun;Zhang, Xiong;Wang, Dongliang;Ma, Yanwei;
7:2:13:57     Dielectric and magnetic properties of BiFeO3 ceramics prepared by hydrothermal synthesis
DOI:10.1016/j.ceramint.2011.05.019  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Kim, A. Y.;Han, S. H.;Kang, H-W.;Lee, H-G.;Kim, J. S.;Cheon, C. I.;
7:2:13:58     Synthesis of Nano-BiFeO3 by Low-heating Temperature Solid State Precursor Method: Using Different Types of Alkali
DOI:10.1080/10584587.2014.906888  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:1  AU: Li, Jin;Wang, Lei;Xu, Jin-Bao;Bian, Liang;Chang, Ai-Min;Zhao, Peng-Jun;Zhang, Jia-Qi;Xiong, Xin-Qian;Xu, Fang-Long;
7:2:13:59     Effects of NiFe2O4 on magnetoelectric coupling effect of BiFeO3 thin films
DOI:10.1016/j.jmmm.2013.08.049  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:7  AU: Gu, Jianjun;Yang, Shumin;Yang, Wei;Qi, Yunkai;Zhao, Guoliang;Sun, Huiyuan;
7:2:13:60     Multiferroic BiFeO3 glass-ceramics: Phase formation and physical property
DOI:10.1063/1.4881138  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Takahashi, Yoshihiro;Meguro, Kousuke;Naganuma, Hiroshi;Terakado, Nobuaki;Fujiwara, Takumi;
7:2:13:61     Synthesis of La2NiO4 via a PVA-based route
DOI:10.1016/j.ceramint.2011.05.137  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:1  AU: Liu, Ting;Xu, Yebin;Li, Yang;Wang, Zhaohui;Zhao, Jingyuan;
7:2:13:62     Structural, optical and electromagnetic properties of Bi1-xHoxFeO3 multiferroic materials
DOI:10.1016/j.jallcom.2010.12.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Nguyen Van Minh;Nguyen Gia Quan;
7:2:14:1     Structural and energetic properties of domains in PbTiO3/SrTiO3 superlattices from first principles
DOI:10.1103/PhysRevB.85.184105  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Aguado-Puente, Pablo;Junquera, Javier;
7:2:14:2     X-Ray Diffraction Studies of 180 degrees Ferroelectric Domains in PbTiO3/SrTiO3 Superlattices under an Applied Electric Field
DOI:10.1103/PhysRevLett.104.187601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:32  AU: Zubko, P.;Stucki, N.;Lichtensteiger, C.;Triscone, J-M.;
7:2:14:3     New developments in artificially layered ferroelectric oxide superlattices
DOI:10.1557/mrs.2013.263  JN:MRS BULLETIN  PY:2013
  TC:1  AU: Dawber, Matthew;Bousquet, Eric;
7:2:14:4     Interplay of Couplings between Antiferrodistortive, Ferroelectric, and Strain Degrees of Freedom in Monodomain PbTiO3/SrTiO3 Superlattices
DOI:10.1103/PhysRevLett.107.217601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:20  AU: Aguado-Puente, Pablo;Garcia-Fernandez, Pablo;Junquera, Javier;
7:2:14:5     Electrostatic Coupling and Local Structural Distortions at Interfaces in Ferroelectric/Paraelectric Superlattices
DOI:10.1021/nl3003717  JN:NANO LETTERS  PY:2012
  TC:19  AU: Zubko, P.;Jecklin, N.;Torres-Pardo, A.;Aguado-Puente, P.;Gloter, A.;Lichtensteiger, C.;Junquera, J.;Stephan, O.;Triscone, J. -M.;
7:2:14:6     Interfacial enhancement of ferroelectricity in CaTiO3/BaTiO3 superlattices
DOI:10.1103/PhysRevB.83.020104  JN:PHYSICAL REVIEW B  PY:2011
  TC:21  AU: Wu, Xifan;Rabe, Karin M.;Vanderbilt, David;
7:2:14:7     Ferroelectric PbTiO3/SrRuO3 Superlattices with Broken Inversion Symmetry
DOI:10.1103/PhysRevLett.109.067601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:12  AU: Callori, S. J.;Gabel, J.;Su, D.;Sinsheimer, J.;Fernandez-Serra, M. V.;Dawber, M.;
7:2:14:8     Spectroscopic mapping of local structural distortions in ferroelectric PbTiO3/SrTiO3 superlattices at the unit-cell scale
DOI:10.1103/PhysRevB.84.220102  JN:PHYSICAL REVIEW B  PY:2011
  TC:13  AU: Torres-Pardo, Almudena;Gloter, Alexandre;Zubko, Pavlo;Jecklin, Noemie;Lichtensteiger, Celine;Colliex, Christian;Triscone, Jean-Marc;Stephan, Odile;
7:2:14:9     Nanosecond Dynamics of Ferroelectric/Dielectric Superlattices
DOI:10.1103/PhysRevLett.107.055501  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:17  AU: Jo, Ji Young;Chen, Pice;Sichel, Rebecca J.;Callori, Sara J.;Sinsheimer, John;Dufresne, Eric M.;Dawber, Matthew;Evans, Paul G.;
7:2:14:10     Strong dependence of dielectric properties on electrical boundary conditions and interfaces in ferroelectric superlattices
DOI:10.1063/1.4862408  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Misirlioglu, I. B.;Kesim, M. T.;Alpay, S. P.;
7:2:14:11     Various evidences for the unusual polarization behaviors in epitaxially strained (111) BaTiO3
DOI:10.1063/1.4864218  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Raeliarijaona, Aldo;Fu, Huaxiang;
7:2:14:12     Engineering Polarization Rotation in a Ferroelectric Superlattice
DOI:10.1103/PhysRevLett.109.167601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:11  AU: Sinsheimer, J.;Callori, S. J.;Bein, B.;Benkara, Y.;Daley, J.;Coraor, J.;Su, D.;Stephens, P. W.;Dawber, M.;
7:2:14:13     Modeling functional piezoelectricity in perovskite superlattices with competing instabilities
DOI:10.1103/PhysRevB.85.054102  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Swartz, Charles W.;Wu, Xifan;
7:2:14:14     Quantification of Internal Electric Fields and Local Polarization in Ferroelectric Superlattices
DOI:10.1021/nn102884s  JN:ACS NANO  PY:2011
  TC:12  AU: Kathan-Galipeau, Kendra;Wu, Pingping;Li, Yulan;Chen, Long-Qing;Soukiassian, Arsen;Xi, Xiaoxing;Schlom, Darrell G.;Bonnell, Dawn A.;
7:2:14:15     Phase transitions in ferroelectric-paraelectric superlattices
DOI:10.1063/1.3662197  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Levanyuk, A. P.;Misirlioglu, I. B.;
7:2:14:16     Phase transitions in ferroelectric-paraelectric superlattices: Stability of single domain state
DOI:10.1063/1.4829149  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Levanyuk, A. P.;Misirlioglu, I. B.;
7:2:14:17     Direct determination of the effect of strain on domain morphology in ferroelectric superlattices with scanning probe microscopy
DOI:10.1063/1.4746081  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Kathan-Galipeau, K.;Wu, P. P.;Li, Y. L.;Chen, L. Q.;Soukiassian, A.;Zhu, Y.;Muller, D. A.;Xi, X. X.;Schlom, D. G.;Bonnell, D. A.;
7:2:14:18     Field-Dependent Domain Distortion and Interlayer Polarization Distribution in PbTiO3/SrTiO3 Superlattices
DOI:10.1103/PhysRevLett.110.047601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Chen, Pice;Cosgriff, Margaret P.;Zhang, Qingteng;Callori, Sara J.;Adams, Bernhard W.;Dufresne, Eric M.;Dawber, Matthew;Evans, Paul G.;
7:2:14:19     Enhancing permittivity of ferroelectric superlattices via composition tuning
DOI:10.1103/PhysRevB.81.144118  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Pertsev, N. A.;Janolin, P. -E.;Kiat, J. -M.;Uesu, Y.;
7:2:14:20     Ab initio design of charge-mismatched ferroelectric superlattices
DOI:10.1103/PhysRevB.90.020101  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Cazorla, Claudio;Stengel, Massimiliano;
7:2:14:21     Layer thickness and period as design parameters to tailor pyroelectric properties in ferroelectric superlattices
DOI:10.1063/1.4900940  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Misirlioglu, I. B.;Kesim, M. T.;Alpay, S. P.;
7:2:14:22     Ferroelectric Domains in PbTiO3/SrTiO3 Superlattices
DOI:10.1080/00150193.2012.678159  JN:FERROELECTRICS  PY:2012
  TC:5  AU: Zubko, P.;Jecklin, N.;Stucki, N.;Lichtensteiger, C.;Rispens, G.;Triscone, J-M.;
7:2:14:23     Piezoelectricity in the Dielectric Component of Nanoscale Dielectric-Ferroelectric Superlattices
DOI:10.1103/PhysRevLett.104.207601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:13  AU: Jo, Ji Young;Sichel, Rebecca J.;Lee, Ho Nyung;Nakhmanson, Serge M.;Dufresne, Eric M.;Evans, Paul G.;
7:2:14:24     Mapping the energy surface of PbTiO3 in multidimensional electric-displacement space
DOI:10.1103/PhysRevB.84.115107  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Hong, Jiawang;Vanderbilt, David;
7:2:14:25     Enhanced piezoelectric response in the artificial ferroelectric polymer multilayers
DOI:10.1063/1.4903481  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhao, X. L.;Wang, J. L.;Tian, B. B.;Liu, B. L.;Wang, X. D.;Sun, S.;Zou, Y. H.;Lin, T.;Sun, J. L.;Meng, X. J.;Chu, J. H.;
7:2:14:26     Upshift of Phase Transition Temperature in Nanostructured PbTiO3 Thick Film for High Temperature Applications
DOI:10.1021/am5000307  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:2  AU: Ryu, Jungho;Han, Guifang;Song, Tae Kwon;Welsh, Aaron;Trolier-McKinstry, Susan;Choi, Hongsoo;Lee, Jong-Pil;Kim, Jong-Woo;Yoon, Woon-Ha;Choi, Jong-Jin;Park, Dong-Soo;Ahn, Cheol-Woo;Priya, Shashank;Choi, Si-Young;Jeong, Dae-Yong;
7:2:14:27     Influence of interface intermixing and periodicity on internal electric field and polarization in ferroelectric superlattices
DOI:10.1016/j.ceramint.2012.10.082  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Chew, Khian-Hooi;Lim, Kok-Geng;Ong, Lye-Hock;Iwata, Makoto;
7:2:14:28     A dipole lattice model of switching characteristics in ferroelectric superlattices
DOI:10.1063/1.4846797  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Chew, K. -H.;Zhou, Y.;Ong, L. -H.;Iwata, M.;
7:2:14:29     Tuning of the Depolarization Field and Nanodomain Structure in Ferroelectric Thin Films
DOI:10.1021/nl404734z  JN:NANO LETTERS  PY:2014
  TC:4  AU: Lichtensteiger, Celine;Fernandez-Pena, Stephanie;Weymann, Christian;Zubko, Pavlo;Triscone, Jean-Marc;
7:2:14:30     Component-specific electromechanical response in a ferroelectric/dielectric superlattice
DOI:10.1103/PhysRevB.82.174116  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Jo, Ji Young;Sichel, Rebecca J.;Dufresne, Eric M.;Lee, Ho Nyung;Nakhmanson, Serge M.;Evans, Paul G.;
7:2:14:31     Thickness scaling of ferroelastic domains in PbTiO3 films on DyScO3
DOI:10.1063/1.4823536  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Nesterov, O.;Matzen, S.;Magen, C.;Vlooswijk, A. H. G.;Catalan, G.;Noheda, B.;
7:2:14:32     Atomic scale investigation of a PbTiO3/SrRuO3/DyScO3 heterostructure
DOI:10.1063/1.4809597  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Egoavil, R.;Tan, H.;Verbeeck, J.;Bals, S.;Smith, B.;Kuiper, B.;Rijnders, G.;Koster, G.;Van Tendeloo, G.;
7:2:14:33     Electron energy loss spectroscopy investigation of Pb and Ti hybridization with O at the PbTiO3/SrTiO3 interface
DOI:10.1063/1.3544416  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Eberg, E.;van Helvoort, A. T. J.;Takahashi, R.;Gass, M.;Mendis, B.;Bleloch, A.;Holmestad, R.;Tybell, T.;
7:2:14:34     Nano-domain engineering in ultrashort-period ferroelectric superlattices
DOI:10.1063/1.4722791  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Choi, Taekjib;Park, Bae Ho;Shin, Hyunjung;Lee, Jaichan;
7:2:14:35     Minimum tetragonality in PbTiO3/BaTiO3 ferroelectric superlattices
DOI:10.1063/1.4824922  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Hong, Liang;Li, Yulan;Wu, Pingping;Chen, Long-Qing;
7:2:14:36     Tuning the Built-in Electric Field in Ferroelectric Pb(Zr0.2Ti0.8)O-3 Films for Long-Term Stability of Single-Digit Nanometer Inverted Domains
DOI:10.1021/nl302911k  JN:NANO LETTERS  PY:2012
  TC:4  AU: Tayebi, Noureddine;Kim, Sunkook;Chen, Robert J.;Quan Tran;Franklin, Nathan;Nishi, Yoshio;Ma, Qing;Rao, Valluri;
7:2:14:37     Effects of anisotropic elasticity in the problem of domain formation and stability of monodomain state in ferroelectric films
DOI:10.1103/PhysRevB.84.045401  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Bratkovsky, A. M.;Levanyuk, A. P.;
7:2:14:38     Enhanced dielectric and ferroelectric properties in the artificial polymer multilayers
DOI:10.1063/1.4866441  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zhao, X. L.;Wang, J. L.;Liu, B. L.;Tian, B. B.;Zou, Y. H.;Sun, S.;Sun, J. L.;Meng, X. J.;Chu, J. H.;
7:2:14:39     Interfacial nanolayers and permittivity of ferroelectric superlattices
DOI:10.1063/1.3596600  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Pertsev, N. A.;Tyunina, M.;
7:2:14:40     Kinetics of nanodomain growth in ferroelectric artificial superlattices
DOI:10.1016/j.scriptamat.2013.05.037  JN:SCRIPTA MATERIALIA  PY:2013
  TC:0  AU: Choi, Taekjib;Park, Bae Ho;Shin, Hyunjung;Lee, Jaichan;
7:2:14:41     Modulated internal electric field, dielectric susceptibility and polarization in ferroelectric superlattices
DOI:10.1016/j.ceramint.2012.10.083  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Lim, Kok-Geng;Chew, Khian-Hooi;Ong, Lye-Hock;Iwata, Makoto;
7:2:14:42     Temperature Stable Dielectric Behavior of Sol-Gel Derived Compositionally Graded SrTiO3/Na0.5Bi0.5TiO3/SrTiO3 Thin Films
DOI:10.1111/jace.12519  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Setinc, Tina;Spreitzer, Matjaz;Kunej, Spela;Kovac, Janez;Suvorov, Danilo;
7:2:14:43     Frequency Dependence of the Dielectric Permittivity in Ferroelectric Thin Films with 180 degrees Domain Structure
DOI:10.1080/00150193.2013.790757  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Pakhomov, Alexey;Luk'yanchuk, Igor;Sidorkin, Alexander;
7:2:14:44     Strain effect in the problem of critical thickness for ferroelectric memory
DOI:10.1080/14786430903250801  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:3  AU: Bratkovsky, A. M.;Levanyuk, A. P.;
7:2:15:1     Magnetic Field-Induced Ferroelectric Switching in Multiferroic Aurivillius Phase Thin Films at Room Temperature
DOI:10.1111/jace.12467  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:31  AU: Keeney, Lynette;Maity, Tuhin;Schmidt, Michael;Amann, Andreas;Deepak, Nitin;Petkov, Nikolay;Roy, Saibal;Pemble, Martyn E.;Whatmore, Roger W.;
7:2:15:2     Processing optimization and sintering time dependent magnetic and optical behaviors of Aurivillius Bi5Ti3FeO15 ceramics
DOI:10.1063/1.4775800  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Chen, Guang;Bai, Wei;Sun, Lin;Wu, Jing;Ren, Qing;Xu, Wenfei;Yang, Jing;Meng, Xiangjian;Tang, Xiaodong;Duan, Chun-Gang;Chu, Junhao;
7:2:15:3     Ferroelectric transition of Aurivillius compounds Bi5Ti3FeO15 and Bi6Ti3Fe2O18
DOI:10.1063/1.3447372  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:27  AU: Li, J. -B.;Huang, Y. P.;Rao, G. H.;Liu, G. Y.;Luo, J.;Chen, J. R.;Liang, J. K.;
7:2:15:4     The Cr-substitution concentration dependence of the structural, electric and magnetic behaviors for Aurivillius Bi5Ti3FeO15 multiferroic ceramics
DOI:10.1063/1.4849055  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Liu, Jia;Bai, Wei;Yang, Jing;Xu, Wenfei;Zhang, Yuanyuan;Lin, Tie;Meng, Xiangjian;Duan, Chun-Gang;Tang, Xiaodong;Chu, Junhao;
7:2:15:5     Cryogenic temperature relaxor-like dielectric responses and magnetodielectric coupling in Aurivillius Bi5Ti3FeO15 multiferroic thin films
DOI:10.1063/1.4893710  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Bai, Wei;Yin, Wenhao;Yang, Jing;Tang, Kai;Zhang, Yuanyuan;Lin, Tie;Meng, Xiangjian;Duan, Chun-Gang;Tang, Xiaodong;Chu, Junhao;
7:2:15:6     Electrical, magnetic, and optical properties in multiferroic Bi5Ti3FeO15 thin films prepared by a chemical solution deposition route
DOI:10.1063/1.3553879  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:23  AU: Bai, W.;Gao, Y. Q.;Zhu, J. Y.;Meng, X. J.;Lin, T.;Yang, J.;Zhu, Z. Q.;Chu, J. H.;
7:2:15:7     Multiferroic properties of Aurivillius phase Bi6Fe2-xCoxTi3O18 thin films prepared by a chemical solution deposition route
DOI:10.1063/1.4752748  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Liu, Z.;Yang, J.;Tang, X. W.;Yin, L. H.;Zhu, X. B.;Dai, J. M.;Sun, Y. P.;
7:2:15:8     Dielectric responses and scaling behaviors in Aurivillius Bi6Ti3Fe2O18 multiferroic thin films
DOI:10.1063/1.3688033  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Bai, W.;Chen, G.;Zhu, J. Y.;Yang, J.;Lin, T.;Meng, X. J.;Tang, X. D.;Duan, C. G.;Chu, J. H.;
7:2:15:9     Piezoresponse force microscopy investigations of Aurivillius phase thin films
DOI:10.1063/1.3474959  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:17  AU: Keeney, Lynette;Zhang, Panfeng F.;Groh, Claudia;Pemble, Martyn E.;Whatmore, Roger W.;
7:2:15:10     Structural, magnetic, and EPR studies of the Aurivillius phase Bi6Fe2Ti3O18 and Bi6FeCrTi3O18
DOI:10.1103/PhysRevB.86.104410  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Yang, J.;Tong, W.;Liu, Z.;Zhu, X. B.;Dai, J. M.;Song, W. H.;Yang, Z. R.;Sun, Y. P.;
7:2:15:11     Magnetic and dielectric properties of Aurivillius phase Bi6Fe2Ti3O18 and the doped compounds
DOI:10.1063/1.4732526  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Yang, J.;Yin, L. H.;Liu, Z.;Zhu, X. B.;Song, W. H.;Dai, J. M.;Yang, Z. R.;Sun, Y. P.;
7:2:15:12     Effects of La- and V-doping on structural, electrical and multiferroic properties of Bi6Fe2Ti3O18 thin films
DOI:10.1016/j.ceramint.2014.03.049  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Raghavan, Chinnambedu Murugesan;Kim, Jin Won;Kim, Jong-Woo;Kim, Sang Su;
7:2:15:13     Ferroelectric and ferromagnetic properties of Bi7-xLaxFe1.5Co1.5Ti3O21 ceramics prepared by the hot-press method
DOI:10.1016/j.jallcom.2014.02.122  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Lei, Zhiwei;Huang, Yan;Liu, Min;Ge, Wen;Ling, Yihan;Peng, Ranran;Mao, Xiangyu;Chen, Xiaobing;Lu, Yalin;
7:2:15:14     Magnetic, dielectric, and magneto-dielectric properties of rare-earth-substituted Aurivillius phase Bi6Fe1.4Co0.6Ti3O18
DOI:10.1063/1.4898318  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zuo, X. Z.;Yang, J.;Song, D. P.;Yuan, B.;Tang, X. W.;Zhang, K. J.;Zhu, X. B.;Song, W. H.;Dai, J. M.;Sun, Y. P.;
7:2:15:15     Thickness Dependence of Dielectric, Leakage, and Ferroelectric Properties of Bi6Fe2Ti3O18 Thin Films Derived by Chemical Solution Deposition
DOI:10.1111/jace.13200  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Song, Dongpo;Tang, Xianwu;Yuan, Bin;Zuo, Xuzhong;Yang, Jie;Chen, Li;Song, Wenhai;Zhu, Xuebin;Sun, Yuping;
7:2:15:16     Study of multiferroic properties in Bi5Fe0.5Co0.5Ti3O15 thin films
DOI:10.1063/1.4730892  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:18  AU: Sun, Hui;Lu, Xiaomei;Xu, Tingting;Su, Jie;Jin, Yaming;Ju, Changcheng;Huang, Fengzhen;Zhu, Jinsong;
7:2:15:17     Effects of annealing temperature on the structures, ferroelectric and magnetic properties of Aurivillius Bi5Ti3FeO15 polycrystalline films
DOI:10.1016/j.jmmm.2012.02.113  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:10  AU: Bai, W.;Zhu, J. Y.;Wang, J. L.;Lin, T.;Yang, J.;Meng, X. J.;Tang, X. D.;Zhu, Z. Q.;Chu, J. H.;
7:2:15:18     The structural and piezoresponse properties of c-axis-oriented Aurivillius phase Bi5Ti3FeO15 thin films deposited by atomic vapor deposition
DOI:10.1063/1.4752007  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Zhang, P. F.;Deepak, N.;Keeney, L.;Pemble, M. E.;Whatmore, R. W.;
7:2:15:19     Ferromagnetic, ferroelectric properties, and magneto-dielectric effect of Bi4.25La0.75Fe0.5Co0.5Ti3O15 ceramics
DOI:10.1063/1.4793305  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:15  AU: Mao, Xiangyu;Sun, Hui;Wang, Wei;Chen, Xiaobing;Lu, Yalin;
7:2:15:20     Room temperature electromechanical and magnetic investigations of ferroelectric Aurivillius phase Bi5Ti3(FexMn1-x)O-15 (x=1 and 0.7) chemical solution deposited thin films
DOI:10.1063/1.4734983  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:15  AU: Keeney, Lynette;Groh, Claudia;Kulkarni, Santosh;Roy, Saibal;Pemble, Martyn E.;Whatmore, Roger W.;
7:2:15:21     Spin-phonon interactions of multiferroic Bi4Ti3O12-BiFeO3 ceramics: Low-temperature Raman scattering and infrared reflectance spectra investigations
DOI:10.1063/1.4870054  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Jiang, P. P.;Zhang, X. L.;Chang, P.;Hu, Z. G.;Bai, W.;Li, Y. W.;Chu, J. H.;
7:2:15:22     Investigations on electrical, magnetic and optical behaviors of five-layered Aurivillius Bi6Ti3Fe2O18 polycrystalline films
DOI:10.1016/j.tsf.2012.10.058  JN:THIN SOLID FILMS  PY:2012
  TC:7  AU: Bai, W.;Xu, W. F.;Wu, J.;Zhu, J. Y.;Chen, G.;Yang, J.;Lin, T.;Meng, X. J.;Tang, X. D.;Chu, J. H.;
7:2:15:23     Band gap tuning in ferroelectric Bi4Ti3O12 by alloying with LaTMO3 (TM = Ti, V, Cr, Mn, Co, Ni, and Al)
DOI:10.1063/1.3697645  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Choi, Woo Seok;Lee, Ho Nyung;
7:2:15:24     Room temperature ferroelectric and magnetic investigations and detailed phase analysis of Aurivillius phase Bi5Ti3Fe0.7Co0.3O15 thin films
DOI:10.1063/1.4745936  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:15  AU: Keeney, Lynette;Kulkarni, Santosh;Deepak, Nitin;Schmidt, Michael;Petkov, Nikolay;Zhang, Panfeng F.;Cavill, Stuart;Roy, Saibal;Pemble, Martyn E.;Whatmore, Roger W.;
7:2:15:25     Phase transformation in multiferroic Bi5Ti3FeO15 ceramics by temperature-dependent ellipsometric and Raman spectra: An interband electronic transition evidence
DOI:10.1063/1.4866421  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Jiang, P. P.;Duan, Z. H.;Xu, L. P.;Zhang, X. L.;Li, Y. W.;Hu, Z. G.;Chu, J. H.;
7:2:15:26     Structural, magnetic and dielectric properties of Bi5-xLaxTi3Co0.5Fe0.5O15 ceramics
DOI:10.1016/j.mseb.2011.06.016  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:14  AU: Wang, C. H.;Liu, Z. F.;Yu, L.;Tian, Z. M.;Yuan, S. L.;
7:2:15:27     Significant ferrimagnetism observed in Aurivillius Bi4Ti3O12 doped by antiferromagnetic LaFeO3
DOI:10.1063/1.3592737  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Wu, Fei-Xiang;Chen, Zhong;Chen, Y. B.;Zhang, Shan-Tao;Zhou, Jian;Zhu, Yong-Yuan;Chen, Yan-Feng;
7:2:15:28     Large magnetic response in (Bi4Nd)Ti-3(Fe0.5Co0.5)O-15 ceramic at room-temperature
DOI:10.1063/1.3671418  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Yang, F. J.;Su, P.;Wei, C.;Chen, X. Q.;Yang, C. P.;Cao, W. Q.;
7:2:15:29     Magnetic and optical properties of the Aurivillius phase Bi5Ti3FeO15
DOI:10.1016/j.matlet.2011.09.113  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: Wu, Maosong;Tian, Zhaoming;Yuan, Songliu;Huang, Zhengbei;
7:2:15:30     Magnetic and dielectric properties of Aurivillius phase Bi6Fe2Ti3-2xNbxCoxO18 (0 <= x <= 0.4)
DOI:10.1063/1.4865422  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Yuan, B.;Yang, J.;Chen, J.;Zuo, X. Z.;Yin, L. H.;Tang, X. W.;Zhu, X. B.;Dai, J. M.;Song, W. H.;Sun, Y. P.;
7:2:15:31     Room temperature multiferroic properties of Ni-doped Aurivillus phase Bi5Ti3FeO15
DOI:10.1016/j.ceramint.2013.10.063  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:8  AU: Chen, Xiaoqin;Xiao, Jun;Xue, Yun;Zeng, Xiangbin;Yang, Fujun;Su, Peng;
7:2:15:32     Inhomogeneous Structure and Magnetic Properties of Aurivillius Ceramics Bi4Bin-3Ti3Fen-3O3n+3
DOI:10.1111/jace.12614  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Li, Jing-Bo;Huang, Yong-Ping;Jin, Hai-Bo;Rao, Guang-Hui;Liang, Jing-Kui;
7:2:15:33     Structural and ferroelectric properties of epitaxial Bi5Ti3FeO15 and natural-superlattice-structured Bi4Ti3O12-Bi5Ti3FeO15 thin films
DOI:10.1063/1.3491023  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Nakashima, Seiji;Fujisawa, Hironori;Ichikawa, Satoshi;Park, Jung Min;Kanashima, Takeshi;Okuyama, Masanori;Shimizu, Masaru;
7:2:15:34     Observation of a new cryogenic temperature dielectric relaxation in multiferroic Bi7Fe3Ti3O21
DOI:10.1063/1.4821435  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Patwe, S. J.;Achary, S. N.;Manjanna, J.;Tyagi, A. K.;Deshpande, S. K.;Mishra, S. K.;Krishna, P. S. R.;Shinde, A. B.;
7:2:15:35     Structural changes in the homologous series of the Aurivillius phases Bin+1Fen-3Ti3O3n+3
DOI:10.1016/j.jallcom.2012.03.040  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:9  AU: Lomanova, N. A.;Semenov, V. G.;Panchuk, V. V.;Gusarov, V. V.;
7:2:15:36     Structural, electrical and magnetic characterisation of a new Aurivillius phase Bi5-xThxFe1+xTi3-xO15 (x=1/3)
DOI:10.1016/j.jallcom.2014.04.045  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Vlasenko, V. G.;Shuvaeva, V. A.;Levchenkov, S. I.;Zubavichus, Ya V.;Zubkov, S. V.;
7:2:15:37     Crystallographic and magnetic identification of secondary phase in orientated Bi5Fe0.5Co0.5Ti3O15 ceramics
DOI:10.1063/1.4754562  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Palizdar, Meghdad;Comyn, Tim P.;Ward, Michael B.;Brown, Andrew P.;Harrington, John P.;Kulkarni, Santosh;Keeney, Lynette;Roy, Saibal;Pemble, Martyn;Whatmore, Roger;Quinn, Christopher;Kilcoyne, Susan H.;Bell, Andrew J.;
7:2:15:38     Antiferromagnetic spin glass-like behavior in sintered multiferroic Aurivillius Bim+1Ti3Fem-3O3m+3 compounds
DOI:10.1016/j.jmmm.2013.04.046  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:17  AU: Jartych, E.;Pikula, T.;Mazurek, M.;Lisinska-Czekaj, A.;Czekaj, D.;Gaska, K.;Przewoznik, J.;Kapusta, C.;Surowiec, Z.;
7:2:15:39     Room temperature magnetoelectric coupling study in multiferroic Bi4NdTi3Fe0.7Ni0.3O15 prepared by a multicalcination procedure
DOI:10.1016/j.ceramint.2013.11.144  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Chen, Xiaoqin;Xiao, Jun;Yao, Jun;Kang, Zewei;Yang, Fujun;Zeng, Xiangbin;
7:2:15:40     Optical, ferroelectric, and piezoresponse force microscopy studies of pulsed laser deposited Aurivillius Bi5FeTi3O15 thin films
DOI:10.1063/1.4897556  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Kooriyattil, Sudheendran;Pavunny, Shojan P.;Barrionuevo, Danilo;Katiyar, Ram S.;
7:2:15:41     Hyperfine interactions in some Aurivillius Bim+1Ti3Fem-3O3m+3 compounds
DOI:10.1016/j.jmmm.2009.08.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:19  AU: Jartych, Elzbieta;Mazurek, Mariusz;Lisinska-Czekaj, Agata;Czekaj, Dionizy;
7:2:15:42     Structural stability of layered n-LaFeO3-Bi4Ti3O12, BiFeO3-Bi4Ti3O12, and SrTiO3-Bi4Ti3O12 thin films
DOI:10.1557/jmr.2012.337  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:2  AU: Zhou, Jian;Wu, Fei-Xiang;Chen, Y. B.;Zhang, Shan-Tao;Chen, Yan-Feng;
7:2:15:43     Influence of different synthesizing steps on the multiferroic properties of Bi5Fe1Ti3O15 and Bi5Fe0.5Co0.5Ti3O15 ceramics
DOI:10.1007/s10853-011-6129-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:9  AU: Mao, Xiangyu;Wang, Wei;Sun, Hui;Lu, Yalin;Chen, Xiaobing;
7:2:15:44     Multiferroic properties of Co and Nd co-substituted Bi5Ti3FeO15 thin films
DOI:10.1016/j.tsf.2012.06.081  JN:THIN SOLID FILMS  PY:2012
  TC:9  AU: Huang, Fengzhen;Lu, Xiaomei;Xu, TingTing;Liu, Yaoyang;Su, Weining;Jin, Yaming;Kan, Yi;Zhu, Jinsong;
7:2:15:45     Structure and Multiferroic Properties of V-doped Bi6Fe2Ti3O18 Thin Films Prepared by Chemical Solution Deposition
DOI:10.1080/00150193.2014.894357  JN:FERROELECTRICS  PY:2014
  TC:2  AU: Kim, H. J.;Kim, J. W.;Kim, E. J.;Choi, J. Y.;Raghavan, C. M.;Kim, W. -J.;Kim, M. H.;Song, T. K.;Kim, J. -W.;Kim, S. S.;
7:2:15:46     Transport and magnetic properties of Fe doped CaMnO3
DOI:10.1063/1.4770378  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Neetika;Das, A.;Dhiman, I.;Nigam, A. K.;Yadav, A. K.;Bhattacharyya, D.;Meena, S. S.;
7:2:15:47     Structure and hyperfine interactions of Bi9Ti3Fe5O27 multiferroic ceramic prepared by sintering and mechanical alloying methods
DOI:10.1016/j.jnoncrysol.2010.05.043  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2010
  TC:10  AU: Mazurek, M.;Jartych, E.;Lisinska-Czekaj, A.;Czekaj, D.;Oleszak, D.;
7:2:15:48     Structural transformation and magnetic properties of CaMn1-xFexO3-delta (0.0 <= x <= 0.5)
DOI:10.1016/j.matlet.2011.04.025  JN:MATERIALS LETTERS  PY:2011
  TC:4  AU: Singh, Brajendra;Manoharan, S. S.;
7:2:15:49     Effect of synthesis conditions on the morphology and crystal structure of biferroic Bi5Ti3FeO15
DOI:10.1016/j.ceramint.2013.12.094  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Garcia-Guaderrama, M.;Carbajal Arizaga, Gregorio Guadalupe;Duran, A.;
7:2:16:1     Conduction of Topologically Protected Charged Ferroelectric Domain Walls
DOI:10.1103/PhysRevLett.108.077203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:32  AU: Wu, Weida;Horibe, Y.;Lee, N.;Cheong, S-W.;Guest, J. R.;
7:2:16:2     Electrostatic topology of ferroelectric domains in YMnO3
DOI:10.1063/1.3460286  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:39  AU: Jungk, Tobias;Hoffmann, Akos;Fiebig, Manfred;Soergel, Elisabeth;
7:2:16:3     High-temperature phase transitions of hexagonal YMnO3
DOI:10.1103/PhysRevB.83.094111  JN:PHYSICAL REVIEW B  PY:2011
  TC:40  AU: Gibbs, Alexandra S.;Knight, Kevin S.;Lightfoot, Philip;
7:2:16:4     Observation of persistent centrosymmetricity in the hexagonal manganite family
DOI:10.1103/PhysRevB.85.174422  JN:PHYSICAL REVIEW B  PY:2012
  TC:18  AU: Kumagai, Yu;Belik, Alexei A.;Lilienblum, Martin;Leo, Naemi;Fiebig, Manfred;Spaldin, Nicola A.;
7:2:16:5     Imaging and characterization of conducting ferroelectric domain walls by photoemission electron microscopy
DOI:10.1063/1.4879260  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Schaab, J.;Krug, I. P.;Nickel, F.;Gottlob, D. M.;Doganay, H.;Cano, A.;Hentschel, M.;Yan, Z.;Bourret, E.;Schneider, C. M.;Ramesh, R.;Meier, D.;
7:2:16:6     Direct Observation of the Proliferation of Ferroelectric Loop Domains and Vortex-Antivortex Pairs
DOI:10.1103/PhysRevLett.108.167603  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:30  AU: Chae, S. C.;Lee, N.;Horibe, Y.;Tanimura, M.;Mori, S.;Gao, B.;Carr, S.;Cheong, S. -W.;
7:2:16:7     Resistive switching in polycrystalline YMnO3 thin films
DOI:10.1063/1.4899188  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Bogusz, A.;Mueller, A. D.;Blaschke, D.;Skorupa, I.;Buerger, D.;Scholz, A.;Schmidt, O. G.;Schmidt, H.;
7:2:16:8     Ferroelectric Switching Dynamics of Topological Vortex Domains in a Hexagonal Manganite
DOI:10.1002/adma.201204766  JN:ADVANCED MATERIALS  PY:2013
  TC:21  AU: Han, Myung-Geun;Zhu, Yimei;Wu, Lijun;Aoki, Toshihiro;Volkov, Vyacheslav;Wang, Xueyun;Chae, Seung Chul;Oh, Yoon Seok;Cheong, Sang-Wook;
7:2:16:9     Collective Magnetism at Multiferroic Vortex Domain Walls
DOI:10.1021/nl301432z  JN:NANO LETTERS  PY:2012
  TC:26  AU: Geng, Yanan;Lee, N.;Choi, Y. J.;Cheong, S. -W.;Wu, Weida;
7:2:16:10     Topology breaking of the vortex in multiferroic Y0.67Lu0.33MnO3
DOI:10.1063/1.4887057  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhang, Qing-Hua;Tan, Guo-Tai;Gu, Lin;Yao, Yuan;Jin, Chang-Qing;Wang, Yan-Guo;Duan, Xiao-Feng;Yu, Ri-Cheng;
7:2:16:11     Atomic-scale study of topological vortex-like domain pattern in multiferroic hexagonal manganites
DOI:10.1063/1.4813755  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Yu, Yi;Zhang, Xiaozhong;Zhao, Y. G.;Jiang, Ning;Yu, Rong;Wang, J. W.;Fan, C.;Sun, X. F.;Zhu, Jing;
7:2:16:12     Direct observation of interlocked domain walls in hexagonal RMnO3 (R = Tm, Lu)
DOI:10.1103/PhysRevB.85.020102  JN:PHYSICAL REVIEW B  PY:2012
  TC:14  AU: Zhang, Q. H.;Wang, L. J.;Wei, X. K.;Yu, R. C.;Gu, L.;Hirata, A.;Chen, M. W.;Jin, C. Q.;Yao, Y.;Wang, Y. G.;Duan, X. F.;
7:2:16:13     Piezoresponse force microscopy of domains and walls in multiferroic HoMnO3
DOI:10.1063/1.3665255  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Lochocki, Edward B.;Park, S.;Lee, Nara;Cheong, S. -W.;Wu, Weida;
7:2:16:14     Multivariate Statistical Characterization of Charged and Uncharged Domain Walls in Multiferroic Hexagonal YMnO3 Single Crystal Visualized by a Spherical Aberration-Corrected STEM
DOI:10.1021/nl402158c  JN:NANO LETTERS  PY:2013
  TC:9  AU: Matsumoto, Takao;Ishikawa, Ryo;Tohei, Tetsuya;Kimura, Hideo;Yao, Qiwen;Zhao, Hongyang;Wang, Xiaolin;Chen, Dapeng;Cheng, Zhenxiang;Shibata, Naoya;Ikuhara, Yuichi;
7:2:16:15     Spectroscopic signatures of domain walls in hexagonal ErMnO3
DOI:10.1103/PhysRevB.90.121303  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Sun, Q. -C.;Xi, Xiaoxiang;Wang, X.;Lee, N.;Mazumdar, D.;Smith, R. J.;Carr, G. L.;Cheong, S. -W.;Musfeldt, J. L.;
7:2:16:16     Bulk conduction and nonlinear behaviour in multiferroic YMnO3
DOI:10.1063/1.4824916  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Ren, Pengrong;Fan, Huiqing;Wang, Xin;
7:2:16:17     Evolution of the Domain Topology in a Ferroelectric
DOI:10.1103/PhysRevLett.110.167601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:11  AU: Chae, S. C.;Horibe, Y.;Jeong, D. Y.;Lee, N.;Iida, K.;Tanimura, M.;Cheong, S. -W.;
7:2:16:18     Hidden order in hexagonal RMnO3 multiferroics (R = Dy-Lu, In, Y, and Sc)
DOI:10.1103/PhysRevB.89.214107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Cano, A.;
7:2:16:19     Contribution to Pyroelectricity from Domain Walls and Substrate Strain
DOI:10.1080/00150193.2014.964103  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Scott, J. F.;
7:2:16:20     Polarization Structures of Topological Domains in Multiferroic Hexagonal Manganites
DOI:10.1111/jace.13257  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Cheng, Shaobo;Zhao, Yonggang;Sun, Xuefeng;Zhu, Jing;
7:2:16:21     MULTIFERROICS A whirlwind of opportunities
DOI:10.1038/nmat2700  JN:NATURE MATERIALS  PY:2010
  TC:22  AU: Mostovoy, Maxim;
7:2:16:22     Scanning secondary-electron microscopy on ferroelectric domains and domain walls in YMnO3
DOI:10.1063/1.4704165  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Li, J.;Yang, H. X.;Tian, H. F.;Ma, C.;Zhang, S.;Zhao, Y. G.;Li, J. Q.;
7:2:16:23     Unfolding of Vortices into Topological Stripes in a Multiferroic Material
DOI:10.1103/PhysRevLett.112.247601  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:2  AU: Wang, X.;Mostovoy, M.;Han, M. G.;Horibe, Y.;Aoki, T.;Zhu, Y.;Cheong, S. -W.;
7:2:16:24     Landau theory of topological defects in multiferroic hexagonal manganites
DOI:10.1038/NMAT3786  JN:NATURE MATERIALS  PY:2014
  TC:13  AU: Artyukhin, Sergey;Delaney, Kris T.;Spaldin, Nicola A.;Mostovoy, Maxim;
7:2:16:25     Combinatorial model for the ferroelectric domain-network formation in hexagonal manganites
DOI:10.1103/PhysRevB.89.024103  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Mettout, Bruno;Toledano, Pierre;Lilienblum, Martin;Fiebig, Manfred;
7:2:16:26     Complex structural-ferroelectric domain walls in thin films of hexagonal orthoferrites RFeO3 (R=Lu, Er)
DOI:10.1063/1.4821044  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Roddatis, Vladimir V.;Akbashev, Andrew R.;Lopatin, Sergei;Kaul, Andrey R.;
7:2:16:27     Structural coherence and ferroelectric order in nanosized multiferroic YMnO3
DOI:10.1103/PhysRevB.86.094101  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Tripathi, S.;Petkov, V.;Selbach, S. M.;Bergum, K.;Einarsrud, M. -A.;Grande, T.;Ren, Y.;
7:2:16:28     Iso-structural phase transition in YMnO3 nanosized particles
DOI:10.1063/1.4791596  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Tripathi, Saurabh;Petkov, Valeri;
7:2:16:29     Delicate balance between ferroelectricity and antiferroelectricity in hexagonal InMnO3
DOI:10.1103/PhysRevB.87.184109  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Huang, F. -T.;Wang, X.;Oh, Y. S.;Kurushima, K.;Mori, S.;Horibe, Y.;Cheong, S. -W.;
7:2:16:30     Ferroelectric annular domains in hexagonal manganites
DOI:10.1103/PhysRevB.87.094106  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Li, J.;Yang, H. X.;Tian, H. F.;Cheong, S. -W.;Ma, C.;Zhang, S.;Zhao, Y. G.;Li, J. Q.;
7:2:16:31     Manipulation of ferroelectric vortex domains in hexagonal manganites
DOI:10.1063/1.3623777  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Lilienblum, M.;Soergel, E.;Fiebig, M.;
7:2:16:32     Direct visualization of magnetoelectric domains
DOI:10.1038/NMAT3813  JN:NATURE MATERIALS  PY:2014
  TC:14  AU: Geng, Yanan;Das, Hena;Wysocki, Aleksander L.;Wang, Xueyun;Cheong, S-W.;Mostovoy, M.;Fennie, Craig J.;Wu, Weida;
7:2:16:33     Symmetry-mode analysis of the ferroelectric transition in YMnO3
DOI:10.1063/1.3472269  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Kim, Jinyoung;Koo, Yang Mo;Sohn, Kee-Sun;Shin, Namsoo;
7:2:16:34     High temperature dielectric properties of YMnO3 ceramics
DOI:10.1063/1.3629996  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Tomczyk, Monika;Vilarinho, Paula Maria;Moreira, Agostinho;Almeida, Abilio;
7:2:16:35     Growth of high-quality hexagonal ErMnO3 single crystals by the pressurized floating-zone method
DOI:10.1016/j.jcrysgro.2014.10.006  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:1  AU: Yan, Z.;Meier, D.;Schaab, J.;Ramesh, R.;Samulon, E.;Bourret, E.;
7:2:16:36     Giant Magnetic Fluctuations at the Critical Endpoint in Insulating HoMnO3
DOI:10.1103/PhysRevLett.110.157202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:1  AU: Choi, Y. J.;Lee, N.;Sharma, P. A.;Kim, S. B.;Vajk, O. P.;Lynn, J. W.;Oh, Y. S.;Cheong, S-W.;
7:2:16:37     Origin of microcracking in YMnO3 ceramics
DOI:10.1016/j.scriptamat.2011.11.014  JN:SCRIPTA MATERIALIA  PY:2012
  TC:4  AU: Tomczyk, Monika;Senos, Ana Maria;Vilarinho, Paula Maria;Reaney, Ian Michael;
7:2:16:38     Significant ferrimagnetisms observed in superlattice composed of antiferromagnetic LaFeO3 and YMnO3
DOI:10.1063/1.4789753  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Chen, Y. B.;Zhou, Jian;Zhang, Shan-Tao;Wu, Fei-Xiang;Yao, Shu-Hua;Gu, Zheng-Bin;Wu, Di;Chen, Yan-Feng;
7:2:16:39     Effects of electron irradiation on the ferroelectric 180 degrees in-plane nanostripe domain structure in a thin film prepared from a bulk single crystal of BaTiO3 by focused ion beam
DOI:10.1063/1.3487481  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Matsumoto, Takao;Okamoto, Masakuni;
7:2:16:40     Reduction of microcracking in YMnO3 ceramics by Ti substitution
DOI:10.1016/j.scriptamat.2012.04.042  JN:SCRIPTA MATERIALIA  PY:2012
  TC:0  AU: Tomczyk, M.;Senos, A. M. O. R.;Reaney, I. M.;Vilarinho, P. M.;
7:2:16:41     Stability of spontaneous polarization in ultrathin improper ferroelectrics
DOI:10.1103/PhysRevB.84.140101  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Sheng, Zhigao;Ogawa, Naoki;Ogimoto, Yasushi;Miyano, Kenjiro;
7:2:16:42     Multiple Stable States with In-Plane Anisotropy in Ultrathin YMnO3 Films
DOI:10.1002/adma.201002743  JN:ADVANCED MATERIALS  PY:2010
  TC:2  AU: Sheng, Zhigao;Ogawa, Naoki;Ogimoto, Yasushi;Miyano, Kenjiro;
7:2:16:43     Ferroelectric and Structural Antiphase Domain and Domain Wall Structures in Y(Mn,Ti)O-3
DOI:10.1080/00150193.2014.890855  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Mori, S.;Kurushima, K.;Kamo, H.;Ishii, Y.;Huang, F. -T.;Horibe, Y.;Kastufuji, T.;Cheong, S. -W.;
7:2:16:44     Color Theorems, Chiral Domain Topology, and Magnetic Properties of FexTaS2
DOI:10.1021/ja5026134  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2014
  TC:1  AU: Horibe, Yoichi;Yang, Junjie;Cho, Yong-Heum;Luo, Xuan;Kim, Sung Baek;Oh, Yoon Seok;Huang, Fei-Ting;Asada, Toshihiro;Tanimura, Makoto;Jeong, Dalyoung;Cheong, Sang-Wook;
7:2:16:45     New ferroelectric: Bis-thiourea pyridinium bromide inclusion compound
DOI:10.1557/jmr.2012.301  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:1  AU: Czarnecki, Piotr;Pajzderska, Aleksandra;Collet, Eric;Toupet, Loic;Wasicki, Jan;
7:2:16:46     Antiferromagnetic ordering in RMnO3 rare-earth manganites observed by optical spectroscopy
DOI:10.1016/j.materresbull.2011.08.019  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:1  AU: Kovacs, L.;Lengyel, K.;Gospodinov, M.;
7:2:17:1     Stability of the various crystallographic phases of the multiferroic (1-x)BiFeO3-xPbTiO(3) system as a function of composition and temperature
DOI:10.1063/1.3437396  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:31  AU: Bhattacharjee, Shuvrajyoti;Pandey, Dhananjai;
7:2:17:2     Mechanosynthesis of the whole xBiFeO(3)-(1-x)PbTiO3 multiferroic system: structural characterization and study of phase transitions
DOI:10.1039/c0jm03185b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:20  AU: Correas, Covadonga;Hungria, Teresa;Castro, Alicia;
7:2:17:3     Temperature-induced isostructural phase transition, associated large negative volume expansion, and the existence of a critical point in the phase diagram of the multiferroic (1-x)BiFeO3-xPbTiO(3) solid solution system
DOI:10.1103/PhysRevB.84.104116  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Bhattacharjee, Shuvrajyoti;Taji, Kazuaki;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;Pandey, Dhananjai;
7:2:17:4     Evidence for (Bi,Pb)-O Covalency in the High T-C Ferroelectric PbTiO3-BiFeO3 with Large Tetragonality
DOI:10.1021/cm2001184y  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:32  AU: Yashima, Masatomo;Omoto, Kazuki;Chen, Jun;Kato, Hiroki;Xing, Xianran;
7:2:17:5     Synthesis and multiferroism in mechanically processed BiFeO3-PbTiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2011.07.013  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:15  AU: Freitas, Valdirlei Fernandes;Cotica, Luiz Fernando;Santos, Ivair A.;Garcia, Ducinei;Eiras, Jose Antonio;
7:2:17:6     Nanostructured BiMnO3+delta obtained at ambient pressure: analysis of its multiferroicity
DOI:10.1039/c2jm15991k  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:9  AU: Castro, Alicia;Correas, Covadonga;Pena, Octavio;Landa-Canovas, Angel R.;Alguero, Miguel;Amorin, Harvey;Dolle, Mickael;Vila, Eladio;Hungria, Teresa;
7:2:17:7     Very high remnant polarization and phase-change electromechanical response of BiFeO3-PbTiO3 at the multiferroic morphotropic phase boundary
DOI:10.1063/1.4764537  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Amorin, H.;Correas, C.;Ramos, P.;Hungria, T.;Castro, A.;Alguero, M.;
7:2:17:8     High-resolution structural studies and covalent bond interactions in BiFeO3-PbTiO3 compounds: The role of ferroism
DOI:10.1063/1.4761989  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Cotica, L. F.;Freitas, V. F.;Catellani, I. B.;Santos, I. A.;Garcia, D.;Eiras, J. A.;
7:2:17:9     Heterophase states and domain effects in solid solutions of (1 - x)BiFeO3 - xPbTiO(3)
DOI:10.1063/1.4712631  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Topolov, V. Yu.;
7:2:17:10     Mechanosynthesis of the Orthorhombic Perovskites ErMn1-xNixO3 (x=0, 0.1). Processing and Characterization of Nanostructured Ceramics
DOI:10.1021/cm100236q  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:15  AU: Moure, A.;Hungria, T.;Castro, A.;Galy, J.;Pena, O.;Tartaj, J.;Moure, C.;
7:2:17:11     Piezoelectric Characterization of (0.6)BiFeO3-(0.4)PbTiO3 Multiferroic Ceramics
DOI:10.1111/j.1551-2916.2010.04118.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:17  AU: Freitas, Valdirlei F.;Santos, Ivair A.;Botero, Eriton;Fraygola, Barbara M.;Garcia, Ducinei;Eiras, Jose A.;
7:2:17:12     Effect of stress induced monoclinic to tetragonal phase transformation in the multiferroic (1-x)BiFeO3-xPbTiO(3) system on the width of the morphotropic phase boundary and the tetragonality
DOI:10.1063/1.3647755  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Bhattacharjee, Shuvrajyoti;Pandey, Dhananjai;
7:2:17:13     Intrinsic features of the magnetoeletric coupling mechanism in displacive multiferroics
DOI:10.1063/1.4824283  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Freitas, V. F.;Montanher, D. Z.;Bonadio, T. G. M.;Mazzocchi, V. L.;Mestnik-Filho, J.;Parente, C. B. R.;Garcia, D.;Eiras, J. A.;Cotica, L. F.;Santos, I. A.;
7:2:17:14     Simultaneous changes of nuclear and magnetic structures across the morphotropic phase boundary in (1-x)BiFeO3-xPbTiO(3)
DOI:10.1063/1.3533665  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Bhattacharjee, Shuvrajyoti;Senyshyn, Anatoliy;Krishna, P. S. R.;Fuess, H.;Pandey, Dhananjai;
7:2:17:15     Overlap of the intrinsic and extrinsic magnetoelectric effects in BiFeO3-PbTiO3 compounds: Potentialities for magnetic-sensing applications
DOI:10.1063/1.4775796  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Montanher, D. Z.;Freitas, V. F.;Pereira, J. R. D.;Cotica, L. F.;Garcia, D.;Eiras, J. A.;Santos, I. A.;
7:2:17:16     Magneto-structural study of the multiferroic BiFeo(3)-SrTiO3
DOI:10.1016/j.jmmm.2014.04.018  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Vura, Sandeep;Kumar, P. S. Anil;Senyshyn, Anatoliy;Ranjan, Rajeev;
7:2:17:17     Unconventional mechanism of stabilization of a tetragonal phase in the perovskite ferroelectric (PbTiO3)(1-x)(BiFeO3)(x)
DOI:10.1103/PhysRevB.82.054119  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Ranjan, Rajeev;Raju, K. Appala;
7:2:17:18     Competing structural phase transition scenarios in the giant tetragonality ferroelectric BiFeO3-PbTiO3: Isostructural vs multiphase transition
DOI:10.1063/1.4792215  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:13  AU: Kothai, V.;Senyshyn, Anatoliy;Ranjan, Rajeev;
7:2:17:19     Effect of oxygen annealing on the multiferroic properties of Ca2+ doped BiFeO3 nanoceramics
DOI:10.1063/1.4904861  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Tirupathi, Patri;Mandal, Satish Kumar;Chandra, Amreesh;
7:2:17:20     Tuning ferroic states in La doped BiFeO3-PbTiO3 displacive multiferroic compounds
DOI:10.1063/1.4890455  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Cotica, L. F.;Freitas, V. F.;Protzek, O. A.;Eiras, J. A.;Garcia, D.;Yokaichiya, F.;Santos, I. A.;Guo, R.;Bhalla, A. S.;
7:2:17:21     Multiferroism and enhancement of material properties across the morphotropic phase boundary of BiFeO3-PbTiO3
DOI:10.1063/1.4868319  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Amorin, H.;Correas, C.;Fernandez-Posada, C. M.;Pena, O.;Castro, A.;Alguero, M.;
7:2:17:22     Antiferromagnetic order in tetragonal bismuth ferrite-lead titanate
DOI:10.1016/j.jmmm.2011.06.009  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:12  AU: Comyn, Tim P.;Stevenson, Tim;Al-Jawad, Maisoon;Andre, Gilles;Bell, Andrew J.;Cywinski, Robert;
7:2:17:23     Ferroic states in La doped BiFeO3-PbTiO3 multiferroic compounds
DOI:10.1063/1.4729288  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Cotica, L. F.;Estrada, F. R.;Freitas, V. F.;Dias, G. S.;Santos, I. A.;Eiras, J. A.;Garcia, D.;
7:2:17:24     Metastable morphotropic phase boundary state in the multiferroic BiFeO3-PbTiO3
DOI:10.1063/1.4821511  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Kothai, V.;Babu, R. Prasath;Ranjan, Rajeev;
7:2:17:25     Reversible piezomagnetoelectric switching in bulk polycrystalline ceramics
DOI:10.1063/1.4894070  JN:APL MATERIALS  PY:2014
  TC:0  AU: Stevenson, T.;Bennett, J.;Brown, A. P.;Wines, T.;Bell, A. J.;Smith, R. I.;Comyn, T. P.;
7:2:17:26     Morin-type spin-reorientation transition below the Neel transition in the monoclinic compositions of (1-x) BiFeO3-xPbTiO(3) (x=0.25 and 0.27): A combined dc magnetization and x-ray and neutron powder diffraction study
DOI:10.1103/PhysRevB.87.054417  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Bhattacharjee, Shuvrajyoti;Senyshyn, Anatoliy;Fuess, Hartmut;Pandey, Dhananjai;
7:2:17:27     Neutron diffraction study of the coupling between spin, lattice, and structural degrees of freedom in 0.8BiFeO(3)-0.2PbTiO(3)
DOI:10.1063/1.3555093  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Ranjan, Rajeev;Kothai, V.;Senyshyn, Anatoliy;Boysen, Hans;
7:2:17:28     Enhanced magnetocapacitance and dielectric property of Co0.65Zn0.35Fe2O4-PbZr0.52Ti0.48O3 magnetodielectric composites
DOI:10.1016/j.jallcom.2014.02.036  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Mandal, P. R.;Nath, T. K.;
7:2:17:29     A phenomenological model for ferroelectric domain walls and its implications for BiFeO3-PbTiO3 multiferroic compounds
DOI:10.1039/c3tc31672f  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:3  AU: Freitas, Valdirlei F.;Protzek, Otavio A.;Montoro, Luciano A.;Goncalves, Andre M.;Garcia, Ducinei;Eiras, Jose A.;Guo, Ruyan;Bhalla, Amar S.;Cotica, Luiz F.;Santos, Ivair A.;
7:2:17:30     Preparation of multicomponent oxides by mechanochemical methods
DOI:10.1007/s10853-012-6909-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:9  AU: Fuentes, A. F.;Takacs, L.;
7:2:17:31     Bi-O covalency in PbTiO3-BiInO3 with enhanced ferroelectric properties: Synchrotron radiation diffraction and first-principles study
DOI:10.1063/1.4881614  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wang, Fangfang;Fan, Longlong;Ren, Yang;Chen, Jun;Xing, Xianran;
7:2:17:32     Local structure underlying anomalous tetragonal distortions in BiFeO3-PbTiO3 ferroelectrics
DOI:10.1063/1.4884946  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Levin, I.;Krayzman, V.;Tucker, M. G.;Woicik, J. C.;
7:2:17:33     Origin of large dielectric constant in La modified BiFeO3-PbTiO3 multiferroic
DOI:10.1063/1.3675279  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Singh, Anupinder;Chatterjee, Ratnamala;Mishra, S. K.;Krishna, P. S. R.;Chaplot, S. L.;
7:2:17:34     Local polar structure and multiferroic properties of (1-x)Bi0.9Dy0.1FeO3-xPbTiO(3) solid solution
DOI:10.1063/1.4891345  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhuang, Jian;Wu, Hua;Ren, Wei;Ye, Zuo-Guang;
7:2:17:35     Multiferroic bismuth manganite prepared by mechanochemical synthesis
DOI:10.1016/j.jeurceramsoc.2009.06.030  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Brankovic, Z.;Stanojevic, Z. Marinkovic;Mancic, L.;Vukotic, V.;Bernik, S.;Brankovic, G.;
7:2:17:36     Structural and magnetic properties of nanocrystalline bismuth manganite obtained by mechanochemical synthesis
DOI:10.1007/s11051-011-0265-7  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:6  AU: Stanojevic, Zorica Marinkovic;Brankovic, Z.;Jaglicic, Z.;Jagodic, M.;Mancic, L.;Bernik, S.;Recnik, A.;Brankovic, G.;
7:2:17:37     Synthesis, sintering and ionic conductivity of scandia-doped ceria ceramic materials obtained by different procedures
DOI:10.1016/j.ceramint.2012.04.041  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Moure, A.;Castro, A.;Martinez, I.;Moure, C.;Tartaj, J.;
7:2:17:38     On the microscopic mechanism for the stabilization of structural and ferroic states in displacive multiferroics
DOI:10.1063/1.4795766  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Freitas, V. F.;Bonadio, T. G. M.;Dias, G. S.;Protzek, O. A.;Medina, A. N.;Cotica, L. F.;Santos, I. A.;Garcia, D.;Eiras, J. A.;
7:2:17:39     Magnetic properties of nanoparticle La0.7Ca0.3MnO3 under applied hydrostatic pressure
DOI:10.1007/s11051-010-9852-2  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2010
  TC:9  AU: Kusigerski, V.;Markovic, D.;Spasojevic, V.;Tadic, M.;Zentkova, M.;Mihalik, M.;
7:2:17:40     Doping influence on the stability of YMnO3 orthorhombic perovskite obtained by mechanosynthesis
DOI:10.1016/j.matchemphys.2012.01.087  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:1  AU: Moure, A.;Hungria, T.;Castro, A.;Galy, J.;Pena, O.;Tartaj, J.;Moure, C.;
7:2:17:41     Structurally tuned multiferroic state in BiFeO3-based compounds
DOI:10.1007/s00339-012-7258-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Gotardo, R. A. M.;Cotica, L. F.;Santos, I. A.;Olzon-Dyonisio, M.;Souza, S. D.;Garcia, D.;Eiras, J. A.;Coelho, A. A.;
7:2:17:42     Multiferroic Properties of La-Rich BiFeO3-PbTiO3 Solid Solutions
DOI:10.1080/00150193.2012.722462  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Singh, Anupinder;Chatterjee, Ratnamala;
7:2:17:43     Multiferroic Behavior of Lead-free AlFeO3 and Mn, Nb Doped Compositions
DOI:10.1080/00150193.2014.875332  JN:FERROELECTRICS  PY:2014
  TC:2  AU: Santos, G. M.;Silva, D. M.;Freitas, V. F.;Dias, G. S.;Coelho, A. A.;Pal, M.;Santos, I. A.;Cotica, L. F.;Guo, R.;Bhalla, A. S.;
7:2:17:44     Magnetic field sensing with a single piezoelectric ceramic disk: Experiments and modeling
DOI:10.1063/1.3503424  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Guiffard, B.;Zhang, J. -W.;Guyomar, D.;Garbuio, L.;Cottinet, P. -J.;Belouadah, R.;
7:2:17:45     Pressure induced para-antiferromagnetic switching in BiFeO3-PbTiO3 as determined using in-situ neutron diffraction
DOI:10.1063/1.4804322  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Comyn, Tim P.;Stevenson, Tim;Al-Jawad, Maisoon;Marshall, William G.;Smith, Ronald I.;Herrero-Albillos, Julia;Cywinski, Robert;Bell, Andrew J.;
7:2:17:46     Synthesis of metastable Bi6Ti5WO22 phase by the mechanochemical method
DOI:10.1016/j.matlet.2012.12.016  JN:MATERIALS LETTERS  PY:2013
  TC:0  AU: Jardiel, Teresa;Calatayud, David G.;Rodriguez, Monica;Fernandez-Hevia, Daniel;Caballero, Amador C.;
7:2:17:47     Eddy current induced magnetoelectricity in a piezoelectric unimorph bender
DOI:10.1063/1.3298551  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Guiffard, B.;Guyomar, D.;Garbuio, L.;Belouadah, R.;Zhang, J.;Cottinet, P. J.;
7:2:17:48     Local structure underlying anomalous tetragonal distortions in BiFeO3-PbTiO3 ferroelectrics (vol 104, 242913, 2014)
DOI:10.1063/1.4889876  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Levin, I.;Krayzman, V.;Tucker, M. G.;Woicik, J. C.;
7:2:17:49     Optimization of the mechanochemical conditions for the synthesis of the xBiFeO(3)-(1-x)PbTiO3 multiferroic system
DOI:10.1016/j.jallcom.2011.02.097  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:0  AU: Correas, Covadonga;Martinez, Inmaculada;Castro, Alicia;Hungria, Teresa;
7:2:17:50     Structure, magnetic, and dielectric properties of (1-x)BiFeO3-xBaTiO(3) ceramics
DOI:10.1063/1.3554253  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Wang, T. -H.;Ding, Y.;Tu, C. -S.;Yao, Y. -D.;Wu, K. -T.;Lin, T. -C.;Yu, H. -H.;Ku, C. -S.;Lee, H. -Y.;
7:2:17:51     Magnetic relaxation behavior in Tb-doped perovskite manganite
DOI:10.1016/j.jmmm.2010.08.045  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:2  AU: Zhang, Yingtang;
7:2:18:1     Optical properties of quasi-tetragonal BiFeO3 thin films
DOI:10.1063/1.3364133  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:48  AU: Chen, P.;Podraza, N. J.;Xu, X. S.;Melville, A.;Vlahos, E.;Gopalan, V.;Ramesh, R.;Schlom, D. G.;Musfeldt, J. L.;
7:2:18:2     Temperature dependence of electronic transitions and optical properties in multiferroic BiFeO3 nanocrystalline film determined from transmittance spectra
DOI:10.1063/1.3489926  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:21  AU: Li, W. W.;Zhu, J. J.;Wu, J. D.;Gan, J.;Hu, Z. G.;Zhu, M.;Chu, J. H.;
7:2:18:3     Size-Dependent Infrared Phonon Modes and Ferroelectric Phase Transition in BiFeO3 Nanoparticles
DOI:10.1021/nl102470f  JN:NANO LETTERS  PY:2010
  TC:49  AU: Chen, Peng;Xu, Xiaoshan;Koenigsmann, Christopher;Santulli, Alexander C.;Wong, Stanislaus S.;Musfeldt, Janice L.;
7:2:18:4     Substrate influence on the optical and structural properties of pulsed laser deposited BiFeO3 epitaxial films
DOI:10.1063/1.3437059  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:33  AU: Himcinschi, C.;Vrejoiu, I.;Friedrich, M.;Nikulina, E.;Ding, L.;Cobet, C.;Esser, N.;Alexe, M.;Rafaja, D.;Zahn, D. R. T.;
7:2:18:5     Raman spectroscopy of single-domain multiferroic BiFeO3
DOI:10.1103/PhysRevB.81.064110  JN:PHYSICAL REVIEW B  PY:2010
  TC:31  AU: Palai, R.;Schmid, H.;Scott, J. F.;Katiyar, R. S.;
7:2:18:6     Influences of Oxygen Pressure on Optical Properties and Interband Electronic Transitions in Multiferroic Bismuth Ferrite Nanocrystalline Films Grown by Pulsed Laser Deposition
DOI:10.1021/am201340d  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2011
  TC:14  AU: Jiang, K.;Zhu, J. J.;Wu, J. D.;Sun, J.;Hu, Z. G.;Chu, J. H.;
7:2:18:7     Angular dispersion of oblique phonon modes in BiFeO3 from micro-Raman scattering
DOI:10.1103/PhysRevB.83.020101  JN:PHYSICAL REVIEW B  PY:2011
  TC:23  AU: Hlinka, J.;Pokorny, J.;Karimi, S.;Reaney, I. M.;
7:2:18:8     Charge transfer and electronic transitions in polycrystalline BiFeO3
DOI:10.1103/PhysRevB.82.012102  JN:PHYSICAL REVIEW B  PY:2010
  TC:25  AU: Ramachandran, B.;Dixit, A.;Naik, R.;Lawes, G.;Rao, M. S. Ramachandra;
7:2:18:9     Optical properties of integrated multiferroic BiFeO3 thin films for microwave applications
DOI:10.1063/1.3402763  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:19  AU: Allibe, J.;Bougot-Robin, K.;Jacquet, E.;Infante, I. C.;Fusil, S.;Carretero, C.;Reverchon, J. -L.;Marcilhac, B.;Crete, D.;Mage, J. -C.;Barthelemy, A.;Bibes, M.;
7:2:18:10     Thickness-dependent optical properties in compressively strained BiFeO3/LaAlO3 films grown by pulsed laser deposition
DOI:10.1016/j.materresbull.2013.12.048  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Duan, Zhihua;Jiang, Kai;Wu, Jiada;Sun, Jian;Hu, Zhigao;Chu, Junhao;
7:2:18:11     Lattice dynamics and dielectric functions of multiferroic BiFeO3/c-sapphire films determined by infrared reflectance spectra and temperature-dependent Raman scattering
DOI:10.1016/j.tsf.2012.10.062  JN:THIN SOLID FILMS  PY:2012
  TC:5  AU: Duan, Zhihua;Yu, Qian;Wu, Jiada;Sun, Jian;Hu, Zhigao;Chu, Junhao;
7:2:18:12     Optical anisotropy and charge-transfer transition energies in BiFeO3 from 1.0 to 5.5 eV
DOI:10.1103/PhysRevB.83.100101  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Choi, S. G.;Yi, H. T.;Cheong, S. -W.;Hilfiker, J. N.;France, R.;Norman, A. G.;
7:2:18:13     Anharmonic phonons and magnons in BiFeO3
DOI:10.1103/PhysRevB.85.064405  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Delaire, O.;Stone, M. B.;Ma, J.;Huq, A.;Gout, D.;Brown, C.;Wang, K. F.;Ren, Z. F.;
7:2:18:14     Phonon spectroscopy near phase transition temperatures in multiferroic BiFeO3 epitaxial thin films
DOI:10.1103/PhysRevB.81.024115  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Palai, R.;Scott, J. F.;Katiyar, R. S.;
7:2:18:15     Strain modulated optical properties in BiFeO3 thin films
DOI:10.1063/1.4827639  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Liu, H. L.;Lin, M. K.;Cai, Y. R.;Tung, C. K.;Chu, Y. H.;
7:2:18:16     Raman study of the phonon symmetries in BiFeO3 single crystals
DOI:10.1103/PhysRevB.86.020403  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Beekman, C.;Reijnders, A. A.;Oh, Y. S.;Cheong, S. W.;Burch, K. S.;
7:2:18:17     Linear electro-optic effect in multiferroic BiFeO3 thin films
DOI:10.1103/PhysRevB.89.195106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Sando, D.;Hermet, P.;Allibe, J.;Bourderionnet, J.;Fusil, S.;Carretero, C.;Jacquet, E.;Mage, J. -C.;Dolfi, D.;Barthelemy, A.;Ghosez, Ph.;Bibes, M.;
7:2:18:18     Synthesis and characterization of BiFeO3 nanowires and their applications in dye-sensitized solar cells
DOI:10.1016/j.mssp.2013.11.029  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:4  AU: Lotey, Gurmeet Singh;Verma, N. K.;
7:2:18:19     Effect of microstrain on the magnetic properties of BiFeO3 nanoparticles
DOI:10.1063/1.4897143  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Mocherla, Pavana S. V.;Karthik, C.;Ubic, R.;Rao, M. S. Ramachandra;Sudakar, C.;
7:2:18:20     Diversity of electronic transitions and photoluminescence properties in nanocrystalline Mn/Fe-doped tin dioxide semiconductor films: An effect from oxygen pressure
DOI:10.1063/1.3669374  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Yu, W. L.;Li, W. W.;Wu, J. D.;Sun, J.;Hu, Z. G.;Chu, J. H.;
7:2:18:21     Variation of the lattice and spin dynamics in Bi1-xDyxFeO3 nanoparticles
DOI:10.1063/1.4870475  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Liu, H. L.;Su, Y. C.;Tang, Y. H.;Lin, J. G.;
7:2:18:22     Coercivity and exchange bias of bismuth ferrite nanoparticles isolated by polymer coating
DOI:10.1063/1.4869657  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Chaturvedi, Smita;Shirolkar, Mandar M.;Rajendra, Ranguwar;Singh, Surjeet;Ballav, Nirmalya;Kulkarni, Sulabha;
7:2:18:23     Effect of annealing atmosphere on microstructural and photoluminescence characteristics of multiferroic BiFeO3 thin films prepared by pulsed laser deposition technique
DOI:10.1007/s00339-012-7194-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:9  AU: Prashanthi, K.;Gupta, M.;Tsui, Y. Y.;Thundat, T.;
7:2:18:24     Large nonlinear optical coefficients in pseudo-tetragonal BiFeO3 thin films
DOI:10.1063/1.4812978  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Haislmaier, Ryan C.;Podraza, Nikolas J.;Denev, Sava;Melville, Alex;Schlom, Darrell G.;Gopalan, Venkatraman;
7:2:18:25     Weak ferromagnetic ordering in Ca doped polycrystalline BiFeO3
DOI:10.1063/1.3678449  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:16  AU: Ramachandran, B.;Dixit, A.;Naik, R.;Lawes, G.;Rao, M. S. Ramachandra;
7:2:18:26     Dielectric relaxation and magneto-dielectric effect in polycrystalline Bi0.9Ca0.1FeO2.95
DOI:10.1063/1.4729415  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Ramachandran, B.;Dixit, A.;Naik, R.;Lawes, G.;Rao, M. S. Ramachandra;
7:2:18:27     Probing bismuth ferrite nanoparticles by hard x-ray photoemission: Anomalous occurrence of metallic bismuth
DOI:10.1063/1.4895672  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chaturvedi, Smita;Sarkar, Indranil;Shirolkar, Mandar M.;Jeng, U-Ser;Yeh, Yi-Qi;Rajendra, Ranguwar;Ballav, Nirmalya;Kulkarni, Sulabha;
7:2:18:28     Dielectric relaxation near 25 K in multiferroic BiFeO3 ceramics
DOI:10.1063/1.3662182  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Ramachandran, B.;Dixit, A.;Naik, R.;Lawes, G.;Rao, M. S. Ramachandra;
7:2:18:29     Phonon anomalies near the magnetic phase transitions in BiFeO3 thin films with rhombohedral R-3c symmetry
DOI:10.1063/1.3565191  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Singh, Manoj K.;Katiyar, Ram S.;
7:2:18:30     Chemical pressure effect on optical properties in multiferroic bulk BiFeO3
DOI:10.1063/1.4757589  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Ramachandran, B.;Rao, M. S. Ramachandra;
7:2:18:31     Characterization and visible light photocatalytic mechanism of size-controlled BiFeO3 nanoparticles
DOI:10.1016/j.materresbull.2013.04.058  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: He, Jian;Guo, Renqing;Fang, Liang;Dong, Wen;Zheng, Fengang;Shen, Mingrong;
7:2:18:32     Optical and electrical properties of spray pyrolysis deposited nano-crystalline BiFeO3 films
DOI:10.1063/1.3662093  JN:AIP ADVANCES  PY:2011
  TC:2  AU: Venkateswarlu, Annapu Reddy;Varma, G. D.;Nath, R.;
7:2:18:33     Spin cycloid destruction in Pr doped BiFeO3 films studied by conversion-electron Mossbauer spectroscopy
DOI:10.1063/1.4813133  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Xiao, Renzheng;Pelenovich, Vasiliy O.;Fu, Dejun;
7:2:18:34     Preparation and characterization of BiFeO3/LaNiO3 heterostructure films grown on silicon substrate
DOI:10.1016/j.jcrysgro.2009.11.058  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:4  AU: Li, Y. W.;Shen, Y. D.;Yue, F. Y.;Hu, Z. G.;Ma, X. M.;Chu, J. H.;
7:2:18:35     Raman spectroscopy of single-domain multiferroic BiFeO3 (vol 81, 064110, 2010)
DOI:10.1103/PhysRevB.81.139903  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Palai, R.;Schmid, H.;Scott, J. F.;Katiyar, R. S.;
7:2:18:36     Phonon Dynamics in BiFeO3 Studied by Raman Scattering
DOI:10.1080/00150191003751422  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Shimizu, Takao;Era, Takuro;Taniguchi, Hiroki;Fu, Desheng;Taniyama, Tomoyasu;Itoh, Mitsuru;
7:2:18:37     Large refractive index in BiFeO3-BiCoO3 epitaxial films
DOI:10.1063/1.4794878  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Shima, Hiromi;Nishida, Ken;Yamamoto, Takashi;Tadokoro, Toshiyasu;Tsutsumi, Koichi;Suzuki, Michio;Naganuma, Hiroshi;
7:2:19:1     Temperature-dependent properties of the magnetic order in single-crystal BiFeO3
DOI:10.1103/PhysRevB.83.174434  JN:PHYSICAL REVIEW B  PY:2011
  TC:34  AU: Ramazanoglu, M.;Ratcliff, W., II;Choi, Y. J.;Lee, Seongsu;Cheong, S. -W.;Kiryukhin, V.;
7:2:19:2     Magnetic Dispersion and Anisotropy in Multiferroic BiFeO3
DOI:10.1103/PhysRevLett.109.067205  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:28  AU: Matsuda, M.;Fishman, R. S.;Hong, T.;Lee, C. H.;Ushiyama, T.;Yanagisawa, Y.;Tomioka, Y.;Ito, T.;
7:2:19:3     Local Weak Ferromagnetism in Single-Crystalline Ferroelectric BiFeO3
DOI:10.1103/PhysRevLett.107.207206  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:39  AU: Ramazanoglu, M.;Laver, M.;Ratcliff, W., II;Watson, S. M.;Chen, W. C.;Jackson, A.;Kothapalli, K.;Lee, Seongsu;Cheong, S. -W.;Kiryukhin, V.;
7:2:19:4     Noncollinear magnetism and single-ion anisotropy in multiferroic perovskites
DOI:10.1103/PhysRevB.86.094413  JN:PHYSICAL REVIEW B  PY:2012
  TC:15  AU: Weingart, Carlo;Spaldin, Nicola;Bousquet, Eric;
7:2:19:5     Spin Wave Measurements over the Full Brillouin Zone of Multiferroic BiFeO3
DOI:10.1103/PhysRevLett.108.077202  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:24  AU: Jeong, Jaehong;Goremychkin, E. A.;Guidi, T.;Nakajima, K.;Jeon, Gun Sang;Kim, Shin-Ae;Furukawa, S.;Kim, Yong Baek;Lee, Seongsu;Kiryukhin, V.;Cheong, S-W.;Park, Je-Geun;
7:2:19:6     Long-wavelength magnetic and magnetoelectric excitations in the ferroelectric antiferromagnet BiFeO3
DOI:10.1103/PhysRevB.83.094403  JN:PHYSICAL REVIEW B  PY:2011
  TC:21  AU: Talbayev, D.;Trugman, S. A.;Lee, Seongsu;Yi, Hee Taek;Cheong, S-W;Taylor, A. J.;
7:2:19:7     Low-temperature evolution of the modulated magnetic structure in the ferroelectric antiferromagnet BiFeO3
DOI:10.1103/PhysRevB.84.144404  JN:PHYSICAL REVIEW B  PY:2011
  TC:18  AU: Sosnowska, I.;Przenioslo, R.;
7:2:19:8     Spin state and spectroscopic modes of multiferroic BiFeO3
DOI:10.1103/PhysRevB.87.134416  JN:PHYSICAL REVIEW B  PY:2013
  TC:12  AU: Fishman, Randy S.;Haraldsen, Jason T.;Furukawa, Nobuo;Miyahara, Shin;
7:2:19:9     Structural phase transitions of robust insulating Bi1-xLaxFe1-yTiyO3 multiferroics
DOI:10.1063/1.4869743  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Zhang, Linlin;Yu, Jian;Itoh, Mitsuru;
7:2:19:10     Spin cycloid quenching in Nd3+-substituted BiFeO3
DOI:10.1103/PhysRevB.86.014407  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Chen, P.;Guenaydin-Sen, Oe;Ren, W. J.;Qin, Z.;Brinzari, T. V.;McGill, S.;Cheong, S-W.;Musfeldt, J. L.;
7:2:19:11     Magnetic Cycloid of BiFeO3 from Atomistic Simulations
DOI:10.1103/PhysRevLett.109.037207  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:17  AU: Rahmedov, D.;Wang, Dawei;Iniguez, Jorge;Bellaiche, L.;
7:2:19:12     Orientation dependence of the critical magnetic field for multiferroic BiFeO3
DOI:10.1103/PhysRevB.88.104419  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Fishman, Randy S.;
7:2:19:13     Ultrafast Switching of the Electric Polarization and Magnetic Chirality in BiFeO3 by an Electric Field
DOI:10.1103/PhysRevLett.112.147601  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Bhattacharjee, Satadeep;Rahmedov, Dovran;Wang, Dawei;Iniguez, Jorge;Bellaiche, L.;
7:2:19:14     Terahertz Spectroscopy of Spin Waves in Multiferroic BiFeO3 in High Magnetic Fields
DOI:10.1103/PhysRevLett.110.257201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Nagel, U.;Fishman, Randy S.;Katuwal, T.;Engelkamp, H.;Talbayev, D.;Yi, Hee Taek;Cheong, S. -W.;Room, T.;
7:2:19:15     Field dependence of the spin state and spectroscopic modes of multiferroic BiFeO3
DOI:10.1103/PhysRevB.87.224419  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Fishman, Randy S.;
7:2:19:16     Spin-cycloid instability as the origin of weak ferromagnetism in the disordered perovskite Bi0.8La0.2Fe0.5Mn0.5O3
DOI:10.1103/PhysRevB.89.144422  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Bertinshaw, J.;Cortie, D. L.;Cheng, Z. X.;Avdeev, M.;Studer, A. J.;Klose, F.;Ulrich, C.;Wang, X. L.;
7:2:19:17     Field-induced phase transitions and phase diagrams in BiFeO3-like multiferroics
DOI:10.1103/PhysRevB.87.214413  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Gareeva, Z. V.;Popkov, A. F.;Soloviov, S. V.;Zvezdin, A. K.;
7:2:19:18     Temperature-Dependent Interplay of Dzyaloshinskii-Moriya Interaction and Single-Ion Anisotropy in Multiferroic BiFeO3
DOI:10.1103/PhysRevLett.113.107202  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:1  AU: Jeong, Jaehong;Le, Manh Duc;Bourges, P.;Petit, S.;Furukawa, S.;Kim, Shin-Ae;Lee, Seongsu;Cheong, S-W.;Park, Je-Geun;
7:2:19:19     X-Ray Imaging and Multiferroic Coupling of Cycloidal Magnetic Domains in Ferroelectric Monodomain BiFeO3
DOI:10.1103/PhysRevLett.110.217206  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:10  AU: Johnson, R. D.;Barone, P.;Bombardi, A.;Bean, R. J.;Picozzi, S.;Radaelli, P. G.;Oh, Y. S.;Cheong, S. -W.;Chapon, L. C.;
7:2:19:20     Thermal evolution of the full three-dimensional magnetic excitations in the multiferroic BiFeO3
DOI:10.1103/PhysRevB.86.174419  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Xu, Zhijun;Wen, Jinsheng;Berlijn, Tom;Gehring, Peter M.;Stock, Christopher;Stone, M. B.;Ku, Wei;Gu, Genda;Shapiro, Stephen M.;Birgeneau, R. J.;Xu, Guangyong;
7:2:19:21     Negative magnetostrictive magnetoelectric coupling of BiFeO3
DOI:10.1103/PhysRevB.88.060103  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Lee, Sanghyun;Fernandez-Diaz, M. T.;Kimura, H.;Noda, Y.;Adroja, D. T.;Lee, Seongsu;Park, Junghwan;Kiryukhin, V.;Cheong, S. -W.;Mostovoy, M.;Park, Je-Geun;
7:2:19:22     Crystal structure and magnetic properties of Bi(0.8)A(0.2)FeO(3) (A = La, Ca, Sr, Ba) multiferroics using neutron diffraction and Mossbauer spectroscopy
DOI:10.1063/1.4893241  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Rangi, Manisha;Agarwal, Ashish;Sanghi, Sujata;Singh, Ripandeep;Meena, S. S.;Das, A.;
7:2:19:23     Theory of Spin-Orbit Enhanced Electric-Field Control of Magnetism in Multiferroic BiFeO3
DOI:10.1103/PhysRevLett.110.267202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:5  AU: de Sousa, Rogerio;Allen, Marc;Cazayous, Maximilien;
7:2:19:24     Identifying the spectroscopic modes of multiferroic BiFeO3
DOI:10.1103/PhysRevB.86.220402  JN:PHYSICAL REVIEW B  PY:2012
  TC:22  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;
7:2:19:25     Origin of magnetic anisotropy and spiral spin order in multiferroic BiFeO3
DOI:10.1063/1.4729555  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Zhang, J. T.;Lu, X. M.;Zhou, J.;Sun, H.;Su, J.;Ju, C. C.;Huang, F. Z.;Zhu, J. S.;
7:2:19:26     Predicted Coupling of the Electromagnetic Angular Momentum Density with Magnetic Moments
DOI:10.1103/PhysRevLett.110.137205  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:7  AU: Raeliarijaona, Aldo;Singh, Surendra;Fu, Huaxiang;Bellaiche, L.;
7:2:19:27     Synthesis, structural and magnetic characterization of highly ordered single crystalline BiFeO3 nanotubes
DOI:10.1016/j.materresbull.2012.12.066  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: de Oliveira, L. A. S.;Pirota, K. R.;
7:2:19:28     Field-induced phase transitions and phase diagrams in BiFeO3-like multiferroics (vol 87, 214413, 2013)
DOI:10.1103/PhysRevB.88.059901  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Gareeva, Z. V.;Popkov, A. F.;Soloviov, S. V.;Zvezdin, A. K.;
7:2:19:29     Magnetic Relaxation in Bismuth Ferrite Micro-Cubes
DOI:10.1080/00150193.2013.822287  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Andrzejewski, B.;Chybczynska, K.;Pogorzelec-Glaser, K.;Hilczer, B.;Tolinski, T.;Leska, B.;Pankiewicz, R.;Cieluch, P.;
7:2:19:30     X-Ray Imaging and Multiferroic Coupling of Cycloidal Magnetic Domains in Ferroelectric Monodomain BiFeO3 (vol 110, 217206, 2013)
DOI:10.1103/PhysRevLett.111.109903  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:0  AU: Johnson, R. D.;Barone, P.;Bombardi, A.;Bean, R. J.;Picozzi, S.;Radaelli, P. G.;Oh, Y. S.;Cheong, S-W.;Chapon, L. C.;
7:2:20:1     BiFeO3 Ceramics: Processing, Electrical, and Electromechanical Properties
DOI:10.1111/jace.12982  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:10  AU: Rojac, Tadej;Bencan, Andreja;Malic, Barbara;Tutuncu, Goknur;Jones, Jacob L.;Daniels, John E.;Damjanovic, Dragan;
7:2:20:2     Strong ferroelectric domain-wall pinning in BiFeO3 ceramics
DOI:10.1063/1.3490249  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:56  AU: Rojac, Tadej;Kosec, Marija;Budic, Bojan;Setter, Nava;Damjanovic, Dragan;
7:2:20:3     Electrical Properties of Ca-Doped BiFeO3 Ceramics: From p-Type Semiconduction to Oxide-Ion Conduction
DOI:10.1021/cm300683e  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:36  AU: Maso, Nahum;West, Anthony R.;
7:2:20:4     Intrinsic defects in multiferroic BiFeO3 and their effect on magnetism
DOI:10.1103/PhysRevB.85.104409  JN:PHYSICAL REVIEW B  PY:2012
  TC:21  AU: Paudel, Tula R.;Jaswal, Sitaram S.;Tsymbal, Evgeny Y.;
7:2:20:5     Tailoring the structure and piezoelectric properties of BiFeO3-(K0.5Bi0.5)TiO3-PbTiO3 ceramics for high temperature applications
DOI:10.1063/1.4824652  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Bennett, J.;Bell, A. J.;Stevenson, T. J.;Comyn, T. P.;
7:2:20:6     Control of conductivity and electric field induced strain in bulk Bi0.5K0.5TiO3-BiFeO3 ceramics
DOI:10.1063/1.4869976  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Morozov, Maxim I.;Einarsrud, Mari-Ann;Grande, Tor;
7:2:20:7     Atmosphere controlled conductivity and Maxwell-Wagner relaxation in Bi0.5K0.5TiO3-BiFeO3 ceramics
DOI:10.1063/1.4863798  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Morozov, Maxim I.;Einarsrud, Mari-Ann;Grande, Tor;
7:2:20:8     Large Electric-Field Induced Strain in BiFeO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04861.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:19  AU: Rojac, Tadej;Kosec, Marija;Damjanovic, Dragan;
7:2:20:9     Piezoelectric nonlinearity and frequency dispersion of the direct piezoelectric response of BiFeO3 ceramics
DOI:10.1063/1.4754315  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:13  AU: Rojac, Tadej;Bencan, Andreja;Drazic, Goran;Kosec, Marija;Damjanovic, Dragan;
7:2:20:10     Structural and piezoelectric properties of high-density (Bi0.5K0.5)TiO3-BiFeO3 ceramics
DOI:10.1063/1.3506717  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:27  AU: Matsuo, Hiroki;Noguchi, Yuji;Miyayama, Masaru;Suzuki, Muneyasu;Watanabe, Akira;Sasabe, Shuji;Ozaki, Tomoatsu;Mori, Shigeo;Torii, Shuki;Kamiyama, Takashi;
7:2:20:11     Polarization and strain response in Bi0.5K0.5TiO3-BiFeO3 ceramics
DOI:10.1063/1.4772588  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Morozov, Maxim I.;Einarsrud, Mari-Ann;Grande, Tor;
7:2:20:12     Temperature dependence of the intrinsic and extrinsic contributions in BiFeO3-(K0.5Bi0.5)TiO3-PbTiO3 piezoelectric ceramics
DOI:10.1063/1.4894443  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Bennett, J.;Shrout, T. R.;Zhang, S. J.;Mandal, P.;Bell, A. J.;Stevenson, T. J.;Comyn, T. P.;
7:2:20:13     Multiferroic properties of BiFeO3-(K0.5Bi0.5)TiO3 ceramics
DOI:10.1016/j.matlet.2012.12.053  JN:MATERIALS LETTERS  PY:2013
  TC:13  AU: Bennett, J.;Bell, A. J.;Stevenson, T. J.;Smith, R. I.;Sterianou, I.;Reaney, I. M.;Comyn, T. P.;
7:2:20:14     Density functional theory plus U study of vacancy formations in bismuth ferrite
DOI:10.1063/1.3447369  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Zhang, Zhen;Wu, Ping;Chen, Lang;Wang, Junling;
7:2:20:15     Lead-Free Relaxor-Like 0.75Bi(0.5)K(0.5)TiO(3)-0.25BiFeO(3) Ceramics with Large Electric Field-Induced Strain
DOI:10.1080/00150193.2012.741946  JN:FERROELECTRICS  PY:2012
  TC:9  AU: Morozov, M. I.;Einarsrud, M. -A.;Grande, T.;Damjanovic, D.;
7:2:20:16     Dielectric, Ferroelectric, and Piezoelectric Properties of BiFeO3-BaTiO3 Ceramics
DOI:10.1111/jace.12475  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Wei, Yongxing;Wang, Xiaotao;Zhu, Jintao;Wang, Xiaoli;Jia, Jiangjiang;
7:2:20:17     Dielectric and magnetic properties of BiFe1-4x/3TixO3 ceramics with iron vacancies: Experimental and first-principles studies
DOI:10.1063/1.4813784  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Zou, L. Y.;Yang, R. P.;Lin, Y. B.;Qin, M. H.;Gao, X. S.;Zeng, M.;Liu, J. -M.;
7:2:20:18     Association of microstructure and electric heterogeneity in BiFeO3
DOI:10.1016/j.matchemphys.2013.08.061  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:4  AU: Makhdoom, A. R.;Akhtar, M. J.;Khan, R. T. A.;Rafiq, M. A.;Hasan, M. M.;Sher, F.;Fitch, A. N.;
7:2:20:19     Exceptionally large piezoelectric strains in BiFeO3-(K0.5Bi0.5)TiO3-PbTiO3 ceramics
DOI:10.1016/j.scriptamat.2012.11.029  JN:SCRIPTA MATERIALIA  PY:2013
  TC:9  AU: Bennett, J.;Bell, A. J.;Stevenson, T. J.;Comyn, T. P.;
7:2:20:20     Defect-mediated ferroelectric domain depinning of polycrystalline BiFeO3 multiferroic thin films
DOI:10.1063/1.4867703  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Bretos, I.;Jimenez, R.;Gutierrez-Lazaro, C.;Montero, I.;Calzada, M. L.;
7:2:20:21     Piezoelectric and Dielectric Properties of Lead-Free (1-x)(Bi0.5K0.5)TiO3-xBiFeO(3) Ceramics
DOI:10.1080/00150193.2010.482448  JN:FERROELECTRICS  PY:2010
  TC:14  AU: Kim, J. M.;Sung, Y. S.;Cho, J. H.;Song, T. K.;Kim, M. H.;Chong, H. H.;Park, T. G.;Do, D.;Kim, S. S.;
7:2:20:22     First-principles study on the magnetic properties in Mg doped BiFeO3 with and without oxygen vacancies
DOI:10.1063/1.4850975  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Yang, Ruipeng;Lin, Sixian;Fang, Xiaogong;Gao, Xingsen;Zeng, Min;Liu, Junming;
7:2:20:23     Analysis of the Phase Transition and the Domain Structure in K0.5Bi0.5TiO3 Perovskite Ceramics by In Situ XRD and TEM
DOI:10.1111/j.1551-2916.2010.04013.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:14  AU: Otonicar, Mojca;Skapin, Sreco D.;Jancar, Bostjan;Ubic, Rick;Suvorov, Danilo;
7:2:20:24     Solid-State Synthesis and Properties of Relaxor (1-x)BKT-xBNZ Ceramics
DOI:10.1111/jace.13066  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Wefring, Espen T.;Morozov, Maxim I.;Einarsrud, Mari-Ann;Grande, Tor;
7:2:20:25     Ferroelectric phases and relaxor states in the novel lead-free (1-x) Bi1/2K1/2TiO3 - x BiScO3 system (0 <= x <= 0.3)
DOI:10.1007/s10853-011-6222-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:5  AU: Martin-Arias, L.;Castro, A.;Alguero, M.;
7:2:20:26     Pyroelectric properties of BiFeO3 ceramics prepared by a modified solid-state-reaction method
DOI:10.1007/s00339-009-5499-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:9  AU: Yao, Yingbang;Ploss, Bernd;Mak, C. L.;Wong, K. H.;
7:2:20:27     Dielectric and ferroelectric behaviors of BaTiO3-(K1/4Bi3/4)(Mg1/4Ti3/4)O-3 ceramics
DOI:10.1063/1.3531563  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Lu, Bin;Wang, Xiaoli;Shi, Jing;
7:2:20:28     High ferromagnetic transition temperature in multiferroic BiFe0.95Ni0.05O3 compound
DOI:10.1063/1.4826623  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Yoo, Y. J.;Hwang, J. S.;Lee, Y. P.;Park, J. S.;Kang, J. -H.;Kim, J.;Lee, B. W.;Seo, M. S.;
7:2:20:29     Effect of lanthanum substitution on microstructure and electrical properties of (Bi0.5Na0.5)(1-1.5x)LaxTi0.41Zr0.59O3 ceramics
DOI:10.1016/j.ceramint.2011.05.016  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Jaiban, Panupong;Jiansirisomboon, Sukanda;Watcharapasorn, Anucha;
7:2:20:30     Preparation and Electrical Properties of Chemical Solution Deposited Ho- and Ti-co-doped BiFeO3 Thin Films
DOI:10.1080/00150193.2013.846153  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Kim, Y. J.;Kim, J. W.;Kim, S. S.;
7:2:21:1     Epitaxial-Strain-Induced Multiferroicity in SrMnO3 from First Principles
DOI:10.1103/PhysRevLett.104.207204  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:95  AU: Lee, Jun Hee;Rabe, Karin M.;
7:2:21:2     Spin-phonon coupling effects in transition-metal perovskites: A DFT+U and hybrid-functional
DOI:10.1103/PhysRevB.85.054417  JN:PHYSICAL REVIEW B  PY:2012
  TC:37  AU: Hong, Jiawang;Stroppa, Alessandro;Iniguez, Jorge;Picozzi, Silvia;Vanderbilt, David;
7:2:21:3     Displacement-Type Ferroelectricity with Off-Center Magnetic Ions in Perovskite Sr1-xBaxMnO3
DOI:10.1103/PhysRevLett.107.137601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:30  AU: Sakai, H.;Fujioka, J.;Fukuda, T.;Okuyama, D.;Hashizume, D.;Kagawa, F.;Nakao, H.;Murakami, Y.;Arima, T.;Baron, A. Q. R.;Taguchi, Y.;Tokura, Y.;
7:2:21:4     Coupled Magnetic-Ferroelectric Metal-Insulator Transition in Epitaxially Strained SrCoO3 from First Principles
DOI:10.1103/PhysRevLett.107.067601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:20  AU: Lee, Jun Hee;Rabe, Karin M.;
7:2:21:5     Raman studies of spin-phonon coupling in hexagonal BaFe12O19
DOI:10.1063/1.4812575  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Chen, Xiang-Bai;Nguyen Thi Minh Hien;Han, Kiok;Sur, Jung Chul;Sung, N. H.;Cho, B. K.;Yang, In-Sang;
7:2:21:6     Pseudo Jahn-Teller Origin of Perovskite Multiferroics, Magnetic-Ferroelectric Crossover, and Magnetoelectric Effects: The d(0)-d(10) Problem
DOI:10.1103/PhysRevLett.108.137202  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:22  AU: Bersuker, Isaac B.;
7:2:21:7     Incipient ferroelectricity in 2.3% tensile-strained CaMnO3 films
DOI:10.1103/PhysRevB.85.214120  JN:PHYSICAL REVIEW B  PY:2012
  TC:12  AU: Guenter, T.;Bousquet, E.;David, A.;Boullay, Ph.;Ghosez, Ph.;Prellier, W.;Fiebig, M.;
7:2:21:8     Electron doping in the cubic perovskite SrMnO3: Isotropic metal versus chainlike ordering of Jahn-Teller polarons
DOI:10.1103/PhysRevB.82.180409  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Sakai, H.;Ishiwata, S.;Okuyama, D.;Nakao, A.;Nakao, H.;Murakami, Y.;Taguchi, Y.;Tokura, Y.;
7:2:21:9     Benchmark study for the application of density functional theory to the prediction of octahedral tilting in perovskites
DOI:10.1103/PhysRevB.86.144107  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Garcia-Fernandez, P.;Ghosh, S.;English, Niall J.;Aramburu, J. A.;
7:2:21:10     Soft phonon mode coupled with antiferromagnetic order in incipient-ferroelectric Mott insulators Sr1-xBaxMnO3
DOI:10.1103/PhysRevB.86.104407  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Sakai, H.;Fujioka, J.;Fukuda, T.;Bahramy, M. S.;Okuyama, D.;Arita, R.;Arima, T.;Baron, A. Q. R.;Taguchi, Y.;Tokura, Y.;
7:2:21:11     Improper origin of polar displacements at CaTiO3 and CaMnO3 twin walls
DOI:10.1103/PhysRevB.89.144104  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Barone, Paolo;Di Sante, Domenico;Picozzi, Silvia;
7:2:21:12     Large spin-phonon coupling and magnetically induced phonon anisotropy in SrMO3 perovskites (M = V,Cr,Mn,Fe,Co)
DOI:10.1103/PhysRevB.84.104440  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Lee, Jun Hee;Rabe, Karin M.;
7:2:21:13     Epitaxial strain effects on magnetic ordering and spin-phonon couplings in the (SrMnO3)(1)/(LaMnO3)(1) superlattice from first principles
DOI:10.1103/PhysRevB.88.094416  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Zhou, Yuanjun;Rabe, Karin M.;
7:2:21:14     Strong spin-phonon coupling in infrared and Raman spectra of SrMnO3
DOI:10.1103/PhysRevB.89.064308  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kamba, S.;Goian, V.;Skoromets, V.;Hejtmanek, J.;Bovtun, V.;Kempa, M.;Borodavka, F.;Vanek, P.;Belik, A. A.;Lee, J. H.;Pacherova, O.;Rabe, K. M.;
7:2:21:15     Polar Antiferromagnets Produced with Orbital Order
DOI:10.1103/PhysRevLett.108.157603  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:3  AU: Ogawa, Naoki;Ogimoto, Yasushi;Ida, Yoshiaki;Nomura, Yusuke;Arita, Ryotaro;Miyano, Kenjiro;
7:2:21:16     Mechanism of ferroelectricity in d(3) perovskites: A model study
DOI:10.1103/PhysRevB.84.134101  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Barone, Paolo;Kanungo, Sudipta;Picozzi, Silvia;Saha-Dasgupta, Tanusri;
7:2:21:17     Crystal structure and magnetic properties of 6H-SrMnO3
DOI:10.1103/PhysRevB.84.094438  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Belik, Alexei A.;Matsushita, Yoshitaka;Katsuya, Yoshio;Tanaka, Masahiko;Kolodiazhnyi, Taras;Isobe, Masaaki;Takayama-Muromachi, Eiji;
7:2:21:18     Microscopic Origin of Large Negative Magnetoelectric Coupling in Sr1/2Ba1/2MnO3
DOI:10.1103/PhysRevLett.109.107601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:9  AU: Giovannetti, Gianluca;Kumar, Sanjeev;Ortix, Carmine;Capone, Massimo;van den Brink, Jeroen;
7:2:21:19     Orbital-Ordering-Induced Ferroelectricity in SrCrO3
DOI:10.1103/PhysRevLett.111.077601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Gupta, Kapil;Mahadevan, Priya;Mavropoulos, Phivos;Lezaic, Marjana;
7:2:21:20     Influence of magnetic ordering on structural instabilities in insulating perovskites
DOI:10.1103/PhysRevB.83.174406  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Garcia-Fernandez, Pablo;Antonio Aramburu, Jose;Moreno, Miguel;
7:2:21:21     Mechanism of ferroelectric instabilities in non-d(0) perovskites: LaCrO3 versus CaMnO3
DOI:10.1103/PhysRevB.83.054110  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Ederer, Claude;Harris, Tim;Kovacik, Roman;
7:2:21:22     Determination of ground-state and low-energy structures of perovskite superlattices from first principles
DOI:10.1103/PhysRevB.89.214108  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Zhou, Yuanjun;Rabe, Karin M.;
7:2:21:23     Effect of site-disorder on magnetism and magneto-structural coupling in gallium ferrite: A first-principles study
DOI:10.1063/1.3688852  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Roy, Amritendu;Prasad, Rajendra;Auluck, Sushil;Garg, Ashish;
7:2:21:24     Neutron scattering studies of the ferroelectric distortion and spin dynamics in the type-1 multiferroic perovskite Sr0.56Ba0.44MnO3
DOI:10.1103/PhysRevB.90.140401  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Pratt, Daniel K.;Lynn, Jeffrey W.;Mais, James;Chmaissem, Omar;Brown, Dennis E.;Kolesnik, Stanislaw;Dabrowski, Bogdan;
7:2:21:25     Strain-induced metal-insulator transition in ultrathin films of SrRuO3
DOI:10.1103/PhysRevB.90.125109  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Gupta, Kapil;Mandal, Basudeb;Mahadevan, Priya;
7:2:21:26     Theoretical study of magnetic phase transitions of cubic SrMnO3 under physical and chemical pressures
DOI:10.1016/j.commatsci.2013.11.022  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:1  AU: Chen, Xing-Yuan;Zhu, Wei-ling;Lin, Shi-Yuan;Zhao, Yu-Jun;
7:2:21:27     Origin of the different multiferroism in BiFeO3 and GaFeO3
DOI:10.1063/1.4791586  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Bahoosh, S. G.;Wesselinowa, J. M.;
7:2:21:28     Thermoelectric Properties of Electron-Doped SrMnO3 Single Crystals with Perovskite Structure
DOI:10.1007/s11664-011-1860-1  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:3  AU: Suzuki, T.;Sakai, H.;Taguchi, Y.;Tokura, Y.;
7:2:21:29     Structure and Properties of Magnetoelectric Gallium Ferrite: A Brief Review
DOI:10.1080/00150193.2014.923704  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Roy, Amritendu;Mukherjee, Somdutta;Gupta, Rajeev;Prasad, Rajendra;Garg, Ashish;
7:2:21:30     Spin-lattice coupling and phonon dispersion of CdCr2O4 from first principles
DOI:10.1103/PhysRevB.86.184429  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;Unusual temperature dependence of the spectral weight near the Fermi;level of NdNiO3 thin films;PHYSICAL REVIEW B;86;19;195147;10.1103/PhysRevB.86.195147;NOV 30 2012;2012;We investigate the behavior of the spectral weight near the Fermi level;of NdNiO3 thin films as a function of temperature across the;metal-to-insulator transition (MIT) by means of ultraviolet;photoelectron spectroscopy. The spectral weight was found to exhibit;thermal hysteresis, similar to that of the dc conductivity. A detailed;analysis of the temperature dependence reveals two distinct regimes of;spectral loss close to the Fermi level. The temperature evolution of one;regime is found to be independent of the MIT.;Garcia-Fernandez, Mirian/B-6018-2013; Zubko, Pavlo/B-5496-2009;Zubko, Pavlo/0000-0002-7330-3163;2;0;0;0;2;1098-0121;WOS:000311715000006;;;J;Sen, Arnab;Damle, Kedar;Moessner, R.;Vacancy-induced spin textures and their interactions in a classical spin;liquid;PHYSICAL REVIEW B;86;20;205134;10.1103/PhysRevB.86.205134;NOV 30 2012;2012;Motivated by experiments on the archetypal frustrated magnet;SrCr9pGa12-9pO19 (SCGO), we study the classical Heisenberg model on the;pyrochlore slab (kagome bilayer) lattice with site dilution x = 1 - p.;This allows us to address generic aspects of the physics of nonmagnetic;vacancies in a classical spin liquid. We explicitly demonstrate that the;pure (x = 0) system remains a spin liquid down to the lowest;temperatures, with an unusual nonmonotonic temperature dependence of the;susceptibility, which even turns diamagnetic for the apical spins;between the two kagome layers. For x > 0 but small, the low-temperature;magnetic response of the system is most naturally described in terms of;the properties of spatially extended spin textures that cloak an;"orphan" S = 3/2 Cr3+ spin in direct proximity to a pair of missing;sites belonging to the same triangular simplex. In the T -> 0 limit,;these orphan-texture complexes each carry a net magnetization that is;exactly half the magnetic moment of an individual spin of the undiluted;system. Furthermore, we demonstrate that they interact via an entropic;temperature-dependent pairwise exchange interaction J(eff) (T,(r) over;right arrow) similar to T J ((r) over right arrow root T) that has a;logarithmic form at short distances and decays exponentially beyond a;thermal correlation length xi(T) similar to 1/root T. The sign of J(eff);depends on whether the two orphan spins belong to the same kagome layer;or not. We provide a detailed analytical account of these properties;using an effective field theory approach specifically tailored for the;problem at hand. These results are in quantitative agreement with;large-scale Monte Carlo numerics.;3;1;0;0;3;1098-0121;WOS:000311715100008;;;J;Solanki, Ravindra Singh;Mishra, S. K.;Senyshyn, Anatoliy;Ishii, I.;Moriyoshi, Chikako;Suzuki, Takashi;Kuroiwa, Yoshihiro;Pandey, Dhananjai;Antiferrodistortive phase transition in pseudorhombohedral;(Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and;neutron powder diffraction study;PHYSICAL REVIEW B;86;17;174117;10.1103/PhysRevB.86.174117;NOV 30 2012;2012;The controversies about the structure of the true ground state of;pseudorhombohedral compositions of Pb(ZrxTi1-x)O-3 (PZT) are addressed;using a 6% Sr2+ substituted sample with x = 0.550. Sound velocity;measurements reveal a phase transition at T-c similar to 279 K. The;temperature dependence of full width at half maximum of (h00)(pc) peaks;and the unit cell volume also show anomalies around 279 K even though;there is no indication of any change of space group in the synchrotron;x-ray powder diffraction (SXRD) patterns. The neutron powder diffraction;patterns reveal appearance of superlattice peaks below T-c similar to;279 K, confirming the existence of an antiferrodistortive phase;transition. The Rietveld analysis of the room-temperature and;low-temperature SXRD data below T-c shows that the structure corresponds;to single monoclinic phase in the Cm space group while the analysis of;neutron powder diffraction data reveals that the structure of the;ground-state phase below T-c corresponds to the Cc space group. Our;analysis shows that the structural models for the ground-state phase;based on the R3c space group with or without the coexistence of the;room-temperature monoclinic phase in the Cm space group can be rejected.;SOLANKI, RAVINDRA /H-7221-2013; Senyshyn, Anatoliy/C-8267-2014;Senyshyn, Anatoliy/0000-0002-1473-8992;3;0;0;0;3;1098-0121;WOS:000311714600001;;;J;Steinke, N. -J.;Moore, T. A.;Mansell, R.;Bland, J. A. C.;Barnes, C. H. W.;Nonuniversal dynamic magnetization reversal in the Barkhausen-dominated;and mesofrequency regimes;PHYSICAL REVIEW B;86;18;184434;10.1103/PhysRevB.86.184434;NOV 30 2012;2012;Dynamic magnetization reversal in the mesofrequency range is studied by;ac magneto-optical Kerr effect (ac-MOKE) and ac anisotropic;magnetoresistance (ac-AMR) magnetometry in a series of epitaxial and;polycrystalline thin magnetic films. The dynamic coercive field was;found to scale as a power law with scaling exponents <= 1/2 depending on;the ferromagnetic material. In addition, there is a low sweep rate;regime in which the dynamic coercivity reaches a minimum. These findings;are explained in the context of reversal proceeding by motion of a few;domain walls (similar to 1). At dc and low field sweep rates the;reversal proceeds between local pinning sites via Barkhausen avalanches;and the overall reversal speed is strongly dependent on the field sweep;rate. At higher field sweep rates a continuous motion regime is entered;in which the reversal velocity depends linearly on the applied field;sweep rate and only an average pinning force is experienced by the wall.;The fit of the dynamic coercivity vs applied field sweep rate allows the;determination of the average nonlocal pinning field. The nonuniversal;scaling exponent can be explained using recently developed models and;introducing a field rate-dependent number of active domain walls.;Mansell, Rhodri/A-1450-2013;2;0;0;0;2;1098-0121;WOS:000311714700003;;;J;Stoffel, M.;Fagot-Revurat, Y.;Tejeda, A.;Kierren, B.;Nicolaou, A.;Le Fevre, P.;Bertran, F.;Taleb-Ibrahimi, A.;Malterre, D.;Electron-phonon coupling on strained Ge/Si(111)-(5x5) surfaces;PHYSICAL REVIEW B;86;19;195438;10.1103/PhysRevB.86.195438;NOV 30 2012;2012;We investigate the structural and electronic properties of strained;Ge/Si(111)-(5 x 5) surfaces by means of scanning tunneling microscopy;and high-resolution angle-resolved photoemission spectroscopy. The;homogeneous (5 x 5) reconstructed overlayers are characterized by three;electronic surface states, similar to the Si(111)-(7 x 7) surface. The;dispersion of the dangling bond related surface state exhibits the same;periodicity as that of the (5 x 5) reconstruction. Moreover, a careful;analysis of the shape and width of this surface state provides striking;evidence of electron-phonon coupling at low temperatures. By considering;the spectral function within a simple Debye model, we determine both the;Debye energy and the electron-phonon coupling strength. The latter value;is further confirmed by analyzing the temperature-dependent phonon;broadening of the dangling bond related surface state linewidth.;BERTRAN, Francois/B-7515-2008; Tejeda, Antonio/C-4711-2014;BERTRAN, Francois/0000-0002-2416-0514; Tejeda,;Antonio/0000-0003-0125-4603;1;0;0;0;1;1098-0121;WOS:000311715000012;;;J;Turek, I.;Kudrnovsky, J.;Carva, K.;Magnetic anisotropy energy of disordered tetragonal Fe-Co systems from;ab initio alloy theory;PHYSICAL REVIEW B;86;17;174430;10.1103/PhysRevB.86.174430;NOV 30 2012;2012;We present results of systematic fully relativistic first-principles;calculations of the uniaxial magnetic anisotropy energy (MAE) of a;disordered and partially ordered tetragonal Fe-Co alloy using the;coherent potential approximation (CPA). This alloy has recently become a;promising system for thin ferromagnetic films with a perpendicular;magnetic anisotropy. We find that existing theoretical approaches to;homogeneous random bulk Fe-Co alloys, based on a simple virtual crystal;approximation (VCA), overestimate the maximum MAE values obtained in the;CPA by a factor of 4. This pronounced difference is ascribed to the;strong disorder in the minority spin channel of real alloys, which is;neglected in the VCA and which leads to a broadening of the d-like;eigenstates at the Fermi energy and to the reduction of the MAE. The;ordered Fe-Co alloys with a maximum L1(0)-like atomic long-range order;can exhibit high values of the MAE, which, however, get dramatically;reduced by small perturbations of the perfect order.;Carva, Karel/A-3703-2008; Turek, Ilja/G-5553-2014; KUDRNOVSKY, Josef/G-5581-2014;KUDRNOVSKY, Josef/0000-0002-9968-6748;10;0;0;0;10;1098-0121;WOS:000311714600004;;;J;Uppstu, Andreas;Harju, Ari;High-field magnetoresistance revealing scattering mechanisms in graphene;PHYSICAL REVIEW B;86;20;201409;10.1103/PhysRevB.86.201409;NOV 30 2012;2012;We show that the type of charge carrier scattering significantly affects;the high-field magnetoresistance of graphene nanoribbons. This effect;has the potential to be used in identifying the scattering mechanisms in;graphene. The results also provide an explanation for the experimentally;found, intriguing differences in the behavior of the magnetoresistance;of graphene Hall bars placed on different substrates. Additionally, our;simulations indicate that the peaks in the longitudinal resistance tend;to become pinned to fractionally quantized values, as different;transport modes have very different scattering properties.;Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;1;0;0;0;1;1098-0121;WOS:000311715100004;;;J;White, Alexander J.;Sukharev, Maxim;Galperin, Michael;Molecular nanoplasmonics: Self-consistent electrodynamics in;current-carrying junctions;PHYSICAL REVIEW B;86;20;205324;10.1103/PhysRevB.86.205324;NOV 30 2012;2012;We consider a biased molecular junction subjected to an external;time-dependent electromagnetic field. We discuss local field formation;due to both surface plasmon-polariton excitations in the contacts and;the molecular response. Employing realistic parameters we demonstrate;that such self-consistent treatment is crucial for the proper;description of the junction transport characteristics.;White, Alexander/D-8754-2014;White, Alexander/0000-0002-7771-3899;3;0;0;0;3;1098-0121;WOS:000311715100010;;;J;Wierschem, Keola;Kato, Yasuyuki;Nishida, Yusuke;Batista, Cristian D.;Sengupta, Pinaki;Magnetic and nematic orderings in spin-1 antiferromagnets with;single-ion anisotropy;PHYSICAL REVIEW B;86;20;201108;10.1103/PhysRevB.86.201108;NOV 30 2012;2012;We study a spin-1 Heisenberg model with exchange interaction J, uniaxial;single-ion exchange anisotropy D, and Zeeman coupling to a magnetic;field B parallel to the symmetry axis. We compute the (D/J, B/J) quantum;phase diagram for square and simple cubic lattices by combining;analytical and quantum Monte Carlo approaches, and find a transition;between XY antiferromagnetic and ferronematic phases that spontaneously;break the U(1) symmetry of the model. In the language of bosonic gases,;this is a transition between a Bose-Einstein condensate (BEC) of single;bosons and a BEC of pairs. Our work opens up new avenues for measuring;this transition in real magnets.;8;0;0;0;8;1098-0121;WOS:000311715100001;;;J;Wu, Chien-Te;Valls, Oriol T.;Halterman, Klaus;Proximity effects in conical-ferromagnet/superconductor bilayers;PHYSICAL REVIEW B;86;18;184517;10.1103/PhysRevB.86.184517;NOV 30 2012;2012;We present a study of various aspects of proximity effects in F/S;(ferromagnet/superconductor) bilayers, where F has a spiral magnetic;texture such as that found in holmium, erbium, and other materials, and;S is a conventional s-wave superconductor. We numerically solve the;Bogoliubov-de Gennes (BdG) equations self-consistently and use the;solutions to compute physical quantities relevant to the proximity;effects in these bilayers. We obtain the relation between the;superconducting transition temperature T-c and the thicknesses d(F) of;the magnetic layer by solving the linearized BdG equations. We find that;the T-c (d(F)) curves include multiple oscillations. Moreover, the;system may be reentrant not only with d(F), as is the case when the;magnet is uniform, but also with temperature T : the superconductivity;disappears in certain ranges of d(F) or T. The T reentrance reported;here occurs when d(F) is larger than the spatial period of the conical;exchange field. We compute the condensation free energies and entropies;from the full BdG equations and find the results are in agreement with;T-c values obtained by linearization. The inhomogeneous nature of the;magnet makes it possible for all odd triplet pairing components to be;induced. We have investigated their properties and found that, as;compared to the singlet amplitude, both the m = 0 and +/- 1 triplet;components exhibit long-range penetration. For nanoscale bilayers, the;proximity lengths for both layers are also obtained. These lengths;oscillate with d(F) and they are found to be long range on both sides.;These results are shown to be consistent with recent experiments. We;also calculate the reverse proximity effect described by the;three-dimensional local magnetization, and the local density of states,;which reveals important energy-resolved signatures associated with the;proximity effects.;6;0;0;0;6;1098-0121;WOS:000311714700005;;;J;Altarelli, M.;Kurta, R. P.;Vartanyants, I. A.;X-ray cross-correlation analysis and local symmetries of disordered;systems: General theory (vol 82, 104207, 2010);PHYSICAL REVIEW B;86;17;179904;10.1103/PhysRevB.86.179904;NOV 29 2012;2012;1;0;0;0;1;1098-0121;WOS:000311693600006;;;J;Beheshtian, J.;Sadeghi, A.;Neek-Amal, M.;Michel, K. H.;Peeters, F. M.;Induced polarization and electronic properties of carbon-doped boron;nitride nanoribbons;PHYSICAL REVIEW B;86;19;195433;10.1103/PhysRevB.86.195433;NOV 29 2012;2012;The electronic properties of boron nitride nanoribbons (BNNRs) doped;with a line of carbon atoms are investigated using density functional;calculations. By replacing a line of alternating B and N atoms with;carbons, three different configurations are possible depending on the;type of the atoms which bond to the carbons. We found very different;electronic properties for these configurations: (i) the NCB arrangement;is strongly polarized with a large dipole moment having an unexpected;direction, (ii) the BCB and NCN arrangements are nonpolar with zero;dipole moment, (iii) the doping by a carbon line reduces the band gap;regardless of the local arrangement of the borons and the nitrogens;around the carbon line, and (iv) the polarization and energy gap of the;carbon-doped BNNRs can be tuned by an electric field applied parallel to;the carbon line. Similar effects were found when either an armchair or;zigzag line of carbon was introduced.;Sadeghi, Ali/D-1554-2013;8;0;0;0;8;1098-0121;WOS:000311694200006;;;J;Chi, Hang;Kim, Hyoungchul;Thomas, John C.;Su, Xianli;Stackhouse, Stephen;Kaviany, Massoud;Van der Ven, Anton;Tang, Xinfeng;Uher, Ctirad;Configuring pnicogen rings in skutterudites for low phonon conductivity;PHYSICAL REVIEW B;86;19;195209;10.1103/PhysRevB.86.195209;NOV 29 2012;2012;Dominant heat-carrying modes in skutterudites are associated with;vibrations of the pnicogen rings. Apart from filling the structural;cages with foreign species, disrupting the pnicogen ring structure by;substitutional alloying should be an effective approach to reduce;thermal conductivity. In this paper we explore alloying configurations;of pnicogen rings (Sb rings in the case of CoSb3) that yield;particularly low values of the thermal conductivity. We find that IV-VI;double substitution (replacing two Sb atoms with one atom each from the;column IV and column VI elements to achieve an average charge of two Sb;atoms) is a very effective approach. Our ab initio calculations, in;combination with a cluster expansion, have allowed us to identify stable;alloy configurations on the Sb rings. Subsequent molecular and lattice;dynamics simulations on low energy configurations establish the range of;atomic displacement parameters and values of the thermal conductivity.;Theoretical results are in good agreement with our experimental thermal;conductivity values. Combining both approaches of compensated double;substitution and filling of structural cages should be an effective way;of improving the thermoelectric figure of merit of skutterudites.;Su, Xianli/A-9685-2012; Chi, Hang/F-1537-2011; Thomas, John/A-2764-2009; Kim, Hyoungchul/F-2557-2014;Chi, Hang/0000-0002-1299-1150; Thomas, John/0000-0002-3162-0152; Kim,;Hyoungchul/0000-0003-3109-660X;8;0;0;0;8;1098-0121;WOS:000311694200003;;;J;Fortmann, C.;Niemann, C.;Glenzer, S. H.;Theory of x-ray scattering in high-pressure electrides;PHYSICAL REVIEW B;86;17;174116;10.1103/PhysRevB.86.174116;NOV 29 2012;2012;We report on a theoretical model for the calculation of x-ray scattering;from high-pressure electrides. By treating interstitial electrons as;effective anions forming a sublattice within the crystal, we explicitly;account for Bragg reflections from the sublattice as well as for;scattering interferences between the ion lattice and the anion;sublattice. The additional reflections and interferences lead to;significant modifications of the static structure factor as compared to;the pure lattices. Our results are important for accurate calculations;of material properties in the high-pressure phase and allow for direct;experimental verification of electride phases in matter at ultrahigh;pressures through angle-resolved x-ray scattering.;2;0;0;0;2;1098-0121;WOS:000311693600001;;;J;Guclu, Caner;Campione, Salvatore;Capolino, Filippo;Hyperbolic metamaterial as super absorber for scattered fields generated;at its surface;PHYSICAL REVIEW B;86;20;205130;10.1103/PhysRevB.86.205130;NOV 29 2012;2012;We show that hyperbolic metamaterials (HMs) that exhibit hyperbolic;wave-vector dispersion diagrams possess two important features related;to super absorption: The total power scattered by a nanosphere is (i);greatly enhanced when placed at the HM surface, compared to other;material surfaces, and (ii) almost totally directed into the HM. We show;that these two features are peculiar of HM interfaces, and we support;them using a spectral theory study of transverse-electric and magnetic;waves scattered by a subwavelength nanosphere. We analyze the;nanosphere's scattered power absorbed by various substrate;configurations. We also consider various nanosphere materials.;22;0;0;0;22;1098-0121;WOS:000311694300002;;;J;Hebbache, M.;Entanglement of electron spins and geometric phases in the diamond color;center coupled to the P1 center;PHYSICAL REVIEW B;86;19;195316;10.1103/PhysRevB.86.195316;NOV 29 2012;2012;Impurity spins in semiconductors are potential quantum bits.;Entanglement and topological phases are key resources in quantum;computation. We prove that the coupled electron spins carried by a;diamond nitrogen-vacancy color center (NV-) and a single substitutional;nitrogen impurity (P1 center) are entangled in the immediate vicinity of;the level anticrossing that appears in the Zeeman energy diagram at;about 500 G. We also determine the Aharonov-Anandan, Berry, and marginal;geometric phases that can be accumulated by the state vectors of this;spin system when it is magnetically transported around a closed path. At;the resonance where the gap between two energy levels is minimum, the;geometric phases undergo discontinuities, and the entanglement of the;two electron spins is maximal.;2;0;0;0;2;1098-0121;WOS:000311694200004;;;J;Kerdsongpanya, Sit;Alling, Bjorn;Eklund, Per;Effect of point defects on the electronic density of states of ScN;studied by first-principles calculations and implications for;thermoelectric properties;PHYSICAL REVIEW B;86;19;195140;10.1103/PhysRevB.86.195140;NOV 29 2012;2012;We have investigated the effect of defects and impurities on the;electronic density of states of scandium nitride using first-principles;calculations with the generalized gradient approximation and hybrid;functionals for the exchange correlation energy. Our results show that;Sc and N vacancies can introduce asymmetric peaks in the density of;states close to the Fermi level. We also find that the N vacancy states;are sensitive to total electron concentration of the system due to their;possibility for spin polarization. Substitutional point defects shift;the Fermi level in the electronic band according to their valence but do;not introduce sharp features. The energetics and electronic structure of;defect pairs are also studied. By using hybrid functional calculations,;a correct description of the band gap of scandium nitride is obtained.;Our results envisage ways for improving the thermoelectric figure of;merit of ScN by electronic structure engineering through stoichiometry;tuning and doping.;Eklund, Per/B-7677-2011; Alling, Bjorn/I-3193-2012;Eklund, Per/0000-0003-1785-0864; Alling, Bjorn/0000-0001-5863-5605;8;0;0;0;8;1098-0121;WOS:000311694200001;;;J;Kim, Jiseok;Fischetti, Massimo V.;Aboud, Shela;Structural, electronic, and transport properties of silicane nanoribbons;PHYSICAL REVIEW B;86;20;205323;10.1103/PhysRevB.86.205323;NOV 29 2012;2012;Silicane ribbons do not suffer from aromatic dependence of the band gap;making them a more promising candidate for near-term nanoelectronic;application compared to armchair graphene nanoribbons. The structural,;electronic, and transport properties of free-standing sp(3)-hybridized;armchair- and zigzag-edge silicane nanoribbons have been investigated;using ab initio and nonlocal empirical pseudopotential calculations.;Under ambient conditions, two-dimensional silicane sheets will;spontaneously break into stable one-dimensional ribbons similar to;density functional theory studies of graphene ribbons. The calculated;low-field electron mobility and ballistic conductance show a strong edge;dependence, due to differences in the effective mass and momentum;relaxation rates along the two transport directions. The mobility in;zigzag-edge ribbons is found to be approximately twenty times higher;than in armchair-edge ribbons.;7;0;0;0;7;1098-0121;WOS:000311694300004;;;J;Kim, Kyou-Hyun;Payne, David A.;Zuo, Jian-Min;Symmetry of piezoelectric (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (x=0.31);single crystal at different length scales in the morphotropic phase;boundary region;PHYSICAL REVIEW B;86;18;184113;10.1103/PhysRevB.86.184113;NOV 29 2012;2012;We use probes of three different length scales to examine symmetry of (1;- x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) single crystals in the;morphotropic phase boundary (MPB) region at composition x = 0.31;(PMN-31% PT). On the macroscopic scale, x-ray diffraction (XRD) shows a;mixture of strong and weak diffraction peaks of different widths. The;closest match to XRD peak data is made with monoclinic Pm (M-C);symmetry. On the local scale of a few nanometers, convergent beam;electron diffraction (CBED) studies, with a 1.6-nm electron probe,;reveal no obvious symmetry. These CBED experimental patterns can be;approximately matched with simulations based on monoclinic symmetry,;which suggests locally distorted monoclinic structure. A monoclinic Cm;(M-A or M-B)-like symmetry could also be obtained from certain regions;of the crystal by using a larger electron probe size of several tens of;nanometers in diameter. Thus the monoclinic symmetry of single crystal;PMN-31% PT is developed only in parts of the crystal by averaging over;locally distorted structure on the scale of few tens of nanometers. The;macroscopic symmetry observed by XRD is a result of averaging from the;local structure in PMN-31% PT single crystal. The lack of local symmetry;at a few nanometers scale suggests that the polarization switching;results from a change in local displacements, which are not restricted;to specific symmetry planes or directions.;2;0;0;0;2;1098-0121;WOS:000311693900002;;;J;Kossacki, P.;Faugeras, C.;Kuehne, M.;Orlita, M.;Mahmood, A.;Dujardin, E.;Nair, R. R.;Geim, A. K.;Potemski, M.;Circular dichroism of magnetophonon resonance in doped graphene;PHYSICAL REVIEW B;86;20;205431;10.1103/PhysRevB.86.205431;NOV 29 2012;2012;The polarization-resolved Raman-scattering response due to E-2g phonons;in monolayer graphene has been investigated in magnetic fields up to 29;T. The hybridization of the E-2g phonon is only observed with the;fundamental inter-Landau-level excitation (involving the n = 0 Landau;level) and in just one of the two configurations of the circularly;cross-polarized excitation and scattered light. This polarization;anisotropy of the magnetophonon resonance is shown to be inherent to;relatively strongly doped graphene samples with carrier concentrations;typical for graphene deposited on Si/SiO2 substrates.;Dujardin, Erik/A-2748-2010; Raveendran Nair, Rahul/G-5839-2010; Orlita, Milan/H-1130-2014;Dujardin, Erik/0000-0001-7242-9250;;3;0;0;0;3;1098-0121;WOS:000311694300005;;;J;Kostylev, M.;Stashkevich, A. A.;Roussigne, Y.;Grigoryeva, N. A.;Mistonov, A. A.;Menzel, D.;Sapoletova, N. A.;Napolskii, K. S.;Eliseev, A. A.;Lukashin, A. V.;Grigoriev, S. V.;Samarin, S. N.;Microwave properties of Ni-based ferromagnetic inverse opals;PHYSICAL REVIEW B;86;18;184431;10.1103/PhysRevB.86.184431;NOV 29 2012;2012;Investigations of microwave properties of Ni-based inverse ferromagnetic;opal-like film with the [111] axis of the fcc structure along the normal;direction to the film have been carried out in the 2-18 GHz frequency;band. We observed multiple spin wave resonances for the magnetic field;applied perpendicular to the film, i.e., along the [111] axis of this;artificial crystal. For the field applied in the film plane, a broad;band of microwave absorption is observed, which does not contain a fine;structure. The field ranges of the responses observed are quite;different for these two magnetization directions. This suggests a;collective magnetic ground state or shape anisotropy and collective;microwave dynamics for this foam-like material. This result is in;agreement with SQUID measurements of hysteresis loops for the material.;Two different models for this collective behavior are suggested that;satisfactorily explain the major experimental results.;Lukashin, Alexey/F-6746-2013; Mistonov, Alexander/H-2098-2013; Grigoryeva, Natalia/K-2253-2013; Kostylev, Mikhail/H-5214-2014;Mistonov, Alexander/0000-0003-0138-3579; Grigoryeva,;Natalia/0000-0002-9910-6192;;1;0;0;0;1;1098-0121;WOS:000311693900004;;;J;Kvashnin, Y. O.;Khmelevskyi, S.;Kudrnovsky, J.;Yaresko, A. N.;Genovese, L.;Bruno, P.;Noncollinear magnetic ordering in compressed FePd3 ordered alloy: A;first principles study;PHYSICAL REVIEW B;86;17;174429;10.1103/PhysRevB.86.174429;NOV 29 2012;2012;By means of ab initio calculations based on the density functional;theory we investigated the magnetic phase diagram of ordered FePd3 alloy;as a function of external pressure. Considering several magnetic;configurations we concluded that the system under pressure has a;tendency toward noncollinear spin alignment. Analysis of the Heisenberg;exchange parameters J(ij) revealed strong dependence of iron-iron;magnetic couplings on polarization of Pd atoms. To take into account;that effect we built an extended Heisenberg model with higher order;(biquadratic) terms. Minimizing the energy of this Hamiltonian, fully;parametrized using the results of ab initio calculations, we found a;candidate for a ground state of compressed FePd3, which can be seen as;two interpenetrating "triple-Q" phases.;Genovese, Luigi/C-5937-2011; Bruno, Patrick/C-9159-2009; KUDRNOVSKY, Josef/G-5581-2014;Genovese, Luigi/0000-0003-1747-0247; Bruno, Patrick/0000-0002-2574-1943;;KUDRNOVSKY, Josef/0000-0002-9968-6748;1;0;0;0;1;1098-0121;WOS:000311693600004;;;J;Li, Wu;Lindsay, L.;Broido, D. A.;Stewart, Derek A.;Mingo, Natalio;Thermal conductivity of bulk and nanowire Mg2SixSn1-x alloys from first;principles;PHYSICAL REVIEW B;86;17;174307;10.1103/PhysRevB.86.174307;NOV 29 2012;2012;The lattice thermal conductivity (kappa) of the thermoelectric;materials, Mg2Si, Mg2Sn, and their alloys, are calculated for bulk and;nanowires, without adjustable parameters. We find good agreement with;bulk experimental results. For large nanowire diameters, size effects;are stronger for the alloy than for the pure compounds. For example, in;200 nm diameter nanowires kappa is lower than its bulk value by 30%,;20%, and 20% for Mg2Si0.6Sn0.4, Mg2Si, and Mg2Sn, respectively. For;nanowires less than 20 nm thick, the relative decrease surpasses 50%,;and it becomes larger in the pure compounds than in the alloy. At room;temperature, kappa of Mg2SixSn1-x is less sensitive to nanostructuring;size effects than SixGe1-x, but more sensitive than PbTexSe1-x. This;suggests that further improvement of Mg2SixSn1-x as a nontoxic;thermoelectric may be possible.;Lindsay, Lucas/C-9221-2012; Stewart, Derek/B-6115-2008;25;1;0;0;25;1098-0121;WOS:000311693600002;;;J;Niklasson, Anders M. N.;Cawkwell, Marc J.;Fast method for quantum mechanical molecular dynamics;PHYSICAL REVIEW B;86;17;174308;10.1103/PhysRevB.86.174308;NOV 29 2012;2012;As the processing power available for scientific computing grows,;first-principles Born-Oppenheimer molecular dynamics simulations are;becoming increasingly popular for the study of a wide range of problems;in materials science, chemistry, and biology. Nevertheless, the;computational cost of Born-Oppenheimer molecular dynamics still remains;prohibitively large for many potential applications. Here we show how to;avoid a major computational bottleneck: the self-consistent-field;optimization prior to force calculations. The optimization-free quantum;mechanical molecular dynamics method gives trajectories that are almost;indistinguishable from an "exact" microcanonical Born-Oppenheimer;molecular dynamics simulation even when low-prefactor linear scaling;sparse matrix algebra is used. Our findings show that the computational;gap between classical and quantum mechanical molecular dynamics;simulations can be significantly reduced.;4;0;0;0;4;1098-0121;WOS:000311693600003;;;J;Ong, Zhun-Yong;Fischetti, Massimo V.;Theory of interfacial plasmon-phonon scattering in supported graphene;(vol 86, 165422, 2012);PHYSICAL REVIEW B;86;19;199904;10.1103/PhysRevB.86.199904;NOV 29 2012;2012;Ong, Zhun-Yong/B-9486-2013;Ong, Zhun-Yong/0000-0003-2668-6453;6;0;0;0;6;1098-0121;WOS:000311694200007;;;J;Per, Manolo C.;Snook, Ian K.;Russo, Salvy P.;Efficient calculation of unbiased expectation values in diffusion;quantum Monte Carlo;PHYSICAL REVIEW B;86;20;201107;10.1103/PhysRevB.86.201107;NOV 29 2012;2012;Despite the proven utility of quantum Monte Carlo methods in addressing;the quantum many-body problem, many important observables are difficult;to calculate due to the presence of large, and sometimes divergent,;statistical errors. The present state of the art allows the construction;of renormalized estimators which result in finite variances, but which;invariably include some systematic bias. We present a simple method for;calculating unbiased expectation values of local operators in the;diffusion quantum Monte Carlo method which is applicable to both bare;and renormalized estimators, allowing the accurate calculation of;important properties such as forces.;snook, ian/A-3427-2009; Per, Manolo/C-3680-2011;1;0;0;0;1;1098-0121;WOS:000311694300001;;;J;Simonson, J. W.;Smith, G. J.;Post, K.;Pezzoli, M.;Kistner-Morris, J. J.;McNally, D. E.;Hassinger, J. E.;Nelson, C. S.;Kotliar, G.;Basov, D. N.;Aronson, M. C.;Magnetic and structural phase diagram of CaMn2Sb2;PHYSICAL REVIEW B;86;18;184430;10.1103/PhysRevB.86.184430;NOV 29 2012;2012;On the basis of magnetic, transport, and optical measurements performed;on single crystals, we report CaMn2Sb2 to be an antiferromagnetic;insulator that exhibits weak ferromagnetic order above the Neel;temperature. Magnetic susceptibility measurements reveal the magnitude;of the high-temperature Curie-Weiss moment to be only half as large as;the ground-state ordered moment, while electronic-structure calculations;based on crystallographic measurements suggest a crystal-field-induced;spin-state transition does not occur. The antiferromagnetic state is;relatively insensitive to both doping and modest pressures, while the;ferromagnetism can be readily tuned by either. Infrared transmission and;pressure-dependent resistivity measurements suggest proximity to an;electronic delocalization transition. We suggest the ferromagnetic state;may be the signature of magnetic polarons.;1;1;0;0;1;1098-0121;WOS:000311693900003;;;J;Stishov, Sergei M.;Petrova, Alla E.;Sidorov, Vladimir A.;Menzel, Dirk;Self-doping effects in cobalt silicide CoSi: Electrical, magnetic,;elastic, and thermodynamic properties (vol 86, 064433, 2012);PHYSICAL REVIEW B;86;17;179903;10.1103/PhysRevB.86.179903;NOV 29 2012;2012;0;0;0;0;0;1098-0121;WOS:000311693600005;;;J;Thede, M.;Xiao, F.;Baines, Ch.;Landee, C.;Morenzoni, E.;Zheludev, A.;Ordering in weakly coupled random singlet spin chains;PHYSICAL REVIEW B;86;18;180407;10.1103/PhysRevB.86.180407;NOV 29 2012;2012;The influence of bond randomness on long-range magnetic ordering in the;weakly coupled S = 1/2 antiferromagnetic spin chain materials;Cu(py)(2)(Cl1-xBrx)(2) is studied by muon spin rotation and bulk;measurements. Disorder is found to have a strong effect on the ordering;temperature T-N, and an even stronger one on the saturation;magnetization m(0), but considerably more so in the effectively;lower-dimensional Br-rich materials. The observed behavior is attributed;to random singlet ground states of individual spin chains, but remains;in contradiction with chain mean-field theory [Joshi and Yang, Phys.;Rev. B 67, 174403 (2003)] predictions. In this context, we discuss the;possibility of a universal distribution of ordered moments in the weakly;coupled random singlet chains model.;Thede, Matthias/L-2975-2013;4;0;0;0;4;1098-0121;WOS:000311693900001;;;J;Usov, V.;Stoyanov, S.;Coileain, C. O.;Toktarbaiuly, O.;Shvets, I. V.;Antiband instability on vicinal Si(111) under the condition of;diffusion-limited sublimation;PHYSICAL REVIEW B;86;19;195317;10.1103/PhysRevB.86.195317;NOV 29 2012;2012;In this paper, we investigate the antiband instability on vicinal;Si(111) surfaces with different angles of misorientation. It is known;that prolonged direct current-annealing of Si(111) results in the;formation of antibands; i.e., the step bunches with the opposite slope;to the primary bunches. We provide a theoretical description of antiband;formation via the evolution of the atomic steps' shape. We also derive a;criterion for the onset of the antiband instability under the conditions;of sublimation controlled by slow adatom surface diffusion. We examine;this criterion experimentally by studying the initial stage of the;antiband formation at a constant temperature of 1270 degrees C while;systematically varying the applied electromigration field. The;experiment strongly supports the validity of the derived theoretical;criterion and indicates the importance of accounting for the factor of;critical field in the theoretical modeling of step bunching or antiband;instabilities. Deduced from the comparison of theory and experiment, the;Si surface atoms' effective charge cannot exceed double the elementary;charge, set by the lower limit of kinetic characteristic length d(s) =;0.3 nm. Using d(s) = 1.7 - 4.5 nm draws values of the effective charge;in line with the values reported in earlier studies.;Shvets, Igor/J-8710-2013;0;0;0;0;0;1098-0121;WOS:000311694200005;;;J;Weber, Cedric;Mila, Frederic;Anticollinear magnetic order induced by impurities in the frustrated;Heisenberg model of pnictides;PHYSICAL REVIEW B;86;18;184432;10.1103/PhysRevB.86.184432;NOV 29 2012;2012;We present Monte Carlo simulations for a classical antiferromagnetic;Heisenberg model with both nearest (J(1)) and next-nearest (J(2));exchange couplings on the square lattice in the presence of nonmagnetic;impurities. We show that the order-by-disorder entropy selection,;associated with the Ising-like phase transition that appears for;J(2)/J(1) > 1/2 in the pure spin model, is quenched at low temperature;due to the presence of nonmagnetic impurities. Evidence that a new;competing order is stabilized around the impurities and in turn induces;a reentrance phase transition is reported. Implications for local;magnetic measurement of the parent compound of iron pnictides are;briefly discussed.;Weber, Cedric/D-5027-2014;Weber, Cedric/0000-0002-6989-2700;4;0;0;0;4;1098-0121;WOS:000311693900005;;;J;Weston, L.;Cui, X. Y.;Delley, B.;Stampfl, C.;Band offsets and polarization effects in wurtzite ZnO/Mg0.25Zn0.75O;superlattices from first principles;PHYSICAL REVIEW B;86;20;205322;10.1103/PhysRevB.86.205322;NOV 29 2012;2012;Using first-principles calculations, we investigate the band offsets,;built-in electric fields, and band gaps of (0001)-oriented wurtzite;ZnO/Mg0.25Zn0.75O superlattices, including the dependence on;superlattice geometry and strain. Significant built-in electric fields;form inside the quantum-well region that are found to be tunable over;the range 0.24 MV/cm <= E-w <= 0.63 MV/cm, and potentially up to 1MV/cm;by varying the relative width of the well and barrier regions. The;valence band offset at the ZnO/Mg0.25Zn0.75O interface is calculated to;be 0.25-0.26 eV which, in contrast to the "common anion rule," is a;significant portion of the total band offset, and this is in support of;recent experiment. Calculated values for the valence band offset were;found to be insensitive to variations in superlattice geometry and;strain. The band gap of the superlattice is determined by the competing;effects of quantum confinement and the quantum-confined Stark effect,;with the former being more dominant for the systems investigated. These;findings will be useful in the design and optimization of ZnO/MgxZn1-xO;superlattices for electronics and optoelectronics applications.;Delley, Bernard/E-1336-2014;Delley, Bernard/0000-0002-7020-2869;3;0;1;0;4;1098-0121;WOS:000311694300003;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;PHYSICAL REVIEW B;86;19;195141;10.1103/PhysRevB.86.195141;NOV 29 2012;2012;We perform realistic first-principles calculations of iron chalcogenides;and ruthenate-based materials to identify experimental signatures of;Hund's-coupling-induced correlations in these systems. We find that FeTe;and KxFe2-yAs2 display unusual orbital-dependent fractional power-law;behavior in their quasiparticle self-energy and optical conductivity, a;phenomenon first identified in SrRuO3. Strong incoherence in the;paramagnetic state of these materials results in electronic states;hidden to angle-resolved photoemission spectroscopy which reemerge at;low temperatures. We identify the effective low-energy Hamiltonian;describing these systems and show that these anomalies are not;controlled by the proximity to a quantum critical point but result from;coexistence of fast quantum mechanical orbital fluctuations and slow;spin fluctuations.;Yin, Zhiping/G-3949-2012;Yin, Zhiping/0000-0001-8679-5251;10;0;0;0;10;1098-0121;WOS:000311694200002;;;J;Kumar, A.;Fennie, C. J.;Rabe, K. M.;
7:2:21:31     Static dielectric response and polar phonons of Ba(Mn1/3Nb2/3)O-3 and Ba(Ni1/3Nb2/3)O-3 complex perovskites
DOI:10.1016/j.commatsci.2013.07.044  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2013
  TC:0  AU: Dai, Jian-Qing;Zhang, Hu;Song, Yu-Min;
7:2:21:32     Effect of site-disorder on magnetism and magneto-structural coupling in gallium ferrite: A first-principles study (vol 111, 043915, 2012)
DOI:10.1063/1.4704694  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Roy, Amritendu;Prasad, Rajendra;Auluck, Sushil;Garg, Ashish;
7:2:21:33     Does a Heisenberg Hamiltonian describe magnetic interactions in a MnSi film properly?
DOI:10.1016/j.jmmm.2009.03.007  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:2  AU: Hortamani, M.;Sandratskii, L. M.;Mertig, I.;
7:2:22:1     Full field electron spectromicroscopy applied to ferroelectric materials
DOI:10.1063/1.4801968  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:9  AU: Barrett, N.;Rault, J. E.;Wang, J. L.;Mathieu, C.;Locatelli, A.;Mentes, T. O.;Nino, M. A.;Fusil, S.;Bibes, M.;Barthelemy, A.;Sando, D.;Ren, W.;Prosandeev, S.;Bellaiche, L.;Vilquin, B.;Petraru, A.;Krug, I. P.;Schneider, C. M.;
7:2:22:2     Polarization dependence of Schottky barrier heights at interfaces of ferroelectrics determined by photoelectron spectroscopy
DOI:10.1103/PhysRevB.86.094105  JN:PHYSICAL REVIEW B  PY:2012
  TC:13  AU: Chen, Feng;Klein, Andreas;
7:2:22:3     Polarization-Control of the Potential Barrier at the Electrode Interfaces in Epitaxial Ferroelectric Thin Films
DOI:10.1021/am405508k  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:12  AU: Pintilie, Ioana;Teodorescu, Cristian Mihail;Ghica, Corneliu;Chirila, Cristina;Boni, Andra Georgia;Hrib, Luminita;Pasuk, Iuliana;Negrea, Raluca;Apostol, Nicoleta;Pintilie, Lucian;
7:2:22:4     Charge transfer and band bending at Au/Pb(Zr0.2Ti0.8)O-3 interfaces investigated by photoelectron spectroscopy
DOI:10.1016/j.apsusc.2013.02.056  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:17  AU: Apostol, Nicoleta G.;Stoflea, Laura E.;Lungu, George A.;Chirila, Cristina;Trupina, Lucian;Negrea, Raluca F.;Ghica, Corneliu;Pintilie, Lucian;Teodorescu, Cristian M.;
7:2:22:5     Selective adsorption of contaminants on Pb(Zr,Ti)O-3 surfaces shown by X-ray photoelectron spectroscopy
DOI:10.1039/c4ta02660h  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:4  AU: Stoflea, Laura Elena;Apostol, Nicoleta Georgiana;Trupina, Lucian;Teodorescu, Cristian Mihail;
7:2:22:6     Schottky barrier versus surface ferroelectric depolarization at Cu/Pb(Zr, Ti)O-3 interfaces
DOI:10.1007/s10853-014-8041-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:5  AU: Stoflea, Laura E.;Apostol, Nicoleta G.;Chirila, Cristina;Trupina, Lucian;Negrea, Raluca;Pintilie, Lucian;Teodorescu, Cristian M.;
7:2:22:7     Interface electronic structure in a metal/ferroelectric heterostructure under applied bias
DOI:10.1103/PhysRevB.87.155146  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Rault, J. E.;Agnus, G.;Maroutian, T.;Pillard, V.;Lecoeur, Ph.;Niu, G.;Vilquin, B.;Silly, M. G.;Bendounan, A.;Sirotti, F.;Barrett, N.;
7:2:22:8     Thickness-Dependent Polarization of Strained BiFeO3 Films with Constant Tetragonality
DOI:10.1103/PhysRevLett.109.267601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:10  AU: Rault, J. E.;Ren, W.;Prosandeev, S.;Lisenkov, S.;Sando, D.;Fusil, S.;Bibes, M.;Barthelemy, A.;Bellaiche, L.;Barrett, N.;
7:2:22:9     Polarization Sensitive Surface Band Structure of Doped BaTiO3(001)
DOI:10.1103/PhysRevLett.111.127602  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Rault, J. E.;Dionot, J.;Mathieu, C.;Feyer, V.;Schneider, C. M.;Geneste, G.;Barrett, N.;
7:2:22:10     X-ray photoelectron diffraction study of relaxation and rumpling of ferroelectric domains in BaTiO3(001)
DOI:10.1103/PhysRevB.87.184116  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Pancotti, Alexandre;Wang, Jiale;Chen, Peixuan;Tortech, Ludovic;Teodorescu, Cristian-Mihail;Frantzeskakis, Emmanouil;Barrett, Nicholas;
7:2:22:11     Coexistence of piezoelectricity and electric conduction in oxygen-deficient NaNbO3-delta sub-micron cubes
DOI:10.1016/j.mseb.2013.12.002  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:0  AU: Yun, B. K.;Park, Y. K.;Kang, P. G.;Jung, J. H.;Lee, N.;Jo, W.;Shin, H.;Yoon, S.;
7:2:22:12     Band bending at free Pb(Zr,Ti)O-3 surfaces analyzed spectroscopy by X-ray photoelectron
DOI:10.1016/j.mseb.2013.02.007  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:13  AU: Apostol, Nicoleta G.;Stoflea, Laura E.;Lungu, George A.;Tache, Cristian A.;Popescu, Dana G.;Pintilie, Lucian;Teodorescu, Cristian M.;
7:2:22:13     Extrinsic screening of ferroelectric domains in Pb(Zr0.48Ti0.52)O-3
DOI:10.1063/1.3523359  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Krug, I.;Barrett, N.;Petraru, A.;Locatelli, A.;Mentes, T. O.;Nino, M. A.;Rahmanizadeh, K.;Bihlmayer, G.;Schneider, C. M.;
7:2:22:14     Band bending in Au/Pb(Zr,Ti)O-3 investigated by X-ray photoelectron spectroscopy: Dependence on the initial state of the film
DOI:10.1016/j.tsf.2013.04.092  JN:THIN SOLID FILMS  PY:2013
  TC:11  AU: Apostol, Nicoleta G.;Stoflea, Laura E.;Lungu, George A.;Tanase, Liviu C.;Chirila, Cristina;Frunza, Ligia;Pintilie, Lucian;Teodorescu, Cristian M.;
7:2:22:15     Probing ferroelectricity in PbZr0.2Ti0.8O3 with polarized soft x rays
DOI:10.1103/PhysRevB.82.140103  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Arenholz, E.;van der Laan, G.;Fraile-Rodriguez, A.;Yu, P.;He, Q.;Ramesh, R.;
7:2:22:16     Ultrathin limit and dead-layer effects in local polarization switching of BiFeO3
DOI:10.1103/PhysRevB.85.014119  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Maksymovych, Peter;Huijben, Mark;Pan, Minghu;Jesse, Stephen;Balke, Nina;Chu, Ying-Hao;Chang, Hye Jung;Borisevich, Albina Y.;Baddorf, Arthur P.;Rijnders, Guus;Blank, Dave H. A.;Ramesh, Ramamoorthy;Kalinin, Sergei V.;
7:2:22:17     Time-resolved photoemission spectroscopy on a metal/ferroelectric heterostructure
DOI:10.1103/PhysRevB.88.155107  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Rault, J. E.;Agnus, G.;Maroutian, T.;Pillard, V.;Lecoeur, Ph;Niu, G.;Vilquin, B.;Silly, M. G.;Bendounan, A.;Sirotti, F.;Barrett, N.;
7:2:22:18     Screening of ferroelectric domains on BaTiO3(001) surface by ultraviolet photo-induced charge and dissociative water adsorption
DOI:10.1063/1.4748330  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Wang, J. L.;Vilquin, B.;Barrett, N.;
7:2:22:19     Epitaxial ferromagnetic samarium and samarium silicide synthesized on Si(001)
DOI:10.1007/s10853-012-6672-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:13  AU: Costescu, Ruxandra M.;Gheorghe, Nicoleta G.;Husanu, Marius A.;Lungu, George A.;Macovei, Dan;Pintilie, Ioana;Popescu, Dana G.;Teodorescu, Cristian M.;
7:2:22:20     Persistence of Surface Domain Structures for a Bulk Ferroelectric above T-C
DOI:10.1103/PhysRevLett.108.087602  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:8  AU: Hoefer, A.;Fechner, M.;Duncker, K.;Hoelzer, M.;Mertig, I.;Widdra, W.;
7:2:22:21     Direct spectroscopic evidence of charge reversal at the Pb(Zr0.2Ti0.8)O-3/La0.7Sr0.3MnO3 heterointerface
DOI:10.1103/PhysRevB.83.020103  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Wu, Chung-Lin;Lee, Pei-Wei;Chen, Yi-Chun;Chang, Lo-Yueh;Chen, Chia-Hao;Liang, Chen-Wei;Yu, Pu;He, Qing;Ramesh, R.;Chu, Ying-Hao;
7:2:22:22     Polarity-dependent kinetics of ferroelectric switching in epitaxial BiFeO3(111) capacitors
DOI:10.1063/1.3609235  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Kim, T. H.;Baek, S. H.;Yang, S. M.;Kim, Y. S.;Jeon, B. C.;Lee, D.;Chung, J. -S.;Eom, C. B.;Yoon, J. -G.;Noh, T. W.;
7:2:22:23     Doping-induced phase transitions in ferroelectric BaTiO3 from first-principles calculations
DOI:10.1103/PhysRevB.86.214103  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;
7:2:22:24     Structure, reactivity, electronic configuration and magnetism of samarium atomic layers deposited on Si(001) by molecular beam epitaxy
DOI:10.1016/j.apsusc.2012.08.016  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:6  AU: Gheorghe, Nicoleta G.;Lungu, George A.;Husanu, Marius A.;Costescu, Ruxandra M.;Macovei, Dan;Teodorescu, Cristian M.;
7:2:22:25     Finite element method simulation of the domain growth kinetics in single-crystal LiTaO3: Role of surface conductivity
DOI:10.1063/1.3623762  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Brugere, Antoine;Gidon, S.;Gautier, Brice;
7:2:22:26     Atomic structure and reactivity of ferromagnetic Fe deposited on Si(001)
DOI:10.1007/s10853-011-5963-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:10  AU: Gheorghe, Nicoleta G.;Husanu, Marius A.;Lungu, George A.;Costescu, Ruxandra M.;Macovei, Dan;Teodorescu, Cristian M.;
7:2:22:27     Heterojunction band offsets and dipole formation at BaTiO3/SrTiO3 interfaces
DOI:10.1063/1.4829695  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Balaz, Snjezana;Zeng, Zhaoquan;Brillson, Leonard J.;
7:2:22:28     Thickness dependence of switching time and coercive field in ferroelectric thin films
DOI:10.1063/1.3576110  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Alrub, Ahmad Musleh;Ong, Lye-Hock;
7:2:23:1     Thermally activated avalanches: Jamming and the progression of needle domains
DOI:10.1103/PhysRevB.83.104109  JN:PHYSICAL REVIEW B  PY:2011
  TC:38  AU: Salje, E. K. H.;Ding, X.;Zhao, Z.;Lookman, T.;Saxena, A.;
7:2:23:2     High Junction and Twin Boundary Densities in Driven Dynamical Systems
DOI:10.1002/adma.201200986  JN:ADVANCED MATERIALS  PY:2012
  TC:17  AU: Ding, X.;Zhao, Z.;Lookman, T.;Saxena, A.;Salje, E. K. H.;
7:2:23:3     Dynamically strained ferroelastics: Statistical behavior in elastic and plastic regimes
DOI:10.1103/PhysRevB.87.094109  JN:PHYSICAL REVIEW B  PY:2013
  TC:10  AU: Ding, X.;Lookman, T.;Zhao, Z.;Saxena, A.;Sun, J.;Salje, E. K. H.;
7:2:23:4     Mechanical Loss in Multiferroic Materials at High Frequencies: Friction and the Evolution of Ferroelastic Microstructures
DOI:10.1002/adma.201300655  JN:ADVANCED MATERIALS  PY:2013
  TC:12  AU: Zhao, Z.;Ding, X.;Lookman, T.;Sun, J.;Salje, E. K. H.;
7:2:23:5     Avalanche criticality in the martensitic transition of Cu67.64Zn16.71Al15.65 shape-memory alloy: A calorimetric and acoustic emission study
DOI:10.1103/PhysRevB.81.174102  JN:PHYSICAL REVIEW B  PY:2010
  TC:33  AU: Gallardo, Maria Carmen;Manchado, Julia;Romero, Francisco Javier;del Cerro, Jaime;Salje, Ekhard K. H.;Planes, Antoni;Vives, Eduard;Romero, Ricardo;Stipcich, Marcelo;
7:2:23:6     The noise of the needle: Avalanches of a single progressing needle domain in LaAlO3
DOI:10.1063/1.3460170  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:28  AU: Harrison, Richard J.;Salje, Ekhard K. H.;
7:2:23:7     Simulating acoustic emission: The noise of collapsing domains
DOI:10.1103/PhysRevB.90.064103  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Salje, E. K. H.;Wang, X.;Ding, X.;Sun, J.;
7:2:23:8     How to generate high twin densities in nano-ferroics: Thermal quench and low temperature shear
DOI:10.1063/1.4724192  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Salje, E. K. H.;Ding, X.;Zhao, Z.;Lookman, T.;
7:2:23:9     High frequency elastic losses in LaAlO3 and its importance for LaAlO3/SrTiO3 heterojunctions
DOI:10.1063/1.3622305  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Salje, Ekhard K. H.;Carpenter, Michael A.;
7:2:23:10     Ferroic switching, avalanches, and the Larkin length: Needle domains in LaAlO3
DOI:10.1063/1.3650475  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Harrison, Richard J.;Salje, Ekhard K. H.;
7:2:23:11     Strain rate dependence of twinning avalanches at high speed impact
DOI:10.1063/1.4873520  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zhang, L.;Salje, E. K. H.;Ding, X.;Sun, J.;
7:2:23:12     Statistical Similarity between the Compression of a Porous Material and Earthquakes
DOI:10.1103/PhysRevLett.110.088702  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:22  AU: Baro, Jordi;Corral, Alvaro;Illa, Xavier;Planes, Antoni;Salje, Ekhard K. H.;Schranz, Wilfried;Soto-Parra, Daniel E.;Vives, Eduard;
7:2:23:13     Localizing sources of acoustic emission during the martensitic transformation
DOI:10.1103/PhysRevB.89.214118  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Niemann, R.;Kopecek, J.;Heczko, O.;Romberg, J.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;
7:2:23:14     Local Symmetry Breaking in the Bulk and in Domain Boundaries: Breit-Wigner Damping of Phonons and Acoustic Resonances
DOI:10.1080/00150193.2012.678152  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Salje, E. K. H.;Carpenter, M. A.;
7:2:23:15     Dynamic heat flux experiments in Cu67.64Zn16.71Al15.65: Separating the time scales of fast and ultra-slow kinetic processes in martensitic transformations
DOI:10.1063/1.3609239  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:14  AU: Romero, F. J.;Manchado, J.;Martin-Olalla, J. M.;Gallardo, M. C.;Salje, E. K. H.;
7:2:23:16     Noise and finite size effects in multiferroics with strong elastic interactions
DOI:10.1063/1.4802787  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Salje, E. K. H.;Ding, X.;Zhao, Z.;
7:2:23:17     Imaging the dynamics of martensitic transitions using acoustic emission
DOI:10.1103/PhysRevB.84.060101  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Vives, Eduard;Soto-Parra, Daniel;Manosa, Lluis;Romero, Ricardo;Planes, Antoni;
7:2:23:18     Simultaneous detection of acoustic emission and Barkhausen noise during the martensitic transition of a Ni-Mn-Ga magnetic shape-memory alloy
DOI:10.1103/PhysRevB.88.174108  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Baro, Jordi;Dixon, Steve;Edwards, Rachel S.;Fan, Yichao;Keeble, Dean S.;Manosa, Lluis;Planes, Antoni;Vives, Eduard;
7:2:23:19     Bimodal domain configuration and wedge formation in tetragonal Pb[Zr1-xTix]O-3 ferroelectrics
DOI:10.1016/j.commatsci.2013.07.020  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: Schmitt, Ljubomira Ana;Schrade, David;Kungl, Hans;Xu, Bai-Xiang;Mueller, Ralf;Hoffmann, Michael J.;Kleebe, Hans-Joachim;Fuess, Hartmut;
7:2:23:20     Tuning avalanche criticality: Acoustic emission during the martensitic transformation of a compressed Ni-Mn-Ga single crystal
DOI:10.1103/PhysRevB.86.214101  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;
7:2:23:21     Dynamics of stress-induced domain wall motion
DOI:10.1103/PhysRevB.85.144411  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Bryan, M. T.;Dean, J.;Allwood, D. A.;
7:2:23:22     Magnetization dynamics of a CrO2 grain studied by micro-Hall magnetometry
DOI:10.1063/1.3467870  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Das, P.;Porrati, F.;Wirth, S.;Bajpai, A.;Huth, M.;Ohno, Y.;Ohno, H.;Mueller, J.;
7:2:23:23     On the influence of nanometer-thin antiferromagnetic surface layer on ferromagnetic CrO2
DOI:10.1063/1.4751350  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Das, P.;Bajpai, A.;Ohno, Y.;Ohno, H.;Mueller, J.;
7:2:23:24     Direct Measurement of Microstructural Avalanches during the Martensitic Transition of Cobalt Using Coherent X-Ray Scattering
DOI:10.1103/PhysRevLett.107.015702  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:4  AU: Sanborn, Christopher;Ludwig, Karl F.;Rogers, Michael C.;Sutton, Mark;
7:2:23:25     Rupture Cascades in a Discrete Element Model of a Porous Sedimentary Rock
DOI:10.1103/PhysRevLett.112.065501  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:3  AU: Kun, Ferenc;Varga, Imre;Lennartz-Sassinek, Sabine;Main, Ian G.;
7:2:23:26     Multiple phase transitions found in a magnetic Heusler alloy and thermodynamics of their magnetic internal energy
DOI:10.1103/PhysRevB.81.174405  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Armstrong, Jason N.;Felske, James D.;Chopra, Harsh Deep;
7:2:23:27     Effect of thermal and mechanical cycling on the elastic and dissipative energy in CuAl(11.5wt%)Ni(5.0wt%) shape memory alloy
DOI:10.1016/j.jallcom.2012.06.108  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Elrasasi, T. Y.;Dobroka, M. M.;Daroczi, L.;Beke, D. L.;
7:2:23:28     Acoustic emission in martensitic transformations
DOI:10.1016/j.jallcom.2011.10.082  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Planes, Antoni;Manosa, Lluis;Vives, Eduard;
7:2:23:29     Acoustic Emission Monitoring of the Syracuse Athena Temple: Scale Invariance in the Timing of Ruptures
DOI:10.1103/PhysRevLett.106.108503  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:9  AU: Niccolini, G.;Carpinteri, A.;Lacidogna, G.;Manuello, A.;
7:2:23:30     Damage-Cluster Distributions and Size Effect on Strength in Compressive Failure
DOI:10.1103/PhysRevLett.108.225502  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:11  AU: Girard, Lucas;Weiss, Jerome;Amitrano, David;
7:2:23:31     Dynamics in the Sherrington-Kirkpatrick Ising spin glass at and above T-g
DOI:10.1103/PhysRevB.84.054442  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Billoire, Alain;Campbell, I. A.;
7:2:23:32     Universal Critical Dynamics in High Resolution Neuronal Avalanche Data
DOI:10.1103/PhysRevLett.108.208102  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:33  AU: Friedman, Nir;Ito, Shinya;Brinkman, Braden A. W.;Shimono, Masanori;DeVille, R. E. Lee;Dahmen, Karin A.;Beggs, John M.;Butler, Thomas C.;
7:2:23:33     Temporal and Spacial Evolution of Bursts in Creep Rupture
DOI:10.1103/PhysRevLett.111.084302  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Danku, Zsuzsa;Kun, Ferenc;
7:2:24:1     Photochemical Reactivity of Titania Films on BaTiO3 Substrates: Origin of Spatial Selectivity
DOI:10.1021/cm1018025  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:35  AU: Burbure, Nina V.;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:2     Spatially selective visible light photocatalytic activity of TiO2/BiFeO3 heterostructures
DOI:10.1039/c0jm04313c  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:33  AU: Zhang, Yiling;Schultz, Andrew M.;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:3     Heterostructured Ceramic Powders for Photocatalytic Hydrogen Production: Nanostructured TiO2 Shells Surrounding Microcrystalline (Ba,Sr)TiO3 Cores
DOI:10.1111/j.1551-2916.2012.05076.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:33  AU: Li, Li;Rohrer, Gregory S.;Salvador, Paul A.;
7:2:24:4     Effect of Crystal and Domain Orientation on the Visible-Light Photochemical Reduction of Ag on BiFeO3
DOI:10.1021/am200127c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2011
  TC:16  AU: Schultz, Andrew M.;Zhang, Yiling;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:5     Photochemical Reactivity of Titania Films on BaTiO3 Substrates: Influence of Titania Phase and Orientation
DOI:10.1021/cm1018019  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:24  AU: Burbure, Nina V.;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:6     Combinatorial substrate epitaxy: A high-throughput method for determining phase and orientation relationships and its application to BiFeO3/TiO2 heterostructures
DOI:10.1016/j.actamat.2012.07.060  JN:ACTA MATERIALIA  PY:2012
  TC:13  AU: Zhang, Yiling;Schultz, Andrew M.;Li, Li;Chien, Harry;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:7     Composition Dependence of the Photochemical reduction of Ag by Ba1-xSrxTiO3
DOI:10.1021/cm100718t  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:19  AU: Bhardwaj, Abhilasha;Burbure, Nina V.;Gamalski, Andrew;Rohrer, Gregory S.;
7:2:24:8     Composition dependence of the photochemical reduction of Ag+ by as-grown Pb(ZrxTi1-x)O-3 films on indium tin oxide electrode
DOI:10.1063/1.4819490  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Zhang, Man;Jiang, Chunxiang;Dong, Wen;Zheng, Fengang;Fang, Liang;Su, Xiaodong;Shen, Mingrong;
7:2:24:9     Identifying Potential BO2 Oxide Polymorphs for Epitaxial Growth Candidates
DOI:10.1021/am4059149  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:4  AU: Mehta, Prateek;Salvador, Paul A.;Kitchin, John R.;
7:2:24:10     Controlling Polarization Dependent Reactions to Fabricate Multi-Component Functional Nanostructures
DOI:10.1002/adfm.201101673  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:9  AU: Conklin, David;Park, Tae-Hong;Nanayakkara, Sanjini;Therien, Michael J.;Bonnell, Dawn A.;
7:2:24:11     BiFeO3/La0.7Sr0.3MnO3 heterostructures deposited on spark plasma sintered LaAlO3 substrates
DOI:10.1063/1.4867021  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Pravarthana, D.;Trassin, M.;Chu, Jiun Haw;Lacotte, M.;David, A.;Ramesh, R.;Salvador, P. A.;Prellier, W.;
7:2:24:12     Enhanced Visible-Photocatalytic Activity of Anodic TiO2 Nanotubes Film via Decoration with CuInSe2 Nanocrystals
DOI:10.1021/am403264q  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:4  AU: Liao, Yulong;Zhang, Huaiwu;Zhong, Zhiyong;Jia, Lijun;Bai, Feiming;Li, Jie;Zhong, Peng;Chen, Hua;Zhang, Jin;
7:2:24:13     TiO2/Ferroelectric Heterostructures as Dynamic Polarization-Promoted Catalysts for Photochemical and Electrochemical Oxidation of Water
DOI:10.1103/PhysRevLett.112.196102  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:2  AU: Lee, Jun Hee;Selloni, Annabella;
7:2:24:14     Interface control of surface photochemical reactivity in ultrathin epitaxial ferroelectric films
DOI:10.1063/1.4802885  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Chen, Jason;Lu, Haidong;Liu, Heng-Jui;Chu, Ying-Hao;Dunn, Steve;Ostrikov, Kostya (Ken);Gruverman, Alexei;Valanoor, Nagarajan;
7:2:24:15     Heterostructured (Ba,Sr)TiO3/TiO2 core/shell photocatalysts: Influence of processing and structure on hydrogen production
DOI:10.1016/j.ijhydene.2013.03.130  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2013
  TC:12  AU: Li, Li;Liu, Xuan;Zhang, Yiling;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:16     Eutaxial growth of hematite Fe2O3 films on perovskite SrTiO3 polycrystalline substrates
DOI:10.1016/j.tsf.2013.09.073  JN:THIN SOLID FILMS  PY:2013
  TC:7  AU: Schultz, Andrew M.;Zhu, Yisi;Bojarski, Stephanie A.;Rohrer, Gregory S.;Salvador, Paul A.;
7:2:24:17     Orientation and Phase Relationships between Titania Films and Polycrystalline BaTiO3 Substrates as Determined by Electron Backscatter Diffraction Mapping
DOI:10.1111/j.1551-2916.2010.03878.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Burbure, Nina V.;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:18     Growth of Ca2MnO4 Ruddlesden-Popper structured thin films using combinatorial substrate epitaxy
DOI:10.1063/1.4905012  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Lacotte, M.;David, A.;Pravarthana, D.;Grygiel, C.;Rohrer, G. S.;Salvador, P. A.;Velazquez, M.;de Kloe, R.;Prellier, W.;
7:2:24:19     Domain-selective photochemical reaction on oriented ferroelectric Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1016/j.apsusc.2012.10.155  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:3  AU: Lau, Kenny;Liu, Yun;Li, Qian;Li, Zhenrong;Withers, Ray L.;Xu, Zhuo;
7:2:24:20     Charge and orbital order at head-to-head domain walls in PbTiO3
DOI:10.1103/PhysRevB.90.115104  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Rahmanizadeh, K.;Wortmann, D.;Bihlmayer, G.;Bluegel, S.;
7:2:24:21     Polar Domains at the Surface of Centrosymmetric BiVO4
DOI:10.1021/cm501087j  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:5  AU: Munprom, Ratiporn;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:22     Enhanced Photochemical Reactivity at the Ferroelectric Phase Transition in Ba1-xSrxTiO3
DOI:10.1111/j.1551-2916.2010.04002.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Bhardwaj, Abhilasha;Burbure, Nina V.;Rohrer, Gregory S.;
7:2:24:23     Dynamic Response in Ba1-xSrxTiO3 and Anomalous Behavior at the Phase Boundary Composition
DOI:10.1111/jace.13072  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Iqbal, Asad M.;Jaffari, Ghulam Hassnain;Hasanain, Syed K.;
7:2:24:24     Visible-Light Photochemical Activity of Heterostructured Core-Shell Materials Composed of Selected Ternary Titanates and Ferrites Coated by TiO2
DOI:10.1021/am4008837  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:13  AU: Li, Li;Liu, Xuan;Zhang, Yiling;Nuhfer, Noel T.;Barmak, Katayun;Salvador, Paul A.;Rohrer, Gregory S.;
7:2:24:25     Single-step synthesis of doped TiO2 stratified thin-films by atmospheric-pressure chemical vapour deposition
DOI:10.1039/c4ta00935e  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:0  AU: Sotelo-Vazquez, Carlos;Quesada-Cabrera, Raul;Darr, Jawwad A.;Parkin, Ivan P.;
7:2:25:1     Micro- and nanodomain imaging in uniaxial ferroelectrics: Joint application of optical, confocal Raman, and piezoelectric force microscopy
DOI:10.1063/1.4891397  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:8  AU: Shur, V. Ya;Zelenovskiy, P. S.;
7:2:25:2     Investigation of the nanodomain structure formation by piezoelectric force microscopy and Raman confocal microscopy in LiNbO3 and LiTaO3 crystals
DOI:10.1063/1.3623778  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:20  AU: Shur, V. Ya;Zelenovskiy, P. S.;Nebogatikov, M. S.;Alikin, D. O.;Sarmanova, M. F.;Ievlev, A. V.;Mingaliev, E. A.;Kuznetsov, D. K.;
7:2:25:3     Influence of adsorbed surface layer on domain growth in the field produced by conductive tip of scanning probe microscope in lithium niobate
DOI:10.1063/1.3624798  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:22  AU: Shur, V. Ya;Ievlev, A. V.;Nikolaeva, E. V.;Shishkin, E. I.;Neradovskiy, M. M.;
7:2:25:4     Raman visualization of micro- and nanoscale domain structures in lithium niobate
DOI:10.1007/s00339-010-5621-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:15  AU: Zelenovskiy, P. S.;Fontana, M. D.;Shur, V. Y.;Bourson, P.;Kuznetsov, D. K.;
7:2:25:5     In situ investigation of formation of self-assembled nanodomain structure in lithium niobate after pulse laser irradiation
DOI:10.1063/1.3628646  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Shur, V. Ya.;Kuznetsov, D. K.;Mingaliev, E. A.;Yakunina, E. M.;Lobov, A. I.;Ievlev, A. V.;
7:2:25:6     Domain switching by electron beam irradiation of Z(+)-polar surface in Mg-doped lithium niobate
DOI:10.1063/1.4891842  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Shur, V. Ya;Chezganov, D. S.;Smirnov, M. M.;Alikin, D. O.;Neradovskiy, M. M.;Kuznetsov, D. K.;
7:2:25:7     Domain Nanotechnology in Ferroelectric Single Crystals: Lithium Niobate and Lithium Tantalate Family
DOI:10.1080/10584587.2013.794638  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Shur, V. Ya;
7:2:25:8     Shape of isolated domains in lithium tantalate single crystals at elevated temperatures
DOI:10.1063/1.4846015  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Shur, V. Ya.;Akhmatkhanov, A. R.;Chezganov, D. S.;Lobov, A. I.;Baturin, I. S.;Smirnov, M. M.;
7:2:25:9     Formation of dendrite domain structures in stoichiometric lithium niobate at elevated temperatures
DOI:10.1063/1.4766308  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Shur, V. Ya.;Chezganov, D. S.;Nebogatikov, M. S.;Baturin, I. S.;Neradovskiy, M. M.;
7:2:25:10     Nanodomain structures formation during polarization reversal in uniform electric field in strontium barium niobate single crystals
DOI:10.1063/1.4754511  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Shur, V. Ya;Shikhova, V. A.;Ievlev, A. V.;Zelenovskiy, P. S.;Neradovskiy, M. M.;Pelegov, D. V.;Ivleva, L. I.;
7:2:25:11     Time-dependent conduction current in lithium niobate crystals with charged domain walls
DOI:10.1063/1.4820351  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Shur, V. Ya;Baturin, I. S.;Akhmatkhanov, A. R.;Chezganov, D. S.;Esin, A. A.;
7:2:25:12     Raman Study of Neutral and Charged Domain Walls in Lithium Niobate
DOI:10.1080/00150193.2010.489810  JN:FERROELECTRICS  PY:2010
  TC:12  AU: Zelenovskiy, P. S.;Shur, V. Ya;Bourson, P.;Fontana, M. D.;Kuznetsov, D. K.;Mingaliev, E. A.;
7:2:25:13     Nanoscale Domain Structuring in Lithium Niobate Single Crystals by Pulse Laser Heating
DOI:10.1080/00150193.2010.489813  JN:FERROELECTRICS  PY:2010
  TC:11  AU: Kuznetsov, D. K.;Shur, V. Ya;Mingaliev, E. A.;Negashev, S. A.;Lobov, A. I.;Rumyantsev, E. L.;Novikov, P. A.;
7:2:25:14     Abnormal Domain Growth in Lithium Niobate with Surface Layer Modified by Proton Exchange
DOI:10.1080/00150193.2010.489840  JN:FERROELECTRICS  PY:2010
  TC:11  AU: Dolbilov, M. A.;Shishkin, E. I.;Shur, V. Ya;Tascu, S.;Baldi, P.;De Micheli, M. P.;
7:2:25:15     Polarization Reversal in MgO:LiNbO3 Single Crystals Modified by Plasma-Source Ion Irradiation
DOI:10.1080/00150193.2012.743374  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Pryakhina, V. I.;Shur, V. Ya.;Alikin, D. O.;Negashev, S. A.;
7:2:25:16     Formation of Nanodomain Structure in Front of the Moving Domain Wall in Lithium Niobate Single Crystal Modified by Proton Exchange
DOI:10.1080/10584587.2013.776408  JN:FERROELECTRICS  PY:2013
  TC:5  AU: Dolbilov, M. A.;Shur, V. Ya.;Shishkina, E. V.;Angudovich, E. S.;Ushakov, A. D.;Baldi, P.;de Micheli, M. P.;
7:2:25:17     Polarization reversal induced by heating-cooling cycles in MgO doped lithium niobate crystals
DOI:10.1063/1.4801969  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Shur, V. Ya;Mingaliev, E. A.;Lebedev, V. A.;Kuznetsov, D. K.;Fursov, D. V.;
7:2:25:18     Polarization reversal and domain kinetics in magnesium doped stoichiometric lithium tantalate
DOI:10.1063/1.4898348  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Shur, V. Ya.;Akhmatkhanov, A. R.;Chuvakova, M. A.;Baturin, I. S.;
7:2:25:19     Formation of Self-Assembled Domain Structures in Lithium Niobate Modified by Ar Ions Implantation
DOI:10.1080/00150193.2010.489855  JN:FERROELECTRICS  PY:2010
  TC:8  AU: Alikin, D. O.;Shishkin, E. I.;Nikolaeva, E. V.;Shur, V. Ya.;Sarmanova, M. F.;Ievlev, A. V.;Nebogatikov, M. S.;Gavrilov, N. V.;
7:2:25:20     Micro- and Nanodomain Structures Produced by Pulse Laser Heating in Congruent Lithium Tantalate
DOI:10.1080/00150193.2013.784180  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Shur, V. Ya;Mingaliev, E. A.;Kuznetsov, D. K.;Kosobokov, M. S.;
7:2:25:21     Polarization reversal and jump-like domain wall motion in stoichiometric LiTaO3 produced by vapor transport equilibration
DOI:10.1063/1.3673601  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Shur, V. Ya.;Akhmatkhanov, A. R.;Baturin, I. S.;Shishkina, E. V.;
7:2:25:22     Abnormal Domain Evolution in Lithium Niobate with Surface Layer Modified by Cu Ion Implantation
DOI:10.1080/00150193.2010.489860  JN:FERROELECTRICS  PY:2010
  TC:7  AU: Shishkin, E. I.;Nikolaeva, E. V.;Shur, V. Ya.;Sarmanova, M. F.;Dolbilov, M. A.;Nebogatikov, M. S.;Alikin, D. O.;Plaksin, O. A.;Gavrilov, N. V.;
7:2:25:23     The Domain Kinetics in Congruent Lithium Niobate Modified by Low and High Energy Ion Irradiation
DOI:10.1080/00150193.2012.746611  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Alikin, D. O.;Shur, V. Ya.;Pryakhina, V. I.;Gavrilov, N. V.;Carrascosa, M.;Olivares, J.;
7:2:25:24     Domain Kinetics in Lithium Niobate Single Crystals with Photoresist Dielectric Layer
DOI:10.1080/00150193.2012.743369  JN:FERROELECTRICS  PY:2012
  TC:5  AU: Akhmatkhanov, A. R.;Shur, V. Ya.;Baturin, I. S.;Zorikhin, D. V.;Lukmanova, A. M.;Zelenovskiy, P. S.;Neradovskiy, M. M.;
7:2:25:25     Formation of Stripe Domain Structures by Pulse Laser Irradiation of LiNbO3 Crystals
DOI:10.1080/00150193.2010.489847  JN:FERROELECTRICS  PY:2010
  TC:9  AU: Mingaliev, E. A.;Shur, V. Ya;Kuznetsov, D. K.;Negashev, S. A.;Lobov, A. I.;
7:2:25:26     Domain Nanotechnology in Lithium Niobate and Lithium Tantalate Crystals
DOI:10.1080/00150193.2010.490290  JN:FERROELECTRICS  PY:2010
  TC:6  AU: Shur, V. Ya.;
7:2:25:27     Study of Nanoscale Domain Structure Formation Using Raman Confocal Microscopy
DOI:10.1080/00150193.2010.489838  JN:FERROELECTRICS  PY:2010
  TC:6  AU: Shur, V. Ya;Shishkin, E. I.;Nikolaeva, E. V.;Nebogatikov, M. S.;Alikin, D. O.;Zelenovskiy, P. S.;Sarmanova, M. F.;Dolbilov, M. A.;
7:2:25:28     Micro-Raman Visualization of Domain Structure in Strontium Barium Niobate Single Crystals
DOI:10.1080/00150193.2012.746890  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Zelenovskiy, P. S.;Shikhova, V. A.;Ievlev, A. V.;Neradovskiy, M. M.;Shur, V. Ya.;
7:2:25:29     Fatigue Effect in Stoichiometric LiTaO3 Crystals Produced by Vapor Transport Equilibration
DOI:10.1080/00150193.2012.671693  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Shur, V. Ya.;Akhmatkhanov, A. R.;Baturin, I. S.;
7:2:25:30     Fatigue effect in ferroelectric crystals: Growth of the frozen domains
DOI:10.1063/1.4729834  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Shur, V. Ya;Akhmatkhanov, A. R.;Baturin, I. S.;
7:2:25:31     3D Modeling of Domain Structure Evolution During Discrete Switching in Lithium Niobate
DOI:10.1080/00150193.2010.490291  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Shur, V. Ya.;Lobov, A. I.;Rumyantsev, E. L.;Kuznetsov, D. K.;
7:2:25:32     Electric Field Poling of Lithium Niobate Crystals after Proton-Exchanged Channel Waveguide Fabrication
DOI:10.1080/00150193.2012.747746  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Smirnova, A. N.;Mushinskiy, S. S.;Baturin, I. S.;Azanova, I. S.;Shevtsov, D. I.;Akhmatkhanov, A. R.;Ievlev, A. V.;Shur, V. Ya.;
7:2:25:33     Polarization Reversal in Crystals of Congruent Lithium Tantalate at Elevated Temperatures
DOI:10.1080/00150193.2012.747385  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Chezganov, D. S.;Shur, V. Ya.;Baturin, I. S.;Akhmatkhanov, A. R.;
7:2:25:34     Modeling electric charge distribution on insulator under electron bombardment: Case of rectangular surface implantation
DOI:10.1063/1.3700435  JN:AIP ADVANCES  PY:2012
  TC:2  AU: Ghorbel, Nouha;Kallel, Ali;Damamme, Gilles;
7:2:26:1     Localized Excited Charge Carriers Generate Ultrafast Inhomogeneous Strain in the Multiferroic BiFeO3
DOI:10.1103/PhysRevLett.112.097602  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:6  AU: Schick, Daniel;Herzog, Marc;Wen, Haidan;Chen, Pice;Adamo, Carolina;Gaal, Peter;Schlom, Darrell G.;Evans, Paul G.;Li, Yuelin;Bargheer, Matias;
7:2:26:2     Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3
DOI:10.1063/1.4729423  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:21  AU: Sheu, Y. M.;Trugman, S. A.;Park, Y. -S.;Lee, S.;Yi, H. T.;Cheong, S. -W.;Jia, Q. X.;Taylor, A. J.;Prasankumar, R. P.;
7:2:26:3     Measurement of transient photoabsorption and photocurrent of BiFeO3 thin films: Evidence for long-lived trapped photocarriers
DOI:10.1103/PhysRevB.89.035133  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Yamada, Yasuhiro;Nakamura, Toru;Yasui, Shintaro;Funakubo, Hiroshi;Kanemitsu, Yoshihiko;
7:2:26:4     Temperature dependent photoexcited carrier dynamics in multiferroic BiFeO3 film: A hidden phase transition
DOI:10.1063/1.4871689  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhang, Zeyu;Jin, Zuanming;Pan, Qunfeng;Xu, Yue;Lin, Xian;Ma, Guohong;Cheng, Zhenxiang;
7:2:26:5     Electronic Origin of Ultrafast Photoinduced Strain in BiFeO3
DOI:10.1103/PhysRevLett.110.037601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:12  AU: Wen, Haidan;Chen, Pice;Cosgriff, Margaret P.;Walko, Donald A.;Lee, June Hyuk;Adamo, Carolina;Schaller, Richard D.;Ihlefeld, Jon F.;Dufresne, Eric M.;Schlom, Darrell G.;Evans, Paul G.;Freeland, John W.;Li, Yuelin;
7:2:26:6     Femtosecond laser generation and detection of high-frequency acoustic phonons in GaAs semiconductors
DOI:10.1103/PhysRevB.81.245207  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Babilotte, P.;Ruello, P.;Mounier, D.;Pezeril, T.;Vaudel, G.;Edely, M.;Breteau, J-M.;Gusev, V.;Blary, K.;
7:2:26:7     Coherent magnon and acoustic phonon dynamics in tetragonal and rare-earth-doped BiFeO3 multiferroic thin films
DOI:10.1103/PhysRevB.88.094425  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Doig, K. I.;Aguesse, F.;Axelsson, A. K.;Alford, N. M.;Nawaz, S.;Palkar, V. R.;Jones, S. P. P.;Johnson, R. D.;Synowicki, R. A.;Lloyd-Hughes, J.;
7:2:26:8     Photoexcitation of gigahertz longitudinal and shear acoustic waves in BiFeO3 multiferroic single crystal
DOI:10.1063/1.4719069  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:12  AU: Ruello, P.;Pezeril, T.;Avanesyan, S.;Vaudel, G.;Gusev, V.;Infante, I. C.;Dkhil, B.;
7:2:26:9     Strain modulated transient photostriction in La and Nb codoped multiferroic BiFeO3 thin films
DOI:10.1063/1.4770309  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Jin, Zuanming;Xu, Yue;Zhang, Zhengbing;Lin, Xian;Ma, Guohong;Cheng, Zhenxiang;Wang, Xiaolin;
7:2:26:10     Structural dependent ultrafast electron-phonon coupling in multiferroic BiFeO3 films
DOI:10.1063/1.3685496  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Jin, Zuanming;Xu, Yue;Zhang, Zhengbing;Li, Gaofang;Lin, Xian;Ma, Guohong;Cheng, Zhenxiang;Wang, Xiaolin;
7:2:26:11     Picosecond strain pulses generated by a supersonically expanding electron-hole plasma in GaAs
DOI:10.1103/PhysRevB.86.155207  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Young, E. S. K.;Akimov, A. V.;Campion, R. P.;Kent, A. J.;Gusev, V.;
7:2:26:12     Ultrafast transient reflectance of epitaxial semiconducting perovskite thin films
DOI:10.1063/1.48902411  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Smolin, S. Y.;Scafetta, M. D.;Guglietta, G. W.;Baxter, J. B.;May, S. J.;
7:2:26:13     Ultrafast photoinduced mechanical strain in epitaxial BiFeO3 thin films
DOI:10.1063/1.4734512  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Chen, L. Y.;Yang, J. C.;Luo, C. W.;Laing, C. W.;Wu, K. H.;Lin, J-Y;Uen, T. M.;Juang, J. Y.;Chu, Y. H.;Kobayashi, T.;
7:2:26:14     Wavelength dependence of photoinduced deformation in BiFeO3
DOI:10.1103/PhysRevB.85.092301  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Kundys, B.;Viret, M.;Meny, C.;Da Costa, V.;Colson, D.;Doudin, B.;
7:2:26:15     Laser generation of hypersound by a terahertz photo-Dember electric field in a piezoelectric GaAs semiconductor
DOI:10.1103/PhysRevB.90.014302  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Vaudel, Gwenaelle;Pezeril, Thomas;Lomonosov, Alexei;Lejman, Marius;Ruello, Pascal;Gusev, Vitalyi;
7:2:26:16     Picosecond acoustics in p-doped piezoelectric semiconductors
DOI:10.1063/1.3501125  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Babilotte, P.;Ruello, P.;Vaudel, G.;Pezeril, T.;Mounier, D.;Breteau, J. -M.;Gusev, V.;
7:2:26:17     Transition from piezoelectric to deformation potential mechanism of hypersound photogeneration in n-doped GaAs semiconductors
DOI:10.1063/1.3552912  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Babilotte, P.;Ruello, P.;Pezeril, T.;Vaudel, G.;Mounier, D.;Breteau, J. -M.;Gusev, V.;
7:2:26:18     Correlated terahertz acoustic and electromagnetic emission in dynamically screened InGaN/GaN quantum wells
DOI:10.1103/PhysRevB.84.085317  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: van Capel, P. J. S.;Turchinovich, D.;Porte, H. P.;Lahmann, S.;Rossow, U.;Hangleiter, A.;Dijkhuis, J. I.;
7:2:26:19     Ultrafast dynamics of the Mn3+ d-d transition and spin-lattice interaction in YMnO3 film
DOI:10.1063/1.3675906  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Jin, Zuanming;Ma, Hong;Li, Gaofang;Xu, Yue;Ma, Guohong;Cheng, Zhenxiang;
7:2:26:20     Time-resolved interferometric detection of ultrashort strain solitons in sapphire
DOI:10.1103/PhysRevB.81.144106  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: van Capel, P. J. S.;Dijkhuis, J. I.;
7:2:26:21     Propagation of acoustic phonon solitons in nonmetallic crystals
DOI:10.1103/PhysRevB.84.024301  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Maris, H. J.;Tamura, S.;
7:2:26:22     Thermal transport in thin films measured by time-resolved, grazing incidence x-ray diffraction
DOI:10.1063/1.3661164  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Walko, D. A.;Sheu, Y. -M.;Trigo, M.;Reis, D. A.;
7:2:26:23     Coherent acoustic phonon generation and detection by femtosecond laser pulses in ZnTe single crystals
DOI:10.1063/1.4820518  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Feng, D. H.;Pan, X. Q.;Li, X.;Jia, T. Q.;Sun, Z. R.;
7:2:26:24     Optical properties of epitaxial BiFeO3 thin films
DOI:10.1007/s00339-010-5881-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:6  AU: Zelezny, V.;Chvostova, D.;Pajasova, L.;Vrejoiu, I.;Alexe, M.;
7:2:26:25     Strong spin-lattice coupling in multiferroic hexagonal manganite YMnO3 probed by ultrafast optical spectroscopy
DOI:10.1063/1.3467459  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Jang, Kyeong-Jin;Lee, Han-gyoel;Lee, Sangkyung;Ahn, Jaewook;Ahn, Jai Seok;Hur, Namjung;Cheong, Sang-Wook;
7:2:26:26     Nonlinearity in the high-electric-field piezoelectricity of epitaxial BiFeO3 on SrTiO3
DOI:10.1063/1.3683533  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Chen, Pice;Sichel-Tissot, Rebecca J.;Young Jo, Ji;Smith, Ryan T.;Baek, Seung-Hyub;Saenrang, Wittawat;Eom, Chang-Beom;Sakata, Osami;Dufresne, Eric M.;Evans, Paul G.;
7:2:26:27     Ultrafast photoinduced linear and circular optical anisotropy in the multiferroic hexagonal manganite YMnO3
DOI:10.1103/PhysRevB.88.195112  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Pohl, M.;Pavlov, V. V.;Akimov, I. A.;Gridnev, V. N.;Pisarev, R. V.;Yakovlev, D. R.;Bayer, M.;
7:2:26:28     Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3 (vol 100, 242904, 2012)
DOI:10.1063/1.4821741  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Sheu, Y. -M.;Trugman, S. A.;Park, Y. -S.;Lee, S.;Yi, H. T.;Cheong, S. -W.;Jia, Q. X.;Taylor, A. J.;Prasankumar, R. P.;
7:2:26:29     A proposal for Coulomb assisted laser cooling of piezoelectric semiconductors
DOI:10.1063/1.4891763  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Nia, Iman Hassani;Mohseni, Hooman;
7:2:27:1     High-Resolution Studies of Domain Switching Behavior in Nanostructured Ferroelectric Polymers
DOI:10.1021/nl200221z  JN:NANO LETTERS  PY:2011
  TC:37  AU: Sharma, Pankaj;Reece, Timothy J.;Ducharme, Stephen;Gruverman, Alexei;
7:2:27:2     Rapid Nanoimprinting and Excellent Piezoresponse of Polymeric Ferroelectric Nanostructures
DOI:10.1021/nn901397r  JN:ACS NANO  PY:2010
  TC:38  AU: Liu, Yuanming;Weiss, Dirk N.;Li, Jiangyu;
7:2:27:3     Nanoscale domain growth dynamics of ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) thin films
DOI:10.1063/1.3290247  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Kim, Yunseok;Kim, Wooyoung;Choi, Hyunwoo;Hong, Seungbum;Ko, Hyungsoo;Lee, Heechul;No, Kwangsoo;
7:2:27:4     Domain wall roughness and creep in nanoscale crystalline ferroelectric polymers
DOI:10.1063/1.4820784  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Xiao, Z.;Poddar, Shashi;Ducharme, Stephen;Hong, X.;
7:2:27:5     Local ferroelectric properties in polyvinylidene fluoride/barium lead zirconate titanate nanocomposites: Interface effect
DOI:10.1063/1.4824463  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Silibin, M. V.;Solnyshkin, A. V.;Kiselev, D. A.;Morozovska, A. N.;Eliseev, E. A.;Gavrilov, S. A.;Malinkovich, M. D.;Lupascu, D. C.;Shvartsman, V. V.;
7:2:27:6     Effect of thermal annealing on ferroelectric domain structures in poly(vinylidene-fluoride-trifluorethylene) Langmuir-Blodgett thin films
DOI:10.1063/1.4891396  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Xiao, Z.;Hamblin, J.;Poddar, Shashi;Ducharme, Stephen;Paruch, P.;Hong, X.;
7:2:27:7     Orientational imaging in polar polymers by piezoresponse force microscopy
DOI:10.1063/1.3623765  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Sharma, Pankaj;Wu, Dong;Poddar, Shashi;Reece, Timothy J.;Ducharme, Stephen;Gruverman, Alexei;
7:2:27:8     Fabrication of complex nanostructures of Poly(vinylidenefluoride-trifluoroethylene) by dual step hot-embossing
DOI:10.1116/1.3662087  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:0  AU: Wen, Juan-juan;Shen, Zhen-kui;Qiu, Zhi-jun;Jiang, An-quan;Liu, Ran;Chen, Yifang;
7:2:27:9     Effect of disorder potential on domain switching behavior in polymer ferroelectric films
DOI:10.1088/0957-4484/24/1/015706  JN:NANOTECHNOLOGY  PY:2013
  TC:8  AU: Sharma, Pankaj;Nakajima, Takashi;Okamura, Soichiro;Gruverman, Alexei;
7:2:27:10     Facile Preparation of PbTiO3 Nanodot Arrays: Combining Nanohybridization with Vapor Phase Reaction Sputtering
DOI:10.1002/adfm.201101033  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:10  AU: Kim, Jiyoon;Hong, Jongin;Park, Moonkyu;Zhe, Wu;Kim, Dongjin;Jang, Yu Jin;Kim, Dong Ha;No, Kwangsoo;
7:2:27:11     Coplanar switching of polarization in thin films of vinylidene fluoride oligomers
DOI:10.1063/1.4901257  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Sharma, Pankaj;Fursina, Alexandra;Poddar, Shashi;Ducharme, Stephen;Gruverman, Alexei;
7:2:27:12     P(VDF-TrFE) nanorod assemblies with anisotropic piezoelectric properties investigated by piezoelectric response microscopy
DOI:10.1063/1.4891402  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chen, Xiaosui;Wang, Yunli;Cai, Kai;Bai, Yang;Bo, Shuhui;Guo, Dong;
7:2:27:13     Novel techniques for modifying microtube surfaces with various periodic structures ranging from nano to microscale
DOI:10.1116/1.4772769  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:0  AU: Liu, Zhaoqian;Li, Jinxing;Lu, Bingrui;Chen, Yifang;Liu, Ran;Huang, Gaoshan;Mei, Yongfeng;
7:2:27:14     Spatially Selective Photochemical Reduction of Silver on Nanoembossed Ferroelectric PZT Nanowires
DOI:10.1021/la200377b  JN:LANGMUIR  PY:2011
  TC:13  AU: Shen, Zhenkui;Chen, Guoping;Chen, Zhihui;Qu, Xinping;Chen, Yifang;Liu, Ran;
7:2:27:15     Humidity effect of domain wall roughening behavior in ferroelectric copolymer thin films
DOI:10.1088/0957-4484/25/35/355703  JN:NANOTECHNOLOGY  PY:2014
  TC:2  AU: Park, Kwang-Won;Seo, Hosung;Kim, Jiyoon;Seol, Daehee;Hong, Jongin;Kim, Yunseok;
7:2:27:16     The piezoresponse force microscopy investigation of self-polarization alignment in poly(vinylidene fluoride-co-trifluoroethylene) ultrathin films
DOI:10.1039/c1sm05950e  JN:SOFT MATTER  PY:2012
  TC:11  AU: Park, Moonkyu;Choi, Yoon-Young;Kim, Jiyoon;Hong, Jongin;Song, Han Wook;Sung, Tae-Hyun;No, Kwangsoo;
7:2:27:17     Nanoembossing Induced Ferroelectric Lithography on PZT Films for Silver Particle Patterning
DOI:10.1021/nn202932z  JN:ACS NANO  PY:2011
  TC:6  AU: Shen, Zhenkui;Qu, Xinping;Chen, Yifang;Liu, Ran;
7:2:27:18     Local surface potential distribution and its relaxation in ferroelectric poly(vinylidenefluoride-co-trifluoroethylene) thin films
DOI:10.1063/1.4734870  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Choi, Hyunwoo;Hong, Jongin;No, Kwangsoo;
7:2:27:19     Investigation of ferroelectric domains in thin films of vinylidene fluoride oligomers
DOI:10.1063/1.4890412  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Sharma, Pankaj;Poddar, Shashi;Korlacki, Rafal;Ducharme, Stephen;Gruverman, Alexei;
7:2:27:20     Thermal variation of piezoresponse in microscopically poled poly(vinylidene fluoride-trifluoroethylene) ferroelectric copolymers approaching Curie temperature
DOI:10.1063/1.3623774  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Liu, Yuanming;Xie, Shuhong;Liu, Xiaoyan;Kitamura, Kenji;Li, Jiangyu;
7:2:27:21     Cold-Field Switching in PVDF-TrFE Ferroelectric Polymer Nanomesas
DOI:10.1103/PhysRevLett.108.027603  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:8  AU: Stolichnov, Igor;Maksymovych, Peter;Mikheev, Evgeny;Kalinin, Sergei V.;Tagantsev, Alexander K.;Setter, Nava;
7:2:27:22     Polarization switching at the nanoscale in ferroelectric copolymer thin films
DOI:10.1063/1.3646906  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Gaynutdinov, R. V.;Mitko, S.;Yudin, S. G.;Fridkin, V. M.;Ducharme, Stephen;
7:2:27:23     Effects of surface morphology on retention loss of ferroelectric domains in poly(vinylidenefluoride-co-trifluoroethylene) thin films
DOI:10.1063/1.3632042  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Choi, Hyunwoo;Hong, Seungbum;Sung, Tae-Hyun;No, Kwangsoo;
7:2:27:24     Overhanging ferroelectric nanodot arrays created by high surface energy seeds
DOI:10.1016/j.apsusc.2014.06.134  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Kim, Jiyoon;Park, Kwang-Won;Hong, Jongin;No, Kwangsoo;
7:2:27:25     Spin-coated ultrathin poly(vinylidene fluoride-co-trifluoroethylene) films for flexible and transparent electronics
DOI:10.1039/c0jm03533e  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:10  AU: Choi, Yoon-Young;Hong, Jongin;Leem, Dong-Seok;Park, Moonkyu;Song, HanWook;Sung, Tae-Hyun;No, Kwangsoo;
7:2:27:26     Electromechanical properties of dried tendon and isoelectrically focused collagen hydrogels
DOI:10.1016/j.actbio.2012.04.017  JN:ACTA BIOMATERIALIA  PY:2012
  TC:7  AU: Denning, D.;Abu-Rub, M. T.;Zeugolis, D. I.;Habelitz, S.;Pandit, A.;Fertala, A.;Rodriguez, B. J.;
7:2:27:27     Effect of deposition temperature of TiO2 on the piezoelectric property of PbTiO3 film grown by PbO gas phase reaction sputtering
DOI:10.1063/1.3406148  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Kim, Jiyoon;Hong, Seungbum;Buehlmann, Simon;Kim, Yunseok;Park, Moonkyu;Kim, Yong Kwan;No, Kwangsoo;
7:2:27:28     In situ observation of the nanocrystal growth and their piezoelectric performance change in P(VDF-TrFE) films by hot stage piezoresponse force microscopy
DOI:10.1063/1.4801971  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Guo, Dong;Chen, Xiaosui;Chu, Xiangcheng;Zeng, Fei;Bai, Yang;Cao, Jiangli;Dkhil, Brahim;
7:2:27:29     Fabrication and Characterization of Nanoscale Ferroelectric Honeycombs
DOI:10.1111/jace.12352  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Kim, Bongsoo;Hong, Seungbum;Choi, Hyunwoo;Ryu, Won-Hee;Paik, Haemin;Choi, Yoon-Young;Kwon, Hyuk-Sang;No, Kwangsoo;
7:2:27:30     Photocrosslinking of ferroelectric polymers and its application in three-dimensional memory arrays
DOI:10.1063/1.3571284  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: van Breemen, A. J. J. M.;van der Putten, J. B. P. H.;Cai, R.;Reimann, K.;Marsman, A. W.;Willard, N.;de Leeuw, D. M.;Gelinck, G. H.;
7:2:27:31     Nanoembossing and piezoelectricity of ferroelectric Pb(Zr-0.3,Ti-0.7)O-3 nanowire arrays
DOI:10.1016/j.apsusc.2011.04.063  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:5  AU: Shen, Z. K.;Chen, Z. H.;Li, H.;Qu, X. P.;Chen, Y.;Liu, R.;
7:2:27:32     Characterizations of nanoembossed Pb(Zr-0.3, Ti-0.7)O-3 ferroelectric films
DOI:10.1116/1.3497018  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2010
  TC:2  AU: Shen, Zhenkui;Chen, Zhihui;Lu, Qian;Jiang, Anquan;Qiu, Zhijun;Qu, Xinping;Chen, Yifang;Liu, Ran;
7:2:27:33     Nanoembossing Induced Ferroelectric Lithography on PZT Films for Silver Particle Patterning (Retraction of vol 5, pg 6855, 2011)
DOI:10.1021/nn2049653  JN:ACS NANO  PY:2012
  TC:1  AU: Shen, Zhenkui;Qu, Xinping;Chen, Yifang;Liu, Ran;
7:2:27:34     Spatially Selective Photochemical Reduction of Silver on Nanoembossed Ferroelectric PZT Nanowires (vol 27, pg 5167, 2011)
DOI:10.1021/la204972g  JN:LANGMUIR  PY:2012
  TC:0  AU: Shen, Zhenkui;Chen, Guoping;Chen, Zhihui;Qu, Xinping;Chen, Yifang;Liu, Ran;
7:2:28:1     Preface to Special Topic: Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials
DOI:10.1063/1.4751458  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Kalinin, Sergei V.;Ye, Zuo-Guang;Kholkin, Andrei L.;
7:2:28:2     Polarization Switching without Domain Formation at the Intrinsic Coercive Field in Ultrathin Ferroelectric PbTiO3
DOI:10.1103/PhysRevLett.105.167601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:38  AU: Highland, Matthew J.;Fister, Timothy T.;Richard, Marie-Ingrid;Fong, Dillon D.;Fuoss, Paul H.;Thompson, Carol;Eastman, Jeffrey A.;Streiffer, Stephen K.;Stephenson, G. Brian;
7:2:28:3     Equilibrium Polarization of Ultrathin PbTiO3 with Surface Compensation Controlled by Oxygen Partial Pressure
DOI:10.1103/PhysRevLett.107.187602  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:21  AU: Highland, M. J.;Fister, T. T.;Fong, D. D.;Fuoss, P. H.;Thompson, Carol;Eastman, J. A.;Streiffer, S. K.;Stephenson, G. B.;
7:2:28:4     Equilibrium and stability of polarization in ultrathin ferroelectric films with ionic surface compensation
DOI:10.1103/PhysRevB.84.064107  JN:PHYSICAL REVIEW B  PY:2011
  TC:24  AU: Stephenson, G. Brian;Highland, Matthew J.;
7:2:28:5     Electrochemical ferroelectric switching: Origin of polarization reversal in ultrathin films
DOI:10.1103/PhysRevB.85.024106  JN:PHYSICAL REVIEW B  PY:2012
  TC:13  AU: Bristowe, N. C.;Stengel, Massimiliano;Littlewood, P. B.;Pruneda, J. M.;Artacho, Emilio;
7:2:28:6     Ion motion and electrochemistry in nanostructures
DOI:10.1557/mrs.2011.266  JN:MRS BULLETIN  PY:2011
  TC:7  AU: Natelson, Douglas;Di Ventra, Massimiliano;
7:2:28:7     Direct Probing of Charge Injection and Polarization-Controlled Ionic Mobility on Ferroelectric LiNbO3 Surfaces
DOI:10.1002/adma.201304002  JN:ADVANCED MATERIALS  PY:2014
  TC:4  AU: Strelcov, Evgheni;Ievlev, Anton V.;Jesse, Stephen;Kravchenko, Ivan I.;Shur, Vladimir Y.;Kalinin, Sergei V.;
7:2:28:8     Preface to Special Topic: Piezoresponse force microscopy and nanoscale phenomena in polar materials
DOI:10.1063/1.4891444  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Bassiri-Gharb, Nazanin;Kalinin, Sergei V.;Valanoor, Nagarajan;
7:2:28:9     Watching domains grow: In-situ studies of polarization switching by combined scanning probe and scanning transmission electron microscopy
DOI:10.1063/1.3623779  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:23  AU: Chang, Hyejung;Kalinin, Sergei V.;Yang, Seungyeul;Yu, Pu;Bhattacharya, Saswata;Wu, Ping P.;Balke, Nina;Jesse, Stephen;Chen, Long Q.;Ramesh, Ramamoorthy;Pennycook, Stephen J.;Borisevich, Albina Y.;
7:2:28:10     Space- and Time-Resolved Mapping of Ionic Dynamic and Electroresistive Phenomena in Lateral Devices
DOI:10.1021/nn4017873  JN:ACS NANO  PY:2013
  TC:5  AU: Strelcov, Evgheni;Jesse, Stephen;Huang, Yen-Lin;Teng, Yung-Chun;Kravchenko, Ivan I.;Chu, Ying-Hao;Kalinin, Sergei V.;
7:2:28:11     Redox-based resistive switching in ferroelectric perovskite nanotubes
DOI:10.1063/1.3486224  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Nonnenmann, Stephen S.;Gallo, Eric M.;Spanier, Jonathan E.;
7:2:28:12     The determination of the three-phase boundary width of solid oxide fuel cell cathodes by current-driven O-18 tracer incorporation
DOI:10.1016/j.scriptamat.2010.07.022  JN:SCRIPTA MATERIALIA  PY:2011
  TC:12  AU: Fleig, J.;Schintlmeister, A.;Opitz, A. K.;Hutter, H.;
7:2:28:13     Electronic surface compensation of polarization in PbTiO3 films
DOI:10.1063/1.4750041  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: He, Jun;Stephenson, G. B.;Nakhmanson, S. M.;
7:2:28:14     90-degree polarization switching in BaTiO3 crystals without domain wall motion
DOI:10.1063/1.4832784  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Li, Y. W.;Scott, J. F.;Fang, D. N.;Li, F. X.;
7:2:28:15     Interfacial charge and strain effects on the ferroelectric behavior of epitaxial (001) PbTiO3 films on (110) DyScO3 substrates
DOI:10.1063/1.4869579  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Highland, M. J.;Fong, D. D.;Stephenson, G. B.;Fister, T. T.;Fuoss, P. H.;Streiffer, S. K.;Thompson, Carol;Richard, M. -I.;Eastman, J. A.;
7:2:28:16     Evolution of potential distributions during the charging of nano-structured metal oxide films in air as response to sudden voltage application
DOI:10.1016/j.tsf.2009.12.024  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Kiselev, I.;Sommer, M.;
7:2:29:1     Topology of the polarization field in ferroelectric nanowires from first principles
DOI:10.1103/PhysRevB.81.172101  JN:PHYSICAL REVIEW B  PY:2010
  TC:31  AU: Hong, Jiawang;Catalan, G.;Fang, D. N.;Artacho, Emilio;Scott, J. F.;
7:2:29:2     Pyroelectric response of ferroelectric nanowires: Size effect and electric energy harvesting
DOI:10.1063/1.3474964  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:28  AU: Morozovska, A. N.;Eliseev, E. A.;Svechnikov, G. S.;Kalinin, S. V.;
7:2:29:3     Low-Symmetry Phases in Ferroelectric Nanowires
DOI:10.1021/nl9034708  JN:NANO LETTERS  PY:2010
  TC:33  AU: Louis, L.;Gemeiner, P.;Ponomareva, I.;Bellaiche, L.;Geneste, G.;Ma, W.;Setter, N.;Dkhil, B.;
7:2:29:4     Roto-flexoelectric coupling impact on the phase diagrams and pyroelectricity of thin SrTiO3 films
DOI:10.1063/1.4752397  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Morozovska, Anna N.;Eliseev, Eugene A.;Bravina, Svetlana L.;Borisevich, Albina Y.;Kalinin, Sergei V.;
7:2:29:5     Ultrafast Polarization Response of an Optically Trapped Single Ferroelectric Nanowire
DOI:10.1021/nl5011228  JN:NANO LETTERS  PY:2014
  TC:1  AU: Nah, Sanghee;Kuo, Yi-Hong;Chen, Frank;Park, Joonsuk;Sinclair, Robert;Lindenberg, Aaron M.;
7:2:29:6     Ab initio study on mechanical-bending-induced ferroelectric phase transition in ultrathin perovskite nanobelts
DOI:10.1016/j.actamat.2014.05.054  JN:ACTA MATERIALIA  PY:2014
  TC:1  AU: Li, H. F.;Zhang, G. H.;Zheng, Yue;Wang, Biao;Chen, W. J.;
7:2:29:7     An unusual route to polarization reversal in ferroelectric ultrathin nanowires
DOI:10.1063/1.4890128  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Herchig, R.;Chang, Ch-M.;Mani, B. K.;Ponomareva, I.;
7:2:29:8     Complex polarization ordering in PbTiO3 nanowires: A first-principles computational study
DOI:10.1103/PhysRevB.82.155442  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Pilania, G.;Ramprasad, R.;
7:2:29:9     Phase diagram of ferroelectric nanowires and its mechanical force controllability
DOI:10.1063/1.3446854  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Lin, S. P.;Zheng, Yue;Cai, M. Q.;Wang, Biao;
7:2:29:10     Stress-induced phase transition and deformation behavior of BaTiO(3) nanowires
DOI:10.1063/1.3633267  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Zhang, Yihui;Liu, Bin;Fang, Daining;
7:2:29:11     One-Dimensional Ferroelectrics: Nanowires and Nanotubes
DOI:10.1080/07399332.2012.678120  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Alexe, M.;Hesse, D.;
7:2:29:12     Synthesis of Monoclinic Potassium Niobate Nanowires That Are Stable at Room Temperature
DOI:10.1021/ja308209m  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2013
  TC:10  AU: Kim, Seungwook;Lee, Ju-Hyuck;Lee, Jaeyeon;Kim, Sang-Woo;Kim, Myung Hwa;Park, Sungnam;Chung, Haegeun;Kim, Yong-Il;Kim, Woong;
7:2:29:13     A surface-layer model of ferroelectric nanowire
DOI:10.1063/1.3525267  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Zhang, Yihui;Hong, Jiawang;Liu, Bin;Fang, Daining;
7:2:29:14     Terahertz sensing using ferroelectric nanowires
DOI:10.1088/0957-4484/24/4/045501  JN:NANOTECHNOLOGY  PY:2013
  TC:3  AU: Herchig, R.;Schultz, Kimberly;McCash, Kevin;Ponomareva, I.;
7:2:29:15     Effects of surface tension and axis stress on piezoelectric behaviors of ferroelectric nanowires
DOI:10.1063/1.3661169  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Chen, Y. Q.;En, Y. F.;Huang, Y.;Kong, X. D.;Zheng, X. J.;Lu, Y. D.;
7:2:29:16     Surface and size effects on phase diagrams of ferroelectric nanocylinders
DOI:10.1063/1.3624829  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Zheng, Yue;Lin, S. P.;Wang, Biao;
7:2:29:17     Domain structures and switching properties in ferroelectric nanocomposites
DOI:10.1063/1.4823553  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Artemev, A.;
7:2:29:18     The Ferroelectricity at the Nanoscale
DOI:10.1080/00150193.2014.895201  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Fridkin, V.;Ducharme, S.;
7:2:29:19     Polarization control in ferroelectric PbTiO3 nanorods
DOI:10.1063/1.3525593  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Saeterli, Ragnhild;Rorvik, Per Martin;You, Chang Chuan;Holmestad, Randi;Tybell, Thomas;Grande, Tor;van Helvoort, Antonius T. J.;Einarsrud, Mari-Ann;
7:2:29:20     Competing polarization reversal mechanisms in ferroelectric nanowires
DOI:10.1103/PhysRevB.86.214108  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;
7:2:29:21     Phase diagram and ferroelectric behaviors of BaTiO3 nanowires
DOI:10.1063/1.3559810  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Qiu, J. H.;Ding, J. N.;Yuan, N. Y.;Cao, H. X.;Wang, X. Q.;Zhou, Y.;
7:2:29:22     Large coercivity and polarization of sol-gel derived BaTiO3 nanowires
DOI:10.1063/1.3641986  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Boucher, R.;Renz, P.;Li, C.;Fuhrlich, T.;Bauch, J.;Yoon, K. H.;Lupascu, D. C.;
7:2:29:23     Interesting properties of ferroelectric Pb(Zr0.5Ti0.5)O-3 nanotube array embedded in matrix medium
DOI:10.1063/1.4816483  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Adhikari, Rajendra;Fu, Huaxiang;
7:2:30:1     Multiple high-pressure phase transitions in BiFeO3
DOI:10.1103/PhysRevB.84.174107  JN:PHYSICAL REVIEW B  PY:2011
  TC:27  AU: Guennou, Mael;Bouvier, Pierre;Chen, Grace S.;Dkhil, Brahim;Haumont, Raphael;Garbarino, Gaston;Kreisel, Jens;
7:2:30:2     Pressure-temperature phase diagram of SrTiO3 up to 53 GPa
DOI:10.1103/PhysRevB.81.054115  JN:PHYSICAL REVIEW B  PY:2010
  TC:36  AU: Guennou, Mael;Bouvier, Pierre;Kreisel, Jens;Machon, Denis;
7:2:30:3     Jahn-Teller, Polarity, and Insulator-to-Metal Transition in BiMnO3 at High Pressure
DOI:10.1103/PhysRevLett.112.075501  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:5  AU: Guennou, Mael;Bouvier, Pierre;Toulemonde, Pierre;Darie, Celine;Goujon, Celine;Bordet, Pierre;Hanfland, Michael;Kreisel, Jens;
7:2:30:4     Competition between ferromagnetic and antiferromagnetic ground states in multiferroic BiMnO3 at high pressures
DOI:10.1103/PhysRevB.82.014401  JN:PHYSICAL REVIEW B  PY:2010
  TC:19  AU: Kozlenko, D. P.;Belik, A. A.;Kichanov, S. E.;Mirebeau, I.;Sheptyakov, D. V.;Straessle, Th.;Makarova, O. L.;Belushkin, A. V.;Savenko, B. N.;Takayama-Muromachi, E.;
7:2:30:5     High-pressure investigation of CaTiO3 up to 60 GPa using x-ray diffraction and Raman spectroscopy
DOI:10.1103/PhysRevB.82.134101  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Guennou, Mael;Bouvier, Pierre;Krikler, Benjamin;Kreisel, Jens;Haumont, Raphael;Garbarino, Gaston;
7:2:30:6     Pressure-dependent electronic structures and orbital hybridization of Mn 3d states in multiferroic BiMnO3: A combined x-ray absorption, x-ray emission, and resonant x-ray emission study
DOI:10.1103/PhysRevB.86.045103  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Chen, J. M.;Haw, S. C.;Lee, J. M.;Chen, S. A.;Lu, K. T.;Chen, S. W.;Deng, M. J.;Liao, Y. -F.;Lin, J. M.;Chen, B. H.;Chou, F. C.;Hiraoka, N.;Ishii, H.;Tsuei, K. D.;Huang, Eugene;
7:2:30:7     Persistence of Jahn-Teller Distortion up to the Insulator to Metal Transition in LaMnO3
DOI:10.1103/PhysRevLett.106.066402  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:24  AU: Baldini, M.;Struzhkin, V. V.;Goncharov, A. F.;Postorino, P.;Mao, W. L.;
7:2:30:8     Effect of pressure on the band gap and the local FeO6 environment in BiFeO3
DOI:10.1103/PhysRevB.85.144109  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Gomez-Salces, Susana;Aguado, Fernando;Rodriguez, Fernando;Valiente, Rafael;Gonzalez, Jesus;Haumont, Raphael;Kreisel, Jens;
7:2:30:9     Crucial role of orbital structure in formation of frustrated magnetic structure in BiMnO3
DOI:10.1103/PhysRevB.88.094401  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Gonchar, L. E.;Nikiforov, A. E.;
7:2:30:10     Crystal and Magnetic Structures and Properties of BiMnO3+delta
DOI:10.1021/ja102014n  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:24  AU: Belik, Alexei A.;Kodama, Katsuaki;Igawa, Naoki;Shamoto, Shin-ichi;Kosuda, Kosuke;Takayama-Muromachi, Eiji;
7:2:30:11     Structural transitions and transport-half-metallic ferromagnetism in LaMnO3 at elevated pressure
DOI:10.1103/PhysRevB.85.195135  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: He, Jiangang;Chen, Ming-Xing;Chen, Xing-Qiu;Franchini, Cesare;
7:2:30:12     Ferromagnetism and ferroelectricity in epitaxial BiMnO3 ultra-thin films
DOI:10.1063/1.4818136  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: De Luca, G. M.;Preziosi, D.;Chiarella, F.;Di Capua, R.;Gariglio, S.;Lettieri, S.;Salluzzo, M.;
7:2:30:13     Single-crystalline BiMnO3 studied by temperature-dependent x-ray diffraction and Raman spectroscopy
DOI:10.1103/PhysRevB.89.224107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Toulemonde, P.;Bordet, P.;Bouvier, P.;Kreisel, J.;
7:2:30:14     Absence of ferroelectricity in BiMnO3 ceramics
DOI:10.1063/1.4757944  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Goian, V.;Kamba, S.;Savinov, M.;Nuzhnyy, D.;Borodavka, F.;Vanek, P.;Belik, A. A.;
7:2:30:15     Structural phase transition of BaZrO3 under high pressure
DOI:10.1063/1.4868906  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yang, Xue;Li, Quanjun;Liu, Ran;Liu, Bo;Zhang, Huafang;Jiang, Shuqing;Liu, Jing;Zou, Bo;Cui, Tian;Liu, Bingbing;
7:2:30:16     Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3
DOI:10.1103/PhysRevB.85.052101  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Oliveira, J.;Moreira, J. Agostinho;Almeida, A.;Rodrigues, V. H.;Costa, M. M. R.;Tavares, P. B.;Bouvier, P.;Guennou, M.;Kreisel, J.;
7:2:30:17     Structural, Magnetic, and Electrical Properties of Bi1-xLaxMnO3 (x=0.0, 0.1, and 0.2) Solid Solutions
DOI:10.1021/cm202900v  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:3  AU: Chen, Wei-Tin;Sher, Falak;Mathur, Neil D.;Kavanagh, Christopher M.;Morrison, Finlay D.;Attfield, J. Paul;
7:2:30:18     Raman spectroscopic study of phase stability and anharmonicity in Bi12TiO20
DOI:10.1016/j.matchemphys.2013.02.011  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:1  AU: Rao, Rekha;Salke, Nilesh P.;Garg, Alka B.;
7:2:30:19     Defects of the crystal structure and Jahn-Teller distortion in BiMnO3
DOI:10.1103/PhysRevB.82.245101  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Boukhvalov, D. W.;Solovyev, I. V.;
7:2:30:20     Pressure effects on Jahn-Teller distortion in perovskites: The roles of local and bulk compressibilities
DOI:10.1103/PhysRevB.85.100101  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Aguado, Fernando;Rodriguez, Fernando;Valiente, Rafael;Itie, Jean-Paul;Hanfland, Michael;
7:2:30:21     Structural polymorphism in multiferroic BiMnO3 at high pressures and temperatures
DOI:10.1016/j.jallcom.2013.10.020  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Kozlenko, D. P.;Dang, N. T.;Jabarov, S. H.;Belik, A. A.;Kichanov, S. E.;Lukin, E. V.;Lathe, C.;Dubrovinsky, L. S.;Kazimirov, V. Yu;Smirnov, M. B.;Savenko, B. N.;Mammadov, A. I.;Takayama-Muromachi, E.;Khiem, L. H.;
7:2:30:22     Intra- and intersite electronic excitations in multiferroic TbMnO3 probed by resonant inelastic x-ray scattering
DOI:10.1103/PhysRevB.82.094442  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Chen, J. M.;Lee, J. M.;Huang, S. W.;Lu, K. T.;Jeng, H. T.;Chen, C. K.;Haw, S. C.;Chou, T. L.;Chen, S. A.;Hiraoka, N.;Ishii, H.;Tsuei, K. D.;Yang, T. J.;
7:2:30:23     Lattice dynamics and pressure-induced phase transitions in Bi2W2O9: High-pressure Raman study
DOI:10.1103/PhysRevB.81.104301  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Maczka, M.;Paraguassu, W.;Freire, P. T. C.;Souza Filho, A. G.;Mendes Filho, J.;Hanuza, J.;
7:2:30:24     High-temperature ferroic phase transitions and paraelectric cubic phase in multiferroic Bi0.95+delta Fe0.9Zr0.1O3
DOI:10.1063/1.4729484  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Wei, Jie;Haumont, Raphael;Jarrier, Romain;Berthet, Patrick;Dkhil, Brahim;
7:2:30:25     Pressure effect on structural and vibrational properties of Sm-substituted BiFeO3
DOI:10.1063/1.4826069  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Wu, Yu-Jie;Chen, Xiao-Kun;Zhang, Jing;Liu, Jing;Xiao, Wan-Sheng;Wu, Zhigang;Chen, Xiao-Jia;
7:2:30:26     Crystallization of nanosized Aurivillius phase Bi2W2O9 from amorphous precursor
DOI:10.1016/j.matchemphys.2010.08.077  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:2  AU: Maczka, M.;Kepinski, L.;Macalik, L.;Hanuza, J.;
7:2:30:27     Effects of Oxygen Content on Bi3Mn3O11+delta: From 45 K Antiferromagnetism to Room-Temperature True Ferromagnetism
DOI:10.1021/ja1043598  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:9  AU: Belik, Alexei A.;Takayama-Muromachi, Eiji;
7:2:30:28     High pressure behavior of Ga-doped LaMnO3: a combined X-ray diffraction and optical spectroscopy study
DOI:10.1039/b914975a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:7  AU: Malavasi, Lorenzo;Baldini, Maria;di Castro, Daniele;Nucara, Alessandro;Crichton, Wilson;Mezouar, Mohamed;Blasco, Javier;Postorino, Paolo;
7:2:30:29     High-pressure Raman scattering study of ferroelectric K3Nb3O6(BO3)(2)
DOI:10.1103/PhysRevB.82.014106  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Maczka, M.;Paraguassu, W.;Freire, P. T. C.;Souza Filho, A. G.;Mendes Filho, J.;Hanuza, J.;
7:2:30:30     Uniaxial colossal magnetoresistance in the Ising magnet SrCo12O19
DOI:10.1103/PhysRevB.83.020401  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Ishiwata, S.;Nakano, T.;Terasaki, I.;Nakao, H.;Murakami, Y.;Uwatoko, Y.;Takano, M.;
7:2:30:31     Spin-ordering mediated orbital hybridization in CoO at high pressures
DOI:10.1103/PhysRevB.86.094107  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Ding, Yang;Fernandez-Rodriguez, Javier;Kim, Jungho;Li, Fangfei;Casa, Diego;Upton, Mary;Gog, Thomas;Mao, Ho-kwang;van Veenendaal, Michel;
7:2:31:1     Preface to Special Topic: Selected Papers from the Piezoresponse Force Microscopy Workshop Series: Part of the Joint ISAF-ECAPD-PFM 2012 Conference
DOI:10.1063/1.4802189  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Li, Jiangyu;Kalinin, Sergei;Kholkin, Andrei;
7:2:31:2     Biological Ferroelectricity Uncovered in Aortic Walls by Piezoresponse Force Microscopy
DOI:10.1103/PhysRevLett.108.078103  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:41  AU: Liu, Yuanming;Zhang, Yanhang;Chow, Ming-Jay;Chen, Qian Nataly;Li, Jiangyu;
7:2:31:3     Effective piezoelectric response of twin walls in ferroelectrics
DOI:10.1063/1.4801988  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Morozovska, Anna N.;Eliseev, Eugene A.;Varenyk, Oleksandr V.;Kalinin, Sergei V.;
7:2:31:4     White-light-controlled ferromagnetic and ferroelectric properties of multiferroic single-crystalline BiFeO3 nanoflowers at room temperature
DOI:10.1039/c4tc01196a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:1  AU: Sun, Bai;Wei, Lujun;Li, Hongwei;Chen, Peng;
7:2:31:5     Analyzing piezoresponse force microscopy for reconstruction of probed ferroelectric structures
DOI:10.1063/1.4746034  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Pan, K.;Liu, Y. Y.;Liu, Y. M.;Li, J. Y.;
7:2:31:6     The effects of domain wall thickness on the nanoscale piezoresponse of ferroelectric domains
DOI:10.1063/1.4891354  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chen, L. Q.;Pan, K.;Liu, Y. Y.;
7:2:31:7     Glucose Suppresses Biological Ferroelectricity in Aortic Elastin
DOI:10.1103/PhysRevLett.110.168101  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:12  AU: Liu, Yuanming;Wang, Yunjie;Chow, Ming-Jay;Chen, Nataly Q.;Ma, Feiyue;Zhang, Yanhang;Li, Jiangyu;
7:2:31:8     The electromechanics of piezoresponse force microscopy for a transversely isotropic piezoelectric medium
DOI:10.1016/j.actamat.2013.08.019  JN:ACTA MATERIALIA  PY:2013
  TC:3  AU: Pan, K.;Liu, Y. Y.;Xie, S. H.;Liu, Y. M.;Li, J. Y.;
7:2:31:9     Resolving ferroelectric nanostructures via piezoresponse force microscopy-A numerical investigation
DOI:10.1063/1.4801970  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Pan, K.;Liu, Y. M.;Liu, Y. Y.;Li, J. Y.;
7:2:31:10     Nanoscale Ferroelectricity in Crystalline gamma-Glycine
DOI:10.1002/adfm.201103011  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:25  AU: Heredia, Alejandro;Meunier, Vincent;Bdikin, Igor K.;Gracio, Jose;Balke, Nina;Jesse, Stephen;Tselev, Alexander;Agarwal, Pratul K.;Sumpter, Bobby G.;Kalinin, Sergei V.;Kholkin, Andrei L.;
7:2:31:11     Nanoscale piezoelectric and ferroelectric behaviors of seashell by piezoresponse force microscopy
DOI:10.1063/1.4801982  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Li, Tao;Zeng, Kaiyang;
7:2:31:12     In situ studies of nanoscale electromechanical behavior of nacre under flexural stresses using band excitation PFM
DOI:10.1016/j.actbio.2013.01.003  JN:ACTA BIOMATERIALIA  PY:2013
  TC:2  AU: Li, Tao;Chen, Lei;Zeng, Kaiyang;
7:2:31:13     Piezoelectric properties and surface potential of green abalone shell studied by scanning probe microscopy techniques
DOI:10.1016/j.actamat.2011.03.001  JN:ACTA MATERIALIA  PY:2011
  TC:13  AU: Li, T.;Zeng, K.;
7:2:31:14     A coupled analysis of the piezoresponse force microscopy signals
DOI:10.1063/1.3657143  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Wang, J. H.;Chen, C. Q.;
7:2:31:15     Paraelectric Response of Water in the Range0-100 degrees C
DOI:10.1080/00150193.2014.895217  JN:FERROELECTRICS  PY:2014
  TC:1  AU: del Valle, J. C.;Arago, C.;Marques, M. I.;Gonzalo, J. A.;
7:2:31:16     Atomic vapor deposition of bismuth titanate thin films
DOI:10.1063/1.4801985  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Deepak, Nitin;Zhang, Panfeng F.;Keeney, Lynette;Pemble, Martyn E.;Whatmore, Roger W.;
7:2:31:17     Mechanical stress modified ferroelectric aging behavior
DOI:10.1063/1.4801978  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Xu, Tingting;Kan, Yi;Jin, Yaming;Sun, Hui;Du, Yingchao;Wu, Xiumei;Bo, Huifeng;Cai, Wei;Huang, Fengzhen;Lu, Xiaomei;Zhu, Jinsong;
7:2:31:18     Piezoelectricity in collagen type II fibrils measured by scanning probe microscopy
DOI:10.1063/1.4891400  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Denning, D.;Kilpatrick, J. I.;Hsu, T.;Habelitz, S.;Fertala, A.;Rodriguez, B. J.;
7:2:32:1     BiFeO3 thin films of (111)-orientation deposited on SrRuO3 buffered Pt/TiO2/SiO2/Si(100) substrates
DOI:10.1016/j.actamat.2009.11.011  JN:ACTA MATERIALIA  PY:2010
  TC:72  AU: Wu, Jiagang;Wang, John;
7:2:32:2     Improved electric behaviors of the Pt/Bi1-xLaxFe0.92Mn0.08O3/n(+)-Si heterostructure for nonvolatile ferroelectric random-access memory
DOI:10.1039/c3tc30250d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:4  AU: Zhang, Jinzhong;Duan, Zhihua;Zhang, Hao;Han, Meijie;Li, Yawei;Hu, Zhigao;Chu, Junhao;
7:2:32:3     Ferroelectric and Impedance Behavior of La- and Ti-Codoped BiFeO3 Thin Films
DOI:10.1111/j.1551-2916.2010.03816.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:31  AU: Wu, Jiagang;Wang, John;
7:2:32:4     Multiferroic and fatigue behavior of silicon-based bismuth ferrite sandwiched structure
DOI:10.1039/c0jm04026f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:11  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:32:5     Charge defects-induced electrical properties in bismuth ferrite bilayered thin films
DOI:10.1016/j.materresbull.2013.03.042  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Wu, Jiagang;Zhang, Binyu;Wang, Xiaopeng;Wang, John;Zhu, Jianguo;Xiao, Dingquan;
7:2:32:6     A giant polarization value of Zn and Mn co-modified bismuth ferrite thin films
DOI:10.1063/1.4790380  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:14  AU: Wu, Jiagang;Qiao, Sha;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:32:7     Impedance spectroscopy of bilayered bismuth ferrite thin films
DOI:10.1063/1.3636390  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:32:8     A large polarization in Ce-modified bismuth ferrite thin films
DOI:10.1063/1.3596825  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Wang, Yuanyu;
7:2:32:9     Elimination of domain backswitching in BiFe0.95Mn0.05O3 thin films by lowering the layer thickness
DOI:10.1063/1.3698321  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Liu, Jingjing;Yin, Zaimei;Zhang, Hongyan;Sun, Wen;Jiang, Bo;Hu, Guangda;
7:2:32:10     Effect of heterogeneous interface on the microwave dielectric properties of Ca(Mg1/3Nb2/3)O-3/CaTiO3 thin films
DOI:10.1016/j.apsusc.2012.06.010  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:1  AU: Zhou, Jing;Li, Runrun;Li, Ru;Chen, Wen;
7:2:32:11     Effect of BNBTKNN on the electrical properties of bismuth ferrite thin films
DOI:10.1016/j.ceramint.2011.07.061  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Wang, Yuanyu;
7:2:32:12     Effect of (Bi, La)(Fe, Zn)O-3 thickness on the microstructure and multiferroic properties of BiFeO3 thin films
DOI:10.1063/1.4764340  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Wu, Jiagang;Xiao, Dingquan;Zhu, Jianguo;
7:2:32:13     Bismuth ferrite composite thin films
DOI:10.1007/s00339-013-7686-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Wu, Jiagang;Zhang, Binyu;Wang, Xiaopeng;
7:2:32:14     Structural, dielectric and piezoelectric properties of xBiFeO(3)-(1-x) BaTi0.9Zr0.1O3 ceramics
DOI:10.1016/j.ceramint.2013.10.075  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Zhang, Jiaqi;Wang, Lei;Bian, Liang;Xu, Jinbao;Chang, Aiming;
7:2:32:15     Effect of Substrate Temperature on Electrical Properties of BiFeO3 Thin Films Prepared by Sputtering Method
DOI:10.1080/00150193.2013.839291  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Chen, Sen;Yang, Shenghong;Zhang, Yueli;
7:2:32:16     Effect of (Bi,Gd)FeO3 Layer Thickness on the Microstructure and Electrical Properties of BiFeO3 Thin Films
DOI:10.1111/j.1551-2916.2011.04633.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:32:17     Structure and Electrical Properties of Rare Earth Substituted Bi(Fe0.975Cu0.025)O3-delta Thin Films Prepared by Chemical Solution Deposition
DOI:10.1080/10584587.2012.660425  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Raghavan, C. M.;Kim, J. W.;Do, D.;Kim, S. S.;Kim, M. H.;Song, T. K.;
7:2:32:18     Valence-driven electrical behavior of manganese-modified bismuth ferrite thin films
DOI:10.1063/1.3596826  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:32:19     Combined effects of bilayer structure and ion substitutions on bismuth ferrite thin films
DOI:10.1063/1.3563573  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:32:20     Epitaxial SrRuO3/BiFeO3/SrRuO3 heterostructure sputtered at low temperature
DOI:10.1016/j.jcrysgro.2010.12.024  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:6  AU: Zhao, Q. X.;Ma, J. K.;Wei, D. Y.;Wang, K. M.;Li, X. H.;Zhang, X. Y.;Liu, B. T.;
7:2:32:21     Microstructure and texture development in single layered and heterolayered PZT thin films
DOI:10.1007/s10853-010-4712-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:2  AU: Kartawidjaja, Fransiska Cecilia;Varatharajan, Anbusathaiah;Valanoor, Nagarajan;Wang, John;
7:2:32:22     Simulation of the initial polarization curves and hysteresis loops for ferroelectric films by an extensive time-dependent Ginzburg-Landau model
DOI:10.1007/s10853-010-5137-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:0  AU: Wang, Ying-Long;Wang, Xing-Yuan;Chu, Li-Zhi;Deng, Ze-Chao;Ding, Xue-Cheng;Liang, Wei-Hua;Zhang, Peng-Cheng;Liu, Lin;Liu, Bao-Ting;Fu, Guang-Sheng;
7:2:32:23     Effect of bilayer structure and a SrRuO3 buffer layer on ferroelectric properties of BiFeO3 thin films
DOI:10.1007/s00339-012-7064-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:1  AU: Wu, Jiagang;Qiao, Sha;Pu, Chaohui;Xiao, Dingquan;Wang, John;Zhu, Jianguo;
7:2:32:24     Compositionally graded bismuth ferrite thin films
DOI:10.1016/j.jallcom.2011.05.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:32:25     Temperature and frequency dependences of the electric properties of CLBO crystals
DOI:10.1016/j.jallcom.2013.12.221  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Wang, Zhufeng;Wang, Zengmei;Yin, Yongxin;Cheng, Zhenxiang;Kimura, Hideo;Guo, Xinli;Chen, Jian;Chen, Ji;Wang, Yiping;
7:2:32:26     The use of fractional derivation in modeling ferroelectric dynamic hysteresis behavior over large frequency bandwidth
DOI:10.1063/1.3393814  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Guyomar, D.;Ducharne, B.;Sebald, G.;
7:2:33:1     Direct Observation of Capacitor Switching Using Planar Electrodes
DOI:10.1002/adfm.201000475  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:39  AU: Balke, Nina;Gajek, Martin;Tagantsev, Alexander K.;Martin, Lane W.;Chu, Ying-Hao;Ramesh, Ramamoorthy;Kalinin, Sergei V.;
7:2:33:2     Nanoscale Dynamics of Superdomain Boundaries in Single-Crystal BaTiO3 Lamellae
DOI:10.1002/adma.201203226  JN:ADVANCED MATERIALS  PY:2013
  TC:6  AU: Sharma, Pankaj;McQuaid, Raymond G. P.;McGilly, Leo J.;Gregg, J. Marty;Gruverman, Alexei;
7:2:33:3     Non-Kolmogorov-Avrami-Ishibashi Switching Dynamics in Nanoscale Ferroelectric Capacitors
DOI:10.1021/nl9038339  JN:NANO LETTERS  PY:2010
  TC:23  AU: Kim, Yunseok;Han, Hee;Lee, Woo;Baik, Sunggi;Hesse, Dietrich;Alexe, Marin;
7:2:33:4     Nanoscale Observation of Time-Dependent Domain Wall Pinning as the Origin of Polarization Fatigue
DOI:10.1002/adfm.201102685  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:15  AU: Yang, Sang Mo;Kim, Tae Heon;Yoon, Jong-Gul;Noh, Tae Won;
7:2:33:5     Accessing intermediate ferroelectric switching regimes with time-resolved transmission electron microscopy
DOI:10.1063/1.4746082  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Winkler, Christopher R.;Jablonski, Michael L.;Damodaran, Anoop R.;Jambunathan, Karthik;Martin, Lane W.;Taheri, Mitra L.;
7:2:33:6     Mechanism of Polarization Fatigue in BiFeO3
DOI:10.1021/nn303090k  JN:ACS NANO  PY:2012
  TC:13  AU: Zou, Xi;You, Lu;Chen, Weigang;Ding, Hui;Wu, Di;Wu, Tom;Chen, Lang;Wang, Junling;
7:2:33:7     Polarization switching in quasiplanar BiFeO3 capacitors
DOI:10.1063/1.3479911  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: You, Lu;Liang, Elvin;Guo, Rui;Wu, Di;Yao, Kui;Chen, Lang;Wang, Junling;
7:2:33:8     X-ray nanodiffraction of tilted domains in a poled epitaxial BiFeO3 thin film
DOI:10.1063/1.3665627  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Hruszkewycz, S. O.;Folkman, C. M.;Highland, M. J.;Holt, M. V.;Baek, S. H.;Streiffer, S. K.;Baldo, P.;Eom, C. B.;Fuoss, P. H.;
7:2:33:9     Real-Time Observation of Local Strain Effects on Nonvolatile Ferroelectric Memory Storage Mechanisms
DOI:10.1021/nl501304e  JN:NANO LETTERS  PY:2014
  TC:0  AU: Winkler, Christopher R.;Jablonski, Michael L.;Ashraf, Khalid;Damodaran, Anoop R.;Jambunathan, Karthik;Hart, James L.;Wen, Jianguo G.;Miller, Dean J.;Martin, Lane W.;Salahuddin, Sayeef;Taheri, Mitra L.;
7:2:33:10     Switching kinetics in epitaxial BiFeO3 thin films
DOI:10.1063/1.3392884  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Pantel, Daniel;Chu, Ying-Hao;Martin, Lane W.;Ramesh, Ramamoorthy;Hesse, Dietrich;Alexe, Marin;
7:2:33:11     Phase field model of domain dynamics in micron scale, ultrathin ferroelectric films: Application for multiferroic bismuth ferrite
DOI:10.1063/1.4754800  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Ashraf, Khalid;Salahuddin, Sayeef;
7:2:33:12     X-ray diffraction studies of stripelike ferroelectric domains in thin films of BiFeO3
DOI:10.1103/PhysRevB.89.214104  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Lee, J. C. T.;Damodaran, A. R.;Ramesh, R.;Martin, L. W.;Abbamonte, P.;
7:2:33:13     Tunable oxygen vacancy configuration by strain engineering in perovskite ferroelectrics from first-principles study
DOI:10.1063/1.4824215  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Yang, Q.;Cao, J. X.;Zhou, Y. C.;Zhang, Y.;Ma, Y.;Lou, X. J.;
7:2:33:14     The Effect of Antinotches on Domain Wall Mobility in Single Crystal Ferroelectric Nanowires
DOI:10.1021/nl101830d  JN:NANO LETTERS  PY:2010
  TC:7  AU: McQuaid, R. G. P.;Chang, L. -W.;Gregg, J. M.;
7:2:33:15     Exploration of the intrinsic inertial response of ferroelectric domain walls via molecular dynamics simulations
DOI:10.1063/1.4832421  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Liu, Shi;Grinberg, Ilya;Rappe, Andrew M.;
7:2:33:16     Twin wall distortions through structural investigation of epitaxial BiFeO3 thin films
DOI:10.1557/jmr.2011.327  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:4  AU: Folkman, Chad M.;Baek, Seung-Hyub;Eom, Chang-Beom;
7:2:33:17     Growth temperature dependent dielectric properties of BiFeO3 thin films deposited on silica glass substrates
DOI:10.1016/j.tsf.2012.02.082  JN:THIN SOLID FILMS  PY:2012
  TC:8  AU: Ahmed, Taimur;Vorobiev, Andrei;Gevorgian, Spartak;
7:2:33:18     Reinterpretation of the bond-valence model with bond-order formalism: An improved bond-valence-based interatomic potential for PbTiO3
DOI:10.1103/PhysRevB.88.104102  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Liu, Shi;Grinberg, Ilya;Takenaka, Hiroyuki;Rappe, Andrew M.;
7:2:33:19     Magnetic behavior in LiNbO3 nanocrystallites caused by oxygen vacancies
DOI:10.1016/j.jmmm.2013.12.029  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Diaz-Moreno, C. A.;Farias-Mancilla, R.;Matutes-Aquino, J. A.;Elizalde-Galindo, J.;Espinosa-Magana, F.;Gonzalez-Hernandez, J.;Hurtado-Macias, A.;
7:2:34:1     Ab initio study of ferroelectric closure domains in ultrathin PbTiO3 films
DOI:10.1103/PhysRevB.81.144116  JN:PHYSICAL REVIEW B  PY:2010
  TC:24  AU: Shimada, Takahiro;Tomoda, Shogo;Kitamura, Takayuki;
7:2:34:2     Multiferroic Grain Boundaries in Oxygen-Deficient Ferroelectric Lead Titanate
DOI:10.1021/nl502471a  JN:NANO LETTERS  PY:2015
  TC:1  AU: Shimada, Takahiro;Wang, Jie;Ueda, Taku;Uratani, Yoshitaka;Arisue, Kou;Mrovec, Matous;Elsaesser, Christian;Kitamura, Takayuki;
7:2:34:3     Hybrid Hartree-Fock density functional study of charged point defects in ferroelectric PbTiO3
DOI:10.1103/PhysRevB.87.174111  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Shimada, Takahiro;Ueda, Taku;Wang, Jie;Kitamura, Takayuki;
7:2:34:4     Absence of Ferroelectric Critical Size in Ultrathin PbTiO3 Nanotubes: A Density-Functional Theory Study
DOI:10.1103/PhysRevLett.108.067601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:13  AU: Shimada, Takahiro;Wang, Xiaoyuan;Kondo, Yoshiaki;Kitamura, Takayuki;
7:2:34:5     Emergence of ferromagnetism at a vacancy on a non-magnetic ferroelectric PbTiO3 surface: A first-principles study
DOI:10.1016/j.actamat.2012.08.007  JN:ACTA MATERIALIA  PY:2012
  TC:6  AU: Shimada, Takahiro;Uratani, Yoshitaka;Kitamura, Takayuki;
7:2:34:6     The origin of magnetism in perovskite ferroelectric ABO(3) nanoparticles (A = K,Li; B = Ta,Nb or A = Ba,Sr,Pb; B = Ti)
DOI:10.1063/1.4748319  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Bahoosh, S. G.;Wesselinowa, J. M.;
7:2:34:7     First-principles study of the interplay between grain boundaries and domain walls in ferroelectric PbTiO3
DOI:10.1103/PhysRevB.83.064110  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Marton, Pavel;Shimada, Takahiro;Kitamura, Takayuki;Elsaesser, Christian;
7:2:34:8     Ferroelectric domain structure of PbZr0.35Ti0.65O3 single crystals by piezoresponse force microscopy
DOI:10.1063/1.3623768  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Bdikin, I. K.;Perez, J. A.;Coondoo, I.;Senos, A. M. R.;Mantas, P. Q.;Kholkin, A. L.;
7:2:34:9     Coexistence of rectilinear and vortex polarizations at twist boundaries in ferroelectric PbTiO3 from first principles
DOI:10.1103/PhysRevB.83.094121  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Shimada, Takahiro;Wang, Xiaoyuan;Tomoda, Shogo;Marton, Pavel;Elsaesser, Christian;Kitamura, Takayuki;
7:2:34:10     Vacancy-driven ferromagnetism in ferroelectric PbTiO3
DOI:10.1063/1.4704362  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Shimada, Takahiro;Uratani, Yoshitaka;Kitamura, Takayuki;
7:2:34:11     Charged vacancies in ferroelectric PbTiO3: Formation energies, optimal Fermi region, and influence on local polarization
DOI:10.1103/PhysRevB.84.064112  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Yao, Yanpeng;Fu, Huaxiang;
7:2:34:12     Upward ferroelectric self-polarization induced by compressive epitaxial strain in (001) BaTiO3 films
DOI:10.1063/1.4807794  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Chen, Jiangpeng;Luo, Ying;Ou, Xin;Yuan, Guoliang;Wang, Yiping;Yang, Ying;Yin, Jiang;Liu, Zhiguo;
7:2:34:13     Upward ferroelectric self-poling in (001) oriented PbZr0.2Ti0.8O3 epitaxial films with compressive strain
DOI:10.1063/1.4840595  JN:AIP ADVANCES  PY:2013
  TC:8  AU: Luo, Ying;Li, Xueyan;Chang, Lei;Gao, Wenxiu;Yuan, Guoliang;Yin, Jiang;Liu, Zhiguo;
7:2:34:14     Multiferroic Properties of Nanocrystalline PbTiO3 Ceramics
DOI:10.1111/j.1551-2916.2010.03691.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Wang, Min;Tan, Guo-Long;Zhang, Qingjie;
7:2:34:15     Temperature Gradient Introduced Ferroelectric Self-Poling in BiFeO3 Ceramics
DOI:10.1111/jace.12580  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Chen, Xiaomin;Zou, Yuhong;Yuan, Guoliang;Zeng, Min;Liu, J. M.;Yin, Jiang;Liu, Zhiguo;
7:2:34:16     Anion vacancy-driven magnetism in incipient ferroelectric SrTiO(3) and KTaO(3) nanoparticles
DOI:10.1063/1.3580478  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Eliseev, E. A.;Morozovska, A. N.;Glinchuk, M. D.;Blinc, R.;
7:2:34:17     Vacancy-driven magnetism in nonmagnetic double perovskite Sr2AlNbO6: A first-principles study
DOI:10.1016/j.jallcom.2014.01.176  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Li, Y. D.;Wang, C. C.;Cheng, R. L.;Lu, Q. L.;Huang, S. G.;Liu, C. S.;
7:2:34:18     Multiferroic response of nanocrystalline lithium niobate
DOI:10.1063/1.3673434  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Diaz-Moreno, Carlos;Farias, Rurik;Hurtado-Macias, Abel;Elizalde-Galindo, Jose;Hernandez-Paz, Juan;
7:2:34:19     Magnetic structure of double perovskites Ca2MWO6 (M = Co, Ni): A first principles study
DOI:10.1016/j.jmmm.2010.01.019  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:5  AU: Dutta, Alo;Sinha, T. P.;
7:2:35:1     Skin Layer of BiFeO3 Single Crystals
DOI:10.1103/PhysRevLett.106.236101  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:26  AU: Marti, Xavi;Ferrer, Pilar;Herrero-Albillos, Julia;Narvaez, Jackeline;Holy, Vaclav;Barrett, Nick;Alexe, Marin;Catalan, Gustau;
7:2:35:2     Giant Effect of Uniaxial Pressure on Magnetic Domain Populations in Multiferroic Bismuth Ferrite
DOI:10.1103/PhysRevLett.107.067203  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:12  AU: Ramazanoglu, M.;Ratcliff, W., II;Yi, H. T.;Sirenko, A. A.;Cheong, S-W.;Kiryukhin, V.;
7:2:35:3     Surface phase transitions in BiFeO3 below room temperature
DOI:10.1103/PhysRevB.85.184104  JN:PHYSICAL REVIEW B  PY:2012
  TC:15  AU: Jarrier, R.;Marti, X.;Herrero-Albillos, J.;Ferrer, P.;Haumont, R.;Gemeiner, P.;Geneste, G.;Berthet, P.;Schuelli, T.;Cevc, P.;Blinc, R.;Wong, Stanislaus S.;Park, Tae-Jin;Alexe, M.;Carpenter, M. A.;Scott, J. F.;Catalan, G.;Dkhil, B.;
7:2:35:4     Photoluminescence and time-resolved spectroscopy in multiferroic BiFeO3: Effects of electric fields and sample aging
DOI:10.1063/1.4808450  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Anshul, Avneesh;Kumar, Ashok;Gupta, Bipin K.;Kotnala, R. K.;Scott, J. F.;Katiyar, R. S.;
7:2:35:5     Electric control of magnon frequencies and magnetic moment of bismuth ferrite thin films at room temperature
DOI:10.1063/1.3624845  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:14  AU: Kumar, Ashok;Scott, J. F.;Katiyar, R. S.;
7:2:35:6     Melting of Bi Sublattice in Nanosized BiFeO3 Perovskite by Resonant X-Ray Diffraction
DOI:10.1103/PhysRevLett.105.185501  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:13  AU: Petkov, V.;Selbach, S. M.;Einarsrud, M-A;Grande, T.;Shastri, S. D.;
7:2:35:7     Magnon Raman spectroscopy and in-plane dielectric response in BiFeO3: Relation to the Polomska transition
DOI:10.1103/PhysRevB.85.224410  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Kumar, Ashok;Scott, J. F.;Katiyar, R. S.;
7:2:35:8     Photoconductivity and photo-detection response of multiferroic bismuth iron oxide
DOI:10.1063/1.4870626  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Anshul, Avneesh;Borkar, Hitesh;Singh, Paritosh;Pal, Prabir;Kushvaha, Sunil S.;Kumar, Ashok;
7:2:35:9     Surface double-layer structure in (110) oriented BiFeO3 thin film
DOI:10.1063/1.4902113  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yang, Tieying;Wang, Can;Zhang, Xingmin;Feng, Yu;Guo, Haizhong;Jin, Kuijuan;Gao, Xingyu;Li, Zhong;Li, Xiaolong;
7:2:35:10     Local properties of the surface layer(s) of BiFeO3 single crystals
DOI:10.1063/1.4801974  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Domingo, Neus;Narvaez, Jackeline;Alexe, Marin;Catalan, Gustau;
7:2:35:11     Regular nanodomain vertex arrays in BiFeO3 single crystals
DOI:10.1103/PhysRevB.85.064104  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Berger, A.;Hesse, D.;Haehnel, A.;Arredondo, M.;Alexe, M.;
7:2:35:12     Revisiting the low-temperature dielectric properties of ZnO
DOI:10.1063/1.4896065  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Wang, Chunchang;Liu, Lina;Li, Qiuju;Huang, Shouguo;Zhang, Jian;Zheng, Jun;Cheng, Chao;
7:2:35:13     Magnetoelectric relaxation in rhombohedral LiNbO3-CoFe2O4
DOI:10.1063/1.4729933  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Han, Yemei;Liu, Yueying;Zavalij, Peter;Salamanca-Riba, Lourdes;Cantando, Elizabeth;Bergstrom, Richard, Jr.;Li, Lingxia;Wuttig, Manfred;
7:2:35:14     Non-linear dielectric properties of BiFeO3 ceramics
DOI:10.1063/1.3653471  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Curecheriu, Lavinia;Gheorghiu, Felicia;Ianculescu, Adelina;Mitoseriu, Liliana;
7:2:35:15     Direct imaging of both ferroelectric and antiferromagnetic domains in multiferroic BiFeO3 single crystal using x-ray photoemission electron microscopy
DOI:10.1063/1.3679101  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Moubah, R.;Elzo, M.;El Moussaoui, S.;Colson, D.;Jaouen, N.;Belkhou, R.;Viret, M.;
7:2:35:16     Domain Structure in the Tetragonal Phase of BaTiO3- from Bulk to Nanoparticles
DOI:10.1080/00150193.2012.671090  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Gruenebohm, A.;Gruner, M. E.;Entel, P.;
7:2:35:17     Synthesis and properties of bismuth ferrite multiferroic flowers
DOI:10.1007/s10853-013-7957-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:2  AU: Chybczynska, K.;Lawniczak, P.;Hilczer, B.;Leska, B.;Pankiewicz, R.;Pietraszko, A.;Kepinski, L.;Kaluski, T.;Cieluch, P.;Matelski, F.;Andrzejewski, B.;
7:2:35:18     Tunable dielectric characteristics of Mn-doped BiFeO3 multiferroic ceramics
DOI:10.1016/j.scriptamat.2012.10.050  JN:SCRIPTA MATERIALIA  PY:2013
  TC:1  AU: Gheorghiu, Felicia;Curecheriu, Lavinia;Ianculescu, Adelina;Calugaru, Mihai;Mitoseriu, Liliana;
7:2:35:19     Element-specific structure of materials with intrinsic disorder by high-energy resonant x-ray diffraction and differential atomic pair-distribution functions: A study of PtPd nanosized catalysts
DOI:10.1103/PhysRevB.81.165428  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Petkov, V.;Shastri, S. D.;
7:2:35:20     Domains and Domain Walls in Multiferroic Ferroelectric-Ferromagnet and Control of Its Modulation
DOI:10.1080/00150193.2010.489835  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Lykah, V. A.;
7:2:36:1     Ultrahigh Density Array of Epitaxial Ferroelectric Nanoislands on Conducting Substrates
DOI:10.1021/nl100819d  JN:NANO LETTERS  PY:2010
  TC:38  AU: Kim, Youngsuk;Han, Hee;Kim, Yunseok;Lee, Woo;Alexe, Marin;Baik, Sunggi;Kim, Jin Kon;
7:2:36:2     A Nonvolatile Memory Device Made of a Ferroelectric Polymer Gate Nanodot and a Single-Walled Carbon Nanotube
DOI:10.1021/nn1021296  JN:ACS NANO  PY:2010
  TC:32  AU: Son, Jong Yeog;Ryu, Sangwoo;Park, Yoon-Cheol;Lim, Yun-Tak;Shin, Yun-Sok;Shin, Young-Han;Jang, Hyun Myung;
7:2:36:3     BiFeO3 nanodots prepared via dip-pen lithography on Nb-doped SrTiO3 and highly ordered pyrolytic graphite substrates
DOI:10.1063/1.4817407  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Kim, Woo-Hee;Son, Jong Yeog;
7:2:36:4     Ferroelectric nanostructures fabricated by focused-ion-beam milling in epitaxial BiFeO3 thin films
DOI:10.1088/0957-4484/22/26/265303  JN:NANOTECHNOLOGY  PY:2011
  TC:14  AU: Morelli, A.;Johann, F.;Schammelt, N.;Vrejoiu, I.;
7:2:36:5     Epitaxial BiFeO3 nanostructures fabricated by differential etching of BiFeO3 films
DOI:10.1063/1.3630027  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Johann, Florian;Morelli, Alessio;Vrejoiu, Ionela;
7:2:36:6     The effects of La substitution on ferroelectric domain structure and multiferroic properties of epitaxially grown BiFeO3 thin films
DOI:10.1063/1.4822327  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Kim, Woo-Hee;Son, Jong Yeog;
7:2:36:7     Dip-Pen Lithography of BiFeO3 Nanodots
DOI:10.1111/jace.12008  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Jung, Inhwa;Son, Jong Yeog;
7:2:36:8     Colors of graphene and graphene-oxide multilayers on various substrates
DOI:10.1088/0957-4484/23/2/025708  JN:NANOTECHNOLOGY  PY:2012
  TC:14  AU: Jung, Inhwa;Rhyee, Jong-Soo;Son, Jong Yeog;Ruoff, Rodney S.;Rhee, Kyong-Yop;
7:2:36:9     Improvement of transfer characteristic for carbon nanotube field effect transistor with poly crystalline PbZrxTi1-xO3 gate by ionic liquid
DOI:10.1063/1.3665186  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Kataoka, Shogo;Arie, Takayuki;Akita, Seiji;
7:2:36:10     Ferroelectric field-effect transistors based on multi-walled carbon nanotube micron-wide stripe arrays
DOI:10.1063/1.4892536  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Song, H. J.;Liu, P. P.;Zhong, X. L.;Li, B.;Chen, T.;Wang, F.;Wang, J. B.;Zhou, Y. C.;
7:2:36:11     Ferroelectric properties of BiFeO3 nanodots shattered by atomic force microscope
DOI:10.1016/j.ceramint.2013.05.123  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Son, J. Y.;Song, H.;
7:2:36:12     Tetragonally strained BiFeO3 thin film on single crystal Rh substrate
DOI:10.1016/j.jcrysgro.2012.10.013  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:1  AU: Maeng, W. J.;Son, J. Y.;
7:2:36:13     Mask assisted fabrication of nanoislands of BiFeO3 by ion beam milling
DOI:10.1063/1.4801904  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Morelli, A.;Johann, F.;Schammelt, N.;McGrouther, D.;Vrejoiu, I.;
7:2:36:14     Ferroelectric PbTiO3 Nanodots Shattered Using Atomic Force Microscopy
DOI:10.1111/j.1551-2916.2011.05026.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Son, Jong Yeog;Jung, Inhwa;
7:2:36:15     Rearrangement of Multiferroic BiFeO3 Nanodots Smaller than 15 nm Using Atomic Force Microscopy
DOI:10.1111/jace.12674  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Meang, Wan J.;Son, Jong Y.;
7:2:36:16     Resistive switching characteristics of ferroelectric BiFeO3 nanodot prepared by dip-pen nanolithography
DOI:10.1016/j.matlet.2014.01.157  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Kim, Woo-Hee;Son, Jong Yeog;
7:2:36:17     Crystal growth of ferroelectric PbTiO3 nanocrystals on silicon substrate via intermediates
DOI:10.1016/j.materresbull.2011.12.053  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:1  AU: Chao, Chunying;Ren, Zhaohui;Liu, Zhenya;Xiao, Zhen;Xu, Gang;Wei, Xiao;Shen, Ge;Han, Gaorong;
7:2:36:18     Molecular-mediated crystal growth of PbTiO3 nanostructure on silicon substrate
DOI:10.1016/j.apsusc.2011.06.008  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:3  AU: Chao, Chunying;Ren, Zhaohui;Liu, Zhenya;Xiao, Zhen;Xu, Gang;Li, Xiang;Wei, Xiao;Shen, Ge;Han, Gaorong;
7:2:36:19     Ferroelectric domain wall motion in epitaxial PbTiO3 and BiFeO3 thin films
DOI:10.1016/j.matlet.2014.03.069  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Kim, Woo-Hee;Yoon, Sung Min;Son, Jong Yeog;
7:2:36:20     The electrical and switching properties of a metal-ferroelectric (Bi3.15Nd0.85Ti3O12)-insulator (Y2O3-stabilized ZrO2)-silicon diode
DOI:10.1063/1.3486464  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Zhang, Y.;Zhong, X. L.;Wang, J. B.;Song, H. J.;Ma, Y.;Zhou, Y. C.;
7:2:36:21     Variation in ferroelectric polarization direction of epitaxial (001) SrBi2Ta2O9 thin film induced by oxygen vacancy
DOI:10.1016/j.ceramint.2013.10.046  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Son, Jong Yeog;Maeng, Wan Joo;Kim, Woo-Hee;
7:2:36:22     Monodisperse hollow perovskite BaTiO3 nanostructures prepared by a sol gel hydrothermal method
DOI:10.1016/j.ceramint.2014.02.047  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Yang, Xin;Ren, Zhaohui;Xu, Gang;Chao, Chunying;Jiang, Shan;Deng, Shiqi;Shen, Ge;Wei, Xiao;Han, Gaorong;
7:2:36:23     Addressable Metal-Ferroelectric-Metal Nanocapacitor Arrays Fabricated by Focused Ion Beam Milling
DOI:10.1080/10584587.2012.660832  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:1  AU: Dai, Ying;Yang, Lei;Wang, Longhai;Tian, Bin;Zou, Lianying;Cheng, Hao;Huang, Danxia;
7:2:36:24     Improved Room-Temperature Ferromagnetism in Self-Assembled Disk-Like Superstructures of Fe-Doped PbTiO(3) Nanocrystals
DOI:10.1111/j.1551-2916.2010.04140.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Liu, Zhenya;Ren, Zhaohui;Wei, Xiao;Xiao, Zhen;Hou, Xiaohong;Shen, Ge;Xu, Gang;Han, Gaorong;
7:2:37:1     Preface to Special Topic: Invited Papers from the International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, Aveiro, Portugal, 2009
DOI:10.1063/1.3474648  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Kalinin, Sergei V.;Setter, Nava;Kholkin, Andrei L.;
7:2:37:2     Real-Time Direct Observations of Polarization Reversal in a Piezoelectric Crystal: Pb(Mg1/3Nb2/3)O-3-PbTiO3 Studied via In Situ Electrical Biasing Transmission Electron Microscopy
DOI:10.1103/PhysRevLett.107.187601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:17  AU: Sato, Yukio;Hirayama, Tsukasa;Ikuhara, Yuichi;
7:2:37:3     Real space mapping of polarization dynamics and hysteresis loop formation in relaxor-ferroelectric PbMg1/3Nb2/3O3-PbTiO3 solid solutions
DOI:10.1063/1.3474961  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:19  AU: Rodriguez, B. J.;Jesse, S.;Morozovska, A. N.;Svechnikov, S. V.;Kiselev, D. A.;Kholkin, A. L.;Bokov, A. A.;Ye, Z. -G.;Kalinin, S. V.;
7:2:37:4     Ferroelectric domain structures of 0.4-mu m-thick Pb(Zr,Ti)O-3 films prepared by polyvinylpyrrolidone-assisted Sol-Gel method
DOI:10.1063/1.3693042  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Yamano, Akihiro;Takata, Keiji;Kozuka, Hiromitsu;
7:2:37:5     Evolution of nanodomains under DC electrical bias in Pb(Mg1/3Nb2/3) O-3-PbTiO3: An In-situ transmission electron microscopy study
DOI:10.1063/1.4705418  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Sato, Yukio;Hirayama, Tsukasa;Ikuhara, Yuichi;
7:2:37:6     Lateral piezoelectric response across ferroelectric domain walls in thin films
DOI:10.1063/1.3474953  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:14  AU: Guyonnet, J.;Bea, H.;Paruch, P.;
7:2:37:7     Domain evolution processes during poling of a near-morphotropic Pb(Zr, Ti)O-3 ceramic
DOI:10.1063/1.4804955  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Kim, K. L.;Tsou, N. T.;Huber, J. E.;
7:2:37:8     Piezoresponse force microscopy studies of the triglycine sulfate-based nanofibers
DOI:10.1063/1.3474966  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Isakov, D. V.;Gomes, E. de Matos;Almeida, B. G.;Bdikin, I. K.;Martins, A. M.;Kholkin, A. L.;
7:2:37:9     Local probing of magnetoelectric coupling in multiferroic composites of BaFe12O19-BaTiO3
DOI:10.1063/1.3474967  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:16  AU: Karpinsky, D. V.;Pullar, R. C.;Fetisov, Y. K.;Kamentsev, K. E.;Kholkin, A. L.;
7:2:37:10     Investigation of the ferroelectric-relaxor transition in PbMg1/3Nb2/3O3-PbTiO3 ceramics by piezoresponse force microscopy
DOI:10.1063/1.3474962  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:15  AU: Shvartsman, V. V.;Kholkin, A. L.;
7:2:37:11     Ferroelectric microdomains and microdomain arrays recorded in strontium-barium niobate crystals in the field of atomic force microscope
DOI:10.1063/1.3474965  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:14  AU: Volk, Tatiana R.;Simagina, Liliya V.;Gainutdinov, Radmir V.;Tolstikhina, Alla L.;Ivleva, Lyudmila I.;
7:2:37:12     Monoclinic nanodomains in morphotropic phase boundary Pb(Mg1/3Nb2/3)O-3-PbTiO3
DOI:10.1063/1.4866791  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Sato, Y.;Hirayama, T.;Ikuhara, Y.;
7:2:37:13     Correlation of electron backscatter diffraction and piezoresponse force microscopy for the nanoscale characterization of ferroelectric domains in polycrystalline lead zirconate titanate
DOI:10.1063/1.3474940  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Burnett, T. L.;Weaver, P. M.;Blackburn, J. F.;Stewart, M.;Cain, M. G.;
7:2:37:14     Analysis of the degradation induced by focused ion Ga3+ beam for the realization of piezoelectric nanostructures
DOI:10.1063/1.3474963  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Remiens, D.;Liang, R. H.;Soyer, C.;Deresmes, D.;Troadec, D.;Quignon, S.;Da Costa, A.;Desfeux, R.;
7:2:37:15     Second harmonic generation in microdomain gratings fabricated in strontium-barium niobate crystals with an atomic force microscope
DOI:10.1063/1.3624800  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Simagina, L. V.;Mishina, E. D.;Semin, S. V.;Ilyin, N. A.;Volk, T. R.;Gainutdinov, R. V.;Ivleva, L. I.;
7:2:37:16     Microdomain Arrays Fabricated in Strontium-Barium Niobate Crystals by Microscopic Methods
DOI:10.1080/00150193.2013.776360  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Volk, T. R.;Gainutdinov, R. V.;Bodnarchuk, Ya. V.;Simagina, L. V.;Mishina, E. D.;Ilyin, N. A.;Artemov, V. V.;Ivleva, L. I.;
7:2:37:17     Drive frequency dependent phase imaging in piezoresponse force microscopy
DOI:10.1063/1.3474956  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Bo, Huifeng;Kan, Yi;Lu, Xiaomei;Liu, Yunfei;Peng, Song;Wang, Xiaofei;Cai, Wei;Xue, Ruoshi;Zhu, Jinsong;
7:2:37:18     Production and PFM Characterization of Barium Titanate Nanofibers
DOI:10.1080/00150193.2012.676950  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Sa, P.;Bdikin, I.;Almeida, B.;Rolo, A. G.;Isakov, D.;
7:2:37:19     Diffraction theory of nanotwin superlattices with low symmetry phase: Adaptive diffraction of imperfect nanotwin superlattices
DOI:10.1080/14786430903147106  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:4  AU: Rao, Wei-Feng;Wang, Yu U.;
7:2:38:1     Universal Polarization Switching Behavior of Disordered Ferroelectrics
DOI:10.1002/adfm.201102841  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:16  AU: Genenko, Yuri A.;Zhukov, Sergey;Yampolskii, Sergey V.;Schuetrumpf, Joerg;Dittmer, Robert;Jo, Wook;Kungl, Hans;Hoffmann, Michael J.;von Seggern, Heinz;
7:2:38:2     Dynamics of polarization reversal in virgin and fatigued ferroelectric ceramics by inhomogeneous field mechanism
DOI:10.1103/PhysRevB.82.014109  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Zhukov, Sergey;Genenko, Yuri A.;Hirsch, Ofer;Glaum, Julia;Granzow, Torsten;von Seggern, Heinz;
7:2:38:3     Statistical electric field and switching time distributions in PZT 1Nb2Sr ceramics: Crystal- and microstructure effects
DOI:10.1063/1.4860335  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhukov, Sergey;Kungl, Hans;Genenko, Yuri A.;von Seggern, Heinz;
7:2:38:4     Strategies for Fast-Switching in All-Polymer Field Effect Transistors
DOI:10.1002/adfm.201303374  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:4  AU: Senanayak, Satyaprasad P.;Narayan, K. S.;
7:2:38:5     Experimental and theoretical investigation on polarization reversal in unfatigued lead-zirconate-titanate ceramic
DOI:10.1063/1.3380844  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:16  AU: Zhukov, Sergey;Genenko, Yuri A.;von Seggern, Heinz;
7:2:38:6     Universality of Polarization Switching Dynamics in Ferroelectric Capacitors Revealed by 5D Piezoresponse Force Microscopy
DOI:10.1002/adfm.201300079  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:6  AU: Kim, Yunseok;Lu, Xiaoli;Jesse, Stephen;Hesse, Dietrich;Alexe, Marin;Kalinin, Sergei V.;
7:2:38:7     Effect of bipolar electric fatigue on polarization switching in lead-zirconate-titanate ceramics
DOI:10.1063/1.3452326  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Zhukov, Sergey;Fedosov, Sergey;Glaum, Julia;Granzow, Torsten;Genenko, Yuri A.;von Seggern, Heinz;
7:2:38:8     Two-step polarization reversal in biased ferroelectrics
DOI:10.1063/1.4881835  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Daniels, John E.;Cozzan, Clayton;Ukritnukun, Supphatuch;Tutuncu, Goknur;Andrieux, Jerome;Glaum, Julia;Dosch, Chris;Jo, Wook;Jones, Jacob L.;
7:2:38:9     Switching of Ferroelectrics Without Domains
DOI:10.1002/adma.201003264  JN:ADVANCED MATERIALS  PY:2010
  TC:11  AU: Scott, James F.;
7:2:38:10     Self-consistent model of polarization switching kinetics in disordered ferroelectrics
DOI:10.1063/1.4818951  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Genenko, Yuri A.;Wehner, Jens;von Seggern, Heinz;
7:2:38:11     Polarization switching properties of spray deposited CsNO3: PVA composite films
DOI:10.1007/s00339-010-5699-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:6  AU: Nautiyal, Arvind;Sekhar, K. C.;Pathak, N. P.;Dabra, Navneet;Hundal, Jasbir S.;Nath, R.;
7:2:38:12     Analysis of ferroelectric polarization switching in (NH4)(0.39)K0.61NO3 films using nucleation limited switching model
DOI:10.1063/1.3457228  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Dabra, Navneet;Hundal, Jasbir S.;Nautiyal, A.;Sekhar, K. C.;Nath, R.;
7:2:38:13     Study of domain reversal and its field-dependence in epitaxial BaTiO3 thin films
DOI:10.1063/1.3410795  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Li, Jianheng;Liu, Zhifu;Wessels, B. W.;
7:2:38:14     Electrical measurements of dielectric nonlinearities in ferroelectric bilayer thin films
DOI:10.1063/1.4792601  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Salev, Pavel;Meisami-Azad, Mandana;Grigoriev, Alexei;
7:2:38:15     Response delay caused by dielectric relaxation of polymer insulators for organic transistors and resolution method
DOI:10.1063/1.4747804  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Suemori, Kouji;Kamata, Toshihide;
7:2:38:16     Role of internal field and exhaustion in ferroelectric switching
DOI:10.1063/1.4856235  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Viola, Giuseppe;Chong, Kok Boon;Guiu, Frank;Reece, Michael John;
7:2:38:17     Electric field inhomogeneity as a cause for fatigue in lead zirconate titanate ferroelectrics
DOI:10.1016/j.ceramint.2011.03.015  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:0  AU: Cao, Jiang-Li;Peng, Liang;Ren, Yan-Bo;Lei, Rong;Qiao, Lijie;Gu, Hong-Wei;Li, Tao;Guo, Dong;Yue, Zhenxing;
7:2:38:18     Dynamics of ferroelectric switching of [H3CNH3](5)[ Bi2Br11]
DOI:10.1063/1.3677994  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Wojtas, Maciej;Reece, Michael J.;
7:2:38:19     Study of ferroelectric properties of spray pyrolysis deposited cesium nitrate films
DOI:10.1016/j.tsf.2010.03.100  JN:THIN SOLID FILMS  PY:2010
  TC:2  AU: Nautiyal, Arvind;Sekhar, K. C.;Pathak, N. P.;Nath, R.;
7:2:39:1     Surface Domain Structures and Mesoscopic Phase Transition in Relaxor Ferroelectrics
DOI:10.1002/adfm.201002582  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:43  AU: Kholkin, Andrei;Morozovska, Anna;Kiselev, Dmitry;Bdikin, Igor;Rodriguez, Brian;Wu, Pingping;Bokov, Alexei;Ye, Zuo-Guang;Dkhil, Brahim;Chen, Long-Qing;Kosec, Marija;Kalinin, Sergei V.;
7:2:39:2     Direct evidence of mesoscopic dynamic heterogeneities at the surfaces of ergodic ferroelectric relaxors
DOI:10.1103/PhysRevB.81.064107  JN:PHYSICAL REVIEW B  PY:2010
  TC:34  AU: Kalinin, S. V.;Rodriguez, B. J.;Budai, J. D.;Jesse, S.;Morozovska, A. N.;Bokov, A. A.;Ye, Z. -G.;
7:2:39:3     Piezoresponse force microscopy studies on the domain structures and local switching behavior of Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals
DOI:10.1063/1.4745979  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Li, Qian;Liu, Yun;Withers, Ray L.;Wan, Yuhui;Li, Zhenrong;Xu, Zhuo;
7:2:39:4     Observation of short-lived local polar states induced by applied tip biases in BaTiO3-based relaxor ferroelectric ceramics
DOI:10.1063/1.4813541  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Li, Qian;Liu, Yun;Cheng, Zhao;Bian, Jianjiang;Chen, Hua;Withers, Ray L.;
7:2:39:5     Fully-inverted piezoresponse hysteresis loops mediated by charge injection in 0.29Pb(In1/2Nb1/2)O-3-0.44Pb(Mg1/3Nb2/3)O-3-0.27PbTiO(3) single crystals
DOI:10.1063/1.3562034  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Li, Qian;Liu, Yun;Schiemer, Jason;Smith, Paul;Li, Zhenrong;Withers, Ray L.;Xu, Zhuo;
7:2:39:6     Macroscopic and local piezoelectric properties of Pb(Mg1/3Nb2/3)O-3-PbTiO3 single crystals exhibiting giant piezoelectric response
DOI:10.1063/1.4801964  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Shvartsman, V. V.;Kholkin, A. L.;Raevski, I. P.;Raevskaya, S. I.;Savenko, F. I.;Emelyanov, A. S.;
7:2:39:7     Electrochemical strain microscopy of silica glasses
DOI:10.1063/1.4891349  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Proksch, R.;
7:2:39:8     Phase diagram and domain splitting in thin ferroelectric films with incommensurate phase
DOI:10.1103/PhysRevB.81.195437  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Morozovska, A. N.;Eliseev, E. A.;Wang, JianJun;Svechnikov, G. S.;Vysochanskii, Yu. M.;Gopalan, Venkatraman;Chen, Long-Qing;
7:2:39:9     Local domain engineering in relaxor 0.77PbMg(1/3)Nb(2/3)O(3)-0.23PbSc(1/2)Nb(1/2)O(3) single crystals
DOI:10.1063/1.3624812  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Bdikin, I. K.;Gracio, J.;Kiselev, D. A.;Raevskaya, S. I.;Raevski, I. P.;Prosandeev, S. A.;Kholkin, A. L.;
7:2:39:10     Piezoresponse force microscopic study of ferroelectric (1-x)Pb(Sc1/2Nb1/2)O-3-xPbTiO(3) and Pb(Sc1/2Nb1/2)O-3 single crystals
DOI:10.1063/1.4746083  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Guo, H. Y.;Bing, Y. H.;Ye, Z. -G.;
7:2:39:11     Dielectric and Heat Capacity Study of (Pb(Mg1/3Nb2/3)O-3)(0.74)-(PbTiO3)(0.26) Ferroelectric Relaxor Near the Cubic-Tetragonal-Rhombohedral Triple Point
DOI:10.1080/00150193.2012.675268  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Novak, Nikola;Cordoyiannis, George;Kutnjak, Zdravko;
7:2:39:12     Simulation of Relaxation Times Distribution for Relaxors using Distribution of Three-Dimensional Ising-Type Clusters
DOI:10.1080/00150193.2011.577370  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Grigalaitis, R.;Lapinskas, S.;Banys, J.;Tornau, E. E.;
7:2:39:13     Theoretical Prediction and Direct Observation of Metastable Non-Polar Regions in Domain Structure of Sn2P2S6 Ferroelectrics with Triple-Well Potential
DOI:10.1080/00150193.2012.741935  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Kiselev, D. A.;Rushchanskii, K. Z.;Bdikin, I. K.;Malinkovich, M. D.;Parkhomenko, Y. N.;Vysochanskii, Yu. M.;
7:2:40:1     Magnetoelastic coupling and multiferroic ferroelastic/magnetic phase transitions in the perovskite KMnF3
DOI:10.1103/PhysRevB.85.224430  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Carpenter, M. A.;Salje, E. K. H.;Howard, Christopher J.;
7:2:40:2     Microstructure dynamics in orthorhombic perovskites
DOI:10.1103/PhysRevB.82.014113  JN:PHYSICAL REVIEW B  PY:2010
  TC:19  AU: Zhang, Zhiying;Koppensteiner, Johannes;Schranz, Wilfried;Betts, Jonathan B.;Migliori, Albert;Carpenter, Michael A.;
7:2:40:3     Strain coupling in multiferroic phase transitions of samarium yttrium manganite Sm0.6Y0.4MnO3
DOI:10.1103/PhysRevB.88.054108  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Schiemer, Jason;O'Flynn, Daniel;Balakrishnan, Geetha;Carpenter, Michael A.;
7:2:40:4     Elastic and anelastic relaxations associated with the incommensurate structure of Pr0.48Ca0.52MnO3
DOI:10.1103/PhysRevB.82.134123  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Carpenter, Michael A.;Howard, Christopher J.;McKnight, Ruth E. A.;Migliori, Albert;Betts, Jon B.;Fanelli, Victor R.;
7:2:40:5     Ferroelastic phase transitions and anelastic dissipation in the LaAlO3-PrAlO3 solid solution series
DOI:10.1103/PhysRevB.82.214111  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Thomson, R. I.;Rawson, J. M.;Howard, C. J.;Turczynski, S.;Pawlak, D. A.;Lukasiewicz, T.;Carpenter, M. A.;
7:2:40:6     Elastic anomalies due to structural phase transitions in mechanoluminescent SrAl2O4:Eu
DOI:10.1063/1.3269723  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Carpenter, M. A.;Howard, C. J.;Andrew, M. J.;McKnight, R. E. A.;Liu, Y.;Withers, R. L.;
7:2:40:7     Symmetry and strain analysis of structural phase transitions in Pr0.48Ca0.52MnO3
DOI:10.1103/PhysRevB.82.094101  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Carpenter, Michael A.;McKnight, Ruth E. A.;Howard, Christopher J.;Knight, Kevin S.;
7:2:40:8     Magnetoelastic coupling in the organic radical beta-p-NCC6F4CNSSN
DOI:10.1103/PhysRevB.84.104450  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Thomson, R. I.;Wright, E. S. L.;Rawson, J. M.;Howard, C. J.;Carpenter, M. A.;
7:2:40:9     Impact of Jahn-Teller active Mn3+ on strain effects and phase transitions in Sr0.65Pr0.35MnO3
DOI:10.1103/PhysRevB.85.104107  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Tan, Teck-Yee;Kennedy, Brendan J.;Zhou, Qingdi;Ling, Christopher D.;Miiller, Wojciech;Howard, Christopher J.;Carpenter, Michael A.;Knight, Kevin S.;
7:2:40:10     Giant domain wall response of highly twinned ferroelastic materials
DOI:10.1063/1.4757992  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Schranz, W.;Kabelka, H.;Sarras, A.;Burock, M.;
7:2:40:11     Thermoelastic and structural properties of ionically conducting cerate perovskites: (I) BaCeO3 at low temperature in the Pbnm phase
DOI:10.1016/j.ssi.2012.11.005  JN:SOLID STATE IONICS  PY:2013
  TC:5  AU: Knight, Kevin S.;Bonanos, Nikolaos;
7:2:40:12     Superelastic softening in perovskites
DOI:10.1103/PhysRevB.83.094120  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Schranz, W.;
7:2:40:13     Phase Transitions in the Brominated Ferroelectric Tris-Sarcosine Calcium Chloride
DOI:10.1002/adma.201305065  JN:ADVANCED MATERIALS  PY:2014
  TC:1  AU: Lashley, J. C.;Munns, J. H. D.;Echizen, M.;Ali, M. N.;Rowley, S. E.;Scott, J. F.;
7:2:40:14     Superelastic Softening of Ferroelastic Multidomain Crystals
DOI:10.1080/00150193.2012.671754  JN:FERROELECTRICS  PY:2012
  TC:3  AU: Schranz, W.;Kabelka, H.;Troester, A.;
7:2:40:15     Elastic coupling and anelastic relaxation associated with multiple phase transitions in para-chloroanilinium tetrachlorocuprate, [p-ClC6H4NH3](2)CuCl4
DOI:10.1016/j.matchemphys.2012.11.031  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:4  AU: Thomson, Richard I.;Rawson, Jeremy M.;Goeta, Andres;Probert, Michael R.;Coome, Jonathan A.;Hoang, Tuan K. A.;Carpenter, Michael A.;
7:2:40:16     Crystal structures, strain analysis, and physical properties of Sr0.7Ce0.3MnO3
DOI:10.1103/PhysRevB.85.174110  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Zhang, Zhaoming;Kennedy, Brendan J.;Howard, Christopher J.;Carpenter, Michael A.;Miiller, Wojciech;Knight, Kevin S.;Matsuda, Motohide;Miyake, Michihiro;
7:2:40:17     High temperature proton transport in BaCe0.95Th0.05O3 (-) (delta) perovskite
DOI:10.1016/j.ceramint.2014.03.076  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Nieto, S.;Roque-Malherbe, R.;Polanco, R.;Fuentes-Cobas, L.;Katiya, R. S.;
7:2:40:18     First-principles study of structural, electronic, vibrational, dielectric and elastic properties of tetragonal Ba2YTaO6
DOI:10.1063/1.4897452  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ganeshraj, C.;Santhosh, P. N.;
7:2:40:19     Phase diagram and phase transitions in ferroelectric tris-sarcosine calcium chloride and its brominated isomorphs
DOI:10.1103/PhysRevB.83.094102  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Jones, S. P. P.;Evans, D. M.;Carpenter, M. A.;Redfern, S. A. T.;Scott, J. F.;Straube, U.;Schmidt, V. H.;
7:2:40:20     Equation of state of CaMnO3: a combined experimental and computational study
DOI:10.1007/s00339-013-7577-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:3  AU: Paszkowicz, Wojciech;Woodley, Scott M.;Piszora, Pawel;Bojanowski, Bohdan;Pietosa, Jaroslaw;Cerenius, Yngve;Carlson, Stefan;Martin, Christine;
7:2:40:21     Investigation of structure and oxygen permeability of Ba-Ce-Co-Fe-O system
DOI:10.1016/j.materresbull.2010.06.006  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:5  AU: Li, Qiming;Zhu, Xuefeng;Yang, Weishen;
7:2:40:22     Structural phase transitions in Pr1-xLaxAlO3: Heat capacity and x-ray scattering studies
DOI:10.1103/PhysRevB.89.174106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Tachibana, Makoto;Fritsch, Katharina;Gaulin, Bruce D.;
7:2:41:1     Pressure-Induced Spin-State Transition in BiCoO3
DOI:10.1021/ja102987d  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:48  AU: Oka, Kengo;Azuma, Masaki;Chen, Wei-tin;Yusa, Hitoshi;Belik, Alexei A.;Takayama-Muromachi, Eiji;Mizumaki, Masaichiro;Ishimatsu, Naoki;Hiraoka, Nozomu;Tsujimoto, Masahiko;Tucker, Matthew G.;Attfield, J. Paul;Shimakawa, Yuichi;
7:2:41:2     Spin-State Crossover and Hyperfine Interactions of Ferric Iron in MgSiO3 Perovskite
DOI:10.1103/PhysRevLett.106.118501  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:52  AU: Hsu, Han;Blaha, Peter;Cococcioni, Matteo;Wentzcovitch, Renata M.;
7:2:41:3     Electronic structure of BiMO3 multiferroics and related oxides
DOI:10.1103/PhysRevB.81.144103  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: McLeod, J. A.;Pchelkina, Z. V.;Finkelstein, L. D.;Kurmaev, E. Z.;Wilks, R. G.;Moewes, A.;Solovyev, I. V.;Belik, A. A.;Takayama-Muromachi, E.;
7:2:41:4     Cobalt spin states and hyperfine interactions in LaCoO3 investigated by LDA+U calculations
DOI:10.1103/PhysRevB.82.100406  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Hsu, Han;Blaha, Peter;Wentzcovitch, Renata M.;Leighton, C.;
7:2:41:5     Pressure-Induced Crystal Structure and Spin-State Transitions in Magnetite (Fe3O4)
DOI:10.1021/ja305167h  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:4  AU: Ju, Sheng;Cai, Tian-Yi;Lu, Hai-Shuang;Gong, Chang-De;
7:2:41:6     A Complete High-to-Low spin state Transition of Trivalent Cobalt Ion in Octahedral Symmetry in SrCo0.5Ru0.5O3-delta
DOI:10.1021/ja4114006  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2014
  TC:5  AU: Chen, Jin-Ming;Chin, Yi-Ying;Valldor, Martin;Hu, Zhiwei;Lee, Jenn-Min;Haw, Shu-Chih;Hiraoka, Nozomu;Ishii, Hirofumi;Pao, Chih-Wen;Tsuei, Ku-Ding;Lee, Jyh-Fu;Lin, Hong-Ji;Jang, Ling-Yun;Tanaka, Arata;Chen, Chien-Te;Tjeng, Liu Hao;
7:2:41:7     Ab initio study of the giant ferroelectric distortion and pressure-induced spin-state transition in BiCoO3
DOI:10.1103/PhysRevB.83.174433  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Jia, Ting;Wu, Hua;Zhang, Guoren;Zhang, Xiaoli;Guo, Ying;Zeng, Zhi;Lin, Hai-Qing;
7:2:41:8     Cascade of Magnetic Field Induced Spin Transitions in LaCoO3
DOI:10.1103/PhysRevLett.109.037201  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:11  AU: Altarawneh, M. M.;Chern, G. -W.;Harrison, N.;Batista, C. D.;Uchida, A.;Jaime, M.;Rickel, D. G.;Crooker, S. A.;Mielke, C. H.;Betts, J. B.;Mitchell, J. F.;Hoch, M. J. R.;
7:2:41:9     An ab initio study of electronic structure and optical properties of multiferroic perovskites PbVO3 and BiCoO3
DOI:10.1016/j.optmat.2013.04.033  JN:OPTICAL MATERIALS  PY:2013
  TC:4  AU: Milosevic, Aleksandar S.;Lalic, Milan V.;Popovic, Zoran S.;Vukajlovic, Filip R.;
7:2:41:10     Rare case of magnetic Ag3+ ion: Double perovskite Cs2KAgF6
DOI:10.1103/PhysRevB.89.245117  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Jia, Ting;Zhang, Xiaoli;Liu, Ting;Fan, Fengren;Zeng, Zhi;Li, X. G.;Khomskii, D. I.;Wu, Hua;
7:2:41:11     Density functional investigations on electronic structures, magnetic ordering and ferroelectric phase transition in multiferroic Bi2NiMnO6
DOI:10.1063/1.4709401  JN:AIP ADVANCES  PY:2012
  TC:3  AU: Zhao, Hong Jian;Liu, Xiao Qiang;Chen, Xiang Ming;
7:2:41:12     First principle calculations for pressure induced structural phase transitions of Fe doped in SrMnO3
DOI:10.1016/j.commatsci.2011.11.015  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:2  AU: Luo, Benhua;Wang, Xueye;Zhang, Yu;Xia, Yong;
7:2:41:13     Co-O-O-Co superexchange pathways enhanced by small charge-transfer energy in multiferroic BiCoO3
DOI:10.1103/PhysRevB.83.235105  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Sudayama, T.;Wakisaka, Y.;Mizokawa, T.;Wadati, H.;Sawatzky, G. A.;Hawthorn, D. G.;Regier, T. Z.;Oka, K.;Azuma, M.;Shimakawa, Y.;
7:2:41:14     Pressure-driven changes in electronic structure of BiCoO3
DOI:10.1103/PhysRevB.83.104104  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Kanungo, Sudipta;Saha-Dasgupta, T.;
7:2:41:15     Effects of spin transition on diffusion of Fe2+ in ferropericlase in Earth's lower mantle
DOI:10.1103/PhysRevB.84.184102  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Saha, Saumitra;Bengtson, Amelia;Crispin, Katherine L.;Van Orman, James A.;Morgan, Dane;
7:2:41:16     Ab initio energetics of charge compensating point defects: A case study on MgO
DOI:10.1016/j.commatsci.2013.02.005  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2013
  TC:3  AU: Lin, Shih-kang;Yeh, Chao-kuei;Puchala, Brian;Lee, Yueh-Lin;Morgan, Dane;
7:2:42:1     Multiferroic properties and surface potential behaviors in cobalt-doped BiFeO3 film
DOI:10.1063/1.3391667  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Zhang, Q.;Kim, C. H.;Jang, Y. H.;Hwang, H. J.;Cho, J. H.;
7:2:42:2     Electric field and surface charge effects on ferroelectric domain dynamics in BaTiO3 single crystal
DOI:10.1103/PhysRevB.84.024101  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: He, D. Y.;Qiao, L. J.;Volinsky, Alex A.;Bai, Y.;Guo, L. Q.;
7:2:42:3     Effect of local surface potential distribution on its relaxation in polycrystalline ferroelectric films
DOI:10.1063/1.3290953  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Kim, Yunseok;Park, Moonkyu;Buehlmann, Simon;Hong, Seungbum;Kim, Yong Kwan;Ko, Hyoungsoo;Kim, Jiyoon;No, Kwangsoo;
7:2:42:4     Humidity effect on BaTiO3 c-domain surface potential inversion induced by electric field
DOI:10.1063/1.3636396  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: He, D. Y.;Qiao, L. J.;Volinsky, Alex A.;
7:2:42:5     Electric field and humidity effects on adsorbed water behavior on BaTiO3 ferroelectric domains studied by scanning probe microscopy
DOI:10.1063/1.4894006  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: He, D. Y.;Qiao, L. J.;Khodayari, Mehdi;Volinsky, Alex A.;
7:2:42:6     Humidity effects on (001) BaTiO3 single crystal surface water adsorption
DOI:10.1063/1.3544586  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:16  AU: He, D. Y.;Qiao, L. J.;Volinsky, Alex A.;Bai, Y.;Wu, M.;Chu, W. Y.;
7:2:42:7     Surface screening of written ferroelectric domains in ambient conditions
DOI:10.1063/1.4801983  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Segura, J. J.;Domingo, N.;Fraxedas, J.;Verdaguer, A.;
7:2:42:8     Temperature change effect on BaTiO3 single crystal surface around domain walls
DOI:10.1016/j.apsusc.2014.05.175  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: He, D. Y.;Xing, X. R.;Qiao, L. J.;Volinsky, Alex A.;
7:2:42:9     Stable bipolar surface potential behavior of copper-doped zinc oxide films studied by Kelvin probe force microscopy
DOI:10.1063/1.3521281  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Wong, Meng Fei;Herng, Tun Seng;Zhang, Zhongkun;Zeng, Kaiyang;Ding, Jun;
7:2:42:10     Orientation-dependent surface potential behavior in Nb-doped BiFeO3
DOI:10.1063/1.4705405  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Yan, F.;Xing, G. Z.;Islam, M.;Li, S.;Lu, L.;
7:2:42:11     Humidity effects on tip-induced polarization switching in lithium niobate
DOI:10.1063/1.4867979  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Ievlev, A. V.;Morozovska, A. N.;Shur, V. Ya.;Kalinin, S. V.;
7:2:42:12     The effect of humidity on nano-scaled domain switching in LiNbO3 single crystal
DOI:10.1063/1.3603020  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Sun, X.;Su, Y. J.;Gao, K. W.;Guo, L. Q.;Qiao, L. J.;Chu, W. Y.;
7:2:42:13     Enhancement of magnetization at morphotropic phase boundary in epitaxial BiCoO3-BiFeO3 solid solution films grown on SrTiO3 (100) substrates
DOI:10.1063/1.3561776  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Naganuma, Hiroshi;Yasui, Shintaro;Nishida, Ken;Iijima, Takashi;Funakubo, Hiroshi;Okamura, Soichiro;
7:2:42:14     Mg-doped Bi0.8Ca0.2FeO3 with enhanced ferromagnetic properties
DOI:10.1016/j.matlet.2014.01.127  JN:MATERIALS LETTERS  PY:2014
  TC:4  AU: Xu, Jianlong;Xie, Dan;Yin, Cong;Feng, Tingting;Zhang, Xiaowen;Zhao, Haiming;Li, Gang;Ren, Tian-Ling;Guan, Yujie;Gao, Xingsen;Pan, Wei;
7:2:42:15     Investigation of the ferroelectric properties and dynamics of nanodomains in LiNbO3 thin films grown on Si (100) substrate by scanning probe microscopy techniques
DOI:10.1016/j.tsf.2014.01.041  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Kiselev, D. A.;Zhukov, R. N.;Ksenich, S. V.;Kozlova, A. P.;Bykov, A. S.;Malinkovich, M. D.;Parkhomenko, Yu N.;
7:2:42:16     In-situ nanoscale mapping of surface potential in all-solid-state thin film Li-ion battery using Kelvin probe force microscopy
DOI:10.1063/1.3699214  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Zhu, Jing;Zeng, Kaiyang;Lu, Li;
7:2:42:17     Leakage current under high electric fields and magnetic properties in Co and Mn co-substituted BiFeO3 polycrystalline films
DOI:10.1016/j.tsf.2014.03.046  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Miura, Jun;Nakajima, Takashi;Naganuma, Hiroshi;Okamura, Soichiro;
7:2:42:18     Bipolar Charge Storage Characteristics in Copper and Cobalt Co-doped Zinc Oxide (ZnO) Thin Film
DOI:10.1021/am301220h  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:3  AU: Kumar, Amit;Herng, Tun Seng;Zeng, Kaiyang;Ding, Jun;
7:2:43:1     Synthesis and photocatalytic performance of the electrospun Bi2Fe4O9 nanofibers
DOI:10.1007/s10853-013-7227-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:9  AU: Qi, Shishun;Zuo, Ruzhong;Wang, Yu;Wong, Helen;Chan, Lai-Wa;
7:2:43:2     Polyacrylamide gel synthesis and photocatalytic performance of Bi2Fe4O9 nanoparticles
DOI:10.1016/j.jallcom.2010.09.097  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:25  AU: Zhang, M.;Yang, H.;Xian, T.;Wei, Z. Q.;Jiang, J. L.;Feng, Y. C.;Liu, X. Q.;
7:2:43:3     A facile approach to pure-phase Bi2Fe4O9 nanoparticles sensitive to visible light
DOI:10.1016/j.apsusc.2014.09.166  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:3  AU: Wang, X.;Zhang, M.;Tian, P.;Chin, W. S.;Zhang, C. M.;
7:2:43:4     Off-stoichiometry effects on BiFeO3 thin films
DOI:10.1016/j.ssi.2011.03.017  JN:SOLID STATE IONICS  PY:2011
  TC:23  AU: Lahmar, A.;Zhao, K.;Habouti, S.;Dietze, M.;Solterbeck, C. -H.;Es-Souni, M.;
7:2:43:5     Phonon and magnon scattering of antiferromagnetic Bi2Fe4O9
DOI:10.1103/PhysRevB.81.024302  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Iliev, M. N.;Litvinchuk, A. P.;Hadjiev, V. G.;Gospodinov, M. M.;Skumryev, V.;Ressouche, E.;
7:2:43:6     Exchange bias effect in Bi2Fe3AlO9 ceramics
DOI:10.1063/1.4902110  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Huang, S.;Shi, L. R.;Sun, H. G.;Zhu, C. M.;Tian, Z. M.;Yuan, S. L.;
7:2:43:7     Effect of antiferromagnetic order on the dielectric properties of Bi2Fe4O9
DOI:10.1063/1.3339880  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Park, Y. A.;Song, K. M.;Lee, K. D.;Won, C. J.;Hur, N.;
7:2:43:8     Effects of Ti-doping on the structural, electrical and multiferroic properties of Bi2Fe4O9 thin films
DOI:10.1016/j.ceramint.2014.06.003  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Raghavan, Chinnambedu Murugesan;Kim, Jin Won;Choi, Ji Ya;Kim, Jong-Woo;Kim, Sang Su;
7:2:43:9     Effects of Ho and Ti Doping on Structural and Electrical Properties of BiFeO3 Thin Films
DOI:10.1111/jace.12641  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Raghavan, Chinnambedu Murugesan;Kim, Jin Won;Kim, Sang Su;
7:2:43:10     Enhanced multiferroic properties in Ti-doped Bi2Fe4O9 ceramics
DOI:10.1063/1.3478705  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:16  AU: Tian, Z. M.;Qiu, Y.;Yuan, S. L.;Wu, M. S.;Huo, S. X.;Duan, H. N.;
7:2:43:11     Enhanced magnetic and ferroelectric properties in scandium doped nano Bi2Fe4O9
DOI:10.1016/j.matchemphys.2012.06.005  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:7  AU: Dutta, Dimple P.;Sudakar, C.;Mocherla, Pavana S. V.;Mandal, Balaji P.;Jayakumar, Onnatu D.;Tyagi, Avesh K.;
7:2:43:12     Synthesis and Photocatalytic Property of Preferred-oriented Bi2Fe4O9 Crystals by Using Different Organic Additives
DOI:10.1080/00150193.2013.842119  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Tong, Tong;Cai, Dengrong;Jin, Dengren;Cheng, Jinrong;
7:2:43:13     Enhanced photocatalytic activity in Al-substituted Bi2Fe4O9 submicrocrystals
DOI:10.1007/s10853-012-6600-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:9  AU: Liu, ZhangSheng;Wu, BianTao;Yin, DaGen;Zhu, YaBo;Wang, LianGuo;
7:2:43:14     Synthesis of Bi2Fe4O9 via PVA sol-gel route
DOI:10.1016/j.mseb.2011.01.009  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:15  AU: Liu, Ting;Xu, Yebin;Zeng, Chunlian;
7:2:43:15     Mixed valence of iron inside tetrahedral and pseudopyramids in BiFe2O5-delta
DOI:10.1103/PhysRevB.85.174406  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Retuerto, M.;Martinez-Lope, M. J.;Krezhov, K.;Ruskov, T.;Spirov, I.;Krystev, P.;Jimenez-Villacorta, F.;Fernandez-Diaz, M. T.;Alonso, J. A.;
7:2:43:16     Magnetic and dielectric properties of the PbFeBO4 single crystal
DOI:10.1016/j.jmmm.2013.10.018  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Pankrats, A.;Sablina, K.;Velikanov, D.;Vorotynov, A.;Bayukov, O.;Eremin, A.;Molokeev, M.;Popkov, S.;Krasikov, A.;
7:2:43:17     Optimizing phase and microstructure of chemical solution-deposited bismuth ferrite (BiFeO3) thin films to reduce DC leakage
DOI:10.1007/s10853-012-6914-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:4  AU: Casper, Michelle D.;Losego, Mark D.;Maria, Jon-Paul;
7:2:44:1     Evidence for local monoclinic structure, polarization rotation, and morphotropic phase transitions in (1-x)BiFeO3-xBaTiO(3) solid solutions: A high-energy synchrotron x-ray powder diffraction study
DOI:10.1103/PhysRevB.88.024113  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Singh, Anar;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;Pandey, Dhananjai;
7:2:44:2     Magnetic transitions and site-disordered induced weak ferromagnetism in (1-x)BiFeO3-xBaTiO(3)
DOI:10.1103/PhysRevB.89.024108  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Singh, Anar;Senyshyn, Anatoliy;Fuess, Hartmut;Kennedy, Shane J.;Pandey, Dhananjai;
7:2:44:3     Multiferroic and piezoelectric properties of 0.65BiFeO(3)-0.35BaTiO(3) ceramic with pseudo-cubic symmetry
DOI:10.1016/j.ceramint.2011.11.080  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:14  AU: Wei, Yongxing;Wang, Xiaotao;Jia, Jiangjiang;Wang, Xiaoli;
7:2:44:4     Composition-dependent magnetic properties of BiFeO3-BaTiO3 solid solution nanostructures
DOI:10.1103/PhysRevB.82.024431  JN:PHYSICAL REVIEW B  PY:2010
  TC:19  AU: Park, Tae-Jin;Papaefthymiou, Georgia C.;Viescas, Arthur J.;Lee, Yongjae;Zhou, Hongjun;Wong, Stanislaus S.;
7:2:44:5     Finite-temperature properties of (BiFeO3)(x)(BaTiO3)(1-x) solid solutions
DOI:10.1103/PhysRevB.90.140201  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Prokhorenko, Sergei;Nahas, Yousra;Kornev, Igor;
7:2:44:6     Ferroic states and phase coexistence in BiFeO3-BaTiO3 solid solutions
DOI:10.1063/1.4766450  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Gotardo, R. A. M.;Viana, D. S. F.;Olzon-Dionysio, M.;Souza, S. D.;Garcia, D.;Eiras, J. A.;Alves, M. F. S.;Cotica, L. F.;Santos, I. A.;Coelho, A. A.;
7:2:44:7     Enhanced Multiferroic and Magnetocapacitive Properties of ( 1-x) Ba0.7Ca0.3TiO3-xBiFeO3 Ceramics
DOI:10.1111/jace.12702  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Li, Cai-Xia;Yang, Bin;Zhang, Shan-Tao;Zhang, Rui;Sun, Ye;Zhang, Hong-Jun;Cao, Wen-Wu;
7:2:44:8     0.7BiFeO(3)-0.3BaTiO(3)-Y3Fe5O12 composites with simultaneously improved electrical and magnetic properties
DOI:10.1063/1.3677944  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Yang, Haibo;Ke, Qingqing;Si, Huayan;Chen, Jingsheng;
7:2:44:9     Neutron powder diffraction study of nuclear and magnetic structures of multiferroic (Bi0.8Ba0.2)(Fe0.8Ti0.2)O-3: Evidence for isostructural phase transition and magnetoelastic and magnetoelectric couplings
DOI:10.1103/PhysRevB.83.054406  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Singh, Anar;Senyshyn, Anatoliy;Fuess, Hartmut;Chatterji, Tapan;Pandey, Dhananjai;
7:2:44:10     Evidence for weak ferromagnetism, isostructural phase transition, and linear magnetoelectric coupling in the multiferroic Bi0.8Pb0.2Fe0.9Nb0.1O3 solid solution
DOI:10.1103/PhysRevB.88.104108  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Patel, Jay Prakash;Senyshyn, Anatoliy;Fuess, Hartmut;Pandey, Dhananjai;
7:2:44:11     Measurement and Estimation of Ferroelectric Hysteresis Loops
DOI:10.1080/00150193.2010.493086  JN:FERROELECTRICS  PY:2011
  TC:4  AU: Wang, Le;Wang, Xiaoli;Shi, Jing;
7:2:44:12     Structural Refinement and Ferroic Properties in BiFeO3-Based Compounds
DOI:10.1080/10584587.2011.616452  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Cotica, Luiz F.;Freitas, Valdirlei F.;Dias, G. S.;Gotardo, Ricardo A. M.;Santos, Ivair A.;Garcia, D.;Eiras, Jose A.;
7:2:44:13     Structural and Multiferroic Properties of 1-x(Bi0.85La0.15)FeO3-xPbTiO(3) Solid Solutions
DOI:10.1080/10584587.2013.772468  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:3  AU: Bu, Shundong;Wang, Dalei;Jin, Guoxi;Dai, R. Ui;Shi, Guiyang;Jin, Dengren;Cheng, Jinrong;
7:2:45:1     Nanostructured Ferroelectrics: Fabrication and Structure-Property Relations
DOI:10.1002/adma.201102249  JN:ADVANCED MATERIALS  PY:2011
  TC:30  AU: Han, Hee;Kim, Yunseok;Alexe, Marin;Hesse, Dietrich;Lee, Woo;
7:2:45:2     First-Order Reversal Curve Probing of Spatially Resolved Polarization Switching Dynamics in Ferroelectric Nanocapacitors
DOI:10.1021/nn203831h  JN:ACS NANO  PY:2012
  TC:11  AU: Kim, Yunseok;Kumar, Amit;Ovchinnikov, Oleg;Jesse, Stephen;Han, Hee;Pantel, Daniel;Vrejoiu, Ionela;Lee, Woo;Hesse, Dietrich;Alexe, Marin;Kalinin, Sergei V.;
7:2:45:3     Individual switching of film-based nanoscale epitaxial ferroelectric capacitors
DOI:10.1063/1.3474960  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Kim, Yunseok;Han, Hee;Rodriguez, Brian J.;Vrejoiu, Ionela;Lee, Woo;Baik, Sunggi;Hesse, Dietrich;Alexe, Mann;
7:2:45:4     Reversible plasma switching in epitaxial BiFeO3 thin films
DOI:10.1063/1.3431585  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Kim, Yunseok;Vrejoiu, Ionela;Hesse, Dietrich;Alexe, Marin;
7:2:45:5     Anisotropy of domain growth in epitaxial ferroelectric capacitors
DOI:10.1063/1.3366724  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Wu, D.;Vrejoiu, I.;Alexe, M.;Gruverman, A.;
7:2:45:6     Role of measurement voltage on hysteresis loop shape in Piezoresponse Force Microscopy
DOI:10.1063/1.4764939  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Strelcov, E.;Kim, Y.;Yang, J. C.;Chu, Y. H.;Yu, P.;Lu, X.;Jesse, S.;Kalinin, S. V.;
7:2:45:7     Towards the limit of ferroelectric nanostructures: switchable sub-10 nm nanoisland arrays
DOI:10.1039/c3tc30971a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:3  AU: Kim, Youngsuk;Kim, Yunseok;Han, Hee;Jesse, Stephen;Hyun, Seung;Lee, Woo;Kalinin, Sergei V.;Kim, Jin Kon;
7:2:45:8     Piezoresponse force microscopy observation of domain switching in Bi3.15Nd0.85Ti3O12 thin film prepared by pulsed laser deposition
DOI:10.1063/1.3626829  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Huang, H.;Zhong, X. L.;Xie, S. H.;Zhang, Y.;Wang, J. B.;Zhou, Y. C.;
7:2:45:9     Cross talk by extensive domain wall motion in arrays of ferroelectric nanocapacitors
DOI:10.1063/1.3661166  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Kim, Yunseok;Han, Hee;Vrejoiu, Ionela;Lee, Woo;Hesse, Dietrich;Alexe, Marin;
7:2:45:10     Recent Advances in Functional Testing of Ferroelectric Nanostructures
DOI:10.1080/00150193.2012.678145  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Gruverman, A.;
7:2:45:11     Polarization Reversal in BiFeO3 Capacitors: Complex Behavior Revealed by PFM
DOI:10.1080/00150193.2011.594326  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Iwanowska, Monika;Stolichnov, Igor;Colla, Enrico;Tagantsev, Alexander;Muralt, Paul;Setter, Nava;
7:2:45:12     Domain structures and piezoelectric properties of Pb(Zr(0.2)Ti(0.8))O(3) nanocapacitors
DOI:10.1063/1.3475476  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Han, Hee;Park, Yong Jun;Baik, Sunggi;Lee, Woo;Alexe, Marin;Hesse, Dietrich;Goesele, Ulrich;
7:2:46:1     Influence of transition elements doping on structural, optical and magnetic properties of BiFeO3 films fabricated by magnetron sputtering
DOI:10.1016/j.matlet.2013.08.075  JN:MATERIALS LETTERS  PY:2013
  TC:14  AU: Yan, Hurui;Deng, Hongmei;Ding, Nuofan;He, Jun;Peng, Lin;Sun, Lin;Yang, Pingxiong;Chu, Junhao;
7:2:46:2     Structure, optical and magnetic properties of Bi1-xEuxFeO3 films fabricated by pulsed laser deposition
DOI:10.1016/j.apsusc.2014.07.179  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Liu, Jian;Deng, Hongmei;Zhu, Liping;Zhang, Kezhi;Meng, Xiankuan;Cao, Huiyi;Yang, Pingxiong;Chu, Junhao;
7:2:46:3     Influence of Co doping on structural, optical and magnetic properties of BiFeO3 films deposited on quartz substrates by sol-gel method
DOI:10.1016/j.apsusc.2012.11.176  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:19  AU: Peng, Lin;Deng, Hongmei;Tian, Jianjun;Ren, Qing;Peng, Cheng;Huang, Zhipeng;Yang, Pingxiong;Chu, Junhao;
7:2:46:4     Optical properties of BiFeO3-(Na0.5Bi0.5)TiO3 thin films deposited on glass substrates by chemical solution deposition
DOI:10.1016/j.matlet.2011.12.042  JN:MATERIALS LETTERS  PY:2012
  TC:8  AU: Guo, Bing;Guo, Yiping;Qin, Wei;Liu, Hongyan;Zhang, Di;
7:2:46:5     Influence of rare-earth elements doping on structure and optical properties of BiFe03 thin films fabricated by pulsed laser deposition
DOI:10.1016/j.apsusc.2014.04.071  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:5  AU: Liu, Jian;Deng, Hongmei;Cao, Huiyi;Zhai, Xuezhen;Tao, Jiahua;Sun, Lin;Yang, Pingxiong;Chu, Junhao;
7:2:46:6     Structure and optical properties of BiFe1-xZnxO3 thin films fabricated by pulsed laser deposition
DOI:10.1016/j.matlet.2012.05.025  JN:MATERIALS LETTERS  PY:2012
  TC:21  AU: Ding, Nuofan;Deng, Hongmei;Yang, Pingxiong;Chu, Junhao;
7:2:46:7     Influence of Zn doping on structural, optical and magnetic properties of BiFeO3 films fabricated by the sol-gel technique
DOI:10.1016/j.matlet.2014.06.142  JN:MATERIALS LETTERS  PY:2014
  TC:3  AU: Liu, Jian;Deng, Hongmei;Zhai, Xuezhen;Lin, Tie;Meng, Xiangjian;Zhang, Yuanyuan;Zhou, Wenliang;Yang, Pingxiong;Chu, Junhao;
7:2:46:8     Optical and electrical properties of multiferroic bismuth ferrite thin films fabricated by sol-gel technique
DOI:10.1016/j.matlet.2010.07.020  JN:MATERIALS LETTERS  PY:2010
  TC:25  AU: Huang, Dongji;Deng, Hongmei;Yang, Pingxiong;Chu, Junhao;
7:2:46:9     Microwave hydrothermal synthesis of BiFeO3: Impact of different surfactants on the morphology and photocatalytic properties
DOI:10.1016/j.mssp.2013.08.012  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:0  AU: Huang, Jing;Tan, Guoqiang;Yang, Wei;Zhang, Lili;Ren, Huijun;Xia, Ao;
7:2:46:10     A study of the optical properties of Bi0.7Ba0.15La0.15FeO3 thin film
DOI:10.1016/j.tsf.2011.01.345  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Luo, B. C.;Chen, C. L.;Jin, K. X.;Zhou, C. C.;
7:2:46:11     Optical Properties of 0.95BiFeO3-RTiO3 (R = Mg, Pb, Ba, Ca and Sr) Thin Films
DOI:10.1080/10584587.2012.735853  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Wu, Jiagang;Qiao, Sha;Wang, John;Wu, Huaping;Zhu, Jianguo;Xiao, Dingquan;
7:2:46:12     Preparation of BiVO4/bentonite catalysts and their photocatalytic properties under simulated solar irradiation
DOI:10.1016/j.mssp.2012.06.010  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2013
  TC:8  AU: Qu, J. G.;Li, N. N.;Liu, B. J.;He, J. X.;
7:2:47:1     The magnetic structure of an epitaxial BiMn0.5Fe0.5O3 thin film on SrTiO3 (001) studied with neutron diffraction
DOI:10.1063/1.4762818  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Cortie, D. L.;Stampfl, A. P. J.;Klose, F.;Du, Y.;Wang, X. L.;Zhao, H. Y.;Kimura, H.;Cheng, Z. X.;
7:2:47:2     Multiferroism in orientational engineered (La, Mn) co-substituted BiFeO3 thin films
DOI:10.1063/1.3594745  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:17  AU: Wang, D. Y.;Chan, N. Y.;Zheng, R. K.;Kong, C.;Lin, D. M.;Dai, J. Y.;Chan, H. L. W.;Li, S.;
7:2:47:3     Room Temperature Ferrimagnetism and Ferroelectricity in Strained, Thin Films of BiFe0.5Mn0.5O3
DOI:10.1002/adfm.201401464  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:0  AU: Choi, Eun-Mi;Fix, Thomas;Kursumovic, Ahmed;Kinane, Christy J.;Arena, Dario;Sahonta, Suman-Lata;Bi, Zhenxing;Xiong, Jie;Yan, Li;Lee, Jun-Sik;Wang, Haiyan;Langridge, Sean;Kim, Young-Min;Borisevich, Albina Y.;MacLaren, Ian;Ramasse, Quentin M.;Blamire, Mark G.;Jia, Quanxi;MacManus-Driscoll, Judith L.;
7:2:47:4     Magnetic properties of Bi2FeMnO6: A multiferroic material with double-perovskite structure
DOI:10.1063/1.3490221  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Du, Y.;Cheng, Z. X.;Dou, S. X.;Wang, X. L.;Zhao, H. Y.;Kimura, H.;
7:2:47:5     Strong room temperature magnetism in highly resistive strained thin films of BiFe0.5Mn0.5O3
DOI:10.1063/1.3540683  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Choi, E. -M.;Patnaik, S.;Weal, E.;Sahonta, S. -L.;Wang, H.;Bi, Z.;Xiong, J.;Blamire, M. G.;Jia, Q. X.;MacManus-Driscoll, J. L.;
7:2:47:6     Multiferroic BiFeO3-BiMnO3 nanoscale checkerboard from first principles
DOI:10.1103/PhysRevB.82.075432  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Palova, L.;Chandra, P.;Rabe, K. M.;
7:2:47:7     Bi-relaxation behaviors in epitaxial multiferroic double-perovskite BiFe0.5Mn0.5O3/CaRuO3 heterostructures
DOI:10.1063/1.3624847  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Miao, J.;Zhang, X.;Zhan, Q.;Jiang, Y.;Chew, K. -H.;
7:2:47:8     Ferroelectric and ferromagnetic properties of epitaxial BiFeO3-BiMnO3 films on ion-beam-assisted deposited TiN buffered flexible Hastelloy
DOI:10.1063/1.4869438  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Xiong, J.;Matias, V.;Tao, B. W.;Li, Y. R.;Jia, Q. X.;
7:2:47:9     Anisotropy of crystal growth mechanisms, dielectricity, and magnetism of multiferroic Bi2FeMnO6 thin films
DOI:10.1063/1.4794724  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Liu, P.;Cheng, Z. X.;Du, Y.;Feng, L. Y.;Fang, H.;Wang, X. L.;Dou, S. X.;
7:2:47:10     Magnetostructural Effect in the Multiferroic BiFeO3-BiMnO3 Checkerboard from First Principles
DOI:10.1103/PhysRevLett.104.037202  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:6  AU: Palova, L.;Chandra, P.;Rabe, K. M.;
7:2:47:11     Room temperature multiferroic heterostructure: Nd: BiFeO3/YMnO3
DOI:10.1016/j.jcrysgro.2012.12.023  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:0  AU: Zhao, Hongyang;Kimura, Hideo;Cheng, Zhenxiang;Wang, Xiaolin;Yao, Qiwen;Osada, Minoru;Li, Baowen;
7:2:47:12     Improved multiferroic behavior in [111]-oriented BiFeO3/BiAlO3 superlattice
DOI:10.1063/1.4795847  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Ding, Hang-Chen;Li, Ya-Wei;Zhu, Wanjiao;Gao, Yong-Chao;Gong, Shi-Jing;Duan, Chun-Gang;
7:2:47:13     Strong room temperature magnetism in highly resistive strained thin films of BiFe0.5Mn0.5O3 (vol 98, 012509, 2011)
DOI:10.1063/1.3565432  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Choi, E-M;Patnaik, S.;Weal, E.;Sahonta, S-L;Mecklenburg, G.;Wang, H.;Bi, Z.;Xiong, J.;Blamire, M. G.;Jia, Q. X.;MacManus-Driscoll, J. L.;
7:2:47:14     Magnetic properties of La doped Bi2FeMnO6 ceramic and film
DOI:10.1063/1.3503397  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Zhao, Hongyang;Kimura, Hideo;Cheng, Zhenxiang;Wang, Xiaolin;Ozawa, Kiyoshi;Nishida, Takashi;
7:2:47:15     Ab-initio study of competing magnetic configurations in cubic BiFeO3 alloys
DOI:10.1016/j.jmmm.2011.04.016  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:0  AU: Koumpouras, Konstantinos;Galanakis, Iosif;
7:2:48:1     Electrical reliability and leakage mechanisms in highly resistive multiferroic La0.1Bi0.9FeO3 ceramics
DOI:10.1063/1.3580604  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:20  AU: Wang, S. Y.;Qiu, Xue;Gao, J.;Feng, Yu;Su, W. N.;Zheng, J. X.;Yu, D. S.;Li, D. J.;
7:2:48:2     Magnetoelectric coupling and phase transition in BiFeO3 and (BiFeO3)(0.95)(BaTiO3)(0.05) ceramics
DOI:10.1063/1.3551578  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:26  AU: Wang, T. -H.;Tu, C. -S.;Chen, H. -Y.;Ding, Y.;Lin, T. C.;Yao, Y. -D.;Schmidt, V. H.;Wu, K. -T.;
7:2:48:3     A simple method of synthesizing homogeneous La0.1Bi0.9FeO3-BiY2Fe5O12 composite powders
DOI:10.1016/j.ceramint.2013.09.108  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Liu, Miao;Yang, Haibo;Lin, Ying;Yang, Yanyan;
7:2:48:4     Impedance spectroscopy analysis of 0.7BiFeO(3)-0.3BaTiO(3)/BiY2Fe5O12 composites with simultaneously improved magnetization and remnant polarization
DOI:10.1016/j.matchemphys.2012.07.007  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:9  AU: Lin, Ying;Yang, Haibo;Zhu, Zhenfeng;
7:2:48:5     Dielectric response and origin in antiferromagnetic/ferroelectric (1=x)BiFeO3-(x)BaTiO3 ceramics
DOI:10.1063/1.4795420  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Tu, C. -S.;Chien, R. R.;Wang, T. -H.;Anthoninappen, J.;Peng, Y. -T.;
7:2:48:6     La0.1Bi0.9FeO3-BiY2Fe5O12 composites with simultaneously improved magnetization and polarization
DOI:10.1016/j.ceramint.2012.10.257  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Lin, Ying;Yang, Haibo;Zhu, Zhenfeng;Wang, Fen;
7:2:48:7     Ferroelectric, Ferromagnetic, and Magnetoelectric Characteristics of 0.9(0.7BiFeO(3)-0.3BaTiO(3))-0.1CoFe(2)O(4) Ceramic Composite
DOI:10.1111/j.1551-2916.2010.03943.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Liu, Xiao-hui;Xu, Zhuo;Wei, Xiao-yong;Dai, Zhong-hua;Yao, Xi;
7:2:48:8     Electrical properties of BiFeO3-BaTiO3 ceramics fabricated by mechanochemical synthesis and spark plasma sintering
DOI:10.1016/j.matlet.2012.08.015  JN:MATERIALS LETTERS  PY:2012
  TC:4  AU: Dai, Zhonghua;Akishige, Yukikuni;
7:2:48:9     Origins of dielectric response and conductivity in (Bi1-xNdx)FeO3 multiferroic ceramics
DOI:10.1063/1.3667204  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Tu, C-S.;Yang, W-C;Schmidt, V. H.;Chien, R. R.;
7:2:48:10     xBaTiO(3)-(1-x)BiFeO3 strained epitaxial thin film with enhanced magnetization
DOI:10.1016/j.matlet.2012.11.009  JN:MATERIALS LETTERS  PY:2013
  TC:4  AU: Yang, Haibo;Lin, Ying;Liu, Miao;Zhu, Jianfeng;Wang, Fen;
7:2:48:11     BiFeO3 ceramics synthesized by spark plasma sintering
DOI:10.1016/j.ceramint.2011.05.020  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Dai, Zhong-Hua;Akishige, Yukikuni;
7:2:48:12     Structural and Dielectric Properties of (Bi1-xBax)(Fe1-xTix)O-3 Multiferroic Ceramics
DOI:10.1080/00150193.2014.922822  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Wang, T. -H.;Tu, C. -S.;Schmidt, V. H.;Chien, R. R.;Ding, Y.;
7:2:48:13     Dielectric properties and heating effect of multiferroic BiFeO3 suspension
DOI:10.1016/j.matlet.2011.04.029  JN:MATERIALS LETTERS  PY:2011
  TC:6  AU: Dai, Zhonghua;Fujita, Yasuhisa;Akishige, Yukikuni;
7:2:48:14     Magnetoelectric coupling-induced anisotropy in multiferroic nanocomposite (1-x)BiFeO3-xBaTiO(3)
DOI:10.1007/s11051-013-2004-8  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:3  AU: Gupta, Rekha;Shah, Jyoti;Chaudhary, Sujeet;Singh, Sukhbeer;Kotnala, Ravinder K.;
7:2:49:1     Phase-field simulation of magnetoelastic couplings in ferromagnetic shape memory alloys
DOI:10.1016/j.actamat.2011.01.001  JN:ACTA MATERIALIA  PY:2011
  TC:21  AU: Li, L. J.;Lei, C. H.;Shu, Y. C.;Li, J. Y.;
7:2:49:2     Influence of strain on space-charge distribution at ferroelectric thin-film free surfaces
DOI:10.1016/j.actamat.2012.07.050  JN:ACTA MATERIALIA  PY:2012
  TC:4  AU: Yang, Lun;Dayal, Kaushik;
7:2:49:3     The role of phase compatibility in martensite
DOI:10.1063/1.4712629  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Salman, Oguz Umut;Finel, Alphonse;Delville, Remi;Schryvers, Dominique;
7:2:49:4     Free surface domain nucleation in a ferroelectric under an electrically charged tip
DOI:10.1063/1.3674320  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Yang, Lun;Dayal, Kaushik;
7:2:49:5     Space charges and size effects in semiconducting ferroelectric BaTiO3/SrTiO3 superlattices
DOI:10.1063/1.3473821  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Liu, Y. Y.;Li, J. Y.;
7:2:49:6     Phase-field modeling of the coupled microstructure and fracture evolution in ferroelectric single crystals
DOI:10.1016/j.actamat.2011.03.030  JN:ACTA MATERIALIA  PY:2011
  TC:24  AU: Abdollahi, Amir;Arias, Irene;
7:2:49:7     Formulation of phase-field energies for microstructure in complex crystal structures
DOI:10.1063/1.3319503  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Yang, Lun;Dayal, Kaushik;
7:2:49:8     Phase-field modeling of martensitic microstructure with inhomogeneous elasticity
DOI:10.1063/1.4796098  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Chen, H. Z.;Shu, Y. C.;
7:2:49:9     Effect of lattice orientation, surface modulation, and applied fields on free-surface domain microstructure in ferroelectrics
DOI:10.1016/j.actamat.2011.07.014  JN:ACTA MATERIALIA  PY:2011
  TC:9  AU: Yang, Lun;Dayal, Kaushik;
7:2:49:10     Austenite-martensite interface in shape memory alloys
DOI:10.1063/1.3385278  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Lei, C. H.;Li, L. J.;Shu, Y. C.;Li, J. Y.;
7:2:49:11     Evolution of polarization and space charges in semiconducting ferroelectrics
DOI:10.1063/1.3678598  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Suryanarayana, Phanish;Bhattacharya, Kaushik;
7:2:49:12     Domain patterns in free-standing nanoferroelectrics
DOI:10.1016/j.actamat.2012.02.053  JN:ACTA MATERIALIA  PY:2012
  TC:5  AU: Ng, Nathaniel;Ahluwalia, Rajeev;Srolovitz, David J.;
7:2:49:13     Properties of Clean Surface of BaTiO3 Single Crystals in UHV and Virtual Absence of Nonferroelectric Surface Layer
DOI:10.1080/00150193.2011.594413  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Watanabe, Yukio;
7:2:49:14     Failure and toughness of bio-inspired composites: Insights from phase field modelling
DOI:10.1016/j.commatsci.2014.07.001  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: Khaderi, S. N.;Murali, P.;Ahluwalia, R.;
7:2:49:15     Dielectric Enhancement Effect in (Ba0.7Sr0.3TiO3/Ba0.5Sr0.5TiO3)(n) (n=1,2,3,4) Multilayered Thin Films Deposited by Chemical Solution Deposition Method
DOI:10.1080/10584587.2012.685412  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Fu, Yankun;Chang, Qing;Liu, Qiangchun;Dai, Jianming;Wu, Dajun;Zhu, Xuebin;Zhang, Weijie;Sun, Yuping;
7:2:49:16     Competition between surface trapping and nonradiative energy transfer to gold nanofilm
DOI:10.1063/1.3503518  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Yang, Zhenling;Liu, Yuqiang;He, Xing;Wen, Yanan;Yang, Yanqiang;
7:2:50:1     Three-dimensional ferroelectric domain imaging of epitaxial BiFeO3 thin films using angle-resolved piezoresponse force microscopy
DOI:10.1063/1.3487933  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Park, Moonkyu;Hong, Seungbum;Klug, Jeffrey A.;Bedzyk, Michael J.;Auciello, Orlando;No, Kwangsoo;Petford-Long, Amanda;
7:2:50:2     Effects of cantilever buckling on vector piezoresponse force microscopy imaging of ferroelectric domains in BiFeO3 nanostructures
DOI:10.1063/1.3327831  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Nath, Ramesh;Hong, Seungbum;Klug, Jeffrey A.;Imre, Alexandra;Bedzyk, Michael J.;Katiyar, Ram S.;Auciello, Orlando;
7:2:50:3     Mapping and statistics of ferroelectric domain boundary angles and types
DOI:10.1063/1.3643155  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Desmarais, Joseph;Ihlefeld, Jon F.;Heeg, Tassilo;Schubert, Juergen;Schlom, Darrell G.;Huey, Bryan D.;
7:2:50:4     High-Resolution Field Effect Sensing of Ferroelectric Charges
DOI:10.1021/nl103372a  JN:NANO LETTERS  PY:2011
  TC:10  AU: Ko, Hyoungsoo;Ryu, Kyunghee;Park, Hongsik;Park, Chulmin;Jeon, Daeyoung;Kim, Yong Kwan;Jung, Juhwan;Min, Dong-Ki;Kim, Yunseok;Lee, Ho Nyung;Park, Yoondong;Shin, Hyunjung;Hong, Seungbum;
7:2:50:5     Visualization and manipulation of meta-stable polarization variants in multiferroic materials
DOI:10.1063/1.4802249  JN:AIP ADVANCES  PY:2013
  TC:5  AU: Park, Moonkyu;No, Kwangsoo;Hong, Seungbum;
7:2:50:6     Nanoscale ferroelectric switching behavior at charged domain boundaries studied by angle-resolved piezoresponse force microscopy
DOI:10.1063/1.3646761  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Park, Moonkyu;Hong, Seungbum;Kim, Jiyoon;Hong, Jongin;No, Kwangsoo;
7:2:50:7     Identifying ferroelectric phase and domain structure using angle-resolved piezoresponse force microscopy
DOI:10.1063/1.4869554  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Kim, K. L.;Huber, J. E.;
7:2:50:8     Measurement of the polarization vector in BiMnO3 multiferroic thin films using surface and embedded microelectrodes
DOI:10.1063/1.4819450  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Mickel, Patrick R.;Buvaev, Sanal;Kamalov, Andrei;Jeen, Hyoungjeen;Finnegan, Patrick;Biswas, Amlan;Hebard, Arthur F.;James, Conrad D.;
7:2:50:9     Modeling and experimental verification of proof mass effects on vibration energy harvester performance
DOI:10.1088/0964-1726/19/4/045023  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:53  AU: Kim, Miso;Hoegen, Mathias;Dugundji, John;Wardle, Brian L.;
7:2:50:10     Growth and characterization of multiferroic BiMnO(3) thin films
DOI:10.1063/1.3561860  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:21  AU: Jeen, Hyoungjeen;Singh-Bhalla, Guneeta;Mickel, Patrick R.;Voigt, Kristen;Morien, Chelsey;Tongay, Sefaattin;Hebard, A. F.;Biswas, Amlan;
7:2:50:11     Elastic relaxation and correlation of local strain gradients with ferroelectric domains in (001) BiFeO3 nanostructures
DOI:10.1063/1.3605594  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Klug, Jeffrey A.;Holt, Martin V.;Premnath, Ramesh Nath;Joshi-Imre, Alexandra;Hong, Seungbum;Katiyar, Ram S.;Bedzyk, Michael J.;Auciello, Orlando;
7:2:50:12     Direct observation of fatigue in epitaxially grown Pb(Zr,Ti)O-3 thin films using second harmonic piezoresponse force microscopy
DOI:10.1063/1.3619839  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Murari, Nishit M.;Hong, Seungbum;Lee, Ho Nyung;Katiyar, Ram. S.;
7:2:50:13     Orientational strain modulation of ferroelectric polarization in multiferroic BiMnO3
DOI:10.1063/1.4903480  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Mickel, Patrick R.;Jeen, Hyoungjeen;Biswas, Amlan;Hebard, Arthur F.;
7:2:50:14     Elastic and Electric Damping Effects on Piezoelectric Cantilever Energy Harvesting
DOI:10.1080/00150193.2013.837735  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Huang, Hualin;Zheng, Chengjunyi;Ruan, Xuezheng;Zeng, Jiangtao;Zheng, Liaoying;Chen, Wenyuan;Li, Guorong;
7:2:50:15     Modeling and experimental verification of proof mass effects on vibration energy harvester performance (vol 19, 045023, 2010)
DOI:10.1088/0964-1726/19/6/069801  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:1  AU: Kim, Miso;Hoegen, Mathias;Dugundji, John;Wardle, Brian L.;
7:2:51:1     Cation ordering in perovskites
DOI:10.1039/b926757c  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:110  AU: King, Graham;Woodward, Patrick M.;
7:2:51:2     Frustrated Octahedral Tilting Distortion in the Incommensurately Modulated Li3xNd2/3-xTiO3 Perovskites
DOI:10.1021/cm4012052  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:6  AU: Abakumov, Artem M.;Erni, Rolf;Tsirlin, Alexander A.;Rossell, Marta D.;Batuk, Dmitry;Nenert, Gwilherm;Van Tendeloo, Gustaaf;
7:2:51:3     Antiferroelectric (Pb,Bi)(1-x)Fe1+xO3-y Perovskites Modulated by Crystallographic Shear Planes
DOI:10.1021/cm102907h  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:20  AU: Abakumov, Artem M.;Batuk, Dmitry;Hadermann, Joke;Rozova, Marina G.;Sheptyakov, Denis V.;Tsirlin, Alexander A.;Niermann, Daniel;Waschkowski, Florian;Hemberger, Joachim;Van Tendeloo, Gustaaf;Antipov, Evgeny V.;
7:2:51:4     Chessboard/Diamond Nanostructures and the A-site Deficient, Li1/2-3x Nd1/2+xTiO3, Defect Perovskite Solid Solution
DOI:10.1021/cm303239d  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:6  AU: Withers, Ray L.;Bourgeois, Laure;Snashall, Amanda;Liu, Yun;Noren, Lasse;Dwyer, Christian;Etheridge, Joanne;
7:2:51:5     Spontaneous Superlattice Formation in the Doubly Ordered Perovskite KLaMnWO6
DOI:10.1021/cm102592p  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:17  AU: Garcia-Martin, Susana;King, Graham;Urones-Garrote, Esteban;Nenert, Gwilherm;Woodward, Patrick M.;
7:2:51:6     Nanoscale phase separation in perovskites revisited
DOI:10.1038/nmat3865  JN:NATURE MATERIALS  PY:2014
  TC:3  AU: Erni, Rolf;Abakumov, Artem M.;Rossell, Marta D.;Batuk, Dmitry;Tsirlin, Alexander A.;Nenert, Gwilherm;Van Tendeloo, Gustaaf;
7:2:51:7     Nanoscale phase separation in perovskites revisited Reply
DOI:10.1038/nmat3866  JN:NATURE MATERIALS  PY:2014
  TC:2  AU: Davies, Peter K.;Guiton, Beth S.;
7:2:51:8     New Perovskite-Related Structure Family of Oxide-Ion Conducting Materials NdBalnO(4)
DOI:10.1021/cm500776x  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:7  AU: Fujii, Kotaro;Esaki, Yuichi;Omoto, Kazuki;Yashima, Masatomo;Hoshikawa, Akinori;Ishigaki, Toru;Hester, James R.;
7:2:51:9     Structural, magnetic and electrical properties of double-doped manganites Y0.5+ySr0.5-yMn1-yCryO3 (0 <= y <= 0.5)
DOI:10.1016/j.jmmm.2013.04.011  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Yang, Lei;Duanmu, Qingyong;Hao, Lin;Wang, Xiaoping;Wei, Yiyong;Zhang, Zhongfeng;Zhu, Hong;
7:2:51:10     Structure and magnetic properties of a new anion-deficient perovskite Pb2Ba2BiFe4ScO13 with crystallographic shear structure
DOI:10.1016/j.materresbull.2013.05.028  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:2  AU: Batuk, Maria;Tyablikov, Oleg A.;Tsirlin, Alexander A.;Kazakov, Sergey M.;Rozova, Marina G.;Pokholok, Konstantin V.;Filimonov, Dmitry S.;Antipov, Evgeny V.;Abakumov, Artem M.;Hadermann, Joke;
7:2:51:11     Structural Determination and Imaging of Charge Ordering and Oxygen Vacancies of the Multifunctional Oxides REBaMn 2 O 6-X( RE = Gd, Tb)
DOI:10.1002/adfm.201303564  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:3  AU: Avila-Brande, David;King, Graham;Urones-Garrote, Esteban;Subakti;Llobet, Anna;Garcia-Martin, Susana;
7:2:51:12     Nanocheckerboard modulations in (NaNd)(MgW)O-6
DOI:10.1063/1.3490637  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Licurse, Mark W.;Davies, Peter K.;
7:2:51:13     Incommensurate Crystallographic Shear Structures and Magnetic Properties of the Cation Deficient Perovskite (Sr0.61Pb0.18)(Fe0.75Mn0.25)O2.29
DOI:10.1021/cm903288s  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:5  AU: Malo, S.;Lepoittevin, C.;Perez, O.;Hebert, S.;Van Tendeloo, G.;Hervieu, M.;
7:2:51:14     Na1.5Ag1.5MO3F3 (M = Mo, W): An Ordered Oxyfluoride Derivative of the LiNbO3 Structure
DOI:10.1021/ja208587e  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:12  AU: Fry, Allyson M.;Seibel, Harry A., II;Lokuhewa, Indunil N.;Woodward, Patrick M.;
7:2:51:15     Synthesis and structure determination of ferromagnetic semiconductors LaAMnSnO(6) (A = Sr, Ba)
DOI:10.1039/c0jm02614j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:2  AU: Yang, Tao;Perkisas, Tyche;Hadermann, Joke;Croft, Mark;Ignatov, Alexander;Van Tendeloo, Gustaaf;Greenblatt, Martha;
7:2:51:16     Synthesis and characterisation of the novel double perovskites La2CrB2/3Nb1/3O6, B = Mg, Ni, Cu
DOI:10.1016/j.materresbull.2012.05.019  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:1  AU: Svensson, G.;Grins, J.;Shafeie, S.;Masson, D.;Norberg, S. T.;Eriksson, S.;Hull, S.;Zakharov, K. V.;Volkova, O. S.;Vasil'ev, A. N.;Istomin, S. Ya.;
7:2:52:1     Superspin Glass Mediated Giant Spontaneous Exchange Bias in a Nanocomposite of BiFeO3-Bi2Fe4O9
DOI:10.1103/PhysRevLett.110.107201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:18  AU: Maity, Tuhin;Goswami, Sudipta;Bhattacharya, Dipten;Roy, Saibal;
7:2:52:2     Multiferroic coupling in nanoscale BiFeO3
DOI:10.1063/1.3625924  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:20  AU: Goswami, Sudipta;Bhattacharya, Dipten;Choudhury, P.;Ouladdiaf, B.;Chatterji, T.;
7:2:52:3     Particle size dependence of magnetization and noncentrosymmetry in nanoscale BiFeO3
DOI:10.1063/1.3567038  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Goswami, Sudipta;Bhattacharya, Dipten;Choudhury, P.;
7:2:52:4     Do Dielectric Nanostructures Turn Metallic in High-Electric dc Fields?
DOI:10.1021/n1502715s  JN:NANO LETTERS  PY:2014
  TC:5  AU: Silaeva, E. P.;Arnoldi, L.;Karahka, M. L.;Deconihout, B.;Menand, A.;Kreuzer, H. J.;Vella, A.;
7:2:52:5     Large magnetoelectric coupling in nanoscale BiFeO3 from direct electrical measurements
DOI:10.1103/PhysRevB.90.104402  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Goswami, Sudipta;Bhattacharya, Dipten;Keeney, Lynette;Maity, Tuhin;Kaushik, S. D.;Siruguri, V.;Das, Gopes C.;Yang, Haifang;Li, Wuxia;Gu, Chang-zhi;Pemble, M. E.;Roy, Saibal;
7:2:52:6     Effect of particle size on ferroelectric and magnetic properties of BiFeO3 nanopowders
DOI:10.1088/0957-4484/24/35/355701  JN:NANOTECHNOLOGY  PY:2013
  TC:8  AU: Castillo, M. Escobar;Shvartsman, V. V.;Gobeljic, D.;Gao, Y.;Landers, J.;Wende, H.;Lupascu, D. C.;
7:2:52:7     Origin of the asymmetric exchange bias in BiFeO3/Bi2Fe4O9 nanocomposite
DOI:10.1103/PhysRevB.89.140411  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Maity, Tuhin;Goswami, Sudipta;Bhattacharya, Dipten;Roy, Saibal;
7:2:52:8     Spontaneous exchange bias in a nanocomposite of BiFeO3-Bi2Fe4O9
DOI:10.1063/1.4796149  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Maity, Tuhin;Goswami, Sudipta;Bhattacharya, Dipten;Das, Gopes C.;Roy, Saibal;
7:2:52:9     High K Nanophase Zinc Oxide on Biomimetic Silicon Nanotip Array as Supercapacitors
DOI:10.1021/nl304303p  JN:NANO LETTERS  PY:2013
  TC:4  AU: Han, Hsieh-Cheng;Chong, Cheong-Wei;Wang, Sheng-Bo;Heh, Dawei;Tseng, Chi-Ang;Huang, Yi-Fan;Chattopadhyay, Surojit;Chen, Kuei-Hsien;Lin, Chi-Feng;Lee, Jiun-Haw;Chen, Li-Chyong;
7:2:52:10     A training effect on electrical properties in nanoscale BiFeO3
DOI:10.1088/0957-4484/24/13/135705  JN:NANOTECHNOLOGY  PY:2013
  TC:1  AU: Goswami, Sudipta;Bhattacharya, Dipten;Li, Wuxia;Cui, Ajuan;Jiang, QianQing;Gu, Chang-zhi;
7:2:52:11     Magnetoelectric coupling of spray pyrolysis deposited multiferroic BiFeO3 films
DOI:10.1016/j.tsf.2012.12.053  JN:THIN SOLID FILMS  PY:2013
  TC:3  AU: Reddy, V. Annapu;Pathak, N. P.;Nath, R.;
7:2:53:1     Calibrated real-time detection of nonlinearly propagating strain waves
DOI:10.1103/PhysRevB.86.144306  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Bojahr, Andre;Herzog, Marc;Schick, Daniel;Vrejoiu, Ionela;Bargheer, Matias;
7:2:53:2     Comparing the oscillation phase in optical pump-probe spectra to ultrafast x-ray diffraction in the metal-dielectric SrRuO3/SrTiO3 superlattice
DOI:10.1103/PhysRevB.85.224302  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Bojahr, Andre;Schick, Daniel;Maerten, Lena;Herzog, Marc;Vrejoiu, Ionela;Schmising, Clemens von Korff;Milne, Chris;Johnson, Steven L.;Bargheer, Matias;
7:2:53:3     Direct time-domain sampling of subterahertz coherent acoustic phonon spectra in SrTiO3 using ultrafast x-ray diffraction
DOI:10.1103/PhysRevB.87.184301  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Shayduk, Roman;Herzog, Marc;Bojahr, Andre;Schick, Daniel;Gaal, Peter;Leitenberger, Wolfram;Navirian, Hengameh;Sander, Mathias;Goldshteyn, Jevgenij;Vrejoiu, Ionela;Bargheer, Matias;
7:2:53:4     Analysis of ultrafast X-ray diffraction data in a linear-chain model of the lattice dynamics
DOI:10.1007/s00339-011-6719-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:13  AU: Herzog, M.;Schick, D.;Gaal, P.;Shayduk, R.;Schmising, C. von Korff;Bargheer, M.;
7:2:53:5     Ultrafast manipulation of hard x-rays by efficient Bragg switches
DOI:10.1063/1.3402773  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Herzog, M.;Leitenberger, W.;Shayduk, R.;van der Veen, R. M.;Milne, C. J.;Johnson, S. L.;Vrejoiu, I.;Alexe, M.;Hesse, D.;Bargheer, M.;
7:2:53:6     Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scattering
DOI:10.1063/1.3593488  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Brivio, S.;Polli, D.;Crespi, A.;Osellame, R.;Cerullo, G.;Bertacco, R.;
7:2:53:7     Detecting optically synthesized quasi-monochromatic sub-terahertz phonon wavepackets by ultrafast x-ray diffraction
DOI:10.1063/1.3688492  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Herzog, M.;Bojahr, A.;Goldshteyn, J.;Leitenberger, W.;Vrejoiu, I.;Khakhulin, D.;Wulff, M.;Shayduk, R.;Gaal, P.;Bargheer, M.;
7:2:53:8     Following Strain-Induced Mosaicity Changes of Ferroelectric Thin Films by Ultrafast Reciprocal Space Mapping
DOI:10.1103/PhysRevLett.110.095502  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:5  AU: Schick, D.;Bojahr, A.;Herzog, M.;Gaal, P.;Vrejoiu, I.;Bargheer, M.;
7:2:53:9     Time-domain sampling of x-ray pulses using an ultrafast sample response
DOI:10.1063/1.4769828  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Gaal, P.;Schick, D.;Herzog, M.;Bojahr, A.;Shayduk, R.;Goldshteyn, J.;Navirian, H. A.;Leitenberger, W.;Vrejoiu, I.;Khakhulin, D.;Wulff, M.;Bargheer, M.;
7:2:53:10     Shortening x-ray pulses for pump-probe experiments at synchrotrons
DOI:10.1063/1.3601057  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Navirian, H. A.;Herzog, M.;Goldshteyn, J.;Leitenberger, W.;Vrejoiu, I.;Khakhulin, D.;Wulff, M.;Shayduk, R.;Gaal, P.;Bargheer, M.;
7:2:53:11     Response to "Comment on 'Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scattering'" [Appl. Phys. Lett. 100, 206101 (2012)]
DOI:10.1063/1.4717245  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Brivio, S.;Polli, D.;Crespi, A.;Osellame, R.;Cerullo, G.;Bertacco, R.;
7:2:53:12     Characterization of irradiation damage distribution near TiO2/SrTiO3 interfaces using coherent acoustic phonon interferometry
DOI:10.1063/1.4729621  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Yarotski, Dmitry;Fu, Engang;Yan, Li;Jia, Quanxi;Wang, Yongqiang;Taylor, Antoinette J.;Uberuaga, Blas P.;
7:2:53:13     Comment on "Observation of anomalous acoustic phonon dispersion in SrTiO3 by broadband stimulated Brillouin scattering" [Appl. Phys. Lett. 98, 211907 (2011)]
DOI:10.1063/1.4717244  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Devos, A.;Wen, Y. -C.;Mante, P. -A.;Sun, C. -K.;
7:2:53:14     Laser-excited acoustical phonons probed by ultrashort pulses from a laser-driven x-ray diode
DOI:10.1063/1.3577605  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Schulze, K. S.;Kaempfer, T.;Uschmann, I.;Hoefer, S.;Loetzsch, R.;Foerster, E.;
7:2:54:1     Strong strain dependence of ferroelectric coercivity in a BiFeO3 film
DOI:10.1063/1.3569137  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:23  AU: Biegalski, M. D.;Kim, D. H.;Choudhury, S.;Chen, L. Q.;Christen, H. M.;Doerr, K.;
7:2:54:2     Thickness effect on the dielectric, ferroelectric, and piezoelectric properties of ferroelectric lead zirconate titanate thin films
DOI:10.1063/1.3514170  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:29  AU: de la Cruz, J. Perez;Joanni, E.;Vilarinho, P. M.;Kholkin, A. L.;
7:2:54:3     Thickness-Dependent Dielectric, Ferroelectric, and Magnetodielectric Properties of BiFeO3 Thin Films Derived by Chemical Solution Deposition
DOI:10.1111/j.1551-2916.2011.04920.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:12  AU: Tang, Xianwu;Dai, Jianming;Zhu, Xuebin;Lin, Jianchao;Chang, Qing;Wu, Dajun;Song, Wenhai;Sun, Yuping;
7:2:54:4     Effect of the thickness of BiFeO3 layers on the magnetic and electric properties of BiFeO3/La0.7Sr0.3MnO3 heterostructures
DOI:10.1063/1.4811439  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Wang, Le;Wang, Zhen;Jin, Kui-juan;Li, Jian-qi;Yang, Huai-xin;Wang, Can;Zhao, Rui-qiang;Lu, Hui-bin;Guo, Hai-zhong;Yang, Guo-zhen;
7:2:54:5     Ferroelectric Behavior in Bismuth Ferrite Thin Films of Different Thickness
DOI:10.1021/am200801u  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2011
  TC:15  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:54:6     Thickness effect on the properties of BaTiO3-CoFe2O4 multilayer thin films prepared by chemical solution deposition
DOI:10.1016/j.jallcom.2013.11.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Dai, Y. Q.;Dai, J. M.;Tang, X. W.;Zhang, K. J.;Zhu, X. B.;Yang, J.;Sun, Y. P.;
7:2:54:7     Variation of ferroelectric properties in (Bi,Pr)(Fe,Mn)O-3/SrRuO3-Pt/CoFe2O4 layered film structure by applying direct current magnetic field
DOI:10.1063/1.4730334  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Liu, Chen;Kawae, Takeshi;Tsukada, Yoshinori;Morimoto, Akiharu;Naganuma, Hiroshi;Nakajima, Takashi;Okamura, Soichiro;
7:2:54:8     Repetition Rate Dependence of Ferroelectric Properties of Polycrystalline BiFeO3 Films Prepared by Pulsed Laser Deposition Method
DOI:10.1080/00150193.2013.842064  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Park, Jung Min;Nakashima, Seiji;Sohgawa, Masayuki;Kanashima, Takeshi;Okuyama, Masanori;
7:2:54:9     Hysteresis loops of polarization and magnetization in (BiNd0.05)(Fe0.97Mn0.03)O-3/Pt/CoFe2O4 layered epitaxial thin film grown by pulsed laser deposition
DOI:10.1016/j.tsf.2011.05.067  JN:THIN SOLID FILMS  PY:2011
  TC:7  AU: Kawae, Takeshi;Hu, Jie;Naganuma, Hiroshi;Nakajima, Takeshi;Terauchi, Yuki;Okamura, Soichiro;Morimoto, Akiharu;
7:2:54:10     Columnar Growth of BiFeO3 Films Prepared by Magnetic-field-assisted Pulsed Laser Deposition
DOI:10.1080/00150193.2014.894869  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kanashima, T.;Park, J. M.;Ricinschi, D.;Okuyama, M.;
7:2:54:11     Calorimetric investigations on cubic BaTiO3 and Ba0.9Nd0.1TiO3 systems
DOI:10.1016/j.jallcom.2010.07.077  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:4  AU: Babu, R.;Kandan, R.;Jena, Hrudananda;Kutty, K. V. Govindan;Nagarajan, K.;
7:2:55:1     Soft modes in strained and unstrained rutile TiO2
DOI:10.1103/PhysRevB.81.134303  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Mitev, Pavlin D.;Hermansson, Kersti;Montanari, Barbara;Refson, Keith;
7:2:55:2     Phonon calculations in cubic and tetragonal phases of SrTiO3: A comparative LCAO and plane-wave study
DOI:10.1103/PhysRevB.83.134108  JN:PHYSICAL REVIEW B  PY:2011
  TC:25  AU: Evarestov, Robert A.;Blokhin, Evgeny;Gryaznov, Denis;Kotomin, Eugene A.;Maier, Joachim;
7:2:55:3     Jahn-Teller effect in the phonon properties of defective SrTiO3 from first principles
DOI:10.1103/PhysRevB.85.174303  JN:PHYSICAL REVIEW B  PY:2012
  TC:17  AU: Evarestov, Robert;Blokhin, Evgeny;Gryaznov, Denis;Kotomin, Eugene A.;Merkle, Rotraut;Maier, Joachim;
7:2:55:4     First-principles study of the influence of (110)-oriented strain on the ferroelectric properties of rutile TiO2
DOI:10.1103/PhysRevB.84.132105  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Gruenebohm, A.;Ederer, C.;Entel, P.;
7:2:55:5     First-principles investigation of incipient ferroelectric trends of rutile TiO2 in bulk and at the (110) surface
DOI:10.1103/PhysRevB.87.054110  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Gruenebohm, A.;Entel, P.;Ederer, C.;
7:2:55:6     First-Principles Study of the Influence of (110) Strain on the Ferroelectric Trends of TiO2
DOI:10.1080/00150193.2012.676945  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Gruenebohm, A.;Siewert, M.;Ederer, C.;Entel, P.;
7:2:55:7     Reply to "Comment on 'First-principles study of the influence of (110)-oriented strain on the ferroelectric properties of rutile TiO2'"
DOI:10.1103/PhysRevB.88.136102  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Gruenebohm, A.;Ederer, C.;Entel, P.;
7:2:55:8     Comment on "First-principles study of the influence of (110)-oriented strain on the ferroelectric properties of rutile TiO2"
DOI:10.1103/PhysRevB.88.136101  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Refson, Keith;Montanari, Barbara;Mitev, Pavlin D.;Hermansson, Kersti;Harrison, Nicholas M.;
7:2:55:9     Ab initio study of the electronic and magnetic structure of the TiO2 rutile (110)/Fe interface
DOI:10.1103/PhysRevB.88.155401  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Gruenebohm, Anna;Entel, Peter;Herper, Heike C.;
7:2:55:10     Theoretical modeling of the complexes of iron impurities and oxygen vacancies in SrTiO3
DOI:10.1063/1.4796182  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Blokhin, Evgeny;Kotomin, Eugene;Kuzmin, Alexei;Purans, Juris;Evarestov, Robert;Maier, Joachim;
7:2:55:11     Physical Origin of General Oscillation of Structure, Surface Energy, and Electronic Property in Rutile TiO2 Nanoslab
DOI:10.1021/am300193d  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:4  AU: He, T.;Li, J. L.;Yang, G. W.;
7:2:55:12     Pseudopotential errors in titanium
DOI:10.1016/j.commatsci.2010.12.033  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:3  AU: Tegner, Bengt E.;Ackland, Graeme J.;
7:2:55:13     Titanium Dioxide (TiO2) Nanopowder Prepared by the Low Temperature Solvothermal Method
DOI:10.1080/00150193.2013.846775  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Pookmanee, P.;Phiwchai, I.;Yoriya, S.;Puntharod, R.;Sangsrichan, S.;Phanichphant, S.;
7:2:55:14     Hydrothermal synthesis of brookite-type titanium dioxide with snowflake-like nanostructures using a water-soluble citratoperoxotitanate complex
DOI:10.1016/j.jcrysgro.2011.09.046  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:10  AU: Kobayashi, Makoto;Petrykin, Valery;Tomita, Koji;Kakihana, Masato;
7:2:55:15     A Comparative Hybrid DFT Study of Phonons in Several SrTiO3 Phases
DOI:10.1080/10584587.2011.570591  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Blokhin, Evgeny;Gryaznov, Denis;Kotomin, Eugene;Evarestov, Robert;Maier, Joachim;
7:2:56:1     Controlling the magnetic characters co-existing at the novel nanometric multiferroic PrAlxFe1-xO3; 0.0 <= x <= 0.6 via an exchange bias interaction to open a new era of applications
DOI:10.1016/j.jallcom.2014.03.164  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Khafagy, Rasha M.;El-Khawas, E. H.;
7:2:56:2     Phase equilibrium of Bi2O3-Fe2O3 pseudo-binary system and growth of BiFeO3 single crystal
DOI:10.1016/j.jcrysgro.2010.10.181  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:15  AU: Lu, J.;Qiao, L. J.;Fu, P. Z.;Wu, Y. C.;
7:2:56:3     Giant dielectric response and enhanced thermal stability of multiferroic BiFeO3
DOI:10.1016/j.jallcom.2014.02.128  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Lin, Peng;Cui, Simin;Zeng, Xierong;Huang, Haitao;Ke, Shanming;
7:2:56:4     Direct piezoelectric properties of (100) and (111) BiFeO3 epitaxial thin films
DOI:10.1063/1.3692579  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:17  AU: Ujimoto, K.;Yoshimura, T.;Ashida, A.;Fujimura, N.;
7:2:56:5     Synthesis peculiarities of BiVO3 perovskite
DOI:10.1016/j.ceramint.2012.12.035  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Dragomir, Mirela;Valant, Matjaz;
7:2:56:6     Varistor and Magnetic Properties of Nickel Copper Zinc Niobium Ferrite Doped with Bi2O3
DOI:10.1111/jace.13243  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Mei, Li-Then;Hsiang, Hsing-I;Hsu, Wei-Hung;
7:2:56:7     Ferromagnetic properties and conversion-electron Mossbauer spectroscopy of (La2O3)(x)-(Bi2O3)(1-x)-Fe2O3 films
DOI:10.1016/j.matlet.2013.03.006  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Xiao, RenZheng;Pelenovich, Vasiliy O.;Fu, Dejun;
7:2:56:8     High permittivity Bi24Fe2O39 thin films prepared by a low temperature process
DOI:10.1063/1.3524492  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Zhu, X. H.;Defay, E.;Lee, Y.;Andre, B.;Aid, M.;Zhu, J. L.;Xiao, D. Q.;Zhu, J. G.;
7:2:56:9     Microwave Sintering of Multilayer Integrated Passive Devices
DOI:10.1111/j.1551-2916.2010.03740.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Vaidhyanathan, Balasubramaniam;Annapoorani, Ketharam;Binner, Jon;Raghavendra, Ramesh;
7:2:56:10     High permittivity 0.9Pb(Mg1/3Nb2/3)O-3-0.1PbTiO(3) relaxor thin films for high-value, wide-temperature capacitor applications
DOI:10.1063/1.4751028  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Zhu, Xiaohong;Defay, Emmanuel;Le Rhun, Gwenael;Aid, Marc;Xu, Yunhui;Zhang, Qiang;Xiao, Yunjun;Gao, Haobin;Liang, Dayun;Zhu, Jiliang;Zhu, Jianguo;Xiao, Dingquan;
7:2:56:11     Phase and morphology evolution of bismuth ferrites via hydrothermal reaction route
DOI:10.1016/j.materresbull.2013.01.032  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:7  AU: Yang, Xin;Zhang, Yanfang;Xu, Gang;Wei, Xiao;Ren, Zhaohui;Shen, Ge;Han, Gaorong;
7:2:56:12     Photophysical and photocatalytic water splitting performance of stibiotantalite type-structure compounds, SbMO4 (M = Nb, Ta)
DOI:10.1016/j.ijhydene.2012.08.123  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2012
  TC:7  AU: Kim, Sang Hyeon;Park, Sangbaek;Lee, Chan Woo;Han, Byung Suh;Seo, Se Won;Kim, Ju Seong;Cho, In Sun;Hong, Kug Sun;
7:2:57:1     Improved ferroelectric behavior in (110) oriented BiFeO3 thin films
DOI:10.1063/1.3296226  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:36  AU: Wu, Jiagang;Wang, John;
7:2:57:2     Exchange bias induced by domain walls in BiFeO3
DOI:10.1103/PhysRevB.82.064408  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Livesey, K. L.;
7:2:57:3     Driving mechanism of exchange bias and magnetic anisotropy in multiferroic polycrystalline BiFeO3/permalloy bilayers
DOI:10.1063/1.4763480  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Hauguel, Tony;Pogossian, Souren P.;Dekadjevi, David T.;Spenato, David;Jay, Jean-Philippe;Ben Youssef, Jamal;
7:2:57:4     A giant polarization value in bismuth ferrite thin films
DOI:10.1016/j.jallcom.2011.08.056  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Wang, Yuanyu;
7:2:57:5     Sputter-prepared BiFeO3(001) films on L1(0) FePt(001)/glass substrates
DOI:10.1063/1.3679003  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Chang, H. W.;Yuan, F. T.;Shih, C. W.;Wang, C. R.;Chang, W. C.;Jen, S. U.;
7:2:57:6     Exchange bias in sputtered FM/BiFeO3 thin films (FM = Fe and Co)
DOI:10.1063/1.3677801  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Chang, H. W.;Yuan, F. T.;Shih, C. W.;Li, W. L.;Chen, P. H.;Wang, C. R.;Chang, W. C.;Jen, S. U.;
7:2:57:7     Strong exchange bias with the (110)-oriented BiFeO3 films
DOI:10.1063/1.4748160  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Bai, Feiming;Yu, Guo;Wang, Yicheng;Jin, Lichuan;Zeng, Huizhong;Tang, Xiaoli;Zhong, Zhiyong;Zhang, Huaiwu;
7:2:57:8     Experimental evidence for exchange bias in polycrystalline BiFeO3/Ni81Fe19 thin films
DOI:10.1063/1.3636098  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Hauguel, Tony;Pogossian, Souren P.;Dekadjevi, David T.;Spenato, David;Jay, Jean-Philippe;Indenbom, Mikhail V.;Ben Youssef, Jamal;
7:2:57:9     Formation of perovskite BiFeO3(001) films on refined Pt(111) electrode layer with reduced thickness on glass substrates
DOI:10.1063/1.4868700  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Chang, H. W.;Yuan, F. T.;Tien, S. H.;Tu, K. T.;Wang, C. R.;Jen, S. U.;
7:2:57:10     Highly (111)-oriented multiferroic BiFeO3 thin film on a glass substrate
DOI:10.1016/j.jcrysgro.2013.01.012  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:2  AU: Maeng, W. J.;Son, J. Y.;
7:2:57:11     Enhancement of magnetoresistance using CoFe/Ru/CoFe synthetic ferrimagnetic pinned layer in BiFeO3 based spin-valves
DOI:10.1063/1.4745504  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Naganuma, Hiroshi;Bae, In-Tae;Miyazaki, Takamichi;Kubota, Miho;Inami, Nobuhito;Kawada, Yuki;Oogane, Mikihiko;Mizukami, Shigemi;Han, X. F.;Ando, Yasuo;
7:2:57:12     Exchange biases of Co, Py, Co40Fe40B20, Co75Fe25, and Co50Fe50 on epitaxial BiFeO3 films prepared by chemical solution deposition
DOI:10.1063/1.3563061  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Naganuma, Hiroshi;Oogane, Mikihiko;Ando, Yasuo;
7:2:57:13     High quality multiferroic BiFeO3 films prepared by pulsed laser deposition on glass substrates at reduced temperatures
DOI:10.1063/1.4796194  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Chang, H. W.;Yuan, F. T.;Tien, S. H.;Li, P. Y.;Wang, C. R.;Tu, C. S.;Jen, S. U.;
7:2:57:14     Exchange bias and crystal structure of epitaxial (111) FePt/BiFeO3 sputtered thin films
DOI:10.1063/1.4863171  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chiu, Shang-Jui;Huang, Li-Chun;Hsiao, Shih-Nan;Chang, Huang-Wei;Yu, Ge-Ping;Lee, Hsin-Yi;
7:2:58:1     Free-Standing Ferroelectric Nanotubes Processed via Soft-Template Infiltration
DOI:10.1002/adma.201103993  JN:ADVANCED MATERIALS  PY:2012
  TC:19  AU: Bernal, Ashley;Tselev, Alexander;Kalinin, Sergei;Bassiri-Gharb, Nazanin;
7:2:58:2     Finite Curvature-Mediated Ferroelectricity
DOI:10.1021/nl903384p  JN:NANO LETTERS  PY:2010
  TC:18  AU: Nonnenmann, Stephen S.;Leaffer, Oren D.;Gallo, Eric M.;Coster, Michael T.;Spanier, Jonathan E.;
7:2:58:3     Spatial Charge Separation in Asymmetric Structure of Au Nanoparticle on TiO2 Nanotube by Light-Induced Surface Potential Imaging
DOI:10.1021/nl501381a  JN:NANO LETTERS  PY:2014
  TC:9  AU: Yoo, Hyunjun;Bae, Changdeuck;Yang, Yunjeong;Lee, Seonhee;Kim, Myungjun;Kim, Hyunchul;Kim, Yunseok;Shin, Hyunjung;
7:2:58:4     The Ferroelectric Field Effect within an Integrated Core/Shell Nanowire
DOI:10.1002/adfm.201200865  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:4  AU: Nonnenmann, Stephen S.;Islam, Mohammad A.;Beatty, Brian R.;Gallo, Eric M.;McGuckin, Terrence;Spanier, Jonathan E.;
7:2:58:5     Phononic Crystals for Shaping Fluids
DOI:10.1002/adma.201004455  JN:ADVANCED MATERIALS  PY:2011
  TC:27  AU: Bourquin, Yannyk;Wilson, Rab;Zhang, Yi;Reboud, Julien;Cooper, Jonathan M.;
7:2:58:6     Magneto-elastic tuning of ferroelectricity within a magnetoelectric nanowire
DOI:10.1063/1.3657152  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Johnson, Stephanie H.;Finkel, Peter;Leaffer, Oren D.;Nonnenmann, Stephen S.;Bussmann, Konrad;Spanier, Jonathan E.;
7:2:58:7     Effects of lateral and substrate constraint on the piezoresponse of ferroelectric nanostructures
DOI:10.1063/1.4751343  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Bernal, A.;Tselev, A.;Kalinin, Sergei;Bassiri-Gharb, Nazanin;
7:2:58:8     Visualization of three dimensional domain structures in ferroelectric PbTiO3 nanotubes
DOI:10.1063/1.4813239  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Yoo, Hyunjun;Bae, Changdeuck;Kim, Myungjun;Hong, Seungbum;No, Kwangsoo;Kim, Yunseok;Shin, Hyunjung;
7:2:58:9     The atomic layer deposition array defined by etch-back technique: a new method to fabricate TiO2 nanopillars, nanotubes and nanochannel arrays
DOI:10.1088/0957-4484/23/48/485306  JN:NANOTECHNOLOGY  PY:2012
  TC:4  AU: Huang, Yujian;Pandraud, Gregory;Sarro, Pasqualina M.;
7:2:58:10     Effects of Wall Thickness on Morphology and Structure of Lead Titanate Nanotubes
DOI:10.1080/00150193.2013.842730  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Han, Jin Kyu;Choi, Yong Chan;Kwak, Jin Ho;Bu, Sang Don;
7:2:58:11     Three dimensional piezoresponse force microscopy polarization difference maps
DOI:10.1063/1.3560773  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Jing, Yuanyuan;Blendell, John E.;Bowman, Keith J.;
7:2:58:12     Incorporation of lead and titanium into a porous alumina membrane during Pb(Zr0.52Ti0.48)O-3 nanotube synthesis
DOI:10.1063/1.4742979  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Han, Jin Kyu;Kim, Jongok;Bu, Sang Don;
7:2:59:1     Epitaxial properties of ZnO thin films on LaAlO3 substrates by pulsed laser deposition
DOI:10.1016/j.jcrysgro.2015.01.029  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Jia, C. H.;Wang, S.;Wu, Y. H.;Chen, Y. H.;Sun, X. W.;Zhang, W. F.;
7:2:59:2     Three-state resistive switching in CoFe2O4/Pb(Zr0.52Ti0.48)O-3/ZnO heterostructure
DOI:10.1063/1.4730965  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Li, Ziwei;Zhou, Mingxiu;Ding, Wangfeng;Zhou, Hang;Chen, Bo;Wan, Jian-Guo;Liu, Jun-Ming;Wang, Guanghou;
7:2:59:3     Interface polarization coupling in piezoelectric-semiconductor ferroelectric heterostructures
DOI:10.1103/PhysRevB.81.195307  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Voora, Venkata M.;Hofmann, T.;Brandt, M.;Lorenz, M.;Grundmann, M.;Ashkenov, N.;Schmidt, H.;Ianno, N.;Schubert, M.;
7:2:59:4     Semiconductor layer thickness impact on optical and resistive switching behavior of pulsed laser deposited BaTiO3/ZnO heterostructures
DOI:10.1063/1.4809531  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Sekhar, K. C.;Silva, J. P. B.;Kamakshi, Koppole;Pereira, M.;Gomes, M. J. M.;
7:2:59:5     Reversible metal-insulator transition in LaAlO3 thin films mediated by intragap defects: An alternative mechanism for resistive switching
DOI:10.1103/PhysRevB.84.165106  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Liu, Z. Q.;Leusink, D. P.;Lu, W. M.;Wang, X.;Yang, X. P.;Gopinadhan, K.;Lin, Y. T.;Annadi, A.;Zhao, Y. L.;Barman, A. Roy;Dhar, S.;Feng, Y. P.;Su, H. B.;Xiong, G.;Venkatesan, T.;Ariando;
7:2:59:6     Different nonvolatile memory effects in epitaxial Pt/PbZr0.3Ti0.7O3/LSCO heterostructures
DOI:10.1063/1.3460141  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Choi, Jinsik;Kim, Jin-Soo;Hwang, Inrok;Hong, Sahwan;Byun, Ik-Su;Lee, Seung-Woong;Kang, Sung-Oong;Park, Bae Ho;
7:2:59:7     Enhanced tunnel magnetoresistance in fully epitaxial ZnO:Co-based magnetic tunnel junctions with Mg-doped ZnO barrier
DOI:10.1063/1.3698151  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: He, Shumin;Bai, Hongliang;Liu, Guolei;Li, Qiang;Yan, Shishen;Chen, Yanxue;Mei, Liangmo;Liu, Houfang;Wang, Shouguo;Han, Xiufeng;
7:2:59:8     Investigation of ZnO thin films deposited on ferromagnetic metallic buffer layer by molecular beam epitaxy toward realization of ZnO-based magnetic tunneling junctions
DOI:10.1063/1.4794875  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Belmoubarik, M.;Nozaki, T.;Endo, H.;Sahashi, M.;
7:2:59:9     Defect dynamics and spectral observation of twinning in single crystalline LaAlO3 under subbandgap excitation
DOI:10.1063/1.3543840  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Chen, J. Q.;Wang, X.;Lu, Y. H.;Barman, A. Roy;You, G. J.;Xing, G. C.;Sum, T. C.;Dhar, S.;Feng, Y. P.;Ariando;Xu, Q-H.;Venkatesan, T.;
7:2:59:10     Microstructure of a-plane ZnO grown on LaAlO3 (001)
DOI:10.1016/j.tsf.2009.09.186  JN:THIN SOLID FILMS  PY:2010
  TC:7  AU: Wang, Wei-Lin;Peng, Chun-Yen;Ho, Yen-Teng;Chang, Li;
7:2:59:11     Defects in nonpolar (13(4)over-bar0) ZnO epitaxial film grown on (114) LaAlO3 substrate
DOI:10.1116/1.4830275  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2014
  TC:1  AU: Yen, Tzu-Chun;Wang, Wei-Lin;Peng, Chun-Yen;Tian, Jr-Sheng;Ho, Yen-Teng;Chang, Li;
7:2:59:12     Optical properties of BaTiO3/ZnO heterostructures under the effect of an applied bias
DOI:10.1016/j.tsf.2010.12.064  JN:THIN SOLID FILMS  PY:2011
  TC:2  AU: Boentgen, T.;Schoeche, S.;Schmidt-Grund, R.;Sturm, C.;Brandt, M.;Hochmuth, H.;Lorenz, M.;Grundmann, M.;
7:2:59:13     The role of the interface structure on the growth of nonpolar (10(1)over-bar0) and semipolar (11(2)over-bar(2)over-bar) ZnO on (112) LaAlO3 substrates
DOI:10.1016/j.matlet.2013.07.069  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Tian, Jr-Sheng;Wu, Yue-Han;Wang, Wei-Lin;Yen, Tzu-Chun;Ho, Yen-Teng;Chang, Li;
7:2:60:1     Electrical transport behavior of lead-free 0.5Ba(Zr0.2Ti0.8)O-3-0.5 (Ba0.7Ca0.3)TiO3 thin film grown on LaNiO3/Si by pulsed laser deposition
DOI:10.1016/j.jallcom.2014.01.160  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Bhardwaj, Chandan;Kaur, Davinder;
7:2:60:2     Leakage mechanism of cation -modified BiFeO3 thin film
DOI:10.1063/1.3601362  JN:AIP ADVANCES  PY:2011
  TC:24  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:60:3     Influence of La and Mn dopants on the current-voltage characteristics of BiFeO3/ZnO heterojunction
DOI:10.1063/1.3699033  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Xu, Jianlong;Jia, Ze;Zhang, Naiwen;Ren, Tianling;
7:2:60:4     Multiferroic properties and temperature-dependent leakage mechanism of Sc-substituted bismuth ferrite-lead titanate thin films
DOI:10.1016/j.scriptamat.2010.11.015  JN:SCRIPTA MATERIALIA  PY:2011
  TC:17  AU: Yan, F.;Miao, S.;Sterianou, I.;Reaney, I. M.;Lai, M. O.;Lu, L.;Song, W. D.;
7:2:60:5     Temperature-dependent leakage current characteristics of Pr and Mn cosubstituted BiFeO3 thin films
DOI:10.1063/1.3432083  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:18  AU: Wen, Zheng;Shen, Xuan;Wu, Jingxian;Wu, Di;Li, Aidong;Yang, Bin;Wang, Zhu;Chen, Hengzhi;Wang, Junling;
7:2:60:6     Leakage behavior and conduction mechanisms of Ba(Ti0.85Sn0.15)O-3/Bi1.5Zn1.0Nb1.5O7 heterostructures
DOI:10.1063/1.3406136  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Wang, S. J.;Miao, S.;Reaney, I. M.;Lai, M. O.;Lu, L.;
7:2:60:7     Enhanced tunable and pyroelectric properties of Ba(Ti0.85Sn0.15)O-3 thin films with Bi1.5Zn1.0Nb1.5O7 buffer layers
DOI:10.1063/1.3309419  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Wang, S. J.;Miao, S.;Reaney, I. M.;Lai, M. O.;Lu, L.;
7:2:60:8     Leakage Current and Dielectric Properties of Integrated Ferroelectric Capacitor Etched in Non-Crystalline Phase
DOI:10.1080/10584587.2012.660833  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Wang, Longhai;Tian, Bin;Zou, Lianying;Cheng, Hao;Huang, Danxia;Dai, Ying;Yang, Lei;
7:2:61:1     Evidence of Superior Ferroelectricity in Structurally Welded ZnSnO3 Nanowire Arrays
DOI:10.1002/smll.201401249  JN:SMALL  PY:2014
  TC:1  AU: Datta, Anuja;Mukherjee, Devajyoti;Kons, Corisa;Witanachchi, Sarath;Mukherjee, Pritish;
7:2:61:2     Intrinsic anomalous ferroelectricity in vertically aligned LiNbO3-type ZnSnO3 hybrid nanoparticle-nanowire arrays
DOI:10.1063/1.4902557  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Mukherjee, Devajyoti;Datta, Anuja;Kons, Corisa;Hordagoda, Mahesh;Witanachchi, Sarath;Mukherjee, Pritish;
7:2:61:3     First-Principles Studies on Novel Polar Oxide ZnSnO3, Pressure-Induced Phase Transition and Electric Properties
DOI:10.1002/adma.200903432  JN:ADVANCED MATERIALS  PY:2010
  TC:21  AU: Nakayama, Masanobu;Nogami, Masayuki;Yoshida, Masashi;Katsumata, Tetsuhiro;Inaguma, Yoshiyuki;
7:2:61:4     Joining Copper Oxide Nanotube Arrays Driven by the Nanoscale Kirkendall Effect
DOI:10.1002/smll.201202533  JN:SMALL  PY:2013
  TC:8  AU: Chun, Shu Rong;Sasangka, Wardhana Aji;Ng, Mei Zhen;Liu, Qing;Du, Anyan;Zhu, Jie;Ng, Chee Mang;Liu, Zhi Qiang;Chiam, Sing Yang;Gan, Chee Lip;
7:2:61:5     Energetic stability, structural transition, and thermodynamic properties of ZnSnO3
DOI:10.1063/1.3562013  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Gou, Huiyang;Zhang, Jingwu;Li, Zhiping;Wang, Gongkai;Gao, Faming;Ewing, Rodney C.;Lian, Jie;
7:2:61:6     Structural identification, electronic and optical properties of ZnSnO3: First principle calculations
DOI:10.1016/j.commatsci.2010.05.049  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2010
  TC:11  AU: Gou, Huiyang;Gao, Faming;Zhang, Jingwu;
7:2:61:7     Controlled synthesis and structure tunability of photocatalytically active mesoporous metal-based stannate nanostructures
DOI:10.1016/j.apsusc.2014.01.030  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:3  AU: Liu, Caihong;Chen, Haiyan;Ren, Zheng;Dardona, Sameh;Piech, Martin;Gao, Haiyong;Gao, Pu-Xian;
7:2:62:1     Oxygen concentration and its effect on the leakage current in BiFeO3 thin films
DOI:10.1063/1.3291044  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:48  AU: Yang, H.;Wang, Y. Q.;Wang, H.;Jia, Q. X.;
7:2:62:2     Improved ferroelectric property of very thin Mn-doped BiFeO3 films by an inlaid Al2O3 tunnel switch
DOI:10.1063/1.3647777  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Lee, Hyun Ju;Park, Min Hyuk;Kim, Yu Jin;Hwang, Cheol Seong;Kim, Jeong Hwan;Funakubo, Hiroshi;Ishiwara, Hiroshi;
7:2:62:3     The improved polarization retention through high-field charge injection in highly strained BiFeO3 thin films with preferred domain orientations
DOI:10.1063/1.3697989  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Liu, X. B.;Ding, N. F.;Jiang, A. Q.;Yang, P. X.;
7:2:62:4     Polarization reversal behavior in the Pt/Pb(Zr,Ti)O-3/Pt and Pt/Al2O3/Pb(Zr,Ti)O-3/Pt capacitors for different reversal directions
DOI:10.1063/1.3435484  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Lee, Hyun Ju;Kim, Gun Hwan;Park, Min Hyuk;Jiang, An-Quan;Hwang, Cheol Seong;
7:2:62:5     Nanosecond-range imprint and retention characterized from polarization-voltage hysteresis loops in insulating or leaky ferroelectric thin films
DOI:10.1063/1.3647577  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Jiang, A. Q.;Liu, X. B.;Zhang, Q.;
7:2:62:6     Tristate Memory Using Ferroelectric-Insulator-Semiconductor Heterojunctions for 50% Increased Data Storage
DOI:10.1002/adfm.201101073  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:3  AU: Park, Min Hyuk;Lee, Hyun Ju;Kim, Gun Hwan;Kim, Yu Jin;Kim, Jeong Hwan;Lee, Jong Ho;Hwang, Cheol Seong;
7:2:62:7     Nonlinear antiferroelectric-like capacitance-voltage curves in ferroelectric BiFeO3 thin films
DOI:10.1063/1.4812217  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Jiang, A. Q.;Zhang, D. W.;Tang, T. A.;
7:2:62:8     Structural and electrical properties of BiFeO3 thin films by solution deposition and microwave annealing
DOI:10.1016/j.tsf.2011.01.076  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Huang, A.;Shannigrahi, S. R.;
7:2:62:9     Leakage Current Behaviors of SrTiO3/BiFeO3 Multi-Layers Fabricated by Pulsed Laser Deposition
DOI:10.1080/10584587.2012.665313  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:2  AU: Kim, S. W.;Choi, H. I.;Lee, M. H.;Do, D.;Kim, S. S.;Kim, M. H.;Song, T. K.;Kim, W. J.;
7:2:62:10     Effects of Annealing Atmosphere on Structure and Electrical Properties of (Bi0.9Eu0.1) (Fe0.9Mn0.1)O-3 Thin Films
DOI:10.1080/10584587.2012.660436  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Kim, J. W.;Raghavan, C. M.;Do, D.;Song, T. K.;Kim, S. S.;
7:2:62:11     Morphology and orientation of iron oxide precipitates in epitaxial BiFeO3 thin films grown under two non-optimized oxygen pressures
DOI:10.1080/14786435.2010.515261  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:2  AU: Wang, X.;Zhu, Y. L.;Mi, S. B.;Wang, C.;Lu, H. B.;Ma, X. L.;
7:2:62:12     Leakage Current Behaviors of SrTiO3 Capped Mn-doped Polycrystalline BiFeO3 Thin Film
DOI:10.1080/00150193.2013.842451  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Kim, S. W.;Lee, M. H.;Choi, H. I.;Kim, D. J.;Park, J. S.;Kim, M. H.;Song, T. K.;Do, D.;Kim, W. J.;
7:2:63:1     Interplay of Coulomb blockade and ferroelectricity in nanosized granular materials
DOI:10.1103/PhysRevB.89.054203  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Udalov, O. G.;Chtchelkatchev, N. M.;Glatz, A.;Beloborodov, I. S.;
7:2:63:2     Interplay of ferroelectricity and single electron tunneling
DOI:10.1103/PhysRevB.89.155410  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Fedorov, S. A.;Korolkov, A. E.;Chtchelkatchev, N. M.;Udalov, O. G.;Beloborodov, I. S.;
7:2:63:3     Coupling of ferroelectricity and ferromagnetism through Coulomb blockade in composite multiferroics
DOI:10.1103/PhysRevB.89.174203  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Udalov, O. G.;Chtchelkatchev, N. M.;Beloborodov, I. S.;
7:2:63:4     Proximity coupling of a granular film with a ferroelectric substrate and giant electroresistance effect
DOI:10.1103/PhysRevB.90.054201  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Udalov, O. G.;Chtchelkatchev, N. M.;Beloborodov, I. S.;
7:2:63:5     Single grain heating due to inelastic cotunneling
DOI:10.1103/PhysRevB.81.033408  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Glatz, Andreas;Beloborodov, I. S.;
7:2:63:6     Universality and quantization of the power-to-heat ratio in nanogranular systems
DOI:10.1103/PhysRevB.88.125130  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Chtchelkatchev, N. M.;Glatz, A.;Beloborodov, I. S.;
7:2:63:7     Relaxation dynamics of the electron distribution in the Coulomb-blockade problem
DOI:10.1103/PhysRevB.82.155317  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Rodionov, Ya. I.;Burmistrov, I. S.;Chtchelkatchev, N. M.;
7:2:63:8     Heating effects in a chain of quantum dots
DOI:10.1103/PhysRevB.82.075314  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Glatz, A.;Beloborodov, I. S.;Chtchelkatchev, N. M.;Vinokur, V. M.;
7:2:63:9     Giant quantum freezing of nanojunctions mediated by the environment
DOI:10.1103/PhysRevB.84.235101  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Glatz, A.;Chtchelkatchev, N. M.;Beloborodov, I. S.;Vinokur, V.;
7:2:63:10     Nonlinear transport characteristics of mesoscopic tunnel junctions far from equilibrium
DOI:10.1103/PhysRevB.86.045440  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Glatz, A.;Chtchelkatchev, N. M.;Beloborodov, I. S.;
7:2:63:11     Transport mechanism in granular Ni deposited on carbon nanotubes fibers
DOI:10.1103/PhysRevB.86.115117  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Salvato, M.;Lucci, M.;Ottaviani, I.;Cirillo, M.;Tamburri, E.;Orlanducci, S.;Terranova, M. L.;Notarianni, M.;Young, C. C.;Behabtu, N.;Pasquali, M.;
7:2:63:12     Effect of potassium doping on electrical properties of carbon nanotube fibers
DOI:10.1103/PhysRevB.84.233406  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Salvato, M.;Lucci, M.;Ottaviani, I.;Cirillo, M.;Tamburri, E.;Cianchetta, I.;Guglielmotti, V.;Orlanducci, S.;Terranova, M. L.;Pasquali, M.;
7:2:64:1     Strain-induced control of domain wall morphology in ultrathin PbTiO3 films
DOI:10.1103/PhysRevB.89.214113  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Jiang, Zhijun;Zhang, Ruizhi;Wang, Dawei;Sichuga, D.;Jia, C. -L.;Bellaiche, L.;
7:2:64:2     Tailoring properties of ferroelectric ultrathin films by partial charge compensation
DOI:10.1063/1.4861639  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Glazkova, E.;McCash, Kevin;Chang, C-M.;Mani, B. K.;Ponomareva, I.;
7:2:64:3     Epitaxial Pb(Zr, Ti)O-3 Ultrathin Films under Open-Circuit Electrical Boundary Conditions
DOI:10.1103/PhysRevLett.106.196102  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:10  AU: Sichuga, David;Bellaiche, L.;
7:2:64:4     Chiral Patterns of Tilting of Oxygen Octahedra in Zero-Dimensional Ferroelectrics and Multiferroics: A First Principle-Based Study
DOI:10.1103/PhysRevLett.104.207603  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:9  AU: Sichuga, David;Ren, Wei;Prosandeev, Sergey;Bellaiche, L.;
7:2:64:5     Twin Motion Faster Than the Speed of Sound
DOI:10.1103/PhysRevLett.104.155501  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:8  AU: Faran, Eilon;Shilo, Doron;
7:2:64:6     Domain evolution in epitaxial (001) Pb(Zr,Ti)O-3 ultrathin films under an electric field applied along the [111] direction
DOI:10.1103/PhysRevB.85.214111  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Sichuga, D.;Bellaiche, L.;
7:2:64:7     Nanodynamics of Ferroelectric Ultrathin Films
DOI:10.1103/PhysRevLett.107.177601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:10  AU: Zhang, Qingteng;Herchig, R.;Ponomareva, I.;
7:2:64:8     Atomistic study of soft-mode dynamics in PbTiO3
DOI:10.1103/PhysRevB.88.064306  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Mani, B. K.;Chang, C. -M.;Ponomareva, I.;
7:2:64:9     Domain wall fluctuations in ferroelectrics coupled to strain
DOI:10.1103/PhysRevB.89.184104  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Brierley, R. T.;Littlewood, P. B.;
7:2:65:1     Semiconducting ferroelectric photovoltaics through Zn2+ doping into KNbO3 and polarization rotation
DOI:10.1103/PhysRevB.89.235105  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wang, Fenggong;Grinberg, Ilya;Rappe, Andrew M.;
7:2:65:2     Post density functional theoretical studies of highly polar semiconductive Pb(Ti1-xNix)O3-x solid solutions: Effects of cation arrangement on band gap
DOI:10.1103/PhysRevB.83.205115  JN:PHYSICAL REVIEW B  PY:2011
  TC:19  AU: Gou, G. Y.;Bennett, J. W.;Takenaka, H.;Rappe, A. M.;
7:2:65:3     Structural phase transition, narrow band gap, and room-temperature ferromagnetism in [KNbO3](1-x)[BaNi1/2Nb1/2O3-delta](x) ferroelectrics
DOI:10.1063/1.4896317  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhou, Wenliang;Deng, Hongmei;Yang, Pingxiong;Chu, Junhao;
7:2:65:4     Pb-free semiconductor ferroelectrics: A theoretical study of Pd-substituted Ba(Ti1-xCex)O-3 solid solutions
DOI:10.1103/PhysRevB.82.184106  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Bennett, Joseph W.;Grinberg, Ilya;Davies, Peter K.;Rappe, Andrew M.;
7:2:65:5     First-principles study of band gap engineering via oxygen vacancy doping in perovskite ABB ' O-3 solid solutions
DOI:10.1103/PhysRevB.84.245206  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Qi, Tingting;Curnan, Matthew T.;Kim, Seungchul;Bennett, Joseph W.;Grinberg, Ilya;Rappe, Andrew M.;
7:2:65:6     Band-gap engineering via local environment in complex oxides
DOI:10.1103/PhysRevB.83.224108  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Qi, Tingting;Grinberg, Ilya;Rappe, Andrew M.;
7:2:65:7     Band gap engineering strategy via polarization rotation in perovskite ferroelectrics
DOI:10.1063/1.4871707  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Wang, Fenggong;Grinberg, Ilya;Rappe, Andrew M.;
7:2:65:8     Modified structure and electrical properties of BSZT doped KNN hybrid ceramic
DOI:10.1007/s00339-012-6970-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Rani, Jyoti;Yadav, K. L.;Prakash, Satya;
7:2:65:9     An alternative approach of solid-state reaction to prepare nanocrystalline KNbO3
DOI:10.1007/s10853-010-4431-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:6  AU: Su, Tingting;Jiang, Heng;Gong, Hong;Zhai, Yuchun;
7:2:66:1     Diodelike and resistive hysteresis behavior of heterolayered BiFeO3/ZnO ferroelectric thin films
DOI:10.1063/1.3500498  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:21  AU: Wu, Jiagang;Wang, John;
7:2:66:2     ZnO as a buffer layer for growth of BiFeO3 thin films
DOI:10.1063/1.3460108  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:22  AU: Wu, Jiagang;Wang, John;
7:2:66:3     Effect of bottom electrodes on nanoscale switching characteristics and piezoelectric response in polycrystalline BiFeO3 thin films
DOI:10.1063/1.3651383  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Yan, F.;Zhu, T. J.;Lai, M. O.;Lu, L.;
7:2:66:4     Resistive hysteresis in BiFeO3 thin films
DOI:10.1016/j.materresbull.2011.07.030  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:11  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:66:5     Enhanced magnetic properties of chemical solution deposited BiFeO3 thin film with ZnO buffer layer
DOI:10.1016/j.mseb.2012.04.014  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:2  AU: Rajalakshmi, R.;Kambhala, Nagaiah;Angappane, S.;
7:2:66:6     Dependence of magnetic properties on the Fe2+ ion in Ba-doped BiFeO3 multiferroic films
DOI:10.1016/j.tsf.2012.01.036  JN:THIN SOLID FILMS  PY:2012
  TC:4  AU: Yu, Benfang;Li, Meiya;Wang, Jing;Hu, Zhongqiang;Liu, Xiaolian;Zhu, Yongdan;Zhao, Xingzhong;
7:2:66:7     Fabrication and electrical properties of LiNbO3/ZnO/n-Si heterojunction
DOI:10.1063/1.4800705  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Hao, Lanzhong;Li, Yanrong;Zhu, Jun;Wu, Zhipeng;Deng, Jie;Liu, Xingzhao;Zhang, Wanli;
7:2:66:8     Orientation dependence of resistive hysteresis in bismuth ferrite thin films
DOI:10.1016/j.jallcom.2013.03.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Wu, Jiagang;Wang, Xiaopeng;Zhang, Binyu;Zhu, Jianguo;Xiao, Dingquan;
7:2:66:9     Strain relaxation in Bi0.9Pb0.1FeO3/SrRuO3/SrTiO3 heterostructures
DOI:10.1063/1.3671791  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Bohra, Murtaza;Wu, C. P.;Yeh, H. J.;Chou, H.;
7:2:66:10     Influence of oxygen pressure on the ferroelectric properties of BiFeO3 thin films on LaNiO3/Si substrates via laser ablation
DOI:10.1007/s00339-010-5918-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:12  AU: Yan, F.;Zhu, T. J.;Lai, M. O.;Lu, L.;
7:2:66:11     BiFeO3/Zn1-xMnxO bilayered thin films
DOI:10.1016/j.apsusc.2011.09.083  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:3  AU: Wu, Jiagang;Wang, John;Xiao, Dingquan;Zhu, Jianguo;
7:2:67:1     Multiple Soft-Mode Vibrations of Lead Zirconate
DOI:10.1103/PhysRevLett.112.197601  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:7  AU: Hlinka, J.;Ostapchuk, T.;Buixaderas, E.;Kadlec, C.;Kuzel, P.;Gregora, I.;Kroupa, J.;Savinov, M.;Klic, A.;Drahokoupil, J.;Etxebarria, I.;Dec, J.;
7:2:67:2     Anomalous properties of antiferroelectric PbZrO3 under hydrostatic pressure
DOI:10.1103/PhysRevB.89.214111  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Prosandeev, S.;Xu, Changsong;Faye, R.;Duan, Wenhui;Liu, H.;Dkhil, B.;Janolin, P. -E.;Iniguez, Jorge;Bellaiche, L.;
7:2:67:3     Interplay of epitaxial strain and rotations in PbTiO3/PbZrO3 superlattices from first principles
DOI:10.1103/PhysRevB.84.205413  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Blok, Jeroen L.;Blank, Dave H. A.;Rijnders, Guus;Rabe, Karin M.;Vanderbilt, David;
7:2:67:4     Mode softening, precursor phenomena, and intermediate phases in PbZrO3
DOI:10.1103/PhysRevB.87.184110  JN:PHYSICAL REVIEW B  PY:2013
  TC:9  AU: Ko, Jae-Hyeon;Gorny, Michal;Majchrowski, Andrzej;Roleder, Krystian;Bussmann-Holder, Annette;
7:2:67:5     Surface polarization, rumpling, and domain ordering of strained ultrathin BaTiO3(001) films with in-plane and out-of-plane polarization
DOI:10.1103/PhysRevB.90.014107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Dionot, Jelle;Geneste, Gregory;Mathieu, Claire;Barrett, Nick;
7:2:67:6     Antiferroelectricity and ferroelectricity in epitaxially strained PbZrO3 from first principles
DOI:10.1103/PhysRevB.88.180102  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:2:67:7     Temperature dependence of Raman scattering and anharmonic properties in LiNbO3
DOI:10.1007/s00339-014-8485-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Kokanyan, Ninel;Chapron, David;Fontana, Marc D.;
7:2:67:8     Ferroelectric properties of BaZrO3/PbZrO3 and SrZrO3/PbZrO3 superlattices: An ab-initio study
DOI:10.1063/1.4893300  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Al-Aqtash, Nabil;Alsaad, Ahmad;Sabirianov, Renat;
7:2:67:9     Non-ergodicity and polar features of the transitional phase in lead zirconate
DOI:10.1063/1.4899139  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Faye, R.;Liu, H.;Kiat, J. -M.;Dkhil, B.;Janolin, P. -E.;
7:2:67:10     Mechanism of the abnormal thermal expansion of nearly stoichiometric LiNbO3
DOI:10.1016/j.jcrysgro.2010.10.052  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:3  AU: Yao, S. H.;Wang, J. Y.;Liu, H.;Yan, T.;Yu, D. H.;Chen, Y. F.;
7:2:68:1     High Response Piezoelectric and Piezoresistive Materials for Fast, Low Voltage Switching: Simulation and Theory of Transduction Physics at the Nanometer-Scale
DOI:10.1002/adma.201104617  JN:ADVANCED MATERIALS  PY:2012
  TC:12  AU: Newns, Dennis M.;Elmegreen, Bruce G.;Liu, Xiao-Hu;Martyna, Glenn J.;
7:2:68:2     A low-voltage high-speed electronic switch based on piezoelectric transduction
DOI:10.1063/1.4704391  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:21  AU: Newns, Dennis;Elmegreen, Bruce;Liu, Xiao Hu;Martyna, Glenn;
7:2:68:3     The piezoelectronic transistor: A nanoactuator-based post-CMOS digital switch with high speed and low power
DOI:10.1557/mrs.2012.267  JN:MRS BULLETIN  PY:2012
  TC:5  AU: Newns, D. M.;Elmegreen, B. G.;Liu, X-H;Martyna, G. J.;
7:2:68:4     Lateral scaling of Pb(Mg1/3Nb2/3)O-3-PbTiO3 thin films for piezoelectric logic applications
DOI:10.1063/1.4882025  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Keech, Ryan;Shetty, Smitha;Kuroda, Marcelo A.;Liu, Xiao Hu;Martyna, Glenn J.;Newns, Dennis M.;Trolier-McKinstry, Susan;
7:2:68:5     Giant Piezoresistive On/Off Ratios in Rare-Earth Chalcogenide Thin Films Enabling Nanomechanical Switching
DOI:10.1021/nl401710f  JN:NANO LETTERS  PY:2013
  TC:11  AU: Copel, M.;Kuroda, M. A.;Gordon, M. S.;Liu, X-H;Mahajan, S. S.;Martyna, G. J.;Moumen, N.;Armstrong, C.;Rossnagel, S. M.;Shaw, T. M.;Solomon, P. M.;Theis, T. N.;Yurkas, J. J.;Zhu, Y.;Newns, D. M.;
7:2:68:6     Pathway to the Piezoelectronic Transduction Logic Device
DOI:10.1021/nl5046796  JN:NANO LETTERS  PY:2015
  TC:2  AU: Solomon, P. M.;Bryce, B. A.;Kuroda, M. A.;Keech, R.;Shetty, S.;Shaw, T. M.;Copel, M.;Hung, L. -W.;Schrott, A. G.;Armstrong, C.;Gordon, M. S.;Reuter, K. B.;Theis, T. N.;Haensch, W.;Rossnagel, S. M.;Miyazoe, H.;Elmegreen, B. G.;Liu, X. -H.;Trolier-McKinstry, S.;Martyna, G. J.;Newns, D. M.;
7:2:68:7     Electrode size dependence of piezoelectric response of lead zirconate titanate thin films measured by double beam laser interferometry
DOI:10.1063/1.4821948  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Sivaramakrishnan, S.;Mardilovich, P.;Mason, A.;Roelofs, A.;Schmitz-Kempen, T.;Tiedke, S.;
7:2:68:8     Processing Optimization of Lead Magnesium Niobate-Lead Titanate Thin Films for Piezoelectric MEMS Application
DOI:10.1111/j.1551-2916.2011.05042.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Bastani, Yaser;Bassiri-Gharb, Nazanin;
7:2:68:9     Methods for determining piezoelectric properties of thin epitaxial films: Theoretical foundations
DOI:10.1063/1.4885058  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: McCartney, L. N.;Wright, L.;Cain, M. G.;Crain, J.;Martyna, G. J.;Newns, D. M.;
7:2:68:10     A Nanoscale Piezoelectric Transformer for Low-Voltage Transistors
DOI:10.1021/n1502578q  JN:NANO LETTERS  PY:2014
  TC:0  AU: Agarwal, Sapan;Yablonovitch, Eli;
7:2:68:11     Electron transport in nano-scaled piezoelectronic devices
DOI:10.1063/1.4804601  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Jiang, Zhengping;Kuroda, Marcelo A.;Tan, Yaohua;Newns, Dennis M.;Povolotskyi, Michael;Boykin, Timothy B.;Kubis, Tillmann;Klimeck, Gerhard;Martyna, Glenn J.;
7:2:69:1     Anomalous capacitance response induced by the superconducting gap in an Au/BiFeO3/La1.84Sr0.16CuO4/LaSrAlO4 heterostructure
DOI:10.1063/1.4824837  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Liu, F. G.;Xie, L.;Liu, W.;
7:2:69:2     Nature of magnetic domains in an exchange coupled BiFeO3/CoFe heterostructure
DOI:10.1063/1.4795794  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Qiu, D. Y.;Ashraf, K.;Salahuddin, S.;
7:2:69:3     Comment on "Anomalous capacitance response induced by the superconducting gap in an Au/BiFeO3/La1.84Sr0.16CuO4/LaSrAlO4 heterostructure" [Appl. Phys. Lett. 103, 153507 (2013)]
DOI:10.1063/1.4897990  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zhang, M. J.;Yin, Y. W.;Li, X. G.;
7:2:69:4     Superconducting gap induced barrier enhancement in a BiFeO3-based heterostructure
DOI:10.1063/1.3530446  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Lu, C. L.;Wang, Y.;You, L.;Zhou, X.;Peng, H. Y.;Xing, G. Z.;Chia, E. E. M.;Panagopoulos, C.;Chen, L.;Liu, J. -M.;Wang, J.;Wu, T.;
7:2:69:5     Heterojunction of Fe(Se1-xTex) superconductor on Nb-doped SrTiO3
DOI:10.1063/1.3370355  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Wu, C. T.;Chang, H. H.;Luo, J. Y.;Chen, T. J.;Hsu, F. C.;Chen, T. K.;Wang, M. J.;Wu, M. K.;
7:2:69:6     Response to "Comment on 'Anomalous capacitance response induced by the superconducting gap in an Au/BiFeO3/La1.84Sr0.16CuO4/LaSrAlO4 heterostructure'" [Appl. Phys. Lett. 105, 246103 (2014)]
DOI:10.1063/1.4897991  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Liu, F. G.;Xie, L.;Liu, W.;
7:2:69:7     A method for measuring exchange stiffness in ferromagnetic films
DOI:10.1063/1.3565203  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Girt, Erol;Huttema, W.;Mryasov, O. N.;Montoya, E.;Kardasz, B.;Eyrich, C.;Heinrich, B.;Dobin, A. Yu.;Karis, O.;
7:2:69:8     Effect of anti-ferromagnet surface moment density on the hysteresis properties of exchange coupled antiferromagnet-ferromagnet systems: The case of bismuth-ferrite
DOI:10.1063/1.4716034  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Ashraf, Khalid;Salahuddin, Sayeef;
7:2:69:9     Exchange stiffness in thin film Co alloys
DOI:10.1063/1.3679433  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Eyrich, C.;Huttema, W.;Arora, M.;Montoya, E.;Rashidi, F.;Burrowes, C.;Kardasz, B.;Girt, E.;Heinrich, B.;Mryasov, O. N.;From, M.;Karis, O.;
7:2:69:10     Transport properties in FeSe0.5Te0.5 nanobridges
DOI:10.1063/1.4809920  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Wu, C. H.;Chang, W. C.;Jeng, J. T.;Wang, M. J.;Li, Y. S.;Chang, H. H.;Wu, M. K.;
7:2:69:11     Fermi level shift in La2-xSrxCuO4 probed by heteroepitaxial junctions with Nb-doped SrTiO3
DOI:10.1063/1.4798252  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Li, B. -S.;Sawa, A.;Okamoto, H.;
7:2:69:12     Ferroelectric Polarization Effects in the Surface Superconductivity
DOI:10.1080/10584587.2012.731346  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Konsin, P.;Sorkin, B.;
7:2:70:1     Activated Solutions Enabling Low-Temperature Processing of Functional Ferroelectric Oxides for Flexible Electronics
DOI:10.1002/adma.201304308  JN:ADVANCED MATERIALS  PY:2014
  TC:8  AU: Bretos, Inigo;Jimenez, Ricardo;Wu, Aiying;Kingon, Angus I.;Vilarinho, Paula M.;Lourdes Calzada, M.;
7:2:70:2     A UV-absorber bismuth(III)-N-methyldiethanolamine complex as a low-temperature precursor for bismuth-based oxide thin films
DOI:10.1039/c4tc00960f  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:0  AU: Perez-Mezcua, Dulce;Sirera, Rafael;Jimenez, Ricardo;Bretos, Inigo;De Dobbelaere, Christopher;Hardy, An;Van Bael, Marlies K.;Lourdes Calzada, M.;
7:2:70:3     A low-temperature crystallization path for device-quality ferroelectric films
DOI:10.1063/1.3486462  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Li, Jinwang;Kameda, Hiroyuki;Trinh, Bui Nguyen Quoc;Miyasako, Takaaki;Tue, Phan Trong;Tokumitsu, Eisuke;Mitani, Tadaoki;Shimoda, Tatsuya;
7:2:70:4     A simple, low-cost CVD route to thin films of BiFeO3 for efficient water photo-oxidation
DOI:10.1039/c3ta14824f  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:9  AU: Moniz, Savio J. A.;Quesada-Cabrera, Raul;Blackman, Christopher S.;Tang, Junwang;Southern, Paul;Weaver, Paul M.;Carmalt, Claire J.;
7:2:70:5     Solution Synthesis of BiFeO3 Thin Films onto Silicon Substrates with Ferroelectric, Magnetic, and Optical Functionalities
DOI:10.1111/jace.12569  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Gutierrez-Lazaro, Carmen;Bretos, Inigo;Jimenez, Ricardo;Ricote, Jesus;El Hosiny, Hitham;Perez-Mezcua, Dulce;Jimenez Rioboo, Rafael J.;Garcia-Hernandez, Mar;Calzada, Maria L.;
7:2:70:6     Polarization behavior of poly(vinylidene fluoride-trifluoroethylene) copolymer ferroelectric thin film capacitors for nonvolatile memory application in flexible electronics
DOI:10.1063/1.3500428  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:14  AU: Mao, D.;Mejia, I.;Stiegler, H.;Gnade, B. E.;Quevedo-Lopez, M. A.;
7:2:70:7     Photoactivation of Sol-Gel Precursors for the Low-Temperature Preparation of PbTiO3 Ferroelectric Thin Films
DOI:10.1111/j.1551-2916.2010.04095.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Martin-Arbella, Nekane;Bretos, Inigo;Jimenez, Ricardo;Calzada, Maria L.;Sirera, Rafael;
7:2:70:8     Crystallization of lead zirconate titanate without passing through pyrochlore by new solution process
DOI:10.1016/j.jeurceramsoc.2012.01.022  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Kameda, Hiroyuki;Li, Jinwang;Chi, Dam Hieu;Sugiyama, Ayumi;Higashimine, Koichi;Uruga, Tomoya;Tanida, Hajime;Kato, Kazuo;Kaneda, Toshihiko;Miyasako, Takaaki;Tokumitsu, Eisuke;Mitani, Tadaoki;Shimoda, Tatsuya;
7:2:70:9     Metal complexes with N-methyldiethanolamine as new photosensitive precursors for the low-temperature preparation of ferroelectric thin films
DOI:10.1039/c1jm10846h  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:5  AU: Martin-Arbella, N.;Bretos, I.;Jimenez, R.;Calzada, M. L.;Sirera, R.;
7:2:70:10     Aqueous Solutions for Low-Temperature Photoannealing of Functional Oxide Films: Reaching the 400 degrees C Si-Technology Integration Barrier
DOI:10.1021/ja203553n  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:5  AU: De Dobbelaere, Christopher;Lourdes Calzada, Maria;Jimenez, Ricardo;Ricote, Jesus;Bretos, Inigo;Mullens, Jules;Hardy, An;Van Bael, Marlies K.;
7:2:70:11     Use of the solvent chemistry for the control of the critical thickness of PbTiO3 ultrathin films
DOI:10.1557/JMR.2010.0127  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:3  AU: Fernandez, Roberto;Holgado, Susana;Huang, Zhaorong;Calzada, Maria L.;Ricote, Jesus;
7:2:71:1     Bulk interface engineering for enhanced magnetization in multiferroic BiFeO3 compounds
DOI:10.1063/1.4793485  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Pillai, Shreeja;Bhuwal, Deepika;Banerjee, Alok;Shelke, Vilas;
7:2:71:2     Role of Pb(Zr0.52Ti0.48)O-3 substitution in multiferroic properties of polycrystalline BiFeO3 thin films
DOI:10.1063/1.3668123  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Yan, F.;Zhu, T. J.;Lai, M. O.;Lu, L.;
7:2:71:3     Weak ferromagnetism in La-doped BiFeO3 multiferroic thin films
DOI:10.1063/1.4730896  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Lazenka, V. V.;Ravinski, A. F.;Makoed, I. I.;Vanacken, J.;Zhang, G.;Moshchalkov, V. V.;
7:2:71:4     Effect of nonmagnetic alkaline-earth dopants on magnetic properties of BiFeO3 thin films
DOI:10.1063/1.3622564  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Li, Pai;Lin, Yuan-Hua;Nan, Ce-Wen;
7:2:71:5     Giant room-temperature magnetodielectric coupling in spark plasma sintered brownmillerite ceramics
DOI:10.1063/1.4903479  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wu, J. W.;Wang, J.;Liu, G.;Wu, Y. J.;Liu, X. Q.;Chen, X. M.;
7:2:71:6     Structural, Raman, and Dielectric Studies on Multiferroic Mn-doped Bi1-xLaxFeO3 Ceramics
DOI:10.1111/jace.12942  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Xing, Zhibiao;Zhu, Xinhua;Zhu, Jianmin;Liu, Zhiguo;Al-Kassab, Talaat;
7:2:71:7     Magnetic-field-induced spin flop transition and magnetoelectric effect in Ca2Fe2-xAlxO5
DOI:10.1103/PhysRevB.89.054437  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Abe, N.;Khanh, N. D.;Sasaki, T.;Arima, T.;
7:2:71:8     Improved multiferroic properties in Sm-doped BiFeO3 thin films deposited using chemical solution deposition method
DOI:10.1063/1.4714650  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Singh, S. K.;Tomy, C. V.;Era, T.;Itoh, M.;Ishiwara, H.;
7:2:71:9     Magnetodielectric coupling in epitaxial Nd2CoMnO6 thin films with double perovskite structure
DOI:10.1063/1.4866053  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Anshul, Avneesh;Kotnala, R. K.;Aloysius, R. P.;Gupta, Anurag;Basheed, G. A.;
7:2:72:1     Raman spectra and dielectric function of BiCrO3: Experimental and first-principles studies
DOI:10.1063/1.3642985  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Himcinschi, Cameliu;Vrejoiu, Ionela;Weissbach, Torsten;Vijayanandhini, Kannan;Talkenberger, Andreas;Roeder, Christian;Bahmann, Silvia;Zahn, Dietrich R. T.;Belik, Alexei A.;Rafaja, David;Kortus, Jens;
7:2:72:2     Strain dependent microstructural modifications of BiCrO3 epitaxial thin films
DOI:10.1016/j.tsf.2013.07.053  JN:THIN SOLID FILMS  PY:2013
  TC:4  AU: Kannan, Vijayanandhini;Arredondo, Miryam;Johann, Florian;Hesse, Dietrich;Labrugere, Christine;Maglione, Mario;Vrejoiu, Ionela;
7:2:72:3     Microstructure of epitaxial strained BiCrO3 thin films
DOI:10.1063/1.3435486  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: David, A.;Boullay, Ph.;Mangalam, R. V. K.;Barrier, N.;Prellier, W.;
7:2:72:4     Constrained ferroelectric domain orientation in (BiFeO3)(m)(SrTiO3)(n) superlattice
DOI:10.1063/1.3275726  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Ranjith, R.;Mangalam, R. V. K.;Boullay, Ph.;David, A.;Lepetit, M. B.;Lueders, U.;Prellier, W.;Da Costa, A.;Ferri, A.;Desfeux, R.;Vincze, Gy.;Radi, Zs.;Aruta, C.;
7:2:72:5     Enhanced electrical and ferroelectric properties in a multiferroic (BiFeO3/Bi0.5Na0.5TiO3)(3)/LaNiO3 superlattices structure
DOI:10.1007/s00339-013-8184-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Cheng, X. Q.;Miao, J.;Wu, S. Z.;Shao, F.;Guo, L. Q.;Xu, X. G.;Jiang, Y.;
7:2:72:6     Growth of BiFeO3/SrTiO3 artificial superlattice structure by RF sputtering
DOI:10.1016/j.jcrysgro.2011.08.019  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:8  AU: Chiu, Shang-Jui;Liu, Yen-Ting;Lee, Hsin-Yi;Yu, Ge-Ping;Huang, Jia-Hong;
7:2:72:7     Raman spectroscopic and X-ray diffraction investigations of epitaxial BiCrO3 thin films
DOI:10.1016/j.tsf.2011.10.196  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Talkenberger, Andreas;Himcinschi, Cameliu;Weissbach, Torsten;Vijayanandhini, Kannan;Vrejoiu, Ionela;Roeder, Christian;Rafaja, David;Kortus, Jens;
7:2:72:8     The structure and ferroelectric property of La-doped BiFeO3/SrTiO3 artificial superlattice structure by rf sputtering: Effect of deposition temperature
DOI:10.1016/j.tsf.2012.02.033  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Chiu, Shang-Jui;Liu, Yen-Ting;Yu, Ge-Ping;Lee, Hsin-Yi;Huang, Jia-Hong;
7:2:72:9     Photovoltaic Properties of Multiferroic BiFeO3/BiCrO3 Heterostructures
DOI:10.1111/jace.12837  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Chakrabartty, Joyprokash;Nechache, Riad;Li, Shun;Nicklaus, Mischa;Ruediger, Andreaus;Rosei, Federico;
7:2:72:10     Density functional study of weak ferromagnetism in a thick BiCrO3 film
DOI:10.1063/1.3583649  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Ding, Jun;Yao, Yugui;Kleinman, Leonard;
7:2:72:11     Strain enhanced ferroelectric properties of multiferroic BiFeO3/SrTiO3 superlattice structure prepared by radio frequency magnetron sputtering
DOI:10.1016/j.tsf.2013.05.004  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Chiu, Shang-Jui;Liu, Yen-Ting;Lee, Hsin-Yi;Yu, Ge-Ping;Huang, Jia-Hong;
7:2:73:1     Magnetically separable BiFeO3 nanoparticles with a gamma-Fe2O3 parasitic phase: controlled fabrication and enhanced visible-light photocatalytic activity
DOI:10.1039/c1jm13072b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:23  AU: Guo, Renqing;Fang, Liang;Dong, Wen;Zheng, Fengang;Shen, Mingrong;
7:2:73:2     Nonlinear optical and magnetic properties of BiFeO3 harmonic nanoparticles
DOI:10.1063/1.4895836  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Schwung, Sebastian;Rogov, Andrii;Clarke, Gareth;Joulaud, Cecile;Magouroux, Thibaud;Staedler, Davide;Passemard, Solene;Juestel, Thomas;Badie, Laurent;Galez, Christine;Wolf, Jean Pierre;Volkov, Yuri;Prina-Mello, Adriele;Gerber-Lemaire, Sandrine;Rytz, Daniel;Mugnier, Yannick;Bonacina, Luigi;Le Dantec, Ronan;
7:2:73:3     Visible light responsive Bi7Fe3Ti3O21 nanoshelf photocatalysts with ferroelectricity and ferromagnetism
DOI:10.1039/c4ta01799d  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:5  AU: Li, Xiaoning;Ju, Zheng;Li, Feng;Huang, Yan;Xie, Yueming;Fu, Zhengping;Knize, R. J.;Lu, Yalin;
7:2:73:4     Spontaneous polarization in ultrasmall lithium niobate nanocrystals revealed by second harmonic generation
DOI:10.1103/PhysRevB.86.195428  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Knabe, Bastian;Buse, Karsten;Assenmacher, Wilfried;Mader, Werner;
7:2:73:5     Preparation of BiFeO3-Graphene Nanocomposites and Their Enhanced Photocatalytic Activities
DOI:10.1155/2013/642897  JN:JOURNAL OF NANOMATERIALS  PY:2013
  TC:1  AU: Dai, J. F.;Xian, T.;Di, L. J.;Yang, H.;
7:2:73:6     Low-temperature hydrothermal synthesis of BiFeO3 microcrystals and their visible-light photocatalytic activity
DOI:10.1016/j.materresbull.2012.06.068  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:11  AU: Wei, Jie;Zhang, Chao;Xu, Zhuo;
7:2:73:7     Orientation of colloidally suspended LiNbO3 nanocrystals in externally applied electric fields
DOI:10.1063/1.3526372  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Schuetze, D.;Knabe, B.;Ackermann, M.;Buse, K.;
7:2:73:8     Surface chemical and photocatalytic consequences of Ca-doping of BiFeO3 as probed by XPS and H2O2 decomposition studies
DOI:10.1016/j.apsusc.2014.09.007  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:4  AU: Zaki, Mohamed I.;Ramadan, Wegdan;Katrib, Ali;Rabee, Abdallah I. M.;
7:2:73:9     Synthesis of Bismuth Ferrite Nanoparticles via a Wet Chemical Route at Low Temperature
DOI:10.1155/2011/797639  JN:JOURNAL OF NANOMATERIALS  PY:2011
  TC:10  AU: Hu, Yongming;Fei, Linfeng;Zhang, Yiling;Yuan, Jikang;Wang, Yu;Gu, Haoshuang;
7:2:73:10     Highly efficient photocatalysis by BiFeO3/alpha(gamma)-Fe2O3 ferromagnetic nano p/n junctions formed by dopant-induced phase separation
DOI:10.1007/s11051-013-1848-2  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:4  AU: Ramadan, Wegdan;Shaikh, Parvez A.;Ebrahim, Sh.;Ramadan, Abdallah;Hannoyer, Beatrice;Jouen, Samuel;Sauvage, Xavier;Ogale, Satishchandra;
7:2:74:1     Structural, Electronic, and Lattice Dynamics of PbTiO3, SnTiO3, and SnZrO3: A Comparative First-Principles Study
DOI:10.1080/10584587.2013.780528  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:6  AU: Taib, M. F. M.;Yaakob, M. K.;Hassan, O. H.;Yahya, M. Z. A.;
7:2:74:2     First principles calculation on structural and lattice dynamic of SnTiO3 and SnZrO3
DOI:10.1016/j.ceramint.2012.10.081  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Taib, M. F. M.;Yaakob, M. K.;Hassan, O. H.;Chandra, Amreesh;Arof, A. K.;Yahya, M. Z. A.;
7:2:74:3     Theory of prospective perovskite ferroelectrics with double rocksalt order
DOI:10.1103/PhysRevB.83.134116  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Roy, Anindya;Vanderbilt, David;
7:2:74:4     Influences of Epitaxial Strain and Volume on BaTiO3: Ab Initio Total Energy Calculation
DOI:10.1080/10584587.2014.905350  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Mansor, F. D.;Yaakob, M. K.;Taib, M. F. M.;Kudin, T. I. T.;Hassan, O. H.;Yahya, M. Z. A.;
7:2:74:5     First principle study on structural, elastic and electronic properties of cubic BiFeO3
DOI:10.1016/j.ceramint.2012.10.078  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Yaakob, M. K.;Taib, M. F. M.;Deni, M. S. M.;Chandra, Amreesh;Lu, L.;Yahya, M. Z. A.;
7:2:74:6     Determination of Electronic Structure and Band Gap of Li2MnP2O7 via First-Principle Study
DOI:10.1080/10584587.2014.905160  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:1  AU: Rasiman, M. S. A.;Badrudin, F. W.;Kudin, T. I. T.;Yaakob, M. K.;Taib, M. F. M.;Yahya, M. Z. A.;Hassan, O. H.;
7:2:74:7     First Principles LDA plus U Calculations for ZnO Materials
DOI:10.1080/10584587.2014.905086  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Yaakob, M. K.;Hussin, N. H.;Taib, M. F. M.;Kudin, T. I. T.;Hassan, O. H.;Ali, A. M. M.;Yahya, M. Z. A.;
7:2:74:8     First-Principles Comparative Study of the Electronic and Optical Properties of Tetragonal (P4mm) ATiO(3) (A = Pb,Sn,Ge)
DOI:10.1080/10584587.2014.905105  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Taib, M. F. M.;Yaakob, M. K.;Badrudin, F. W.;Rasiman, M. S. A.;Kudin, T. I. T.;Hassan, O. H.;Yahya, M. Z. A.;
7:2:74:9     First-Principles Calculation of the Structural, Elastic, Electronic and Lattice Dynamics of GeTiO3
DOI:10.1080/00150193.2013.841525  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Taib, M. F. M.;Yaakob, M. K.;Badrudin, F. W.;Kudin, T. I. T.;Hassan, O. H.;Yahya, M. Z. A.;
7:2:74:10     First Principles Calculation of Tetragonal (P4 mm) Pb-free Ferroelectric Oxide of SnTiO3
DOI:10.1080/00150193.2013.849178  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Taib, M. F. M.;Yaakob, M. K.;Badrudin, F. W.;Kudin, T. I. T.;Hassan, O. H.;Yahya, M. Z. A.;
7:2:74:11     Ab Initio Studies on the Structural and Electronic Properties of Bismuth Ferrite Based on Ferroelectric Hexagonal Phase and Paraelectric Orthorhombic Phase
DOI:10.1080/10584587.2014.905306  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:1  AU: Yaakob, M. K.;Taib, M. F. M.;Deni, M. S. M.;Yahya, M. Z. A.;
7:2:75:1     Effect of space charge on the polarization hysteresis characteristics of monolithic and compositionally graded ferroelectrics
DOI:10.1016/j.actamat.2009.08.055  JN:ACTA MATERIALIA  PY:2010
  TC:26  AU: Okatan, M. B.;Mantese, J. V.;Alpay, S. P.;
7:2:75:2     Asymmetric hysteresis loops and smearing of the dielectric anomaly at the transition temperature due to space charges in ferroelectric thin films
DOI:10.1063/1.3457348  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:17  AU: Misirlioglu, I. B.;Okatan, M. B.;Alpay, S. P.;
7:2:75:3     Thickness driven stabilization of saw-tooth-like domains upon phase transitions in ferroelectric thin films with depletion charges
DOI:10.1063/1.3691938  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Misirlioglu, I. B.;Cologlu, H. N.;Yildiz, M.;
7:2:75:4     Spinodal single-domain -> polydomain transition and P-E hysteresis in thin ferroelectric films
DOI:10.1016/j.actamat.2009.10.016  JN:ACTA MATERIALIA  PY:2010
  TC:5  AU: Artemev, A.;Roytburd, A.;
7:2:75:5     Effect of Asymmetrical Interface Charges on the Hysteresis and Domain Configurations of Ferroelectric Thin Films
DOI:10.1080/10584587.2011.575017  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Misirlioglu, I. B.;Okatan, M. B.;Alpay, S. P.;
7:2:75:6     Improved dielectric and electrical insulating properties in Pb(Mg1/3Nb2/3)(0.62)Ti0.38O3 based multilayer ferroelectric thin films
DOI:10.1016/j.tsf.2012.08.049  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Zhou, Dan;Tang, Yanxue;Wang, Feifei;Xie, Dongzhu;Sun, Dazhi;Shi, Wangzhou;Tian, Li;Sun, Jinglan;Meng, Xiangjian;Chu, Junhao;Kong, Weijin;Luo, Laihui;
7:2:75:7     Hysteretic electrical transport in BaTiO3/Ba1-xSrxTiO3/Ge heterostructures
DOI:10.1063/1.4864648  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Ngai, J. H.;Kumah, D. P.;Ahn, C. H.;Walker, F. J.;
7:2:75:8     Domain Structure and P(E) Hysteresis in m BaxSr(1-x)TiO3 - n BaTiO3 Bilayers on SrTiO3 Substrate
DOI:10.1080/10584587.2011.575016  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:0  AU: Artemev, A.;Roytburd, A. L.;
7:2:75:9     Twisted ferroelectric liquid crystals dynamic behaviour modification under electric field: A Mueller matrix polarimetry approach using birefringence
DOI:10.1063/1.4862162  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Babilotte, P.;Nunes Henrique Silva, V.;Sathaye, K.;Dubreuil, M.;Rivet, S.;Dupont, L.;de la Tocnaye, J. L. de Bougrenet;Le Jeune, B.;
7:2:76:1     Structural and electronic properties of oxygen vacancy in lead-free KTa1-xNbxO3: Comparative first-principles calculations
DOI:10.1016/j.commatsci.2012.07.024  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:2  AU: Shen, Yanqing;Zhou, Zhongxiang;
7:2:76:2     Theory of Giant Electromechanical Response from Ferroelectric Bilayers with Polydomain Structures due to Interlayer and Interdomain Coupling
DOI:10.1103/PhysRevLett.105.197601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:9  AU: Mahjoub, R.;Alpay, S. P.;Nagarajan, V.;
7:2:76:3     Trapping of oxygen vacancy at grain boundary and its correlation with local atomic configuration and resultant excess energy in barium titanate: A systematic computational analysis
DOI:10.1103/PhysRevB.82.134107  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Oyama, Takashi;Wada, Nobuyuki;Takagi, Hiroshi;Yoshiya, Masato;
7:2:76:4     Defects and transport processes in beryllium
DOI:10.1016/j.actamat.2011.07.064  JN:ACTA MATERIALIA  PY:2011
  TC:13  AU: Middleburgh, S. C.;Grimes, R. W.;
7:2:76:5     Voltage bias induced modification of the transport property of all oxide Pr0.5Ca0.5MnO3/SrTi0.95Nb0.05O3 junctions
DOI:10.1063/1.3580507  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Ghosh, Barnali;Das, K.;Raychaudhuri, A. K.;
7:2:76:6     Oxygen atoms and molecules at La1-xSrxMnO3 surfaces
DOI:10.1103/PhysRevB.81.045433  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Harrison, Walter A.;
7:2:76:7     Phase field simulations of ferroelectrics domain structures in PbZrxTi1-xO3 bilayers
DOI:10.1016/j.actamat.2013.01.038  JN:ACTA MATERIALIA  PY:2013
  TC:4  AU: Xue, F.;Wang, J. J.;Sheng, G.;Huang, Esther;Cao, Y.;Huang, H. H.;Munroe, Paul;Mahjoub, R.;Li, Y. L.;Nagarajan, Valanoor;Chen, L. Q.;
7:2:76:8     Comment on "Theory of Giant Electromechanical Response from Ferroelectric Bilayers with Polydomain Structures due to Interlayer and Interdomain Coupling''
DOI:10.1103/PhysRevLett.107.139701  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:1  AU: Pertsev, N. A.;
7:2:76:9     Comment on "Theory of Giant Electromechanical Response from Ferroelectric Bilayers with Polydomain Structures due to Interlayer and Interdomain Coupling'' Reply
DOI:10.1103/PhysRevLett.107.139702  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:0  AU: Mahjoub, R.;Alpay, S. P.;Nagarajan, V.;
7:2:76:10     Room temperature resistive state switching with hysteresis in GdMnO3 thin film with low threshold voltage
DOI:10.1063/1.4876131  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Nath, Rajib;Raychaudhuri, A. K.;Mukovskii, Ya. M.;Andreev, N.;Chichkov, Vladimir;
7:2:76:11     Interactions of extrinsic interstitial atoms (H, He, O, C) with vacancies in beryllium from first-principles
DOI:10.1016/j.commatsci.2014.04.028  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:1  AU: Zhang, Pengbo;Zhao, Jijun;
7:2:77:1     The Size-Dependent Ferroelectric Phase Transition in BaTiO3 Nanocrystals Probed by Surface Plasmons
DOI:10.1021/nn102385e  JN:ACS NANO  PY:2011
  TC:21  AU: Szwarcman, Daniel;Vestler, Daniel;Markovich, Gil;
7:2:77:2     Probing Local Dipoles and Ligand Structure in BaTiO3 Nanoparticles
DOI:10.1021/cm100440p  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:40  AU: Page, Katharine;Proffen, Thomas;Niederberger, Markus;Seshadri, Ram;
7:2:77:3     Ferroelectric domains and diffuse transitions in ultrathin films of PbTiO3: Effects of strain and electrodes
DOI:10.1103/PhysRevB.88.064102  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kouser, Summayya;Nishimatsu, Takeshi;Waghmare, Umesh V.;
7:2:77:4     A modified Landau-Devonshire thermodynamic potential for strontium titanate
DOI:10.1063/1.3442915  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Sheng, G.;Li, Y. L.;Zhang, J. X.;Choudhury, S.;Jia, Q. X.;Gopalan, V.;Schlom, D. G.;Liu, Z. K.;Chen, L. Q.;
7:2:77:5     Phase transitions and domain stabilities in biaxially strained (001) SrTiO3 epitaxial thin films
DOI:10.1063/1.3488636  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Sheng, G.;Li, Y. L.;Zhang, J. X.;Choudhury, S.;Jia, Q. X.;Gopalan, V.;Schlom, D. G.;Liu, Z. K.;Chen, L. Q.;
7:2:77:6     Diffuse phase transitions in ferroelectric ultrathin films from first principles
DOI:10.1103/PhysRevB.81.094119  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Bin-Omran, S.;Kornev, I.;Ponomareva, I.;Bellaiche, L.;
7:2:77:7     Size dependent transition enthalpy in PbTiO3 nanoparticles due to a cubic surface layer
DOI:10.1007/s00339-012-7274-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:1  AU: Ma, Wenhui;
7:2:77:8     Correlation between interfacial defects and ferromagnetism of BaTiO3 nanocrystals studied by positron annihilation
DOI:10.1016/j.apsusc.2011.07.132  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:4  AU: Chen, Zhi-Yuan;Chen, Z. Q.;Wang, D. D.;Wang, S. J.;
7:2:77:9     Study of 90 degrees and 180 degrees Nanodomains in BaTiO3 Nanoparticles Using Transmission Electron Microscopy
DOI:10.1080/00150193.2014.964095  JN:FERROELECTRICS  PY:2014
  TC:3  AU: Dudhe, C. M.;Nagdeote, S. B.;Khambadkar, S. J.;Arjunwadkar, P. R.;Patil, R. R.;
7:2:77:10     Surface and finite size effect on fluctuations dynamics in nanoparticles with long-range order
DOI:10.1063/1.3291126  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Morozovska, A. N.;Eliseev, E. A.;
7:2:78:1     Modeling the switching kinetics in ferroelectrics
DOI:10.1063/1.3660680  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Kliem, Herbert;Kuehn, Markus;
7:2:78:2     The Weiss Field Revisited
DOI:10.1080/00150193.2010.505465  JN:FERROELECTRICS  PY:2010
  TC:13  AU: Kliem, H.;Kuehn, M.;Martin, B.;
7:2:78:3     Ferroelectric switching in Langmuir-Blodgett and spin-coated thin films of poly(vinylidene fluoride/trifluoroethylene) copolymers
DOI:10.1063/1.3636397  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Mai, Manfang;Martin, Bjoern;Kliem, Herbert;
7:2:78:4     Polarization relaxation and charge injection in thin films of poly(vinylidene fluoride/trifluoroethylene) copolymer
DOI:10.1063/1.4817508  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Mai, Manfang;Martin, Bjoern;Kliem, Herbert;
7:2:78:5     A model for the double loop of ferroelectric polarization close to T-C
DOI:10.1063/1.4795113  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Kliem, Herbert;Leschhorn, Andreas;Edtbauer, Tobias;
7:2:78:6     Microscopic model of domain wall motion
DOI:10.1063/1.4868901  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Leschhorn, Andreas;Djoumbou, Stephane;Kliem, Herbert;
7:2:78:7     Strain Induced Change from Second Order to First Order Ferroelectric Phase Transition
DOI:10.1080/00150193.2011.634747  JN:FERROELECTRICS  PY:2011
  TC:7  AU: Kliem, H.;
7:2:78:8     Simulation of effective dielectric permittivities: Comparison of different crystal structures, amorphous systems, and nanocomposites
DOI:10.1063/1.3633768  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Leschhorn, A.;Kliem, H.;
7:2:78:9     Observation of thermal Barkhausen effect in ferroelectric films of poly(vinylidene fluoride/trifluoroethylene) copolymer
DOI:10.1063/1.4845395  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Mai, Manfang;Kliem, Herbert;
7:2:78:10     Influence of the piezoeffect on static and dynamic ferroelectric properties
DOI:10.1063/1.4820574  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Leschhorn, Andreas;Kliem, Herbert;
7:2:78:11     Nonlinear dielectric response and transient current: An effective potential for ferroelectric domain wall displacement
DOI:10.1063/1.4820589  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Jimenez, Rolando Placeres;Rino, Jose Pedro;Goncalves, Andre Marino;Eiras, Jose Antonio;
7:2:78:12     Phase Transitions in the Modified Weiss Model
DOI:10.1080/00150193.2010.505466  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Kuehn, M.;Kliem, H.;
7:2:78:13     Modeling of Ferroelectric-Dielectric Nanocomposites
DOI:10.1080/00150193.2010.484716  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Nechaev, V. N.;Shuba, A. V.;
7:2:78:14     Interacting and noninteracting dipole systems in ferroelectric poly(vinylidene fluoride-trifluoroethylene) copolymer
DOI:10.1063/1.3499614  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Martin, Bjoern;Kuehn, Markus;Kliem, Herbert;
7:2:79:1     Goldstone-like States in a Layered Perovskite with Frustrated Polarization: A First-Principles Investigation of PbSr2Ti2O7
DOI:10.1103/PhysRevLett.104.097601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:15  AU: Nakhmanson, S. M.;Naumov, Ivan;
7:2:79:2     Strain induced vortex-to-uniform polarization transitions in soft-ferroelectric nanoparticles
DOI:10.1063/1.4887068  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Lee, Byounghak;Nakhmanson, Serge M.;Heinonen, Olle;
7:2:79:3     First-principles study of competing ferroelectric and antiferroelectric instabilities in BaTiO3/BaO superlattices
DOI:10.1103/PhysRevB.82.045426  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Bousquet, Eric;Junquera, Javier;Ghosez, Philippe;
7:2:79:4     Influence of dielectric stiffness, interface, and layer thickness on hysteresis loops of ferroelectric superlattices
DOI:10.1063/1.3630016  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Chew, K. -H.;Ong, L. -H.;Iwata, M.;
7:2:79:5     Structural and electronic properties of PbTiO3/SrTiO3 superlattices from first principles
DOI:10.1103/PhysRevB.82.134102  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Gu, Mingqiang;Wang, Jianli;Xie, Q. Y.;Wu, X. S.;
7:2:79:6     Chemical control of polar behavior in bicomponent short-period superlattices
DOI:10.1103/PhysRevB.81.235112  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Das, Hena;Spaldin, Nicola A.;Waghmare, Umesh V.;Saha-Dasgupta, T.;
7:2:79:7     Piezoelectrics by design: A route through short-period Perovskite superlattices
DOI:10.1063/1.3561843  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Das, Hena;Waghmare, Umesh V.;Saha-Dasgupta, Tanusri;
7:2:79:8     The Behavior of Ferroelectric Instability in the Perovskite SrTiO3 With Doping Trivalent Ions Sc3+, In3+, La3+, Bi3+
DOI:10.1080/00150193.2011.577315  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Zamkova, N. G.;Zinenko, V. I.;
7:2:79:9     Lattice Vibrations in Finite Discrete Systems with Symmetric and Asymmetric Boundary Conditions
DOI:10.1080/00150193.2012.678099  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Iwata, Makoto;Ishibashi, Yoshihiro;
7:2:80:1     Combined effects of Bi deficiency and Mn substitution on the structural transformation and functionality of BiFeO3 films
DOI:10.1063/1.4901323  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Chen, Jingyi;Wang, Yao;Deng, Yuan;
7:2:80:2     Improving the optical absorption of BiFeO3 for photovoltaic applications via uniaxial compression or biaxial tension
DOI:10.1063/1.4793397  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Dong, Huafeng;Wu, Zhigang;Wang, Shanying;Duan, Wenhui;Li, Jingbo;
7:2:80:3     Double polarization hysteresis loop induced by the domain pinning by defect dipoles in HoMnO3 epitaxial thin films
DOI:10.1103/PhysRevB.81.012101  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Lee, D.;Kim, H. S.;Jang, S. Y.;Joh, K. W.;Noh, T. W.;Yu, J.;Lee, C. E.;Yoon, J. -G.;
7:2:80:4     Magnetoelectric properties of particulate and bi-layer PMN-PT/CoFe2O4 composites
DOI:10.1016/j.jmmm.2011.08.056  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:7  AU: Mathe, V. L.;Sheikh, A. D.;Srinivasan, G.;
7:2:80:5     Photo-magnetic assisted ferroelectric polarization in magneto-electric BiFeO3/BaTiO3 thin film
DOI:10.1016/j.jmmm.2013.12.014  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Khalkhali, S. M. H.;Tehranchi, M. M.;Hamidi, S. M.;
7:2:80:6     Piezoresponse force microscopy and vibrating sample magnetometer study of single phased Mn induced multiferroic BiFeO3 thin film
DOI:10.1063/1.3699021  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Gupta, Surbhi;Sharma, Anjali;Tomar, Monika;Gupta, Vinay;Pal, Madhuparna;Guo, Ruyan;Bhalla, Amar;
7:2:80:7     Microstructure-property relationship in magnetoelectric bulk composites
DOI:10.1016/j.jmmm.2010.10.038  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:6  AU: Sheikh, Arif D.;Fawzi, Abdulsamee;Mathe, V. L.;
7:2:80:8     Spin exchange interactions in hexagonal manganites RMnO3 (R = Tb, Dy, Ho, Er) epitaxial thin films
DOI:10.1063/1.3622768  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Chen, Xiang-Bai;Nguyen Thi Minh Hien;Lee, D.;Jang, S. -Y.;Noh, T. W.;Yang, In-Sang;
7:2:81:1     Electrical transport and resistance switching characteristics of BiFeO3/Nb:SrTiO3/GaAs heterostructure fabricated by pulsed laser deposition
DOI:10.1063/1.4890115  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Huang, W.;Yang, J. J.;Gao, G. Y.;Lei, Y.;Zhu, J.;Zeng, H. Z.;Zheng, F. G.;Hao, J. H.;
7:2:81:2     Heteroepitaxial growth and multiferroic properties of Mn-doped BiFeO3 films on SrTiO3 buffered III-V semiconductor GaAs
DOI:10.1063/1.4820579  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Gao, G. Y.;Yang, Z. B.;Huang, W.;Zeng, H. Z.;Wang, Y.;Chan, H. L. W.;Wu, W. B.;Hao, J. H.;
7:2:81:3     Interfacial and rectifying characteristic of epitaxial SrTiO3-delta/GaAs p-n junctions
DOI:10.1016/j.scriptamat.2011.04.035  JN:SCRIPTA MATERIALIA  PY:2011
  TC:8  AU: Wei, X. H.;Huang, W.;Yang, Z. B.;Hao, J. H.;
7:2:81:4     Structural and resistance switching properties of ZnO/SrTiO3/GaAs heterostructure grown by laser molecular beam epitaxy
DOI:10.1063/1.3505136  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Huang, W.;Dai, J. Y.;Hao, J. H.;
7:2:81:5     Influence of target composition and deposition temperature on the domain structure of BiFeO3 thin films
DOI:10.1063/1.4757938  JN:AIP ADVANCES  PY:2012
  TC:2  AU: Guo, Rui;You, Lu;Motapothula, M.;Zhang, Zhen;Breese, M. B. H.;Chen, Lang;Wu, Di;Wang, Junling;
7:2:81:6     Mechanical Polishing Effects Toward Surface Domain Evolution in Pb(Zn1/3Nb2/3)O-3-PbTiO3 Single Crystals
DOI:10.1111/j.1551-2916.2010.04204.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Wong, Meng Fei;Zeng, Kaiyang;
7:2:81:7     Effects of SrTiO(3)/TiO(2) buffer layer on structural and electrical properties of BiFeO(3) thin films grown on GaN (0002)
DOI:10.1063/1.3585836  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Luo, W. B.;Zhu, J.;Zeng, H. Z.;Liao, X. W.;Chen, H.;Zhang, W. L.;Li, Y. R.;
7:2:81:8     Anomalous electrical transport characteristics of orthorhombic HoMnO3/Nb-doped SrTiO3 epitaxial heterojunctions
DOI:10.1063/1.3391162  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Wang, Weitian;Zhang, Lixin;Yuan, Dehua;Sun, Yuming;
7:2:81:9     In-plane dielectric properties of epitaxial Ba0.7Sr0.3TiO3 thin films grown on GaAs for tunable device application
DOI:10.1063/1.4749270  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Yang, Zhibin;Hao, Jianhua;
7:2:81:10     Epitaxial Growth and Ferroelectricity of BaTiO3 on SrRuO3/TiO2 Buffered GaN
DOI:10.1080/00150193.2010.484334  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Luo, W. B.;Zhu, J.;Li, Y. R.;Zhang, Y.;Chen, H.;
7:2:81:11     Epitaxial growth of ZnO layers on (111) GaAs substrates by laser molecular beam epitaxy
DOI:10.1016/j.tsf.2011.11.018  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Ding, Jian;Zhang, Di;Konomi, Takaharu;Saito, Katsuhiko;Guo, Qixin;
7:2:82:1     Sub-Picosecond Processes of Ferroelectric Domain Switching from Field and Temperature Experiments
DOI:10.1002/adfm.201101521  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:13  AU: Jiang, An Quan;Lee, Hyun Ju;Hwang, Cheol Seong;Scott, James F.;
7:2:82:2     Subpicosecond Domain Switching in Discrete Regions of Pb(Zr0.35Ti0.65)O3 Thick Films
DOI:10.1002/adfm.201102829  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:5  AU: Jiang, An Quan;Chen, Zhi Hui;Hui, Wen Yuan;Wu, Dongping;Scott, James F.;
7:2:82:3     High-temperature, high-pressure Raman spectra and their intrinsic anharmonic effects in the perovskite Pb1-xLaxTiO3
DOI:10.1063/1.4772721  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Joya, Miryam R.;Barba-Ortega, J.;Pizani, P. S.;
7:2:82:4     Pressure-temperature-La concentration three-dimensional phase diagram of La-modified PbTiO3 determined by Raman scattering
DOI:10.1063/1.3464971  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Joya, M. R.;Pizani, P. S.;
7:2:82:5     In situ structure characterization of Pb(Yb1/2Nb1/2)O-3-PbTiO3 crystals under high pressure-temperature
DOI:10.1063/1.4742165  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Kong, Lingping;Wang, Luhong;Zhang, Shujun;Tschauner, Oliver;Zhao, Yusheng;Yang, Wenge;Liu, Haozhe;Mao, Ho-kwang;
7:2:82:6     Thermal equations of state and phase relation of PbTiO3: A high P-T synchrotron x-ray diffraction study
DOI:10.1063/1.3651377  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Zhu, Jinlong;Xu, Hongwu;Zhang, Jianzhong;Jin, Changqing;Wang, Liping;Zhao, Yusheng;
7:2:82:7     Thermodynamic and mechanical properties of TiC from ab initio calculation
DOI:10.1063/1.4890307  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Dang, D. Y.;Fan, J. L.;Gong, H. R.;
7:2:82:8     Piezoelectric and dielectric characteristics of lead-free BNKLBT ceramic thick film and multilayered piezoelectric actuators
DOI:10.1016/j.ceramint.2010.07.030  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:5  AU: Choy, S. H.;Jiang, X. P.;Kwok, K. W.;Chan, H. L. W.;
7:2:82:9     Thermal equation of state of TiC: A synchrotron x-ray diffraction study
DOI:10.1063/1.3436571  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Yu, Xiaohui;Lin, Zhijun;Zhang, Jianzhong;Wang, Liping;Ding, Zejun;Jin, Changqing;Zhao, Yusheng;
7:2:82:10     The creep process of the domain switching in poly(vinylidene fluoride-trifluoroethylene) ferroelectric thin films
DOI:10.1063/1.4816749  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Tian, B. B.;Chen, Z. H.;Jiang, A. Q.;Zhao, X. L.;Liu, B. L.;Wang, J. L.;Han, L.;Sun, Sh.;Sun, J. L.;Meng, X. J.;Chu, J. H.;
7:2:82:11     Estimation of film-electrode contact resistance and domain switching time from ferroelectric polarization-voltage hysteresis loops
DOI:10.1016/j.tsf.2013.07.060  JN:THIN SOLID FILMS  PY:2013
  TC:0  AU: Jiang, A. Q.;Zhang, D. W.;
7:2:83:1     Growth and characterisation of multiferroic BiFeO3 films with fully saturated ferroelectric hysteresis loops and large remanent polarisations
DOI:10.1016/j.jeurceramsoc.2009.05.038  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:15  AU: Qi, Xiaoding;Chang, Wen-Chih;Kuo, Jui-Chao;Chen, In-Gann;Chen, Yi-Chun;Ko, Cheng-Hung;Huang, Jung-Chun-Andrew;
7:2:83:2     Exchange bias and magneto-resistance in an all-oxide spin valve with multi-ferroic BiFeO3 as the pinning layer
DOI:10.1016/j.actamat.2013.08.054  JN:ACTA MATERIALIA  PY:2013
  TC:1  AU: Lin, Wei-Jui;Chang, Wei-Che;Qi, Xiaoding;
7:2:83:3     Magnetic and Dielectric Properties of Nanostructured BiFeO3 Prepared by Sol-Gel Method
DOI:10.1111/jace.12960  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Lu, Shih-Zong;Qi, Xiaoding;
7:2:83:4     Substrate-dependant chemical stability and conductivity of LaNiO3-x thin films
DOI:10.1016/j.tsf.2012.05.049  JN:THIN SOLID FILMS  PY:2013
  TC:4  AU: Hsiao, Chun-Lung;Qi, Xiaoding;
7:2:83:5     Epitaxial growth and exchange coupling of spinel ferrimagnet Ni0.3Zn0.7Fe2O4 on multiferroic BiFeO3
DOI:10.1016/j.tsf.2011.03.068  JN:THIN SOLID FILMS  PY:2011
  TC:5  AU: Lin, Wei-Jui;Qi, Xiaoding;Chern, Gung;Huang, Jung-Chun-Andrew;
7:2:83:6     Direct observation of oxygen vacancy and its effect on the microstructure, electronic and transport properties of sputtered LaNiO3-delta films on Si substrates
DOI:10.1016/j.tsf.2010.08.129  JN:THIN SOLID FILMS  PY:2010
  TC:8  AU: Qiao, Liang;Bi, Xiaofang;
7:2:83:7     Sputter-epitaxy and electric properties of multiferroic Bim+1Fem-3Ti3O3m+3 thin films
DOI:10.1016/j.tsf.2011.03.069  JN:THIN SOLID FILMS  PY:2011
  TC:1  AU: Yamaguchi, K.;Gomi, M.;Shimizu, Y.;Yokota, T.;
7:2:83:8     Structural, Dielectric and Leakage Current Behaviors of Ti-Substituted BiFeO3 Ceramics
DOI:10.1080/00150193.2010.492028  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Cho, J. H.;Lee, S. C.;Yeo, H. G.;Sung, Y. S.;Kim, M. -H.;Song, T. K.;Kim, S. S.;Choi, B. C.;
7:2:83:9     Annealing temperature dependence of exchange bias in BiFeO3/CoFe bilayers
DOI:10.1063/1.3673435  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Yu, T.;Naganuma, H.;Wang, W. X.;Ando, Y.;Han, X. F.;
7:2:84:1     Chiral Selectivity of Unusual Helimagnetic Transition in Iron Nanotubes: Chirality Makes Quantum Helimagnets
DOI:10.1021/nl401047z  JN:NANO LETTERS  PY:2013
  TC:5  AU: Shimada, Takahiro;Okuno, Junichi;Kitamura, Takayuki;
7:2:84:2     Ab initio study of magnetism at iron surfaces under epitaxial in-plane strain
DOI:10.1103/PhysRevB.81.134420  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Shimada, Takahiro;Ishii, Yoshiyuki;Kitamura, Takayuki;
7:2:84:3     Ab initio study of ferromagnetic single-wall nickel nanotubes
DOI:10.1103/PhysRevB.84.165452  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Shimada, Takahiro;Ishii, Yoshiyuki;Kitamura, Takayuki;
7:2:84:4     Chiral selectivity of improper ferroelectricity in single-wall PbTiO3 nanotubes
DOI:10.1103/PhysRevB.89.144102  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wang, Jie;Xu, Tao;Shimada, Takahiro;Wang, Xiaoyuan;Zhang, Tong-Yi;Kitamura, Takayuki;
7:2:84:5     Ab initio study of energetics and magnetism of Fe, Co, and Ni along the trigonal deformation path
DOI:10.1103/PhysRevB.83.184424  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Zeleny, M.;Friak, M.;Sob, M.;
7:2:84:6     Ab initio study of spin-spiral noncollinear magnetism in a free-standing Fe(110) monolayer under in-plane strain
DOI:10.1103/PhysRevB.85.134440  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Shimada, Takahiro;Okuno, Junichi;Kitamura, Takayuki;
7:2:84:7     Ab initio study of ferromagnetism in edged iron nanowires under axial strain
DOI:10.1103/PhysRevB.84.174405  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Shimada, Takahiro;Ishii, Yoshiyuki;Kitamura, Takayuki;
7:2:84:8     Influence of normal and shear strain on magnetic anisotropy energy of hcp cobalt: An ab initio study
DOI:10.1557/jmr.2013.149  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:1  AU: Wang, Juan;Albina, Jan-Michael;Iwasaki, Tomio;Moriya, Hiroshi;Umeno, Yoshitaka;
7:2:85:1     Very large dielectric response from ferroelectric nanocapacitor films due to collective surface and strain relaxation effects
DOI:10.1063/1.4831939  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Misirlioglu, I. B.;Yildiz, M.;
7:2:85:2     Misfit strain-film thickness phase diagrams and related electromechanical properties of epitaxial ultra-thin lead zirconate titanate films
DOI:10.1016/j.actamat.2009.09.060  JN:ACTA MATERIALIA  PY:2010
  TC:13  AU: Qiu, Q. Y.;Mahjoub, R.;Alpay, S. P.;Nagarajan, V.;
7:2:85:3     Piezoelectric response of single-crystal PbZr1-xTixO3 near morphotropic phase boundary predicted by phase-field simulation
DOI:10.1063/1.3530443  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Cao, Y.;Sheng, G.;Zhang, J. X.;Choudhury, S.;Li, Y. L.;Randall, C. A.;Chen, L. Q.;
7:2:85:4     Phase-field simulations of thickness-dependent domain stability in PbTiO3 thin films
DOI:10.1016/j.actamat.2012.03.003  JN:ACTA MATERIALIA  PY:2012
  TC:6  AU: Sheng, G.;Hu, J. M.;Zhang, J. X.;Li, Y. L.;Liu, Z. K.;Chen, L. Q.;
7:2:85:5     Inhibition of polydomain formation in PbTiO3/PbZr0.2Ti0.8O3 superlattices by intercalation of ultra-thin SrTiO3 layers
DOI:10.1063/1.3619843  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Hubault, C.;Davoisne, C.;Dupont, L.;Perrin, A.;Boulle, A.;Holc, J.;Kosec, M.;Karkut, M. G.;Lemee, N.;
7:2:85:6     Strain effect in PbTiO3/PbZr0.2Ti0.8O3 superlattices: From polydomain to monodomain structures
DOI:10.1063/1.4767329  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Hubault, C.;Davoisne, C.;Boulle, A.;Dupont, L.;Demange, V.;Perrin, A.;Gautier, B.;Holc, J.;Kosec, M.;Karkut, M. G.;Lemee, N.;
7:2:85:7     Structural investigation of interface and defects in epitaxial Bi3.25La0.75Ti3O12 film on SrRuO3/SrTiO3 (111) and (100)
DOI:10.1063/1.4775598  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Gunawan, Lina;Zhu, Guo-zhen;Shao, Yang;Lazar, Sorin;Gautreau, Olivier;Harnagea, Catalin;Pignolet, Alain;Botton, Gianluigi A.;
7:2:86:1:1     Direct writing of ferroelectric domains on strontium barium niobate crystals using focused ultraviolet laser light
DOI:10.1063/1.4823702  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Boes, Andreas;Crasto, Tristan;Steigerwald, Hendrik;Wade, Scott;Frohnhaus, Jakob;Soergel, Elisabeth;Mitchell, Arnan;
7:2:86:1:2     Ultraviolet laser induced domain inversion on chromium coated lithium niobate crystals
DOI:10.1364/OME.4.000241  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:1  AU: Boes, Andreas;Yudistira, Didit;Crasto, Tristan;Steigerwald, Hendrik;Sivan, Vijay;Limboeck, Thorsten;Friend, James;Mailis, Sakellaris;Soergel, Elisabeth;Mitchell, Arnan;
7:2:86:1:3     Direct writing of ferroelectric domains on the x- and y-faces of lithium niobate using a continuous wave ultraviolet laser
DOI:10.1063/1.3553194  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Steigerwald, H.;Ying, Y. J.;Eason, R. W.;Buse, K.;Mailis, S.;Soergel, E.;
7:2:86:1:4     Ultrafast laser inscription of bistable and reversible waveguides in strontium barium niobate crystals
DOI:10.1063/1.3429584  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Jaque, D.;Psaila, N. D.;Thomson, R. R.;Chen, F.;Maestro, L. M.;Rodenas, A.;Reid, D. T.;Kar, A. K.;
7:2:86:2:1     Origin of UV-induced poling inhibition in lithium niobate crystals
DOI:10.1103/PhysRevB.82.214105  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Steigerwald, H.;Lilienblum, M.;von Cube, F.;Ying, Y. J.;Eason, R. W.;Mailis, S.;Sturman, B.;Soergel, E.;Buse, K.;
7:2:86:2:2     Pyroelectric field assisted ion migration induced by ultraviolet laser irradiation and its impact on ferroelectric domain inversion in lithium niobate crystals
DOI:10.1063/1.4818828  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Ying, C. Y. J.;Daniell, G. J.;Steigerwald, H.;Soergel, E.;Mailis, S.;
7:2:86:2:3     Ferroelectric domain building blocks for photonic and nonlinear optical microstructures in LiNbO3
DOI:10.1063/1.4868907  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zisis, G.;Ying, C. Y. J.;Soergel, E.;Mailis, S.;
7:2:86:2:4     Ultraviolet laser-induced poling inhibition produces bulk domains in MgO-doped lithium niobate crystals
DOI:10.1063/1.4895387  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Boes, Andreas;Steigerwald, Hendrik;Yudistira, Didit;Sivan, Vijay;Wade, Scott;Mailis, Sakellaris;Soergel, Elisabeth;Mitchell, Arnan;
7:2:86:3:1     Ellipsometric study of near band gap optical properties of SrxBa1-xNb2O6 crystals
DOI:10.1016/j.optmat.2012.10.050  JN:OPTICAL MATERIALS  PY:2013
  TC:3  AU: Dorywalski, K.;Andriyevsky, B.;Cobet, C.;Piasecki, M.;Kityk, I. V.;Esser, N.;Lukasiewicz, T.;Patryn, A.;
7:2:86:3:2     Fabrication of Sr0.5Ba0.5Nb2O6 Nanocrystallite-Precipitated Transparent Phosphate Glass-Ceramics
DOI:10.1111/jace.12547  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:0  AU: Masai, Hirokazu;Shirai, Ryota;Miyazaki, Takamichi;Yoshida, Kazuki;Fujiwara, Takumi;Tokuda, Yomei;Yoko, Toshinobu;
7:2:86:3:3     Spectral Ellipsometry Study of SBN Single Crystals in Visible and Ultraviolet Region
DOI:10.1080/00150193.2011.578460  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Andriyevsky, B.;Dorywalski, K.;Kityk, I.;Piasecki, M.;Lukasiewicz, T.;Swirkowicz, M.;Patryn, A.;Dec, J.;Esser, N.;Cobet, C.;
7:2:86:3:4     Electronic and Optical Properties of Strontium Barium Niobate Single Crystals
DOI:10.1080/00150193.2012.671735  JN:FERROELECTRICS  PY:2012
  TC:5  AU: Andriyevsky, Bohdan;Patryn, Aleksy;Dorywalski, Krzysztof;Cobet, Christoph;Piasecki, Michal;Kityk, Iwan;Esser, Norbert;Lukasiewicz, Tadeusz;Dec, Jan;
7:2:86:4:1     High temperature oxidation of chromium: Kinetic modeling and microstructural investigation
DOI:10.1016/j.ssi.2013.02.017  JN:SOLID STATE IONICS  PY:2013
  TC:3  AU: Hallstrom, Samuel;Halvarsson, Mats;Hoglund, Lars;Jonsson, Torbjorn;Agren, John;
7:2:86:4:2     Modeling of iron diffusion in the iron oxides magnetite and hematite with variable stoichiometry
DOI:10.1016/j.actamat.2010.08.032  JN:ACTA MATERIALIA  PY:2011
  TC:12  AU: Hallstrom, Samuel;Hoglund, Lars;Agren, John;
7:2:87:1     Detection of the magnetic and electric transitions by electron paramagnetic resonance and low-field microwave absorption in the magnetoelectric Pb(Fe0.5Ta0.5)O-3
DOI:10.1016/j.jallcom.2010.08.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Alvarez, G.;Montiel, H.;Pena, J. A.;Castellanos, M. A.;Zamorano, R.;
7:2:87:2     Yafet-Kittel-type magnetic ordering in Ni0.35Zn0.65Fe2O4 ferrite detected by magnetosensitive microwave absorption measurements
DOI:10.1016/j.jmmm.2009.09.056  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:16  AU: Alvarez, G.;Montiel, H.;Barron, J. F.;Gutierrez, M. P.;Zamorano, R.;
7:2:87:3     Resonant and non-resonant microwave absorption in the magnetoelectric YCrO3 through ferro-paraelectric transition
DOI:10.1016/j.jallcom.2011.06.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Alvarez, G.;Montiel, H.;Cruz, M. P.;Duran, A. C.;Zamorano, R.;
7:2:87:4     Signature of ferro-paraelectric transition in biferroic LuCrO3 from electron paramagnetic resonance and non-resonant microwave absorption
DOI:10.1016/j.matchemphys.2014.09.027  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:1  AU: Alvarez, G.;Montiel, H.;Duran, A.;Conde-Gallardo, A.;Zamorano, R.;
7:2:87:5     Magnetic and ferroelectric properties of multiferroic Bi2NiMnO6 nanoparticles
DOI:10.1063/1.3537943  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Du, Y.;Cheng, Z. X.;Wang, X. L.;Liu, P.;Dou, S. X.;
7:2:87:6     Detection of para-antiferromagnetic transition in Bi2Fe4O9 powders by means of microwave absorption measurements
DOI:10.1016/j.jmmm.2013.08.014  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:7  AU: Alvarez, G.;Contreras, J.;Conde-Gallardo, A.;Montiel, H.;Zamorano, R.;
7:2:87:7     Microwave absorption measurements in the complex perovskite Pb(Fe0.5Ta0.5)O-3: Detection of short-range orderly regions
DOI:10.1016/j.matchemphys.2011.07.028  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:3  AU: Alvarez, G.;Montiel, H.;Castellanos, M. A.;Heiras, J.;Zamorano, R.;
7:2:87:8     Influence of SrTiO3 Buffer Layer on the Ferroelectric Properties of Bi2NiMnO6 Thin Film
DOI:10.1080/10584587.2012.737206  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:3  AU: Lai, J. L.;Tang, X. G.;Ma, C. B.;Li, R.;Liu, Q. X.;Jiang, Y. P.;
7:2:87:9     Lattice Dynamics and Ferroelectric Properties of SrTiO3 (100) Thin Film in a Nonempirical Model of Polarizable Ions
DOI:10.1080/00150193.2011.577314  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Zhandun, V. S.;Zinenko, V. I.;
7:2:88:1     Theoretical investigation of {110} generalized stacking faults and their relation to dislocation behavior in perovskite oxides
DOI:10.1016/j.actamat.2010.07.025  JN:ACTA MATERIALIA  PY:2010
  TC:14  AU: Hirel, P.;Marton, P.;Mrovec, M.;Elsaesser, C.;
7:2:88:2     Atomistic simulation study of < 1 1 0 > dislocations in strontium titanate
DOI:10.1016/j.actamat.2011.09.049  JN:ACTA MATERIALIA  PY:2012
  TC:8  AU: Hirel, P.;Mrovec, M.;Elsaesser, C.;
7:2:88:3     Dislocation dissociation and stacking-fault energy calculation in strontium titanate
DOI:10.1016/j.scriptamat.2009.11.016  JN:SCRIPTA MATERIALIA  PY:2010
  TC:8  AU: Castillo-Rodriguez, M.;Sigle, W.;
7:2:88:4     Concurrent atomistic and continuum simulation of strontium titanate
DOI:10.1016/j.actamat.2012.09.032  JN:ACTA MATERIALIA  PY:2013
  TC:4  AU: Yang, Shengfeng;Xiong, Liming;Deng, Qian;Chen, Youping;
7:2:88:5     A concurrent scheme for passing dislocations from atomistic to continuum domains
DOI:10.1016/j.actamat.2011.11.002  JN:ACTA MATERIALIA  PY:2012
  TC:12  AU: Xiong, Liming;Deng, Qian;Tucker, Garritt;McDowell, David L.;Chen, Youping;
7:2:88:6     Modelling thermal activation of < 1 1 0 >{110} slip at low temperature in SrTiO3
DOI:10.1016/j.scriptamat.2010.04.045  JN:SCRIPTA MATERIALIA  PY:2010
  TC:6  AU: Carrez, P.;Ferre, D.;Denoual, C.;Cordier, P.;
7:2:88:7     Atomic core structure and mobility of [100](010) and [010](100) dislocations in MgSiO3 perovskite
DOI:10.1016/j.actamat.2014.07.001  JN:ACTA MATERIALIA  PY:2014
  TC:0  AU: Hirel, P.;Kraych, A.;Carrez, P.;Cordier, P.;
7:2:88:8     The kink-pair mechanism and low-temperature flow-stress behaviour of strontium titanate single crystals
DOI:10.1016/j.scriptamat.2010.10.014  JN:SCRIPTA MATERIALIA  PY:2011
  TC:2  AU: Castillo-Rodriguez, M.;Sigle, W.;
7:2:88:9     Stacking faults in an epitaxially grown PbTiO3 thick film and their size distribution
DOI:10.1016/j.mseb.2012.01.013  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:0  AU: Aoyagi, Kenta;Kodama, Yumiko;Kiguchi, Takanori;Ehara, Yoshitaka;Funakubo, Hiroshi;Konno, Toyohiko J.;
7:2:88:10     Nucleation and growth of dislocation loops in Cu, Al and Si by a concurrent atomistic-continuum method
DOI:10.1016/j.scriptamat.2012.07.026  JN:SCRIPTA MATERIALIA  PY:2012
  TC:3  AU: Xiong, Liming;McDowell, David L.;Chen, Youping;
7:2:89:1     First-principles study of A-site substitution in ferroelectric bismuth titanate
DOI:10.1007/s10853-014-8363-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:0  AU: Xue, Kan-Hao;Fonseca, Leonardo R. C.;Nishi, Yoshio;
7:2:89:2     Effect of Gd substitution on ferroelectric and magnetic properties of Bi4Ti3O12
DOI:10.1016/j.matlet.2010.02.016  JN:MATERIALS LETTERS  PY:2010
  TC:10  AU: Khomchenko, V. A.;Kakazei, G. N.;Pogorelov, Y. G.;Araujo, J. P.;Bushinsky, M. V.;Kiselev, D. A.;Kholkin, A. L.;Paixao, J. A.;
7:2:89:3     Multiferroic behavior of Aurivillius Bi4Mn3O12 from first principles
DOI:10.1103/PhysRevB.85.224112  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Tinte, Silvia;Stachiotti, M. G.;
7:2:89:4     Temperature-dependent ferroelectric and dielectric properties of Bi3.25La0.75Ti3O12 thin films
DOI:10.1016/j.apsusc.2009.10.089  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:7  AU: Zhang, Shan-Tao;Chen, Zhong;Zhang, Chong;Yuan, Guo-Liang;
7:2:89:5     A comparative study on Bi4Ti3O12 and Bi3.25La0.75Ti3O12 ferroelectric thin films derived by metal organic decomposition
DOI:10.1063/1.3428968  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Xue, Kan-Hao;de Araujo, Carlos A. Paz;Celinska, Jolanta;
7:2:89:6     Influence of the stereochemically active bismuth lone pair structure on ferroelectricity and photocalytic activity of Aurivillius phase Bi2WO6
DOI:10.1103/PhysRevB.83.014103  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Mohn, Chris E.;Stolen, Svein;
7:2:89:7     Leakage current characteristics of Bi3.15Nd0.85Ti3-xZrxO12 thin films
DOI:10.1016/j.matlet.2010.08.043  JN:MATERIALS LETTERS  PY:2010
  TC:1  AU: Zhong, X. L.;Liao, H.;Hu, Z. S.;Li, B.;Wang, J. B.;
7:2:89:8     Low leakage current in (Bi0.95La0.05)(2)NiMnO6 double-perovskite thin films prepared by chemical solution deposition
DOI:10.1016/j.matlet.2014.01.025  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Li, Wan-peng;Liu, Qiu-xiang;Tang, Xin-gui;Lai, Ju-lan;Jiang, Yan-ping;
7:2:89:9     Investigation on Divalent Metal Substituted Bismuth Titanate Ferroelectric Thin Films
DOI:10.1080/10584587.2011.573714  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:0  AU: Xue, Kan-Hao;de Araujo, Carlos A. Paz;Celinska, Jolanta;McWilliams, Christopher;
7:2:89:10     Temperature dependence of ferroelectric and dielectric properties of textured 0.98(0.94Na(0.5)Bi(0.5)TiO(3)-0.06BaTiO(3))-0.02K(0.5)Na(0.5)NbO(3) thick film
DOI:10.1007/s10853-010-4872-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:1  AU: Fu, Fang;Zhai, Jiwei;Xu, Zhengkui;Ye, Chenggen;Yao, Xi;
7:2:89:11     Conductivity investigations of Aurivillius-type Bi2.5Gd1.5Ti3O12 ceramics
DOI:10.1016/j.ssi.2010.10.027  JN:SOLID STATE IONICS  PY:2011
  TC:2  AU: Masiukaite, E.;Banys, J.;Sobiestianskas, R.;Ramoska, T.;Khomchenko, V. A.;Kiselev, D. A.;
7:2:89:12     Testing field and annealing temperature dependence of leakage properties in Bi3.25La0.75Ti3O12 thin films
DOI:10.1016/j.tsf.2010.11.021  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Wu, Xiumei;Dong, Shuai;Zhai, Ya;Xu, Mingxiang;Kan, Yi;
7:2:90:1     Enhancement in the multiferroic properties of BiFeO3 by charge compensated aliovalent substitution of Ba and Nb
DOI:10.1063/1.4869081  JN:AIP ADVANCES  PY:2014
  TC:4  AU: Makhdoom, A. R.;Akhtar, M. J.;Rafiq, M. A.;Siddique, M.;Iqbal, M.;Hasan, M. M.;
7:2:90:2     Tunable magnetization and spin transfer induced by electric field in magnetic ultrathin BiFeO3 layer
DOI:10.1063/1.4823515  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Feng, Hong-Jian;
7:2:90:3     The role of Coulomb and exchange interaction on the Dzyaloshinskii-Moriya interaction (DMI) in BiFeO3
DOI:10.1016/j.jmmm.2009.12.025  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:14  AU: Feng, Hongjian;
7:2:90:4     Magnetism and electronic properties of BiFeO3 under lower pressure
DOI:10.1016/j.jmmm.2010.07.034  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:10  AU: Feng, Hongjian;
7:2:90:5     The reversal of magnetization driven by the Dzyaloshinskii-Moriya interaction in Bi2FeMnO6
DOI:10.1016/j.jmmm.2011.08.005  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:8  AU: Feng, Hong-Jian;
7:2:91:1     Thickness-dependent twinning evolution and ferroelectric behavior of epitaxial BiFeO3 (001) thin films
DOI:10.1103/PhysRevB.82.064108  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Liu, Huajun;Yao, Kui;Yang, Ping;Du, Yonghua;He, Qing;Gu, Yueliang;Li, Xiaolong;Wang, Sisheng;Zhou, Xingtai;Wang, John;
7:2:91:2     Preparation and electric properties of BiFeO3 film by electrophoretic deposition
DOI:10.1016/j.jallcom.2014.03.161  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Liu, Kaihua;Cai, Wei;Fu, Chunlin;Lei, Kang;Xiang, Lian;Gong, Xinbo;
7:2:91:3     Ultrathin Oriented BiFeO3 Films from Deposition of Atomic Layers with Greatly Improved Leakage and Ferroelectric Properties
DOI:10.1021/am404498y  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:2  AU: Liu, Yen-Ting;Ku, Ching-Shun;Chiu, Shang-Jui;Lee, Hsin-Yi;Chen, San-Yuan;
7:2:91:4     Hydrothermal epitaxial multiferroic BiFeO3 thick film by addition of the PVA
DOI:10.1016/j.jallcom.2013.04.148  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Si, Hua-Yan;Lu, Wen-lai;Chen, Jing-Sheng;Chow, Gan-Moog;Sun, Xiuguo;Zhao, Jinjin;
7:2:91:5     Low temperature hydrothermal epitaxy of heteroepitaxial BiFeO3 film
DOI:10.1016/j.ceramint.2011.05.018  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Han, S. H.;Cheon, C. I.;Lee, H-G.;Kang, H-W.;Hwang, H. I.;
7:2:91:6     Preparation and electrical properties of Sm-doped Bi2Ti2O7 thin films prepared on Pt (111) substrates
DOI:10.1016/j.ceramint.2012.07.035  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Sui, H. T.;Yang, D. M.;Jiang, H.;Ding, Y. L.;Yang, C. H.;
7:2:91:7     Effect of magnetic annealing on magnetization of BiFeO3 ceramics
DOI:10.1016/j.jmmm.2012.03.010  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Luo, Wanju;Zhang, Shuxia;Wang, Dongliang;Ma, Yanwei;Wang, Fangwei;Watanabe, Kazuo;
7:2:91:8     Fabrication and ferroelectric properties of BiFeO3/LaNiO3 artificial superlattice structures grown by radio-frequency magnetron-sputtering
DOI:10.1016/j.tsf.2012.07.073  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Liu, Yen-Ting;Chiu, Shang-Jui;Lee, Hsin-Yi;Chen, San-Yuan;
7:2:91:9     Characteristics of highly orientated BiFeO3 thin films on a LaNiO3-coated Si substrate by RF sputtering
DOI:10.1016/j.tsf.2010.05.003  JN:THIN SOLID FILMS  PY:2010
  TC:1  AU: Liu, Yen-Ting;Chen, San-Yuan;Lee, Hsin-Yi;
7:2:92:1     Preface to special topic: Piezoresponse force microscopy and nanoscale phenomena in polar materials
DOI:10.1063/1.3625609  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Kalinin, Sergei V.;Kholkin, Andrei L.;
7:2:92:2     Step bunching-induced vertical lattice mismatch and crystallographic tilt in vicinal BiFeO3(001) films
DOI:10.1063/1.3535981  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:14  AU: Kim, T. H.;Baek, S. H.;Jang, S. Y.;Yang, S. M.;Chang, S. H.;Song, T. K.;Yoon, J. -G.;Eom, C. B.;Chung, J. -S.;Noh, T. W.;
7:2:92:3     Domain Wall Roughness in Stripe Phase BiFeO3 Thin Films
DOI:10.1103/PhysRevLett.111.247604  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Ziegler, B.;Martens, K.;Giamarchi, T.;Paruch, P.;
7:2:92:4     Domain growth and domain wall roughness along different directions in LiNbO3 single crystal
DOI:10.1063/1.4891355  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Du, Yingchao;Bo, Huifeng;Kan, Yi;Jin, Yaming;Lu, Xiaomei;Xu, Tingting;Xiao, Shuyu;Yue, Chen;Huang, Fenzheng;Zhu, Jinsong;
7:2:92:5     Anisotropic relaxation and crystallographic tilt in BiFeO3 on miscut SrTiO3 (001)
DOI:10.1063/1.3299256  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Sichel, Rebecca J.;Grigoriev, Alexei;Do, Dal-Hyun;Baek, Seung-Hyub;Jang, Ho-Won;Folkman, Chad M.;Eom, Chang-Beom;Cai, Zhonghou;Evans, Paul G.;
7:2:92:6     Thermal-induced domain wall motion of tip-inverted micro/nanodomains in near-stoichiometric LiNbO3 crystals
DOI:10.1063/1.3624808  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Liu, X. Y.;Kitamura, K.;Liu, Y. M.;Ohuchi, F. S.;Li, J. Y.;
7:2:93:1     Lattice, elastic properties and Debye temperatures of ATiO(3) (A = Ba, Ca, Pb, Sr) from first-principles
DOI:10.1016/j.jallcom.2012.08.120  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:17  AU: Long, Jianping;Yang, Lijun;Wei, Xuesong;
7:2:93:2     Structural and thermoelastic properties of CaTiO3 perovskite between 7 K and 400 K
DOI:10.1016/j.jallcom.2011.03.014  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:10  AU: Knight, Kevin S.;
7:2:93:3     Mechanism for suppression of ferroelectricity in Cd1-xCaxTiO3
DOI:10.1103/PhysRevB.84.174106  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Taniguchi, Hiroki;Soon, Hwee Ping;Shimizu, Takao;Moriwake, Hiroki;Shan, Yue Jin;Itoh, Mitsuru;
7:2:93:4     A molecular dynamics study of structural and dynamical correlations of CaTiO3
DOI:10.1016/j.actamat.2010.11.003  JN:ACTA MATERIALIA  PY:2011
  TC:4  AU: Souza, J. A.;Rino, J. P.;
7:2:93:5     Elastic Properties and Debye Temperature of Zn Doped PbTiO3 from First Principles Calculation
DOI:10.1080/10584587.2014.905154  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Wattanasarn, Hassakorn;Seetawan, Tosawat;
7:2:93:6     Thermomechanical properties of calcium series perovskite-type oxides
DOI:10.1016/j.jallcom.2010.05.088  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Yang, Hongyan;Ohishi, Yuji;Kurosaki, Ken;Muta, Hiroaki;Yamanaka, Shinsuke;
7:2:93:7     The elastic and thermodynamic properties of new antiperovskite-type superconductor CuNNi3 under pressure
DOI:10.1016/j.mssp.2014.06.042  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:3  AU: Chen, Haichuan;Lei, Xia;Long, Jianping;Huang, Wen;
7:2:93:8     Theoretical investigation of the elastic, Vickers hardness and thermodynamic properties of delta-WN under pressure
DOI:10.1016/j.mssp.2014.08.041  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:1  AU: Wei, Jin Cheng;Chen, Hai Chuan;Huang, Wen;Long, Jianping;
7:2:93:9     First-principles calculations of lattice dynamics in CdTiO3 and CaTiO3: Phase stability and ferroelectricity
DOI:10.1103/PhysRevB.84.104114  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Moriwake, Hiroki;Kuwabara, Akihide;Fisher, Craig A. J.;Taniguchi, Hiroki;Itoh, Mitsuru;Tanaka, Isao;
7:2:93:10     An interaction potential for barium sulfide: A molecular dynamics study
DOI:10.1016/j.commatsci.2014.05.053  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:1  AU: Rino, Jose Pedro;
7:2:93:11     Effect of Ca-Substitution on CdTiO3 Studied by Raman Scattering and First Principles Calculations
DOI:10.1080/00150193.2012.672035  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Taniguchi, Hiroki;Soon, Hwee Ping;Moriwake, Hiroki;Shan, Yue Jin;Itoh, Mitsuru;
7:2:94:1     BiGaO3-Based Perovskites: A Large Family of Polar Materials
DOI:10.1021/cm301603v  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:16  AU: Belik, Alexei A.;Rusakov, Dmitriy A.;Furubayashi, Takao;Takayama-Muromachi, Eiji;
7:2:94:2     Phase transition and huge ferroelectric polarization observed in BiFe1-xGaxO3 thin films
DOI:10.1063/1.4809955  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Yan, Jingdan;Gomi, Manabu;Yokota, Takeshi;Song, Huaihe;
7:2:94:3     Electronic structure and optical responses of nanocrystalline BiGaO3 films: A combination study of experiment and theory
DOI:10.1063/1.4867006  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhang, J. Z.;Ding, H. C.;Zhu, J. J.;Li, Y. W.;Hu, Z. G.;Duan, C. G.;Meng, X. J.;Chu, J. H.;
7:2:94:4     Electronic structure and lattice dynamics of orthorhombic BiGaO3
DOI:10.1016/j.jallcom.2014.06.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Kaczkowski, J.;
7:2:95:1:1     Ferroelectric and ferromagnetic properties of Gd-doped BiFeO3-BaTiO3 solid solution
DOI:10.1016/j.matchemphys.2009.10.011  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:25  AU: Rai, Radheshyam;Bdikin, Igor;Valente, Manuel Almeida;Kholkin, Andrei L.;
7:2:95:1:2     Influence of heating rate on the crystalline properties of 0.7BiFeO(3)-0.3PbTiO(3) thin films prepared by sol-gel process
DOI:10.1016/j.apsusc.2010.08.044  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:5  AU: Li, Haimin;Zhou, Yuanyuan;Tian, Yunfei;Li, Xuedong;Guo, Hongli;Xiao, Dingquan;Zhu, Jianguo;
7:2:95:1:3     Investigation on ferromagnetic and ferroelectric properties of (La, K)-doped BiFeO3-BaTiO3 solid solution
DOI:10.1016/j.ceramint.2012.10.071  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Prasatkhetragarn, Anurak;Muangkonkad, Pantip;Aommongkol, Parichart;Jantaratana, Pongsakorn;Vittayakorn, Naratip;Yimnirun, Rattikorn;
7:2:95:1:4     Ferroelectromagnetic characteristic of Na-doped 0.75BiFeO(3)-0.25BaTiO(3) multiferroic ceramics
DOI:10.1016/j.ceramint.2012.10.070  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Prasatkhetragarn, Anurak;Arthan, Amrnaruta;Jantaratana, Pongsakorn;Vittayakorn, Naratip;Yotburut, Benjaporn;Yimnirun, Rattikorn;
7:2:95:1:5     Ferroelectric and Ferromagnetic Properties of K-doped 0.7BiFeO(3)-0.3BaTiO(3) Multiferroic Ceramics
DOI:10.1080/00150193.2013.839282  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Prasatkhetragarn, A.;Jantaratana, P.;Vittayakorn, N.;Yotburut, B.;Yimnirun, R.;
7:2:95:1:6     Effect of Temperature on Ferroelectric Properties of Bismuth Ferrite-Barium Titanate
DOI:10.1080/10584587.2013.852027  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Sratta, Yuthapong;Chandarak, Sujittra;Unruan, Muangjai;Kantha, Puripat;Marungsri, Boonruang;Yimnirun, Rattikorn;Pojprapai, Soodkhet;
7:2:95:1:7     Multiferroic and relaxor properties of Pb0 7Sr0 3[(Fe2/3Ce1/3)(0 012)Ti-0 988]O-3 and Pb0 7Sr0 3[(Fe2/3La1/3)(0 012)Ti-0 988]O-3 nanoparticles
DOI:10.1016/j.matchemphys.2010.07.075  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:1  AU: Verma, Kuldeep Chand;Bhatt, S. S.;Ram, Mast;Negi, N. S.;Kotnala, R. K.;
7:2:95:2:1     Magneto-Dielectric Properties of Epitaxial Ba(Fe0.5Sn0.5)O3-delta Thin Films on (001) SrTiO3 Substrates by Pulsed Laser Deposition
DOI:10.2320/matertrans.M2013429  JN:MATERIALS TRANSACTIONS  PY:2014
  TC:3  AU: Shinoda, Ryoichi;Iwase, Akihiro;Matsui, Toshiyuki;
7:2:95:2:2     Effect of film thickness on structural and magnetic properties of single crystalline Ba(Fe0.2Zr0.8)O3-delta thin films on (001)SrTiO3 substrates
DOI:10.1063/1.3360208  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Kanatani, H.;Matsui, T.;Hirao, N.;Yamamoto, H.;Baba, Y.;Kume, H.;Iwase, A.;
7:2:95:2:3     Magnetic and structural properties of Ba(Co1-xMnx)O-3 using synchrotron x-ray spectroscopy
DOI:10.1063/1.4904851  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Shinoda, Ryoichi;Iwase, Akihiro;Matsui, Toshiyuki;
7:2:95:2:4     Magnetic Compton scattering studies of magneto-dielectric Ba(Co0.85Mn0.15)O3-delta
DOI:10.1063/1.4799476  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Shinoda, R.;Itou, M.;Sakurai, Y.;Yamamoto, H.;Hirao, N.;Baba, Y.;Iwase, A.;Matsui, T.;
7:2:95:2:5     Effect of Doping for Epitaxial (Ba1-xYbx)(Fe0.2Zr0.8)O3-delta Thin Films with Yb
DOI:10.2320/matertrans.M2014194  JN:MATERIALS TRANSACTIONS  PY:2014
  TC:1  AU: Shinoda, Ryoichi;Hirao, Norie;Baba, Yuji;Iwase, Akihiro;Matsui, Toshiyuki;
7:2:95:3:1     Influence of GdFeO3 addition on the physical properties of NaKNbO3 lead free ferroelectric ceramics
DOI:10.1016/j.matlet.2011.05.078  JN:MATERIALS LETTERS  PY:2011
  TC:2  AU: Rai, Radheshyam;Sharma, Seema;Rani, Rashmi;Valente, M. A.;Kholkin, Andrei L.;
7:2:95:3:2     Hardness, isomer shifts and chemical bond properties of rare earth orthoferrites
DOI:10.1016/j.jallcom.2011.03.169  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:1  AU: Hou, Li;Gao, Faming;Gao, Lihua;
7:2:96:1     Dipole spring ferroelectrics in superlattice SrTiO3/BaTiO3 thin films exhibiting constricted hysteresis loops
DOI:10.1063/1.3691172  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Wu, Pingping;Ma, Xingqiao;Li, Yulan;Gopalan, Venkatraman;Chen, Long-Qing;
7:2:96:2     Effect of grain boundary on the electromechanical response of ferroelectric polycrystals
DOI:10.1063/1.4752269  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Shu, Weilin;Wang, Jie;Zhang, Tong-Yi;
7:2:96:3     Effect of dislocation walls on the polarization switching of a ferroelectric single crystal
DOI:10.1063/1.4809945  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Wu, H. H.;Wang, J.;Cao, S. G.;Zhang, T. Y.;
7:2:96:4     Domain Wall Motion for Slowly Varying Electric Field
DOI:10.1080/00150193.2013.773852  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Starkov, A.;Starkov, I.;
7:2:96:5     Oxygen-vacancy-induced memory effect and large recoverable strain in a barium titanate single crystal
DOI:10.1103/PhysRevB.82.064103  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Zhang, Yihui;Li, Jiangyu;Fang, Daining;
7:2:96:6     Role of grain orientation distribution in the ferroelectric and ferroelastic domain switching of ferroelectric polycrystals
DOI:10.1016/j.actamat.2013.06.044  JN:ACTA MATERIALIA  PY:2013
  TC:4  AU: Wang, J.;Shu, W.;Shimada, T.;Kitamura, T.;Zhang, T. -Y.;
7:2:96:7     Domains and Switching in Ferroelectricity
DOI:10.1080/00150193.2012.671672  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Fridkin, V. M.;
7:2:96:8     Micro-/macro-responses of a ferroelectric single crystal with domain pinning and depinning by dislocations
DOI:10.1063/1.4826532  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Wu, H. H.;Wang, J.;Cao, S. G.;Chen, L. Q.;Zhang, T. Y.;
7:2:96:9     Domain Wall Motion for Slowly Varying Electric Field (Vol 442, pg 1, 2013)
DOI:10.1080/00150193.2013.812860  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Starkov, A.;Starkov, I.;
7:2:97:1     Non-180 degrees polarization rotation of ferroelectric (Bi0.5Na0.5)TiO3 single crystals under electric field
DOI:10.1103/PhysRevB.89.104104  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Kitanaka, Yuuki;Yanai, Ken;Noguchi, Yuji;Miyayama, Masaru;Kagawa, Yutaka;Moriyoshi, Chikako;Kuroiwa, Yoshihiro;
7:2:97:2     Oxygen-vacancy-induced 90 degrees-domain clamping in ferroelectric Bi4Ti3O12 single crystals
DOI:10.1103/PhysRevB.81.094114  JN:PHYSICAL REVIEW B  PY:2010
  TC:27  AU: Kitanaka, Yuuki;Noguchi, Yuji;Miyayama, Masaru;
7:2:97:3     High-Performance Ferroelectric Bi0.5Na0.5TiO3 Single Crystals Grown by Top-Seeded Solution Growth Method under High-Pressure Oxygen Atmosphere
DOI:10.1080/00150193.2011.577291  JN:FERROELECTRICS  PY:2011
  TC:8  AU: Kitanaka, Yuuki;Onozuka, Hiroaki;Noguchi, Yuji;Miyayama, Masaru;
7:2:97:4     Oxygen-vacancy effect on structural, magnetic, and ferroelectric properties in multiferroic YMnO3 single crystals
DOI:10.1063/1.3676000  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Chen, D. P.;Du, Y.;Wang, X. L.;Cheng, Z. X.;Dou, S. X.;Lin, Z. W.;Zhu, J. G.;Xu, B.;
7:2:97:5     On preferred Mn site in multiferroic BiFeO3: A view by synchrotron x-ray absorption near edge structure spectroscopy
DOI:10.1063/1.4895474  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Jutimoosik, Jaru;Hunpratub, Sitchai;Maensiri, Santi;Rujirawat, Saroj;Yimnirun, Rattikorn;
7:2:97:6     Electronic and local structures of Mn-doped BiFeO3 crystals
DOI:10.1103/PhysRevB.86.184112  JN:PHYSICAL REVIEW B  PY:2012
  TC:28  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;Unusual temperature dependence of the spectral weight near the Fermi;level of NdNiO3 thin films;PHYSICAL REVIEW B;86;19;195147;10.1103/PhysRevB.86.195147;NOV 30 2012;2012;We investigate the behavior of the spectral weight near the Fermi level;of NdNiO3 thin films as a function of temperature across the;metal-to-insulator transition (MIT) by means of ultraviolet;photoelectron spectroscopy. The spectral weight was found to exhibit;thermal hysteresis, similar to that of the dc conductivity. A detailed;analysis of the temperature dependence reveals two distinct regimes of;spectral loss close to the Fermi level. The temperature evolution of one;regime is found to be independent of the MIT.;Garcia-Fernandez, Mirian/B-6018-2013; Zubko, Pavlo/B-5496-2009;Zubko, Pavlo/0000-0002-7330-3163;2;0;0;0;2;1098-0121;WOS:000311715000006;;;J;Sen, Arnab;Damle, Kedar;Moessner, R.;Vacancy-induced spin textures and their interactions in a classical spin;liquid;PHYSICAL REVIEW B;86;20;205134;10.1103/PhysRevB.86.205134;NOV 30 2012;2012;Motivated by experiments on the archetypal frustrated magnet;SrCr9pGa12-9pO19 (SCGO), we study the classical Heisenberg model on the;pyrochlore slab (kagome bilayer) lattice with site dilution x = 1 - p.;This allows us to address generic aspects of the physics of nonmagnetic;vacancies in a classical spin liquid. We explicitly demonstrate that the;pure (x = 0) system remains a spin liquid down to the lowest;temperatures, with an unusual nonmonotonic temperature dependence of the;susceptibility, which even turns diamagnetic for the apical spins;between the two kagome layers. For x > 0 but small, the low-temperature;magnetic response of the system is most naturally described in terms of;the properties of spatially extended spin textures that cloak an;"orphan" S = 3/2 Cr3+ spin in direct proximity to a pair of missing;sites belonging to the same triangular simplex. In the T -> 0 limit,;these orphan-texture complexes each carry a net magnetization that is;exactly half the magnetic moment of an individual spin of the undiluted;system. Furthermore, we demonstrate that they interact via an entropic;temperature-dependent pairwise exchange interaction J(eff) (T,(r) over;right arrow) similar to T J ((r) over right arrow root T) that has a;logarithmic form at short distances and decays exponentially beyond a;thermal correlation length xi(T) similar to 1/root T. The sign of J(eff);depends on whether the two orphan spins belong to the same kagome layer;or not. We provide a detailed analytical account of these properties;using an effective field theory approach specifically tailored for the;problem at hand. These results are in quantitative agreement with;large-scale Monte Carlo numerics.;3;1;0;0;3;1098-0121;WOS:000311715100008;;;J;Solanki, Ravindra Singh;Mishra, S. K.;Senyshyn, Anatoliy;Ishii, I.;Moriyoshi, Chikako;Suzuki, Takashi;Kuroiwa, Yoshihiro;Pandey, Dhananjai;Antiferrodistortive phase transition in pseudorhombohedral;(Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and;neutron powder diffraction study;PHYSICAL REVIEW B;86;17;174117;10.1103/PhysRevB.86.174117;NOV 30 2012;2012;The controversies about the structure of the true ground state of;pseudorhombohedral compositions of Pb(ZrxTi1-x)O-3 (PZT) are addressed;using a 6% Sr2+ substituted sample with x = 0.550. Sound velocity;measurements reveal a phase transition at T-c similar to 279 K. The;temperature dependence of full width at half maximum of (h00)(pc) peaks;and the unit cell volume also show anomalies around 279 K even though;there is no indication of any change of space group in the synchrotron;x-ray powder diffraction (SXRD) patterns. The neutron powder diffraction;patterns reveal appearance of superlattice peaks below T-c similar to;279 K, confirming the existence of an antiferrodistortive phase;transition. The Rietveld analysis of the room-temperature and;low-temperature SXRD data below T-c shows that the structure corresponds;to single monoclinic phase in the Cm space group while the analysis of;neutron powder diffraction data reveals that the structure of the;ground-state phase below T-c corresponds to the Cc space group. Our;analysis shows that the structural models for the ground-state phase;based on the R3c space group with or without the coexistence of the;room-temperature monoclinic phase in the Cm space group can be rejected.;SOLANKI, RAVINDRA /H-7221-2013; Senyshyn, Anatoliy/C-8267-2014;Senyshyn, Anatoliy/0000-0002-1473-8992;3;0;0;0;3;1098-0121;WOS:000311714600001;;;J;Steinke, N. -J.;Moore, T. A.;Mansell, R.;Bland, J. A. C.;Barnes, C. H. W.;Nonuniversal dynamic magnetization reversal in the Barkhausen-dominated;and mesofrequency regimes;PHYSICAL REVIEW B;86;18;184434;10.1103/PhysRevB.86.184434;NOV 30 2012;2012;Dynamic magnetization reversal in the mesofrequency range is studied by;ac magneto-optical Kerr effect (ac-MOKE) and ac anisotropic;magnetoresistance (ac-AMR) magnetometry in a series of epitaxial and;polycrystalline thin magnetic films. The dynamic coercive field was;found to scale as a power law with scaling exponents <= 1/2 depending on;the ferromagnetic material. In addition, there is a low sweep rate;regime in which the dynamic coercivity reaches a minimum. These findings;are explained in the context of reversal proceeding by motion of a few;domain walls (similar to 1). At dc and low field sweep rates the;reversal proceeds between local pinning sites via Barkhausen avalanches;and the overall reversal speed is strongly dependent on the field sweep;rate. At higher field sweep rates a continuous motion regime is entered;in which the reversal velocity depends linearly on the applied field;sweep rate and only an average pinning force is experienced by the wall.;The fit of the dynamic coercivity vs applied field sweep rate allows the;determination of the average nonlocal pinning field. The nonuniversal;scaling exponent can be explained using recently developed models and;introducing a field rate-dependent number of active domain walls.;Mansell, Rhodri/A-1450-2013;2;0;0;0;2;1098-0121;WOS:000311714700003;;;J;Stoffel, M.;Fagot-Revurat, Y.;Tejeda, A.;Kierren, B.;Nicolaou, A.;Le Fevre, P.;Bertran, F.;Taleb-Ibrahimi, A.;Malterre, D.;Electron-phonon coupling on strained Ge/Si(111)-(5x5) surfaces;PHYSICAL REVIEW B;86;19;195438;10.1103/PhysRevB.86.195438;NOV 30 2012;2012;We investigate the structural and electronic properties of strained;Ge/Si(111)-(5 x 5) surfaces by means of scanning tunneling microscopy;and high-resolution angle-resolved photoemission spectroscopy. The;homogeneous (5 x 5) reconstructed overlayers are characterized by three;electronic surface states, similar to the Si(111)-(7 x 7) surface. The;dispersion of the dangling bond related surface state exhibits the same;periodicity as that of the (5 x 5) reconstruction. Moreover, a careful;analysis of the shape and width of this surface state provides striking;evidence of electron-phonon coupling at low temperatures. By considering;the spectral function within a simple Debye model, we determine both the;Debye energy and the electron-phonon coupling strength. The latter value;is further confirmed by analyzing the temperature-dependent phonon;broadening of the dangling bond related surface state linewidth.;BERTRAN, Francois/B-7515-2008; Tejeda, Antonio/C-4711-2014;BERTRAN, Francois/0000-0002-2416-0514; Tejeda,;Antonio/0000-0003-0125-4603;1;0;0;0;1;1098-0121;WOS:000311715000012;;;J;Turek, I.;Kudrnovsky, J.;Carva, K.;Magnetic anisotropy energy of disordered tetragonal Fe-Co systems from;ab initio alloy theory;PHYSICAL REVIEW B;86;17;174430;10.1103/PhysRevB.86.174430;NOV 30 2012;2012;We present results of systematic fully relativistic first-principles;calculations of the uniaxial magnetic anisotropy energy (MAE) of a;disordered and partially ordered tetragonal Fe-Co alloy using the;coherent potential approximation (CPA). This alloy has recently become a;promising system for thin ferromagnetic films with a perpendicular;magnetic anisotropy. We find that existing theoretical approaches to;homogeneous random bulk Fe-Co alloys, based on a simple virtual crystal;approximation (VCA), overestimate the maximum MAE values obtained in the;CPA by a factor of 4. This pronounced difference is ascribed to the;strong disorder in the minority spin channel of real alloys, which is;neglected in the VCA and which leads to a broadening of the d-like;eigenstates at the Fermi energy and to the reduction of the MAE. The;ordered Fe-Co alloys with a maximum L1(0)-like atomic long-range order;can exhibit high values of the MAE, which, however, get dramatically;reduced by small perturbations of the perfect order.;Carva, Karel/A-3703-2008; Turek, Ilja/G-5553-2014; KUDRNOVSKY, Josef/G-5581-2014;KUDRNOVSKY, Josef/0000-0002-9968-6748;10;0;0;0;10;1098-0121;WOS:000311714600004;;;J;Uppstu, Andreas;Harju, Ari;High-field magnetoresistance revealing scattering mechanisms in graphene;PHYSICAL REVIEW B;86;20;201409;10.1103/PhysRevB.86.201409;NOV 30 2012;2012;We show that the type of charge carrier scattering significantly affects;the high-field magnetoresistance of graphene nanoribbons. This effect;has the potential to be used in identifying the scattering mechanisms in;graphene. The results also provide an explanation for the experimentally;found, intriguing differences in the behavior of the magnetoresistance;of graphene Hall bars placed on different substrates. Additionally, our;simulations indicate that the peaks in the longitudinal resistance tend;to become pinned to fractionally quantized values, as different;transport modes have very different scattering properties.;Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;1;0;0;0;1;1098-0121;WOS:000311715100004;;;J;White, Alexander J.;Sukharev, Maxim;Galperin, Michael;Molecular nanoplasmonics: Self-consistent electrodynamics in;current-carrying junctions;PHYSICAL REVIEW B;86;20;205324;10.1103/PhysRevB.86.205324;NOV 30 2012;2012;We consider a biased molecular junction subjected to an external;time-dependent electromagnetic field. We discuss local field formation;due to both surface plasmon-polariton excitations in the contacts and;the molecular response. Employing realistic parameters we demonstrate;that such self-consistent treatment is crucial for the proper;description of the junction transport characteristics.;White, Alexander/D-8754-2014;White, Alexander/0000-0002-7771-3899;3;0;0;0;3;1098-0121;WOS:000311715100010;;;J;Wierschem, Keola;Kato, Yasuyuki;Nishida, Yusuke;Batista, Cristian D.;Sengupta, Pinaki;Magnetic and nematic orderings in spin-1 antiferromagnets with;single-ion anisotropy;PHYSICAL REVIEW B;86;20;201108;10.1103/PhysRevB.86.201108;NOV 30 2012;2012;We study a spin-1 Heisenberg model with exchange interaction J, uniaxial;single-ion exchange anisotropy D, and Zeeman coupling to a magnetic;field B parallel to the symmetry axis. We compute the (D/J, B/J) quantum;phase diagram for square and simple cubic lattices by combining;analytical and quantum Monte Carlo approaches, and find a transition;between XY antiferromagnetic and ferronematic phases that spontaneously;break the U(1) symmetry of the model. In the language of bosonic gases,;this is a transition between a Bose-Einstein condensate (BEC) of single;bosons and a BEC of pairs. Our work opens up new avenues for measuring;this transition in real magnets.;8;0;0;0;8;1098-0121;WOS:000311715100001;;;J;Wu, Chien-Te;Valls, Oriol T.;Halterman, Klaus;Proximity effects in conical-ferromagnet/superconductor bilayers;PHYSICAL REVIEW B;86;18;184517;10.1103/PhysRevB.86.184517;NOV 30 2012;2012;We present a study of various aspects of proximity effects in F/S;(ferromagnet/superconductor) bilayers, where F has a spiral magnetic;texture such as that found in holmium, erbium, and other materials, and;S is a conventional s-wave superconductor. We numerically solve the;Bogoliubov-de Gennes (BdG) equations self-consistently and use the;solutions to compute physical quantities relevant to the proximity;effects in these bilayers. We obtain the relation between the;superconducting transition temperature T-c and the thicknesses d(F) of;the magnetic layer by solving the linearized BdG equations. We find that;the T-c (d(F)) curves include multiple oscillations. Moreover, the;system may be reentrant not only with d(F), as is the case when the;magnet is uniform, but also with temperature T : the superconductivity;disappears in certain ranges of d(F) or T. The T reentrance reported;here occurs when d(F) is larger than the spatial period of the conical;exchange field. We compute the condensation free energies and entropies;from the full BdG equations and find the results are in agreement with;T-c values obtained by linearization. The inhomogeneous nature of the;magnet makes it possible for all odd triplet pairing components to be;induced. We have investigated their properties and found that, as;compared to the singlet amplitude, both the m = 0 and +/- 1 triplet;components exhibit long-range penetration. For nanoscale bilayers, the;proximity lengths for both layers are also obtained. These lengths;oscillate with d(F) and they are found to be long range on both sides.;These results are shown to be consistent with recent experiments. We;also calculate the reverse proximity effect described by the;three-dimensional local magnetization, and the local density of states,;which reveals important energy-resolved signatures associated with the;proximity effects.;6;0;0;0;6;1098-0121;WOS:000311714700005;;;J;Altarelli, M.;Kurta, R. P.;Vartanyants, I. A.;X-ray cross-correlation analysis and local symmetries of disordered;systems: General theory (vol 82, 104207, 2010);PHYSICAL REVIEW B;86;17;179904;10.1103/PhysRevB.86.179904;NOV 29 2012;2012;1;0;0;0;1;1098-0121;WOS:000311693600006;;;J;Beheshtian, J.;Sadeghi, A.;Neek-Amal, M.;Michel, K. H.;Peeters, F. M.;Induced polarization and electronic properties of carbon-doped boron;nitride nanoribbons;PHYSICAL REVIEW B;86;19;195433;10.1103/PhysRevB.86.195433;NOV 29 2012;2012;The electronic properties of boron nitride nanoribbons (BNNRs) doped;with a line of carbon atoms are investigated using density functional;calculations. By replacing a line of alternating B and N atoms with;carbons, three different configurations are possible depending on the;type of the atoms which bond to the carbons. We found very different;electronic properties for these configurations: (i) the NCB arrangement;is strongly polarized with a large dipole moment having an unexpected;direction, (ii) the BCB and NCN arrangements are nonpolar with zero;dipole moment, (iii) the doping by a carbon line reduces the band gap;regardless of the local arrangement of the borons and the nitrogens;around the carbon line, and (iv) the polarization and energy gap of the;carbon-doped BNNRs can be tuned by an electric field applied parallel to;the carbon line. Similar effects were found when either an armchair or;zigzag line of carbon was introduced.;Sadeghi, Ali/D-1554-2013;8;0;0;0;8;1098-0121;WOS:000311694200006;;;J;Chi, Hang;Kim, Hyoungchul;Thomas, John C.;Su, Xianli;Stackhouse, Stephen;Kaviany, Massoud;Van der Ven, Anton;Tang, Xinfeng;Uher, Ctirad;Configuring pnicogen rings in skutterudites for low phonon conductivity;PHYSICAL REVIEW B;86;19;195209;10.1103/PhysRevB.86.195209;NOV 29 2012;2012;Dominant heat-carrying modes in skutterudites are associated with;vibrations of the pnicogen rings. Apart from filling the structural;cages with foreign species, disrupting the pnicogen ring structure by;substitutional alloying should be an effective approach to reduce;thermal conductivity. In this paper we explore alloying configurations;of pnicogen rings (Sb rings in the case of CoSb3) that yield;particularly low values of the thermal conductivity. We find that IV-VI;double substitution (replacing two Sb atoms with one atom each from the;column IV and column VI elements to achieve an average charge of two Sb;atoms) is a very effective approach. Our ab initio calculations, in;combination with a cluster expansion, have allowed us to identify stable;alloy configurations on the Sb rings. Subsequent molecular and lattice;dynamics simulations on low energy configurations establish the range of;atomic displacement parameters and values of the thermal conductivity.;Theoretical results are in good agreement with our experimental thermal;conductivity values. Combining both approaches of compensated double;substitution and filling of structural cages should be an effective way;of improving the thermoelectric figure of merit of skutterudites.;Su, Xianli/A-9685-2012; Chi, Hang/F-1537-2011; Thomas, John/A-2764-2009; Kim, Hyoungchul/F-2557-2014;Chi, Hang/0000-0002-1299-1150; Thomas, John/0000-0002-3162-0152; Kim,;Hyoungchul/0000-0003-3109-660X;8;0;0;0;8;1098-0121;WOS:000311694200003;;;J;Fortmann, C.;Niemann, C.;Glenzer, S. H.;Theory of x-ray scattering in high-pressure electrides;PHYSICAL REVIEW B;86;17;174116;10.1103/PhysRevB.86.174116;NOV 29 2012;2012;We report on a theoretical model for the calculation of x-ray scattering;from high-pressure electrides. By treating interstitial electrons as;effective anions forming a sublattice within the crystal, we explicitly;account for Bragg reflections from the sublattice as well as for;scattering interferences between the ion lattice and the anion;sublattice. The additional reflections and interferences lead to;significant modifications of the static structure factor as compared to;the pure lattices. Our results are important for accurate calculations;of material properties in the high-pressure phase and allow for direct;experimental verification of electride phases in matter at ultrahigh;pressures through angle-resolved x-ray scattering.;2;0;0;0;2;1098-0121;WOS:000311693600001;;;J;Guclu, Caner;Campione, Salvatore;Capolino, Filippo;Hyperbolic metamaterial as super absorber for scattered fields generated;at its surface;PHYSICAL REVIEW B;86;20;205130;10.1103/PhysRevB.86.205130;NOV 29 2012;2012;We show that hyperbolic metamaterials (HMs) that exhibit hyperbolic;wave-vector dispersion diagrams possess two important features related;to super absorption: The total power scattered by a nanosphere is (i);greatly enhanced when placed at the HM surface, compared to other;material surfaces, and (ii) almost totally directed into the HM. We show;that these two features are peculiar of HM interfaces, and we support;them using a spectral theory study of transverse-electric and magnetic;waves scattered by a subwavelength nanosphere. We analyze the;nanosphere's scattered power absorbed by various substrate;configurations. We also consider various nanosphere materials.;22;0;0;0;22;1098-0121;WOS:000311694300002;;;J;Hebbache, M.;Entanglement of electron spins and geometric phases in the diamond color;center coupled to the P1 center;PHYSICAL REVIEW B;86;19;195316;10.1103/PhysRevB.86.195316;NOV 29 2012;2012;Impurity spins in semiconductors are potential quantum bits.;Entanglement and topological phases are key resources in quantum;computation. We prove that the coupled electron spins carried by a;diamond nitrogen-vacancy color center (NV-) and a single substitutional;nitrogen impurity (P1 center) are entangled in the immediate vicinity of;the level anticrossing that appears in the Zeeman energy diagram at;about 500 G. We also determine the Aharonov-Anandan, Berry, and marginal;geometric phases that can be accumulated by the state vectors of this;spin system when it is magnetically transported around a closed path. At;the resonance where the gap between two energy levels is minimum, the;geometric phases undergo discontinuities, and the entanglement of the;two electron spins is maximal.;2;0;0;0;2;1098-0121;WOS:000311694200004;;;J;Kerdsongpanya, Sit;Alling, Bjorn;Eklund, Per;Effect of point defects on the electronic density of states of ScN;studied by first-principles calculations and implications for;thermoelectric properties;PHYSICAL REVIEW B;86;19;195140;10.1103/PhysRevB.86.195140;NOV 29 2012;2012;We have investigated the effect of defects and impurities on the;electronic density of states of scandium nitride using first-principles;calculations with the generalized gradient approximation and hybrid;functionals for the exchange correlation energy. Our results show that;Sc and N vacancies can introduce asymmetric peaks in the density of;states close to the Fermi level. We also find that the N vacancy states;are sensitive to total electron concentration of the system due to their;possibility for spin polarization. Substitutional point defects shift;the Fermi level in the electronic band according to their valence but do;not introduce sharp features. The energetics and electronic structure of;defect pairs are also studied. By using hybrid functional calculations,;a correct description of the band gap of scandium nitride is obtained.;Our results envisage ways for improving the thermoelectric figure of;merit of ScN by electronic structure engineering through stoichiometry;tuning and doping.;Eklund, Per/B-7677-2011; Alling, Bjorn/I-3193-2012;Eklund, Per/0000-0003-1785-0864; Alling, Bjorn/0000-0001-5863-5605;8;0;0;0;8;1098-0121;WOS:000311694200001;;;J;Kim, Jiseok;Fischetti, Massimo V.;Aboud, Shela;Structural, electronic, and transport properties of silicane nanoribbons;PHYSICAL REVIEW B;86;20;205323;10.1103/PhysRevB.86.205323;NOV 29 2012;2012;Silicane ribbons do not suffer from aromatic dependence of the band gap;making them a more promising candidate for near-term nanoelectronic;application compared to armchair graphene nanoribbons. The structural,;electronic, and transport properties of free-standing sp(3)-hybridized;armchair- and zigzag-edge silicane nanoribbons have been investigated;using ab initio and nonlocal empirical pseudopotential calculations.;Under ambient conditions, two-dimensional silicane sheets will;spontaneously break into stable one-dimensional ribbons similar to;density functional theory studies of graphene ribbons. The calculated;low-field electron mobility and ballistic conductance show a strong edge;dependence, due to differences in the effective mass and momentum;relaxation rates along the two transport directions. The mobility in;zigzag-edge ribbons is found to be approximately twenty times higher;than in armchair-edge ribbons.;7;0;0;0;7;1098-0121;WOS:000311694300004;;;J;Kim, Kyou-Hyun;Payne, David A.;Zuo, Jian-Min;Symmetry of piezoelectric (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (x=0.31);single crystal at different length scales in the morphotropic phase;boundary region;PHYSICAL REVIEW B;86;18;184113;10.1103/PhysRevB.86.184113;NOV 29 2012;2012;We use probes of three different length scales to examine symmetry of (1;- x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) single crystals in the;morphotropic phase boundary (MPB) region at composition x = 0.31;(PMN-31% PT). On the macroscopic scale, x-ray diffraction (XRD) shows a;mixture of strong and weak diffraction peaks of different widths. The;closest match to XRD peak data is made with monoclinic Pm (M-C);symmetry. On the local scale of a few nanometers, convergent beam;electron diffraction (CBED) studies, with a 1.6-nm electron probe,;reveal no obvious symmetry. These CBED experimental patterns can be;approximately matched with simulations based on monoclinic symmetry,;which suggests locally distorted monoclinic structure. A monoclinic Cm;(M-A or M-B)-like symmetry could also be obtained from certain regions;of the crystal by using a larger electron probe size of several tens of;nanometers in diameter. Thus the monoclinic symmetry of single crystal;PMN-31% PT is developed only in parts of the crystal by averaging over;locally distorted structure on the scale of few tens of nanometers. The;macroscopic symmetry observed by XRD is a result of averaging from the;local structure in PMN-31% PT single crystal. The lack of local symmetry;at a few nanometers scale suggests that the polarization switching;results from a change in local displacements, which are not restricted;to specific symmetry planes or directions.;2;0;0;0;2;1098-0121;WOS:000311693900002;;;J;Kossacki, P.;Faugeras, C.;Kuehne, M.;Orlita, M.;Mahmood, A.;Dujardin, E.;Nair, R. R.;Geim, A. K.;Potemski, M.;Circular dichroism of magnetophonon resonance in doped graphene;PHYSICAL REVIEW B;86;20;205431;10.1103/PhysRevB.86.205431;NOV 29 2012;2012;The polarization-resolved Raman-scattering response due to E-2g phonons;in monolayer graphene has been investigated in magnetic fields up to 29;T. The hybridization of the E-2g phonon is only observed with the;fundamental inter-Landau-level excitation (involving the n = 0 Landau;level) and in just one of the two configurations of the circularly;cross-polarized excitation and scattered light. This polarization;anisotropy of the magnetophonon resonance is shown to be inherent to;relatively strongly doped graphene samples with carrier concentrations;typical for graphene deposited on Si/SiO2 substrates.;Dujardin, Erik/A-2748-2010; Raveendran Nair, Rahul/G-5839-2010; Orlita, Milan/H-1130-2014;Dujardin, Erik/0000-0001-7242-9250;;3;0;0;0;3;1098-0121;WOS:000311694300005;;;J;Kostylev, M.;Stashkevich, A. A.;Roussigne, Y.;Grigoryeva, N. A.;Mistonov, A. A.;Menzel, D.;Sapoletova, N. A.;Napolskii, K. S.;Eliseev, A. A.;Lukashin, A. V.;Grigoriev, S. V.;Samarin, S. N.;Microwave properties of Ni-based ferromagnetic inverse opals;PHYSICAL REVIEW B;86;18;184431;10.1103/PhysRevB.86.184431;NOV 29 2012;2012;Investigations of microwave properties of Ni-based inverse ferromagnetic;opal-like film with the [111] axis of the fcc structure along the normal;direction to the film have been carried out in the 2-18 GHz frequency;band. We observed multiple spin wave resonances for the magnetic field;applied perpendicular to the film, i.e., along the [111] axis of this;artificial crystal. For the field applied in the film plane, a broad;band of microwave absorption is observed, which does not contain a fine;structure. The field ranges of the responses observed are quite;different for these two magnetization directions. This suggests a;collective magnetic ground state or shape anisotropy and collective;microwave dynamics for this foam-like material. This result is in;agreement with SQUID measurements of hysteresis loops for the material.;Two different models for this collective behavior are suggested that;satisfactorily explain the major experimental results.;Lukashin, Alexey/F-6746-2013; Mistonov, Alexander/H-2098-2013; Grigoryeva, Natalia/K-2253-2013; Kostylev, Mikhail/H-5214-2014;Mistonov, Alexander/0000-0003-0138-3579; Grigoryeva,;Natalia/0000-0002-9910-6192;;1;0;0;0;1;1098-0121;WOS:000311693900004;;;J;Kvashnin, Y. O.;Khmelevskyi, S.;Kudrnovsky, J.;Yaresko, A. N.;Genovese, L.;Bruno, P.;Noncollinear magnetic ordering in compressed FePd3 ordered alloy: A;first principles study;PHYSICAL REVIEW B;86;17;174429;10.1103/PhysRevB.86.174429;NOV 29 2012;2012;By means of ab initio calculations based on the density functional;theory we investigated the magnetic phase diagram of ordered FePd3 alloy;as a function of external pressure. Considering several magnetic;configurations we concluded that the system under pressure has a;tendency toward noncollinear spin alignment. Analysis of the Heisenberg;exchange parameters J(ij) revealed strong dependence of iron-iron;magnetic couplings on polarization of Pd atoms. To take into account;that effect we built an extended Heisenberg model with higher order;(biquadratic) terms. Minimizing the energy of this Hamiltonian, fully;parametrized using the results of ab initio calculations, we found a;candidate for a ground state of compressed FePd3, which can be seen as;two interpenetrating "triple-Q" phases.;Genovese, Luigi/C-5937-2011; Bruno, Patrick/C-9159-2009; KUDRNOVSKY, Josef/G-5581-2014;Genovese, Luigi/0000-0003-1747-0247; Bruno, Patrick/0000-0002-2574-1943;;KUDRNOVSKY, Josef/0000-0002-9968-6748;1;0;0;0;1;1098-0121;WOS:000311693600004;;;J;Li, Wu;Lindsay, L.;Broido, D. A.;Stewart, Derek A.;Mingo, Natalio;Thermal conductivity of bulk and nanowire Mg2SixSn1-x alloys from first;principles;PHYSICAL REVIEW B;86;17;174307;10.1103/PhysRevB.86.174307;NOV 29 2012;2012;The lattice thermal conductivity (kappa) of the thermoelectric;materials, Mg2Si, Mg2Sn, and their alloys, are calculated for bulk and;nanowires, without adjustable parameters. We find good agreement with;bulk experimental results. For large nanowire diameters, size effects;are stronger for the alloy than for the pure compounds. For example, in;200 nm diameter nanowires kappa is lower than its bulk value by 30%,;20%, and 20% for Mg2Si0.6Sn0.4, Mg2Si, and Mg2Sn, respectively. For;nanowires less than 20 nm thick, the relative decrease surpasses 50%,;and it becomes larger in the pure compounds than in the alloy. At room;temperature, kappa of Mg2SixSn1-x is less sensitive to nanostructuring;size effects than SixGe1-x, but more sensitive than PbTexSe1-x. This;suggests that further improvement of Mg2SixSn1-x as a nontoxic;thermoelectric may be possible.;Lindsay, Lucas/C-9221-2012; Stewart, Derek/B-6115-2008;25;1;0;0;25;1098-0121;WOS:000311693600002;;;J;Niklasson, Anders M. N.;Cawkwell, Marc J.;Fast method for quantum mechanical molecular dynamics;PHYSICAL REVIEW B;86;17;174308;10.1103/PhysRevB.86.174308;NOV 29 2012;2012;As the processing power available for scientific computing grows,;first-principles Born-Oppenheimer molecular dynamics simulations are;becoming increasingly popular for the study of a wide range of problems;in materials science, chemistry, and biology. Nevertheless, the;computational cost of Born-Oppenheimer molecular dynamics still remains;prohibitively large for many potential applications. Here we show how to;avoid a major computational bottleneck: the self-consistent-field;optimization prior to force calculations. The optimization-free quantum;mechanical molecular dynamics method gives trajectories that are almost;indistinguishable from an "exact" microcanonical Born-Oppenheimer;molecular dynamics simulation even when low-prefactor linear scaling;sparse matrix algebra is used. Our findings show that the computational;gap between classical and quantum mechanical molecular dynamics;simulations can be significantly reduced.;4;0;0;0;4;1098-0121;WOS:000311693600003;;;J;Ong, Zhun-Yong;Fischetti, Massimo V.;Theory of interfacial plasmon-phonon scattering in supported graphene;(vol 86, 165422, 2012);PHYSICAL REVIEW B;86;19;199904;10.1103/PhysRevB.86.199904;NOV 29 2012;2012;Ong, Zhun-Yong/B-9486-2013;Ong, Zhun-Yong/0000-0003-2668-6453;6;0;0;0;6;1098-0121;WOS:000311694200007;;;J;Per, Manolo C.;Snook, Ian K.;Russo, Salvy P.;Efficient calculation of unbiased expectation values in diffusion;quantum Monte Carlo;PHYSICAL REVIEW B;86;20;201107;10.1103/PhysRevB.86.201107;NOV 29 2012;2012;Despite the proven utility of quantum Monte Carlo methods in addressing;the quantum many-body problem, many important observables are difficult;to calculate due to the presence of large, and sometimes divergent,;statistical errors. The present state of the art allows the construction;of renormalized estimators which result in finite variances, but which;invariably include some systematic bias. We present a simple method for;calculating unbiased expectation values of local operators in the;diffusion quantum Monte Carlo method which is applicable to both bare;and renormalized estimators, allowing the accurate calculation of;important properties such as forces.;snook, ian/A-3427-2009; Per, Manolo/C-3680-2011;1;0;0;0;1;1098-0121;WOS:000311694300001;;;J;Simonson, J. W.;Smith, G. J.;Post, K.;Pezzoli, M.;Kistner-Morris, J. J.;McNally, D. E.;Hassinger, J. E.;Nelson, C. S.;Kotliar, G.;Basov, D. N.;Aronson, M. C.;Magnetic and structural phase diagram of CaMn2Sb2;PHYSICAL REVIEW B;86;18;184430;10.1103/PhysRevB.86.184430;NOV 29 2012;2012;On the basis of magnetic, transport, and optical measurements performed;on single crystals, we report CaMn2Sb2 to be an antiferromagnetic;insulator that exhibits weak ferromagnetic order above the Neel;temperature. Magnetic susceptibility measurements reveal the magnitude;of the high-temperature Curie-Weiss moment to be only half as large as;the ground-state ordered moment, while electronic-structure calculations;based on crystallographic measurements suggest a crystal-field-induced;spin-state transition does not occur. The antiferromagnetic state is;relatively insensitive to both doping and modest pressures, while the;ferromagnetism can be readily tuned by either. Infrared transmission and;pressure-dependent resistivity measurements suggest proximity to an;electronic delocalization transition. We suggest the ferromagnetic state;may be the signature of magnetic polarons.;1;1;0;0;1;1098-0121;WOS:000311693900003;;;J;Stishov, Sergei M.;Petrova, Alla E.;Sidorov, Vladimir A.;Menzel, Dirk;Self-doping effects in cobalt silicide CoSi: Electrical, magnetic,;elastic, and thermodynamic properties (vol 86, 064433, 2012);PHYSICAL REVIEW B;86;17;179903;10.1103/PhysRevB.86.179903;NOV 29 2012;2012;0;0;0;0;0;1098-0121;WOS:000311693600005;;;J;Thede, M.;Xiao, F.;Baines, Ch.;Landee, C.;Morenzoni, E.;Zheludev, A.;Ordering in weakly coupled random singlet spin chains;PHYSICAL REVIEW B;86;18;180407;10.1103/PhysRevB.86.180407;NOV 29 2012;2012;The influence of bond randomness on long-range magnetic ordering in the;weakly coupled S = 1/2 antiferromagnetic spin chain materials;Cu(py)(2)(Cl1-xBrx)(2) is studied by muon spin rotation and bulk;measurements. Disorder is found to have a strong effect on the ordering;temperature T-N, and an even stronger one on the saturation;magnetization m(0), but considerably more so in the effectively;lower-dimensional Br-rich materials. The observed behavior is attributed;to random singlet ground states of individual spin chains, but remains;in contradiction with chain mean-field theory [Joshi and Yang, Phys.;Rev. B 67, 174403 (2003)] predictions. In this context, we discuss the;possibility of a universal distribution of ordered moments in the weakly;coupled random singlet chains model.;Thede, Matthias/L-2975-2013;4;0;0;0;4;1098-0121;WOS:000311693900001;;;J;Usov, V.;Stoyanov, S.;Coileain, C. O.;Toktarbaiuly, O.;Shvets, I. V.;Antiband instability on vicinal Si(111) under the condition of;diffusion-limited sublimation;PHYSICAL REVIEW B;86;19;195317;10.1103/PhysRevB.86.195317;NOV 29 2012;2012;In this paper, we investigate the antiband instability on vicinal;Si(111) surfaces with different angles of misorientation. It is known;that prolonged direct current-annealing of Si(111) results in the;formation of antibands; i.e., the step bunches with the opposite slope;to the primary bunches. We provide a theoretical description of antiband;formation via the evolution of the atomic steps' shape. We also derive a;criterion for the onset of the antiband instability under the conditions;of sublimation controlled by slow adatom surface diffusion. We examine;this criterion experimentally by studying the initial stage of the;antiband formation at a constant temperature of 1270 degrees C while;systematically varying the applied electromigration field. The;experiment strongly supports the validity of the derived theoretical;criterion and indicates the importance of accounting for the factor of;critical field in the theoretical modeling of step bunching or antiband;instabilities. Deduced from the comparison of theory and experiment, the;Si surface atoms' effective charge cannot exceed double the elementary;charge, set by the lower limit of kinetic characteristic length d(s) =;0.3 nm. Using d(s) = 1.7 - 4.5 nm draws values of the effective charge;in line with the values reported in earlier studies.;Shvets, Igor/J-8710-2013;0;0;0;0;0;1098-0121;WOS:000311694200005;;;J;Weber, Cedric;Mila, Frederic;Anticollinear magnetic order induced by impurities in the frustrated;Heisenberg model of pnictides;PHYSICAL REVIEW B;86;18;184432;10.1103/PhysRevB.86.184432;NOV 29 2012;2012;We present Monte Carlo simulations for a classical antiferromagnetic;Heisenberg model with both nearest (J(1)) and next-nearest (J(2));exchange couplings on the square lattice in the presence of nonmagnetic;impurities. We show that the order-by-disorder entropy selection,;associated with the Ising-like phase transition that appears for;J(2)/J(1) > 1/2 in the pure spin model, is quenched at low temperature;due to the presence of nonmagnetic impurities. Evidence that a new;competing order is stabilized around the impurities and in turn induces;a reentrance phase transition is reported. Implications for local;magnetic measurement of the parent compound of iron pnictides are;briefly discussed.;Weber, Cedric/D-5027-2014;Weber, Cedric/0000-0002-6989-2700;4;0;0;0;4;1098-0121;WOS:000311693900005;;;J;Weston, L.;Cui, X. Y.;Delley, B.;Stampfl, C.;Band offsets and polarization effects in wurtzite ZnO/Mg0.25Zn0.75O;superlattices from first principles;PHYSICAL REVIEW B;86;20;205322;10.1103/PhysRevB.86.205322;NOV 29 2012;2012;Using first-principles calculations, we investigate the band offsets,;built-in electric fields, and band gaps of (0001)-oriented wurtzite;ZnO/Mg0.25Zn0.75O superlattices, including the dependence on;superlattice geometry and strain. Significant built-in electric fields;form inside the quantum-well region that are found to be tunable over;the range 0.24 MV/cm <= E-w <= 0.63 MV/cm, and potentially up to 1MV/cm;by varying the relative width of the well and barrier regions. The;valence band offset at the ZnO/Mg0.25Zn0.75O interface is calculated to;be 0.25-0.26 eV which, in contrast to the "common anion rule," is a;significant portion of the total band offset, and this is in support of;recent experiment. Calculated values for the valence band offset were;found to be insensitive to variations in superlattice geometry and;strain. The band gap of the superlattice is determined by the competing;effects of quantum confinement and the quantum-confined Stark effect,;with the former being more dominant for the systems investigated. These;findings will be useful in the design and optimization of ZnO/MgxZn1-xO;superlattices for electronics and optoelectronics applications.;Delley, Bernard/E-1336-2014;Delley, Bernard/0000-0002-7020-2869;3;0;1;0;4;1098-0121;WOS:000311694300003;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;PHYSICAL REVIEW B;86;19;195141;10.1103/PhysRevB.86.195141;NOV 29 2012;2012;We perform realistic first-principles calculations of iron chalcogenides;and ruthenate-based materials to identify experimental signatures of;Hund's-coupling-induced correlations in these systems. We find that FeTe;and KxFe2-yAs2 display unusual orbital-dependent fractional power-law;behavior in their quasiparticle self-energy and optical conductivity, a;phenomenon first identified in SrRuO3. Strong incoherence in the;paramagnetic state of these materials results in electronic states;hidden to angle-resolved photoemission spectroscopy which reemerge at;low temperatures. We identify the effective low-energy Hamiltonian;describing these systems and show that these anomalies are not;controlled by the proximity to a quantum critical point but result from;coexistence of fast quantum mechanical orbital fluctuations and slow;spin fluctuations.;Yin, Zhiping/G-3949-2012;Yin, Zhiping/0000-0001-8679-5251;10;0;0;0;10;1098-0121;WOS:000311694200002;;;J;Kumar, A.;Fennie, C. J.;Rabe, K. M.;Spin-lattice coupling and phonon dispersion of CdCr2O4 from first;principles;PHYSICAL REVIEW B;86;18;184429;10.1103/PhysRevB.86.184429;NOV 28 2012;2012;First-principles calculations are used to investigate the effects of;magnetic ordering on the minimum-energy structure and on the full phonon;dispersion relation of CdCr2O4, focusing on the changes through the;coupled magnetic/structural transition which shows relief of the;geometric frustration of the antiferromagnetic ordering on the;pyrochlore lattice. We computed the full phonon dispersion relations for;the ferromagnetic and antiferromagnetic orderings in cubic and;tetragonal structures of CdCr2O4. We extracted the phonon dispersion for;the cubic paramagnetic phase and found that it compares wellwith the;experimental results. The AFM ordering is seen to lower the symmetry and;induce a lattice distortion comparable in magnitude to that observed in;the transition. While the spin-phonon couplings are large for modes;which involve displacement of the Cr atoms, there are no unstable modes;at any point in the Brillouin zone for either of the magnetic orderings;considered, and thus we conclude that the phase transition is driven not;by spin-phonon coupling, but by the atomic forces and stresses induced;by the magnetic order. Finally, by comparison of the phonon frequencies;for structures with different magnetic orderings and structural;distortions, we find that the spin-phonon coupling, rather than the;coupling of the phonons to the structural change, is the dominant factor;in the observed changes of phonon frequencies through the phase;transition.;Kumar, Anil/A-9834-2013;Kumar, Anil/0000-0002-4901-8987;1;0;0;0;1;1098-0121;WOS:000311604700002;;;J;Lin, Shi-Zeng;Bulaevskii, Lev N.;Batista, Cristian D.;Vortex dynamics in ferromagnetic superconductors: Vortex clusters,;domain walls, and enhanced viscosity;PHYSICAL REVIEW B;86;18;180506;10.1103/PhysRevB.86.180506;NOV 28 2012;2012;We demonstrate that there is a long-range vortex-vortex attraction in;ferromagnetic superconductors due to polarization of the magnetic;moments. Vortex clusters are then stabilized in the ground state for low;vortex densities. The motion of vortex clusters driven by the Lorentz;force excites magnons. This regime becomes unstable at a threshold;velocity above which domain walls are generated for slow relaxation of;the magnetic moments and the vortex configuration becomes modulated.;This dynamics of vortices and magnetic moments can be probed by;transport measurements.;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;6;0;0;0;6;1098-0121;WOS:000311604700001;;;J;Wong, Chris L. M.;Law, K. T.;Majorana Kramers doublets in dx2-y2-wave superconductors with Rashba;spin-orbit coupling;PHYSICAL REVIEW B;86;18;184516;10.1103/PhysRevB.86.184516;NOV 28 2012;2012;In this work, we show that a quasi-one-dimensional d(x2-y2)-wave;superconductor with Rashba spin-orbit coupling is a DIII class,;time-reversal invariant, topological superconductor (TS), which supports;a Majorana Kramers Doublet (MKD) at each end of the TS. A MKD is a pair;of Majorana end states (MESs) protected by time-reversal symmetry (TRS).;An external magnetic field breaks TRS and drives the system from DIII to;D class in which case a single MES appears at each end of the TS. We;show that a MKD induces resonant Andreev reflection with zero-bias;conductance peak of 4e(2)/h. Experimental realizations of the proposed;model are discussed.;Law, Kam/H-1410-2011;19;1;0;0;19;1098-0121;WOS:000311604700003;;;J;De Luca, M.;Pettinari, G.;Ciatto, G.;Amidani, L.;Filippone, F.;Polimeni, A.;Fonda, E.;Boscherini, F.;Bonapasta, A. Amore;Giubertoni, D.;Knuebel, A.;Lebedev, V.;Capizzi, M.;Identification of four-hydrogen complexes in In-rich InxGa1-xN (x > 0.4);alloys using photoluminescence, x-ray absorption, and density functional;theory;PHYSICAL REVIEW B;86;20;201202;10.1103/PhysRevB.86.201202;NOV 28 2012;2012;Postgrowth hydrogen incorporation in In-rich InxGa1-xN (x > 0.4) alloys;strongly modifies the optical and structural properties of the material:;A large blueshift of the emission and absorption energies is accompanied;by a remarkable broadening of the interatomic-distance distribution, as;probed by synchrotron radiation techniques. Both effects vanish at a;finite In-concentration value (x similar to 0.5). Synergic x-ray;absorption measurements and first-principle calculations unveil two;different defective species forming upon hydrogenation: one due to the;high chemical reactivity of H, the other ascribed to mere lattice;damage. In the former species, four H atoms bind to as many N atoms, all;nearest-neighbors of a same In atom. The stability of this peculiar;complex, which is predicted to behave as a donor, stems from atomic;displacements cooperating to reduce local strain.;Fonda, Emiliano/D-9666-2011; Filippone, Francesco/I-4718-2012; Pettinari, Giorgio/M-8678-2014;Filippone, Francesco/0000-0001-5862-1115; Pettinari,;Giorgio/0000-0003-0187-3770;1;0;0;0;1;1098-0121;WOS:000311605000001;;;J;Grytsyuk, Sergiy;Peskov, Maxim V.;Schwingenschloegl, Udo;First-principles modeling of interfaces between solids with large;lattice mismatch: The prototypical CoO(111)/Ni(111) interface;PHYSICAL REVIEW B;86;17;174115;10.1103/PhysRevB.86.174115;NOV 28 2012;2012;In this work we investigate the CoO(111)/Ni(111) interface by;first-principles calculations, focusing on its structure and stability.;To satisfy the approximate 5:6 ratio of the CoO and Ni lattice;constants, we construct a supercell with 5 x 5 Co (O) and 6 x 6 Ni atoms;per layer in the bulk regions. For the interface Ni layer and the;adjacent Ni layer we consider different configurations and study the;binding energy. We show for an ideal CoO interface terminated by 5 x 5 O;atoms that the structure is more stable if there are 5 x 5 Ni atoms next;to it instead of 6 x 6 as in the bulk. In addition, we observe that a;transition layer with 31 or 33 Ni atoms located between the interface 5;x 5 Ni and bulk 6 x 6 Ni layers (which partially reflects the structures;of both these layers) enhances the stability of the CoO/Ni interface.;The electronic and magnetic modifications induced by the interface;formation are discussed.;3;0;0;0;3;1098-0121;WOS:000311604400001;;;J;Luekermann, D.;Sologub, S.;Pfnuer, H.;Klein, C.;Horn-von Hoegen, M.;Tegenkamp, C.;Scattering at magnetic and nonmagnetic impurities on surfaces with;strong spin-orbit coupling;PHYSICAL REVIEW B;86;19;195432;10.1103/PhysRevB.86.195432;NOV 28 2012;2012;Adsorption-induced reduction of surface-state conductivity in epitaxial;Bi(111) films, a prototype system with large Rashba-induced;surface-state splitting, by adsorbed atoms of Bi, Fe, and Co has been;investigated by macroscopic surface magnetotransport measurements at a;temperature of 10 K. A detailed analysis of magnetotransport, dc;transport, and Hall data reveals that the scattering efficiencies for Co;and Fe are larger by a factor of 2 than that for Bi. While for the;latter charge transfer and change of band filling near the Fermi level;are negligible, we find an increase of hole concentration upon Co and Fe;adsorption. These atoms act as acceptors and immobilize on average about;0.5 electrons per adsorbed atom. Besides the dominant classical;magnetoconductance signal the films show signatures of weak;antilocalization, reflecting the strong spin-orbit coupling in Bi(111);surface states. This behavior can be changed to weak localization by the;adsorption of high concentrations (0.1 monolayers) of magnetic;impurities (Fe, Co), similarly to results found on the topological;insulator Bi2Se3. Our results demonstrate that details of chemical bond;formation for impurities are crucial for local spin moments and;electronic scattering properties.;5;0;0;0;5;1098-0121;WOS:000311604900001;;;J;Molina-Sanchez, A.;Garcia-Cristobal, A.;Bester, G.;Semiempirical pseudopotential approach for nitride-based nanostructures;and ab initio based passivation of free surfaces;PHYSICAL REVIEW B;86;20;205430;10.1103/PhysRevB.86.205430;NOV 28 2012;2012;We present a semiempirical pseudopotential method based on screened;atomic pseudopotentials and derived from ab initio calculations. This;approach is motivated by the demand for pseudopotentials able to address;nanostructures, where ab initio methods are both too costly and;insufficiently accurate at the level of the local density approximation,;while mesoscopic effective-mass approaches are inapplicable due to the;small size of the structures along, at least, one dimension. In this;work, we improve the traditional pseudopotential method by a two-step;process: First, we invert a set of self-consistently determined screened;ab initio potentials in wurtzite GaN for a range of unit-cell volumes,;thus determining spherically symmetric and structurally averaged atomic;potentials. Second, we adjust the potentials to reproduce observed;excitation energies. We find that the adjustment represents a reasonably;small perturbation over the potential, so that the ensuing potential;still reproduces the original wave functions, while the excitation;energies are significantly improved. We furthermore deal with the;passivation of the dangling bonds of free surfaces which is relevant for;the study of nanowires and colloidal nanoparticles. We present a;methodology to derive passivant pseudopotentials from ab initio;calculations. We apply our pseudopotential approach to the exploration;of the confinement effects on the electronic structure of GaN nanowires.;Bester, Gabriel/I-4414-2012;Bester, Gabriel/0000-0003-2304-0817;1;0;0;0;1;1098-0121;WOS:000311605000005;;;J;Patel, Aavishkar A.;Dutta, Amit;Sudden quenching in the Kitaev honeycomb model: Study of defect and heat;generation;PHYSICAL REVIEW B;86;17;174306;10.1103/PhysRevB.86.174306;NOV 28 2012;2012;We study the behavior of the defect and heat densities under sudden;quenching near the quantum critical points in the two-dimensional Kitaev;honeycomb model both in the thermodynamic and nonthermodynamic limits.;We consider quenches starting from a quantum critical point into the;gapped as well as the gapless phases. We choose points on the lines of;anisotropic quantum critical points as well as different points of;intersection of these lines as the initial points from where the;quenching starts. We find that the defect and heat densities display the;expected power-law scalings along with logarithmic corrections to;scaling (or cusp singularities) in certain cases. In the vicinity of;some of the intersection points, the scaling behaviors change,;indicating an effective dimensional reduction; the scaling behavior near;these points depends on the number of critical lines crossed in the;process of quenching. All the analytical predictions are also verified;by numerical integration.;1;0;0;0;1;1098-0121;WOS:000311604400002;;;J;Raith, Martin;Stano, Peter;Fabian, Jaroslav;Theory of spin relaxation in two-electron laterally coupled Si/SiGe;quantum dots;PHYSICAL REVIEW B;86;20;205321;10.1103/PhysRevB.86.205321;NOV 28 2012;2012;Highly accurate numerical results of phonon-induced two-electron spin;relaxation in silicon double quantum dots are presented. The relaxation,;enabled by spin-orbit coupling and the nuclei of Si-29 (natural or;purified abundance), is investigated for experimentally relevant;parameters, the interdot coupling, the magnetic field magnitude and;orientation, and the detuning. We calculate relaxation rates for zero;and finite temperatures (100 mK), concluding that our findings for zero;temperature remain qualitatively valid also for 100 mK. We confirm the;same anisotropic switch of the axis of prolonged spin lifetime with;varying detuning as recently predicted in GaAs. Conditions for possibly;hyperfine-dominated relaxation are much more stringent in Si than in;GaAs. For experimentally relevant regimes, the spin-orbit coupling,;although weak, is the dominant contribution, yielding anisotropic;relaxation rates of at least two orders of magnitude lower than in GaAs.;Raith, Martin/A-3357-2011; Stano, Peter/C-3016-2013; Fabian, Jaroslav/K-1700-2013;Fabian, Jaroslav/0000-0002-3009-4525;6;0;0;0;6;1098-0121;WOS:000311605000004;;;J;Romhanyi, Judit;Penc, Karlo;Multiboson spin-wave theory for Ba2CoGe2O7: A spin-3/2 easy-plane Neel;antiferromagnet with strong single-ion anisotropy;PHYSICAL REVIEW B;86;17;174428;10.1103/PhysRevB.86.174428;NOV 28 2012;2012;We consider the square-lattice antiferromagnetic Heisenberg Hamiltonian;extended with a single-ion axial anisotropy term as a minimal model for;the multiferroic Ba2CoGe2O7. Developing a multiboson spin-wave theory,;we investigate the dispersion of the spin excitations in this spin-3/2;system. As a consequence of a strong single-ion anisotropy, a stretching;(longitudinal) spin mode appears in the spectrum. The inelastic neutron;scattering spectra of Zheludev et al. [Phys. Rev. B 68, 024428 (2003)];are successfully reproduced by the low energy modes in the multiboson;spin-wave theory, and we anticipate the appearance of the spin;stretching modes at approximate to 4 meV that can be identified using;the calculated dynamical spin structure factors. We expect the;appearance of spin stretching modes for any S > 1/2 compound where the;single-ion anisotropy is significant.;Penc, Karlo/A-3092-2011;Penc, Karlo/0000-0002-2197-1370;5;1;0;0;5;1098-0121;WOS:000311604400004;;;J;Sarmadian, N.;Saniz, R.;Lamoen, D.;Partoens, B.;Influence of Al concentration on the optoelectronic properties of;Al-doped MgO;PHYSICAL REVIEW B;86;20;205129;10.1103/PhysRevB.86.205129;NOV 28 2012;2012;We use density functional theory within the local density approximation;to investigate the structural, electronic, and optical properties of;Al-doped MgO. The concentrations considered range from 6% to 56%. In the;latter case, we also compare the optical properties of the amorphous and;crystalline phases. We find that, overall, the electronic properties of;the crystalline phases change qualitatively little with Al;concentration. On the other hand, the changes in the electronic;structure in the amorphous phase are more important, most notably;because of deep impurity levels in the band gap that are absent in the;crystalline phase. This leads to observable effects in, e.g., the;optical absorption edge and in the refractive index. Thus, the latter;can be used to characterize the crystalline to amorphous transition with;Al doping level.;0;0;0;0;0;1098-0121;WOS:000311605000003;;;J;Smadici, S.;Nelson-Cheeseman, B. B.;Bhattacharya, A.;Abbamonte, P.;Interface ferromagnetism in a SrMnO3/LaMnO3 superlattice;PHYSICAL REVIEW B;86;17;174427;10.1103/PhysRevB.86.174427;NOV 28 2012;2012;Resonant soft x-ray absorption measurements at the O K edge on a;SrMnO3/LaMnO3 superlattice show a shoulder at the energy of doped holes,;which corresponds to the main peak of resonant scattering from the;modulation in the doped hole density. Scattering line shape at the Mn;L-3,L-2 edges has a strong variation below the ferromagnetic transition;temperature. This variation has a period equal to half the superlattice;superperiod and follows the development of the ferromagnetic moment,;pointing to a ferromagnetic phase developing at the interfaces. It;occurs at the resonant energies for Mn3+ and Mn4+ valences. A model for;these observations is presented, which includes a double-exchange;two-site orbital and the variation with temperature of the hopping;frequency t(ij) between the two sites.;Bhattacharya, Anand/G-1645-2011;Bhattacharya, Anand/0000-0002-6839-6860;1;0;0;0;1;1098-0121;WOS:000311604400003;;;J;Zanotto, Simone;Degl'Innocenti, Riccardo;Xu, Ji-Hua;Sorba, Lucia;Tredicucci, Alessandro;Biasiol, Giorgio;Ultrafast optical bleaching of intersubband cavity polaritons;PHYSICAL REVIEW B;86;20;201302;10.1103/PhysRevB.86.201302;NOV 28 2012;2012;We report on the transition from the strong to the weak light-matter;coupling regime between an intersubband excitation and a photonic;crystal resonance in a nanostructured semiconductor membrane. Such a;transition is induced by varying the intensity of an ultrafast light;pulse, which is employed for pumping and probing the system eigenmodes.;The phenomenon is interpreted in terms of the saturation of the;intersubband transition due to the large number of photoexcited;electrons in the quantum well, as confirmed by a thorough analysis;performed both in frequency and time domain.;Biasiol, Giorgio/C-5465-2009;Biasiol, Giorgio/0000-0001-7974-5459;5;0;0;0;5;1098-0121;WOS:000311605000002;;;J;Ciric, L.;Sienkiewicz, A.;Gaal, R.;Jacimovic, J.;Vaju, C.;Magrez, A.;Forro, L.;Defects and localization in chemically-derived graphene;PHYSICAL REVIEW B;86;19;195139;10.1103/PhysRevB.86.195139;NOV 27 2012;2012;We have performed electron spin resonance (ESR) measurements on a large;assembly of graphene oxide (GO) and reduced graphene oxide (RGO) flakes.;In GO samples the Curie tail is coming from 1.4 x 10(18) cm(-3) of;localized spins. Although reduction of GO was expected to reestablish;the pristine properties of graphene, no Pauli-like contribution was;detected and only a low concentration of 1.2 x 10(16) cm(-3) spin;carrying defects were measured. Our study, completed by resistivity;measurements, shows that the carrier transport in RGO samples is;dominated by hopping. The incomplete reduction of GO leaves behind a;large number of defects, presumably the majority of which are ESR;silent, causing the Anderson localization of the electronic states.;Slight doping with potassium indicates the appearance of a Pauli;contribution in the spin susceptibility.;Jacimovic, Jacim/C-2674-2013;2;0;0;0;2;1098-0121;WOS:000311537100001;;;J;Dietz, O.;Stoeckmann, H. -J.;Kuhl, U.;Izrailev, F. M.;Makarov, N. M.;Doppler, J.;Libisch, F.;Rotter, S.;Surface scattering and band gaps in rough waveguides and nanowires;PHYSICAL REVIEW B;86;20;201106;10.1103/PhysRevB.86.201106;NOV 27 2012;2012;The boundaries of waveguides and nanowires have drastic influence on;their coherent scattering properties. Designing the boundary profile is;thus a promising approach for transmission and band-gap engineering with;many applications. By performing an experimental study of microwave;transmission through rough waveguides we demonstrate that a recently;proposed surface scattering theory can be employed to predict the;measured transmission properties from the boundary profiles and vice;versa. A new key ingredient of this theory is a scattering mechanism;which depends on the squared gradient of the surface profiles. We;demonstrate the nontrivial effects of this scattering mechanism by;detailed mode-resolved microwave measurements and numerical simulations.;Dietz, Otto/E-9025-2011;4;0;0;0;4;1098-0121;WOS:000311537400001;;;J;Duong, Duc T.;Toney, Michael F.;Salleo, Alberto;Role of confinement and aggregation in charge transport in;semicrystalline polythiophene thin films;PHYSICAL REVIEW B;86;20;205205;10.1103/PhysRevB.86.205205;NOV 27 2012;2012;Crystallite orientations, molecular packing disorder, and hole mobility;of poly(3-hexylthiophene) thin films that are spin casted from different;solvents are studied as a function of film thickness. Grazing incidence;x-ray diffraction reveals that films consist of an ultrathin layer of;ordered, edge-on oriented aggregates and a more disordered, face-on;oriented bulk region. Diffraction and optical absorption spectroscopy;elucidate the film-forming process. Field-effect hole mobility provides;evidence for interconnecting aggregates as the mechanism for efficient;charge transport.;12;1;0;0;12;1098-0121;WOS:000311537400002;;;J;Farrell, David E.;Wolverton, C.;Structure and diffusion in liquid complex hydrides via ab initio;molecular dynamics;PHYSICAL REVIEW B;86;17;174203;10.1103/PhysRevB.86.174203;NOV 27 2012;2012;We have used density functional theory based ab initio molecular;dynamics (AIMD) to study NaAlH4, LiBH4, LiNH2, and Li2BNH6 across a;range of temperatures, above and below the experimental melting;temperature. We have elucidated the structure, vibrational, and;diffusion characteristics of these four materials. We find: (i) In all;cases, the liquid state remains a mixture of the ions found in the solid;state. (ii) The anions remain intact on average but undergo large;deformations across the range of temperatures. (iii) In the case of;LiNH2, there is evidence that the Li+ sublattice melts before the;anionic sublattice. (iv) We find a connection between increased;anion-anion ordering and reduced anion mobility even above the;experimental melting point, due to long range Coulombic interactions;between anions. (v) Finally, we find the liquid has the same major;vibrational modes as the solid, though the lower frequency vibration and;rotation modes become more prominent with increasing temperature.;Wolverton, Christopher/B-7542-2009;1;0;0;0;1;1098-0121;WOS:000311536400001;;;J;Gebhardt, Julian;Vines, Francesc;Goerling, Andreas;Influence of the surface dipole layer and Pauli repulsion on band;energies and doping in graphene adsorbed on metal surfaces;PHYSICAL REVIEW B;86;19;195431;10.1103/PhysRevB.86.195431;NOV 27 2012;2012;The synthesis of single-layer graphene sheets on metal surfaces can be;carried out routinely nowadays. The energetic alignment of the graphene;band structure, including the position of the Dirac point relative to;the Fermi level of the metal, and subsequently, the doping level of the;graphene sheet, depends crucially on the graphene-metal distance and the;specific metal considered. These dependencies are studied with;density-functional theory considering as typical metal surfaces Au(111),;Ni(111), and Au/Ni(111). In the latter case, a single layer of gold is;intercalated between the Ni(111) surface and the graphene sheet. We show;that the energetic positions of eigenstates of helium adsorbed on a;Au(111) surface exhibit a behavior with the adsorption distance;qualitatively comparable to that of bands of physisorbed graphene. In;both cases, the distance dependence of the energy of adsorbate bands can;be explained by the effect of the surface dipole layer on the adsorbate;bands and by electrostatic interactions caused by small charge;rearrangements due to Pauli repulsion between metal surface and;graphene. These charge rearrangements are neither caused by a charge;transfer nor by chemical interactions due to conventional orbital;interaction but have the effect to reduce the overlap of the surface;charge density of the metal with the charge density of the adsorbate.;The latter effect is known as pillow effect from molecules adsorbed on;metal surfaces. Charge transfer between graphene and the metal substrate;does occur but has an opposite effect to the surface dipole layer and;Pauli repulsion, i.e., reduces the effect of the latter. For very large;adsorption distances, this charge transfer vanishes in such a way that;the Dirac point of graphene aligns with the metal Fermi energy. It is;shown that the amount and character of graphene doping can be controlled;by tuning the graphene-metal distance. For a proper description of the;involved electrostatic potentials, a finite-slab correction had to be;applied to them in order to take into account the finite size of the;metal slabs used to model the substrate.;10;0;0;0;10;1098-0121;WOS:000311537100002;;;J;Han, Jae-Ho;Lee, Hyun-Woo;Interlayer exchange coupling between next nearest neighbor layers;PHYSICAL REVIEW B;86;17;174426;10.1103/PhysRevB.86.174426;NOV 27 2012;2012;Interlayer exchange coupling (IEC) between next nearest neighbor;magnetic layers is investigated. For a multilayer system that contains;threemagnetic layers (with magnetization directionsm (m)over-cap(1),;(m)(m)over-cap(2), and (m)(m)over-cap(3), respectively) separated by two;nonmagnetic layers, the angle dependence of the coupling energy and the;thickness dependence of coupling constants were obtained. In addition to;the well known nearest neighbor IEC of the form;-(J)over-tilde(12)(m)over-cap(1) center dot (m)over-cap(2) and;-(J)over-tilde(23)(m)over-cap(2) center dot (m)over-cap(3), we find the;next nearest neighbor IEC of the form -(J);over-tilde(123)((m)over-cap(1) center dot (m)over-cap(2))((m)over-cap(2);center dot (m)over-cap(3)), which is different from the Heisenberg type;next nearest neighbor coupling -J(13)(m)over-cap(1) center dot;(m)over-cap(3). The strength of the next nearest neighbor IEC oscillates;with respect to the thickness of both magnetic and nonmagnetic layers.;The strength of the next nearest neighbor IEC is generally smaller than;the conventional nearest neighbor IEC, but is large enough to allow for;experimental detection.;Lee, Hyun-Woo/B-8995-2008;Lee, Hyun-Woo/0000-0002-1648-8093;1;0;0;0;1;1098-0121;WOS:000311536400003;;;J;Lazo, Cesar;Neel, Nicolas;Kroeger, Joerg;Berndt, Richard;Heinze, Stefan;Tunneling magnetoresistance and exchange interaction in single-atom;contacts;PHYSICAL REVIEW B;86;18;180406;10.1103/PhysRevB.86.180406;NOV 27 2012;2012;The tunneling magnetoresistance of single-atom junctions is shown to;depend on the electrode separation owing to exchange forces and the;resulting geometric relaxations. An analytical model is proposed to;extract relaxations from the magnetoresistances measured with a scanning;tunneling microscope. Exchange forces and relaxations calculated within;density functional theory demonstrate the validity of the model for a;range of distances between tip and sample which extends from tunneling;close to the point of maximal attraction.;3;0;0;0;3;1098-0121;WOS:000311536700001;;;J;Luo, Xin;Sullivan, Michael B.;Quek, Su Ying;First-principles investigations of the atomic, electronic, and;thermoelectric properties of equilibrium and strained Bi2Se3 and Bi2Te3;including van der Waals interactions;PHYSICAL REVIEW B;86;18;184111;10.1103/PhysRevB.86.184111;NOV 27 2012;2012;Bi2Se3 and Bi2Te3 are layered compounds of technological importance,;being excellent thermoelectric materials as well as topological;insulators. We report density functional theory calculations of the;atomic, electronic, and thermoelectric properties of strained bulk and;thin-film Bi2Se3 and Bi2Te3, focusing on an appropriate description of;van der Waals (vdW) interactions. The calculations show that the van der;Waals density functional (vdW-DF) with Cooper's exchange (vdW-DFxC09);can reproduce closely the experimental interlayer distances in;unstrained Bi2Se3 and Bi2Te3. Interestingly, we predict atomic;structures that are in much better agreement with the experimentally;determined structure from Nakajima than that obtained from Wyckoff,;especially for Bi2Se3, where the difference in atomic structures;qualitatively changes the electronic band structure. The band structure;obtained using the Nakajima structure and the vdW-DFxC09 optimized;structure are in much better agreement with previous reports of;photoemission measurements, than that obtained using the Wyckoff;structure. Using vdW-DFxC09 to fully optimize atomic structures of bulk;and thin-film Bi2Se3 and Bi2Te3 under different in-plane and uniaxial;strains, we predict that the electronic bandgap of both the bulk;materials and thin films decreases with tensile in-plane strain and;increases with compressive in-plane strain. We also predict, using the;semiclassical Boltzmann approach, that the magnitude of the n-type;Seebeck coefficient of Bi2Te3 can be increased by the compressive;in-plane strain while that of Bi2Se3 can be increased with tensile;in-plane strain. Further, the in-plane power factor of n-doped Bi2Se3;can be increased with compressive uniaxial strain while that of n-doped;Bi2Te3 can be increased by compressive in-plane strain. Strain;engineering thus provides a direct method to control the electronic and;thermoelectric properties in these thermoelectric topological insulator;materials.;Quek, Su Ying/I-2934-2014;11;0;0;0;11;1098-0121;WOS:000311536700003;;;J;Olejnik, E.;Pandit, B.;Basel, T.;Lafalce, E.;Sheng, C-X.;Zhang, C.;Jiang, X.;Vardeny, Z. V.;Ultrafast optical studies of ordered poly(3-thienylene-vinylene) films;(vol 85, 235201, 2012);PHYSICAL REVIEW B;86;19;199903;10.1103/PhysRevB.86.199903;NOV 27 2012;2012;0;0;0;0;0;1098-0121;WOS:000311537100003;;;J;Qin, Zhen-Xing;Zhang, Chao;Tang, Ling-Yun;Zhong, Guo-Hua;Lin, Hai-Qing;Chen, Xiao-Jia;High-pressure phases of a hydrogen-rich compound: Tetramethylgermane;PHYSICAL REVIEW B;86;18;184110;10.1103/PhysRevB.86.184110;NOV 27 2012;2012;The vibrational and structural properties of a hydrogen-rich group IVa;hydride, Ge(CH3)(4), are studied by combining Raman spectroscopy and;synchrotron x-ray diffraction measurements at room temperature and at;pressures up to 30.2 GPa. Both techniques allow the obtaining of;complementary information on the high-pressure behaviors and yield;consistent phase transitions at 1.4 GPa for the liquid to solid and 3.0,;5.4, and 20.3 GPa for the solid to solid. The four high-pressure solid;phases are identified to have the cubic, orthorhombic, monoclinic, and;monoclinic crystal structures with space groups of Pa-3 for phase I,;Pnma for phase II, P2(1)/c for phase III, and P2(1) for phase IV,;respectively. These transitions are suggested to result from the changes;in the inter- and intramolecular bonding of this compound. The softening;of some Raman modes on CH3 groups and their sudden disappearance;indicate that Ge(CH3)(4) might be an ideal compound to realize;metallization and even high-temperature superconductivity at modest;static pressure for laboratory capability.;Zhong, Guohua/A-8811-2011; Zhang, Chao/E-5109-2010;Zhong, Guohua/0000-0003-0673-8738; Zhang, Chao/0000-0002-5957-2287;3;0;0;0;3;1098-0121;WOS:000311536700002;;;J;Wdowik, U. D.;Koza, M. M.;Chatterji, T.;Phonons in lanthanum manganite: Inelastic neutron scattering and density;functional theory studies;PHYSICAL REVIEW B;86;17;174305;10.1103/PhysRevB.86.174305;NOV 27 2012;2012;Dynamical properties of the lanthanum manganite lattice are examined by;inelastic neutron scattering experiments and density functional theory;calculations. Densities of vibrational states are measured close to the;Jahn-Teller transition temperature of 750 K. Substantial changes;observed in the phonon spectra above the phase transformation are due to;residual orthorhombic distortions that persist in the high-temperature;structure of lanthanum manganite. Results of the present theoretical;investigations supply additional information useful for both Raman and;infrared spectroscopies. In addition, they indicate that typical static;phonon calculations are insufficient to reproduce accurately;experimental magnitudes of these vibrational quantities of lanthanum;manganite that are determined to a large extent by dynamical effects.;0;0;0;0;0;1098-0121;WOS:000311536400002;;;J;Yan, Wei;Wubs, Martijn;Mortensen, N. Asger;Hyperbolic metamaterials: Nonlocal response regularizes broadband;supersingularity;PHYSICAL REVIEW B;86;20;205429;10.1103/PhysRevB.86.205429;NOV 27 2012;2012;We study metamaterials known as hyperbolic media that in the usual;local-response approximation exhibit hyperbolic dispersion and an;associated broadband singularity in the density of states. Instead, from;the more microscopic hydrodynamic Drude theory we derive qualitatively;different optical properties of these metamaterials, due to the;free-electron nonlocal optical response of their metal constituents. We;demonstrate that nonlocal response gives rise to a large-wavevector;cutoff in the dispersion that is inversely proportional to the Fermi;velocity of the electron gas, but also for small wavevectors we find;differences for the hyperbolic dispersion. Moreover, the size of the;unit cell influences effective parameters of the metamaterial even in;the deep subwavelength regime. Finally, instead of the broadband;supersingularity in the local density of states, we predict a large but;finite maximal enhancement proportional to the inverse cube of the Fermi;velocity.;Mortensen, Niels Asger/C-3592-2008; Wubs, Martijn/B-4934-2008;Mortensen, Niels Asger/0000-0001-7936-6264; Wubs,;Martijn/0000-0002-8286-7825;28;3;0;0;28;1098-0121;WOS:000311537400003;;;J;Yoneda, Y.;Kitanaka, Y.;Noguchi, Y.;Miyayama, M.;
7:2:97:7     Piezoelectric Response of Relaxor Solid Solution Na0.5Bi0.5TiO3-BaTiO3 Single Crystal Grown by Bridgman Method
DOI:10.1080/00150193.2011.577373  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Yasuda, N.;Otsuka, S.;Ohwa, H.;Fujita, K.;Iwata, M.;Terauchi, H.;Ishibashi, Y.;
7:2:97:8     Aging and stress-dependent dielectric properties of multiferroic bismuth ferrite ceramics
DOI:10.1016/j.matlet.2011.12.010  JN:MATERIALS LETTERS  PY:2012
  TC:3  AU: Unruan, M.;Sareein, T.;Chandarak, S.;Hunpratub, S.;Thongbai, P.;Maensiri, S.;Yimnirun, R.;
7:2:97:9     Polarization switching and relaxation dynamics of bismuth layered ferroelectric thin films: Role of oxygen defect sites and crystallinity
DOI:10.1103/PhysRevB.84.094112  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Lee, Ji Hye;Shin, Ran Hee;Jo, William;
7:2:98:1     Field induced changes in cycloidal spin ordering and coincidence between magnetic and electric anomalies in BiFeO3 multiferroic
DOI:10.1016/j.jmmm.2013.04.059  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:7  AU: Andrzejewski, B.;Molak, A.;Hilczer, B.;Budziak, A.;Bujakiewicz-Koronska, R.;
7:2:98:2     Resistance Switching Induced in BiMnO3 Ceramics
DOI:10.1080/00150193.2014.892815  JN:FERROELECTRICS  PY:2014
  TC:5  AU: Molak, A.;Ujma, Z.;Pilch, M.;Gruszka, I.;Pawelczyk, M.;
7:2:98:3     Resistivity switching induced in ferroelectric phase of PbTiO3 studied by XPS and electric conductivity tests
DOI:10.1016/j.jallcom.2013.10.103  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Pilch, M.;Molak, A.;
7:2:98:4     Adsorption-controlled growth of BiMnO3 films by molecular-beam epitaxy
DOI:10.1063/1.3457786  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Lee, J. H.;Ke, X.;Misra, R.;Ihlefeld, J. F.;Xu, X. S.;Mei, Z. G.;Heeg, T.;Roeckerath, M.;Schubert, J.;Liu, Z. K.;Musfeldt, J. L.;Schiffer, P.;Schlom, D. G.;
7:2:98:5     Room temperature ferromagnetic and ferroelectric properties of Bi1-xCaxMnO3 thin films
DOI:10.1063/1.4901184  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Pugazhvadivu, K. S.;Balakrishnan, L.;Rao, G. Mohan;Tamilarasan, K.;
7:2:98:6     DOS Calculation for Stoichiometric and Oxygen Defected (Bi1/2Na1/2)(Mn1/2Nb1/2)O-3
DOI:10.1080/00150193.2014.891918  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Bujakiewicz-Koronska, R.;Nalecz, D. M.;Molak, A.;Budziak, A.;
7:2:98:7     The Estimation of the Mn Atoms Chemical Bonding in (Na1-xBix)(Nb1-yMny)O-3 Ceramics and Changeover in the Electrical Properties
DOI:10.1080/00150193.2011.578544  JN:FERROELECTRICS  PY:2011
  TC:4  AU: Molak, A.;Lawniczak-Jablonska, K.;Nachimuthu, P.;Perera, R. C. C.;
7:2:98:8     Thermal Treatment Effects in PbTiO3 Crystals Studied by XPS and Electric Conductivity Tests
DOI:10.1080/00150193.2014.894866  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Pilch, M.;Molak, A.;Szot, K.;
7:2:98:9     Investigations of Low Temperature Phase Transitions in BiFeO3 Ceramic by Infrared Spectroscopy
DOI:10.1080/00150193.2011.578495  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Bujakiewicz-Koronska, R.;Hetmanczyk, L.;Garbarz-Glos, B.;Budziak, A.;Koronski, J.;Hetmanczyk, J.;Antonova, M.;Kalvane, A.;Nalecz, D.;
7:2:98:10     Effect of substrate and Ca doping on the properties of BiMnO3 thin films by RF magnetron sputtering
DOI:10.1016/j.matlet.2012.02.101  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Pugazhvadivu, K. S.;Balakrishnan, L.;Tamilarasan, K.;
7:2:99:1     Improved dielectric and ferroelectric properties in Ti-doped BiFeO3-PbTiO3 thin films prepared by pulsed laser deposition
DOI:10.1016/j.tsf.2009.11.072  JN:THIN SOLID FILMS  PY:2010
  TC:13  AU: Chen, Ling;Ren, Wei;Zhu, Weimin;Ye, Zuo-Guang;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:2:99:2     Microstructure development of BiFeO3-PbTiO3 films deposited by pulsed laser deposition on platinum substrates
DOI:10.1016/j.actamat.2013.11.043  JN:ACTA MATERIALIA  PY:2014
  TC:1  AU: Esat, Faye;Comyn, Tim P.;Bell, Andrew J.;
7:2:99:3     Impedance spectroscopy and dielectric properties of Ce and La substituted Pb0.7Sr0.39Fe0.012Ti0.988)O-3 nanoparticles
DOI:10.1016/j.jallcom.2011.01.144  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:10  AU: Verma, Kuldeep Chand;Ram, Mast;Singh, Jitender;Kotnala, R. K.;
7:2:99:4     Nanograins dependent dielectric constant, tunability, phase transition, impedance spectroscopy and leakage current of (Pb-1 (-) Sr-x(x))TiO3 thin films
DOI:10.1016/j.tsf.2009.10.011  JN:THIN SOLID FILMS  PY:2010
  TC:9  AU: Verma, Kuldeep Chand;Kotnala, R. K.;Verma, Vivek;Negi, N. S.;
7:2:99:5     Structural, Dielectric and Ferroelectric Properties of Ti-Modified 0.72BiFeO(3)-0.28PbTiO(3) Multiferroic Thin Films Prepared by Pulsed Laser Deposition
DOI:10.1080/00150193.2010.492058  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Chen, Ling;Ren, Wei;Zhu, Weimin;Ye, Zuo-Guang;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:2:99:6     Electric and Magnetic Properties of Bilayered Lead-Free Piezoelectric and Multiferroic Bi 0.9 Dy 0.1 FeO 3/K 0.5 Na 0.5 NbO 3 Thin Films
DOI:10.1111/j.1551-2916.2012.05279.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Chen, Ling;Ren, Wei;Ye, Zuo-Guang;Tian, Aifen;Wu, Xiaoqing;Shi, Peng;Chen, Xiaofeng;
7:2:99:7     Synthesis, structure and dielectric properties of (1-x)[0.9BiFeO(3)-0.1DyFeO(3)]-xPbTiO(3) pseudo-binary ceramics
DOI:10.1016/j.ceramint.2012.10.063  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Zhuang, Jian;Chen, Ling;Ren, Wei;Ye, Zuo-Guang;
7:2:99:8     Spring like ferromagnetic behavior of xLi(0.5)Fe(2.5)O(4)-(1-x)SrFe2O4 nanoferrite thin films
DOI:10.1007/s11051-011-0491-z  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:1  AU: Verma, Kuldeep Chand;Kotnala, R. K.;
7:2:99:9     Magnetoelectric coupling and relaxor ferroelectric properties of Pb0.7Sr0.3(Fe0.012Ti0.988)O-3 thin film
DOI:10.1016/j.scriptamat.2010.06.049  JN:SCRIPTA MATERIALIA  PY:2010
  TC:4  AU: Verma, Kuldeep Chand;Negi, N. S.;
7:2:99:10     The effect of post deposition anneal temperature on the structure of BiFeO3-PbTiO3 thin films
DOI:10.1016/j.tsf.2012.09.066  JN:THIN SOLID FILMS  PY:2012
  TC:0  AU: Bygrave, Faye;Comyn, Tim P.;Bell, Andrew J.;
7:2:100:1     Actual information storage with a recording density of 4 Tbit/in.(2) in a ferroelectric recording medium
DOI:10.1063/1.3463470  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Tanaka, Kenkou;Cho, Yasuo;
7:2:100:2     Resonances in ferroelectric phononic superlattice
DOI:10.1063/1.4757989  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Ostrovskii, Igor;Cremaldi, Lucien;
7:2:100:3     Stability of nano-scale ferroelectric domains in a LiNbO3 single crystal: The role of surface energy and polar molecule adsorption
DOI:10.1063/1.4711098  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Sun, X.;Su, Y. J.;Li, X.;Gao, K. W.;Qiao, L. J.;
7:2:100:4     Scanning nonlinear dielectric microscopy
DOI:10.1557/jmr.2011.219  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:14  AU: Cho, Yasuo;
7:2:100:5     Piezoelectric properties and surface potential behavior in LiNbO3 thin films grown by the radio frequency magnetron sputtering
DOI:10.1016/j.jallcom.2013.01.116  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Zhukov, R. N.;Bykov, A. S.;Kiselev, D. A.;Malinkovich, M. D.;Parkhomenko, Yu N.;
7:2:100:6     Lateral resolution improvement in scanning nonlinear dielectric microscopy by measuring super-higher-order nonlinear dielectric constants
DOI:10.1063/1.4766349  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Chinone, N.;Yamasue, K.;Hiranaga, Y.;Honda, K.;Cho, Y.;
7:2:100:7     Cross-sectional dopant profiling and depletion layer visualization of SiC power double diffused metal-oxide-semiconductor field effect transistor using super-higher-order nonlinear dielectric microscopy
DOI:10.1063/1.4893959  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chinone, N.;Nakamura, T.;Cho, Y.;
7:2:100:8     Velocity dispersion of plate acoustic waves in a multidomain phononic superlattice
DOI:10.1103/PhysRevB.82.014302  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Ostrovskii, I. V.;Nadtochiy, A. B.;Klymko, V. A.;
7:2:100:9     Intravascular ultrasound chirp imaging
DOI:10.1063/1.3679375  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Maresca, D.;Jansen, K.;Renaud, G.;van Soest, G.;Li, X.;Zhou, Q.;de Jong, N.;Shung, K. K.;van der Steen, A. F. W.;
7:2:101:1     Structural, dielectric, and magnetic properties of La0.8Bi0.2Fe1-xMnxO3 (0.0 <= x <= 0.4) multiferroics
DOI:10.1063/1.3386527  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Anjum, G.;Kumar, Ravi;Mollah, S.;Shukla, D. K.;Kumar, Shalendra;Lee, C. G.;
7:2:101:2     Magneto-electric coupling in multiferroic La0.8Bi0.2Fe0.7Mn0.3O3 ceramic
DOI:10.1016/j.matlet.2010.06.019  JN:MATERIALS LETTERS  PY:2010
  TC:11  AU: Anjum, G.;Mollah, S.;Shukla, D. K.;Kumar, Ravi;
7:2:101:3     Heat capacity, thermopower and magnetoresistance effects in multiferroic La0.5Bi0.5Mn0.5Fe0.5O3
DOI:10.1007/s10853-013-7580-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:3  AU: Jha, V. K.;Nautiyal, Pranjal;Seikh, Md Motin;Chatterjee, R.;Mahendiran, R.;Kundu, Asish K.;
7:2:101:4     Photo-induced properties in BiFeO3 film
DOI:10.1016/j.matchemphys.2011.11.038  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:4  AU: Luo Bing-Cheng;Chen Chang-Le;Jin Ke-Xin;
7:2:101:5     Anomaly Diffuse and Dielectric Relaxation of Barium Titanate at High Temperatures
DOI:10.1080/00150193.2011.594735  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Fan, Huiqing;Ren, Pengrong;
7:2:101:6     Enhanced Ferromagnetism of Ho, Mn co-Doped BiFeO3 Nanoparticles
DOI:10.1080/10584587.2013.778718  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:5  AU: Zhao, Shifeng;Yun, Qi;
7:2:101:7     Incoherent effect of Fe and Ni substitutions in the ferromagnetic-insulator La0.6Bi0.4MnO3+delta
DOI:10.1063/1.3646458  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Kundu, Asish K.;Seikh, Md. Motin;Srivastava, Akhilesh;Mahajan, S.;Chatterjee, R.;Pralong, V.;Raveau, B.;
7:2:101:8     Polaronic relaxation in La0.8Bi0.2Fe0.7Mn0.3O3
DOI:10.1016/j.matchemphys.2012.03.022  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:1  AU: Xu, K. B.;Wang, C. C.;Zhang, M. N.;Wang, G. J.;Cui, Y. M.;
7:2:101:9     Effect of Zn doping on structural, magnetic and dielectric properties of LaFeO3 synthesized through sol-gel auto-combustion process
DOI:10.1016/j.materresbull.2013.07.028  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:7  AU: Bhat, Irshad;Husain, Shahid;Khan, Wasi;Patil, S. I.;
7:2:102:1     Anomalous magnetic behavior below 10 K in YCrO3 nanoparticles obtained under droplet confinement
DOI:10.1063/1.4826503  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Singh, Inderjeet;Nigam, A. K.;Landfester, Katharina;Munoz-Espi, Rafael;Chandra, Amreesh;
7:2:102:2     Stabilization of dielectric anomaly near the magnetic phase transition in Ca2+ doped BiFeO3 multifunctional ceramics
DOI:10.1016/j.jallcom.2013.02.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:15  AU: Tirupathi, Patri;Chandra, Amreesh;
7:2:102:3     Complex GdSc1-xInxO3 Oxides: Synthesis and Structure Driven Tunable Electrical Properties
DOI:10.1021/cm300908h  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:11  AU: Grover, V.;Shukla, R.;Jain, D.;Deshpande, S. K.;Arya, A.;Pillai, C. G. S.;Tyagi, A. K.;
7:2:102:4     Tunable perpendicular magnetic anisotropy in GdFeCo amorphous films
DOI:10.1016/j.jmmm.2013.03.007  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:6  AU: Ding, Manli;Poon, S. Joseph;
7:2:102:5     Structural and photoluminescent properties of Al2O3: Cr3+ nanoparticles via solution combustion synthesis method
DOI:10.1016/j.apt.2013.11.009  JN:ADVANCED POWDER TECHNOLOGY  PY:2014
  TC:2  AU: Rani, Geeta;Sahare, P. D.;
7:2:102:6     Magnetism and infrared magnetotransmission of Nd0.5Sr0.5MnO3 manganite in nanostate
DOI:10.1016/j.jmmm.2013.04.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:3  AU: Loshkareva, N. N.;Mostovshchikova, E. V.;Korolyov, A. V.;Naumov, S. V.;Gizhevskii, B. A.;Solin, N. I.;Naumova, L. I.;Telegin, S. V.;Elohina, L. V.;
7:2:103:1:1     A quantitative acoustic emission study on fracture processes in ceramics based on wavelet packet decomposition
DOI:10.1063/1.4893723  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ning, J. G.;Chu, L.;Ren, H. L.;
7:2:103:1:2     A scaling law for the dynamic strength of brittle solids
DOI:10.1016/j.actamat.2013.02.045  JN:ACTA MATERIALIA  PY:2013
  TC:12  AU: Kimberley, J.;Ramesh, K. T.;Daphalapurkar, N. P.;
7:2:103:1:3     Quantification of failure mechanisms in mode-I loading of fiber reinforced plastics utilizing acoustic emission analysis
DOI:10.1016/j.compscitech.2011.10.013  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2012
  TC:24  AU: Sause, M. G. R.;Mueller, T.;Horoschenkoff, A.;Horn, S.;
7:2:103:1:4     Acoustic emission characterization of fracture toughness for fiber reinforced ceramic matrix composites
DOI:10.1016/j.msea.2012.09.081  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2013
  TC:4  AU: Mei, Hui;Sun, Yuyao;Zhang, Lidong;Wang, Hongqin;Cheng, Laifei;
7:2:103:2:1:1     A progressive damage simulation algorithm for GFRP composites under cyclic loading. Part II: FE implementation and model validation
DOI:10.1016/j.compscitech.2011.01.025  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2011
  TC:6  AU: Eliopoulos, Elias N.;Philippidis, Theodore P.;
7:2:103:2:1:2     A progressive damage simulation algorithm for GFRP composites under cyclic loading. Part I: Material constitutive model
DOI:10.1016/j.compscitech.2011.01.023  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2011
  TC:4  AU: Eliopoulos, Elias N.;Philippidis, Theodore P.;
7:2:103:2:1:3     Damage quantification in polymer composites using a hybrid NDT approach
DOI:10.1016/j.compscitech.2013.04.013  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2013
  TC:10  AU: Cuadra, Jefferson;Vanniamparambil, Prashanth A.;Hazeli, Kavan;Bartoli, Ivan;Kontsos, Antonios;
7:2:103:2:2:1     Crack Growth Monitoring in Ceramic Matrix Composites by Combined Infrared Thermography and Acoustic Emission
DOI:10.1111/jace.12592  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Dassios, Konstantinos G.;Kordatos, Evangelos Z.;Aggelis, Dimitris G.;Matikas, Theodore E.;
7:2:103:2:2:2     Real-time evaluation of energy attenuation: A novel approach to acoustic emission analysis for damage monitoring of ceramic matrix composites
DOI:10.1016/j.jeurceramsoc.2013.12.041  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Maillet, E.;Godin, N.;R'Mili, M.;Reynaud, P.;Fantozzi, G.;Lamon, J.;
7:2:103:2:2:3     Analysis of Acoustic Emission energy release during static fatigue tests at intermediate temperatures on Ceramic Matrix Composites: Towards rupture time prediction
DOI:10.1016/j.compscitech.2012.03.011  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2012
  TC:12  AU: Maillet, E.;Godin, N.;R'Mili, M.;Reynaud, P.;Lamon, J.;Fantozzi, G.;
7:2:103:3:1     Acoustic emission and changes in dislocation structure and magnetostriction accompanying plastic deformation of [126]-oriented Fe-Ga alloy single crystals
DOI:10.1063/1.4846815  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Saha, B.;Ramanathan, M.;Ren, C.;Appusamy, K.;McCarter, M. K.;Guruswamy, S.;Cook, R.;Miller, D. J.;
7:2:103:3:2     Influence of plastic deformation on the magnetostrictive behavior of [126]-oriented Fe-Ga alloy single crystals
DOI:10.1063/1.3686680  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Saha, Biswadeep;Ramanathan, Meenakshisundaram;Ren, Chai;Guruswamy, Sivaraman;
7:2:104:1     Impact of electrostatic forces in contact-mode scanning force microscopy
DOI:10.1103/PhysRevB.81.094109  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Johann, F.;Hoffmann, A.;Soergel, E.;
7:2:104:2     Large-area regular nanodomain patterning in He-irradiated lithium niobate crystals
DOI:10.1088/0957-4484/22/28/285309  JN:NANOTECHNOLOGY  PY:2011
  TC:7  AU: Ofan, A.;Lilienblum, M.;Gaathon, O.;Sehrbrock, A.;Hoffmann, A.;Bakhru, S.;Bakhru, H.;Irsen, S.;Osgood, R. M., Jr.;Soergel, E.;
7:2:104:3     Determination of the effective coercive field of ferroelectrics by piezoresponse force microscopy
DOI:10.1063/1.3624802  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Lilienblum, M.;Soergel, E.;
7:2:104:4     Low-voltage nanodomain writing in He-implanted lithium niobate crystals
DOI:10.1063/1.3319839  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Lilienblum, M.;Ofan, A.;Hoffmann, A.;Gaathon, O.;Vanamurthy, L.;Bakhru, S.;Bakhru, H.;Osgood, R. M., Jr.;Soergel, E.;
7:2:104:5     Kinetics of linear domains in LiNbO3 single crystals polarized by scanning probe microscopy
DOI:10.1063/1.4850716  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Bo, Huifeng;Jin, Yaming;Xu, Tingting;Du, Yingchao;Kan, Yi;Lu, Xiaomei;Zhu, Jinsong;
7:2:104:6     Poling-inhibited ridge waveguides in lithium niobate crystals
DOI:10.1063/1.3504698  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Sones, C. L.;Ganguly, P.;Ying, C. Y. J.;Soergel, E.;Eason, R. W.;Mailis, S.;
7:2:104:7     Quantification of electromechanical coupling measured with piezoresponse force microscopy
DOI:10.1063/1.4891353  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Lepadatu, Serban;Stewart, Mark;Cain, Markys G.;
7:2:104:8     Decay properties of artificial two-domain structures in LiNbO3 crystals studied by scanning probe microscope
DOI:10.1063/1.3515850  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:1  AU: Kan, Yi;Bo, Huifeng;Lu, Xiaomei;Xu, Tingting;Jin, Yaming;Wu, Xiaobo;Huang, Fengzhen;Zhu, Jinsong;
7:2:105:1     Epitaxial Patterning of Bi2FeCrO6 Double Perovskite Nanostructures: Multiferroic at Room Temperature
DOI:10.1002/adma.201004405  JN:ADVANCED MATERIALS  PY:2011
  TC:28  AU: Nechache, Riad;Cojocaru, Cristian Victor;Harnagea, Catalin;Nauenheim, Christian;Nicklaus, Mischa;Ruediger, Andreas;Rosei, Federico;Pignolet, Alain;
7:2:105:2     Single-crystalline BiFeO3 nanowires and their ferroelectric behavior
DOI:10.1063/1.4766343  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Li, Shun;Nechache, Riad;Harnagea, Catalin;Nikolova, Liliya;Rosei, Federico;
7:2:105:3     High-frequency electromagnetic properties of epitaxial Bi2FeCrO6 thin films grown by pulsed laser deposition
DOI:10.1063/1.3657528  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Aissa, Brahim;Nechache, Riad;Therriault, Daniel;Rosei, Federico;Nedil, Mourad;
7:2:105:4     Controlling magnetism of multiferroic (Bi0.9La0.1)(2)FeCrO6 thin films by epitaxial and crystallographic orientation strain
DOI:10.1063/1.4807129  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Khare, Amit;Singh, Abhishek;Prabhu, S. S.;Rana, D. S.;
7:2:105:5     Promising ferrimagnetic double perovskite oxides towards high spin polarization at high temperature
DOI:10.1063/1.4775352  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Li, Si-Da;Chen, Peng;Liu, Bang-Gui;
7:2:106:1     Origin of suppressed polarization in BiFeO3 films
DOI:10.1063/1.3506902  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Park, J. W.;Baek, S. H.;Wu, P.;Winchester, B.;Nelson, C. T.;Pan, X. Q.;Chen, L. Q.;Tybell, T.;Eom, C. B.;
7:2:106:2     Strain effect on the surface potential and nanoscale switching characteristics of multiferroic BiFeO3 thin films
DOI:10.1063/1.3698155  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Yan, F.;Miao, S.;Zhu, T. J.;Lai, M. O.;Lu, L.;
7:2:106:3     Ferroelectric domain switching investigation of BiFeO3 thin film on Pt/Ti/SiO2/Si (111) substrate
DOI:10.1016/j.apsusc.2012.04.051  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:9  AU: Fan, Fei;Luo, Bingcheng;Duan, Mengmeng;Xing, Hui;Jin, Kexin;Chen, Changle;
7:2:106:4     The investigation of (Bi,La)(Ga,Fe)O-3-PbTiO3 thin film prepared by PLD technique
DOI:10.1016/j.mseb.2011.10.019  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:1  AU: Yu, Shengwen;Sun, Dongmei;Yang, Wufeng;Cheng, Jinrong;
7:2:107:1     Kelvin probe force microscopy and electrostatic force microscopy responses to the polarization in a ferroelectric thin film: Theoretical and experimental investigations
DOI:10.1063/1.4812393  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Cuniot-Ponsard, M.;
7:2:107:2     Landau-Ginzburg-Devonshire theory for electromechanical hysteresis loop formation in piezoresponse force microscopy of thin films
DOI:10.1063/1.3623763  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Morozovska, A. N.;Eliseev, E. A.;Bravina, S. L.;Kalinin, S. V.;
7:2:107:3     Anomalous domain inversion in LiNbO3 single crystals investigated by scanning probe microscopy
DOI:10.1063/1.3623775  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Lilienblum, M.;Soergel, E.;
7:2:107:4     Top electrode size effect on hysteresis loops in piezoresponse force microscopy of Pb(Zr,Ti)O-3-film on silicon structures
DOI:10.1063/1.4746028  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Bravina, S. L.;Morozovsky, N. V.;Eliseev, E. A.;Morozovska, A. N.;Costecalde, J.;Soyer, C.;Remiens, D.;Deresmes, D.;
7:2:107:5     Path-related unexpected injection charges in BaTiO3 ferroelectric thin films studied by Kelvin force microscopy
DOI:10.1063/1.3499749  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Guo, Huifen;Cheng, Gang;Wang, Shujie;Dai, Shuxi;Wu, Sixin;Zhou, Shaomin;Li, Yuncai;Du, Zuliang;
7:2:108:1     Probing Ferroelectrics Using Optical Second Harmonic Generation
DOI:10.1111/j.1551-2916.2011.04740.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:24  AU: Denev, Sava A.;Lummen, Tom T. A.;Barnes, Eftihia;Kumar, Amit;Gopalan, Venkatraman;
7:2:108:2     Photoinduced stabilization and enhancement of the ferroelectric polarization in Ba0.1Sr0.9TiO3/La0.7Ca(Sr)(0.3)MnO3 thin film heterostructures
DOI:10.1103/PhysRevB.88.020101  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Sheu, Y. M.;Trugman, S. A.;Yan, L.;Chuu, C.-P.;Bi, Z.;Jia, Q. X.;Taylor, A. J.;Prasankumar, R. P.;
7:2:108:3     Domain structure analysis of Pb(Zn1/3Nb2/3)O-3-9% PbTiO3 single crystals using optical second harmonic generation microscopy
DOI:10.1103/PhysRevB.82.184116  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Kaneshiro, Junichi;Uesu, Yoshiaki;
7:2:108:4     Rectifying characteristic of perovskite oxide La1.89Ce0.11CuO4/Ba0.5Sr0.5TiO3/La0.67Sr0.33MnO3 heterostructures
DOI:10.1063/1.3662909  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Xia, F. J.;Fu, Y. J.;Yuan, J.;Wu, H.;Xie, Z.;Xu, B.;Cao, L. X.;Zhao, B. R.;Zhu, B. Y.;
7:2:108:5     Effects of ZnO film thickness on electrical and magnetoresistance characteristics of La0.8Sr0.2MnO3/ZnO heterostructures
DOI:10.1016/j.jmmm.2010.04.006  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:5  AU: Feng, Yuchun;Zhang, Ming;
7:2:109:1     Origin of piezoelectric response under a biased scanning probe microscopy tip across a 180 degrees ferroelectric domain wall
DOI:10.1103/PhysRevB.86.134115  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Lei, Shiming;Eliseev, Eugene A.;Morozovska, Anna N.;Haislmaier, Ryan C.;Lummen, Tom T. A.;Cao, W.;Kalinin, Sergei V.;Gopalan, Venkatraman;
7:2:109:2     Comment on 'Origin of piezoelectric response under a biased scanning probe microscopy tip across a 180 degrees ferroelectric domain wall' Reply
DOI:10.1103/PhysRevB.89.226102  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Lei, Shiming;Eliseev, Eugene A.;Morozovska, Anna N.;Haislmaier, Ryan C.;Lummen, Tom T. A.;Cao, W.;Kalinin, Sergei V.;Gopalan, Venkatraman;
7:2:109:3     Background-free piezoresponse force microscopy for quantitative measurements
DOI:10.1063/1.4866264  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wang, Wenbo;Geng, Yanan;Wu, Weida;
7:2:109:4     Comment on "Origin of piezoelectric response under a biased scanning probe microscopy tip across a 180 degrees ferroelectric domain wall"
DOI:10.1103/PhysRevB.89.226101  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Jungk, T.;Hoffmann, A.;Soergel, E.;
7:2:109:5     Lateral signals in piezoresponse force microscopy at domain boundaries of ferroelectric crystals
DOI:10.1063/1.3486226  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Johann, Florian;Jungk, Tobias;Lilienblum, Martin;Hoffmann, Akos;Soergel, Elisabeth;
7:2:109:6     Origin of piezoelectric response under a biased scanning probe microscopy tip across a 180 degrees ferroelectric domain wall (vol 86, 134115, 2012)
DOI:10.1103/PhysRevB.87.179904  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Lei, Shiming;Eliseev, Eugene A.;Morozovska, Anna N.;Haislmaier, Ryan C.;Lummen, Tom T. A.;Cao, W.;Kalinin, Sergei V.;Gopalan, Venkatraman;
7:2:110:1     Surface-induced piezomagnetic, piezoelectric, and linear magnetoelectric effects in nanosystems
DOI:10.1103/PhysRevB.82.085408  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Eliseev, E. A.;Morozovska, A. N.;Glinchuk, M. D.;Zaulychny, B. Y.;Skorokhod, V. V.;Blinc, R.;
7:2:110:2     Nanovoid growth in nanocrystalline metal by dislocation shear loop emission
DOI:10.1016/j.msea.2011.03.074  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2011
  TC:9  AU: Wang, Lu;Zhou, Jianqiu;Liu, Yingguang;Zhang, Shu;Wang, Ying;Xing, Wei;
7:2:110:3     Atomistic elucidation of the effect of surface roughness on curvature-dependent surface energy, surface stress, and elasticity
DOI:10.1063/1.3695069  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Mohammadi, P.;Sharma, P.;
7:2:110:4     Complete Symmetry Analyses of the Surface-Induced Piezomagnetic, Piezoelectric and Linear Magnetoelectric Effects
DOI:10.1080/00150193.2011.578503  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Eliseev, E. A.;
7:2:110:5     On the Symmetry Analysis of Surface Induced Effects
DOI:10.1080/00150193.2014.875448  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Litvin, Daniel B.;
7:2:110:6     Numerical simulations of void growth in aluminum alloy AA5083 during elevated temperature deformation
DOI:10.1016/j.msea.2010.04.010  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2010
  TC:2  AU: Du, Ningning;Bower, Allan F.;Krajewski, Paul E.;
7:2:111:1     Ferroelectric domains in epitaxial PbTiO3 films on LaAlO3 substrate investigated by piezoresponse force microscopy and far-infrared reflectance
DOI:10.1063/1.3651510  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Simon, E.;Borodavka, F.;Gregora, I.;Nuzhnyy, D.;Kamba, S.;Hlinka, J.;Bartasyte, A.;Margueron, S.;
7:2:111:2     Enhancement on effective piezoelectric coefficient d(33) of Bi3.15Dy0.85Ti3O12 ferroelectric thin films
DOI:10.1016/j.matlet.2009.12.021  JN:MATERIALS LETTERS  PY:2010
  TC:5  AU: Zheng, X. J.;Rong, Y. F.;Zhang, D. Z.;Zhang, T.;He, L.;Feng, X.;
7:2:111:3     Soft-mode spectroscopy of epitaxial BaTiO3/SrTiO3 superlattices
DOI:10.1103/PhysRevB.82.224102  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Hlinka, J.;Zelezny, V.;Nakhmanson, S. M.;Soukiassian, A.;Xi, X. X.;Schlom, D. G.;
7:2:111:4     Nanoscale domain switchings of Bi3.15Dy0.85Ti3O12 thin film under the simultaneous application of polarizing voltage and loading force
DOI:10.1063/1.4775400  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Zhu, Z.;Zheng, X. J.;Yang, Z. C.;Qu, S.;
7:2:111:5     Annealing temperature dependence of effective piezoelectric coefficients for Bi3.15Eu0.85Ti3O12 thin films
DOI:10.1007/s10853-010-4301-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:4  AU: Zheng, X. J.;Wu, Q. Y.;Peng, J. F.;He, L.;Feng, X.;Chen, Y. Q.;Zhang, D. Z.;
7:2:111:6     Ferroelectric behavior of bismuth titanate thin films grown via magnetron sputtering
DOI:10.1016/j.ceramint.2014.04.017  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Bedoya-Hincapie, C. M.;Restrepo-Parra, E.;Olaya-Florez, J. J.;Alfonso, J. E.;Flores-Ruiz, F. J.;Espinoza-Beltran, F. J.;
7:2:111:7     Infrared Spectroscopy of Nanoscopic Epitaxial BaTiO3/SrTiO3 Superlattices
DOI:10.1080/10584587.2012.677590  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Zelezny, V.;Soukiassian, A.;Xi, X. X.;Schlom, D. G.;Hlinka, J.;Kadlec, C.;Nakhmanson, S. M.;
7:2:111:8     The threshold electric field of 180 degrees domain switching in the misfit strain-external electric field phase diagram
DOI:10.1063/1.3610425  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Zhu, Z.;Zheng, X. J.;Jiang, D. D.;Yang, Z. C.;
7:2:111:9     Enhancement on effective piezoelectric coefficient of Bi3 25Eu0 75Ti3O12 ferroelectric thin films under moderate annealing temperature
DOI:10.1016/j.tsf.2010.08.130  JN:THIN SOLID FILMS  PY:2010
  TC:0  AU: Zheng, X. J.;Peng, J. F.;Chen, Y. Q.;He, L.;Feng, X.;Zhang, D. Z.;Gong, L. J.;Wu, Q. Y.;
7:2:112:1     Investigation of the structural, optical and dielectric properties of highly (100)-oriented (Pb0.60Ca0.20Sr0.20)TiO3 thin films on LaNiO3 bottom electrode
DOI:10.1016/j.mseb.2014.02.020  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:0  AU: Pontes, D. S. L.;Pontes, F. M.;Chiquito, A. J.;Longo, E.;
7:2:112:2     Improvement of the fatigue and the ferroelectric properties of PZT films through a LSCO seed layer
DOI:10.1016/j.mseb.2013.08.001  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:4  AU: Rodrigues, Sofia A. S.;Silva, Jose P. B.;Khodorov, Anatoli;Martin-Sanchez, Javier;Pereira, M.;Gomes, M. J. M.;
7:2:112:3     Enhancement of epitaxial LaNiO3 electrode on the ferroelectric property of La-doped BiFeO3/SrTiO3 artificial superlattice structure by rf sputtering
DOI:10.1016/j.jcrysgro.2012.12.021  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:2  AU: Chiu, Shang-Jui;Liu, Yen-Ting;Yu, Ge-Ping;Lee, Hsin-Yi;Huang, Jia-Hong;
7:2:112:4     Polarization Fatigue of NiCr/PZT/BaPbO3 Capacitors on Platinized Silicon Wafers
DOI:10.1080/00150193.2010.483381  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Suchaneck, G.;Gerlach, G.;
7:2:112:5     Reactive magnetron sputtering from a composite target for large area BaPbO3 thin film electrode
DOI:10.1016/j.tsf.2009.11.001  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Vidyarthi, V. S.;Suchaneck, G.;Gerlach, G.;Levin, A. A.;Meyer, D. C.;Groetzschel, R.;
7:2:112:6     Effect of the electrode structure on the electrical properties of alkoxide derived ferroelectric thin film
DOI:10.1016/j.matlet.2010.04.028  JN:MATERIALS LETTERS  PY:2010
  TC:8  AU: Ohno, Tomoya;Matsuda, Takeshi;Nukina, Takero;Sakamoto, Naonori;Wakiya, Naoki;Tokuda, Shou;Suzuki, Hisao;
7:2:113:1     Microstructure and Relaxor Behavior of Dense Fine-Grain FeTiTaO6 Ceramics
DOI:10.1111/j.1551-2916.2010.03829.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Shi, Yun;Hou, Yu-Dong;Wang, Chao;Ge, Hai-Yan;Zhu, Man-Kang;
7:2:113:2     Low-temperature polaronic relaxations with variable range hopping conductivity in FeTiMO6 (M = Ta,Nb,Sb)
DOI:10.1103/PhysRevB.84.064301  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Deshpande, S. K.;Achary, S. N.;Mani, Rohini;Gopalakrishnan, J.;Tyagi, A. K.;
7:2:113:3     Novel Near-Room-Temperature Type I Multiferroic: Pb(Fe0.5Ti0.25W0.25)O-3 with Coexistence of Ferroelectricity and Weak Ferromagnetism
DOI:10.1021/cm300470f  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:6  AU: Larregola, Sebastian A.;Pedregosa, Jose C.;Alguero, Miguel;Jimenez, Ricardo;Garcia-Hernandez, Mar;Fernandez-Diaz, Maria T.;Alonso, Jose A.;
7:2:113:4     Simultaneously improved magnetization and polarization in BiFeO3 based multiferroic composites
DOI:10.1063/1.3332040  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Zhang, Shuxia;Luo, Wanju;Wang, Lei;Wang, Dongliang;Ma, Yanwei;
7:2:113:5     Room-temperature dielectric relaxation and magnetic properties in rutile-type FeTiNbO6
DOI:10.1016/j.materresbull.2013.04.047  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Wang, Sai;Hou, Yu-Dong;Zheng, Mu-Peng;Ge, Hai-Yan;Zhu, Man-Kang;Yan, Hui;
7:2:113:6     Comparative studies of ferroelectric behavior in rutile type FeTiTaO6 and AlTiTaO6
DOI:10.1016/j.materresbull.2011.11.050  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:2  AU: Hou, Yu-dong;Shi, Yun;Ge, Hai-yan;Zhu, Man-kang;Yan, Hui;
7:2:113:7     Magnetic and ferroelectric properties of PbFe1/2Nb1/2O3 synthesized by a solution precipitation method
DOI:10.1016/j.jallcom.2010.05.153  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:3  AU: Bochenek, D.;
7:2:114:1     Multiferroicity in 0.7Pb(Zr0.52Ti0.48)O-3-0.3Pb(Ni1/3Nb2/3)O-3 ceramics
DOI:10.1063/1.3693145  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Su, Jie;Lu, Xiaomei;Liu, Yaoyang;Zhang, Junting;Li, Guorong;Ruan, Xuezheng;Huang, Fengzhen;Du, Jun;Zhu, Jinsong;
7:2:114:2     Systematic variations in structural and electronic properties of BiFeO3 by A-site substitution
DOI:10.1063/1.3279137  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Zhang, Zhen;Wu, Ping;Chen, Lang;Wang, Junling;
7:2:114:3     Engineering polarization rotation in ferroelectric bismuth titanate
DOI:10.1063/1.4804367  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Roy, Amritendu;Prasad, Rajendra;Auluck, Sushil;Garg, Ashish;
7:2:114:4     Thermodynamics of multiferroic BiFeO3: Applications for the deposition of BiFeO3 thin films
DOI:10.1063/1.3573809  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Mei, Zhi-Gang;Shang, ShunLi;Wang, Yi;Liu, Zi-Kui;
7:2:114:5     Pyrochlore-Free Pb(Ni1/3Nb2/3)O-3-PbTiO3 Ceramics with Superior Piezoelectric Properties Synthesized Using an Optimized Polyethylene Glycol-Assisted Solid-State Reaction
DOI:10.1111/j.1551-2916.2010.03732.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Ye, Yin;Huang, Haitao;Zhou, Limin;Wang, Song;Yu, Shuhui;
7:2:114:6     Enhanced Unipolar Fatigue Resistance in Ferroelectric Pb(Ni1/3Nb2/3O3)-PbTiO3 Ceramics Prepared via Glycerol-Assisted Solid-State Reaction
DOI:10.1111/j.1551-2916.2010.04102.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:1  AU: Ye, Yin;Huang, Haitao;Zhou, Limin;Mai, Yiu-Wing;
7:2:114:7     Pyrochlore-Free Ferroelectric 0.64Pb(Ni1/3Nb2/3)O-3-0.36PbTiO(3) Ceramics Synthesized by the Combustion Method
DOI:10.1111/jace.12934  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Wang, Jianlin;Tang, Jian;Lei, Zhiwei;Liu, Min;Knize, Randy J.;Lu, Yalin;
7:2:115:1     Multiferroic based reddish brown pigments: Bi1-xMxFeO3 (M=Y and La) for coloring applications
DOI:10.1016/j.ceramint.2013.07.141  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: James, Vineetha;Rao, P. Prabhakar;Sameera, S.;Divya, S.;
7:2:115:2     Synthesis and optical properties of Ce0.95Pr0.05-xMxO2 (M = Mn, Si) as potential ecological red pigments for coloration of plastics
DOI:10.1016/j.ceramint.2012.01.057  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Kumari, L. Sandhya;Rao, P. Prabhakar;Sameera, S.;Koshy, Peter;
7:2:115:3     Influence of La Doping on Magnetic and Optical Properties of Bismuth Ferrite Nanofibers
DOI:10.1155/2012/238605  JN:JOURNAL OF NANOMATERIALS  PY:2012
  TC:6  AU: Zhang, Ziang;Liu, Haiyang;Lin, Yuanhua;Wei, Yan;Nan, Ce-Wen;Deng, Xuliang;
7:2:115:4     Tunable atomic termination in nano-necklace BiFeO3
DOI:10.1063/1.4864185  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Sobhan, Mushtaq;Xu, Qiang;Yang, Qian;Anariba, Franklin;Wu, Ping;
7:2:115:5     Red Pigments Based on CeO2-MO2-Pr6O11 (M=Zr and Sn): Solid Solutions for the Coloration of Plastics
DOI:10.1111/j.1551-2916.2009.03569.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Kumari, Leela Sandhya;Rao, Padala Prabhakar;Koshy, Peter;
7:2:115:6     Ferromagnetic and photocatalytic behaviors observed in Ca-doped BiFeO3 nanofibres
DOI:10.1063/1.4801796  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Feng, Yan-Nan;Wang, Huan-Chun;Luo, Yi-Dong;Shen, Yang;Lin, Yuan-Hua;
7:2:115:7     Red ceramic pigments of terbium-doped ceria prepared through classical and non-conventional coprecipitation routes
DOI:10.1016/j.jeurceramsoc.2009.08.005  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:15  AU: Llusar, M.;Vitaskova, L.;Sulcova, P.;Tena, M. A.;Badenes, J. A.;Monros, G.;
7:2:115:8     Y-Doped Bi2MoO6 Yellow Pigments for the Coloration of Plastics
DOI:10.1111/j.1551-2916.2010.04268.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Kumari, Leela Sandhya;Gayathri, Thozhuthungal Haridasan;Sameera, Saithathul Fathimah;Rao, Padala Prabhakar;
7:2:116:1:1     Modeling of dielectric and piezoelectric response of 1-3 type piezocomposites
DOI:10.1063/1.4748057  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Jayendiran, R.;Arockiarajan, A.;
7:2:116:1:2     Viscoelastic modeling and experimental characterization of thermo-electromechanical response of 1-3 piezocomposites
DOI:10.1063/1.4903287  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Jayendiran, R.;Arockiarajan, A.;
7:2:116:1:3     A micromechanical formulation for piezoelectric fiber composites with nonlinear and viscoelastic constituents
DOI:10.1016/j.actamat.2010.02.007  JN:ACTA MATERIALIA  PY:2010
  TC:23  AU: Muliana, Anastasia H.;
7:2:116:1:4     Nonlinear electromechanical coupling behavior of 1-3 piezoelectric composites
DOI:10.1016/j.actamat.2011.05.026  JN:ACTA MATERIALIA  PY:2011
  TC:11  AU: Zhao, Ping;Cao, Yang;Li, Jackie;
7:2:116:1:5     A thermodynamically motivated model for ferroelectric ceramics with grain boundary effects
DOI:10.1088/0964-1726/19/1/015008  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:4  AU: Arockiarajan, A.;Sivakumar, S. M.;Sansour, C.;
7:2:116:2:1     An analytical model for predicting thermo-electro-mechanical response of 1-3 piezoelectric composites
DOI:10.1016/j.commatsci.2010.03.027  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2010
  TC:12  AU: Sakthivel, M.;Arockiarajan, A.;
7:2:116:2:2     An analytical model for predicting the effective properties of magneto-electro-elastic (MEE) composites
DOI:10.1016/j.commatsci.2012.07.003  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:2  AU: Pakam, Naresh;Arockiarajan, A.;
7:2:116:2:3     A hierarchical multiscale approach for predicting thermo-electro-mechanical behavior of heterogeneous piezoelectric smart materials
DOI:10.1016/j.commatsci.2014.01.059  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: Lv, Jun;Yang, Kai;Zhang, Hongwu;Yang, Dongsheng;Huang, Yi;
7:2:117:1     Local temperature measurements on nanoscale materials using a movable nanothermocouple assembled in a transmission electron microscope
DOI:10.1088/0957-4484/22/48/485707  JN:NANOTECHNOLOGY  PY:2011
  TC:7  AU: Kawamoto, Naoyuki;Wang, Ming-Sheng;Wei, Xianlong;Tang, Dai-Ming;Murakami, Yasukazu;Shindo, Daisuke;Mitome, Masanori;Golberg, Dmitri;
7:2:117:2     A novel nano-scale non-contact temperature measurement technique for crystalline materials
DOI:10.1088/0957-4484/23/46/465707  JN:NANOTECHNOLOGY  PY:2012
  TC:2  AU: Wu, Xiaowei;Hull, Robert;
7:2:117:3     The material dependence of temperature measurement resolution in thermal scanning electron microscopy
DOI:10.1063/1.4798285  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Wu, Xiaowei;Hull, Robert;
7:2:117:4     Quantification of electron-phonon scattering for determination of temperature variations at high spatial resolution in the transmission electron microscope
DOI:10.1088/0957-4484/23/20/205705  JN:NANOTECHNOLOGY  PY:2012
  TC:3  AU: He, Li;Hull, Robert;
7:2:117:5     Local conductivity and electric field analysis of Ag-based conductive adhesive by transmission electron microscopy
DOI:10.1063/1.3305637  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Kawamoto, N.;Murakami, Y.;Shindo, D.;
7:2:117:6     Transmission Electron Microscopy Study on Microstructure of Ag-Based Conductive Adhesives
DOI:10.2320/matertrans.MJ201022  JN:MATERIALS TRANSACTIONS  PY:2010
  TC:2  AU: Kawamoto, Naoyuki;Murakami, Yasukazu;Shindo, Daisuke;Hayasaka, Yuichiro;Kan, Takeshi;Suganuma, Katsuaki;
7:2:118:1     Piezoresponse behavior of niobium doped bismuth ferrite thin films grown by chemical method
DOI:10.1016/j.jallcom.2009.12.113  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:14  AU: Simoes, A. Z.;Garcia, Filiberto Gonzalez;Riccardi, C. S.;
7:2:118:2     Effects of Mn substitution on ferro- and piezoelectric properties of Bi0.86Sm0.14FeO3 thin films
DOI:10.1016/j.jallcom.2011.01.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Yin, Zaimei;Liu, Jingjing;Hu, Guangda;Wu, Weibing;Yang, Changhong;
7:2:118:3     High and tunable piezoelectric coefficients in 0.675Pb(Mg1/3Nb2/3)O-3-0.325PbTiO(3) ceramics
DOI:10.1016/j.materresbull.2012.05.053  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:0  AU: Venet, Michel;Zabotto, Fabio Luis;Eiras, Jose Antonio;Garcia, Ducinei;
7:2:118:4     Enhanced ferro-and piezoelectric properties of a sol-gel derived BiFe0.95Mn0.05O3 thin film on Bi2O3-buffered Pt/Ti/SiO2/Si substrate
DOI:10.1016/j.jcrysgro.2011.10.010  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:7  AU: Li, Dehui;Sun, Xiaoqiang;Chuai, Xiaohong;Wu, Zhifa;Cao, Zijian;Yan, Yunfei;Zhang, Daming;
7:2:119:1:1     Unusual Urbach tail in TlGaSe2 ferroelectric-semiconductor with incommensurate phase
DOI:10.1063/1.4765736  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Seyidov, MirHasan Yu;Suleymanov, Rauf A.;Sale, Yasin;
7:2:119:1:2     Anisotropy of band gap absorption in TlGaSe2 semiconductor by ferroelectric phase transformation
DOI:10.1063/1.4904884  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Gulbinas, Karolis;Grivickas, Vytautas;Gavryushin, Vladimir;
7:2:119:1:3     Memory effect and new polarized state in the incommensurate phase of TlGaSe2 ferroelectric-semiconductor
DOI:10.1063/1.3606465  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Seyidov, MirHasan Yu.;Suleymanov, Rauf A.;Yakar, Emin;Sahin, Yasin;Acikgoz, Muhammed;
7:2:119:1:4     Enhanced excitonic photoconductivity due to built-in internal electric field in TlGaSe2 layered semiconductor
DOI:10.1063/1.4903051  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Seyidov, MirHasan Yu.;Suleymanov, Rauf A.;Sale, Yasin;Balaban, Ertan;
7:2:119:2:1     Crystal structure of Yb2CuGe6 and Yb3Cu4Ge4 and the valency of ytterbium
DOI:10.1016/j.jallcom.2013.11.224  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Peter, Sebastian C.;Subbarao, Udumula;Sarkar, Sumanta;Vaitheeswaran, G.;Svane, Axel;Kanatzidis, Mercouri G.;
7:2:119:2:2     Anomalous Thermal Expansion in the Square-Net Compounds RE4TGe8 (RE = Yb, Gd; T = Cr-Ni, Ag)
DOI:10.1021/ja204971n  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:13  AU: Peter, Sebastian C.;Chondroudi, Maria;Malliakas, Christos D.;Balasubramanian, Mahalingam;Kanatzidis, Mercouri G.;
7:2:119:2:3     Yb4LiGe4 - A Yb mixed valent Zintl phase with strong electronic correlations
DOI:10.1016/j.jallcom.2011.11.148  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Peter, Sebastian C.;Disseler, Steven M.;Svensson, J. Niclas;Carretta, Pietro;Graf, Michael J.;
7:2:119:2:4     Magnetic and transport properties of single-crystal Yb3Cu4Ge4
DOI:10.1016/j.jmmm.2012.04.044  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Katoh, Kenichi;Maeda, Masafumi;Matsuda, Saori;Ochiai, Akira;
7:2:119:3:1     Charge disproportionation in TlGaSe2 crystals detected by dielectric spectroscopy
DOI:10.1063/1.3486219  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Seyidov, MirHasan Yu;Suleymanov, Rauf A.;Bakis, Yakub;Salehli, Ferid;
7:2:119:3:2     Negative thermal expansion due to negative area compressibility in TlGaSe2 semiconductor with layered crystalline structure
DOI:10.1063/1.3486211  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Seyidov, MirHasan Yu.;Suleymanov, Rauf A.;
7:2:120:1     Pyroelectric scanning probe microscopy: A method for local measurement of the pyroelectric effect in ferroelectric thin films
DOI:10.1103/PhysRevB.82.054112  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Groten, J.;Zirkl, M.;Jakopic, G.;Leitner, A.;Stadlober, B.;
7:2:120:2     Polarization imaging in ferroelectric polymer thin film capacitors by pyroelectric scanning microscopy
DOI:10.1063/1.4875960  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Song, Jingfeng;Lu, Haidong;Gruverman, Alexei;Ducharme, S.;
7:2:120:3     Polarization patterning by laser-induced phase change in ferroelectric polymer films
DOI:10.1007/s00339-011-6329-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:1  AU: Othon, C. M.;Ducharme, Stephen;
7:2:120:4     A self-sustaining micro thermomechanic-pyroelectric generator
DOI:10.1063/1.3633350  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: Ravindran, S. K. T.;Huesgen, T.;Kroener, M.;Woias, P.;
7:2:120:5     Electrostatic force microscopy as a broadly applicable method for characterizing pyroelectric materials
DOI:10.1088/0957-4484/23/23/235701  JN:NANOTECHNOLOGY  PY:2012
  TC:1  AU: Martin-Olmos, Cristina;Stieg, Adam Z.;Gimzewski, James K.;
7:2:121:1     Size effect in ferroelectrics: Competition between geometrical and crystalline symmetries
DOI:10.1103/PhysRevB.83.014104  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Wang, Jin;Tagantsev, Alexander K.;Setter, Nava;
7:2:121:2     Switching Properties of Nano-Scale Multi-Axial Ferroelectrics: Geometry and Interface Effects
DOI:10.1080/10584587.2012.663617  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:6  AU: Baudry, Laurent;Luk'yanchuk, Igor A.;Sene, Anais;
7:2:121:3     Dependence of Curie temperature on the thickness of an ultrathin ferroelectric film
DOI:10.1103/PhysRevB.81.064105  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Almahmoud, Emad;Kornev, Igor;Bellaiche, L.;
7:2:121:4     Pressure effect on the ferroelectric phase transition in nanosized NH4HSO4
DOI:10.1063/1.4742017  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Cizman, Agnieszka;Marciniszyn, Tomasz;Poprawski, Ryszard;
7:2:121:5     Polarization vortex domains induced by switching electric field in ferroelectric films with circular electrodes
DOI:10.1103/PhysRevB.90.024102  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Baudry, Laurent;Sene, Anais;Luk'yanchuk, Igor A.;Lahoche, Laurent;Scott, James F.;
7:2:121:6     Monte Carlo Investigation of Critical Properties of Ferroelectric Films: The DIFFOUR Hamiltonian Framework
DOI:10.1080/00150193.2011.594004  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Laosiritaworn, Yongyut;Kanchiang, Kanokwan;Yimnirun, Rattikorn;
7:2:121:7     Phase transition and anisotropic conductivity in guanidine zinc sulfate crystals
DOI:10.1016/j.ssi.2011.05.021  JN:SOLID STATE IONICS  PY:2011
  TC:4  AU: Czapla, Z.;Komar, J.;Marciniszyn, T.;Poprawski, R.;
7:2:122:1     Density functional calculations of the structural, electronic, and ferroelectric properties of high-k titanate Re2Ti2O7 (Re=La and Nd)
DOI:10.1063/1.3459891  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Bruyer, Emilie;Sayede, Adlane;
7:2:122:2     Ab initio study of metastable layered perovskites R2Ti2O7 (R = Sm and Gd)
DOI:10.1103/PhysRevB.86.125136  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Sayede, Adlane;Bruyer, Emilie;Springborg, Michael;
7:2:122:3     Electronic and optical properties of layered RE2Ti2O7 (RE = Ce and Pr) from first principles
DOI:10.1063/1.4803124  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Sayede, A.;Khenata, R.;Chahed, A.;Benhelal, O.;
7:2:122:4     Lanthanum titanium perovskite compound: Thin film deposition and high frequency dielectric characterization
DOI:10.1016/j.tsf.2013.11.124  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Le Paven, C.;Lu, Y.;Nguyen, H. V.;Benzerga, R.;Le Gendre, L.;Rioual, S.;Benzegoutta, D.;Tessier, F.;Chevire, F.;Sharaiha, A.;Delaveaud, C.;Castel, X.;
7:2:122:5     Termination effects in electric field polarization of periodic quasi-one-dimensional systems
DOI:10.1103/PhysRevB.82.165442  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Springborg, Michael;Tevekeliyska, Violina;Kirtman, Bernard;
7:2:122:6     Piezoelectric and dielectric properties of Ce substituted La2Ti2O7 ceramics
DOI:10.1016/j.jeurceramsoc.2012.11.015  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Gao, Z. P.;Yan, H. X.;Ning, H. P.;Wilson, R.;Wei, X. Y.;Shi, B.;Ye, H.;Reece, M. J.;
7:2:123:1     Effect of deposition temperature on surface morphology and magnetic properties in epitaxial CoFe2O4 thin films deposited by metal organic chemical vapor deposition
DOI:10.1063/1.3312011  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Pan, M.;Bai, G.;Liu, Y.;Hong, S.;Dravid, V. P.;Petford-Long, A. K.;
7:2:123:2     Structure-property relationships in self-assembled metalorganic chemical vapor deposition-grown CoFe2O4-PbTiO3 multiferroic nanocomposites using three-dimensional characterization
DOI:10.1063/1.3615888  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Pan, Mengchun;Liu, Yuzi;Bai, Guoren;Hong, Seungbum;Dravid, Vinayak P.;Petford-Long, Amanda K.;
7:2:123:3     Microstructure and magnetic properties of a novel spinel (Zn,Co)Fe2O4 thin film on the SrTiO3 substrate
DOI:10.1016/j.jcrysgro.2010.09.077  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:1  AU: Wang, Yan;Li, D. F.;Dai, J. Y.;
7:2:124:1     Thickness dependent magnetic properties of BiFeO3 thin films prepared by pulsed laser deposition
DOI:10.1016/j.matlet.2011.05.060  JN:MATERIALS LETTERS  PY:2011
  TC:7  AU: Raghavender, A. T.;Nguyen Hoa Hong;Park, Chulkwon;Jung, Myung-Hwa;Lee, Kyu Joon;Lee, Daesu;
7:2:124:2     Thickness-dependent structural and magnetic properties of BiFeO3 films prepared by metal organic decomposition method
DOI:10.1063/1.3519986  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Huang, Fengzhen;Lu, Xiaomei;Lin, Weiwei;Kan, Yi;Zhang, Junting;Chen, Qingdong;Wang, Zhe;Li, Liben;Zhu, Jinsong;
7:2:124:3     Electronic Structure of BiFe1-xMnxO3 Thin Films Investigated by X-Ray Absorption Spectroscopy
DOI:10.1155/2012/123438  JN:JOURNAL OF NANOMATERIALS  PY:2012
  TC:1  AU: Ablat, Abduleziz;Muhemmed, Emin;Si, Cheng;Wang, Jiaou;Qian, Haijie;Wu, Rui;Zhang, Nian;Wu, Rong;Ibrahim, Kurash;
7:2:124:4     The influence of epitaxial strain on magnetic and electrical properties of BiFeO3 thin films
DOI:10.1016/j.tsf.2009.12.075  JN:THIN SOLID FILMS  PY:2010
  TC:1  AU: Kartavtseva, M. S.;Gorbenko, O. Yu;Kaul, A. R.;Murzina, T. V.;
7:2:125:1     Dielectric and ferroelectric properties and electric conductivity of sol-gel derived PBZT ceramics
DOI:10.1016/j.jallcom.2011.02.046  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Bochenek, D.;Skulski, R.;Wawrzala, P.;Brzezinska, D.;
7:2:125:2     Multiferroic Ceramic Composites Based on PZT Type Ceramic and NiZnFe Ferrite
DOI:10.1080/00150193.2013.822295  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Bochenek, D.;Niemiec, P.;Wawrzala, P.;Chrobak, A.;
7:2:125:3     Preparation and the temperature dependence of electromechanical properties of Ca2+-W6+ co-doped Pb(Zr,Ti)O-3 ceramics
DOI:10.1016/j.jallcom.2010.01.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:2  AU: Cao, Zhenzhu;Li, Guorong;Or, Siu Wing;Zeng, Jiangtao;Zheng, Liaoying;Yin, Qingrui;
7:2:125:4     Comparison study of macro and micro scale AC and DC conductivity measurements with Impedance Spectroscopy and Atomic Force Microscopy techniques applied in PBZT ceramics
DOI:10.1016/j.ceramint.2011.12.010  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Kozielski, L.;Adamczyk, M.;Pilch, M.;
7:2:125:5     Covariant hysteretic constitutive theory for Maxwell's equations: application to axially rotating media
DOI:10.1080/14786435.2013.858835  JN:PHILOSOPHICAL MAGAZINE  PY:2014
  TC:0  AU: Hale, Alison C.;Tucker, Robin W.;
7:2:126:1     Effect of ultraviolet radiation on slow-relaxation processes in ferroelectric capacitance structures
DOI:10.1063/1.3327236  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Petrov, P. K.;Alford, N. McN;Kozyrev, A.;Gaidukov, M.;Altynnikov, A.;Vasilevskiy, A.;Konoplev, G.;Tumarkin, A.;Gagarin, A.;
7:2:126:2     Ferroelectric Strontium Titanate Thin Films for Microwave Applications
DOI:10.1080/00150193.2012.743847  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Tumarkin, A. V.;Gaidukov, M. M.;Gagarin, A. G.;Samoilova, T. B.;Kozyrev, A. B.;
7:2:126:3     Impact of total ionizing dose irradiation on electrical property of ferroelectric-gate field-effect transistor
DOI:10.1063/1.4878416  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yan, S. A.;Xiong, Y.;Tang, M. H.;Li, Z.;Xiao, Y. G.;Zhang, W. L.;Zhao, W.;Guo, H. X.;Ding, H.;Chen, J. W.;Zhou, Y. C.;
7:2:126:4     Influence of Sr+2 concentrations on growth of SrTiO3 thin films synthesized by hydrothermal-galvanic couple method
DOI:10.1016/j.tsf.2014.02.035  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Tsai, Yu-Hsiang;Chieh, Yu-Chih;Lu, Fu-Hsing;
7:2:126:5     Hydrothermal-galvanic couple synthesis of directionally oriented BaTiO3 thin films on TiN-coated substrates
DOI:10.1016/j.tsf.2013.06.060  JN:THIN SOLID FILMS  PY:2013
  TC:3  AU: Yang, Chia-Jung;Tsai, Di-You;Chan, Pei-Hsuan;Wu, Chu-Tsun;Lu, Fu-Hsing;
7:2:127:1     Study of spin glass and cluster ferromagnetism in RuSr2Eu1.4Ce0.6Cu2O10-delta magneto superconductor
DOI:10.1063/1.3626824  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Kumar, Anuj;Tandon, R. P.;Awana, V. P. S.;
7:2:127:2     Magnetic phase separation and cluster-spin-glass behavior in LaMn1-xFexO3+y
DOI:10.1063/1.3364056  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: de Lima, O. F.;Coaquira, J. A. H.;de Almeida, R. L.;Malik, S. K.;
7:2:127:3     Evidence of a cluster glass-like behavior in Fe-doped ZnO nanoparticles
DOI:10.1063/1.4864246  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ramos, J. E.;Montero-Munoz, M.;Coaquira, J. A. H.;Rodriguez-Paez, J. E.;
7:2:127:4     Crossing point phenomena (T-star=2.7 K) in specific heat curves of superconducting ferromagnets RuSr2Gd1.4Ce0.6Cu2O10-delta
DOI:10.1063/1.3677868  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Kumar, Anuj;Tandon, R. P.;Wang, Jianli;Zeng, Rong;Awana, V. P. S.;
7:2:127:5     Spin dynamics, short-range order and superparamagnetism in superconducting ferromagnet RuSr2Gd1.4Ce0.6Cu2O10-delta
DOI:10.1016/j.jmmm.2013.08.037  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Kumar, Anuj;Tandon, R. P.;Awana, V. P. S.;
7:2:128:1     Ultrasonic investigation of the Jahn-Teller effect in GaAs semiconductors doped by transition metals
DOI:10.1063/1.4895475  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Averkiev, N. S.;Bersuker, I. B.;Gudkov, V. V.;Baryshnikov, K. A.;Zhevstovskikh, I. V.;Mayakin, V. Yu.;Monakhov, A. M.;Sarychev, M. N.;Sedov, V. E.;Surikov, V. T.;
7:2:128:2     Class of Molecular and Solid State Systems with Correlated Magnetic and Dielectric Bistabilities Induced by the Pseudo Jahn-Teller Effect
DOI:10.1103/PhysRevLett.106.246406  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:12  AU: Garcia-Fernandez, Pablo;Bersuker, Isaac B.;
7:2:128:3     Acoustic evidence of distinctive temperatures in relaxor-multiferroics
DOI:10.1063/1.4863795  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Smirnova, E.;Sotnikov, A.;Ktitorov, S.;Zaitseva, N.;Schmidt, H.;Weihnacht, M.;
7:2:129:1     Variations in the microstructure and properties of multicomponent ferroelectric ceramics as a result of its modification by barium
DOI:10.1016/j.ceramint.2014.06.119  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Reznichenko, L. A.;Alyoshin, V. A.;Shilkina, L. A.;Talanov, M. V.;Dudkina, S. I.;
7:2:129:2     Dielectric and pyroelectric properties of Ba-modified lead lanthanum zirconate stannate titanate ceramics
DOI:10.1016/j.mseb.2011.03.006  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:6  AU: Zhang, Qingfeng;Jiang, Shenglin;Zeng, Yike;Xie, Zhenzhen;Fan, Maoyan;Zhang, Guangzu;Zhang, Yangyang;Yu, Yan;Wang, Jing;Qin, Xiaoye;
7:2:129:3     The PZT system (PbZr(1-x)TixO(3), 0.0 <= x <= 1.0): Specific features of recrystallization sintering and microstructures of solid solutions (Part 1)
DOI:10.1016/j.ceramint.2012.06.088  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Andryushina, I. N.;Reznichenko, L. A.;Alyoshin, V. A.;Shilkina, L. A.;Titov, S. V.;Titov, V. V.;Andryushin, K. P.;Dudkina, S. I.;
7:2:129:4     Preparation, structure and piezoelectric properties of PZN-PMN-PT ceramics in the composition range of large PZN concentrations
DOI:10.1016/j.ceramint.2012.01.033  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Reznitchenko, L. A.;Verbenko, I. A.;Razumovskaya, O. N.;Shilkina, L. A.;Bokov, A. A.;Miller, A. I.;Talanov, M. V.;
7:2:129:5     The PZT system (PbTixZr1-xO3, 0 <= x <= 1.0): The dependences of electrophysical properties of solid solutions on the electric field strength and component concentration (Part 5)
DOI:10.1016/j.ceramint.2013.02.100  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Andryushina, I. N.;Reznichenko, L. A.;Shilkina, L. A.;Andryushin, K. P.;Yurasov, Yu I.;Dudkina, S. I.;
7:2:129:6     Dielectric and pyroelectric properties of Ba-modified lead lanthanum zirconate stannate titanate ceramics (vol 176, pg 816, 2011)
DOI:10.1016/j.mseb.2012.01.001  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:0  AU: Zhang, Qingfeng;Jiang, Shenglin;Zeng, Yike;Xie, Zhenzhen;Fan, Maoyan;Zhang, Guangzu;Zhang, Yangyang;Yu, Yan;Wang, Jing;Qin, Xiaoye;
7:2:130:1     Effects of B-site chemistry on BiFeO3-containing enhanced tetragonality systems
DOI:10.1063/1.3659298  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Stein, David M.;Davies, Peter K.;
7:2:130:2     Multiple dielectric transitions in the PbTiO3-Bi(Zn1/2Ti1/2)O-3-Bi(Mg1/2Ti1/2)O-3 system
DOI:10.1063/1.3646559  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Stein, David M.;Grinberg, Ilya;Rappe, Andrew M.;Davies, Peter K.;
7:2:130:3     Characterization of the High-Temperature Ferroelectric (100-x-y)BiScO3-( x) Bi(Zr0.5Zn0.5)O-3-(y)PbTiO3 Perovskite Ternary Solid Solution
DOI:10.1111/jace.12648  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Kowalski, Ben A.;Sehirlioglu, Alp;Dynys, Fred W.;Sayir, Ali;
7:2:131:1     Origin of the uniaxial magnetic anisotropy in La0.7Sr0.3MnO3 on stripe-domain BiFeO3
DOI:10.1103/PhysRevB.88.184426  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:2:131:2     Preparation of a heteroepitaxial LaxSryMnzO3/BiFeO3 bilayer by r.f. magnetron sputtering with various oxygen gas flow ratios
DOI:10.1063/1.4893998  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Naganuma, H.;Ichinose, T.;Begum, H. A.;Sato, S.;Han, X. F.;Miyazaki, T.;Bae, In-T.;Oogane, M.;Ando, Y.;
7:2:132:1     Calculations on switching characteristics of ferroelectric-paraelectric superlattices
DOI:10.1016/j.ceramint.2011.04.036  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Ong, Lye-Hock;Lee, Thong-Yan;Chew, Khian-Hooi;
7:2:132:2     Modeling Dynamic Ferroelectric Behavior with the Analytical Landau Theory
DOI:10.1080/00150193.2013.814443  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Loh, Kok-Khuan;Ong, Lye-Hock;Chew, Khian-Hooi;
7:2:132:3     Analytical Landau-type model of polarization switching in ferroelectrics
DOI:10.1016/j.ceramint.2012.10.084  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Loh, Kok-Khuan;Ong, Lye-Hock;Chew, Khian-Hooi;
7:2:132:4     Effects of Electric Fields on Bilayer Ferroelectric Films
DOI:10.1080/00150191003679615  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Ong, Lye-Hock;Lee, Thong-Yan;
7:2:133:1     Proper Permittivity for Depolarization Field in Perfectly Insulating Ferroelectric and Examination of Background Permittivity
DOI:10.1080/00150193.2014.889540  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Watanabe, Y.;
7:2:133:2     Apparent Closure Domain by Standard 180 degrees Domain Theory and Necessity of Fundamental Screening in the Theory
DOI:10.1080/00150191003670432  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Watanabe, Yukio;
7:2:133:3     Appropriate Value of Permittivity for Depolarization Field and Universal Instability of Insulating Ferroelectric Phase in Single-Domain State
DOI:10.1080/00150193.2010.484328  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Watanabe, Yukio;
7:2:133:4     Examination of Consistency of Intrinsic 2D Conduction Layer on BaTiO3 in Extreme Clean Limit with Ferroelectric Basics
DOI:10.1080/00150193.2012.677685  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Watanabe, Yukio;
7:2:134:1     Dielectric Properties of BaTiO3-Modified BiFeO3 Ceramics
DOI:10.1080/00150193.2010.492724  JN:FERROELECTRICS  PY:2011
  TC:10  AU: Chandarak, Sujittra;Ngamjarurojana, Athipong;Srilomsak, Suthum;Laoratanakul, Pitak;Rujirawat, Saroj;Yimnirun, Rattikorn;
7:2:134:2     Magnetoelectric Properties of Cu- and Mn-Doped 0.75BiFeO(3)-0.25BaTiO(3) Multiferroic Ceramics
DOI:10.1080/00150193.2011.594739  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Chandarak, S.;Pojprapai, S.;Srilomsak, S.;Jantaratana, P.;Rujirawat, S.;Yimnirun, R.;
7:2:134:3     Effects of Mn and Cu Doping on Electrical Properties of 0.75BiFeO(3)-0.25BaTiO(3) Ceramics
DOI:10.1080/10584587.2010.488192  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:3  AU: Chandarak, S.;Ngamjarurojana, A.;Pojprapai, S.;Srilomsak, S.;Rujirawat, S.;Yimnirun, R.;
7:2:135:1     Asymptotic Description of the Time and Temperature Hysteresis in the Framework of Landau-Khalatnikov Equation
DOI:10.1080/00150193.2014.889544  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Starkov, A.;Starkov, I.;
7:2:135:2     Impact of the Pyroelectric Effect on Ferroelectric Phase Transitions
DOI:10.1080/00150193.2012.674413  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Starkov, Alexander;Pakhomov, Oleg;Starkov, Ivan;
7:2:135:3     Temperature hysteresis of the capacitance dependence C(T) for ferroelectric ceramics
DOI:10.1116/1.3532944  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:2  AU: Dedyk, Antonina;Pavlova, Yulia;Karmanenko, Sergey;Semenov, Alexander;Semikin, Dmitry;Pakhomov, Oleg;Starkov, Alexander;Starkov, Ivan;
7:2:136:1     Much simplified ion-beam assisted deposition-TiN template for high-performance coated conductors
DOI:10.1063/1.3499270  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Xiong, J.;Matias, V.;Wang, H.;Zhai, J. Y.;Maiorov, B.;Trugman, D.;Tao, B. W.;Li, Y. R.;Jia, Q. X.;
7:2:136:2     Morphology evolvement of CeO2 cap layer for coated conductors
DOI:10.1016/j.apsusc.2012.09.094  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:2  AU: Xia, Yudong;Xiong, Jie;Zhang, Fei;Xue, Yan;Wang, Lili;Guo, Pei;Xu, Pengju;Zhao, Xiaohui;Tao, Bowan;
7:2:136:3     Double-sided reel-to-reel metal-organic chemical vapor deposition system of YBa2Cu3O7-delta thin films
DOI:10.1116/1.4884367  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2014
  TC:1  AU: Zhang, Fei;Xiong, Jie;Liu, Xin;Zhao, Ruipeng;Zhao, Xiaohui;Tao, Bowan;Li, Yanrong;
7:2:137:1     Controlled mechnical modification of manganite surface with nanoscale resolution
DOI:10.1088/0957-4484/25/47/475302  JN:NANOTECHNOLOGY  PY:2014
  TC:0  AU: Kelly, Simon J.;Kim, Yunseok;Eliseev, Eugene;Morozovska, Anna;Jesse, Stephen;Biegalski, Michael D.;Mitchell, J. F.;Zheng, H.;Aarts, J.;Hwang, Inrok;Oh, Sungtaek;Choi, Jin Sik;Choi, Taekjib;Park, Bae Ho;Kalinin, Sergei V.;Maksymovych, Peter;
7:2:137:2     Observation of Electronic Inhomogeneity and Charge Density Waves in a Bilayer La2-2xSr1+2xMn2O7 Single Crystal
DOI:10.1103/PhysRevLett.110.217203  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Kim, Jeehoon;Huang, Junwei;Zhou, J. -S.;Goodenough, J. B.;Zheng, H.;Mitchell, J. F.;de Lozanne, Alex;
7:2:138:1     Piezoelectric response around ferroelectric domain walls in crystals with engineered domain configuration
DOI:10.1103/PhysRevB.81.024114  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Guo, Haiyan;Bokov, Alexei A.;Ye, Zuo-Guang;
7:2:138:2     Ferroelectric materials for piezoelectric actuators by optimal design
DOI:10.1016/j.actamat.2011.02.005  JN:ACTA MATERIALIA  PY:2011
  TC:1  AU: Jayachandran, K. P.;Guedes, J. M.;Rodrigues, H. C.;
7:2:138:3     Optimal configuration of microstructure in ferroelectric materials by stochastic optimization
DOI:10.1063/1.3462450  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Jayachandran, K. P.;Guedes, J. M.;Rodrigues, H. C.;
7:2:139:1     Molten Salt Synthesis of Bismuth Ferrite Nano- and Microcrystals and their Structural Characterization
DOI:10.1111/jace.12897  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Zhu, Xinhua;Zhou, Jun;Jiang, Mengchao;Xie, Jun;Liang, Shuang;Li, Shuyi;Liu, Zidong;Zhu, Yingying;Zhu, Jianmin;Liu, Zhiguo;
7:2:139:2     Multiferroic properties of single-crystalline Bi0.8La0.2FeO3 microsized particles synthesized by molten salt method
DOI:10.1016/j.ceramint.2011.06.030  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:1  AU: Zhai, L.;Shi, Y. G.;Gao, J. L.;Tang, S. L.;Du, Y. W.;
7:2:139:3     Grain Size Effect on the Dielectric Properties of Molten Salt Synthesized BaTiO3
DOI:10.1080/00150191003711335  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Sahoo, Ganesh Kumar;Mazumder, Ranabrata;
7:2:140:1     Observation of Ferroelectric Domain Structure in TGS
DOI:10.1080/00150193.2011.554269  JN:FERROELECTRICS  PY:2011
  TC:9  AU: Nakatani, N.;
7:2:140:2     Ferroelectric-Paraelectric Phase Transition in Triglycine Sulphate via Piezoresponse Force Microscopy
DOI:10.1080/00150193.2012.671742  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Bdikin, I. K.;Wojtas, M.;Kiselev, D.;Isakov, D.;Kholkin, A. L.;
7:2:140:3     Dynamic Simulation of Polarization Reversal Processes in Ferroelectric Crystals under Electron Beam Irradiation
DOI:10.1080/00150193.2013.773855  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Maslovskaya, A.;Barabash, T.;
7:2:141:1     The effect of domain patterns on 180 degrees domain switching in BaTiO3 crystals during antiparallel electric field loading
DOI:10.1063/1.4863672  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Y. W.;Li, F. X.;
7:2:141:2     In-situ observation of needle domain evolution in barium titanate single crystals
DOI:10.1016/j.jeurceramsoc.2012.08.026  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Potnis, Prashant;Huber, John;
7:2:141:3     Synchrotron Mapping of Laminate Microstructures in Barium Titanate Single Crystals
DOI:10.1080/00150193.2011.594780  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Potnis, Prashant;Huber, John;Sutter, John;
7:2:142:1     Tailoring the nanoscale boundary cavities in rutile TiO2 hierarchical microspheres for giant dielectric performance
DOI:10.1039/c0jm01232g  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:25  AU: Hu, Wanbiao;Li, Liping;Tong, Wenming;Li, Guangshe;Yan, Tingjiang;
7:2:142:2     Pulsed laser deposition growth of rutile TiO2 nanowires on Silicon substrates
DOI:10.1016/j.apsusc.2014.05.123  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:2  AU: Nechache, R.;Nicklaus, M.;Diffalah, N.;Ruediger, A.;Rosei, F.;
7:2:143:1     Effects of Cu dilution in NiO on the magnetic properties of NiFe2O4/Ni1-xCuxO nanocomposites
DOI:10.1016/j.jallcom.2009.12.015  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:2  AU: Liu, K. L.;Yuan, S. L.;Yin, S. Y.;Tian, Z. M.;He, J. H.;Li, P.;Zheng, X. F.;Duan, H. N.;Huo, S. X.;Wang, C. H.;
7:2:143:2     Investigation of exchange bias in 0.1MFe(2)O(4)/0.9BiFeO(3) (M=Co, Cu, Ni) nanocomposite
DOI:10.1016/j.jmmm.2011.10.032  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:4  AU: He, J. H.;Guan, J. G.;Wang, W.;
7:2:143:3     Improved exchange bias of PtCr antiferromagnets with FeMn or Mn addition
DOI:10.1016/j.jallcom.2009.10.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:2  AU: Dai, B.;Lei, Y.;Shao, X. P.;Ni, J.;
7:2:144:1     Hydrothermal Synthesis of Perovskite Bismuth Ferrite Micro/Nano Powders
DOI:10.1080/10584587.2014.902668  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:1  AU: Song, Chun Yan;Xu, Jinbao;Yimamu, Aerpati;Wang, Lei;
7:2:144:2     Surfactant-free hydrothermal synthesis of submicron BiFeO3 powders
DOI:10.1007/s00339-010-6024-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:4  AU: Peng, Jianhong;Hojamberdiev, Mirabbos;Cao, Baowei;Wang, Juan;Xu, Yunhua;
7:2:145:1     Kelvin probe force microscopy for conducting nanobits of NiO thin films
DOI:10.1088/0957-4484/21/21/215704  JN:NANOTECHNOLOGY  PY:2010
  TC:5  AU: Son, J. Y.;Shin, Y-H;Kim, H.;Cho, J. H.;Jang, H.;
7:2:145:2     Analysis of the lateral resolution of electrostatic force gradient microscopy
DOI:10.1063/1.4752430  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Dunaevskiy, Mikhail;Alekseev, Prokhor;Girard, Paul;Lashkul, Alexander;Lahderanta, Erkki;Titkov, Alexander;
7:2:146:1     Study of the electric-pulse-induced resistive switching effects at Pt/PrBa2Cu3Ox interfaces by multi-electrode method
DOI:10.1063/1.4873170  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Yue, Ruihong;Sun, Xianwen;Wei, Ling;Yin, Yanfeng;Yin, Jiangtao;Zhang, Weifeng;
7:2:146:2     Electric-pulse-controlled Schottky-like/Ohmic contact for Ag/Nb-doped SrTiO3 junctions
DOI:10.1016/j.mssp.2013.03.006  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2013
  TC:1  AU: Ding, Tao;Fang, Yian;Chen, Liping;Huang, Shihua;Chen, Yuansha;
7:2:147:1     MOCVD growth and characterization of BiFeO3-Bi(Zn1/2Ti1/2)O-3 ferroelectric films
DOI:10.1016/j.mseb.2009.12.019  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:7  AU: Yazawa, Keisuke;Yasui, Shintaro;Matsushima, Masaaki;Uchida, Hiroshi;Funakubo, Hiroshi;
7:2:147:2     Phase transition of ferroelectric (LixNa1-x)NbO3 films with 0 <= x <= 0.13 by applying an electric field
DOI:10.1063/1.4795593  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Kohori, Akihiro;Yamazoe, Seiji;Imai, Takahito;Adachi, Hideaki;Wada, Takahiro;
7:2:148:1     Effect of Annealing on Ferroelectric Properties of Lanthanum Modified Lead Zirconate Titanate Thin Films
DOI:10.1080/10584587.2011.637011  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:3  AU: Harshan, V. N.;Kotru, Sushma;
7:2:148:2     Photovoltaic and Ferroelectric Properties of Pb0.95La0.05Zr0.54Ti0.46O3 Thin Films under Dark and Illuminated Conditions
DOI:10.1080/00150193.2014.922839  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Harshan, V. N.;Kotru, Sushma;
7:2:149:1     Magnetic structure and magneto-elastic-structural coupling in Cr-modified SrRuO3: A neutron powder diffraction study
DOI:10.1063/1.3554716  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Ranjan, Rajeev;Senyshyn, Anatoliy;Garg, Rohini;Boysen, Hans;
7:2:149:2     High pressure, mechanical, and optical properties of ZrW2O8
DOI:10.1063/1.3544487  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Ramzan, M.;Luo, W.;Ahuja, R.;
7:3:1:1     Tunable Rashba Spin-Orbit Interaction at Oxide Interfaces
DOI:10.1103/PhysRevLett.104.126803  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:154  AU: Caviglia, A. D.;Gabay, M.;Gariglio, S.;Reyren, N.;Cancellieri, C.;Triscone, J. -M.;
7:3:1:2     Creation and control of a two-dimensional electron liquid at the bare SrTiO3 surface
DOI:10.1038/nmat2943  JN:NATURE MATERIALS  PY:2011
  TC:140  AU: Meevasana, W.;King, P. D. C.;He, R. H.;Mo, S-K.;Hashimoto, M.;Tamai, A.;Songsiriritthigul, P.;Baumberger, F.;Shen, Z-X.;
7:3:1:3     Coexistence of Superconductivity and Ferromagnetism in Two Dimensions
DOI:10.1103/PhysRevLett.107.056802  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:128  AU: Dikin, D. A.;Mehta, M.;Bark, C. W.;Folkman, C. M.;Eom, C. B.;Chandrasekhar, V.;
7:3:1:4     Two-Dimensional Quantum Oscillations of the Conductance at LaAlO3/SrTiO3 Interfaces
DOI:10.1103/PhysRevLett.105.236802  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:76  AU: Caviglia, A. D.;Gariglio, S.;Cancellieri, C.;Sacepe, B.;Fete, A.;Reyren, N.;Gabay, M.;Morpurgo, A. F.;Triscone, J-M.;
7:3:1:5     Tuning Spin-Orbit Coupling and Superconductivity at the SrTiO3/LaAlO3 Interface: A Magnetotransport Study
DOI:10.1103/PhysRevLett.104.126802  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:79  AU: Ben Shalom, M.;Sachs, M.;Rakhmilevitch, D.;Palevski, A.;Dagan, Y.;
7:3:1:6     Spontaneous 2-Dimensional Carrier Confinement at the n-Type SrTiO3/LaAlO3 Interface
DOI:10.1103/PhysRevLett.106.166807  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:67  AU: Delugas, Pietro;Filippetti, Alessio;Fiorentini, Vincenzo;Bilc, Daniel I.;Fontaine, Denis;Ghosez, Philippe;
7:3:1:7     Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
DOI:10.1103/PhysRevB.87.161102  JN:PHYSICAL REVIEW B  PY:2013
  TC:23  AU: Zhong, Zhicheng;Toth, Anna;Held, Karsten;
7:3:1:8     Electrolyte Gate-Controlled Kondo Effect in SrTiO3
DOI:10.1103/PhysRevLett.107.256601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:40  AU: Lee, Menyoung;Williams, J. R.;Zhang, Sipei;Frisbie, C. Daniel;Goldhaber-Gordon, D.;
7:3:1:9     Theory of the SrTiO3 surface state two-dimensional electron gas
DOI:10.1103/PhysRevB.86.125121  JN:PHYSICAL REVIEW B  PY:2012
  TC:25  AU: Khalsa, Guru;MacDonald, A. H.;
7:3:1:10     Superconducting and Ferromagnetic Phases in SrTiO3/LaAlO3 Oxide Interface Structures: Possibility of Finite Momentum Pairing
DOI:10.1103/PhysRevLett.108.117003  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:61  AU: Michaeli, Karen;Potter, Andrew C.;Lee, Patrick A.;
7:3:1:11     Two-dimensional electron liquid state at LaAlO3-SrTiO3 interfaces
DOI:10.1103/PhysRevB.81.153414  JN:PHYSICAL REVIEW B  PY:2010
  TC:45  AU: Breitschaft, M.;Tinkl, V.;Pavlenko, N.;Paetel, S.;Richter, C.;Kirtley, J. R.;Liao, Y. C.;Hammerl, G.;Eyert, V.;Kopp, T.;Mannhart, J.;
7:3:1:12     First-Principles Modeling of Electrostatically Doped Perovskite Systems
DOI:10.1103/PhysRevLett.106.136803  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:36  AU: Stengel, Massimiliano;
7:3:1:13     Nonlinear Hall effect and multichannel conduction in LaTiO3/SrTiO3 superlattices
DOI:10.1103/PhysRevB.82.201407  JN:PHYSICAL REVIEW B  PY:2010
  TC:35  AU: Kim, J. S.;Seo, S. S. A.;Chisholm, M. F.;Kremer, R. K.;Habermeier, H. -U.;Keimer, B.;Lee, H. N.;
7:3:1:14     Subband Structure of a Two-Dimensional Electron Gas Formed at the Polar Surface of the Strong Spin-Orbit Perovskite KTaO3
DOI:10.1103/PhysRevLett.108.117602  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:36  AU: King, P. D. C.;He, R. H.;Eknapakul, T.;Buaphet, P.;Mo, S-K;Kaneko, Y.;Harashima, S.;Hikita, Y.;Bahramy, M. S.;Bell, C.;Hussain, Z.;Tokura, Y.;Shen, Z-X;Hwang, H. Y.;Baumberger, F.;Meevasana, W.;
7:3:1:15     Magnetic and superconducting ordering in one-dimensional nanostructures at the LaAlO3/SrTiO3 interface
DOI:10.1103/PhysRevB.87.014436  JN:PHYSICAL REVIEW B  PY:2013
  TC:12  AU: Fidkowski, Lukasz;Jiang, Hong-Chen;Lutchyn, Roman M.;Nayak, Chetan;
7:3:1:16     Electronic and Magnetic Properties of SrTiO3/LaAlO3 Interfaces from First Principles
DOI:10.1002/adma.200903800  JN:ADVANCED MATERIALS  PY:2010
  TC:51  AU: Chen, Hanghui;Kolpak, Alexie M.;Ismail-Beigi, Sohrab;
7:3:1:17     Dynamical Response and Confinement of the Electrons at the LaAlO3/SrTiO3 Interface
DOI:10.1103/PhysRevLett.104.156807  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:35  AU: Dubroka, A.;Roessle, M.;Kim, K. W.;Malik, V. K.;Schultz, L.;Thiel, S.;Schneider, C. W.;Mannhart, J.;Herranz, G.;Copie, O.;Bibes, M.;Barthelemy, A.;Bernhard, C.;
7:3:1:18     Phase Diagram of Electrostatically Doped SrTiO3
DOI:10.1103/PhysRevLett.106.136809  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:42  AU: Lee, Yeonbae;Clement, Colin;Hellerstedt, Jack;Kinney, Joseph;Kinnischtzke, Laura;Leng, Xiang;Snyder, S. D.;Goldman, A. M.;
7:3:1:19     Subband structure of two-dimensional electron gases in SrTiO3
DOI:10.1063/1.4831976  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Raghavan, Santosh;Allen, S. James;Stemmer, Susanne;
7:3:1:20     Oxygen vacancies at titanate interfaces: Two-dimensional magnetism and orbital reconstruction
DOI:10.1103/PhysRevB.86.064431  JN:PHYSICAL REVIEW B  PY:2012
  TC:22  AU: Pavlenko, N.;Kopp, T.;Tsymbal, E. Y.;Mannhart, J.;Sawatzky, G. A.;
7:3:1:21     Shubnikov-De Haas Oscillations in SrTiO3/LaAlO3 Interface
DOI:10.1103/PhysRevLett.105.206401  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:43  AU: Ben Shalom, M.;Ron, A.;Palevski, A.;Dagan, Y.;
7:3:1:22     Novel transport phenomena at complex oxide interfaces
DOI:10.1557/mrs.2013.262  JN:MRS BULLETIN  PY:2013
  TC:5  AU: Hilgenkamp, Hans;
7:3:1:23     Magnetic and superconducting phases at the LaAlO3/SrTiO3 interface: The role of interfacial Ti 3d electrons
DOI:10.1103/PhysRevB.85.020407  JN:PHYSICAL REVIEW B  PY:2012
  TC:34  AU: Pavlenko, N.;Kopp, T.;Tsymbal, E. Y.;Sawatzky, G. A.;Mannhart, J.;
7:3:1:24     Theory of t(2g) electron-gas Rashba interactions
DOI:10.1103/PhysRevB.88.041302  JN:PHYSICAL REVIEW B  PY:2013
  TC:15  AU: Khalsa, Guru;Lee, Byounghak;MacDonald, A. H.;
7:3:1:25     Field-effect devices utilizing LaAlO3-SrTiO3 interfaces
DOI:10.1063/1.3682102  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:32  AU: Foerg, B.;Richter, C.;Mannhart, J.;
7:3:1:26     Parallel Electron-Hole Bilayer Conductivity from Electronic Interface Reconstruction
DOI:10.1103/PhysRevLett.104.166804  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:43  AU: Pentcheva, R.;Huijben, M.;Otte, K.;Pickett, W. E.;Kleibeuker, J. E.;Huijben, J.;Boschker, H.;Kockmann, D.;Siemons, W.;Koster, G.;Zandvliet, H. J. W.;Rijnders, G.;Blank, D. H. A.;Hilgenkamp, H.;Brinkman, A.;
7:3:1:27     Experimental Evidence of Cubic Rashba Effect in an Inversion-Symmetric Oxide
DOI:10.1103/PhysRevLett.108.206601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:22  AU: Nakamura, H.;Koga, T.;Kimura, T.;
7:3:1:28     Origin of Interface Magnetism in BiMnO3/SrTiO3 and LaAlO3/SrTiO3 Heterostructures
DOI:10.1103/PhysRevLett.111.087204  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:19  AU: Salluzzo, M.;Gariglio, S.;Stornaiuolo, D.;Sessi, V.;Rusponi, S.;Piamonteze, C.;De Luca, G. M.;Minola, M.;Marre, D.;Gadaleta, A.;Brune, H.;Nolting, F.;Brookes, N. B.;Ghiringhelli, G.;
7:3:1:29     Two-dimensional electron gas in delta-doped SrTiO3
DOI:10.1103/PhysRevB.82.081103  JN:PHYSICAL REVIEW B  PY:2010
  TC:31  AU: Jalan, Bharat;Stemmer, Susanne;Mack, Shawn;Allen, S. James;
7:3:1:30     Origin and transport signatures of spin-orbit interactions in one- and two-dimensional SrTiO3-based heterostructures
DOI:10.1103/PhysRevB.87.245121  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Kim, Younghyun;Lutchyn, Roman M.;Nayak, Chetan;
7:3:1:31     Magnetic and transport signatures of Rashba spin-orbit coupling on the ferromagnetic Kondo lattice model in two dimensions
DOI:10.1103/PhysRevB.90.085107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Meza, Giovany A.;Riera, Jose A.;
7:3:1:32     Large band offset as driving force of two-dimensional electron confinement: The case of SrTiO3/SrZrO3 interface
DOI:10.1103/PhysRevB.88.115304  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Delugas, P.;Filippetti, A.;Gadaleta, A.;Pallecchi, I.;Marre, D.;Fiorentini, V.;
7:3:1:33     Charge density distribution and optical response of the LaAlO3/SrTiO3 interface
DOI:10.1103/PhysRevB.87.205145  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Park, Se Young;Millis, Andrew J.;
7:3:1:34     Optical conductivity of the t(2g) two-dimensional electron gas
DOI:10.1103/PhysRevB.89.245417  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Xie, Ming;Khalsa, Guru;MacDonald, A. H.;
7:3:1:35     Two-Dimensional Superconducting Phase in LaTiO3/SrTiO3 Heterostructures Induced by High-Mobility Carrier Doping
DOI:10.1103/PhysRevLett.108.247004  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:20  AU: Biscaras, J.;Bergeal, N.;Hurand, S.;Grossetete, C.;Rastogi, A.;Budhani, R. C.;LeBoeuf, D.;Proust, C.;Lesueur, J.;
7:3:1:36     Consequences of Oxygen-Vacancy Correlations at the SrTiO3 Interface
DOI:10.1103/PhysRevLett.113.157602  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Lin, Chungwei;Demkov, Alexander A.;
7:3:1:37     Functional oxide interfaces
DOI:10.1557/mrs.2013.282  JN:MRS BULLETIN  PY:2013
  TC:12  AU: Granozio, Fabio Miletto;Koster, Gertjan;Rijnders, Guus;
7:3:1:38     Gate-tuned superfluid density at the superconducting LaAlO3/SrTiO3 interface
DOI:10.1103/PhysRevB.86.060503  JN:PHYSICAL REVIEW B  PY:2012
  TC:16  AU: Bert, Julie A.;Nowack, Katja C.;Kalisky, Beena;Noad, Hilary;Kirtley, John R.;Bell, Chris;Sato, Hiroki K.;Hosoda, Masayuki;Hikita, Yasayuki;Hwang, Harold Y.;Moler, Kathryn A.;
7:3:1:39     Phase diagrams of voltage-gated oxide interfaces with strong Rashba coupling
DOI:10.1103/PhysRevB.89.195448  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Bucheli, D.;Grilli, M.;Peronaci, F.;Seibold, G.;Caprara, S.;
7:3:1:40     Electron correlation and magnetism at the LaAlO3/SrTiO3 interface: A DFT plus DMFT investigation
DOI:10.1103/PhysRevB.90.085125  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Lechermann, Frank;Boehnke, Lewin;Grieger, Daniel;Piefke, Christoph;
7:3:1:41     In-plane electronic confinement in superconducting LaAlO3/SrTiO3 nanostructures
DOI:10.1063/1.4768936  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Stornaiuolo, D.;Gariglio, S.;Couto, N. J. G.;Fete, A.;Caviglia, A. D.;Seyfarth, G.;Jaccard, D.;Morpurgo, A. F.;Triscone, J. -M.;
7:3:1:42     Fermi Surface and Superconductivity in Low-Density High-Mobility delta-Doped SrTiO3
DOI:10.1103/PhysRevLett.107.106801  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:19  AU: Kim, M.;Bell, C.;Kozuka, Y.;Kurita, M.;Hikita, Y.;Hwang, H. Y.;
7:3:1:43     Electronic structure of doped d(0) perovskite semiconductors
DOI:10.1103/PhysRevB.83.115114  JN:PHYSICAL REVIEW B  PY:2011
  TC:22  AU: Bistritzer, R.;Khalsa, G.;MacDonald, A. H.;
7:3:1:44     Quantum confinement in perovskite oxide heterostructures: Tight binding instead of a nearly free electron picture
DOI:10.1103/PhysRevB.88.125401  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Zhong, Zhicheng;Zhang, Qinfang;Held, Karsten;
7:3:1:45     Competition between Kondo screening and magnetism at the LaAlO3/SrTiO3 interface
DOI:10.1103/PhysRevB.90.125123  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ruhman, Jonathan;Joshua, Arjun;Ilani, Shahal;Altman, Ehud;
7:3:1:46     Intrinsic Instability of Electronic Interfaces with Strong Rashba Coupling
DOI:10.1103/PhysRevLett.109.196401  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:12  AU: Caprara, S.;Peronaci, F.;Grilli, M.;
7:3:1:47     Thermopower in oxide heterostructures: The importance of being multiple-band conductors
DOI:10.1103/PhysRevB.86.195301  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Filippetti, A.;Delugas, P.;Verstraete, M. J.;Pallecchi, I.;Gadaleta, A.;Marre, D.;Li, D. F.;Gariglio, S.;Fiorentini, V.;
7:3:1:48     Thickness-dependent carrier density at the surface of SrTiO3 (111) slabs
DOI:10.1103/PhysRevB.89.075303  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Sivadas, N.;Dixit, H.;Cooper, Valentino R.;Xiao, Di;
7:3:1:49     Tuning the Interface Conductivity of LaAlO3/SrTiO3 Using Ion Beams: Implications for Patterning
DOI:10.1021/nn4028135  JN:ACS NANO  PY:2013
  TC:9  AU: Mathew, Sinu;Annadi, Anil;Chan, Taw Kuei;Asmara, Teguh Citra;Zhan, Da;Wang, Xiao Renshaw;Azimi, Sara;Shen, Zexiang;Rusydi, Andrivo;Ariando;Breese, Mark B. H.;Venkatesan, T.;
7:3:1:50     Direct patterning of functional interfaces in oxide heterostructures
DOI:10.1063/1.3679379  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:16  AU: Banerjee, N.;Huijben, M.;Koster, G.;Rijnders, G.;
7:3:1:51     Upper Limit to Magnetism in LaAlO3/SrTiO3 Heterostructures
DOI:10.1103/PhysRevLett.107.217201  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:24  AU: Fitzsimmons, M. R.;Hengartner, N. W.;Singh, S.;Zhernenkov, M.;Bruno, F. Y.;Santamaria, J.;Brinkman, A.;Huijben, M.;Molegraaf, H. J. A.;de la Venta, J.;Schuller, Ivan K.;
7:3:1:52     Electronic Subband Reconfiguration in a d(0)-Perovskite Induced by Strain-Driven Structural Transformations
DOI:10.1103/PhysRevLett.109.226601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:2  AU: Laukhin, V.;Copie, O.;Rozenberg, M. J.;Weht, R.;Bouzehouane, K.;Reyren, N.;Jacquet, E.;Bibes, M.;Barthelemy, A.;Herranz, G.;
7:3:1:53     Localization of two-dimensional electron gas in LaAlO3/SrTiO3 heterostructures
DOI:10.1103/PhysRevB.85.161407  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Hernandez, T.;Bark, C. W.;Felker, D. A.;Eom, C. B.;Rzchowski, M. S.;
7:3:1:54     Emerging magnetism and electronic phase separation at titanate interfaces
DOI:10.1103/PhysRevB.88.201104  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Pavlenko, N.;Kopp, T.;Mannhart, J.;
7:3:1:55     Understanding the interactions between oxygen vacancies at SrTiO3 (001) surfaces
DOI:10.1103/PhysRevB.90.064106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Zhuang, Houlong L.;Ganesh, P.;Cooper, Valentino R.;Xu, Haixuan;Kent, P. R. C.;
7:3:1:56     Ferromagnetism in Itinerant Two-Dimensional t(2g) Systems
DOI:10.1103/PhysRevLett.110.206401  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:11  AU: Chen, Gang;Balents, Leon;
7:3:1:57     Persistent optically induced magnetism in oxygen-deficient strontium titanate
DOI:10.1038/NMAT3914  JN:NATURE MATERIALS  PY:2014
  TC:9  AU: Rice, W. D.;Ambwani, P.;Bombeck, M.;Thompson, J. D.;Haugstad, G.;Leighton, C.;Crooker, S. A.;
7:3:1:58     Magnetotransport effects in polar versus non-polar SrTiO3 based heterostructures
DOI:10.1103/PhysRevB.86.121104  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Flekser, E.;Ben Shalom, M.;Kim, M.;Bell, C.;Hikita, Y.;Hwang, H. Y.;Dagan, Y.;
7:3:1:59     Ab initio study of the two-dimensional metallic state at the surface of SrTiO3: Importance of oxygen vacancies
DOI:10.1103/PhysRevB.86.195119  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Shen, Juan;Lee, Hunpyo;Valenti, Roser;Jeschke, Harald O.;
7:3:1:60     Multiband superconductivity and nanoscale inhomogeneity at oxide interfaces
DOI:10.1103/PhysRevB.88.020504  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Caprara, S.;Biscaras, J.;Bergeal, N.;Bucheli, D.;Hurand, S.;Feuillet-Palma, C.;Rastogi, A.;Budhani, R. C.;Lesueur, J.;Grilli, M.;
7:3:1:61     Conducting channel at the LaAlO3/SrTiO3 interface
DOI:10.1103/PhysRevB.88.161107  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Huang, Z.;Wang, X. Renshaw;Liu, Z. Q.;Lu, W. M.;Zeng, S. W.;Annadi, A.;Tan, W. L.;Qiu, X. P.;Zhao, Y. L.;Salluzzo, M.;Coey, J. M. D.;Venkatesan, T.;Ariando;
7:3:1:62     Quantum oscillations from a two-dimensional electron gas at a Mott/band insulator interface
DOI:10.1063/1.4758989  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:12  AU: Moetakef, Pouya;Ouellette, Daniel G.;Williams, James R.;Allen, S. James;Balents, Leon;Goldhaber-Gordon, David;Stemmer, Susanne;
7:3:1:63     Transistor operation and mobility enhancement in top-gated LaAlO3/SrTiO3 heterostructures
DOI:10.1063/1.4820449  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Hosoda, Masayuki;Hikita, Yasuyuki;Hwang, Harold Y.;Bell, Christopher;
7:3:1:64     Nature of Weak Magnetism in SrTiO3/LaAlO3 Multilayers
DOI:10.1103/PhysRevLett.109.257207  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:15  AU: Salman, Z.;Ofer, O.;Radovic, M.;Hao, H.;Ben Shalom, M.;Chow, K. H.;Dagan, Y.;Hossain, M. D.;Levy, C. D. P.;MacFarlane, W. A.;Morris, G. M.;Patthey, L.;Pearson, M. R.;Saadaoui, H.;Schmitt, T.;Wang, D.;Kiefl, R. F.;
7:3:1:65     Emergent phenomena at oxide interfaces
DOI:10.1038/NMAT3223  JN:NATURE MATERIALS  PY:2012
  TC:468  AU: Hwang, H. Y.;Iwasa, Y.;Kawasaki, M.;Keimer, B.;Nagaosa, N.;Tokura, Y.;
7:3:1:66     Locally enhanced conductivity due to the tetragonal domain structure in LaAlO3/SrTiO3 heterointerfaces
DOI:10.1038/NMAT3753  JN:NATURE MATERIALS  PY:2013
  TC:24  AU: Kalisky, Beena;Spanton, Eric M.;Noad, Hilary;Kirtley, John R.;Nowack, Katja C.;Bell, Christopher;Sato, Hiroki K.;Hosoda, Masayuki;Xie, Yanwu;Hikita, Yasuyuki;Woltmann, Carsten;Pfanzelt, Georg;Jany, Rainer;Richter, Christoph;Hwang, Harold Y.;Mannhart, Jochen;Moler, Kathryn A.;
7:3:1:67     Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure
DOI:10.1103/PhysRevB.86.201105  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;Unusual temperature dependence of the spectral weight near the Fermi;level of NdNiO3 thin films;PHYSICAL REVIEW B;86;19;195147;10.1103/PhysRevB.86.195147;NOV 30 2012;2012;We investigate the behavior of the spectral weight near the Fermi level;of NdNiO3 thin films as a function of temperature across the;metal-to-insulator transition (MIT) by means of ultraviolet;photoelectron spectroscopy. The spectral weight was found to exhibit;thermal hysteresis, similar to that of the dc conductivity. A detailed;analysis of the temperature dependence reveals two distinct regimes of;spectral loss close to the Fermi level. The temperature evolution of one;regime is found to be independent of the MIT.;Garcia-Fernandez, Mirian/B-6018-2013; Zubko, Pavlo/B-5496-2009;Zubko, Pavlo/0000-0002-7330-3163;2;0;0;0;2;1098-0121;WOS:000311715000006;;;J;Sen, Arnab;Damle, Kedar;Moessner, R.;Vacancy-induced spin textures and their interactions in a classical spin;liquid;PHYSICAL REVIEW B;86;20;205134;10.1103/PhysRevB.86.205134;NOV 30 2012;2012;Motivated by experiments on the archetypal frustrated magnet;SrCr9pGa12-9pO19 (SCGO), we study the classical Heisenberg model on the;pyrochlore slab (kagome bilayer) lattice with site dilution x = 1 - p.;This allows us to address generic aspects of the physics of nonmagnetic;vacancies in a classical spin liquid. We explicitly demonstrate that the;pure (x = 0) system remains a spin liquid down to the lowest;temperatures, with an unusual nonmonotonic temperature dependence of the;susceptibility, which even turns diamagnetic for the apical spins;between the two kagome layers. For x > 0 but small, the low-temperature;magnetic response of the system is most naturally described in terms of;the properties of spatially extended spin textures that cloak an;"orphan" S = 3/2 Cr3+ spin in direct proximity to a pair of missing;sites belonging to the same triangular simplex. In the T -> 0 limit,;these orphan-texture complexes each carry a net magnetization that is;exactly half the magnetic moment of an individual spin of the undiluted;system. Furthermore, we demonstrate that they interact via an entropic;temperature-dependent pairwise exchange interaction J(eff) (T,(r) over;right arrow) similar to T J ((r) over right arrow root T) that has a;logarithmic form at short distances and decays exponentially beyond a;thermal correlation length xi(T) similar to 1/root T. The sign of J(eff);depends on whether the two orphan spins belong to the same kagome layer;or not. We provide a detailed analytical account of these properties;using an effective field theory approach specifically tailored for the;problem at hand. These results are in quantitative agreement with;large-scale Monte Carlo numerics.;3;1;0;0;3;1098-0121;WOS:000311715100008;;;J;Solanki, Ravindra Singh;Mishra, S. K.;Senyshyn, Anatoliy;Ishii, I.;Moriyoshi, Chikako;Suzuki, Takashi;Kuroiwa, Yoshihiro;Pandey, Dhananjai;Antiferrodistortive phase transition in pseudorhombohedral;(Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and;neutron powder diffraction study;PHYSICAL REVIEW B;86;17;174117;10.1103/PhysRevB.86.174117;NOV 30 2012;2012;The controversies about the structure of the true ground state of;pseudorhombohedral compositions of Pb(ZrxTi1-x)O-3 (PZT) are addressed;using a 6% Sr2+ substituted sample with x = 0.550. Sound velocity;measurements reveal a phase transition at T-c similar to 279 K. The;temperature dependence of full width at half maximum of (h00)(pc) peaks;and the unit cell volume also show anomalies around 279 K even though;there is no indication of any change of space group in the synchrotron;x-ray powder diffraction (SXRD) patterns. The neutron powder diffraction;patterns reveal appearance of superlattice peaks below T-c similar to;279 K, confirming the existence of an antiferrodistortive phase;transition. The Rietveld analysis of the room-temperature and;low-temperature SXRD data below T-c shows that the structure corresponds;to single monoclinic phase in the Cm space group while the analysis of;neutron powder diffraction data reveals that the structure of the;ground-state phase below T-c corresponds to the Cc space group. Our;analysis shows that the structural models for the ground-state phase;based on the R3c space group with or without the coexistence of the;room-temperature monoclinic phase in the Cm space group can be rejected.;SOLANKI, RAVINDRA /H-7221-2013; Senyshyn, Anatoliy/C-8267-2014;Senyshyn, Anatoliy/0000-0002-1473-8992;3;0;0;0;3;1098-0121;WOS:000311714600001;;;J;Steinke, N. -J.;Moore, T. A.;Mansell, R.;Bland, J. A. C.;Barnes, C. H. W.;Nonuniversal dynamic magnetization reversal in the Barkhausen-dominated;and mesofrequency regimes;PHYSICAL REVIEW B;86;18;184434;10.1103/PhysRevB.86.184434;NOV 30 2012;2012;Dynamic magnetization reversal in the mesofrequency range is studied by;ac magneto-optical Kerr effect (ac-MOKE) and ac anisotropic;magnetoresistance (ac-AMR) magnetometry in a series of epitaxial and;polycrystalline thin magnetic films. The dynamic coercive field was;found to scale as a power law with scaling exponents <= 1/2 depending on;the ferromagnetic material. In addition, there is a low sweep rate;regime in which the dynamic coercivity reaches a minimum. These findings;are explained in the context of reversal proceeding by motion of a few;domain walls (similar to 1). At dc and low field sweep rates the;reversal proceeds between local pinning sites via Barkhausen avalanches;and the overall reversal speed is strongly dependent on the field sweep;rate. At higher field sweep rates a continuous motion regime is entered;in which the reversal velocity depends linearly on the applied field;sweep rate and only an average pinning force is experienced by the wall.;The fit of the dynamic coercivity vs applied field sweep rate allows the;determination of the average nonlocal pinning field. The nonuniversal;scaling exponent can be explained using recently developed models and;introducing a field rate-dependent number of active domain walls.;Mansell, Rhodri/A-1450-2013;2;0;0;0;2;1098-0121;WOS:000311714700003;;;J;Stoffel, M.;Fagot-Revurat, Y.;Tejeda, A.;Kierren, B.;Nicolaou, A.;Le Fevre, P.;Bertran, F.;Taleb-Ibrahimi, A.;Malterre, D.;Electron-phonon coupling on strained Ge/Si(111)-(5x5) surfaces;PHYSICAL REVIEW B;86;19;195438;10.1103/PhysRevB.86.195438;NOV 30 2012;2012;We investigate the structural and electronic properties of strained;Ge/Si(111)-(5 x 5) surfaces by means of scanning tunneling microscopy;and high-resolution angle-resolved photoemission spectroscopy. The;homogeneous (5 x 5) reconstructed overlayers are characterized by three;electronic surface states, similar to the Si(111)-(7 x 7) surface. The;dispersion of the dangling bond related surface state exhibits the same;periodicity as that of the (5 x 5) reconstruction. Moreover, a careful;analysis of the shape and width of this surface state provides striking;evidence of electron-phonon coupling at low temperatures. By considering;the spectral function within a simple Debye model, we determine both the;Debye energy and the electron-phonon coupling strength. The latter value;is further confirmed by analyzing the temperature-dependent phonon;broadening of the dangling bond related surface state linewidth.;BERTRAN, Francois/B-7515-2008; Tejeda, Antonio/C-4711-2014;BERTRAN, Francois/0000-0002-2416-0514; Tejeda,;Antonio/0000-0003-0125-4603;1;0;0;0;1;1098-0121;WOS:000311715000012;;;J;Turek, I.;Kudrnovsky, J.;Carva, K.;Magnetic anisotropy energy of disordered tetragonal Fe-Co systems from;ab initio alloy theory;PHYSICAL REVIEW B;86;17;174430;10.1103/PhysRevB.86.174430;NOV 30 2012;2012;We present results of systematic fully relativistic first-principles;calculations of the uniaxial magnetic anisotropy energy (MAE) of a;disordered and partially ordered tetragonal Fe-Co alloy using the;coherent potential approximation (CPA). This alloy has recently become a;promising system for thin ferromagnetic films with a perpendicular;magnetic anisotropy. We find that existing theoretical approaches to;homogeneous random bulk Fe-Co alloys, based on a simple virtual crystal;approximation (VCA), overestimate the maximum MAE values obtained in the;CPA by a factor of 4. This pronounced difference is ascribed to the;strong disorder in the minority spin channel of real alloys, which is;neglected in the VCA and which leads to a broadening of the d-like;eigenstates at the Fermi energy and to the reduction of the MAE. The;ordered Fe-Co alloys with a maximum L1(0)-like atomic long-range order;can exhibit high values of the MAE, which, however, get dramatically;reduced by small perturbations of the perfect order.;Carva, Karel/A-3703-2008; Turek, Ilja/G-5553-2014; KUDRNOVSKY, Josef/G-5581-2014;KUDRNOVSKY, Josef/0000-0002-9968-6748;10;0;0;0;10;1098-0121;WOS:000311714600004;;;J;Uppstu, Andreas;Harju, Ari;High-field magnetoresistance revealing scattering mechanisms in graphene;PHYSICAL REVIEW B;86;20;201409;10.1103/PhysRevB.86.201409;NOV 30 2012;2012;We show that the type of charge carrier scattering significantly affects;the high-field magnetoresistance of graphene nanoribbons. This effect;has the potential to be used in identifying the scattering mechanisms in;graphene. The results also provide an explanation for the experimentally;found, intriguing differences in the behavior of the magnetoresistance;of graphene Hall bars placed on different substrates. Additionally, our;simulations indicate that the peaks in the longitudinal resistance tend;to become pinned to fractionally quantized values, as different;transport modes have very different scattering properties.;Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;1;0;0;0;1;1098-0121;WOS:000311715100004;;;J;White, Alexander J.;Sukharev, Maxim;Galperin, Michael;Molecular nanoplasmonics: Self-consistent electrodynamics in;current-carrying junctions;PHYSICAL REVIEW B;86;20;205324;10.1103/PhysRevB.86.205324;NOV 30 2012;2012;We consider a biased molecular junction subjected to an external;time-dependent electromagnetic field. We discuss local field formation;due to both surface plasmon-polariton excitations in the contacts and;the molecular response. Employing realistic parameters we demonstrate;that such self-consistent treatment is crucial for the proper;description of the junction transport characteristics.;White, Alexander/D-8754-2014;White, Alexander/0000-0002-7771-3899;3;0;0;0;3;1098-0121;WOS:000311715100010;;;J;Wierschem, Keola;Kato, Yasuyuki;Nishida, Yusuke;Batista, Cristian D.;Sengupta, Pinaki;Magnetic and nematic orderings in spin-1 antiferromagnets with;single-ion anisotropy;PHYSICAL REVIEW B;86;20;201108;10.1103/PhysRevB.86.201108;NOV 30 2012;2012;We study a spin-1 Heisenberg model with exchange interaction J, uniaxial;single-ion exchange anisotropy D, and Zeeman coupling to a magnetic;field B parallel to the symmetry axis. We compute the (D/J, B/J) quantum;phase diagram for square and simple cubic lattices by combining;analytical and quantum Monte Carlo approaches, and find a transition;between XY antiferromagnetic and ferronematic phases that spontaneously;break the U(1) symmetry of the model. In the language of bosonic gases,;this is a transition between a Bose-Einstein condensate (BEC) of single;bosons and a BEC of pairs. Our work opens up new avenues for measuring;this transition in real magnets.;8;0;0;0;8;1098-0121;WOS:000311715100001;;;J;Wu, Chien-Te;Valls, Oriol T.;Halterman, Klaus;Proximity effects in conical-ferromagnet/superconductor bilayers;PHYSICAL REVIEW B;86;18;184517;10.1103/PhysRevB.86.184517;NOV 30 2012;2012;We present a study of various aspects of proximity effects in F/S;(ferromagnet/superconductor) bilayers, where F has a spiral magnetic;texture such as that found in holmium, erbium, and other materials, and;S is a conventional s-wave superconductor. We numerically solve the;Bogoliubov-de Gennes (BdG) equations self-consistently and use the;solutions to compute physical quantities relevant to the proximity;effects in these bilayers. We obtain the relation between the;superconducting transition temperature T-c and the thicknesses d(F) of;the magnetic layer by solving the linearized BdG equations. We find that;the T-c (d(F)) curves include multiple oscillations. Moreover, the;system may be reentrant not only with d(F), as is the case when the;magnet is uniform, but also with temperature T : the superconductivity;disappears in certain ranges of d(F) or T. The T reentrance reported;here occurs when d(F) is larger than the spatial period of the conical;exchange field. We compute the condensation free energies and entropies;from the full BdG equations and find the results are in agreement with;T-c values obtained by linearization. The inhomogeneous nature of the;magnet makes it possible for all odd triplet pairing components to be;induced. We have investigated their properties and found that, as;compared to the singlet amplitude, both the m = 0 and +/- 1 triplet;components exhibit long-range penetration. For nanoscale bilayers, the;proximity lengths for both layers are also obtained. These lengths;oscillate with d(F) and they are found to be long range on both sides.;These results are shown to be consistent with recent experiments. We;also calculate the reverse proximity effect described by the;three-dimensional local magnetization, and the local density of states,;which reveals important energy-resolved signatures associated with the;proximity effects.;6;0;0;0;6;1098-0121;WOS:000311714700005;;;J;Altarelli, M.;Kurta, R. P.;Vartanyants, I. A.;X-ray cross-correlation analysis and local symmetries of disordered;systems: General theory (vol 82, 104207, 2010);PHYSICAL REVIEW B;86;17;179904;10.1103/PhysRevB.86.179904;NOV 29 2012;2012;1;0;0;0;1;1098-0121;WOS:000311693600006;;;J;Beheshtian, J.;Sadeghi, A.;Neek-Amal, M.;Michel, K. H.;Peeters, F. M.;Induced polarization and electronic properties of carbon-doped boron;nitride nanoribbons;PHYSICAL REVIEW B;86;19;195433;10.1103/PhysRevB.86.195433;NOV 29 2012;2012;The electronic properties of boron nitride nanoribbons (BNNRs) doped;with a line of carbon atoms are investigated using density functional;calculations. By replacing a line of alternating B and N atoms with;carbons, three different configurations are possible depending on the;type of the atoms which bond to the carbons. We found very different;electronic properties for these configurations: (i) the NCB arrangement;is strongly polarized with a large dipole moment having an unexpected;direction, (ii) the BCB and NCN arrangements are nonpolar with zero;dipole moment, (iii) the doping by a carbon line reduces the band gap;regardless of the local arrangement of the borons and the nitrogens;around the carbon line, and (iv) the polarization and energy gap of the;carbon-doped BNNRs can be tuned by an electric field applied parallel to;the carbon line. Similar effects were found when either an armchair or;zigzag line of carbon was introduced.;Sadeghi, Ali/D-1554-2013;8;0;0;0;8;1098-0121;WOS:000311694200006;;;J;Chi, Hang;Kim, Hyoungchul;Thomas, John C.;Su, Xianli;Stackhouse, Stephen;Kaviany, Massoud;Van der Ven, Anton;Tang, Xinfeng;Uher, Ctirad;Configuring pnicogen rings in skutterudites for low phonon conductivity;PHYSICAL REVIEW B;86;19;195209;10.1103/PhysRevB.86.195209;NOV 29 2012;2012;Dominant heat-carrying modes in skutterudites are associated with;vibrations of the pnicogen rings. Apart from filling the structural;cages with foreign species, disrupting the pnicogen ring structure by;substitutional alloying should be an effective approach to reduce;thermal conductivity. In this paper we explore alloying configurations;of pnicogen rings (Sb rings in the case of CoSb3) that yield;particularly low values of the thermal conductivity. We find that IV-VI;double substitution (replacing two Sb atoms with one atom each from the;column IV and column VI elements to achieve an average charge of two Sb;atoms) is a very effective approach. Our ab initio calculations, in;combination with a cluster expansion, have allowed us to identify stable;alloy configurations on the Sb rings. Subsequent molecular and lattice;dynamics simulations on low energy configurations establish the range of;atomic displacement parameters and values of the thermal conductivity.;Theoretical results are in good agreement with our experimental thermal;conductivity values. Combining both approaches of compensated double;substitution and filling of structural cages should be an effective way;of improving the thermoelectric figure of merit of skutterudites.;Su, Xianli/A-9685-2012; Chi, Hang/F-1537-2011; Thomas, John/A-2764-2009; Kim, Hyoungchul/F-2557-2014;Chi, Hang/0000-0002-1299-1150; Thomas, John/0000-0002-3162-0152; Kim,;Hyoungchul/0000-0003-3109-660X;8;0;0;0;8;1098-0121;WOS:000311694200003;;;J;Fortmann, C.;Niemann, C.;Glenzer, S. H.;Theory of x-ray scattering in high-pressure electrides;PHYSICAL REVIEW B;86;17;174116;10.1103/PhysRevB.86.174116;NOV 29 2012;2012;We report on a theoretical model for the calculation of x-ray scattering;from high-pressure electrides. By treating interstitial electrons as;effective anions forming a sublattice within the crystal, we explicitly;account for Bragg reflections from the sublattice as well as for;scattering interferences between the ion lattice and the anion;sublattice. The additional reflections and interferences lead to;significant modifications of the static structure factor as compared to;the pure lattices. Our results are important for accurate calculations;of material properties in the high-pressure phase and allow for direct;experimental verification of electride phases in matter at ultrahigh;pressures through angle-resolved x-ray scattering.;2;0;0;0;2;1098-0121;WOS:000311693600001;;;J;Guclu, Caner;Campione, Salvatore;Capolino, Filippo;Hyperbolic metamaterial as super absorber for scattered fields generated;at its surface;PHYSICAL REVIEW B;86;20;205130;10.1103/PhysRevB.86.205130;NOV 29 2012;2012;We show that hyperbolic metamaterials (HMs) that exhibit hyperbolic;wave-vector dispersion diagrams possess two important features related;to super absorption: The total power scattered by a nanosphere is (i);greatly enhanced when placed at the HM surface, compared to other;material surfaces, and (ii) almost totally directed into the HM. We show;that these two features are peculiar of HM interfaces, and we support;them using a spectral theory study of transverse-electric and magnetic;waves scattered by a subwavelength nanosphere. We analyze the;nanosphere's scattered power absorbed by various substrate;configurations. We also consider various nanosphere materials.;22;0;0;0;22;1098-0121;WOS:000311694300002;;;J;Hebbache, M.;Entanglement of electron spins and geometric phases in the diamond color;center coupled to the P1 center;PHYSICAL REVIEW B;86;19;195316;10.1103/PhysRevB.86.195316;NOV 29 2012;2012;Impurity spins in semiconductors are potential quantum bits.;Entanglement and topological phases are key resources in quantum;computation. We prove that the coupled electron spins carried by a;diamond nitrogen-vacancy color center (NV-) and a single substitutional;nitrogen impurity (P1 center) are entangled in the immediate vicinity of;the level anticrossing that appears in the Zeeman energy diagram at;about 500 G. We also determine the Aharonov-Anandan, Berry, and marginal;geometric phases that can be accumulated by the state vectors of this;spin system when it is magnetically transported around a closed path. At;the resonance where the gap between two energy levels is minimum, the;geometric phases undergo discontinuities, and the entanglement of the;two electron spins is maximal.;2;0;0;0;2;1098-0121;WOS:000311694200004;;;J;Kerdsongpanya, Sit;Alling, Bjorn;Eklund, Per;Effect of point defects on the electronic density of states of ScN;studied by first-principles calculations and implications for;thermoelectric properties;PHYSICAL REVIEW B;86;19;195140;10.1103/PhysRevB.86.195140;NOV 29 2012;2012;We have investigated the effect of defects and impurities on the;electronic density of states of scandium nitride using first-principles;calculations with the generalized gradient approximation and hybrid;functionals for the exchange correlation energy. Our results show that;Sc and N vacancies can introduce asymmetric peaks in the density of;states close to the Fermi level. We also find that the N vacancy states;are sensitive to total electron concentration of the system due to their;possibility for spin polarization. Substitutional point defects shift;the Fermi level in the electronic band according to their valence but do;not introduce sharp features. The energetics and electronic structure of;defect pairs are also studied. By using hybrid functional calculations,;a correct description of the band gap of scandium nitride is obtained.;Our results envisage ways for improving the thermoelectric figure of;merit of ScN by electronic structure engineering through stoichiometry;tuning and doping.;Eklund, Per/B-7677-2011; Alling, Bjorn/I-3193-2012;Eklund, Per/0000-0003-1785-0864; Alling, Bjorn/0000-0001-5863-5605;8;0;0;0;8;1098-0121;WOS:000311694200001;;;J;Kim, Jiseok;Fischetti, Massimo V.;Aboud, Shela;Structural, electronic, and transport properties of silicane nanoribbons;PHYSICAL REVIEW B;86;20;205323;10.1103/PhysRevB.86.205323;NOV 29 2012;2012;Silicane ribbons do not suffer from aromatic dependence of the band gap;making them a more promising candidate for near-term nanoelectronic;application compared to armchair graphene nanoribbons. The structural,;electronic, and transport properties of free-standing sp(3)-hybridized;armchair- and zigzag-edge silicane nanoribbons have been investigated;using ab initio and nonlocal empirical pseudopotential calculations.;Under ambient conditions, two-dimensional silicane sheets will;spontaneously break into stable one-dimensional ribbons similar to;density functional theory studies of graphene ribbons. The calculated;low-field electron mobility and ballistic conductance show a strong edge;dependence, due to differences in the effective mass and momentum;relaxation rates along the two transport directions. The mobility in;zigzag-edge ribbons is found to be approximately twenty times higher;than in armchair-edge ribbons.;7;0;0;0;7;1098-0121;WOS:000311694300004;;;J;Kim, Kyou-Hyun;Payne, David A.;Zuo, Jian-Min;Symmetry of piezoelectric (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (x=0.31);single crystal at different length scales in the morphotropic phase;boundary region;PHYSICAL REVIEW B;86;18;184113;10.1103/PhysRevB.86.184113;NOV 29 2012;2012;We use probes of three different length scales to examine symmetry of (1;- x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) single crystals in the;morphotropic phase boundary (MPB) region at composition x = 0.31;(PMN-31% PT). On the macroscopic scale, x-ray diffraction (XRD) shows a;mixture of strong and weak diffraction peaks of different widths. The;closest match to XRD peak data is made with monoclinic Pm (M-C);symmetry. On the local scale of a few nanometers, convergent beam;electron diffraction (CBED) studies, with a 1.6-nm electron probe,;reveal no obvious symmetry. These CBED experimental patterns can be;approximately matched with simulations based on monoclinic symmetry,;which suggests locally distorted monoclinic structure. A monoclinic Cm;(M-A or M-B)-like symmetry could also be obtained from certain regions;of the crystal by using a larger electron probe size of several tens of;nanometers in diameter. Thus the monoclinic symmetry of single crystal;PMN-31% PT is developed only in parts of the crystal by averaging over;locally distorted structure on the scale of few tens of nanometers. The;macroscopic symmetry observed by XRD is a result of averaging from the;local structure in PMN-31% PT single crystal. The lack of local symmetry;at a few nanometers scale suggests that the polarization switching;results from a change in local displacements, which are not restricted;to specific symmetry planes or directions.;2;0;0;0;2;1098-0121;WOS:000311693900002;;;J;Kossacki, P.;Faugeras, C.;Kuehne, M.;Orlita, M.;Mahmood, A.;Dujardin, E.;Nair, R. R.;Geim, A. K.;Potemski, M.;Circular dichroism of magnetophonon resonance in doped graphene;PHYSICAL REVIEW B;86;20;205431;10.1103/PhysRevB.86.205431;NOV 29 2012;2012;The polarization-resolved Raman-scattering response due to E-2g phonons;in monolayer graphene has been investigated in magnetic fields up to 29;T. The hybridization of the E-2g phonon is only observed with the;fundamental inter-Landau-level excitation (involving the n = 0 Landau;level) and in just one of the two configurations of the circularly;cross-polarized excitation and scattered light. This polarization;anisotropy of the magnetophonon resonance is shown to be inherent to;relatively strongly doped graphene samples with carrier concentrations;typical for graphene deposited on Si/SiO2 substrates.;Dujardin, Erik/A-2748-2010; Raveendran Nair, Rahul/G-5839-2010; Orlita, Milan/H-1130-2014;Dujardin, Erik/0000-0001-7242-9250;;3;0;0;0;3;1098-0121;WOS:000311694300005;;;J;Kostylev, M.;Stashkevich, A. A.;Roussigne, Y.;Grigoryeva, N. A.;Mistonov, A. A.;Menzel, D.;Sapoletova, N. A.;Napolskii, K. S.;Eliseev, A. A.;Lukashin, A. V.;Grigoriev, S. V.;Samarin, S. N.;Microwave properties of Ni-based ferromagnetic inverse opals;PHYSICAL REVIEW B;86;18;184431;10.1103/PhysRevB.86.184431;NOV 29 2012;2012;Investigations of microwave properties of Ni-based inverse ferromagnetic;opal-like film with the [111] axis of the fcc structure along the normal;direction to the film have been carried out in the 2-18 GHz frequency;band. We observed multiple spin wave resonances for the magnetic field;applied perpendicular to the film, i.e., along the [111] axis of this;artificial crystal. For the field applied in the film plane, a broad;band of microwave absorption is observed, which does not contain a fine;structure. The field ranges of the responses observed are quite;different for these two magnetization directions. This suggests a;collective magnetic ground state or shape anisotropy and collective;microwave dynamics for this foam-like material. This result is in;agreement with SQUID measurements of hysteresis loops for the material.;Two different models for this collective behavior are suggested that;satisfactorily explain the major experimental results.;Lukashin, Alexey/F-6746-2013; Mistonov, Alexander/H-2098-2013; Grigoryeva, Natalia/K-2253-2013; Kostylev, Mikhail/H-5214-2014;Mistonov, Alexander/0000-0003-0138-3579; Grigoryeva,;Natalia/0000-0002-9910-6192;;1;0;0;0;1;1098-0121;WOS:000311693900004;;;J;Kvashnin, Y. O.;Khmelevskyi, S.;Kudrnovsky, J.;Yaresko, A. N.;Genovese, L.;Bruno, P.;Noncollinear magnetic ordering in compressed FePd3 ordered alloy: A;first principles study;PHYSICAL REVIEW B;86;17;174429;10.1103/PhysRevB.86.174429;NOV 29 2012;2012;By means of ab initio calculations based on the density functional;theory we investigated the magnetic phase diagram of ordered FePd3 alloy;as a function of external pressure. Considering several magnetic;configurations we concluded that the system under pressure has a;tendency toward noncollinear spin alignment. Analysis of the Heisenberg;exchange parameters J(ij) revealed strong dependence of iron-iron;magnetic couplings on polarization of Pd atoms. To take into account;that effect we built an extended Heisenberg model with higher order;(biquadratic) terms. Minimizing the energy of this Hamiltonian, fully;parametrized using the results of ab initio calculations, we found a;candidate for a ground state of compressed FePd3, which can be seen as;two interpenetrating "triple-Q" phases.;Genovese, Luigi/C-5937-2011; Bruno, Patrick/C-9159-2009; KUDRNOVSKY, Josef/G-5581-2014;Genovese, Luigi/0000-0003-1747-0247; Bruno, Patrick/0000-0002-2574-1943;;KUDRNOVSKY, Josef/0000-0002-9968-6748;1;0;0;0;1;1098-0121;WOS:000311693600004;;;J;Li, Wu;Lindsay, L.;Broido, D. A.;Stewart, Derek A.;Mingo, Natalio;Thermal conductivity of bulk and nanowire Mg2SixSn1-x alloys from first;principles;PHYSICAL REVIEW B;86;17;174307;10.1103/PhysRevB.86.174307;NOV 29 2012;2012;The lattice thermal conductivity (kappa) of the thermoelectric;materials, Mg2Si, Mg2Sn, and their alloys, are calculated for bulk and;nanowires, without adjustable parameters. We find good agreement with;bulk experimental results. For large nanowire diameters, size effects;are stronger for the alloy than for the pure compounds. For example, in;200 nm diameter nanowires kappa is lower than its bulk value by 30%,;20%, and 20% for Mg2Si0.6Sn0.4, Mg2Si, and Mg2Sn, respectively. For;nanowires less than 20 nm thick, the relative decrease surpasses 50%,;and it becomes larger in the pure compounds than in the alloy. At room;temperature, kappa of Mg2SixSn1-x is less sensitive to nanostructuring;size effects than SixGe1-x, but more sensitive than PbTexSe1-x. This;suggests that further improvement of Mg2SixSn1-x as a nontoxic;thermoelectric may be possible.;Lindsay, Lucas/C-9221-2012; Stewart, Derek/B-6115-2008;25;1;0;0;25;1098-0121;WOS:000311693600002;;;J;Niklasson, Anders M. N.;Cawkwell, Marc J.;Fast method for quantum mechanical molecular dynamics;PHYSICAL REVIEW B;86;17;174308;10.1103/PhysRevB.86.174308;NOV 29 2012;2012;As the processing power available for scientific computing grows,;first-principles Born-Oppenheimer molecular dynamics simulations are;becoming increasingly popular for the study of a wide range of problems;in materials science, chemistry, and biology. Nevertheless, the;computational cost of Born-Oppenheimer molecular dynamics still remains;prohibitively large for many potential applications. Here we show how to;avoid a major computational bottleneck: the self-consistent-field;optimization prior to force calculations. The optimization-free quantum;mechanical molecular dynamics method gives trajectories that are almost;indistinguishable from an "exact" microcanonical Born-Oppenheimer;molecular dynamics simulation even when low-prefactor linear scaling;sparse matrix algebra is used. Our findings show that the computational;gap between classical and quantum mechanical molecular dynamics;simulations can be significantly reduced.;4;0;0;0;4;1098-0121;WOS:000311693600003;;;J;Ong, Zhun-Yong;Fischetti, Massimo V.;Theory of interfacial plasmon-phonon scattering in supported graphene;(vol 86, 165422, 2012);PHYSICAL REVIEW B;86;19;199904;10.1103/PhysRevB.86.199904;NOV 29 2012;2012;Ong, Zhun-Yong/B-9486-2013;Ong, Zhun-Yong/0000-0003-2668-6453;6;0;0;0;6;1098-0121;WOS:000311694200007;;;J;Per, Manolo C.;Snook, Ian K.;Russo, Salvy P.;Efficient calculation of unbiased expectation values in diffusion;quantum Monte Carlo;PHYSICAL REVIEW B;86;20;201107;10.1103/PhysRevB.86.201107;NOV 29 2012;2012;Despite the proven utility of quantum Monte Carlo methods in addressing;the quantum many-body problem, many important observables are difficult;to calculate due to the presence of large, and sometimes divergent,;statistical errors. The present state of the art allows the construction;of renormalized estimators which result in finite variances, but which;invariably include some systematic bias. We present a simple method for;calculating unbiased expectation values of local operators in the;diffusion quantum Monte Carlo method which is applicable to both bare;and renormalized estimators, allowing the accurate calculation of;important properties such as forces.;snook, ian/A-3427-2009; Per, Manolo/C-3680-2011;1;0;0;0;1;1098-0121;WOS:000311694300001;;;J;Simonson, J. W.;Smith, G. J.;Post, K.;Pezzoli, M.;Kistner-Morris, J. J.;McNally, D. E.;Hassinger, J. E.;Nelson, C. S.;Kotliar, G.;Basov, D. N.;Aronson, M. C.;Magnetic and structural phase diagram of CaMn2Sb2;PHYSICAL REVIEW B;86;18;184430;10.1103/PhysRevB.86.184430;NOV 29 2012;2012;On the basis of magnetic, transport, and optical measurements performed;on single crystals, we report CaMn2Sb2 to be an antiferromagnetic;insulator that exhibits weak ferromagnetic order above the Neel;temperature. Magnetic susceptibility measurements reveal the magnitude;of the high-temperature Curie-Weiss moment to be only half as large as;the ground-state ordered moment, while electronic-structure calculations;based on crystallographic measurements suggest a crystal-field-induced;spin-state transition does not occur. The antiferromagnetic state is;relatively insensitive to both doping and modest pressures, while the;ferromagnetism can be readily tuned by either. Infrared transmission and;pressure-dependent resistivity measurements suggest proximity to an;electronic delocalization transition. We suggest the ferromagnetic state;may be the signature of magnetic polarons.;1;1;0;0;1;1098-0121;WOS:000311693900003;;;J;Stishov, Sergei M.;Petrova, Alla E.;Sidorov, Vladimir A.;Menzel, Dirk;Self-doping effects in cobalt silicide CoSi: Electrical, magnetic,;elastic, and thermodynamic properties (vol 86, 064433, 2012);PHYSICAL REVIEW B;86;17;179903;10.1103/PhysRevB.86.179903;NOV 29 2012;2012;0;0;0;0;0;1098-0121;WOS:000311693600005;;;J;Thede, M.;Xiao, F.;Baines, Ch.;Landee, C.;Morenzoni, E.;Zheludev, A.;Ordering in weakly coupled random singlet spin chains;PHYSICAL REVIEW B;86;18;180407;10.1103/PhysRevB.86.180407;NOV 29 2012;2012;The influence of bond randomness on long-range magnetic ordering in the;weakly coupled S = 1/2 antiferromagnetic spin chain materials;Cu(py)(2)(Cl1-xBrx)(2) is studied by muon spin rotation and bulk;measurements. Disorder is found to have a strong effect on the ordering;temperature T-N, and an even stronger one on the saturation;magnetization m(0), but considerably more so in the effectively;lower-dimensional Br-rich materials. The observed behavior is attributed;to random singlet ground states of individual spin chains, but remains;in contradiction with chain mean-field theory [Joshi and Yang, Phys.;Rev. B 67, 174403 (2003)] predictions. In this context, we discuss the;possibility of a universal distribution of ordered moments in the weakly;coupled random singlet chains model.;Thede, Matthias/L-2975-2013;4;0;0;0;4;1098-0121;WOS:000311693900001;;;J;Usov, V.;Stoyanov, S.;Coileain, C. O.;Toktarbaiuly, O.;Shvets, I. V.;Antiband instability on vicinal Si(111) under the condition of;diffusion-limited sublimation;PHYSICAL REVIEW B;86;19;195317;10.1103/PhysRevB.86.195317;NOV 29 2012;2012;In this paper, we investigate the antiband instability on vicinal;Si(111) surfaces with different angles of misorientation. It is known;that prolonged direct current-annealing of Si(111) results in the;formation of antibands; i.e., the step bunches with the opposite slope;to the primary bunches. We provide a theoretical description of antiband;formation via the evolution of the atomic steps' shape. We also derive a;criterion for the onset of the antiband instability under the conditions;of sublimation controlled by slow adatom surface diffusion. We examine;this criterion experimentally by studying the initial stage of the;antiband formation at a constant temperature of 1270 degrees C while;systematically varying the applied electromigration field. The;experiment strongly supports the validity of the derived theoretical;criterion and indicates the importance of accounting for the factor of;critical field in the theoretical modeling of step bunching or antiband;instabilities. Deduced from the comparison of theory and experiment, the;Si surface atoms' effective charge cannot exceed double the elementary;charge, set by the lower limit of kinetic characteristic length d(s) =;0.3 nm. Using d(s) = 1.7 - 4.5 nm draws values of the effective charge;in line with the values reported in earlier studies.;Shvets, Igor/J-8710-2013;0;0;0;0;0;1098-0121;WOS:000311694200005;;;J;Weber, Cedric;Mila, Frederic;Anticollinear magnetic order induced by impurities in the frustrated;Heisenberg model of pnictides;PHYSICAL REVIEW B;86;18;184432;10.1103/PhysRevB.86.184432;NOV 29 2012;2012;We present Monte Carlo simulations for a classical antiferromagnetic;Heisenberg model with both nearest (J(1)) and next-nearest (J(2));exchange couplings on the square lattice in the presence of nonmagnetic;impurities. We show that the order-by-disorder entropy selection,;associated with the Ising-like phase transition that appears for;J(2)/J(1) > 1/2 in the pure spin model, is quenched at low temperature;due to the presence of nonmagnetic impurities. Evidence that a new;competing order is stabilized around the impurities and in turn induces;a reentrance phase transition is reported. Implications for local;magnetic measurement of the parent compound of iron pnictides are;briefly discussed.;Weber, Cedric/D-5027-2014;Weber, Cedric/0000-0002-6989-2700;4;0;0;0;4;1098-0121;WOS:000311693900005;;;J;Weston, L.;Cui, X. Y.;Delley, B.;Stampfl, C.;Band offsets and polarization effects in wurtzite ZnO/Mg0.25Zn0.75O;superlattices from first principles;PHYSICAL REVIEW B;86;20;205322;10.1103/PhysRevB.86.205322;NOV 29 2012;2012;Using first-principles calculations, we investigate the band offsets,;built-in electric fields, and band gaps of (0001)-oriented wurtzite;ZnO/Mg0.25Zn0.75O superlattices, including the dependence on;superlattice geometry and strain. Significant built-in electric fields;form inside the quantum-well region that are found to be tunable over;the range 0.24 MV/cm <= E-w <= 0.63 MV/cm, and potentially up to 1MV/cm;by varying the relative width of the well and barrier regions. The;valence band offset at the ZnO/Mg0.25Zn0.75O interface is calculated to;be 0.25-0.26 eV which, in contrast to the "common anion rule," is a;significant portion of the total band offset, and this is in support of;recent experiment. Calculated values for the valence band offset were;found to be insensitive to variations in superlattice geometry and;strain. The band gap of the superlattice is determined by the competing;effects of quantum confinement and the quantum-confined Stark effect,;with the former being more dominant for the systems investigated. These;findings will be useful in the design and optimization of ZnO/MgxZn1-xO;superlattices for electronics and optoelectronics applications.;Delley, Bernard/E-1336-2014;Delley, Bernard/0000-0002-7020-2869;3;0;1;0;4;1098-0121;WOS:000311694300003;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;PHYSICAL REVIEW B;86;19;195141;10.1103/PhysRevB.86.195141;NOV 29 2012;2012;We perform realistic first-principles calculations of iron chalcogenides;and ruthenate-based materials to identify experimental signatures of;Hund's-coupling-induced correlations in these systems. We find that FeTe;and KxFe2-yAs2 display unusual orbital-dependent fractional power-law;behavior in their quasiparticle self-energy and optical conductivity, a;phenomenon first identified in SrRuO3. Strong incoherence in the;paramagnetic state of these materials results in electronic states;hidden to angle-resolved photoemission spectroscopy which reemerge at;low temperatures. We identify the effective low-energy Hamiltonian;describing these systems and show that these anomalies are not;controlled by the proximity to a quantum critical point but result from;coexistence of fast quantum mechanical orbital fluctuations and slow;spin fluctuations.;Yin, Zhiping/G-3949-2012;Yin, Zhiping/0000-0001-8679-5251;10;0;0;0;10;1098-0121;WOS:000311694200002;;;J;Kumar, A.;Fennie, C. J.;Rabe, K. M.;Spin-lattice coupling and phonon dispersion of CdCr2O4 from first;principles;PHYSICAL REVIEW B;86;18;184429;10.1103/PhysRevB.86.184429;NOV 28 2012;2012;First-principles calculations are used to investigate the effects of;magnetic ordering on the minimum-energy structure and on the full phonon;dispersion relation of CdCr2O4, focusing on the changes through the;coupled magnetic/structural transition which shows relief of the;geometric frustration of the antiferromagnetic ordering on the;pyrochlore lattice. We computed the full phonon dispersion relations for;the ferromagnetic and antiferromagnetic orderings in cubic and;tetragonal structures of CdCr2O4. We extracted the phonon dispersion for;the cubic paramagnetic phase and found that it compares wellwith the;experimental results. The AFM ordering is seen to lower the symmetry and;induce a lattice distortion comparable in magnitude to that observed in;the transition. While the spin-phonon couplings are large for modes;which involve displacement of the Cr atoms, there are no unstable modes;at any point in the Brillouin zone for either of the magnetic orderings;considered, and thus we conclude that the phase transition is driven not;by spin-phonon coupling, but by the atomic forces and stresses induced;by the magnetic order. Finally, by comparison of the phonon frequencies;for structures with different magnetic orderings and structural;distortions, we find that the spin-phonon coupling, rather than the;coupling of the phonons to the structural change, is the dominant factor;in the observed changes of phonon frequencies through the phase;transition.;Kumar, Anil/A-9834-2013;Kumar, Anil/0000-0002-4901-8987;1;0;0;0;1;1098-0121;WOS:000311604700002;;;J;Lin, Shi-Zeng;Bulaevskii, Lev N.;Batista, Cristian D.;Vortex dynamics in ferromagnetic superconductors: Vortex clusters,;domain walls, and enhanced viscosity;PHYSICAL REVIEW B;86;18;180506;10.1103/PhysRevB.86.180506;NOV 28 2012;2012;We demonstrate that there is a long-range vortex-vortex attraction in;ferromagnetic superconductors due to polarization of the magnetic;moments. Vortex clusters are then stabilized in the ground state for low;vortex densities. The motion of vortex clusters driven by the Lorentz;force excites magnons. This regime becomes unstable at a threshold;velocity above which domain walls are generated for slow relaxation of;the magnetic moments and the vortex configuration becomes modulated.;This dynamics of vortices and magnetic moments can be probed by;transport measurements.;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;6;0;0;0;6;1098-0121;WOS:000311604700001;;;J;Wong, Chris L. M.;Law, K. T.;Majorana Kramers doublets in dx2-y2-wave superconductors with Rashba;spin-orbit coupling;PHYSICAL REVIEW B;86;18;184516;10.1103/PhysRevB.86.184516;NOV 28 2012;2012;In this work, we show that a quasi-one-dimensional d(x2-y2)-wave;superconductor with Rashba spin-orbit coupling is a DIII class,;time-reversal invariant, topological superconductor (TS), which supports;a Majorana Kramers Doublet (MKD) at each end of the TS. A MKD is a pair;of Majorana end states (MESs) protected by time-reversal symmetry (TRS).;An external magnetic field breaks TRS and drives the system from DIII to;D class in which case a single MES appears at each end of the TS. We;show that a MKD induces resonant Andreev reflection with zero-bias;conductance peak of 4e(2)/h. Experimental realizations of the proposed;model are discussed.;Law, Kam/H-1410-2011;19;1;0;0;19;1098-0121;WOS:000311604700003;;;J;De Luca, M.;Pettinari, G.;Ciatto, G.;Amidani, L.;Filippone, F.;Polimeni, A.;Fonda, E.;Boscherini, F.;Bonapasta, A. Amore;Giubertoni, D.;Knuebel, A.;Lebedev, V.;Capizzi, M.;Identification of four-hydrogen complexes in In-rich InxGa1-xN (x > 0.4);alloys using photoluminescence, x-ray absorption, and density functional;theory;PHYSICAL REVIEW B;86;20;201202;10.1103/PhysRevB.86.201202;NOV 28 2012;2012;Postgrowth hydrogen incorporation in In-rich InxGa1-xN (x > 0.4) alloys;strongly modifies the optical and structural properties of the material:;A large blueshift of the emission and absorption energies is accompanied;by a remarkable broadening of the interatomic-distance distribution, as;probed by synchrotron radiation techniques. Both effects vanish at a;finite In-concentration value (x similar to 0.5). Synergic x-ray;absorption measurements and first-principle calculations unveil two;different defective species forming upon hydrogenation: one due to the;high chemical reactivity of H, the other ascribed to mere lattice;damage. In the former species, four H atoms bind to as many N atoms, all;nearest-neighbors of a same In atom. The stability of this peculiar;complex, which is predicted to behave as a donor, stems from atomic;displacements cooperating to reduce local strain.;Fonda, Emiliano/D-9666-2011; Filippone, Francesco/I-4718-2012; Pettinari, Giorgio/M-8678-2014;Filippone, Francesco/0000-0001-5862-1115; Pettinari,;Giorgio/0000-0003-0187-3770;1;0;0;0;1;1098-0121;WOS:000311605000001;;;J;Grytsyuk, Sergiy;Peskov, Maxim V.;Schwingenschloegl, Udo;First-principles modeling of interfaces between solids with large;lattice mismatch: The prototypical CoO(111)/Ni(111) interface;PHYSICAL REVIEW B;86;17;174115;10.1103/PhysRevB.86.174115;NOV 28 2012;2012;In this work we investigate the CoO(111)/Ni(111) interface by;first-principles calculations, focusing on its structure and stability.;To satisfy the approximate 5:6 ratio of the CoO and Ni lattice;constants, we construct a supercell with 5 x 5 Co (O) and 6 x 6 Ni atoms;per layer in the bulk regions. For the interface Ni layer and the;adjacent Ni layer we consider different configurations and study the;binding energy. We show for an ideal CoO interface terminated by 5 x 5 O;atoms that the structure is more stable if there are 5 x 5 Ni atoms next;to it instead of 6 x 6 as in the bulk. In addition, we observe that a;transition layer with 31 or 33 Ni atoms located between the interface 5;x 5 Ni and bulk 6 x 6 Ni layers (which partially reflects the structures;of both these layers) enhances the stability of the CoO/Ni interface.;The electronic and magnetic modifications induced by the interface;formation are discussed.;3;0;0;0;3;1098-0121;WOS:000311604400001;;;J;Luekermann, D.;Sologub, S.;Pfnuer, H.;Klein, C.;Horn-von Hoegen, M.;Tegenkamp, C.;Scattering at magnetic and nonmagnetic impurities on surfaces with;strong spin-orbit coupling;PHYSICAL REVIEW B;86;19;195432;10.1103/PhysRevB.86.195432;NOV 28 2012;2012;Adsorption-induced reduction of surface-state conductivity in epitaxial;Bi(111) films, a prototype system with large Rashba-induced;surface-state splitting, by adsorbed atoms of Bi, Fe, and Co has been;investigated by macroscopic surface magnetotransport measurements at a;temperature of 10 K. A detailed analysis of magnetotransport, dc;transport, and Hall data reveals that the scattering efficiencies for Co;and Fe are larger by a factor of 2 than that for Bi. While for the;latter charge transfer and change of band filling near the Fermi level;are negligible, we find an increase of hole concentration upon Co and Fe;adsorption. These atoms act as acceptors and immobilize on average about;0.5 electrons per adsorbed atom. Besides the dominant classical;magnetoconductance signal the films show signatures of weak;antilocalization, reflecting the strong spin-orbit coupling in Bi(111);surface states. This behavior can be changed to weak localization by the;adsorption of high concentrations (0.1 monolayers) of magnetic;impurities (Fe, Co), similarly to results found on the topological;insulator Bi2Se3. Our results demonstrate that details of chemical bond;formation for impurities are crucial for local spin moments and;electronic scattering properties.;5;0;0;0;5;1098-0121;WOS:000311604900001;;;J;Molina-Sanchez, A.;Garcia-Cristobal, A.;Bester, G.;Semiempirical pseudopotential approach for nitride-based nanostructures;and ab initio based passivation of free surfaces;PHYSICAL REVIEW B;86;20;205430;10.1103/PhysRevB.86.205430;NOV 28 2012;2012;We present a semiempirical pseudopotential method based on screened;atomic pseudopotentials and derived from ab initio calculations. This;approach is motivated by the demand for pseudopotentials able to address;nanostructures, where ab initio methods are both too costly and;insufficiently accurate at the level of the local density approximation,;while mesoscopic effective-mass approaches are inapplicable due to the;small size of the structures along, at least, one dimension. In this;work, we improve the traditional pseudopotential method by a two-step;process: First, we invert a set of self-consistently determined screened;ab initio potentials in wurtzite GaN for a range of unit-cell volumes,;thus determining spherically symmetric and structurally averaged atomic;potentials. Second, we adjust the potentials to reproduce observed;excitation energies. We find that the adjustment represents a reasonably;small perturbation over the potential, so that the ensuing potential;still reproduces the original wave functions, while the excitation;energies are significantly improved. We furthermore deal with the;passivation of the dangling bonds of free surfaces which is relevant for;the study of nanowires and colloidal nanoparticles. We present a;methodology to derive passivant pseudopotentials from ab initio;calculations. We apply our pseudopotential approach to the exploration;of the confinement effects on the electronic structure of GaN nanowires.;Bester, Gabriel/I-4414-2012;Bester, Gabriel/0000-0003-2304-0817;1;0;0;0;1;1098-0121;WOS:000311605000005;;;J;Patel, Aavishkar A.;Dutta, Amit;Sudden quenching in the Kitaev honeycomb model: Study of defect and heat;generation;PHYSICAL REVIEW B;86;17;174306;10.1103/PhysRevB.86.174306;NOV 28 2012;2012;We study the behavior of the defect and heat densities under sudden;quenching near the quantum critical points in the two-dimensional Kitaev;honeycomb model both in the thermodynamic and nonthermodynamic limits.;We consider quenches starting from a quantum critical point into the;gapped as well as the gapless phases. We choose points on the lines of;anisotropic quantum critical points as well as different points of;intersection of these lines as the initial points from where the;quenching starts. We find that the defect and heat densities display the;expected power-law scalings along with logarithmic corrections to;scaling (or cusp singularities) in certain cases. In the vicinity of;some of the intersection points, the scaling behaviors change,;indicating an effective dimensional reduction; the scaling behavior near;these points depends on the number of critical lines crossed in the;process of quenching. All the analytical predictions are also verified;by numerical integration.;1;0;0;0;1;1098-0121;WOS:000311604400002;;;J;Raith, Martin;Stano, Peter;Fabian, Jaroslav;Theory of spin relaxation in two-electron laterally coupled Si/SiGe;quantum dots;PHYSICAL REVIEW B;86;20;205321;10.1103/PhysRevB.86.205321;NOV 28 2012;2012;Highly accurate numerical results of phonon-induced two-electron spin;relaxation in silicon double quantum dots are presented. The relaxation,;enabled by spin-orbit coupling and the nuclei of Si-29 (natural or;purified abundance), is investigated for experimentally relevant;parameters, the interdot coupling, the magnetic field magnitude and;orientation, and the detuning. We calculate relaxation rates for zero;and finite temperatures (100 mK), concluding that our findings for zero;temperature remain qualitatively valid also for 100 mK. We confirm the;same anisotropic switch of the axis of prolonged spin lifetime with;varying detuning as recently predicted in GaAs. Conditions for possibly;hyperfine-dominated relaxation are much more stringent in Si than in;GaAs. For experimentally relevant regimes, the spin-orbit coupling,;although weak, is the dominant contribution, yielding anisotropic;relaxation rates of at least two orders of magnitude lower than in GaAs.;Raith, Martin/A-3357-2011; Stano, Peter/C-3016-2013; Fabian, Jaroslav/K-1700-2013;Fabian, Jaroslav/0000-0002-3009-4525;6;0;0;0;6;1098-0121;WOS:000311605000004;;;J;Romhanyi, Judit;Penc, Karlo;Multiboson spin-wave theory for Ba2CoGe2O7: A spin-3/2 easy-plane Neel;antiferromagnet with strong single-ion anisotropy;PHYSICAL REVIEW B;86;17;174428;10.1103/PhysRevB.86.174428;NOV 28 2012;2012;We consider the square-lattice antiferromagnetic Heisenberg Hamiltonian;extended with a single-ion axial anisotropy term as a minimal model for;the multiferroic Ba2CoGe2O7. Developing a multiboson spin-wave theory,;we investigate the dispersion of the spin excitations in this spin-3/2;system. As a consequence of a strong single-ion anisotropy, a stretching;(longitudinal) spin mode appears in the spectrum. The inelastic neutron;scattering spectra of Zheludev et al. [Phys. Rev. B 68, 024428 (2003)];are successfully reproduced by the low energy modes in the multiboson;spin-wave theory, and we anticipate the appearance of the spin;stretching modes at approximate to 4 meV that can be identified using;the calculated dynamical spin structure factors. We expect the;appearance of spin stretching modes for any S > 1/2 compound where the;single-ion anisotropy is significant.;Penc, Karlo/A-3092-2011;Penc, Karlo/0000-0002-2197-1370;5;1;0;0;5;1098-0121;WOS:000311604400004;;;J;Sarmadian, N.;Saniz, R.;Lamoen, D.;Partoens, B.;Influence of Al concentration on the optoelectronic properties of;Al-doped MgO;PHYSICAL REVIEW B;86;20;205129;10.1103/PhysRevB.86.205129;NOV 28 2012;2012;We use density functional theory within the local density approximation;to investigate the structural, electronic, and optical properties of;Al-doped MgO. The concentrations considered range from 6% to 56%. In the;latter case, we also compare the optical properties of the amorphous and;crystalline phases. We find that, overall, the electronic properties of;the crystalline phases change qualitatively little with Al;concentration. On the other hand, the changes in the electronic;structure in the amorphous phase are more important, most notably;because of deep impurity levels in the band gap that are absent in the;crystalline phase. This leads to observable effects in, e.g., the;optical absorption edge and in the refractive index. Thus, the latter;can be used to characterize the crystalline to amorphous transition with;Al doping level.;0;0;0;0;0;1098-0121;WOS:000311605000003;;;J;Smadici, S.;Nelson-Cheeseman, B. B.;Bhattacharya, A.;Abbamonte, P.;Interface ferromagnetism in a SrMnO3/LaMnO3 superlattice;PHYSICAL REVIEW B;86;17;174427;10.1103/PhysRevB.86.174427;NOV 28 2012;2012;Resonant soft x-ray absorption measurements at the O K edge on a;SrMnO3/LaMnO3 superlattice show a shoulder at the energy of doped holes,;which corresponds to the main peak of resonant scattering from the;modulation in the doped hole density. Scattering line shape at the Mn;L-3,L-2 edges has a strong variation below the ferromagnetic transition;temperature. This variation has a period equal to half the superlattice;superperiod and follows the development of the ferromagnetic moment,;pointing to a ferromagnetic phase developing at the interfaces. It;occurs at the resonant energies for Mn3+ and Mn4+ valences. A model for;these observations is presented, which includes a double-exchange;two-site orbital and the variation with temperature of the hopping;frequency t(ij) between the two sites.;Bhattacharya, Anand/G-1645-2011;Bhattacharya, Anand/0000-0002-6839-6860;1;0;0;0;1;1098-0121;WOS:000311604400003;;;J;Zanotto, Simone;Degl'Innocenti, Riccardo;Xu, Ji-Hua;Sorba, Lucia;Tredicucci, Alessandro;Biasiol, Giorgio;Ultrafast optical bleaching of intersubband cavity polaritons;PHYSICAL REVIEW B;86;20;201302;10.1103/PhysRevB.86.201302;NOV 28 2012;2012;We report on the transition from the strong to the weak light-matter;coupling regime between an intersubband excitation and a photonic;crystal resonance in a nanostructured semiconductor membrane. Such a;transition is induced by varying the intensity of an ultrafast light;pulse, which is employed for pumping and probing the system eigenmodes.;The phenomenon is interpreted in terms of the saturation of the;intersubband transition due to the large number of photoexcited;electrons in the quantum well, as confirmed by a thorough analysis;performed both in frequency and time domain.;Biasiol, Giorgio/C-5465-2009;Biasiol, Giorgio/0000-0001-7974-5459;5;0;0;0;5;1098-0121;WOS:000311605000002;;;J;Ciric, L.;Sienkiewicz, A.;Gaal, R.;Jacimovic, J.;Vaju, C.;Magrez, A.;Forro, L.;Defects and localization in chemically-derived graphene;PHYSICAL REVIEW B;86;19;195139;10.1103/PhysRevB.86.195139;NOV 27 2012;2012;We have performed electron spin resonance (ESR) measurements on a large;assembly of graphene oxide (GO) and reduced graphene oxide (RGO) flakes.;In GO samples the Curie tail is coming from 1.4 x 10(18) cm(-3) of;localized spins. Although reduction of GO was expected to reestablish;the pristine properties of graphene, no Pauli-like contribution was;detected and only a low concentration of 1.2 x 10(16) cm(-3) spin;carrying defects were measured. Our study, completed by resistivity;measurements, shows that the carrier transport in RGO samples is;dominated by hopping. The incomplete reduction of GO leaves behind a;large number of defects, presumably the majority of which are ESR;silent, causing the Anderson localization of the electronic states.;Slight doping with potassium indicates the appearance of a Pauli;contribution in the spin susceptibility.;Jacimovic, Jacim/C-2674-2013;2;0;0;0;2;1098-0121;WOS:000311537100001;;;J;Dietz, O.;Stoeckmann, H. -J.;Kuhl, U.;Izrailev, F. M.;Makarov, N. M.;Doppler, J.;Libisch, F.;Rotter, S.;Surface scattering and band gaps in rough waveguides and nanowires;PHYSICAL REVIEW B;86;20;201106;10.1103/PhysRevB.86.201106;NOV 27 2012;2012;The boundaries of waveguides and nanowires have drastic influence on;their coherent scattering properties. Designing the boundary profile is;thus a promising approach for transmission and band-gap engineering with;many applications. By performing an experimental study of microwave;transmission through rough waveguides we demonstrate that a recently;proposed surface scattering theory can be employed to predict the;measured transmission properties from the boundary profiles and vice;versa. A new key ingredient of this theory is a scattering mechanism;which depends on the squared gradient of the surface profiles. We;demonstrate the nontrivial effects of this scattering mechanism by;detailed mode-resolved microwave measurements and numerical simulations.;Dietz, Otto/E-9025-2011;4;0;0;0;4;1098-0121;WOS:000311537400001;;;J;Duong, Duc T.;Toney, Michael F.;Salleo, Alberto;Role of confinement and aggregation in charge transport in;semicrystalline polythiophene thin films;PHYSICAL REVIEW B;86;20;205205;10.1103/PhysRevB.86.205205;NOV 27 2012;2012;Crystallite orientations, molecular packing disorder, and hole mobility;of poly(3-hexylthiophene) thin films that are spin casted from different;solvents are studied as a function of film thickness. Grazing incidence;x-ray diffraction reveals that films consist of an ultrathin layer of;ordered, edge-on oriented aggregates and a more disordered, face-on;oriented bulk region. Diffraction and optical absorption spectroscopy;elucidate the film-forming process. Field-effect hole mobility provides;evidence for interconnecting aggregates as the mechanism for efficient;charge transport.;12;1;0;0;12;1098-0121;WOS:000311537400002;;;J;Farrell, David E.;Wolverton, C.;Structure and diffusion in liquid complex hydrides via ab initio;molecular dynamics;PHYSICAL REVIEW B;86;17;174203;10.1103/PhysRevB.86.174203;NOV 27 2012;2012;We have used density functional theory based ab initio molecular;dynamics (AIMD) to study NaAlH4, LiBH4, LiNH2, and Li2BNH6 across a;range of temperatures, above and below the experimental melting;temperature. We have elucidated the structure, vibrational, and;diffusion characteristics of these four materials. We find: (i) In all;cases, the liquid state remains a mixture of the ions found in the solid;state. (ii) The anions remain intact on average but undergo large;deformations across the range of temperatures. (iii) In the case of;LiNH2, there is evidence that the Li+ sublattice melts before the;anionic sublattice. (iv) We find a connection between increased;anion-anion ordering and reduced anion mobility even above the;experimental melting point, due to long range Coulombic interactions;between anions. (v) Finally, we find the liquid has the same major;vibrational modes as the solid, though the lower frequency vibration and;rotation modes become more prominent with increasing temperature.;Wolverton, Christopher/B-7542-2009;1;0;0;0;1;1098-0121;WOS:000311536400001;;;J;Gebhardt, Julian;Vines, Francesc;Goerling, Andreas;Influence of the surface dipole layer and Pauli repulsion on band;energies and doping in graphene adsorbed on metal surfaces;PHYSICAL REVIEW B;86;19;195431;10.1103/PhysRevB.86.195431;NOV 27 2012;2012;The synthesis of single-layer graphene sheets on metal surfaces can be;carried out routinely nowadays. The energetic alignment of the graphene;band structure, including the position of the Dirac point relative to;the Fermi level of the metal, and subsequently, the doping level of the;graphene sheet, depends crucially on the graphene-metal distance and the;specific metal considered. These dependencies are studied with;density-functional theory considering as typical metal surfaces Au(111),;Ni(111), and Au/Ni(111). In the latter case, a single layer of gold is;intercalated between the Ni(111) surface and the graphene sheet. We show;that the energetic positions of eigenstates of helium adsorbed on a;Au(111) surface exhibit a behavior with the adsorption distance;qualitatively comparable to that of bands of physisorbed graphene. In;both cases, the distance dependence of the energy of adsorbate bands can;be explained by the effect of the surface dipole layer on the adsorbate;bands and by electrostatic interactions caused by small charge;rearrangements due to Pauli repulsion between metal surface and;graphene. These charge rearrangements are neither caused by a charge;transfer nor by chemical interactions due to conventional orbital;interaction but have the effect to reduce the overlap of the surface;charge density of the metal with the charge density of the adsorbate.;The latter effect is known as pillow effect from molecules adsorbed on;metal surfaces. Charge transfer between graphene and the metal substrate;does occur but has an opposite effect to the surface dipole layer and;Pauli repulsion, i.e., reduces the effect of the latter. For very large;adsorption distances, this charge transfer vanishes in such a way that;the Dirac point of graphene aligns with the metal Fermi energy. It is;shown that the amount and character of graphene doping can be controlled;by tuning the graphene-metal distance. For a proper description of the;involved electrostatic potentials, a finite-slab correction had to be;applied to them in order to take into account the finite size of the;metal slabs used to model the substrate.;10;0;0;0;10;1098-0121;WOS:000311537100002;;;J;Han, Jae-Ho;Lee, Hyun-Woo;Interlayer exchange coupling between next nearest neighbor layers;PHYSICAL REVIEW B;86;17;174426;10.1103/PhysRevB.86.174426;NOV 27 2012;2012;Interlayer exchange coupling (IEC) between next nearest neighbor;magnetic layers is investigated. For a multilayer system that contains;threemagnetic layers (with magnetization directionsm (m)over-cap(1),;(m)(m)over-cap(2), and (m)(m)over-cap(3), respectively) separated by two;nonmagnetic layers, the angle dependence of the coupling energy and the;thickness dependence of coupling constants were obtained. In addition to;the well known nearest neighbor IEC of the form;-(J)over-tilde(12)(m)over-cap(1) center dot (m)over-cap(2) and;-(J)over-tilde(23)(m)over-cap(2) center dot (m)over-cap(3), we find the;next nearest neighbor IEC of the form -(J);over-tilde(123)((m)over-cap(1) center dot (m)over-cap(2))((m)over-cap(2);center dot (m)over-cap(3)), which is different from the Heisenberg type;next nearest neighbor coupling -J(13)(m)over-cap(1) center dot;(m)over-cap(3). The strength of the next nearest neighbor IEC oscillates;with respect to the thickness of both magnetic and nonmagnetic layers.;The strength of the next nearest neighbor IEC is generally smaller than;the conventional nearest neighbor IEC, but is large enough to allow for;experimental detection.;Lee, Hyun-Woo/B-8995-2008;Lee, Hyun-Woo/0000-0002-1648-8093;1;0;0;0;1;1098-0121;WOS:000311536400003;;;J;Lazo, Cesar;Neel, Nicolas;Kroeger, Joerg;Berndt, Richard;Heinze, Stefan;Tunneling magnetoresistance and exchange interaction in single-atom;contacts;PHYSICAL REVIEW B;86;18;180406;10.1103/PhysRevB.86.180406;NOV 27 2012;2012;The tunneling magnetoresistance of single-atom junctions is shown to;depend on the electrode separation owing to exchange forces and the;resulting geometric relaxations. An analytical model is proposed to;extract relaxations from the magnetoresistances measured with a scanning;tunneling microscope. Exchange forces and relaxations calculated within;density functional theory demonstrate the validity of the model for a;range of distances between tip and sample which extends from tunneling;close to the point of maximal attraction.;3;0;0;0;3;1098-0121;WOS:000311536700001;;;J;Luo, Xin;Sullivan, Michael B.;Quek, Su Ying;First-principles investigations of the atomic, electronic, and;thermoelectric properties of equilibrium and strained Bi2Se3 and Bi2Te3;including van der Waals interactions;PHYSICAL REVIEW B;86;18;184111;10.1103/PhysRevB.86.184111;NOV 27 2012;2012;Bi2Se3 and Bi2Te3 are layered compounds of technological importance,;being excellent thermoelectric materials as well as topological;insulators. We report density functional theory calculations of the;atomic, electronic, and thermoelectric properties of strained bulk and;thin-film Bi2Se3 and Bi2Te3, focusing on an appropriate description of;van der Waals (vdW) interactions. The calculations show that the van der;Waals density functional (vdW-DF) with Cooper's exchange (vdW-DFxC09);can reproduce closely the experimental interlayer distances in;unstrained Bi2Se3 and Bi2Te3. Interestingly, we predict atomic;structures that are in much better agreement with the experimentally;determined structure from Nakajima than that obtained from Wyckoff,;especially for Bi2Se3, where the difference in atomic structures;qualitatively changes the electronic band structure. The band structure;obtained using the Nakajima structure and the vdW-DFxC09 optimized;structure are in much better agreement with previous reports of;photoemission measurements, than that obtained using the Wyckoff;structure. Using vdW-DFxC09 to fully optimize atomic structures of bulk;and thin-film Bi2Se3 and Bi2Te3 under different in-plane and uniaxial;strains, we predict that the electronic bandgap of both the bulk;materials and thin films decreases with tensile in-plane strain and;increases with compressive in-plane strain. We also predict, using the;semiclassical Boltzmann approach, that the magnitude of the n-type;Seebeck coefficient of Bi2Te3 can be increased by the compressive;in-plane strain while that of Bi2Se3 can be increased with tensile;in-plane strain. Further, the in-plane power factor of n-doped Bi2Se3;can be increased with compressive uniaxial strain while that of n-doped;Bi2Te3 can be increased by compressive in-plane strain. Strain;engineering thus provides a direct method to control the electronic and;thermoelectric properties in these thermoelectric topological insulator;materials.;Quek, Su Ying/I-2934-2014;11;0;0;0;11;1098-0121;WOS:000311536700003;;;J;Olejnik, E.;Pandit, B.;Basel, T.;Lafalce, E.;Sheng, C-X.;Zhang, C.;Jiang, X.;Vardeny, Z. V.;Ultrafast optical studies of ordered poly(3-thienylene-vinylene) films;(vol 85, 235201, 2012);PHYSICAL REVIEW B;86;19;199903;10.1103/PhysRevB.86.199903;NOV 27 2012;2012;0;0;0;0;0;1098-0121;WOS:000311537100003;;;J;Qin, Zhen-Xing;Zhang, Chao;Tang, Ling-Yun;Zhong, Guo-Hua;Lin, Hai-Qing;Chen, Xiao-Jia;High-pressure phases of a hydrogen-rich compound: Tetramethylgermane;PHYSICAL REVIEW B;86;18;184110;10.1103/PhysRevB.86.184110;NOV 27 2012;2012;The vibrational and structural properties of a hydrogen-rich group IVa;hydride, Ge(CH3)(4), are studied by combining Raman spectroscopy and;synchrotron x-ray diffraction measurements at room temperature and at;pressures up to 30.2 GPa. Both techniques allow the obtaining of;complementary information on the high-pressure behaviors and yield;consistent phase transitions at 1.4 GPa for the liquid to solid and 3.0,;5.4, and 20.3 GPa for the solid to solid. The four high-pressure solid;phases are identified to have the cubic, orthorhombic, monoclinic, and;monoclinic crystal structures with space groups of Pa-3 for phase I,;Pnma for phase II, P2(1)/c for phase III, and P2(1) for phase IV,;respectively. These transitions are suggested to result from the changes;in the inter- and intramolecular bonding of this compound. The softening;of some Raman modes on CH3 groups and their sudden disappearance;indicate that Ge(CH3)(4) might be an ideal compound to realize;metallization and even high-temperature superconductivity at modest;static pressure for laboratory capability.;Zhong, Guohua/A-8811-2011; Zhang, Chao/E-5109-2010;Zhong, Guohua/0000-0003-0673-8738; Zhang, Chao/0000-0002-5957-2287;3;0;0;0;3;1098-0121;WOS:000311536700002;;;J;Wdowik, U. D.;Koza, M. M.;Chatterji, T.;Phonons in lanthanum manganite: Inelastic neutron scattering and density;functional theory studies;PHYSICAL REVIEW B;86;17;174305;10.1103/PhysRevB.86.174305;NOV 27 2012;2012;Dynamical properties of the lanthanum manganite lattice are examined by;inelastic neutron scattering experiments and density functional theory;calculations. Densities of vibrational states are measured close to the;Jahn-Teller transition temperature of 750 K. Substantial changes;observed in the phonon spectra above the phase transformation are due to;residual orthorhombic distortions that persist in the high-temperature;structure of lanthanum manganite. Results of the present theoretical;investigations supply additional information useful for both Raman and;infrared spectroscopies. In addition, they indicate that typical static;phonon calculations are insufficient to reproduce accurately;experimental magnitudes of these vibrational quantities of lanthanum;manganite that are determined to a large extent by dynamical effects.;0;0;0;0;0;1098-0121;WOS:000311536400002;;;J;Yan, Wei;Wubs, Martijn;Mortensen, N. Asger;Hyperbolic metamaterials: Nonlocal response regularizes broadband;supersingularity;PHYSICAL REVIEW B;86;20;205429;10.1103/PhysRevB.86.205429;NOV 27 2012;2012;We study metamaterials known as hyperbolic media that in the usual;local-response approximation exhibit hyperbolic dispersion and an;associated broadband singularity in the density of states. Instead, from;the more microscopic hydrodynamic Drude theory we derive qualitatively;different optical properties of these metamaterials, due to the;free-electron nonlocal optical response of their metal constituents. We;demonstrate that nonlocal response gives rise to a large-wavevector;cutoff in the dispersion that is inversely proportional to the Fermi;velocity of the electron gas, but also for small wavevectors we find;differences for the hyperbolic dispersion. Moreover, the size of the;unit cell influences effective parameters of the metamaterial even in;the deep subwavelength regime. Finally, instead of the broadband;supersingularity in the local density of states, we predict a large but;finite maximal enhancement proportional to the inverse cube of the Fermi;velocity.;Mortensen, Niels Asger/C-3592-2008; Wubs, Martijn/B-4934-2008;Mortensen, Niels Asger/0000-0001-7936-6264; Wubs,;Martijn/0000-0002-8286-7825;28;3;0;0;28;1098-0121;WOS:000311537400003;;;J;Yoneda, Y.;Kitanaka, Y.;Noguchi, Y.;Miyayama, M.;Electronic and local structures of Mn-doped BiFeO3 crystals;PHYSICAL REVIEW B;86;18;184112;10.1103/PhysRevB.86.184112;NOV 27 2012;2012;The electronic structure of complex oxides is important for;understanding their functional properties. Here, we report the results;of investigating multiferroic BiFeO3 using various x-ray spectroscopy;techniques. Zn- and Mn-codoped and Mn-doped BiFeO3 samples were prepared;with the aim of improving ferroelectric properties of BiFeO3. The;valences of the doped Mn and host Fe were investigated. When oxygen;vacancies exist in the sample, Mn acts as a hole acceptor. Furthermore,;Mn and Fe stabilize the perovskite unit by changing their ionic radius.;As a result, Mn and Fe atoms exhibit various valence states in the;BiFeO3 system. Evidence of the electronic structure for Fe 3d-O 2p-Bi 6s;hybridization is also presented.;2;0;0;0;2;1098-0121;WOS:000311536700004;;;J;Despoja, V.;Mowbray, D. J.;Vlahovic, D.;Marusic, L.;TDDFT study of time-dependent and static screening in graphene;PHYSICAL REVIEW B;86;19;195429;10.1103/PhysRevB.86.195429;NOV 26 2012;2012;Time-dependent density functional theory (TDDFT) within the random phase;approximation (RPA) is used to obtain the time evolution of the induced;potential produce by the sudden formation of a C 1s core hole inside a;graphene monolayer, and to show how the system reaches the equilibrium;potential. The characteristic oscillations in the time-dependent;screening potential are related to the excitations of pi and sigma + pi;plasmons as well as the low energy 2D plasmons in doped graphene. The;equilibrium RPA screened potential is compared with the DFT effective;potential, yielding good qualitative agreement. The self energy of a;point charge near a graphene monolayer is shown to demonstrate an image;potential type behavior, Ze/(z - z(0)), down to very short distances (4;a.u.) above the graphene layer. Both results are found to agree near;quantitatively with the DFT ground state energy shift of a Li+ ion;placed near a graphene monolayer.;Mowbray, Duncan/A-5531-2010; CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Mowbray, Duncan/0000-0002-8520-0364;;4;0;0;0;4;1098-0121;WOS:000311544500013;;;J;Anspoks, A.;Kalinko, A.;Kalendarev, R.;Kuzmin, A.;Atomic structure relaxation in nanocrystalline NiO studied by EXAFS;spectroscopy: Role of nickel vacancies;PHYSICAL REVIEW B;86;17;174114;10.1103/PhysRevB.86.174114;NOV 26 2012;2012;Nanocrystalline NiO samples have been studied using the Ni K-edge;extended x-ray absorption fine structure (EXAFS) spectroscopy and;recently developed modeling technique, combining classical molecular;dynamics with ab initio multiple-scattering EXAFS calculations;(MD-EXAFS). Conventional analysis of the EXAFS signals from the first;two coordination shells of nickel revealed that (i) the second shell;average distance R(Ni-Ni-2) expands in nanocrystalline NiO compared to;microcrystalline NiO, in agreement with overall unit cell volume;expansion observed by x-ray diffraction; (ii) on the contrary, the first;shell average distance R(Ni-O-1) in nanocrystalline NiO shrinks compared;to microcrystalline NiO; (iii) the thermal contribution into the;mean-square relative displacement sigma(2) is close in both;microcrystalline and nanocrystalline NiO and can be described by the;Debye model; (iv) the static disorder is additionally present in;nanocrystalline NiO in both the first Ni-O-1 and second Ni-Ni-2 shells;due to nanocrystal structure relaxation. Within the MD-EXAFS method, the;force-field potential models have been developed for nanosized NiO using;as a criterion the agreement between the experimental and theoretical;EXAFS spectra. The best solutions have been obtained for the 3D;cubic-shaped nanoparticle models with nonzero Ni vacancy concentration;C-vac: C-vac approximate to 0.4-1.2% for NiO nanoparticles having the;cube size of L approximate to 3.6-4.2 nm and C-vac approximate to;1.6-2.0% for NiO thin film composed of cubic nanograins with a size of L;approximate to 1.3-2.1 nm. Thus our results show that the Ni vacancies;in nanosized NiO play important role in its atomic structure relaxation;along with the size reduction effect.;Kuzmin, Alexei/A-2400-2010; Anspoks, Andris/E-8602-2010; Kalinko, Aleksandr/A-3421-2010;Kuzmin, Alexei/0000-0003-4641-6354; Anspoks, Andris/0000-0002-5162-4521;;;8;0;0;0;8;1098-0121;WOS:000311543200002;;;J;Dahlhaus, J. P.;Gibertini, M.;Beenakker, C. W. J.;Scattering theory of topological invariants in nodal superconductors;PHYSICAL REVIEW B;86;17;174520;10.1103/PhysRevB.86.174520;NOV 26 2012;2012;Time-reversal invariant superconductors having nodes of vanishing;excitation gap support zero-energy boundary states with topological;protection. Existing expressions for the topological invariant are given;in terms of the Hamiltonian of an infinite system. We give an;alternative formulation in terms of the Andreev reflection matrix of a;normal-metal-superconductor interface. This allows us to relate the;topological invariant to the angle-resolved Andreev conductance also;when the boundary state in the superconductor has merged with the;continuum of states in the normal metal. A variety of symmetry classes;is obtained, depending on additional unitary symmetries of the;reflection matrix. We derive conditions for the quantization of the;conductance in each symmetry class and test these on a model for a;two-or three-dimensional superconductor with spin-singlet and;spin-triplet pairing, mixed by Rashba spin-orbit interaction.;Beenakker, Carlo/B-7424-2008;Beenakker, Carlo/0000-0003-4748-4412;8;0;0;0;8;1098-0121;WOS:000311543200007;;;J;Ehlers, D.;Tsurkan, V.;von Nidda, H. -A. Krug;Loidl, A.;Intrinsic anomalous magnetic anisotropy of CdCr2S4;PHYSICAL REVIEW B;86;17;174423;10.1103/PhysRevB.86.174423;NOV 26 2012;2012;The magnetocrystalline anisotropy of the ferromagnetic spinel CdCr2S4;was investigated by ferromagnetic resonance measurements. By avoiding;any contact to iron during the sample preparation we can exclude that;the anisotropy is due to ferrous impurities, and by performing;wavelength dispersive electron probe microanalysis as well as annealing;experiments, it is demonstrated that the samples possess almost ideal;stoichiometry. The resonance data suggest that compositional deviations;from the stoichiometry up to 10(-3) have no influence on our conclusion;that the magnetocrystalline anisotropy is an intrinsic property of;CdCr2S4, caused by trigonal distortion of the sulfur octahedra;surrounding the Cr3+ ions. Anomalous low-temperature linewidth maxima in;the < 111 > directions can be understood by considering the crystal;fields acting on inequivalent sites of the magnetic ions in the spinel;structure and by taking into account the effect of exchange narrowing.;5;0;0;0;5;1098-0121;WOS:000311543200004;;;J;Nemec, M.;Foltin, G. R.;Schmidt, K. P.;Microscopic mechanism for the 1/8 magnetization plateau in SrCu2(BO3)(2);PHYSICAL REVIEW B;86;17;174425;10.1103/PhysRevB.86.174425;NOV 26 2012;2012;The frustrated quantum magnet SrCu2(BO3)(2) shows a remarkably rich;phase diagram in an external magnetic field including a sequence of;magnetization plateaux. The by far experimentally most studied and most;prominent magnetization plateau is the 1/8 plateau. Theoretically, one;expects that this material is well described by the Shastry-Sutherland;model. But, recent microscopic calculations indicate that the 1/8;plateau is energetically not favored. Here, we report on a very simple;microscopic mechanism which naturally leads to a 1/8 plateau for;realistic values of the magnetic exchange constants. We show that the;1/8 plateau with a square unit cell benefits most compared to other;plateau structures from quantum fluctuations which, to a large part, are;induced by Dzyaloshinskii-Moriya interactions. Physically, such;couplings result in kinetic terms in an effective hard-core-boson;description leading to a renormalization of the energy of the different;plateau structures which we treat in this work on the mean-field level.;The stability of the resulting plateaux are discussed. Furthermore, our;results indicate a series of stripe structures above 1/8 and a stable;magnetization plateau at 1/6. Most qualitative aspects of our;microscopic theory agree well with a recently formulated;phenomenological theory for the experimental data of SrCu2(BO3)(2).;Interestingly, our calculations point to a rather large ratio of the;magnetic couplings in the Shastry-Sutherland model such that;nonperturbative effects become essential for the understanding of the;frustrated quantum magnet SrCu2(BO3)(2).;Schmidt, Kai /C-7286-2009;5;0;0;0;5;1098-0121;WOS:000311543200006;;;J;Niedziela, Jennifer L.;McGuire, M. A.;Egami, T.;Local structural variation as source of magnetic moment reduction in;BaFe2As2;PHYSICAL REVIEW B;86;17;174113;10.1103/PhysRevB.86.174113;NOV 26 2012;2012;We report time-of-flight neutron powder diffraction results on;stoichiometric BaFe2As2. Pair distribution function analysis shows that;the orthorhombic distortion in the a-b plane at short distances are;significantly different from the average lattice distortion, indicating;local variations in the lattice at short range. We propose that this;local variation reflects a high density of nanotwins, short-ranged;structures which locally affect the magnetic alignment. This result;suggests that the discrepancies between the observed and calculated;magnetic moments in BaFe2As2 arise partly from short-ranged variation of;the lattice in the a-b plane.;McGuire, Michael/B-5453-2009;McGuire, Michael/0000-0003-1762-9406;2;0;0;0;2;1098-0121;WOS:000311543200001;;;J;Ross, K. A.;Proffen, Th.;Dabkowska, H. A.;Quilliam, J. A.;Yaraskavitch, L. R.;Kycia, J. B.;Gaulin, B. D.;Lightly stuffed pyrochlore structure of single-crystalline Yb2Ti2O7;grown by the optical floating zone technique;PHYSICAL REVIEW B;86;17;174424;10.1103/PhysRevB.86.174424;NOV 26 2012;2012;Recent neutron scattering and specific heat studies on the pyrochlore;Yb2Ti2O7 have revealed variations in its magnetic behavior below 265 mK.;In the best samples, a sharp anomaly in the specific heat is observed at;T = 265 mK. Other samples, especially single crystals, have broad;features in the specific heat which vary in sharpness and temperature;depending on the sample, indicating that the magnetic ground statemay be;qualitatively different in such samples. We performed detailed;comparisons of the chemical structure of a pulverized single crystal of;Yb2Ti2O7, grown by the floating zone technique, to a sintered powder;sample of Yb2Ti2O7. Rietveld refinements of neutron powder diffraction;data on these samples reveal that the crushed single crystal is best;described as a "stuffed" pyrochlore, Yb-2(Ti2-xYbx)O7-x/2 with x =;0.046(4), despite perfectly stoichiometric starting material.;Substituting magnetic Yb3+ on the nonmagnetic Ti4+ sublattice would;introduce random exchange bonds and local lattice deformations. These;are expected to be the mechanism leading to the variation of the;delicate magnetic ground state of Yb2Ti2O7. Determination of the cubic;cell length a could be useful as a method for characterizing the;stoichiometry of nonpulverized single crystals at room temperature.;Proffen, Thomas/B-3585-2009; Lujan Center, LANL/G-4896-2012;Proffen, Thomas/0000-0002-1408-6031;;29;2;0;0;29;1098-0121;WOS:000311543200005;;;J;Sims, H.;Butler, W. H.;Richter, M.;Koepernik, K.;Sasioglu, E.;Friedrich, C.;Bluegel, S.;Theoretical investigation into the possibility of very large moments in;Fe16N2;PHYSICAL REVIEW B;86;17;174422;10.1103/PhysRevB.86.174422;NOV 26 2012;2012;We examine the mystery of the disputed high-magnetization alpha;''-Fe16N2 phase, employing the Heyd-Scuseria-Ernzerhof screened hybrid;functional method, perturbative many-body corrections through the GW;approximation, and on-site Coulomb correlations through the generalized;gradient approximation (GGA) + U method. We present a first-principles;computation of the effective on-site Coulomb interaction (Hubbard U);between localized 3d electrons employing the constrained random-phase;approximation (cRPA), finding only somewhat stronger on-site;correlations than in bcc Fe. We find that the hybrid functional method,;the GW approximation, and the GGA + U method (using parameters computed;from cRPA) yield an average spin moment of 2.9 mu(B), 2.6-2.7 mu(B), and;2.7 mu(B) per Fe, respectively.;Sasioglu, Ersoy/H-8697-2013; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Sasioglu, Ersoy/0000-0002-1701-528X; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;0;0;0;7;1098-0121;WOS:000311543200003;;;J;Asahara, Akifumi;Nakajima, Makoto;Fukaya, Ryo;Tokoro, Hiroko;Ohkoshi, Shin-ichi;Suemoto, Tohru;Ultrafast dynamics of reversible photoinduced phase transitions in;rubidium manganese hexacyanoferrate investigated by midinfrared CN;vibration spectroscopy;PHYSICAL REVIEW B;86;19;195138;10.1103/PhysRevB.86.195138;NOV 26 2012;2012;Photoinduced phase switching dynamics between LTP (low-temperature;phase: Fe2+-CN-Mn3+) and PIHTP (photoinduced high-temperature phase:;Fe3+-CN-Mn2+) in rubidium manganese hexacyanoferrate at 4 K was;investigated by visible pump midinfrared probe transient absorption;spectroscopy. By monitoring the CN stretching vibration modes, which are;sensitive to the valence states of the adjacent metal ions, we could;qualify not only LTP and PIHTP but also the phase boundary;configurations (Fe2+-CN-Mn2+ and Fe3+-CN-Mn3+). In addition, by;irradiating with another light inducing the reverse process to the pump;light, we were able to apply a pump-probe measurement to the persistent;phase transitions. The electronic and structural dynamics in the;picosecond region were understood with a phenomenological spectral;fitting model. In particular, in both directions of these phase;transitions, the instantaneous generation of the boundary configuration;was observed. This observation suggests that relatively small domains;and/or low-dimensional fjord-like domains are created at the early stage;of the transition.;1;0;0;0;1;1098-0121;WOS:000311544500006;;;J;Baek, S. -H.;Choi, K. -Y.;Berger, H.;Buechner, B.;Grafe, H. -J.;Persistence of singlet fluctuations in the coupled spin tetrahedra;system Cu2Te2O5Br2 revealed by high-field magnetization, Br-79 NQR, and;Te-125 NMR;PHYSICAL REVIEW B;86;18;180405;10.1103/PhysRevB.86.180405;NOV 26 2012;2012;We present high-field magnetization and Br-79 nuclear quadrupole;resonance (NQR) and Te-125 nuclear magnetic resonance (NMR) studies in;the weakly coupled Cu2+ (S = 1/2) tetrahedral system Cu2Te2O5Br2. The;field-induced level crossing effects were observed by the magnetization;measurements in a long-ranged magnetically ordered state which was;confirmed by a strong divergence of the spin-lattice relaxation rate;T-1(-1) at T-0 = 13.5 K. In the paramagnetic state, T-1(-1) reveals an;effective singlet-triplet spin gap much larger than that observed by;static bulk measurements. Our results imply that the inter-and the;intratetrahedral interactions compete, but at the same time they;cooperate strengthening effectively the local intratetrahedral exchange;couplings. We discuss that the unusual feature originates from the;frustrated intertetrahedral interactions.;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;2;0;0;0;2;1098-0121;WOS:000311543600001;;;J;Beyersdorff, Bjoern;Hankemeier, Sebastian;Roessler, Stefan;Stark, Yuliya;Hoffmann, Germar;Froemter, Robert;Oepen, Hans Peter;Krueger, Benjamin;Thermal effects in spin-torque assisted domain wall depinning;PHYSICAL REVIEW B;86;18;184427;10.1103/PhysRevB.86.184427;NOV 26 2012;2012;We have investigated the magnetization reversal in V-shaped permalloy;(Py) nanowires under high dc currents via anisotropic magnetoresistance;(AMR) measurements. Utilizing a diamond substrate as heat sink, current;densities up to 2 x 10(12) A/m(2) can be applied. These high current;densities enabled us to observe spin-torque assisted switching in;thermal equilibrium, without the influence of transient effects. At high;currents, the field driven magnetization reversal process is influenced;by Joule heating, Oersted fields, and spin-torque effects. These;contributions can be identified in our experiment due to their different;symmetry properties under magnetization and current reversal. We obtain;two important results when evaluating the spin-torque efficiency;epsilon, which is proportional to the nonadiabaticity parameter beta.;First, we find different values for epsilon within the same sample,;obtained with just a slight variation of the experimental parameters.;Second, within the temperature range of 77 to 327 K, epsilon is found to;be constant.;Krueger, Benjamin/B-7466-2009; Hoffmann, Germar/D-8698-2011;Krueger, Benjamin/0000-0001-8502-368X;;2;1;0;0;2;1098-0121;WOS:000311543600004;;;J;Bhosale, J.;Ramdas, A. K.;Burger, A.;Munoz, A.;Romero, A. H.;Cardona, M.;Lauck, R.;Kremer, R. K.;Temperature dependence of band gaps in semiconductors: Electron-phonon;interaction;PHYSICAL REVIEW B;86;19;195208;10.1103/PhysRevB.86.195208;NOV 26 2012;2012;We have theoretically investigated, by ab initio techniques, the phonon;properties of several semiconductors with chalcopyrite structure.;Comparison with experiments has led us to distinguish between materials;with d electrons in the valence band (e. g., CuGaS2, AgGaS2) and those;without d electrons (e. g., ZnSnAs2). The former exhibit a rather;peculiar nonmonotonic temperature dependence of the energy gap which, so;far, has resisted cogent theoretical description. We analyze this;nonmonotonic temperature dependence by fitting two Bose-Einstein;oscillators with weights of opposite sign leading to an increase at low;temperatures and a decrease at higher temperatures and find that the;energy of the former correlates well with characteristic peaks in the;phonon density of states associated with low-energy vibrations of the;d-electron elements. We hope that this work will encourage theoretical;investigations of the electron-phonon interaction in this direction,;especially of the current ab initio type.;Munoz, Alfonso/K-7823-2013;Munoz, Alfonso/0000-0003-3347-6518;14;0;0;0;14;1098-0121;WOS:000311544500007;;;J;Deng, Nianpei;Watson, J. D.;Rokhinson, L. P.;Manfra, M. J.;Csathy, G. A.;Contrasting energy scales of reentrant integer quantum Hall states;PHYSICAL REVIEW B;86;20;201301;10.1103/PhysRevB.86.201301;NOV 26 2012;2012;We report drastically different onset temperatures of the reentrant;integer quantum Hall states in the second and third Landau level. This;finding is in quantitative disagreement with the Hartree-Fock theory of;the bubble phases which is thought to describe these reentrant states.;Our results indicate that the number of electrons per bubble in either;the second or the third Landau level is likely different than predicted.;1;0;0;0;1;1098-0121;WOS:000311545300002;;;J;Ehlert, M.;Song, C.;Ciorga, M.;Utz, M.;Schuh, D.;Bougeard, D.;Weiss, D.;All-electrical measurements of direct spin Hall effect in GaAs with;Esaki diode electrodes;PHYSICAL REVIEW B;86;20;205204;10.1103/PhysRevB.86.205204;NOV 26 2012;2012;We report on measurements of direct spin Hall effect in a lightly;n-doped GaAs channel with conductivity below 2000 Omega(-1) m(-1). As;spin detecting contacts, we employed highly efficient ferromagnetic;Fe/(Ga,Mn)As/GaAs Esaki diode structures. We investigate bias and;temperature dependence of the measured spin Hall signal and evaluate the;value of total spin Hall conductivity and its dependence on channel;conductivity and temperature. From the results, we determine skew;scattering and side-jump contribution to the total spin Hall;conductivity and compare it with the results of experiments on higher;conductive n-GaAs channels [Garlid, Hu, Chan, Palmstrom, and Crowell,;Phys. Rev. Lett. 105, 156602 (2010)]. As a result, we conclude that both;skewness and side jump contribution cannot be treated as fully;independent of the conductivity of the channel.;Song, Cheng/C-9800-2013;3;0;0;0;3;1098-0121;WOS:000311545300006;;;J;Fernandez, L. A.;Gordillo-Guerrero, A.;Martin-Mayor, V.;Ruiz-Lorenzo, J. J.;Numerical test of the Cardy-Jacobsen conjecture in the site-diluted;Potts model in three dimensions;PHYSICAL REVIEW B;86;18;184428;10.1103/PhysRevB.86.184428;NOV 26 2012;2012;present a microcanonical Monte Carlo simulation of the site-diluted;Potts model in three dimensions with eight internal states, partly;carried out on the citizen supercomputer Ibercivis. Upon dilution, the;pure model's first-order transition becomes of the second order at a;tricritical point. We compute accurately the critical exponents at the;tricritical point. As expected from the Cardy-Jacobsen conjecture, they;are compatible with their random field Ising model counterpart. The;conclusion is further reinforced by comparison with older data for the;Potts model with four states.;Fernandez, Luis Antonio/B-6056-2008; Ruiz-Lorenzo, Juan/A-2595-2009; Gordillo-Guerrero, Antonio/C-5531-2009; Martin-Mayor, Victor/B-1790-2010;Fernandez, Luis Antonio/0000-0001-9102-7652; Ruiz-Lorenzo,;Juan/0000-0003-0551-9891; Gordillo-Guerrero,;Antonio/0000-0001-9561-6040;;3;0;0;0;3;1098-0121;WOS:000311543600005;;;J;Fete, A.;Gariglio, S.;Caviglia, A. D.;Triscone, J. -M.;Gabay, M.;
7:3:1:68     Spin polarization in the Hubbard model with Rashba spin-orbit coupling on a ladder
DOI:10.1103/PhysRevB.88.045102  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Riera, Jose A.;
7:3:1:69     Multiorbital structure of the two-dimensional electron gas in LaAlO3/SrTiO3 heterostructures: The formation of a d(xy) ferromagnetic sheet
DOI:10.1103/PhysRevB.87.075411  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Li, Jichao C.;Ignacio Beltran, Juan;Carmen Munoz, M.;
7:3:1:70     Magnetothermopower of delta-doped LaTiO3/SrTiO3 interfaces in the Kondo regime
DOI:10.1103/PhysRevB.90.075133  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Das, Shubhankar;Joshi, P. C.;Rastogi, A.;Hossain, Z.;Budhani, R. C.;
7:3:1:71     Kondo scattering in delta-doped LaTiO3/SrTiO3 interfaces: Renormalization by spin-orbit interactions
DOI:10.1103/PhysRevB.90.081107  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Das, Shubhankar;Rastogi, A.;Wu, Lijun;Zheng, Jin-Cheng;Hossain, Z.;Zhu, Yimei;Budhani, R. C.;
7:3:1:72     Defect Engineering in Oxide Heterostructures by Enhanced Oxygen Surface Exchange
DOI:10.1002/adfm.201203355  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:25  AU: Huijben, Mark;Koster, Gertjan;Kruize, Michelle K.;Wenderich, Sander;Verbeeck, Jo;Bals, Sara;Slooten, Erik;Shi, Bo;Molegraaf, Hajo J. A.;Kleibeuker, Josee E.;van Aert, Sandra;Goedkoop, Jeroen B.;Brinkman, Alexander;Blank, Dave H. A.;Golden, Mark S.;van Tendeloo, Gustaaf;Hilgenkamp, Hans;Rijnders, Guus;
7:3:1:73     Transport properties of LaTiO3/SrTiO3 heterostructures
DOI:10.1063/1.3430006  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Ohtsuka, R.;Matvejeff, M.;Nishio, K.;Takahashi, R.;Lippmaa, M.;
7:3:1:74     Quantum oscillations and subband properties of the two-dimensional electron gas at the LaAlO3/SrTiO3 interface
DOI:10.1063/1.4863786  JN:APL MATERIALS  PY:2014
  TC:8  AU: McCollam, A.;Wenderich, S.;Kruize, M. K.;Guduru, V. K.;Molegraaf, H. J. A.;Huijben, M.;Koster, G.;Blank, D. H. A.;Rijnders, G.;Brinkman, A.;Hilgenkamp, H.;Zeitler, U.;Maan, J. C.;
7:3:1:75     Anomalous Magnetic Ground State in an LaAlO3/SrTiO3 Interface Probed by Transport through Nanowires
DOI:10.1103/PhysRevLett.113.216801  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Ron, A.;Maniv, E.;Graf, D.;Park, J. -H.;Dagan, Y.;
7:3:1:76     Magnetism at the edge: New phenomena at oxide interfaces
DOI:10.1557/mrs.2013.283  JN:MRS BULLETIN  PY:2013
  TC:3  AU: Coey, J. M. D.;Ariando;Pickett, W. E.;
7:3:1:77     Oxide-based platform for reconfigurable superconducting nanoelectronics
DOI:10.1088/0957-4484/24/37/375201  JN:NANOTECHNOLOGY  PY:2013
  TC:7  AU: Veazey, Joshua P.;Cheng, Guanglei;Irvin, Patrick;Cen, Cheng;Bogorin, Daniela F.;Bi, Feng;Huang, Mengchen;Bark, Chung-Wung;Ryu, Sangwoo;Cho, Kwang-Hwan;Eom, Chang-Beom;Levy, Jeremy;
7:3:1:78     Giant spin splitting of the two-dimensional electron gas at the surface of SrTiO3
DOI:10.1038/NMAT4107  JN:NATURE MATERIALS  PY:2014
  TC:8  AU: Santander-Syro, A. F.;Fortuna, F.;Bareille, C.;Roedel, T. C.;Landolt, G.;Plumb, N. C.;Dil, J. H.;Radovic, M.;
7:3:1:79     Fractionally delta-Doped Oxide Superlattices for Higher Carrier Mobilities
DOI:10.1021/nl301844z  JN:NANO LETTERS  PY:2012
  TC:13  AU: Choi, Woo Seok;Lee, Suyoun;Cooper, Valentino R.;Lee, Ho Nyung;
7:3:1:80     Disorder and localization at the LaAlO3/SrTiO3 heterointerface
DOI:10.1103/PhysRevB.82.165413  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Wong, Franklin J.;Chopdekar, Rajesh V.;Suzuki, Yuri;
7:3:1:81     Two-band superconductivity in doped SrTiO3 films and interfaces
DOI:10.1103/PhysRevB.87.014510  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Fernandes, R. M.;Haraldsen, J. T.;Woelfle, P.;Balatsky, A. V.;
7:3:1:82     Biaxial strain-induced transport property changes in atomically tailored SrTiO3-based systems
DOI:10.1103/PhysRevB.90.125156  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Huang, Z.;Liu, Z. Q.;Yang, M.;Zeng, S. W.;Annadi, A.;Lue, W. M.;Tan, X. L.;Chen, P. F.;Sun, L.;Wang, X. Renshaw;Zhao, Y. L.;Li, C. J.;Zhou, J.;Han, K.;Wu, W. B.;Feng, Y. P.;Coey, J. M. D.;Venkatesan, T.;Ariando;
7:3:1:83     Control of a Two-Dimensional Electron Gas on SrTiO3(111) by Atomic Oxygen
DOI:10.1103/PhysRevLett.113.177601  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Walker, S. McKeown;de la Torre, A.;Bruno, F. Y.;Tamai, A.;Kim, T. K.;Hoesch, M.;Shi, M.;Bahramy, M. S.;King, P. D. C.;Baumberger, F.;
7:3:1:84     Spirals and Skyrmions in Two Dimensional Oxide Heterostructures
DOI:10.1103/PhysRevLett.112.067202  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:5  AU: Li, Xiaopeng;Liu, W. Vincent;Balents, Leon;
7:3:1:85     Magnetoresistance of two-dimensional and three-dimensional electron gas in LaAlO3/SrTiO3 heterostructures: Influence of magnetic ordering, interface scattering, and dimensionality
DOI:10.1103/PhysRevB.84.075312  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Wang, X.;Lue, W. M.;Annadi, A.;Liu, Z. Q.;Gopinadhan, K.;Dhar, S.;Venkatesan, T.;Ariando;
7:3:1:86     Photoconducting state and its perturbation by electrostatic fields in oxide-based two-dimensional electron gas
DOI:10.1103/PhysRevB.86.075127  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Rastogi, A.;Pulikkotil, J. J.;Auluck, S.;Hossain, Z.;Budhani, R. C.;
7:3:1:87     Large negative electronic compressibility of LaAlO3-SrTiO3 interfaces with ultrathin LaAlO3 layers
DOI:10.1103/PhysRevB.86.075116  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Tinkl, V.;Breitschaft, M.;Richter, C.;Mannhart, J.;
7:3:1:88     Conduction-band edge and Shubnikov-de Haas effect in low-electron-density SrTiO3
DOI:10.1103/PhysRevB.88.045114  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Allen, S. James;Jalan, Bharat;Lee, SungBin;Ouellette, Daniel G.;Khalsa, Guru;Jaroszynski, Jan;Stemmer, Susanne;MacDonald, Allan H.;
7:3:1:89     Fourfold oscillation in anisotropic magnetoresistance and planar Hall effect at the LaAlO3/SrTiO3 heterointerfaces: Effect of carrier confinement and electric field on magnetic interactions
DOI:10.1103/PhysRevB.87.201102  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Annadi, A.;Huang, Z.;Gopinadhan, K.;Wang, X. Renshaw;Srivastava, A.;Liu, Z. Q.;Ma, H. Harsan;Sarkar, T. P.;Venkatesan, T.;Ariando;
7:3:1:90     Theoretical model for Rashba spin-orbit interaction in d electrons
DOI:10.1103/PhysRevB.90.165108  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Shanavas, K. V.;Popovic, Z. S.;Satpathy, S.;
7:3:1:91     Two-dimensional electron-gas-like charge transport at the interface between a magnetic Heusler alloy and SrTiO3
DOI:10.1103/PhysRevB.89.020401  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Rout, P. K.;Pandey, Himanshu;Wu, Lijun;Anupam;Joshi, P. C.;Hossain, Z.;Zhu, Yimei;Budhani, R. C.;
7:3:1:92     Anisotropic electrical transport properties of a two-dimensional electron gas at SrTiO3-LaAlO3 interfaces
DOI:10.1063/1.3600339  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Brinks, P.;Siemons, W.;Kleibeuker, J. E.;Koster, G.;Rijnders, G.;Huijben, M.;
7:3:1:93     Two-dimensional electron gas in a modulation-doped SrTiO3/Sr(Ti, Zr)O-3 heterostructure
DOI:10.1063/1.4819203  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Kajdos, Adam P.;Ouellette, Daniel G.;Cain, Tyler A.;Stemmer, Susanne;
7:3:1:94     Compositional and gate tuning of the interfacial conductivity in LaAlO3/LaTiO3/SrTiO3 heterostructures
DOI:10.1063/1.4794410  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Hosoda, Masayuki;Bell, Christopher;Hikita, Yasuyuki;Hwang, Harold Y.;
7:3:1:95     Optically excited multi-band conduction in LaAlO3/SrTiO3 heterostructures
DOI:10.1063/1.4790844  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Guduru, V. K.;del Aguila, A. Granados;Wenderich, S.;Kruize, M. K.;McCollam, A.;Christianen, P. C. M.;Zeitler, U.;Brinkman, A.;Rijnders, G.;Hilgenkamp, H.;Maan, J. C.;
7:3:1:96     Measurement of the Femtosecond Optical Absorption of LaAlO3/SrTiO3 Heterostructures: Evidence for an Extremely Slow Electron Relaxation at the Interface
DOI:10.1103/PhysRevLett.111.047403  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Yamada, Yasuhiro;Sato, Hiroki K.;Hikita, Yasuyuki;Hwang, Harold Y.;Kanemitsu, Yoshihiko;
7:3:1:97     Anomalous High Mobility in LaAlO3/SrTiO3 Nanowires
DOI:10.1021/nl3033729  JN:NANO LETTERS  PY:2013
  TC:14  AU: Irvin, Patrick;Veazey, Joshua P.;Cheng, Guanglei;Lu, Shicheng;Bark, Chung-Wung;Ryu, Sangwoo;Eom, Chang-Beom;Levy, Jeremy;
7:3:1:98     Orbital symmetry reconstruction and strong mass renormalization in the two-dimensional electron gas at the surface of KTaO3
DOI:10.1103/PhysRevB.86.121107  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Santander-Syro, A. F.;Bareille, C.;Fortuna, F.;Copie, O.;Gabay, M.;Bertran, F.;Taleb-Ibrahimi, A.;Le Fevre, P.;Herranz, G.;Reyren, N.;Bibes, M.;Barthelemy, A.;Lecoeur, P.;Guevara, J.;Rozenberg, M. J.;
7:3:1:99     Critical thickness for the two-dimensional electron gas in LaTiO3/SrTiO3 superlattices
DOI:10.1103/PhysRevB.88.155111  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: You, Jeong Ho;Lee, Jun Hee;
7:3:1:100     Metal-insulator transition at the LaAlO3/SrTiO3 interface revisited: A hybrid functional study
DOI:10.1103/PhysRevB.88.045119  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Cossu, F.;Schwingenschloegl, U.;Eyert, V.;
7:3:1:101     Universal conductance fluctuations in electrolyte-gated SrTiO3 nanostructures
DOI:10.1063/1.4832555  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Stanwyck, Sam W.;Gallagher, P.;Williams, J. R.;Goldhaber-Gordon, David;
7:3:1:102     Role of Percolation in the Conductance of Electrolyte-Gated SrTiO3
DOI:10.1103/PhysRevLett.109.196803  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:10  AU: Li, Mingyang;Graf, Tanja;Schladt, Thomas D.;Jiang, Xin;Parkin, Stuart S. P.;
7:3:1:103     Two-Dimensional Electron Gases at LaAlO3/SrTiO3 Interfaces: Orbital Symmetry and Hierarchy Engineered by Crystal Orientation
DOI:10.1103/PhysRevLett.113.156802  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Pesquera, D.;Scigaj, M.;Gargiani, P.;Barla, A.;Herrero-Martin, J.;Pellegrin, E.;Valvidares, S. M.;Gazquez, J.;Varela, M.;Dix, N.;Fontcuberta, J.;Sanchez, F.;Herranz, G.;
7:3:1:104     Phase coherent transport in SrTiO3/LaAlO3 interfaces
DOI:10.1103/PhysRevB.82.235119  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Rakhmilevitch, D.;Ben Shalom, M.;Eshkol, M.;Tsukernik, A.;Palevski, A.;Dagan, Y.;
7:3:1:105     Electronic correlation and strain effects at the interfaces between polar and nonpolar complex oxides
DOI:10.1103/PhysRevB.86.085450  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Annadi, A.;Putra, A.;Liu, Z. Q.;Wang, X.;Gopinadhan, K.;Huang, Z.;Dhar, S.;Venkatesan, T.;Ariando;
7:3:1:106     Intrinsic spin-orbit coupling in superconducting delta-doped SrTiO3 heterostructures
DOI:10.1103/PhysRevB.86.085121  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Kim, M.;Kozuka, Y.;Bell, C.;Hikita, Y.;Hwang, H. Y.;
7:3:1:107     Enhanced carrier mobilities in two-dimensional electron gases at III-III/I-V oxide heterostructure interfaces
DOI:10.1103/PhysRevB.85.235109  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Cooper, Valentino R.;
7:3:1:108     Anomalous response to gate voltage application in mesoscopic LaAlO3/SrTiO3 devices
DOI:10.1103/PhysRevB.87.125409  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Rakhmilevitch, D.;Neder, I.;Ben Shalom, M.;Tsukernik, A.;Karpovski, M.;Dagan, Y.;Palevski, A.;
7:3:1:109     Thermally activated recovery of electrical conductivity in LaAlO3/SrTiO3
DOI:10.1103/PhysRevB.87.125110  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Seri, Snir;Schultz, Moty;Klein, Lior;
7:3:1:110     Weak localization, spin relaxation, and spin diffusion: Crossover between weak and strong Rashba coupling limits
DOI:10.1103/PhysRevB.90.125309  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Araki, Yasufumi;Khalsa, Guru;MacDonald, Allan H.;
7:3:1:111     Interfacial effects on the spin density wave in FeSe/SrTiO3 thin films
DOI:10.1103/PhysRevB.89.014501  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Cao, Hai-Yuan;Tan, Shiyong;Xiang, Hongjun;Feng, D. L.;Gong, Xin-Gao;
7:3:1:112     Laterally confined two-dimensional electron gases in self-patterned LaAlO3/SrTiO3 interfaces
DOI:10.1063/1.4728109  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Foerster, M.;Bachelet, R.;Laukhin, V.;Fontcuberta, J.;Herranz, G.;Sanchez, F.;
7:3:1:113     Tunable bilayer two-dimensional electron gas in LaAlO3/SrTiO3 superlattices
DOI:10.1063/1.4887235  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ma, H. J. Harsan;Huang, Z.;Lu, W. M.;Annadi, A.;Zeng, S. W.;Wong, L. M.;Wang, S. J.;Venkatesan, T.;Ariando;
7:3:1:114     Fabricating superconducting interfaces between artificially grown LaAlO3 and SrTiO3 thin films
DOI:10.1063/1.4854335  JN:APL MATERIALS  PY:2014
  TC:5  AU: Li, Danfeng;Gariglio, Stefano;Cancellieri, Claudia;Fete, Alexandre;Stornaiuolo, Daniela;Triscone, Jean-Marc;
7:3:1:115     Oxygen-Vacancy-Induced Orbital Reconstruction of Ti Ions at the Interface of LaAlO3/SrTiO3 Heterostructures: A Resonant Soft-X-Ray Scattering Study
DOI:10.1103/PhysRevLett.110.017401  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:7  AU: Park, J.;Cho, B-G;Kim, K. D.;Koo, J.;Jang, H.;Ko, K-T;Park, J-H;Lee, K-B;Kim, J-Y;Lee, D. R.;Burns, C. A.;Seo, S. S. A.;Lee, H. N.;
7:3:1:116     Density-Functional Prediction of a Surface Magnetic Phase in SrTiO3/LaAlO3 Heterostructures Induced by Al Vacancies
DOI:10.1103/PhysRevLett.113.186401  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Weston, L.;Cui, X. Y.;Ringer, S. P.;Stampfl, C.;
7:3:1:117     One-Dimensional Quantum Wire Formed at the Boundary between Two Insulating LaAlO3/SrTiO3 Interfaces
DOI:10.1103/PhysRevLett.112.136801  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:3  AU: Ron, A.;Dagan, Y.;
7:3:1:118     Nanoscale lithography of LaAlO3/SrTiO3 wires using silicon stencil masks
DOI:10.1088/0957-4484/25/44/445301  JN:NANOTECHNOLOGY  PY:2014
  TC:1  AU: Azimi, S.;Song, J.;Li, C. J.;Mathew, S.;Breese, M. B. H.;Venkatesan, T.;
7:3:1:119     Nanoscale Electrostatic Control of Oxide Interfaces
DOI:10.1021/acs.nanolen.5b00216  JN:NANO LETTERS  PY:2015
  TC:1  AU: Goswami, Srijit;Mulazimoglu, Emre;Vandersypen, Lieven M. K.;Caviglia, Andrea D.;
7:3:1:120     Local electronic structure of the superconducting interface LaAlO3/SrTiO3
DOI:10.1103/PhysRevB.81.144504  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Liu, Bin;Hu, Xiao;
7:3:1:121     Metal-insulator transition of the LaAlO3-SrTiO3 interface electron system
DOI:10.1103/PhysRevB.83.075402  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Liao, Y. C.;Kopp, T.;Richter, C.;Rosch, A.;Mannhart, J.;
7:3:1:122     Electronic and magnetic properties in strongly correlated heterostructures
DOI:10.1103/PhysRevB.85.235112  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Ueda, Suguru;Kawakami, Norio;Sigrist, Manfred;
7:3:1:123     Method for defect stability diagram from ab initio calculations: A case study of SrTiO3
DOI:10.1103/PhysRevB.86.195107  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Samanta, Amit;Weinan, E.;Zhang, S. B.;
7:3:1:124     Intrinsic spin Hall effect at asymmetric oxide interfaces: Role of transverse wave functions
DOI:10.1103/PhysRevB.88.075405  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Hayden, Lorien X.;Raimondi, R.;Flatte, M. E.;Vignale, G.;
7:3:1:125     Electrically Tunable Optical Switching of a Mott Insulator-Band Insulator Interface
DOI:10.1002/adma.201001980  JN:ADVANCED MATERIALS  PY:2010
  TC:21  AU: Rastogi, A.;Kushwaha, A. K.;Shiyani, T.;Gangawar, A.;Budhani, R. C.;
7:3:1:126     Enhancing mid-infrared spectral response at the LaAlO3/SrTiO3 interface by magnetic field
DOI:10.1063/1.4904997  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Feng, Xin;Wu, Shi-Xiang;Zhao, Kun;Ni, Hao;Xi, Jian-Feng;Xiang, Wen-Feng;Lu, Zhi-Qing;Sun, Qi;
7:3:1:127     Spatial density profile of electrons near the LaAlO3/SrTiO3 heterointerface revealed by time-resolved photoluminescence spectroscopy
DOI:10.1063/1.4872171  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yamada, Yasuhiro;Sato, Hiroki K.;Hikita, Yasuyuki;Hwang, Harold Y.;Kanemitsu, Yoshihiko;
7:3:1:128     Current-driven spin orbit field in LaAlO3/SrTiO3 heterostructures
DOI:10.1063/1.4899122  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Narayanapillai, Kulothungasagaran;Gopinadhan, Kalon;Qiu, Xuepeng;Annadi, Anil;Ariando;Venkatesan, Thirumalai;Yang, Hyunsoo;
7:3:1:129     Electric Field Tuning of the Rashba Effect in the Polar Perovskite Structures
DOI:10.1103/PhysRevLett.112.086802  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:2  AU: Shanavas, K. V.;Satpathy, S.;
7:3:1:130     Local electrostatic imaging of striped domain order in LaAlO3/SrTiO3
DOI:10.1038/NMAT3810  JN:NATURE MATERIALS  PY:2013
  TC:14  AU: Honig, M.;Sulpizio, J. A.;Drori, J.;Joshua, A.;Zeldov, E.;Ilani, S.;
7:3:1:131     First-principles study of electronic reconstructions of LaAlO3/SrTiO3 heterointerfaces and their variants
DOI:10.1103/PhysRevB.82.085430  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Chen, Hanghui;Kolpak, Alexie;Ismail-Beigi, Sohrab;
7:3:1:132     Electronic phases and phase separation in the Hubbard-Holstein model of a polar interface
DOI:10.1103/PhysRevB.83.195114  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Nanda, B. R. K.;Satpathy, S.;
7:3:1:133     Interplay between sheet resistance increase and magnetotransport properties in LaAlO3/SrTiO3
DOI:10.1103/PhysRevB.86.085118  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Seri, Snir;Schultz, Moty;Klein, Lior;
7:3:1:134     Enhanced persistent photoconductivity in delta-doped LaAIO(3)/SrTiO3 heterostructures
DOI:10.1103/PhysRevB.89.125127  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Rastogi, A.;Pulikkotil, J. J.;Budhani, R. C.;
7:3:1:135     Two-dimensional electron gas generated by La-doping at SrTiO3(001) surface: A first-principles study
DOI:10.1063/1.4811370  JN:AIP ADVANCES  PY:2013
  TC:1  AU: Li, Yun;Yu, Jaejun;
7:3:1:136     Two-dimensional superconductivity at (110) LaAlO3/SrTiO3 interfaces
DOI:10.1063/1.4901940  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Han, Yin-Long;Shen, Sheng-Chun;You, Jie;Li, Hai-Ou;Luo, Zhong-Zhong;Li, Cheng-Jian;Qu, Guo-Liang;Xiong, Chang-Min;Dou, Rui-Fen;He, Lin;Naugle, Don;Guo, Guo-Ping;Nie, Jia-Cai;
7:3:1:137     Revealing optically induced magnetization in SrTiO3 using optically coupled SQUID magnetometry and magnetic circular dichroism
DOI:10.1116/1.4871691  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2014
  TC:0  AU: Rice, William D.;Ambwani, Palak;Thompson, Joe D.;Leighton, Christopher;Crooker, Scott A.;
7:3:1:138     Low-temperature dependence of the thermomagnetic transport properties of the SrTiO3/LaAlO3 interface
DOI:10.1103/PhysRevB.84.075423  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Lerer, S.;Ben Shalom, M.;Deutscher, G.;Dagan, Y.;
7:3:1:139     Transport properties of a quasi-two-dimensional electron system formed in LaAlO3/EuTiO3/SrTiO3 heterostructures
DOI:10.1103/PhysRevB.89.224413  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: De Luca, G. M.;Di Capua, R.;Di Gennaro, E.;Granozio, F. Miletto;Stornaiuolo, D.;Salluzzo, M.;Gadaleta, A.;Pallecchi, I.;Marre, D.;Piamonteze, C.;Radovic, M.;Ristic, Z.;Rusponi, S.;
7:3:1:140     Interlayer Cation Exchange Stabilizes Polar Perovskite Surfaces
DOI:10.1002/adma.201401858  JN:ADVANCED MATERIALS  PY:2014
  TC:2  AU: Deacon-Smith, Daniel E. E.;Scanlon, David O.;Catlow, C. Richard A.;Sokol, Alexey A.;Woodley, Scott M.;
7:3:1:141     Evolution of variable range hopping in strongly localized two dimensional electron gas at NdAlO3/SrTiO3 (100) heterointerfaces
DOI:10.1063/1.4768932  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Annadi, A.;Putra, A.;Srivastava, A.;Wang, X.;Huang, Z.;Liu, Z. Q.;Venkatesan, T.;Ariando;
7:3:1:142     Two-dimensional superconductivity between SrTiO3 and amorphous Al2O3
DOI:10.1063/1.4895120  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Fuchs, Dirk;Schaefer, Roland;Sleem, Ahmed;Schneider, Rudolf;Thelen, Richard;von Loehneysen, Hilbert;
7:3:1:143     Conductance control at the LaAlO3/SrTiO3-interface by a multiferroic BiFeO3 ad-layer
DOI:10.1063/1.4886405  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Mix, Christian;Finizio, Simone;Klaeui, Mathias;Jakob, Gerhard;
7:3:1:144     Electron transport at interface of LaAlO3 and SrTiO3 band insulators
DOI:10.1063/1.4794057  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Su, Shanshan;You, Jeong Ho;Lee, Chibum;
7:3:1:145     Oxygen vacancies at the surface of SrTiO3 thin films
DOI:10.1063/1.4861730  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Silva, Alexandre R.;Dalpian, Gustavo M.;
7:3:1:146     Electric-Field- Induced Polar Order and Localization of the Confined Electrons in LaAlO3=SrTiO3 Heterostructures
DOI:10.1103/PhysRevLett.110.136805  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Roessle, M.;Kim, K. W.;Dubroka, A.;Marsik, P.;Wang, C. N.;Jany, R.;Richter, C.;Mannhart, J.;Schneider, C. W.;Frano, A.;Wochner, P.;Lu, Y.;Keimer, B.;Shukla, D. K.;Strempfer, J.;Bernhard, C.;
7:3:1:147     Tuning Ferromagnetism at Interfaces between Insulating Perovskite Oxides
DOI:10.1103/PhysRevLett.113.127201  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Ganguli, Nirmal;Kelly, Paul J.;
7:3:1:148     Titanium d(xy) ferromagnetism at the LaAlO3/SrTiO3 interface
DOI:10.1038/NMAT3674  JN:NATURE MATERIALS  PY:2013
  TC:63  AU: Lee, J. -S.;Xie, Y. W.;Sato, H. K.;Bell, C.;Hikita, Y.;Hwang, H. Y.;Kao, C. -C.;
7:3:1:149     Scanning Probe Manipulation of Magnetism at the LaAlO3/SrTiO3 Heterointerface
DOI:10.1021/nl301451e  JN:NANO LETTERS  PY:2012
  TC:9  AU: Kalisky, Beena;Bert, Julie A.;Bell, Christopher;Xie, Yanwu;Sato, Hiroki K.;Hosoda, Masayuki;Hikita, Yasuyuki;Hwang, Harold Y.;Moler, Kathryn A.;
7:3:1:150     Magnetotransport and spin dynamics in an electron gas formed at oxide interfaces
DOI:10.1103/PhysRevB.83.045309  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Jia, Chenglong;Berakdar, Jamal;
7:3:1:151     Atomically flat interface between a single-terminated LaAlO3 substrate and SrTiO3 thin film is insulating
DOI:10.1063/1.3688772  JN:AIP ADVANCES  PY:2012
  TC:6  AU: Liu, Z. Q.;Huang, Z.;Lue, W. M.;Gopinadhan, K.;Wang, X.;Annadi, A.;Venkatesan, T.;Ariando;
7:3:1:152     Alleviating polarity-conflict at the heterointerfaces of KTaO3/GdScO3 polar complex-oxides
DOI:10.1063/1.4895392  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Thompson, J.;Hwang, J.;Nichols, J.;Connell, J. G.;Stemmer, S.;Seo, S. S. A.;
7:3:1:153     Polarization and Electric Field Dependence of Electronic Properties in LaAlO3/SrTiO3 Heterostructures
DOI:10.1021/am201115r  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2011
  TC:7  AU: Yang, Xiaoping;Su, Haibin;
7:3:1:154     Multiple quantum criticality in a two-dimensional superconductor
DOI:10.1038/NMAT3624  JN:NATURE MATERIALS  PY:2013
  TC:20  AU: Biscaras, J.;Bergeal, N.;Hurand, S.;Feuillet-Palma, C.;Rastogi, A.;Budhani, R. C.;Grilli, M.;Caprara, S.;Lesueur, J.;
7:3:1:155     Local probing of coupled interfaces between two-dimensional electron and hole gases in oxide heterostructures by variable-temperature scanning tunneling spectroscopy
DOI:10.1103/PhysRevB.86.035140  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Huijben, M.;Kockmann, D.;Huijben, J.;Kleibeuker, J. E.;van Houselt, A.;Koster, G.;Blank, D. H. A.;Hilgenkamp, H.;Rijnders, G.;Brinkman, A.;Zandvliet, H. J. W.;
7:3:1:156     Electronic reconstruction and surface two-dimensional electron gas in a polarized heterostructure with a hole-doped single copper-oxygen plane
DOI:10.1103/PhysRevB.87.205116  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Yang, Xiaoping;Su, Haibin;
7:3:1:157     Influence of doping at the nanoscale at LaAlO3/SrTiO3 interfaces
DOI:10.1063/1.3481353  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Fix, T.;Schoofs, F.;MacManus-Driscoll, J. L.;Blamire, M. G.;
7:3:1:158     Quasi-two-dimensional electron gas behavior in doped LaAlO3 thin films on SrTiO3 substrates
DOI:10.1063/1.4800232  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Gray, M. T.;Sanders, T. D.;Wong, F. J.;Grutter, A. J.;Alaan, U. S.;He, C.;Jenkins, C. A.;Arenholz, E.;Suzuki, Y.;
7:3:1:159     Modulation of conductance and superconductivity by top-gating in LaAlO3/SrTiO3 2-dimensional electron systems
DOI:10.1063/1.4829555  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Eerkes, P. D.;van der Wiel, W. G.;Hilgenkamp, H.;
7:3:1:160     Enhancing interfacial conductivity and spatial charge confinement of LaAlO3/SrTiO3 heterostructures via strain engineering
DOI:10.1063/1.4897626  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Nazir, Safdar;Behtash, Maziar;Yang, Kesong;
7:3:1:161     Persistent Spin Oscillations in a Spin-Orbit-Coupled Superconductor
DOI:10.1103/PhysRevLett.107.077004  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:2  AU: Agarwal, Amit;Polini, Marco;Fazio, Rosario;Vignale, G.;
7:3:1:162     Low-temperature dependence of the thermomagnetic transport properties of the SrTiO3/LaAlO3 interface (vol 84, 075423, 2011)
DOI:10.1103/PhysRevB.84.119905  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Lerer, S.;Ben Shalom, M.;Deutscher, G.;Dagan, Y.;
7:3:1:163     Many-body effects on the capacitance of multilayers made from strongly correlated materials
DOI:10.1103/PhysRevB.85.205444  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Hale, S. T. F.;Freericks, J. K.;
7:3:1:164     k center dot p subband structure of the LaAlO3/SrTiO3 interface
DOI:10.1103/PhysRevB.88.205140  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:3:1:165     Ion beam irradiation induced fabrication of vertical coupling waveguides
DOI:10.1063/1.4801307  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Liang, H. D.;Kumar, V. S.;Wu, J. F.;Breese, M. B. H.;
7:3:1:166     Electron excess in alkaline earth sub-nitrides: 2D electron gas or 3D electride?
DOI:10.1039/c3tc30690a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:5  AU: Walsh, Aron;Scanlon, David O.;
7:3:2:1     Low-dimensional Mott material: Transport in ultrathin epitaxial LaNiO3 films
DOI:10.1063/1.3309713  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:67  AU: Son, Junwoo;Moetakef, Pouya;LeBeau, James M.;Ouellette, Daniel;Balents, Leon;Allen, S. James;Stemmer, Susanne;
7:3:2:2     Electric-Field Control of the Metal-Insulator Transition in Ultrathin NdNiO3 Films
DOI:10.1002/adma.201003241  JN:ADVANCED MATERIALS  PY:2010
  TC:87  AU: Scherwitzl, Raoul;Zubko, Pavlo;Lezama, I. Gutierrez;Ono, Shimpei;Morpurgo, Alberto F.;Catalan, Gustau;Triscone, Jean-Marc;
7:3:2:3     Quantum confinement of Mott electrons in ultrathin LaNiO3/LaAlO3 superlattices
DOI:10.1103/PhysRevB.83.161102  JN:PHYSICAL REVIEW B  PY:2011
  TC:47  AU: Liu, Jian;Okamoto, S.;van Veenendaal, M.;Kareev, M.;Gray, B.;Ryan, P.;Freeland, J. W.;Chakhalian, J.;
7:3:2:4     Metal-Insulator Transition in Ultrathin LaNiO3 Films
DOI:10.1103/PhysRevLett.106.246403  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:49  AU: Scherwitzl, R.;Gariglio, S.;Gabay, M.;Zubko, P.;Gibert, M.;Triscone, J-M;
7:3:2:5     Quantum confinement in oxide quantum wells
DOI:10.1557/mrs.2013.265  JN:MRS BULLETIN  PY:2013
  TC:6  AU: Stemmer, Susanne;Millis, Andrew J.;
7:3:2:6     Asymmetric Orbital-Lattice Interactions in Ultrathin Correlated Oxide Films
DOI:10.1103/PhysRevLett.107.116805  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:49  AU: Chakhalian, J.;Rondinelli, J. M.;Liu, Jian;Gray, B. A.;Kareev, M.;Moon, E. J.;Prasai, N.;Cohn, J. L.;Varela, M.;Tung, I. C.;Bedzyk, M. J.;Altendorf, S. G.;Strigari, F.;Dabrowski, B.;Tjeng, L. H.;Ryan, P. J.;Freeland, J. W.;
7:3:2:7     Structural origins of the properties of rare earth nickelate superlattices
DOI:10.1103/PhysRevB.87.060101  JN:PHYSICAL REVIEW B  PY:2013
  TC:15  AU: Hwang, Jinwoo;Son, Junwoo;Zhang, Jack Y.;Janotti, Anderson;Van de Walle, Chris G.;Stemmer, Susanne;
7:3:2:8     Site-Selective Mott Transition in Rare-Earth-Element Nickelates
DOI:10.1103/PhysRevLett.109.156402  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:31  AU: Park, Hyowon;Millis, Andrew J.;Marianetti, Chris A.;
7:3:2:9     Metal-insulator transition in a two-band model for the perovskite nickelates
DOI:10.1103/PhysRevB.84.165119  JN:PHYSICAL REVIEW B  PY:2011
  TC:30  AU: Lee, SungBin;Chen, Ru;Balents, Leon;
7:3:2:10     Confinement-induced metal-to-insulator transition in strained LaNiO3/LaAlO3 superlattices
DOI:10.1103/PhysRevB.84.195450  JN:PHYSICAL REVIEW B  PY:2011
  TC:18  AU: Blanca-Romero, Ariadna;Pentcheva, Rossitza;
7:3:2:11     Lattice normal modes and electronic properties of the correlated metal LaNiO3
DOI:10.1103/PhysRevB.84.144101  JN:PHYSICAL REVIEW B  PY:2011
  TC:24  AU: Gou, Gaoyang;Grinberg, Ilya;Rappe, Andrew M.;Rondinelli, James M.;
7:3:2:12     Strain-mediated metal-insulator transition in epitaxial ultrathin films of NdNiO3
DOI:10.1063/1.3451462  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:33  AU: Liu, Jian;Kareev, M.;Gray, B.;Kim, J. W.;Ryan, P.;Dabrowski, B.;Freeland, J. W.;Chakhalian, J.;
7:3:2:13     Dynamical Mean-Field Theory of Nickelate Superlattices
DOI:10.1103/PhysRevLett.107.206804  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:28  AU: Han, M. J.;Wang, Xin;Marianetti, C. A.;Millis, A. J.;
7:3:2:14     Theory of the Magnetic and Metal-Insulator Transitions in RNiO3 Bulk and Layered Structures
DOI:10.1103/PhysRevLett.110.126404  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:11  AU: Lau, Bayo;Millis, Andrew J.;
7:3:2:15     Comparative DMFT study of the e(g)-orbital Hubbard model in thin films
DOI:10.1103/PhysRevB.89.085122  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Rueegg, Andreas;Hung, Hsiang-Hsuan;Gull, Emanuel;Fiete, Gregory A.;
7:3:2:16     Metal-Insulator Transition and Orbital Reconstruction in Mott-Type Quantum Wells Made of NdNiO3
DOI:10.1103/PhysRevLett.109.107402  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:11  AU: Liu, Jian;Kareev, M.;Meyers, D.;Gray, B.;Ryan, P.;Freeland, J. W.;Chakhalian, J.;
7:3:2:17     Orbital Control of Noncollinear Magnetic Order in Nickel Oxide Heterostructures
DOI:10.1103/PhysRevLett.111.106804  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:16  AU: Frano, A.;Schierle, E.;Haverkort, M. W.;Lu, Y.;Wu, M.;Blanco-Canosa, S.;Nwankwo, U.;Boris, A. V.;Wochner, P.;Cristiani, G.;Habermeier, H. U.;Logvenov, G.;Hinkov, V.;Benckiser, E.;Weschke, E.;Keimer, B.;
7:3:2:18     Chemical control of orbital polarization in artificially structured transition-metal oxides: La2NiXO6 (X=B, Al, Ga, In) from first principles
DOI:10.1103/PhysRevB.82.134408  JN:PHYSICAL REVIEW B  PY:2010
  TC:30  AU: Han, M. J.;Marianetti, C. A.;Millis, A. J.;
7:3:2:19     Orbital polarization in strained LaNiO3: Structural distortions and correlation effects
DOI:10.1103/PhysRevB.90.045128  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Peil, Oleg E.;Ferrero, Michel;Georges, Antoine;
7:3:2:20     Confinement-driven transitions between topological and Mott phases in (LaNiO3)(N)/(LaAlO3)(M)(111) superlattices
DOI:10.1103/PhysRevB.89.121110  JN:PHYSICAL REVIEW B  PY:2014
  TC:4  AU: Doennig, David;Pickett, Warren E.;Pentcheva, Rossitza;
7:3:2:21     Electronic structure of nickelates: From two-dimensional heterostructures to three-dimensional bulk materials
DOI:10.1103/PhysRevB.82.235123  JN:PHYSICAL REVIEW B  PY:2010
  TC:25  AU: Hansmann, P.;Toschi, A.;Yang, Xiaoping;Andersen, O. K.;Held, K.;
7:3:2:22     Hallmark of strong electronic correlations in LaNiO3: Photoemission kink and broadening of fully occupied bands
DOI:10.1103/PhysRevB.85.125137  JN:PHYSICAL REVIEW B  PY:2012
  TC:15  AU: Deng, Xiaoyu;Ferrero, Michel;Mravlje, Jernej;Aichhorn, Markus;Georges, Antoine;
7:3:2:23     Interplay of octahedral rotations and breathing distortions in charge-ordering perovskite oxides
DOI:10.1103/PhysRevB.88.054101  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Balachandran, Prasanna V.;Rondinelli, James M.;
7:3:2:24     Covalency, double-counting, and the metal-insulator phase diagram in transition metal oxides
DOI:10.1103/PhysRevB.86.195136  JN:PHYSICAL REVIEW B  PY:2012
  TC:17  AU: Wang, Xin;Han, M. J.;de' Medici, Luca;Park, Hyowon;Marianetti, C. A.;Millis, Andrew J.;
7:3:2:25     Landau Theory of Charge and Spin Ordering in the Nickelates
DOI:10.1103/PhysRevLett.106.016405  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:22  AU: Lee, SungBin;Chen, Ru;Balents, Leon;
7:3:2:26     Modifying the Electronic Orbitals of Nickelate Heterostructures via Structural Distortions
DOI:10.1103/PhysRevLett.110.186402  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:10  AU: Chen, Hanghui;Kumah, Divine P.;Disa, Ankit S.;Walker, Frederick J.;Ahn, Charles H.;Ismail-Beigi, Sohrab;
7:3:2:27     Optical study of strained ultrathin films of strongly correlated LaNiO3
DOI:10.1103/PhysRevB.83.075125  JN:PHYSICAL REVIEW B  PY:2011
  TC:19  AU: Stewart, M. K.;Yee, C. -H.;Liu, Jian;Kareev, M.;Smith, R. K.;Chapler, B. C.;Varela, M.;Ryan, P. J.;Haule, K.;Chakhalian, J.;Basov, D. N.;
7:3:2:28     Strain and composition dependence of orbital polarization in nickel oxide superlattices
DOI:10.1103/PhysRevB.88.125124  JN:PHYSICAL REVIEW B  PY:2013
  TC:9  AU: Wu, M.;Benckiser, E.;Haverkort, M. W.;Frano, A.;Lu, Y.;Nwankwo, U.;Brueck, S.;Audehm, P.;Goering, E.;Macke, S.;Hinkov, V.;Wochner, P.;Christiani, G.;Heinze, S.;Logvenov, G.;Habermeier, H. -U.;Keimer, B.;
7:3:2:29     Nanoscale quantification of octahedral tilts in perovskite films
DOI:10.1063/1.4714734  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:19  AU: Hwang, Jinwoo;Zhang, Jack Y.;Son, Junwoo;Stemmer, Susanne;
7:3:2:30     Mott Physics near the Insulator-To-Metal Transition in NdNiO3
DOI:10.1103/PhysRevLett.107.176401  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:21  AU: Stewart, M. K.;Liu, Jian;Kareev, M.;Chakhalian, J.;Basov, D. N.;
7:3:2:31     Optical conductivity of LaNiO3: Coherent transport and correlation driven mass enhancement
DOI:10.1103/PhysRevB.82.165112  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Ouellette, Daniel G.;Lee, SungBin;Son, Junwoo;Stemmer, Susanne;Balents, Leon;Millis, Andrew J.;Allen, S. James;
7:3:2:32     Ordering and multiple phase transitions in ultrathin nickelate superlattices
DOI:10.1103/PhysRevB.86.195132  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Puggioni, Danilo;Filippetti, Alessio;Fiorentini, Vincenzo;
7:3:2:33     Tuning the Structure of Nickelates to Achieve Two-Dimensional Electron Conduction
DOI:10.1002/adma.201304256  JN:ADVANCED MATERIALS  PY:2014
  TC:8  AU: Kumah, Divine P.;Disa, Ankit S.;Ngai, Joseph H.;Chen, Hanghui;Malashevich, Andrei;Reiner, James W.;Ismail-Beigi, Sohrab;Walker, Frederick J.;Ahn, Charles H.;
7:3:2:34     Conductivity enhancement of ultrathin LaNiO3 films in superlattices
DOI:10.1063/1.3511738  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Son, Junwoo;LeBeau, James M.;Allen, S. James;Stemmer, Susanne;
7:3:2:35     Heterostructuring and strain effects on the infrared optical properties of nickelates
DOI:10.1103/PhysRevB.86.205102  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Stewart, M. K.;Brownstead, D.;Liu, Jian;Kareev, M.;Chakhalian, J.;Basov, D. N.;
7:3:2:36     Strain-modulated Mott transition in EuNiO3 ultrathin films
DOI:10.1103/PhysRevB.88.075116  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Meyers, D.;Middey, S.;Kareev, M.;van Veenendaal, M.;Moon, E. J.;Gray, B. A.;Liu, Jian;Freeland, J. W.;Chakhalian, J.;
7:3:2:37     Octahedral engineering of orbital polarizations in charge transfer oxides
DOI:10.1103/PhysRevB.87.155135  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Cammarata, Antonio;Rondinelli, James M.;
7:3:2:38     Gradual localization of Ni 3d states in LaNiO3 ultrathin films induced by dimensional crossover
DOI:10.1103/PhysRevB.87.075132  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Sakai, Enju;Tamamitsu, Masatomo;Yoshimatsu, Kohei;Okamoto, Satoshi;Horiba, Koji;Oshima, Masaharu;Kumigashira, Hiroshi;
7:3:2:39     Hall effect measurements on epitaxial SmNiO3 thin films and implications for antiferromagnetism
DOI:10.1103/PhysRevB.87.125150  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Ha, Sieu D.;Jaramillo, R.;Silevitch, D. M.;Schoofs, Frank;Kerman, Kian;Baniecki, John D.;Ramanathan, Shriram;
7:3:2:40     Two-Dimensional Confinement of 3d(1) Electrons in LaTiO3/LaAlO3 Multilayers
DOI:10.1103/PhysRevLett.104.036401  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:23  AU: Seo, S. S. A.;Han, M. J.;Hassink, G. W. J.;Choi, W. S.;Moon, S. J.;Kim, J. S.;Susaki, T.;Lee, Y. S.;Yu, J.;Bernhard, C.;Hwang, H. Y.;Rijnders, G.;Blank, D. H. A.;Keimer, B.;Noh, T. W.;
7:3:2:41     Spin-moment formation and reduced orbital polarization in LaNiO3/LaAlO3 superlattice: LDA plus U study
DOI:10.1103/PhysRevB.85.195102  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Han, Myung Joon;van Veenendaal, Michel;
7:3:2:42     Total energy calculations using DFT plus DMFT: Computing the pressure phase diagram of the rare earth nickelates
DOI:10.1103/PhysRevB.89.245133  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Park, Hyowon;Millis, Andrew J.;Marianetti, Chris A.;
7:3:2:43     Probing the metal-insulator transition of NdNiO3 by electrostatic doping
DOI:10.1063/1.3659310  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Son, Junwoo;Jalan, Bharat;Kajdos, Adam P.;Balents, Leon;Allen, S. James;Stemmer, Susanne;
7:3:2:44     A heterojunction modulation-doped Mott transistor
DOI:10.1063/1.3651612  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:21  AU: Son, Junwoo;Rajan, Siddharth;Stemmer, Susanne;Allen, S. James;
7:3:2:45     Strain controlled metal-insulator transition in epitaxial NdNiO3 thin films
DOI:10.1063/1.4858455  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Xiang, P. -H.;Zhong, N.;Duan, C. -G.;Tang, X. D.;Hu, Z. G.;Yang, P. X.;Zhu, Z. Q.;Chu, J. H.;
7:3:2:46     Ultrafast Strain Engineering in Complex Oxide Heterostructures
DOI:10.1103/PhysRevLett.108.136801  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:21  AU: Caviglia, A. D.;Scherwitzl, R.;Popovich, P.;Hu, W.;Bromberger, H.;Singla, R.;Mitrano, M.;Hoffmann, M. C.;Kaiser, S.;Zubko, P.;Gariglio, S.;Triscone, J. -M.;Foerst, M.;Cavalleri, A.;
7:3:2:47     Effect of polar discontinuity on the growth of LaNiO3/LaAlO3 superlattices
DOI:10.1063/1.3371690  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:19  AU: Liu, Jian;Kareev, M.;Prosandeev, S.;Gray, B.;Ryan, P.;Freeland, J. W.;Chakhalian, J.;
7:3:2:48     Polarity-driven nickel oxide precipitation in LaNiO3-LaAlO3 superlattices
DOI:10.1063/1.3663568  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Detemple, E.;Ramasse, Q. M.;Sigle, W.;Cristiani, G.;Habermeier, H. -U.;Benckiser, E.;Boris, A. V.;Frano, A.;Wochner, P.;Wu, M.;Keimer, B.;van Aken, P. A.;
7:3:2:49     Electrically induced insulator to metal transition in epitaxial SmNiO3 thin films
DOI:10.1063/1.4890329  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Shukla, Nikhil;Joshi, Toyanath;Dasgupta, Sandeepan;Borisov, Pavel;Lederman, David;Datta, Suman;
7:3:2:50     Lattice distortions and octahedral rotations in epitaxially strained LaNiO3/LaAlO3 superlattices
DOI:10.1063/1.4881557  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Kinyanjui, M. K.;Lu, Y.;Gauquelin, N.;Wu, M.;Frano, A.;Wochner, P.;Reehuis, M.;Christiani, G.;Logvenov, G.;Habermeier, H. -U.;Botton, G. A.;Kaiser, U.;Keimer, B.;Benckiser, E.;
7:3:2:51     Optical probe of strong correlations in LaNiO3 thin films
DOI:10.1063/1.3614019  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:17  AU: Stewart, M. K.;Liu, Jian;Smith, R. K.;Chapler, B. C.;Yee, C. -H.;Meyers, D.;Baumbach, R. E.;Maple, M. B.;Haule, K.;Chakhalian, J.;Basov, D. N.;
7:3:2:52     Formal Valence, 3d-Electron Occupation, and Charge-Order Transitions
DOI:10.1103/PhysRevLett.109.216401  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:10  AU: Quan, Yundi;Pardo, Victor;Pickett, Warren E.;
7:3:2:53     Electronic structure and orbital polarization of LaNiO3 with a reduced coordination and under strain: A first-principles study
DOI:10.1103/PhysRevB.84.125137  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Han, Myung Joon;van Veenendaal, Michel;
7:3:2:54     Connecting bulk symmetry and orbital polarization in strained RNiO3 ultrathin films
DOI:10.1103/PhysRevB.88.205112  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Tung, I. C.;Balachandran, P. V.;Liu, Jian;Gray, B. A.;Karapetrova, E. A.;Lee, J. H.;Chakhalian, J.;Bedzyk, M. J.;Rondinelli, J. M.;Freeland, J. W.;
7:3:2:55     Rationalizing strain engineering effects in rare-earth nickelates
DOI:10.1103/PhysRevB.88.195108  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Bruno, F. Y.;Rushchanskii, K. Z.;Valencia, S.;Dumont, Y.;Carretero, C.;Jacquet, E.;Abrudan, R.;Bluegel, S.;Lezaic, M.;Bibes, M.;Barthelemy, A.;
7:3:2:56     Engineering Correlation Effects via Artificially Designed Oxide Superlattices
DOI:10.1103/PhysRevLett.111.116403  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Chen, Hanghui;Millis, Andrew J.;Marianetti, Chris A.;
7:3:2:57     Strain-controlled band engineering and self-doping in ultrathin LaNiO3 films
DOI:10.1103/PhysRevB.85.121106  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Moon, E. J.;Rondinelli, J. M.;Prasai, N.;Gray, B. A.;Kareev, M.;Chakhalian, J.;Cohn, J. L.;
7:3:2:58     Field-effect diode based on electron-induced Mott transition in NdNiO3
DOI:10.1063/1.4757865  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Lim, W. L.;Moon, E. J.;Freeland, J. W.;Meyers, D. J.;Kareev, M.;Chakhalian, J.;Urazhdin, S.;
7:3:2:59     Ab initio study of the factors affecting the ground state of rare-earth nickelates
DOI:10.1103/PhysRevB.85.214431  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Prosandeev, Sergey;Bellaiche, L.;Iniguez, Jorge;
7:3:2:60     Quasiparticle self-consistent GW study of LaNiO3 and LaNiO3/LaAlO3 superlattice
DOI:10.1103/PhysRevB.90.035127  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Han, Myung Joon;Kino, Hiori;Kotani, Takao;
7:3:2:61     Phonon Raman scattering of perovskite LaNiO3 thin films
DOI:10.1063/1.3464958  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Chaban, N.;Weber, M.;Pignard, S.;Kreisel, J.;
7:3:2:62     Electrostatic gating of metallic and insulating phases in SmNiO3 ultrathin films
DOI:10.1063/1.4804142  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Ha, Sieu D.;Vetter, Ulrich;Shi, Jian;Ramanathan, Shriram;
7:3:2:63     Temperature-dependence of the Hall coefficient of NdNiO3 thin films
DOI:10.1063/1.4828557  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Hauser, Adam J.;Mikheev, Evgeny;Moreno, Nelson E.;Cain, Tyler A.;Hwang, Jinwoo;Zhang, Jack Y.;Stemmer, Susanne;
7:3:2:64     Ruddlesden-Popper faults in LaNiO3/LaAlO3 superlattices
DOI:10.1063/1.4731249  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Detemple, E.;Ramasse, Q. M.;Sigle, W.;Cristiani, G.;Habermeier, H. -U.;Keimer, B.;van Aken, P. A.;
7:3:2:65     Suppression of Near-Fermi Level Electronic States at the Interface in a LaNiO3/SrTiO3 Superlattice
DOI:10.1103/PhysRevLett.107.116402  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:9  AU: Kaiser, A. M.;Gray, A. X.;Conti, G.;Son, J.;Greer, A.;Perona, A.;Rattanachata, A.;Saw, A. Y.;Bostwick, A.;Yang, S.;Yang, S. -H.;Gullikson, E. M.;Kortright, J. B.;Stemmer, S.;Fadley, C. S.;
7:3:2:66     Charge Disproportionation without Charge Transfer in the Rare-Earth-Element Nickelates as a Possible Mechanism for the Metal-Insulator Transition
DOI:10.1103/PhysRevLett.112.106404  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:3  AU: Johnston, Steve;Mukherjee, Anamitra;Elfimov, Ilya;Berciu, Mona;Sawatzky, George A.;
7:3:2:67     Effect of composition and strain on the electrical properties of LaNiO3 thin films
DOI:10.1063/1.4823697  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Zhu, Mingwei;Komissinskiy, Philipp;Radetinac, Aldin;Vafaee, Mehran;Wang, Zhanjie;Alff, Lambert;
7:3:2:68     Electronic transitions in strained SmNiO3 thin films
DOI:10.1063/1.4902138  JN:APL MATERIALS  PY:2014
  TC:4  AU: Catalano, S.;Gibert, M.;Bisogni, V.;Peil, O. E.;He, F.;Sutarto, R.;Viret, M.;Zubko, P.;Scherwitzl, R.;Georges, A.;Sawatzky, G. A.;Schmitt, T.;Triscone, J. -M.;
7:3:2:69     Structural stability and electronic properties of LaO- and NiO2-terminated LaNiO3 (001) surface
DOI:10.1016/j.apsusc.2012.10.066  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: Guan, Li;Zuo, Jingai;Jia, Guoqi;Liu, Qingbo;Wei, Wei;Guo, Jianxin;Dai, Xiuhong;Liu, Baoting;Wang, Yinglong;Fu, Guangsheng;
7:3:2:70     Charge transfer and interfacial magnetism in (LaNiO3)(n)/(LaMnO3)(2) superlattices
DOI:10.1103/PhysRevB.88.144411  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Hoffman, J.;Tung, I. C.;Nelson-Cheeseman, B. B.;Liu, M.;Freeland, J. W.;Bhattacharya, A.;
7:3:2:71     Anisotropic-strain-controlled metal-insulator transition in epitaxial NdNiO3 films grown on orthorhombic NdGaO3 substrates
DOI:10.1063/1.4826678  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Lian, X. K.;Chen, F.;Tan, X. L.;Chen, P. F.;Wang, L. F.;Gao, G. Y.;Jin, S. W.;Wu, W. B.;
7:3:2:72     Charge transfer, confinement, and ferromagnetism in LaMnO3/LaNiO3 (001) superlattices
DOI:10.1103/PhysRevB.88.035126  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Lee, Alex Taekyung;Han, Myung Joon;
7:3:2:73     Sub-monolayer nucleation and growth of complex oxides at high supersaturation and rapid flux modulation
DOI:10.1063/1.3590146  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Kareev, M.;Prosandeev, S.;Gray, B.;Liu, Jian;Ryan, P.;Kareev, A.;Moon, Eun Ju;Chakhalian, J.;
7:3:2:74     Contrasting effects of doping on insulating and metallic states of NdNi1-xMnxO3 thin films
DOI:10.1063/1.4866999  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chandra, Mahesh;Aziz, Fozia;Tripathi, Shivendra;Rana, Rakesh;Rana, D. S.;Mavani, K. R.;
7:3:2:75     Insulating state of ultrathin epitaxial LaNiO3 thin films detected by hard x-ray photoemission
DOI:10.1103/PhysRevB.84.075104  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Gray, A. X.;Janotti, A.;Son, J.;LeBeau, J. M.;Ueda, S.;Yamashita, Y.;Kobayashi, K.;Kaiser, A. M.;Sutarto, R.;Wadati, H.;Sawatzky, G. A.;Van de Walle, C. G.;Stemmer, S.;Fadley, C. S.;
7:3:2:76     Probing the metal-insulator transition in nickelates using soft x-ray absorption spectroscopy
DOI:10.1063/1.4861132  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Bruno, F. Y.;Valencia, S.;Abrudan, R.;Dumont, Y.;Carretero, C.;Bibes, M.;Barthelemy, A.;
7:3:2:77     Electrothermal actuation of metal-insulator transition in SmNiO3 thin film devices above room temperature
DOI:10.1063/1.4729490  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Ha, Sieu D.;Viswanath, B.;Ramanathan, Shriram;
7:3:2:78     Pressure dependence of metal-insulator transition in perovskites RNiO3 (R=Eu, Y, Lu)
DOI:10.1103/PhysRevB.82.085107  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Cheng, J-G.;Zhou, J-S.;Goodenough, J. B.;Alonso, J. A.;Martinez-Lope, M. J.;
7:3:2:79     Effect of structural and magnetic exchange coupling on the electronic transport of NdNiO3 films intercalated with La0.7Sr0.3MnO3 thin layers
DOI:10.1063/1.4813490  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Pandey, Parul;Rana, Rakesh;Tripathi, Shivendra;Rana, D. S.;
7:3:2:80     Phase diagram of compressively strained nickelate thin films
DOI:10.1063/1.4820431  JN:APL MATERIALS  PY:2013
  TC:9  AU: Disa, A. S.;Kumah, D. P.;Ngai, J. H.;Specht, E. D.;Arena, D. A.;Walker, F. J.;Ahn, C. H.;
7:3:2:81     Heterogeneous nucleation and metal-insulator transition in epitaxial films of NdNiO3
DOI:10.1063/1.3481396  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Kumar, Devendra;Rajeev, K. P.;Kushwaha, A. K.;Budhani, R. C.;
7:3:2:82     Evidence of quantum correction to conductivity in strained epitaxial LaNiO3 films
DOI:10.1063/1.3494091  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Kumar, Yogesh;Choudhary, R. J.;Singh, Abhinav Pratap;Anjum, G.;Kumar, Ravi;
7:3:2:83     e(g)-level splitting in a layered perovskite manganite as revealed by charge modulation spectroscopy
DOI:10.1103/PhysRevB.86.125127  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Nakamura, Masao;Kawasaki, Masashi;Tokura, Yoshinori;
7:3:2:84     Structure, strain, and the ground state of the LaTiO3/LaAlO3 superlattice
DOI:10.1103/PhysRevB.89.115108  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Lee, Alex Taekyung;Han, Myung Joon;
7:3:2:85     DC current induced metal-insulator transition in epitaxial Sm0.6Nd0.4NiO3/LaAlO3 thin film
DOI:10.1063/1.4874642  JN:AIP ADVANCES  PY:2014
  TC:2  AU: Huang, Haoliang;Luo, Zhenlin;Yang, Yuanjun;Yun, Yu;Yang, Mengmeng;Meng, Dechao;Wang, Haibo;Hu, Sixia;Bao, Jun;Lu, Yalin;Gao, Chen;
7:3:2:86     Inductive crystal field control in layered metal oxides with correlated electrons
DOI:10.1063/1.4890544  JN:APL MATERIALS  PY:2014
  TC:5  AU: Balachandran, P. V.;Cammarata, A.;Nelson-Cheeseman, B. B.;Bhattacharya, A.;Rondinelli, J. M.;
7:3:2:87     Revealing the atomic and electronic structure of a SrTiO3/LaNiO3/SrTiO3 heterostructure interface
DOI:10.1063/1.4868513  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhang, Zaoli;Soltan, S.;Schimd, H.;Habermeier, H. -U.;Keimer, B.;Kaiser, U.;
7:3:2:88     Effect of grain boundary on electrical properties of polycrystalline lanthanum nickel oxide thin films
DOI:10.1007/s00339-012-7466-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Zhu, M. W.;Wang, Z. J.;Chen, Y. N.;Wang, H. L.;Zhang, Z. D.;
7:3:2:89     Room temperature Mott metal-insulator transition and its systematic control in Sm1-xCaxNiO3 thin films
DOI:10.1063/1.3467199  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Xiang, P. -H.;Asanuma, S.;Yamada, H.;Inoue, I. H.;Akoh, H.;Sawa, A.;
7:3:2:90     SmNiO3/NdNiO3 thin film multilayers
DOI:10.1063/1.3599580  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Girardot, C.;Pignard, S.;Weiss, F.;Kreisel, J.;
7:3:2:91     Determining ferroelectric polarity at the nanoscale
DOI:10.1063/1.3549300  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: LeBeau, James M.;D'Alfonso, Adrian J.;Wright, Nicholas J.;Allen, Leslie J.;Stemmer, Susanne;
7:3:2:92     Charge ordering at the interface in (LaMnO3)(2n)/(SrMnO3)(n) superlattices as the origin of their insulating state
DOI:10.1063/1.4866271  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Pardo, Victor;Botana, Antia S.;Baldomir, Daniel;
7:3:2:93     Effect of strain on the local perovskite structure: La0.5Sr0.5CoO3
DOI:10.1063/1.3564934  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Woicik, J. C.;Xie, C. K.;Wells, B. O.;
7:3:2:94     Microstructure and transport properties of sol-gel derived highly (100)-oriented lanthanum nickel oxide thin films on SiO2/Si substrate
DOI:10.1016/j.jcrysgro.2011.09.050  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:5  AU: Zhu, M. W.;Wang, Z. J.;Chen, Y. N.;Zhang, Z. D.;
7:3:2:95     Structural and transport properties of epitaxial PrNiO3 thin films grown by molecular beam epitaxy
DOI:10.1016/j.jcrysgro.2012.12.018  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:2  AU: Feigl, L.;Schultz, B. D.;Ohya, S.;Ouellette, D. G.;Kozhanov, A.;Palmstrom, C. J.;
7:3:2:96     High pressure synthesis of SmNiO3 thin films and implications for thermodynamics of the nickelates
DOI:10.1039/c3tc00844d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:8  AU: Jaramillo, R.;Schoofs, Frank;Ha, Sieu D.;Ramanathan, Shriram;
7:3:2:97     Direct Observation of Charge Order in Triangular Metallic AgNiO2 by Single-Crystal Resonant X-Ray Scattering
DOI:10.1103/PhysRevLett.106.157206  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:6  AU: Pascut, G. L.;Coldea, R.;Radaelli, P. G.;Bombardi, A.;Beutier, G.;Mazin, I. I.;Johannes, M. D.;Jansen, M.;
7:3:2:98     Mass enhancement versus Stoner enhancement in strongly correlated metallic perovskites: LaNiO3 and LaCuO3
DOI:10.1103/PhysRevB.89.245138  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Zhou, J. -S.;Marshall, L. G.;Goodenough, J. B.;
7:3:2:99     Strain dependent stabilization of metallic paramagnetic state in epitaxial NdNiO3 thin films
DOI:10.1063/1.4754593  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Kumar, Yogesh;Choudhary, R. J.;Sharma, S. K.;Knobel, M.;Kumar, Ravi;
7:3:2:100     Bandwidth-controlled metal-insulator transition in epitaxial PrNiO3 ultrathin films induced by dimensional crossover
DOI:10.1063/1.4874980  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Sakai, Enju;Yoshimatsu, Kohei;Tamamitsu, Masatomo;Horiba, Koji;Fujimori, Atsushi;Oshima, Masaharu;Kumigashira, Hiroshi;
7:3:2:101     Dynamical Mean-Field Theory of Nickelate Superlattices
DOI:10.1103/PhysRevLett.110.179904  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Han, M. J.;Wang, Xin;Marianetti, C. A.;Millis, A. J.;
7:3:2:102     Spin-canted magnetism and decoupling of charge and spin ordering in NdNiO3
DOI:10.1103/PhysRevB.88.014410  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Kumar, Devendra;Rajeev, K. P.;Alonso, J. A.;Martinez-Lope, M. J.;
7:3:2:103     Controlling the sharpness of room-temperature metal-insulator transition in epitaxial Sm0.5Nd0.5NiO3 films
DOI:10.1063/1.4812716  JN:AIP ADVANCES  PY:2013
  TC:3  AU: Lian, X. K.;Chen, F.;Tan, X. L.;Wang, L. F.;Xuan, X. F.;Gao, G. Y.;Jin, S. W.;Wu, W. B.;
7:3:2:104     Metal-insulator transition upon heating and negative-differential-resistive-switching induced by self-heating in BaCo0.9Ni0.1S1.8
DOI:10.1063/1.4871806  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Fisher, B.;Genossar, J.;Chashka, K. B.;Patlagan, L.;Reisner, G. M.;
7:3:2:105     Strain controlled systematic variation of metal-insulator transition in epitaxial NdNiO3 thin films
DOI:10.1063/1.4758306  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Kumar, Yogesh;Choudhary, R. J.;Kumar, Ravi;
7:3:2:106     Orbital reflectometry of oxide heterostructures
DOI:10.1038/NMAT2958  JN:NATURE MATERIALS  PY:2011
  TC:77  AU: Benckiser, Eva;Haverkort, Maurits W.;Brueck, Sebastian;Goering, Eberhard;Macke, Sebastian;Frano, Alex;Yang, Xiaoping;Andersen, Ole K.;Cristiani, Georg;Habermeier, Hanns-Ulrich;Boris, Alexander V.;Zegkinoglou, Ioannis;Wochner, Peter;Kim, Heon-Jung;Hinkov, Vladimir;Keimer, Bernhard;
7:3:2:107     Exchange bias in LaNiO3-LaMnO3 superlattices
DOI:10.1038/NMAT3224  JN:NATURE MATERIALS  PY:2012
  TC:91  AU: Gibert, Marta;Zubko, Pavlo;Scherwitzl, Raoul;Iniguez, Jorge;Triscone, Jean-Marc;
7:3:2:108     Stability of Ni sites across the pressure-induced insulator-to-metal transition in YNiO3
DOI:10.1103/PhysRevB.85.045102  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Ramos, Aline Y.;Piamonteze, Cinthia;Tolentino, Helio C. N.;Souza-Neto, Narcizo M.;Bunau, Oana;Joly, Yves;Grenier, Stephane;Itie, Jean-Paul;Massa, Nestor E.;Alonso, Jose A.;Martinez-Lope, Maria J.;
7:3:2:109     Charge disproportionation in RNiO3 (R = Tm, Yb) perovskites observed in situ by neutron diffraction and Fe-57 probe Mossbauer spectroscopy
DOI:10.1103/PhysRevB.87.184111  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Alonso, J. A.;Martinez-Lope, M. J.;Presniakov, I. A.;Sobolev, A. V.;Rusakov, V. S.;Gapochka, A. M.;Demazeau, G.;Fernandez-Diaz, M. T.;
7:3:2:110     Irradiation induced modification in transport properties of LaNiO3 thin films: An x-ray absorption study
DOI:10.1063/1.4752005  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Kumar, Yogesh;Singh, Abhinav Pratap;Sharma, S. K.;Choudhary, R. J.;Thakur, P.;Knobel, M.;Brookes, N. B.;Kumar, Ravi;
7:3:2:111     Confinement-induced metal-to-insulator transition in strained LaNiO3/LaAlO3 superlattices (vol 84, 195450, 2011)
DOI:10.1103/PhysRevB.84.239902  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Blanca-Romero, Ariadna;Pentcheva, Rossitza;
7:3:2:112     Unusual temperature dependence of the spectral weight near the Fermi level of NdNiO3 thin films
DOI:10.1103/PhysRevB.86.195147  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;
7:3:2:113     Quantum confinement of Mott electrons in ultrathin LaNiO3/LaAlO3 superlattices (vol 83, 161102, 2011)
DOI:10.1103/PhysRevB.86.079904  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Liu, Jian;Okamoto, S.;van Veenendaal, M.;Kareev, M.;Gray, B.;Ryan, P.;Freeland, J. W.;Chakhalian, J.;
7:3:2:114     Strain-modulated Mott transition in EuNiO3 ultrathin films (vol 88, 075116, 2013)
DOI:10.1103/PhysRevB.88.079903  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Meyers, D.;Middey, S.;Kareev, M.;van Veenendaal, M.;Moon, E. J.;Gray, B. A.;Liu, Jian;Freeland, J. W.;Chakhalian, J.;
7:3:2:115     Effect of structural and magnetic exchange coupling on the electronic transport of NdNiO3 films intercalated with La0.7Sr0.3MnO3 thin layers (vol 103, 032403, 2013)
DOI:10.1063/1.4817531  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Pandey, Parul;Rana, Rakesh;Tripathi, Shivendra;Rana, D. S.;
7:3:2:116     Electrically induced insulator to metal transition in epitaxial SmNiO3 thin films (vol 105, 012108, 2014)
DOI:10.1063/1.4891559  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Shukla, Nikhil;Joshi, Toyanath;Dasgupta, Sandeepan;Borisov, Pavel;Lederman, David;Datta, Suman;
7:3:2:117     Epitaxial stabilization of ultra thin films of electron doped manganites
DOI:10.1063/1.4879456  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Middey, S.;Kareev, M.;Meyers, D.;Liu, X.;Cao, Y.;Tripathi, S.;Yazici, D.;Maple, M. B.;Ryan, P. J.;Freeland, J. W.;Chakhalian, J.;
7:3:3:1     Structure and Properties of Functional Oxide Thin Films: Insights From Electronic-Structure Calculations
DOI:10.1002/adma.201101152  JN:ADVANCED MATERIALS  PY:2011
  TC:100  AU: Rondinelli, James M.;Spaldin, Nicola A.;
7:3:3:2     Quantifying octahedral rotations in strained perovskite oxide films
DOI:10.1103/PhysRevB.82.014110  JN:PHYSICAL REVIEW B  PY:2010
  TC:90  AU: May, S. J.;Kim, J. -W.;Rondinelli, J. M.;Karapetrova, E.;Spaldin, N. A.;Bhattacharya, A.;Ryan, P. J.;
7:3:3:3     Control of octahedral connectivity in perovskite oxide heterostructures: An emerging route to multifunctional materials discovery
DOI:10.1557/mrs.2012.49  JN:MRS BULLETIN  PY:2012
  TC:81  AU: Rondinelli, James M.;May, Steven J.;Freeland, John W.;
7:3:3:4     Suppression of Octahedral Tilts and Associated Changes in Electronic Properties at Epitaxial Oxide Heterostructure Interfaces
DOI:10.1103/PhysRevLett.105.087204  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:89  AU: Borisevich, A. Y.;Chang, H. J.;Huijben, M.;Oxley, M. P.;Okamoto, S.;Niranjan, M. K.;Burton, J. D.;Tsymbal, E. Y.;Chu, Y. H.;Yu, P.;Ramesh, R.;Kalinin, S. V.;Pennycook, S. J.;
7:3:3:5     Misfit strain accommodation in epitaxial ABO(3) perovskites: Lattice rotations and lattice modulations
DOI:10.1103/PhysRevB.83.064101  JN:PHYSICAL REVIEW B  PY:2011
  TC:70  AU: Vailionis, A.;Boschker, H.;Siemons, W.;Houwman, E. P.;Blank, D. H. A.;Rijnders, G.;Koster, G.;
7:3:3:6     Control of Octahedral Tilts and Magnetic Properties of Perovskite Oxide Heterostructures by Substrate Symmetry
DOI:10.1103/PhysRevLett.105.227203  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:48  AU: He, Jun;Borisevich, Albina;Kalinin, Sergei V.;Pennycook, Stephen J.;Pantelides, Sokrates T.;
7:3:3:7     Substrate coherency driven octahedral rotations in perovskite oxide films
DOI:10.1103/PhysRevB.82.113402  JN:PHYSICAL REVIEW B  PY:2010
  TC:36  AU: Rondinelli, James M.;Spaldin, Nicola A.;
7:3:3:8     Control of octahedral rotations in (LaNiO3)(n)/(SrMnO3)(m) superlattices
DOI:10.1103/PhysRevB.83.153411  JN:PHYSICAL REVIEW B  PY:2011
  TC:30  AU: May, S. J.;Smith, C. R.;Kim, J. -W.;Karapetrova, E.;Bhattacharya, A.;Ryan, P. J.;
7:3:3:9     Interplay of Octahedral Tilts and Polar Order in BiFeO3 Films
DOI:10.1002/adma.201204584  JN:ADVANCED MATERIALS  PY:2013
  TC:23  AU: Kim, Young-Min;Kumar, Amit;Hatt, Alison;Morozovska, Anna N.;Tselev, Alexander;Biegalski, Michael D.;Ivanov, Ilya;Eliseev, Eugene A.;Pennycook, Stephen J.;Rondinelli, James M.;Kalinin, Sergei V.;Borisevich, Albina Y.;
7:3:3:10     Octahedral rotations in strained LaAlO3/SrTiO3 (001) heterostructures
DOI:10.1063/1.4865160  JN:APL MATERIALS  PY:2014
  TC:8  AU: Fister, T. T.;Zhou, H.;Luo, Z.;Seo, S. S. A.;Hruszkewycz, S. O.;Proffit, D. L.;Eastman, J. A.;Fuoss, P. H.;Baldo, P. M.;Lee, H. N.;Fong, D. D.;
7:3:3:11     High-Temperature Magnetic Insulating Phase in Ultrathin La0.67Sr0.33MnO3 Films
DOI:10.1103/PhysRevLett.109.157207  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:23  AU: Boschker, Hans;Kautz, Jaap;Houwman, Evert P.;Siemons, Wolter;Blank, Dave H. A.;Huijben, Mark;Koster, Gertjan;Vailionis, Arturas;Rijnders, Guus;
7:3:3:12     Structural phases of strained LaAlO3 driven by octahedral tilt instabilities
DOI:10.1103/PhysRevB.82.195402  JN:PHYSICAL REVIEW B  PY:2010
  TC:26  AU: Hatt, Alison J.;Spaldin, Nicola A.;
7:3:3:13     Annealing assisted substrate coherency and high-temperature antiferromagnetic insulating transition in epitaxial La0.67Ca0.33MnO3/NdGaO3(001) films
DOI:10.1063/1.4804541  JN:AIP ADVANCES  PY:2013
  TC:4  AU: Wang, L. F.;Tan, X. L.;Chen, P. F.;Zhi, B. W.;Chen, B. B.;Huang, Z.;Gao, G. Y.;Wu, W. B.;
7:3:3:14     Misfit accommodation in oxide thin film heterostructures
DOI:10.1016/j.actamat.2012.09.069  JN:ACTA MATERIALIA  PY:2013
  TC:14  AU: Pennycook, S. J.;Zhou, H.;Chisholm, M. F.;Borisevich, A. Y.;Varela, M.;Gazquez, J.;Pennycook, T. J.;Narayan, J.;
7:3:3:15     Control of Structural Distortions in Transition-Metal Oxide Films through Oxygen Displacement at the Heterointerface
DOI:10.1002/adfm.201303521  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:7  AU: Aso, Ryotaro;Kan, Daisuke;Shimakawa, Yuichi;Kurata, Hiroki;
7:3:3:16     Hidden Magnetic Configuration in Epitaxial La1-xSrxMnO3 Films
DOI:10.1103/PhysRevLett.105.257204  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:27  AU: Lee, J. -S.;Arena, D. A.;Yu, P.;Nelson, C. S.;Fan, R.;Kinane, C. J.;Langridge, S.;Rossell, M. D.;Ramesh, R.;Kao, C. -C.;
7:3:3:17     Effect of Interfacial Octahedral Behavior in Ultrathin Manganite Films
DOI:10.1021/nl500235f  JN:NANO LETTERS  PY:2014
  TC:14  AU: Moon, E. J.;Balachandran, P. V.;Kirby, B. J.;Keavney, D. J.;Sichel-Tissot, R. J.;Schlepuetz, C. M.;Karapetrova, E.;Cheng, X. M.;Rondinelli, J. M.;May, S. J.;
7:3:3:18     Thickness-dependent structural phase transition of strained SrRuO3 ultrathin films: The role of octahedral tilt
DOI:10.1103/PhysRevB.84.104101  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Chang, Seo Hyoung;Chang, Young Jun;Jang, S. Y.;Jeong, D. W.;Jung, C. U.;Kim, Y. -J.;Chung, J. -S.;Noh, T. W.;
7:3:3:19     Octahedral tilting in strained LaVO3 thin films
DOI:10.1103/PhysRevB.85.184101  JN:PHYSICAL REVIEW B  PY:2012
  TC:12  AU: Rotella, H.;Lueders, U.;Janolin, P. -E.;Dao, V. H.;Chateigner, D.;Feyerherm, R.;Dudzik, E.;Prellier, W.;
7:3:3:20     Enhancing the orthorhombicity and antiferromagnetic-insulating state in epitaxial La0.67Ca0.33MnO3/NdGaO3(001) films by inserting a SmFeO3 buffer layer
DOI:10.1063/1.4902951  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Tan, Xuelian;Gao, Guanyin;Chen, Pingfan;Xu, Haoran;Zhi, Bowen;Jin, Feng;Chen, Feng;Wu, Wenbin;
7:3:3:21     Large Isosymmetric Reorientation of Oxygen Octahedra Rotation Axes in Epitaxially Strained Perovskites
DOI:10.1103/PhysRevLett.106.235502  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:19  AU: Rondinelli, James M.;Coh, Sinisa;
7:3:3:22     Competing Misfit Relaxation Mechanisms in Epitaxial Correlated Oxides
DOI:10.1103/PhysRevLett.110.107206  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:15  AU: Sandiumenge, Felip;Santiso, Jose;Balcells, Lluis;Konstantinovic, Zorica;Roqueta, Jaume;Pomar, Alberto;Pedro Espinos, Juan;Martinez, Benjamin;
7:3:3:23     Tuning the ground state of La0.67Ca0.33MnO3 films via coherent growth on orthorhombic NdGaO3 substrates with different orientations
DOI:10.1103/PhysRevB.86.014410  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Huang, Z.;Wang, L. F.;Chen, P. F.;Gao, G. Y.;Tan, X. L.;Zhi, B. W.;Xuan, X. F.;Wu, W. B.;
7:3:3:24     Anisotropic resistivities in anisotropic-strain-controlled phase-separated La0.67Ca0.33MnO3/NdGaO3(100) films
DOI:10.1063/1.4818636  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Wang, L. F.;Tan, X. L.;Chen, P. F.;Zhi, B. W.;Sun, Z. G.;Huang, Z.;Gao, G. Y.;Wu, W. B.;
7:3:3:25     Tilt transitions in compressively strained AgTa0.5Nb0.5O3 thin films
DOI:10.1103/PhysRevB.84.134114  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Johnson-Wilke, R. L.;Tinberg, D. S.;Yeager, C. B.;Han, Y.;Reaney, I. M.;Levin, I.;Fong, D. D.;Fister, T. T.;Trolier-McKinstry, S.;
7:3:3:26     Symmetry and lattice mismatch induced strain accommodation near and away from correlated perovskite interfaces
DOI:10.1063/1.4896969  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Vailionis, A.;Boschker, H.;Liao, Z.;Smit, J. R. A.;Rijnders, G.;Huijben, M.;Koster, G.;
7:3:3:27     Unit-cell thick BaTiO3 blocks octahedral tilt propagation across oxide heterointerface
DOI:10.1063/1.4875839  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Kan, Daisuke;Aso, Ryotaro;Kurata, Hiroki;Shimakawa, Yuichi;
7:3:3:28     Ab initio study of the intrinsic exchange bias at the SrRuO3/SrMnO3 interface
DOI:10.1103/PhysRevB.84.224437  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Dong, Shuai;Zhang, Qinfang;Yunoki, Seiji;Liu, J-M;Dagotto, Elbio;
7:3:3:29     Quantification of octahedral rotations in strained LaAlO3 films via synchrotron x-ray diffraction
DOI:10.1103/PhysRevB.88.174101  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Johnson-Wilke, R. L.;Marincel, D.;Zhu, S.;Warusawithana, M. P.;Hatt, A.;Sayre, J.;Delaney, K. T.;Engel-Herbert, R.;Schlepuetz, C. M.;Kim, J. -W.;Gopalan, V.;Spaldin, N. A.;Schlom, D. G.;Ryan, P. J.;Trolier-McKinstry, S.;
7:3:3:30     Thickness-Dependent Structure-Property Relationships in Strained (110) SrRuO3 Thin Films
DOI:10.1002/adfm.201202402  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:16  AU: Kan, Daisuke;Aso, Ryotaro;Kurata, Hiroki;Shimakawa, Yuichi;
7:3:3:31     Iso-Structural Phase Transitions in BiFeO3
DOI:10.1002/adma.200904229  JN:ADVANCED MATERIALS  PY:2010
  TC:22  AU: Scott, James F.;
7:3:3:32     Epitaxial strain effect in tetragonal SrRuO3 thin films
DOI:10.1063/1.4803869  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Kan, Daisuke;Aso, Ryotaro;Kurata, Hiroki;Shimakawa, Yuichi;
7:3:3:33     Strain modulated anisotropic electronic charge transfer in perovskite Pr0.67Sr0.33MnO3 thin films
DOI:10.1103/PhysRevB.89.195140  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Zhang, Bangmin;Sun, Cheng-Jun;Yang, Ping;Lu, Wenlai;Fisher, Brandon L.;Venkatesan, T.;Heald, Steve M.;Chen, Jing-Sheng;Chow, Gan Moog;
7:3:3:34     Phase-Transition Temperatures of Strained Single-Crystal SrRuO3 Thin Films
DOI:10.1002/adma.200902355  JN:ADVANCED MATERIALS  PY:2010
  TC:26  AU: Choi, Kyoung Jin;Baek, Seung Hyub;Jang, Ho Won;Belenky, Land J.;Lyubchenko, M.;Eom, Chang-Beom;
7:3:3:35     Competing strain relaxation mechanisms in epitaxially grown Pr0.48Ca0.52MnO3 on SrTiO3
DOI:10.1063/1.4900817  JN:APL MATERIALS  PY:2014
  TC:1  AU: Herpers, Anja;O'Shea, Kerry J.;MacLaren, Donald A.;Noyong, Michael;Roesgen, Bernd;Simon, Ulrich;Dittmann, Regina;
7:3:3:36     Uniaxial contribution to the magnetic anisotropy of La0.67Sr0.33MnO3 thin films induced by orthorhombic crystal structure
DOI:10.1016/j.jmmm.2011.05.051  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:14  AU: Boschker, Hans;Mathews, Mercy;Brinks, Peter;Houwman, Evert;Vailionis, Arturas;Koster, Gertjan;Blank, Dave H. A.;Rijnders, Guus;
7:3:3:37     Dynamic Evanescent Phonon Coupling Across the La1-xSrxMnO3/SrTiO3 Interface
DOI:10.1103/PhysRevLett.107.105501  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:12  AU: Segal, Y.;Garrity, K. F.;Vaz, C. A. F.;Hoffman, J. D.;Walker, F. J.;Ismail-Beigi, S.;Ahn, C. H.;
7:3:3:38     Magnetic Ordering and Structural Phase Transitions in a Strained Ultrathin SrRuO3/SrTiO3 Superlattice
DOI:10.1103/PhysRevLett.109.157003  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:8  AU: Gu, Mingqiang;Xie, Qiyun;Shen, Xuan;Xie, Rubin;Wang, Jianli;Tang, Gang;Wu, Di;Zhang, G. P.;Wu, X. S.;
7:3:3:39     Effect of "symmetry mismatch" on the domain structure of rhombohedral BiFeO3 thin films
DOI:10.1063/1.4875801  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Chen, Z. H.;Damodaran, A. R.;Xu, R.;Lee, S.;Martin, L. W.;
7:3:3:40     Phase evolution and the multiple metal-insulator transitions in epitaxially shear-strained La0.67Ca0.33MnO3/NdGaO3(001) films
DOI:10.1063/1.3499650  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Huang, Zhen;Wang, Lingfei;Tan, Xuelian;Chen, Pingfan;Gao, Guanyin;Wu, Wenbin;
7:3:3:41     The role of octahedral tilting in the structural phase transition and magnetic anisotropy in SrRuO3 thin film
DOI:10.1063/1.4790699  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Lu, Wenlai;Song, Wen Dong;He, Kaihua;Chai, Jianwei;Sun, Cheng-Jun;Chow, Gan-Moog;Chen, Jing-Sheng;
7:3:3:42     In-plane structural order of domain engineered La0.7Sr0.3MnO3 thin films
DOI:10.1080/14786435.2012.747010  JN:PHILOSOPHICAL MAGAZINE  PY:2013
  TC:2  AU: Boschker, J. E.;Monsen, A. F.;Nord, M.;Mathieu, R.;Grepstad, J. K.;Holmestad, R.;Wahlstrom, E.;Tybell, T.;
7:3:3:43     Geometric-shape-dependent structural transition behavior in (110) SrRuO3 epitaxial thin films
DOI:10.1063/1.4716029  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Kan, Daisuke;Shimakawa, Yuichi;
7:3:3:44     Electron-lattice instabilities suppress cuprate-like electronic structures in SrFeO3/OSrTiO3 superlattices
DOI:10.1103/PhysRevB.81.085109  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Rondinelli, James M.;Spaldin, Nicola A.;
7:3:3:45     Controlling competing interactions at oxide interfaces: Enhanced anisotropy in La0.7Sr0.3MnO3 films via interface engineering
DOI:10.1103/PhysRevB.85.235125  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Lee, J. -S.;Arena, D. A.;Santos, T. S.;Nelson, C. S.;Hyun, S. I.;Shim, J. H.;Kao, C. -C.;
7:3:3:46     Magnetoelastic coupling in La2/3Sr1/3MnO3 thin films on SrTiO3
DOI:10.1103/PhysRevB.84.184412  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Pesquera, D.;Skumryev, V.;Sanchez, F.;Herranz, G.;Fontcuberta, J.;
7:3:3:47     Thickness-dependent ferromagnetic metal to paramagnetic insulator transition in La0.6Sr0.4MnO3 thin films studied by x-ray magnetic circular dichroism
DOI:10.1103/PhysRevB.89.235123  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Shibata, G.;Yoshimatsu, K.;Sakai, E.;Singh, V. R.;Verma, V. K.;Ishigami, K.;Harano, T.;Kadono, T.;Takeda, Y.;Okane, T.;Saitoh, Y.;Yamagami, H.;Sawa, A.;Kumigashira, H.;Oshima, M.;Koide, T.;Fujimori, A.;
7:3:3:48     Effect of oxygen vacancies on the electronic structure and transport properties of SrRuO3 thin films
DOI:10.1063/1.4795011  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Lu, Wenlai;He, Kaihua;Song, Wendong;Sun, Cheng-Jun;Chow, Gan Moog;Chen, Jing-sheng;
7:3:3:49     Control of orbital ordered state in strained Nd0.25Sr1.75MnO4 films
DOI:10.1063/1.3427428  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Takahashi, K. S.;Fujioka, J.;Ida, Y.;Kawasaki, M.;Tokura, Y.;
7:3:3:50     Structural phase transitions in AgTa0.5Nb0.5O3 thin films
DOI:10.1063/1.3447753  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Han, Y.;Reaney, I. M.;Johnson-Wilke, R. L.;Telli, M. B.;Tinberg, D. S.;Levin, I.;Fong, D. D.;Fister, T. T.;Streiffer, S. K.;Trolier-McKinstry, S.;
7:3:3:51     Octahedral tilt transitions in relaxed epitaxial Pb(Zr(1-x)Ti(x))O(3) films
DOI:10.1063/1.3580328  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Tinberg, Daniel S.;Johnson-Wilke, Raegan L.;Fong, Dillon D.;Fister, Timothy T.;Streiffer, Stephen K.;Han, Yisong;Reaney, Ian M.;Trolier-McKinstry, Susan;
7:3:3:52     Coherently strained epitaxial Pb(Zr1-xTix)O-3 thin films
DOI:10.1063/1.4825215  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Johnson-Wilke, Raegan L.;Tinberg, Daniel S.;Yeager, C.;Qu, Weiguo;Fong, Dillon D.;Fister, Timothy T.;Streiffer, Stephen K.;Han, Yisong;Reaney, Ian M.;Trolier-McKinstry, Susan;
7:3:3:53     Low-temperature synthesis of nanosized bismuth ferrite by the soft chemical method
DOI:10.1016/j.ceramint.2012.06.014  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Aguiar, E. C.;Ramirez, M. A.;Moura, F.;Varela, J. A.;Longo, E.;Simoes, A. Z.;
7:3:3:54     Control of octahedral rotations in (LaNiO3)(n)/(SrMnO3)(m) superlattices (vol 83, 153411, 2011)
DOI:10.1103/PhysRevB.85.039905  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: May, S. J.;Smith, C. R.;Kim, J. -W.;Karapetrova, E.;Bhattacharya, A.;Ryan, P. J.;
7:3:3:55     Control of oxygen octahedral rotations and physical properties in SrRuO3 films
DOI:10.1103/PhysRevB.88.214115  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;
7:3:3:56     Magnetic signature of symmetry reduction in epitaxial La0.67Sr0.33MnO3 films
DOI:10.1063/1.3623442  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Barua, Radhika;Lewis, L. H.;Heiman, D.;
7:3:3:57     Rotation-reversal symmetries in crystals and handed structures
DOI:10.1038/NMAT2987  JN:NATURE MATERIALS  PY:2011
  TC:30  AU: Gopalan, Venkatraman;Litvin, Daniel B.;
7:3:4:1     Switchable Induced Polarization in LaAlO3/SrTiO3 Heterostructures
DOI:10.1021/nl3001088  JN:NANO LETTERS  PY:2012
  TC:57  AU: Bark, C. W.;Sharma, P.;Wang, Y.;Baek, S. H.;Lee, S.;Ryu, S.;Folkman, C. M.;Paudel, T. R.;Kumar, A.;Kalinin, S. V.;Sokolov, A.;Tsymbal, E. Y.;Rzchowski, M. S.;Gruverman, A.;Eom, C. B.;
7:3:4:2     Charge Writing at the LaAlO3/SrTiO3 Surface
DOI:10.1021/nl1012695  JN:NANO LETTERS  PY:2010
  TC:60  AU: Xie, Yanwu;Bell, Christopher;Yajima, Takeaki;Hikita, Yasuyuki;Hwang, Harold Y.;
7:3:4:3     Metallic and Insulating Interfaces of Amorphous SrTiO3-Based Oxide Heterostructures
DOI:10.1021/nl201821j  JN:NANO LETTERS  PY:2011
  TC:70  AU: Chen, Yunzhong;Pryds, Nini;Kleibeuker, Josee E.;Koster, Gertjan;Sun, Jirong;Stamate, Eugen;Shen, Baogen;Rijnders, Guus;Linderoth, Soren;
7:3:4:4     "Water-cycle" mechanism for writing and erasing nanostructures at the LaAlO3/SrTiO3 interface
DOI:10.1063/1.3506509  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:44  AU: Bi, Feng;Bogorin, Daniela F.;Cen, Cheng;Bark, Chung Wung;Park, Jae-Wan;Eom, Chang-Beom;Levy, Jeremy;
7:3:4:5     Tuning the two-dimensional electron gas at the LaAlO3/SrTiO3(001) interface by metallic contacts
DOI:10.1103/PhysRevB.85.125404  JN:PHYSICAL REVIEW B  PY:2012
  TC:16  AU: Arras, Remi;Ruiz, Victor G.;Pickett, Warren E.;Pentcheva, Rossitza;
7:3:4:6     Gate-Controlled Spin Injection at LaAlO3/SrTiO3 Interfaces
DOI:10.1103/PhysRevLett.108.186802  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:21  AU: Reyren, N.;Bibes, M.;Lesne, E.;George, J. -M.;Deranlot, C.;Collin, S.;Barthelemy, A.;Jaffres, H.;
7:3:4:7     Creation and Control of Two-Dimensional Electron Gas Using Al-Based Amorphous Oxides/SrTiO3 Heterostructures Grown by Atomic Layer Deposition
DOI:10.1021/nl302214x  JN:NANO LETTERS  PY:2012
  TC:26  AU: Lee, Sang Woon;Liu, Yiqun;Heo, Jaeyeong;Gordon, Roy G.;
7:3:4:8     Tuning the Electron Gas at an Oxide Heterointerface via Free Surface Charges
DOI:10.1002/adma.201004673  JN:ADVANCED MATERIALS  PY:2011
  TC:28  AU: Xie, Yanwu;Bell, Christopher;Hikita, Yasuyuki;Hwang, Harold Y.;
7:3:4:9     Direct imaging of LaAlO3/SrTiO3 nanostructures using piezoresponse force microscopy
DOI:10.1063/1.4831855  JN:APL MATERIALS  PY:2013
  TC:5  AU: Huang, Mengchen;Bi, Feng;Ryu, Sangwoo;Eom, Chang-Beom;Irvin, Patrick;Levy, Jeremy;
7:3:4:10     Palladium Nanoparticle Enhanced Giant Photoresponse at LaAl3/SrTiO3 Two-Dimensional Electron Gas Heterostructures
DOI:10.1021/nn4029184  JN:ACS NANO  PY:2013
  TC:14  AU: Chan, Ngai Yui;Zhao, Meng;Wang, Ning;Au, Kit;Wang, Juan;Chan, Lai Wa Helen;Dai, Jiyan;
7:3:4:11     Highly Sensitive Gas Sensor by the LaAlO3/SrTiO3 Heterostructure with Pd Nanoparticle Surface Modulation
DOI:10.1002/adma.201401597  JN:ADVANCED MATERIALS  PY:2014
  TC:3  AU: Chan, Ngai Yui;Zhao, Meng;Huang, JianXing;Au, Kit;Wong, Man Hon;Yao, Hei Man;Lu, Wei;Chen, Yan;Ong, Chung Wo;Chan, Helen Lai Wa;Dai, Jiyan;
7:3:4:12     Polar Liquid Molecule Induced Transport Property Modulation at LaAlO3/SrTiO3 Heterointerface
DOI:10.1002/adma.201200673  JN:ADVANCED MATERIALS  PY:2012
  TC:17  AU: Au, K.;Li, D. F.;Chan, N. Y.;Dai, J. Y.;
7:3:4:13     Nonvolatile Resistance Switching on Two-Dimensional Electron Gas
DOI:10.1021/am504354c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:0  AU: Joung, Jin Gwan;Kim, Shin-Ik;Moon, Seon Young;Kim, Dai-Hong;Gwon, Hyo Jin;Hong, Seong-Hyeon;Chang, Hye Jung;Hwang, Jin-Ha;Kwon, Beom Jin;Kim, Seong Keun;Choi, Ji-Won;Yoon, Seok-Jin;Kang, Chong-Yun;Yoo, Kwang Soo;Kim, Jin-Sang;Baek, Seung-Hyub;
7:3:4:14     Room Temperature Formation of High-Mobility Two-Dimensional Electron Gases at Crystalline Complex Oxide Interfaces
DOI:10.1002/adma.201304634  JN:ADVANCED MATERIALS  PY:2014
  TC:6  AU: Chen, Y. Z.;Bovet, N.;Kasama, T.;Gao, W. W.;Yazdi, S.;Ma, C.;Pryds, N.;Linderoth, S.;
7:3:4:15     Resistance switching at the interface of LaAlO3/SrTiO3
DOI:10.1063/1.3490646  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Chen, Y. Z.;Zhao, J. L.;Sun, J. R.;Pryds, N.;Shen, B. G.;
7:3:4:16     Influence of Gas Ambient on Charge Writing at the LaAlO3/SrTiO3 Heterointerface
DOI:10.1021/am503367f  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Kim, Haeri;Moon, Seon Young;Kim, Shin-Ik;Baek, Seung-Hyub;Jang, Ho Won;Kim, Dong-Wook;
7:3:4:17     Mechanical Tuning of LaAlO3/SrTiO3 Interface Conductivity
DOI:10.1021/acs.nanolett.5b01021  JN:NANO LETTERS  PY:2015
  TC:0  AU: Sharma, P.;Ryu, S.;Burton, J. D.;Paudel, T. R.;Bark, C. W.;Huang, Z.;Ariando;Tsymbal, E. Y.;Catalan, G.;Eom, C. B.;Gruverman, A.;
7:3:4:18     Controlling interfacial states in amorphous/crystalline LaAlO3/SrTiO3 heterostructures by electric fields
DOI:10.1063/1.4775669  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Christensen, D. V.;Trier, F.;Chen, Y. Z.;Smith, A.;Nygard, J.;Pryds, N.;
7:3:4:19     Enhancing Electron Mobility at the LaAlO3/SrTiO3 Interface by Surface Control
DOI:10.1002/adma.201301798  JN:ADVANCED MATERIALS  PY:2013
  TC:15  AU: Xie, Yanwu;Bell, Christopher;Hikita, Yasuyuki;Harashima, Satoshi;Hwang, Harold Y.;
7:3:4:20     Non-Volatile Control of 2DEG Conductivity at Oxide Interfaces
DOI:10.1002/adma.201301097  JN:ADVANCED MATERIALS  PY:2013
  TC:10  AU: Kim, Shin-Ik;Kim, Dai-Hong;Kim, Yoonjung;Moon, Seon Young;Kang, Min-Gyu;Choi, Jong Kwon;Jang, Ho Won;Kim, Seong Keun;Choi, Ji-Won;Yoon, Seok-Jin;Chang, Hye Jung;Kang, Chong-Yun;Lee, Suyoun;Hong, Seong-Hyeon;Kim, Jin-Sang;Baek, Seung-Hyub;
7:3:4:21     Metallic conductance at the interface of tri-color titanate superlattices
DOI:10.1063/1.4841955  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Kareev, M.;Cao, Yanwei;Liu, Xiaoran;Middey, S.;Meyers, D.;Chakhalian, J.;
7:3:4:22     Non-local piezoresponse of LaAlO3/SrTiO3 heterostructures
DOI:10.1063/1.4873125  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Huang, Mengchen;Bi, Feng;Bark, Chung-Wung;Ryu, Sangwoo;Cho, Kwang-Hwan;Eom, Chang-Beom;Levy, Jeremy;
7:3:4:23     Creation of High Mobility Two-Dimensional Electron Gases via Strain Induced Polarization at an Otherwise Nonpolar Complex Oxide Interface
DOI:10.1021/nl504622w  JN:NANO LETTERS  PY:2015
  TC:1  AU: Chen, Yunzhong;Trier, Felix;Kasama, Takeshi;Christensen, Dennis V.;Bovet, Nicolas;Balogh, Zoltan I.;Li, Han;Thyden, Karl Tor Sune;Zhang, Wei;Yazdi, Sadegh;Norby, Poul;Pryds, Nini;Linderoth, Soren;
7:3:4:24     Controlling the conductivity of amorphous LaAlO3/SrTiO3 interfaces by in-situ application of an electric field during fabrication
DOI:10.1063/1.4815989  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Trier, F.;Amoruso, S.;Christensen, D. V.;Sambri, A.;Chen, Y. Z.;Wang, X.;Stamate, E.;Bruzzese, R.;Pryds, N.;
7:3:4:25     Electrically induced colossal capacitance enhancement in LaAlO3/SrTiO3 heterostructures
DOI:10.1038/am.2013.48  JN:NPG ASIA MATERIALS  PY:2013
  TC:2  AU: Wu, Shuxiang;Wu, Guangheng;Qing, Jian;Zhou, Xiang;Bao, Dinghua;Yang, Guowei;Li, Shuwei;
7:3:4:26     Ferroelectric Control of the Conduction at the LaAlO3/SrTiO3 Heterointerface
DOI:10.1002/adma.201300757  JN:ADVANCED MATERIALS  PY:2013
  TC:14  AU: Vu Thanh Tra;Chen, Jhih-Wei;Huang, Po-Cheng;Huang, Bo-Chao;Cao, Ye;Yeh, Chao-Hui;Liu, Heng-Jui;Eliseev, Eugene A.;Morozovska, Anna N.;Lin, Jiunn-Yuan;Chen, Yi-Chun;Chu, Ming-Wen;Chiu, Po-Wen;Chiu, Ya-Ping;Chen, Long-Qing;Wu, Chung-Lin;Chu, Ying-Hao;
7:3:4:27     Nanoscale rectification at the LaAlO3/SrTiO3 interface
DOI:10.1063/1.3459138  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Bogorin, Daniela F.;Bark, Chung Wung;Jang, Ho Won;Cen, Cheng;Folkman, Chad M.;Eom, Chang-Beom;Levy, Jeremy;
7:3:4:28     Electromechanical response of amorphous LaAlO3 thin film probed by scanning probe microscopies
DOI:10.1063/1.4889853  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Borowiak, Alexis S.;Baboux, Nicolas;Albertini, David;Vilquin, Bertrand;Saint Girons, Guillaume;Pelloquin, Sylvain;Gautier, Brice;
7:3:4:29     Writing charge into the n-type LaAlO3/SrTiO3 interface: A theoretical study of the H2O kinetics on the top AlO2 surface
DOI:10.1063/1.4772499  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Li, Feifei;Liang, Meng;Du, Wenli;Wang, Mei;Feng, Yexin;Hu, Zhenpeng;Zhang, Lixin;Wang, E. G.;
7:3:4:30     Visible light illumination-induced phase transition to the intermediate states between the metallic and insulating states for the LaAlO3/SrTiO3 interfaces
DOI:10.1063/1.4904460  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Lei, Y.;Sun, J. R.;
7:3:4:31     Ferroelectric-like response from the surface of SrTiO3 crystals at high temperatures
DOI:10.1063/1.4895484  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Jyotsna, Shubhra;Arora, Ashima;Sekhon, Jagmeet S.;Sheet, Goutam;
7:3:4:32     Degradation of the interfacial conductivity in LaAlO3/SrTiO3 heterostructures during storage at controlled environments
DOI:10.1016/j.ssi.2012.08.005  JN:SOLID STATE IONICS  PY:2013
  TC:7  AU: Trier, F.;Christensen, D. V.;Chen, Y. Z.;Smith, A.;Andersen, M. I.;Pryds, N.;
7:3:4:33     Controlling the density of the two-dimensional electron gas at the SrTiO3/LaAlO3 interface
DOI:10.1103/PhysRevB.86.241108  JN:PHYSICAL REVIEW B  PY:2012
  TC:12  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;
7:3:4:34     Plasma plume effects on the conductivity of amorphous-LaAlO3/SrTiO3 interfaces grown by pulsed laser deposition in O-2 and Ar
DOI:10.1063/1.4727905  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Sambri, A.;Cristensen, D. V.;Trier, F.;Chen, Y. Z.;Amoruso, S.;Pryds, N.;Bruzzese, R.;Wang, X.;
7:3:4:35     Nano-patterning of the electron gas at the LaAlO3/SrTiO3 interface using low-energy ion beam irradiation
DOI:10.1063/1.4807785  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Aurino, Pier Paolo;Kalabukhov, Alexey;Tuzla, Nikolina;Olsson, Eva;Claeson, Tord;Winkler, Dag;
7:3:4:36     Gigahertz-frequency operation of a LaAlO3/SrTiO3-based nanotransistor
DOI:10.1063/1.4795725  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Irvin, P.;Huang, M.;Wong, F. J.;Sanders, T. D.;Suzuki, Y.;Levy, J.;
7:3:4:37     Electronic Reconstruction at the Isopolar LaTiO3/LaFeO3 Interface: An X-Ray Photoemission and Density-Functional Theory Study
DOI:10.1103/PhysRevLett.113.237402  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Kleibeuker, J. E.;Zhong, Z.;Nishikawa, H.;Gabel, J.;Mueller, A.;Pfaff, F.;Sing, M.;Held, K.;Claessen, R.;Koster, G.;Rijnders, G.;
7:3:4:38     Capacitance-voltage analysis of LaAlO3/SrTiO3 heterostructures
DOI:10.1063/1.4798334  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Kim, Seong Keun;Kim, Shin-Ik;Hwang, Jin-Ha;Kim, Jin-Sang;Baek, Seung-Hyub;
7:3:4:39     Tunable conductivity at LaAlO3/SrxCa1-xTiO3 (0 <= x <= 1) heterointerfaces
DOI:10.1063/1.4773986  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Moon, Seon Young;Kim, Dai-Hong;Chang, Hye Jung;Choi, Jong Kwon;Kang, Chong-Yun;Choi, Heon Jin;Hong, Seong-Hyeon;Baek, Seung-Hyub;Kim, Jin-Sang;Jang, Ho Won;
7:3:4:40     Tunable atomic force microscopy bias lithography on electron beam induced carbonaceous platforms
DOI:10.1063/1.4821271  JN:AIP ADVANCES  PY:2013
  TC:2  AU: Kurra, Narendra;
7:3:4:41     Broadband Terahertz Generation and Detection at 10 nm Scale
DOI:10.1021/nl401219v  JN:NANO LETTERS  PY:2013
  TC:9  AU: Ma, Yanjun;Huang, Mengchen;Ryu, Sangwoo;Bark, Chung Wung;Eom, Chang-Beom;Irvin, Patrick;Levy, Jeremy;
7:3:4:42     Thermal activation and quantum field emission in a sketch-based oxide nanotransistor
DOI:10.1088/0957-4484/21/47/475201  JN:NANOTECHNOLOGY  PY:2010
  TC:4  AU: Cen, Cheng;Bogorin, Daniela F.;Levy, Jeremy;
7:3:4:43     Grain boundary barrier modification due to coupling effect of crystal polar field and water molecular dipole in ZnO-based structures
DOI:10.1063/1.4884942  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ji, Xu;Zhu, Yuan;Chen, Mingming;Su, Longxing;Chen, Anqi;Zhao, Chengchun;Gui, Xuchun;Xiang, Rong;Huang, Feng;Tang, Zikang;
7:3:4:44     'Water-cycle' mechanism for writing and erasing nanostructures at the LaAlO3/SrTiO3 interface (vol 97, 173110, 2010)
DOI:10.1063/1.4712046  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Bi, Feng;Bogorin, Daniela F.;Cen, Cheng;Bark, Chung Wung;Park, Jae-Wan;Eom, Chang-Beom;Levy, Jeremy;
7:3:5:1     Crystalline Oxides on Silicon
DOI:10.1002/adma.200904306  JN:ADVANCED MATERIALS  PY:2010
  TC:81  AU: Reiner, James W.;Kolpak, Alexie M.;Segal, Yaron;Garrity, Kevin F.;Ismail-Beigi, Sohrab;Ahn, Charles H.;Walker, Fred J.;
7:3:5:2     Interface-Induced Polarization and Inhibition of Ferroelectricity in Epitaxial SrTiO3/Si
DOI:10.1103/PhysRevLett.105.217601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:23  AU: Kolpak, A. M.;Walker, F. J.;Reiner, J. W.;Segal, Y.;Su, D.;Sawicki, M. S.;Broadbridge, C. C.;Zhang, Z.;Zhu, Y.;Ahn, C. H.;Ismail-Beigi, S.;
7:3:5:3     Band alignment and electronic structure of the anatase TiO2/SrTiO3(001) heterostructure integrated on Si(001)
DOI:10.1103/PhysRevB.86.075301  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Seo, Hosung;Posadas, Agham B.;Mitra, Chandrima;Kvit, Alexander V.;Ramdani, Jamal;Demkov, Alexander A.;
7:3:5:4     Epitaxial integration of ferromagnetic correlated oxide LaCoO3 with Si (100)
DOI:10.1063/1.3549301  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:26  AU: Posadas, A.;Berg, M.;Seo, H.;de Lozanne, A.;Demkov, A. A.;Smith, D. J.;Kirk, A. P.;Zhernokletov, D.;Wallace, R. M.;
7:3:5:5     Strain relaxation in single crystal SrTiO3 grown on Si (001) by molecular beam epitaxy
DOI:10.1063/1.3695998  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:18  AU: Choi, Miri;Posadas, Agham;Dargis, Rytis;Shih, Chih-Kang;Demkov, Alexander A.;Triyoso, Dina H.;Theodore, N. David;Dubourdieu, Catherine;Bruley, John;Jordan-Sweet, Jean;
7:3:5:6     Structural study and ferroelectricity of epitaxial BaTiO3 films on silicon grown by molecular beam epitaxy
DOI:10.1063/1.4902165  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Mazet, L.;Bachelet, R.;Louahadj, L.;Albertini, D.;Gautier, B.;Cours, R.;Schamm-Chardon, S.;Saint-Girons, G.;Dubourdieu, C.;
7:3:5:7     Epitaxial integration of perovskite-based multifunctional oxides on silicon
DOI:10.1016/j.actamat.2012.09.073  JN:ACTA MATERIALIA  PY:2013
  TC:13  AU: Baek, Seung-Hyub;Eom, Chang-Beom;
7:3:5:8     Incorporation of La in epitaxial SrTiO3 thin films grown by atomic layer deposition on SrTiO3-buffered Si (001) substrates
DOI:10.1063/1.4883767  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: McDaniel, Martin D.;Posadas, Agham;Ngo, Thong Q.;Karako, Christine M.;Bruley, John;Frank, Martin M.;Narayanan, Vijay;Demkov, Alexander A.;Ekerdt, John G.;
7:3:5:9     Growth and characterization of epitaxial anatase TiO2(001) on SrTiO3-buffered Si(001) using atomic layer deposition
DOI:10.1016/j.tsf.2012.06.061  JN:THIN SOLID FILMS  PY:2012
  TC:14  AU: McDaniel, M. D.;Posadas, A.;Wang, T.;Demkov, A. A.;Ekerdt, J. G.;
7:3:5:10     The atomic structure and polarization of strained SrTiO3/Si
DOI:10.1063/1.3529460  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Kumah, D. P.;Reiner, J. W.;Segal, Y.;Kolpak, A. M.;Zhang, Z.;Su, D.;Zhu, Y.;Sawicki, M. S.;Broadbridge, C. C.;Ahn, C. H.;Walker, F. J.;
7:3:5:11     Epitaxial strontium titanate films grown by atomic layer deposition on SrTiO3-buffered Si(001) substrates
DOI:10.1116/1.4770291  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2013
  TC:10  AU: McDaniel, Martin D.;Posadas, Agham;Ngo, Thong Q.;Dhamdhere, Ajit;Smith, David J.;Demkov, Alexander A.;Ekerdt, John G.;
7:3:5:12     Combined in-situ photoemission spectroscopy and density functional theory of the Sr Zintl template for oxide heteroepitaxy on Si(001)
DOI:10.1116/1.4807716  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:0  AU: Seo, Hosung;Choi, Miri;Posadas, Agham B.;Hatch, Richard C.;Demkov, Alexander A.;
7:3:5:13     Atomic and electronic structure of the ferroelectric BaTiO3/Ge(001) interface
DOI:10.1063/1.4883883  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Fredrickson, Kurt D.;Ponath, Patrick;Posadas, Agham B.;McCartney, Martha R.;Aoki, Toshihiro;Smith, David J.;Demkov, Alexander A.;
7:3:5:14     Ultra-flat BaTiO3 epitaxial films on Si(001) with large out-of-plane polarization
DOI:10.1063/1.4798246  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Scigaj, M.;Dix, N.;Fina, I.;Bachelet, R.;Warot-Fonrose, B.;Fontcuberta, J.;Sanchez, F.;
7:3:5:15     Charge transfer in Sr Zintl template on Si(001)
DOI:10.1063/1.4788916  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Choi, Miri;Posadas, Agham B.;Seo, Hosung;Hatch, Richard C.;Demkov, Alexander A.;
7:3:5:16     Atomic layer deposition of photoactive CoO/SrTiO3 and CoO/TiO2 on Si(001) for visible light driven photoelectrochemical water oxidation
DOI:10.1063/1.4819106  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Ngo, Thong Q.;Posadas, Agham;Seo, Hosung;Hoang, Son;McDaniel, Martin D.;Utess, Dirk;Triyoso, Dina H.;Mullins, C. Buddie;Demkov, Alexander A.;Ekerdt, John G.;
7:3:5:17     Enhanced critical temperature in epitaxial ferroelectric Pb(Zr0.2Ti0.8)O-3 thin films on silicon
DOI:10.1063/1.3532110  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Sambri, A.;Gariglio, S.;Torres-Pardo, A.;Triscone, J. -M.;Stephan, O.;Reiner, J. W.;Ahn, C. H.;
7:3:5:18     Epitaxial c-axis oriented BaTiO3 thin films on SrTiO3-buffered Si(001) by atomic layer deposition
DOI:10.1063/1.4867469  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Ngo, Thong Q.;Posadas, Agham B.;McDaniel, Martin D.;Hu, Chengqing;Bruley, John;Yu, Edward T.;Demkov, Alexander A.;Ekerdt, John G.;
7:3:5:19     Thermodynamic stability and growth kinetics of epitaxial SrTiO3 on silicon
DOI:10.1103/PhysRevB.83.165318  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Kolpak, A. M.;Ismail-Beigi, S.;
7:3:5:20     Interface structure and film polarization in epitaxial SrTiO3/Si(001)
DOI:10.1103/PhysRevB.85.195318  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Kolpak, A. M.;Ismail-Beigi, S.;
7:3:5:21     Critical differences in the surface electronic structure of Ge(001) and Si(001): Ab initio theory and angle-resolved photoemission spectroscopy
DOI:10.1103/PhysRevB.89.115318  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Seo, Hosung;Hatch, Richard C.;Ponath, Patrick;Choi, Miri;Posadas, Agham B.;Demkov, Alexander A.;
7:3:5:22     CoFe2O4/buffer layer ultrathin heterostructures on Si(001)
DOI:10.1063/1.3651386  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Bachelet, R.;de Coux, P.;Warot-Fonrose, B.;Skumryev, V.;Fontcuberta, J.;Sanchez, F.;
7:3:5:23     Epitaxial growth of LaAlO3 on SrTiO3-buffered Si (001) substrates by atomic layer deposition
DOI:10.1016/j.jcrysgro.2012.10.032  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:8  AU: Ngo, Thong Q.;Posadas, Agham;McDaniel, Martin D.;Ferrer, Domingo A.;Bruley, John;Breslin, Chris;Demkov, Alexander A.;Ekerdt, John G.;
7:3:5:24     Structure of SrTiO3 Films on Si
DOI:10.1103/PhysRevLett.108.166101  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:5  AU: Hellberg, C. Stephen;Andersen, Kristopher E.;Li, Hao;Ryan, P. J.;Woicik, J. C.;
7:3:5:25     Formation and atomic structure of ordered Sr-induced nanostrips on Ge(100)
DOI:10.1103/PhysRevB.89.155319  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Lukanov, Boris R.;Garrity, Kevin F.;Ismail-Beigi, Sohrab;Altman, Eric I.;
7:3:5:26     Piezoelectric force microscopy of crystalline oxide-semiconductor heterostructures
DOI:10.1063/1.4750243  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Marshall, M. S. J.;Kumah, D. P.;Reiner, J. W.;Baddorf, A. P.;Ahn, C. H.;Walker, F. J.;
7:3:5:27     Ferroelectric Pb(Zr,Ti)O-3 epitaxial layers on GaAs
DOI:10.1063/1.4831738  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Louahadj, L.;Le Bourdais, D.;Largeau, L.;Agnus, G.;Mazet, L.;Bachelet, R.;Regreny, P.;Albertini, D.;Pillard, V.;Dubourdieu, C.;Gautier, B.;Lecoeur, P.;Saint-Girons, G.;
7:3:5:28     Epitaxial ferromagnetic oxide thin films on silicon with atomically sharp interfaces
DOI:10.1063/1.4887349  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: de Coux, P.;Bachelet, R.;Warot-Fonrose, B.;Skumryev, V.;Lupina, L.;Niu, G.;Schroeder, T.;Fontcuberta, J.;Sanchez, F.;
7:3:5:29     Ferroelectric functionality in SrTiO3/Si heterojunctions
DOI:10.1063/1.4828887  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Yu, H. L.;Wu, Y. Z.;Jiang, X. F.;Cai, M. Q.;Gu, L. P.;Yang, G. W.;
7:3:5:30     Growth and interfacial properties of epitaxial oxides on semiconductors: ab initio insights
DOI:10.1007/s10853-012-6425-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:4  AU: Garrity, Kevin F.;Kolpak, Alexie M.;Ismail-Beigi, Sohrab;
7:3:5:31     Deciphering the atomic structure of a complex Sr/Ge (100) phase via scanning tunneling microscopy and first-principles calculations
DOI:10.1103/PhysRevB.85.195316  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Lukanov, Boris;Garrity, Kevin;Ismail-Beigi, Sohrab;Altman, Eric I.;
7:3:5:32     Using Zintl-Klemm intermetallics in oxide-semiconductor heteroepitaxy
DOI:10.1063/1.3685508  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Demkov, A. A.;Seo, H.;Zhang, X.;Ramdani, J.;
7:3:5:33     Growth of epitaxial oxides on silicon using atomic layer deposition: Crystallization and annealing of TiO2 on SrTiO3-buffered Si(001)
DOI:10.1116/1.4734311  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2012
  TC:6  AU: McDaniel, Martin D.;Posadas, Agham;Ngo, Thong Q.;Dhamdhere, Ajit;Smith, David J.;Demkov, Alexander A.;Ekerdt, John G.;
7:3:5:34     First-principles study of Zintl aluminide SrAl2
DOI:10.1103/PhysRevB.85.195462  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Slepko, Alexander;Demkov, Alexander A.;
7:3:5:35     Pulsed laser deposition of SrTiO3 on a H-terminated Si substrate
DOI:10.1039/c3tc30913d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:7  AU: Spreitzer, Matjaz;Egoavil, Ricardo;Verbeeck, Jo;Blank, Dave H. A.;Rijnders, Guus;
7:3:5:36     Controlling tetragonality and crystalline orientation in BaTiO3 nano-layers grown on Si
DOI:10.1088/0957-4484/24/28/285701  JN:NANOTECHNOLOGY  PY:2013
  TC:11  AU: Abel, S.;Sousa, M.;Rossel, C.;Caimi, D.;Rossell, M. D.;Erni, R.;Fompeyrine, J.;Marchiori, C.;
7:3:5:37     Prediction of stable ferroelectricity in epitaxial BaTiO3 on Si
DOI:10.1063/1.4751848  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Yu, H. L.;Zhang, H. B.;Jiang, X. F.;Yang, G. W.;
7:3:5:38     Fabrication of Sr silicate buffer layer on Si(100) substrate by pulsed laser deposition using a SrO target
DOI:10.1116/1.4886972  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2014
  TC:1  AU: Imanaka, Atsuhiro;Sasaki, Tsubasa;Hotta, Yasushi;Satoh, Shin-ichi;
7:3:5:39     Formation of alkaline-earth template layers on Ge(100) for oxide heteroepitaxy: Self-organization of ordered islands and trenches
DOI:10.1103/PhysRevB.84.075330  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Lukanov, B. R.;Reiner, J. W.;Walker, F. J.;Ahn, C. H.;Altman, E. I.;
7:3:5:40     Epitaxial Zintl aluminide SrAl4 grown on a LaAlO3 substrate
DOI:10.1103/PhysRevB.88.045314  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Schlipf, Lukas;Slepko, Alexander;Posadas, Agham B.;Seinige, Heidi;Dhamdhere, Ajit;Tsoi, Maxim;Smith, David J.;Demkov, Alexander A.;
7:3:5:41     Electrochemical Monitoring of TiO2 Atomic Layer Deposition by Chronoamperometry and Scanning Electrochemical Microscopy
DOI:10.1021/cm401635v  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:6  AU: Satpati, Ashis K.;Arroyo-Curras, Netzahualcoyotl;Ji, Li;Yu, Edward T.;Bard, Allen J.;
7:3:5:42     Dependence of silicon oxidation channel on distribution of surface electrons at initial stage of oxide growth on Si(001)
DOI:10.1063/1.4825366  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Han, Han;Che, J. G.;
7:3:5:43     Atomic structure of Sr-induced reconstructions on the Si(100) surface
DOI:10.1063/1.3554829  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: He, Jiehui;Zhang, Guanhua;Guo, Jiandong;Guo, Qinlin;Wu, Kehui;
7:3:5:44     Formation of single-orientation epitaxial islands of TiSi(2) on Si(001) using Sr passivation
DOI:10.1116/1.3579598  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:1  AU: Posadas, A.;Dargis, R.;Choi, M. R.;Slepko, A.;Demkov, A. A.;Kim, J. J.;Smith, D. J.;
7:3:5:45     Impact of thermal treatment upon morphology and crystallinity of strontium titanate films deposited by atomic layer deposition
DOI:10.1116/1.3534018  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:4  AU: Popovici, Mihaela;Van Elshocht, Sven;Menou, Nicolas;Favia, Paola;Bender, Hugo;Rosseel, Erik;Swerts, Johan;Adelmann, Christoph;Vrancken, Christa;Moussa, Alain;Tielens, Hilde;Tomida, Kazuyuki;Pawlak, Malgorzata;Kaczer, Ben;Schoofs, Geert;Vandervorst, Wilfried;Wouters, Dirk J.;Kittl, Jorge A.;
7:3:5:46     Preparation of a clean Ge(001) surface using oxygen plasma cleaning
DOI:10.1116/1.4798390  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:12  AU: Ponath, Patrick;Posadas, Agham B.;Hatch, Richard C.;Demkov, Alexander A.;
7:3:5:47     Ferroelectricity in strained Ca0.5Sr0.5TiO3 from first principles
DOI:10.1103/PhysRevB.82.024112  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Ashman, Christopher R.;Hellberg, C. Stephen;Halilov, Samed;
7:3:5:48     Valence electron energy-loss spectroscopy of ultrathin SrTiO3 films grown on silicon (100) single crystal
DOI:10.1063/1.3364144  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Su, Dong;Yang, Bo;Jiang, Nan;Sawicki, M.;Broadbridge, C.;Couillard, M.;Reiner, J. W.;Walker, F. J.;Ahn, C. H.;Zhu, Yimei;
7:3:5:49     Orientation control of epitaxial Ge thin films growth on SrTiO3 (100) by ultrahigh vacuum sputtering
DOI:10.1016/j.tsf.2012.03.037  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Deng, Wensheng;Yang, Ming;Chai, Jianwei;Wong, Ten It;Du, Anyan;Ng, Chee Mang;Feng, Yuanping;Wang, Shijie;
7:3:6:1     Enhancing the electron mobility of SrTiO3 with strain
DOI:10.1063/1.3571447  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:31  AU: Jalan, Bharat;Allen, S. James;Beltz, Glenn E.;Moetakef, Pouya;Stemmer, Susanne;
7:3:6:2     Electronic transport in doped SrTiO3: Conduction mechanisms and potential applications
DOI:10.1103/PhysRevB.81.155110  JN:PHYSICAL REVIEW B  PY:2010
  TC:30  AU: Spinelli, A.;Torija, M. A.;Liu, C.;Jan, C.;Leighton, C.;
7:3:6:3     Structure and correlation effects in semiconducting SrTiO3
DOI:10.1103/PhysRevB.81.235109  JN:PHYSICAL REVIEW B  PY:2010
  TC:27  AU: Chang, Young Jun;Bostwick, Aaron;Kim, Yong Su;Horn, Karsten;Rotenberg, Eli;
7:3:6:4     Large Seebeck coefficients and thermoelectric power factor of La-doped SrTiO3 thin films
DOI:10.1063/1.3471398  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:32  AU: Jalan, Bharat;Stemmer, Susanne;
7:3:6:5     Density functional theory and experimental study of the electronic structure and transport properties of La, V, Nb, and Ta doped SrTiO3
DOI:10.1063/1.4770360  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Baniecki, J. D.;Ishii, M.;Aso, H.;Kurihara, K.;Ricinschi, Dan;
7:3:6:6     Modeling of the cubic and antiferrodistortive phases of SrTiO3 with screened hybrid density functional theory
DOI:10.1103/PhysRevB.84.115122  JN:PHYSICAL REVIEW B  PY:2011
  TC:19  AU: El-Mellouhi, Fedwa;Brothers, Edward N.;Lucero, Melissa J.;Scuseria, Gustavo E.;
7:3:6:7     Structural phase transitions of the metal oxide perovskites SrTiO3, LaAlO3, and LaTiO3 studied with a screened hybrid functional
DOI:10.1103/PhysRevB.87.035107  JN:PHYSICAL REVIEW B  PY:2013
  TC:9  AU: El-Mellouhi, Fedwa;Brothers, Edward N.;Lucero, Melissa J.;Bulik, Ireneusz W.;Scuseria, Gustavo E.;
7:3:6:8     Enhancing the electron mobility via delta-doping in SrTiO3
DOI:10.1063/1.3524198  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:22  AU: Kozuka, Y.;Kim, M.;Ohta, H.;Hikita, Y.;Bell, C.;Hwang, H. Y.;
7:3:6:9     Strain effects on the electronic structure of SrTiO3: Toward high electron mobilities
DOI:10.1103/PhysRevB.84.201304  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Janotti, A.;Steiauf, D.;Van de Walle, C. G.;
7:3:6:10     Dimensional crossover of polaron dynamics in Nb:SrTiO3/SrTiO3 superlattices: Possible mechanism of thermopower enhancement
DOI:10.1103/PhysRevB.82.024301  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Choi, Woo Seok;Ohta, Hiromichi;Moon, Soon Jae;Lee, Yun Sang;Noh, Tae Won;
7:3:6:11     Structural, optical, and electrical properties of strained La-doped SrTiO3 films
DOI:10.1063/1.4891225  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:7  AU: Choi, Miri;Posadas, Agham B.;Rodriguez, Cesar A.;O'Hara, Andrew;Seinige, Heidi;Kellock, Andrew J.;Frank, Martin M.;Tsoi, Maxim;Zollner, Stefan;Narayanan, Vijay;Demkov, Alexander A.;
7:3:6:12     Electronic structure of delta-doped La:SrTiO3 layers by hard x-ray photoelectron spectroscopy
DOI:10.1063/1.4731642  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Kaiser, A. M.;Gray, A. X.;Conti, G.;Jalan, B.;Kajdos, A. P.;Gloskovskii, A.;Ueda, S.;Yamashita, Y.;Kobayashi, K.;Drube, W.;Stemmer, S.;Fadley, C. S.;
7:3:6:13     Seebeck effect in the conducting LaAlO3/SrTiO3 interface
DOI:10.1103/PhysRevB.81.085414  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Pallecchi, I.;Codda, M.;d'Agliano, E. Galleani;Marre, D.;Caviglia, A. D.;Reyren, N.;Gariglio, S.;Triscone, J. -M.;
7:3:6:14     Observation of Electrically-Inactive Interstitials in Nb-Doped SrTiO3
DOI:10.1021/nn401101y  JN:ACS NANO  PY:2013
  TC:5  AU: Jeong, Jong Seok;Ambwani, Palak;Jalan, Bharat;Leighton, Chris;Mkhoyan, K. Andre;
7:3:6:15     Electronic transport behavior of off-stoichiometric La and Nb doped SrxTiyO3-delta epitaxial thin films and donor doped single-crystalline SrTiO3
DOI:10.1063/1.3664397  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Baniecki, J. D.;Ishii, M.;Aso, H.;Kobayashi, K.;Kurihara, K.;Yamanaka, K.;Vailionis, A.;Schafranek, R.;
7:3:6:16     Thermopower in quantum confined La-doped SrTiO3 epitaxial heterostructures
DOI:10.1063/1.4826098  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Kerman, K.;Ramanathan, S.;Baniecki, J. D.;Ishii, M.;Kotaka, Y.;Aso, H.;Kurihara, K.;Schafranek, R.;Vailionis, A.;
7:3:6:17     Tunable two-dimensional or three-dimensional electron gases by submonolayer La doping of SrTiO3
DOI:10.1103/PhysRevB.83.193106  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Ong, P. V.;Lee, Jaichan;Pickett, Warren E.;
7:3:6:18     Doping-induced dimensional crossover and thermopower burst in Nb-doped SrTiO3 superlattices
DOI:10.1103/PhysRevB.88.045310  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Delugas, P.;Filippetti, A.;Verstraete, M. J.;Pallecchi, I.;Marre, D.;Fiorentini, V.;
7:3:6:19     Uniaxial strain induced band splitting in semiconducting SrTiO3
DOI:10.1103/PhysRevB.87.115212  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Chang, Young Jun;Khalsa, Guru;Moreschini, Luca;Walter, Andrew L.;Bostwick, Aaron;Horn, Karsten;MacDonald, A. H.;Rotenberg, Eli;
7:3:6:20     Thermopower Enhancement by Fractional Layer Control in 2D Oxide Superlattices
DOI:10.1002/adma.201401676  JN:ADVANCED MATERIALS  PY:2014
  TC:1  AU: Choi, Woo Seok;Ohta, Hiromichi;Lee, Ho Nyung;
7:3:6:21     Effect of oxygen vacancy distribution on the thermoelectric properties of La-doped SrTiO3 epitaxial thin films
DOI:10.1063/1.4767840  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Kumar, S. R. Sarath;Abutaha, A. I.;Hedhili, M. N.;Alshareef, H. N.;
7:3:6:22     Epitaxial Cr on n-SrTiO3(001)-An ideal Ohmic contact
DOI:10.1063/1.3680608  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Capan, C.;Sun, G. Y.;Bowden, M. E.;Chambers, S. A.;
7:3:6:23     Atomic and electronic surface structures of dopants in oxides: STM and XPS of Nb- and La-doped SrTiO3(001)
DOI:10.1103/PhysRevB.83.035410  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Marshall, Matthew S. J.;Newell, David T.;Payne, David J.;Egdell, Russell G.;Castell, Martin R.;
7:3:6:24     La-doped SrTiO3 films with large cryogenic thermoelectric power factors
DOI:10.1063/1.4804182  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Cain, Tyler A.;Kajdos, Adam P.;Stemmer, Susanne;
7:3:6:25     La doped SrTiO3 thin films on SrLaAlO4 (001) as transparent conductor
DOI:10.1063/1.4804664  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Biswas, A.;Li, N.;Jung, M. H.;Lee, Y. W.;Kim, J. S.;Jeong, Y. H.;
7:3:6:26     Intrinsic Mobility Limiting Mechanisms in Lanthanum-Doped Strontium Titanate
DOI:10.1103/PhysRevLett.112.216601  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:1  AU: Verma, Amit;Kajdos, Adam P.;Cain, Tyler A.;Stemmer, Susanne;Jena, Debdeep;
7:3:6:27     Tuning the electronic effective mass in double-doped SrTiO3
DOI:10.1103/PhysRevB.83.035101  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Ravichandran, J.;Siemons, W.;Scullin, M. L.;Mukerjee, S.;Huijben, M.;Moore, J. E.;Majumdar, A.;Ramesh, R.;
7:3:6:28     Ultralow Contact Resistance at an Epitaxial Metal/Oxide Heterojunction Through Interstitial Site Doping
DOI:10.1002/adma.201301030  JN:ADVANCED MATERIALS  PY:2013
  TC:3  AU: Chambers, Scott A.;Gu, Meng;Sushko, Peter V.;Yang, Hao;Wang, Chongmin;Browning, Nigel D.;
7:3:6:29     First-principles modeling of the thermoelectric properties of SrTiO3/SrRuO3 superlattices
DOI:10.1103/PhysRevB.86.085305  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Garcia-Fernandez, Pablo;Verissimo-Alves, Marcos;Bilc, Daniel I.;Ghosez, Philippe;Junquera, Javier;
7:3:6:30     Effects of doping on the lattice parameter of SrTiO3
DOI:10.1063/1.4730998  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Janotti, Anderson;Jalan, Bharat;Stemmer, Susanne;Van de Walle, Chris G.;
7:3:6:31     High Temperature Thermoelectric Properties of Strontium Titanate Thin Films with Oxygen Vacancy and Niobium Doping
DOI:10.1021/am4015956  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:8  AU: Kumar, S. R. Sarath;Barasheed, Abeer Z.;Alshareef, H. N.;
7:3:6:32     An Epitaxial Transparent Conducting Perovskite Oxide: Double-Doped SrTiO3
DOI:10.1021/cm1005604  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:13  AU: Ravichandran, Jayakanth;Siemons, Wolter;Heijmerikx, Herman;Huijben, Mark;Majumdar, Arun;Ramesh, Ramamoorthy;
7:3:6:33     Thermoelectric Properties of Strontium Titanate Superlattices Incorporating Niobium Oxide Nanolayers
DOI:10.1021/cm500646f  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:3  AU: Kumar, S. R. Sarath;Hedhili, M. N.;Cha, Dongkyu;Tritt, Terry M.;Alshareef, H. N.;
7:3:6:34     Critical Doping for the Onset of a Two-Band Superconducting Ground State in SrTiO3-delta
DOI:10.1103/PhysRevLett.112.207002  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:1  AU: Lin, Xiao;Bridoux, German;Gourgout, Adrien;Seyfarth, Gabriel;Kraemer, Steffen;Nardone, Marc;Fauque, Benoit;Behnia, Kamran;
7:3:6:35     Giant thermopower and figure of merit of semiconducting polaronic nanolayers
DOI:10.1103/PhysRevB.81.153204  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Alexandrov, A. S.;Bratkovsky, A. M.;
7:3:6:36     Density functional theory and experimental study of the electronic structure and transport properties of La, V, Nb, and Ta doped SrTiO3 (vol 113, 013701, 2013)
DOI:10.1063/1.4789781  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Baniecki, J. D.;Ishii, M.;Aso, H.;Kurihara, K.;Ricinschi, Dan;
7:3:6:37     Modeling of the cubic and antiferrodistortive phases of SrTiO3 with screened hybrid density functional theory (vol 84, 115122, 2011)
DOI:10.1103/PhysRevB.84.199907  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: El-Mellouhi, Fedwa;Brothers, Edward N.;Lucero, Melissa J.;Scuseria, Gustavo E.;
7:3:7:1     Interface Ferromagnetism and Orbital Reconstruction in BiFeO3-La0.7Sr0.3MnO3 Heterostructures
DOI:10.1103/PhysRevLett.105.027201  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:121  AU: Yu, P.;Lee, J. -S.;Okamoto, S.;Rossell, M. D.;Huijben, M.;Yang, C. -H.;He, Q.;Zhang, J. X.;Yang, S. Y.;Lee, M. J.;Ramasse, Q. M.;Erni, R.;Chu, Y. -H.;Arena, D. A.;Kao, C. -C.;Martin, L. W.;Ramesh, R.;
7:3:7:2     Full Electric Control of Exchange Bias
DOI:10.1103/PhysRevLett.110.067202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:41  AU: Wu, S. M.;Cybart, Shane A.;Yi, D.;Parker, James M.;Ramesh, R.;Dynes, R. C.;
7:3:7:3     Electronic and Magnetic Reconstructions in La0.7Sr0.3MnO3/SrTiO3 Heterostructures: A Case of Enhanced Interlayer Coupling Controlled by the Interface
DOI:10.1103/PhysRevLett.106.147205  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:23  AU: Bruno, F. Y.;Garcia-Barriocanal, J.;Varela, M.;Nemes, N. M.;Thakur, P.;Cezar, J. C.;Brookes, N. B.;Rivera-Calzada, A.;Garcia-Hernandez, M.;Leon, C.;Okamoto, S.;Pennycook, S. J.;Santamaria, J.;
7:3:7:4     Room Temperature Electrical Manipulation of Giant Magnetoresistance in Spin Valves Exchange-Biased with BiFeO3
DOI:10.1021/nl202537y  JN:NANO LETTERS  PY:2012
  TC:47  AU: Allibe, Julie;Fusil, Stephane;Bouzehouane, Karim;Daumont, Christophe;Sando, Daniel;Jacquet, Eric;Deranlot, Cyrille;Bibes, Manuel;Barthelemy, Agnes;
7:3:7:5     Magnetoelectric coupling at the interface of BiFeO3/La0.7Sr0.3MnO3 multilayers
DOI:10.1103/PhysRevB.84.024422  JN:PHYSICAL REVIEW B  PY:2011
  TC:18  AU: Calderon, M. J.;Liang, S.;Yu, R.;Salafranca, J.;Dong, S.;Yunoki, S.;Brey, L.;Moreo, A.;Dagotto, E.;
7:3:7:6     Uniaxial Magnetic Anisotropy in La0.7Sr0.3MnO3 Thin Films Induced by Multiferroic BiFeO3 with Striped Ferroelectric Domains
DOI:10.1002/adma.201001990  JN:ADVANCED MATERIALS  PY:2010
  TC:19  AU: You, Lu;Lu, Chengliang;Yang, Pan;Han, Guchang;Wu, Tom;Luders, Ulrike;Prellier, Wilfrid;Yao, Kui;Chen, Lang;Wang, Junling;
7:3:7:7     Magnetic interaction at an interface between manganite and other transition metal oxides
DOI:10.1103/PhysRevB.82.024427  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Okamoto, Satoshi;
7:3:7:8     Effect of magnetic field on ferroelectric properties of BiFeO3/La5/8Ca3/8MnO3 epitaxial heterostructures
DOI:10.1103/PhysRevB.86.075113  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Liu, Yukuai;Yao, Yiping;Dong, Sining;Yang, Shengwei;Li, Xiaoguang;
7:3:7:9     Signatures of a Two-Dimensional Ferromagnetic Electron Gas at the La0.7Sr0.3MnO3/SrTiO3 Interface Arising From Orbital Reconstruction
DOI:10.1002/adma.201402829  JN:ADVANCED MATERIALS  PY:2014
  TC:1  AU: Marcel Nemes, Norbert;Jose Calderon, Maria;Ignacio Beltran, Juan;Yair Bruno, Flavio;Garcia-Barriocanal, Javier;Sefrioui, Zouhair;Leon, Carlos;Garcia-Hernandez, Mar;Carmen Munoz, Maria;Brey, Luis;Santamaria, Jacobo;
7:3:7:10     Exchange coupling with the multiferroic compound BiFeO3 in antiferromagnetic multidomain films and single-domain crystals
DOI:10.1103/PhysRevB.81.134411  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Lebeugle, D.;Mougin, A.;Viret, M.;Colson, D.;Allibe, J.;Bea, H.;Jacquet, E.;Deranlot, C.;Bibes, M.;Barthelemy, A.;
7:3:7:11     Exchange-bias effect at La0.75Sr0.25MnO3/LaNiO3 interfaces
DOI:10.1103/PhysRevB.85.094427  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Rojas Sanchez, J. C.;Nelson-Cheeseman, B.;Granada, M.;Arenholz, E.;Steren, L. B.;
7:3:7:12     Ultrathin Limit of Exchange Bias Coupling at Oxide Multiferroic/Ferromagnetic Interfaces
DOI:10.1002/adma.201300940  JN:ADVANCED MATERIALS  PY:2013
  TC:11  AU: Huijben, M.;Yu, P.;Martin, L. W.;Molegraaf, H. J. A.;Chu, Y. -H.;Holcomb, M. B.;Balke, N.;Rijnders, G.;Ramesh, R.;
7:3:7:13     Effects of magnetic electrode on the ferroelectric properties in heteroepitaxial BiFeO3/La0.625Ca0.375MnO3 thin films
DOI:10.1063/1.4867396  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Feng, L.;Yang, S. W.;Liu, Y. K.;Yin, Y. W.;Dong, S. N.;Jiang, T.;Li, X. G.;Zeng, Z.;
7:3:7:14     Exchange bias effect in epitaxial La0.67Ca0.33MnO3/SrMnO3 thin film structure
DOI:10.1063/1.4894281  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yu, T.;Ning, X. K.;Liu, W.;Feng, J. N.;Zhao, X. G.;Zhang, Z. D.;
7:3:7:15     Giant magnetodielectric effect in Terfenol-D/PZT magnetoelectric laminate composite
DOI:10.1063/1.3603042  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Yao, Y. P.;Hou, Y.;Dong, S. N.;Li, X. G.;
7:3:7:16     Observation of intriguing exchange bias in BiFeO3 thin films
DOI:10.1063/1.4745887  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Sung, K. D.;Park, Y. A.;Seo, M. S.;Jo, Y.;Nur, N.;Jung, J. H.;
7:3:7:17     Tunable dielectric and ferroelectric properties in heteroepitaxial PbZr0.52Ti0.48O3/La0.625Ca0.375MnO3 thin films
DOI:10.1063/1.4813510  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Yang, Shengwei;Dong, Sining;Liu, Yukuai;Yao, Yiping;Yin, Yuewei;Li, Xiaoguang;
7:3:7:18     Tuning the Competition between Ferromagnetism and Antiferromagnetism in a Half-Doped Manganite through Magnetoelectric Coupling
DOI:10.1103/PhysRevLett.111.127601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Yi, Di;Liu, Jian;Okamoto, Satoshi;Jagannatha, Suresha;Chen, Yi-Chun;Yu, Pu;Chu, Ying-Hao;Arenholz, Elke;Ramesh, R.;
7:3:7:19     All-Manganite Tunnel Junctions with Interface-Induced Barrier Magnetism
DOI:10.1002/adma.201002067  JN:ADVANCED MATERIALS  PY:2010
  TC:15  AU: Sefrioui, Z.;Visani, C.;Calderon, M. J.;March, K.;Carretero, C.;Walls, M.;Rivera-Calzada, A.;Leon, C.;Anton, R. Lopez;Charlton, T. R.;Cuellar, F. A.;Iborra, E.;Ott, F.;Imhoff, D.;Brey, L.;Bibes, M.;Santamaria, J.;Barthelemy, A.;
7:3:7:20     Photo-carrier control of exchange bias in BiFeO3/La2/3Sr1/3MnO3 thin films
DOI:10.1063/1.4885335  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Sung, K. D.;Lee, T. K.;Park, Y. A.;Hur, N.;Jung, J. H.;
7:3:7:21     Exchange bias in La(0.7S)r(0.3)MnO(3)/NiO and LaMnO3/NiO interfaces
DOI:10.1063/1.4811227  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Ning, X. K.;Wang, Z. J.;Zhao, X. G.;Shih, C. W.;Zhang, Z. D.;
7:3:7:22     Interface Magnetism in Epitaxial BiFeO3-La0.7Sr0.3MnO3 Heterostructures Integrated on Si(100)
DOI:10.1021/nl4023435  JN:NANO LETTERS  PY:2013
  TC:16  AU: Rao, S. S.;Prater, J. T.;Wu, Fan;Shelton, C. T.;Maria, J. -P.;Narayan, J.;
7:3:7:23     Electric-field-controlled antiferromagnetic domains in epitaxial BiFeO3 thin films probed by neutron diffraction
DOI:10.1103/PhysRevB.87.140405  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Ratcliff, W., II;Yamani, Zahra;Anbusathaiah, V.;Gao, T. R.;Kienzle, P. A.;Cao, H.;Takeuchi, I.;
7:3:7:24     Induced Magnetization in La0.7Sr0.3MnO3/BiFeO3 Superlattices
DOI:10.1103/PhysRevLett.113.047204  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Singh, Surendra;Haraldsen, J. T.;Xiong, J.;Choi, E. M.;Lu, P.;Yi, D.;Wen, X. -D.;Liu, J.;Wang, H.;Bi, Z.;Yu, P.;Fitzsimmons, M. R.;MacManus-Driscoll, J. L.;Ramesh, R.;Balatsky, A. V.;Zhu, Jian-Xin;Jia, Q. X.;
7:3:7:25     Uncompensated spins in exchange-biased BiFeO3/gamma-Fe2O3 core/shell-like thin films
DOI:10.1063/1.4821029  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Sung, K. D.;Park, Y. A.;Kim, Ki-Yeon;Hur, N.;Jung, J. H.;
7:3:7:26     Colossal magnetocapacitance effect in BiFeO3/La5/8Ca3/8MnO3 epitaxial films
DOI:10.1016/j.tsf.2012.04.074  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Liu, Yukuai;Yao, Yiping;Dong, Sining;Jiang, Tao;Yang, Shengwei;Li, Xiaoguang;
7:3:7:27     Deconvoluting reversal modes in exchange-biased nanodots
DOI:10.1103/PhysRevB.86.144410  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Dumas, Randy K.;Li, Chang-Peng;Roshchin, Igor V.;Schuller, Ivan K.;Liu, Kai;
7:3:7:28     Dynamic magnetic interaction in La2/3Sr1/3MnO3/BiFeO3 heterostructure
DOI:10.1063/1.4896030  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Guo, H. Y.;Lin, J. G.;Yang, Jan Chi;Chu, Y. H.;
7:3:7:29     Interface-induced room-temperature multiferroicity in BaTiO3
DOI:10.1038/NMAT3098  JN:NATURE MATERIALS  PY:2011
  TC:138  AU: Valencia, S.;Crassous, A.;Bocher, L.;Garcia, V.;Moya, X.;Cherifi, R. O.;Deranlot, C.;Bouzehouane, K.;Fusil, S.;Zobelli, A.;Gloter, A.;Mathur, N. D.;Gaupp, A.;Abrudan, R.;Radu, F.;Barthelemy, A.;Bibes, M.;
7:3:7:30     Magnetodielectric Effect and Tunable Dielectric Properties of LaMn(1-x)Fe(x)O(3)
DOI:10.1111/j.1551-2916.2010.03939.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Dong, Sining;Hou, Ying;Yao, Yiping;Yin, Yuewei;Ding, Dong;Yu, Qingxuan;Li, Xiaoguang;
7:3:7:31     Element-specific depth profile of magnetism and stoichiometry at the La0.67Sr0.33MnO3/BiFeO3 interface
DOI:10.1103/PhysRevB.90.041113  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Bertinshaw, J.;Brueck, S.;Lott, D.;Fritzsche, H.;Khaydukov, Y.;Soltwedel, O.;Keller, T.;Goering, E.;Audehm, P.;Cortie, D. L.;Hutchison, W. D.;Ramasse, Q. M.;Arredondo, M.;Maran, R.;Nagarajan, V.;Klose, F.;Ulrich, C.;
7:3:7:32     Room-Temperature Ferroelectric Resistive Switching in Ultrathin Pb(Zr0.2Ti0.8)O-3 Films (vol 5, pg 6032, 2011)
DOI:10.1021/nn202547g  JN:ACS NANO  PY:2011
  TC:1  AU: Pantel, Daniel;Goetze, Silvana;Hesse, Dietrich;Alexe, Marin;
7:3:7:33     Magnetoelectric effect and critical thickness for ferroelectricity in Co/BaTiO3/Co multiferroic tunnel junctions
DOI:10.1063/1.3587172  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Cao, Dan;Cai, Meng-Qiu;Hu, Wang Yu;Xu, Chun-Mei;
7:3:7:34     Reversible electric control of exchange bias in a multiferroic field-effect device
DOI:10.1038/NMAT2803  JN:NATURE MATERIALS  PY:2010
  TC:220  AU: Wu, S. M.;Cybart, Shane A.;Yu, P.;Rossell, M. D.;Zhang, J. X.;Ramesh, R.;Dynes, R. C.;
7:3:8:1     Surface defects and conduction in polar oxide heterostructures
DOI:10.1103/PhysRevB.83.205405  JN:PHYSICAL REVIEW B  PY:2011
  TC:51  AU: Bristowe, N. C.;Littlewood, P. B.;Artacho, Emilio;
7:3:8:2     Polarity-induced oxygen vacancies at LaAlO3/SrTiO3 interfaces
DOI:10.1103/PhysRevB.82.165127  JN:PHYSICAL REVIEW B  PY:2010
  TC:37  AU: Zhong, Zhicheng;Xu, P. X.;Kelly, Paul J.;
7:3:8:3     Direct k-Space Mapping of the Electronic Structure in an Oxide-Oxide Interface
DOI:10.1103/PhysRevLett.110.247601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:23  AU: Berner, G.;Sing, M.;Fujiwara, H.;Yasui, A.;Saitoh, Y.;Yamasaki, A.;Nishitani, Y.;Sekiyama, A.;Pavlenko, N.;Kopp, T.;Richter, C.;Mannhart, J.;Suga, S.;Claessen, R.;
7:3:8:4     Localized and delocalized Ti 3d carriers in LaAlO3/SrTiO3 superlattices revealed by resonant inelastic x-ray scattering
DOI:10.1103/PhysRevB.83.201402  JN:PHYSICAL REVIEW B  PY:2011
  TC:24  AU: Zhou, Ke-Jin;Radovic, Milan;Schlappa, Justine;Strocov, Vladimir;Frison, Ruggero;Mesot, Joel;Patthey, Luc;Schmitt, Thorsten;
7:3:8:5     Band alignment in LaAlO3/SrTiO3 oxide heterostructures inferred from hard x-ray photoelectron spectroscopy
DOI:10.1103/PhysRevB.88.115111  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Berner, G.;Mueller, A.;Pfaff, F.;Walde, J.;Richter, C.;Mannhart, J.;Thiess, S.;Gloskovskii, A.;Drube, W.;Sing, M.;Claessen, R.;
7:3:8:6     Hard x-ray photoemission and density functional theory study of the internal electric field in SrTiO3/LaAlO3 oxide heterostructures
DOI:10.1103/PhysRevB.87.085128  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Slooten, E.;Zhong, Zhicheng;Molegraaf, H. J. A.;Eerkes, P. D.;de Jong, S.;Massee, F.;van Heumen, E.;Kruize, M. K.;Wenderich, S.;Kleibeuker, J. E.;Gorgoi, M.;Hilgenkamp, H.;Brinkman, A.;Huijben, M.;Rijnders, G.;Blank, D. H. A.;Koster, G.;Kelly, P. J.;Golden, M. S.;
7:3:8:7     Polar-discontinuity-retaining A-site intermixing and vacancies at SrTiO3/LaAlO3 interfaces
DOI:10.1103/PhysRevB.85.045401  JN:PHYSICAL REVIEW B  PY:2012
  TC:17  AU: Vonk, V.;Huijben, J.;Kukuruznyak, D.;Stierle, A.;Hilgenkamp, H.;Brinkman, A.;Harkema, S.;
7:3:8:8     Intrinsic origin of interface states and band-offset profiling of nanostructured LaAlO3/SrTiO3 heterojunctions probed by element-specific resonant spectroscopies
DOI:10.1103/PhysRevB.90.035124  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Drera, G.;Salvinelli, G.;Bondino, F.;Magnano, E.;Huijben, M.;Brinkman, A.;Sangaletti, L.;
7:3:8:9     Electronic charges and electric potential at LaAlO3/SrTiO3 interfaces studied by core-level photoemission spectroscopy
DOI:10.1103/PhysRevB.84.245124  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Takizawa, M.;Tsuda, S.;Susaki, T.;Hwang, H. Y.;Fujimori, A.;
7:3:8:10     In-gap electronic structure of LaAlO3-SrTiO3 heterointerfaces investigated by soft x-ray spectroscopy
DOI:10.1103/PhysRevB.84.245121  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Koitzsch, A.;Ocker, J.;Knupfer, M.;Dekker, M. C.;Doerr, K.;Buechner, B.;Hoffmann, P.;
7:3:8:11     Doping-dependent band structure of LaAlO3/SrTiO3 interfaces by soft x-ray polarization-controlled resonant angle-resolved photoemission
DOI:10.1103/PhysRevB.89.121412  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Cancellieri, C.;Reinle-Schmitt, M. L.;Kobayashi, M.;Strocov, V. N.;Willmott, P. R.;Fontaine, D.;Ghosez, Ph;Filippetti, A.;Delugas, P.;Fiorentini, V.;
7:3:8:12     Spectroscopic evidence of in-gap states at the SrTiO3/LaAlO3 ultrathin interfaces
DOI:10.1063/1.3549177  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Drera, G.;Banfi, F.;Canova, F. Federici;Borghetti, P.;Sangaletti, L.;Bondino, F.;Magnano, E.;Huijben, J.;Huijben, M.;Rijnders, G.;Blank, D. H. A.;Hilgenkamp, H.;Brinkman, A.;
7:3:8:13     Origin of insulating behavior of the p-type LaAlO3/SrTiO3 interface: Polarization-induced asymmetric distribution of oxygen vacancies
DOI:10.1103/PhysRevB.82.125412  JN:PHYSICAL REVIEW B  PY:2010
  TC:19  AU: Zhang, Lixin;Zhou, Xiang-Feng;Wang, Hui-Tian;Xu, Jing-Jun;Li, Jingbo;Wang, E. G.;Wei, Su-Huai;
7:3:8:14     Formation of oxygen vacancies and charge carriers induced in the n-type interface of a LaAlO3 overlayer on SrTiO3(001)
DOI:10.1103/PhysRevB.84.245307  JN:PHYSICAL REVIEW B  PY:2011
  TC:18  AU: Li, Yun;Phattalung, Sutassana Na;Limpijumnong, Sukit;Kim, Jiyeon;Yu, Jaejun;
7:3:8:15     Electronic charge redistribution in LaAlO3(001) thin films deposited at SrTiO3(001) substrate: First-principles analysis and the role of stoichiometry
DOI:10.1103/PhysRevB.86.155410  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Sorokine, Alexandre;Bocharov, Dmitry;Piskunov, Sergei;Kashcheyevs, Vyacheslavs;
7:3:8:16     Mapping Band Alignment across Complex Oxide Heterointerfaces
DOI:10.1103/PhysRevLett.109.246807  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:17  AU: Huang, Bo-Chao;Chiu, Ya-Ping;Huang, Po-Cheng;Wang, Wen-Ching;Vu Thanh Tra;Yang, Jan-Chi;He, Qing;Lin, Jiunn-Yuan;Chang, Chia-Seng;Chu, Ying-Hao;
7:3:8:17     Proposal of a One-Dimensional Electron Gas in the Steps at the LaAlO3-SrTiO3 Interface
DOI:10.1103/PhysRevLett.108.166802  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:9  AU: Bristowe, N. C.;Fix, T.;Blamire, M. G.;Littlewood, P. B.;Artacho, Emilio;
7:3:8:18     Interface Fermi States of LaAlO3/SrTiO3 and Related Heterostructures
DOI:10.1103/PhysRevLett.110.137601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:8  AU: Cancellieri, C.;Reinle-Schmitt, M. L.;Kobayashi, M.;Strocov, V. N.;Schmitt, T.;Willmott, P. R.;Gariglio, S.;Triscone, J. -M.;
7:3:8:19     Band offsets and density of Ti3+ states probed by x-ray photoemission on LaAlO3/SrTiO3 heterointerfaces and their LaAlO3 and SrTiO3 bulk precursors
DOI:10.1103/PhysRevB.87.075435  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Drera, G.;Salvinelli, G.;Brinkman, A.;Huijben, M.;Koster, G.;Hilgenkamp, H.;Rijnders, G.;Visentin, D.;Sangaletti, L.;
7:3:8:20     Observation of strontium segregation in LaAlO3/SrTiO3 and NdGaO3/SrTiO3 oxide heterostructures by X-ray photoemission spectroscopy
DOI:10.1063/1.4861797  JN:APL MATERIALS  PY:2014
  TC:2  AU: Treske, Uwe;Heming, Nadine;Knupfer, Martin;Buechner, Bernd;Koitzsch, Andreas;Di Gennaro, Emiliano;di Uccio, Umberto Scotti;Granozio, Fabio Miletto;Krause, Stefan;
7:3:8:21     Polarization discontinuity induced two-dimensional electron gas at ZnO/Zn(Mg)O interfaces: A first-principles study
DOI:10.1103/PhysRevB.88.085418  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Betancourt, J.;Saavedra-Arias, J. J.;Burton, J. D.;Ishikawa, Y.;Tsymbal, E. Y.;Velev, J. P.;
7:3:8:22     LaAlO3/SrTiO3 oxide heterostructures studied by resonant inelastic x-ray scattering
DOI:10.1103/PhysRevB.82.241405  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Berner, G.;Glawion, S.;Walde, J.;Pfaff, F.;Hollmark, H.;Duda, L. -C.;Paetel, S.;Richter, C.;Mannhart, J.;Sing, M.;Claessen, R.;
7:3:8:23     High tunability of the work function of (001) surface of ReO3 with O-vacancies: First principles analysis
DOI:10.1063/1.4887521  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Suchitra;Pan, Jaysree;Waghmare, Umesh V.;
7:3:8:24     Layer-by-Layer Evolution of a Two-Dimensional Electron Gas Near an Oxide Interface
DOI:10.1103/PhysRevLett.111.126401  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Chang, Young Jun;Moreschini, Luca;Bostwick, Aaron;Gaines, Geoffrey A.;Kim, Yong Su;Walter, Andrew L.;Freelon, Byron;Tebano, Antonello;Horn, Karsten;Rotenberg, Eli;
7:3:8:25     Orbital-selective charge transfer at oxygen-deficient LaAlO3/SrTiO3(001) interfaces
DOI:10.1103/PhysRevB.87.195212  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Ong, P. V.;Lee, Jaichan;
7:3:8:26     Tuning the carrier density of LaAlO3/SrTiO3 interfaces by capping La1-xSrxMnO3
DOI:10.1063/1.4793576  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Shi, Y. J.;Wang, S.;Zhou, Y.;Ding, H. F.;Wu, D.;
7:3:8:27     Polarization screening and induced carrier density at the interface of LaAlO3 overlayer on SrTiO3 (001)
DOI:10.1063/1.3455877  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Li, Yun;Yu, Jaejun;
7:3:8:28     Digging up bulk band dispersion buried under a passivation layer
DOI:10.1063/1.4770289  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Kobayashi, Masaki;Muneta, Iriya;Schmitt, Thorsten;Patthey, Luc;Ohya, Sinobu;Tanaka, Masaaki;Oshima, Masaharu;Strocov, Vladimir N.;
7:3:8:29     Ferroelectric modulation on resonant tunneling through perovskite double-barriers
DOI:10.1063/1.4871277  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Du, Ruifang;Qiu, Xiangbiao;Li, Aidong;Wu, Di;
7:3:8:30     Distribution of electronic reconstruction at the n-type LaAlO3/SrTiO3 interface revealed by hard x-ray photoemission spectroscopy
DOI:10.1063/1.3672099  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Chu, Y. Y.;Liao, Y. F.;Tra, V. T.;Yang, J. C.;Liu, W. Z.;Chu, Y. H.;Lin, J. Y.;Huang, J. H.;Weinen, J.;Agrestini, S.;Tsuei, K. -D.;Huang, D. J.;
7:3:8:31     Influence of SrTiO3 substrate miscut angle on the transport properties of LaAlO3/SrTiO3 interfaces
DOI:10.1063/1.3609785  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Fix, T.;Schoofs, F.;Bi, Z.;Chen, A.;Wang, H.;MacManus-Driscoll, J. L.;Blamire, M. G.;
7:3:9:1     Lattice distortion effects on topological phases in (LaNiO3)(2)/(LaAlO3)(N) heterostructures grown along the [111] direction
DOI:10.1103/PhysRevB.88.115146  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Rueegg, Andreas;Mitra, Chandrima;Demkov, Alexander A.;Fiete, Gregory A.;
7:3:9:2     Whither the oxide interface
DOI:10.1038/nmat3225  JN:NATURE MATERIALS  PY:2012
  TC:82  AU: Chakhalian, J.;Millis, A. J.;Rondinelli, J.;
7:3:9:3     Topological insulators from complex orbital order in transition-metal oxides heterostructures
DOI:10.1103/PhysRevB.84.201103  JN:PHYSICAL REVIEW B  PY:2011
  TC:42  AU: Rueegg, Andreas;Fiete, Gregory A.;
7:3:9:4     Possible interaction-driven topological phases in (111) bilayers of LaNiO3
DOI:10.1103/PhysRevB.84.201104  JN:PHYSICAL REVIEW B  PY:2011
  TC:39  AU: Yang, Kai-Yu;Zhu, Wenguang;Xiao, Di;Okamoto, Satoshi;Wang, Ziqiang;Ran, Ying;
7:3:9:5     Electronic structure of (LaNiO3)(2)/(LaAlO3)(N) heterostructures grown along [111]
DOI:10.1103/PhysRevB.85.245131  JN:PHYSICAL REVIEW B  PY:2012
  TC:21  AU: Rueegg, Andreas;Mitra, Chandrima;Demkov, Alexander A.;Fiete, Gregory A.;
7:3:9:6     Ab initio study of Z(2) topological phases in perovskite (111) (SrTiO3)(7)/(SrIrO3)(2) and (KTaO3)(7)/(KPtO3)(2) multilayers
DOI:10.1103/PhysRevB.88.155119  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Lado, J. L.;Pardo, V.;Baldomir, D.;
7:3:9:7     Correlation effects in (111) bilayers of perovskite transition-metal oxides
DOI:10.1103/PhysRevB.89.195121  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Okamoto, Satoshi;Zhu, Wenguang;Nomura, Yusuke;Arita, Ryotaro;Xiao, Di;Nagaosa, Naoto;
7:3:9:8     Epitaxial growth of (111)-oriented LaAlO3/LaNiO3 ultra-thin superlattices
DOI:10.1063/1.4773375  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:11  AU: Middey, S.;Meyers, D.;Kareev, M.;Moon, E. J.;Gray, B. A.;Liu, X.;Freeland, J. W.;Chakhalian, J.;
7:3:9:9     Massive Symmetry Breaking in LaAlO3/SrTiO3(111) Quantum Wells: A Three-Orbital Strongly Correlated Generalization of Graphene
DOI:10.1103/PhysRevLett.111.126804  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:7  AU: Doennig, David;Pickett, Warren E.;Pentcheva, Rossitza;
7:3:9:10     Quantum confinement induced magnetism in LaNiO3-LaMnO3 superlattices
DOI:10.1103/PhysRevB.87.195116  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Dong, Shuai;Dagotto, Elbio;
7:3:9:11     First-principles study of polar LaAlO3 (001) surface stabilization by point defects
DOI:10.1103/PhysRevB.84.045440  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Seo, Hosung;Demkov, Alexander A.;
7:3:9:12     Surface stability of epitaxial La0.7Sr0.3MnO3 thin films on (111)-oriented SrTiO3
DOI:10.1063/1.4804312  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Hallsteinsen, I.;Boschker, J. E.;Nord, M.;Lee, S.;Rzchowski, M.;Vullum, P. E.;Grepstad, J. K.;Holmestad, R.;Eom, C. B.;Tybell, T.;
7:3:9:13     High-temperature multiferroicity and strong magnetocrystalline anisotropy in 3d-5d double perovskites
DOI:10.1103/PhysRevB.83.024410  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Lezaic, Marjana;Spaldin, Nicola A.;
7:3:9:14     Possible correlation-driven odd-parity superconductivity in LaNi7/8Co1/8O3 (111) bilayers
DOI:10.1103/PhysRevB.89.201111  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ye, Bing;Mesaros, Andrej;Ran, Ying;
7:3:9:15     Wetting at the BaTiO3/Pt interface
DOI:10.1063/1.4803705  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Fredrickson, Kurt D.;Posadas, Agham B.;Demkov, Alexander A.;Dubourdieu, Catherine;Bruley, John;
7:3:9:16     Pattern formation in the dipolar Ising model on a two-dimensional honeycomb lattice
DOI:10.1103/PhysRevB.86.024431  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Rueger, Robert;Valenti, Roser;
7:3:9:17     The interface is still the device
DOI:10.1038/nmat3244  JN:NATURE MATERIALS  PY:2012
  TC:0  AU: [Anonymous];
7:3:10:1     Strain-Induced Spin States in Atomically Ordered Cobaltites
DOI:10.1021/nl302562f  JN:NANO LETTERS  PY:2012
  TC:32  AU: Choi, Woo Seok;Kwon, Ji-Hwan;Jeen, Hyoungjeen;Hamann-Borrero, Jorge E.;Radi, Abdullah;Macke, Sebastian;Sutarto, Ronny;He, Feizhou;Sawatzky, George A.;Hinkov, Vladimir;Kim, Miyoung;Lee, Ho Nyung;
7:3:10:2     Dimensionality Controlled Octahedral Symmetry-Mismatch and Functionalities in Epitaxial LaCoO3/SrTiO3 Heterostructures
DOI:10.1021/acs.nanolett.5b01471  JN:NANO LETTERS  PY:2015
  TC:0  AU: Qiao, Liang;Jang, Jae Hyuck;Singh, David J.;Gai, Zheng;Xiao, Haiyan;Mehta, Apurva;Vasudevan, Rama K.;Tselev, Alexander;Feng, Zhenxing;Zhou, Hua;Li, Sean;Prellier, Wilfrid;Zu, Xiaotao;Liu, Zijiang;Borisevich, Albina;Baddorf, Arthur P.;Biegalski, Michael D.;
7:3:10:3     Strain-driven spin-state transition and superexchange interaction in LaCoO3: Ab initio study
DOI:10.1103/PhysRevB.86.014430  JN:PHYSICAL REVIEW B  PY:2012
  TC:18  AU: Seo, Hosung;Posadas, Agham;Demkov, Alexander A.;
7:3:10:4     Atomic-Resolution Imaging of Spin-State Superlattices in Nanopockets within Cobaltite Thin Films
DOI:10.1021/nl1034896  JN:NANO LETTERS  PY:2011
  TC:32  AU: Gazquez, Jaume;Luo, Weidong;Oxley, Mark P.;Prange, Micah;Torija, Maria A.;Sharma, Manish;Leighton, Chris;Pantelides, Sokrates T.;Pennycook, Stephen J.;Varela, Maria;
7:3:10:5     Ferromagnetic insulating state in tensile-strained LaCoO3 thin films from LDA+U calculations
DOI:10.1103/PhysRevB.85.140404  JN:PHYSICAL REVIEW B  PY:2012
  TC:15  AU: Hsu, Han;Blaha, Peter;Wentzcovitch, Renata M.;
7:3:10:6     Lattice mismatch accommodation via oxygen vacancy ordering in epitaxial La0.5Sr0.5CoO3-delta thin films
DOI:10.1063/1.4809547  JN:APL MATERIALS  PY:2013
  TC:21  AU: Gazquez, J.;Bose, Shameek;Sharma, M.;Torija, M. A.;Pennycook, S. J.;Leighton, C.;Varela, M.;
7:3:10:7     X-ray absorption and magnetic circular dichroism of LaCoO3, La0.7Ce0.3CoO3, and La0.7Sr0.3CoO3 films: Evidence for cobalt-valence-dependent magnetism
DOI:10.1103/PhysRevB.82.174416  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Merz, M.;Nagel, P.;Pinta, C.;Samartsev, A.;v Loehneysen, H.;Wissinger, M.;Uebe, S.;Assmann, A.;Fuchs, D.;Schuppler, S.;
7:3:10:8     Nature of ferromagnetic ordered state in LaCoO3 epitaxial nano-thin film on LaAlO3 substrate
DOI:10.1016/j.jallcom.2014.01.126  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Liu, Haifeng;Shi, Lei;Guo, Yuqiao;Zhou, Shiming;Zhao, Jiyin;Wang, Cailin;He, Laifa;Li, Yang;
7:3:10:9     Insulating Ferromagnetic LaCoO3-delta Films: A Phase Induced by Ordering of Oxygen Vacancies
DOI:10.1103/PhysRevLett.112.087202  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:3  AU: Biskup, Neven;Salafranca, Juan;Mehta, Virat;Oxley, Mark P.;Suzuki, Yuri;Pennycook, Stephen J.;Pantelides, Sokrates T.;Varela, Maria;
7:3:10:10     Local atomic and electronic structures of epitaxial strained LaCoO3 thin films
DOI:10.1103/PhysRevB.85.020403  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Sterbinsky, G. E.;Ryan, P. J.;Kim, J. -W.;Karapetrova, E.;Ma, J. X.;Shi, J.;Woicik, J. C.;
7:3:10:11     STEM-EELS imaging of complex oxides and interfaces
DOI:10.1557/mrs.2011.330  JN:MRS BULLETIN  PY:2012
  TC:13  AU: Varela, Maria;Gazquez, Jaume;Pennycook, Stephen J.;
7:3:10:12     Unconventional switching behavior in La0.7Sr0.3MnO3/La0.7Sr0.3CoO3 exchange-spring bilayers
DOI:10.1063/1.4902115  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Binzhi;Chopdekar, Rajesh V.;Arenholz, Elke;Mehta, Apurva;Takamura, Yayoi;
7:3:10:13     Tunnel Conduction in Epitaxial Bilayers of Ferromagnetic LaCoO3/La2/3Sr1/3MnO3 Deposited by a Chemical Solution Method
DOI:10.1021/am506259p  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Lucas, Irene;Manuel Vila-Fungueirino, Jose;Jimenez-Cavero, Pilar;Rivas-Murias, Beatriz;Magen, Cesar;Morellon, Luis;Rivadulla, Francisco;
7:3:10:14     Coercivity enhancement driven by interfacial magnetic phase separation in SrTiO3(001)/Nd0.5Sr0.5CoO3
DOI:10.1103/PhysRevB.84.024417  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Sharma, M.;Gazquez, J.;Varela, M.;Schmitt, J.;Leighton, C.;
7:3:10:15     Chemically Driven Nanoscopic Magnetic Phase Separation at the SrTiO3(001)/La1-xSrxCoO3 Interface
DOI:10.1002/adma.201100417  JN:ADVANCED MATERIALS  PY:2011
  TC:11  AU: Torija, Maria A.;Sharma, Manish;Gazquez, Jaume;Varela, Maria;He, Chunyong;Schmitt, Josh;Borchers, Julie A.;Laver, Mark;El-Khatib, Sami;Leighton, Chris;
7:3:10:16     Nanoscale Spin-State Ordering in LaCoO3 Epitaxial Thin Films
DOI:10.1021/cm5003115  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:6  AU: Kwon, Ji-Hwan;Choi, Woo Seok;Kwon, Young-Kyun;Jung, Ranju;Zuo, Jian-Min;Lee, Ho Nyung;Kim, Miyoung;
7:3:10:17     Spin-Orbital Superstructure in Strained Ferrimagnetic Perovskite Cobalt Oxide
DOI:10.1103/PhysRevLett.111.027206  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Fujioka, J.;Yamasaki, Y.;Nakao, H.;Kumai, R.;Murakami, Y.;Nakamura, M.;Kawasaki, M.;Tokura, Y.;
7:3:10:18     Direct real space observation of magneto-electronic inhomogeneity in ultra-thin film La0.5Sr0.5CoO3-delta on SrTiO3(001)
DOI:10.1063/1.489628.3  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kelly, S.;Galli, F.;Aarts, J.;Bose, Shameek;Sharma, M.;Leighton, C.;
7:3:10:19     Tuning the electronic structure of SrTiO3/SrFeO3-x superlattices via composition and vacancy control
DOI:10.1063/1.4869955  JN:APL MATERIALS  PY:2014
  TC:1  AU: Berger, Robert F.;Broberg, Daniel P.;Neaton, Jeffrey B.;
7:3:10:20     Strain-Induced Ferromagnetism and Magnetoresistance in Epitaxial Thin Films of LaCoO3 Prepared by Polymer-Assisted Deposition
DOI:10.1021/cm3031472  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:11  AU: Rivadulla, Francisco;Bi, Zhenxing;Bauer, Eve;Rivas-Murias, Beatriz;Manuel Vila-Fungueirino, Jose;Jia, Quanxi;
7:3:10:21     Interface Magnetic Coupling in Epitaxial Bilayers of La0.92MnO3/LaCoO3 Prepared by Polymer-Assisted Deposition
DOI:10.1021/cm403868y  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:3  AU: Manuel Vila-Fungueirino, Jose;Rivas-Murias, Beatriz;Rodriguez-Gonzalez, Benito;Rivadulla, Francisco;
7:3:10:22     Thermoelectric and magnetic properties of nanocrystalline La0.7Sr0.3CoO3
DOI:10.1063/1.3699038  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Dura, O. J.;Rogl, P.;Falmbigl, M.;Hilscher, G.;Bauer, E.;
7:3:10:23     Local Oxygen-Vacancy Ordering and Twinned Octahedral Tilting Pattern in the Bi0.81Pb0.19FeO2.905 Cubic Perovskite
DOI:10.1021/cm300178x  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:17  AU: Dachraoui, Walid;Hadermann, Joke;Abakumov, Artem M.;Tsirlin, Alexander A.;Batuk, Dmitry;Glazyrin, Konstantin;McCammon, Catherine;Dubrovinsky, Leonid;Van Tendeloo, Gustaaf;
7:3:10:24     Magnetic correlation between La0.7Sr0.3MnO3 and La0.7Sr0.3CoO3 layers in artificial superlattices
DOI:10.1063/1.4802670  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Malik, Vivek K.;Vo, Chi Hieu;Arenholz, Elke;Scholl, Andreas;Young, Anthony T.;Takamura, Yayoi;
7:3:10:25     Ferrimagnetism in PrCoO3 epitaxial films
DOI:10.1103/PhysRevB.87.020405  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Mehta, Virat V.;Bose, Shameek;Iwata-Harms, Jodi M.;Arenholz, Elke;Leighton, C.;Suzuki, Y.;
7:3:10:26     The electric field manipulation of magnetization in La1-xSrxCoO3/Pb(Mg1/3Nb2/3)O-3-PbTiO3 heterostructures
DOI:10.1063/1.4871087  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhang, Q. M.;Li, Q.;Gao, R. L.;Zhou, W. P.;Wang, L. Y.;Yang, Y. T.;Wang, D. H.;Lv, L. Y.;Du, Y. W.;
7:3:10:27     Realizing in-plane surface diffraction by x-ray multiple-beam diffraction with large incidence angle
DOI:10.1063/1.4901046  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Huang, Xian-Rong;Peng, Ru-Wen;Gog, Thomas;Siddons, D. P.;Assoufid, Lahsen;
7:3:10:28     Ferromagnetism enhanced by structural relaxation of biaxially compressed LaCoO3 films
DOI:10.1063/1.3545809  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Mehta, Virat;Suzuki, Yuri;
7:3:10:29     Ferroelasticity and spin-state transitions of LaCoO3
DOI:10.1063/1.4891296  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Araki, Wakako;Abe, Takehiro;Arai, Yoshio;
7:3:10:30     Growth temperature control of the epitaxy, magnetism, and transport in SrTiO3(001)/La0.5Sr0.5CoO3 thin films
DOI:10.1116/1.3622621  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2011
  TC:2  AU: Sharma, M.;Gazquez, J.;Varela, M.;Schmitt, J.;Leighton, C.;
7:3:10:31     Evolution of the spin-state transition with doping in La1-xSrxCoO3
DOI:10.1103/PhysRevB.86.054428  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Smith, R. X.;Hoch, M. J. R.;Moulton, W. G.;Kuhns, P. L.;Reyes, A. P.;Boebinger, G. S.;Zheng, H.;Mitchell, J. F.;
7:3:10:32     Microscopic origin of the magnetoelectronic phase separation in Sr-doped LaCoO3
DOI:10.1103/PhysRevB.88.035125  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Nemeth, Zoltan;Szabo, Andras;Knizek, Karel;Sikora, Marcin;Chernikov, Roman;Sas, Norbert;Bogdan, Csilla;Nagy, Denes Lajos;Vanko, Gyoergy;
7:3:10:33     Femtosecond optical reflectivity measurements of lattice-mediated spin repulsions in photoexcited LaCoO3 thin films
DOI:10.1103/PhysRevB.89.035129  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Bielecki, J.;Rata, A. D.;Borjesson, L.;
7:3:10:34     Orbital ordering-driven ferromagnetism in LaCoO3 nanowires
DOI:10.1063/1.3482022  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Wang, Yang;Fan, Hong Jin;
7:3:10:35     Direct measurement of the low temperature spin state transitions in La1-xSrxCoO3 (0.05 < x < 0.3)
DOI:10.1063/1.4902756  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Gulec, A.;Klie, R. F.;
7:3:10:36     Strong interfacial magnetic coupling in epitaxial bilayers of LaCoO3/LaMnO3 prepared by chemical solution deposition
DOI:10.1016/j.tsf.2013.11.060  JN:THIN SOLID FILMS  PY:2014
  TC:2  AU: Manuel Vila-Fungueirino, Jose;Rivas-Murias, Beatriz;Rivadulla, Francisco;
7:3:10:37     Electric field manipulation of nonvolatile magnetization in Au/NiO/Pt heterostructure with resistive switching effect
DOI:10.1063/1.4891482  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Xiong, Y. Q.;Zhou, W. P.;Li, Q.;He, M. C.;Du, J.;Cao, Q. Q.;Wang, D. H.;Du, Y. W.;
7:3:11:1     Pulsed laser deposition of SrTiO3/LaGaO3 and SrTiO3/LaAlO3: Plasma plume effects
DOI:10.1063/1.3529487  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:35  AU: Aruta, C.;Amoruso, S.;Bruzzese, R.;Wang, X.;Maccariello, D.;Granozio, F. Miletto;di Uccio, U. Scotti;
7:3:11:2     Conducting interfaces between band insulating oxides: The LaGaO3/SrTiO3 heterostructure
DOI:10.1063/1.3496440  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:40  AU: Perna, P.;Maccariello, D.;Radovic, M.;di Uccio, U. Scotti;Pallecchi, I.;Codda, M.;Marre, D.;Cantoni, C.;Gazquez, J.;Varela, M.;Pennycook, S. J.;Granozio, F. Miletto;
7:3:11:3     Pulsed laser ablation of complex oxides: The role of congruent ablation and preferential scattering for the film stoichiometry
DOI:10.1063/1.4754112  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Wicklein, S.;Sambri, A.;Amoruso, S.;Wang, X.;Bruzzese, R.;Koehl, A.;Dittmann, R.;
7:3:11:4     Oxygen background gas influence on pulsed laser deposition process of LaAlO3 and LaGaO3
DOI:10.1016/j.apsusc.2011.09.078  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:10  AU: Amoruso, S.;Aruta, C.;Aurino, P.;Bruzzese, R.;Wang, X.;Granozio, F. Miletto;di Uccio, U. Scotti;
7:3:11:5     Optimization of La(0.7)Ba(0.3)MnO(3-delta) complex oxide laser ablation conditions by plume imaging and optical emission spectroscopy
DOI:10.1063/1.3467770  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:17  AU: Amoruso, S.;Aruta, C.;Bruzzese, R.;Maccariello, D.;Maritato, L.;Granozio, F. Miletto;Orgiani, P.;di Uccio, U. Scotti;Wang, X.;
7:3:11:6     Critical influence of target-to-substrate distance on conductive properties of LaGaO3/SrTiO3 interfaces deposited at 10(-1) mbar oxygen pressure
DOI:10.1063/1.4737650  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:11  AU: Aruta, C.;Amoruso, S.;Ausanio, G.;Bruzzese, R.;Di Gennaro, E.;Lanzano, M.;Granozio, F. Miletto;Riaz, Muhammad;Sambri, A.;di Uccio, U. Scotti;Wang, X.;
7:3:11:7     Plasma interactions determine the composition in pulsed laser deposited thin films
DOI:10.1063/1.4895788  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chen, Jikun;Doebeli, Max;Stender, Dieter;Conder, Kazimierz;Wokaun, Alexander;Schneider, Christof W.;Lippert, Thomas;
7:3:11:8     Substrate heating influence on the deposition rate of oxides during pulsed laser deposition in ambient gas
DOI:10.1063/1.3565157  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Amoruso, S.;Aruta, C.;Bruzzese, R.;Wang, X.;di Uccio, U. Scotti;
7:3:11:9     High charge carrier density at the NaTaO3/SrTiO3 hetero-interface
DOI:10.1063/1.3625951  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Nazir, S.;Schwingenschloegl, U.;
7:3:11:10     Carrier-number fluctuations in the 2-dimensional electron gas at the LaAlO3/SrTiO3 interface
DOI:10.1063/1.4838637  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Barone, C.;Romeo, F.;Pagano, S.;Di Gennaro, E.;Granozio, F. Miletto;Pallecchi, I.;Marre, D.;di Uccio, U. Scotti;
7:3:11:11     Negative ions: The overlooked species in thin film growth by pulsed laser deposition
DOI:10.1063/1.3660399  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Esposito, M.;Bator, M.;Doebeli, M.;Lippert, T.;Schneider, C. W.;Wokaun, A.;
7:3:11:12     High mobility of the strongly confined hole gas in AgTaO3/SrTiO3
DOI:10.1063/1.4719106  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Nazir, S.;Kahaly, M. Upadhyay;Schwingenschloegl, U.;
7:3:11:13     Strain effects on the spin polarized electron gas in ABO(3)/SrTiO3 (A = Pr, Nd and B = Al, Ga) heterostructures
DOI:10.1063/1.4801514  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Nazir, S.;Schwingenschloegl, U.;
7:3:11:14     Charge transfer mechanism for the formation of metallic states at the KTaO3/SrTiO3 interface
DOI:10.1103/PhysRevB.83.113107  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Nazir, S.;Singh, N.;Schwingenschloegl, U.;
7:3:11:15     The metallic interface between the two band insulators LaGaO3 and SrTiO3
DOI:10.1063/1.3604020  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Nazir, S.;Singh, N.;Schwingenschloegl, U.;
7:3:11:16     Physical properties of La0.7Ba0.3MnO3-delta complex oxide thin films grown by pulsed laser deposition technique
DOI:10.1063/1.3292588  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Orgiani, P.;Ciancio, R.;Galdi, A.;Amoruso, S.;Maritato, L.;
7:3:11:17     Charge modulated interfacial conductivity in SrTiO3-based oxide heterostructures
DOI:10.1063/1.3598391  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Chen, Y. Z.;Stamate, E.;Pryds, N.;Sun, J. R.;Shen, B. G.;Linderoth, S.;
7:3:11:18     On the origin of metallic conductivity at the interface of LaAlO3/SrTiO3
DOI:10.1016/j.apsusc.2012.01.117  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:5  AU: Chen, Y. Z.;Christensen, D. V.;Trier, F.;Pryds, N.;Smith, A.;Linderoth, S.;
7:3:11:19     Vacancy defects in strontium titanate: Ab initio calculation
DOI:10.1016/j.commatsci.2010.06.045  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2010
  TC:14  AU: Djermouni, M.;Zaoui, A.;Kacimi, S.;Bouhafs, B.;
7:3:11:20     Langmuir probe measurements and mass spectrometry of plasma plumes generated by laser ablation of La0.4Ca0.6MnO3
DOI:10.1063/1.4893479  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chen, Jikun;Lunney, James G.;Lippert, Thomas;Ojeda-G-P, Alejandro;Stender, Dieter;Schneider, Christof W.;Wokaun, Alexander;
7:3:11:21     Influence of an O-2 background gas on the composition and kinetic energies of species in laser induced La0.4Ca0.6MnO3 plasmas
DOI:10.1016/j.apsusc.2012.12.090  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:1  AU: Chen, Jikun;Stender, Dieter;Bator, Matthias;Schneider, Christof W.;Lippert, Thomas;Wokaun, Alexander;
7:3:11:22     Vacancy induced metallicity at the CaHfO3/SrTiO3 interface
DOI:10.1063/1.3573808  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Nazir, S.;Pulikkotil, J. J.;Singh, N.;Schwingenschloegl, U.;
7:3:11:23     Composition and species evolution in a laser-induced LuMnO3 plasma
DOI:10.1016/j.apsusc.2012.04.024  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:3  AU: Bator, Matthias;Hu, Yi;Esposito, Martin;Schneider, Christof W.;Lippert, Thomas;Wokaun, Alexander;
7:3:11:24     Structural and magnetic properties of CoTiO3 thin films on SrTiO3 (001)
DOI:10.1016/j.jmmm.2012.12.017  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:3  AU: Schoofs, Frank;Egilmez, Mehmet;Fix, Thomas;MacManus-Driscoll, Judith L.;Blamire, Mark G.;
7:3:11:25     Investigation of the effect of different oxygen partial pressure to LaAlO3 thin film properties and resistive switching characteristics
DOI:10.1016/j.tsf.2011.04.205  JN:THIN SOLID FILMS  PY:2011
  TC:11  AU: Liu, Kou-Chen;Tzeng, Wen-Hsien;Chang, Kow-Ming;Huang, Jiun-Jie;Lee, Yun-Ju;Yeh, Ping-Hung;Chen, Pang-Shiu;Lee, Heng-Yuan;Chen, Frederick;Tsai, Ming-Jinn;
7:3:11:26     Imposed quasi-layer-by-layer homoepitaxial growth of SrTiO3 films by large area pulsed laser deposition
DOI:10.1016/j.tsf.2011.04.023  JN:THIN SOLID FILMS  PY:2011
  TC:5  AU: Chen, Y. Z.;Pryds, N.;
7:3:11:27     Universal origin of unconventional 1/f noise in the weak-localization regime
DOI:10.1103/PhysRevB.87.245113  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Barone, C.;Romeo, F.;Galdi, A.;Orgiani, P.;Maritato, L.;Guarino, A.;Nigro, A.;Pagano, S.;
7:3:11:28     Oxidation of laser-induced plasma species in different background conditions
DOI:10.1016/j.apsusc.2013.01.128  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:0  AU: Bator, Matthias;Schneider, Christof W.;Lippert, Thomas;Wokaun, Alexander;
7:3:11:29     LaAlO3/SrTiO3 Epitaxial Heterostructures by Atomic Layer Deposition
DOI:10.1007/s11664-012-1960-6  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:5  AU: Sbrockey, Nick M.;Luong, Michael;Gallo, Eric M.;Sloppy, Jennifer D.;Chen, Guannan;Winkler, Christopher R.;Johnson, Stephanie H.;Taheri, Mitra L.;Tompa, Gary S.;Spanier, Jonathan E.;
7:3:11:30     Deposition and x-ray characterization of epitaxial thin films of LaAlO3
DOI:10.1016/j.tsf.2013.10.139  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Sonsteby, Henrik Hovde;Ostreng, Erik;Fjellvag, Helmer;Nilsen, Ola;
7:3:11:31     Optimization of electrical properties of Al/LaAlO3/indium tin oxide capacitor by adjusting oxygen pressures in pulsed laser deposition and applying post-deposition annealing at low temperatures
DOI:10.1016/j.tsf.2013.12.032  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Tsai, Jung-Ruey;Feng, Wen-Sheng;Chien, Po-Hsiu;Liu, Kou-Chen;
7:3:11:32     Conducting interfaces between band insulating oxides: The LaGaO3/SrTiO3 heterostructure (vol 97, 152111, 2010)
DOI:10.1063/1.3514199  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:0  AU: Perna, P.;Maccariello, D.;Radovic, M.;di Uccio, U. Scotti;Pallecchi, I.;Codda, M.;Marre, D.;Cantoni, C.;Gazquez, J.;Varela, M.;Pennycook, S. J.;Granozio, F. Miletto;
7:3:12:1     Beyond Condensed Matter Physics on the Nanoscale: The Role of Ionic and Electrochemical Phenomena in the Physical Functionalities of Oxide Materials
DOI:10.1021/nn304930x  JN:ACS NANO  PY:2012
  TC:25  AU: Kalinin, Sergei V.;Borisevich, Albina;Fong, Dillon;
7:3:12:2     Atomic-Scale Compensation Phenomena at Polar Interfaces
DOI:10.1103/PhysRevLett.105.197602  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:34  AU: Chisholm, Matthew F.;Luo, Weidong;Oxley, Mark P.;Pantelides, Sokrates T.;Lee, Ho Nyung;
7:3:12:3     Atomically Resolved Mapping of Polarization and Electric Fields Across Ferroelectric/Oxide Interfaces by Z-contrast Imaging
DOI:10.1002/adma.201004641  JN:ADVANCED MATERIALS  PY:2011
  TC:35  AU: Chang, Hye Jung;Kalinin, Sergei V.;Morozovska, Anna N.;Huijben, Mark;Chu, Ying-Hao;Yu, Pu;Ramesh, Ramamoorthy;Eliseev, Evgeny A.;Svechnikov, George S.;Pennycook, Stephen J.;Borisevich, Albina Y.;
7:3:12:4     Strain-controlled oxygen vacancy formation and ordering in CaMnO3
DOI:10.1103/PhysRevB.88.054111  JN:PHYSICAL REVIEW B  PY:2013
  TC:13  AU: Aschauer, Ulrich;Pfenninger, Reto;Selbach, Sverre M.;Grande, Tor;Spaldin, Nicola A.;
7:3:12:5     Interface dipole between two metallic oxides caused by localized oxygen vacancies
DOI:10.1103/PhysRevB.86.140102  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Borisevich, Albina Y.;Lupini, Andrew R.;He, Jun;Eliseev, Eugene A.;Morozovska, Anna N.;Svechnikov, George S.;Yu, Pu;Chu, Ying-Hao;Ramesh, Ramamoorthy;Pantelides, Sokrates T.;Kalinin, Sergei V.;Pennycook, Stephen J.;
7:3:12:6     Oxygen-Vacancy-Induced Polar Behavior in (LaFeO3)(2)/(SrFeO3) Superlattices
DOI:10.1021/nl500601d  JN:NANO LETTERS  PY:2014
  TC:3  AU: Mishra, Rohan;Kim, Young-Min;Salafranca, Juan;Kim, Seong Keun;Chang, Seo Hyoung;Bhattacharya, Anand;Fong, Dillon D.;Pennycook, Stephen J.;Pantelides, Sokrates T.;Borisevich, Albina Y.;
7:3:12:7     Direct observation of ferroelectric field effect and vacancy-controlled screening at the BiFeO3/LaxSr1-xMnO3 interface
DOI:10.1038/NMAT4058  JN:NATURE MATERIALS  PY:2014
  TC:6  AU: Kim, Young-Min;Morozovska, Anna;Eliseev, Eugene;Oxley, Mark P.;Mishra, Rohan;Selbach, Sverre M.;Grande, Tor;Pantelides, S. T.;Kalinin, Sergei V.;Borisevich, Albina Y.;
7:3:12:8     Structural, electronic and thermoelectric behaviour of CaMnO3 and CaMnO(3-delta)
DOI:10.1039/c4ta01514b  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:2  AU: Molinari, Marco;Tompsett, David A.;Parker, Stephen C.;Azough, Feridoon;Freer, Robert;
7:3:12:9     Exploring Mesoscopic Physics of Vacancy-Ordered Systems through Atomic Scale Observations of Topological Defects
DOI:10.1103/PhysRevLett.109.065702  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:4  AU: Borisevich, A. Y.;Morozovska, A. N.;Kim, Young-Min;Leonard, D.;Oxley, M. P.;Biegalski, M. D.;Eliseev, E. A.;Kalinin, S. V.;
7:3:12:10     Probing oxygen vacancy concentration and homogeneity in solid-oxide fuel-cell cathode materials on the subunit-cell level
DOI:10.1038/NMAT3393  JN:NATURE MATERIALS  PY:2012
  TC:47  AU: Kim, Young-Min;He, Jun;Biegalski, Michael D.;Ambaye, Hailemariam;Lauter, Valeria;Christen, Hans M.;Pantelides, Sokrates T.;Pennycook, Stephen J.;Kalinin, Sergei V.;Borisevich, Albina Y.;
7:3:12:11     Epitaxial Oxygen Getter for a Brownmillerite Phase Transformation in Manganite Films
DOI:10.1002/adma.201003581  JN:ADVANCED MATERIALS  PY:2011
  TC:17  AU: Ferguson, J. D.;Kim, Y.;Kourkoutis, L. Fitting;Vodnick, A.;Woll, A. R.;Muller, D. A.;Brock, J. D.;
7:3:12:12     Oxygen deficiency, vacancy clustering and ionic transport in (La,Sr)CoO3-delta
DOI:10.1016/j.ssi.2010.03.029  JN:SOLID STATE IONICS  PY:2011
  TC:14  AU: Tsipis, E. V.;Naumovich, E. N.;Patrakeev, M. V.;Yaremchenko, A. A.;Marozau, I. P.;Kovalevsky, A. V.;Waerenborgh, J. C.;Kharton, V. V.;
7:3:12:13     Electron-Beam-Induced Perovskite-BrownmilleritePerovskite Structural Phase Transitions in Epitaxial La-2 3 Sr-1/3 MnO3 Films
DOI:10.1002/adma.201305656  JN:ADVANCED MATERIALS  PY:2014
  TC:3  AU: Yao, Lide;Majumdar, Sayani;Akaslompolo, Laura;Inkinen, Sampo;Qin, Qi Hang;van Dijken, Sebastiaan;
7:3:12:14     PbO-deficient PbTiO3: Mass transport, structural effects and possibility for intrinsic screening of the ferroelectric polarization
DOI:10.1063/1.3555336  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Selbach, Sverre M.;Tybell, Thomas;Einarsrud, Mari-Ann;Grande, Tor;
7:3:12:15     Local crystallography analysis for atomically resolved scanning tunneling microscopy images
DOI:10.1088/0957-4484/24/41/415707  JN:NANOTECHNOLOGY  PY:2013
  TC:1  AU: Lin, Wenzhi;Li, Qing;Belianinov, Alexei;Sales, Brian C.;Sefat, Athena;Gai, Zheng;Baddorf, Arthur P.;Pan, Minghu;Jesse, Stephen;Kalinin, Sergei V.;
7:3:12:16     The influences of firing temperatures and excess PbO on the crystal structure and microstructure of (Pb-0.25 Sr-0.75)TiO3 ceramics
DOI:10.1007/s10853-011-5641-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:3  AU: Sumang, Rattiphorn;Bongkarn, Theerachai;
7:3:12:17     Influence of strain on the electronic structure of the TbMnO3/SrTiO3 epitaxial interface
DOI:10.1063/1.3663218  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Venkatesan, S.;Doumlblinger, M.;Daumont, C.;Kooi, B.;Noheda, B.;De Hosson, J. T. M.;Scheu, C.;
7:3:12:18     Influences of Excess Bi2O3 and K2CO3 on Crystal Structure, Microstructure and Dielectric Properties of Bismuth Potassium Titanate Ceramics
DOI:10.1080/10584587.2013.852891  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Wicheanrat, Chamaiporn;Laowanidwatana, Artid;Bongkarn, Theerachai;
7:3:12:19     Thermoelectric properties of CaMnO3 films obtained by soft chemistry synthesis
DOI:10.1557/jmr.2012.63  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:3  AU: Alfaruq, Dimas S.;Otal, Eugenio H.;Aguirre, Myriam H.;Populoh, Sascha;Weidenkaff, Anke;
7:3:13:1     2D Atomic Mapping of Oxidation States in Transition Metal Oxides by Scanning Transmission Electron Microscopy and Electron Energy-Loss Spectroscopy
DOI:10.1103/PhysRevLett.107.107602  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:38  AU: Tan, Haiyan;Turner, Stuart;Yucelen, Emrah;Verbeeck, Jo;Van Tendeloo, Gustaaf;
7:3:13:2     Atomic-resolution chemical mapping using energy-dispersive x-ray spectroscopy
DOI:10.1103/PhysRevB.81.100101  JN:PHYSICAL REVIEW B  PY:2010
  TC:46  AU: D'Alfonso, A. J.;Freitag, B.;Klenov, D.;Allen, L. J.;
7:3:13:3     Atomic-resolution chemical imaging of oxygen local bonding environments by electron energy loss spectroscopy
DOI:10.1063/1.4737208  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:15  AU: Mundy, Julia A.;Mao, Qingyun;Brooks, Charles M.;Schlom, Darrell G.;Muller, David A.;
7:3:13:4     Emergent Chemical Mapping at Atomic-Column Resolution by Energy-Dispersive X-Ray Spectroscopy in an Aberration-Corrected Electron Microscope
DOI:10.1103/PhysRevLett.104.196101  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:30  AU: Chu, M. -W.;Liou, S. C.;Chang, C. -P.;Choa, F. -S.;Chen, C. H.;
7:3:13:5     Atomic-resolution spectroscopic imaging of oxide interfaces
DOI:10.1080/14786435.2010.518983  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:26  AU: Kourkoutis, L. Fitting;Xin, H. L.;Higuchi, T.;Hotta, Y.;Lee, J. H.;Hikita, Y.;Schlom, D. G.;Hwang, H. Y.;Muller, D. A.;
7:3:13:6     Site-specific mapping of transition metal oxygen coordination in complex oxides
DOI:10.1063/1.4770512  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Turner, S.;Egoavil, R.;Batuk, M.;Abakumov, A. A.;Hadermann, J.;Verbeeck, J.;Van Tendeloo, G.;
7:3:13:7     The structure determination of Al20Cu2Mn3 by near atomic resolution chemical mapping
DOI:10.1016/j.jallcom.2014.02.125  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Shen, Zhenju;Liu, Chunhui;Ding, Qingqing;Wang, Shuangbao;Wei, Xiao;Chen, Lu;Li, Jixue;Zhang, Ze;
7:3:13:8     Quantitative Elemental Mapping at Atomic Resolution Using X-Ray Spectroscopy
DOI:10.1103/PhysRevLett.112.085501  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:3  AU: Kothleitner, G.;Neish, M. J.;Lugg, N. R.;Findlay, S. D.;Grogger, W.;Hofer, F.;Allen, L. J.;
7:3:13:9     Atomic Resolution Coordination Mapping in Ca2FeCoO5 Brownmillerite by Spatially Resolved Electron Energy-Loss Spectroscopy
DOI:10.1021/cm300640g  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:14  AU: Turner, Stuart;Verbeeck, Johan;Ramezanipour, Farshid;Greedan, John E.;Van Tendeloo, Gustaaf;Botton, Gianluigi A.;
7:3:13:10     Spectroscopic imaging in electron microscopy
DOI:10.1557/mrs.2011.332  JN:MRS BULLETIN  PY:2012
  TC:7  AU: Pennycook, Stephen J.;Colliex, Christian;
7:3:13:11     Detecting the direction of oxygen bonding in SrTiO3
DOI:10.1103/PhysRevB.88.115120  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Neish, M. J.;Lugg, N. R.;Findlay, S. D.;Haruta, M.;Kimoto, K.;Allen, L. J.;
7:3:13:12     Chemical Mapping and Quantification at the Atomic Scale by Scanning Transmission Electron Microscopy
DOI:10.1021/nn4023558  JN:ACS NANO  PY:2013
  TC:8  AU: Chu, Ming-Wen;Chen, Cheng Hsuan;
7:3:13:13     Removing the effects of elastic and thermal scattering from electron energy-loss spectroscopic data
DOI:10.1063/1.4765657  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Lugg, N. R.;Haruta, M.;Neish, M. J.;Findlay, S. D.;Mizoguchi, T.;Kimoto, K.;Allen, L. J.;
7:3:13:14     Contribution of thermally scattered electrons to atomic resolution elemental maps
DOI:10.1103/PhysRevB.86.024108  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Forbes, B. D.;D'Alfonso, A. J.;Williams, R. E. A.;Srinivasan, R.;Fraser, H. L.;McComb, D. W.;Freitag, B.;Klenov, D. O.;Allen, L. J.;
7:3:13:15     Single atom identification by energy dispersive x-ray spectroscopy
DOI:10.1063/1.3701598  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Lovejoy, T. C.;Ramasse, Q. M.;Falke, M.;Kaeppel, A.;Terborg, R.;Zan, R.;Dellby, N.;Krivanek, O. L.;
7:3:13:16     Chemical mapping at atomic resolution using energy-dispersive x-ray spectroscopy
DOI:10.1557/mrs.2011.331  JN:MRS BULLETIN  PY:2012
  TC:18  AU: Allen, Leslie J.;D'Alfonso, Adrian J.;Freitag, Bert;Klenov, Dmitri O.;
7:3:13:17     Quantum mechanical model for phonon excitation in electron diffraction and imaging using a Born-Oppenheimer approximation
DOI:10.1103/PhysRevB.82.104103  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Forbes, B. D.;Martin, A. V.;Findlay, S. D.;D'Alfonso, A. J.;Allen, L. J.;
7:3:13:18     Towards artifact-free atomic-resolution elemental mapping with electron energy-loss spectroscopy
DOI:10.1063/1.4823704  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Zhu, Y.;Soukiassian, A.;Schlom, D. G.;Muller, D. A.;Dwyer, C.;
7:3:13:19     Atomic-scale chemical quantification of oxide interfaces using energy-dispersive X-ray spectroscopy
DOI:10.1063/1.4804184  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Lu, Ping;Xiong, Jie;Van Benthem, Mark;Jia, Quanxi;
7:3:13:20     Atomic-scale observation of a graded polar discontinuity and a localized two-dimensional electron density at an insulating oxide interface
DOI:10.1103/PhysRevB.87.075129  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Chang, C. -P.;Lin, J. G.;Jeng, H. T.;Cheng, S-L.;Pong, W. F.;Shao, Y. C.;Chin, Y. Y.;Lin, H. -J.;Chen, C. W.;Yang, J. -R.;Chen, C. H.;Chu, M. -W.;
7:3:13:21     Structure of the InAlAs/InP interface by atomically resolved energy dispersive spectroscopy
DOI:10.1063/1.3645632  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Klenov, Dmitri O.;Zide, Joshua M. O.;
7:3:13:22     Atomic resolution chemical bond analysis of oxygen in La2CuO4
DOI:10.1063/1.4819397  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Haruta, M.;Nagai, T.;Lugg, N. R.;Neish, M. J.;Nagao, M.;Kurashima, K.;Allen, L. J.;Mizoguchi, T.;Kimoto, K.;
7:3:13:23     Effect of local coordination of Mn on Mn-L-2,L-3 edge electron energy loss spectrum
DOI:10.1063/1.4817425  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Nishida, Shuji;Kobayashi, Shunsuke;Kumamoto, Akihito;Ikeno, Hidekazu;Mizoguchi, Teruyasu;Tanaka, Isao;Ikuhara, Yuichi;Yamamoto, Takahisa;
7:3:13:24     Visualization of hybridization states with atomic resolution using electron energy loss spectroscopy mapping
DOI:10.1063/1.4704558  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Haruta, M.;Kurashima, K.;Nagai, T.;Komatsu, H.;Shimakawa, Y.;Kurata, H.;Kimoto, K.;
7:3:13:25     Fast Imaging with Inelastically Scattered Electrons by Off-Axis Chromatic Confocal Electron Microscopy
DOI:10.1103/PhysRevLett.112.166101  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Zheng, Changlin;Zhu, Ye;Lazar, Sorin;Etheridge, Joanne;
7:3:13:26     Fano resonance in atomic-resolution spectroscopic imaging of solids
DOI:10.1103/PhysRevB.86.094119  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Dwyer, C.;Xin, H. L.;Muller, D. A.;
7:3:13:27     Three-Dimensional Valency Mapping in Ceria Nanocrystals
DOI:10.1021/nn5047053  JN:ACS NANO  PY:2014
  TC:4  AU: Goris, Bart;Turner, Stuart;Bals, Sara;Van Tendeloo, Gustaaf;
7:3:13:28     Nanoscale Ordering in Oxygen Deficient Quintuple Perovskite Sm2-epsilon Ba3+epsilon Fe5O15-delta: Implication for Magnetism and Oxygen Stoichiometry
DOI:10.1021/cm503276p  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:4  AU: Volkova, Nadezhda E.;Lebedev, Oleg I.;Gavrilova, Ludmila Ya.;Turner, Stuart;Gauquelin, Nicolas;Seikh, Md Motin;Caignaert, Vincent;Cherepanov, Vladimir A.;Raveau, Bernard;Van Tendeloo, Gustaaf;
7:3:13:29     Comment on "2D Atomic Mapping of Oxidation States in Transition Metal Oxides by Scanning Transmission Electron Microscopy and Electron Energy-Loss Spectroscopy"
DOI:10.1103/PhysRevLett.108.259701  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:2  AU: Ahmad, E. A.;Mallia, G.;Kramer, D.;Tileli, V.;Kucernak, A. R.;Harrison, N. M.;
7:3:13:30     Soft x-ray absorption spectroscopy study of Mo-rich SrMn1-xMoxO3 (x >= 0.5)
DOI:10.1103/PhysRevB.83.073103  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Hwang, J. H.;Kim, D. H.;Kang, J. -S.;Kolesnik, S.;Chmaissem, O.;Mais, J.;Dabrowski, B.;Baik, J.;Shin, H. J.;Lee, Jieun;Kim, Bongjae;Min, B. I.;
7:3:13:31     Comment on "2D Atomic Mapping of Oxidation States in Transition Metal Oxides by Scanning Transmission Electron Microscopy and Electron Energy-Loss Spectroscopy" Reply
DOI:10.1103/PhysRevLett.108.259702  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:0  AU: Tan, Haiyan;Turner, Stuart;Yucelen, Emrah;Verbeeck, Jo;Van Tendeloo, Gustaaf;
7:3:13:32     Achromatic Elemental Mapping Beyond the Nanoscale in the Transmission Electron Microscope
DOI:10.1103/PhysRevLett.110.185507  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Urban, K. W.;Mayer, J.;Jinschek, J. R.;Neish, M. J.;Lugg, N. R.;Allen, L. J.;
7:3:14:1     Electrostatic carrier doping of GdTiO3/SrTiO3 interfaces
DOI:10.1063/1.3669402  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:59  AU: Moetakef, Pouya;Cain, Tyler A.;Ouellette, Daniel G.;Zhang, Jack Y.;Klenov, Dmitri O.;Janotti, Anderson;Van de Walle, Chris G.;Rajan, Siddharth;Allen, S. James;Stemmer, Susanne;
7:3:14:2     Correlation between metal-insulator transitions and structural distortions in high-electron-density SrTiO3 quantum wells
DOI:10.1103/PhysRevB.89.075140  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Zhang, Jack Y.;Jackson, Clayton A.;Chen, Ru;Raghavan, Santosh;Moetakef, Pouya;Balents, Leon;Stemmer, Susanne;
7:3:14:3     Transport in ferromagnetic GdTiO3/SrTiO3 heterostructures
DOI:10.1063/1.3568894  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:25  AU: Moetakef, Pouya;Zhang, Jack Y.;Kozhanov, Alexander;Jalan, Bharat;Seshadri, Ram;Allen, S. James;Stemmer, Susanne;
7:3:14:4     Symmetry Lowering in Extreme-Electron-Density Perovskite Quantum Wells
DOI:10.1103/PhysRevLett.110.256401  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:11  AU: Zhang, Jack Y.;Hwang, Jinwoo;Raghavan, Santosh;Stemmer, Susanne;
7:3:14:5     Toward an artificial Mott insulator: Correlations in confined high-density electron liquids in SrTiO3
DOI:10.1103/PhysRevB.86.201102  JN:PHYSICAL REVIEW B  PY:2012
  TC:15  AU: Moetakef, Pouya;Jackson, Clayton A.;Hwang, Jinwoo;Balents, Leon;Allen, S. James;Stemmer, Susanne;
7:3:14:6     Interface-induced magnetism in perovskite quantum wells
DOI:10.1103/PhysRevB.88.180403  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Jackson, Clayton A.;Stemmer, Susanne;
7:3:14:7     Stoichiometry-driven metal-to-insulator transition in NdTiO3/SrTiO3 heterostructures
DOI:10.1063/1.4866867  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Xu, Peng;Phelan, Daniel;Jeong, Jong Seok;Mkhoyan, K. Andre;Jalan, Bharat;
7:3:14:8     Growth window and effect of substrate symmetry in hybrid molecular beam epitaxy of a Mott insulating rare earth titanate
DOI:10.1116/1.4804180  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2013
  TC:20  AU: Moetakef, Pouya;Zhang, Jack Y.;Raghavan, Santosh;Kajdos, Adam P.;Stemmer, Susanne;
7:3:14:9     Growth and properties of GdTiO3 films prepared by hybrid molecular beam epitaxy
DOI:10.1016/j.jcrysgro.2012.06.052  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:11  AU: Moetakef, Pouya;Ouellette, Daniel G.;Zhang, Jack Y.;Cain, Tyler A.;Allen, S. James;Stemmer, Susanne;
7:3:14:10     Seebeck coefficient of a quantum confined, high-electron-density electron gas in SrTiO3
DOI:10.1063/1.4704363  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Cain, Tyler A.;Lee, SungBin;Moetakef, Pouya;Balents, Leon;Stemmer, Susanne;Allen, S. James;
7:3:14:11     Extreme charge density SrTiO3/GdTiO3 heterostructure field effect transistors
DOI:10.1063/1.4811273  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:11  AU: Boucherit, M.;Shoron, O. F.;Cain, T. A.;Jackson, C. A.;Stemmer, S.;Rajan, S.;
7:3:14:12     Dimer Mott insulator in an oxide heterostructure
DOI:10.1103/PhysRevB.87.161119  JN:PHYSICAL REVIEW B  PY:2013
  TC:10  AU: Chen, Ru;Lee, SungBin;Balents, Leon;
7:3:14:13     Modulation of over 10(14) cm(-2) electrons in SrTiO3/GdTiO3 heterostructures
DOI:10.1063/1.4875796  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Boucherit, M.;Shoron, O.;Jackson, C. A.;Cain, T. A.;Buffon, M. L. C.;Polchinski, C.;Stemmer, S.;Rajan, S.;
7:3:14:14     A high density two-dimensional electron gas in an oxide heterostructure on Si (001)
DOI:10.1063/1.4902433  JN:APL MATERIALS  PY:2014
  TC:4  AU: Jin, E. N.;Kornblum, L.;Kumah, D. P.;Zou, K.;Broadbridge, C. C.;Ngai, J. H.;Ahn, C. H.;Walker, F. J.;
7:3:14:15     Magnetism and local structure in low-dimensional Mott insulating GdTiO3
DOI:10.1103/PhysRevB.88.121104  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Zhang, Jack Y.;Jackson, Clayton A.;Raghavan, Santosh;Hwang, Jinwoo;Stemmer, Susanne;
7:3:14:16     Electron Doping by Charge Transfer at LaFeO3/Sm2CuO4 Epitaxial Interfaces
DOI:10.1002/adma.201203483  JN:ADVANCED MATERIALS  PY:2013
  TC:1  AU: Bruno, Flavio Y.;Schmidt, Rainer;Varela, Maria;Garcia-Barriocanal, Javier;Rivera-Calzada, Alberto;Cuellar, Fabian A.;Leon, Carlos;Thakur, Pardeep;Cezar, Julio C.;Brookes, Nicholas B.;Garcia-Hernandez, Mar;Dagotto, Elbio;Pennycook, Stephen J.;Santamaria, Jacobo;
7:3:14:17     Band offsets in complex-oxide thin films and heterostructures of SrTiO3/LaNiO3 and SrTiO3/GdTiO3 by soft and hard X-ray photoelectron spectroscopy
DOI:10.1063/1.4795612  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Conti, G.;Kaiser, A. M.;Gray, A. X.;Nemsak, S.;Palsson, G. K.;Son, J.;Moetakef, P.;Janotti, A.;Bjaalie, L.;Conlon, C. S.;Eiteneer, D.;Greer, A. A.;Keqi, A.;Rattanachata, A.;Saw, A. Y.;Bostwick, A.;Stolte, W. C.;Gloskovskii, A.;Drube, W.;Ueda, S.;Kobata, M.;Kobayashi, K.;Van de Walle, C. G.;Stemmer, S.;Schneider, C. M.;Fadley, C. S.;
7:3:14:18     Modulation doping to control the high-density electron gas at a polar/non-polar oxide interface
DOI:10.1063/1.4752439  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Cain, Tyler A.;Moetakef, Pouya;Jackson, Clayton A.;Stemmer, Susanne;
7:3:14:19     Capacitance-voltage analysis of high-carrier-density SrTiO3/GdTiO3 heterostructures
DOI:10.1063/1.4726263  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Jackson, Clayton A.;Moetakef, Pouya;Allen, S. James;Stemmer, Susanne;
7:3:14:20     Anisotropic thermal properties in orthorhombic perovskites
DOI:10.1007/s10853-009-3912-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:9  AU: Steele, B.;Burns, A. D.;Chernatynskiy, A.;Grimes, R. W.;Phillpot, S. R.;
7:3:14:21     Formation of orbital-selective electron states in LaTiO3/SrTiO3 superlattices
DOI:10.1103/PhysRevB.87.241101  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Lechermann, Frank;Boehnke, Lewin;Grieger, Daniel;
7:3:14:22     Crossover behavior of the crystal structure and the relation to magnetism in perovskite RTiO3
DOI:10.1103/PhysRevB.82.020401  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Takubo, K.;Shimuta, M.;Kim, J. E.;Kato, K.;Takata, M.;Katsufuji, T.;
7:3:14:23     Au-gated SrTiO3 field-effect transistors with large electron concentration and current modulation
DOI:10.1063/1.4896275  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Verma, Amit;Raghavan, Santosh;Stemmer, Susanne;Jena, Debdeep;
7:3:14:24     Structural, magnetic, and electronic properties of GdTiO3 Mott insulator thin films grown by pulsed laser deposition
DOI:10.1063/1.4899277  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Grisolia, M. N.;Bruno, F. Y.;Sando, D.;Zhao, H. J.;Jacquet, E.;Chen, X. M.;Bellaiche, L.;Barthelemy, A.;Bibes, M.;
7:3:15:1     Epitaxial growth, structure, and intermixing at the LaAlO3/SrTiO3 interface as the film stoichiometry is varied
DOI:10.1103/PhysRevB.83.085408  JN:PHYSICAL REVIEW B  PY:2011
  TC:36  AU: Qiao, L.;Droubay, T. C.;Varga, T.;Bowden, M. E.;Shutthanandan, V.;Zhu, Z.;Kaspar, T. C.;Chambers, S. A.;
7:3:15:2     Effect of Growth Induced (Non) Stoichiometry on Interfacial Conductance in LaAlO3/SrTiO3
DOI:10.1103/PhysRevLett.110.196804  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:21  AU: Breckenfeld, E.;Bronn, N.;Karthik, J.;Damodaran, A. R.;Lee, S.;Mason, N.;Martin, L. W.;
7:3:15:3     Strain evolution in non-stoichiometric heteroepitaxial thin-film perovskites
DOI:10.1039/c3tc31653j  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:4  AU: Breckenfeld, E.;Shah, A. B.;Martin, L. W.;
7:3:15:4     Effect of Growth Induced (Non)Stoichiometry on the Structure, Dielectric Response, and Thermal Conductivity of SrTiO3 Thin Films
DOI:10.1021/cm203042q  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:35  AU: Breckenfeld, E.;Wilson, R.;Karthik, J.;Damodaran, A. R.;Cahill, D. G.;Martin, L. W.;
7:3:15:5     OXIDE ELECTRONICS Interface takes charge over Si
DOI:10.1038/nmat2965  JN:NATURE MATERIALS  PY:2011
  TC:36  AU: Schlom, Darrell G.;Mannhart, Jochen;
7:3:15:6     The metallic interface between insulating NdGaO3 and SrTiO3 perovskites
DOI:10.1063/1.4830042  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Li, Chen;Xu, Qinfang;Wen, Zheng;Zhang, Shantao;Li, Aidong;Wu, Di;
7:3:15:7     Effects of Nonequilibrium Growth, Nonstoichiometry, and Film Orientation on the Metal-to-Insulator Transition in NdNiO3 Thin Films
DOI:10.1021/am506436s  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Breckenfeld, Eric;Chen, Zuhuang;Damodaran, Anoop. R.;Martin, Lane W.;
7:3:15:8     Impact of structural transitions on electron transport at LaAlO3/SrTiO3 heterointerfaces
DOI:10.1063/1.3687706  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Schoofs, Frank;Egilmez, Mehmet;Fix, Thomas;MacManus-Driscoll, Judith L.;Blamire, Mark G.;
7:3:15:9     Stoichiometry control of the electronic properties of the LaAlO3/SrTiO3 heterointerface
DOI:10.1063/1.4812353  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:14  AU: Sato, H. K.;Bell, C.;Hikita, Y.;Hwang, H. Y.;
7:3:15:10     Nonstoichiometric material transfer in the pulsed laser deposition of LaAlO3
DOI:10.1063/1.3487778  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Droubay, T. C.;Qiao, L.;Kaspar, T. C.;Engelhard, M. H.;Shutthanandan, V.;Chambers, S. A.;
7:3:15:11     Structural coupling across the LaAlO3/SrTiO3 interface: High-resolution x-ray diffraction study
DOI:10.1103/PhysRevB.84.205418  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Boschker, J. E.;Folkman, C.;Bark, C. W.;Monsen, A. F.;Folven, E.;Grepstad, J. K.;Wahlstrom, E.;Eom, C. B.;Tybell, T.;
7:3:15:12     Non-conducting interfaces of LaAlO3/SrTiO3 produced in sputter deposition: The role of stoichiometry
DOI:10.1063/1.4798828  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Dildar, I. M.;Boltje, D. B.;Hesselberth, M. H. S.;Aarts, J.;Xu, Q.;Zandbergen, H. W.;Harkema, S.;
7:3:15:13     Effect of growth induced (non)stoichiometry on the thermal conductivity, permittivity, and dielectric loss of LaAlO3 films
DOI:10.1063/1.4818718  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Breckenfeld, E.;Wilson, R. B.;Martin, L. W.;
7:3:15:14     Stoichiometry of LaAlO3 films grown on SrTiO3 by pulsed laser deposition
DOI:10.1063/1.4811821  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Golalikhani, M.;Lei, Q. Y.;Chen, G.;Spanier, J. E.;Ghassemi, H.;Johnson, C. L.;Taheri, M. L.;Xi, X. X.;
7:3:15:15     Tunable photovoltaic effect and solar cell performance of self-doped perovskite SrTiO3
DOI:10.1063/1.4766279  JN:AIP ADVANCES  PY:2012
  TC:6  AU: Jin, K. X.;Li, Y. F.;Wang, Z. L.;Peng, H. Y.;Lin, W. N.;Kyaw, A. K. K.;Jin, Y. L.;Jin, K. J.;Sun, X. W.;Soci, C.;Wu, Tom;
7:3:15:16     Tunability of conduction at the LaAlO3/SrTiO3 heterointerface: Thickness and compositional studies
DOI:10.1063/1.4896778  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Breckenfeld, E.;Bronn, N.;Mason, N.;Martin, L. W.;
7:3:15:17     First-principles prediction of a two dimensional electron gas at the BiFeO3/SrTiO3 interface
DOI:10.1063/1.3624457  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Zhang, Zhen;Wu, Ping;Chen, Lang;Wang, Junling;
7:3:15:18     Dominant role of oxygen vacancies in electrical properties of unannealed LaAlO3/SrTiO3 interfaces
DOI:10.1063/1.4863800  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Liu, Z. Q.;Sun, L.;Huang, Z.;Li, C. J.;Zeng, S. W.;Han, K.;Lu, W. M.;Venkatesan, T.;Ariando;
7:3:15:19     Static and ultrafast dynamics of defects of SrTiO3 in LaAlO3/SrTiO3 heterostructures
DOI:10.1063/1.3554705  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Wang, X.;Chen, J. Q.;Barman, A. Roy;Dhar, S.;Xu, Q. -H.;Venkatesan, T.;Ariando;
7:3:15:20     The surface structure of SrTiO3 at high temperatures under influence of oxygen
DOI:10.1063/1.4864186  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Hesselberth, M. B. S.;van der Molen, S. J.;Aarts, J.;
7:3:15:21     Depth dependence of the structural phase transition of SrTiO3 studied with beta-NMR and grazing incidence x-ray diffraction
DOI:10.1103/PhysRevB.83.224112  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Salman, Z.;Smadella, M.;MacFarlane, W. A.;Patterson, B. D.;Willmott, P. R.;Chow, K. H.;Hossain, M. D.;Saadaoui, H.;Wang, D.;Kiefl, R. F.;
7:3:15:22     Correlation between surface rumpling and structural phase transformation in SrTiO3
DOI:10.1103/PhysRevB.85.115450  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Singh, Surendra;Chien, Te-Yu;Guest, J. R.;Fitzsimmons, M. R.;
7:3:16:1     Single domain to multidomain transition due to in-plane magnetic anisotropy in phase-separated (La0.4Pr0.6)(0.67)Ca0.33MnO3 thin films
DOI:10.1103/PhysRevB.83.064408  JN:PHYSICAL REVIEW B  PY:2011
  TC:18  AU: Jeen, Hyoungjeen;Biswas, Amlan;
7:3:16:2     Anisotropic-strain-induced antiferromagnetic-insulating state with strong phase instability in epitaxial (La0.8Pr0.2)(0.67)Ca0.33MnO3 films
DOI:10.1063/1.3313937  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Zhang, F. H.;Huang, Z.;Gao, G. Y.;Chen, P. F.;Wang, L. F.;Tan, X. L.;Wu, W. B.;
7:3:16:3     Coupling of magnetic field and lattice strain and its impact on electronic phase separation in La0.335Pr0.335Ca0.33MnO3/ferroelectric crystal heterostructures
DOI:10.1063/1.4860415  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Zheng, M.;Li, X. Y.;Yang, M. M.;Zhu, Q. X.;Wang, Y.;Li, X. M.;Shi, X.;Chan, H. L. W.;Li, X. G.;Luo, H. S.;Zheng, R. K.;
7:3:16:4     Neutron scattering-The key characterization tool for nanostructured magnetic materials
DOI:10.1016/j.jmmm.2013.09.028  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:5  AU: Fitzsimmons, M. R.;Schuller, Ivan K.;
7:3:16:5     Magnetic Nonuniformity and Thermal Hysteresis of Magnetism in a Manganite Thin Film
DOI:10.1103/PhysRevLett.108.077207  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:12  AU: Singh, Surendra;Fitzsimmons, M. R.;Lookman, T.;Thompson, J. D.;Jeen, H.;Biswas, A.;Roldan, M. A.;Varela, M.;
7:3:16:6     Ultra-sharp oscillatory magneto-resistance in spatially confined La0.3Pr0.4Ca0.3MnO3 epitaxial thin films
DOI:10.1063/1.4900491  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Alagoz, H. S.;Jeon, J.;Boos, R.;Ahangharnejhad, R. H.;Chow, K. H.;Jung, J.;
7:3:16:7     Highly anisotropic resistivities in the double-exchange model for strained manganites
DOI:10.1103/PhysRevB.82.035118  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Dong, Shuai;Yunoki, Seiji;Zhang, Xiaotian;Sen, Cengiz;Liu, J. -M.;Dagotto, Elbio;
7:3:16:8     Role of elastic bending stress on magnetism of a manganite thin film studied by polarized neutron reflectometry
DOI:10.1103/PhysRevB.85.214440  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Singh, Surendra;Fitzsimmons, M. R.;Lookman, T.;Jeen, H.;Biswas, A.;Roldan, M. A.;Varela, M.;
7:3:16:9     Electric field driven dynamic percolation in electronically phase separated (La0.4Pr0.6)(0.67)Ca0.33MnO3 thin films
DOI:10.1103/PhysRevB.88.024415  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Jeen, Hyoungjeen;Biswas, Amlan;
7:3:16:10     Temperature dependence of nanometer-size metallic phase texture and its correlation with bulk magnetic and transport properties and defects of a (La0.4Pr0.6)(0.67)Ca0.33MnO3 film
DOI:10.1063/1.4733666  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Singh, Surendra;Fitzsimmons, M. R.;Jeen, H.;Biswas, A.;Hawley, M. E.;
7:3:16:11     Asymmetric electroresistance of cluster glass state in manganites
DOI:10.1063/1.4870480  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Lourembam, James;Ding, Junfeng;Bera, Ashok;Lin, Weinan;Wu, Tom;
7:3:16:12     Direct visualization of first-order magnetic transition in La5/8-yPryCa3/8MnO3 (y=0.45) thin films
DOI:10.1103/PhysRevB.87.064412  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Rawat, R.;Kushwaha, Pallavi;Mishra, Dileep K.;Sathe, V. G.;
7:3:16:13     Influence of the magnitude and direction of applied elastic stress on the transport properties of (La0.4Pr0.6)(0.67)Ca0.33MnO3 thin films
DOI:10.1063/1.4879282  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Singh, Surendra;Fitzsimmons, M. R.;Jeen, H.;Biswas, A.;
7:3:16:14     Colossal anisotropic resistivity and oriented magnetic domains in strained La0.325Pr0.3Ca0.375MnO3 films
DOI:10.1063/1.4878557  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Jiang, Tao;Yang, Shengwei;Zhou, Haibiao;Liu, Yukuai;Zhao, Wenbo;Feng, Lei;Hou, Yubin;Lu, Qingyou;Li, Xiaoguang;
7:3:16:15     Dynamics of a first-order electronic phase transition in manganites
DOI:10.1103/PhysRevB.83.125125  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Ward, T. Z.;Gai, Z.;Guo, H. W.;Yin, L. F.;Shen, J.;
7:3:16:16     Elastically controlled manipulation of the magnetic order parameter and the metal-insulator transition in a manganite thin film
DOI:10.1103/PhysRevB.90.060407  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Singh, Surendra;Fitzsimmons, M. R.;Lookman, T.;Jeen, H.;Biswas, A.;
7:3:16:17     Dependence of negative differential resistance on electronic phase separation in unpatterned manganite films
DOI:10.1063/1.3684806  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Ding, J. F.;Jin, K. X.;Zhang, Z.;Wu, T.;
7:3:16:18     Imaging the First-Order Magnetic Transition in La0.35Pr0.275Ca0.375MnO3
DOI:10.1103/PhysRevLett.108.237202  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:10  AU: Burkhardt, Mark H.;Hossain, M. A.;Sarkar, S.;Chuang, Y. -D.;Gonzalez, A. G. Cruz;Doran, A.;Scholl, A.;Young, A. T.;Tahir, N.;Choi, Y. J.;Cheong, S. -W.;Duerr, H. A.;Stoehr, J.;
7:3:16:19     Electrophoretic-like Gating Used To Control Metal-Insulator Transitions in Electronically Phase Separated Manganite Wires
DOI:10.1021/nl4016842  JN:NANO LETTERS  PY:2013
  TC:10  AU: Guo, Hangwen;Noh, Joo H.;Dong, Shuai;Rack, Philip D.;Gai, Zheng;Xu, Xiaoshan;Dagotto, Elbio;Shen, Jian;Ward, T. Zac;
7:3:16:20     Electronic and magnetic properties of manganite thin films with different compositions and its correlation with transport properties: An X-ray resonant magnetic scattering study
DOI:10.1063/1.4902959  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Singh, Surendra;Freeland, J. W.;Fitzsimmons, M. R.;Jeen, H.;Biswas, A.;
7:3:16:21     Controlling the sharpness of metal-insulator transition in epitaxial (La1-xPrx)(0.67)Ca0.33MnO3 (0 <= x <= 0.35) films
DOI:10.1063/1.4897460  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chen, Pingfan;Huang, Zhen;Tan, Xuelian;Chen, Binbin;Zhi, Bowen;Gao, Guanyin;Chen, Feng;Wu, Wenbin;
7:3:16:22     Giant in-plane anisotropy in manganite thin films driven by strain-engineered double exchange interaction and electronic phase separation
DOI:10.1063/1.3643442  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Lu, C. L.;Wu, Y. Y.;Xia, Z. C.;Yuan, S. L.;Chen, L.;Tian, Z. M.;Liu, J. -M.;Wu, T.;
7:3:16:23     Reentrant low-field magneto-resistance in La0.3Pr0.4Ca0.3MnO3 film due to spatial confinement
DOI:10.1063/1.4869487  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Jeon, J.;Alagoz, H. S.;Boos, R.;Jung, J.;Chow, K. H.;
7:3:16:24     Giant intrinsic tunnel magnetoresistance in manganite thin films etched with antidot arrays
DOI:10.1063/1.4867083  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Li, Hui;Li, Lin;Li, Long;Liang, Haixing;Cheng, Long;Zhai, Xiaofang;Zeng, Changgan;
7:3:16:25     Surface inhomogeneities and the electronic phase separated states in thin films of La0.35Pr0.35Ca0.3MnO3
DOI:10.1063/1.4884679  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Jeon, J.;Alagoz, H. S.;Jung, J.;Chow, K. H.;
7:3:16:26     Stabilization of robust antiferromagnetic insulating phase in Nd1-xSrxMnO3 (x=0.46) by application of biaxial strain
DOI:10.1016/j.tsf.2014.07.018  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Kumar, Dhirendra;Kumar, Satish;Rawat, Rajeev;Choudhary, R. J.;Sathe, V. G.;
7:3:16:27     Multilevel hierarchy of phase separation processes in La5/8-yPryCa3/8MnO3
DOI:10.1103/PhysRevB.84.024425  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Garcia-Munoz, J. L.;Collado, A.;Aranda, M. A. G.;Ritter, C.;
7:3:16:28     Unusual giant anisotropic magnetoresistance in manganite strips
DOI:10.1063/1.4883889  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Chen, Jinjie;Wei, Wengang;Zhang, Kai;Du, Kai;Zhu, Yinyan;Liu, Hao;Yin, Lifeng;Shen, Jian;
7:3:16:29     Fabrication and magnetic properties of single-crystalline La0.33Pr0.34Ca0.33MnO3/MgO nanowires
DOI:10.1063/1.4819828  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Li, Lin;Li, Hui;Zhai, Xiaofang;Zeng, Changgan;
7:3:16:30     Suppression of photovoltaic effect by magnetic field in Pr-0.65(Ca0.75Sr0.25)(0.35)MnO3/Nb:SrTiO3 heterostructure
DOI:10.1063/1.4832331  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Luo, C.;Jin, K. X.;Chen, C. L.;Wu, T.;
7:3:16:31     Highly anisotropic resistivities in the double-exchange model for strained manganites (vol 82, 035118, 2010)
DOI:10.1103/PhysRevB.82.159902  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Dong, Shuai;Yunoki, Seiji;Zhang, Xiaotian;Sen, Cengiz;Liu, J. -M.;Dagotto, Elbio;
7:3:16:32     Anomalous phase separation in La0.225Pr0.4Ca0.375MnO3: consequence of temperature and magnetic-field cycles
DOI:10.1007/s00339-011-6284-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:2  AU: Yan, Z. B.;Liu, J.-M.;
7:3:16:33     Magnetic and charge ordering properties of Bi0.6-x(RE)(x)Ca0.4MnO3 (0.0 <= x <= 0.6) perovskite manganites
DOI:10.1063/1.3675982  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Yadav, Kamlesh;Singh, M. P.;Singh, H. K.;Razavi, F. S.;Varma, G. D.;
7:3:16:34     Dynamic phase separation as revealed by the strong resistance relaxation in epitaxially shear-strained La0.67Ca0.33MnO3/NdGaO3(001) thin-films
DOI:10.1016/j.jmmm.2010.07.003  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:2  AU: Huang, Zhen;Gao, Guanyin;Zhang, Fuheng;Feng, Xianxian;Hu, Ling;Zhao, Xiaoru;Sun, Yuping;Wu, Wenbin;
7:3:16:35     LPCMO nano-templates grown using substrate induced strain
DOI:10.1016/j.mseb.2011.07.016  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:0  AU: Dhakal, Tara;Yun, Sunghee;Tosado, Jacob;Margankunte, Naveen;Biswas, Amlan;
7:3:17:1     Evolution of the Interfacial Structure of LaAlO3 on SrTiO3
DOI:10.1103/PhysRevLett.106.036101  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:55  AU: Pauli, S. A.;Leake, S. J.;Delley, B.;Bjoerck, M.;Schneider, C. W.;Schlepuetz, C. M.;Martoccia, D.;Paetel, S.;Mannhart, J.;Willmott, P. R.;
7:3:17:2     Electron Transfer and Ionic Displacements as the Origin of the 2D Electron Gas at the LAO/STO Interface: Direct Measurements with Atomic-Column Spatial Resolution
DOI:10.1002/adma.201200667  JN:ADVANCED MATERIALS  PY:2012
  TC:42  AU: Cantoni, Claudia;Gazquez, Jaume;Granozio, Fabio Miletto;Oxley, Mark P.;Varela, Maria;Lupini, Andrew R.;Pennycook, Stephen J.;Aruta, Carmela;di Uccio, Umberto Scotti;Perna, Paolo;Maccariello, Davide;
7:3:17:3     Electrostriction at the LaAlO3/SrTiO3 Interface
DOI:10.1103/PhysRevLett.107.056102  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:32  AU: Cancellieri, C.;Fontaine, D.;Gariglio, S.;Reyren, N.;Caviglia, A. D.;Fete, A.;Leake, S. J.;Pauli, S. A.;Willmott, P. R.;Stengel, M.;Ghosez, Ph.;Triscone, J. -M.;
7:3:17:4     Photodoping and in-gap interface states across the metal-insulator transition in LaAlO3/SrTiO3 heterostructures
DOI:10.1103/PhysRevB.86.045127  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Ristic, Z.;Di Capua, R.;Chiarella, F.;De Luca, G. M.;Maggio-Aprile, I.;Radovic, M.;Salluzzo, M.;
7:3:17:5     Conducting and insulating LaAlO3/SrTiO3 interfaces: A comparative surface photovoltage investigation
DOI:10.1063/1.4858376  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Beyreuther, E.;Paparo, D.;Thiessen, A.;Grafstroem, S.;Eng, L. M.;
7:3:17:6     Mixed Dimensionality of Confined Conducting Electrons in the Surface Region of SrTiO3
DOI:10.1103/PhysRevLett.113.086801  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:2  AU: Plumb, N. C.;Salluzzo, M.;Razzoli, E.;Mansson, M.;Falub, M.;Krempasky, J.;Matt, C. E.;Chang, J.;Schulte, M.;Braun, J.;Ebert, H.;Minar, J.;Delley, B.;Zhou, K. -J.;Schmitt, T.;Shi, M.;Mesot, J.;Patthey, L.;Radovic, M.;
7:3:17:7     Structural and Electronic Reconstructions at the LaAlO3/SrTiO3 Interface
DOI:10.1002/adma.201204555  JN:ADVANCED MATERIALS  PY:2013
  TC:17  AU: Salluzzo, M.;Gariglio, S.;Torrelles, X.;Ristic, Z.;Di Capua, R.;Drnec, J.;Sala, M. Moretti;Ghiringhelli, G.;Felici, R.;Brookes, N. B.;
7:3:17:8     Structural Comparison of n-Type and p-Type LaAlO3/SrTiO3 Interfaces
DOI:10.1103/PhysRevLett.107.036104  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:18  AU: Yamamoto, Ryosuke;Bell, Christopher;Hikita, Yasuyuki;Hwang, Harold Y.;Nakamura, Hiroyuki;Kimura, Tsuyoshi;Wakabayashi, Yusuke;
7:3:17:9     Atomic Layer Engineering of Perovskite Oxides for Chemically Sharp Heterointerfaces
DOI:10.1002/adma.201202691  JN:ADVANCED MATERIALS  PY:2012
  TC:11  AU: Choi, Woo Seok;Rouleau, Christopher M.;Seo, Sung Seok A.;Luo, Zhenlin;Zhou, Hua;Fister, Timothy T.;Eastman, Jeffrey A.;Fuoss, Paul H.;Fong, Dillon D.;Tischler, Jonathan Z.;Eres, Gyula;Chisholm, Matthew F.;Lee, Ho Nyung;
7:3:17:10     Spectral and spatial distribution of polarization at the LaAlO3/SrTiO3 interface
DOI:10.1103/PhysRevB.83.155405  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Rubano, A.;Fiebig, M.;Paparo, D.;Marino, A.;Maccariello, D.;di Uccio, U. Scotti;Granozio, F. Miletto;Marrucci, L.;Richter, C.;Paetel, S.;Mannhart, J.;
7:3:17:11     Observation of a two-dimensional electron gas at the surface of annealed SrTiO3 single crystals by scanning tunneling spectroscopy
DOI:10.1103/PhysRevB.86.155425  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Di Capua, R.;Radovic, M.;De Luca, G. M.;Maggio-Aprile, I.;Granozio, F. Miletto;Plumb, N. C.;Ristic, Z.;di Uccio, U. Scotti;Vaglio, R.;Salluzzo, M.;
7:3:17:12     Potential-well depth at amorphous-LaAlO3/crystalline-SrTiO3 interfaces measured by optical second harmonic generation
DOI:10.1063/1.4886413  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: De Luca, Gabriele;Rubano, Andrea;di Gennaro, Emiliano;Khare, Amit;Granozio, Fabio Miletto;di Uccio, Umberto Scotti;Marrucci, Lorenzo;Paparo, Domenico;
7:3:17:13     First-Principles Characterization of the Critical Thickness for Forming Metallic States in Strained LaAlO3/SrTiO3(001) Heterostructure
DOI:10.1021/am506336w  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:4  AU: Nazir, Safdar;Yang, Kesong;
7:3:17:14     Influence of oxygen pressure and aging on LaAlO3 films grown by pulsed laser deposition on SrTiO3 substrates
DOI:10.1063/1.4866439  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Park, Jihwey;Soh, Yeong-Ah;Aeppli, Gabriel;David, Adrian;Lin, Weinan;Wu, Tom;
7:3:17:15     Influence of atomic termination on the LaAlO3/SrTiO3 interfacial polar rearrangement
DOI:10.1103/PhysRevB.88.035405  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Rubano, A.;Guenter, T.;Fink, T.;Paparo, D.;Marrucci, L.;Cancellieri, C.;Gariglio, S.;Triscone, J. -M.;Fiebig, M.;
7:3:17:16     Crystal-Facet-Dependent Metallization in Electrolyte-Gated Rutile TiO2 Single Crystals
DOI:10.1021/nn403340d  JN:ACS NANO  PY:2013
  TC:8  AU: Schladt, Thomas D.;Graf, Tanja;Aetukuri, Nagaphani B.;Li, Mingyang;Fantini, Andrea;Jiang, Xin;Samant, Mahesh G.;Parkin, Stuart S. P.;
7:3:17:17     Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from second harmonic generation
DOI:10.1103/PhysRevB.86.235418  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;
7:3:17:18     Spectral and spatial distribution of polarization at the LaAlO3/SrTiO3 interface (vol 83, 155405, 2011)
DOI:10.1103/PhysRevB.83.159906  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Rubano, A.;Fiebig, M.;Paparo, D.;Marino, A.;Maccariello, D.;di Uccio, U. Scotti;Granozio, F. Miletto;Marrucci, L.;Richter, C.;Paetel, S.;Mannhart, J.;
7:3:17:19     Electronic states at polar/nonpolar interfaces grown on SrTiO3 studied by optical second harmonic generation
DOI:10.1103/PhysRevB.88.245434  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:3:18:1     Identification of A- and B-Site Cation Vacancy Defects in Perovskite Oxide Thin Films
DOI:10.1103/PhysRevLett.105.226102  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:32  AU: Keeble, D. J.;Wicklein, S.;Dittmann, R.;Ravelli, L.;Mackie, R. A.;Egger, W.;
7:3:18:2     Interplay between intrinsic defects, doping, and free carrier concentration in SrTiO3 thin films
DOI:10.1103/PhysRevB.85.195460  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Ertekin, Elif;Srinivasan, Varadharajan;Ravichandran, Jayakanth;Rossen, Pim B.;Siemons, Wolter;Majumdar, Arun;Ramesh, Ramamoorthy;Grossman, Jeffrey C.;
7:3:18:3     Defect-Mediated Polarization Switching in Ferroelectrics and Related Materials: From Mesoscopic Mechanisms to Atomistic Control
DOI:10.1002/adma.200900813  JN:ADVANCED MATERIALS  PY:2010
  TC:29  AU: Kalinin, Sergei V.;Rodriguez, Brian J.;Borisevich, Albina Y.;Baddorf, Arthur P.;Balke, Nina;Chang, Hye Jung;Chen, Long-Qing;Choudhury, Samrat;Jesse, Stephen;Maksymovych, Peter;Nikiforov, Maxim P.;Pennycook, Stephen J.;
7:3:18:4     Nonstoichiometry accommodation in SrTiO3 thin films studied by positron annihilation and electron microscopy
DOI:10.1103/PhysRevB.87.195409  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Keeble, D. J.;Wicklein, S.;Jin, L.;Jia, C. L.;Egger, W.;Dittmann, R.;
7:3:18:5     Surface Octahedral Distortions and Atomic Design of Perovskite Interfaces
DOI:10.1002/adma.201301841  JN:ADVANCED MATERIALS  PY:2013
  TC:4  AU: Petrov, A. Yu.;Torrelles, X.;Verna, A.;Xu, H.;Cossaro, A.;Pedio, M.;Garcia-Barriocanal, J.;Castro, G. R.;Davidson, B. A.;
7:3:18:6     Thermal conductivity as a metric for the crystalline quality of SrTiO3 epitaxial layers
DOI:10.1063/1.3579993  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:22  AU: Oh, Dong-Wook;Ravichandran, Jayakanth;Liang, Chen-Wei;Siemons, Wolter;Jalan, Bharat;Brooks, Charles M.;Huijben, Mark;Schlom, Darrell G.;Stemmer, Susanne;Martin, Lane W.;Majumdar, Arun;Ramesh, Ramamoorthy;Cahill, David G.;
7:3:18:7     Dramatic mobility enhancements in doped SrTiO3 thin films by defect management
DOI:10.1063/1.3457994  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Kozuka, Y.;Hikita, Y.;Bell, C.;Hwang, H. Y.;
7:3:18:8     Surface and Defect Structure of Oxide Nanowires on SrTiO3
DOI:10.1103/PhysRevLett.107.086102  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:14  AU: Marshall, Matthew S. J.;Becerra-Toledo, Andres E.;Marks, Laurence D.;Castell, Martin R.;
7:3:18:9     Persistent Photoconductivity in Strontium Titanate
DOI:10.1103/PhysRevLett.111.187403  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Tarun, Marianne C.;Selim, Farida A.;McCluskey, Matthew D.;
7:3:18:10     Identification of vacancy defects in a thin film perovskite oxide
DOI:10.1103/PhysRevB.81.064102  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Keeble, D. J.;Mackie, R. A.;Egger, W.;Loewe, B.;Pikart, P.;Hugenschmidt, C.;Jackson, T. J.;
7:3:18:11     Stoichiometry of SrTiO3 films grown by pulsed laser deposition
DOI:10.1063/1.4717984  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Liu, G. Z.;Lei, Q. Y.;Xi, X. X.;
7:3:18:12     Suppression of vacancy defects in epitaxial La-doped SrTiO3 films
DOI:10.1063/1.3664398  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Keeble, D. J.;Jalan, B.;Ravelli, L.;Egger, W.;Kanda, G.;Stemmer, S.;
7:3:18:13     Controlled cation stoichiometry in pulsed laser deposition-grown BaTiO3 epitaxial thin films with laser fluence
DOI:10.1063/1.3628461  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Kan, Daisuke;Shimakawa, Yuichi;
7:3:18:14     Hybrid functional calculations of point defects and hydrogen in SrZrO3
DOI:10.1103/PhysRevB.89.184109  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Weston, L.;Janotti, A.;Cui, X. Y.;Stampfl, C.;Van de Walle, C. G.;
7:3:18:15     Vacancy defects in PbTiO3 and lanthanide-ion-doped PbTiO3: A study of positron lifetimes
DOI:10.1103/PhysRevB.82.024113  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Mackie, R. A.;Pelaiz-Barranco, A.;Keeble, D. J.;
7:3:18:16     Delta-doped epitaxial La:SrTiO3 field-effect transistor
DOI:10.1063/1.3600782  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Nishio, K.;Matvejeff, M.;Takahashi, R.;Lippmaa, M.;Sumiya, M.;Yoshikawa, H.;Kobayashi, K.;Yamashita, Y.;
7:3:18:17     Structural Characterization of Homoepitaxial SrTiO3 Films Grown by Pulsed Laser Deposition
DOI:10.1080/10584587.2013.780142  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Lei, Q. Y.;Liu, G. Z.;Xi, X. X.;
7:3:18:18     Study of defects in an electroresistive Au/La(2/3)Sr(1/3)MnO(3)/SrTiO(3)(001) heterostructure by positron annihilation
DOI:10.1063/1.3631825  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Ferragut, R.;Dupaquier, A.;Brivio, S.;Bertacco, R.;Egger, W.;
7:3:18:19     Confined high-mobility electron gas at the Ruddlesden-Popper type heterointerfaces
DOI:10.1063/1.3552681  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Matvejeff, M.;Nishio, K.;Takahashi, R.;Lippmaa, M.;
7:3:18:20     Interplay of point defects, biaxial strain, and thermal conductivity in homoepitaxial SrTiO3 thin films
DOI:10.1063/1.3682300  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Wiedigen, S.;Kramer, T.;Feuchter, M.;Knorr, I.;Nee, N.;Hoffmann, J.;Kamlah, M.;Volkert, C. A.;Jooss, Ch;
7:3:18:21     Incorporation of lanthanide ions in lead titanate
DOI:10.1007/s10853-011-5900-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:3  AU: Pelaiz-Barranco, A.;Mendez-Gonzalez, Y.;Arnold, D. C.;Saint-Gregoire, P.;Keeble, D. J.;
7:3:18:22     Quantitative determination of energy enhanced interlayer transport in pulsed laser deposition of SrTiO3
DOI:10.1103/PhysRevB.84.195467  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Eres, Gyula;Tischler, J. Z.;Rouleau, C. M.;Zschack, P.;Christen, H. M.;Larson, B. C.;
7:3:18:23     Thermally stimulated processes in samarium-modified lead titanate ferroelectric ceramics
DOI:10.1007/s00339-012-7421-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:0  AU: Pelaiz-Barranco, A.;Garcia-Wong, A. C.;Gonzalez-Abreu, Y.;Gagou, Y.;Saint-Gregoire, P.;
7:3:18:24     Interstitial and substitutional zirconium in SrTiO3
DOI:10.1016/j.commatsci.2011.08.023  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:5  AU: Jaffe, John E.;Van Ginhoven, Renee M.;Jiang, Weilin;
7:3:18:25     Surface and Defect Structure of Oxide Nanowires on SrTiO3 (vol 107, 086102, 2011)
DOI:10.1103/PhysRevLett.107.139901  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:0  AU: Marshall, Matthew S. J.;Becerra-Toledo, Andres E.;Marks, Laurence D.;Castell, Martin R.;
7:3:19:1     Epitaxial Growth and Properties of Doped Transition Metal and Complex Oxide Films
DOI:10.1002/adma.200901867  JN:ADVANCED MATERIALS  PY:2010
  TC:94  AU: Chambers, Scott A.;
7:3:19:2     Band Gap and Edge Engineering via Ferroic Distortion and Anisotropic Strain: The Case of SrTiO3
DOI:10.1103/PhysRevLett.107.146804  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:30  AU: Berger, Robert F.;Fennie, Craig J.;Neaton, Jeffrey B.;
7:3:19:3     The Impacts of Cation Stoichiometry and Substrate Surface Quality on Nucleation, Structure, Defect Formation, and Intermixing in Complex Oxide Heteroepitaxy-LaCrO3 on SrTiO3(001)
DOI:10.1002/adfm.201202655  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:15  AU: Qiao, L.;Zhang, K. H. L.;Bowden, M. E.;Varga, T.;Shutthanandan, V.;Colby, R.;Du, Y.;Kabius, B.;Sushko, P. V.;Biegalski, M. D.;Chambers, S. A.;
7:3:19:4     Band-Gap Reduction and Dopant Interaction in Epitaxial La,Cr Co-doped SrTiO3 Thin Films
DOI:10.1021/cm503541u  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:6  AU: Comes, Ryan B.;Sushko, Peter V.;Heald, Steve M.;Colby, Robert J.;Bowden, Mark E.;Chambers, Scott A.;
7:3:19:5     The impact of crystal symmetry on the electronic structure and functional properties of complex lanthanum chromium oxides
DOI:10.1039/c3tc30883a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:9  AU: Qiao, L.;Xiao, H. Y.;Heald, S. M.;Bowden, M. E.;Varga, T.;Exarhos, G. J.;Biegalski, M. D.;Ivanov, I. N.;Weber, W. J.;Droubay, T. C.;Chambers, S. A.;
7:3:19:6     Band Alignment, Built-In Potential, and the Absence of Conductivity at the LaCrO3/SrTiO3(001) Heterojunction
DOI:10.1103/PhysRevLett.107.206802  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:17  AU: Chambers, S. A.;Qiao, L.;Droubay, T. C.;Kaspar, T. C.;Arey, B. W.;Sushko, P. V.;
7:3:19:7     Cation intermixing and electronic deviations at the insulating LaCrO3/SrTiO3(001) interface
DOI:10.1103/PhysRevB.88.155325  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Colby, R.;Qiao, L.;Zhang, K. H. L.;Shutthanandan, V.;Ciston, J.;Kabius, B.;Chambers, S. A.;
7:3:19:8     LaCrO3 heteroepitaxy on SrTiO3(001) by molecular beam epitaxy
DOI:10.1063/1.3624473  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Qiao, L.;Droubay, T. C.;Bowden, M. E.;Shutthanandan, V.;Kaspar, T. C.;Chambers, S. A.;
7:3:19:9     Effect of cation arrangement on the electronic structures of the perovskite solid solutions (SrTiO3)(1-x)(LaCrO3)(x) from first principles
DOI:10.1103/PhysRevB.90.045119  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Chen, Hungru;Umezawa, Naoto;
7:3:19:10     Memory diodes with nonzero crossing
DOI:10.1063/1.4775673  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Saraf, Shimon;Markovich, Miri;Vincent, Tracey;Rechter, Roman;Rothschild, Avner;
7:3:19:11     Defect chemistry of pn junctions in complex oxides
DOI:10.1103/PhysRevB.82.245208  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Saraf, Shimon;Markovich, Miri;Rothschild, Avner;
7:3:19:12     Multiband Optical Absorption Controlled by Lattice Strain in Thin-Film LaCrO3
DOI:10.1103/PhysRevLett.110.077401  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Sushko, Peter V.;Qiao, Liang;Bowden, Mark;Varga, Tamas;Exarhos, Gregory J.;Urban, Frank K., III;Barton, David;Chambers, Scott A.;
7:3:19:13     Epitaxial growth of Nb-doped SrTiO3 films by pulsed laser deposition
DOI:10.1016/j.apsusc.2012.02.041  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:3  AU: Markovich, M.;Roqueta, J.;Santiso, J.;Lakin, E.;Zolotoyabko, E.;Rothschild, A.;
7:3:20:1     Elastic strain engineering of ferroic oxides
DOI:10.1557/mrs.2014.1  JN:MRS BULLETIN  PY:2014
  TC:25  AU: Schlom, Darrell G.;Chen, Long-Qing;Fennie, Craig J.;Gopalan, Venkatraman;Muller, David A.;Pan, Xiaoqing;Ramesh, Ramamoorthy;Uecker, Reinhard;
7:3:20:2     Atomically Defined Rare-Earth Scandate Crystal Surfaces
DOI:10.1002/adfm.201000889  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:39  AU: Kleibeuker, Josee E.;Koster, Gertjan;Siemons, Wolter;Dubbink, David;Kuiper, Bouwe;Blok, Jeroen L.;Yang, Chan-Ho;Ravichandran, Jayakanth;Ramesh, Ramamoorthy;ten Elshof, Johan E.;Blank, Dave H. A.;Rijnders, Guus;
7:3:20:3     Universal Ti-rich termination of atomically flat SrTiO3 (001), (110), and (111) surfaces
DOI:10.1063/1.3549860  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:33  AU: Biswas, A.;Rossen, P. B.;Yang, C. -H.;Siemons, W.;Jung, M. -H.;Yang, I. K.;Ramesh, R.;Jeong, Y. H.;
7:3:20:4     Metal insulator transitions in perovskite SrIrO3 thin films
DOI:10.1063/1.4903314  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:6  AU: Biswas, Abhijit;Kim, Ki-Seok;Jeong, Yoon Hee;
7:3:20:5     Preparation of atomically flat SrTiO3 surfaces using a deionized-water leaching and thermal annealing procedure
DOI:10.1063/1.4773052  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Connell, J. G.;Isaac, B. J.;Ekanayake, G. B.;Strachan, D. R.;Seo, S. S. A.;
7:3:20:6     Morphology control of Fe films using ordered termination on SrTiO3 surfaces
DOI:10.1063/1.3679177  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Chien, TeYu;Freeland, John W.;Guisinger, Nathan P.;
7:3:20:7     Cross-Sectional Scanning Tunneling Microscopy Applied to Complex Oxide Interfaces
DOI:10.1002/adfm.201203430  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:2  AU: Chien, Te Yu;Chakhalian, Jak;Freeland, John W.;Guisinger, Nathan P.;
7:3:20:8     Epitaxial oxide growth on polar (111) surfaces
DOI:10.1063/1.3652701  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Blok, J. L.;Wan, X.;Koster, G.;Blank, D. H. A.;Rijnders, G.;
7:3:20:9     Nanoscale Laterally Modulated Properties of Oxide Ultrathin Films by Substrate Termination Replica through Layer-by-Layer Growth
DOI:10.1021/cm302444s  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:3  AU: Ocal, Carmen;Bachelet, Romain;Garzon, Luis;Stengel, Massimiliano;Sanchez, Florencio;Fontcuberta, Josep;
7:3:20:10     Structure of singly terminated polar DyScO3 (110) surfaces
DOI:10.1103/PhysRevB.85.165413  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Kleibeuker, J. E.;Kuiper, B.;Harkema, S.;Blank, D. H. A.;Koster, G.;Rijnders, G.;Tinnemans, P.;Vlieg, E.;Rossen, P. B.;Siemons, W.;Portale, G.;Ravichandran, J.;Szepieniec, J. M.;Ramesh, R.;
7:3:20:11     Achieving A-Site Termination on La0.18Sr0.82Al0.59Ta0.41O3 Substrates
DOI:10.1002/adma.200904328  JN:ADVANCED MATERIALS  PY:2010
  TC:9  AU: Ngai, Joseph H.;Schwendemann, Todd C.;Walker, Anna E.;Segal, Yaron;Walker, Fred J.;Altman, Eric I.;Ahn, Charles H.;
7:3:20:12     Selective A- or B-site single termination on surfaces of layered oxide SrLaAlO4
DOI:10.1063/1.4790575  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Biswas, A.;Rossen, P. B.;Ravichandran, J.;Chu, Y. -H.;Lee, Y. -W.;Yang, C. -H.;Ramesh, R.;Jeong, Y. H.;
7:3:20:13     Water adsorption and dissociation on SrTiO3(001) revisited: A density functional theory study
DOI:10.1103/PhysRevB.81.155455  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Guhl, Hannes;Miller, Wolfram;Reuter, Karsten;
7:3:20:14     Realization of single-termination SrTiO3 (100) surfaces by a microwave-induced hydrothermal process
DOI:10.1063/1.4831681  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Velasco-Davalos, Ivan;Thomas, Reji;Ruediger, Andreas;
7:3:20:15     Conducted growth of SrRuO3 nanodot arrays on self-ordered La0.18Sr0.82Al0.59Ta0.41O3(001) surfaces
DOI:10.1063/1.3622140  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Bachelet, R.;Ocal, C.;Garzon, L.;Fontcuberta, J.;Sanchez, F.;
7:3:20:16     First-principles investigations of electronic and magnetic properties of SrTiO3 (001) surfaces with adsorbed ethanol and acetone molecules
DOI:10.1103/PhysRevB.83.195428  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Adeagbo, Waheed A.;Fischer, Guntram;Hergert, Wolfram;
7:3:20:17     Survey of fractured SrTiO3 surfaces: From the micrometer to nanometer scale
DOI:10.1116/1.3420395  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2010
  TC:4  AU: Chien, TeYu;Guisinger, Nathan P.;Freeland, John W.;
7:3:20:18     Morphological studies of Ni clusters on SrTiO3 (001) and (110)
DOI:10.1016/j.apsusc.2014.05.061  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Tanaka, Miyoko;
7:3:21:1     Epitaxial Nature and Transport Properties in (LaBa)Co2O5+delta Thin Films
DOI:10.1021/cm901479g  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:33  AU: Liu, Jian;Liu, Ming;Collins, Gregory;Chen, Chonglin;Jiang, Xuening;Gong, Wenquan;Jacobson, Allan J.;He, Jie;Jiang, Jiechao;Meletis, Efstathios I.;
7:3:21:2     Giant Magnetoresistance and Anomalous Magnetic Properties of Highly Epitaxial Ferromagnetic LaBaCo2O5.5+delta Thin Films on (001) MgO
DOI:10.1021/am301427c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:12  AU: Liu, Ming;Ma, Chunrui;Liu, Jian;Collins, Gregory;Chen, Chonglin;He, Jie;Jiang, Jiechao;Meletis, Efstathios I.;Sun, Li;Jacobson, Allan J.;Whangbo, Myung-Hwan;
7:3:21:3     Magnetic and transport properties of epitaxial (LaBa)Co2O5.5+delta thin films on (001) SrTiO3
DOI:10.1063/1.3378877  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Liu, M.;Liu, J.;Collins, G.;Ma, C. R.;Chen, C. L.;He, J.;Jiang, J. C.;Meletis, E. I.;Jacobson, A. J.;Zhang, Q. Y.;
7:3:21:4     Interface Effects on the Electronic Transport Properties in Highly Epitaxial LaBaCo2O5.5+delta Films
DOI:10.1021/am404951v  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:5  AU: Ma, C. R.;Liu, M.;Liu, J.;Collins, G.;Zhang, Y. M.;Wang, H. B.;Chen, C. L.;Lin, Y.;He, J.;Jiang, J. C.;Meletis, E. I.;Jacobson, A. J.;
7:3:21:5     Thickness effects on the magnetic and electrical transport properties of highly epitaxial LaBaCo2O5.5+delta thin films on MgO substrates
DOI:10.1063/1.4734386  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:12  AU: Ma, Chunrui;Liu, Ming;Collins, Gregory;Liu, Jian;Zhang, Yamei;Chen, Chonglin;He, Jie;Jiang, Jiechao;Meletis, Efstathios I.;
7:3:21:6     Magnetic and Electrical Transport Properties of LaBaCo2O5.5+delta Thin Films on Vicinal (001) SrTiO3 Surfaces
DOI:10.1021/am302553y  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:11  AU: Ma, Chunrui;Liu, Ming;Collins, Gregory;Wang, Haibin;Bao, Shanyong;Xu, Xing;Enriquez, Erik;Chen, Chonglin;Lin, Yuan;Whangbo, Myung-Hwan;
7:3:21:7     PO2 dependant resistance switch effect in highly epitaxial (LaBa)Co2O5+delta thin films
DOI:10.1063/1.3484964  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Liu, Jian;Collins, Gregory;Liu, Ming;Chen, C. L.;Jiang, Jiechao;Meletis, Efsftathios I.;Zhang, Qingyu;Dong, Chuang;
7:3:21:8     Step Terrace Tuned Anisotropic Transport Properties of Highly Epitaxial LaBaCo2O5.5+delta Thin Films on Vicinal SrTiO3 Substrates
DOI:10.1021/am500422j  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:4  AU: Zou, Q.;Liu, M.;Wang, G. Q.;Lu, H. L.;Yang, T. Z.;Guo, H. M.;Ma, C. R.;Xu, X.;Zhang, M. H.;Jiang, J. C.;Meletis, E. I.;Lin, Y.;Gao, H. J.;Chen, C. L.;
7:3:21:9     Nanodomain induced anomalous magnetic and electronic transport properties of LaBaCo2O5.5+delta highly epitaxial thin films
DOI:10.1063/1.4861406  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Ruiz-Zepeda, F.;Ma, C.;Uribe, D. Bahena;Cantu-Valle, J.;Wang, H.;Xu, Xing;Yacaman, M. J.;Chen, C.;Lorenz, B.;Jacobson, A. J.;Chu, P. C. W.;Ponce, A.;
7:3:21:10     Strain-Induced Anisotropic Transport Properties of LaBaCo2O5.5+delta Thin Films on NdGaO3 Substrates
DOI:10.1021/am502448k  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:3  AU: Liu, Ming;Zou, Qiang;Ma, Chunrui;Collins, Greg;Mi, Shao-Bo;Jia, Chun-Lin;Guo, Haiming;Gao, Hongjun;Chen, Chonglin;
7:3:21:11     Ultrafast chemical dynamic behavior in highly epitaxial LaBaCo2O5+delta thin films
DOI:10.1039/c4tc00492b  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:1  AU: Wang, H. B.;Bao, S. Y.;Liu, J.;Collins, G.;Ma, C. R.;Liu, M.;Chen, C. L.;Dong, C.;Whangbo, M. -H.;Guo, H. M.;Gao, H. J.;
7:3:21:12     Magnetic and electrical transport properties of LaBaCo2O5.5+delta thin films directly integrated on Si (001)
DOI:10.1016/j.matlet.2013.07.013  JN:MATERIALS LETTERS  PY:2013
  TC:0  AU: Liu, Ming;Ma, Chunrui;Collins, Gregory;Liu, Jian;Zhang, Yamei;Wang, Haibin;Chen, Chonglin;
7:3:21:13     Superfast oxygen exchange kinetics on highly epitaxial LaBaCo2O5+delta thin films for intermediate temperature solid oxide fuel cells
DOI:10.1063/1.4820363  JN:APL MATERIALS  PY:2013
  TC:3  AU: Liu, Jian;Collins, Gregory;Liu, Ming;Chen, Chonglin;
7:3:21:14     Self-patterned Nano Structures in Structurally Gradient Epitaxial La0.5Ba0.5CoO3 Films
DOI:10.1016/j.tsf.2011.02.015  JN:THIN SOLID FILMS  PY:2011
  TC:9  AU: He, Jie;Jiang, Jiechao;Liu, Jian;Liu, Ming;Collins, Greg;Ma, Chunrui;Chen, Chonglin;Meletis, Efstathios I.;
7:3:21:15     The ordered double perovskite PrBaCo2O6: Synthesis, structure, and magnetism
DOI:10.1063/1.4812368  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Seikh, Md Motin;Pralong, V.;Lebedev, O. I.;Caignaert, V.;Raveau, B.;
7:3:21:16     Strain relaxation in epitaxial SrRuO3 thin films on LaAlO3 substrates
DOI:10.1063/1.4823593  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Gao, M.;Du, H.;Ma, C. R.;Liu, M.;Collins, G.;Zhang, Y. M.;Dai, C.;Chen, C. L.;Lin, Y.;
7:3:21:17     Surface-Step-Terrace-Induced Anomalous Transport Properties in Highly Epitaxial La0.67Ca0.33MnO3 Thin Films
DOI:10.1021/am100542n  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2010
  TC:4  AU: Lu, Hongliang;Zhang, Chendong;Guo, Haiming;Gao, Hongjun;Liu, Ming;Liu, Jian;Collins, Gregery;Chen, Chonglin;
7:3:21:18     Effect of oxygen content on magnetic properties of layered cobaltites PrBaCo(2)O(5+delta)
DOI:10.1063/1.3633521  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Ganorkar, Shraddha;Priolkar, K. R.;Sarode, P. R.;Banerjee, A.;
7:3:21:19     Interface Engineered Ferroelectric BaTiO3//SrTiO3 Heterostructures with Anomalous Clamped Polarization on Si (100)
DOI:10.1080/10584587.2011.616420  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:3  AU: Liu, Ming;Collins, Greg;Silva, Emmaul;Ma, Chunrui;Liu, Jian;Chen, Chonglin;He, Jie;Jiang, Jiechao;Meletis, Efstathios I.;Qu, Shengwei;Zhang, Qingyu;Bhalla, Amma;
7:3:21:20     Layered PrBaCo2O5+delta perovskite as a cathode for proton-conducting solid oxide fuel cells
DOI:10.1016/j.jallcom.2010.01.040  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Jin, Meifang;Zhang, Xiuling;Qiu, Yu'e;Sheng, Jianmin;
7:3:21:21     Effect of substrate orientation on charge ordering behavior in Sm0.5Ca0.5MnO3 epitaxial films
DOI:10.1016/j.matlet.2012.12.097  JN:MATERIALS LETTERS  PY:2013
  TC:4  AU: Li, C. Y.;Wang, Y. Q.;Cai, R. S.;Chen, Y. Z.;Sun, J. R.;
7:3:21:22     Magnetic and electronic properties of Eu(0.9)Ca(0.1)BaCo(2)O(5.5+delta) with the variation of oxygen stoichiometry
DOI:10.1063/1.3587235  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Seikh, Md Motin;Kundu, Asish K.;Caignaert, V.;Pralong, V.;Raveau, B.;
7:3:21:23     Epitaxial growth in heterogeneous nucleation of pure aluminum
DOI:10.1016/j.matlet.2014.06.051  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Yang, L.;Xia, M.;Li, J. G.;
7:3:22:1     High bias anomaly in YBa2Cu3O7-x/LaMnO3+delta/YBa2Cu3O7-x superconductor/ferromagnetic insulator/superconductor junctions: Evidence for a long-range superconducting proximity effect through the conduction band of a ferromagnetic insulator
DOI:10.1103/PhysRevB.87.134520  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Golod, T.;Rydh, A.;Krasnov, V. M.;Marozau, I.;Uribe-Laverde, M. A.;Satapathy, D. K.;Wagner, Th.;Bernhard, C.;
7:3:22:2     Magnetic Proximity Effect in YBa2Cu3O7/La2/3Ca1/3MnO3 and YBa2Cu3O7/LaMnO3+delta Superlattices
DOI:10.1103/PhysRevLett.108.197201  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:29  AU: Satapathy, D. K.;Uribe-Laverde, M. A.;Marozau, I.;Malik, V. K.;Das, S.;Wagner, Th.;Marcelot, C.;Stahn, J.;Brueck, S.;Ruehm, A.;Macke, S.;Tietze, T.;Goering, E.;Frano, A.;Kim, J. -H.;Wu, M.;Benckiser, E.;Keimer, B.;Devishvili, A.;Toperverg, B. P.;Merz, M.;Nagel, P.;Schuppler, S.;Bernhard, C.;
7:3:22:3     Unconventional Proximity Effect and Inverse Spin-Switch Behavior in a Model Manganite-Cuprate-Manganite Trilayer System
DOI:10.1103/PhysRevLett.105.256804  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:21  AU: Salafranca, Juan;Okamoto, Satoshi;
7:3:22:4     Pulsed laser deposition growth of heteroepitaxial YBa2Cu3O7/La0.67Ca0.33MnO3 superlattices on NdGaO3 and Sr0.7La0.3Al0.65Ta0.35O3 substrates
DOI:10.1103/PhysRevB.85.054514  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Malik, V. K.;Marozau, I.;Das, S.;Doggett, B.;Satapathy, D. K.;Uribe-Laverde, M. A.;Biskup, N.;Varela, M.;Schneider, C. W.;Marcelot, C.;Stahn, J.;Bernhard, C.;
7:3:22:5     Exchange coupling and coercivity enhancement in cuprate/manganite bilayers
DOI:10.1063/1.4788719  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Ding, J. F.;Tian, Y. F.;Hu, W. J.;Lin, W. N.;Wu, T.;
7:3:22:6     Effect of Interface-Induced Exchange Fields on Cuprate-Manganite Spin Switches
DOI:10.1103/PhysRevLett.108.207205  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:8  AU: Liu, Yaohua;Visani, C.;Nemes, N. M.;Fitzsimmons, M. R.;Zhu, L. Y.;Tornos, J.;Garcia-Hernandez, M.;Zhernenkov, M.;Hoffmann, A.;Leon, C.;Santamaria, J.;te Velthuis, S. G. E.;
7:3:22:7     Emergent Spin Filter at the Interface between Ferromagnetic and Insulating Layered Oxides
DOI:10.1103/PhysRevLett.111.247203  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Liu, Yaohua;Cuellar, F. A.;Sefrioui, Z.;Freeland, J. W.;Fitzsimmons, M. R.;Leon, C.;Santamaria, J.;te Velthuis, S. G. E.;
7:3:22:8     Symmetrical interfacial reconstruction and magnetism in La0.7Ca0.3MnO3/YBa2Cu3O7/La0.7Ca0.3MnO3 heterostructures
DOI:10.1103/PhysRevB.84.060405  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Visani, C.;Tornos, J.;Nemes, N. M.;Rocci, M.;Leon, C.;Santamaria, J.;te Velthuis, S. G. E.;Liu, Yaohua;Hoffmann, A.;Freeland, J. W.;Garcia-Hernandez, M.;Fitzsimmons, M. R.;Kirby, B. J.;Varela, M.;Pennycook, S. J.;
7:3:22:9     Competition between Covalent Bonding and Charge Transfer at Complex-Oxide Interfaces
DOI:10.1103/PhysRevLett.112.196802  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:3  AU: Salafranca, Juan;Rincon, Julian;Tornos, Javier;Leon, Carlos;Santamaria, Jacobo;Dagotto, Elbio;Pennycook, Stephen J.;Varela, Maria;
7:3:22:10     YBa2Cu3O7/La0.7Ca0.3MnO3 bilayers: Interface coupling and electric transport properties
DOI:10.1103/PhysRevB.82.224509  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Werner, R.;Raisch, C.;Ruosi, A.;Davidson, B. A.;Nagel, P.;Merz, M.;Schuppler, S.;Glaser, M.;Fujii, J.;Chasse, T.;Kleiner, R.;Koelle, D.;
7:3:22:11     Depth profile of the ferromagnetic order in a YBa2Cu3O7/La2/3Ca1/3MnO3 superlattice on a LSAT substrate: A polarized neutron reflectometry study
DOI:10.1103/PhysRevB.87.115105  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Uribe-Laverde, M. A.;Satapathy, D. K.;Marozau, I.;Malik, V. K.;Das, S.;Sen, K.;Stahn, J.;Ruehm, A.;Kim, J. -H.;Keller, T.;Devishvili, A.;Toperverg, B. P.;Bernhard, C.;
7:3:22:12     Influence of La and Mn vacancies on the electronic and magnetic properties of LaMnO3 thin films grown by pulsed laser deposition
DOI:10.1103/PhysRevB.89.174422  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Marozau, Ivan;Das, Proloy T.;Doebeli, Max;Storey, James G.;Uribe-Laverde, Miguel A.;Das, Saikat;Wang, Chennan;Roessle, Matthias;Bernhard, Christian;
7:3:22:13     Interfacial electronic and magnetic properties of a Y0.6Pr0.4Ba2Cu3O7/La2/3Ca1/3MnO3 superlattice
DOI:10.1103/PhysRevB.84.092506  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Liu, Jian;Kirby, B. J.;Gray, B.;Kareev, M.;Habermeier, H. -U.;Cristiani, G.;Freeland, J. W.;Chakhalian, J.;
7:3:22:14     Structural, magnetic, and superconducting properties of pulsed-laser-deposition-grown La1.85Sr0.15CuO4/La2/3Ca1/3MnO3 superlattices on (001)-oriented LaSrAlO4 substrates
DOI:10.1103/PhysRevB.89.094511  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Das, S.;Sen, K.;Marozau, I.;Uribe-Laverde, M. A.;Biskup, N.;Varela, M.;Khaydukov, Y.;Soltwedel, O.;Keller, T.;Doebeli, M.;Schneider, C. W.;Bernhard, C.;
7:3:22:15     Attenuation of superconductivity in manganite/cuprate heterostructures by epitaxially-induced CuO intergrowths
DOI:10.1063/1.4813840  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Zhang, H.;Gauquelin, N.;Botton, G. A.;Wei, J. Y. T.;
7:3:22:16     Thermoelectric properties of YBa2Cu3O7-delta-La2/3Ca1/3MnO3 superlattices
DOI:10.1063/1.4754707  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Heinze, S.;Habermeier, H. -U.;Cristiani, G.;Canosa, S. Blanco;Le Tacon, M.;Keimer, B.;
7:3:22:17     Exchange Field-Mediated Magnetoresistance in the Correlated Insulator Phase of Be films
DOI:10.1103/PhysRevLett.109.147207  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:1  AU: Liu, T. J.;Prestigiacomo, J. C.;Xiong, Y. M.;Adams, P. W.;
7:3:22:18     Measurement of Magnetic Exchange in Ferromagnet-Superconductor La2/3Ca1/3MnO3/YBa2Cu3O7 Bilayers
DOI:10.1103/PhysRevLett.109.137005  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:4  AU: Giblin, S. R.;Taylor, J. W.;Duffy, J. A.;Butchers, M. W.;Utfeld, C.;Dugdale, S. B.;Nakamura, T.;Visani, C.;Santamaria, J.;
7:3:22:19     Electric-field-induced domain switching in the charge/orbital-ordered state of manganite La0.5Sr1.5MnO4
DOI:10.1103/PhysRevB.81.140102  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Murakami, Y.;Konno, S.;Arima, T.;Shindo, D.;Suzuki, T.;
7:3:22:20     Electron sampling depth and saturation effects in perovskite films investigated by soft x-ray absorption spectroscopy
DOI:10.1103/PhysRevB.90.125120  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ruosi, A.;Raisch, C.;Verna, A.;Werner, R.;Davidson, B. A.;Fujii, J.;Kleiner, R.;Koelle, D.;
7:3:22:21     Magnetoresistance and Ferromagnetism in Disordered LaCu0.5Mn0.5O3 Perovskite
DOI:10.1021/cm400655x  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:1  AU: Cortes-Gil, Raquel;Luisa Ruiz-Gonzalez, M.;Alonso, Jose M.;Garcia-Hernandez, Mar;Hernando, Antonio;Gonzalez-Calbet, Jose M.;
7:3:22:22     Polarized neutron reflectometry study of the magnetization reversal process in YBa2Cu3O7/La2/3Ca1/3MnO3 superlattices grown on SrTiO3 substrates
DOI:10.1103/PhysRevB.82.174439  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Hoppler, J.;Fritzsche, H.;Malik, V. K.;Stahn, J.;Cristiani, G.;Habermeier, H. -U.;Roessle, M.;Honolka, J.;Enders, A.;Bernhard, C.;
7:3:22:23     Electric-field-induced domain switching in the charge/orbital-ordered state of manganite La0.5Sr1.5MnO4 (vol 81, 140102, 2010)
DOI:10.1103/PhysRevB.82.029903  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Murakami, Y.;Konno, S.;Arima, T.;Shindo, D.;Suzuki, T.;
7:3:22:24     Competition between Covalent Bonding and Charge Transfer at Complex-Oxide Interfaces (vol 112, 196802, 2014)
DOI:10.1103/PhysRevLett.113.189902  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Salafranca, Juan;Rincon, Julian;Tornos, Javier;Leon, Carlos;Santamaria, Jacobo;Dagotto, Elbio;Pennycook, Stephen J.;Varela, Maria;
7:3:23:1     Surface electronic structure for various surface preparations of Nb-doped SrTiO3 (001)
DOI:10.1063/1.4821095  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Hatch, Richard C.;Fredrickson, Kurt D.;Choi, Miri;Lin, Chungwei;Seo, Hosung;Posadas, Agham B.;Demkov, Alexander A.;
7:3:23:2     Electronic structure of oxygen vacancies in SrTiO3 and LaAlO3
DOI:10.1103/PhysRevB.86.155105  JN:PHYSICAL REVIEW B  PY:2012
  TC:20  AU: Mitra, C.;Lin, C.;Robertson, J.;Demkov, Alexander A.;
7:3:23:3     Electron Correlation in Oxygen Vacancy in SrTiO3
DOI:10.1103/PhysRevLett.111.217601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:8  AU: Lin, Chungwei;Demkov, Alexander A.;
7:3:23:4     Orbital ordering under reduced symmetry in transition metal perovskites: Oxygen vacancy in SrTiO3
DOI:10.1103/PhysRevB.86.161102  JN:PHYSICAL REVIEW B  PY:2012
  TC:13  AU: Lin, Chungwei;Mitra, Chandrima;Demkov, Alexander A.;
7:3:23:5     First-principles insights on the magnetism of cubic SrTi1-xCoxO3-delta
DOI:10.1063/1.4729830  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Florez, J. M.;Ong, S. P.;Onbasli, M. C.;Dionne, G. F.;Vargas, P.;Ceder, G.;Ross, C. A.;
7:3:23:6     Anti-ferrodistortive-Like Oxygen-Octahedron Rotation Induced by the Oxygen Vacancy in Cubic SrTiO3
DOI:10.1002/adma.201203580  JN:ADVANCED MATERIALS  PY:2013
  TC:20  AU: Choi, Minseok;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;
7:3:23:7     Bandgap engineering in perovskite oxides: Al-doped SrTiO3
DOI:10.1063/1.4824023  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Posadas, Agham B.;Lin, Chungwei;Demkov, Alexander A.;Zollner, Stefan;
7:3:23:8     Hydrogen-Induced Surface Metallization of SrTiO3(001)
DOI:10.1103/PhysRevLett.108.116802  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:16  AU: D'Angelo, M.;Yukawa, R.;Ozawa, K.;Yamamoto, S.;Hirahara, T.;Hasegawa, S.;Silly, M. G.;Sirotti, F.;Matsuda, I.;
7:3:23:9     Oxygen vacancy-mediated room-temperature ferromagnetism in insulating cobalt-substituted SrTiO3 epitaxially integrated with silicon
DOI:10.1103/PhysRevB.87.144422  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Posadas, Agham B.;Mitra, Chandrima;Lin, Chungwei;Dhamdhere, Ajit;Smith, David J.;Tsoi, Maxim;Demkov, Alexander A.;
7:3:23:10     Role of oxygen vacancies in room-temperature ferromagnetism in cobalt-substituted SrTiO3
DOI:10.1103/PhysRevB.90.125130  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Mitra, Chandrima;Lin, Chungwei;Posadas, Agham B.;Demkov, Alexander A.;
7:3:23:11     Vacancies and small polarons in SrTiO3
DOI:10.1103/PhysRevB.90.085202  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Janotti, Anderson;Varley, Joel B.;Choi, Minseok;van de Walle, Chris G.;
7:3:23:12     Assessment of Strain-Generated Oxygen Vacancies Using SrTiO3 Bicrystals
DOI:10.1021/acs.nanolett.5b01245  JN:NANO LETTERS  PY:2015
  TC:0  AU: Choi, Si-Young;Kim, Sung-Dae;Choi, Minseok;Lee, Hak-Sung;Ryu, Jungho;Shibata, Naoya;Mizoguchi, Teruyasu;Tochigi, Eita;Yamamoto, Takahisa;Kang, Suk-Joong L.;Ikuhara, Yuichi;
7:3:23:13     Electronic structure of the hydrogen-adsorbed SrTiO3(001) surface studied by polarization-dependent photoemission spectroscopy
DOI:10.1103/PhysRevB.87.115314  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Yukawa, R.;Yamamoto, S.;Ozawa, K.;D'Angelo, M.;Ogawa, M.;Silly, M. G.;Sirotti, F.;Matsuda, I.;
7:3:23:14     Metal-induced charge transfer, structural distortion, and orbital order in SrTiO3 thin films
DOI:10.1103/PhysRevB.87.165103  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Lee, Jaekwang;Lin, Chungwei;Demkov, Alexander A.;
7:3:23:15     Enhancement of the magneto-optical performance of Sr(Ti0.6-xGaxFe0.4)O-3 perovskite films by Ga substitution
DOI:10.1063/1.3595337  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Jiang, Peng;Bi, Lei;Kim, Dong Hun;Dionne, G. F.;Ross, C. A.;
7:3:23:16     Raman scattering and room temperature ferromagnetism in Co-doped SrTiO3 particles
DOI:10.1016/j.apsusc.2011.04.039  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:8  AU: Yao, Dongsheng;Zhou, Xueyun;Ge, Shihui;
7:3:23:17     SrTiO3: From Quantum Paraelectric to Superconducting
DOI:10.1080/00150193.2010.505528  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Bussmann-Holder, A.;Bishop, A. R.;Simon, A.;
7:3:23:18     Electrical Properties and Dimensional Stability of Ce-Doped SrTiO3-delta for Solid Oxide Fuel Cell Applications
DOI:10.1111/j.1551-2916.2011.04483.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Cumming, Denis J.;Kharton, Vladislav V.;Yaremchenko, Aleksey A.;Kovalevsky, Andrei V.;Kilner, John A.;
7:3:23:19     Spectral origins of high Faraday rotation at 1.5-mu m wavelength from Fe and Co in SrTiO3 films
DOI:10.1063/1.3562260  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Dionne, Gerald F.;Bi, Lei;Kim, H. -S.;Ross, C. A.;
7:3:24:1     Tailoring Magnetic Interlayer Coupling in La0.7Sr0.3MnO3/SrRuO3 Superlattices
DOI:10.1103/PhysRevLett.104.167203  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:50  AU: Ziese, M.;Vrejoiu, I.;Pippel, E.;Esquinazi, P.;Hesse, D.;Etz, C.;Henk, J.;Ernst, A.;Maznichenko, I. V.;Hergert, W.;Mertig, I.;
7:3:24:2     Inverted hysteresis and giant exchange bias in La0.7Sr0.3MnO3/SrRuO3 superlattices
DOI:10.1063/1.3470101  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:29  AU: Ziese, M.;Vrejoiu, I.;Hesse, D.;
7:3:24:3     Structural symmetry and magnetocrystalline anisotropy of SrRuO3 films on SrTiO3
DOI:10.1103/PhysRevB.81.184418  JN:PHYSICAL REVIEW B  PY:2010
  TC:27  AU: Ziese, M.;Vrejoiu, I.;Hesse, D.;
7:3:24:4     Dual Antiferromagnetic Coupling at La0.67Sr0.33MnO3/SrRuO3 Interfaces
DOI:10.1103/PhysRevLett.109.027201  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:6  AU: Solignac, A.;Guerrero, R.;Gogol, P.;Maroutian, T.;Ott, F.;Largeau, L.;Lecoeur, Ph.;Pannetier-Lecoeur, M.;
7:3:24:5     Competing interactions at the interface between ferromagnetic oxides revealed by spin-polarized neutron reflectometry
DOI:10.1103/PhysRevB.86.180402  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Kim, J. -H.;Vrejoiu, I.;Khaydukov, Y.;Keller, T.;Stahn, J.;Ruehm, A.;Satapathy, D. K.;Hinkov, V.;Keimer, B.;
7:3:24:6     Resistive switching in ultra-thin La0.7Sr0.3MnO3/SrRuO3 superlattices
DOI:10.1063/1.4890865  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Jammalamadaka, S. Narayana;Vanacken, Johan;Moshchalkov, V. V.;
7:3:24:7     Tailoring the electronic properties of SrRuO3 films in SrRuO3/LaAlO3 superlattices
DOI:10.1063/1.4768230  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Liu, Z. Q.;Ming, Y.;Lu, W. M.;Huang, Z.;Wang, X.;Zhang, B. M.;Li, C. J.;Gopinadhan, K.;Zeng, S. W.;Annadi, A.;Feng, Y. P.;Venkatesan, T.;Ariando;
7:3:24:8     Magnetic properties of Pr0.7Ca0.3MnO3/SrRuO3 superlattices
DOI:10.1063/1.3572027  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Ziese, M.;Vrejoiu, I.;Pippel, E.;Nikulina, E.;Hesse, D.;
7:3:24:9     Raman spectra and magnetization of all-ferromagnetic superlattices grown on (110) oriented SrTiO3
DOI:10.1063/1.4867509  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Behera, B. C.;Ravindra, A. V.;Padhan, P.;Prellier, W.;
7:3:24:10     Exchange bias in strained SrRuO3 thin films
DOI:10.1063/1.4902312  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Sow, Chanchal;Pramanik, A. K.;Kumar, P. S. Anil;
7:3:24:11     Exchange bias in manganite/SrRuO3 superlattices
DOI:10.1063/1.4790877  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Ziese, M.;Bern, F.;Vrejoiu, I.;
7:3:24:12     Anomalous and planar Hall effect of orthorhombic and tetragonal SrRuO3 layers
DOI:10.1103/PhysRevB.84.104413  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Ziese, M.;Vrejoiu, I.;
7:3:24:13     Size effect on magnetic coupling in all-ferromagnetic superlattices
DOI:10.1063/1.3673295  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Padhan, P.;Prellier, W.;
7:3:24:14     Exchange coupling and exchange bias in La0.7Sr0.3MnO3-SrRuO3 superlattices
DOI:10.1088/0957-4484/22/25/254025  JN:NANOTECHNOLOGY  PY:2011
  TC:9  AU: Ziese, M.;Pippel, E.;Nikulina, E.;Arredondo, M.;Vrejoiu, I.;
7:3:24:15     Tailoring magnetic orders in (LaFeO(3))(n)-(LaCrO(3))(n) superlattices model
DOI:10.1063/1.3631787  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Zhu, Yangyang;Dong, Shuai;Zhang, Qinfang;Yunoki, Seiji;Wang, Yonggang;Liu, J. -M.;
7:3:24:16     Spin Structure in an Interfacially Coupled Epitaxial Ferromagnetic Oxide Heterostructure
DOI:10.1103/PhysRevLett.110.237201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Ke, X.;Belenky, L. J.;Lauter, V.;Ambaye, H.;Bark, C. W.;Eom, C. B.;Rzchowski, M. S.;
7:3:24:17     Step velocity tuning of SrRuO3 step flow growth on SrTiO3
DOI:10.1103/PhysRevB.83.193401  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Esteve, D.;Maroutian, T.;Pillard, V.;Lecoeur, Ph.;
7:3:24:18     Magnetotransport properties of La0.7Sr0.3MnO3/Nd0.6Ca0.4MnO3 superlattices up to 25 T
DOI:10.1063/1.3540656  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Pinto, S.;Pereira, A. M.;Ventura, J.;Araujo, J. P.;Hsu, D.;Lin, J. G.;
7:3:24:19     Extraordinary Hall effect in Ba1-xSrxRuO3 films
DOI:10.1103/PhysRevB.82.174430  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Kobayashi, Y.;Iwata, M.;Kaneko, T.;Sato, K.;Asai, K.;Ohsumi, H.;
7:3:24:20     Hybrid models of hysteresis for mixed hysteretic loops in heterogeneous magnetic materials
DOI:10.1063/1.4853295  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Dimian, M.;Andrei, P.;Grayson, M.;
7:3:25:1     Ferroelectricity in Strain-Free SrTiO3 Thin Films
DOI:10.1103/PhysRevLett.104.197601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:68  AU: Jang, H. W.;Kumar, A.;Denev, S.;Biegalski, M. D.;Maksymovych, P.;Bark, C. W.;Nelson, C. T.;Folkman, C. M.;Baek, S. H.;Balke, N.;Brooks, C. M.;Tenne, D. A.;Schlom, D. G.;Chen, L. Q.;Pan, X. Q.;Kalinin, S. V.;Gopalan, V.;Eom, C. B.;
7:3:25:2     Critical thickness and strain relaxation in molecular beam epitaxy-grown SrTiO3 films
DOI:10.1063/1.4833248  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Wang, Tianqi;Ganguly, Koustav;Marshall, Patrick;Xu, Peng;Jalan, Bharat;
7:3:25:3     Anisotropic manipulation of ferroelectric polarization in SrTiO3/(Co0.9Zn0.1)Fe2O4 heterostructural films by magnetic field
DOI:10.1063/1.4863144  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chen, Bo;Li, Yong-Chao;Wang, Jun-Yong;Wan, Jian-Guo;Liu, Jun-Ming;
7:3:25:4     Polar state in freestanding strontium titanate nanoparticles
DOI:10.1063/1.4894253  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Tyson, Trevor A.;Yu, Tian;Croft, Mark;Scofield, Megan E.;Bobb-Semple, Dara;Tao, Jing;Jaye, Cherno;Fischer, Daniel;Wong, Stanislaus S.;
7:3:25:5     Ferroelectricity and superparamagnetism in Sr/Ti nonstoichiometric SrTiO3
DOI:10.1103/PhysRevB.85.104108  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Guo, Y. Y.;Liu, H. M.;Yu, D. P.;Liu, J. -M.;
7:3:25:6     Nanoindentation induced piezoelectricity in SrTiO3 single crystals
DOI:10.1016/j.scriptamat.2013.11.003  JN:SCRIPTA MATERIALIA  PY:2014
  TC:3  AU: Bdikin, I.;Singh, Budhendra;Kumar, J. Suresh;Graca, M. P. F.;Balbashov, A. M.;Gracio, J.;Kholkin, A. L.;
7:3:25:7     Ferroelectricity in nonstoichiometric SrTiO3 films studied by ultraviolet Raman spectroscopy
DOI:10.1063/1.3499273  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Tenne, D. A.;Farrar, A. K.;Brooks, C. M.;Heeg, T.;Schubert, J.;Jang, H. W.;Bark, C. W.;Folkman, C. M.;Eom, C. B.;Schlom, D. G.;
7:3:25:8     Effect of stoichiometry on the dielectric properties and soft mode behavior of strained epitaxial SrTiO3 thin films on DyScO3 substrates
DOI:10.1063/1.4793649  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Lee, Che-Hui;Skoromets, Volodymyr;Biegalski, Michael D.;Lei, Shiming;Haislmaier, Ryan;Bernhagen, Margitta;Uecker, Reinhard;Xi, Xiaoxing;Gopalan, Venkatraman;Marti, Xavier;Kamba, Stanislav;Kuzel, Petr;Schlom, Darrell G.;
7:3:25:9     Role of phonon scattering by elastic strain field in thermoelectric Sr1-xYxTiO3-delta
DOI:10.1063/1.4882377  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:7  AU: Bhattacharya, S.;Dehkordi, A. Mehdizadeh;Tennakoon, S.;Adebisi, R.;Gladden, J. R.;Darroudi, T.;Alshareef, H. N.;Tritt, T. M.;
7:3:25:10     Defect-related room-temperature ferroelectricity in tensile-strained SrTiO3 thin films on GdScO3 (110) substrates
DOI:10.1063/1.3525963  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Kim, Yong Su;Choi, J. S.;Kim, J.;Moon, S. J.;Park, B. H.;Yu, J.;Kwon, J. -H.;Kim, M.;Chung, J. -S.;Noh, T. W.;Yoon, J. -G.;
7:3:25:11     Anisotropic-strain-relaxation-induced crosshatch morphology in epitaxial SrTiO3/NdGaO3 thin films
DOI:10.1063/1.4897960  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Tan, X. L.;Chen, F.;Chen, P. F.;Xu, H. R.;Chen, B. B.;Jin, F.;Gao, G. Y.;Wu, W. B.;
7:3:25:12     X-ray analysis of strain distribution in two-step grown epitaxial SrTiO3 thin films
DOI:10.1063/1.4892827  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Panomsuwan, Gasidit;Takai, Osamu;Saito, Nagahiro;
7:3:25:13     Insulators containing CuCl4X22- (X = H2O, NH3) units: Origin of the orthorhombic distortion observed only for CuCl4(H2O)(2)(2-)
DOI:10.1103/PhysRevB.85.094110  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Garcia-Fernandez, P.;Garcia-Lastra, J. M.;Trueba, A.;Barriuso, M. T.;Aramburu, J. A.;Moreno, M.;
7:3:25:14     Influence of Epitaxial Growth Orientation on Residual Strain and Dielectric Properties of (Ba0.3Sr0.7)TiO3 Films Grown on In-Plane Compressive Substrates
DOI:10.1080/00150193.2010.483391  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Yamada, T.;Kamo, T.;Su, D.;Iijima, T.;Funakubo, H.;
7:3:25:15     Temperature and electric field stabilities of dielectric and insulating properties for c-axis-oriented CaBi4Ti4O15 films
DOI:10.1063/1.4811816  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Kimura, Junichi;Takuwa, Itaru;Matsushima, Masaaki;Yasui, Shintaro;Yamada, Tomoaki;Funakubo, Hiroshi;
7:3:25:16     Anisotropic magnetic field responses of ferroelectric polarization in the trigonal multiferroic CuFe1-xAlxO2 (x=0.015)
DOI:10.1103/PhysRevB.81.014422  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Nakajima, Taro;Mitsuda, Setsuo;Kanetsuki, Shunsuke;Yamano, Motoyoshi;Iwamoto, Shunsuke;Yoshida, Yukihiko;Mitamura, Hiroyuki;Sawai, Yoshiki;Tokunaga, Masashi;Kindo, Koichi;Prokes, Karel;Podlesnyak, Andrey;
7:3:25:17     Chemically modulated multiferroicity in Dy-doped Gd2Ti2O7
DOI:10.1063/1.4794129  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Lin, L.;Zhao, Z. Y.;Liu, D.;Xie, Y. L.;Dong, S.;Yan, Z. B.;Liu, J. -M.;
7:3:25:18     OXIDE INTERFACES Streaks of conduction
DOI:10.1038/nmat3820  JN:NATURE MATERIALS  PY:2013
  TC:1  AU: Brinkman, Alexander;
7:3:26:1     "Charge Leakage" at LaMnO3/SrTiO3 Interfaces
DOI:10.1002/adma.200902263  JN:ADVANCED MATERIALS  PY:2010
  TC:51  AU: Garcia-Barriocanal, Javier;Bruno, Flavio Y.;Rivera-Calzada, Alberto;Sefrioui, Zouhair;Nemes, Norbert M.;Garcia-Hernandez, Mar;Rubio-Zuazo, Juan;Castro, German R.;Varela, Maria;Pennycook, Stephen J.;Leon, Carlos;Santamaria, Jacobo;
7:3:26:2     Probing Interfacial Electronic Structures in Atomic Layer LaMnO3 and SrTiO3 Superlattices
DOI:10.1002/adma.200904198  JN:ADVANCED MATERIALS  PY:2010
  TC:34  AU: Shah, Amish B.;Ramasse, Quentin M.;Zhai, Xiaofang;Wen, Jian Guo;May, Steve J.;Petrov, Ivan;Bhattacharya, Anand;Abbamonte, Peter;Eckstein, James N.;Zuo, Jian-Min;
7:3:26:3     Charge states and magnetic ordering in LaMnO3/SrTiO3 superlattices
DOI:10.1103/PhysRevB.83.195113  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Choi, Woo Seok;Jeong, D. W.;Seo, S. S. A.;Lee, Y. S.;Kim, T. H.;Jang, S. Y.;Lee, H. N.;Myung-Whun, K.;
7:3:26:4     Half-Metallic Ferromagnetism via the Interface Electronic Reconstruction in LaAlO3/SrMnO3 Nanosheet Superlattices
DOI:10.1021/nn303943t  JN:ACS NANO  PY:2012
  TC:6  AU: Hou, Fang;Cai, Tian-Yi;Ju, Sheng;Shen, Ming-Rong;
7:3:26:5     Highly Spin-Polarized Conducting State at the Interface between Nonmagnetic Band Insulators: LaAlO3/FeS2 (001)
DOI:10.1103/PhysRevLett.107.166601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:14  AU: Burton, J. D.;Tsymbal, E. Y.;
7:3:26:6     Direct Probing of Nanodimensioned Oxide Multilayers with the Aid of Focused Ion Beam Milling
DOI:10.1002/adma.201102401  JN:ADVANCED MATERIALS  PY:2011
  TC:5  AU: Kuru, Yener;Jalili, Helia;Cai, Zhuhua;Yildiz, Bilge;Tuller, Harry L.;
7:3:26:7     Spin-polarized two-dimensional electron gas through electrostatic doping in LaAlO3/EuO heterostructures
DOI:10.1103/PhysRevB.82.235305  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Lee, Jaekwang;Sai, Na;Demkov, Alexander A.;
7:3:26:8     Polar catastrophe, electron leakage, and magnetic ordering at the LaMnO3OSrMnO3 interface
DOI:10.1103/PhysRevB.81.224408  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Nanda, B. R. K.;Satpathy, S.;
7:3:26:9     New Optical Absorption Bands in Atomic-Layer Superlattices
DOI:10.1002/adma.200904197  JN:ADVANCED MATERIALS  PY:2010
  TC:12  AU: Zhai, Xiaofang;Mohapatra, Chandra S.;Shah, Amish B.;Zuo, Jian-Min;Eckstein, James N.;
7:3:26:10     High mobility half-metallicity in the (LaMnO3)(2)/(SrTiO3)(8) superlattice
DOI:10.1063/1.4789506  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Cossu, F.;Singh, N.;Schwingenschloegl, U.;
7:3:26:11     Magnetic orders and electronic structure in LaMnO3/SrTiO3 superlattices
DOI:10.1063/1.4793705  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Liu, H. M.;Ma, C. Y.;Zhou, P. X.;Dong, S.;Liu, J. -M.;
7:3:26:12     Magnetic properties of the (LaMnO3)(N)/(SrTiO3)(N) atomic layer superlattices
DOI:10.1063/1.4803873  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Zhai, Xiaofang;Mohapatra, Chandra S.;Shah, Amish B.;Zuo, Jian-Min;Eckstein, James N.;
7:3:26:13     Luminescence-based magnetic imaging with scanning x-ray transmission microscopy
DOI:10.1063/1.4747697  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Vaz, C. A. F.;Moutafis, C.;Quitmann, C.;Raabe, J.;
7:3:26:14     Polar catastrophe and the spin-polarized electron gas at the LaMnO3/SrMnO3 interface
DOI:10.1116/1.3454370  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2010
  TC:0  AU: Nanda, B. R. K.;Satpathy, S.;
7:3:27:1     Dimensional-Crossover-Driven Metal-Insulator Transition in SrVO3 Ultrathin Films
DOI:10.1103/PhysRevLett.104.147601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:35  AU: Yoshimatsu, K.;Okabe, T.;Kumigashira, H.;Okamoto, S.;Aizaki, S.;Fujimori, A.;Oshima, M.;
7:3:27:2     Covalency in transition-metal oxides within all-electron dynamical mean-field theory
DOI:10.1103/PhysRevB.90.075136  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Haule, Kristjan;Birol, Turan;Kotliar, Gabriel;
7:3:27:3     Density functional plus dynamical mean-field theory of the metal-insulator transition in early transition-metal oxides
DOI:10.1103/PhysRevB.90.125114  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Dang, Hung T.;Ai, Xinyuan;Millis, Andrew J.;Marianetti, Chris A.;
7:3:27:4     Metal-insulator transition in SrTi1-xVxO3 thin films
DOI:10.1063/1.4836576  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Gu, Man;Wolf, Stuart A.;Lu, Jiwei;
7:3:27:5     Strain effects on magnetic characteristics of ultrathin La0.7Sr0.3MnO3 in epitaxial La0.7Sr0.3MnO3/BaTiO3 superlattices
DOI:10.1063/1.4770485  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Shen, Xuan;Mo, Dan;Li, Chen;Wu, Di;Li, Aidong;
7:3:27:6     Electron molecular beam epitaxy: Layer-by-layer growth of complex oxides via pulsed electron-beam deposition
DOI:10.1063/1.4774238  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Comes, Ryan;Gu, Man;Khokhlov, Mikhail;Liu, Hongxue;Lu, Jiwei;Wolf, Stuart A.;
7:3:27:7     Covalency and the metal-insulator transition in titanate and vanadate perovskites
DOI:10.1103/PhysRevB.89.161113  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Dang, Hung T.;Millis, Andrew J.;Marianetti, Chris A.;
7:3:27:8     Anomalous mass enhancement in strongly correlated quantum wells
DOI:10.1103/PhysRevB.84.201305  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Okamoto, Satoshi;
7:3:27:9     Designing ferromagnetism in vanadium oxide based superlattices
DOI:10.1103/PhysRevB.87.184434  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Dang, Hung T.;Millis, Andrew J.;
7:3:27:10     Theory of ferromagnetism in vanadium-oxide based perovskites
DOI:10.1103/PhysRevB.87.155127  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Dang, Hung T.;Millis, Andrew J.;
7:3:27:11     Metal-insulator transition in low dimensional La0.75Sr0.25VO3 thin films
DOI:10.1063/1.3638065  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Tran M. Dao;Mondal, Partha S.;Takamura, Y.;Arenholz, E.;Lee, Jaichan;
7:3:27:12     Metal-insulator transition induced in CaVO3 thin films
DOI:10.1063/1.4798963  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Gu, Man;Laverock, Jude;Chen, Bo;Smith, Kevin E.;Wolf, Stuart A.;Lu, Jiwei;
7:3:27:13     Magnetically Tunable Metal-Insulator Superlattices
DOI:10.1002/adma.200902734  JN:ADVANCED MATERIALS  PY:2010
  TC:11  AU: Nakamura, Masao;Okuyama, Daisuke;Lee, Jong Seok;Arima, Taka-hisa;Wakabayashi, Yusuke;Kumai, Reiji;Kawasaki, Masashi;Tokura, Yoshinori;
7:3:27:14     Highly Conductive SrVO3 as a Bottom Electrode for Functional Perovskite Oxides
DOI:10.1002/adma.201300900  JN:ADVANCED MATERIALS  PY:2013
  TC:6  AU: Moyer, Jarrett A.;Eaton, Craig;Engel-Herbert, Roman;
7:3:27:15     Structural, magnetic, and nanoscale switching properties of BiFeO3 thin films grown by pulsed electron deposition
DOI:10.1116/1.4802924  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:0  AU: Liu, Hongxue;Comes, Ryan;Pei, Yonghang;Lu, Jiwei;Wolf, Stuart A.;
7:3:27:16     Enhanced second-harmonic generation in Pr0.5Ca0.5MnO3/La0.5Sr0.5MnO3 superlattices
DOI:10.1063/1.4851237  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Lee, J. S.;Nakamura, M.;Kawasaki, M.;Tokura, Y.;
7:3:28:1     Tuning of the metal-insulator transition in electrolyte-gated NdNiO3 thin films
DOI:10.1063/1.3496458  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:41  AU: Asanuma, S.;Xiang, P. -H.;Yamada, H.;Sato, H.;Inoue, I. H.;Akoh, H.;Sawa, A.;Ueno, K.;Shimotani, H.;Yuan, H.;Kawasaki, M.;Iwasa, Y.;
7:3:28:2     Strain-Mediated Phase Control and Electrolyte-Gating of Electron-Doped Manganites
DOI:10.1002/adma.201102968  JN:ADVANCED MATERIALS  PY:2011
  TC:24  AU: Xiang, Ping-Hua;Asanuma, Shutaro;Yamada, Hiroyuki;Inoue, Isao H.;Sato, Hiroshi;Akoh, Hiroshi;Sawa, Akihito;Ueno, Kazunori;Yuan, Hongtao;Shimotani, Hidekazu;Kawasaki, Masashi;Iwasa, Yoshihiro;
7:3:28:3     Electrostatic charge accumulation versus electrochemical doping in SrTiO3 electric double layer transistors
DOI:10.1063/1.3457785  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:25  AU: Ueno, K.;Shimotani, H.;Iwasa, Y.;Kawasaki, M.;
7:3:28:4     Atomic-Scale Characterization of Oxide Thin Films Gated by Ionic Liquid
DOI:10.1021/am504547b  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:2  AU: Lang, Andrew C.;Sloppy, Jennifer D.;Ghassemi, Hessam;Devlin, Robert C.;Sichel-Tissot, Rebecca J.;Idrobo, Juan-Carlos;May, Steven J.;Taheri, Mitra L.;
7:3:28:5     Suppression of Ionic Liquid Gate-Induced Metallization of SrTiO3(001) by Oxygen
DOI:10.1021/nl402088f  JN:NANO LETTERS  PY:2013
  TC:13  AU: Li, Mingyang;Han, Wei;Jiang, Xin;Jeong, Jaewoo;Samant, Mahesh G.;Parkin, Stuart S. P.;
7:3:28:6     Electrolyte-Gated SmCoO3 Thin-Film Transistors Exhibiting Thickness-Dependent Large Switching Ratio at Room Temperature
DOI:10.1002/adma.201204505  JN:ADVANCED MATERIALS  PY:2013
  TC:7  AU: Xiang, Ping-Hua;Asanuma, Shutaro;Yamada, Hiroyuki;Sato, Hiroshi;Inoue, Isao H.;Akoh, Hiroshi;Sawa, Akihito;Kawasaki, Masashi;Iwasa, Yoshihiro;
7:3:28:7     Increased T-c in Electrolyte-Gated Cuprates
DOI:10.1002/adma.200904024  JN:ADVANCED MATERIALS  PY:2010
  TC:29  AU: Dhoot, Anoop Singh;Wimbush, Stuart C.;Benseman, Tim;MacManus-Driscoll, Judith L.;Cooper, J. R.;Friend, Richard Henry;
7:3:28:8     Electric double layer transistor with a (Ga,Mn)As channel
DOI:10.1063/1.3277146  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Endo, M.;Chiba, D.;Shimotani, H.;Matsukura, F.;Iwasa, Y.;Ohno, H.;
7:3:28:9     Electric double layer gate controlled non-linear transport in a nanostructured functional perovskite oxide film
DOI:10.1063/1.4867081  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Nath, Rajib;Raychaudhuri, A. K.;
7:3:28:10     Reversible Ferromagnetic Phase Transition in Electrode-Gated Manganites
DOI:10.1002/adfm.201402007  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:5  AU: Cui, Bin;Song, Cheng;Wang, Guangyue;Yan, Yinuo;Peng, Jingjing;Miao, Jinghui;Mao, Haijun;Li, Fan;Chen, Chao;Zeng, Fei;Pan, Feng;
7:3:28:11     Gate Control of Percolative Conduction in Strongly Correlated Manganite Films
DOI:10.1002/adma.201304813  JN:ADVANCED MATERIALS  PY:2014
  TC:2  AU: Hatano, Takafumi;Sheng, Zhigao;Nakamura, Masao;Nakano, Masaki;Kawasaki, Masashi;Iwasa, Yoshihiro;Tokura, Yoshinori;
7:3:28:12     All-solid-state electric-double-layer transistor based on oxide ion migration in Gd-doped CeO2 on SrTiO3 single crystal
DOI:10.1063/1.4818736  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Tsuchiya, Takashi;Terabe, Kazuya;Aono, Masakazu;
7:3:28:13     Electric field effect on superconductivity in La2-xSrxCuO4
DOI:10.1063/1.4726158  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Dubuis, G.;Bollinger, A. T.;Pavuna, D.;Bozovic, I.;
7:3:28:14     Superconducting cuprate heterostructures for hot electron bolometers
DOI:10.1063/1.4834298  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Wen, B.;Yakobov, R.;Vitkalov, S. A.;Sergeev, A.;
7:3:28:15     Phase diagrams of strained Ca1-xCexMnO3 films
DOI:10.1063/1.4768198  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Xiang, P. -H.;Yamada, H.;Akoh, H.;Sawa, A.;
7:3:29:1     Strictly one-dimensional electron system in Au chains on Ge(001) revealed by photoelectron k-space mapping
DOI:10.1103/PhysRevB.83.121411  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Meyer, S.;Schaefer, J.;Blumenstein, C.;Hoepfner, P.;Bostwick, A.;McChesney, J. L.;Rotenberg, E.;Claessen, R.;
7:3:29:2     Surface core-level shifts on clean Si(001) and Ge(001) studied with photoelectron spectroscopy and density functional theory calculations
DOI:10.1103/PhysRevB.81.125443  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Eriksson, P. E. J.;Uhrberg, R. I. G.;
7:3:29:3     Local atomic and electronic structure of Au-adsorbed Ge(001) surfaces: Scanning tunneling microscopy and x-ray photoemission spectroscopy
DOI:10.1103/PhysRevB.83.035311  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Niikura, Ryota;Nakatsuji, Kan;Komori, Fumio;
7:3:29:4     Epitaxial growth of Au on Ge(001) surface: Photoelectron spectroscopy measurements and first-principles calculations
DOI:10.1016/j.tsf.2013.12.049  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Popescu, Dana G.;Husanu, Marius A.;
7:3:29:5     Shape of metallic band at single-domain Au-adsorbed Ge(001) surface studied by angle-resolved photoemission spectroscopy
DOI:10.1103/PhysRevB.84.115411  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Nakatsuji, Kan;Motomura, Yuya;Niikura, Ryota;Komori, Fumio;
7:3:29:6     Valence band and core-level photoemission of Au/Ge(001): Band mapping and bonding sites
DOI:10.1103/PhysRevB.90.125409  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Meyer, S.;Dudy, L.;Schaefer, J.;Blumenstein, C.;Hoepfner, P.;Umbach, T. E.;Dollinger, A.;Cui, X. Y.;Patthey, L.;Claessen, R.;
7:3:29:7     Structural examination of Au/Ge(001) by surface x-ray diffraction and scanning tunneling microscopy
DOI:10.1103/PhysRevB.85.235439  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Meyer, S.;Umbach, T. E.;Blumenstein, C.;Schaefer, J.;Claessen, R.;Sauer, S.;Leake, S. J.;Willmott, P. R.;Fiedler, M.;Bechstedt, F.;
7:3:29:8     Absence of Luttinger liquid behavior in Au-Ge wires: A high-resolution scanning tunneling microscopy and spectroscopy study
DOI:10.1103/PhysRevB.90.165410  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Park, Jewook;Nakatsuji, Kan;Kim, Tae-Hwan;Song, Sun Kyu;Komori, Fumio;Yeom, Han Woong;
7:3:29:9     First-principles studies of Au-induced nanowires on Ge(001)
DOI:10.1103/PhysRevB.81.075412  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Sauer, S.;Fuchs, F.;Bechstedt, F.;Blumenstein, C.;Schaefer, J.;
7:3:29:10     Temperature- and exposure-dependent study of the Ge(001)c(8 x 2)-Au surface
DOI:10.1103/PhysRevB.83.033302  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Gallagher, M. C.;Melnik, S.;Mahler, D.;
7:3:29:11     Symmetry-Breaking Phase Transition without a Peierls Instability in Conducting Monoatomic Chains
DOI:10.1103/PhysRevLett.107.165702  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:8  AU: Blumenstein, C.;Schaefer, J.;Morresi, M.;Mietke, S.;Matzdorf, R.;Claessen, R.;
7:3:29:12     First-principles description of atomic gold chains on Ge(001)
DOI:10.1103/PhysRevB.81.041415  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Lopez-Moreno, S.;Romero, A. H.;Munoz, A.;Schwingenschloegl, U.;
7:3:29:13     Dispersive resonance bands within the space-charge layer of a metal-semiconductor junction
DOI:10.1103/PhysRevB.81.245406  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Tang, S. -J.;Chang, Tay-Rong;Huang, Chien-Chung;Lee, Chang-Yeh;Cheng, Cheng-Maw;Tsuei, Ku-Ding;Jeng, H. -T.;Mou, Chung-Yu;
7:3:29:14     Dynamics of the wetting-induced nanowire reconstruction of Au/Ge(001)
DOI:10.1103/PhysRevB.88.085415  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Safaei, A.;van Houselt, A.;Poelsema, B.;Zandvliet, H. J. W.;van Gastel, R.;
7:3:29:15     Dimer-T-3 reconstruction of the Sm/Si(100)(2 x 3) surface studied by high-resolution photoelectron spectroscopy and density functional theory calculations
DOI:10.1103/PhysRevB.84.245322  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Kuzmin, M.;Punkkinen, M. P. J.;Laukkanen, P.;Lang, J. J. K.;Dahl, J.;Tuominen, M.;Tuominen, V.;Adell, J.;Balasubramanian, T.;Vitos, L.;Kokko, K.;
7:3:29:16     The reaction of Si(001) with magnesium and calcium
DOI:10.1063/1.3549256  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Pi, T. -W.;Cheng, C. -P.;Wertheim, G. K.;
7:3:29:17     Atomic structure of Yb/Si(100)(2X6): Interrelation between the silicon dimer arrangement and Si 2p photoemission line shape
DOI:10.1103/PhysRevB.82.113302  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Kuzmin, M.;Punkkinen, M. P. J.;Laukkanen, P.;Perala, R. E.;Tuominen, V.;Lang, J. J. K.;Ahola-Tuomi, M.;Dahl, J.;Balasubramanian, T.;Johansson, B.;Vitos, L.;Vayrynen, I. J.;
7:3:29:18     Density of states anomalies in multichannel quantum wires
DOI:10.1103/PhysRevB.84.075443  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Yoshioka, Hideo;Shima, Hiroyuki;
7:3:29:19     Surface core-level shifts on Ge(111)c(2 x 8): Experiment and theory
DOI:10.1103/PhysRevB.83.245319  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Kuzmin, M.;Punkkinen, M. P. J.;Laukkanen, P.;Lang, J. J. K.;Dahl, J.;Tuominen, V.;Tuominen, M.;Perala, R. E.;Balasubramanian, T.;Adell, J.;Johansson, B.;Vitos, L.;Kokko, K.;Vayrynen, I. J.;
7:3:29:20     Sodium chloride on Si(100) grown by molecular beam epitaxy
DOI:10.1103/PhysRevB.83.085305  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Chung, Jen-Yang;Li, Hong-Dao;Chang, Wan-Heng;Leung, T. C.;Lin, Deng-Sung;
7:3:29:21     Two-dimensional states localized in subsurface layers of Ge(111)
DOI:10.1103/PhysRevB.88.245310  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;
7:3:29:22     Surface reconstruction at the initial Ge adsorption stage on Si(114)-2 x 1
DOI:10.1116/1.4792243  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2013
  TC:0  AU: Duvjir, Ganbat;Kim, Hidong;Dugerjav, Otgonbayar;Li, Huiting;Motlak, Moaaed;Arvisbaatar, Amarmunkh;Seo, Jae M.;
7:3:30:1     The origin of oxygen in oxide thin films: Role of the substrate
DOI:10.1063/1.3515849  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:33  AU: Schneider, C. W.;Esposito, M.;Marozau, I.;Conder, K.;Doebeli, M.;Hu, Yi;Mallepell, M.;Wokaun, A.;Lippert, T.;
7:3:30:2     Room-Temperature Giant Persistent Photoconductivity in SrTiO3/LaAlO3 Heterostructures
DOI:10.1021/nn203991q  JN:ACS NANO  PY:2012
  TC:39  AU: Tebano, Antonello;Fabbri, Emiliana;Pergolesi, Daniele;Balestrino, Giuseppe;Traversa, Enrico;
7:3:30:3     Metal-Insulator Transition in SrTiO3-x Thin Films Induced by Frozen-Out Carriers
DOI:10.1103/PhysRevLett.107.146802  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:24  AU: Liu, Z. Q.;Leusink, D. P.;Wang, X.;Lu, W. M.;Gopinadhan, K.;Annadi, A.;Zhao, Y. L.;Huang, X. H.;Zeng, S. W.;Huang, Z.;Srivastava, A.;Dhar, S.;Venkatesan, T.;Ariando;
7:3:30:4     Hybrid density functional study of oxygen vacancies in KTaO3 and NaTaO3
DOI:10.1103/PhysRevB.83.214107  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Choi, Minseok;Oba, Fumiyasu;Tanaka, Isao;
7:3:30:5     Reversible room-temperature ferromagnetism in Nb-doped SrTiO3 single crystals
DOI:10.1103/PhysRevB.87.220405  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Liu, Z. Q.;Lu, W. M.;Lim, S. L.;Qiu, X. P.;Bao, N. N.;Motapothula, M.;Yi, J. B.;Yang, M.;Dhar, S.;Venkatesan, T.;Ariando;
7:3:30:6     Oxygen vacancies-induced metal-insulator transition in La2/3Sr1/3VO3 thin films: Role of the oxygen substrate-to-film transfer
DOI:10.1063/1.4896159  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Hu, L.;Luo, X.;Zhang, K. J.;Tang, X. W.;Zu, L.;Kan, X. C.;Chen, L.;Zhu, X. B.;Song, W. H.;Dai, J. M.;Sun, Y. P.;
7:3:30:7     Origin of the diverse behavior of oxygen vacancies in ABO(3) perovskites: A symmetry based analysis
DOI:10.1103/PhysRevB.85.201201  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Yin, Wan-Jian;Wei, Su-Huai;Al-Jassim, Mowafak M.;Yan, Yanfa;
7:3:30:8     Pulsed laser deposition-induced reduction of SrTiO3 crystals
DOI:10.1016/j.actamat.2009.09.024  JN:ACTA MATERIALIA  PY:2010
  TC:26  AU: Scullin, Matthew L.;Ravichandran, Jayakanth;Yu, Choongho;Huijben, Mark;Seidel, Jan;Majumdar, Arun;Ramesh, R.;
7:3:30:9     Chemical potential shift and gap-state formation in SrTiO3-delta revealed by photoemission spectroscopy
DOI:10.1063/1.4892397  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Pal, Prabir;Kumar, Pramod;Aswin, V.;Dogra, Anjana;Joshi, Amish G.;
7:3:30:10     Magnetic-field induced resistivity minimum with in-plane linear magnetoresistance of the Fermi liquid in SrTiO3-x single crystals
DOI:10.1103/PhysRevB.85.155114  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Liu, Z. Q.;Lu, W. M.;Wang, X.;Huang, Z.;Annadi, A.;Zeng, S. W.;Venkatesan, T.;Ariando;
7:3:30:11     Surface electronic inhomogeneity of the (001)-SrTiO3:Nb crystal with a terrace-structured morphology
DOI:10.1063/1.4825047  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Li, Y.;Sun, J. R.;Zhao, J. L.;Shen, B. G.;
7:3:30:12     Persistent photoconductivity in oxygen deficient YBa2Cu3O7-delta/La2/3Ca1/3MnO3-x superlattices grown by pulsed laser deposition
DOI:10.1063/1.4821746  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Kawashima, Kazuhiro;Soltan, Soltan;Logvenov, Gennady;Habermeier, Hanns-Ulrich;
7:3:31:1     Large Increase of the Curie Temperature by Orbital Ordering Control
DOI:10.1103/PhysRevLett.104.046804  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:33  AU: Sadoc, Aymeric;Mercey, Bernard;Simon, Charles;Grebille, Dominique;Prellier, Wilfrid;Lepetit, Marie-Bernadette;
7:3:31:2     Effect of strain on the orbital and magnetic ordering of manganite thin films and their interface with an insulator
DOI:10.1103/PhysRevB.83.064424  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Baena, A.;Brey, L.;Calderon, M. J.;
7:3:31:3     Theory of Strain-Controlled Magnetotransport and Stabilization of the Ferromagnetic Insulating Phase in Manganite Thin Films
DOI:10.1103/PhysRevLett.110.157201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:10  AU: Mukherjee, Anamitra;Cole, William S.;Woodward, Patrick;Randeria, Mohit;Trivedi, Nandini;
7:3:31:4     Magnetic and orbital order in LaMnO3 under uniaxial strain: A model study
DOI:10.1103/PhysRevB.81.174423  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Nanda, B. R. K.;Satpathy, S.;
7:3:31:5     Intrinsic insulating ferromagnetism in manganese oxide thin films
DOI:10.1103/PhysRevB.89.064415  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Hou, Y. S.;Xiang, H. J.;Gong, X. G.;
7:3:31:6     Magnetotransport anisotropy in lattice-misfit-strained ultrathin La2/3Ca1/3MnO3 films epitaxially grown on (110)-oriented SrTiO3 and LaAlO3 substrates
DOI:10.1063/1.4732096  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Guo, N. L.;Li, J.;Wei, Y. F.;Zhang, Y.;Cui, L. M.;Zhao, L.;Jin, Y. R.;Tian, H. Y.;Deng, Hui;Zhao, G. P.;Zheng, D. N.;
7:3:31:7     Electronic structure and magneto-optical spectra of LaxSr1-xMnO3 perovskites: Theory and experiment
DOI:10.1103/PhysRevB.85.125124  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Uba, L.;Uba, S.;Germash, L. P.;Bekenov, L. V.;Antonov, V. N.;
7:3:31:8     Jahn-Teller distortion and magnetic structure in LaMnO3: A first-principles theoretical study with full structure optimizations
DOI:10.1103/PhysRevB.82.045124  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Hashimoto, T.;Ishibashi, S.;Terakura, K.;
7:3:31:9     Three-dimensional strain state and spacer thickness-dependent properties of epitaxial Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3/Pr0.7Sr0.3MnO3 trilayer structure
DOI:10.1063/1.4884995  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Wang, Haiou;Zhang, Jie;Jia, Quanjie;Xu, Feng;Tan, Weishi;Huo, Dexuan;Gao, Ju;
7:3:31:10     Orbital anisotropy in paramagnetic manganese oxide nanostripes
DOI:10.1103/PhysRevB.87.241407  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Altieri, S.;Allegretti, F.;Steurer, W.;Surnev, S.;Finazzi, M.;Sessi, V.;Brookes, N. B.;Valeri, S.;Netzer, F. P.;
7:3:31:11     Bandwidth-limited control of orbital and magnetic orders in half-doped manganites by epitaxial strain
DOI:10.1103/PhysRevB.89.075107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Gutierrez, D.;Radaelli, G.;Sanchez, F.;Bertacco, R.;Fontcuberta, J.;
7:3:31:12     Significant increasing of onset temperature of FM transition in LSMO thin films
DOI:10.1016/j.apsusc.2012.10.005  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:7  AU: Chromik, Stefan;Strbik, Vladimir;Dobrocka, Edmund;Dujavova, Agata;Reiffers, Marian;Liday, Jozef;Spankova, Marianna;
7:3:31:13     Observation of the Strain Induced Magnetic Phase Segregation in Manganite Thin Films
DOI:10.1021/nl503834b  JN:NANO LETTERS  PY:2015
  TC:1  AU: Marin, Lorena;Rodriguez, Luis A.;Magen, Cesar;Snoeck, Etienne;Arras, Remi;Lucas, Irene;Morellon, Luis;Algarabel, Pedro A.;De Teresa, Jose M.;Ricardo Ibarra, M.;
7:3:31:14     Density functional studies of LaMnO3 under uniaxial strain
DOI:10.1016/j.jmmm.2010.07.017  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Nanda, B. R. K.;Satpathy, S.;
7:3:31:15     Magnetoresistance studies of La2/3Sr1/3MnO3-YBa2Cu3O7-La2/3Sr1/3MnO3 trilayers with ferromagnetic coupling along the nodal direction of YBa2Cu3O7
DOI:10.1103/PhysRevB.81.014515  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Mandal, Soumen;
7:3:31:16     Surface antiferromagnetism and incipient metal-insulator transition in strained manganite films
DOI:10.1103/PhysRevB.87.214420  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Cossu, F.;Schwingenschloegl, U.;Colizzi, G.;Filippetti, A.;Fiorentini, Vincenzo;
7:3:31:17     Jahn-Teller distortion and magnetic structure in LaMnO3: A first-principles theoretical study with full structure optimizations (vol 82, 045124, 2010)
DOI:10.1103/PhysRevB.82.079903  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Hashimoto, T.;Ishibashi, S.;Terakura, K.;
7:3:31:18     Stray field enhanced vortex dissipation in YBa2Cu3O7/La0.7Sr0.3MnO3/YBa2Cu3O7 hetero-epitaxial tri-layer
DOI:10.1063/1.4813110  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Joseph, D. Paul;Hsu, Daniel;Lin, J. G.;
7:3:31:19     LSMO thin films with high metal-insulator transition temperature on buffered SOI substrates for uncooled microbolometers
DOI:10.1016/j.apsusc.2014.05.051  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Chromik, S.;Strbik, V.;Dobrocka, E.;Roch, T.;Rosova, A.;Spankova, M.;Lalinsky, T.;Vanko, G.;Lobotka, P.;Ralbovsky, M.;Choleva, P.;
7:3:32:1     Interface properties of magnetic tunnel junction La0.7Sr0.3MnO3/SrTiO3 superlattices studied by standing-wave excited photoemission spectroscopy
DOI:10.1103/PhysRevB.82.205116  JN:PHYSICAL REVIEW B  PY:2010
  TC:22  AU: Gray, A. X.;Papp, C.;Balke, B.;Yang, S. -H.;Huijben, M.;Rotenberg, E.;Bostwick, A.;Ueda, S.;Yamashita, Y.;Kobayashi, K.;Gullikson, E. M.;Kortright, J. B.;de Groot, F. M. F.;Rijnders, G.;Blank, D. H. A.;Ramesh, R.;Fadley, C. S.;
7:3:32:2     Tuning the dead-layer behavior of La0.67Sr0.33MnO3/SrTiO3 via interfacial engineering
DOI:10.1063/1.4866461  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Peng, R.;Xu, H. C.;Xia, M.;Xia, M.;Zhao, J. F.;Xie, X.;Xu, D. F.;Xie, B. P.;Feng, D. L.;
7:3:32:3     Depth Profiling Charge Accumulation from a Ferroelectric into a Doped Mott Insulator
DOI:10.1021/acs.nanolett.5b00104  JN:NANO LETTERS  PY:2015
  TC:2  AU: Marinova, Maya;Rault, Julien E.;Gloter, Alexandre;Nemsak, Slavomir;Palsson, Gunnar K.;Rueff, Jean-Pascal;Fadley, Charles S.;Carretero, Cecile;Yamada, Hiroyuki;March, Katia;Garcia, Vincent;Fusil, Stephane;Barthelemy, Agnes;Stephan, Odile;Colliex, Christian;Bibes, Manuel;
7:3:32:4     Evolution of the band alignment at polar oxide interfaces
DOI:10.1103/PhysRevB.82.161407  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Burton, J. D.;Tsymbal, E. Y.;
7:3:32:5     Termination layer dependence of Schottky barrier height for La0.6Sr0.4MnO3/Nb:SrTiO3 heterojunctions
DOI:10.1103/PhysRevB.81.235322  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Minohara, M.;Yasuhara, R.;Kumigashira, H.;Oshima, M.;
7:3:32:6     Preventing the Reconstruction of the Polar Discontinuity at Oxide Heterointerfaces
DOI:10.1002/adfm.201102763  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:18  AU: Boschker, H.;Verbeeck, J.;Egoavil, R.;Bals, S.;van Tendeloo, G.;Huijben, M.;Houwman, E. P.;Koster, G.;Blank, D. H. A.;Rijnders, G.;
7:3:32:7     Preferential occupation of interface bands in La2/3Sr1/3MnO3 films as seen via angle-resolved photoemission
DOI:10.1103/PhysRevB.82.214407  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Tebano, A.;Orsini, A.;Medaglia, P. G.;Di Castro, D.;Balestrino, G.;Freelon, B.;Bostwick, A.;Chang, Young Jun;Gaines, G.;Rotenberg, E.;Saini, N. L.;
7:3:32:8     Optimal interface doping at La2/3Sr1/3MnO3/SrTiO3(001) heterojunctions for spintronic applications
DOI:10.1063/1.4802732  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Wang, C.;Stojic, N.;Binggeli, N.;
7:3:32:9     Determination of layer-resolved composition, magnetization, and electronic structure of an Fe/MgO tunnel junction by standing-wave core and valence photoemission
DOI:10.1103/PhysRevB.84.184410  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Yang, See-Hun;Balke, Benjamin;Papp, Christian;Doering, Sven;Berges, Ulf;Plucinski, L.;Westphal, Carsten;Schneider, Claus M.;Parkin, Stuart S. P.;Fadley, Charles S.;
7:3:32:10     Influence of the interface atomic structure on the magnetic and electronic properties of La2/3Sr1/3MnO3/SrTiO3(001) heterojunctions
DOI:10.1103/PhysRevB.82.245311  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Zheng, Bing;Binggeli, Nadia;
7:3:32:11     Making use of x-ray optical effects in photoelectron-, Auger electron-, and x-ray emission spectroscopies: Total reflection, standing-wave excitation, and resonant effects
DOI:10.1063/1.4790171  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:9  AU: Yang, S. -H.;Gray, A. X.;Kaiser, A. M.;Mun, B. S.;Sell, B. C.;Kortright, J. B.;Fadley, C. S.;
7:3:32:12     Hard x-ray photoemission using standing-wave excitation applied to the MgO/Fe interface
DOI:10.1103/PhysRevB.83.165444  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Doering, Sven;Schoenbohm, Frank;Berges, Ulf;Schreiber, Reinert;Buergler, Daniel E.;Schneider, Claus M.;Gorgoi, Mihaela;Schaefers, Franz;Papp, Christian;Balke, Benjamin;Fadley, Charles S.;Westphal, Carsten;
7:3:32:13     Structural investigation of the three-layer system MgO/Fe/GaAs(001) by means of photoelectron spectroscopy and diffraction
DOI:10.1103/PhysRevB.88.045313  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Handschak, D.;Luehr, T.;Schoenbohm, F.;Doering, S.;Keutner, C.;Berges, U.;Westphal, C.;
7:3:32:14     Standing-wave excited soft x-ray photoemission microscopy: Application to Co microdot magnetic arrays
DOI:10.1063/1.3478215  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Gray, Alexander X.;Kronast, Florian;Papp, Christian;Yang, See-Hun;Cramm, Stefan;Krug, Ingo P.;Salmassi, Farhad;Gullikson, Eric M.;Hilken, Dawn L.;Anderson, Erik H.;Fischer, Peter;Duumlrr, Hermann A.;Schneider, Claus M.;Fadley, Charles. S.;
7:3:32:15     Nondestructive characterization of a TiN metal gate: Chemical and structural properties by means of standing-wave hard x-ray photoemission spectroscopy
DOI:10.1063/1.4765720  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Papp, C.;Conti, G.;Balke, B.;Ueda, S.;Yamashita, Y.;Yoshikawa, H.;Uritsky, Y. S.;Kobayashi, K.;Fadley, C. S.;
7:3:32:16     Depth profiling the potential in perovskite oxide heterojunctions using photoemission spectroscopy
DOI:10.1103/PhysRevB.85.165108  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Minohara, M.;Horiba, K.;Kumigashira, H.;Ikenaga, E.;Oshima, M.;
7:3:32:17     Theoretical study of the heteroepitaxial growth of Pd on Cu(111), Pd on Ni(111), Ni on Pd(111), and Cu on Pd(111) using a semiempirical method
DOI:10.1103/PhysRevB.81.085437  JN:PHYSICAL REVIEW B  PY:2010
  TC:1  AU: Negreiros, F. R.;Soares, E. A.;de Siervo, A.;Paniago, R.;de Carvalho, V. E.;Landers, R.;
7:3:32:18     Electrochemical impedance analysis of electric field dependence of the permittivity of SrTiO3 and TiO2 single crystals
DOI:10.1063/1.3530612  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Matsumoto, Yuji;Takata, Shintaro;Tanaka, Ryohei;Hachiya, Atsushi;
7:3:32:19     Rare-earth oxide/TiN gate stacks on high mobility strained silicon on insulator for fully depleted metal-oxide-semiconductor field-effect transistors
DOI:10.1116/1.3533760  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:2  AU: Oezben, E. Durgun;Lopes, J. M. J.;Nichau, A.;Luptak, R.;Lenk, S.;Besmehn, A.;Bourdelle, K. K.;Zhao, Q. T.;Schubert, J.;Mantl, S.;
7:3:33:1     Electronic transport and conduction mechanism transition in La1/3Sr2/3FeO3 thin films
DOI:10.1063/1.4883541  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Devlin, R. C.;Krick, A. L.;Sichel-Tissot, R. J.;Xie, Y. J.;May, S. J.;
7:3:33:2     Control of Functional Responses Via Reversible Oxygen Loss in La1-xSrxFeO3-delta Films
DOI:10.1002/adma.201304374  JN:ADVANCED MATERIALS  PY:2014
  TC:13  AU: Xie, Yujun;Scafetta, Mark D.;Sichel-Tissot, Rebecca J.;Moon, Eun Ju;Devlin, Robert C.;Wu, Hanqi;Krick, Alex L.;May, Steven J.;
7:3:33:3     Optical absorption in epitaxial La1-xSrxFeO3 thin films
DOI:10.1063/1.4794145  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Scafetta, M. D.;Xie, Y. J.;Torres, M.;Spanier, J. E.;May, S. J.;
7:3:33:4     Electronic phase diagram of epitaxial La1-xSrxFeO3 films
DOI:10.1063/1.4893139  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Xie, Y. J.;Scafetta, M. D.;Moon, E. J.;Krick, A. L.;Sichel-Tissot, R. J.;May, S. J.;
7:3:33:5     Charge disproportionation in La1-xCaxFeO3-delta (x=0.4 and 0.5) investigated by mechanical spectroscopy
DOI:10.1063/1.4869662  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Xu, Z. C.;Liu, M. F.;Chen, C. C.;Ying, X. N.;
7:3:33:6     Oxygen vacancies and their effects on tilting transition in perovskite (La1-xPrx)(1/3)Sr2/3FeO3-delta investigated by mechanical spectroscopy
DOI:10.1063/1.4893155  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Xu, Z. C.;Chen, C. C.;Ying, X. N.;
7:3:33:7     Role of magnetic exchange energy on charge ordering in R1/3Sr2/3FeO3 (R = La, Pr, and Nd)
DOI:10.1103/PhysRevB.84.224115  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Ma, J.;Yan, J. -Q.;Diallo, S. O.;Stevens, R.;Llobet, A.;Trouw, F.;Abernathy, D. L.;Stone, M. B.;McQueeney, R. J.;
7:3:33:8     Anelastic spectroscopy study of the metal-insulator transition of Nd1-xEuxNiO3
DOI:10.1103/PhysRevB.84.125127  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Cordero, F.;Trequattrini, F.;Barbeta, V. B.;Jardim, R. F.;Torikachvili, M. S.;
7:3:33:9     Complex charge ordering phenomena in La1-xSrxFeO3-delta investigated by mechanical spectroscopy
DOI:10.1063/1.4767354  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Ying, X. N.;
7:3:33:10     Quasi-two-dimensional d-spin and p-hole ordering in the three-dimensional perovskite La1/3Sr2/3FeO3
DOI:10.1103/PhysRevB.82.132402  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Okamoto, J.;Huang, D. J.;Chao, K. S.;Huang, S. W.;Hsu, C. -H.;Fujimori, A.;Masuno, A.;Terashima, T.;Takano, M.;Chen, C. T.;
7:3:33:11     Spin-assisted covalent bond mechanism in "charge-ordering" perovskite oxides
DOI:10.1103/PhysRevB.86.195144  JN:PHYSICAL REVIEW B  PY:2012
  TC:42  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;
7:3:33:12     Enhanced charge ordering transition in doped CaFeO3 through steric templating
DOI:10.1103/PhysRevB.89.235106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Jiang, Lai;Saldana-Greco, Diomedes;Schick, Joseph T.;Rappe, Andrew M.;
7:3:33:13     The effect of oxygen vacancies on the electronic phase transition in La1/3Sr2/3FeO3 films
DOI:10.1063/1.4833276  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Sichel-Tissot, Rebecca J.;Devlin, Robert C.;Ryan, Philip J.;Kim, Jong-Woo;May, Steven J.;
7:3:33:14     Defect ordering and defect-domain-wall interactions in PbTiO3: A first-principles study
DOI:10.1103/PhysRevB.88.214116  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;
7:3:33:15     The Mn-doping effect on the charge ordering state of La1/3Sr2/3FeO3
DOI:10.1016/j.jallcom.2010.09.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Kong Hui;Kong Zhang-Qing;Zhu Changfei;
7:3:33:16     Rigorous Definition of Oxidation States of Ions in Solids
DOI:10.1103/PhysRevLett.108.166403  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:8  AU: Jiang, Lai;Levchenko, Sergey V.;Rappe, Andrew M.;
7:3:33:17     Iron-resonant valence band photoemission and oxygen near edge x-ray absorption fine structure study on La1-xSrxFe0.75Ni0.25O3-delta
DOI:10.1063/1.3484960  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Erat, Selma;Wadati, Hiroki;Aksoy, Funda;Liu, Zhi;Graule, Thomas;Gauckler, Ludwig J.;Braun, Artur;
7:3:33:18     Short-range charge-ordering correlated elastic anomalies in La2/3Sr1/3FeO3
DOI:10.1016/j.ceramint.2012.12.036  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Kong Hui;Zhu Changfei;
7:3:33:19     Metal-insulator transition in Nd1-x Eu-x NiO3 probed by specific heat and anelastic measurements
DOI:10.1063/1.3549615  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Barbeta, V. B.;Jardim, R. F.;Torikachvili, M. S.;Escote, M. T.;Cordero, F.;Pontes, F. M.;Trequattrini, F.;
7:3:34:1     Strain engineering to control the magnetic and magnetotransport properties of La0.67Sr0.33MnO3 thin films
DOI:10.1063/1.3484147  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:21  AU: Yang, F.;Kemik, N.;Biegalski, M. D.;Christen, H. M.;Arenholz, E.;Takamura, Y.;
7:3:34:2     Antisite defects in La0.7Sr0.3MnO3 and La0.7Sr0.3FeO3
DOI:10.1063/1.4802210  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Gu, Meng;Wang, Zhiguo;Biegalski, Michael D.;Christen, Hans M.;Takamura, Yayoi;Browning, Nigel D.;
7:3:34:3     Magnetic domain structure of La0.7Sr0.3MnO3 nanoislands: Experiment and simulation
DOI:10.1063/1.3544510  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Kim, Eun Ji;Watts, John L. R.;Harteneck, Bruce;Scholl, Andreas;Young, Anthony;Doran, Andrew;Suzuki, Yuri;
7:3:34:4     Tuning magnetic and transport properties through strain engineering in La0.7Sr0.3MnO3/La0.5Sr0.5TiO3 superlattices
DOI:10.1063/1.4705397  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Gu, Meng;Song, Chengyu;Yang, Fan;Arenholz, Elke;Browning, Nigel D.;Takamura, Yayoi;
7:3:34:5     The effect of interfacial charge transfer on ferromagnetism in perovskite oxide superlattices
DOI:10.1063/1.3674325  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Yang, F.;Gu, M.;Arenholz, E.;Browning, N. D.;Takamura, Y.;
7:3:34:6     Effects of nanostructuring and substrate symmetry on antiferromagnetic domain structure in LaFeO3 thin films
DOI:10.1103/PhysRevB.84.220410  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Folven, E.;Scholl, A.;Young, A.;Retterer, S. T.;Boschker, J. E.;Tybell, T.;Takamura, Y.;Grepstad, J. K.;
7:3:34:7     Strain relaxation defects in perovskite oxide superlattices
DOI:10.1557/jmr.2012.42  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:5  AU: Gu, Meng;Biegalski, Michael D.;Christen, Hans M.;Song, Chengyu;Dearden, Craig R.;Browning, Nigel D.;Takamura, Yayoi;
7:3:34:8     Crossover from Spin-Flop Coupling to Collinear Spin Alignment in Antiferromagnetic/Ferromagnetic Nanostructures
DOI:10.1021/nl300361e  JN:NANO LETTERS  PY:2012
  TC:9  AU: Folven, Erik;Scholl, Andreas;Young, Anthony;Retterer, Scott T.;Boschker, Jos E.;Tybell, Thomas;Takamura, Yayoi;Grepstad, Jostein K.;
7:3:34:9     Spin-Flop Coupling and Exchange Bias in Embedded Complex Oxide Micromagnets
DOI:10.1103/PhysRevLett.111.107201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:1  AU: Takamura, Yayoi;Folven, Erik;Shu, Jonathan B. R.;Lukes, Karl R.;Li, Binzhi;Scholl, Andreas;Young, Anthony T.;Retterer, Scott T.;Tybell, Thomas;Grepstad, Jostein K.;
7:3:34:10     Shape-induced anisotropy in antiferromagnetic nanoparticles
DOI:10.1016/j.jmmm.2013.11.003  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Gomonay, O.;Kondovych, S.;Loktev, V.;
7:3:34:11     Effect of nitrogen pressure on the properties of AlN films grown on nitrided Al(111) substrates by pulsed laser deposition
DOI:10.1016/j.matlet.2014.05.031  JN:MATERIALS LETTERS  PY:2014
  TC:8  AU: Wang, Wenliang;Liu, Zuolian;Yang, Weijia;Lin, Yunhao;Zhou, Shizhong;Qian, Huirong;Wang, Haiyan;Lin, Zhiting;Li, Guoqiang;
7:3:34:12     Antiferromagnetic Domain Reconfiguration in Embedded LaFeO3 Thin Film Nanostructures
DOI:10.1021/nl1025908  JN:NANO LETTERS  PY:2010
  TC:12  AU: Folven, Erik;Tybell, Thomas;Scholl, Andreas;Young, Anthony;Retterer, Scott T.;Takamura, Yayoi;Grepstad, Jostein K.;
7:3:34:13     Correlated domain structure in perovskite oxide superlattices exhibiting spin-flop coupling
DOI:10.1103/PhysRevB.83.014417  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Yang, Fan;Kemik, Nihan;Scholl, Andreas;Doran, Andrew;Young, Anthony T.;Biegalski, Michael D.;Christen, Hans M.;Takamura, Yayoi;
7:3:34:14     Annealing induced coherent evolutions of biaxial strain and antiferromagnetic-insulator phase in La0.625Ca0.375MnO3 films
DOI:10.1063/1.4754818  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Han, Yunxin;Wu, Wenbin;Jiang, Guoshun;Zhu, Changfei;
7:3:34:15     Resonant x-ray reflectivity study of perovskite oxide superlattices
DOI:10.1063/1.3660719  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Kemik, N.;Gu, M.;Yang, F.;Chang, C. -Y.;Song, Y.;Bibee, M.;Mehta, A.;Biegalski, M. D.;Christen, H. M.;Browning, N. D.;Takamura, Y.;
7:3:34:16     Control of magnetic and transport properties in Nd0.45Sr0.55MnO3 films through epitaxial strain
DOI:10.1063/1.3671787  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Meng, H.;Zhang, Y. Q.;Wang, X. W.;Tang, Y. L.;Wang, Z. H.;Zhu, Y. L.;Zheng, Jian-Guo;Zhang, Z. D.;
7:3:34:17     Cation uniformity and magnetic properties of La0.7Sr0.3Mn0.5Fe0.5O3 thin films
DOI:10.1016/j.jmmm.2012.08.005  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:4  AU: Gu, Meng;Yang, Fan;Arenholz, Elke;Browning, Nigel D.;Takamura, Yayoi;
7:3:34:18     Growth and characterization of La-1 (-) (x)A(x)MnO(3) (A = Ag and K, x=0.33) epitaxial and polycrystalline manganite thin films derived by sol-gel dip-coating technique
DOI:10.1016/j.tsf.2012.06.006  JN:THIN SOLID FILMS  PY:2012
  TC:2  AU: Goktas, A.;Mutlu, I. H.;Kawashi, A.;
7:3:35:1     Termination-dependent electronic and magnetic properties of ultrathin SrRuO3 (111) films on SrTiO3
DOI:10.1103/PhysRevB.89.195411  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kim, Bongjae;Min, B. I.;
7:3:35:2     Magnetic and magnetocaloric properties of Ba and Ti co-doped SrRuO3
DOI:10.1063/1.4904853  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Sarkar, Babusona;Dalal, Biswajit;Ashok, Vishal Dev;De, S. K.;
7:3:35:3     Highly Confined Spin-Polarized Two-Dimensional Electron Gas in SrTiO3/SrRuO3 Superlattices
DOI:10.1103/PhysRevLett.108.107003  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:17  AU: Verissimo-Alves, Marcos;Garcia-Fernandez, Pablo;Bilc, Daniel I.;Ghosez, Philippe;Junquera, Javier;
7:3:35:4     Scaling of the anomalous Hall effect in SrRuO3
DOI:10.1103/PhysRevB.84.174439  JN:PHYSICAL REVIEW B  PY:2011
  TC:13  AU: Haham, Noam;Shperber, Yishai;Schultz, Moty;Naftalis, Netanel;Shimshoni, Efrat;Reiner, James W.;Klein, Lior;
7:3:35:5     Quasiparticle Mass Enhancement and Temperature Dependence of the Electronic Structure of Ferromagnetic SrRuO3 Thin Films
DOI:10.1103/PhysRevLett.110.087004  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Shai, D. E.;Adamo, C.;Shen, D. W.;Brooks, C. M.;Harter, J. W.;Monkman, E. J.;Burganov, B.;Schlom, D. G.;Shen, K. M.;
7:3:35:6     Infrared anomalous Hall effect in SrRuO3: Exploring evidence for crossover to intrinsic behavior
DOI:10.1103/PhysRevB.81.235218  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Kim, M. -H.;Acbas, G.;Yang, M. -H.;Eginligil, M.;Khalifah, P.;Ohkubo, I.;Christen, H.;Mandrus, D.;Fang, Z.;Cerne, J.;
7:3:35:7     Indications of weak electronic correlations in SrRuO3 from first-principles calculations
DOI:10.1103/PhysRevB.86.064441  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Etz, C.;Maznichenko, I. V.;Boettcher, D.;Henk, J.;Yaresko, A. N.;Hergert, W.;Mazin, I. I.;Mertig, I.;Ernst, A.;
7:3:35:8     Thermally assisted current-induced magnetization reversal in SrRuO3
DOI:10.1103/PhysRevB.87.115118  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Shperber, Yishai;Sinwani, Omer;Naftalis, Netanel;Bedau, Daniel;Reiner, James W.;Klein, Lior;
7:3:35:9     Critical behavior of ferromagnetic perovskite ruthenates
DOI:10.1103/PhysRevB.85.184430  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Cheng, J. -G.;Zhou, J. -S.;Goodenough, J. B.;Jin, C. -Q.;
7:3:35:10     Temperature induced magnetization reversal in SrRuO3
DOI:10.1063/1.4850737  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Sarkar, Babusona;Dalal, Biswajit;De, S. K.;
7:3:35:11     Temperature Evolution of Itinerant Ferromagnetism in SrRuO3 Probed by Optical Spectroscopy
DOI:10.1103/PhysRevLett.110.247202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Jeong, D. W.;Choi, Hong Chul;Kim, Choong H.;Chang, Seo Hyoung;Sohn, C. H.;Park, H. J.;Kang, T. D.;Cho, Deok-Yong;Baek, S. H.;Eom, C. B.;Shim, J. H.;Yu, J.;Kim, K. W.;Moon, S. J.;Noh, T. W.;
7:3:35:12     LDA plus DMFT study of Ru-based perovskite SrRuO3 and CaRuO3
DOI:10.1103/PhysRevB.83.041103  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Jakobi, E.;Kanungo, S.;Sarkar, S.;Schmitt, S.;Saha-Dasgupta, T.;
7:3:35:13     Monitoring superparamagnetic Langevin behavior of individual SrRuO3 nanostructures
DOI:10.1103/PhysRevB.89.020404  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Sinwani, Omer;Reiner, James W.;Klein, Lior;
7:3:35:14     Current-induced magnetization reversal in SrRuO3
DOI:10.1103/PhysRevB.86.085102  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Shperber, Yishai;Bedau, Daniel;Reiner, James W.;Klein, Lior;
7:3:35:15     Scaling of the paramagnetic anomalous Hall effect in SrRuO3
DOI:10.1103/PhysRevB.86.144414  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Haham, Noam;Reiner, James W.;Klein, Lior;
7:3:35:16     Nonthermal magnetization reversal assisted by unpolarized current
DOI:10.1103/PhysRevB.82.144417  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Riss, O.;Gerber, A.;Korenblit, I. Ya.;Karpovsky, M.;Hacohen-Gourgy, S.;Tsukernik, A.;Tuaillon-Combes, J.;Melinon, P.;Perez, A.;
7:3:35:17     Indication for macroscopic quantum tunneling below 10 K in nanostructures of SrRuO3
DOI:10.1103/PhysRevB.86.100403  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Sinwani, Omer;Reiner, James W.;Klein, Lior;
7:3:35:18     Infrared anomalous Hall effect in CaxSr1-xRuO3 films
DOI:10.1103/PhysRevB.88.155101  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Kim, M. -H.;Tanaka, T.;Ellis, C. T.;Mukherjee, A.;Acbas, G.;Ohkubo, I.;Christen, H.;Mandrus, D.;Kontani, H.;Cerne, J.;
7:3:36:1     Magnetism of the tensile-strain-induced tetragonal state of SrRuO3 films
DOI:10.1103/PhysRevB.88.144412  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Herklotz, A.;Kataja, M.;Nenkov, K.;Biegalski, M. D.;Christen, H. -M.;Deneke, C.;Schultz, L.;Doerr, K.;
7:3:36:2     Enhanced magnetism in epitaxial SrRuO3 thin films
DOI:10.1063/1.3327512  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Grutter, Alexander;Wong, Franklin;Arenholz, Elke;Liberati, Marco;Vailionis, Arturas;Suzuki, Yuri;
7:3:36:3     Evidence of high-spin Ru and universal magnetic anisotropy in SrRuO3 thin films
DOI:10.1103/PhysRevB.85.134429  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Grutter, A. J.;Wong, F. J.;Arenholz, E.;Vailionis, A.;Suzuki, Y.;
7:3:36:4     Anisotropic lattice changes and ferromagnetic order in Sr1-xCaxRuO3
DOI:10.1103/PhysRevB.83.144430  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Wissinger, M.;Fuchs, D.;Dieterle, L.;Leiste, H.;Schneider, R.;Gerthsen, D.;Loehneysen, H. V.;
7:3:36:5     Low-Energy Electronic Properties of Clean CaRuO3: Elusive Landau Quasiparticles
DOI:10.1103/PhysRevLett.112.206403  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:2  AU: Schneider, M.;Geiger, D.;Esser, S.;Pracht, U. S.;Stingl, C.;Tokiwa, Y.;Moshnyaga, V.;Sheikin, I.;Mravlje, J.;Scheffler, M.;Gegenwart, P.;
7:3:36:6     Microstructure and properties of epitaxial La0.7Sr0.3MnO3/BaTiO3 bilayer film grown by pulsed laser deposition
DOI:10.1016/j.tsf.2013.08.050  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Wang, X. W.;Zhang, Y. Q.;Wang, X.;Wang, Z. J.;Zhu, Y. L.;Zhang, Z. D.;
7:3:36:7     Dependence of magnetism on GdFeO3 distortion in the t(2g) system ARuO(3) (A = Sr, Ca)
DOI:10.1103/PhysRevB.83.014416  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Middey, Srimanta;Mahadevan, Priya;Sarma, D. D.;
7:3:36:8     Modification of magnetic properties through the control of growth orientation and epitaxial strain in SrRuO3 thin films
DOI:10.1063/1.3334727  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Lee, B. W.;Jung, C. U.;
7:3:36:9     Magnetic anisotropy and metal-insulator transition in SrRuO3 thin films at different growth temperatures
DOI:10.1063/1.3431459  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Wang, X. W.;Wang, X.;Zhang, Y. Q.;Zhu, Y. L.;Wang, Z. J.;Zhang, Z. D.;
7:3:36:10     Enhanced magnetization in epitaxial SrRuO3 thin films via substrate-induced strain
DOI:10.1063/1.3360345  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Grutter, Alexander;Wong, Franklin;Arenholz, Elke;Liberati, Marco;Suzuki, Yuri;
7:3:36:11     Microstructure and ferroelectric properties of epitaxial BaTiO3/SrRuO3/SrTiO3 (001) films grown by pulsed laser deposition under high oxygen pressure
DOI:10.1016/j.tsf.2011.12.025  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Wang, X. W.;Wang, X.;Gong, W. J.;Zhang, Y. Q.;Zhu, Y. L.;Wang, Z. J.;Zhang, Z. D.;
7:3:36:12     Evolution of itinerant ferromagnetism in SrxPb1-xRuO3 (0 <= x <= 1): Interplay between Jahn-Teller distortion and A-site disorder
DOI:10.1063/1.3567536  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Lu, Hai-Shuang;Jua, Sheng;
7:3:36:13     TEM study of SrIrO3 thin films with various thicknesses grown on (001) SrTiO3 substrates synthesized by pulsed laser deposition
DOI:10.1016/j.apsusc.2013.04.150  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:6  AU: Zhang, Lunyong;Wu, Hong-Yan;Zhou, Jian;Wu, Fei-Xiang;Chen, Y. B.;Yao, Shu-Hua;Zhang, Shan-Tao;Chen, Yan-Feng;
7:3:36:14     Role of Ru vacancies in the magnetism of strain relaxed SrRuO3 films on SrTiO3 substrates
DOI:10.1063/1.3561768  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Bohra, Murtaza;Wu, C. P.;Yeh, H. J.;Cheng, Y. H.;Peng, C. C.;Chou, H.;
7:3:36:15     Magnetic anisotropy and transport properties of 70 nm SrRuO3 films grown on different substrates
DOI:10.1063/1.3540669  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Wang, X. W.;Zhang, Y. Q.;Meng, H.;Wang, Z. J.;Li, D.;Zhang, Z. D.;
7:3:36:16     Microstructure tuning of epitaxial BaTiO3 (-) (x) thin films grown using laser molecular-beam epitaxy by varying the oxygen pressure
DOI:10.1016/j.tsf.2009.09.103  JN:THIN SOLID FILMS  PY:2010
  TC:5  AU: Zhu, Y. L.;Zheng, S. J.;Chen, D.;Ma, X. L.;
7:3:36:17     Giant ferromagnetism and exchange bias in tensile strained and Cr modified CaRuO3 thin films
DOI:10.1063/1.4869977  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kumar, Sanjay;Tripathi, Shivendra;Phanendra, Eswara V.;Singh, R. S.;Rana, D. S.;
7:3:36:18     Thermoelectric properties of Ca1-xSrxRuO3 compounds prepared by spark plasma sintering
DOI:10.1016/j.jallcom.2012.01.150  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:1  AU: Keawprak, Nittaya;Tu, Rong;Goto, Takashi;
7:3:36:19     Structural expansion and suppression of spiral spin state in Pb-doped BiFeO3 (00l) epitaxial thin films
DOI:10.1063/1.3678451  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Bohra, Murtaza;Wu, C. P.;Yeh, H. J.;Chou, H.;Chen, W. C.;Lin, J. W.;Lin, J. G.;
7:3:36:20     Magnetism in CaMnO3 thin films
DOI:10.1063/1.4864044  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Flint, C. L.;Grutter, A. J.;Jenkins, C. A.;Arenholz, E.;Suzuki, Y.;
7:3:36:21     Microstructure and ferromagnetic property in CaRuO3 thin films with pseudoheterostructure
DOI:10.1063/1.3422476  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Chen, Y. B.;Zhou, Jian;Wu, Fei-xiang;Ji, Wei-jing;Zhang, Shan-Tao;Chen, Yan-Feng;Zhu, Yong-Yuan;
7:3:36:22     Structural, electrical, and magnetic properties of SrRuO3 thin films
DOI:10.1063/1.4866775  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Kaur, Pawanpreet;Sharma, K. K.;Pandit, Rabia;Choudhary, R. J.;Kumar, Ravi;
7:3:37:1     Origin of the superior conductivity of perovskite Ba(Sr)SnO3
DOI:10.1063/1.4798325  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:14  AU: Liu, Heng-Rui;Yang, Ji-Hui;Xiang, H. J.;Gong, X. G.;Wei, Su-Huai;
7:3:37:2     High carrier mobility in transparent Ba1-xLaxSnO3 crystals with a wide band gap
DOI:10.1063/1.4709415  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:23  AU: Luo, X.;Oh, Y. S.;Sirenko, A.;Gao, P.;Tyson, T. A.;Char, K.;Cheong, S-W.;
7:3:37:3     Physical properties of transparent perovskite oxides (Ba, La)SnO3 with high electrical mobility at room temperature
DOI:10.1103/PhysRevB.86.165205  JN:PHYSICAL REVIEW B  PY:2012
  TC:14  AU: Kim, Hyung Joon;Kim, Useong;Kim, Tai Hoon;Kim, Jiyeon;Kim, Hoon Min;Jeon, Byung-Gu;Lee, Woong-Jhae;Mun, Hyo Sik;Hong, Kwang Taek;Yu, Jaejun;Char, Kookrin;Kim, Kee Hoon;
7:3:37:4     La-doped BaSnO3-Degenerate perovskite transparent conducting oxide: Evidence from synchrotron x-ray spectroscopy
DOI:10.1063/1.4816511  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Sallis, S.;Scanlon, D. O.;Chae, S. C.;Quackenbush, N. F.;Fischer, D. A.;Woicik, J. C.;Guo, J. -H.;Cheong, S. W.;Piper, L. F. J.;
7:3:37:5     High mobility field effect transistor based on BaSnO3 with Al2O3 gate oxide
DOI:10.1063/1.4901963  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Park, Chulkwon;Kim, Useong;Ju, Chan Jong;Park, Ji Sung;Kim, Young Mo;Char, Kookrin;
7:3:37:6     Strain effects on the band gap and optical properties of perovskite SrSnO3 and BaSnO3
DOI:10.1063/1.4861838  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Singh, David J.;Xu, Qiang;Ong, Khuong P.;
7:3:37:7     Dopant-site-dependent scattering by dislocations in epitaxial films of perovskite semiconductor BaSnO3
DOI:10.1063/1.4874895  JN:APL MATERIALS  PY:2014
  TC:4  AU: Kim, Useong;Park, Chulkwon;Ha, Taewoo;Kim, Rokyeon;Mun, Hyo Sik;Kim, Hoon Min;Kim, Hyung Joon;Kim, Tai Hoon;Kim, Namwook;Yu, Jaejun;Kim, Kee Hoon;Kim, Jae Hoon;Char, Kookrin;
7:3:37:8     Improved electrical mobility in highly epitaxial La:BaSnO3 films on SmScO3(110) substrates
DOI:10.1063/1.4891816  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Wadekar, P. V.;Alaria, J.;O'Sullivan, M.;Flack, N. L. O.;Manning, T. D.;Phillips, L. J.;Durose, K.;Lozano, O.;Lucas, S.;Claridge, J. B.;Rosseinsky, M. J.;
7:3:37:9     Indications of strong neutral impurity scattering in Ba(Sn,Sb)O-3 single crystals
DOI:10.1103/PhysRevB.88.125204  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kim, Hyung Joon;Kim, Jiyeon;Kim, Tai Hoon;Lee, Woong-Jhae;Jeon, Byung-Gu;Park, Ju-Young;Choi, Woo Seok;Jeong, Da Woon;Lee, Suk Ho;Yu, Jaejun;Noh, Tae Won;Kim, Kee Hoon;
7:3:37:10     Composition dependent metal-semiconductor transition in transparent and conductive La-doped BaSnO3 epitaxial films
DOI:10.1063/1.4770299  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Liu, Qinzhuang;Liu, Jianjun;Li, Bing;Li, Hong;Zhu, Guangping;Dai, Kai;Liu, Zhongliang;Zhang, Peng;Dai, Jianming;
7:3:37:11     Large effects of dislocations on high mobility of epitaxial perovskite Ba0.96La0.04SnO3 films
DOI:10.1063/1.4812642  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Mun, Hyosik;Kim, Useong;Kim, Hoon Min;Park, Chulkwon;Kim, Tai Hoon;Kim, Hyung Joon;Kim, Kee Hoon;Char, Kookrin;
7:3:37:12     Infrared-optical spectroscopy of transparent conducting perovskite (La,Ba)SnO3 thin films
DOI:10.1063/1.4861776  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Seo, Dongmin;Yu, Kwangnam;Chang, Young Jun;Sohn, Egon;Kim, Kee Hoon;Choi, E. J.;
7:3:37:13     High-temperature thermoelectric properties of La-doped BaSnO3 ceramics
DOI:10.1016/j.mseb.2009.10.002  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:14  AU: Yasukawa, Masahiro;Kono, Toshio;Ueda, Kazushige;Yanagi, Hiroshi;Hosono, Hideo;
7:3:37:14     Electronic band structure and optical phonons of BaSnO3 and Ba0.97La0.03SnO3 single crystals: Theory and experiment
DOI:10.1063/1.4748309  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:13  AU: Stanislavchuk, T. N.;Sirenko, A. A.;Litvinchuk, A. P.;Luo, X.;Cheong, S. -W.;
7:3:37:15     Influence of charged-dislocation density variations on carrier mobility in heteroepitaxial semiconductors: The case of SnO2 on sapphire
DOI:10.1103/PhysRevB.86.245315  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;
7:3:38:1     Interfacial spin glass state and exchange bias in manganite bilayers with competing magnetic orders
DOI:10.1103/PhysRevB.87.054428  JN:PHYSICAL REVIEW B  PY:2013
  TC:15  AU: Ding, J. F.;Lebedev, O. I.;Turner, S.;Tian, Y. F.;Hu, W. J.;Seo, J. W.;Panagopoulos, C.;Prellier, W.;Van Tendeloo, G.;Wu, T.;
7:3:38:2     Phase evolution and critical behavior in strain-tuned LaMnO3-SrMnO3 superlattices
DOI:10.1103/PhysRevB.81.014410  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Yamada, Hiroyuki;Xiang, Ping-Hua;Sawa, Akihito;
7:3:38:3     Magnetic and orbital order in (RMnO3)(n)/(AMnO(3))(2n) superlattices studied via a double-exchange model with strain
DOI:10.1103/PhysRevB.86.205121  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Dong, Shuai;Zhang, Qinfang;Yunoki, Seiji;Liu, J-M;Dagotto, Elbio;
7:3:38:4     Exchange bias in a single LaMnO3 film induced by vertical electronic phase separation
DOI:10.1103/PhysRevB.89.165129  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Peng, J. J.;Song, C.;Cui, B.;Li, F.;Mao, H. J.;Wang, Y. Y.;Wang, G. Y.;Pan, F.;
7:3:38:5     Optical Properties of (SrMnO3)(n)/(LaMnO3)(2n) Superlattices: An Insulator-to-Metal Transition Observed in the Absence of Disorder
DOI:10.1021/nl1022628  JN:NANO LETTERS  PY:2010
  TC:13  AU: Perucchi, Andrea;Baldassarre, Leonetta;Nucara, Alessandro;Calvani, Paolo;Adamo, Carolina;Schlom, Darrell G.;Orgiani, Pasquale;Maritato, Luigi;Lupi, Stefano;
7:3:38:6     Electronic band redistribution probed by oxygen absorption spectra of (SrMnO3)(n)( LaMnO3)(2n) superlattices
DOI:10.1103/PhysRevB.85.125129  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Galdi, A.;Aruta, C.;Orgiani, P.;Adamo, C.;Bisogni, V.;Brookes, N. B.;Ghiringhelli, G.;Schlom, D. G.;Thakur, P.;Maritato, L.;
7:3:38:7     Strain-engineered magnetic order in (LaMnO3)(n)/(SrMnO3)(2n) superlattices
DOI:10.1103/PhysRevB.86.094403  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Zhang, Qinfang;Dong, Shuai;Wang, Baolin;Yunoki, Seiji;
7:3:38:8     Magnetic properties and electronic structures of (YTiO3)(2)/(BaTiO3)(n) superlattices
DOI:10.1063/1.4863489  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Zhou, P. X.;Liu, H. M.;Yan, Z. B.;Dong, S.;Liu, J. -M.;
7:3:38:9     Tunable Magnetic Interaction at the Atomic Scale in Oxide Heterostructures
DOI:10.1103/PhysRevLett.105.167206  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:9  AU: Seo, J. W.;Prellier, W.;Padhan, P.;Boullay, P.;Kim, J-Y;Lee, Hangil;Batista, C. D.;Martin, I.;Chia, Elbert E. M.;Wu, T.;Cho, B-G.;Panagopoulos, C.;
7:3:38:10     Electron-lattice and strain effects in manganite heterostructures: The case of a single interface
DOI:10.1103/PhysRevB.83.085107  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Iorio, A.;Perroni, C. A.;Ramaglia, V. Marigliano;Cataudella, V.;
7:3:38:11     Magnetic and transport characteristics of long-period [(LaMnO3)(n)/(SrMnO3)(n)](m) (n >= 3) superlattices
DOI:10.1063/1.4767227  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Wang, Geming;Du, Ruifang;Wu, Di;Li, Aidong;
7:3:38:12     Relaxor characteristics at the interfaces of NdMnO3/SrMnO3/LaMnO3 superlattices
DOI:10.1103/PhysRevB.82.140405  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Seo, Jiwon;Phan, Bach T.;Stahn, Jochen;Lee, Jaichan;Panagopoulos, Christos;
7:3:38:13     Strain-engineered A-type antiferromagnetic order in YTiO3: A first-principles calculation
DOI:10.1063/1.4793644  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Huang, Xin;Tang, Yankun;Dong, Shuai;
7:3:38:14     Thickness and ordering temperature of surface NiO/Ni systems
DOI:10.1063/1.4866980  JN:AIP ADVANCES  PY:2014
  TC:2  AU: Shih, Ying-Ta;Su, Chien-Yu;Tsai, Chung-Wei;Pan, Wei;
7:3:38:15     Shear-induced low-dimension electron transport in (LaMnO3)(2)/(SrMnO3)(2) superlattice
DOI:10.1007/s00339-011-6607-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Cao, Dan;Zheng, Yue;Woo, C. H.;
7:3:38:16     Magnetic orders of LaTiO3 under epitaxial strain: A first-principles study
DOI:10.1063/1.4860016  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Weng, Yakui;Huang, Xin;Tang, Yankun;Dong, Shuai;
7:3:38:17     Metallic characteristics in superlattices composed of insulators, NdMnO3/SrMnO3/LaMnO3
DOI:10.1063/1.3583586  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Seo, J. W.;Phan, B. T.;Lee, J.;Kim, H. -D.;Panagopoulos, C.;
7:3:38:18     Exchange interaction, electronic structure and magnetic properties of (LaMnO3)(m)/(SrTiO3)(n) superlattices: Ab initio study
DOI:10.1016/j.jallcom.2013.10.242  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Aezami, A.;Abolhassani, M.;Elahi, M.;
7:3:39:1     High-T-C ferromagnetic order in CaRuO3/La2/3Ca1/3MnO3 superlattices
DOI:10.1063/1.4857715  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Chen, P. F.;Chen, B. B.;Tan, X. L.;Xu, H. R.;Xuan, X. F.;Guo, Z.;Jin, F.;Wu, W. B.;
7:3:39:2     Charge transport and magnetization profile at the interface between the correlated metal CaRuO3 and the antiferromagnetic insulator CaMnO3
DOI:10.1103/PhysRevB.81.094414  JN:PHYSICAL REVIEW B  PY:2010
  TC:19  AU: Freeland, J. W.;Chakhalian, J.;Boris, A. V.;Tonnerre, J. -M.;Kavich, J. J.;Yordanov, P.;Grenier, S.;Zschack, P.;Karapetrova, E.;Popovich, P.;Lee, H. N.;Keimer, B.;
7:3:39:3     Interfacial magnetic coupling in ultrathin all-manganite La0.7Sr0.3MnO3-TbMnO3 superlattices
DOI:10.1063/1.4871701  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Tian, Y. F.;Lebedev, O. I.;Roddatis, V. V.;Lin, W. N.;Ding, J. F.;Hu, S. J.;Yan, S. S.;Wu, T.;
7:3:39:4     Contrasting size-scaling behavior of ferromagnetism in La0.67Ca0.33MnO3 films and La0.67Ca0.33MnO3/CaRuO3 multilayers
DOI:10.1063/1.4885080  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chen, B. B.;Chen, P. F.;Xu, H. R.;Tan, X. L.;Jin, F.;Guo, Z.;Zhi, B. W.;Wu, W. B.;
7:3:39:5     Interfacial Ferromagnetism and Exchange Bias in CaRuO3/CaMnO3 Superlattices
DOI:10.1103/PhysRevLett.109.197202  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:14  AU: He, C.;Grutter, A. J.;Gu, M.;Browning, N. D.;Takamura, Y.;Kirby, B. J.;Borchers, J. A.;Kim, J. W.;Fitzsimmons, M. R.;Zhai, X.;Mehta, V. V.;Wong, F. J.;Suzuki, Y.;
7:3:39:6     Stabilization of Ferromagnetic Order in La0.7Sr0.3MnO3-SrRuO3 Superlattices
DOI:10.1021/nl301963a  JN:NANO LETTERS  PY:2012
  TC:15  AU: Ziese, M.;Bern, F.;Pippel, E.;Hesse, D.;Vrejoiu, I.;
7:3:39:7     Interface Effects in Perovskite Thin Films
DOI:10.1103/PhysRevLett.108.087202  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:18  AU: Lepetit, Marie-Bernadette;Mercey, Bernard;Simon, Charles;
7:3:39:8     Interfacial Ferromagnetism in LaNiO3/CaMnO3 Superlattices
DOI:10.1103/PhysRevLett.111.087202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Grutter, A. J.;Yang, H.;Kirby, B. J.;Fitzsimmons, M. R.;Aguiar, J. A.;Browning, N. D.;Jenkins, C. A.;Arenholz, E.;Mehta, V. V.;Alaan, U. S.;Suzuki, Y.;
7:3:39:9     Delta Doping of Ferromagnetism in Antiferromagnetic Manganite Superlattices
DOI:10.1103/PhysRevLett.107.167202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:10  AU: Santos, T. S.;Kirby, B. J.;Kumar, S.;May, S. J.;Borchers, J. A.;Maranville, B. B.;Zarestky, J.;Velthuis, S. G. E. Te;van den Brink, J.;Bhattacharya, A.;
7:3:39:10     Electronic and magnetic reconstructions in manganite superlattices
DOI:10.1103/PhysRevB.87.155152  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Pradhan, Kalpataru;Kampf, Arno P.;
7:3:39:11     Interfacial magnetism in CaRuO3/CaMnO3 superlattices grown on (001) SrTiO3
DOI:10.1063/1.3561448  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: He, C.;Zhai, X.;Mehta, V. V.;Wong, F. J.;Suzuki, Y.;
7:3:39:12     Interface-controlled magnetism and transport of ultrathin manganite films
DOI:10.1063/1.4795422  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Shapoval, O.;Huehn, S.;Verbeeck, J.;Jungbauer, M.;Belenchuk, A.;Moshnyaga, V.;
7:3:39:13     Interfacial magnetism in manganite superlattices
DOI:10.1103/PhysRevB.88.115136  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Pradhan, Kalpataru;Kampf, Arno P.;
7:3:40:1     Recovery of oscillatory magneto-resistance in phase separated La0.3Pr0.4Ca0.3MnO3 epitaxial thin films
DOI:10.1063/1.4839536  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Alagoz, H. S.;Jeon, J.;Mahmud, S. T.;Saber, M. M.;Prasad, B.;Egilmez, M.;Chow, K. H.;Jung, J.;
7:3:40:2     Pseudomorphic strain induced strong anisotropic magnetoresistance over a wide temperature range in epitaxial La0.67Ca0.33MnO3/NdGaO3(001) films
DOI:10.1063/1.3524193  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Wang, L. F.;Huang, Z.;Tan, X. L.;Chen, P. F.;Zhi, B. W.;Li, G. M.;Wu, W. B.;
7:3:40:3     Anisotropic magnetoresistance of epitaxial Pr0.5Sr0.5MnO3 film
DOI:10.1063/1.4862646  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Chen, X. G.;Yang, J. B.;Yang, Y. B.;Wang, C. S.;Liu, S. Q.;Zhang, Y.;Han, J. Z.;Yang, Y. C.;
7:3:40:4     Angular dependent magnetoresistance with twofold and fourfold symmetries in A-type antiferromagnetic Nd0.45Sr0.55MnO3 thin film
DOI:10.1063/1.3507262  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Zhang, Y. Q.;Meng, H.;Wang, X. W.;Wang, X.;Guo, H. H.;Zhu, Y. L.;Yang, T.;Zhang, Z. D.;
7:3:40:5     Influence of A-site doping and strain on the relationship between the anisotropic magneto-resistance and charge localization in films of La0.7-xPrxCa0.3MnO3 manganites
DOI:10.1063/1.4811415  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Alagoz, H. S.;Khan, M.;Saber, M. M.;Mahmud, S. T.;Chow, K. H.;Jung, J.;
7:3:40:6     Phase separation and enhanced magnetoresistance in the strained epitaxial La0.625Ca0.375MnO3 (001) films
DOI:10.1063/1.3695376  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Han, Yunxin;Wu, Wenbin;Jiang, Guoshun;Zhu, Changfei;
7:3:40:7     Unusual anisotropic magnetoresistance in charge-orbital ordered Nd0.5Sr0.5MnO3 polycrystals
DOI:10.1063/1.4904437  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Yang, Huali;Wang, Baomin;Liu, Yiwei;Yang, Zhihuan;Zhu, Xiaojian;Xie, Yali;Zuo, Zhenghu;Chen, Bin;Zhan, Qingfeng;Wang, Junling;Li, Run-Wei;
7:3:40:8     Correlation between the ferromagnetic metal percolation and the sign evolution of angular dependent magnetoresistance in Pr0.7Ca0.3MnO3 film
DOI:10.1063/1.3670399  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Zhang, Y. Q.;Meng, H.;Wang, X. W.;Liu, J. J.;Du, J.;Zhang, Z. D.;
7:3:40:9     Giant anisotropic magnetoresistance in bilayered La1.2Sr1.8Mn2O7 single crystals
DOI:10.1063/1.3593486  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Ning, Wei;Qu, Zhe;Zou, You-Ming;Ling, Lang-Sheng;Zhang, Lei;Xi, Chuan-Ying;Du, Hai-Feng;Li, Run-Wei;Zhang, Yu-Heng;
7:3:40:10     Carrier localization and out of plane anisotropic magnetoresistance in Nd0.55-xSmxSr0.45MnO3 thin films
DOI:10.1063/1.4722815  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Srivastava, M. K.;Kaur, A.;Singh, H. K.;
7:3:40:11     Strain induced tunable anisotropic magnetoresistance in La0.67Ca0.33MnO3/BaTiO3 heterostructures
DOI:10.1063/1.4795841  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Xie, Yali;Yang, Huali;Liu, Yiwei;Yang, Zhihuan;Chen, Bin;Zuo, Zhenghu;Katlakunta, Sadhana;Zhan, Qingfeng;Li, Run-Wei;
7:3:40:12     Anisotropic magnetoresistance and planar Hall effect in La2/3Ca1/3MnO3 thin films with misfit strain
DOI:10.1063/1.4789969  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Li, J.;Wang, S. G.;Zhang, Y.;Cui, L. M.;Jin, Y. R.;Deng, H.;Zheng, D. N.;Zimmers, A.;Aubin, H.;Lang, P. L.;
7:3:40:13     Sign reversal of anisotropic magnetoresistance in La0.7Ca0.3MnO3/SrTiO3 ultrathin films
DOI:10.1063/1.4903236  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Sharma, Himanshu;Tulapurkar, A.;Tomy, C. V.;
7:3:40:14     Anisotropic magnetoresistance in low-doped La0.79Ca0.21MnO3 crystals
DOI:10.1063/1.3556746  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Yuzhelevski, Ya.;Markovich, V.;Jung, G.;Gorodetsky, G.;
7:3:40:15     Evolution of the conducting phase topology at the percolation threshold in colossal magnetoresistance manganites: A magnetic small-angle neutron scattering study
DOI:10.1103/PhysRevB.82.054427  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Saurel, Damien;Simon, Charles;Pautrat, Alain;Martin, Christine;Dewhurst, Charles;Brulet, Annie;
7:3:40:16     Microstructural, magnetic and transport properties of La0.5Pr0.2Pb0.3-xSrxMnO3 manganites
DOI:10.1016/j.jallcom.2014.01.002  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Craus, M. -L.;Islamov, A. Kh.;Anitas, E. M.;Cornei, N.;Luca, D.;
7:3:40:17     Anisotropic magnetoresistance in low-doped La0.78Ca0.22MnO3 crystals
DOI:10.1063/1.3536515  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Markovich, V.;Jung, G.;Yuzhelevski, Ya.;Gorodetsky, G.;Mukovskii, Ya. M.;
7:3:40:18     Anisotropic transport behavior of orbital-ordered Nd0.48Sr0.52MnO3 films
DOI:10.1063/1.3657845  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Liang, S.;Sun, J. R.;Chen, Y. Z.;Shen, B. G.;
7:3:40:19     Low field anisotropic colossal magnetoresistance in Sm0.53Sr0.47MnO3 thin films
DOI:10.1063/1.3672838  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Srivastava, Manoj K.;Singh, M. P.;Kaur, Amarjeet;Razavi, F. S.;Singh, H. K.;
7:3:41:1     Evidence of direct correlation between out-of-plane lattice parameter and metal-insulator transition temperature in oxygen-depleted manganite thin films
DOI:10.1063/1.3676268  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:15  AU: Orgiani, P.;Petrov, A. Yu.;Ciancio, R.;Galdi, A.;Maritato, L.;Davidson, B. A.;
7:3:41:2     Effects of Au nanoparticles on the magnetic and transport properties of La0.67Sr0.33MnO3 ultrathin layers
DOI:10.1103/PhysRevB.81.094410  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Brivio, S.;Magen, C.;Sidorenko, A. A.;Petti, D.;Cantoni, M.;Finazzi, M.;Ciccacci, F.;De Renzi, R.;Varela, M.;Picozzi, S.;Bertacco, R.;
7:3:41:3     Room temperature spontaneous exchange bias in (La,Sr)MnO3/PbZr0.8Ti0.2O3/(La,Sr)MnO3 sandwich structure
DOI:10.1063/1.4816481  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Mao, H. J.;Song, C.;Cui, B.;Wang, G. Y.;Xiao, L. R.;Pan, F.;
7:3:41:4     Interfacial effects in manganite thin films with different capping layers of interest for spintronic applications
DOI:10.1103/PhysRevB.84.024413  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Valencia, S.;Konstantinovic, Z.;Schmitz, D.;Gaupp, A.;Balcells, Ll;Martinez, B.;
7:3:41:5     Improved tunneling magnetoresistance at low temperature in manganite junctions grown by molecular beam epitaxy
DOI:10.1063/1.3581885  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Werner, R.;Petrov, A. Yu.;Alvarez Mino, L.;Kleiner, R.;Koelle, D.;Davidson, B. A.;
7:3:41:6     Near-room-temperature control of magnetization in field effect devices based on La0.67Sr0.33MnO3 thin films
DOI:10.1063/1.3516283  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Brivio, S.;Cantoni, M.;Petti, D.;Bertacco, R.;
7:3:41:7     Exchange bias coupling of Co with ultrathin La2/3Sr1/3MnO3 films
DOI:10.1063/1.4754594  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Shi, Y. J.;Zhou, Y.;Ding, H. F.;Zhang, F. M.;Pi, L.;Zhang, Y. H.;Wu, D.;
7:3:41:8     Crucial role played by interface and oxygen content in magnetic properties of ultrathin manganite films
DOI:10.1063/1.4812302  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Wang, Cong;Jin, Kui-juan;Gu, Lin;Lu, Hui-bin;Li, Shan-ming;Zhou, Wen-jia;Zhao, Rui-qiang;Guo, Hai-zhong;He, Meng;Yang, Guo-zhen;
7:3:41:9     Measuring magnetic profiles at manganite surfaces with monolayer resolution
DOI:10.1016/j.jmmm.2009.05.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:9  AU: Verna, A.;Davidson, Bruce A.;Szeto, Y.;Petrov, A. Yu.;Mirone, A.;Giglia, A.;Mahne, N.;Nannarone, S.;
7:3:41:10     Magnetoelectric transport and quantum interference effect in ultrathin manganite films
DOI:10.1063/1.4873337  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wang, Cong;Jin, Kui-juan;Gu, Lin;Lu, Hui-bin;Li, Shan-ming;Zhou, Wen-jia;Zhao, Rui-qiang;Guo, Hai-zhong;He, Meng;Yang, Guo-zhen;
7:3:41:11     Effect of Au proximity on the LSMO surface: An ab initio study
DOI:10.1016/j.jmmm.2012.03.038  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:0  AU: Petti, D.;Stroppa, A.;Picozzi, S.;Brivio, S.;Cantoni, M.;Bertacco, R.;
7:3:41:12     Effect of the capping on the local Mn oxidation state in buried (001) and (110) SrTiO3/La2/3Ca1/3MnO3 interfaces
DOI:10.1063/1.3660786  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Estrade, S.;Rebled, J. M.;Walls, M. G.;de la Pena, F.;Colliex, C.;Cordoba, R.;Infante, I. C.;Herranz, G.;Sanchez, F.;Fontcuberta, J.;Peiro, F.;
7:3:41:13     Interfacial effects in La2/3Sr1/3MnO3 thin films with different complex oxide capping layers
DOI:10.1063/1.3545814  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Valencia, S.;Konstantinovic, Z.;Gaupp, A.;Schmitz, D.;Balcells, Ll.;Martinez, B.;
7:3:41:14     Magnetic anisotropy in strained manganite films and bicrystal junctions
DOI:10.1063/1.4802659  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Demidov, V. V.;Ovsyannikov, G. A.;Petrzhik, A. M.;Borisenko, I. V.;Shadrin, A. V.;Gunnarsson, R.;
7:3:41:15     Tuning La0.67Sr0.33MnO3 surface magnetism using LaMnO3 and SrTiO3 caps
DOI:10.1016/j.jmmm.2013.10.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Phillips, L. C.;Maccherozzi, F.;Moya, X.;Ghidini, M.;Yan, W.;Soussi, J.;Dhesi, S. S.;Mathur, N. D.;
7:3:42:1     Electronic and structural properties of the oxygen vacancy in BaTiO3
DOI:10.1063/1.3583460  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:14  AU: Choi, Minseok;Oba, Fumiyasu;Tanaka, Isao;
7:3:42:2     Controlling Interface Intermixing and Properties of SrTiO3-Based Superlattices
DOI:10.1002/adfm.201100230  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:10  AU: Mizoguchi, Teruyasu;Ohta, Hiromichi;Lee, Hak-Sung;Takahashi, Nobuaki;Ikuhara, Yuichi;
7:3:42:3     First-principles study on migration mechanism in SrTiO3
DOI:10.1063/1.3560464  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Mizoguchi, Teruyasu;Takahashi, Nobuaki;Lee, Hak-Sung;
7:3:42:4     Electronic reconstruction at n-type SrTiO3/OLaAlO3 interfaces
DOI:10.1103/PhysRevB.81.085113  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Verbeeck, J.;Bals, S.;Kravtsova, A. N.;Lamoen, D.;Luysberg, M.;Huijben, M.;Rijnders, G.;Brinkman, A.;Hilgenkamp, H.;Blank, D. H. A.;Van Tendeloo, G.;
7:3:42:5     Strontium migration assisted by oxygen vacancies in SrTiO3 from classical and quantum mechanical simulations
DOI:10.1103/PhysRevB.83.220301  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Walsh, Aron;Catlow, C. Richard A.;Smith, Alastair G. H.;Sokol, Alexey A.;Woodley, Scott M.;
7:3:42:6     Defect energetics in LaAlO3 polymorphs: A first-principles study
DOI:10.1103/PhysRevB.86.094117  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Yamamoto, Takashi;Mizoguchi, Teruyasu;
7:3:42:7     The influence of neighboring vacancies and their charge state on the atomic migration of LaAlO3
DOI:10.1063/1.4807818  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Yamamoto, Takashi;Mizoguchi, Teruyasu;
7:3:42:8     Importance of Fermi energy for understanding the intermixing behavior at the LaAlO3/SrTiO3 heterointerface
DOI:10.1063/1.4902314  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yamamoto, Takashi;Mizoguchi, Teruyasu;
7:3:42:9     Impact of vacancy clusters on characteristic resistance change of nonstoichiometric strontium titanate nano-film
DOI:10.1063/1.4860961  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Kim, Yong Su;Kim, Jiyeon;Yoon, Moon Jee;Sohn, Chang Hee;Lee, Shin Buhm;Lee, Daesu;Jeon, Byung Chul;Yoo, Hyang Keun;Noh, Tae Won;Bostwick, Aaron;Rotenberg, Eli;Yu, Jaejun;Bu, Sang Don;Mun, Bongjin Simon;
7:3:42:10     Energetics and electronic structure of La/Sr disorder at the interface of SrTiO3/LaTiO3 heterostructure
DOI:10.1063/1.3629786  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Pulikkotil, J. J.;Auluck, S.;Kumar, Pramod;Dogra, Anjana;Budhani, R. C.;
7:3:42:11     Diversity of hydrogen configuration and its roles in SrTiO3-delta
DOI:10.1063/1.4854355  JN:APL MATERIALS  PY:2014
  TC:2  AU: Iwazaki, Yoshiki;Gohda, Yoshihiro;Tsuneyuki, Shinji;
7:3:42:12     Evolution of multiple dielectric responses and relaxor-like behaviors in pure and nitrogen-ion-implanted (Ba, Sr)TiO3 thin films
DOI:10.1063/1.4869477  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Gao, Y. H.;Yang, J.;Shen, H.;Sun, J. L.;Meng, X. J.;Chu, J. H.;
7:3:42:13     Cr diffusion in alpha-Al2O3: Secondary ion mass spectroscopy and first-principles study
DOI:10.1103/PhysRevB.82.174302  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Takahashi, Nobuaki;Mizoguchi, Teruyasu;Nakagawa, Tsubasa;Tohei, Tetsuya;Sakaguchi, Isao;Kuwabara, Akihide;Shibata, Naoya;Yamamoto, Takahisa;Ohashi, Naoki;Ikuhara, Yuichi;
7:3:43:1     Versatile helimagnetic phases under magnetic fields in cubic perovskite SrFeO3
DOI:10.1103/PhysRevB.84.054427  JN:PHYSICAL REVIEW B  PY:2011
  TC:22  AU: Ishiwata, S.;Tokunaga, M.;Kaneko, Y.;Okuyama, D.;Tokunaga, Y.;Wakimoto, S.;Kakurai, K.;Arima, T.;Taguchi, Y.;Tokura, Y.;
7:3:43:2     Neutron diffraction study of spin and charge ordering in SrFeO3-delta
DOI:10.1103/PhysRevB.85.184109  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Reehuis, M.;Ulrich, C.;Maljuk, A.;Niedermayer, Ch.;Ouladdiaf, B.;Hoser, A.;Hofmann, T.;Keimer, B.;
7:3:43:3     Competing Exchange Interactions on the Verge of a Metal-Insulator Transition in the Two-Dimensional Spiral Magnet Sr3Fe2O7
DOI:10.1103/PhysRevLett.113.147206  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Kim, J. -H.;Jain, Anil;Reehuis, M.;Khaliullin, G.;Peets, D. C.;Ulrich, C.;Park, J. T.;Faulhaber, E.;Hoser, A.;Walker, H. C.;Adroja, D. T.;Walters, A. C.;Inosov, D. S.;Maljuk, A.;Keimer, B.;
7:3:43:4     First-principles calculation of helical spin order in iron perovskite SrFeO3 and BaFeO3
DOI:10.1103/PhysRevB.85.134419  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Li, Zhi;Laskowski, Robert;Iitaka, Toshiaki;Tohyama, Takami;
7:3:43:5     Pressure-induced ferromagnetism in cubic perovskite SrFeO3 and BaFeO3
DOI:10.1103/PhysRevB.86.094422  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Li, Zhi;Iitaka, Toshiaki;Tohyama, Takami;
7:3:43:6     Magnetic phase diagram of Sr3Fe2O7-delta
DOI:10.1103/PhysRevB.87.214410  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Peets, D. C.;Kim, J. -H.;Dosanjh, P.;Reehuis, M.;Maljuk, A.;Aliouane, N.;Ulrich, C.;Keimer, B.;
7:3:43:7     BaFeO3 cubic single crystalline thin film: A ferromagnetic insulator
DOI:10.1063/1.4824210  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Chakraverty, S.;Matsuda, T.;Ogawa, N.;Wadati, H.;Ikenaga, E.;Kawasaki, M.;Tokura, Y.;Hwang, H. Y.;
7:3:43:8     Exotic exchange bias at epitaxial ferroelectric-ferromagnetic interfaces
DOI:10.1063/1.4885316  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Paul, Amitesh;Reitinger, Christoph;Autieri, Carmine;Sanyal, Biplab;Kreuzpaintner, Wolfgang;Jutimoosik, Jaru;Yimnirun, Rattikorn;Bern, Francis;Esquinazi, Pablo;Korelis, Panagiotis;Boeni, Peter;
7:3:43:9     Density functional theory studies of the electronic and magnetic structure of GdxSr1-xFeO3 perovskite alloys
DOI:10.1016/j.mssp.2014.08.021  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:0  AU: Azzouz, M.;Kacimi, S.;Abderahmane, S. Ait;Bououdina, M.;Zaoui, A.;
7:3:43:10     Self-doping and the role of oxygen vacancies in the magnetic properties of cubic BaFeO3-delta
DOI:10.1063/1.4792664  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Ribeiro, B.;Godinho, M.;Cardoso, C.;Borges, R. P.;Gasche, T. P.;
7:3:43:11     Surface morphology, ferromagnetic domains and magnetic anisotropy in BaFeO3-delta thin films: Correlated structure and magnetism
DOI:10.1016/j.jmmm.2013.12.037  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:3  AU: Aziz, Fozia;Pandey, Parul;Chandra, Mahesh;Khare, Amit;Rana, D. S.;Mavani, K. R.;
7:3:43:12     Structural studies of SrFeO3 and SrFe0.5Nb0.5O3 by employing XRD and XANES spectroscopic techniques
DOI:10.1016/j.matchar.2011.07.014  JN:MATERIALS CHARACTERIZATION  PY:2011
  TC:6  AU: Akhtar, M. Javed;Khan, R. Tahir Ali;
7:3:43:13     Multiple helimagnetic phases and topological Hall effect in epitaxial thin films of pristine and Co-doped SrFeO3
DOI:10.1103/PhysRevB.88.220405  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:3:43:14     Structural and magnetic properties of thin films of BaFeO3-delta deposited by pulsed injection metal-organic chemical vapor deposition
DOI:10.1063/1.4729269  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Ribeiro, B.;Borges, R. P.;da Silva, R. C.;Franco, N.;Ferreira, P.;Alves, E.;Berini, B.;Fouchet, A.;Keller, N.;Godinho, M.;
7:3:43:15     Floating zone growth of large single crystals of SrFeO3-delta
DOI:10.1016/j.jcrysgro.2012.09.049  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:1  AU: Peets, D. C.;Kim, Jung-hwa;Reehuis, M.;Dosanjh, P.;Keimer, B.;
7:3:43:16     Variation of charge dynamics upon the helimagnetic and metal-insulator transitions for perovskite AFeO(3) (A = Sr and Ca)
DOI:10.1103/PhysRevB.85.155141  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Fujioka, J.;Ishiwata, S.;Kaneko, Y.;Taguchi, Y.;Tokura, Y.;
7:3:44:1     Epitaxy of polar semiconductor Co3O4 (110): Growth, structure, and characterization
DOI:10.1063/1.4885048  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Kormondy, Kristy J.;Posadas, Agham B.;Slepko, Alexander;Dhamdhere, Ajit;Smith, David J.;Mitchell, Khadijih N.;Willett-Gies, Travis I.;Zollner, Stefan;Marshall, Luke G.;Zhou, Jianshi;Demkov, Alexander A.;
7:3:44:2     Electronic structure and bonding properties of cobalt oxide in the spinel structure
DOI:10.1103/PhysRevB.83.245204  JN:PHYSICAL REVIEW B  PY:2011
  TC:23  AU: Chen, Jia;Wu, Xifan;Selloni, Annabella;
7:3:44:3     Nature of the band gap and origin of the electro-/photo-activity of Co3O4
DOI:10.1039/c3tc30861h  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:9  AU: Qiao, L.;Xiao, H. Y.;Meyer, H. M.;Sun, J. N.;Rouleau, C. M.;Puretzky, A. A.;Geohegan, D. B.;Ivanov, I. N.;Yoon, M.;Weber, W. J.;Biegalski, M. D.;
7:3:44:4     Electronic states and magnetic structure at the Co3O4(110) surface: A first-principles study
DOI:10.1103/PhysRevB.85.085306  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Chen, Jia;Selloni, Annabella;
7:3:44:5     Electronic Structure and Band Alignment at an Epitaxial Spinel/Perovskite Heterojunction
DOI:10.1021/am5036219  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:0  AU: Qiao, Liang;Li, Wei;Xiao, Haiyan;Meyer, Harry M.;Liang, Xuelei;Nguyen, N. V.;Weber, William J.;Biegalski, Michael D.;
7:3:44:6     Core-shell magnetic exchange model for Co3O4 nanowires
DOI:10.1063/1.4807393  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Chen, Lan;Yang, Yurong;Meng, Xiangkang;
7:3:44:7     Influence of the Arrangement of the Octahedrally Coordinated Trivalent Cobalt Cations on the Electrical Charge Transport and Surface Reactivity
DOI:10.1021/cm1004642  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:19  AU: Ngamou, Patrick Herve Tchoua;Bahlawane, Naoufal;
7:3:44:8     Evidence for surface states in a single 3 nm diameter Co3O4 nanowire
DOI:10.1063/1.3457449  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Sun, Yi;Yang, Ji-Yong;Xu, Rui;He, Lin;Dou, Rui-Fen;Nie, Jia-Cai;
7:3:44:9     The role of oxygen during the catalytic oxidation of ammonia on Co3O4(100)
DOI:10.1016/j.apsusc.2014.08.021  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:2  AU: Shojaee, Kambiz;Haynes, Brian S.;Montoya, Alejandro;
7:3:44:10     Scanning tunnelling microscope studies of angstrom-scale Co3O4 nanowires
DOI:10.1088/0957-4484/21/33/335605  JN:NANOTECHNOLOGY  PY:2010
  TC:7  AU: Sun, Yi;Xu, Rui;Yang, Ji-Yong;He, Lin;Nie, Jia-Cai;Dou, Rui-Fen;Zhou, Wei;Guo, Lin;
7:3:44:11     Anomalous magnetic properties of 7 nm single-crystal Co3O4 nanowires
DOI:10.1063/1.3674317  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Lv, Ping;Zhang, Yan;Xu, Rui;Nie, Jia-Cai;He, Lin;
7:3:44:12     Insight into oxygen stability and vacancy formation on Co3O4 model slabs
DOI:10.1016/j.commatsci.2013.02.001  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2013
  TC:5  AU: Shojaee, Kambiz;Montoya, Alejandro;Haynes, Brian S.;
7:3:44:13     Density Functional Theory Study of the Oxidation of Ammonia on the IrO2(110) Surface
DOI:10.1021/la203339z  JN:LANGMUIR  PY:2011
  TC:6  AU: Wang, Chia-Ching;Siao, Shih Syong;Jiang, Jyh-Chiang;
7:3:45:1     Prediction of thickness limits of ideal polar ultrathin films
DOI:10.1103/PhysRevB.85.121411  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Zhong, Zhicheng;Koster, G.;Kelly, Paul J.;
7:3:45:2     Effects of interfacial electron transfer on the magnetic structure of SrMnO3 in LaAlO3/SrMnO3 heterostructures
DOI:10.1016/j.commatsci.2013.09.004  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: Xu, Qinfang;Li, Chen;Wu, Di;Li, Aidong;
7:3:45:3     Interface reconstruction in superconducting CaCuO2/SrTiO3 superlattices: A hard x-ray photoelectron spectroscopy study
DOI:10.1103/PhysRevB.87.155145  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Aruta, C.;Schlueter, C.;Lee, T-L;Di Castro, D.;Innocenti, D.;Tebano, A.;Zegenhagen, J.;Balestrino, G.;
7:3:45:4     Electron-hole liquids in transition-metal oxide heterostructures
DOI:10.1103/PhysRevB.82.073101  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Millis, A. J.;Schlom, Darrell G.;
7:3:45:5     Occurrence of a high-temperature superconducting phase in (CaCuO2)(n)/(SrTiO3)(m) superlattices
DOI:10.1103/PhysRevB.86.134524  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Di Castro, D.;Salvato, M.;Tebano, A.;Innocenti, D.;Aruta, C.;Prellier, W.;Lebedev, O. I.;Ottaviani, I.;Brookes, N. B.;Minola, M.;Sala, M. Moretti;Mazzoli, C.;Medaglia, P. G.;Ghiringhelli, G.;Braicovich, L.;Cirillo, M.;Balestrino, G.;
7:3:45:6     Experimental Evidence for Oxygen Sublattice Control in Polar Infinite Layer SrCuO2
DOI:10.1103/PhysRevLett.111.096102  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Samal, D.;Tan, Haiyan;Molegraaf, H.;Kuiper, B.;Siemons, W.;Bals, Sara;Verbeeck, Jo;Van Tendeloo, Gustaaf;Takamura, Y.;Arenholz, Elke;Jenkins, Catherine A.;Rijnders, G.;Koster, Gertjan;
7:3:45:7     Control of oxygen sublattice structure in ultra-thin SrCuO2 films studied by X-ray photoelectron diffraction
DOI:10.1063/1.4824779  JN:APL MATERIALS  PY:2013
  TC:1  AU: Kuiper, Bouwe;Samal, D.;Blank, Dave H. A.;ten Elshof, Johan E.;Rijnders, Guus;Koster, Gertjan;
7:3:45:8     Evidence of electronic band redistribution in La0.65Sr0.35MnO3-delta by hard x-ray photoelectron spectroscopy
DOI:10.1103/PhysRevB.86.155102  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Schlueter, C.;Orgiani, P.;Lee, T. -L.;Petrov, A. Yu.;Galdi, A.;Davidson, B. A.;Zegenhagen, J.;Aruta, C.;
7:3:45:9     Raman spectroscopy study of the interface structure in (CaCuO2)n/(SrTiO3)m superlattices
DOI:10.1063/1.4828358  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Di Castro, D.;Caramazza, S.;Innocenti, D.;Balestrino, G.;Marini, C.;Dore, P.;Postorino, P.;
7:3:45:10     Charge localization at the interface between La1-xSrxMnO3 and the "infinite layers" cuprate CaCuO2
DOI:10.1063/1.4768680  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Yang, Nan;Di Castro, D.;Aruta, C.;Mazzoli, C.;Minola, M.;Brookes, N. B.;Sala, M. Moretti;Prellier, W.;Lebedev, O. I.;Tebano, A.;Balestrino, G.;
7:3:45:11     Optical response of oxygen deficient La0.7Sr0.3MnO3 thin films deposited by pulsed laser deposition
DOI:10.1016/j.tsf.2013.07.071  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Cesaria, M.;Caricato, A. P.;Leggieri, G.;Martino, M.;Maruccio, G.;
7:3:45:12     Growth and interfacial properties of epitaxial CaCuO2 thin films
DOI:10.1063/1.4767117  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Fuchs, D.;Mueller, P.;Sleem, A.;Schneider, R.;Gerthsen, D.;v. Loehneysen, H.;
7:3:45:13     Experimental Evidence for Oxygen Sublattice Control in Polar Infinite Layer SrCuO2 (vol 111, 096102, 2013)
DOI:10.1103/PhysRevLett.111.109902  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:0  AU: Samal, D.;Tan, Haiyan;Molegraaf, H.;Kuiper, B.;Siemons, W.;Bals, Sara;Verbeeck, Jo;Van Tendeloo, Gustaaf;Takamura, Y.;Arenholz, Elke;Jenkins, Catherine A.;Rijnders, G.;Koster, Gertjan;
7:3:46:1     Integration of Self-Assembled Epitaxial BiFeO3-CoFe2O4 Multiferroic Nanocomposites on Silicon Substrates
DOI:10.1002/adfm.201401458  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:2  AU: Kim, Dong Hun;Aimon, Nicolas M.;Sun, Xue Yin;Kornblum, Lior;Walker, Fred J.;Ahn, Charles H.;Ross, Caroline A.;
7:3:46:2     Magnetoelastic effects in SrTi1-xMxO3 (M = Fe, Co, or Cr) epitaxial thin films
DOI:10.1103/PhysRevB.84.014416  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Kim, Dong Hun;Bi, Lei;Jiang, Peng;Dionne, Gerald F.;Ross, C. A.;
7:3:46:3     Probing Individual Layers in Functional Oxide Multilayers by Wavelength-Dependent Raman Scattering
DOI:10.1002/adfm.201201272  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:10  AU: Kreisel, Jens;Weber, Mads C.;Dix, Nico;Sanchez, Florencio;Thomas, Pamela. A.;Fontcuberta, Josep;
7:3:46:4     Self-Assembled Single-Phase Perovskite Nanocomposite Thin Films
DOI:10.1021/nl903611t  JN:NANO LETTERS  PY:2010
  TC:19  AU: Kim, Hyun-Suk;Bi, Lei;Paik, Hanjong;Yang, Dae-Jin;Park, Yun Chang;Dionne, Gerald F.;Ross, Caroline A.;
7:3:46:5     Yttria-stabilized zirconia/SrTiO3 oxide heteroepitaxial interface with symmetry discontinuity
DOI:10.1063/1.4885089  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Scigaj, M.;Dix, N.;Cabero, M.;Rivera-Calzada, A.;Santamaria, J.;Fontcuberta, J.;Herranz, G.;Sanchez, F.;
7:3:46:6     Ferromagnetism in single crystal and nanocomposite Sr(Ti,Fe)O-3 epitaxial films
DOI:10.1039/c1jm11286d  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:9  AU: Kim, Hyun-Suk;Bi, Lei;Kim, Dong Hun;Yang, Dae-Jin;Choi, Yoon Jeong;Lee, Jung Woo;Kang, Jeung Ku;Park, Yun Chang;Dionne, Gerald F.;Ross, Caroline A.;
7:3:46:7     Flat epitaxial ferromagnetic CoFe2O4 films on buffered Si(001)
DOI:10.1016/j.tsf.2010.12.200  JN:THIN SOLID FILMS  PY:2011
  TC:7  AU: Bachelet, R.;de Coux, P.;Warot-Fonrose, B.;Skumryev, V.;Fontcuberta, J.;Sanchez, F.;
7:3:46:8     The role of deposition conditions on the structure and magnetic properties of SrTi1-xFexO3 films
DOI:10.1063/1.3673415  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Kim, Dong Hun;Aimon, Nicolas M.;Bi, Lei;Dionne, Gerald F.;Ross, C. A.;
7:3:46:9     Structure and magnetism of epitaxial SrTi0.78Cu0.22O3-delta films with mixed-valence Cu ions
DOI:10.1063/1.4821022  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Kim, Dong Hun;Dionne, Gerald F.;Ross, C. A.;
7:3:46:10     Generic model of superexchange effects in magnetoelastic oxides
DOI:10.1063/1.4798498  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Dionne, G. F.;Kim, D. H.;Bi, L.;Ross, C. A.;
7:3:47:1     Tailoring magnetic anisotropy in epitaxial half metallic La0.7Sr0.3MnO3 thin films
DOI:10.1063/1.3605542  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Perna, P.;Rodrigo, C.;Jimenez, E.;Teran, F. J.;Mikuszeit, N.;Mechin, L.;Camarero, J.;Miranda, R.;
7:3:47:2     Magnetic domain structure of La0.7Sr0.3MnO3 thin-films probed at variable temperature with scanning electron microscopy with polarization analysis
DOI:10.1063/1.4798538  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Reeve, Robert M.;Mix, Christian;Koenig, Markus;Foerster, Michael;Jakob, Gerhard;Klaeui, Mathias;
7:3:47:3     Direct experimental determination of the anisotropic magnetoresistive effects
DOI:10.1063/1.4878555  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Perna, P.;Maccariello, D.;Rodrigo, C.;Cunado, J. L. F.;Munoz, M.;Prieto, J. L.;Nino, M. A.;Bollero, A.;Camarero, J.;Miranda, R.;
7:3:47:4     Control of spin configuration in half-metallic La0.7Sr0.3MnO3 nano-structures
DOI:10.1063/1.3623480  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Rhensius, J.;Vaz, C. A. F.;Bisig, A.;Schweitzer, S.;Heidler, J.;Koerner, H. S.;Locatelli, A.;Nino, M. A.;Weigand, M.;Mechin, L.;Gaucher, F.;Goering, E.;Heyderman, L. J.;Klaeui, M.;
7:3:47:5     Magnetic anisotropy and magnetization reversal of La0.67Sr0.33MnO3 thin films on SrTiO3(110)
DOI:10.1063/1.3506407  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Boschker, Hans;Kautz, Jaap;Houwman, Evert P.;Koster, Gertjan;Blank, Dave H. A.;Rijnders, Guus;
7:3:47:6     Control of the magnetization in pre-patterned half-metallic La0.7Sr0.3MnO3 nanostructures
DOI:10.1063/1.4765672  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Heidler, J.;Rhensius, J.;Vaz, C. A. F.;Wohlhueter, P.;Koerner, H. S.;Bisig, A.;Schweitzer, S.;Farhan, A.;Mechin, L.;Le Guyader, L.;Nolting, F.;Locatelli, A.;Mentes, T. O.;Nino, M. A.;Kronast, F.;Heyderman, L. J.;Klaeui, M.;
7:3:47:7     Direct observation of magnetization reversal and low field magnetoresistance of epitaxial La0.7Sr0.3MnO3/SrTiO3 (001) thin films at room temperature
DOI:10.1063/1.4730966  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Fadil, D.;Wu, S.;Perna, P.;Renault, B.;Saib, M.;Lebargy, S.;Gasnier, J.;Guillet, B.;Routoure, J. -M.;Flament, S.;Mechin, L.;
7:3:47:8     Efficient spin transfer torque in La2/3Sr1/3MnO3 nanostructures
DOI:10.1063/1.4865415  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Foerster, Michael;Pena, Luis;Vaz, C. A. F.;Heinen, Jan;Finizio, Simone;Schulz, Tomek;Bisig, Andre;Buettner, Felix;Eisebitt, Stefan;Mechin, Laurence;Huehn, Sebastian;Moshnyaga, Vasily;Klaeui, Mathias;
7:3:47:9     Direct observation of temperature dependent magnetic domain structure of the multiferroic La0.66Sr0.34MnO3/BiFeO3 bilayer system by x-ray linear dichroism- and x-ray magnetic circular dichroism-photoemission electron microscopy
DOI:10.1063/1.4876300  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Mix, C.;Finizio, S.;Buzzi, M.;Kronast, F.;Nolting, F.;Jakob, G.;Klaeui, M.;
7:3:47:10     Magnetic anisotropy reversal by shear stress in (110)-orientated La2/3Ca1/3MnO3 films
DOI:10.1063/1.4891638  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Li, Y.;Sun, J. R.;Zhang, J.;Shen, B. G.;
7:3:47:11     Noise investigation of the orthogonal fluxgate employing alternating direct current bias
DOI:10.1063/1.3562979  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Weiss, Eyal;Paperno, Eugene;
7:3:47:12     Magnetization reversal in half metallic La0.7Sr0.3MnO3 films grown onto vicinal surfaces
DOI:10.1063/1.3560893  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Perna, P.;Rodrigo, C.;Jimenez, E.;Mikuszeit, N.;Teran, F. J.;Mechin, L.;Camarero, J.;Miranda, R.;
7:3:47:13     Tailoring magnetic anisotropy in epitaxial half metallic La0.7Sr0.3MnO3 thin films (vol 110, 013919, 2011)
DOI:10.1063/1.3656371  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Perna, P.;Rodrigo, C.;Jimenez, E.;Teran, F. J.;Mikuszeit, N.;Mechin, L.;Camarero, J.;Miranda, R.;
7:3:47:14     Magnetization reversal signatures in the magnetoresistance of magnetic multilayers
DOI:10.1103/PhysRevB.86.024421  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Perna, P.;Rodrigo, C.;Munoz, M.;Prieto, J. L.;Bollero, A.;Maccariello, D.;Cunado, J. L. F.;Romera, M.;Akerman, J.;Jimenez, E.;Mikuszeit, N.;Cros, V.;Camarero, J.;Miranda, R.;
7:3:47:15     Orthogonal fluxgate employing discontinuous excitation
DOI:10.1063/1.3360632  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Weiss, Eyal;Paperno, Eugene;Plotkin, Anton;
7:3:47:16     Theoretical analysis of the intrinsic magnetic noise spectral density of magnetostrictive-piezoelectric laminated composites
DOI:10.1063/1.3594714  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Zhuang, X.;Cordier, C.;Saez, S.;Sing, M. Lam Chok;Dolabdjian, C.;Gao, J.;Li, J. F.;Viehland, D.;
7:3:48:1     Vacant-Site Octahedral Tilings on SrTiO3 (001), the (root 13 x root 13)R33.7 degrees Surface, and Related Structures
DOI:10.1103/PhysRevLett.106.176102  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:18  AU: Kienzle, D. M.;Becerra-Toledo, A. E.;Marks, L. D.;
7:3:48:2     Atomic-Scale Visualization of Initial Growth of Homoepitaxial SrTiO3 Thin Film on an Atomically Ordered Substrate
DOI:10.1021/nn202477n  JN:ACS NANO  PY:2011
  TC:13  AU: Shimizu, Ryota;Iwaya, Katsuya;Ohsawa, Takeo;Shiraki, Susumu;Hasegawa, Tetsuya;Hashizume, Tomihiro;Hitosugi, Taro;
7:3:48:3     Effect of oxygen deficiency on SrTiO3(001) surface reconstructions
DOI:10.1063/1.4730409  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Shimizu, Ryota;Iwaya, Katsuya;Ohsawa, Takeo;Shiraki, Susumu;Hasegawa, Tetsuya;Hashizume, Tomihiro;Hitosugi, Taro;
7:3:48:4     Imaging the Evolution of d States at a Strontium Titanate Surface
DOI:10.1021/ja509231w  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2014
  TC:0  AU: Hamada, Ikutaro;Shimizu, Ryota;Ohsawa, Takeo;Iwaya, Katsuya;Hashizume, Tomihiro;Tsukada, Masaru;Akagi, Kazuto;Hitosugi, Taro;
7:3:48:5     Chemical imaging and angle-resolved photoemission study of well-ordered thermally reduced SrTiO3(100)
DOI:10.1103/PhysRevB.85.125115  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Frantzeskakis, Emmanouil;Avila, Jose;Asensio, Maria C.;
7:3:48:6     Stripe charge ordering in SrO-terminated SrTiO3(001) surfaces
DOI:10.1103/PhysRevB.83.125117  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Iwaya, Katsuya;Shimizu, Ryota;Ohsawa, Takeo;Hashizume, Tomihiro;Hitosugi, Taro;
7:3:48:7     Visualizing Atomistic Formation Process of SrOx Thin Films on SrTiO3
DOI:10.1021/nn405359u  JN:ACS NANO  PY:2014
  TC:5  AU: Ohsawa, Takeo;Shimizu, Ryota;Iwaya, Katsuya;Hitosugi, Taro;
7:3:48:8     Thickness-dependent local surface electronic structures of homoepitaxial SrTiO3 thin films
DOI:10.1063/1.3485826  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Ohsawa, T.;Iwaya, K.;Shimizu, R.;Hashizume, T.;Hitosugi, T.;
7:3:48:9     Nanoscale structural variation observed on the vicinal SrTiO3(001) surface
DOI:10.1063/1.3447796  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Shiraki, Susumu;Nantoh, Masashi;Katano, Satoshi;Kawai, Maki;
7:3:48:10     Selective growth of perovskite oxides on SrTiO3 (001) by control of surface reconstructions
DOI:10.1063/1.3583443  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Phark, Soo-hyon;Chang, Young Jun;Noh, Tae Won;
7:3:48:11     Solid phase epitaxy of EuTiO3 thin films on SrTiO3 (100) substrates with different oxygen contents
DOI:10.1016/j.jcrysgro.2012.12.117  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:0  AU: Shimamoto, K.;Hirose, Y.;Nakao, S.;Fukumura, T.;Hasegawa, T.;
7:3:48:12     Low-temperature solid phase epitaxy for integrating advanced source/drain metal-oxide-semiconductor structures
DOI:10.1063/1.3298354  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Gouye, A.;Berbezier, I.;Favre, L.;Amiard, G.;Aouassa, M.;Campidelli, Y.;Halimaoui, A.;
7:3:48:13     Surface reconstructions in molecular beam epitaxy of SrTiO3
DOI:10.1063/1.4901726  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kajdos, Adam P.;Stemmer, Susanne;
7:3:48:14     Insights into solid phase epitaxy of ultrahighly doped silicon
DOI:10.1063/1.3408556  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Gouye, A.;Berbezier, I.;Favre, L.;Aouassa, M.;Amiard, G.;Ronda, A.;Campidelli, Y.;Halimaoui, A.;
7:3:49:1     Topotactic Phase Transformation of the Brownmillerite SrCoO2.5 to the Perovskite SrCoO3-delta
DOI:10.1002/adma.201300531  JN:ADVANCED MATERIALS  PY:2013
  TC:17  AU: Jeen, H.;Choi, W. S.;Freeland, J. W.;Ohta, H.;Jung, C. U.;Lee, H. N.;
7:3:49:2     Preparation of SrCoOx thin films on LaAlO3 substrate and their reversible redox process at moderate temperatures
DOI:10.1016/j.jcrysgro.2015.06.010  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Hao, L.;Zhang, Z. F.;Xie, X. N.;Wang, H. R.;Yu, Q. X.;Zhu, H.;
7:3:49:3     Resistance switching in epitaxial SrCoOx thin films
DOI:10.1063/1.4893323  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Tambunan, Octolia T.;Parwanta, Kadek J.;Acharya, Susant K.;Lee, Bo Wha;Jung, Chang Uk;Kim, Yeon Soo;Park, Bae Ho;Jeong, Huiseong;Park, Ji-Yong;Cho, Myung Rae;Park, Yun Daniel;Choi, Woo Seok;Kim, Dong-Wook;Jin, Hyunwoo;Lee, Suyoun;Song, Seul Ji;Kang, Sung-Jin;Kim, Miyoung;Hwang, Cheol Seong;
7:3:49:4     Magnetic phase separation in SrCoOx (2.5 <= x <= 3)
DOI:10.1063/1.3622644  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Xie, C. K.;Nie, Y. F.;Wells, B. O.;Budnick, J. I.;Hines, W. A.;Dabrowski, B.;
7:3:49:5     O-K and Co-L XANES Study on Oxygen Intercalation in Perovskite SrCoO3-delta
DOI:10.1021/cm9021563  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:15  AU: Karvonen, Lassi;Valkeapaa, Markus;Liu, Ru-Shi;Chen, Jin-Ming;Yamauchi, Hisao;Karppinen, Maarit;
7:3:49:6     Reversal of the Lattice Structure in SrCoOx Epitaxial Thin Films Studied by Real-Time Optical Spectroscopy and First-Principles Calculations
DOI:10.1103/PhysRevLett.111.097401  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Choi, Woo Seok;Jeen, Hyoungjeen;Lee, Jun Hee;Seo, S. S. Ambrose;Cooper, Valentino R.;Rabe, Karin M.;Lee, Ho Nyung;
7:3:49:7     Growth control of the oxidation state in vanadium oxide thin films
DOI:10.1063/1.4903348  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Lee, Shinbuhm;Meyer, Tricia L.;Park, Sungkyun;Egami, Takeshi;Ho Nyung Lee;
7:3:49:8     Anion charge storage through oxygen intercalation in LaMnO3 perovskite pseudocapacitor electrodes
DOI:10.1038/NMAT4000  JN:NATURE MATERIALS  PY:2014
  TC:15  AU: Mefford, J. Tyler;Hardin, William G.;Dai, Sheng;Johnston, Keith P.;Stevenson, Keith J.;
7:3:49:9     Orienting Oxygen Vacancies for Fast Catalytic Reaction
DOI:10.1002/adma.201302919  JN:ADVANCED MATERIALS  PY:2013
  TC:8  AU: Jeen, Hyoungjeen;Bi, Zhonghe;Choi, Woo Seok;Chisholm, Matthew F.;Bridges, Craig A.;Paranthaman, M. Parans;Lee, Ho Nyung;
7:3:49:10     Suppression of magnetic phase separation in epitaxial SrCoOx films
DOI:10.1063/1.4801646  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Rueckert, F. J.;Nie, Y. F.;Abughayada, C.;Sabok-Sayr, S. A.;Mohottala, H. E.;Budnick, J. I.;Hines, W. A.;Dabrowski, B.;Wells, B. O.;
7:3:49:11     Reversible redox reactions in an epitaxially stabilized SrCoOx oxygen sponge
DOI:10.1038/NMAT3736  JN:NATURE MATERIALS  PY:2013
  TC:21  AU: Jeen, Hyoungjeen;Choi, Woo Seok;Biegalski, Michael D.;Folkman, Chad M.;Tung, I-Cheng;Fong, Dillon D.;Freeland, John W.;Shin, Dongwon;Ohta, Hiromichi;Chisholm, Matthew F.;Lee, Ho Nyung;
7:3:49:12     The n=3 member of the SrCoO(3n-1)/n series of layered oxygen-defect perovskites
DOI:10.1016/j.materresbull.2011.05.028  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:5  AU: Karvonen, Lassi;Yoon, Songhak;Hug, Paul;Yamauchi, Hisao;Weidenkaff, Anke;Karppinen, Maarit;
7:3:49:13     Unipolar resistive switching characteristics in Co3O4 films
DOI:10.1016/j.tsf.2010.07.075  JN:THIN SOLID FILMS  PY:2010
  TC:9  AU: Gao, Xu;Guo, Hongxuan;Xia, Yidong;Yin, Jiang;Liu, Zhiguo;
7:3:49:14     Loss of spin glass behavior in ultrathin AuFe films
DOI:10.1103/PhysRevB.81.132402  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Fritzsche, H.;van der Knaap, J. M.;Hesselberth, M. B. S.;Nieuwenhuys, G. J.;
7:3:50:1     Band alignment in visible-light photo-active CoO/SrTiO3 (001) heterostructures
DOI:10.1063/1.4905112  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Seo, Hosung;Demkov, Alexander A.;
7:3:50:2     Interface band profiles of Mott-insulator/Nb : SrTiO3 heterojunctions as investigated by optical spectroscopy
DOI:10.1103/PhysRevB.82.201101  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Nakamura, Masao;Sawa, Akihito;Fujioka, Jun;Kawasaki, Masashi;Tokura, Yoshinori;
7:3:50:3     Visualizing nanoscale electronic band alignment at the La2/3Ca1/3MnO3/ONb:SrTiO3 interface
DOI:10.1103/PhysRevB.82.041101  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Chien, TeYu;Liu, Jian;Chakhalian, Jacques;Guisinger, Nathan P.;Freeland, John W.;
7:3:50:4     Interface-dependent rectifying TbMnO3-based heterojunctions
DOI:10.1063/1.3660322  JN:AIP ADVANCES  PY:2011
  TC:11  AU: Cui, Yimin;Tian, Yufeng;Liu, Wei;Li, Yongfeng;Wang, Rongming;Wu, Tom;
7:3:50:5     Thermally assisted tunneling transport in La0.7Ca0.3MnO3/SrTiO3:Nb Schottky-like heterojunctions
DOI:10.1103/PhysRevB.85.245122  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Cuellar, F. A.;Sanchez-Santolino, G.;Varela, M.;Clement, M.;Iborra, E.;Sefrioui, Z.;Santamaria, J.;Leon, C.;
7:3:50:6     Magnon spectrum of transition-metal oxides: Calculations including long-range magnetic interactions using the LSDA+U method
DOI:10.1103/PhysRevB.84.174425  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Essenberger, F.;Sharma, S.;Dewhurst, J. K.;Bersier, C.;Cricchio, F.;Nordstrom, L.;Gross, E. K. U.;
7:3:50:7     Exchange parameters and adiabatic magnon energies from spin-spiral calculations
DOI:10.1103/PhysRevB.88.134427  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Jacobsson, Adam;Sanyal, Biplab;Lezaic, Marjana;Bluegel, Stefan;
7:3:50:8     Comment on "Controllable local modification of fractured Nb-doped SrTiO3 surfaces" [Appl. Phys. Lett. 95, 163107 (2009)]
DOI:10.1063/1.3601470  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Chen, Y. L.;Xiong, C. M.;Nie, J. C.;
7:3:50:9     Response to "Comment on 'Controllable local modification of fractured Nb-doped SrTiO3 surfaces'" [Appl. Phys. Lett. 98, 256102 (2011)]
DOI:10.1063/1.3601471  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Chien, TeYu;Santos, Tiffany S.;Bode, Matthias;Guisinger, Nathan P.;Freeland, John W.;
7:3:50:10     Photocarrier collection from depletion layer of LaMnO3
DOI:10.1063/1.3677790  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Fujioka, J.;Nakamura, M.;Kawasaki, M.;Tokura, Y.;
7:3:50:11     Carrier multiplication and separation in systems with strong electron interaction: Photoinduced dynamics of a junction solar cell
DOI:10.1103/PhysRevB.87.165126  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Koshibae, W.;Furukawa, N.;Nagaosa, N.;
7:3:50:12     Effect of temperature on the La1-xCaxMnO3/SrTiO3:Nb (x=0-0.75) heterojunctions
DOI:10.1063/1.3462322  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:1  AU: Lu, X. Y.;Sun, J. R.;Wei, A. D.;Gao, W. W.;Shang, D. S.;Wang, J.;Wang, Z. H.;Shen, B. G.;
7:3:50:13     Heterojunction of multiferroic HoMnO3 on Nb-doped SrTiO3
DOI:10.1063/1.4795218  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Han, T. C.;Chen, C. T.;Pan, S. S.;Lin, J. G.;
7:3:50:14     Dielectric characteristics of Ga doped TbMnO3
DOI:10.1016/j.mseb.2012.11.025  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:0  AU: Xu, Jianxun;Cui, Yimin;
7:3:51:1     Oxide Heterostructures for Efficient Solar Cells
DOI:10.1103/PhysRevLett.110.078701  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:15  AU: Assmann, Elias;Blaha, Peter;Laskowski, Robert;Held, Karsten;Okamoto, Satoshi;Sangiovanni, Giorgio;
7:3:51:2     First-principles modeling of Pt/LaAlO3/SrTiO3 capacitors under an external bias potential
DOI:10.1103/PhysRevB.85.075426  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Cazorla, Claudio;Stengel, Massimiliano;
7:3:51:3     Epitaxial growth and transport properties of BaTiO3/LaAlO3/SrTiO3 heterostructures
DOI:10.1016/j.ceramint.2014.05.084  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Gao, Haobin;Peng, Wei;Zhu, Xiaohong;Hu, Tao;Xie, Xiaoming;Zhu, Jiliang;
7:3:51:4     Enhanced Electrical Transparency by Ultrathin LaAlO3 Insertion at Oxide Metal/Semiconductor Heterointerfaces
DOI:10.1021/nl504169m  JN:NANO LETTERS  PY:2015
  TC:0  AU: Yajima, Takeaki;Minohara, Makoto;Bell, Christopher;Kumigashira, Hiroshi;Oshima, Masaharu;Hwang, Harold Y.;Hikita, Yasuyuki;
7:3:51:5     Diodes with breakdown voltages enhanced by the metal-insulator transition of LaAlO3-SrTiO3 interfaces
DOI:10.1063/1.3428433  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Jany, R.;Breitschaft, M.;Hammerl, G.;Horsche, A.;Richter, C.;Paetel, S.;Mannhart, J.;Stucki, N.;Reyren, N.;Gariglio, S.;Zubko, P.;Caviglia, A. D.;Triscone, J. -M.;
7:3:51:6     Metal-insulator transition at a depleted LaAlO3/SrTiO3 interface: Evidence for charge transfer induced by SrTiO3 phase transitions
DOI:10.1063/1.3656703  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Lue, W. M.;Wang, X.;Liu, Z. Q.;Dhar, S.;Annadi, A.;Gopinadhan, K.;Barman, A. Roy;Su, H. B.;Venkatesan, T.;Ariando;
7:3:51:7     Low frequency noise in La0.7Sr0.3MnO3 based magnetic tunnel junctions
DOI:10.1063/1.3698393  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Guerrero, R.;Solignac, A.;Fermon, C.;Pannetier-Lecoeur, M.;Lecoeur, Ph.;Fernandez-Pacheco, R.;
7:3:51:8     Thermally excited multiband conduction in LaAlO3/SrTiO3 heterostructures exhibiting magnetic scattering
DOI:10.1103/PhysRevB.88.241301  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:3:52:1     Variational pseudo-self-interaction-corrected density functional approach to the ab initio description of correlated solids and molecules
DOI:10.1103/PhysRevB.84.195127  JN:PHYSICAL REVIEW B  PY:2011
  TC:26  AU: Filippetti, A.;Pemmaraju, C. D.;Sanvito, S.;Delugas, P.;Puggioni, D.;Fiorentini, Vincenzo;
7:3:52:2     Exchange interactions and magnetic phases of transition metal oxides: Benchmarking advanced ab initio methods
DOI:10.1103/PhysRevB.84.115114  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Archer, T.;Pemmaraju, C. D.;Sanvito, S.;Franchini, C.;He, J.;Filippetti, A.;Delugas, P.;Puggioni, D.;Fiorentini, V.;Tiwari, R.;Majumdar, P.;
7:3:52:3     Exceptionally large room-temperature ferroelectric polarization in the PbNiO3 multiferroic nickelate: First-principles study
DOI:10.1103/PhysRevB.86.014116  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Hao, X. F.;Stroppa, A.;Picozzi, S.;Filippetti, A.;Franchini, C.;
7:3:52:4     Multigap absorption in CaCu3Ti4O12 and the prediction capability of ab initio methods
DOI:10.1103/PhysRevB.90.045132  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ricci, Francesco;Alippi, Paola;Filippetti, Alessio;Fiorentini, Vincenzo;
7:3:52:5     Designing asymmetric multiferroics with strong magnetoelectric coupling
DOI:10.1103/PhysRevB.90.104409  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Lu, X. Z.;Xiang, H. J.;
7:3:52:6     Many-body quasiparticle spectrum of Co-doped ZnO: A GW perspective
DOI:10.1103/PhysRevB.87.245118  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Sarsari, I. Abdolhosseini;Pemmaraju, C. D.;Salamati, Hadi;Sanvito, S.;
7:3:52:7     First-principles calculation of electronic and structural properties of YBa2Cu3O6+y
DOI:10.1103/PhysRevB.82.195122  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Lopez, Giorgia M.;Filippetti, Alessio;Mantega, Mauro;Fiorentini, Vincenzo;
7:3:52:8     Forces and atomic relaxation in density functional theory with the pseudopotential self-interaction correction
DOI:10.1103/PhysRevB.84.245129  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Wierzbowska, Malgorzata;Majewski, Jacek A.;
7:3:52:9     Origin of polar distortion in LiNbO3-type "ferroelectric" metals: Role of A-site instability and short-range interactions
DOI:10.1103/PhysRevB.90.094108  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Xiang, H. J.;
7:3:53:1     Electrostatic Control of the Evolution from a Superconducting Phase to an Insulating Phase in Ultrathin YBa2CaCu3O7-x Films
DOI:10.1103/PhysRevLett.107.027001  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:36  AU: Leng, Xiang;Garcia-Barriocanal, Javier;Bose, Shameek;Lee, Yeonbae;Goldman, A. M.;
7:3:53:2     Electronically driven superconductor-insulator transition in electrostatically doped La2CuO4+delta thin films
DOI:10.1103/PhysRevB.87.024509  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Garcia-Barriocanal, J.;Kobrinskii, A.;Leng, X.;Kinney, J.;Yang, B.;Snyder, S.;Goldman, A. M.;
7:3:53:3     Effective thickness of two-dimensional superconductivity in a tunable triangular quantum well of SrTiO3
DOI:10.1103/PhysRevB.89.020508  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ueno, K.;Nojima, T.;Yonezawa, S.;Kawasaki, M.;Iwasa, Y.;Maeno, Y.;
7:3:53:4     Superconductor-Insulator Quantum Phase Transition in Disordered FeSe Thin Films
DOI:10.1103/PhysRevLett.108.257003  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:8  AU: Schneider, R.;Zaitsev, A. G.;Fuchs, D.;von Loehneysen, H.;
7:3:53:5     Indications of an Electronic Phase Transition in Two-Dimensional Superconducting YBa2Cu3O7-x Thin Films Induced by Electrostatic Doping
DOI:10.1103/PhysRevLett.108.067004  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:10  AU: Leng, Xiang;Garcia-Barriocanal, Javier;Yang, Boyi;Lee, Yeonbae;Kinney, J.;Goldman, A. M.;
7:3:53:6     Electrostatic Tuning of the Proximity-Induced Exchange Field in EuS/Al Bilayers
DOI:10.1103/PhysRevLett.111.027207  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:1  AU: Liu, T. J.;Prestigiacomo, J. C.;Adams, P. W.;
7:3:53:7     Multiple-gap structure in electric-field-induced surface superconductivity
DOI:10.1103/PhysRevB.87.014505  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Mizohata, Yousuke;Ichioka, Masanori;Machida, Kazushige;
7:3:53:8     Disorder-controlled superconductivity at YBa2Cu3O7/SrTiO3 interfaces
DOI:10.1103/PhysRevB.87.245105  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Garcia-Barriocanal, J.;Perez-Munoz, A. M.;Sefrioui, Z.;Arias, D.;Varela, M.;Leon, C.;Pennycook, S. J.;Santamaria, J.;
7:3:53:9     Hole reduction and electron accumulation in YBa2Cu3Oy thin films using an electrochemical technique: Evidence for an n-type metallic state
DOI:10.1103/PhysRevB.84.020502  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Nojima, T.;Tada, H.;Nakamura, S.;Kobayashi, N.;Shimotani, H.;Iwasa, Y.;
7:3:53:10     Metallic state in La-doped YBa2Cu3Oy thin films with n-type charge carriers
DOI:10.1103/PhysRevB.86.045124  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Zeng, S. W.;Wang, X.;Lu, W. M.;Huang, Z.;Motapothula, M.;Liu, Z. Q.;Zhao, Y. L.;Annadi, A.;Dhar, S.;Mao, H.;Chen, W.;Venkatesan, T.;Ariando;
7:3:53:11     Electrostatic Control of the Evolution from a Superconducting Phase to an Insulating Phase in Ultrathin YBa2Cu3O7-x Films (vol 107, 027001, 2011)
DOI:10.1103/PhysRevLett.107.039901  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:0  AU: Leng, Xiang;Garcia-Barriocanal, Javier;Bose, Shameek;Lee, Yeonbae;Goldman, A. M.;
7:3:54:1     Coexistence of two-dimensional and three-dimensional Shubnikov-de Haas oscillations in Ar+-irradiated KTaO3
DOI:10.1103/PhysRevB.88.085102  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Harashima, S.;Bell, C.;Kim, M.;Yajima, T.;Hikita, Y.;Hwang, H. Y.;
7:3:54:2     Anisotropic magnetotransport in SrTiO3 surface electron gases generated by Ar+ irradiation
DOI:10.1103/PhysRevB.83.245120  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Bruno, F. Y.;Tornos, J.;Gutierrez del Olmo, M.;Sanchez Santolino, G.;Nemes, N. M.;Garcia-Hernandez, M.;Mendez, B.;Piqueras, J.;Antorrena, G.;Morellon, L.;De Teresa, J. M.;Clement, M.;Iborra, E.;Leon, C.;Santamaria, J.;
7:3:54:3     Electric field tuned crossover from classical to weakly localized quantum transport in electron doped SrTiO3
DOI:10.1103/PhysRevB.81.241307  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Ngai, J. H.;Segal, Y.;Su, D.;Zhu, Y.;Walker, F. J.;Ismail-Beigi, S.;Le Hur, K.;Ahn, C. H.;
7:3:54:4     Insulator-to-metal transition of SrTiO3:Nb single crystal surfaces induced by Ar+ bombardment
DOI:10.1063/1.4795611  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Rodenbuecher, C.;Wicklein, S.;Waser, R.;Szot, K.;
7:3:54:5     In situ study of emerging metallicity on ion-bombarded SrTiO3 surface
DOI:10.1063/1.3650254  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Gross, Heiko;Bansal, Namrata;Kim, Yong-Seung;Oh, Seongshik;
7:3:54:6     Electrostatic modulation of anisotropic magnetotransport in Ar+-irradiated SrTiO3: Effects of boundary scattering
DOI:10.1103/PhysRevB.83.045304  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Ngai, J. H.;Segal, Y.;Walker, F. J.;Ahn, C. H.;
7:3:54:7     Vacancy defect and carrier distributions in the high mobility electron gas formed at ion-irradiated SrTiO3 surfaces
DOI:10.1063/1.3369438  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Herranz, G.;Copie, O.;Gentils, A.;Tafra, E.;Basletic, M.;Fortuna, F.;Bouzehouane, K.;Fusil, S.;Jacquet, E.;Carretero, C.;Bibes, M.;Hamzic, A.;Barthelemy, A.;
7:3:54:8     Unusual low-frequency noise in irradiated SrTiO3
DOI:10.1103/PhysRevB.82.035102  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Guerrero, R.;Solignac, A.;Pannetier-Lecoeur, M.;Apertet, Y.;Lecoeur, P.;Fermon, C.;
7:3:54:9     Inhomogeneity of donor doping in SrTiO3 substrates studied by fluorescence-lifetime imaging microscopy
DOI:10.1063/1.4825367  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Rodenbuecher, C.;Gensch, T.;Speier, W.;Breuer, U.;Pilch, M.;Hardtdegen, H.;Mikulics, M.;Zych, E.;Waser, R.;Szot, K.;
7:3:54:10     In-Gap States in Wide-Band-Gap SrTiO3 Analyzed by Cathodoluminescence
DOI:10.1111/j.1551-2916.2010.04324.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Yang, Kai-Hsun;Chen, Ting-Yu;Ho, New-Jin;Lu, Hong-Yang;
7:3:55:1     Evolution of magnetic bubble domains in manganite films
DOI:10.1063/1.3615708  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:18  AU: Bakaul, S. R.;Lin, W.;Wu, T.;
7:3:55:2     Domain-related origin of magnetic relaxation in compressively strained manganite thin films
DOI:10.1063/1.4733320  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Bakaul, S. R.;Miao, B. F.;Lin, W.;Hu, W.;David, A.;Ding, H. F.;Wu, T.;
7:3:55:3     Engineering magnetic domains in manganite thin films by laser interference
DOI:10.1063/1.3673870  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Bakaul, S. R.;Lin, W.;Wu, T.;
7:3:55:4     Angular dependence of the Hall effect of La0.8Sr0.2MnO3 films
DOI:10.1103/PhysRevB.86.184402  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Naftalis, Netanel;Haham, Noam;Hoffman, Jason;Marshall, Matthew S. J.;Ahn, C. H.;Klein, Lior;
7:3:55:5     Suppression of photoconductivity by magnetic field in epitaxial manganite thin films
DOI:10.1063/1.3683551  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Guo, E. J.;Wang, L.;Lu, H. B.;Guo, H. Z.;He, M.;Jin, K. J.;Yang, G. Z.;Gao, J.;
7:3:55:6     Multiple-charge modulations in the ferromagnetic insulating state of lightly doped La1-xSrxMnO3
DOI:10.1103/PhysRevB.83.174401  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Asaka, T.;Mori, S.;Horibe, Y.;Takenaka, K.;Yu, X. Z.;Nagai, T.;Kimoto, K.;Hirayama, T.;Matsui, Y.;
7:3:55:7     Formation of nanoscale magnetic bubbles in ferromagnetic insulating manganite La7/8Sr1/8MnO3
DOI:10.1063/1.4760266  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Nagai, T.;Nagao, M.;Kurashima, K.;Asaka, T.;Zhang, W.;Kimoto, K.;
7:3:55:8     Ferromagnetic bubble clusters in Y0.67Ca0.33MnO3 thin films
DOI:10.1063/1.4806967  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Kim, Jeehoon;Haberkorn, N.;Kim, Suenne;Civale, L.;Dowden, P. C.;Movshovich, R.;
7:3:55:9     Enhanced ferromagnetism and glassy state in phase separated La0.95Sr0.05MnO3+delta
DOI:10.1063/1.4763460  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: De, K.;Das, S.;Roy, A.;Dhak, P.;Willinger, M.;Amaral, J. S.;Amaral, V. S.;Giri, S.;Majumder, S.;Silva, C. J. R.;Gomes, M. J. M.;Mahapatra, P. K.;
7:3:55:10     Hall effect measurements on strained and unstrained thin films of La0.7Ca0.3MnO3 and La0.7Sr0.3MnO3
DOI:10.1103/PhysRevB.85.205103  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Dildar, I. Mubeen;Beekman, C.;He, Xin;Aarts, J.;
7:3:55:11     Intrinsic domain-wall resistivity in half-metallic manganite thin films
DOI:10.1103/PhysRevB.86.184404  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Bakaul, S. R.;Hu, W.;Wu, T.;Kimura, T.;
7:3:55:12     Self-organized structures of orbital-ordered domains in Nd1-xSr1+xMnO4
DOI:10.1103/PhysRevB.81.060407  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Nagai, T.;Kimura, T.;Asaka, T.;Kimoto, K.;Takeguchi, M.;Matsui, Y.;
7:3:55:13     Direct observation of magnetic phase coexistence and magnetization reversal in a Gd0.67Ca0.33MnO3 thin film
DOI:10.1063/1.3676045  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Kim, Jeehoon;Haberkorn, N.;Civale, Leonardo;Nazaretski, Evgeny;Dowden, Paul;Saxena, Avadh;Thompson, J. D.;Movshovich, Roman;
7:3:56:1     Exchange bias induced by the Fe3O4 Verwey transition
DOI:10.1103/PhysRevB.85.134447  JN:PHYSICAL REVIEW B  PY:2012
  TC:13  AU: de la Venta, J.;Erekhinsky, M.;Wang, Siming;West, K. G.;Morales, R.;Schuller, Ivan K.;
7:3:56:2     Controlling the coexisting vertical magnetization shift and exchange bias in La0.3Sr0.7FeO3/SrRuO3 bilayers
DOI:10.1063/1.4867352  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Rana, Rakesh;Pandey, Parul;Rana, D. S.;
7:3:56:3     Spin-orbit coupling induced Mott transition in Ca2-xSrxRuO4 (0 <= x <= 0.2)
DOI:10.1103/PhysRevB.84.235136  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Liu, Guo-Qiang;
7:3:56:4     Giant vertical magnetization shift induced by spin canting in a Co/Ca2Ru0.98Fe0.02FeO4 heterostructure
DOI:10.1103/PhysRevB.88.024413  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Yuan, S. J.;Li, L.;Qi, T. F.;DeLong, L. E.;Cao, G.;
7:3:56:5     Increased metal-insulator transition temperatures in epitaxial thin films of V2O3 prepared in reduced oxygen environments
DOI:10.1063/1.3574910  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Brockman, J.;Aetukuri, N. P.;Topuria, T.;Samant, M. G.;Roche, K. P.;Parkin, S. S. P.;
7:3:56:6     Spin valve effect across the metal-insulator transition in V2O3
DOI:10.1063/1.4824294  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Erekhinsky, Mikhail;de la Venta, J.;Schuller, Ivan K.;
7:3:56:7     Negative Volume Thermal Expansion Via Orbital and Magnetic Orders in Ca2Ru1-xCrxO4(0 < x < 0.13)
DOI:10.1103/PhysRevLett.105.177203  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:8  AU: Qi, T. F.;Korneta, O. B.;Parkin, S.;De Long, L. E.;Schlottmann, P.;Cao, G.;
7:3:56:8     Competition between spin-orbit coupling and magnetic exchange splitting in Ca2RuO4
DOI:10.1103/PhysRevB.88.104428  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Liu, Guo-Qiang;
7:3:56:9     Magnetic and orbital orders coupled to negative thermal expansion in Mott insulators Ca(2)Ru1-xMxO(4) (M = Mn and Fe)
DOI:10.1103/PhysRevB.85.165143  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Qi, T. F.;Korneta, O. B.;Parkin, S.;Hu, Jiangping;Cao, G.;
7:3:56:10     Structural and dielectric properties of (001) and (111)-oriented BaZr0.2Ti0.8O3 epitaxial thin films
DOI:10.1016/j.tsf.2009.12.061  JN:THIN SOLID FILMS  PY:2010
  TC:4  AU: Ventura, J.;Fina, I.;Ferrater, C.;Langenberg, E.;Coy, L. E.;Polo, M. C.;Garcia-Cuenca, M. V.;Fabrega, L.;Varela, M.;
7:3:56:11     Modification of electrical and surface properties of V2O3 multilayer films on resin-impregnated highly oriented pyrolytic graphite composite substrates by shrinkage stress relaxation with chemical additives
DOI:10.1016/j.tsf.2013.09.005  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Jung, Hye-Mi;Um, Sukkee;
7:3:56:12     Exchange bias induced by the Fe3O4 Verwey transition (vol 85, 134447, 2012)
DOI:10.1103/PhysRevB.86.139902  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: de la Venta, J.;Erekhinsky, M.;Wang, Siming;West, K. G.;Morales, R.;Schuller, Ivan K.;
7:3:57:1     The cubic to tetragonal phase transition in SrTiO3 single crystals near its surface under internal and external strains
DOI:10.1063/1.3324695  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Loetzsch, R.;Luebcke, A.;Uschmann, I.;Foerster, E.;Grosse, V.;Thuerk, M.;Koettig, T.;Schmidl, F.;Seidel, P.;
7:3:57:2     Large out-of-plane ferroelectric polarization in flat epitaxial BaTiO3 on CoFe2O4 heterostructures
DOI:10.1063/1.4803943  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Dix, N.;Fina, I.;Bachelet, R.;Fabrega, L.;Kanamadi, C.;Fontcuberta, J.;Sanchez, F.;
7:3:57:3     Nonferroelectric contributions to the hysteresis cycles in manganite thin films: A comparative study of measurement techniques
DOI:10.1063/1.3555098  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Fina, I.;Fabrega, L.;Langenberg, E.;Marti, X.;Sanchez, F.;Varela, M.;Fontcuberta, J.;
7:3:57:4     Dielectric properties of (Bi0.9La0.1)(2)NiMnO6 thin films: Determining the intrinsic electric and magnetoelectric response
DOI:10.1103/PhysRevB.86.085108  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Langenberg, E.;Fina, I.;Ventura, J.;Noheda, B.;Varela, M.;Fontcuberta, J.;
7:3:57:5     Optical probe of ferroelectric order in bulk and thin-film perovskite titanates
DOI:10.1103/PhysRevB.88.104110  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Roessle, M.;Wang, C. N.;Marsik, P.;Yazdi-Rizi, M.;Kim, K. W.;Dubroka, A.;Marozau, I.;Schneider, C. W.;Humlicek, J.;Baeriswyl, D.;Bernhard, C.;
7:3:57:6     Ferroelectric phase transition in strained multiferroic (Bi0.9La0.1)(2)NiMnO6 thin films
DOI:10.1063/1.3675869  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Langenberg, E.;Fina, I.;Gemeiner, P.;Dkhil, B.;Fabrega, L.;Varela, M.;Fontcuberta, J.;
7:3:57:7     Long-range order of Ni2+ and Mn4+ and ferromagnetism in multiferroic (Bi0.9La0.1)(2)NiMnO6 thin films
DOI:10.1063/1.3524278  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Langenberg, E.;Rebled, J.;Estrade, S.;Daumont, C. J. M.;Ventura, J.;Coy, L. E.;Polo, M. C.;Garcia-Cuenca, M. V.;Ferrater, C.;Noheda, B.;Peiro, F.;Varela, M.;Fontcuberta, J.;
7:3:57:8     First-principles study of the growth thermodynamics of Pt on SrTiO3 (001)
DOI:10.1116/1.4732461  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2012
  TC:1  AU: Seo, Hosung;Posadas, Agham B.;Demkov, Alexander A.;
7:3:57:9     Spatially resolved twin domain distribution and lattice parameter variations in the near-surface region of SrTiO3 single crystals
DOI:10.1007/s00339-011-6674-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:1  AU: Loetzsch, Robert;Uschmann, Ingo;Foerster, Eckhard;
7:3:58:1     Field-dependent anisotropic magnetoresistance and planar Hall effect in epitaxial magnetite thin films
DOI:10.1103/PhysRevB.84.094441  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Naftalis, N.;Kaplan, A.;Schultz, M.;Vaz, C. A. F.;Moyer, J. A.;Ahn, C. H.;Klein, L.;
7:3:58:2     Out of plane anisotropic magnetoresistance and planar Hall effect in epitaxial film of La0.8Sr0.2MnO3
DOI:10.1063/1.4863854  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Naftalis, Netanel;Haham, Noam;Hoffman, Jason;Marshall, Matthew S. J.;Ahn, C. H.;Klein, L.;
7:3:58:3     Fourfold symmetric anisotropic magnetoresistance based on magnetocrystalline anisotropy and antiphase boundaries in reactive sputtered epitaxial Fe3O4 films
DOI:10.1063/1.3334722  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Li, P.;Jiang, E. Y.;Bai, H. L.;
7:3:58:4     Origin of the twofold and fourfold symmetric anisotropic magnetoresistance in epitaxial Fe3O4 films
DOI:10.1063/1.3499696  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:14  AU: Li, P.;Jin, C.;Jiang, E. Y.;Bai, H. L.;
7:3:58:5     Giant planar Hall effect in reactive sputtered epitaxial CrxFe3-xO4 films
DOI:10.1063/1.4894697  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Li, P.;Cui, W. Y.;Jin, C.;Bai, H. L.;
7:3:58:6     Anisotropic spin-orbit interaction revealed by in-plane magnetoresistance in single-oriented SrRuO3 thin films
DOI:10.1103/PhysRevB.85.235409  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Gunnarsson, R.;
7:3:58:7     Response to "Comment on 'Fourfold symmetric anisotropic magnetoresistance based on magnetocrystalline anisotropy and antiphase boundaries in reactive sputtered epitaxial Fe3O4 films' " [Appl. Phys. Lett. 98, 146101 (2010)]
DOI:10.1063/1.3575516  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Li, P.;Jiang, E. Y.;Bai, H. L.;
7:3:58:8     Low-temperature anisotropic magnetoresistance and planar Hall effect in SrRuO3
DOI:10.1103/PhysRevB.87.144407  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Haham, Noam;Shperber, Yishai;Reiner, James W.;Klein, Lior;
7:3:58:9     Thickness dependence of the resistivity tensor in epitaxial magnetite thin films
DOI:10.1063/1.4816399  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Naftalis, N.;Shperber, Y.;Moyer, J. A.;Ahn, C. H.;Klein, L.;
7:3:58:10     Three-dimensional mapping of the anisotropic magnetoresistance in Fe3O4 single crystal thin films
DOI:10.1063/1.4796178  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Ding, Z.;Li, J. X.;Zhu, J.;Ma, T. P.;Won, C.;Wu, Y. Z.;
7:3:58:11     Anisotropic magnetoresistance in epitaxial La-0.67(Ca1-xSrx)(0.33)MnO3 films
DOI:10.1063/1.4798798  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Liu, Yiwei;Yang, Zhihuan;Yang, Huali;Xie, Yali;Katlakunta, Sadhana;Chen, Bin;Zhan, Qingfeng;Li, Run-Wei;
7:3:58:12     Field-controllable exchange bias in epitaxial Fe films grown on GaAs
DOI:10.1063/1.4754622  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Choi, Seonghoon;Yoo, Taehee;Khym, S.;Lee, Sanghoon;Liu, X.;Furdyna, J. K.;
7:3:58:13     Comment on "Fourfold symmetric anisotropic magnetoresistance based on magnetocrystalline anisotropy and antiphase boundaries in reactive sputtered epitaxial Fe3O4 films" [Appl. Phys. Lett. 96, 092502 (2010)]
DOI:10.1063/1.3575515  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Ziese, M.;
7:3:59:1     Band offsets of CuInSe2/CdS and CuInSe2/ZnS (110) interfaces: A hybrid density functional theory study
DOI:10.1103/PhysRevB.88.035305  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;
7:3:59:2     First-principles study of valence band offsets at ZnSnP2/CdS, ZnSnP2/ZnS, and related chalcopyrite/zincblende heterointerfaces
DOI:10.1063/1.4816784  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Hinuma, Yoyo;Oba, Fumiyasu;Nose, Yoshitaro;Tanaka, Isao;
7:3:59:3     Functional Complex Point-Defect Structure in a Huge-Size-Mismatch System
DOI:10.1103/PhysRevLett.110.065504  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:10  AU: Ishikawa, Ryo;Shibata, Naoya;Oba, Fumiyasu;Taniguchi, Takashi;Findlay, Scott D.;Tanaka, Isao;Ikuhara, Yuichi;
7:3:59:4     Ionization potentials of (112) and (11(2)over-bar) facet surfaces of CuInSe2 and CuGaSe2
DOI:10.1103/PhysRevB.86.245433  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;
7:3:59:5     Origin of the failed ensemble average rule for the band gaps of disordered nonisovalent semiconductor alloys
DOI:10.1103/PhysRevB.90.115201  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ma, Jie;Deng, Hui-Xiong;Luo, Jun-Wei;Wei, Su-Huai;
7:3:59:6     Absolute deformation potentials and robust ab initio model for band shifts induced by (001) biaxial strain in group IIIA-VA semiconductors
DOI:10.1063/1.3537815  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Kadantsev, Eugene S.;Hawrylak, Pawel;
7:3:59:7     Valence band offsets at zinc-blende heterointerfaces with misfit dislocations: A first-principles study
DOI:10.1103/PhysRevB.88.075319  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Hinuma, Yoyo;Oba, Fumiyasu;Tanaka, Isao;
7:3:59:8     Band gap of sphalerite and chalcopyrite phases of epitaxial ZnSnP2
DOI:10.1063/1.3442917  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: St-Jean, P.;Seryogin, G. A.;Francoeur, S.;
7:3:59:9     Local environment of silicon in cubic boron nitride
DOI:10.1063/1.4849015  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Murata, Hidenobu;Taniguchi, Takashi;Hishita, Shunichi;Yamamoto, Tomoyuki;Oba, Fumiyasu;Tanaka, Isao;
7:3:60:1     Experimental evidence of ferroelectric negative capacitance in nanoscale heterostructures
DOI:10.1063/1.3634072  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:27  AU: Khan, Asif Islam;Bhowmik, Debanjan;Yu, Pu;Kim, Sung Joo;Pan, Xiaoqing;Ramesh, Ramamoorthy;Salahuddin, Sayeef;
7:3:60:2     Room-Temperature Negative Capacitance in a Ferroelectric Dielectric Super lattice Heterostructure
DOI:10.1021/n1502691u  JN:NANO LETTERS  PY:2014
  TC:5  AU: Gao, Weiwei;Khan, Asif;Marti, Xavi;Nelson, Chris;Serrao, Claudy;Ravichandran, Jayakanth;Ramesh, Ramamoorthy;Salahuddin, Sayeef;
7:3:60:3     Experimental Observation of Negative Capacitance in Ferroelectrics at Room Temperature
DOI:10.1021/nl5017255  JN:NANO LETTERS  PY:2014
  TC:12  AU: Appleby, Daniel J. R.;Ponon, Nikhil K.;Kwa, Kelvin S. K.;Zou, Bin;Petrov, Peter K.;Wang, Tianle;Alford, Neil M.;O'Neill, Anthony;
7:3:60:4     Experimental confirmation of temperature dependent negative capacitance in ferroelectric field effect transistor
DOI:10.1063/1.4704179  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Salvatore, Giovanni A.;Rusu, Alexandru;Ionescu, Adrian M.;
7:3:60:5     Temperature effect on electrical characteristics of negative capacitance ferroelectric field-effect transistors
DOI:10.1063/1.3688046  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Xiao, Y. G.;Tang, M. H.;Li, J. C.;Cheng, C. P.;Jiang, B.;Cai, H. Q.;Tang, Z. H.;Lv, X. S.;Gu, X. C.;
7:3:60:6     Effective Nanometer Airgap of NEMS Devices Using Negative Capacitance of Ferroelectric Materials
DOI:10.1021/nl5004416  JN:NANO LETTERS  PY:2014
  TC:6  AU: Masuduzzaman, Muhammad;Alam, Muhammad Ashraful;
7:3:60:7     Ferroelectric properties in thin film barium titanate grown using pulsed laser deposition
DOI:10.1063/1.4895050  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Appleby, Daniel J. R.;Ponon, Nikhil K.;Kwa, Kelvin S. K.;Ganti, Srinivas;Hannemann, Ullrich;Petrov, Peter K.;Alford, Neil M.;O'Neill, Anthony;
7:3:60:8     Multidomain ferroelectricity as a limiting factor for voltage amplification in ferroelectric field-effect transistors
DOI:10.1063/1.3494533  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Cano, A.;Jimenez, D.;
7:3:60:9     Examination of the Possibility of Negative Capacitance Using Ferroelectric Materials in Solid State Electronic Devices
DOI:10.1021/nl1037215  JN:NANO LETTERS  PY:2011
  TC:10  AU: Krowne, C. M.;Kirchoefer, S. W.;Chang, W.;Pond, J. M.;Alldredge, L. M. B.;
7:3:60:10     Negative Capacitance in Organic/Ferroelectric Capacitor to Implement Steep Switching MOS Devices
DOI:10.1021/acs.nanolett.5b01130  JN:NANO LETTERS  PY:2015
  TC:0  AU: Jo, Jaesung;Choi, Woo Young;Park, Jung-Dong;Shim, Jae Won;Yu, Hyun-Yong;Shin, Changhwan;
7:3:60:11     Simulation of electrical characteristics in negative capacitance surrounding-gate ferroelectric field-effect transistors
DOI:10.1063/1.4772982  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Xiao, Y. G.;Chen, Z. J.;Tang, M. H.;Tang, Z. H.;Yan, S. A.;Li, J. C.;Gu, X. C.;Zhou, Y. C.;Ouyang, X. P.;
7:3:60:12     Ferroelectric transistors with improved characteristics at high temperature
DOI:10.1063/1.3467471  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Salvatore, Giovanni A.;Lattanzio, Livio;Bouvet, Didier;Stolichnov, Igor;Setter, Nava;Ionescu, Adrian M.;
7:3:60:13     Experimental evidence of ferroelectric negative capacitance in nanoscale heterostructures (vol 99, 113501, 2011)
DOI:10.1063/1.3675884  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Khan, Asif Islam;Bhowmik, Debanjan;Yu, Pu;Kim, Sung Joo;Pan, Xiaoqing;Ramesh, Ramamoorthy;Salahuddin, Sayeef;
7:3:61:1     Enhanced ferromagnetic and metal insulator transition in Sm0.55Sr0.45MnO3 thin films: Role of oxygen vacancy induced quenched disorder
DOI:10.1063/1.3505327  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Srivastava, M. K.;Siwach, P. K.;Kaur, A.;Singh, H. K.;
7:3:61:2     Comparative study of magnetic and magnetotransport properties of Sm0.55Sr0.45MnO3 thin films grown on different substrates
DOI:10.1063/1.4805077  JN:AIP ADVANCES  PY:2013
  TC:3  AU: Srivastava, Manoj K.;Singh, Sandeep;Siwach, P. K.;Kaur, Amarjeet;Awana, V. P. S.;Maurya, K. K.;Singh, H. K.;
7:3:61:3     Evidence of substrate induced charge order quenching, insulator metal transition, and colossal magnetoresistance in polycrystalline Pr0.58Ca0.42MnO3 thin films
DOI:10.1063/1.3302455  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Agarwal, Vasudha;Prasad, R.;Singh, M. P.;Siwach, P. K.;Srivastava, Amit;Fournier, P.;Singh, H. K.;
7:3:61:4     Impact of strain on metamagnetic transitions in Sm0.5Sr0.5MnO3 thin films
DOI:10.1063/1.4788745  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Srivastava, M. K.;Kaur, A.;Maurya, K. K.;Awana, V. P. S.;Singh, H. K.;
7:3:61:5     Supercooling transition in phase separated manganite thin films: An electrical transport study
DOI:10.1063/1.4880725  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Singh, Sandeep;Kumar, Pawan;Siwach, P. K.;Tyagi, Pawan Kumar;Singh, H. K.;
7:3:61:6     Correlation of the temperature coefficient of resistivity for doped manganites to the transition temperature, polaron binding energy, and magnetic order
DOI:10.1063/1.4724214  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Wang, L. M.;Wang, Chih-Yi;Tseng, Chun-Chin;
7:3:61:7     Remarkable current-enhanced photoconductivity in oxygen-deficient La7/8Sr1/8MnO3-delta thin film
DOI:10.1063/1.4739842  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Hu, L.;Sheng, Z. G.;Huang, Y. N.;Song, W. H.;Sun, Y. P.;
7:3:61:8     Strain, spin disorder, and thickness dependence of magneto-transport in Sm0.55Sr0.45MnO3 films
DOI:10.1063/1.4728988  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Saber, M. M.;Egilmez, M.;Schoofs, F.;Ofer, O.;Mansson, M.;Robinson, J. W. A.;Blamire, M.;Chow, K. H.;Jung, J.;
7:3:61:9     The importance of strain on spin-spin coupling in Pr5/8Ca3/8MnO3 single crystal film
DOI:10.1063/1.4729835  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Fu, Xinwen;Gao, Yuze;Wu, Zhiwei;Zhang, Jincang;Li, Qing;Cao, Guixin;
7:3:61:10     Ultrafast phase separation dynamics in La0.875Sr0.125MnO3 single crystals
DOI:10.1103/PhysRevB.83.113103  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Mertelj, T.;Mamin, R.;Yusupov, R.;Mihailovic, D.;
7:3:61:11     Effect of thickness on magnetic phase coexistence and electrical transport in Nd0.51Sr0.49MnO3 films
DOI:10.1007/s00339-010-5595-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:5  AU: Prasad, R.;Singh, M. P.;Siwach, P. K.;Kaur, A.;Fournier, P.;Singh, H. K.;
7:3:61:12     Morphology and magneto-transport properties of electron doped La0.85Te0.15MnO3 thin film deposited on LaAlO3 substrate
DOI:10.1016/j.materresbull.2014.05.022  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Bhat, Irshad;Husain, Shahid;Patil, S. I.;
7:3:61:13     Magnetic properties of pseudomorphic epitaxial films of Pr0.7Ca0.3MnO3 under different biaxial tensile stresses
DOI:10.1103/PhysRevB.82.014415  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Lehmann, A. Geddo;Congiu, F.;Lampis, N.;Granozio, F. Miletto;Perna, P.;Radovic, M.;di Uccio, U. Scotti;
7:3:61:14     Magnetodielectric Effect in Relaxor Ceramic Pb(In0.5Nb0.5)O-3
DOI:10.1080/00150193.2013.786315  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Gridnev, S. A.;Voskoboinik, M. Yu.;Raevski, I. P.;
7:3:61:15     Out-of-plane low field anisotropic magnetoresistance in Nd0.51Sr0.49MnO3 thin films
DOI:10.1016/j.jmmm.2011.05.032  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:0  AU: Kumar, Pawan;Prasad, R.;Dwivedi, R. K.;Singh, H. K.;
7:3:62:1     Orbital order in La0.5Sr1.5MnO4: Beyond a common local Jahn-Teller picture
DOI:10.1103/PhysRevB.84.155126  JN:PHYSICAL REVIEW B  PY:2011
  TC:13  AU: Wu, Hua;Chang, C. F.;Schumann, O.;Hu, Z.;Cezar, J. C.;Burnus, T.;Hollmann, N.;Brookes, N. B.;Tanaka, A.;Braden, M.;Tjeng, L. H.;Khomskii, D. I.;
7:3:62:2     The electronic and magnetic properties of La0.85Zr0.15MnO3 deposited on SrTiO3 and MgO substrates
DOI:10.1063/1.4884230  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Deshpande, N. G.;Weng, C. H.;Wang, Y. F.;Shao, Y. C.;Cheng, C. Q.;Ling, D. C.;Hsueh, H. C.;Du, C. H.;Tsai, H. M.;Pao, C. W.;Lin, H. J.;Lee, J. F.;Chiou, J. W.;Tsai, M. H.;Pong, W. F.;
7:3:62:3     Magnetic properties and orbital anisotropy driven by Mn2+ in nonstoichiometric LaxMnO3-delta thin films
DOI:10.1103/PhysRevB.83.064418  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Galdi, A.;Aruta, C.;Orgiani, P.;Brookes, N. B.;Ghiringhelli, G.;Moretti Sala, M.;Mangalam, R. V. K.;Prellier, W.;Lueders, U.;Maritato, L.;
7:3:62:4     Off-stoichiometry effect on orbital order in A-site manganites probed by x-ray absorption spectroscopy
DOI:10.1103/PhysRevB.86.115132  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Aruta, C.;Minola, M.;Galdi, A.;Ciancio, R.;Petrov, A. Yu;Brookes, N. B.;Ghiringhelli, G.;Maritato, L.;Orgiani, P.;
7:3:62:5     Multiple double-exchange mechanism by Mn2+ doping in manganite compounds
DOI:10.1103/PhysRevB.82.205122  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Orgiani, P.;Galdi, A.;Aruta, C.;Cataudella, V.;De Filippis, G.;Perroni, C. A.;Ramaglia, V. Marigliano;Ciancio, R.;Brookes, N. B.;Moretti Sala, M.;Ghiringhelli, G.;Maritato, L.;
7:3:62:6     Relationship between orbital structure and lattice distortions in Jahn-Teller systems
DOI:10.1103/PhysRevB.83.205123  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Sboychakov, A. O.;Kugel, K. I.;Rakhmanov, A. L.;Khomskii, D. I.;
7:3:62:7     Synthesis and properties of highly metallic orbital-ordered A-site manganites
DOI:10.1007/s11051-013-1655-9  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:0  AU: Orgiani, Pasquale;Aruta, Carmela;Ciancio, Regina;Galdi, Alice;Maritato, Luigi;
7:3:62:8     Orbital ordering in La0.5Sr1.5MnO4: Density functional and exact diagonalization studies
DOI:10.1103/PhysRevB.87.235137  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Shanavas, K. V.;Satpathy, S.;
7:3:63:1     Epitaxy, strain, and composition effects on metal-insulator transition characteristics of SmNiO3 thin films
DOI:10.1063/1.3598055  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:16  AU: Aydogdu, Gulgun H.;Ha, Sieu D.;Viswanath, B.;Ramanathan, Shriram;
7:3:63:2     Metal-insulator transition and electrically driven memristive characteristics of SmNiO3 thin films
DOI:10.1063/1.3536486  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:14  AU: Ha, Sieu D.;Aydogdu, Gulgun H.;Ramanathan, Shriram;
7:3:63:3     Local charge writing in epitaxial SmNiO3 thin films
DOI:10.1039/c4tc00030g  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:0  AU: Yan, Feng;Schoofs, Frank;Shi, Jian;Ha, Sieu D.;Jaramillo, R.;Ramanathan, Shriram;
7:3:63:4     Examination of insulator regime conduction mechanisms in epitaxial and polycrystalline SmNiO3 thin films
DOI:10.1063/1.3658263  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Ha, Sieu D.;Aydogdu, Gulgun H.;Ramanathan, Shriram;
7:3:63:5     Residual ferroelectricity in barium strontium titanate thin film tunable dielectrics
DOI:10.1063/1.4891717  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:6  AU: Garten, L. M.;Lam, P.;Harris, D.;Maria, J-P.;Trolier-McKinstry, S.;
7:3:63:6     Space charge polarization induced memory in SmNiO3/Si transistors
DOI:10.1063/1.4790394  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Lee, Sang Hyeon;Kim, Moonkyung;Ha, Sieu D.;Lee, Jo-Won;Ramanathan, Shriram;Tiwari, Sandip;
7:3:63:7     In situ stress relaxation and diffraction studies across the metal-insulator transition in epitaxial and polycrystalline SmNiO3 thin films
DOI:10.1016/j.scriptamat.2011.12.018  JN:SCRIPTA MATERIALIA  PY:2012
  TC:1  AU: Viswanath, B.;Aydogdu, G. H.;Ha, S. D.;Ramanathan, S.;
7:3:63:8     Dielectric model of point charge defects in insulating paraelectric perovskites
DOI:10.1063/1.3660376  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Buniatian, V.;Martirosyan, N.;Vorobiev, A.;Gevorgian, S.;
7:3:63:9     Electrical and Fourier transform infrared properties of epitaxial SmNiO3 tensile strained thin film
DOI:10.1063/1.4748982  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Torriss, Badr;Chaker, Mohamed;Margot, Joelle;
7:3:64:1     Persistent two-dimensional growth of (110) manganite films
DOI:10.1063/1.3490713  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Bachelet, R.;Pesquera, D.;Herranz, G.;Sanchez, F.;Fontcuberta, J.;
7:3:64:2     Misfit dislocations of anisotropic magnetoresistant Nd0.45Sr0.55MnO3 thin films grown on SrTiO3 (110) substrates
DOI:10.1016/j.actamat.2012.06.031  JN:ACTA MATERIALIA  PY:2012
  TC:1  AU: Tang, Y. L.;Zhu, Y. L.;Meng, H.;Zhang, Y. Q.;Ma, X. L.;
7:3:64:3     Interplay between crystallographic orientation and electric transport properties in La2/3Sr1/3MnO3 films
DOI:10.1063/1.3339872  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Tebano, A.;Orsini, A.;Di Castro, D.;Medaglia, P. G.;Balestrino, G.;
7:3:64:4     Nanostructured Nd0.45Sr0.55MnO3 films grown on SrTiO3(110)
DOI:10.1557/jmr.2012.416  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:1  AU: Tang, Yunlong;Zhu, Yinlian;Zhang, Yuqin;Zhang, Zhidong;Ma, Xiuliang;
7:3:64:5     Structural and microstructural analyses of crystalline Er2O3 high-k films grown on Si (001) by laser molecular beam epitaxy
DOI:10.1016/j.actamat.2010.11.031  JN:ACTA MATERIALIA  PY:2011
  TC:6  AU: Wang, X.;Zhu, Y. L.;He, M.;Lu, H. B.;Ma, X. L.;
7:3:64:6     Spin-polarized tunneling spectroscopic studies of the intrinsic heterogeneity and pseudogap phenomena in colossal magnetoresistive manganite La0.7Ca0.3MnO3
DOI:10.1103/PhysRevB.82.134441  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Hughes, C. R.;Shi, J.;Beyer, A. D.;Yeh, N. -C.;
7:3:64:7     Half-metallic interface with stronger ferromagnetism in (110)-oriented LaxSr1-xMnO3/SrTiO3 ultrathin superlattices
DOI:10.1063/1.3594241  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Zhu, Y.;Shi, D. N.;Du, C. L.;Shi, Y. G.;Ma, C. L.;Gong, S. J.;Zhang, K. C.;Yang, Z. Q.;
7:3:64:8     Microstructural evolution of [PbZrxTi1-xO3/PbZryTi1-yO3](n) epitaxial multilayers (x/y=0.2/0.4, 0.4/0.6) - dependence on layer thickness
DOI:10.1080/14786430903352656  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:3  AU: Zhu, Y. L.;Zheng, S. J.;Ma, X. L.;Feigl, L.;Alexe, M.;Hesse, D.;Vrejoiu, I.;
7:3:64:9     Annealing effects on a high-k lanthanum oxide film on Si (001) analyzed by aberration-corrected transmission electron microscopy/scanning transmission electron microscopy and electron energy loss spectroscopy
DOI:10.1063/1.3445874  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Inamoto, S.;Yamasaki, J.;Okunishi, E.;Kakushima, K.;Iwai, H.;Tanaka, N.;
7:3:64:10     Electronic picture of spin-polarized tunneling with a Cr tip
DOI:10.1016/j.jmmm.2009.09.041  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:5  AU: Czerner, Michael;Rodary, Guillemin;Wedekind, Sebastian;Fedorov, Dmitry V.;Sander, Dirk;Mertig, Ingrid;Kirschner, Juergen;
7:3:64:11     Interfacial Structure of Erbium Oxide Layer on SUS316 Substrate Formed by MOCVD Method
DOI:10.2320/matertrans.M2014287  JN:MATERIALS TRANSACTIONS  PY:2014
  TC:0  AU: Shinkawa, Takayuki;Matsuda, Kenji;Hishinuma, Yoshimitsu;Nishimura, Katsuhiko;Tanaka, Teruya;Muroga, Takeo;Sato, Takahiro;
7:3:65:1     Intrinsic and precipitate-induced quantum corrections to conductivity in La2/3Sr1/3MnO3 thin films
DOI:10.1103/PhysRevB.85.195128  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Gao, Yuze;Cao, Guixin;Zhang, Jincang;Habermeier, Hanns-Ulrich;
7:3:65:2     Effects of ferroelectric-poling-induced strain on the quantum correction to low-temperature resistivity of manganite thin films
DOI:10.1103/PhysRevB.82.104418  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Jia, R. R.;Zhang, J. C.;Zheng, R. K.;Deng, D. M.;Habermeier, H-U;Chan, H. L. W.;Luo, H. S.;Cao, S. X.;
7:3:65:3     Phase diagram and spin-glass phenomena in electron-doped La1-xHfxMnO3 (0.05 <= x <= 0.3) manganite oxides
DOI:10.1063/1.3666056  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Guo, E. J.;Wang, L.;Wu, Z. P.;Wang, L.;Lu, H. B.;Jin, K. J.;Gao, J.;
7:3:65:4     The oxygen vacancy effect on the magnetic property of the LaMnO3-delta thin films
DOI:10.1063/1.4798550  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Zhao, Ruiqiang;Jin, Kuijuan;Xu, Zhongtang;Guo, Haizhong;Wang, Le;Ge, Chen;Lu, Huibin;Yang, Guozhen;
7:3:65:5     Magnetic field mediated low-temperature resistivity upturn in electron-doped La1-xHfxMnO3 manganite oxides
DOI:10.1063/1.4770320  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Guo, E. J.;Wang, L.;Wu, Z. P.;Wang, L.;Lu, H. B.;Jin, K. J.;Gao, J.;
7:3:65:6     Comment on "Magnetic field mediated low-temperature resistivity upturn in electron-doped La1-xHfxMnO3 manganite oxides" [J. Appl. Phys. 112, 123710 (2012)]
DOI:10.1063/1.4862539  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Rozenberg, E.;
7:3:65:7     Materials News: Interfacial chemistry and atomic arrangement of ZrO2-La2/3Sr1/3MnO3 pillar-matrix structures
DOI:10.1063/1.4904819  JN:APL MATERIALS  PY:2014
  TC:1  AU: Zhou, Dan;Sigle, Wilfried;Okunishi, Eiji;Wang, Yi;Kelsch, Marion;Habermeier, Hanns-Ulrich;van Aken, Peter A.;
7:3:65:8     Optimization on photoelectric detection based on stacked La0.9Sr0.1MnO3-delta/LaAlO3-delta multijunctions
DOI:10.1063/1.3621143  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Xing, Jie;Hao, Hui Ying;Guo, Er Jia;Yang, Fang;
7:3:65:9     Water-induced two-dimensional Kondo-like scattering in Na0.23CoO2 single crystals
DOI:10.1063/1.4772620  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Cao, Guixin;Gao, Yuze;Zhang, Jincang;Lin, Chengtian;
7:3:65:10     Anomalous In-Plane Electronic Scattering in Charge Ordered Na0.41CoO2 center dot 0.6H(2)O
DOI:10.1103/PhysRevLett.108.236401  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:4  AU: Cao, Guixin;Korshunov, Maxim M.;Gao, Yuze;Le Tacon, Mathieu;Singh, David J.;Lin, Chengtian;
7:3:65:11     Effects of lattice deformation on magnetic properties of electron-doped La0.8Hf0.2MnO3 thin films
DOI:10.1063/1.4801336  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Wu, Z. P.;Jiang, Y. C.;Gao, J.;
7:3:65:12     Quantum Hall Ferromagnetism in the Presence of Tunable Disorder
DOI:10.1103/PhysRevLett.106.156806  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:1  AU: Pan, W.;Reno, J. L.;Li, D.;Brueck, S. R. J.;
7:3:66:1     Electrostatic stability of insulating surfaces: Theory and applications
DOI:10.1103/PhysRevB.84.205432  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Stengel, Massimiliano;
7:3:66:2     Lattice screening of the polar catastrophe and hidden in-plane polarization in KNbO3/BaTiO3 interfaces
DOI:10.1103/PhysRevB.87.085305  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Garcia-Fernandez, Pablo;Aguado-Puente, Pablo;Junquera, Javier;
7:3:66:3     Chemistry of Ferroelectric Surfaces
DOI:10.1002/adma.200903723  JN:ADVANCED MATERIALS  PY:2010
  TC:17  AU: Garrity, K.;Kolpak, A. M.;Ismail-Beigi, S.;Altman, E. I.;
7:3:66:4     Ferroelectric surface chemistry: First-principles study of the PbTiO3 surface
DOI:10.1103/PhysRevB.88.045401  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Garrity, Kevin;Kakekhani, Arvin;Kolpak, Alexie;Ismail-Beigi, Sohrab;
7:3:66:5     Domain structures of ferroelectric thin film controlled by oxidizing atmosphere
DOI:10.1063/1.3646387  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Ma, D. C.;Zheng, Yue;Wang, Biao;Woo, C. H.;
7:3:66:6     Strain-Induced High Polarization of a KNbO3 Thin Film on a Single Crystalline Rh Substrate
DOI:10.1111/j.1551-2916.2012.05349.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Lee, Geunhee;Shin, Young-Han;Son, Jong Yeog;
7:3:66:7     Ab Initio Calculations of the Atomic and Electronic Structure of SrZrO3 (111) Surfaces
DOI:10.1080/10584587.2012.731341  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Eglitis, R. I.;
7:3:67:1     Oxygen Control of Atomic Structure and Physical Properties of SrRuO3 Surfaces
DOI:10.1021/nn400923n  JN:ACS NANO  PY:2013
  TC:7  AU: Tselev, Alexander;Ganesh, P.;Qiao, Liang;Siemons, Wolter;Gai, Zheng;Biegalski, Michael D.;Baddorf, Arthur P.;Kalinin, Sergei V.;
7:3:67:2     Oxygen-Induced Surface Reconstruction of SrRuO3 and Its Effect on the BaTiO3 Interface
DOI:10.1021/nn1008337  JN:ACS NANO  PY:2010
  TC:20  AU: Shin, Junsoo;Borisevich, Albina Y.;Meunier, Vincent;Zhou, Jing;Plummer, E. Ward;Kalinin, Sergei V.;Baddorf, Arthur P.;
7:3:67:3     Coexistence of epitaxial lattice rotation and twinning tilt induced by surface symmetry mismatch
DOI:10.1063/1.4881612  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Qiao, L.;Xiao, H. Y.;Weber, W. J.;Biegalski, M. D.;
7:3:67:4     High Chemical Activity of a Perovskite Surface: Reaction of CO with Sr3Ru2O7
DOI:10.1103/PhysRevLett.113.116101  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:1  AU: Stoeger, Bernhard;Hieckel, Marcel;Mittendorfer, Florian;Wang, Zhiming;Fobes, David;Peng, Jin;Mao, Zhiqiang;Schmid, Michael;Redinger, Josef;Diebold, Ulrike;
7:3:67:5     Effects of Reaction Medium on the Phase Synthesis and Particle Size Evolution of BaTiO3
DOI:10.1111/j.1551-2916.2010.03827.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Stawski, Tomasz M.;Veldhuis, Sjoerd A.;Gobel, Ole F.;ten Elshof, Johan E.;Blank, Dave H. A.;
7:3:67:6     Surface and bulk structural properties of single-crystalline Sr3Ru2O7
DOI:10.1103/PhysRevB.81.184104  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Hu, Biao;McCandless, Gregory T.;Menard, Melissa;Nascimento, V. B.;Chan, Julia Y.;Plummer, E. W.;Jin, R.;
7:3:67:7     Influence of high temperature processing of sol-gel derived barium titanate thin films deposited on platinum and strontium ruthenate coated silicon wafers
DOI:10.1016/j.tsf.2012.02.029  JN:THIN SOLID FILMS  PY:2012
  TC:4  AU: Stawski, Tomasz M.;Vijselaar, Wouter J. C.;Gobel, Ole F.;Veldhuis, Sjoerd A.;Smith, Brian F.;Blank, Dave H. A.;ten Elshof, Johan E.;
7:3:67:8     Hysteretic Internal Electric Fields and Polarization Reversal in Ferroelectric Superlattices
DOI:10.1080/00150193.2013.838919  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Lim, Kok-Geng;Chew, Khian-Hooi;Ong, Lye-Hock;
7:3:67:9     Oxygen Control of Atomic Structure and Physical Properties of SrRuO3 Surfaces (vol 7, pg 4403, 2013)
DOI:10.1021/nn405455p  JN:ACS NANO  PY:2013
  TC:0  AU: Tselev, Alexander;Ganesh, P.;Qiao, Liang;Siemons, Wolter;Gai, Zheng;Biegalski, Michael D.;Baddorf, Arthur P.;Kalinin, Sergei V.;
7:3:67:10     Electron microscopy study of intragranular nanoporosity and the occurrence of local structural disorder in cubic BaTiO3 nanopowders from alkoxide-hydroxide precipitation process
DOI:10.1016/j.ceramint.2012.05.017  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Stawski, Tomasz M.;Veldhuis, Sjoerd A.;Gobel, Ole F.;Podstawka-Proniewicz, Edyta;ten Elshof, Johan E.;
7:3:68:1     Common Fermi-liquid origin of T-2 resistivity and superconductivity in n-type SrTiO3
DOI:10.1103/PhysRevB.84.205111  JN:PHYSICAL REVIEW B  PY:2011
  TC:22  AU: van der Marel, D.;van Mechelen, J. L. M.;Mazin, I. I.;
7:3:68:2     Role of localized electrons in electron-hole interaction: The case of SrTiO3
DOI:10.1103/PhysRevB.87.235102  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Sponza, Lorenzo;Veniard, Valerie;Sottile, Francesco;Giorgetti, Christine;Reining, Lucia;
7:3:68:3     Many-body large polaron optical conductivity in SrTi1-xNbxO3
DOI:10.1103/PhysRevB.81.125119  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Devreese, J. T.;Klimin, S. N.;van Mechelen, J. L. M.;van der Marel, D.;
7:3:68:4     Interface superconductivity in LaAlO3-SrTiO3 heterostructures
DOI:10.1103/PhysRevB.89.184514  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Klimin, S. N.;Tempere, J.;Devreese, J. T.;van der Marel, D.;
7:3:68:5     Microscopic mechanisms for the Fermi-liquid behavior of Nb-doped strontium titanate
DOI:10.1103/PhysRevB.86.045113  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Klimin, S. N.;Tempere, J.;van der Marel, D.;Devreese, J. T.;
7:3:68:6     Direct observation of the spatial and temporal dynamics of polaron diffusion in SrTiO3
DOI:10.1103/PhysRevB.87.214301  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Kohmoto, T.;Ikeda, D.;Liang, X.;Moriyasu, T.;
7:3:69:1     Band-to-band photoluminescence in SrTiO3
DOI:10.1103/PhysRevB.82.121103  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Yamada, Yasuhiro;Kanemitsu, Yoshihiko;
7:3:69:2     Oxygen vacancy induced photoluminescence and ferromagnetism in SrTiO3 thin films by molecular beam epitaxy
DOI:10.1063/1.4825257  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Xu, Wenfei;Yang, Jing;Bai, Wei;Tang, Kai;Zhang, Yuanyuan;Tang, Xiaodong;
7:3:69:3     Evidence of oxygen-vacancy-induced ferromagnetic order in single crystal Mn-doped SrTiO3
DOI:10.1063/1.4738785  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Middey, Srimanta;Meneghini, Carlo;Ray, Sugata;
7:3:69:4     Blue photoluminescence and Auger recombination of carriers in SrTiO3 nanoparticles
DOI:10.1063/1.3626594  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Yamada, Yasuhiro;Suzuki, Keigo;Kanemitsu, Yoshihiko;
7:3:69:5     Origin of magnetism in La and Fe doped SrTiO3-delta films
DOI:10.1063/1.3525707  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Egilmez, M.;Leung, G. W.;Hakimi, A. M. H. R.;Blamire, M. G.;
7:3:69:6     Blue light emission from strongly photoexcited and electron-doped SrTiO3
DOI:10.1063/1.3577613  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Yamada, Yasuhiro;Kanemitsu, Yoshihiko;
7:3:69:7     Band-edge luminescence from SrTiO3: No polaron effect
DOI:10.1016/j.tsf.2011.06.087  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Yamada, Yasuhiro;Kanemitsu, Yoshihiko;
7:3:70:1     Si-compatible candidates for high-kappa dielectrics with the Pbnm perovskite structure
DOI:10.1103/PhysRevB.82.064101  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Coh, Sinisa;Heeg, Tassilo;Haeni, J. H.;Biegalski, M. D.;Lettieri, J.;Edge, L. F.;O'Brien, K. E.;Bernhagen, M.;Reiche, P.;Uecker, R.;Trolier-McKinstry, S.;Schlom, Darrell G.;Vanderbilt, David;
7:3:70:2     Terahertz-infrared spectra of the rare-earth scandate DyScO3 single crystal
DOI:10.1063/1.4813496  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Komandin, G. A.;Zhukova, E. S.;Torgashev, V. I.;Boris, A. V.;Boris, A. A.;Motovilova, E. A.;Prokhorov, A. S.;Kadyrov, L. S.;Gorshunov, B. P.;Dressel, M.;
7:3:70:3     Tunable electronic transport properties of DyScO3/SrTiO3 polar heterointerface
DOI:10.1063/1.3570694  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Li, D. F.;Wang, Yan;Dai, J. Y.;
7:3:70:4     Band-gap variation in RScO3 (R = Pr, Nd, Sm, Eu, Gd, Tb, and Dy): X-ray absorption and O K-edge x-ray emission spectroscopies
DOI:10.1103/PhysRevB.86.155124  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Derks, C.;Kuepper, K.;Raekers, M.;Postnikov, A. V.;Uecker, R.;Yang, W. L.;Neumann, M.;
7:3:70:5     First-principles study of intermixing and polarization at the DyScO3/SrTiO3 interface
DOI:10.1103/PhysRevB.85.075314  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Rahmanizadeh, K.;Bihlmayer, G.;Luysberg, M.;Bluegel, S.;
7:3:70:6     Infrared spectroscopy of an epitaxial BaTiO3/SrTiO3 superlattice grown on a (110) SmScO3 substrate
DOI:10.1063/1.4875877  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zelezny, V.;Soukiassian, A.;Schlom, D. G.;Xi, X. X.;
7:3:70:7     Evidence of Substrate-Induced Ferroelectric Phase Transition in SrTiO3 by Means of Thermal Measurements
DOI:10.1080/00150193.2010.484741  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Davitadze, S.;Shnaidshtein, I.;Fadeev, A.;Strukov, B.;Shulman, S.;Noheda, B.;Vlooswijk, A. H. G.;
7:3:70:8     Electronic Structure of Rare-Earth Scandates from X-Ray Spectroscopy and First-Principles Calculations
DOI:10.1080/00150193.2012.743833  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Postnikov, A. V.;Derks, C.;Kuepper, K.;Neumann, M.;
7:3:70:9     The role of B-site cations on proton conductivity in double perovskite oxides La2MgTiO6 and La(2)MgrO(6)
DOI:10.1016/j.ijhydene.2011.11.145  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2012
  TC:0  AU: Vigen, Camilla K.;Bjorheim, Tor Svendsen;Haugsrud, Reidar;
7:3:71:1     Mapping electronic reconstruction at the metal-insulator interface in LaVO3/SrVO3 heterostructures
DOI:10.1103/PhysRevB.88.155123  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Tan, Haiyan;Egoavil, Ricardo;Beche, Armand;Martinez, Gerardo T.;Van Aert, Sandra;Verbeeck, Jo;Van Tendeloo, Gustaaf;Rotella, Helene;Boullay, Philippe;Pautrat, Alain;Prellier, Wilfrid;
7:3:71:2     Optical spectroscopy of the carrier dynamics in LaVO3/SrVO3 superlattices
DOI:10.1103/PhysRevB.84.115132  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Jeong, D. W.;Choi, Woo Seok;Kang, T. D.;Sohn, C. H.;David, A.;Rotella, H.;Sirenko, A. A.;Lee, Cheol Hyeok;Kim, Jae H.;Lueders, U.;Prellier, W.;Kim, Y. -J.;Lee, Yun Sang;Noh, T. W.;
7:3:71:3     Microstructure and interface studies of LaVO3/SrVO3 superlattices
DOI:10.1103/PhysRevB.83.125403  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Boullay, P.;David, A.;Sheets, W. C.;Lueders, U.;Prellier, W.;Tan, H.;Verbeeck, J.;Van Tendeloo, G.;Gatel, C.;Vincze, G.;Radi, Z.;
7:3:71:4     Structural transition in LaVO3/SrVO3 superlattices and its influence on transport properties
DOI:10.1063/1.3593489  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: David, A.;Fresard, R.;Boullay, Ph.;Prellier, W.;Lueders, U.;Janolin, P. -E.;
7:3:71:5     Microstructural analysis of interfaces in a ferromagnetic-multiferroic epitaxial heterostructure
DOI:10.1063/1.3531992  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Krishnan, P. S. Sankara Rama;Arredondo, Miryam;Saunders, Martin;Ramasse, Q. M.;Valanoor, Nagarajan;Munroe, Paul;
7:3:71:6     Presence and spatial distribution of interfacial electronic states in LaMnO3-SrMnO3 superlattices
DOI:10.1103/PhysRevB.82.115112  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Shah, A. B.;Ramasse, Q. M.;May, S. J.;Kavich, Jerald;Wen, J. G.;Zhai, X.;Eckstein, J. N.;Freeland, J.;Bhattacharya, A.;Zuo, J. M.;
7:3:72:1     Vacancy clusters at domain boundaries and band bending at the SrTiO3(110) surface
DOI:10.1103/PhysRevB.90.035436  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wang, Zhiming;Hao, Xianfeng;Gerhold, Stefan;Schmid, Michael;Franchini, Cesare;Diebold, Ulrike;
7:3:72:2     Evolution of the surface structures on SrTiO3(110) tuned by Ti or Sr concentration
DOI:10.1103/PhysRevB.83.155453  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Wang, Zhiming;Yang, Fang;Zhang, Zhiqiang;Tang, Yuanyuan;Feng, Jiagui;Wu, Kehui;Guo, Qinlin;Guo, Jiandong;
7:3:72:3     Cation stoichiometry optimization of SrTiO3 (110) thin films with atomic precision in homogeneous molecular beam epitaxy
DOI:10.1063/1.3681796  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Wang, Zhiming;Feng, Jiagui;Yang, Yang;Yao, Yuan;Gu, Lin;Yang, Fang;Guo, Qinlin;Guo, Jiandong;
7:3:72:4     Strain-Induced Defect Superstructure on the SrTiO3(110) Surface
DOI:10.1103/PhysRevLett.111.056101  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:5  AU: Wang, Zhiming;Li, Fengmiao;Meng, Sheng;Zhang, Jiandi;Plummer, E. W.;Diebold, Ulrike;Guo, Jiandong;
7:3:72:5     Reversible Transition between Thermodynamically Stable Phases with Low Density of Oxygen Vacancies on the SrTiO3(110) Surface
DOI:10.1103/PhysRevLett.107.036103  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:10  AU: Li, Fengmiao;Wang, Zhiming;Meng, Sheng;Sun, Yongbao;Yang, Jinlong;Guo, Qinlin;Guo, Jiandong;
7:3:72:6     Growth of SrTiO3(110) film by oxide molecular beam epitaxy with feedback control
DOI:10.1063/1.4773555  JN:AIP ADVANCES  PY:2012
  TC:5  AU: Feng, Jiagui;Yang, Fang;Wang, Zhiming;Yang, Yang;Gu, Lin;Zhang, Jiandi;Guo, Jiandong;
7:3:73:1     Growth control of stoichiometry in LaMnO3 epitaxial thin films by pulsed laser deposition
DOI:10.1016/j.jcrysgro.2010.07.013  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:9  AU: Marton, Zsolt;Seo, Sung Seok A.;Egami, Takeshi;Lee, Ho Nyung;
7:3:73:2     Near room-temperature magnetoresistance effect in double perovskite La2NiMnO6
DOI:10.1063/1.4808437  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Guo, Yuqiao;Shi, Lei;Zhou, Shiming;Zhao, Jiyin;Liu, Wenjie;
7:3:73:3     Structural and magnetic properties of La2NiMnO6 thin films on LaAlO3 substrate with varying thickness
DOI:10.1016/j.jallcom.2012.10.065  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Kumar, Deepak;Kaur, Davinder;
7:3:73:4     Passivation of the La2NiMnO6 double perovskite to hydroxylation by excess nickel, and the fate of the hydroxylated surface upon heating
DOI:10.1016/j.apsusc.2014.03.134  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:3  AU: Fulmer, Adam T.;Dondlinger, Jasmine;Langell, Marjorie A.;
7:3:73:5     Ferromagnetic resonance in double perovskite epitaxial thin films of La2NiMnO6 on SrTiO3 and NdGaO3 substrates
DOI:10.1063/1.3481678  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Kazan, S.;Mikailzade, F. A.;Ozdemir, M.;Aktas, B.;Rameev, B.;Intepe, A.;Gupta, A.;
7:3:73:6     Influence of substrates on epitaxial growth of B-site-ordered perovskite La2NiMnO6 thin films
DOI:10.1063/1.3641982  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Sakurai, Y.;Ohkubo, I.;Matsumoto, Y.;Koinuma, H.;Oshima, M.;
7:3:73:7     Structural and magnetic properties of Sr2FeMoO6 film prepared by electrophoresis technique
DOI:10.1016/j.jmmm.2013.11.027  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:5  AU: Zhang, Q.;Xu, Z. F.;Liang, J.;Pei, J.;Sun, H. B.;
7:3:73:8     Exchange biasing in SFMO/SFWO double perovskite multilayer thin films
DOI:10.1016/j.jallcom.2011.05.006  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Kumar, Deepak;Kaur, Davinder;
7:3:73:9     Magnetic and magnetotransport properties of Ba2FeMoO6 pulsed laser deposited thin films
DOI:10.1063/1.4761843  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Kim, Kyeong-Won;Ghosh, Siddhartha;Buvaev, Sanal;Mhin, Sungwook;Jones, Jacob L.;Hebard, Arthur F.;Norton, David P.;
7:3:73:10     Epitaxial growth and rectification characteristics of double perovskite oxide La2NiMnO6 films on Nb-SrTiO3 single crystal substrates
DOI:10.1016/j.tsf.2011.03.137  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Gao, G. Y.;Wang, Y.;Jiang, Y.;Fei, L. F.;Chan, N. Y.;Chan, H. L. W.;Wu, W. B.;
7:3:74:1     Ca2MnRuO6: Magnetic Order Arising from Chemical Chaos
DOI:10.1021/cm301007m  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:3  AU: Mishra, Rohan;Soliz, Jennifer R.;Woodward, Patrick M.;Windl, Wolfgang;
7:3:74:2     Electronic structure of SrRu1-xMnxO3 studied by photoemission and x-ray absorption spectroscopy
DOI:10.1103/PhysRevB.81.245127  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Horiba, K.;Kawanaka, H.;Aiura, Y.;Saitoh, T.;Satoh, C.;Kikuchi, Y.;Yokoyama, M.;Nishihara, Y.;Eguchi, R.;Senba, Y.;Ohashi, H.;Kitajima, Y.;Shin, S.;
7:3:74:3     Linking local structure and properties in perovskites containing equal concentrations of manganese and ruthenium
DOI:10.1103/PhysRevB.83.134123  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: King, Graham;Ricciardo, Rebecca A.;Soliz, Jennifer R.;Woodward, Patrick M.;Llobet, Anna;
7:3:74:4     Ab initio and photoemission study of correlation effects in SrRuO3 thin films
DOI:10.1103/PhysRevB.87.035106  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Grebinskij, S.;Masys, S.;Mickevicius, S.;Lisauskas, V.;Jonauskas, V.;
7:3:74:5     Electronic structure of RuSr2EuCu2O8 studied by x-ray absorption and photoemission spectroscopies
DOI:10.1103/PhysRevB.85.014506  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Han, S. W.;Ling, D. C.;Tsai, H. M.;Chuang, C. H.;Wu, S. L.;Pong, W. F.;Chiou, J. W.;Tsai, M-H.;Jang, L. Y.;Lin, H. J.;Pi, T. W.;Lee, J. F.;
7:3:74:6     Effects of charge-orbital order-disorder phenomena on the unoccupied electronic states in the single-layered half-doped Pr0.5Ca1.5MnO4
DOI:10.1103/PhysRevB.87.155118  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Capogrosso, V.;Malvestuto, M.;Handayani, I. P.;van Loosdrecht, P. H. M.;Nugroho, A. A.;Magnano, E.;Parmigiani, F.;
7:3:74:7     Structure and Properties of Sr1-xCaxMn0.5Ru0.5O3 Perovskites: Using Chemical Pressure to Control Mn/Ru Mixed Valency
DOI:10.1021/cm903848h  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:12  AU: Ricciardo, Rebecca A.;Cuthbert, Heather L.;Woodward, Patrick M.;Zhou, Qingdi;Kennedy, Brendan J.;Zhang, Zhaoming;Avdeev, Maxim;Jang, Ling-Yun;
7:3:74:8     Electronic structure of LaNiO3-x thin films studied by x-ray photoelectron spectroscopy and density functional theory
DOI:10.1103/PhysRevB.82.165120  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Masys, S.;Mickevicius, S.;Grebinskij, S.;Jonauskas, V.;
7:3:74:9     Evidence of active role played by the nonmagnetic element Sr in magnetostructural coupling in SrRuO3
DOI:10.1103/PhysRevB.82.094440  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Lahiri, Debdutta;Shibata, T.;Chattopadhyay, S.;Kanungo, Sudipta;Saha-Dasgupta, T.;Singh, R. S.;Sharma, Surinder M.;Maiti, Kalobaran;
7:3:74:10     Soft x-ray synchrotron radiation spectroscopy study of SrMn(1-x)RuxO(3) perovskites (0 <= x <= 1)
DOI:10.1063/1.3360342  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Kim, D. H.;Lee, S. M.;Kolesnik, S.;Dabrowski, B.;Park, B. -G.;Kim, J. -Y.;Lee, Jieun;Min, B. I.;Kang, J. -S.;
7:3:75:1     Interplay of p-d and d-d charge transfer transitions in rare-earth perovskite manganites
DOI:10.1103/PhysRevB.82.035106  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Moskvin, A. S.;Makhnev, A. A.;Nomerovannaya, L. V.;Loshkareva, N. N.;Balbashov, A. M.;
7:3:75:2     Full spin polarization of complex ferrimagnetic bismuth iron garnet probed by magneto-optical Faraday spectroscopy
DOI:10.1103/PhysRevB.87.224408  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Deb, Marwan;Popova, Elena;Fouchet, Arnaud;Keller, Niels;
7:3:75:3     Magnetic-field-induced color change in alpha-Fe2O3 single crystals
DOI:10.1103/PhysRevB.85.174413  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Chen, P.;Lee, N.;McGill, S.;Cheong, S. -W.;Musfeldt, J. L.;
7:3:75:4     Strong magnetorefractive and quadratic magneto-optical effects in (Pr0.4La0.6)(0.7)Ca0.3MnO3
DOI:10.1103/PhysRevB.82.140410  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Caicedo, J. M.;Dekker, M. C.;Doerr, K.;Fontcuberta, J.;Herranz, G.;
7:3:75:5     Short-range magnetic interactions and optical band-edge physics in SrCu2(BO3)(2)
DOI:10.1103/PhysRevB.90.014405  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Cherian, Judy G.;Tokumoto, Takahisa D.;Zhou, Haidong;McGill, Stephen A.;
7:3:75:6     Electron spin resonance and exchange paths in the orthorhombic dimer system Sr2VO4
DOI:10.1103/PhysRevB.86.214417  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;
7:3:75:7     Electronic structure and magnetic symmetry in MnTiO3 analyzed by second harmonic generation
DOI:10.1103/PhysRevB.87.214411  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Cherian, Judy G.;Tokumoto, Takahisa D.;Zhou, Haidong;Choi, Eun Sang;McGill, Stephen A.;
7:3:75:8     Magnetopolaron-induced optical response in transition metal oxides
DOI:10.1103/PhysRevB.89.045121  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Caicedo, J. M.;Fontcuberta, J.;Herranz, G.;
7:3:75:9     Strong magnetorefractive effect in epitaxial La2/3Ca1/3MnO3 thin films
DOI:10.1016/j.jmmm.2009.06.012  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:1  AU: Hrabovsky, D.;Herranz, G.;Caicedo, J. M.;Infante, I. C.;Sanchez, F.;Fontcuberta, J.;
7:3:76:1     Metallicity in LaTiO3 thin films induced by lattice deformation
DOI:10.1103/PhysRevB.81.161101  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Wong, Franklin J.;Baek, Seung-Hyub;Chopdekar, Rajesh V.;Mehta, Virat V.;Jang, Ho-Won;Eom, Chang-Beom;Suzuki, Yuri;
7:3:76:2     Metal-insulator transitions in epitaxial LaVO3 and LaTiO3 films
DOI:10.1103/PhysRevB.86.081401  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: He, C.;Sanders, T. D.;Gray, M. T.;Wong, F. J.;Mehta, V. V.;Suzuki, Y.;
7:3:76:3     Strain-induced interface reconstruction in epitaxial heterostructures
DOI:10.1103/PhysRevB.84.245428  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Lazarides, N.;Paltoglou, V.;Maniadis, P.;Tsironis, G. P.;Panagopoulos, C.;
7:3:76:4     Strain-induced insulator-to-metal transition in LaTiO3 within DFT plus DMFT
DOI:10.1103/PhysRevB.89.161109  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Dymkowski, Krzysztof;Ederer, Claude;
7:3:76:5     Dielectric-permittivity-driven charge carrier modulation at oxide interfaces
DOI:10.1103/PhysRevB.81.241308  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Siemons, Wolter;Huijben, Mark;Rijnders, Guus;Blank, Dave H. A.;Geballe, Theodore H.;Beasley, Malcolm R.;Koster, Gertjan;
7:3:76:6     Pinhole mediated electrical transport across LaTiO3/SrTiO3 and LaAlO3/SrTiO3 oxide hetero-structures
DOI:10.1063/1.4831685  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Kumar, Pramod;Dogra, Anjana;Toutam, Vijaykumar;
7:3:77:1     Defect energetics in SrTiO3 symmetric tilt grain boundaries
DOI:10.1103/PhysRevB.83.104110  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Lee, H. -S.;Mizoguchi, T.;Mistui, J.;Yamamoto, T.;Kang, S. -J. L.;Ikuhara, Y.;
7:3:77:2     Enhanced ferromagnetism in grain boundary of Co-doped ZnO films: A magnetic force microscopy study
DOI:10.1063/1.3593384  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Lin, M. N.;Hsu, H. S.;Lai, J. Y.;Guo, M. C.;Lin, C. Y.;Li, G. Y.;Chen, F. Y.;Huang, J. J.;Chen, S. F.;Liu, C. P.;Huang, J. C. A.;
7:3:77:3     First principles study on oxygen vacancy formation in rock salt-type oxides MO (M: Mg, Ca, Sr and Ba)
DOI:10.1016/j.ceramint.2012.10.079  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Yamamoto, Takashi;Mizoguchi, Teruyasu;
7:3:77:4     Nonrandom Point Defect Configurations and Driving Force Transitions for Grain Boundary Segregation in Trivalent Cation Doped ZrO2
DOI:10.1021/la503338x  JN:LANGMUIR  PY:2014
  TC:4  AU: Yokoi, T.;Yoshiya, M.;Yasuda, H.;
7:3:77:5     Characterization and atomic modeling of an asymmetric grain boundary
DOI:10.1103/PhysRevB.84.195319  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Lee, Hak-Sung;Mizoguchi, Teruyasu;Yamamoto, Takahisa;Kang, Suk-Joong L.;Ikuhara, Yuichi;
7:3:77:6     Phonon thermal transport through tilt grain boundaries in strontium titanate
DOI:10.1063/1.4893648  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zheng, Zexi;Chen, Xiang;Deng, Bowen;Chernatynskiy, Aleksandr;Yang, Shengfeng;Xiong, Liming;Chen, Youping;
7:3:78:1     Analysis of electro-active regions and conductivity of BaMnO3 ceramic by impedance spectroscopy
DOI:10.1007/s00339-013-7981-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Hayat, Khizar;Nadeem, M.;Iqbal, M. Javid;Rafiq, M. A.;Hasan, M. M.;
7:3:78:2     First-principles study of the (001) surface of half-metallic cubic BaCrO3
DOI:10.1016/j.jmmm.2013.05.035  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Liu, N.;Yao, K. L.;Gao, G. Y.;Liu, J. B.;
7:3:78:3     Surface properties of the (001) surface of cubic BaMnO3: A density functional theory study
DOI:10.1063/1.3410797  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Li, N.;Yao, K. L.;Gao, G. Y.;Zhu, L.;Wu, Y. Y.;
7:3:78:4     The half-metallic properties and geometrical structures of cubic BaMnO3 and BaTiO3/BaMnO3 superlattice
DOI:10.1063/1.3567935  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Li, N.;Yao, K. L.;Sun, Z. Y.;Zhu, L.;Gao, G. Y.;
7:3:78:5     Electronic structure and surface properties of cubic perovskite oxide BaMnO3
DOI:10.1016/j.commatsci.2010.11.027  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2011
  TC:7  AU: Gokoglu, Gokhan;Yildirim, Hasan;
7:3:78:6     Electronic structure of antiferromagnetic PbCrO3 (001) surfaces
DOI:10.1016/j.jallcom.2011.06.096  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Yildirim, Hasan;Agduk, Savas;Gokoglu, Gokhan;
7:3:78:7     Impedance spectroscopy study of BNKLT polycrystalline ceramic
DOI:10.1007/s00339-011-6631-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:3  AU: Rajulu, K. Ch. Varada;Tilak, B.;Rao, K. Sambasiva;
7:3:79:1     Labyrinth-type domain structure of heteroepitaxial SrMnO2.5 film
DOI:10.1063/1.4811152  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Kobayashi, Shunsuke;Ikuhara, Yuichi;Yamamoto, Takahisa;
7:3:79:2     Growth of Ruddlesden-Popper type faults in Sr-excess SrTiO3 homoepitaxial thin films by pulsed laser deposition
DOI:10.1063/1.3656340  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Tokuda, Y.;Kobayashi, S.;Ohnishi, T.;Mizoguchi, T.;Shibata, N.;Ikuhara, Y.;Yamamoto, T.;
7:3:79:3     Multiferroicity in manganite/titanate superlattices determined by oxygen pressure-mediated cation defects
DOI:10.1063/1.4802430  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Li, Z.;You, L.;Yang, Z.;Tan, H. R.;Ren, P.;Chen, X. F.;Pan, J. S.;Wang, J. L.;Wang, L.;Bosman, M.;Zhu, W. G.;Dong, Z. L.;
7:3:79:4     Strontium vacancy clustering in Ti-excess SrTiO3 thin film
DOI:10.1063/1.3616136  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Tokuda, Y.;Kobayashi, S.;Ohnishi, T.;Mizoguchi, T.;Shibata, N.;Ikuhara, Y.;Yamamoto, T.;
7:3:79:5     Cation off-stoichiometric SrMnO3-delta thin film grown by pulsed laser deposition
DOI:10.1007/s10853-010-5103-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:4  AU: Kobayashi, S.;Tokuda, Y.;Ohnishi, T.;Mizoguchi, T.;Shibata, N.;Sato, Y.;Ikuhara, Y.;Yamamoto, T.;
7:3:79:6     Quantitative analyses of oxidation states for cubic SrMnO3 and orthorhombic SrMnO2.5 with electron energy loss spectroscopy
DOI:10.1063/1.3520655  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Kobayashi, S.;Tokuda, Y.;Mizoguchi, T.;Shibata, N.;Sato, Y.;Ikuhara, Y.;Yamamoto, T.;
7:3:80:1     Evidence for the formation of two phases during the growth of SrTiO3 on silicon
DOI:10.1103/PhysRevB.83.054105  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Niu, G.;Penuelas, J.;Largeau, L.;Vilquin, B.;Maurice, J. L.;Botella, C.;Hollinger, G.;Saint-Girons, G.;
7:3:80:2     Heteroepitaxy of SrTiO(3) thin films on Si (001) using different growth strategies: Toward substratelike quality
DOI:10.1116/1.3609813  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:7  AU: Niu, G.;Vilquin, B.;Penuelas, J.;Botella, C.;Hollinger, G.;Saint-Girons, G.;
7:3:80:3     Pulsed laser deposition of epitaxial ferroelectric Pb(Zr,Ti)O-3 films on silicon substrates
DOI:10.1016/j.tsf.2011.10.139  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Borowiak, A. S.;Niu, G.;Pillard, V.;Agnus, G.;Lecoeur, Ph.;Albertini, D.;Baboux, N.;Gautier, B.;Vilquin, B.;
7:3:80:4     Capacitance-voltage characteristics of SrTiO3/LaVO3 epitaxial heterostructures
DOI:10.1063/1.3441400  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Choi, Woong;Lee, Sang Yoon;Sands, Timothy D.;
7:3:80:5     Direct epitaxial growth of SrTiO3 on Si (001): Interface, crystallization and IR evidence of phase transition
DOI:10.1016/j.tsf.2010.12.208  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Niu, G.;Peng, W. W.;Saint-Girons, G.;Penuelas, J.;Roy, P.;Brubach, J. B.;Maurice, J-L.;Hollinger, G.;Vilquin, B.;
7:3:80:6     Molecular beam epitaxy of SrTiO3 on GaAs (001): GaAs surface treatment and structural characterization of the oxide layer
DOI:10.1016/j.tsf.2014.02.062  JN:THIN SOLID FILMS  PY:2014
  TC:3  AU: Louahadj, L.;Bachelet, R.;Regreny, P.;Largeau, L.;Dubourdieu, C.;Saint-Girons, G.;
7:3:80:7     Physical origin of in-plane lattice spacing oscillations measured by reflection high-energy electron diffraction during epitaxial growth
DOI:10.1103/PhysRevB.84.195429  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Fuhr, J. D.;Mueller, P.;
7:3:80:8     Atomic and electronic structures of the SrVO3-LaAlO3 interface
DOI:10.1063/1.3601870  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Chi, Miaofang;Mizoguchi, Teruyasu;Martin, Lane W.;Bradley, John P.;Ikeno, Hidekazu;Ramesh, Ramamoorthy;Tanaka, Isao;Browning, Nigel;
7:3:81:1     Oxygen incorporation effects in annealed epitaxial La(1-x)SrxMnO3 thin films
DOI:10.1063/1.3596807  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Petrisor, T., Jr.;Gabor, M. S.;Boulle, A.;Bellouard, C.;Tiusan, C.;Pana, O.;Petrisor, T.;
7:3:81:2     Effect of growth oxygen pressure on anisotropic-strain-induced phase separation in epitaxial La0.67Ca0.33MnO3/NdGaO3(001) films
DOI:10.1063/1.4807293  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Zhi, Bowen;Gao, Guanyin;Huang, Zhen;Wang, Lingfei;Tan, Xuelian;Chen, Pingfan;Wu, Wenbin;
7:3:81:3     Magnetic pinning effects of epitaxial LaxSr1-xMnO3 nanostructured thin films on YBa2Cu3O7-delta layers
DOI:10.1063/1.4748049  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Petrisor, T., Jr.;Gabor, M. S.;Tiusan, C.;Galluzzi, V.;Celentano, G.;Popa, S.;Boulle, A.;Petrisor, T.;
7:3:81:4     Interface engineering using ferromagnetic nanoparticles for enhancing pinning in YBa2Cu3O7-delta thin film
DOI:10.1063/1.3665874  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Jha, Alok K.;Khare, Neeraj;Pinto, R.;
7:3:81:5     Oxygen content dependence of the photovoltaic characteristic of miscut manganite thin films
DOI:10.1063/1.3620984  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Ni, H.;Yu, D.;Zhao, K.;Kong, Y. -C.;Wong, H. K.;Zhao, S. Q.;Zhang, W. S.;
7:3:81:6     Robust high-temperature magnetic pinning induced by proximity in YBa(2)Cu(3)O(7-delta)/La(0.67)Sr(0.33)MnO(3) hybrids
DOI:10.1063/1.3573491  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Chen, C. Z.;Liu, Z. Y.;Lu, Y. M.;Zeng, L.;Cai, C. B.;Zeng, R.;Dou, S. X.;
7:3:81:7     Exchange-bias-modulated inverse superconducting spin switch in CoO/Co/YBa2Cu3O7-delta/La0.7Ca0.3MnO3 thin film hybrids
DOI:10.1103/PhysRevB.81.024512  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Nemes, N. M.;Visani, C.;Sefrioui, Z.;Leon, C.;Santamaria, J.;Iglesias, M.;Mompean, F.;Garcia-Hernandez, M.;
7:3:81:8     Temperature-dependent transport and transient photovoltaic properties of La2/3Ca1/3MnO3/Nb:SrTiO3 heteroepitaxial p-n junction
DOI:10.1063/1.4737256  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Ni, H.;Da, S. L.;Zhao, K.;Kong, Y-C.;Wong, H. K.;Zhao, S. Q.;
7:3:82:1     X-ray interference effects on the determination of structural data in ultrathin La2/3Sr1/3MnO3 epitaxial thin films
DOI:10.1063/1.3663574  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Pesquera, D.;Marti, X.;Holy, V.;Bachelet, R.;Herranz, G.;Fontcuberta, J.;
7:3:82:2     BiFeO3/YBa2Cu3O7-delta heterostructures for strong ferroelectric modulation of superconductivity
DOI:10.1063/1.4774248  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Crassous, A.;Bernard, R.;Fusil, S.;Bouzehouane, K.;Briatico, J.;Bibes, M.;Barthelemy, A.;Villegas, Javier E.;
7:3:82:3     Structural and electrical characterization of ultra-thin SrTiO3 tunnel barriers grown over YBa2Cu3O7 electrodes for the development of high T-c Josephson junctions
DOI:10.1088/0957-4484/23/49/495715  JN:NANOTECHNOLOGY  PY:2012
  TC:4  AU: Aviles Felix, L.;Sirena, M.;Agueero Guzman, L. A.;Gonzalez Sutter, J.;Pons Vargas, S.;Steren, L. B.;Bernard, R.;Trastoy, J.;Villegas, J. E.;Briatico, J.;Bergeal, N.;Lesueur, J.;Faini, G.;
7:3:82:4     High transition temperature superconductor/insulator bilayers for the development of ultra-fast electronics
DOI:10.1063/1.4816416  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Sirena, M.;Aviles Felix, L.;Haberkorn, N.;
7:3:82:5     Roughness influence in the barrier quality of ferroelectric/ferromagnetic tunnel junctions, model, and experiments
DOI:10.1063/1.3642971  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Sirena, M.;
7:3:82:6     Structural and transport characterization of ultra thin Ba0.05Sr0.95TiO3 layers grown over Nb electrodes for the development of Josephson junctions
DOI:10.1063/1.3675332  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Sirena, M.;Aviles Felix, L.;Carvacho Vera, G. A.;Navarro Fernandez, H. L.;Steren, L. B.;Bernard, R.;Briatico, J.;Bergeal, N.;Lesueur, J.;Faini, G.;
7:3:82:7     Characteristics of YBa2Cu3O7-x/SrTiO3/YBa2Cu3O7-x films formed by chemical solution deposition
DOI:10.1016/j.ceramint.2014.05.018  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Wu, Chuanbao;Zhao, Gaoyang;Qiao, Fanyang;
7:3:83:1     Nanoscale monoclinic domains in epitaxial SrRuO3 thin films deposited by pulsed laser deposition
DOI:10.1063/1.4889932  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ghica, C.;Negrea, R. F.;Nistor, L. C.;Chirila, C. F.;Pintilie, L.;
7:3:83:2     Structural phase transition and spontaneous interface reconstruction in La2/3Ca1/3MnO3/BaTiO3 superlattices
DOI:10.1103/PhysRevB.87.035418  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Turner, S.;Lebedev, O. I.;Verbeeck, J.;Gehrke, K.;Moshnyaga, V.;Van Tendeloo, G.;
7:3:83:3     Interface controlled electronic variations in correlated heterostructures
DOI:10.1103/PhysRevB.82.113101  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Gehrke, K.;Moshnyaga, V.;Samwer, K.;Lebedev, O. I.;Verbeeck, J.;Kirilenko, D.;Van Tendeloo, G.;
7:3:83:4     Colossal magnetoresistance of Nd2/3Sr1/3MnO3 ultrathin films grown on charge-ordered Nd1/2Ca1/2MnO3 manganite
DOI:10.1103/PhysRevB.84.104434  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Laverdiere, J.;Jandl, S.;Fournier, P.;
7:3:83:5     SrRuO3 thin films grown on MgO substrates at different oxygen partial pressures
DOI:10.1557/jmr.2012.409  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:3  AU: Zou, Bin;Petrov, Peter K.;Alford, Neil McN;
7:3:83:6     Intrinsic antiferromagnetic coupling underlies colossal magnetoresistance effect: Role of correlated polarons
DOI:10.1103/PhysRevB.89.024420  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Moshnyaga, V.;Belenchuk, A.;Huehn, S.;Kalkert, C.;Jungbauer, M.;Lebedev, O. I.;Merten, S.;Choi, K. -Y.;Lemmens, P.;Damaschke, B.;Samwer, K.;
7:3:84:1     Nanosheet controlled epitaxial growth of PbZr0.52Ti0.48O3 thin films on glass substrates
DOI:10.1063/1.4896991  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Bayraktar, M.;Chopra, A.;Bijkerk, F.;Rijnders, G.;
7:3:84:2     Microstructure and ferroelectric properties of epitaxial cation ordered PbSc0.5Ta0.5O3 thin films grown on electroded and buffered Si(100)
DOI:10.1063/1.4819384  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:9  AU: Chopra, Anuj;Pantel, Daniel;Kim, Yunseok;Alexe, Marin;Hesse, Dietrich;
7:3:84:3     Crystal defects and cation ordering domains in epitaxial PbSc0.5Ta0.5O3 relaxor ferroelectric thin films investigated by high-resolution transmission electron microscopy
DOI:10.1016/j.actamat.2011.03.027  JN:ACTA MATERIALIA  PY:2011
  TC:10  AU: Birajdar, B. I.;Chopra, A.;Alexe, M.;Hesse, D.;
7:3:84:4     Enhanced ferroelectric and dielectric properties of (111)-oriented highly cation-ordered PbSc0.5Ta0.5O3 thin films
DOI:10.1063/1.4846817  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Chopra, Anuj;Birajdar, Balaji I.;Kim, Yunseok;Alexe, Marin;Hesse, Dietrich;
7:3:84:5     Nanoscale bit formation in highly (111)-oriented ferroelectric thin films deposited on glass substrates for high-density storage media
DOI:10.1088/0957-4484/22/24/245705  JN:NANOTECHNOLOGY  PY:2011
  TC:4  AU: Kim, Dae Hong;Kim, Yong Kwan;Hong, Seungbum;Kim, Yunseok;Baik, Sunggi;
7:3:84:6     Local Control over Nucleation of Epitaxial Thin Films by Seed Layers of Inorganic Nanosheets
DOI:10.1021/am4052624  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:8  AU: Nijland, Maarten;Kumar, Suresh;Lubbers, Roy;Blank, Dave H. A.;Rijnders, Guus;Koster, Gertjan;ten Elshof, Johan E.;
7:3:84:7     Structural Transformations of PZT 53/47 Sol-Gel Films on Different Substrates Driven by Thermal Treatments
DOI:10.1080/00150191003795189  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Bruno, Emanuela;Ciuchi, Federica;Castriota, Marco;Marino, Salvatore;Nicastro, Gaetano;Cazzanelli, Enzo;Scaramuzza, Nicola;
7:3:85:1     Colossal dielectric constant and relaxation behaviors in Pr:SrTiO(3) ceramics
DOI:10.1063/1.3359715  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Liu, Cheng;Liu, Peng;Zhou, Jian-ping;He, Ying;Su, Li-na;Cao, Lei;Zhang, Huai-wu;
7:3:85:2     Effects of Gd substitution on microstructures and low temperature dielectric relaxation behaviors of SrTiO3 ceramics
DOI:10.1063/1.4745876  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Fang, Liang;Dong, Wen;Zheng, Fengang;Shen, Mingrong;
7:3:85:3     Photoinduced phase transition and relaxation in bare SrTiO3 single crystals
DOI:10.1063/1.4815950  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Jin, K. X.;Luo, B. C.;Li, Y. F.;Chen, C. L.;Wu, T.;
7:3:85:4     Enhancement of tetragonality and role of strontium vacancies in heterovalent doped SrTiO3
DOI:10.1063/1.3549181  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Tkach, A.;Almeida, A.;Moreira, J. Agostinho;Correia, T. M.;Chaves, M. R.;Okhay, O.;Vilarinho, P. M.;Gregora, I.;Petzelt, J.;
7:3:85:5     Crystal structure, local structure, and defect structure of Pr-doped SrTiO3
DOI:10.1063/1.4737586  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Sluchinskaya, I. A.;Lebedev, A. I.;Erko, A.;
7:3:85:6     Combined experimental and theoretical study of the low temperature dielectric and magnetic properties of trivalent Eu ion doped SrTiO3 ceramics
DOI:10.1063/1.3699044  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Yu, Jiangzhou;Fang, Liang;Cai, Tianyi;Ju, Sheng;Dong, Wen;Zheng, Fengang;Shen, Mingrong;
7:3:86:1     Finite-size versus interface-proximity effects in thin-film epitaxial SrTiO3
DOI:10.1103/PhysRevB.89.241401  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: De Souza, R. A.;Gunkel, F.;Hoffmann-Eifert, S.;Dittmann, R.;
7:3:86:2     Influence of charge compensation mechanisms on the sheet electron density at conducting LaAlO3/SrTiO3-interfaces
DOI:10.1063/1.3679139  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Gunkel, F.;Brinks, P.;Hoffmann-Eifert, S.;Dittmann, R.;Huijben, M.;Kleibeuker, J. E.;Koster, G.;Rijnders, G.;Waser, R.;
7:3:86:3     Stoichiometry dependence and thermal stability of conducting NdGaO3/SrTiO3 heterointerfaces
DOI:10.1063/1.4792509  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Gunkel, F.;Skaja, K.;Shkabko, A.;Dittmann, R.;Hoffmann-Eifert, S.;Waser, R.;
7:3:86:4     High temperature conductance characteristics of LaAlO3/SrTiO3-heterostructures under equilibrium oxygen atmospheres
DOI:10.1063/1.3457386  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Gunkel, F.;Hoffmann-Eifert, S.;Dittmann, R.;Mi, S. B.;Jia, C. L.;Meuffels, P.;Waser, R.;
7:3:87:1     Silicon Surface Deoxidation Using Strontium Oxide Deposited with the Pulsed Laser Deposition Technique
DOI:10.1021/am505202p  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Jovanovic, Zoran;Spreitzer, Matjaz;Kovac, Janez;Klement, Dejan;Suvorov, Danilo;
7:3:87:2     Thermal stability of SrTiO3/SiO2/Si Interfaces at Intermediate Oxygen Pressures
DOI:10.1063/1.3460098  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Yong, G. J.;Kolagani, Rajeswari M.;Adhikari, S.;Vanderlinde, W.;Liang, Y.;Muramatsu, K.;Friedrich, S.;
7:3:87:3     Real-time spectroscopic ellipsometric investigation of adsorption and desorption in atomic layer deposition: A case study for the strontium bis(tri-isopropylcyclopentadienyl)/water process
DOI:10.1116/1.3664757  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2012
  TC:4  AU: Wang, Han;Jiang, Xiaoqiang;Willis, Brian G.;
7:3:87:4     Formation of strontium template on Si(1 0 0) by atomic layer deposition
DOI:10.1016/j.apsusc.2010.12.098  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:10  AU: Zhang, C. B.;Wielunski, L.;Willis, B. G.;
7:3:87:5     Thermal chemistry of Mn-2(CO)(10) during deposition of thin manganese films on silicon oxide and on copper surfaces
DOI:10.1116/1.3658373  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2012
  TC:12  AU: Qin, Xiangdong;Sun, Huaxing;Zaera, Francisco;
7:3:87:6     Epitaxial integration of photoresponsive Bi0.4Ca0.6MnO3 with Si(001)
DOI:10.1063/1.3561371  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Yong, Grace J.;Kolagani, Rajeswari M.;Hofmann, Benjamin P.;Adhikari, Sanjay;Liang, Yong;Smolyaninova, Vera N.;
7:3:88:1     Evolution of ferromagnetism in orthorhombic perovskites Sr1-xPbxRuO3
DOI:10.1103/PhysRevB.81.134412  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Cheng, J. -G.;Zhou, J. -S.;Goodenough, J. B.;
7:3:88:2     Electrical and magnetic properties of the complete solid solution series between SrRuO3 and LaRhO3: Filling t(2g) versus tilting
DOI:10.1103/PhysRevB.83.064417  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Barton, Phillip T.;Seshadri, Ram;Rosseinsky, Matthew J.;
7:3:88:3     Pressure dependence of the superconducting transition temperature of the filled skutterudite YFe4P12
DOI:10.1103/PhysRevB.88.024514  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Cheng, J. -G.;Zhou, J. -S.;Matsubayashi, K.;Kong, P. P.;Kubo, Y.;Kawamura, Y.;Sekine, C.;Jin, C. Q.;Goodenough, J. B.;Uwatoko, Y.;
7:3:88:4     Evidence of three-dimensional Ising ferromagnetism in the A-site-ordered perovskite CaCu3Ge4O12
DOI:10.1103/PhysRevB.83.212403  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Cheng, J-G.;Zhou, J-S.;Goodenough, J. B.;Su, Y. T.;Sui, Y.;
7:3:88:5     High-pressure effects in anti-post-perovskite superconductors V(3)PnN(x) (Pn = P, As)
DOI:10.1103/PhysRevB.89.144510  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Wang, B. S.;Cheng, J. -G.;Matsubayashi, K.;Uwatoko, Y.;Ohgushi, K.;
7:3:88:6     Perspective on Engineering Transition-Metal Oxides
DOI:10.1021/cm402063u  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:7  AU: Goodenough, John B.;
7:3:88:7     High-pressure effects in anti-post-perovskite superconductors V(3)PnN(x) (Pn = P, As) (vol 89, 144510, 2014)
DOI:10.1103/PhysRevB.90.139901  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wang, B. S.;Cheng, J. -G.;Matsubayashi, K.;Uwatoko, Y.;Ohgushi, K.;
7:3:89:1     Temperature dependence of magnetic properties of La0.7Sr0.3MnO3/SrTiO3 thin films on silicon substrates
DOI:10.1103/PhysRevB.81.054410  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Belmeguenai, M.;Mercone, S.;Adamo, C.;Mechin, L.;Fur, C.;Monod, P.;Moch, P.;Schlom, D. G.;
7:3:89:2     Thickness dependence of dynamic and static magnetic properties of pulsed laser deposited La0.7Sr0.3MnO3 films on SrTiO3(001)
DOI:10.1016/j.jmmm.2014.06.038  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Monsen, Asmund;Boschker, Jos E.;Macia, Ferran;Wells, Justin W.;Nordblad, Per;Kent, Andrew D.;Mathieu, Roland;Tybell, Thomas;Wahlstrom, Erik;
7:3:89:3     Qualitative determination of surface roughness by in situ reflection high energy electron diffraction
DOI:10.1063/1.3701610  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Boschker, J. E.;Tybell, T.;
7:3:89:4     La0.7Sr0.3MnO3 thin films on SrTiO3 and CaTiO3 buffered Si substrates: structural, static, and dynamic magnetic properties
DOI:10.1007/s11051-011-0334-y  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:2  AU: Belmeguenai, M.;Mercone, S.;Adamo, C.;Chauveau, T.;Mechin, L.;Monod, P.;Moch, P.;Schlom, D. G.;
7:3:89:5     Easy-plane magnetocrystalline anisotropy of compressive strained (La, Ba)MnO3 film
DOI:10.1063/1.4733943  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Jin ZengTian;Wei, Tong;Li, Bing;Yang, Lei;Duanmu, Qingyong;Wang, Xiaoping;Zhu, Hong;
7:3:89:6     Structural and magnetic properties of La0.7Sr0.3MnO3 thin films integrated onto Si(100) substrates with SrTiO3 as buffer layer
DOI:10.1063/1.3565422  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Belmeguenai, M.;Mercone, S.;Adamo, C.;Moch, P.;Schlom, D. G.;Monod, P.;
7:3:90:1     Interface Engineered BaTiO3/SrTiO3 Heterostructures with Optimized High-Frequency Dielectric Properties
DOI:10.1021/am301066u  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:17  AU: Liu, Ming;Ma, Chunrui;Collins, Gregory;Liu, Jian;Chen, Chonglin;Dai, Chao;Lin, Yuan;Shui, Li;Xiang, Feng;Wang, Hong;He, Jie;Jiang, Jiechao;Meletis, Efstathios I.;Cole, Melanie W.;
7:3:90:2     Strain relaxation in epitaxial (Pb,Sr)TiO3 thin films on NdGaO3 substrates
DOI:10.1063/1.3357435  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Lin, Y.;Dai, C.;Li, Y. R.;Chen, X.;Chen, C. L.;Bhalla, A.;Jia, Q. X.;
7:3:90:3     Interface structures and strain relaxation mechanisms of ferroelectric BaTiO3/SrTiO3 multilayers on (001) MgO substrates
DOI:10.1016/j.jcrysgro.2013.08.003  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:0  AU: Ding, Ying;Chen, Jianghua;He, Junming;Liu, Ming;Ma, Chunrui;Chen, Chonglin;
7:3:90:4     The effects of strain relaxation on the dielectric properties of epitaxial ferroelectric Pb(Zr0.2Ti0.8)TiO3 thin films
DOI:10.1063/1.4885551  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Khan, Asif Islam;Yu, Pu;Trassin, Morgan;Lee, Michelle J.;You, Long;Salahuddin, Sayeef;
7:3:90:5     Microstructure Analysis of Ferroelectric BaTiO3/SrTiO3 Heterostructures on LaAlO3 Substrates by High Resolution X-ray Diffraction
DOI:10.1080/00150193.2014.922836  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Dai, C.;Liu, M.;Ma, C. R.;Chen, C. L.;Lin, Y.;
7:3:90:6     Microwave Dielectric Properties of Mn-doped (Ba,Sr)TiO3//Ba(Zr,Ti)O-3 Multilayered Thin Films: Optimization of Designed Structure
DOI:10.1080/10584587.2014.874838  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:2  AU: Liu, Ming;Ma, Chunrui;Liu, Jian;Collins, Gregory;Chen, Chonglin;Xiang, Feng;Wang, Hong;He, Jie;Jiang, Jiechao;Meletis, Efstathios I.;Bhalla, Amar;
7:3:91:1     First Order Colossal Magnetoresistance Transitions in the Two-Orbital Model for Manganites
DOI:10.1103/PhysRevLett.105.097203  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:20  AU: Sen, Cengiz;Alvarez, Gonzalo;Dagotto, Elbio;
7:3:91:2     Theory for charge and orbital density-wave states in manganite La0.5Sr1.5MnO4
DOI:10.1103/PhysRevB.87.155103  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Yao, Zi-Jian;Chen, Wei-Qiang;Gao, Jin-Hua;Jiang, Hong-Min;Zhang, Fu-Chun;
7:3:91:3     Bridging Charge-Orbital Ordering and Fermi Surface Instabilities in Half-Doped Single-Layered Manganite La0.5Sr1.5MnO4
DOI:10.1103/PhysRevLett.105.147201  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:9  AU: Evtushinsky, D. V.;Inosov, D. S.;Urbanik, G.;Zabolotnyy, V. B.;Schuster, R.;Sass, P.;Haenke, T.;Hess, C.;Buechner, B.;Follath, R.;Reutler, P.;Revcolevschi, A.;Kordyuk, A. A.;Borisenko, S. V.;
7:3:91:4     Electronic Confinement and Ordering Instabilities in Colossal Magnetoresistive Bilayer Manganites
DOI:10.1103/PhysRevLett.108.016403  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:2  AU: Trinckauf, J.;Haenke, T.;Zabolotnyy, V.;Ritschel, T.;Apostu, M. O.;Suryanarayanan, R.;Revcolevschi, A.;Koepernik, K.;Kim, T. K.;v. Zimmermann, M.;Borisenko, S. V.;Knupfer, M.;Buechner, B.;Geck, J.;
7:3:91:5     Quantum many-body interactions in digital oxide superlattices
DOI:10.1038/NMAT3405  JN:NATURE MATERIALS  PY:2012
  TC:30  AU: Monkman, Eric J.;Adamo, Carolina;Mundy, Julia A.;Shai, Daniel E.;Harter, John W.;Shen, Dawei;Burganov, Bulat;Muller, David A.;Schlom, Darrell G.;Shen, Kyle M.;
7:3:92:1     Four-States Multiferroic Memory Embodied Using Mn-Doped BaTiO3 Nanorods
DOI:10.1021/nn4017422  JN:ACS NANO  PY:2013
  TC:12  AU: Son, Jong Yeog;Lee, Jung-Hoon;Song, Seungwoo;Shin, Young-Han;Jang, Hyun Myung;
7:3:92:2     Effects of Ti-doping on evolution of coexisting magnetic phases in BaFeO3-delta thin films at room temperature
DOI:10.1063/1.4883182  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Aziz, Fozia;Chandra, Mahesh;Khare, Amit;Pandey, Parul;Mavani, K. R.;
7:3:92:3     AFM Observations of Domain Structures in Thin Films of BiFeO3
DOI:10.1080/00150193.2011.578938  JN:FERROELECTRICS  PY:2011
  TC:2  AU: Kibien, I.;Kowalczyk, R.;Przeslawski, J.;
7:3:92:4     Imprint Control of Nonvolatile Shape Memory with Asymmetric Ferroelectric Multilayers
DOI:10.1021/cm5029782  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:0  AU: Kim, Woo-Hee;Son, Jong Yeog;Shin, Young-Han;Jang, Hyun Myung;
7:3:92:5     Temperature Dependent Surface Images of KFe(MoO4)(2) Observed by Atomic Force Microscopy
DOI:10.1080/00150193.2012.743780  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Kowalczyk, R.;Zapart, M. B.;Zapart, W.;
7:3:93:1     Effects of Atomic Collisions on the Stoichiometry of Thin Films Prepared by Pulsed Laser Deposition
DOI:10.1103/PhysRevLett.111.036101  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Packwood, Daniel M.;Shiraki, Susumu;Hitosugi, Taro;
7:3:93:2     Quality control of epitaxial LiCoO2 thin films grown by pulsed laser deposition
DOI:10.1557/JMR.2010.0250  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:15  AU: Ohnishi, T.;Hang, B. T.;Xu, X.;Osada, M.;Takada, K.;
7:3:93:3     Pulsed-laser deposition of superconducting LiTi2O4 ultrathin films
DOI:10.1016/j.jcrysgro.2015.03.020  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Oshima, Takayoshi;Yokoyama, Kosuke;Niwa, Mifuyu;Ohtomo, Akira;
7:3:93:4     Growth processes of lithium titanate thin films deposited by using pulsed laser deposition
DOI:10.1063/1.4752466  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Kumatani, Akichika;Ohsawa, Takeo;Shimizu, Ryota;Takagi, Yoshitaka;Shiraki, Susumu;Hitosugi, Taro;
7:3:93:5     Fabrication of thin-film lithium batteries with 5-V-class LiCoMnO4 cathodes
DOI:10.1016/j.ssi.2013.09.054  JN:SOLID STATE IONICS  PY:2014
  TC:3  AU: Kuwata, Naoaki;Kudo, Shota;Matsuda, Yasutaka;Kawamura, Junichi;
7:3:93:6     Nazca Lines by La ordering in La2/3-xLi3xTiO3 ion-conductive perovskite
DOI:10.1063/1.4744886  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Mitsuishi, K.;Ohnishi, T.;Tanaka, Y.;Watanabe, K.;Sakaguchi, I.;Ishida, N.;Takeguchi, M.;Ohno, T.;Fujita, D.;Takada, K.;
7:3:94:1     Noninvasive embedding of single Co atoms in Ge(111)2 x 1 surfaces
DOI:10.1103/PhysRevB.85.125412  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Muzychenko, D. A.;Schouteden, K.;Houssa, M.;Savinov, S. V.;Van Haesendonck, C.;
7:3:94:2     Interface and nanostructure evolution of cobalt germanides on Ge(001)
DOI:10.1063/1.4865955  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Grzela, T.;Koczorowski, W.;Capellini, G.;Czajka, R.;Radny, M. W.;Curson, N.;Schofield, S. R.;Schubert, M. A.;Schroeder, T.;
7:3:94:3     Formation of Co/Ge intermixing layers after Co deposition on Ge(111)2 x 1 surfaces
DOI:10.1088/0957-4484/23/43/435605  JN:NANOTECHNOLOGY  PY:2012
  TC:2  AU: Muzychenko, D. A.;Schouteden, K.;Panov, V. I.;Van Haesendonck, C.;
7:3:94:4     Electronic structure of Co islands grown on the root 3 x root 3-Ag/Ge(111) surface
DOI:10.1016/j.tsf.2011.03.061  JN:THIN SOLID FILMS  PY:2011
  TC:6  AU: Huang, Xiao-Lan;Chou, Chi-Hao;Lin, Chun-Liang;Tomaszewska, Agnieszka;Fu, Tsu-Yi;
7:3:94:5     Low-temperature scanning tunneling microscopy and spectroscopy of spatial oscillations in the density of states near domain boundaries at the Ge(111)2X1 surface
DOI:10.1103/PhysRevB.81.035313  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Muzychenko, D. A.;Savinov, S. V.;Mantsevich, V. N.;Maslova, N. S.;Panov, V. I.;Schouteden, K.;Van Haesendonck, C.;
7:3:94:6     Thermal evolution of Co on the coexisting Ag/Ge(111)-root 3 x root 3 and Ag/Ge(111)-4 x 4 phases
DOI:10.1007/s11051-012-1257-y  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2012
  TC:4  AU: Huang, Xiao-Lan;Tomaszewska, Agnieszka;Chou, Chi-Hao;Hsu, Chung-Yu;Lin, Chun-Liang;Fu, Tsu-Yi;
7:3:94:7     Creation and annihilation of single atom vacancy during subsurface diffusion
DOI:10.1103/PhysRevB.82.201305  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Choi, Junghun;Lim, Do Kyung;Kim, Youngwoo;Kim, Do Hwan;Kim, Sehun;
7:3:95:1     Probing orbital fluctuations in RVO3 (R = Y, Gd, or Ce) by ellipsometry
DOI:10.1103/PhysRevB.86.125128  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Reul, J.;Nugroho, A. A.;Palstra, T. T. M.;Grueninger, M.;
7:3:95:2     Temperature-dependent optical conductivity of layered LaSrFeO4
DOI:10.1103/PhysRevB.87.205142  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Reul, J.;Fels, L.;Qureshi, N.;Shportko, K.;Braden, M.;Grueninger, M.;
7:3:95:3     Direct probe of Mott-Hubbard to charge-transfer insulator transition and electronic structure evolution in transition-metal systems
DOI:10.1103/PhysRevB.83.241102  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Olalde-Velasco, P.;Jimenez-Mier, J.;Denlinger, J. D.;Hussain, Z.;Yang, W. L.;
7:3:95:4     First-principles study of magnetoelastic effect in the difluoride compounds MF2 (M = Mn, Fe, Co, Ni)
DOI:10.1103/PhysRevB.86.054422  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Das, Hena;Kanungo, Sudipta;Saha-Dasgupta, T.;
7:3:95:5     Atomic multiplets at the L-2,L-3 edge of 3d transition metals and the ligand K edge in x-ray absorption spectroscopy of ionic systems
DOI:10.1103/PhysRevB.87.245136  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Olalde-Velasco, P.;Jimenez-Mier, J.;Denlinger, J.;Yang, W. -L.;
7:3:95:6     First-principles study of magnetoelastic effect in the difluoride compounds MF2 (M = Mn, Fe, Co, Ni) (vol 86, 054422, 2012)
DOI:10.1103/PhysRevB.87.059902  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Das, Hena;Kanungo, Sudipta;Saha-Dasgupta, T.;
7:3:96:1     Artificial Construction of the Layered Ruddlesden-Popper Manganite La2Sr2Mn3O10 by Reflection High Energy Electron Diffraction Monitored Pulsed Laser Deposition
DOI:10.1021/ja211138x  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:4  AU: Palgrave, Robert G.;Borisov, Pavel;Dyer, Matthew S.;McMitchell, Sean R. C.;Darling, George R.;Claridge, John B.;Batuk, Maria;Tan, Haiyan;Tian, He;Verbeeck, Jo;Hadermann, Joke;Rosseinsky, Matthew J.;
7:3:96:2     Cation-ordering effects in the single layered manganite La2/3Sr4/3MnO4
DOI:10.1063/1.3554387  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Nelson-Cheeseman, B. B.;Shah, A. B.;Santos, T. S.;Bader, S. D.;Zuo, J. -M.;Bhattacharya, A.;
7:3:96:3     Polar Cation Ordering: A Route to Introducing > 10% Bond Strain Into Layered Oxide Films
DOI:10.1002/adfm.201401077  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:5  AU: Nelson-Cheeseman, Brittany B.;Zhou, Hua;Balachandran, Prasanna V.;Fabbris, Gilberto;Hoffman, Jason;Haskel, Daniel;Rondinelli, James M.;Bhattacharya, Anand;
7:3:96:4     Strain engineering in epitaxial La1-xSr1+xMnO4 thin films
DOI:10.1063/1.4790654  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Vafaee, Mehran;Baghaie Yazdi, Mehrdad;Radetinac, Aldin;Cherkashinin, Gennady;Komissinskiy, Philipp;Alff, Lambert;
7:3:96:5     Atomic-layer synthesis and imaging uncover broken inversion symmetry in La2-xSrxCuO4 films
DOI:10.1103/PhysRevB.87.014108  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Yacoby, Yizhak;Zhou, Hua;Pindak, Ron;Bozovic, Ivan;
7:3:97:1     Sr flux stability against oxidation in oxide-molecular-beam-epitaxy environment: Flux, geometry, and pressure dependence
DOI:10.1116/1.3298880  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2010
  TC:7  AU: Kim, Y. S.;Bansal, Namrata;Chaparro, Carlos;Gross, Heiko;Oh, Seongshik;
7:3:97:2     Self-corrected sensors based on atomic absorption spectroscopy for atom flux measurements in molecular beam epitaxy
DOI:10.1063/1.4873544  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Du, Y.;Droubay, T. C.;Liyu, A. V.;Li, G.;Chambers, S. A.;
7:3:97:3     Crucible aperture: An effective way to reduce source oxidation in oxide molecular beam epitaxy process
DOI:10.1116/1.3449051  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2010
  TC:4  AU: Kim, Yong-Seung;Bansal, Namrata;Oh, Seongshik;
7:3:97:4     Etalon-induced baseline drift and correction in atom flux sensors based on atomic absorption spectroscopy
DOI:10.1063/1.4898638  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Du, Yingge;Chambers, Scott A.;
7:3:97:5     Simple self-gettering differential-pump for minimizing source oxidation in oxide-MBE environment
DOI:10.1116/1.3591384  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2011
  TC:1  AU: Kim, Yong-Seung;Bansal, Namrata;Oh, Seongshik;
7:3:98:1     Phase transitions in [001]-oriented morphotropic PbZr0.52Ti0.48O3 thin film deposited onto SrTiO3-buffered Si substrate
DOI:10.1063/1.4881818  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Shi, Yin;Cueff, M.;Niu, Gang;Le Rhun, G.;Vilquin, B.;Saint Girons, G.;Bachelet, R.;Gautier, B.;Robach, Y.;Gemeiner, P.;Guiblin, N.;Defay, E.;Dkhil, B.;
7:3:98:2     Sol-gel deposition and piezoelectric properties of {110}-oriented Pb(Zr0.52Ti0.48)O-3 thin films
DOI:10.1063/1.3293446  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Ambika, D.;Kumar, Viswanathan;Imai, Hideyuki;Kanno, Isaku;
7:3:98:3     Phase-formation, microstructure, and piezoelectric/dielectric properties of BiYO3-doped Pb(Zr0.53Ti0.47)O-3 for piezoelectric energy harvesting devices
DOI:10.1016/j.ceramint.2013.04.031  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Yoon, Man-Soon;Mahmud, Iqbal;Ur, Soon-Chul;
7:3:98:4     Vibration energy harvesting using highly (001)-oriented Pb(Zr, Ti)O(3) thin film
DOI:10.1063/1.3406253  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:20  AU: Harigai, Takakiyo;Adachi, Hideaki;Fujii, Eiji;
7:3:98:5     Temperature dependence of the transverse piezoelectric coefficient of thin films and aging effects
DOI:10.1063/1.4862045  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Rossel, C.;Sousa, M.;Abel, S.;Caimi, D.;Suhm, A.;Abergel, J.;Le Rhun, G.;Defay, E.;
7:3:98:6     Preparation of PZT-based piezoceramics with transgranular fracture mode
DOI:10.1016/j.ceramint.2011.04.088  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Yue, Rui-fang;He, Wen-ze;An, Fei-fei;Yu, Jian;Chen, Guo-chao;
7:3:98:7     Influence of lithium doping on the structural and electrical characteristics of ZnO thin films
DOI:10.1016/j.tsf.2012.04.036  JN:THIN SOLID FILMS  PY:2012
  TC:2  AU: Johny, T. Anto;Kumar, Viswanathan;Imai, Hideyuki;Kanno, Isaku;
7:3:99:1     Probing bonding and electronic structure at atomic resolution with spectroscopic imaging
DOI:10.1557/mrs.2011.336  JN:MRS BULLETIN  PY:2012
  TC:7  AU: Botton, Gianluigi A.;
7:3:99:2     Element Specific Monolayer Depth Profiling
DOI:10.1002/adma.201402028  JN:ADVANCED MATERIALS  PY:2014
  TC:1  AU: Macke, Sebastian;Radi, Abdullah;Hamann-Borrero, Jorge E.;Verna, Adriano;Bluschke, Martin;Brueck, Sebastian;Goering, Eberhard;Sutarto, Ronny;He, Feizhou;Cristiani, Georg;Wu, Meng;Benckiser, Eva;Habermeier, Hanns-Ulrich;Logvenov, Gennady;Gauquelin, Nicolas;Botton, Gianluigi A.;Kajdos, Adam P.;Stemmer, Susanne;Sawatzky, George A.;Haverkort, Maurits W.;Keimer, Bernhard;Hinkov, Vladimir;
7:3:99:3     Local electronic structure analysis for brownmillerite Ca(Sr)FeO2.5 using site-resolved energy-loss near-edge structures
DOI:10.1063/1.3610526  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Haruta, M.;Kurata, H.;Matsumoto, K.;Inoue, S.;Shimakawa, Y.;Isoda, S.;
7:3:99:4     OXIDE INTERFACES Instrumental insights
DOI:10.1038/nmat3425  JN:NATURE MATERIALS  PY:2012
  TC:1  AU: Rondinelli, James M.;May, Steven J.;
7:3:100:1     Pt-induced nanowires on Ge(001): A density functional theory study
DOI:10.1103/PhysRevB.81.085410  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Vanpoucke, Danny E. P.;Brocks, Geert;
7:3:100:2     Atomic configuration and phase transition of Pt-induced nanowires on a Ge(001) surface studied using scanning tunneling microscopy, reflection high-energy positron diffraction, and angle-resolved photoemission spectroscopy
DOI:10.1103/PhysRevB.85.245438  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Mochizuki, Izumi;Fukaya, Yuki;Kawasuso, Atsuo;Yaji, Koichiro;Harasawa, Ayumi;Matsuda, Iwao;Wada, Ken;Hyodo, Toshio;
7:3:100:3     Fermi gas behavior of a one-dimensional metallic band of Pt-induced nanowires on Ge(001)
DOI:10.1103/PhysRevB.87.241413  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Yaji, K.;Mochizuki, I.;Kim, S.;Takeichi, Y.;Harasawa, A.;Ohtsubo, Y.;Le Fevre, P.;Bertran, F.;Taleb-Ibrahimi, A.;Kakizaki, A.;Komori, F.;
7:3:100:4     CO adsorption on Pt-induced Ge nanowires
DOI:10.1103/PhysRevB.81.235434  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Vanpoucke, Danny E. P.;Brocks, Geert;
7:3:100:5     Density functional theory study of Pt-induced Ge(001) reconstructions
DOI:10.1103/PhysRevB.81.035333  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Vanpoucke, Danny E. P.;Brocks, Geert;
7:3:100:6     First-principles investigation of CO adsorption on Pt/Ge(001)-(4 x 2)
DOI:10.1016/j.commatsci.2010.06.043  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2010
  TC:1  AU: Krivosheeva, A. V.;Sanna, S.;Schmidt, W. G.;
7:3:101:1     Magnetic, transport, and structural properties of SrRuO3 thin films
DOI:10.1063/1.4868333  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Majcher, A. M.;Rode, K.;Coey, J. M. D.;Stamenov, P.;
7:3:101:2     Fermi level spin polarization of polycrystalline thulium by point contact Andreev reflection spectroscopy
DOI:10.1063/1.3554254  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Stamenov, P.;Coey, J. M. D.;
7:3:101:3     Point Contact Andreev Reflection from Erbium: The role of external magnetic field and the sign of the spin polarization
DOI:10.1063/1.3679451  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Stamenov, P.;
7:3:101:4     High field magnetotransport and point contact Andreev reflection measurements on CuCr2Se4 and CuCr2Se3Br-Degenerate magnetic semiconductor single crystals
DOI:10.1063/1.4861683  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Borisov, K.;Alaria, J.;Coey, J. M. D.;Stamenov, P.;
7:3:101:5     Point contact Andreev reflection from semimetallic bismuth-The roles of the minority carriers and the large spin-orbit coupling
DOI:10.1063/1.4796049  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Stamenov, P.;
7:3:101:6     Magnetic, transport, and structural properties of SrRuO3 thin films (vol 115, 17C735, 2014)
DOI:10.1063/1.4871336  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Majcher, A. M.;Rode, K.;Coey, J. M. D.;Stamenov, P.;
7:3:102:1     Complex phase separation in La0.6Ca0.4MnO3 films revealed by electron spin resonance
DOI:10.1103/PhysRevB.83.184404  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Tovstolytkin, A. I.;Dzyublyuk, V. V.;Podyalovskii, D. I.;Moya, X.;Israel, C.;Sanchez, D.;Vickers, M. E.;Mathur, N. D.;
7:3:102:2     Strain induced magnetic domain evolution and spin reorientation transition in epitaxial manganite films
DOI:10.1063/1.4734732  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Singh, Gyanendra;Rout, P. K.;Porwal, Rajni;Budhani, R. C.;
7:3:102:3     Structural first-order transformation in La2/3Ba1/3MnO3: ESR study
DOI:10.1016/j.jmmm.2012.07.054  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Polishchuk, D. M.;Tovstolytkin, A. I.;Fertman, Elena;Desnenko, Vladimir;Beznosov, Anatoly;Kajnakova, Marcela;Feher, Alexander;
7:3:102:4     Ferromagnetic resonance in strained and relaxed regions of (La,Na)MnO3/LaAlO3 (001) films
DOI:10.1016/j.jmmm.2013.03.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Polishchuk, D. M.;Pod'yalovskii, D. I.;Matviyenko, A. I.;Tovstolytkin, A. I.;Zakharenko, M. I.;Semen'ko, M. P.;
7:3:102:5     Detection of structural and magnetic transitions in La0.67Ba0.23Ca0.1MnO3 using the rf resonance technique
DOI:10.1016/j.jmmm.2010.04.021  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:1  AU: Naik, V. B.;Lam, M. C.;Mahendiran, R.;
7:3:103:1     Controlling the Percolation Threshold of Conductor-Insulator Composites by Changing the Granular Size of Insulators
DOI:10.2320/matertrans.M2010019  JN:MATERIALS TRANSACTIONS  PY:2010
  TC:4  AU: Shida, Kazuhito;Sahara, Ryoji;Tripathi, M. N.;Mizuseki, Hiroshi;Kawazoe, Yoshiyuki;
7:3:103:2     Controlling the Percolation Threshold of Conductor-Insulator Composites in a 2D Triangular Lattice by Introducing Binary Size Distributions of Conductor Particles
DOI:10.2320/matertrans.M2012029  JN:MATERIALS TRANSACTIONS  PY:2012
  TC:2  AU: Shida, Kazuhito;Sahara, Ryoji;Mizuseki, Hiroshi;Kawazoe, Yoshiyuki;
7:3:103:3     Controlling 3D Percolation Threshold of Conductor-Insulator Composites by Changing the Granular Size of Insulators
DOI:10.2320/matertrans.M2012227  JN:MATERIALS TRANSACTIONS  PY:2013
  TC:1  AU: Shida, Kazuhito;Sahara, Ryoji;Mizuseki, Hiroshi;Kawazoe, Yoshiyuki;
7:3:103:4     Conductivity Percolation on a Square Lattice with Core-Shell Particles
DOI:10.2320/matertrans.M2009329  JN:MATERIALS TRANSACTIONS  PY:2010
  TC:3  AU: Shida, Kazuhito;Sahara, Ryoji;Tripathi, M. N.;Mizuseki, Hiroshi;Kawazoe, Yoshiyuki;
7:3:103:5     Controlling 3D Percolation Threshold of Conductor-Insulator Composites by Changing the Granular Size of Conductors
DOI:10.2320/matertrans.M2011176  JN:MATERIALS TRANSACTIONS  PY:2011
  TC:1  AU: Shida, Kazuhito;Sahara, Ryoji;Mizuseki, Hiroshi;Kawazoe, Yoshiyuki;
7:3:103:6     Conductivity Percolation on a Cubic Lattice with Core-Shell Particles
DOI:10.2320/matertrans.M2010412  JN:MATERIALS TRANSACTIONS  PY:2011
  TC:0  AU: Shida, Kazuhito;Sahara, Ryoji;Tripathi, M. N.;Mizuseki, Hiroshi;Kawazoe, Yoshiyuki;
7:3:103:7     Conductivity Percolation on a Cubic Lattice with Two Different Sizes of Particles
DOI:10.2320/matertrans.M2010310  JN:MATERIALS TRANSACTIONS  PY:2011
  TC:1  AU: Shida, Kazuhito;Sahara, Ryoji;Tripathi, M. N.;Mizuseki, Hiroshi;Kawazoe, Yoshiyuki;
7:3:104:1     Crystal Structure and Microwave Dielectric Properties of LaLuO3 Ceramics
DOI:10.1111/j.1551-2916.2010.03930.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Varghese, Jobin;Joseph, Tony;Sebastian, Mailadil Thomas;Reeves-McLaren, Nik;Feteira, Antonio;
7:3:104:2     Growth-mode induced defects in epitaxial SrTiO3 thin films grown on single crystal LaAlO3 by a two-step PLD process
DOI:10.1557/jmr.2010.82  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:7  AU: Su, Dong;Yamada, Tomoaki;Gysel, Roman;Tagantsev, Alexander K.;Muralt, Paul;Setter, Nava;Jiang, Nan;
7:3:104:3     Electrical properties of BaTiO3 based ferroelectric capacitors grown on oxide sacrificial layers for micro-cantilevers applications
DOI:10.1016/j.tsf.2011.11.032  JN:THIN SOLID FILMS  PY:2012
  TC:5  AU: Vasta, Giuseppe;Jackson, Timothy J.;Tarte, Edward;
7:3:104:4     Thin film LaYbO3 capacitive structures grown by pulsed laser deposition
DOI:10.1016/j.tsf.2012.12.006  JN:THIN SOLID FILMS  PY:2013
  TC:0  AU: Vasta, Giuseppe;Feteira, Antonio;Woodward, David I.;Walker, David;Thomas, Pam A.;Jackson, Timothy J.;
7:3:104:5     Synthesis, characterization, and dielectric properties of low loss LaBO3 ceramics
DOI:10.1016/j.jeurceramsoc.2013.07.005  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Chen, Xingyu;Bai, Shuxin;Li, Ming;Zhang, Weijun;
7:3:104:6     Electrical properties of BaTiO3 based ferroelectric capacitors grown on oxide sacrificial layers for micro-cantilevers applications (vol 520, pg 3071, 2012)
DOI:10.1016/j.tsf.2012.02.007  JN:THIN SOLID FILMS  PY:2012
  TC:0  AU: Vasta, Giuseppe;Jackson, Timothy J.;Tarte, Edward;
7:3:105:1     On-line phase transitions of bulk and nanocrystalline La1-xPbxMnO3 (x=0.3, 0.4, and 0.5) perovskite manganite materials using ultrasonic measurements
DOI:10.1016/j.matchemphys.2012.12.023  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:0  AU: Sakthipandi, K.;Rajendran, V.;
7:3:105:2     Band alignment at Cu2O/La0.7Sr0.3MnO3 interface: A combined experimental-theoretical determination
DOI:10.1063/1.3467206  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Cantoni, M.;Petti, D.;Bertacco, R.;Pallecchi, I.;Marre, D.;Colizzi, G.;Filippetti, A.;Fiorentini, V.;
7:3:105:3     Cu2O as a nonmagnetic semiconductor for spin transport in crystalline oxide electronics
DOI:10.1103/PhysRevB.81.165311  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Pallecchi, I.;Pellegrino, L.;Banerjee, N.;Cantoni, M.;Gadaleta, A.;Siri, A. S.;Marre, D.;
7:3:105:4     Magneto-optical Kerr-effect studies on copper oxide thin films produced by atomic layer deposition on SiO2
DOI:10.1016/j.tsf.2011.10.204  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Fronk, Michael;Mueller, Steve;Waechtler, Thomas;Schulz, Stefan E.;Mothes, Robert;Lang, Heinrich;Zahn, Dietrich R. T.;Salvan, Georgeta;
7:3:106:1     Mott p-n junctions in layered materials
DOI:10.1103/PhysRevB.87.035137  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Charlebois, M.;Hassan, S. R.;Karan, R.;Senechal, D.;Tremblay, A. -M. S.;
7:3:106:2     Anomalous enhancement of the superconducting transition temperature of electron-doped La2-xCexCuO4 and Pr2-xCexCuO4 cuprate heterostructures
DOI:10.1103/PhysRevB.83.060511  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Jin, K.;Bach, P.;Zhang, X. H.;Grupel, U.;Zohar, E.;Diamant, I.;Dagan, Y.;Smadici, S.;Abbamonte, P.;Greene, R. L.;
7:3:106:3     Superconducting junctions from doped nonsuperconducting CuO2 layers
DOI:10.1103/PhysRevB.83.132505  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Loktev, V. M.;Pogorelov, Yu. G.;
7:3:107:1     Magnetoresistance in epitaxial thin films of La0.85Ag0.15MnO3 produced by polymer assisted deposition
DOI:10.1063/1.3629993  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Cobas, R.;Munoz-Perez, S.;Cadogan, J. M.;Puig, T.;Obradors, X.;
7:3:107:2     Misfit relaxation of La0.7Sr0.3MnO3 thin films by a nanodot segregation mechanism
DOI:10.1063/1.3549182  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Abellan, P.;Moreno, C.;Sandiumenge, F.;Obradors, X.;Casanove, M-J.;
7:3:107:3     A-site disorder effects in electron-doped manganite La0.4Ca0.6MnO3
DOI:10.1007/s00339-010-6019-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:4  AU: Hu, N.;Lu, C. L.;Wang, K. F.;Cheng, L.;Liu, Y.;Liu, J-M.;Xiong, R.;Shi, J.;
7:3:107:4     Dynamical transport behavior in electron-doped manganites La0.4Ca0.6(Mn1-x Ru (x) )O-3
DOI:10.1007/s00339-010-5844-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:1  AU: Lu, C. L.;Hu, N.;Wang, K. F.;Yan, Z. B.;Liu, J. -M.;
7:3:108:1     Study of magnetization reversal processes in a thin Co film
DOI:10.1016/j.jmmm.2013.02.009  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:7  AU: Chowdhury, N.;Bedanta, S.;Babu, G. S.;
7:3:108:2     High magnetic field induced pillar growth and subsequent magnetic properties of the thermal evaporated Co thin films
DOI:10.1016/j.matlet.2014.06.162  JN:MATERIALS LETTERS  PY:2014
  TC:8  AU: Li, Guojian;Du, Jiaojiao;Wang, Huimin;Wang, Qiang;Ma, Yonghui;He, Jicheng;
7:3:108:3     Anomalous magnetic field effects during pulsed injection metal-organic chemical vapor deposition of magnetite films
DOI:10.1063/1.3418622  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Zukova, Anna;Teiserskis, Arunas;Gun'ko, Y. K.;Sanchez, Ana M.;van Dijken, Sebastiaan;
7:3:108:4     Structural and morphological modifications of the Co-thin films caused by magnetic field and pH variation
DOI:10.1016/j.apsusc.2012.05.074  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:5  AU: Franczak, Agnieszka;Levesque, Alexandra;Bohr, Frederic;Douglade, Jacques;Chopart, Jean-Paul;
7:3:109:1     Coexistence of superparamagnetism and ferromagnetism in Co-doped ZnO nanocrystalline films
DOI:10.1016/j.scriptamat.2013.08.007  JN:SCRIPTA MATERIALIA  PY:2013
  TC:4  AU: Li, Qiang;Wang, Yuyin;Fan, Lele;Liu, Jiandang;Kong, Wei;Ye, Bangjiao;
7:3:109:2     Structure and magnetic properties of three-dimensional (La, Sr)MnO3 nanofilms on ZnO nanorod arrays
DOI:10.1063/1.3567544  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Gao, Haiyong;Staruch, M.;Jain, Menka;Gao, Pu-Xian;Shimpi, Paresh;Guo, Yanbing;Cai, Wenjie;Lin, Hui-jan;
7:3:109:3     Defect-induced ferromagnetism on pulsed laser ablated Zn0.95Co0.05O diluted magnetic semiconducting thin films
DOI:10.1063/1.3610447  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Liu, Q.;Yuan, C. L.;Gan, C. L.;Han, Guchang;
7:3:110:1     Numerical ellipsometry: High accuracy modeling of thin absorbing films in the n-k plane
DOI:10.1016/j.tsf.2014.03.067  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Urban, F. K., III;Barton, D.;
7:3:110:2     Numerical ellipsometry: Analysis of thin metal layers using n-k-d twisted curve methods with multiple incidence angles
DOI:10.1116/1.3439679  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2010
  TC:5  AU: Urban, F. K., III;Barton, D.;Tiwald, T.;
7:3:110:3     Numerical ellipsometry: n-k plane analysis of transparent conducting films
DOI:10.1116/1.3589803  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2011
  TC:1  AU: Barton, D.;Urban, F. K., III;
7:3:110:4     Numerical ellipsometry: Advanced analysis of thin absorbing films in the n-k plane
DOI:10.1016/j.tsf.2011.03.133  JN:THIN SOLID FILMS  PY:2011
  TC:2  AU: Urban, F. K., III;Barton, D.;
7:3:111:1     Preparation and investigation of the A-site and B-site terminated SrTiO3(001) surface: A combined experimental and theoretical x-ray photoelectron diffraction study
DOI:10.1063/1.4757283  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Raisch, C.;Chasse, T.;Langheinrich, Ch;Chasse, A.;
7:3:111:2     Ferroelectricity in a quasiamorphous ultrathin BaTiO3 film
DOI:10.1103/PhysRevB.84.205426  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Wang, J. L.;Pancotti, A.;Jegou, P.;Niu, G.;Gautier, B.;Mi, Y. Y.;Tortech, L.;Yin, S.;Vilquin, B.;Barrett, N.;
7:3:111:3     X-ray photoelectron diffraction study of dopant effects in La0.7X0.3MnO3 (X = La, Sr, Ca, Ce) thin films
DOI:10.1063/1.4789988  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Raisch, C.;Langheinrich, C.;Werner, R.;Kleiner, R.;Koelle, D.;Glaser, M.;Chasse, T.;Chasse, A.;
7:3:112:1     Observation of large magnetodielectric and direct magnetoelectric behavior in LCMO/PVDF 0-3 nanocomposites (Retracted article. See vol. 105, 239901, 2014)
DOI:10.1063/1.4793307  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Bhadra, Debabrata;Masud, Md. G.;De, S. K.;Chaudhuri, B. K.;
7:3:112:2     Observation of large magnetodielectric and direct magnetoelectric behavior in LCMO/PVDF 0-3 nanocomposites (Retraction of vol 102, 072902, 2013)
DOI:10.1063/1.4902333  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Bhadra, Debabrata;Masud, Md. G.;De, S. K.;Chaudhuri, B. K.;
7:3:113:1     Ultimate photovoltage in perovskite oxide heterostructures with critical film thickness
DOI:10.1063/1.3586250  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Wang, Cong;Jin, Kui-juan;Zhao, Rui-qiang;Lu, Hui-bin;Guo, Hai-zhong;Ge, Chen;He, Meng;Wang, Can;Yang, Guo-zhen;
7:3:113:2     A theoretical study on the dynamic process of the lateral photovoltage in perovskite oxide heterostructures
DOI:10.1063/1.3313943  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Liao, Leng;Jin, Kui-juan;Ge, Chen;Hu, Chun-lian;Lu, Hui-bin;Yang, Guo-zhen;
7:3:113:3     A case study on the scaling of 1/f noise: La2/3Sr1/3MnO3 Thin films
DOI:10.1063/1.4794202  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Kazakov, Kirill A.;
7:3:113:4     Comment on "A case study on the scaling of 1/f noise: La2/3Sr1/3MnO3 thin films" [J. Appl. Phys. 113, 094901 (2013)]
DOI:10.1063/1.4868864  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Barone, C.;Pagano, S.;Mechin, L.;Guillet, B.;Routoure, J. -M.;
7:3:113:5     Improved lateral photovoltaic effect of Ti and carbon films by interface modification with single-walled carbon nanotubes
DOI:10.1063/1.4862398  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Lu, Jing;Wang, Hui;
7:3:114:1     Structural and electrical properties of LaNiO3 thin films grown on (100) and (001) oriented SrLaAlO4 substrates by chemical solution deposition method
DOI:10.1016/j.ceramint.2013.03.072  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Pontes, D. S. L.;Pontes, F. M.;Pereira-da-Silva, Marcelo A.;Berenkue, O. M.;Chiquito, A. J.;Longo, E.;
7:3:114:2     Microstructural and magnetotransport properties of La1-xCaxMnO3 (0.45 <= x <= 0.60) thin films
DOI:10.1016/j.jallcom.2012.03.111  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Kumar, Pawan;Prasad, R.;Srivastava, A. K.;Vijayan, N.;Dwivedi, R. K.;Singh, H. K.;
7:3:114:3     Strain induced phase separation on La0.5Ca0.5MnO3 thin films
DOI:10.1016/j.jmmm.2010.10.030  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:4  AU: Antonakos, A.;Liarokapis, E.;Aydogdu, G. H.;Habermeier, H. -U.;
7:3:114:4     Pulsed laser deposition of highly textured La5Ca9Cu24O41 films on SrLaAlO4 (100) and Gd3Ga5O12 (100) substrates
DOI:10.1016/j.apsusc.2012.02.145  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:2  AU: Pervolaraki, M.;Pasuk, I.;Stan, G. E.;Giapintzakis, J.;
7:3:115:1     Neutron powder diffraction and magnetic studies of mesoporous Co3O4
DOI:10.1016/j.jmmm.2010.09.006  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:7  AU: Hill, Adrian H.;Harrison, Andrew;Ritter, Clemens;Yue, Wenbo;Zhou, Wuzong;
7:3:115:2     Field-dependent low-field enhancement in effective paramagnetic moment with nanoscaled Co3O4
DOI:10.1063/1.3475249  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Chen, Weimeng;Chen, Chinping;Guo, Lin;
7:3:115:3     Magnetic properties of cobalt oxide nanoparticles synthesised by a continuous hydrothermal method
DOI:10.1016/j.jmmm.2013.07.064  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:4  AU: Moro, Fabrizio;Tang, Selina Vi Yu;Tuna, Floriana;Lester, Edward;
7:3:116:1     Growth and structural characterization of orthorhombic and tetragonal SrCuO2 thin films
DOI:10.1016/j.apsusc.2012.12.029  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:1  AU: Mihailescu, C. N.;Pasuk, I.;Athanasopoulos, G. I.;Luculescu, C.;Socol, M.;Saint-Martin, R.;Revcolevschi, A.;Giapintzakis, J.;
7:3:116:2     Origin of the stabilization of the metastable tetragonal high-pressure phase in SrCuO2 thin films grown on SrTiO3 substrates by pulsed laser deposition
DOI:10.1016/j.apsusc.2014.09.116  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Mihailescu, C. N.;Pasuk, I.;Straticiuc, M.;Nita, C. R.;Pantelica, D.;Giapintzakis, J.;
7:3:116:3     Structural properties of epitaxial SrCuO2 thin films on SrTiO3 (001) substrates
DOI:10.1016/j.tsf.2010.10.047  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Mi, Shao-Bo;
7:3:117:1     Low thermal conductivity of CsBiNb2O7 epitaxial layers
DOI:10.1063/1.3368120  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Cahill, David G.;Melville, Alexander;Schlom, Darrell G.;Zurbuchen, Mark A.;
7:3:117:2     Determination of the thermal conductivity tensor of the n=7 Aurivillius phase Sr4Bi4Ti7O24
DOI:10.1063/1.4733616  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Zurbuchen, M. A.;Cahill, D. G.;Schubert, J.;Jia, Y.;Schlom, D. G.;
7:3:118:1     Interplay between magnetic impurities and photoinduced carriers in surface depletion layer of anatase Ti1-xCoxO2-delta thin film probed by x-ray photoemission spectroscopy
DOI:10.1063/1.3291680  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Yamashita, N.;Sudayama, T.;Mizokawa, T.;Yamada, Y.;Fukumura, T.;Kawasaki, M.;
7:3:118:2     Valence instability and photochemical reaction at surface of strongly correlated MgTi2O4
DOI:10.1063/1.4818355  JN:APL MATERIALS  PY:2013
  TC:1  AU: Fujiwara, H.;Ishige, Y.;Mizokawa, T.;Sasaki, T.;Isobe, M.;Ueda, Y.;
7:3:118:3     Nondestructive estimation of depletion layer profile in Nb-doped SrTiO3/(La,Ba)MnO3 heterojunction diode structure by hard x-ray photoemission spectroscopy
DOI:10.1063/1.3571454  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Tanaka, Hidekazu;Satoh, Issei;Kanki, Teruo;Ikenaga, Eiji;Kobata, Masaaki;Kim, Jung Jin;Ueda, Shigenori;Kobayashi, Keisuke;
7:3:119:1     Polaron absorption for photovoltaic energy conversion in a manganite-titanate pn heterojunction
DOI:10.1103/PhysRevB.85.165315  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Saucke, Gesine;Norpoth, Jonas;Jooss, Christian;Su, Dong;Zhu, Yimei;
7:3:119:2     Evidence of mobile carriers with charge-ordering gap in epitaxial Pr0.625Ca0.375MnO3 thin films
DOI:10.1103/PhysRevB.81.155120  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Singh, Udai Raj;Chaudhuri, S.;Dutta, Anirban;Budhani, R. C.;Gupta, Anjan K.;
7:3:119:3     Polaron absorption for photovoltaic energy conversion in a manganite-titanate pn heterojunction (vol 85, 165315, 2012)
DOI:10.1103/PhysRevB.87.119908  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Saucke, Gesine;Norpoth, Jonas;Jooss, Christian;Su, Dong;Zhu, Yimei;
7:3:119:4     Wet chemical deposition of single crystalline epitaxial manganite thin films with atomically flat surface
DOI:10.1016/j.tsf.2013.01.107  JN:THIN SOLID FILMS  PY:2013
  TC:0  AU: Mishra, Amita;Dutta, Anirban;Samaddar, Sayanti;Gupta, Anjan K.;
7:3:120:1     Effects of Nb doping level on the electronic transport, photoelectric effect and magnetoresistance across La0.5Ca0.5MnO3/Nb:SrTiO3 junctions
DOI:10.1063/1.4851076  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Wang, J. F.;Jiang, Y. C.;Chen, M. G.;Gao, J.;
7:3:120:2     Photoelectric effects and magnetic responses in highly rectifying Nd0.7Sr0.3MnO3/Nb-SrTiO3 heterojunctions
DOI:10.1063/1.3540675  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Wang, J. F.;Gao, J.;
7:3:120:3     Influences of leakage currents on the transport properties and photoelectric effects in heterojunctions composed of colossal magnetoresistance manganites and Nb-doped titanates
DOI:10.1063/1.3679413  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Wang, J. F.;Wu, Z. P.;Gao, J.;
7:3:121:1     Transport and spectroscopic properties of superconductor/ferromagnet/superconductor junctions of La1.9Sr0.1CuO4/La0.67Ca0.33MnO3/La1.9Sr0.1CuO4
DOI:10.1103/PhysRevB.84.134517  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Koren, G.;Kirzhner, T.;
7:3:121:2     Interface effects in d-wave superconductor-ferromagnet junctions in the vicinity of domain walls
DOI:10.1103/PhysRevB.82.134507  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Kirzhner, T.;Koren, G.;
7:3:121:3     Observation of Two Andreev-Like Energy Scales in La2-xSrxCuO4 Superconductor-Normal-Metal-Superconductor Junctions
DOI:10.1103/PhysRevLett.106.017002  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:3  AU: Koren, G.;Kirzhner, T.;
7:3:122:1     Structural-modulation-driven low-temperature glassy behavior in SrRuO3
DOI:10.1103/PhysRevB.85.224426  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Sow, Chanchal;Samal, D.;Kumar, P. S. Anil;Bera, A. K.;Yusuf, S. M.;
7:3:122:2     Probing a spin-glass state in SrRuO3 thin films through higher-order statistics of resistance fluctuations
DOI:10.1103/PhysRevB.90.115153  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Daptary, Gopi Nath;Sow, Chanchal;Kumar, P. S. Anil;Bid, Aveek;
7:3:122:3     Freezing of the octahedral tilt near ferromagnetic transition and appearance of a glassy phase at low temperature driven by the tilt instabilities in SrRuO3
DOI:10.1063/1.4795125  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Sow, Chanchal;Samal, D.;Kumar, P. S. Anil;Bera, A. K.;Yusuf, S. M.;
7:3:123:1     Resistance switching effect in LaAlO3/Nb-doped SrTiO3 heterostructure
DOI:10.1007/s00339-011-6276-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:10  AU: Tian, H. F.;Zhao, Y. G.;Jiang, X. L.;Shi, J. P.;Zhang, H. J.;Sun, J. R.;
7:3:123:2     Rectifying and photovoltage characteristics of Bi2Sr2Co2Oy/Nb-doped SrTiO3 heterojunction
DOI:10.1007/s00339-011-6551-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:1  AU: Wang, Shufang;Li, Huiling;Zhao, Kun;Zhao, Songqing;Chen, Mingjing;Chen, Jingchun;Wang, Jianglong;Fu, Guangsheng;
7:3:124:1     Frequency dependent electrical characteristics of BiFeO3 MOS capacitors
DOI:10.1016/j.jallcom.2013.08.204  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:10  AU: Kaya, Senol;Lok, Ramazan;Aktag, Aliekber;Seidel, Jan;Yilmaz, Ercan;
7:3:124:2     Frequency and voltage dependency of interface states and series resistance in Al/SiO2/p-Si MOS structure
DOI:10.1016/j.mssp.2011.05.009  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2010
  TC:11  AU: Xiao, Hong;Huang, Shihua;
7:3:124:3     Electrical characterization of ethanol sensing device based on Vanadium oxide/Porous Si/Si structure
DOI:10.1016/j.ssi.2013.09.055  JN:SOLID STATE IONICS  PY:2013
  TC:3  AU: Chebout, K.;Iratni, A.;Bouremana, A.;Sam, S.;Keffous, A.;Gabouze, N.;
7:3:125:1     Two-Dimensional Superconducting State of Monolayer Pb Films Grown on GaAs(110) in a Strong Parallel Magnetic Field
DOI:10.1103/PhysRevLett.111.057005  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Sekihara, Takayuki;Masutomi, Ryuichi;Okamoto, Tohru;
7:3:125:2     Magnetotransport in adsorbate-induced two-dimensional electron systems on cleaved InAs surfaces
DOI:10.1063/1.3578263  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Okamoto, Tohru;Mochizuki, Toshimitsu;Minowa, Masaaki;Komatsuzaki, Kazunari;Masutomi, Ryuichi;
7:3:126:1     Magnesium metallic interlayer as an oxygen-diffusion-barrier between high-kappa dielectric thin films and silicon substrate
DOI:10.1016/j.tsf.2012.04.029  JN:THIN SOLID FILMS  PY:2012
  TC:0  AU: Rauwel, E.;Rauwel, P.;Ducroquet, F.;Sunding, M. F.;Matko, I.;Lourenco, A. C.;
7:3:126:2     Metallic oxygen barrier diffusion applied to high-kappa deposition
DOI:10.1116/1.3534019  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:1  AU: Rauwei, E.;Rauwel, P.;Ducroquet, F.;Matko, I.;Lourenco, A. C.;
7:3:127:1     Josephson effect in CeCoIn5 microbridges as seen via quantum interferometry
DOI:10.1103/PhysRevB.84.045103  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Foyevtsov, Oleksandr;Porrati, Fabrizio;Huth, Michael;
7:3:127:2     Transport measurements on microcrystals of oriented CeIn3 and CeCoIn5 thin films
DOI:10.1016/j.tsf.2010.06.028  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Foyevtsov, O.;Reith, H.;Huth, M.;
7:3:128:1     Epitaxial PbxZr1-xTiO3 on GaN
DOI:10.1063/1.4792599  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Paisley, E. A.;Craft, H. S.;Losego, M. D.;Lu, H.;Gruverman, A.;Collazo, R.;Sitar, Z.;Maria, J. -P.;
7:3:128:2     Epitaxial lead zirconate titanate on gallium nitride (vol 113, 074107, 2013)
DOI:10.1063/1.4842135  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Paisley, E. A.;Craft, H. S.;Losego, M. D.;Lu, H.;Gruverman, A.;Collazo, R.;Sitar, Z.;Maria, J. -P.;
7:4:1:1     Recent Progress in Multiferroic Magnetoelectric Composites: from Bulk to Thin Films
DOI:10.1002/adma.201003636  JN:ADVANCED MATERIALS  PY:2011
  TC:511  AU: Ma, Jing;Hu, Jiamian;Li, Zheng;Nan, Ce-Wen;
7:4:1:2     Magnetoelectric Coupling Effects in Multiferroic Complex Oxide Composite Structures
DOI:10.1002/adma.200904326  JN:ADVANCED MATERIALS  PY:2010
  TC:261  AU: Vaz, Carlos A. F.;Hoffman, Jason;Ahn, Charles H.;Ramesh, Ramamoorthy;
7:4:1:3     Electric-Field-Induced Magnetization Reversal in a Ferromagnet-Multiferroic Heterostructure
DOI:10.1103/PhysRevLett.107.217202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:93  AU: Heron, J. T.;Trassin, M.;Ashraf, K.;Gajek, M.;He, Q.;Yang, S. Y.;Nikonov, D. E.;Chu, Y-H.;Salahuddin, S.;Ramesh, R.;
7:4:1:4     Giant electric-field-induced reversible and permanent magnetization reorientation on magnetoelectric Ni/(011) [Pb(Mg1/3Nb2/3)O-3]((1-x))-[PbTiO3](x) heterostructure
DOI:10.1063/1.3534788  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:63  AU: Wu, Tao;Bur, Alexandre;Zhao, Ping;Mohanchandra, Kotekar P.;Wong, Kin;Wang, Kang L.;Lynch, Christopher S.;Carman, Gregory P.;
7:4:1:5     Electric-Field Control of Nonvolatile Magnetization in Co40Fe40B20/Pb(Mg1/3Nb2/3)(0.7)Ti0.3O3 Structure at Room Temperature
DOI:10.1103/PhysRevLett.108.137203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:47  AU: Zhang, S.;Zhao, Y. G.;Li, P. S.;Yang, J. J.;Rizwan, S.;Zhang, J. X.;Seidel, J.;Qu, T. L.;Yang, Y. J.;Luo, Z. L.;He, Q.;Zou, T.;Chen, Q. P.;Wang, J. W.;Yang, L. F.;Sun, Y.;Wu, Y. Z.;Xiao, X.;Jin, X. F.;Huang, J.;Gao, C.;Han, X. F.;Ramesh, R.;
7:4:1:6     Design of a Voltage-Controlled Magnetic Random Access Memory Based on Anisotropic Magnetoresistance in a Single Magnetic Layer
DOI:10.1002/adma.201201004  JN:ADVANCED MATERIALS  PY:2012
  TC:38  AU: Hu, Jia-Mian;Li, Zheng;Chen, Long-Qing;Nan, Ce-Wen;
7:4:1:7     Electrical control of reversible and permanent magnetization reorientation for magnetoelectric memory devices
DOI:10.1063/1.3605571  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:44  AU: Wu, Tao;Bur, Alexandre;Wong, Kin;Zhao, Ping;Lynch, Christopher S.;Amiri, Pedram Khalili;Wang, Kang L.;Carman, Gregory P.;
7:4:1:8     Electric-field control of strain-mediated magnetoelectric random access memory
DOI:10.1063/1.3373593  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:41  AU: Hu, Jia-Mian;Li, Zheng;Wang, Jing;Nan, C. W.;
7:4:1:9     Voltage Tuning of Ferromagnetic Resonance with Bistable Magnetization Switching in Energy-Efficient Magnetoelectric Composites
DOI:10.1002/adma.201203792  JN:ADVANCED MATERIALS  PY:2013
  TC:42  AU: Liu, Ming;Zhou, Ziyao;Nan, Tianxiang;Howe, Brandon M.;Brown, Gail J.;Sun, Nian X.;
7:4:1:10     Electric field control of microwave characteristics in composition-graded FeCoTa film grown onto [Pb(Mg1/3Nb2/3)O-3](0.68)-[PbTiO3](0.32)(011) crystal
DOI:10.1063/1.4891048  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Phuoc, Nguyen N.;Ong, C. K.;
7:4:1:11     Electric field modulation of magnetoresistance in multiferroic heterostructures for ultralow power electronics
DOI:10.1063/1.3597796  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:34  AU: Liu, Ming;Li, Shandong;Obi, Ogheneyunume;Lou, Jing;Rand, Scott;Sun, Nian X.;
7:4:1:12     Thickness-dependent voltage-modulated magnetism in multiferroic heterostructures
DOI:10.1063/1.3675868  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:26  AU: Shu, Li;Li, Zheng;Ma, Jing;Gao, Ya;Gu, Lin;Shen, Yang;Lin, Yuanhua;Nan, C. W.;
7:4:1:13     Domain engineered switchable strain states in ferroelectric (011) [Pb(Mg1/3Nb2/3)O-3]((1-x))-[PbTiO3](x) (PMN-PT, x approximate to 0.32) single crystals
DOI:10.1063/1.3595670  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:38  AU: Wu, Tao;Zhao, Ping;Bao, Mingqiang;Bur, Alexandre;Hockel, Joshua L.;Wong, Kin;Mohanchandra, Kotekar P.;Lynch, Christopher S.;Carman, Gregory P.;
7:4:1:14     E-Field Control of Exchange Bias and Deterministic Magnetization Switching in AFM/FM/FE Multiferroic Heterostructures
DOI:10.1002/adfm.201002485  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:41  AU: Liu, Ming;Lou, Jing;Li, Shandong;Sun, Nian X.;
7:4:1:15     Size-dependent electric voltage controlled magnetic anisotropy in multiferroic heterostructures: Interface-charge and strain comediated magnetoelectric coupling
DOI:10.1103/PhysRevB.83.134408  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Hu, Jia-Mian;Nan, Ce-Wen;Chen, Long-Qing;
7:4:1:16     Electrical tuning of magnetism in Fe3O4/PZN-PT multiferroic heterostructures derived by reactive magnetron sputtering
DOI:10.1063/1.3354104  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:38  AU: Liu, Ming;Obi, Ogheneyunume;Cai, Zhuhua;Lou, Jing;Yang, Guomin;Ziemer, Katherine S.;Sun, Nian X.;
7:4:1:17     Electric field modulation of ultra-high resonance frequency in obliquely deposited [Pb(Mg1/3Nb2/3)O-3](0.68)-[PbTiO3](0.32)(011)/FeCoZr heterostructure for reconfigurable magnetoelectric microwave devices
DOI:10.1063/1.4890411  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Phuoc, Nguyen N.;Ong, C. K.;
7:4:1:18     Engineering domain structures in nanoscale magnetic thin films via strain
DOI:10.1063/1.4826491  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Hu, Jia-Mian;Yang, T. N.;Chen, L. Q.;Nan, C. W.;
7:4:1:19     Voltage-Impulse-Induced Non-Volatile Ferroelastic Switching of Ferromagnetic Resonance for Reconfigurable Magnetoelectric Microwave Devices
DOI:10.1002/adma.201301989  JN:ADVANCED MATERIALS  PY:2013
  TC:26  AU: Liu, Ming;Howe, Brandon M.;Grazulis, Lawrence;Mahalingam, Krishnamurthy;Nan, Tianxiang;Sun, Nian X.;Brown, Gail J.;
7:4:1:20     Thickness-dependent converse magnetoelectric coupling in bi-layered Ni/PZT thin films
DOI:10.1063/1.3682764  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:15  AU: Li, Zheng;Hu, Jiamian;Shu, Li;Gao, Ya;Shen, Yang;Lin, Yuanhua;Nan, C. W.;
7:4:1:21     Purely Electric-Field-Driven Perpendicular Magnetization Reversal
DOI:10.1021/nl504108m  JN:NANO LETTERS  PY:2015
  TC:5  AU: Hu, Jia-Mian;Yang, Tiannan;Wang, Jianjun;Huang, Houbing;Zhang, Jinxing;Chen, Long-Qing;Nan, Ce-Wen;
7:4:1:22     Nonvolatile, reversible electric-field controlled switching of remanent magnetization in multifunctional ferromagnetic/ferroelectric hybrids
DOI:10.1063/1.3624663  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:22  AU: Brandlmaier, A.;Gepraegs, S.;Woltersdorf, G.;Gross, R.;Goennenwein, S. T. B.;
7:4:1:23     Magnetization Reversal by Electric-Field Decoupling of Magnetic and Ferroelectric Domain Walls in Multiferroic-Based Heterostructures
DOI:10.1103/PhysRevLett.106.057206  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:39  AU: Skumryev, V.;Laukhin, V.;Fina, I.;Marti, X.;Sanchez, F.;Gospodinov, M.;Fontcuberta, J.;
7:4:1:24     Magnetoelectric manipulation of domain wall configuration in thin film Ni/[Pb(Mn1/3Nb2/3)O-3](0.68)-[PbTiO3](0.32) (001) heterostructure
DOI:10.1063/1.3690953  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:18  AU: Hsu, Chin-Jui;Hockel, Joshua L.;Carman, Gregory P.;
7:4:1:25     Large anisotropic remnant magnetization tunability in (011)-La2/3Sr1/3MnO3/0.7Pb(Mg2/3Nb1/3)O-3-0.3PbTiO(3) multiferroic epitaxial heterostructures
DOI:10.1063/1.3676044  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:15  AU: Yang, Yuanjun;Yang, Meng Meng;Luo, Z. L.;Huang, Haoliang;Wang, Haibo;Bao, J.;Hu, Chuansheng;Pan, Guoqiang;Yao, Yiping;Liu, Yukuai;Li, X. G.;Zhang, Sen;Zhao, Y. G.;Gao, C.;
7:4:1:26     Electric-poling-induced magnetic anisotropy and electric-field-induced magnetization reorientation in magnetoelectric Ni/(011) [Pb(Mg1/3Nb2/3)O-3]((1-x))-[PbTiO3](x) heterostructure
DOI:10.1063/1.3563040  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:20  AU: Wu, Tao;Bur, Alexandre;Wong, Kin;Hockel, Joshua Leon;Hsu, Chin-Jui;Kim, Hyungsuk K. D.;Wang, Kang L.;Carman, Gregory P.;
7:4:1:27     Voltage-driven perpendicular magnetic domain switching in multiferroic nanoislands
DOI:10.1063/1.4804157  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Hu, Jia-Mian;Yang, T. N.;Chen, L. Q.;Nan, C. W.;
7:4:1:28     Switchable voltage control of the magnetic coercive field via magnetoelectric effect
DOI:10.1063/1.3626748  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Wang, Jing;Ma, Jing;Li, Zheng;Shen, Yang;Lin, Yuanhua;Nan, C. W.;
7:4:1:29     Micro-strip ferromagnetic resonance study of strain-induced anisotropy in amorphous FeCuNbSiB film on flexible substrate
DOI:10.1063/1.4896170  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Zighem, Fatih;El Bahoui, Anouar;Moulin, Johan;Faurie, Damien;Belmeguenai, Mohamed;Mercone, Silvana;Haddadi, Halim;
7:4:1:30     Converse magnetoelectric coupling in NiFe/Pb(Mg1/3Nb2/3)O-3-PbTiO3 nanocomposite thin films grown on Si substrates
DOI:10.1063/1.4828878  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Feng, Ming;Hu, Jiamian;Wang, Jianjun;Li, Zheng;Shu, Li;Nan, C. W.;
7:4:1:31     Electrostatic tuning of ferromagnetic resonance and magnetoelectric interactions in ferrite-piezoelectric heterostructures grown by chemical vapor deposition
DOI:10.1063/1.3658900  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:19  AU: Li, Ning;Liu, Ming;Zhou, Ziyao;Sun, Nian X.;Murthy, D. V. B.;Srinivasan, Gopalan;Klein, Tonya M.;Petrov, Vladimir. M.;Gupta, Arunava;
7:4:1:32     Quantifying thickness-dependent charge mediated magnetoelectric coupling in magnetic/dielectric thin film heterostructures
DOI:10.1063/1.4839276  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Zhou, Z.;Nan, T. X.;Gao, Y.;Yang, X.;Beguhn, S.;Li, M.;Lu, Y.;Wang, J. L.;Liu, M.;Mahalingam, K.;Howe, B. M.;Brown, G. J.;Sun, N. X.;
7:4:1:33     Electric field controlled reversible magnetic anisotropy switching studied by spin rectification
DOI:10.1063/1.4867881  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Zhou, Hengan;Fan, Xiaolong;Wang, Fenglong;Jiang, Changjun;Rao, Jinwei;Zhao, Xiaobing;Gui, Y. S.;Hu, C. -M.;Xue, Desheng;
7:4:1:34     A simple method for direct observation of the converse magnetoelectric effect in magnetic/ferroelectric composite thin films
DOI:10.1063/1.3660694  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Li, Zheng;Hu, Jiamian;Shu, Li;Zhang, Yi;Gao, Ya;Shen, Yang;Lin, Yuanhua;Nan, C. W.;
7:4:1:35     Voltage-controlled ferromagnetism and magnetoresistance in LaCoO3/SrTiO3 heterostructures
DOI:10.1063/1.4831673  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Hu, Chengqing;Park, Keun Woo;Posadas, Agham;Jordan-Sweet, Jean L.;Demkov, Alexander A.;Yu, Edward T.;
7:4:1:36     Non-Volatile 180 degrees Magnetization Reversal by an Electric Field in Multiferroic Heterostructures
DOI:10.1002/adma.201402774  JN:ADVANCED MATERIALS  PY:2014
  TC:3  AU: Yang, Sheng-Wei;Peng, Ren-Ci;Jiang, Tao;Liu, Yu-Kuai;Feng, Lei;Wang, Jian-Jun;Chen, Long-Qing;Li, Xiao-Guang;Nan, Ce-Wen;
7:4:1:37     Voltage impulse induced bistable magnetization switching in multiferroic heterostructures
DOI:10.1063/1.3698363  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:23  AU: Nan, T. X.;Zhou, Z. Y.;Lou, J.;Liu, M.;Yang, X.;Gao, Y.;Rand, S.;Sun, N. X.;
7:4:1:38     Strain-domain structure and stability diagrams for single-domain magnetic thin films
DOI:10.1063/1.4824165  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Wang, J. J.;Hu, Jia-Mian;Chen, Long-Qing;Nan, Ce-Wen;
7:4:1:39     Strain-mediated voltage control of magnetism in multiferroic Ni77Fe23/Pb(Mg1/3Nb2/3)(0.7)Ti0.3O3 heterostructure
DOI:10.1063/1.4870975  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Gao, Ya;Hu, Jiamian;Shu, Li;Nan, C. W.;
7:4:1:40     Phase-field simulation of electric-field-induced in-plane magnetic domain switching in magnetic/ferroelectric layered heterostructures
DOI:10.1063/1.3600203  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Hu, Jia-Mian;Sheng, G.;Zhang, J. X.;Nan, C. W.;Chen, L. Q.;
7:4:1:41     Anomalous thickness-dependent strain states and strain-tunable magnetization in Zn-doped ferrite epitaxial films
DOI:10.1063/1.4874920  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yang, Y. J.;Yang, M. M.;Luo, Z. L.;Hu, C. S.;Bao, J.;Huang, H. L.;Zhang, S.;Wang, J. W.;Li, P. S.;Liu, Y.;Zhao, Y. G.;Chen, X. C.;Pan, G. Q.;Jiang, T.;Liu, Y. K.;Li, X. G.;Gao, C.;
7:4:1:42     Single Domain Spin Manipulation by Electric Fields in Strain Coupled Artificial Multiferroic Nanostructures
DOI:10.1103/PhysRevLett.111.027204  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:13  AU: Buzzi, M.;Chopdekar, R. V.;Hockel, J. L.;Bur, A.;Wu, T.;Pilet, N.;Warnicke, P.;Carman, G. P.;Heyderman, L. J.;Nolting, F.;
7:4:1:43     Precision electric control of magnetic domain wall motions in a multiferroic bilayer based on strain-mediated magnetoelectric coupling
DOI:10.1016/j.materresbull.2014.06.023  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Chen, H. T.;Soh, A. K.;
7:4:1:44     A magnetoelectric memory cell with coercivity state as writing data bit
DOI:10.1063/1.3405722  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:22  AU: Li, Zheng;Wang, Jing;Lin, Yuanhua;Nan, C. W.;
7:4:1:45     A simple bilayered magnetoelectric random access memory cell based on electric-field controllable domain structure
DOI:10.1063/1.3463408  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:20  AU: Hu, Jia-Mian;Li, Zheng;Wang, Jing;Ma, Jing;Lin, Y. H.;Nan, C. W.;
7:4:1:46     Magnetization reversal assisted by the inverse piezoelectric effect in Co-Fe-B/ferroelectric multilayers
DOI:10.1103/PhysRevB.84.012404  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Lei, Na;Park, Sanghwan;Lecoeur, Philippe;Ravelosona, Dafine;Chappert, Claude;Stelmakhovych, Olha;Holy, Vaclav;
7:4:1:47     Phase-field simulation of strain-induced domain switching in magnetic thin films
DOI:10.1063/1.3567542  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: Hu, Jia-Mian;Sheng, G.;Zhang, J. X.;Nan, C. W.;Chen, L. Q.;
7:4:1:48     Nonvolatile electric-field modulation of magnetic anisotropy in perpendicularly magnetized L1(0)-FePt/(001)[Pb(Mg1/3Nb2/3)](0.7)-(PbTiO3)(0.3) heterostructures
DOI:10.1063/1.4850575  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Tsai, Wu-Chang;Liao, Sheng-Chieh;Huang, Kuo-Feng;Wang, Ding-Shuo;Lai, Chih-Huang;
7:4:1:49     Optimization of indirect magnetoelectric effect in thin-film/substrate/piezoelectric-actuator heterostructure using polymer substrate
DOI:10.1063/1.4892579  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Gueye, Mouhamadou;Zighem, Fatih;Faurie, Damien;Belmeguenai, Mohamed;Mercone, Silvana;
7:4:1:50     Voltage-induced strain control of the magnetic anisotropy in a Ni thin film on flexible substrate
DOI:10.1063/1.4817645  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Zighem, F.;Faurie, D.;Mercone, S.;Belmeguenai, M.;Haddadi, H.;
7:4:1:51     Electric Field Manipulation of Magnetization Rotation and Tunneling Magnetoresistance of Magnetic Tunnel Junctions at Room Temperature
DOI:10.1002/adma.201400617  JN:ADVANCED MATERIALS  PY:2014
  TC:11  AU: Li, Peisen;Chen, Aitian;Li, Dalai;Zhao, Yonggang;Zhang, Sen;Yang, Lifeng;Liu, Yan;Zhu, Meihong;Zhang, Huiyun;Han, Xiufeng;
7:4:1:52     Electric field induced magnetization rotation in patterned Ni ring/Pb(Mg1/3Nb2/3)O-3]((120.32))-[PbTiO3](0.32) heterostructures
DOI:10.1063/1.3675458  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Hockel, Joshua L.;Bur, Alexandre;Wu, Tao;Wetzlar, Kyle P.;Carman, Gregory P.;
7:4:1:53     Piezoelectric control of magnetic dynamics in Co/Pb(Mg1/3Nb2/3)O-3-PbTiO3 heterostructure
DOI:10.1063/1.4893142  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wang, Fenglong;Zhou, Cai;Zhang, Chao;Dong, Chunhui;Yang, Chengcheng;Jiang, Changjun;Jia, Chenglong;Xue, Desheng;
7:4:1:54     Large converse magnetoelectric response in Rosen-type transformer and Terfenol-D laminated composite
DOI:10.1063/1.3684604  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Zhou, Jian-Ping;Wang, Pan;Yang, Jia;Liu, Peng;Zhang, Huai-Wu;
7:4:1:55     Large E-field tunability of microwave ferromagnetic properties in Fe59.3Co28.0Hf12.7/PZN-PT multiferroic composites
DOI:10.1063/1.4865315  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:6  AU: Li, Shandong;Du, Honglei;Xue, Qian;Gao, Xiaoyang;Zhang, Yongcheng;Shao, Weiquan;Nan, Tianxiang;Zhou, Ziyao;Sun, Nian X.;
7:4:1:56     Voltage-dependent ferromagnetic resonance in epitaxial multiferroic nanocomposites
DOI:10.1063/1.3319507  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Benatmane, Nadjib;Crane, S. P.;Zavaliche, F.;Ramesh, R.;Clinton, T. W.;
7:4:1:57     A method to control magnetism in individual strain-mediated magnetoelectric islands
DOI:10.1063/1.4838216  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Cui, Jizhai;Hockel, Joshua L.;Nordeen, Paul K.;Pisani, David M.;Liang, Cheng-yen;Carman, Gregory P.;Lynch, Christopher S.;
7:4:1:58     Non-volatile voltage control of magnetization and magnetic domain walls in magnetostrictive epitaxial thin films
DOI:10.1063/1.4745789  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:14  AU: Parkes, D. E.;Cavill, S. A.;Hindmarch, A. T.;Wadley, P.;McGee, F.;Staddon, C. R.;Edmonds, K. W.;Campion, R. P.;Gallagher, B. L.;Rushforth, A. W.;
7:4:1:59     Electrical control of magnetic reversal processes in magnetostrictive structures
DOI:10.1063/1.4789396  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Cavill, S. A.;Parkes, D. E.;Miguel, J.;Dhesi, S. S.;Edmonds, K. W.;Campion, R. P.;Rushforth, A. W.;
7:4:1:60     Local control of magnetic anisotropy in transcritical permalloy thin films using ferroelectric BaTiO3 domains
DOI:10.1063/1.4902809  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Fackler, Sean W.;Donahue, Michael J.;Gao, Tieren;Nero, Paris N. A.;Cheong, Sang-Wook;Cumings, John;Takeuchi, Ichiro;
7:4:1:61     Piezoelectric control of magnetic anisotropy in the Ni0.46Zn0.54Fe2O4/Pb(Mg1/3Nb2/3)O-3-PbTiO3 composite
DOI:10.1063/1.4864757  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Dong, Chunhui;Guo, Dangwei;Wu, Lei;Wang, Fenglong;Jiang, Changjun;Jia, Chenglong;Xue, Desheng;
7:4:1:62     Voltage-driven hysteretic changes in magnetization in multiferroic Co/BTO composite thin films
DOI:10.1016/j.apsusc.2014.05.202  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Shu, Li;Hu, Jia-Mian;Gao, Yao;Wu, Liang;Ma, Jing;Lin, Y. H.;Nan, C. W.;
7:4:1:63     Evaluating the electro-optical effect in alternating current-voltage-modulated Kerr response for multiferroic heterostructures
DOI:10.1063/1.4833573  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Shu, Li;Gao, Ya;Hu, Jia-Mian;Li, Zheng;Shen, Yang;Lin, Yuanhua;Nan, C. W.;
7:4:1:64     "Long leg" magnetoelectric memory
DOI:10.1063/1.4883241  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Morosov, A. I.;Sigov, A. S.;
7:4:1:65     Control of magnetic and electric responses with electric and magnetic fields in magnetoelectric heterostructures
DOI:10.1063/1.3443715  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Das, J.;Li, M.;Kalarickal, S. S.;Altmannshofer, S.;Buchanan, K. S.;Li, J. F.;Viehland, D.;
7:4:1:66     Magneto-electric tuning of the phase of propagating spin waves
DOI:10.1063/1.4734499  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Bao, Mingqiang;Zhu, Guodong;Wong, Kin L.;Hockel, Joshua L.;Lewis, Mark;Zhao, Jing;Wu, Tao;Amiri, Pedram Khalili;Wang, Kang L.;
7:4:1:67     Strong non-volatile voltage control of magnetism in magnetic/antiferroelectric magnetoelectric heterostructures
DOI:10.1063/1.4861462  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhou, Z.;Zhang, X. Y.;Xie, T. F.;Nan, T. X.;Gao, Y.;Yang, X.;Wang, X. J.;He, X. Y.;Qiu, P. S.;Sun, N. X.;Sun, D. Z.;
7:4:1:68     Ultra-low power electrically reconfigurable magnetoelectric microwave devices
DOI:10.1063/1.4757597  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Wu, Tao;Carman, Gregory P.;
7:4:1:69     Effects of ferroelectric polarization switching on the electronic transport and magnetic properties of La0.8Ce0.2MnO3 epitaxial thin films
DOI:10.1063/1.4817080  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Zhu, Q. X.;Zheng, M.;Wang, W.;Yang, M. M.;Wang, Y.;Li, X. M.;Luo, H. S.;Chan, H. L. W.;Li, X. G.;Zheng, R. K.;
7:4:1:70     Electric-field-induced spin wave generation using multiferroic magnetoelectric cells
DOI:10.1063/1.4865916  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Cherepov, Sergiy;Amiri, Pedram Khalili;Alzate, Juan G.;Wong, Kin;Lewis, Mark;Upadhyaya, Pramey;Nath, Jayshankar;Bao, Mingqiang;Bur, Alexandre;Wu, Tao;Carman, Gregory P.;Khitun, Alexander;Wang, Kang L.;
7:4:1:71     Electric-field modulation of magnetic properties of Fe films directly grown on BiScO3-PbTiO3 ceramics
DOI:10.1063/1.3369284  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Wang, Jing;Hu, Jiamian;Wang, Han;Jiang, He;Wu, Zhangben;Ma, Jing;Wang, Xiaohui;Lin, Yuanhua;Nan, C. W.;
7:4:1:72     In-plane anisotropic converse magnetoelectric coupling effect in FeGa/polyvinylidene fluoride heterostructure films
DOI:10.1063/1.4793780  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Zuo, Zhenghu;Zhan, Qingfeng;Dai, Guohong;Chen, Bin;Zhang, Xiaoshan;Yang, Huali;Liu, Yiwei;Li, Run-Wei;
7:4:1:73     Modeling of ferroelectric control of magnetic domain pattern and domain wall properties
DOI:10.1063/1.4799621  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Chen, H. T.;Ni, Y.;Soh, A. K.;
7:4:1:74     Giant electric-field-induced magnetic anisotropy reorientation with patterned electrodes on a Ni thin film/lead zirconate titanate heterostructure
DOI:10.1063/1.4863258  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Cui, Jizhai;Hockel, Joshua L.;Nordeen, Paul K.;Pisani, David M.;Carman, Gregory P.;Lynch, Christopher S.;
7:4:1:75     Time-dependent magnetoelectric effect in Fe/Pb(Mg1/3Nb2/3)(0.7)Ti0.3O3 heterostructure: A ferromagnetic resonance study
DOI:10.1063/1.4819220  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Zhao, Yue-Lei;Chen, Qian-Ping;Zhao, Yong-Gang;Pan, Liqing;Sun, Young;
7:4:1:76     Electrically controlled reversible and hysteretic magnetic domain evolution in nickel film/Pb(Mg1/3Nb2/3)O-3](0.68)-[PbTiO3](0.32) (011) heterostructure
DOI:10.1063/1.4811249  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Hockel, J. L.;Pollard, S. D.;Wetzlar, K. P.;Wu, T.;Zhu, Y.;Carman, G. P.;
7:4:1:77     Demonstration of magnetoelectric memory cell in (110) [Pb(Mg1/2Nb2/3)O-3](0.68)-[PbTiO3](0.32)/Ru/FeCo heterostructures
DOI:10.1063/1.4896270  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Han, Xuemeng;Xi, Li;Li, Yue;Guo, Xiaobin;Li, Dong;Wang, Zhen;Zuo, Yalu;Xue, Desheng;
7:4:1:78     Electrically induced enormous magnetic anisotropy in Terfenol-D/lead zinc niobate-lead titanate multiferroic heterostructures
DOI:10.1063/1.4754424  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:14  AU: Liu, Ming;Li, Shandong;Zhou, Ziyao;Beguhn, Shawn;Lou, Jing;Xu, Feng;Lu, Tian Jian;Sun, Nian X.;
7:4:1:79     Ferromagnetic resonance in epitaxial films: Effects of lattice strains and voltage control via ferroelectric substrate
DOI:10.1103/PhysRevB.84.014423  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Pertsev, N. A.;Kohlstedt, H.;Knoechel, R.;
7:4:1:80     Theory of domain wall motion mediated magnetoelectric effects in a multiferroic composite
DOI:10.1103/PhysRevB.90.144411  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Petrov, V. M.;Srinivasan, G.;
7:4:1:81     Magneto-optical Kerr effect investigation on magnetoelectric coupling in ferromagnetic/antiferroelectric multilayer thin film structures
DOI:10.1063/1.4764023  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Mirshekarloo, Meysam Sharifzadeh;Yakovlev, Nikolai;Wong, Meng Fei;Yao, Kui;Sritharan, Thirumany;Bhatia, Charanjit Singh;
7:4:1:82     Electric field tuning of domain magnetic resonances in yttrium iron garnet films
DOI:10.1063/1.4809580  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Zavislyak, I. V.;Popov, M. A.;Sreenivasulu, G.;Srinivasan, G.;
7:4:1:83     Microwave magnetoelectric effects in bilayers of piezoelectrics and ferrites with cubic magnetocrystalline anisotropy
DOI:10.1063/1.3483957  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Tatarenko, A. S.;Ustinov, A. B.;Srinivasan, G.;Petrov, V. M.;Bichurin, M. I.;
7:4:1:84     Large E-field tunability of microwave ferromagnetic properties in Fe50Co50-Hf/lead zinc niobate-lead titanate multiferroic laminates
DOI:10.1063/1.4799486  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Li, Shandong;Liu, Ming;Shao, Weiquan;Xu, Jie;Chen, Sha'ou;Zhou, Ziyao;Nan, Tianxiang;Sun, Nian X.;Duh, Jenq-Gong;
7:4:1:85     Electric-field-induced reorientation and flip in domain magnetization and light diffraction in an yttrium-iron-garnet/lead-zirconate-titanate bilayer
DOI:10.1103/PhysRevB.87.134417  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Zavislyak, I. V.;Sohatsky, V. P.;Popov, M. A.;Srinivasan, G.;
7:4:1:86     Tunable magnetoresistance devices based on multiferroic heterostructures
DOI:10.1063/1.3561771  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Liu, Ming;Obi, Ogheneyunume;Lou, Jing;Li, Shandong;Xing, Xing;Yang, Guomin;Sun, Nian X.;
7:4:1:87     Voltage control of the magnetic coercive field: Multiferroic coupling or artifact?
DOI:10.1063/1.3558982  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Vopsaroiu, M.;Cain, M. G.;Woolliams, P. D.;Weaver, P. M.;Stewart, M.;Wright, C. D.;Tran, Y.;
7:4:1:88     Large Electric-Field Modulation of Magnetic Properties in Fe Films on BiScO3-PbTiO3 Ceramics
DOI:10.1155/2010/142750  JN:JOURNAL OF NANOMATERIALS  PY:2010
  TC:7  AU: Wang, Jing;Wang, Han;Jiang, He;Wang, Xiaohui;Lin, Yuanhua;Nan, C. W.;
7:4:1:89     Electrical tuning of metastable dielectric constant of ferroelectric single crystals for low-power electronics
DOI:10.1063/1.3657516  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Wu, Tao;Bao, Mingqiang;Bur, Alexandre;Kim, Hyungsuk K. D.;Mohanchandra, Kotekar P.;Lynch, Christopher S.;Carman, Gregory P.;
7:4:1:90     The influence of in-plane ferroelectric crystal orientation on electrical modulation of magnetic properties in Co60Fe20B20/SiO2/(011) xPb(Mg1/3Nb2/3)O-3-(1-x)PbTiO3 heterostructures
DOI:10.1063/1.4745903  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Zhu, Guodong;Wong, Kin. L.;Zhao, J.;Amiri, Pedram K.;Wang, Kang L.;Hockel, J.;Carman, Gregory P.;Zhu, J.;Krivorotov, I.;
7:4:1:91     E-field tuning microwave frequency performance of Co2FeSi/lead zinc niobate-lead titanate magnetoelectric coupling composites
DOI:10.1063/1.3670979  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Li, Shandong;Liu, Ming;Lou, J.;Beguhn, Shawn;Wu, Jianpeng;Qiu, Jie;Lin, Jianhua;Cai, Zhiyi;Hu, Yi;Xu, Feng;Duh, Jenq-Gong;Sun, Nian X.;
7:4:1:92     Properties of ferroelectric/ferromagnetic thin film heterostructures
DOI:10.1063/1.4865316  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chen, Daming;Harward, Ian;Linderman, Katie;Economou, Evangelos;Nie, Yan;Celinski, Zbigniew;
7:4:1:93     Electric field-induced magnetoresistance in spin-valve/piezoelectric multiferroic laminates for low-power spintronics
DOI:10.1016/j.jmmm.2012.01.038  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Giang, D. T. Huong;Thuc, V. N.;Duc, N. H.;
7:4:1:94     Perpendicular magnetic anisotropy in piezoelectric- and dielectric-ferromagnetic heterostructures based on Co/Pt multilayers
DOI:10.1016/j.tsf.2012.12.107  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Lin, Weiwei;Lei, Na;Vernier, Nicolas;Agnus, Guillaume;Adam, Jean-Paul;Eimer, Sylvain;Devolder, Thibaut;Lecoeur, Philippe;Ravelosona, Dafine;
7:4:1:95     Electric field controlled magnetization rotation in exchange biased antiferromagnetic/ferromagnetic/piezoelectric composites
DOI:10.1063/1.3665952  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Lebedev, G. A.;Viala, B.;Lafont, T.;Zakharov, D. I.;Cugat, O.;Delamare, J.;
7:4:1:96     Quantitative analysis of electric field induced change in anisotropy field in Co60Fe20B20/(011) xPb(Mg1/3Nb2/3)O-3-(1-x)PbTiO3 (x similar to 0.68) heterostructures
DOI:10.1063/1.4767332  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Zhu, Guodong;Wong, Kin L.;Zhao, Jing;Amiri, Pedram Khalili;Zhu, Jian;Krivorotov, Ilya;Wang, Kang L.;
7:4:1:97     Voltage controlled modification of flux closure domains in planar magnetic structures for microwave applications
DOI:10.1063/1.4892942  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Parkes, D. E.;Beardsley, R.;Bowe, S.;Isakov, I.;Warburton, P. A.;Edmonds, K. W.;Campion, R. P.;Gallagher, B. L.;Rushforth, A. W.;Cavill, S. A.;
7:4:1:98     Non-volatile magnetoelectric edge effects observed using magnetic force microscopy
DOI:10.1063/1.4870420  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ghidini, M.;Pellicelli, R.;Mathur, N. D.;
7:4:1:99     Electric field modulation of surface anisotropy and magneto-dynamics in multiferroic heterostructures
DOI:10.1063/1.3562975  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Lou, J.;Liu, M.;Reed, D.;Ren, Y. H.;Sun, N. X.;
7:4:1:100     Low moment NiCr radio frequency magnetic films for multiferroic heterostructures with strong magnetoelectric coupling
DOI:10.1063/1.4722344  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Zhou, Z.;Beguhn, S.;Lou, J.;Rand, S.;Li, M.;Yang, X.;Li, S. D.;Liu, M.;Sun, N. X.;
7:4:1:101     Converse magnetoelectric effect dependence with CoFeB composition in ferromagnetic/piezoelectric composites
DOI:10.1063/1.3679443  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Lebedev, G. A.;Viala, B.;Lafont, T.;Zakharov, D. I.;Cugat, O.;Delamare, J.;
7:4:1:102     Strain-domain structure and stability diagrams for single-domain magnetic thin films (vol 103, 142413, 2013)
DOI:10.1063/1.4897348  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wang, J. J.;Hu, Jia-Mian;Chen, Long-Qing;Nan, Ce-Wen;
7:4:1:103     Structural Properties of Composite Thin Films BiFeO3 - Ba0.8Sr0.2TiO3
DOI:10.1080/00150193.2012.741920  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Bunina, O. A.;Zakharchenko, I. N.;Golovko, Yu. I.;Mukhortov, V. M.;Stryukov, D. V.;Yuzyuk, Yu. I.;
7:4:1:104     Electric poling-induced magnetic anisotropy and electric-field-induced magnetization reorientation in magnetoelectric Ni/(011) Pb(Mg1/3Nb2/3)O-3]((1-x))-[PbTiO3](x) heterostructure (vol 109, 07D732, 2011)
DOI:10.1063/1.3611391  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Wu, Tao;Bur, Alexandre;Wong, Kin;Hockel, Joshua Leon;Hsu, Chin-Jui;Kim, Hyungsuk K. D.;Wang, Kang L.;Carman, Gregory P.;
7:4:1:105     Magnetoelectric effect in AlN/CoFe bi-layer thin film composites
DOI:10.1063/1.3679042  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Babu, S. Narendra;Min, Seong-Gi;Yourdkhani, Amin;Caruntu, Gabriel;Malkinski, Leszek;
7:4:1:106     Spin dynamics of polycrystalline Ni films on Si substrate
DOI:10.1016/j.jmmm.2009.03.020  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:2  AU: Rhen, Fernando M. F.;Godsell, Jeffrey F.;O'Donnell, Terence;Roy, Saibal;
7:4:1:107     Magnetic field induced ferroelectric and dielectric properties in Pb(Zr0.5Ti0.5)O-3 films containing Fe3O4 nanoparticles
DOI:10.1016/j.tsf.2009.10.010  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Bai, Wei;Meng, Xiangjian;Lin, Tie;Zhu, Xia;Ma, Jianhua;Liu, Weijing;Sun, Jinglan;Chu, Junhao;
7:4:2:1     High spin-filter efficiency in a Co ferrite fabricated by a thermal oxidation
DOI:10.1063/1.3318297  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:36  AU: Takahashi, Y. K.;Kasai, S.;Furubayashi, T.;Mitani, S.;Inomata, K.;Hono, K.;
7:4:2:2     Effect of epitaxial strain on the cation distribution in spinel ferrites CoFe2O4 and NiFe2O4: A density functional theory study
DOI:10.1063/1.3631676  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:25  AU: Fritsch, Daniel;Ederer, Claude;
7:4:2:3     Epitaxial strain effects in the spinel ferrites CoFe2O4 and NiFe2O4 from first principles
DOI:10.1103/PhysRevB.82.104117  JN:PHYSICAL REVIEW B  PY:2010
  TC:35  AU: Fritsch, Daniel;Ederer, Claude;
7:4:2:4     Monitoring B-site ordering and strain relaxation in NiFe2O4 epitaxial films by polarized Raman spectroscopy
DOI:10.1103/PhysRevB.83.014108  JN:PHYSICAL REVIEW B  PY:2011
  TC:23  AU: Iliev, M. N.;Mazumdar, D.;Ma, J. X.;Gupta, A.;Rigato, F.;Fontcuberta, J.;
7:4:2:5     Short-range B-site ordering in the inverse spinel ferrite NiFe2O4
DOI:10.1103/PhysRevB.82.024104  JN:PHYSICAL REVIEW B  PY:2010
  TC:28  AU: Ivanov, V. G.;Abrashev, M. V.;Iliev, M. N.;Gospodinov, M. M.;Meen, J.;Aroyo, M. I.;
7:4:2:6     Spin-filtering efficiency of ferrimagnetic spinels CoFe2O4 and NiFe2O4
DOI:10.1103/PhysRevB.87.024419  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Caffrey, Nuala M.;Fritsch, Daniel;Archer, Thomas;Sanvito, Stefano;Ederer, Claude;
7:4:2:7     Fully spin-polarized two-dimensional electron gas at the CoFe2O4/MgAl2O4(001) polar interface
DOI:10.1103/PhysRevB.90.045411  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Arras, R.;Calmels, L.;
7:4:2:8     Chemical tuning of the optical band gap in spinel ferrites: CoFe2O4 vs NiFe2O4
DOI:10.1063/1.4818315  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Holinsworth, B. S.;Mazumdar, D.;Sims, H.;Sun, Q. -C.;Yurtisigi, M. K.;Sarker, S. K.;Gupta, A.;Butler, W. H.;Musfeldt, J. L.;
7:4:2:9     First-principles calculation of magnetoelastic coefficients and magnetostriction in the spinel ferrites CoFe2O4 and NiFe2O4
DOI:10.1103/PhysRevB.86.014406  JN:PHYSICAL REVIEW B  PY:2012
  TC:12  AU: Fritsch, Daniel;Ederer, Claude;
7:4:2:10     Optical band gap hierarchy in a magnetic oxide: Electronic structure of NiFe2O4
DOI:10.1103/PhysRevB.86.205106  JN:PHYSICAL REVIEW B  PY:2012
  TC:13  AU: Sun, Q. -C.;Sims, H.;Mazumdar, D.;Ma, J. X.;Holinsworth, B. S.;O'Neal, K. R.;Kim, G.;Butler, W. H.;Gupta, A.;Musfeldt, J. L.;
7:4:2:11     The Poisson Ratio in CoFe2O4 Spinel Thin Films
DOI:10.1002/adfm.201200257  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:15  AU: Foerster, Michael;Iliev, Milko;Dix, Nico;Marti, Xavier;Barchuk, Mykhailo;Sanchez, Florencio;Fontcuberta, Josep;
7:4:2:12     Stress-mediated magnetic anisotropy and magnetoelastic coupling in epitaxial multiferroic PbTiO3-CoFe2O4 nanostructures
DOI:10.1063/1.4800069  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Tsai, C. Y.;Chen, H. R.;Chang, F. C.;Tsai, W. C.;Cheng, H. M.;Chu, Y. H.;Lai, C. H.;Hsieh, W. F.;
7:4:2:13     A robust approach for the growth of epitaxial spinel ferrite films
DOI:10.1063/1.3488638  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:26  AU: Ma, J. X.;Mazumdar, D.;Kim, G.;Sato, H.;Bao, N. Z.;Gupta, A.;
7:4:2:14     Optical and magneto-optical study of nickel and cobalt ferrite epitaxial thin films and submicron structures
DOI:10.1063/1.4792749  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Himcinschi, Cameliu;Vrejoiu, Ionela;Salvan, Georgeta;Fronk, Michael;Talkenberger, Andreas;Zahn, Dietrich R. T.;Rafaja, David;Kortus, Jens;
7:4:2:15     Anisotropic strain, magnetic properties, and lattice dynamics in self-assembled multiferroic CoFe2O4-PbTiO3 nanostructures
DOI:10.1063/1.4870803  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Tsai, C. Y.;Chen, H. R.;Chang, F. C.;Kuo, H. H.;Cheng, H. M.;Tsai, W. C.;Chu, Y. H.;Lai, C. H.;Hsieh, W. F.;
7:4:2:16     Formation of antiphase domains in NiFe2O4 thin films deposited on different substrates
DOI:10.1063/1.3481365  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:18  AU: Datta, R.;Kanuri, S.;Karthik, S. V.;Mazumdar, D.;Ma, J. X.;Gupta, A.;
7:4:2:17     Temperature dependent phonon Raman scattering of highly a-axis oriented CoFe2O4 inverse spinel ferromagnetic films grown by pulsed laser deposition
DOI:10.1063/1.3683520  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Liao, Y. Y.;Li, Y. W.;Hu, Z. G.;Chu, J. H.;
7:4:2:18     Dielectric response of epitaxially strained CoFe2O4 spinel thin films
DOI:10.1103/PhysRevB.86.125309  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Gutierrez, Diego;Foerster, Michael;Fina, Ignasi;Fontcuberta, Josep;Fritsch, Daniel;Ederer, Claude;
7:4:2:19     Strain analysis of multiferroic BiFeO3-CoFe2O4 nanostructures by Raman scattering
DOI:10.1063/1.3626595  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Chaix-Pluchery, O.;Cochard, C.;Jadhav, P.;Kreisel, J.;Dix, N.;Sanchez, F.;Fontcuberta, J.;
7:4:2:20     Probing optical band gaps at the nanoscale in NiFe2O4 and CoFe2O4 epitaxial films by high resolution electron energy loss spectroscopy
DOI:10.1063/1.4895059  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Dileep, K.;Loukya, B.;Pachauri, N.;Gupta, A.;Datta, R.;
7:4:2:21     Andreev reflection in ferrimagnetic CoFe2O4 spin filters
DOI:10.1103/PhysRevB.81.174415  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Rigato, Franco;Piano, Samanta;Foerster, Michael;Giubileo, Filippo;Cucolo, Anna Maria;Fontcuberta, Josep;
7:4:2:22     Direct evidence of spin filtering across MnFe2O4 tunnel barrier by Meservey-Tedrow experiment
DOI:10.1103/PhysRevB.87.184422  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Matzen, S.;Moussy, J. -B.;Miao, G. X.;Moodera, J. S.;
7:4:2:23     Electronic structure and optical band gap of CoFe2O4 thin films
DOI:10.1063/1.4759001  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Ravindra, A. V.;Padhan, P.;Prellier, W.;
7:4:2:24     Tuning of optical bandgap and magnetization of CoFe2O4 thin films
DOI:10.1063/1.4890863  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Sharma, Deepanshu;Khare, Neeraj;
7:4:2:25     Structure, magnetic, and transport properties of epitaxial ZnFe2O4 films: An experimental and first-principles study
DOI:10.1063/1.4881502  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Jin, Chao;Li, Peng;Mi, Wenbo;Bai, Haili;
7:4:2:26     Restoration of bulk magnetic properties by strain engineering in epitaxial CoFe2O4 (001) ultrathin films
DOI:10.1063/1.3622307  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Matzen, S.;Moussy, J. -B.;Mattana, R.;Petroff, F.;Gatel, C.;Warot-Fonrose, B.;Cezar, J. C.;Barbier, A.;Arrio, M. -A.;Sainctavit, Ph.;
7:4:2:27     Structure, magnetic ordering, and spin filtering efficiency of NiFe2O4(111) ultrathin films
DOI:10.1063/1.4871733  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Matzen, S.;Moussy, J. -B.;Wei, P.;Gatel, C.;Cezar, J. C.;Arrio, M. A.;Sainctavit, Ph.;Moodera, J. S.;
7:4:2:28     Structural features of epitaxial NiFe2O4 thin films grown on different substrates by direct liquid injection chemical vapor deposition
DOI:10.1016/j.jcrysgro.2012.02.007  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:11  AU: Datta, R.;Loukya, B.;Li, N.;Gupta, A.;
7:4:2:29     Epitaxial growth of spinel cobalt ferrite films on MgAl2O4 substrates by direct liquid injection chemical vapor deposition
DOI:10.1016/j.jcrysgro.2013.12.012  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:4  AU: Shen, Liming;Althammer, Matthias;Pachauri, Neha;Loukya, B.;Datta, Ranjan;Iliev, Milko;Bao, Ningzhong;Gupta, Arunava;
7:4:2:30     Spin-Filter Tunnel Junction with Matched Fermi Surfaces
DOI:10.1103/PhysRevLett.109.076602  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:9  AU: Harada, T.;Ohkubo, I.;Lippmaa, M.;Sakurai, Y.;Matsumoto, Y.;Muto, S.;Koinuma, H.;Oshima, M.;
7:4:2:31     Relaxor-like ferroelectric behaviour favoured by short-range B-site ordering in 10% Ba2+ substituted MgFe2O4
DOI:10.1016/j.materresbull.2014.01.045  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Lekha, P. Chithra;Ramesh, G.;Revathi, V.;Subramanian, V.;
7:4:2:32     Epitaxial growth and ferrimagnetic behavior of MnFe2O4(111) ultrathin layers for room-temperature spin filtering
DOI:10.1103/PhysRevB.83.184402  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Matzen, S.;Moussy, J. -B.;Mattana, R.;Bouzehouane, K.;Deranlot, C.;Petroff, F.;Cezar, J. C.;Arrio, M. -A.;Sainctavit, Ph.;Gatel, C.;Warot-Fonrose, B.;Zheng, Y.;
7:4:2:33     Tunable band gap in Bi(Fe1-xMnx)O-3 films
DOI:10.1063/1.3427499  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:18  AU: Xu, X. S.;Ihlefeld, J. F.;Lee, J. H.;Ezekoye, O. K.;Vlahos, E.;Ramesh, R.;Gopalan, V.;Pan, X. Q.;Schlom, D. G.;Musfeldt, J. L.;
7:4:2:34     Thickness dependence of the magnetoelastic effect of CoFe2O4 films grown on piezoelectric substrates
DOI:10.1063/1.4816686  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Rus, S. F.;Herklotz, A.;Roth, R.;Schultz, L.;Doerr, K.;
7:4:2:35     Distinct magnetism in ultrathin epitaxial NiFe2O4 films on MgAl2O4 and SrTiO3 single crystalline substrates
DOI:10.1103/PhysRevB.84.144422  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Foerster, Michael;Manuel Rebled, Jose;Estrade, Sonia;Sanchez, Florencio;Peiro, Francesca;Fontcuberta, Josep;
7:4:2:36     Magnetism of CoFe2O4 ultrathin films on MgAl2O4 driven by epitaxial strain
DOI:10.1063/1.4819178  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Gatel, C.;Warot-Fonrose, B.;Matzen, S.;Moussy, J. -B.;
7:4:2:37     Magnetic properties of mixed spinel BaTiO3-NiFe2O4 composites
DOI:10.1063/1.4869782  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Sarkar, Babusona;Dalal, Biswajit;Ashok, Vishal Dev;Chakrabarti, Kaushik;Mitra, Amitava;De, S. K.;
7:4:2:38     Optical and electronic properties of NiFe2O4 and CoFe2O4 thin films
DOI:10.1007/s00339-011-6549-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:10  AU: Rai, R. C.;Wilser, S.;Guminiak, M.;Cai, B.;Nakarmi, M. L.;
7:4:2:39     Microstructural and ferromagnetic resonance properties of epitaxial nickel ferrite films grown by chemical vapor deposition
DOI:10.1063/1.4754847  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Li, N.;Schaefer, S.;Datta, R.;Mewes, T.;Klein, T. M.;Gupta, A.;
7:4:2:40     Nanomagnetism of cobalt ferrite-based spin filters probed by spin-polarized tunneling
DOI:10.1063/1.4738790  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Matzen, Sylvia;Moussy, Jean-Baptiste;Mattana, Richard;Bouzehouane, Karim;Deranlot, Cyrile;Petroff, Frederic;
7:4:2:41     Thickness dependent structural, magnetic, and electronic properties of the epitaxial films of transparent conducting oxide NiCo2O4
DOI:10.1063/1.4820930  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Silwal, Punam;Miao, Ludi;Hu, Jin;Spinu, Leonard;Kim, Dae Ho;Talbayev, Diyar;
7:4:2:42     Nanopillar Spin Filter Tunnel Junctions with Manganite Barriers
DOI:10.1021/nl500798b  JN:NANO LETTERS  PY:2014
  TC:5  AU: Prasad, Bhagwati;Egilmez, Mehmet;Schoofs, Frank;Fix, Thomas;Vickers, Mary E.;Zhang, Wenrui;Jian, Jie;Wang, Haiyan;Blamire, Mark G.;
7:4:2:43     Large Tunnel Magnetoresistance in Epitaxial Oxide Spin-Filter Tunnel Junctions
DOI:10.1002/adfm.201200985  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:6  AU: Harada, Takayuki;Ohkubo, Isao;Lippmaa, Mikk;Sakurai, Yasuaki;Matsumoto, Yuji;Muto, Shunsuke;Koinuma, Hideomi;Oshima, Masaharu;
7:4:2:44     Nontunnel transport through CoFe2O4 nanometric barriers
DOI:10.1063/1.3527921  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Foerster, M.;Gutierrez, D. F.;Rigato, F.;Rebled, J. M.;Peiro, F.;Fontcuberta, J.;
7:4:2:45     Structural and magnetic properties of lithium ferrite (LiFe5O8) thin films: Influence of substrate on the octahedral site order
DOI:10.1063/1.3533908  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Boyraz, Cihat;Mazumdar, Dipanjan;Iliev, Milko;Marinova, Vera;Ma, Jianxing;Srinivasan, Gopalan;Gupta, Arunava;
7:4:2:46     Metal insulator transition with ferrimagnetic order in epitaxial thin films of spinel NiCo2O4
DOI:10.1063/1.3676439  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Silwal, Punam;Miao, Ludi;Stern, Ilan;Zhou, Xiaolan;Hu, Jin;Kim, Dae Ho;
7:4:2:47     Influence of oxygen vacancies on the electronic structure and magnetic properties of NiFe2O4 thin films
DOI:10.1063/1.4704690  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Jaffari, G. Hassnain;Rumaiz, A. K.;Woicik, J. C.;Shah, S. Ismat;
7:4:2:48     Electric transport through nanometric CoFe2O4 thin films investigated by conducting atomic force microscopy
DOI:10.1063/1.3672839  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Foerster, M.;Gutierrez, D. F.;Rebled, J. M.;Arbelo, E.;Rigato, F.;Jourdan, M.;Peiro, F.;Fontcuberta, J.;
7:4:2:49     Raman studies of cation distribution and thermal stability of epitaxial spinel NiCo2O4 films
DOI:10.1063/1.4815874  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Iliev, M. N.;Silwal, P.;Loukya, B.;Datta, R.;Kim, D. H.;Todorov, N. D.;Pachauri, N.;Gupta, A.;
7:4:2:50     Effect of growth temperature on the terahertz-frequency conductivity of the epitaxial transparent conducting spinel NiCo2O4 films
DOI:10.1063/1.4821548  JN:AIP ADVANCES  PY:2013
  TC:2  AU: Silwal, Punam;La-o-Vorakiat, Chan;Chia, Elbert E. M.;Kim, Dae Ho;Talbayev, Diyar;
7:4:2:51     A first-principles study of magnetostrictions of Fe3O4 and CoFe2O4
DOI:10.1063/1.4863811  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Odkhuu, Dorj;Taivansaikhan, Purev;Yun, Won Seok;Hong, Soon Cheol;
7:4:2:52     Field-induced magnetic transition in cobalt-ferrite
DOI:10.1063/1.3671778  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Kriegisch, Martin;Ren, Weijun;Sato-Turtelli, Reiko;Mueller, Herbert;Groessinger, Roland;Zhang, Zhidong;
7:4:2:53     Structural and magnetic properties of pulsed laser deposited SrRuO3/CoFe2O4/La2/3Sr1/3MnO3 magnetic oxide heterostructures on SrTiO3(001) and MgO(001)
DOI:10.1007/s00339-012-7192-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:1  AU: Akaslompolo, Laura;Sanchez, Ana M.;Qin, Qi Hang;Hakola, Antti;Kajava, Timo;van Dijken, Sebastiaan;
7:4:2:54     Direct spectroscopic identification of the magnetic structure of the interface of Mn3O4/Fe3O4 superlattices
DOI:10.1016/j.jallcom.2014.06.074  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Chen, C. L.;Dong, C. L.;Chern, G.;Kumar, K.;Lin, H. J.;Chen, C. T.;Chang, C. L.;Fujimori, A.;
7:4:2:55     Electric-field-induced monoclinic phase in (Ba,Sr)TiO3 thin film
DOI:10.1063/1.3573516  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Anokhin, A. S.;Yuzyuk, Yu. I.;Golovko, Yu. I.;Mukhortov, V. M.;El Marssi, M.;
7:4:2:56     Nonaqueous synthesis and magnetic properties of ZnFe2O4 nanocrystals with narrow size distributions
DOI:10.1063/1.3540407  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Jeong, Jaeho;Min, Ji Hyun;Song, Ah-Young;Lee, Ji Sung;Ju, Jae-Seon;Wu, Jun Hua;Kim, Young Keun;
7:4:2:57     Dielectric properties of lead indium niobate ceramics synthesized by conventional solid state reaction method
DOI:10.1016/j.materresbull.2010.09.006  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:4  AU: Ramesh, G.;Subramanian, V.;Sivasubramanian, V.;
7:4:2:58     Growth and magnetic properties of ultrathin Ni1+xFe2-xO4 films for spin filter junctions
DOI:10.1016/j.tsf.2011.03.104  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Nagahama, Taro;Kubota, Hitoshi;Yuasa, Shinji;
7:4:3:1     Self-Assembled Heteroepitaxial Oxide Nanocomposite Thin Film Structures: Designing Interface-Induced Functionality in Electronic Materials
DOI:10.1002/adfm.201000373  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:66  AU: MacManus-Driscoll, Judith L.;
7:4:3:2     Tunable Low-Field Magnetoresistance in (La0.7Sr0.3MnO3)(0.5):(ZnO)(0.5) Self-Assembled Vertically Aligned Nanocomposite Thin Films
DOI:10.1002/adfm.201002746  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:55  AU: Chen, Aiping;Bi, Zhenxing;Tsai, Chen-Fong;Lee, JoonHwan;Su, Qing;Zhang, Xinghang;Jia, Quanxi;MacManus-Driscoll, Judith L.;Wang, Haiyan;
7:4:3:3     Microstructure, vertical strain control and tunable functionalities in self-assembled, vertically aligned nanocomposite thin films
DOI:10.1016/j.actamat.2012.09.072  JN:ACTA MATERIALIA  PY:2013
  TC:25  AU: Chen, Aiping;Bi, Zhenxing;Jia, Quanxi;MacManus-Driscoll, Judith L.;Wang, Haiyan;
7:4:3:4     Large, Temperature-Tunable Low-Field Magnetoresistance in La0.7Sr0.3MnO3:NiO Nanocomposite Films Modulated by Microstructures
DOI:10.1002/adfm.201400735  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:6  AU: Ning, Xingkun;Wang, Zhanjie;Zhang, Zhidong;
7:4:3:5     A New Class of Room-Temperature Multiferroic Thin Films with Bismuth-Based Supercell Structure
DOI:10.1002/adma.201203051  JN:ADVANCED MATERIALS  PY:2013
  TC:24  AU: Chen, Aiping;Zhou, Honghui;Bi, Zhenxing;Zhu, Yuanyuan;Luo, Zhiping;Bayraktaroglu, Adrian;Phillips, Jamie;Choi, Eun-Mi;MacManus-Driscoll, Judith L.;Pennycook, Stephen J.;Narayan, Jagdish;Jia, Quanxi;Zhang, Xinghang;Wang, Haiyan;
7:4:3:6     Local Conduction at the BiFeO3-CoFe2O4 Tubular Oxide Interface
DOI:10.1002/adma.201201929  JN:ADVANCED MATERIALS  PY:2012
  TC:23  AU: Hsieh, Ying-Hui;Liou, Jia-Ming;Huang, Bo-Chao;Liang, Chen-Wei;He, Qing;Zhan, Qian;Chiu, Ya-Ping;Chen, Yi-Chun;Chu, Ying-Hao;
7:4:3:7     Microstructure, magnetic, and low-field magnetotransport properties of self-assembled (La0.7Sr0.3MnO3)(0.5):(CeO2)(0.5) vertically aligned nanocomposite thin films
DOI:10.1088/0957-4484/22/31/315712  JN:NANOTECHNOLOGY  PY:2011
  TC:21  AU: Chen, Aiping;Bi, Zhenxing;Hazariwala, Harshad;Zhang, Xinghang;Su, Qing;Chen, Li;Jia, Quanxi;MacManus-Driscoll, Judith L.;Wang, Haiyan;
7:4:3:8     Ferroelectric Properties of Vertically Aligned Nanostructured BaTiO3-CeO2 Thin Films and Their Integration on Silicon
DOI:10.1021/am403834k  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:7  AU: Khatkhatay, Fauzia;Chen, Aiping;Lee, Joon Hwan;Zhang, Wenrui;Abdel-Raziq, Haron;Wang, Haiyan;
7:4:3:9     Research Updates: Epitaxial strain relaxation and associated interfacial reconstructions: The driving force for creating new structures with integrated functionality
DOI:10.1063/1.4828936  JN:APL MATERIALS  PY:2013
  TC:4  AU: Zhu, Yuanyuan;Chen, Aiping;Zhou, Honghui;Zhang, Wenrui;Narayan, Jagdish;MacManus-Driscoll, Judith L.;Jia, Quanxi;Wang, Haiyan;
7:4:3:10     Vertical-Interface-Manipulated Conduction Behavior in Nanocomposite Oxide Thin Films
DOI:10.1021/am5001129  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:3  AU: Li, Weiwei;Zhao, Run;Tang, Rujun;Chen, Aiping;Zhang, Wenrui;Lu, Xin;Wang, Haiyan;Yang, Hao;
7:4:3:11     Role of boundaries on low-field magnetotransport properties of La0.7Sr0.3MnO3-based nanocomposite thin films
DOI:10.1557/jmr.2013.89  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:5  AU: Chen, Aiping;Zhang, Wenrui;Jian, Jie;Wang, Haiyan;Tsai, Chen-Fong;Su, Qing;Jia, Quanxi;MacManus-Driscoll, Judith L.;
7:4:3:12     Magnetotransport properties of quasi-one-dimensionally channeled vertically aligned heteroepitaxial nanomazes
DOI:10.1063/1.4794899  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Chen, Aiping;Zhang, Wenrui;Khatkatay, Fauzia;Su, Qing;Tsai, Chen-Fong;Chen, Li;Jia, Q. X.;MacManus-Driscoll, Judith L.;Wang, H.;
7:4:3:13     Strain relaxation and enhanced perpendicular magnetic anisotropy in BiFeO3:CoFe2O4 vertically aligned nanocomposite thin films
DOI:10.1063/1.4864405  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhang, Wenrui;Jian, Jie;Chen, Aiping;Jiao, Liang;Khatkhatay, Fauzia;Li, Leigang;Chu, Frank;Jia, Quanxi;MacManus-Driscoll, Judith L.;Wang, Haiyan;
7:4:3:14     Integration of Self-Assembled Vertically Aligned Nanocomposite (La0.7Sr0.3MnO3)(1-x):(ZnO)(x) Thin Films on Silicon Substrates
DOI:10.1021/am400068h  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:14  AU: Zhang, Wenrui;Chen, Aiping;Khatkhatay, Fauzia;Tsai, Chen-Fong;Su, Qing;Jiao, Liang;Zhang, Xinghang;Wang, Haiyan;
7:4:3:15     Microstructural and magnetic properties of (La0.7Sr0.3MnO3)(0.7):(Mn3O4)(0.3) nanocomposite thin films
DOI:10.1063/1.3552594  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:19  AU: Bi, Zhenxing;Weal, Emily;Luo, Hongmei;Chen, Aiping;MacManus-Driscoll, Judith L.;Jia, Quanxi;Wang, Haiyan;
7:4:3:16     Influence of microstructure and interfacial strain on the magnetic properties of epitaxial Mn3O4/La0.7Sr0.3MnO3 layered-composite thin films
DOI:10.1063/1.4759237  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Mukherjee, Devajyoti;Bingham, Nicholas;Hordagoda, Mahesh;Manh-Huong Phan;Srikanth, Hariharan;Witanachchi, Sarath;Mukherjee, Pritish;
7:4:3:17     Large Magnetoresistance in Magnetically Coupled SrRuO3-CoFe2O4 Self-Assembled Nanostructures
DOI:10.1002/adma.201301461  JN:ADVANCED MATERIALS  PY:2013
  TC:5  AU: Liu, Heng-Jui;Vu-Thanh Tra;Chen, Ying-Jiun;Huang, Rong;Duan, Chun-Gang;Hsieh, Ying-Hui;Lin, Hong-Ji;Lin, Jiunn-Yuan;Chen, Chien-Te;Ikuhara, Yuichi;Chu, Ying-Hao;
7:4:3:18     Preparation of La0.7Sr0.3Mn1+xOy (1 <= x <= 4) thin films by chemical solution deposition: Dual epitaxy and possible spinodal growth
DOI:10.1016/j.jallcom.2013.02.004  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Jian, Hongbin;Zhang, Zhiqing;Wang, Yujia;Tang, Xianwu;Yang, Jie;Hu, Ling;Chen, Li;Zhu, Xuebin;Sun, Yuping;
7:4:3:19     Enhanced low-field magnetoresistance in LSMO/SFO composite system
DOI:10.1016/j.jmmm.2011.10.033  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:11  AU: Zi, Zhenfa;Fu, Yankun;Liu, Qiangchun;Dai, Jianming;Sun, Yuping;
7:4:3:20     Extremely High Tunability and Low Loss in Nanoscaffold Ferroelectric Films
DOI:10.1021/nl302032u  JN:NANO LETTERS  PY:2012
  TC:16  AU: Lee, OonJew;Harrington, Sophie A.;Kursumovic, Ahmed;Defay, Emmanuel;Wang, Haiyan;Bi, Zhenxing;Tsai, Chen-Fong;Yan, Li;Jia, Quanxi;MacManus-Driscoll, Judith L.;
7:4:3:21     Epitaxial Photostriction-Magnetostriction Coupled Self-Assembled Nanostructures
DOI:10.1021/nn301976p  JN:ACS NANO  PY:2012
  TC:17  AU: Liu, Heng-Jui;Chen, Long-Yi;He, Qing;Liang, Chen-Wei;Chen, Yu-Ze;Chien, Yung-Shun;Hsieh, Ying-Hui;Lin, Su-Jien;Arenholz, Elke;Luo, Chih-Wei;Chueh, Yu-Lun;Chen, Yi-Chun;Chu, Ying-Hao;
7:4:3:22     Enhanced Low-Field Magnetoresistance in La0.71Sr0.29MnO3 Nanoparticles Synthesized by the Nonaqueous Sol-Gel Route
DOI:10.1021/cm4041665  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:6  AU: Sadhu, Anustup;Bhattacharyya, Sayan;
7:4:3:23     Enhanced low-field magnetoresistance in La0.67Sr0.33MnO3:MgO composite films
DOI:10.1063/1.3665881  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Staruch, M.;Hires, D.;Chen, A.;Bi, Z.;Wang, H.;Jain, M.;
7:4:3:24     Strong oxygen pressure dependence of ferroelectricity in BaTiO3/SrRuO3/SrTiO3 epitaxial heterostructures
DOI:10.1063/1.4821643  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Chen, A. P.;Khatkhatay, F.;Zhang, W.;Jacob, C.;Jiao, L.;Wang, H.;
7:4:3:25     Electric-Field Control of Ferromagnetism in a Nanocomposite via a ZnO Phase
DOI:10.1021/nl402775h  JN:NANO LETTERS  PY:2013
  TC:6  AU: Fix, Thomas;Choi, Eun-Mi;Robinson, Jason W. A.;Lee, Shin Buhm;Chen, Aiping;Prasad, Bhagwati;Wang, Haiyan;Blamire, Mark G.;MacManus-Driscoll, Judith L.;
7:4:3:26     Combinatorial Growth and Anisotropy Control of Self-Assembled Epitaxial Ultrathin Alloy Nanowires
DOI:10.1021/nn4000308  JN:ACS NANO  PY:2013
  TC:7  AU: Bonilla, Francisco Javier;Novikova, Anastasiia;Vidal, Franck;Zheng, Yunlin;Fonda, Emiliano;Demaille, Dominique;Schuler, Vivien;Coati, Alessandro;Vlad, Alina;Garreau, Yves;Simkin, Michele Sauvage;Dumont, Yves;Hidki, Sarah;Etgens, Victor;
7:4:3:27     Role of modulus mismatch in vertically aligned nanocomposite formation during spinodal decomposition in constrained films
DOI:10.1063/1.4823700  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Liao, X. B.;Ni, Y.;Yang, H.;He, L. H.;
7:4:3:28     Strong room temperature exchange bias in self-assembled BiFeO3-Fe3O4 nanocomposite heteroepitaxial films
DOI:10.1063/1.4773567  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Choi, Eun-Mi;Weal, Emily;Bi, Zhenxing;Wang, Haiyan;Kursumovic, Ahmed;Fix, Thomas;Blamire, Mark G.;MacManus-Driscoll, Judith L.;
7:4:3:29     Manipulating leakage behavior via distribution of interfaces in oxide thin films
DOI:10.1063/1.4893778  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhao, Run;Li, Weiwei;Chen, Aiping;Zhang, Wenrui;Yang, Jun;Liang, Yan;Tang, Rujun;Wang, Haiyan;Yang, Hao;
7:4:3:30     Growth kinetics engineered magnetoresistance response in La2/3Sr1/3MnO3 thin films
DOI:10.1063/1.4871984  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Pomar, A.;Santiso, J.;Sandiumenge, F.;Roqueta, J.;Bozzo, B.;Frontera, C.;Balcells, Ll;Martinez, B.;Konstantinovic, Z.;
7:4:3:31     Structural Characterization and Magnetic and Electrical Properties of La0.7Ca0.3MnO3-La1.5Sr0.5NiO4 Nanocomposites
DOI:10.1007/s11664-014-3009-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Tran Dang Thanh;Hoang Thanh Van;The-Long Phan;Seong-Cho Yu;
7:4:3:32     Microstructure Map for Self-Organized Phase Separation during Film Deposition
DOI:10.1103/PhysRevLett.109.086101  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:6  AU: Lu, Yong;Wang, Cuiping;Gao, Yipeng;Shi, Rongpei;Liu, Xingjun;Wang, Yunzhi;
7:4:3:33     Tuning Electronic Transport in a Self-Assembled Nanocomposite
DOI:10.1021/nn501682t  JN:ACS NANO  PY:2014
  TC:1  AU: Chang, Wei Sea;Liu, Heng-Jui;Vu Thanh Tra;Chen, Jhih-Wei;Wei, Tzu-Chiao;Tzeng, W. Y.;Zhu, Yuanmin;Kuo, Ho-Hung;Hsieh, Ying-Hui;Lin, Jheng-Cyuan;Zhan, Qian;Luo, Chih Wei;Lin, Jiunn-Yuan;He, Jr-Hau;Wu, Chung Lin;Chu, Ying-Hao;
7:4:3:34     Systematic study of magnetotransport properties and enhanced low-field magnetoresistance in thin films of La0.67Sr0.33MnO3 + Mg(O)
DOI:10.1063/1.4792688  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Staruch, M.;Cantoni, C.;Jain, M.;
7:4:3:35     La0.7Ca0.3MnO3/Mn3O4 composites: Does an insulating secondary phase always enhance the low field magnetoresistance of manganites?
DOI:10.1063/1.3694664  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Bhame, S. D.;Fagnard, J. -F.;Pekala, M.;Vanderbemden, P.;Vertruyen, B.;
7:4:3:36     Reentrant insulating state in ultrathin manganite films
DOI:10.1063/1.3628659  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Kim, Bongju;Kwon, Daeyoung;Yajima, Takeaki;Bell, Christopher;Hikita, Yasuyuki;Kim, Bog G.;Hwang, Harold Y.;
7:4:3:37     Structure and magnetotransport properties of epitaxial nanocomposite La0.67Ca0.33MnO3:SrTiO3 thin films grown by a chemical solution approach
DOI:10.1063/1.3688048  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Fei, Ling;Zhu, Leyi;Cheng, Xuemei;Wang, Haiyan;Baber, Stacy M.;Hill, Joshua;Lin, Qianglu;Xu, Yun;Deng, Shuguang;Luo, Hongmei;
7:4:3:38     Ziz-zag interface and strain-influenced ferromagnetism in epitaxial Mn3O4/La0.7Sr0.3MnO3 thin films grown on SrTiO3 (100) substrates
DOI:10.1063/1.3680531  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Mukherjee, Devajyoti;Bingham, Nicholas;Manh-Huong Phan;Srikanth, Hariharan;Mukherjee, Pritish;Witanachchi, Sarath;
7:4:3:39     Nanocomposite lanthanum strontium manganite thin films formed by using a chemical solution deposition
DOI:10.1063/1.3675461  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Moreno, C.;Abellan, P.;Sandiumenge, F.;Casanove, M. -J.;Obradors, X.;
7:4:3:40     Electronic tuning of La2/3Sr1/3MnO3 thin films via heteroepitaxy
DOI:10.1063/1.3699047  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Wong, Franklin J.;Zhu, Shaobo;Iwata-Harms, Jodi M.;Suzuki, Yuri;
7:4:3:41     Magnetic properties of (CoFe2O4)(x):(CeO2)(1-x) vertically aligned nanocomposites and their pinning properties in YBa2Cu3O7-delta thin films
DOI:10.1063/1.4869217  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Huang, Jijie;Tsai, Chen-Fong;Chen, Li;Jian, Jie;Khatkhatay, Fauzia;Yu, Kaiyuan;Wang, Haiyan;
7:4:3:42     Interfacial defects distribution and strain coupling in the vertically aligned nanocomposite YBa2Cu3O7-X/BaSnO3 thin films
DOI:10.1557/jmr.2012.125  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:4  AU: Zhu, Yuanyuan;Tsai, Chen-Fong;Wang, Jie;Kwon, Ji Heon;Wang, Haiyan;Varanasi, Chakrapani V.;Burke, Jack;Brunke, Lyle;Barnes, Paul N.;
7:4:3:43     Large, Controllable Spikes of Magnetoresistance in La2/3Ca1/3MnO3/SrTiO3 Superlattices
DOI:10.1021/nn304127n  JN:ACS NANO  PY:2013
  TC:5  AU: Fedoseev, Sergey A.;Pan, Alexey V.;Rubanov, Sergey;Golovchanskiy, Igor A.;Shcherbakova, Olga V.;
7:4:3:44     Frequency dependence of magnetoelectric effect in epitaxial La0.7Sr0.3MnO3/BaTiO3 bilayer film
DOI:10.1016/j.apsusc.2012.01.027  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:4  AU: Li, Tingxian;Hu, Zhou;Zhang, Ming;Li, Kuoshe;Yu, Dunbo;Yan, Hui;
7:4:3:45     Low-Field Magnetoresistance in La0.67Sr0.33MnO3:ZnO Composite Film
DOI:10.1002/adfm.201200489  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:10  AU: Staruch, Margo;Gao, Haiyong;Gao, Pu-Xian;Jain, Menka;
7:4:3:46     Electrical transport and magnetoresistance in La2/3Ca1/3MnO3/BaZrO3 composites
DOI:10.1016/j.jallcom.2012.01.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Gao, Ling;Bai, Lifeng;Li, Chengshan;Liu, Xianghong;Wu, Zhanwen;Zheng, Dongning;Lu, Yafeng;
7:4:3:47     Nanocomposite stability in Fe-, Co-, and Mn-based perovskite/spinel systems
DOI:10.1557/jmr.2012.84  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:2  AU: Hoffmann, Joerg;Schnittger, Sven;Norpoth, Jonas;Raabe, Stephanie;Kramer, Thilo;Jooss, Christian;
7:4:3:48     Concurrent spinodal decomposition and surface roughening in thin solid films
DOI:10.1063/1.3624532  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Boyne, A.;Dregia, S. A.;Wang, Y.;
7:4:3:49     Tuning properties of columnar nanocomposite oxides
DOI:10.1063/1.4816596  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Liao, Zhaoliang;Gao, Peng;Stadler, Shane;Jin, Rongying;Pan, Xiaoqing;Plummer, E. W.;Zhang, Jiandi;
7:4:3:50     Enhanced low field magnetoresistance in La0.7Sr0.3MnO3-La2O3 composites
DOI:10.1016/j.jallcom.2011.12.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:10  AU: Kim, Hyo-Jin;Yoo, Sang-Im;
7:4:3:51     Magneto-transport and magnetic properties of (1-x) La0.7Ca0.3MnO3+xAl(2)O(3) composites
DOI:10.1016/j.jmmm.2010.08.060  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:8  AU: Thanh, T. D.;Phong, P. T.;Dai, N. V.;Manh, D. H.;Khiem, N. V.;Hong, L. V.;Phuc, N. X.;
7:4:3:52     Electrical properties and enhanced room temperature magnetoresistance in La0.7Ca0.2Sr0.1MnO3/Pd composites prepared by chemical plating
DOI:10.1016/j.jmmm.2012.05.018  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Chen, F. Y.;Wu, Y. Y.;Xiong, Y. H.;Li, L. J.;Liu, Z. L.;Xiong, C. S.;
7:4:3:53     Magnetotransport properties of Pr0.5Ca0.5MnO3 thin films grown by a solution route
DOI:10.1063/1.3603011  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Staruch, M.;Stan, L.;Lee, J. H.;Wang, H.;Budnick, J. I.;Jain, M.;
7:4:3:54     Interface lattice displacement measurement to 1 pm by geometric phase analysis on aberration-corrected HAADF STEM images
DOI:10.1016/j.actamat.2013.06.006  JN:ACTA MATERIALIA  PY:2013
  TC:4  AU: Zhu, Yuanyuan;Ophus, Colin;Ciston, Jim;Wang, Haiyan;
7:4:3:55     Giant positive magnetoresistance in heterostructure (La0.7Sr0.3MnO3) coated with YBa2Cu3O7 composites
DOI:10.1007/s00339-010-6082-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:4  AU: Lin, Y. B.;Huang, Z. G.;Yang, Y. M.;Wang, S.;Li, S. D.;Zhang, F. M.;Du, Y. W.;
7:4:3:56     Temperature and voltage stress dependent dielectric relaxation process of the doped Ba0.67Sr0.33TiO3 ceramics
DOI:10.1063/1.4820838  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Yan, Shiguang;Mao, Chaoliang;Wang, Genshui;Yao, Chunhua;Cao, Fei;Dong, Xianlin;
7:4:3:57     Magnetotransport properties of quasi-one-dimensionally channeled vertically aligned heteroepitaxial nanomazes (vol 102, 093114, 2013)
DOI:10.1063/1.4865899  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chen, Aiping;Zhang, Wenrui;Khatkhatay, Fauzia;Su, Qing;Tsai, Chen-Fong;Chen, Li;Jia, Q. X.;MacManus-Driscoll, Judith L.;Wang, H.;
7:4:3:58     Enhanced Low-Field Magnetoresistance in La0.71Sr0.29MnO3 Nanoparticles Synthesized by the Nonaqueous Sol-Gel Route (vol 26, pg 1702, 2014)
DOI:10.1021/cm500656d  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:1  AU: Sadhu, Anustup;Bhattacharyya, Sayan;
7:4:3:59     Intrinsic and extrinsic transport properties of Pr0.67Ba0.33MnO3:Ag2O composites
DOI:10.1016/j.jallcom.2010.07.158  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Panwar, Neeraj;Coondoo, Indrani;Singh, R. S.;Agarwal, S. K.;
7:4:3:60     Low field magnetoresistance, temperature coefficient of resistance and magnetocaloric effect in Pr2/3Ba1/3MnO3:PdO composites
DOI:10.1016/j.matlet.2010.08.051  JN:MATERIALS LETTERS  PY:2010
  TC:11  AU: Panwar, Neeraj;Coondoo, Indrani;Agarwal, S. K.;
7:4:3:61     Self-assembled ferromagnetic cobalt/yttria-stabilized zirconia nanocomposites for ultrahigh density storage applications
DOI:10.1088/0957-4484/23/15/155602  JN:NANOTECHNOLOGY  PY:2012
  TC:6  AU: Shin, Junsoo;Goyal, Amit;Cantoni, Claudia;Sinclair, John W.;Thompson, James R.;
7:4:4:1     Self-biased magnetoelectric response in three-phase laminates
DOI:10.1063/1.3493154  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:46  AU: Yang, Su-Chul;Park, Chee-Sung;Cho, Kyung-Hoon;Priya, Shashank;
7:4:4:2     Flexural deformation in a compositionally stepped ferrite and magnetoelectric effects in a composite with piezoelectrics
DOI:10.1063/1.3428774  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:33  AU: Mandal, S. K.;Sreenivasulu, G.;Petrov, V. M.;Srinivasan, G.;
7:4:4:3     Low-frequency and resonance magnetoelectric effects in piezoelectric and functionally stepped ferromagnetic layered composites
DOI:10.1103/PhysRevB.84.144426  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Sreenivasulu, G.;Mandal, S. K.;Bandekar, S.;Petrov, V. M.;Srinivasan, G.;
7:4:4:4     Hysteresis and remanence in magnetoelectric effects in functionally graded magnetostrictive-piezoelectric layered composites
DOI:10.1103/PhysRevB.85.104404  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Laletin, U.;Sreenivasulu, G.;Petrov, V. M.;Garg, T.;Kulkarni, A. R.;Venkataramani, N.;Srinivasan, G.;
7:4:4:5     Tunable self-biased magnetoelectric response in homogenous laminates
DOI:10.1063/1.4769365  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:18  AU: Zhou, Yuan;Yang, Su Chul;Apo, Daniel J.;Maurya, Deepam;Priya, Shashank;
7:4:4:6     Giant self-biased magnetoelectric coupling in co-fired textured layered composites
DOI:10.1063/1.4791685  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:12  AU: Yan, Yongke;Zhou, Yuan;Priya, Shashank;
7:4:4:7     Direct and converse effect in magnetoelectric laminate composites
DOI:10.1063/1.3584863  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Cho, Kyung-Hoon;Priya, Shashank;
7:4:4:8     High sensitivity magnetic sensor consisting of ferromagnetic alloy, piezoelectric ceramic and high-permeability FeCuNbSiB
DOI:10.1016/j.jallcom.2011.01.173  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:35  AU: Chen, Lei;Li, Ping;Wen, Yumei;Wang, Dong;
7:4:4:9     Magneto-electric effects in functionally stepped magnetic nanobilayers on ferroelectric substrates: Observation and theory on the influence of interlayer exchange coupling
DOI:10.1063/1.4878458  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Gribov, I. V.;Osotov, V. I.;Nosov, A. P.;Petrov, V. M.;Sreenivasulu, G.;Srinivasan, G.;
7:4:4:10     Enhancement of resonant magnetoelectric effect in magnetostrictive/piezoelectric heterostructure by end bonding
DOI:10.1063/1.4799967  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:12  AU: Lu, Caijiang;Li, Ping;Wen, Yumei;Yang, Aichao;He, Wei;Zhang, Jitao;
7:4:4:11     Giant self-biased magnetoelectric response with obvious hysteresis in layered homogeneous composites of negative magnetostrictive material Samfenol and piezoelectric ceramics
DOI:10.1063/1.4829634  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Zhang, Jitao;Li, Ping;Wen, Yumei;He, Wei;Yang, Aichao;Lu, Caijiang;
7:4:4:12     Magnetoelectric coupling characteristics of five-phase laminate composite transducers based on nanocrystalline soft magnetic alloy
DOI:10.1063/1.4868983  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Qiu, Jing;Wen, Yumei;Li, Ping;Chen, Hengjia;
7:4:4:13     Enhanced magnetoelectric effect in longitudinal-longitudinal mode laminate with cofired interdigitated electrodes
DOI:10.1063/1.4862183  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Yan, Yongke;Zhou, Yuan;Priya, Shashank;
7:4:4:14     Magnetization-graded multiferroic composite and magnetoelectric effects at zero bias
DOI:10.1103/PhysRevB.84.014432  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Mandal, S. K.;Sreenivasulu, G.;Petrov, V. M.;Srinivasan, G.;
7:4:4:15     Dual-phase self-biased magnetoelectric energy harvester
DOI:10.1063/1.4829151  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Zhou, Yuan;Apo, Daniel J.;Priya, Shashank;
7:4:4:16     Resonance magnetoelectric couplings of piezoelectric ceramic and ferromagnetic constant-elasticity alloy composites with different layer structures
DOI:10.1016/j.jallcom.2012.12.007  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:10  AU: Chen, Lei;Li, Ping;Wen, Yumei;Zhu, Yong;
7:4:4:17     Zero-biased magnetoelectric composite Fe73.5Cu1Nb3Si13.5B9/Ni/Pb(Zr1-x,Tix)O-3 for current sensing
DOI:10.1016/j.jallcom.2013.12.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Lu, Caijiang;Li, Ping;Wen, Yumei;Yang, Aichao;Yang, Chao;Wang, Decai;He, Wei;Zhang, Jitao;
7:4:4:18     Magnetoelectric properties and magnetomechanical energy harvesting from stray vibration and electromagnetic wave by Pb(Mg1/3Nb2/3)O-3-Pb(Zr,Ti)O-3 single crystal/Ni cantilever
DOI:10.1063/1.4804959  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:14  AU: Kambale, Rahul C.;Yoon, Woon-Ha;Park, Dong-Soo;Choi, Jong-Jin;Ahn, Cheol-Woo;Kim, Jong-Woo;Hahn, Byung-Dong;Jeong, Dae-Yong;Lee, Byung Chul;Chung, Gwiy-Sang;Ryu, Jungho;
7:4:4:19     Investigation of magnetostrictive/piezoelectric multilayer composite with a giant zero-biased magnetoelectric effect
DOI:10.1007/s00339-013-7557-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:16  AU: Lu, Caijiang;Li, Ping;Wen, Yumei;Yang, Aichao;He, Wei;Zhang, Jitao;Yang, Jin;Wen, Jing;Zhu, Yong;Yu, Miao;
7:4:4:20     Enhanced sensitivity of magnetoelectric sensors by tuning the resonant frequency
DOI:10.1063/1.3617428  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Petrie, Jonathan R.;Fine, Jonathan;Mandal, Sanjay;Sreenivasulu, Gollapudi;Srinivasan, Gopalan;Edelstein, Alan S.;
7:4:4:21     Giant self-biased magnetoelectric coupling characteristics of three-phase composite with end-bonding structure
DOI:10.1063/1.4904799  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Huang, Dongyan;Lu, Caijiang;Han, Bing;Wang, Xin;Li, Chenxiao;Xu, Changbao;Gui, Junguo;Lin, Chenghui;
7:4:4:22     Magnetoelectric effects in multilayered magnetostrictive/piezoelectric composites with Fe-based nanocrystalline alloy at zero bias magnetic field
DOI:10.1016/j.jallcom.2014.01.163  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Chen, Lei;Li, Ping;Wen, Yumei;Zhu, Yong;
7:4:4:23     High magnetic field sensitivity in Pb(Zr,Ti)O(3)-Pb(Mg(1/3)Nb(2/3))O(3) single crystal/Terfenol-D/Metglas magnetoelectric laminate composites
DOI:10.1063/1.3406142  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:23  AU: Park, Chee-Sung;Cho, Kyung-Hoon;Arat, Mustafa Ali;Evey, Jeff;Priya, Shashank;
7:4:4:24     Self-biased converse magnetoelectric effect
DOI:10.1063/1.3662420  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Yang, Su Chul;Cho, Kyung-Hoon;Park, Chee-Sung;Priya, Shashank;
7:4:4:25     Multiple broadband magnetoelectric response in thickness-controlled Ni/[011] Pb(Mg1/3Nb2/3)O-3-Pb(Zr,Ti)O-3 single crystal/Ni laminates
DOI:10.1063/1.4817383  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Patil, Deepak Rajaram;Kambale, Rahul C.;Chai, Yisheng;Yoon, Woon-Ha;Jeong, Dae-Yong;Park, Dong-Soo;Kim, Jong-Woo;Choi, Jong-Jin;Ahn, Cheol-Woo;Hahn, Byung-Dong;Zhang, Shujun;Kim, Kee Hoon;Ryu, Jungho;
7:4:4:26     Enhancement of resonant and non-resonant magnetoelectric coupling in multiferroic laminates with anisotropic piezoelectric properties
DOI:10.1063/1.4792590  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Patil, Deepak Rajaram;Chai, Yisheng;Kambale, Rahul C.;Jeon, Byung-Gu;Yoo, Kyongjun;Ryu, Jungho;Yoon, Woon-Ha;Park, Dong-Soo;Jeong, Dae-Yong;Lee, Sang-Goo;Lee, Jeongho;Nam, Joong-Hee;Cho, Jeong-Ho;Kim, Byung-Ik;Kim, Kee Hoon;
7:4:4:27     Anisotropic self-biased dual- phase low frequency magneto-mechano-electric energy harvesters with giant power densities
DOI:10.1063/1.4870116  JN:APL MATERIALS  PY:2014
  TC:3  AU: Patil, Deepak Rajaram;Zhou, Yuan;Kang, Ju-Eun;Sharpes, Nathan;Jeong, Dae-Yong;Kim, Yang-Do;Kim, Kee Hoon;Priya, Shashank;Ryu, Jungho;
7:4:4:28     Large self-biased effect and dual-peak magnetoelectric effect in different three-phase magnetostrictive/piezoelectric composites
DOI:10.1016/j.jallcom.2014.04.003  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Chen, Lei;Li, Ping;Wen, Yumei;Zhu, Yong;
7:4:4:29     Enhanced Magnetodielectric Effect in Graded CoFe2O4/Pb(Zr0.52Ti0.48)O-3 Particulate Composite Films
DOI:10.1111/jace.12772  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Chen, Bo;Wang, Jun-Yong;Zhou, Ming-Xiu;Wan, Jian-Guo;Liu, Jun-Ming;
7:4:4:30     Highly zero-biased magnetoelectric response in magnetostrictive/piezoelectric composite
DOI:10.1063/1.4737404  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Chen, Lei;Li, Ping;Wen, Yumei;Wang, Pan;
7:4:4:31     Zigzag-shaped piezoelectric based high performance magnetoelectric laminate composite
DOI:10.1063/1.4880116  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Cho, Kyung-Hoon;Yan, Yongke;Folgar, Christian;Priya, Shashank;
7:4:4:32     Giant self-biased converse magnetoelectric effect in multiferroic heterostructure with single-phase magnetostrictive materials
DOI:10.1063/1.4900929  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhang, Jitao;Li, Ping;Wen, Yumei;He, Wei;Yang, Aichao;Wang, Decai;Yang, Chao;Lu, Caijiang;
7:4:4:33     Near-flat self-biased magnetoelectric response in geometry gradient composite
DOI:10.1063/1.4868340  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhou, Yuan;Priya, Shashank;
7:4:4:34     Effect of intensive and extensive loss factors on the dynamic response of magnetoelectric laminates
DOI:10.1063/1.3511285  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Cho, Kyung-Hoon;Park, Chee-Sung;Priya, Shashank;
7:4:4:35     Self-Bias Response of Lead-Free (1-x)[0.948 K0.5Na0.5NbO3-0.052 LiSbO3]-xNi(0.8)Zn(0.2)Fe(2)O(4)-Nickel Magnetoelectric Laminate Composites
DOI:10.1111/j.1551-2916.2011.04580.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:9  AU: Yang, Su-Chul;Ahn, Cheol-Woo;Cho, Kyung-Hoon;Priya, Shashank;
7:4:4:36     Self-biased large magnetoelectric coupling in co-sintered Bi0.5Na0.5TiO3 based piezoelectric and CoFe2O4 based magnetostrictive bilayered composite
DOI:10.1063/1.4904758  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Kumari, Mukesh;Singh, Amrita;Gupta, Arti;Prakash, Chandra;Chatterjee, Ratnamala;
7:4:4:37     Dynamic magnetostrictive properties of magnetization-graded ferromagnetic material and application in magnetoelectric composite
DOI:10.1063/1.4866089  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Lu, Caijiang;Li, Ping;Wen, Yumei;Yang, Aichao;Yang, Chao;Yang, Jin;He, Wei;Zhang, Jitao;Li, Wenli;
7:4:4:38     Magnetoelectric Laminate Composite: Effect of Piezoelectric Layer on Magnetoelectric Properties
DOI:10.1080/00150193.2014.923670  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Cho, Kyung-Hoon;Bichurin, M. I.;Petrov, V. M.;Bhalla, A.;Priya, Shashank;
7:4:4:39     Cofired Magnetoelectric Laminate Composites
DOI:10.1111/j.1551-2916.2010.04213.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Park, Chee-Sung;Priya, Shashank;
7:4:4:40     Co-fired magnetoelectric transformer
DOI:10.1063/1.4883492  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zhou, Yuan;Yan, Yongke;Priya, Shashank;
7:4:4:41     Shifting the operating frequency of magnetoelectric sensors
DOI:10.1063/1.3677840  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Petrie, Jonathan;Gray, David;Viehland, Dwight;Sreenivasulu, Gollapudi;Srinivasan, Gopalan;Mandal, Sanjay;Edelstein, Alan S.;
7:4:4:42     Magnetoelectric effects in functionally graded multiferroic bilayers
DOI:10.1063/1.4792657  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Zhang, C. L.;Chen, W. Q.;Zhang, Ch.;
7:4:4:43     The magnetostrictive material effects on magnetic field sensitivity for magnetoelectric sensor
DOI:10.1063/1.3670607  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Chen, Lei;Li, Ping;Wen, Yumei;Qiu, Jing;
7:4:4:44     Enhanced magnetoelectric properties in three-phase composites with 2-1-2 connectivity
DOI:10.1080/14786435.2010.510451  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:4  AU: Park, Chee-Sung;Ahn, Cheolwoo;Priya, Shashank;
7:4:4:45     Controlled synthesis of MnFe2O4-Ni core-shell nanoparticles
DOI:10.1007/s10853-009-4110-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:2  AU: Yang, Su-Chul;Ahn, Cheol-Woo;Park, Chee-Sung;Yang, Yaodong;Viehland, Dwight;Priya, Shashank;
7:4:5:1     Origin of the Magnetoelectric Coupling Effect in Pb(Zr0.2Ti0.8)O-3/La0.8Sr0.2MnO3 Multiferroic Heterostructures
DOI:10.1103/PhysRevLett.104.127202  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:94  AU: Vaz, C. A. F.;Hoffman, J.;Segal, Y.;Reiner, J. W.;Grober, R. D.;Zhang, Z.;Ahn, C. H.;Walker, F. J.;
7:4:5:2     Artificial multiferroic heterostructures
DOI:10.1039/c3tc31428f  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:10  AU: Vaz, Carlos Antonio Fernandes;Staub, Urs;
7:4:5:3     Microscopic model for the ferroelectric field effect in oxide heterostructures
DOI:10.1103/PhysRevB.84.155117  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Dong, Shuai;Zhang, Xiaotian;Yu, Rong;Liu, J-M;Dagotto, Elbio;
7:4:5:4     Electric modulation of magnetization at the BaTiO3/La0.67Sr0.33MnO3 interfaces
DOI:10.1063/1.4726427  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:29  AU: Lu, H.;George, T. A.;Wang, Y.;Ketsman, I.;Burton, J. D.;Bark, C. -W.;Ryu, S.;Kim, D. J.;Wang, J.;Binek, C.;Dowben, P. A.;Sokolov, A.;Eom, C. -B.;Tsymbal, E. Y.;Gruverman, A.;
7:4:5:5     In situ magnetometry studies of magnetoelectric LSMO/PZT heterostructures
DOI:10.1103/PhysRevB.87.094416  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Leufke, Philipp M.;Kruk, Robert;Brand, Richard A.;Hahn, Horst;
7:4:5:6     Thickness-Dependent Crossover from Charge- to Strain-Mediated Magnetoelectric Coupling in Ferromagnetic/Piezoelectric Oxide Heterostructures
DOI:10.1021/nn405636c  JN:ACS NANO  PY:2014
  TC:6  AU: Spurgeon, Steven R.;Sloppy, Jennifer D.;Kepaptsoglou, Despoina Maria (Demie);Balachandran, Prasanna V.;Nejati, Siamak;Karthik, J.;Damodaran, Anoop R.;Johnson, Craig L.;Ambaye, Hailemariam;Goyette, Richard;Lauter, Valeria;Ramasse, Quentin M.;Idrobo, Juan Carlos;Lau, Kenneth K. S.;Lofland, Samuel E., Jr.;Rondinelli, James M.;Martin, Lane W.;Taheri, Mitra L.;
7:4:5:7     Temperature dependence of the magnetoelectric effect in Pb(Zr0.2Ti0.8)O-3/La0.8Sr0.2MnO3 multiferroic heterostructures
DOI:10.1063/1.3472259  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:26  AU: Vaz, C. A. F.;Segal, Y.;Hoffman, J.;Grober, R. D.;Walker, F. J.;Ahn, C. H.;
7:4:5:8     Electric field tuning of phase separation in manganite thin films
DOI:10.1103/PhysRevB.89.014425  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Lourembam, James;Wu, Jianchun;Ding, Junfeng;Lin, Weinan;Wu, Tom;
7:4:5:9     Magnetoelastic coupling in La0.7Ca0.3MnO3/BaTiO3 ultrathin films
DOI:10.1103/PhysRevB.88.134410  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Alberca, A.;Nemes, N. M.;Mompean, F. J.;Feher, T.;Simon, F.;Tornos, J.;Leon, C.;Munuera, C.;Kirby, B. J.;Fitzsimmons, M. R.;Hernando, A.;Santamaria, J.;Garcia-Hernandez, M.;
7:4:5:10     Full control of magnetism in a manganite bilayer by ferroelectric polarization
DOI:10.1103/PhysRevB.88.140404  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Dong, Shuai;Dagotto, Elbio;
7:4:5:11     Large-distance rf- and dc-sputtering of epitaxial La1-xSrxMnO3 thin films
DOI:10.1016/j.tsf.2012.04.064  JN:THIN SOLID FILMS  PY:2012
  TC:10  AU: Leufke, Philipp M.;Mishra, Ajay Kumar;Beck, Andre;Wang, Di;Kuebel, Christian;Kruk, Robert;Hahn, Horst;
7:4:5:12     Ferroelectric control of magnetization in La1-xSrxMnO3 manganites: A first-principles study
DOI:10.1103/PhysRevB.86.024433  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Chen, Hanghui;Ismail-Beigi, Sohrab;
7:4:5:13     Ferroelectric substrate effects on the magnetism, magnetotransport, and electroresistance of La0.7Ca0.3MnO3 thin films on BaTiO3
DOI:10.1103/PhysRevB.86.144416  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Alberca, A.;Munuera, C.;Tornos, J.;Mompean, F. J.;Biskup, N.;Ruiz, A.;Nemes, N. M.;de Andres, A.;Leon, C.;Santamaria, J.;Garcia-Hernandez, M.;
7:4:5:14     Magnetic properties of BaTiO3/La0.7Sr0.3MnO3 thin films integrated on Si(100)
DOI:10.1063/1.4903322  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Singamaneni, Srinivasa Rao;Fan, Wu;Prater, J. T.;Narayan, J.;
7:4:5:15     Origin of 90 degrees domain wall pinning in Pb(Zr0.2Ti0.8)O-3 heteroepitaxial thin films
DOI:10.1063/1.3634028  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Su, Dong;Meng, Qingping;Vaz, C. A. F.;Han, Myung-Geun;Segal, Yaron;Walker, Fred J.;Sawicki, Monica;Broadbridge, Christine;Ahn, Charles H.;
7:4:5:16     Charge control of antiferromagnetism at PbZr0.52Ti0.48O3/La0.67Sr0.33MnO3 interface
DOI:10.1063/1.4870507  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Ma, X.;Kumar, A.;Dussan, S.;Zhai, H.;Fang, F.;Zhao, H. B.;Scott, J. F.;Katiyar, R. S.;Luepke, G.;
7:4:5:17     Magnetic and electronic structure of ultrathin La1-xSrxMnO3 films at half doping
DOI:10.1103/PhysRevB.90.024414  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Vaz, C. A. F.;Moyer, J. A.;Arena, D. A.;Ahn, C. H.;Henrich, V. E.;
7:4:5:18     Reversible Modulation of Orbital Occupations via an Interface-Induced Polar State in Metallic Manganites
DOI:10.1021/nl501209p  JN:NANO LETTERS  PY:2014
  TC:8  AU: Chen, Hanghui;Qiao, Qiao;Marshall, Matthew S. J.;Georgescu, Alexandru B.;Gulec, Ahmet;Phillips, Patrick J.;Klie, Robert F.;Walker, Frederick J.;Ahn, Charles H.;Ismail-Beigi, Sohrab;
7:4:5:19     Probing ferromagnetic/ferroelectric interfaces via spin wave resonance
DOI:10.1063/1.4789761  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Zhao, Y. -L.;Sun, Y.;Pan, L. -Q.;Li, K. -S.;Yu, D. -B.;
7:4:5:20     Room temperature reversible tuning of magnetism of electrolyte-gated La0.75Sr0.25MnO3 nanoparticles
DOI:10.1063/1.4778918  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Mishra, A. K.;Darbandi, Azad J.;Leufke, Philipp M.;Kruk, Robert;Hahn, Horst;
7:4:5:21     Growth and characterization of PZT/LSMO multiferroic heterostructures
DOI:10.1116/1.3427140  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2010
  TC:10  AU: Vaz, C. A. F.;Segal, Y.;Hoffman, J.;Walker, F. J.;Ahn, C. H.;
7:4:5:22     Tailoring the interfacial magnetic anisotropy in multiferroic field-effect devices
DOI:10.1103/PhysRevB.90.125155  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Preziosi, Daniele;Fina, Ignasi;Pippel, Eckhard;Hesse, Dietrich;Marti, Xavi;Bern, Francis;Ziese, Michael;Alexe, Marin;
7:4:5:23     Direct Evidence for Cation Non-Stoichiometry and Cottrell Atmospheres Around Dislocation Cores in Functional Oxide Interfaces
DOI:10.1002/adma.200903631  JN:ADVANCED MATERIALS  PY:2010
  TC:16  AU: Arredondo, Miryam;Ramasse, Quentin M.;Weyland, Matthew;Mahjoub, Reza;Vrejoiu, Ionela;Hesse, Dietrich;Browning, Nigel D.;Alexe, Mann;Munroe, Paul;Nagarajan, Valanoor;
7:4:5:24     Exotic magnetic anisotropy map in epitaxial La0.7Ca0.3MnO3 films on BaTiO3
DOI:10.1103/PhysRevB.84.134402  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Alberca, A.;Nemes, N. M.;Mompean, F. J.;Biskup, N.;de Andres, A.;Munuera, C.;Tornos, J.;Leon, C.;Hernando, A.;Ferrer, P.;Castro, G. R.;Santamaria, J.;Garcia-Hernandez, M.;
7:4:5:25     Control of magnetism in Pb(Zr0.2Ti0.8)O-3/La0.8Sr0.2MnO3 multiferroic heterostructures (invited)
DOI:10.1063/1.3540694  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Vaz, C. A. F.;Hoffman, J.;Segal, Y.;Marshall, M. S. J.;Reiner, J. W.;Zhang, Z.;Grober, R. D.;Walker, F. J.;Ahn, C. H.;
7:4:5:26     Ordered Mesoporous Thin Film Ferroelectrics of Biaxially Textured Lead Zirconate Titanate (PZT) by Chemical Solution Deposition
DOI:10.1021/cm500381g  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:3  AU: Reitz, Christian;Leufke, Philipp M.;Hahn, Horst;Brezesinski, Torsten;
7:4:5:27     Electric field modulation of magnetism and electric properties in La-Ca-MnO3/Pb(Zr0.52Ti0.48)O-3 magnetoelectric laminate
DOI:10.1063/1.4795871  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Chen, Shuiyuan;Zhang, Huiqin;Liu, Fengjin;Ye, Qingying;Tang, Lei;Huang, Zhigao;Wang, Dunhui;
7:4:5:28     Ferroelectric vs. structural properties of large-distance sputtered epitaxial LSMO/PZT heterostructures
DOI:10.1063/1.4756997  JN:AIP ADVANCES  PY:2012
  TC:3  AU: Leufke, Philipp M.;Kruk, Robert;Wang, Di;Kuebel, Christian;Hahn, Horst;
7:4:5:29     Chemistry of Ruddlesden-Popper planar faults at a ferroelectric-ferromagnet perovskite interface
DOI:10.1063/1.3569858  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Arredondo, M.;Weyland, M.;Hambe, M.;Ramasse, Q. M.;Munroe, P.;Nagarajan, V.;
7:4:5:30     Effect of processing kinetics on the structure of ferromagnetic-ferroelectric-ferromagnetic interfaces
DOI:10.1063/1.4765045  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Krishnan, P. S. Sankara Rama;Ramasse, Q. M.;Liang, Wen-I;Chu, Ying-Hao;Nagarajan, V.;Munroe, P.;
7:4:5:31     Magnetic domain wall propagation under ferroelectric control
DOI:10.1103/PhysRevB.86.235130  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;
7:4:5:32     Phonon scattering of interfacial strain field between dissimilar lattices
DOI:10.1103/PhysRevB.87.064102  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Meng, Qingping;Wu, Lijun;Zhu, Yimei;
7:4:5:33     Polarization Dependence of Palladium Deposition on Ferroelectric Lithium Niobate (0001) Surfaces
DOI:10.1103/PhysRevLett.107.076102  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:1  AU: Kim, Seungchul;Schoenberg, Michael Rutenberg;Rappe, Andrew M.;
7:4:6:1     Giant magnetoelectric coefficients in (Fe90Co10)(78)Si12B10-AlN thin film composites
DOI:10.1063/1.3377908  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:82  AU: Greve, Henry;Woltermann, Eric;Quenzer, Hans-Joachim;Wagner, Bernhard;Quandt, Eckhard;
7:4:6:2     Low damping resonant magnetoelectric sensors
DOI:10.1063/1.3497277  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:39  AU: Greve, Henry;Woltermann, Eric;Jahns, Robert;Marauska, Stephan;Wagner, Bernhard;Knoechel, Reinhard;Wuttig, Manfred;Quandt, Eckhard;
7:4:6:3     Energy harvesting properties of all-thin-film multiferroic cantilevers
DOI:10.1063/1.3662037  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:22  AU: Onuta, Tiberiu-Dan;Wang, Yi;Long, Christian J.;Takeuchi, Ichiro;
7:4:6:4     Piezoelectric single crystal langatate and ferromagnetic composites: Studies on low-frequency and resonance magnetoelectric effects
DOI:10.1063/1.3679661  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:20  AU: Sreenivasulu, G.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;
7:4:6:5     Direct and converse magnetoelectric effects in Metglas/LiNbO3/Metglas trilayers
DOI:10.1063/1.4816400  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Timopheev, A. A.;Vidal, J. V.;Kholkin, A. L.;Sobolev, N. A.;
7:4:6:6     Giant magnetoelectric effect at low frequencies in polymer-based thin film composites
DOI:10.1063/1.4860664  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Kulkarni, A.;Meurisch, K.;Teliban, I.;Jahns, R.;Strunskus, T.;Piorra, A.;Knoechel, R.;Faupel, F.;
7:4:6:7     A permendur-piezoelectric multiferroic composite for low-noise ultrasensitive magnetic field sensors
DOI:10.1063/1.4705305  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Sreenivasulu, G.;Laletin, U.;Petrov, V. M.;Petrov, V. V.;Srinivasan, G.;
7:4:6:8     Enhanced sensitivity to direct current magnetic field changes in Metglas/Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) laminates
DOI:10.1063/1.3569629  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:23  AU: Gao, Junqi;Shen, Liangguo;Wang, Yaojing;Gray, David;Li, Jiefang;Viehland, D.;
7:4:6:9     Resonance magnetoelectric effects in a layered composite under magnetic and electrical excitations
DOI:10.1063/1.4733466  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Fetisov, L. Y.;Chashin, D. V.;Fetisov, Y. K.;Segalla, A. G.;Srinivasan, G.;
7:4:6:10     Theoretical and experimental investigation of magnetoelectric effect for bending-tension coupled modes in magnetostrictive-piezoelectric layered composites
DOI:10.1063/1.4732130  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:13  AU: Hasanyan, D.;Gao, J.;Wang, Y.;Viswan, R.;Li, M.;Shen, Y.;Li, J.;Viehland, D.;
7:4:6:11     Multiferroic composite for combined detection of static and alternating magnetic fields
DOI:10.1016/j.matlet.2011.08.094  JN:MATERIALS LETTERS  PY:2012
  TC:16  AU: Vopsaroiu, M.;Cain, M. G.;Sreenivasulu, G.;Srinivasan, G.;Balbashov, A. M.;
7:4:6:12     Theory of magnetoelectric effect in multilayer nanocomposites on a substrate: Static bending-mode response
DOI:10.1063/1.4790630  JN:AIP ADVANCES  PY:2013
  TC:14  AU: Krantz, Matthias C.;Gerken, Martina;
7:4:6:13     Giant converse magnetoelectric effect of AlN-(Fe90Co10)(78)Si12B10 thin film composites
DOI:10.1016/j.jallcom.2013.01.150  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Tong, B.;Yang, X. F.;Ouyang, J.;Lin, G. Q.;Chen, S.;
7:4:6:14     Comparison of noise floor and sensitivity for different magnetoelectric laminates
DOI:10.1063/1.3486483  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:18  AU: Gao, Junqi;Das, Jaydip;Xing, Zengping;Li, Jiefang;Viehland, D.;
7:4:6:15     Voltage bias influence on the converse magnetoelectric effect of PZT/terfenol-D/PZT laminates
DOI:10.1063/1.3553885  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Hockel, Joshua L.;Wu, Tao;Carman, Gregory P.;
7:4:6:16     Multiferroic bending mode resonators and studies on temperature dependence of magnetoelectric interactions
DOI:10.1063/1.4729124  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Burdin, D. A.;Chashin, D. V.;Ekonomov, N. A.;Fetisov, Y. K.;Srinivasan, G.;
7:4:6:17     Giant magnetoelectric effect in vacuum
DOI:10.1063/1.4810750  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Kirchhof, Christine;Krantz, Matthias;Teliban, Iulian;Jahns, Robert;Marauska, Stephan;Wagner, Bernhard;Knoechel, Reinhard;Gerken, Martina;Meyners, Dirk;Quandt, Eckhard;
7:4:6:18     Shear strain mediated magneto-electric effects in composites of piezoelectric lanthanum gallium silicate or tantalate and ferromagnetic alloys
DOI:10.1063/1.4891536  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Sreenivasulu, G.;Qu, P.;Piskulich, E.;Petrov, V. M.;Fetisov, Y. K.;Nosov, A. P.;Qu, Hongwei;Srinivasan, G.;
7:4:6:19     Giant Magnetoelectric Effect in Thin-Film Composites
DOI:10.1111/jace.12400  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:16  AU: Jahns, Robert;Piorra, Andre;Lage, Enno;Kirchhof, Christine;Meyners, Dirk;Gugat, Jascha Lukas;Krantz, Matthias;Gerken, Martina;Knoechel, Reinhard;Quandt, Eckhard;
7:4:6:20     Exchange biased magnetoelectric composites for vector field magnetometers
DOI:10.1063/1.4798791  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Lage, Enno;Woltering, Frederik;Quandt, Eckhard;Meyners, Dirk;
7:4:6:21     Temperature dependence of magnetoelectric coupling in FeBSiC/PZT/FeBSiC laminates
DOI:10.1063/1.4893371  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Ye, Jun-Xian;Ma, Jian-Nan;Ma, Jing;Hu, Jia-Mian;Li, Zheng;Feng, Ming;Zhang, Q. M.;Nan, C. W.;
7:4:6:22     Theory of magnetoelectric effect in multilayer nanocomposites on a substrate: Resonant bending-mode response
DOI:10.1063/1.4808204  JN:AIP ADVANCES  PY:2013
  TC:8  AU: Krantz, Matthias C.;Gerken, Martina;
7:4:6:23     A vibration energy harvester using magnet/piezoelectric composite transducer
DOI:10.1063/1.4867599  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Qiu, Jing;Chen, Hengjia;Wen, Yumei;Li, Ping;Yang, Jin;Li, Wenli;
7:4:6:24     High-sensitivity laminated magnetoelectric sensors without bias in composite of positive/negative giant magnetostrictive materials and piezoelectric single crystals
DOI:10.1063/1.4865973  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhang, Jitao;Li, Ping;Wen, Yumei;He, Wei;Yang, Jin;Li, Ming;Yang, Aichao;Lu, Caijiang;Li, Wenli;
7:4:6:25     Amorphous FeCoSiB for exchange bias coupled and decoupled magnetoelectric multilayer systems: Real-structure and magnetic properties
DOI:10.1063/1.4896662  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Hrkac, V.;Lage, E.;Koeppel, G.;Strobel, J.;McCord, J.;Quandt, E.;Meyners, D.;Kienle, L.;
7:4:6:26     Fully integrable magnetic field sensor based on delta-E effect
DOI:10.1063/1.3664135  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Gojdka, B.;Jahns, R.;Meurisch, K.;Greve, H.;Adelung, R.;Quandt, E.;Knoechel, R.;Faupel, F.;
7:4:6:27     Solving the electrical control of magnetic coercive field paradox
DOI:10.1063/1.4896521  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Vopson, M. M.;Lepadatu, S.;
7:4:6:28     A critical evaluation of the 0-3 approach for magnetoelectric nanocomposites with metallic nanoparticles
DOI:10.1063/1.4745892  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Gojdka, B.;Hrkac, V.;Xiong, J.;Gerken, M.;Kienle, L.;Strunskus, T.;Zaporojtchenko, V.;Faupel, F.;
7:4:6:29     Low-frequency nanotesla sensitivity in Metglas/piezoelectric/carbon fiber/piezoelectric composites with active tip mass
DOI:10.1063/1.3552970  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Park, Chee-Sung;Avirovik, Dragan;Bressers, Scott;Priya, Shashank;
7:4:6:30     Dual wavelength magneto-optical imaging of magnetic thin films
DOI:10.1063/1.4824426  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: von Hofe, Thomas;Urs, Necdet Onur;Mozooni, Babak;Jansen, Thomas;Kirchhof, Christine;Buergler, Daniel E.;Quandt, Eckhard;McCord, Jeffrey;
7:4:6:31     Origin of hysteretic magnetoelastic behavior in magnetoelectric 2-2 composites
DOI:10.1063/1.4901948  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Urs, Necdet Onur;Teliban, Iulian;Piorra, Andre;Knoechel, Reinhard;Quandt, Eckhard;McCord, Jeffrey;
7:4:6:32     Exchange biasing of magnetoelectric composites
DOI:10.1038/NMAT3306  JN:NATURE MATERIALS  PY:2012
  TC:66  AU: Lage, Enno;Kirchhof, Christine;Hrkac, Viktor;Kienle, Lorenz;Jahns, Robert;Knoechel, Reinhard;Quandt, Eckhard;Meyners, Dirk;
7:4:6:33     Resonance line shape, strain and electric potential distributions of composite magnetoelectric sensors
DOI:10.1063/1.4811369  JN:AIP ADVANCES  PY:2013
  TC:2  AU: Gerken, Martina;
7:4:6:34     Resonant magnetoelectric response of cantilevers with magnetostrictive and piezoelectric layers on opposite sides of the substrate
DOI:10.1063/1.4812873  JN:AIP ADVANCES  PY:2013
  TC:2  AU: Krantz, Matthias C.;Gugat, Jascha L.;Gerken, Martina;
7:4:6:35     Magnetoelectric thin film composites with interdigital electrodes
DOI:10.1063/1.4812706  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Piorra, A.;Jahns, R.;Teliban, I.;Gugat, J. L.;Gerken, M.;Knoechel, R.;Quandt, E.;
7:4:6:36     Magnetic domain control and voltage response of exchange biased magnetoelectric composites
DOI:10.1063/1.4870511  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Lage, E.;Urs, N. O.;Roebisch, V.;Teliban, I.;Knoechel, R.;Meyners, D.;McCord, J.;Quandt, E.;
7:4:6:37     Large converse magnetoelectric effect in ferromagnetic shape memory alloy Ni49Fe18Ga27Co6 and Pb(Zr0.52Ti0.48)O-3 laminates
DOI:10.1016/j.jallcom.2011.12.098  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Xuan, H. C.;Wang, L. Y.;Zheng, Y. X.;Cao, Q. Q.;Deng, Y.;Wang, D. H.;Du, Y. W.;
7:4:6:38     Microelectromechanical magnetic field sensor based on Delta E effect
DOI:10.1063/1.4891540  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Jahns, R.;Zabel, S.;Marauska, S.;Gojdka, B.;Wagner, B.;Knoechel, R.;Adelung, R.;Faupel, F.;
7:4:6:39     Design and testing of piezoelectric energy harvester for powering wireless sensors of electric line monitoring system
DOI:10.1063/1.3677771  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Qiu, Jing;Wen, Yumei;Li, Ping;Yang, Jin;
7:4:6:40     Synthesis of ferroelectric PZT fibers using sol-gel technique
DOI:10.1016/j.matlet.2010.11.070  JN:MATERIALS LETTERS  PY:2011
  TC:5  AU: Cho, Kyung-Hoon;Priya, Shashank;
7:4:6:41     Highly versatile concept for precise tailoring of nanogranular composites with a gas aggregation cluster source
DOI:10.1063/1.3696640  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Gojdka, B.;Zaporojtchenko, V.;Hrkac, V.;Xiong, J.;Kienle, L.;Strunskus, T.;Faupel, F.;
7:4:6:42     Revisiting magnetic stripe domains - anisotropy gradient and stripe asymmetry
DOI:10.1063/1.4792517  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: McCord, Jeffrey;Erkartal, Burak;von Hofe, Thomas;Kienle, Lorenz;Quandt, Eckhard;Roshchupkina, Olga;Grenzer, Joerg;
7:4:6:43     A concept for a magnetic field detector underpinned by the nonlinear dynamics of coupled multiferroic devices
DOI:10.1063/1.4846315  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Beninato, A.;Emery, T.;Baglio, S.;Ando, B.;Bulsara, A. R.;Jenkins, C.;Palkar, V.;
7:4:7:1     Electric field controlled manipulation of the magnetization in Ni/BaTiO3 hybrid structures
DOI:10.1063/1.3377923  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:62  AU: Gepraegs, S.;Brandlmaier, A.;Opel, M.;Gross, R.;Goennenwein, S. T. B.;
7:4:7:2     Converse magnetoelectric effects in Fe3O4/BaTiO3 multiferroic hybrids
DOI:10.1103/PhysRevB.88.054412  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Gepraegs, Stephan;Mannix, Dan;Opel, Matthias;Goennenwein, Sebastian T. B.;Gross, Rudolf;
7:4:7:3     Pattern Transfer and Electric-Field-Induced Magnetic Domain Formation in Multiferroic Heterostructures
DOI:10.1002/adma.201100426  JN:ADVANCED MATERIALS  PY:2011
  TC:51  AU: Lahtinen, Tuomas H. E.;Tuomi, Jussi O.;van Dijken, Sebastiaan;
7:4:7:4     Electric field control of magnetic anisotropies and magnetic coercivity in Fe/BaTiO3(001) heterostructures
DOI:10.1063/1.3554432  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:25  AU: Brivio, S.;Petti, D.;Bertacco, R.;Cezar, J. C.;
7:4:7:5     Strain induced changes in magnetization of amorphous Co95Zr5 based multiferroic heterostructures
DOI:10.1063/1.4792050  JN:AIP ADVANCES  PY:2013
  TC:9  AU: Moubah, Reda;Magnus, Fridrik;Zamani, Atieh;Kapaklis, Vassilios;Nordblad, Per;Hjorvarsson, Bjorgvin;
7:4:7:6     Piezoelectric tuning of exchange bias in a BaTiO3/Co/CoO heterostructure
DOI:10.1103/PhysRevB.82.134419  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Polisetty, S.;Echtenkamp, W.;Jones, K.;He, X.;Sahoo, S.;Binek, Ch;
7:4:7:7     Spatially resolved strain-imprinted magnetic states in an artificial multiferroic
DOI:10.1103/PhysRevB.86.014408  JN:PHYSICAL REVIEW B  PY:2012
  TC:18  AU: Chopdekar, R. V.;Malik, V. K.;Fraile Rodriguez, A.;Le Guyader, L.;Takamura, Y.;Scholl, A.;Stender, D.;Schneider, C. W.;Bernhard, C.;Nolting, F.;Heyderman, L. J.;
7:4:7:8     Strong magnetoelectric coupling in multiferroic Co/BaTiO3 thin films
DOI:10.1103/PhysRevB.88.121409  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Jedrecy, N.;von Bardeleben, H. J.;Badjeck, V.;Demaille, D.;Stanescu, D.;Magnan, H.;Barbier, A.;
7:4:7:9     Giant magnetoelastic effects in BaTiO3-based extrinsic multiferroic hybrids
DOI:10.1103/PhysRevB.86.134432  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Gepraegs, Stephan;Opel, Matthias;Goennenwein, Sebastian T. B.;Gross, Rudolf;
7:4:7:10     On the elastically coupled magnetic and ferroelectric domains: A phase-field model
DOI:10.1063/1.4875719  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yang, T. N.;Hu, Jia-Mian;Nan, C. W.;Chen, L. Q.;
7:4:7:11     Manipulation of magnetic coercivity of Fe film in Fe/BaTiO3 heterostructure by electric field
DOI:10.1063/1.3628464  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:18  AU: Venkataiah, G.;Shirahata, Y.;Itoh, M.;Taniyama, T.;
7:4:7:12     Switching of the symmetry of magnetic anisotropy in Fe/BaTiO3 heterostructures
DOI:10.1063/1.3609237  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Shirahata, Y.;Nozaki, T.;Venkataiah, G.;Taniguchi, H.;Itoh, M.;Taniyama, T.;
7:4:7:13     Hybrid Multiferroic Nanostructure with Magnetic-Dielectric Coupling
DOI:10.1021/nl300849u  JN:NANO LETTERS  PY:2012
  TC:21  AU: Narayanan, T. N.;Mandal, B. P.;Tyagi, A. K.;Kumarasiri, A.;Zhan, Xaiobo;Hahm, Myung Gwan;Anantharaman, M. R.;Lawes, G.;Ajayan, P. M.;
7:4:7:14     Strain-induced reversible and irreversible magnetization switching in Fe/BaTiO3 heterostructures
DOI:10.1063/1.3684695  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Venkataiah, G.;Shirahata, Y.;Suzuki, I.;Itoh, M.;Taniyama, T.;
7:4:7:15     Alternating domains with uniaxial and biaxial magnetic anisotropy in epitaxial Fe films on BaTiO3
DOI:10.1063/1.4773482  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Lahtinen, Tuomas H. E.;Shirahata, Yasuhiro;Yao, Lide;Franke, Kevin J. A.;Venkataiah, Gorige;Taniyama, Tomoyasu;van Dijken, Sebastiaan;
7:4:7:16     Strain-mediated elastic coupling in magnetoelectric nickel/barium-titanate heterostructures
DOI:10.1103/PhysRevB.87.054410  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Streubel, Robert;Koehler, Denny;Schaefer, Rudolf;Eng, Lukas M.;
7:4:7:17     Field tuning of ferromagnetic domain walls on elastically coupled ferroelectric domain boundaries
DOI:10.1103/PhysRevB.85.094423  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Franke, Kevin J. A.;Lahtinen, Tuomas H. E.;van Dijken, Sebastiaan;
7:4:7:18     Strain-driven spin reorientation in magnetite/barium titanate heterostructures
DOI:10.1063/1.3330890  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Sterbinsky, G. E.;Wessels, B. W.;Kim, J. -W.;Karapetrova, E.;Ryan, P. J.;Keavney, D. J.;
7:4:7:19     Temperature control of local magnetic anisotropy in multiferroic CoFe/BaTiO3
DOI:10.1063/1.4795529  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Lahtinen, Tuomas H. E.;van Dijken, Sebastiaan;
7:4:7:20     Spin and phonon anomalies in epitaxial self-assembled CoFe2O4-BaTiO3 multiferroic nanostructures
DOI:10.1063/1.4885497  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Tsai, C. Y.;Cheng, H. M.;Chen, H. R.;Huang, K. F.;Tsai, L. N.;Chu, Y. H.;Lai, C. H.;Hsieh, W. F.;
7:4:7:21     Modulation of the properties of thin ferromagnetic films with an externally applied electric field in ferromagnetic/piezoelectric/ferromagnetic hybrids
DOI:10.1063/1.4824373  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Stamopoulos, D.;Zeibekis, M.;Zhang, S. J.;
7:4:7:22     Strain enhanced magnetic anisotropy in SmCo/BaTiO3 multiferroic heterostructures
DOI:10.1063/1.4863819  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Moubah, R.;Magnus, F.;Hjorvarsson, B.;Andersson, G.;
7:4:7:23     Electric field driven magnetic domain wall motion in ferromagnetic-ferroelectric heterostructures
DOI:10.1063/1.4860963  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Van de Wiele, Ben;Laurson, Lasse;Franke, Kevin J. A.;van Dijken, Sebastiaan;
7:4:7:24     Inorganic-organic multiferroic hybrid films of Fe3O4 and PVDF with significant magneto-dielectric coupling
DOI:10.1039/c3tc30216d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:12  AU: Jayakumar, O. D.;Mandal, B. P.;Majeed, J.;Lawes, G.;Naik, R.;Tyagi, A. K.;
7:4:7:25     Size Dependence of Domain Pattern Transfer in Multiferroic Heterostructures
DOI:10.1103/PhysRevLett.112.017201  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:1  AU: Franke, Kevin J. A.;Gonzalez, Diego Lopez;Hamalainen, Sampo J.;van Dijken, Sebastiaan;
7:4:7:26     Electric-voltage control of magnetism in Fe/BaTiO3 heterostructured multiferroics
DOI:10.1063/1.4793511  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Venkataiah, G.;Wada, E.;Taniguchi, H.;Itoh, M.;Taniyama, T.;
7:4:7:27     Electric field driven variation in magnetoresistance of Co/Cu/Fe/BaTiO3 heterostructure
DOI:10.1063/1.4795819  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Kojima, Hidekazu;Naito, Tomoyuki;Muraoka, Hironobu;Wada, Eiji;Suzuki, Ippei;Shirahata, Yasuhiro;Itoh, Mitsuru;Taniyama, Tomoyasu;
7:4:7:28     Surface composition of BaTiO3/SrTiO3(001) films grown by atomic oxygen plasma assisted molecular beam epitaxy
DOI:10.1063/1.4768469  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Barbier, A.;Mocuta, C.;Stanescu, D.;Jegou, P.;Jedrecy, N.;Magnan, H.;
7:4:7:29     Magnetoelastic coupling in epitaxial cobalt ferrite/barium titanate heterostructures
DOI:10.1016/j.jmmm.2013.02.046  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:4  AU: Graefe, Joachim;Welke, Martin;Bern, Francis;Ziese, Michael;Denecke, Reinhard;
7:4:7:30     Temperature Dependence of Magnetization in Nickel Thin Film Sputtered onto Ferroelastic Gadolinium Molybdate Substrate
DOI:10.1080/10584587.2014.893704  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Graczyk, P.;Maciejewicz, O.;Breczewski, T.;Mroz, B.;
7:4:7:31     Pattern Transfer and Electric-Field-Induced Magnetic Domain Formation in Multiferroic Heterostructures (vol 23, pg 3187, 2011)
DOI:10.1002/adma.201190178  JN:ADVANCED MATERIALS  PY:2011
  TC:1  AU: Lahtinen, Tuomas H. E.;Tuomi, Jussi. O.;van Dijken, Sebastiaan;
7:4:7:32     Nanometer-scale epitaxial strain release in perovskite heterostructures using "SrAlOx" sliding buffer layers
DOI:10.1063/1.3583459  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Sato, H. K.;Mundy, J. A.;Higuchi, T.;Hikita, Y.;Bell, C.;Muller, D. A.;Hwang, H. Y.;
7:4:7:33     Preparation and Properties of Hydrophobic Poly( vinylidene fluoride)SiO2 Mixed Matrix Membranes for Dissolved Oxygen Removal from Water
DOI:10.1002/app.40430  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2014
  TC:1  AU: Li, Ting;Yu, Ping;Luo, Yunbai;
7:4:7:34     Evolution from (110) Fe to (111) Fe3O4 thin films grown by magnetron sputtering using Fe2O3 target
DOI:10.1016/j.jcrysgro.2011.12.041  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:2  AU: Wu, X. J.;Zhang, Z. Z.;Liang, Q. S.;Meng, J.;
7:4:8:1     Applying uniform reversible strain to epitaxial oxide films
DOI:10.1063/1.3374323  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:41  AU: Biegalski, M. D.;Doerr, K.;Kim, D. H.;Christen, H. M.;
7:4:8:2     Electrical characterization of PMN-28%PT(001) crystals used as thin-film substrates
DOI:10.1063/1.3503209  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:30  AU: Herklotz, Andreas;Plumhof, Johannes D.;Rastelli, Armando;Schmidt, Oliver G.;Schultz, Ludwig;Doerr, Kathrin;
7:4:8:3     Piezo-strain induced non-volatile resistance states in (011)-La2/3Sr1/3MnO3/0.7Pb(Mg2/3Nb1/3)O-3-0.3PbTiO(3) epitaxial heterostructures
DOI:10.1063/1.4788723  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Yang, Yuanjun;Luo, Z. L.;Yang, Meng Meng;Huang, Haoliang;Wang, Haibo;Bao, J.;Pan, Guoqiang;Gao, C.;Hao, Qiang;Wang, Shutong;Jokubaitis, Michael;Zhang, Wenzhe;Xiao, Gang;Yao, Yiping;Liu, Yukuai;Li, X. G.;
7:4:8:4     Electric-field-controlled interface strain coupling and non-volatile resistance switching of La1-xBaxMnO3 thin films epitaxially grown on relaxor-based ferroelectric single crystals
DOI:10.1063/1.4896172  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zheng, Ming;Zhu, Qiu-Xiang;Li, Xue-Yan;Yang, Ming-Min;Wang, Yu;Li, Xiao-Min;Shi, Xun;Luo, Hao-Su;Zheng, Ren-Kui;
7:4:8:5     Effects of ferroelectric-poling-induced strain on magnetic and transport properties of La0.67Ba0.33MnO3 thin films grown on (111)-oriented ferroelectric substrates
DOI:10.1063/1.4822269  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Zhu, Q. X.;Zheng, M.;Yang, M. M.;Li, X. M.;Wang, Y.;Shi, X.;Chan, H. L. W.;Luo, H. S.;Li, X. G.;Zheng, R. K.;
7:4:8:6     Electric-field control of phase separation and memory effect in Pr0.6Ca0.4MnO3/Pb(Mg1/3Nb2/3)(0.7)Ti0.3O3 heterostructures
DOI:10.1063/1.3584025  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:18  AU: Chen, Q. P.;Yang, J. J.;Zhao, Y. G.;Zhang, S.;Wang, J. W.;Zhu, M. H.;Yu, Y.;Zhang, X. Z.;Wang, Zhu;Yang, Bin;Xie, D.;Ren, T. L.;
7:4:8:7     Coaction and competition between the ferroelectric field effect and the strain effect in Pr0.5Ca0.5MnO3 film/0.67Pb(Mg1/3Nb2/3)O-3-0.33PbTiO(3) crystal heterostructures
DOI:10.1063/1.4761948  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Zhu, Q. X.;Wang, W.;Yang, S. W.;Li, X. M.;Wang, Y.;Habermeier, H. -U.;Luo, H. S.;Chan, H. L. W.;Li, X. G.;Zheng, R. K.;
7:4:8:8     Electric-Field-Modulated Nonvolatile Resistance Switching in VO2/PMN-PT(111) Heterostructures
DOI:10.1021/am405767q  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:6  AU: Zhi, Bowen;Gao, Guanyin;Xu, Haoran;Chen, Feng;Tan, Xuelian;Chen, Pingfan;Wang, Lingfei;Wu, Wenbin;
7:4:8:9     The strain effect and the ferroelectric field effect in LaMnO3+delta film/Pb(Mg1/3Nb2/3)O-3-PbTiO3 single-crystal heterostructures
DOI:10.1016/j.jallcom.2013.07.061  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Zhu, Q. X.;Yang, M. M.;Zheng, M.;Wang, W.;Wang, Y.;Li, X. M.;Luo, H. S.;Li, X. G.;Chan, H. L. W.;Zheng, R. K.;
7:4:8:10     Strain-mediated electric-field control of photoinduced demagnetization in La0.8Ca0.2MnO3 thin films
DOI:10.1063/1.3556613  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Guo, E. J.;Gao, J.;Lu, H. B.;
7:4:8:11     Tuning the switching time of BiFeO3 capacitors by electrodes' conductivity
DOI:10.1063/1.4813419  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Guo, E. J.;Herklotz, A.;Roth, R.;Christl, M.;Das, S.;Widdra, W.;Doerr, K.;
7:4:8:12     Electric-field-control of resistance and magnetization switching in multiferroic Zn0.4Fe2.6O4/0.7Pb(Mg2/3Nb1/3)O-3-0.3PbTiO(3) epitaxial heterostructures
DOI:10.1063/1.3579994  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Yang, Yuanjun;Luo, Z. L.;Huang, Haoliang;Gao, Yachun;Bao, J.;Li, X. G.;Zhang, Sen;Zhao, Y. G.;Chen, Xiangcun;Pan, Guoqiang;Gao, C.;
7:4:8:13     Effects of substrate-induced strain on transport properties of LaMnO3+delta and CaMnO3 thin films using ferroelectric poling and converse piezoelectric effect
DOI:10.1103/PhysRevB.81.104427  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Zheng, R. K.;Habermeier, H. -U.;Chan, H. L. W.;Choy, C. L.;Luo, H. S.;
7:4:8:14     Magnetoelastic response of La0.7Sr0.3MnO3/SrTiO3 superlattices to reversible strain
DOI:10.1103/PhysRevB.84.054463  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Dekker, M. C.;Herklotz, A.;Schultz, L.;Reibold, M.;Vogel, K.;Biegalski, M. D.;Christen, H. M.;Doerr, K.;
7:4:8:15     Strain controlled ferroelectric switching time of BiFeO3 capacitors
DOI:10.1063/1.4772006  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Guo, E. J.;Doerr, K.;Herklotz, A.;
7:4:8:16     Strong tensile strain induced charge/orbital ordering in (001)-La7/8Sr1/8MnO3 thin film on 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3)
DOI:10.1063/1.3298360  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Wang, J.;Hu, F. X.;Li, R. W.;Sun, J. R.;Shen, B. G.;
7:4:8:17     Interface strain coupling and its impact on the transport and magnetic properties of LaMnO3 thin films grown on ferroelectrically active substrates
DOI:10.1016/j.jallcom.2011.12.099  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Zheng, R. K.;Wang, Y.;Habermeier, H. -U.;Chan, H. L. W.;Li, X. M.;Luo, H. S.;
7:4:8:18     Stress and defect induced enhanced low field magnetoresistance and dielectric constant in La0.7Sr0.3MnO3 thin films
DOI:10.1016/j.jallcom.2011.09.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:15  AU: Majumdar, Sayani;Huhtinen, H.;Majumdar, H. S.;Paturi, P.;
7:4:8:19     Coaction and distinguishment of converse piezoelectric and field effects in La0.7Ca0.3MnO3/SrTiO3/0.68Pb(Mg1/3Nb2/3)O-3-0.32PbTiO(3) heterostructures
DOI:10.1063/1.4817018  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Jiang, Tao;Yang, Shengwei;Liu, Yukuai;Yin, Yuewei;Dong, Sining;Zhao, Wenbo;Li, Xiaoguang;
7:4:8:20     Modulation of persistent photoconductivity by electric-field-controlled strain in thin films of La0.39Pr0.24Ca0.37MnO3
DOI:10.1063/1.4793534  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Wang, J. F.;Jiang, Y. C.;Wu, Z. P.;Gao, J.;
7:4:8:21     Effects of ferroelectric-poling-induced strain on the electronic transport and magnetic properties of (001)- and (111)-oriented La0.5Ba0.5MnO3 thin films
DOI:10.1016/j.matchemphys.2014.01.021  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:1  AU: Li, X. Y.;Zheng, M.;Zhu, Q. X.;Yang, M. M.;Li, X. M.;Shi, X.;Yuan, G. L.;Wang, Y.;Chan, H. L. W.;Li, X. G.;Luo, H. S.;Zheng, R. K.;
7:4:8:22     Substrate-dependent post-annealing effects on the strain state and electrical transport of epitaxial La5/8-yPryCa3/8MnO3 films
DOI:10.1063/1.4881881  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Hu, Sixia;Huang, Haoliang;Yang, Yuanjun;Luo, Zhenlin;Yang, Mengmeng;Wang, Haibo;Dong, Yongqi;Hong, Bing;He, Hao;Bao, Jun;Gao, Chen;
7:4:8:23     Ferroelectric-domain-controlled magnetic anisotropy in Co40Fe40B20/YMnO3 multiferroic heterostructure
DOI:10.1063/1.4795518  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Wang, J. W.;Zhao, Y. G.;Fan, C.;Sun, X. F.;Rizwan, S.;Zhang, S.;Li, P. S.;Lin, Z.;Yang, Y. J.;Yan, W. S.;Luo, Z. L.;Zou, L. K.;Liu, H. L.;Chen, Q. P.;Zhang, X.;Zhu, M. H.;Zhang, H. Y.;Cai, J. W.;Han, X. F.;Cheng, Z. H.;Gao, C.;Xie, D.;Ren, T. L.;
7:4:8:24     Effects of residual and tunable strain in thin films of La0.7Ba0.3MnO3
DOI:10.1063/1.4796050  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Wang, J. F.;Jiang, Y. C.;Wu, Z. P.;Gao, J.;
7:4:8:25     Epitaxial growth and interface strain coupling effects in manganite film/piezoelectric-crystal multiferroic heterostructures
DOI:10.1016/j.matchemphys.2011.12.019  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:6  AU: Zheng, R. K.;Wang, Y.;Liu, Y. K.;Gao, G. Y.;Fei, L. F.;Jiang, Y.;Chan, H. L. W.;Li, X. M.;Luo, H. S.;Li, X. G.;
7:4:8:26     Phase competition induced nonlinear elastoresistance effect in thin films of Pr0.7Sr0.3MnO3
DOI:10.1063/1.3697687  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Wang, J. F.;Gao, J.;
7:4:8:27     Influence of the dynamic lattice strain on the transport behavior of oxide heterojunctions
DOI:10.1063/1.4788731  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Wang, J.;Hu, F. X.;Chen, L.;Zhao, Y. Y.;Lu, H. X.;Sun, J. R.;Shen, B. G.;
7:4:8:28     Effects of ferroelectric-poling-induced strain on the transport and magnetic properties of La7/8Ba1/8MnO3 thin films
DOI:10.1063/1.3464226  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Zheng, R. K.;Wang, Y.;Chan, H. L. W.;Choy, C. L.;Habermeier, H. -U.;Luo, H. S.;
7:4:8:29     The investigation of reversible strain and polarization effect in (011)-La0.9Ba0.1MnO3 film using field effect configuration
DOI:10.1063/1.3545805  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Wang, J.;Hu, F. X.;Chen, L.;Sun, J. R.;Shen, B. G.;
7:4:8:30     Dynamic variation of biaxial strain in optimally doped and underdoped YBa2Cu3O7-delta thin films
DOI:10.1063/1.4797493  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Pahlke, P.;Trommler, S.;Holzapfel, B.;Schultz, L.;Huehne, R.;
7:4:8:31     Static and reversible elastic strain effects on magnetic order of La0.7Ca0.3MnO3/SrTiO3 superlattices
DOI:10.1063/1.4870953  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Das, Sujit;Herklotz, Andreas;Guo, Er Jia;Doerr, Kathrin;
7:4:8:32     Enhancement of switching speed of BiFeO3 capacitors by magnetic fields
DOI:10.1063/1.4894758  JN:APL MATERIALS  PY:2014
  TC:0  AU: Guo, E. J.;Das, S.;Herklotz, A.;
7:4:8:33     Control of the strain and magnetoresistance of LaMnO3+delta thin films using the magnetostriction of Terfenol-D alloy
DOI:10.1063/1.3520677  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Zheng, R. K.;Wang, Y.;Chan, H. L. W.;Choy, C. L.;Luo, H. S.;
7:4:8:34     In situ control of electronic phase separation in La-1/8 Pr4/8Ca3/8MnO3/PNM-PT thin films using ferroelectric-poling-induced strain
DOI:10.1063/1.4772673  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Zhang, T.;Wei, Q.;Zheng, R. K.;Wang, X. P.;Fang, Q. F.;
7:4:8:35     Stress tuning of strong and weak couplings between quantum dots and cavity modes in microdisk microcavities
DOI:10.1103/PhysRevB.84.201301  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Lin, Hsuan;Lin, Chia-Hsien;Lai, Wei-Chen;Lee, Yi-Shan;Lin, Sheng-Di;Chang, Wen-Hao;
7:4:8:36     Static and dynamic strain effects in La0.7Ce0.3MnO3 thin films
DOI:10.1063/1.3544511  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Chen, L.;Hu, F. X.;Wang, J.;Shen, J.;Sun, J. R.;Shen, B. G.;Yin, J. H.;Pan, L. Q.;
7:4:8:37     Effects of electric-field-induced piezoelectric strain on the electronic transport properties of La0.9Ce0.1MnO3 thin films
DOI:10.1016/j.tsf.2012.10.088  JN:THIN SOLID FILMS  PY:2012
  TC:0  AU: Zheng, R. K.;Dong, S. N.;Wu, Y. Q.;Zhu, Q. X.;Wang, Y.;Chan, H. L. W.;Li, X. M.;Luo, H. S.;Li, X. G.;
7:4:8:38     Influence of lattice strain on charge/orbital ordering and phase separation in Pr-0.7(Ca0.6Sr0.4)(0.3)MnO3 thin films
DOI:10.1063/1.4863383  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhao, Y. Y.;Wang, J.;Hu, F. X.;Kuang, H.;Wu, R. R.;Zheng, X. Q.;Sun, J. R.;Shen, B. G.;
7:4:8:39     Magnetic, magnetoresistance, and magnetodielectric properties of oxygen deficient charge ordered manganite, Pr0.5Ca0.5MnO3-delta
DOI:10.1016/j.jmmm.2011.09.005  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Karmakar, A.;Majumdar, S.;Singh, A. K.;Patnaik, S.;Giri, S.;
7:4:8:40     Effect of strain and grain boundaries on dielectric properties in La0.7Sr0.3MnO3 thin films
DOI:10.1007/s10853-012-6986-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:2  AU: Majumdar, Sayani;Huhtinen, Hannu;Paturi, Petriina;Majumdar, Himadri S.;
7:4:8:41     Modulation of strain, resistance, and capacitance of tantalum oxide film by converse piezoelectric effect
DOI:10.1063/1.3609012  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Jia, Yanmin;Tian, Xiangling;Si, Jianxiao;Huang, Shihua;Wu, Zheng;Zhu, Chenchen;
7:4:8:42     Influence of ferroelectric poling induced strain on magnetic and electric properties in tetravalent cation-doped La0.9Hf0.1MnO3 films
DOI:10.1063/1.3670971  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Wu, Z. P.;Wang, L.;Guo, E. J.;Gao, J.;
7:4:8:43     Strain effect caused by substrates on phase separation and transport properties in Pr-0.7(Ca0.8Sr0.2)(0.3)MnO3 thin films
DOI:10.1063/1.3678297  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Zhao, Y. Y.;Hu, F. X.;Wang, J.;Chen, L.;Gao, W. W.;Shen, J.;Sun, J. R.;Shen, B. G.;
7:4:8:44     Collective Volume Plasmons in Manganites with Nanoscale Phase Separation: Simulation of the Measured Infrared Spectra of La0.7Ca0.3MnO3
DOI:10.1103/PhysRevLett.107.267401  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:1  AU: Sarychev, A. K.;Boyarintsev, S. O.;Rakhmanov, A. L.;Kugel, K. I.;Sukhorukov, Yu. P.;
7:4:9:1     In Situ Observation of Reversible Nanomagnetic Switching Induced by Electric Fields
DOI:10.1021/nl9036406  JN:NANO LETTERS  PY:2010
  TC:60  AU: Brintlinger, Todd;Lim, Sung-Hwan;Baloch, Kamal H.;Alexander, Paris;Qi, Yi;Barry, John;Melngailis, John;Salamanca-Riba, Lourdes;Takeuchi, I.;Cumings, John;
7:4:9:2     Multiferroic magnetoelectric composite nanostructures
DOI:10.1038/asiamat.2010.32  JN:NPG ASIA MATERIALS  PY:2010
  TC:85  AU: Wang, Yao;Hu, Jiamian;Lin, Yuanhua;Nan, Ce-Wen;
7:4:9:3     Hybrid spintronics and straintronics: A magnetic technology for ultra low energy computing and signal processing
DOI:10.1063/1.3624900  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:39  AU: Roy, Kuntal;Bandyopadhyay, Supriyo;Atulasimha, Jayasimha;
7:4:9:4     Switching dynamics of a magnetostrictive single-domain nanomagnet subjected to stress
DOI:10.1103/PhysRevB.83.224412  JN:PHYSICAL REVIEW B  PY:2011
  TC:22  AU: Roy, Kuntal;Bandyopadhyay, Supriyo;Atulasimha, Jayasimha;
7:4:9:5     Combined nanomechanical and nanomagnetic analysis of magnetoelectric memories
DOI:10.1103/PhysRevB.85.155321  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Giordano, Stefano;Dusch, Yannick;Tiercelin, Nicolas;Pernod, Philippe;Preobrazhensky, Vladimir;
7:4:9:6     Energy dissipation and switching delay in stress-induced switching of multiferroic nanomagnets in the presence of thermal fluctuations
DOI:10.1063/1.4737792  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:25  AU: Roy, Kuntal;Bandyopadhyay, Supriyo;Atulasimha, Jayasimha;
7:4:9:7     Magnetoelectric Control of Superparamagnetism
DOI:10.1021/nl3034637  JN:NANO LETTERS  PY:2013
  TC:20  AU: Kim, Hyungsuk K. D.;Schelhas, Laura T.;Keller, Scott;Hockel, Joshua L.;Tolbert, Sarah H.;Carman, Gregory P.;
7:4:9:8     Bennett clocking of nanomagnetic logic using multiferroic single-domain nanomagnets
DOI:10.1063/1.3506690  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:28  AU: Atulasimha, J.;Bandyopadhyay, S.;
7:4:9:9     Magnetization dynamics, Bennett clocking and associated energy dissipation in multiferroic logic
DOI:10.1088/0957-4484/22/15/155201  JN:NANOTECHNOLOGY  PY:2011
  TC:22  AU: Fashami, Mohammad Salehi;Roy, Kuntal;Atulasimha, Jayasimha;Bandyopadhyay, Supriyo;
7:4:9:10     Room temperature magnetoelectric memory cell using stress-mediated magnetoelastic switching in nanostructured multilayers
DOI:10.1063/1.3660259  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:20  AU: Tiercelin, Nicolas;Dusch, Yannick;Klimov, Alexey;Giordano, Stefano;Preobrazhensky, Vladimir;Pernod, Philippe;
7:4:9:11     Acoustically assisted spin-transfer-torque switching of nanomagnets: An energy-efficient hybrid writing scheme for non-volatile memory
DOI:10.1063/1.4838661  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Biswas, Ayan K.;Bandyopadhyay, Supriyo;Atulasimha, Jayasimha;
7:4:9:12     Electrical control of a single magnetoelastic domain structure on a clamped piezoelectric thin film-analysis
DOI:10.1063/1.4896549  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Liang, Cheng-Yen;Keller, Scott M.;Sepulveda, Abdon E.;Sun, Wei-Yang;Cui, Jizhai;Lynch, Christopher S.;Carman, Gregory P.;
7:4:9:13     Ultra-low-energy non-volatile straintronic computing using single multiferroic composites
DOI:10.1063/1.4826688  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Roy, Kuntal;
7:4:9:14     Voltage induced magnetostrictive switching of nanomagnets: Strain assisted strain transfer torque random access memory
DOI:10.1063/1.4884419  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Khan, Asif;Nikonov, Dmitri E.;Manipatruni, Sasikanth;Ghani, Tahir;Young, Ian A.;
7:4:9:15     Complete magnetization reversal in a magnetostrictive nanomagnet with voltage-generated stress: A reliable energy-efficient non-volatile magneto-elastic memory
DOI:10.1063/1.4893617  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Biswas, Ayan K.;Bandyopadhyay, Supriyo;Atulasimha, Jayasimha;
7:4:9:16     Sub-coercive and multi-level ferroelastic remnant states with resistive readout
DOI:10.1063/1.4883375  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kundys, B.;Iurchuk, V.;Meny, C.;Majjad, H.;Doudin, B.;
7:4:9:17     Critical analysis and remedy of switching failures in straintronic logic using Bennett clocking in the presence of thermal fluctuations
DOI:10.1063/1.4858484  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Roy, Kuntal;
7:4:9:18     Benchmarking spintronic logic devices based on magnetoelectric oxides
DOI:10.1557/jmr.2014.243  JN:JOURNAL OF MATERIALS RESEARCH  PY:2014
  TC:0  AU: Nikonov, Dmitri E.;Young, Ian A.;
7:4:9:19     Resistive switching via the converse magnetoelectric effect in ferromagnetic multilayers on ferroelectric substrates
DOI:10.1088/0957-4484/21/47/475202  JN:NANOTECHNOLOGY  PY:2010
  TC:27  AU: Pertsev, N. A.;Kohlstedt, H.;
7:4:9:20     Modeling of magnetoelastic nanostructures with a fully coupled mechanical-micromagnetic model
DOI:10.1088/0957-4484/25/43/435701  JN:NANOTECHNOLOGY  PY:2014
  TC:4  AU: Liang, Cheng-Yen;Keller, Scott M.;Sepulveda, Abdon E.;Bur, Alexandre;Sun, Wei-Yang;Wetzlar, Kyle;Carman, Gregory P.;
7:4:9:21     Energy-efficient magnetoelastic non-volatile memory
DOI:10.1063/1.4882276  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Biswas, Ayan K.;Bandyopadhyay, Supriyo;Atulasimha, Jayasimha;
7:4:9:22     The incorporation of the Cauchy stress matrix tensor in micromagnetic simulations
DOI:10.1063/1.3489969  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Dean, J.;Bryan, M. T.;Hrkac, G.;Goncharov, A.;Freeman, C. L.;Bashir, M. A.;Schrefl, T.;Allwood, D. A.;
7:4:9:23     Switching Magnetization by 180 degrees with an Electric Field
DOI:10.1103/PhysRevLett.108.197206  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:12  AU: Fechner, M.;Zahn, P.;Ostanin, S.;Bibes, M.;Mertig, I.;
7:4:9:24     Strain-mediated electric-field control of multiferroic domain structures in ferromagnetic films
DOI:10.1063/1.4795938  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Pertsev, N. A.;
7:4:9:25     Strain-induced magnetization change in patterned ferromagnetic nickel nanostructures
DOI:10.1063/1.3592344  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Bur, Alexandre;Wu, Tao;Hockel, Joshua;Hsu, Chin-Jui;Kim, Hyungsuk K. D.;Chung, Tien-Kan;Wong, Kin;Wang, Kang L.;Carman, Gregory P.;
7:4:9:26     Stress-mediated magnetoelectric memory effect with uni-axial TbCo2/FeCo multilayer on 011-cut PMN-PT ferroelectric relaxor
DOI:10.1063/1.4795440  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Dusch, Yannick;Tiercelin, Nicolas;Klimov, Alexey;Giordano, Stefano;Preobrazhensky, Vladimir;Pernod, Philippe;
7:4:9:27     Opposites attract: nanomagnetism in theory and practice
DOI:10.1088/0957-4484/23/39/390201  JN:NANOTECHNOLOGY  PY:2012
  TC:2  AU: Demming, Anna;
7:4:9:28     Magnetization dynamics, throughput and energy dissipation in a universal multiferroic nanomagnetic logic gate with fan-in and fan-out
DOI:10.1088/0957-4484/23/10/105201  JN:NANOTECHNOLOGY  PY:2012
  TC:8  AU: Fashami, Mohammad Salehi;Atulasimha, Jayasimha;Bandyopadhyay, Supriyo;
7:4:9:29     Light controlled magnetoresistance and magnetic field controlled photoresistance in CoFe film deposited on BiFeO3
DOI:10.1063/1.4731201  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Kundys, B.;Meny, C.;Gibbs, M. R. J.;Da Costa, V.;Viret, M.;Acosta, M.;Colson, D.;Doudin, B.;
7:4:9:30     Magnetoelectric memory using orthogonal magnetization states and magnetoelastic switching
DOI:10.1063/1.3559532  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Tiercelin, Nicolas;Dusch, Yannick;Preobrazhensky, Vladimir;Pernod, Philippe;
7:4:9:31     Variation and sign change of magnetostrictive strain as a function of Ni concentration in Ni-substituted ZnFe2O4 sintered nanoparticles
DOI:10.1063/1.3699193  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Adhikari, R.;Sarkar, A.;Limaye, Mukta V.;Kulkarni, S. K.;Das, A. K.;
7:4:9:32     Comment on "Ultra-low-energy non-volatile straintronic computing using single multiferroic composites" [Appl. Phys. Lett. 103, 173110 (2013)]
DOI:10.1063/1.4900882  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Bandyopadhyay, Supriyo;Atulasimha, Jayasimha;
7:4:9:33     Multiferroic composites for magnetic data storage beyond the super-paramagnetic limit
DOI:10.1063/1.4896129  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Vopson, M. M.;Zemaityte, E.;Spreitzer, M.;Namvar, E.;
7:4:9:34     Straintronics-based magnetic tunneling junction: Dynamic and static behavior analysis and material investigation
DOI:10.1063/1.4873128  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Barangi, Mahmood;Mazumder, Pinaki;
7:4:9:35     Investigation of temperature-dependent polarization, dielectric, and magnetization behavior of multiferroic layered nanostructure
DOI:10.1016/j.tsf.2010.08.101  JN:THIN SOLID FILMS  PY:2010
  TC:2  AU: Ortega, N.;Kumar, Ashok;Katiyar, Ram S.;Rinaldi, Carlos;
7:4:10:1     Multiplied magnetoelectric effect in multi-faceted magnetoelectric composite
DOI:10.1063/1.4863056  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Zuo, Z. J.;Pan, D. A.;Lu, J.;Zhang, S. G.;Tian, J. J.;Qiao, L. J.;Volinsky, A. A.;
7:4:10:2     Closed magnetic circuit FeGa/BaTiO3/FeGa sandwich structure for high magnetoelectric effect
DOI:10.1016/j.jallcom.2013.11.023  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Du, Zhaofu;Zhang, Sam;He, Chunlin;Ding, Hui;Zhao, Dongliang;
7:4:10:3     Large magnetoelectric effect and resonance frequency controllable characteristics in Ni-lead zirconium titanate-Ni cylindrical layered composites
DOI:10.1016/j.jallcom.2011.02.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:21  AU: Bi, K.;Wu, W.;Gu, Q. L.;Cui, H. N.;Wang, Y. G.;
7:4:10:4     Magnetoelectric performance in Ni/Pb(Zr,Ti)O-3/FeCo trilayered cylindrical composites
DOI:10.1016/j.jallcom.2012.08.048  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:12  AU: Hong, H.;Bi, K.;Wang, Y. G.;
7:4:10:5     Enhanced magnetoelectric properties of Terfenol-D disk/Pb(Zr,Ti)O-3 ring multiferroic heterostructures with Pb(Zr,Ti)O-3 piezoelectric ring poled radially
DOI:10.1016/j.jallcom.2012.02.113  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:10  AU: Li, Lei;Chen, Xiang Ming;Zhu, Hai Yan;
7:4:10:6     Additional magnetoelectric effect in electrode-arrayed magnetoelectric composite
DOI:10.1063/1.4901564  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Pan, D. A.;Zuo, Z. J.;Zhang, S. G.;Liu, B.;Qiao, L. J.;Volinsky, A. A.;
7:4:10:7     Length dependence of the resonant magnetoelectric effect in Ni/Pb(Zr,Ti)O-3/Ni long cylindrical composites
DOI:10.1016/j.jallcom.2014.06.208  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Xie, D.;Wang, Y. G.;Cheng, J. H.;
7:4:10:8     Resonance magnetoelectric effects in disk-ring (piezoelectric - magnetostrictive) composite structure
DOI:10.1063/1.3670018  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Wu, Gaojian;Zhang, Ru;Li, Xin;Zhang, Ning;
7:4:10:9     Resonance magnetoelectric effect in Ni/Pb(Zr,Ti)O-3/Terfenol-D trilayered composites with different mechanical boundary conditions
DOI:10.1063/1.4885515  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Cheng, J. H.;Wang, G.;Xie, D.;
7:4:10:10     Controlled synthesis of PbWO4 dendrites by a simple sonochemical method
DOI:10.1016/j.jallcom.2012.11.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Wang, Yonggang;Yang, Linlin;Wang, Yujiang;Wang, Xiaofeng;Han, Gaorong;
7:4:10:11     Enhanced magnetoelectric effect in magnetostrictive/piezoelectric laminates through adopting magnetic warm compaction Terfenol-D
DOI:10.1016/j.jallcom.2013.10.186  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Zuo, Zhijun;Pan, Dean;Jia, Yanmin;Tian, Jianjun;Zhang, Shengen;Qiao, Lijie;
7:4:10:12     Magnetoelectric effect in FeCo/PMN-PT/FeCo trilayers prepared by electroless deposition of FeCo on PMN-PT crystals with various orientations
DOI:10.1016/j.jallcom.2014.04.221  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Shen, H. Q.;Wang, Y. G.;Xie, D.;Cheng, J. H.;
7:4:10:13     Giant resonant magnetoelectric effect in bi-layered Metglas/Pb(Zr,Ti)O-3 composites
DOI:10.1063/1.4765724  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Gao, Junqi;Hasanyan, Davresh;Shen, Ying;Wang, Yaojin;Li, Jiefang;Viehland, D.;
7:4:10:14     Tuning electromechanical resonances in strip-ring magnetoelectric composites structure with dc magnetic field
DOI:10.1063/1.4817735  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Wang Wei;Xu XiaoXiao;Zhou LiSheng;Luo Xiao Bin;Zhang Ning;
7:4:10:15     Single dc magnetic field tunable electromechanical resonance in Terfenol-D/PZT/Terfenol-D trilayer composites
DOI:10.1016/j.jmmm.2014.04.062  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Wang Wei;Ye JingJing;Wu Jie;Zhou LiSheng;Luo Xiao Bin;Zhang Ning;
7:4:10:16     Influence of magnetic fields on the mechanical loss of Terfenol-D/PbZr0.52Ti0.48O3/Terfenol-D laminated composites
DOI:10.1016/j.jallcom.2011.03.184  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:12  AU: Yao, Yiping;Hou, Ying;Dong, Sining;Huang, Xiaohua;Yu, Qingxuan;Li, Xiaoguang;
7:4:10:17     Peak divergence in the curve of magnetoelectric coefficient versus dc bias magnetic field at resonance region for bi-layer magnetostrictive/piezoelectric composites
DOI:10.1063/1.4856355  JN:AIP ADVANCES  PY:2013
  TC:6  AU: Zuo, Z. J.;Pan, D. A.;Jia, Y. M.;Zhang, S. G.;Qiao, L. J.;
7:4:10:18     Resonant modes and magnetoelectric performance of PZT/Ni cylindrical layered composites
DOI:10.1007/s00339-009-5419-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:16  AU: Pan, D. A.;Zhang, S. G.;Tian, J. J.;Sun, J. S.;Volinsky, A. A.;Qiao, L. J.;
7:4:10:19     Enhanced magnetoelectric effect in ferromagnetic-elastic-piezoelectric composites
DOI:10.1016/j.jallcom.2014.06.035  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Zhang, Yuan;Liu, Guoxi;Shi, Huaduo;Xiao, Wenlei;Zhu, Yongdan;Li, Muzi;Li, Meiya;Liu, Jun;
7:4:10:20     Large magnetoelectric effect in negative magnetostrictive/piezoelectric/positive magnetostrictive laminate composites with two resonance frequencies
DOI:10.1016/j.scriptamat.2010.06.003  JN:SCRIPTA MATERIALIA  PY:2010
  TC:17  AU: Bi, K.;Wang, Y. G.;Pan, D. A.;Wu, W.;
7:4:10:21     Terfenol-D/Pb(Zr,Ti)O-3 Disk-Ring Multiferroic Heterostructures Coupled Through Normal Stresses
DOI:10.1007/s00339-010-5544-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:11  AU: Li, Lei;Chen, Xiang Ming;
7:4:10:22     Giant resonance frequency tunable magnetoelectric effect in a device of Pb(Zr0.52Ti0.48)O-3 drum transducer, NdFeB magnet, and Fe-core solenoid
DOI:10.1063/1.3428429  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Zeng, Min;Or, Siu Wing;Chan, Helen Lai Wa;
7:4:10:23     Large magnetoelectric effect in mechanically mediated structure of TbFe2, Pb(Zr, Ti)O-3, and nonmagnetic flakes
DOI:10.1063/1.3574004  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Bi, K.;Wang, Y. G.;Pan, D. A.;Wu, W.;
7:4:10:24     Enhancing magnetic field sensitivity and giant converse magnetoelectric effect in laminate composite of Terfenol-D and multilayer piezoelectric vibrator
DOI:10.1016/j.jallcom.2013.12.065  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Zhang, Sai-Huan;Zhou, Jian-Ping;Shi, Zhan;Liu, Peng;Deng, Chao-Yong;
7:4:10:25     Resonance magnetoelectric effect in radially polarized long cylindrical composite structures
DOI:10.1063/1.4808443  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Wu, Gaojian;Zhang, Ru;Zhang, Li;Zhu, Honghu;Zhang, Ning;
7:4:10:26     Effect of Ni and FeCoV films on magnetoelectricity of piezoelectric Pb(Mg1/3Nb2/3)O-3-PbTiO3 sandwich structures
DOI:10.1016/j.tsf.2013.03.114  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Du, Zhaofu;Zhang, Sam;Wang, Lei;Zhao, Dongliang;
7:4:10:27     Ring-type electric current sensor based on ring-shaped magnetoelectric laminate of epoxy-bonded Tb0.3Dy0.7Fe1.92 short-fiber/NdFeB magnet magnetostrictive composite and Pb(Zr, Ti)O-3 piezoelectric ceramic
DOI:10.1063/1.3360349  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:15  AU: Leung, Chung Ming;Or, Siu Wing;Zhang, Shengyao;Ho, S. L.;
7:4:10:28     Magnetoelectric performance of cylindrical Ni-lead zirconate titanate-Ni laminated composite synthesized by electroless deposition
DOI:10.1007/s10853-010-4971-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:8  AU: Wu, W.;Bi, K.;Wang, Y. G.;
7:4:10:29     Wide magnetic field range of Ni-P/PZT/Ni-P cylindrical layered magnetoelectric composites
DOI:10.1063/1.4868415  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Pan, D. A.;Wang, J.;Zuo, Z. J.;Zhang, S. G.;Qiao, L. J.;Volinsky, A. A.;
7:4:10:30     Resonance magnetoelectric interactions in an asymmetric ferromagnetic-ferroelectric layered structure
DOI:10.1063/1.3553640  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Fetisov, L. Y.;Perov, N. S.;Fetisov, Y. K.;Srinivasan, G.;Petrov, V. M.;
7:4:10:31     Bath temperature effect on magnetoelectric performance of Ni-lead zirconate titanate-Ni laminated composites synthesized by electroless deposition
DOI:10.1016/j.jmmm.2010.09.034  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:7  AU: Wu, W.;Wang, Y. G.;Bi, K.;
7:4:10:32     Frequency response of magnetoelectric effect in piezoelectric-magnetostrictive disk-ring composite structures
DOI:10.1016/j.jmmm.2012.03.056  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:5  AU: Zhang, Ru;Wu, Gaojian;Zhang, Li;Li, Xin;Zhang, Ning;
7:4:10:33     Magnetoelectric effect in a bi-rectangular structure composed of negative/positive magnetostrictive and piezoelectric flakes
DOI:10.1557/jmr.2011.258  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:1  AU: Bi, Ke;Wang, Yin-gang;Pan, De-an;Wu, Wei;
7:4:10:34     Improved magnetoelectric performance of the Ni-P/Ni/Pb(Zr,TiO)(3) cylindrical layered composites
DOI:10.1063/1.4895065  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Pan, D. A.;Wang, J.;Zuo, Z. J.;Zhang, S. G.;Liu, B.;Volinsky, A. A.;Qiao, L. J.;
7:4:10:35     Giant magnetoelectric effect in mechanically mediated composite structure of TbFe2 alloy and Pb(Zr,Ti)O-3 ceramics
DOI:10.1063/1.4795596  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Bi, K.;Zhou, J.;Wu, W.;Hong, H.;
7:4:10:36     Phosphorus content effect on the magnetoelectric properties of the Ni-P(Ni)/PZT/Ni-P(Ni) cylindrical layered composites
DOI:10.1016/j.matlet.2014.07.047  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Pan, De'an;Wang, Jiao;Zuo, Zhijun;Zhang, Shengen;Liu, Bo;Volinsky, Alex A.;Qiao, Lijie;
7:4:10:37     Magnetoelectric properties of Tb0.27-xDy0.73-y Y(x+y)Fe2/PVDF composites
DOI:10.1016/j.jallcom.2012.08.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:10  AU: Szklarska-Lukasik, M.;Guzdek, P.;Dudek, M.;Pawlaczyk, A.;Chmist, J.;Dorowski, W.;Pszczola, J.;
7:4:10:38     Magnetoelectric coupling in multiferroic heterostructure of rf-sputtered Ni-Mn-Ga thin film on PMN-PT
DOI:10.1016/j.jmmm.2012.01.010  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:6  AU: Teferi, M. Y.;Amaral, V. S.;Lounrenco, A. C.;Das, S.;Amaral, J. S.;Karpinsky, D. V.;Soares, N.;Sobolev, N. A.;Kholkin, A. L.;Tavares, P. B.;
7:4:10:39     Hydrothermal temperature effect on magnetoelectric coupling of Ni/Pb(Zr0.52Ti0.48)O-3 bilayers
DOI:10.1016/j.tsf.2012.04.043  JN:THIN SOLID FILMS  PY:2012
  TC:2  AU: Bi, K.;He, Z. L.;Wang, Y. G.;
7:4:10:40     Giant magnetoelectric effect in magnet-cymbal-solenoid current-to-voltage conversion device
DOI:10.1063/1.3372759  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Zeng, Min;Or, Siu Wing;Chan, Helen Lai Wa;
7:4:11:1     An Extremely Low Equivalent Magnetic Noise Magnetoelectric Sensor
DOI:10.1002/adma.201100773  JN:ADVANCED MATERIALS  PY:2011
  TC:83  AU: Wang, Yaojin;Gray, David;Berry, David;Gao, Junqi;Li, Menghui;Li, Jiefang;Viehland, Dwight;
7:4:11:2     A uniform model for direct and converse magnetoelectric effect in laminated composite
DOI:10.1063/1.4878559  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Zhou, Jian-Ping;Ma, Yuan-Jun;Zhang, Guang-Bin;Chen, Xiao-Ming;
7:4:11:3     Influence of interfacial bonding condition on magnetoelectric properties in piezofiber/Metglas heterostructures
DOI:10.1016/j.jallcom.2011.10.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:17  AU: Wang, Yaojin;Gray, David;Berry, David;Li, Menghui;Gao, Junqi;Li, Jiefang;Viehland, D.;
7:4:11:4     Nonlinear magnetoelectric response of a Metglas/piezofiber laminate to a high-frequency bipolar AC magnetic field
DOI:10.1063/1.4795307  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Wang, Yaojin;Shen, Ying;Gao, Junqi;Li, Menghui;Li, Jiefang;Viehland, D.;
7:4:11:5     Giant magnetoelectric effect in self-biased laminates under zero magnetic field
DOI:10.1063/1.4794056  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Li, Menghui;Wang, Zhiguang;Wang, Yaojin;Li, Jiefang;Viehland, D.;
7:4:11:6     Shear-mode magnetostrictive/piezoelectric composite with an enhanced magnetoelectric coefficient
DOI:10.1063/1.4718352  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Wang, Yaojin;Hasanyan, D.;Li, Jiefang;Viehland, D.;Luo, Haosu;
7:4:11:7     Enhanced magnetoelectric effect in self-stressed multi-push-pull mode Metglas/Pb(Zr,Ti)O-3/Metglas laminates
DOI:10.1063/1.4737179  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:11  AU: Li, Menghui;Wang, Yaojin;Gao, Junqi;Li, Jiefang;Viehland, D.;
7:4:11:8     Enhanced Sensitivity and Reduced Noise Floor in Magnetoelectric Laminate Sensors by an Improved Lamination Process
DOI:10.1111/j.1551-2916.2011.04659.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:17  AU: Li, Menghui;Berry, David;Das, Jaydip;Gray, David;Li, Jiefang;Viehland, Dwight;
7:4:11:9     Improvement of magnetoelectric properties in Metglas/Pb(Mg1/3Nb2/3)O-3-PbTiO3 laminates by poling optimization
DOI:10.1016/j.jallcom.2011.12.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Wang, Yaojin;Gray, David;Gao, Junqi;Berry, David;Li, Menghui;Li, Jiefang;Viehland, D.;Luo, Haosu;
7:4:11:10     Giant converse magnetoelectric effect in multi-push-pull mode Metglas/Pb(Zr,Ti)O-3/Metglas laminates
DOI:10.1063/1.3698114  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Li, Menghui;Wang, Yaojin;Hasanyan, Davresh;Li, Jiefang;Viehland, D.;
7:4:11:11     Stress reconfigurable tunable magnetoelectric resonators as magnetic sensors
DOI:10.1063/1.4789500  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Kiser, Jillian;Finkel, Peter;Gao, Junqi;Dolabdjian, Christophe;Li, Jiefang;Viehland, D.;
7:4:11:12     Enhanced resonant magnetoelectric coupling in frequency-tunable composite multiferroic bimorph structures
DOI:10.1063/1.3560055  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Finkel, P.;Bonini, J.;Garrity, E.;Bussman, K.;Gao, J.;Li, J. F.;Lofland, S. E.;Viehland, D.;
7:4:11:13     Giant phase shift effect in Tb0.3Dy0.7Fe2/Pb(Zr,Ti)O-3 laminated composite
DOI:10.1063/1.4795870  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Shi, Zhan;Chen, Laizhu;Tong, Yongshuai;Xue, Hao;Yang, Shuiyuan;Wang, Cuiping;Liu, Xingjun;
7:4:11:14     Ultralow equivalent magnetic noise in a magnetoelectric Metglas/Mn-doped Pb(Mg1/3Nb2/3)O-3-PbTiO3 heterostructure
DOI:10.1063/1.4733963  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Wang, Yaojin;Gao, Junqi;Li, Menghui;Hasanyan, D.;Shen, Ying;Li, Jiefang;Viehland, D.;Luo, Haosu;
7:4:11:15     Thermal stability of magnetoelectric sensors
DOI:10.1063/1.4705298  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Shen, Ying;Gao, Junqi;Wang, Yaojin;Li, Jiefang;Viehland, Dwight;
7:4:11:16     Electrocaloric effect on graphenes
DOI:10.1063/1.4795863  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Reis, M. S.;Soriano, S.;
7:4:11:17     Frequency conversion in magnetoelectric composites for quasi-static magnetic field detection
DOI:10.1063/1.4832861  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Liu, Yuting;Jiao, Jie;Ma, Jiashuai;Ren, Bo;Li, Lingying;Zhao, Xiangyong;Luo, Haosu;Shi, Ling;
7:4:11:18     Magnetoelectric effect of the multi-push-pull mode in 0.35Pb(In1/2Nb1/2)O-3-0.35Pb(Mg1/3Nb2/3)O-3-0.30PbTiO(3)/Metglas magnetoelectric composite
DOI:10.1063/1.4812221  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Li, Lingying;Jiao, Jie;Chen, Jianwei;Liu, Yuting;Xu, Chundong;Ren, Bo;Di, Wenning;Zhao, Xiangyong;Luo, Haosu;Jing, Weiping;Shao, Xiumei;Fang, Jiaxiong;
7:4:11:19     A pencil-like magnetoelectric sensor exhibiting ultrahigh coupling properties
DOI:10.1063/1.4798509  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Lin, Lizhi;Li, Yingwei;Soh, Ai-Kah;Li, Faxin;
7:4:11:20     Dependence of magnetic field sensitivity of a magnetoelectric laminate sensor pair on separation distance: Effect of mutual inductance
DOI:10.1063/1.3684986  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Li, Menghui;Wang, Yaojin;Gao, Junqi;Gray, David;Li, Jiefang;Viehland, D.;
7:4:11:21     The theoretical ultimate magnetoelectric coefficients of magnetoelectric composites by optimization design
DOI:10.1063/1.4868516  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Wang, H. -L.;Liu, B.;
7:4:11:22     An improved magnetic field detection unit based on length-magnetized Terfenol-D and width-polarized ternary 0.35Pb(In1/2Nb1/2)O-3-0.35Pb (Mg1/3Nb2/3)O-3-0.30PbTiO(3)
DOI:10.1063/1.4769904  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Jiao, Jie;Wang, Wei;Li, Lingying;Liu, Yuting;Ren, Bo;Deng, Hao;Chen, Jianwei;Xu, Chundong;Di, Wenning;Zhao, Xiangyong;Luo, Haosu;Jing, Weiping;
7:4:11:23     Piezoelectric single crystal and magnetostrictive Metglas composites: Linear and nonlinear magnetoelectric coupling
DOI:10.1063/1.4871101  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wang, Yaojin;Finkel, P.;Li, Jiefang;Viehland, D.;
7:4:11:24     Modeling of resonant magneto-electric effect in a magnetostrictive and piezoelectric laminate composite structure coupled by a bonding material
DOI:10.1063/1.4752271  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Hasanyan, D.;Wang, Y.;Gao, J.;Li, M.;Shen, Y.;Li, J.;Viehland, D.;
7:4:11:25     Structural dependence of nonlinear magnetoelectric effect for magnetic field detection by frequency modulation
DOI:10.1063/1.4824377  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Li, Menghui;Wang, Yaojin;Shen, Ying;Gao, Junqi;Li, Jiefang;Viehland, D.;
7:4:11:26     Enhanced dc magnetic field sensitivity by improved flux concentration in magnetoelectric laminates
DOI:10.1063/1.3650713  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Gao, Junqi;Gray, David;Shen, Ying;Li, Jiefang;Viehland, D.;
7:4:11:27     Geometry-induced magnetoelectric effect enhancement and noise floor reduction in Metglas/piezofiber sensors
DOI:10.1063/1.4737906  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Wang, Yaojin;Li, Menghui;Hasanyan, D.;Gao, Junqi;Li, Jiefang;Viehland, D.;
7:4:11:28     Magnetostrictive stress reconfigurable thin film resonators for near direct current magnetoelectric sensors
DOI:10.1063/1.4866044  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kiser, Jillian;Lacomb, Ron;Bussmann, Konrad;Hawley, Christopher J.;Spanier, Jonathan E.;Zhuang, Xin;Dolabdjian, Christophe;Lofland, Sam;Finkel, Peter;
7:4:11:29     Enhancement in magnetic field sensitivity and reduction in equivalent magnetic noise by magnetoelectric laminate stacks
DOI:10.1063/1.4718441  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Li, Menghui;Gao, Junqi;Wang, Yaojin;Gray, David;Li, Jiefang;Viehland, D.;
7:4:11:30     Mechanical loss and magnetoelectric response in magnetostrictive/interdigitated-electrode/piezoelectric laminated resonators
DOI:10.1063/1.4798300  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Wang, Yaojin;Finkel, P.;Li, Jiefang;Viehland, D.;
7:4:11:31     Quasi-static (f < 10(-2) Hz) frequency response of magnetoelectric composites based magnetic sensor
DOI:10.1016/j.matlet.2012.06.100  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: Gao, Junqi;Wang, Yaojin;Li, Menghui;Shen, Ying;Li, Jiefang;Viehland, D.;
7:4:11:32     Flux distraction effect on magnetoelectric laminate sensors and gradiometer
DOI:10.1063/1.4824184  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Shen, Ying;Gao, Junqi;Wang, Yaojin;Hasanyan, Davresh;Finkel, Peter;Li, Jiefang;Viehland, D.;
7:4:11:33     Parallel multilayer magnetoelectric composite based on (1-x)Pb(Mg1/3Nb2/3)-xPbTiO(3) and Terfenol-D coupled with charge mode amplifier
DOI:10.1063/1.3681818  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Jiao, Jie;Li, Lingying;Ren, Bo;Guo, Hao;Deng, Hao;Di, Wenning;Zhao, Xiangyong;Jing, Weiping;Luo, Haosu;
7:4:11:34     Effective optimization of magnetic noise for a Metglas/Pb(Zr,Ti)O-3 magnetoelectric sensor array in an open environment
DOI:10.1016/j.matlet.2012.10.003  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Shen, Ying;McLaughlin, Keith. L.;Gao, Junqi;Li, Menghui;Li, Jiefang;Viehland, D.;
7:4:11:35     Bending Resonance in a Magnetostrictive-Piezoelectric Bilayer and Magnetoelectric Interactions
DOI:10.1080/10584587.2011.575010  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:3  AU: Sreenivasulu, G.;Mandal, S. K.;Petrov, V. M.;Mukundan, A.;Rengesh, S.;Srinivasan, G.;
7:4:12:1     Selectable Spontaneous Polarization Direction and Magnetic Anisotropy in BiFeO3-CoFe2O4 Epitaxial Nanostructures
DOI:10.1021/nn101546r  JN:ACS NANO  PY:2010
  TC:32  AU: Dix, Nico;Muralidharan, Rajaram;Rebled, Jose-Manuel;Estrade, Sonia;Peiro, Francesca;Varela, Manuel;Fontcuberta, Josep;Sanchez, Florencio;
7:4:12:2     Deposition of epitaxial BiFeO3/CoFe2O4 nanocomposites on (001) SrTiO3 by combinatorial pulsed laser deposition
DOI:10.1063/1.3690957  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:26  AU: Aimon, Nicolas M.;Kim, Dong Hun;Choi, Hong Kyoon;Ross, C. A.;
7:4:12:3     Directed Self-Assembly of Epitaxial CoFe2O4-BiFeO3 Multiferroic Nanocomposites
DOI:10.1021/nl3003396  JN:NANO LETTERS  PY:2012
  TC:28  AU: Comes, Ryan;Liu, Hongxue;Kholchov, Mikhail;Kasica, Richard;Lu, Jiwei;Wolf, Stuart A.;
7:4:12:4     Magnetoelectric Coupling in Ordered Arrays of Multilayered Heteroepitaxial BaTiO3/CoFe2O4 Nanodots
DOI:10.1021/nl201443h  JN:NANO LETTERS  PY:2011
  TC:32  AU: Lu, Xiaoli;Kim, Yunseok;Goetze, Silvana;Li, Xiaoguang;Dong, Sining;Werner, Peter;Alexe, Marin;Hesse, Dietrich;
7:4:12:5     Misorientation Control and Functionality Design of Nanopillars in Self-Assembled Perovskite-Spinel Heteroepitaxial Nanostructures
DOI:10.1021/nn200880t  JN:ACS NANO  PY:2011
  TC:22  AU: Liao, Sheng-Chieh;Tsai, Pei-Yu;Liang, Chen-Wei;Liu, Heng-Jui;Yang, Jan-Chi;Lin, Su-Jien;Lai, Chih-Huang;Chu, Ying-Hao;
7:4:12:6     Adjustable magnetoelectric effect of self-assembled vertical multiferroic nanocomposite films by the in-plane misfit strain and ferromagnetic volume fraction
DOI:10.1063/1.4868896  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Wu, Huaping;Chai, Guozhong;Zhou, Ting;Zhang, Zheng;Kitamura, Takayuki;Zhou, Haomiao;
7:4:12:7     Magnetoelectric and multiferroic properties of variously oriented epitaxial BiFeO3-CoFe2O4 nanostructured thin films
DOI:10.1063/1.3359650  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:25  AU: Yan, Li;Wang, Zhiguang;Xing, Zengping;Li, Jiefang;Viehland, D.;
7:4:12:8     Compositionally Modulated Magnetic Epitaxial Spinel/Perovskite Nanocomposite Thin Films
DOI:10.1002/adfm.201302844  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:10  AU: Kim, Dong Hun;Aimon, Nicolas M.;Sun, Xueyin;Ross, Caroline A.;
7:4:12:9     Hierarchical Templating of a BiFeO3-CoFe2O4 Multiferroic Nanocomposite by a Triblock Terpolymer Film
DOI:10.1021/nn503100s  JN:ACS NANO  PY:2014
  TC:1  AU: Choi, Hong Kyoon;Aimon, Nicolas M.;Kim, Dong Hun;Sun, Xue Yin;Gwyther, Jessica;Manners, Ian;Ross, Caroline A.;
7:4:12:10     Templated Self-Assembly of Functional Oxide Nanocomposites
DOI:10.1002/adma.201305459  JN:ADVANCED MATERIALS  PY:2014
  TC:6  AU: Aimon, Nicolas M.;Choi, Hong Kyoon;Sun, Xue Yin;Kim, Dong Hun;Ross, Caroline A.;
7:4:12:11     Quantitative determination of anisotropic magnetoelectric coupling in BiFeO3-CoFe2O4 nanostructures
DOI:10.1063/1.3475420  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:19  AU: Oh, Yoon Seok;Crane, S.;Zheng, H.;Chu, Y. H.;Ramesh, R.;Kim, Kee Hoon;
7:4:12:12     Local probing of magnetoelectric coupling and magnetoelastic control of switching in BiFeO3-CoFe2O4 thin-film nanocomposite
DOI:10.1063/1.4816793  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Yan, Feng;Chen, Guannan;Lu, Li;Finkel, Peter;Spanier, Jonathan E.;
7:4:12:13     Pillar shape modulation in epitaxial BiFeO3-CoFe2O4 vertical nanocomposite films
DOI:10.1063/1.4892695  JN:APL MATERIALS  PY:2014
  TC:0  AU: Kim, Dong Hun;Aimon, Nicolas M.;Ross, C. A.;
7:4:12:14     Thin Film Multiferroic Nanocomposites by Ion Implantation
DOI:10.1021/am404945m  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Alguero, Miguel;Ricote, Jesus;Torres, Maria;Amorin, Harvey;Alberca, Aurora;Iglesias-Freire, Oscar;Nemes, Norbert;Holgado, Susana;Cervera, Manuel;Piqueras, Juan;Asenjo, Agustina;Garcia-Hernandez, Mar;
7:4:12:15     Effects of film thickness and mismatch strains on magnetoelectric coupling in vertical heteroepitaxial nanocomposite thin films
DOI:10.1063/1.3583599  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Chen, H. T.;Hong, L.;Soh, A. K.;
7:4:12:16     Nucleation-Induced Self-Assembly of Multiferroic BiFeO3-CoFe2O4 Nanocomposites
DOI:10.1021/nl401965z  JN:NANO LETTERS  PY:2013
  TC:10  AU: Stratulat, Sergiu M.;Lu, Xiaoli;Morelli, Alessio;Hesse, Dietrich;Erfurth, Wilfried;Alexe, Marin;
7:4:12:17     Simulation of inhomogeneous magnetoelastic anisotropy in ferroelectric/ferromagnetic nanocomposites
DOI:10.1063/1.4768958  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Aimon, Nicolas M.;Liao, Jiexi;Ross, C. A.;
7:4:12:18     Magnetic anisotropy in composite CoFe2O4-BiFeO3 ultrathin films grown by pulsed-electron deposition
DOI:10.1063/1.3676413  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Comes, Ryan;Khokhlov, Mikhail;Liu, Hongxue;Lu, Jiwei;Wolf, Stuart A.;
7:4:12:19     Role of spinel substrate in the morphology of BiFeO3-CoFe2O4 epitaxial nanocomposite films
DOI:10.1063/1.3631777  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Stern, Ilan;He, Jibao;Zhou, Xiaolan;Silwal, Punam;Miao, Ludi;Vargas, Jose Marcelo;Spinu, Leonard;Kim, Dae Ho;
7:4:12:20     Self-assembled growth and magnetic properties of a BiFeO3-MgFe2O4 nanocomposite prepared by pulsed laser deposition
DOI:10.1063/1.4795327  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Kim, Dong Hun;Aimon, Nicolas M.;Ross, Caroline A.;
7:4:12:21     Sol-Gel-Derived Epitaxial Nanocomposite Thin Films with Large Sharp Magnetoelectric Effect
DOI:10.1021/nn101952q  JN:ACS NANO  PY:2010
  TC:13  AU: Liu, Bin;Sun, Tao;He, Jiaqing;Dravid, Vinayak P.;
7:4:12:22     Field dependency of magnetoelectric coupling in multilayered nanocomposite arrays: Possible contribution from surface spins
DOI:10.1063/1.4768290  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Lu, Xiaoli;Dong, Sining;Li, Xiaoguang;Alexe, Marin;Hesse, Dietrich;Hao, Yue;
7:4:12:23     Self-assembled perovskite-spinel heterostructure on a highly distorted substrate
DOI:10.1063/1.4796037  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Zhu, Y. M.;Ke, D.;Yu, R.;Hsieh, Y. H.;Liu, H. J.;Liu, P. P.;Chu, Y. H.;Zhan, Q.;
7:4:12:24     Understanding the formation of ultrafine spinel CoFe2O4 nanoplatelets and their magnetic properties
DOI:10.1063/1.4765033  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:15  AU: Liu, Wenchao;Chan, Yukkwan;Cai, Jinzhu;Leung, Chiwah;Mak, Cheeleung;Wong, Kinhung;Zhang, Fengming;Wu, Xiaoshan;Qi, X. D.;
7:4:12:25     Magnetic properties of CoFe2O4 nanoparticles distributed in a multiferroic BiFeO3 matrix
DOI:10.1063/1.4729831  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Sone, Keita;Sekiguchi, Sho;Naganuma, Hiroshi;Miyazaki, Takamichi;Nakajima, Takashi;Okamura, Soichiro;
7:4:12:26     Compositionally tunable three-dimensional nano-seeding assembly in Fe-LaSrFeO4 nanostructure
DOI:10.1063/1.4791756  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Okada, K.;Tanaka, H.;
7:4:13:1     Structural evolution induced by acceptor doping into BaTiO3 ceramics
DOI:10.1016/j.jallcom.2010.08.099  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:28  AU: Wei, X. K.;Zhang, Q. H.;Li, F. Y.;Jin, C. Q.;Yu, R. C.;
7:4:13:2     Decisive role of oxygen vacancy in ferroelectric versus ferromagnetic Mn-doped BaTiO3 thin films
DOI:10.1063/1.3576125  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:28  AU: Shuai, Yao;Zhou, Shengqiang;Buerger, Danilo;Reuther, Helfried;Skorupa, Ilona;John, Varun;Helm, Manfred;Schmidt, Heidemarie;
7:4:13:3     Structural phase separation and optical and magnetic properties of BaTi1-xMnxO3 multiferroics
DOI:10.1063/1.4725195  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Dang, N. V.;The-Long Phan;Thanh, T. D.;Lam, V. D.;Hong, L. V.;
7:4:13:4     Magnetoelectric coupling of multiferroic chromium doped barium titanate thin film probed by magneto-impedance spectroscopy
DOI:10.1063/1.4870263  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Shah, Jyoti;Kotnala, Ravinder K.;
7:4:13:5     Defect-induced magnetism: Test of dilute magnetism in Fe-doped hexagonal BaTiO3 single crystals
DOI:10.1103/PhysRevB.83.144407  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Chakraborty, Tanushree;Ray, Sugata;Itoh, Mitsuru;
7:4:13:6     Ferromagnetic antiphase domain boundary in Mn-doped hexagonal BaTiO3 multiferroics
DOI:10.1063/1.4811699  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Wei, Xian-Kui;Su, Yantao;Sui, Yu;Zhou, Zhongxiang;Yao, Yuan;Jin, Changqing;Yu, Richeng;
7:4:13:7     Origin of ferromagnetism and oxygen-vacancy ordering induced cross-controlled magnetoelectric effects at room temperature
DOI:10.1063/1.3696979  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Wei, X. K.;Zou, T.;Wang, F.;Zhang, Q. H.;Sun, Y.;Gu, L.;Hirata, A.;Chen, M. W.;Yao, Y.;Jin, C. Q.;Yu, R. C.;
7:4:13:8     Comprehensive examination of dopants and defects in BaTiO3 from first principles
DOI:10.1103/PhysRevB.87.134109  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Sharma, V.;Pilania, G.;Rossetti, G. A., Jr.;Slenes, K.;Ramprasad, R.;
7:4:13:9     Multiferroic properties in transition metals doped La2Ti2O7 ceramics
DOI:10.1016/j.jallcom.2014.05.039  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Gong, Gaoshang;Qiu, Yang;Zerihun, Gebru;Fang, Yujiao;Yin, Chongyang;Zhu, Changming;Huang, Shuai;Yuan, Songliu;
7:4:13:10     Origin of ferromagnetism in transition metal doped BaTiO3
DOI:10.1063/1.4807412  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Apostolova, I. N.;Apostolov, A. T.;Bahoosh, Safa Golrokh;Wesselinowa, Julia M.;
7:4:13:11     Tetragonal and hexagonal polymorphs of BaTi1-xFexO3-delta multiferroics using x-ray and Raman analyses
DOI:10.1063/1.3662389  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Nguyen, Ha M.;Dang, N. V.;Chuang, Pei-Yu;Thanh, T. D.;Hu, Chih-Wei;Chen, Tsan-Yao;Lam, V. D.;Lee, Chih-Hao;Hong, L. V.;
7:4:13:12     Cation Order-Disorder Transition in Fe-Doped 6H-BaTiO3 for Dilute Room-Temperature Ferromagnetism
DOI:10.1021/cm402353t  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:3  AU: Valant, Matjaz;Arcon, Iztok;Mikulska, Iuliia;Lisjak, Darja;
7:4:13:13     Structural, optical and magnetic properties of polycrystalline BaTi1-xFexO3 ceramics
DOI:10.1063/1.3625235  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Dang, N. V.;Thanh, T. D.;Hong, L. V.;Lam, V. D.;The-Long Phan;
7:4:13:14     Intrinsic magnetism in BaTiO3 with magnetic transition element dopants (Co, Cr, Fe) synthesized by sol-precipitation method
DOI:10.1063/1.3556768  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Liu, Hongxue;Cao, Baobao;O'Connor, Charles;
7:4:13:15     Diluted magnetic ferroelectric effect in BaTi0.9Hf0.05Co0.05O3 ceramic
DOI:10.1007/s00339-014-8350-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:2  AU: Das, S. K.;Mishra, R. N.;Roul, B. K.;
7:4:13:16     Structure, electrical and magnetic property investigations on dense Fe-doped hexagonal BaTiO3
DOI:10.1063/1.3658813  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Wei, X. K.;Su, Y. T.;Sui, Y.;Zhang, Q. H.;Yao, Y.;Jin, C. Q.;Yu, R. C.;
7:4:13:17     Magnetic properties of Co-implanted BaTiO3 perovskite crystal
DOI:10.1103/PhysRevB.82.054402  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Kazan, S.;Mikailzade, F. A.;Sale, A. G.;Maksutoglu, M.;Acikgoz, M.;Khaibullin, R. I.;Khalitov, N. I.;Gatiiatova, Ju. I.;Valeev, V. F.;
7:4:13:18     Effects of niobium donor doping on the phase structures and magnetic properties of Fe-doped BaTiO3 ceramics
DOI:10.1016/j.jallcom.2009.12.031  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:16  AU: Du, Guo-Ping;Hu, Zhi-Juan;Han, Qi-Feng;Qin, Xiao-Mei;Shi, Wang-Zhou;
7:4:13:19     Structural incommensurate modulation rule in hexagonal Ba(Ti1-xMx)O3-delta (M = Mn, Fe) multiferroics
DOI:10.1063/1.4766181  JN:AIP ADVANCES  PY:2012
  TC:2  AU: Wei, X. K.;Zhang, Q. H.;Jin, C. Q.;Yu, R. C.;
7:4:13:20     Hexagonal BaTi1-xCoxO3 phase stabilized by Co dopants
DOI:10.1063/1.3337110  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Li, Yuanyuan;Liu, Qinghua;Yao, Tao;Pan, Zhiyun;Sun, Zhihu;Jiang, Yong;Zhang, Hong;Pan, Zijia;Yan, Wensheng;Wei, Shiqiang;
7:4:13:21     Influences of annealing temperature on structural characterization and magnetic properties of Mn-doped BaTiO3 ceramics
DOI:10.1063/1.4733691  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Phan, The-Long;Zhang, P.;Grinting, D.;Yu, S. C.;Nghia, N. X.;Dang, N. V.;Lam, V. D.;
7:4:13:22     Room temperature magnetism and ferroelectricity in BaTi(0.95-x)Ef(0.05)Co(x)O(3) ceramics
DOI:10.1016/j.jmmm.2014.03.046  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Das, S. K.;Roul, B. K.;
7:4:13:23     Synthesis of Co-doped barium strontium titanate nanofibers by sol-gel/electrospinning process
DOI:10.1016/j.matlet.2012.02.035  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Li, Bin;Wang, Chunqing;Liu, Wei;Zhong, Ying;An, Rong;
7:4:13:24     Polymorphs and dielectric properties of BaTi1-xNixO3
DOI:10.1016/j.jallcom.2013.08.190  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Phong, P. T.;Huy, B. T.;Lee, Y. -I.;Lee, I. -J.;
7:4:13:25     Structure and magnetism of BaTi1-xFexO3-delta multiferroics
DOI:10.1063/1.3677778  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Dang, N. V.;Nguyen, Ha M.;Chuang, Pei-Yu;Zhang, Jie-Hao;Thanh, T. D.;Hu, Chih-Wei;Chen, Tsan-Yao;Yang, Hung-Duen;Lam, V. D.;Lee, Chih-Hao;Hong, L. V.;
7:4:13:26     Investigation of A-site La substituted BaTi0.96Mn0.04O3 ceramics: Searching for ferromagnetic origin
DOI:10.1063/1.4884221  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Gong, Gaoshang;Fang, Yujiao;Zerihun, Gebru;Yin, Chongyang;Huang, Shuai;Yuan, Songliu;
7:4:13:27     Defect controlled room temperature ferromagnetism in Co-doped barium titanate nanocrystals
DOI:10.1088/0957-4484/23/2/025702  JN:NANOTECHNOLOGY  PY:2012
  TC:12  AU: Ray, Sugata;Kolen'ko, Yury V.;Kovnir, Kirill A.;Lebedev, Oleg I.;Turner, Stuart;Chakraborty, Tanushree;Erni, Rolf;Watanabe, Tomoaki;Van Tendeloo, Gustaaf;Yoshimura, Masahiro;Itoh, Mitsuru;
7:4:13:28     Fe concentration dependences of microstructure and magnetic properties for Cu(Cr1-xFex)O-2 ceramics
DOI:10.1016/j.jallcom.2013.02.161  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Gao, Cai;Lin, Fangting;Zhou, Xiaoshan;Shi, Wangzhou;Liu, Aiyun;
7:4:13:29     Ferroelectric and magnetic properties of Fe-doped BaTiO3 thin films grown by the pulsed laser deposition
DOI:10.1063/1.4801965  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Ramana, E. Venkata;Yang, S. M.;Jung, Ranju;Jung, M. H.;Lee, B. W.;Jung, C. U.;
7:4:13:30     Origin of ferromagnetism in BaTiO3 nanoparticles prepared by mechanical milling
DOI:10.1063/1.4799473  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: The-Long Phan;Zhang, P.;Yang, D. S.;Thanh, T. D.;Tuan, D. A.;Yu, S. C.;
7:4:13:31     Nanosized hexagonal Mn- and Ga-doped BaTiO3 with reduced structural phase transition temperature
DOI:10.1063/1.3573810  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Natsui, Hidesada;Moriyoshi, Chikako;Yoshida, Fumiko;Kuroiwa, Yoshihiro;Ishii, Tatsuya;Odawara, Osamu;Yu, Jianding;Yoda, Shinichi;
7:4:13:32     Influence of non-isovalent ion substitution at A site on microstructure and magnetic properties of Ba(Ti0.3Fe0.7)O-3 ceramic
DOI:10.1016/j.jallcom.2010.01.113  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:4  AU: Lin, Fangting;Shi, Wangzhou;
7:4:13:33     Evolution of diffuse microscopic phases and magnetism in Ca, Fe co-doped BaTiO3
DOI:10.1016/j.jallcom.2014.04.155  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Chakraborty, Tanushree;Ray, Sugata;
7:4:13:34     Multiferroic properties in Ba(0.93)Bi(0.07)Ti(1-x)MnxO(3) ceramics
DOI:10.1063/1.3402285  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Wang, C. H.;Yuan, S. L.;Yin, S. Y.;Tian, Z. M.;Li, P.;
7:4:13:35     Structural, electrical, and magnetic properties of Ba0.9Ca0.1Ti0.97Fe0.03O3 and the effect of oxygen vacancies
DOI:10.1063/1.4844455  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Chakraborty, Tanushree;Meneghini, Carlo;Aquilanti, Giuliana;Ray, Sugata;
7:4:13:36     Search for long-range ferromagnetism: Charge-spin co-doped Ba1-x-yLax+yTi1-xMxO3 (M = Cr, Fe, and Co)
DOI:10.1063/1.4790869  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Shao, D. F.;Yang, J.;Jian, H. B.;Zhu, X. B.;Sun, Y. P.;
7:4:13:37     Effect ofSrconcentrationonmicrostructureandmagneticpropertiesof (Ba1-xSrx)(Ti0.3Fe0.7)O-3 ceramics
DOI:10.1016/j.jmmm.2010.03.004  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:5  AU: Lin, Fangting;Shi, Wangzhou;
7:4:13:38     Structural and magnetic properties of single-crystalline Co-doped barium titanate nanoparticles
DOI:10.1016/j.jmmm.2009.11.004  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Liu, Hongxue;Cao, Baobao;O'Connor, Charles J.;
7:4:13:39     Magnetic properties of BaTiO3 and BaTi1-xMxO3 (M=Co, Fe) nanocrystals by hydrothermal method
DOI:10.1016/j.jmmm.2013.09.036  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:6  AU: Yang, Lihong;Qiu, Hongmei;Pan, Liqing;Guo, Zhengang;Xu, Mei;Yin, Jinhua;Zhao, Xuedan;
7:4:13:40     Synthesis and Characterization the Dielectric Properties of Cobalt Doping Hexagonal BaTiO3
DOI:10.1080/00150193.2013.846190  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Yu, Shau-Wei;Yeh, Wang-Chi Vincent;Jou, Jya-Ler;Lei, Chien-Ming;
7:4:13:41     Densification, microstructural evolution and microwave dielectric properties of fluxed sintered 12R-Ba(Ti0.5Mn0.5)O-3 ceramics
DOI:10.1016/j.ceramint.2010.12.014  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:1  AU: Wang, Sea-Fue;Hsu, Yung-Fu;Huang, Hsin-Sian;Liu, Yu-Jung;
7:4:13:42     First principles investigations of structural, electronic, elastic, and dielectric properties of KMgF3
DOI:10.1007/s10853-013-7581-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:0  AU: Pilania, G.;Sharma, Vinit;
7:4:13:43     The dielectric and photochromic properties of defect-rich BaTiO3 microcrystallites synthesized from Ti2O3
DOI:10.1016/j.mseb.2012.03.018  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:2  AU: Yu, Qian;Liu, Duo;Wang, Ruijun;Feng, Zhaobin;Zuo, Zhiyuan;Qin, Shubin;Liu, Hong;Xu, Xiangang;
7:4:13:44     Green emission from barium-strontium titanate matrix introduced into nano-porous anodic alumina
DOI:10.1016/j.optmat.2012.03.025  JN:OPTICAL MATERIALS  PY:2012
  TC:3  AU: Podhorodecki, A.;Gaponenko, N. V.;Banski, M.;Rudenko, M. V.;Khoroshko, L. S.;Sieradzki, A.;Misiewicz, J.;
7:4:14:1     Polymer-Based Magnetoelectric Materials
DOI:10.1002/adfm.201202780  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:40  AU: Martins, Pedro;Lanceros-Mendez, Senentxu;
7:4:14:2     Nucleation of electroactive beta-phase poly(vinilidene fluoride) with CoFe2O4 and NiFe2O4 nanofillers: a new method for the preparation of multiferroic nanocomposites
DOI:10.1007/s00339-010-6003-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:48  AU: Martins, P.;Costa, C. M.;Lanceros-Mendez, S.;
7:4:14:3     Effect of filler size and concentration on the structure and properties of poly(vinylidene fluoride)/BaTiO3 nanocomposites
DOI:10.1007/s10853-011-5916-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:37  AU: Mendes, S. F.;Costa, C. M.;Caparros, C.;Sencadas, V.;Lanceros-Mendez, S.;
7:4:14:4     Influence of Ferrite Nanoparticle Type and Content on the Crystallization Kinetics and Electroactive Phase Nucleation of Poly(vinylidene fluoride)
DOI:10.1021/la2008864  JN:LANGMUIR  PY:2011
  TC:39  AU: Sencadas, Vitor;Martins, Pedro;Pitaes, Alexandre;Benelmekki, Maria;Gomez Ribelles, Jose Luis;Lanceros-Mendez, Senentxu;
7:4:14:5     Dielectric and magnetic properties of ferrite/poly(vinylidene fluoride) nanocomposites
DOI:10.1016/j.matchemphys.2011.10.037  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:28  AU: Martins, P.;Costa, C. M.;Botelho, G.;Lanceros-Mendez, S.;Barandiaran, J. M.;Gutierrez, J.;
7:4:14:6     Crystallization kinetics and phase transformation of poly(vinylidene fluoride) films incorporated with functionalized baTiO3 nanoparticles
DOI:10.1002/app.38949  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2013
  TC:9  AU: Ye, Hui-Jian;Shao, Wen-Zhu;Zhen, Liang;
7:4:14:7     Influence of the beta-phase content and degree of crystallinity on the piezo- and ferroelectric properties of poly(vinylidene fluoride)
DOI:10.1088/0964-1726/19/6/065010  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:53  AU: Gomes, J.;Nunes, J. Serrado;Sencadas, V.;Lanceros-Mendez, S.;
7:4:14:8     Evaluation of reduced graphene oxide/ZnO effect on properties of PVDF nanocomposite films
DOI:10.1016/j.apsusc.2014.09.030  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:5  AU: Jaleh, B.;Jabbari, A.;
7:4:14:9     alpha- and gamma-PVDF: Crystallization kinetics, microstructural variations and thermal behaviour
DOI:10.1016/j.matchemphys.2010.02.067  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:31  AU: Silva, M. P.;Sencadas, V.;Botelho, G.;Machado, A. V.;Rolo, A. G.;Rocha, J. G.;Lanceros-Mendez, S.;
7:4:14:10     Preparation and electroactive properties of a PVDF/nano-TiO2 composite film
DOI:10.1016/j.apsusc.2010.12.076  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:32  AU: An, Ningli;Liu, Hongzhong;Ding, Yucheng;Zhang, Min;Tang, Yiping;
7:4:14:11     Unzipped multiwalled carbon nanotubes-incorporated poly(vinylidene fluoride) nanocomposites with enhanced interface and piezoelectric beta phase
DOI:10.1016/j.jcis.2012.10.060  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2013
  TC:6  AU: He, Linghao;Xia, Guangmei;Sun, Jing;Zhao, Qiaoling;Song, Rui;Ma, Zhi;
7:4:14:12     Influence of zeolite structure and chemistry on the electrical response and crystallization phase of poly(vinylidene fluoride)
DOI:10.1007/s10853-012-6995-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:8  AU: Lopes, A. C.;Caparros, C.;Ferdov, S.;Lanceros-Mendez, S.;
7:4:14:13     Magnetic, dielectric and magnetodielectric properties of PVDF-La0.7Sr0.3MnO3 polymer nanocomposite film
DOI:10.1063/1.4830282  JN:AIP ADVANCES  PY:2013
  TC:4  AU: Thirmal, Ch.;Nayek, Chiranjib;Murugavel, P.;Subramanian, V.;
7:4:14:14     Optimization of the Magnetoelectric Response of Poly(vinylidene fluoride)/Epoxy/Vitrovac Laminates
DOI:10.1021/am4031054  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:9  AU: Silva, M.;Reis, S.;Lehmann, C. S.;Martins, P.;Lanceros-Mendez, S.;Lasheras, A.;Gutierrez, J.;Barandiaran, J. M.;
7:4:14:15     Ferroelectric and magnetic studies on unpoled Poly (vinylidine Fluoride)/Fe3O4 magnetoelectric nanocomposite structures
DOI:10.1016/j.matchemphys.2012.09.064  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:9  AU: Prabhakaran, T.;Hemalatha, J.;
7:4:14:16     Enhancement of beta-crystalline phase of poly(vinylidene fluoride) in the presence of hyperbranched copolymer wrapped multiwalled carbon nanotubes
DOI:10.1016/j.jcis.2011.07.042  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2011
  TC:15  AU: He, Linghao;Sun, Jing;Wang, Xiuxin;Yao, Lu;Li, Jialong;Song, Rui;Hao, Yongmei;He, Yujian;Huang, Wei;
7:4:14:17     BiFeO3/poly(methyl methacrylate) nanocomposite films: A study on magnetic and dielectric properties
DOI:10.1063/1.4863228  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Ahlawat, Anju;Satapathy, S.;Bhartiya, Shushmita;Singh, M. K.;Choudhary, R. J.;Gupta, P. K.;
7:4:14:18     Enhanced Piezoelectric Responses and Crystalline Arrangement of Electroactive Polyvinylidene Fluoride/Magnetite Nanocomposites
DOI:10.1002/app.40941  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2014
  TC:2  AU: Ouyang, Zen-Wei;Chen, Erh-Chiang;Wu, Tzong-Ming;
7:4:14:19     Evaluation of dielectric models for ceramic/polymer composites: Effect of filler size and concentration
DOI:10.1016/j.jnoncrysol.2013.12.005  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2014
  TC:7  AU: Carvalho Araujo, M.;Costa, C. M.;Lanceros-Mendez, S.;
7:4:14:20     Isothermal crystallization kinetics of poly(vinylidene fluoride) in the alpha-phase in the scope of the Avrami equation
DOI:10.1007/s10853-009-4086-3  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:12  AU: Sencadas, V.;Costa, C. M.;Gomez Ribelles, J. L.;Lanceros-Mendez, S.;
7:4:14:21     Interface characterization and thermal degradation of ferrite/poly(vinylidene fluoride) multiferroic nanocomposites
DOI:10.1007/s10853-012-7063-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:8  AU: Martins, P.;Costa, C. M.;Benelmekki, M.;Botelho, G.;Lanceros-Mendez, S.;
7:4:14:22     Micro and nanofilms of poly(vinylidene fluoride) with controlled thickness, morphology and electroactive crystalline phase for sensor and actuator applications
DOI:10.1088/0964-1726/20/8/087002  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:19  AU: Cardoso, V. F.;Minas, G.;Costa, C. M.;Tavares, C. J.;Lanceros-Mendez, S.;
7:4:14:23     Li-ion battery separator membranes based on poly(vinylidene fluoride-trifluoroethylene)/carbon nanotube composites
DOI:10.1016/j.ssi.2013.07.021  JN:SOLID STATE IONICS  PY:2013
  TC:3  AU: Nunes-Pereira, J.;Costa, C. M.;Leones, R.;Silva, M. M.;Lanceros-Mendez, S.;
7:4:14:24     Fabrication and dielectric properties of Na0.5Bi0.5Cu3Ti4O12/poly(vinylidene fluoride) composites
DOI:10.1007/s10853-013-7627-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:0  AU: Su, Yan-li;Sun, Cheng;Zhang, Wen-qin;Huang, He;
7:4:14:25     Influence of processing parameters on the polymer phase, microstructure and macroscopic properties of poly(vinilidene fluoride)/Pb(Zr0.53Ti0.47)O-3 composites
DOI:10.1016/j.jnoncrysol.2010.07.037  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2010
  TC:12  AU: Costa, C. M.;Firmino Mendes, S.;Sencadas, V.;Ferreira, A.;Gregorio, R., Jr.;Gomez Ribelles, J. L.;Lanceros-Mendez, S.;
7:4:14:26     Nucleation of the electroactive beta-phase, dielectric and magnetic response of poly(vinylidene fluoride) composites with Fe2O3 nanoparticles
DOI:10.1016/j.jnoncrysol.2012.11.003  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2013
  TC:11  AU: Goncalves, R.;Martins, P. M.;Caparros, C.;Martins, P.;Benelmekki, M.;Botelho, G.;Lanceros-Mendez, S.;Lasheras, A.;Gutierrez, J.;Barandiaran, J. M.;
7:4:14:27     Does dynamic vulcanization induce phase separation?
DOI:10.1039/c4sm00632a  JN:SOFT MATTER  PY:2014
  TC:3  AU: Abolhasani, Mohammad Mahdi;Zarejousheghani, Fatemeh;Naebe, Minoo;Guo, Qipeng;
7:4:14:28     Multi-energy conversion of Gd-5 (SiGe2)-poly (vinylidene fluoride), a hybrid material
DOI:10.1063/1.48932961  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ozaydin, M. F.;Liang, H.;
7:4:14:29     The effect of nanotube surface oxidation on the electrical properties of multiwall carbon nanotube/poly(vinylidene fluoride) composites
DOI:10.1007/s10853-012-6705-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:7  AU: Carabineiro, S. A. C.;Pereira, M. F. R.;Nunes-Pereira, J.;Silva, J.;Caparros, C.;Sencadas, V.;Lanceros-Mendez, S.;
7:4:14:30     Poly(vinylidene fluoride)-acrylic rubber partially miscible blends: Phase behavior and its effects on the mechanical properties
DOI:10.1002/app.39213  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2013
  TC:10  AU: Abolhasani, Mohammad Mahdi;Guo, Qipeng;Jalali-Arani, Azam;Nazockdast, Hossein;
7:4:14:31     Effect of filler content on morphology and physical-chemical characteristics of poly(vinylidene fluoride)/NaY zeolite-filled membranes
DOI:10.1007/s10853-014-8043-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:2  AU: Lopes, A. C.;Ribeiro, C.;Sencadas, V.;Botelho, G.;Lanceros-Mendez, S.;
7:4:14:32     Effect of POSS nanofiller on structure, thermal and mechanical properties of PVDF matrix
DOI:10.1007/s11051-013-2116-1  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:1  AU: Liu, Yizhi;Sun, Yi;Zeng, Fanlin;Liu, Jingcang;Ge, Jingran;
7:4:14:33     Multifunctional Silver Poly(vinylidene fluoride) Nanocomposites: Nanoparticle Synthesis, Film Processing, and Structural Characterization
DOI:10.1080/00150193.2010.482896  JN:FERROELECTRICS  PY:2010
  TC:6  AU: Greco, Tonino;Wang, Feipeng;Wegener, Michael;
7:4:14:34     Large linear anhysteretic magnetoelectric voltage coefficients in CoFe2O4/polyvinylidene fluoride 0-3 nanocomposites
DOI:10.1007/s11051-013-1825-9  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:1  AU: Martins, P.;Moya, X.;Caparros, C.;Fernandez, J.;Mathur, N. D.;Lanceros-Mendez, S.;
7:4:14:35     gamma-Phase nucleation and electrical response of poly(vinylidene fluoride)/microporous titanosilicates composites
DOI:10.1016/j.matchemphys.2012.12.018  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:4  AU: Caparros, Cristina;Lopes, Ana Catarina;Ferdov, Stanislav;Lanceros-Mendez, Senentxu;
7:4:14:36     Poly(vinylidene fluoride)-acrylic rubber partially miscible blends: Crystallization within conjugated phases induce dual lamellar crystalline structure
DOI:10.1016/j.polymer.2013.06.044  JN:POLYMER  PY:2013
  TC:10  AU: Abolhasani, M. M.;Jalali-Arani, A.;Nazockdast, H.;Guo, Qipeng;
7:4:14:37     In-situ preparation of high dielectric poly (metal phthalocyanine) imide/MWCNTs nanocomposites
DOI:10.1016/j.synthmet.2013.12.001  JN:SYNTHETIC METALS  PY:2014
  TC:2  AU: Zhang, Gang;Mu, Jianxin;Liu, Yu;Jiang, Zhenhua;Zhang, Yunhe;
7:4:14:38     Magnetoelectric effect in lead-free BNKLBT ceramic/terfenol-D continue fiber composite laminates
DOI:10.1063/1.3385413  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Lo, C. Y.;Choy, S. H.;Or, S. W.;Chan, H. L. W.;
7:4:14:39     Effect of interface bonding on the phase-transformation-aided magnetoelectric effect in ferromagnetic/ferroelectric composites
DOI:10.1007/s10853-010-5096-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:2  AU: Wang, Rui-Hong;Zhang, Guo-Jun;Zhao, Mai-Qun;
7:4:15:1     Prospects for nanostructured multiferroic composite materials
DOI:10.1016/j.scriptamat.2013.09.023  JN:SCRIPTA MATERIALIA  PY:2014
  TC:9  AU: Andrew, Jennifer S.;Starr, Justin D.;Budi, Maeve A. K.;
7:4:15:2     Synthesis and characterization of novel CoFe2O4-BaTiO3 multiferroic core-shell-type nanostructures
DOI:10.1016/j.actamat.2009.09.054  JN:ACTA MATERIALIA  PY:2010
  TC:48  AU: Corral-Flores, V.;Bueno-Baques, D.;Ziolo, R. F.;
7:4:15:3     Multiferroic and magnetoelectric properties of core-shell CoFe2O4@BaTiO3 nanocomposites
DOI:10.1063/1.3478231  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:34  AU: Raidongia, Kalyan;Nag, Angshuman;Sundaresan, A.;Rao, C. N. R.;
7:4:15:4     The enhanced magnetodielectric interaction of (1-x)BaTiO3-xCoFe2O4 multiferroic composites
DOI:10.1039/c4tc00008k  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:5  AU: Shen, Yajing;Sun, Junpeng;Li, Linglong;Yao, Yonggang;Zhou, Chao;Su, Ran;Yang, Yaodong;
7:4:15:5     Effects of the chemical composition of the magnetostrictive phase on the dielectric and magnetoelectric properties of cobalt ferrite-barium titanate composites
DOI:10.1016/j.jallcom.2011.03.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:11  AU: Hrib, L. M.;Caltun, O. F.;
7:4:15:6     Recent advances in multiferroic thin films and composites
DOI:10.1016/j.jallcom.2012.05.125  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:19  AU: Roy, Subhasis;Majumder, S. B.;
7:4:15:7     Multiferroic properties of multilayered BaTiO3-CoFe2O4 composites via tape casting method
DOI:10.1007/s10853-012-6726-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:8  AU: Hao, Liangbin;Zhou, Dongxiang;Fu, Qiuyun;Hu, Yunxiang;
7:4:15:8     Converse magnetoelectric effect in CoFe2O4-BaTiO3 composites with a core-shell structure
DOI:10.1088/0964-1726/20/7/075006  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:16  AU: Shvartsman, V. V.;Alawneh, F.;Borisov, P.;Kozodaev, D.;Lupascu, D. C.;
7:4:15:9     Cobalt Ferrite/Barium Titanate Core/Shell Nanoparticles
DOI:10.1080/00150193.2012.743773  JN:FERROELECTRICS  PY:2012
  TC:5  AU: Etier, M.;Gao, Y.;Shvartsman, V. V.;Elsukova, A.;Landers, J.;Wende, H.;Lupascu, D. C.;
7:4:15:10     Synthesis of BaTiO3-20wt%CoFe2O4 Nanocomposites via Spark Plasma Sintering
DOI:10.1111/j.1551-2916.2012.05221.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:10  AU: Ghosh, Dipankar;Han, Hyuksu;Nino, Juan C.;Subhash, Ghatu;Jones, Jacob L.;
7:4:15:11     Magnetocapacitance in BaTiO3-CoFe2O4 nanocomposites
DOI:10.1016/j.tsf.2009.12.048  JN:THIN SOLID FILMS  PY:2010
  TC:18  AU: Fina, I.;Dix, N.;Fabrega, L.;Sanchez, F.;Fontcuberta, J.;
7:4:15:12     CoFe2O4/BaTiO3 Composites via Spark Plasma Sintering with Enhanced Magnetoelectric Coupling and Excellent Anisotropy
DOI:10.1111/j.1551-2916.2011.04582.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Liu, Yang;Ruan, Xuefeng;Zhu, Benpeng;Chen, Shi;Lu, Zhihong;Shi, Jing;Xiong, Rui;
7:4:15:13     Exchange bias effect in nickel zinc ferrite-mesoporous silica nanocomposites
DOI:10.1016/j.jmmm.2012.12.023  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:3  AU: Banerjee, Shilpi;Hajra, Partha;Mada, Mykanth Reddy;Bhaumik, Asim;Bandyopadhyay;Chakravorty, Dipankar;
7:4:15:14     Multiferroic behaviour of nanoporous BaTiO3
DOI:10.1063/1.3641639  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:14  AU: Banerjee, Shilpi;Datta, Anindya;Bhaumik, Asim;Chakravorty, Dipankar;
7:4:15:15     Multifunctional behaviour of mesoporous LiNbO3
DOI:10.1063/1.3693041  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Banerjee, Shilpi;Bhunia, Manas Kumar;Bhaumik, Asim;Chakravorty, Dipankar;
7:4:15:16     Giant magnetocapacitance effect in nickel zinc ferrite impregnated mesoporous silica
DOI:10.1016/j.matlet.2012.03.076  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Banerjee, Shilpi;Hajra, Partha;Bhaumik, Asim;Chakravorty, Dipankar;
7:4:15:17     Dependence of magnetoelectric properties on the magnetostrictive content in 0-3 composites
DOI:10.1016/j.ceramint.2012.10.064  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Rafique, Mohsin;ul Hassan, Syed Qamar;Awan, M. S.;Manzoor, Sadia;
7:4:15:18     Magnetodielectric properties of CoFe2O4-BaTiO3 core-shell nanocomposite
DOI:10.1016/j.jmmm.2014.06.039  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Selvi, M. Malar;Manimuthu, P.;Kumar, K. Saravana;Venkateswaran, C.;
7:4:15:19     Dielectric and magnetic properties of BaTiO3/Ni0.5Zn0.5Fe2O4 composite ceramics synthesized by a co-precipitation process
DOI:10.1016/j.jallcom.2014.06.065  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Zhu, Pengli;Zheng, Qi;Sun, Rong;Zhang, Wenjie;Gao, Jihua;Wong, Chingping;
7:4:15:20     Size effect on magnetoelectric coupling in multiferroic heterostructures
DOI:10.1063/1.3569748  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Lu, XiaoYan;Li, Hui;
7:4:15:21     Study of dielectric and magnetic properties of PbZr0.52Ti0.48O3-Mn0.3Co0.6Zn0.4Fe1.7O4 composite
DOI:10.1016/j.jmmm.2009.12.007  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:9  AU: Gupta, Arti;Chatterjee, Ratnamala;
7:4:15:22     Magnetoelectric Effect in (0-3) CoFe2O4-BaTiO3(20/80) Composite Ceramics Prepared by the Organosol Route
DOI:10.1080/00150193.2013.822292  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Etier, Morad;Shvartsman, Vladimir V.;Gao, Yanling;Landers, Joachim;Wende, Heiko;Lupascu, Doru C.;
7:4:15:23     Magnetoresistivity in CoFe2O4-BaTiO3 composites produced by spark plasma sintering
DOI:10.1063/1.3622584  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Stingaciu, Marian;Kremer, Reinhard K.;Lemmens, Peter;Johnsson, Mats;
7:4:15:24     A route to synthesize multifunctional tri-phasic nanofibers
DOI:10.1039/c3tc00949a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:5  AU: Starr, Justin D.;Andrew, Jennifer S.;
7:4:15:25     Studies on dielectric and magnetoelectric behavior of 25% CMFO ferrite and 75% BZT ferroelectric multiferroic magnetoelectric composites
DOI:10.1016/j.matlet.2009.11.064  JN:MATERIALS LETTERS  PY:2010
  TC:10  AU: Kambale, R. C.;Shaikh, P. A.;Kolekar, Y. D.;Bhosale, C. H.;Rajpure, K. Y.;
7:4:15:26     Fabrication and Properties of BaTiO3-CoFe2O4 Nanocomposites
DOI:10.1080/10584587.2013.852454  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:1  AU: Vittayakorn, Wanwilai C.;Pulphol, Nattakarn;Muanghlua, Rangson;Vittayakorn, Naratip;
7:4:15:27     Dielectrical and Magnetic Properties of CoFe2O4-BaTiO(3)Composite Films Prepared by a Combined Method of Sol-Gel and Electrophoretic Deposition
DOI:10.1111/j.1551-2916.2010.03823.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Zhang, Ling;Zhai, Jiwei;Mo, Weifeng;Yao, Xi;
7:4:15:28     Modified Composition of Cobalt Ferrite as Microwave Absorber in X-Band Frequencies
DOI:10.1080/10584587.2010.503797  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Gairola, S. P.;Verma, Vivek;Pandey, Vibhav;Ravi;Purohit, L. P.;Kotnala, R. K.;
7:4:15:29     Magnetoelectric properties of CoFe2O4-BaTiO3 core-shell structure composite studied by a magnetic pulse method
DOI:10.1016/j.jmmm.2009.09.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:7  AU: Duong, Giap V.;Turtelli, R. Sato;Groessinger, R.;
7:4:15:30     Electron Backscattered Diffraction of MonoCrystalline Bismuth Titanate
DOI:10.1111/j.1551-2916.2010.04132.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Palizdar, Meghdad;Palizdar, Yahya;Comyn, Tim P.;Bell, Andrew J.;
7:4:16:1     Controlling the electronic structure of Co1-xFe2+xO4 thin films through iron doping
DOI:10.1103/PhysRevB.83.035121  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Moyer, J. A.;Vaz, C. A. F.;Negusse, E.;Arena, D. A.;Henrich, V. E.;
7:4:16:2     Perpendicular magnetic anisotropy in 70 nm CoFe2O4 thin films fabricated on SiO2/Si(100) by the sol-gel method
DOI:10.1016/j.jallcom.2011.05.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Wang, X. W.;Zhang, Y. Q.;Meng, H.;Wang, Z. J.;Zhang, Z. D.;
7:4:16:3     Magnetic anisotropy and field switching in cobalt ferrite thin films deposited by pulsed laser ablation
DOI:10.1063/1.3327424  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:27  AU: Dhakal, T.;Mukherjee, D.;Hyde, R.;Mukherjee, P.;Phan, M. H.;Srikanth, H.;Witanachchi, S.;
7:4:16:4     Effect of non-magnetic ion substitution on the magnetoelastic properties of CoFe2O4 films
DOI:10.1063/1.4886581  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Rus, S. F.;Vlazan, P.;Herklotz, A.;
7:4:16:5     Magnetic structure of Fe-doped CoFe2O4 probed by x-ray magnetic spectroscopies
DOI:10.1103/PhysRevB.84.054447  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Moyer, J. A.;Vaz, C. A. F.;Arena, D. A.;Kumah, D.;Negusse, E.;Henrich, V. E.;
7:4:16:6     (111)-Oriented Co0.8Fe2.2O4+delta thin film grown by pulsed laser deposition: structural and magnetic properties
DOI:10.1007/s10853-013-7504-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:6  AU: Khodaei, M.;Ebrahimi, S. A. Seyyed;Park, Yong Jun;Choi, Sun Hee;Kim, CheolGi;Son, Junwoo;Baik, Sunggi;
7:4:16:7     Crossover of uniaxial magnetic anisotropy direction mediated by interfacial strain of CoFe2O4 films
DOI:10.1016/j.jmmm.2014.05.038  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Cho, C. -W.;Lee, D. Y.;Bae, J. S.;Park, S.;
7:4:16:8     Thickness dependent magnetic properties of (111)-oriented Co0.8Fe2.2O4 thin film grown by pulsed laser deposition
DOI:10.1016/j.tsf.2014.09.062  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Khodaei, M.;Ebrahimi, S. A. Seyyed;Park, Yong Jun;Choi, Sun Hee;Kim, CheolGi;Son, Junwoo;Baik, Sunggi;
7:4:16:9     Enhancement of in-plane magnetic anisotropy in (111)-oriented Co0.8Fe2.2O4 thin film by deposition of PZT top layer
DOI:10.1007/s00339-014-8486-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Khodaei, M.;Ebrahimi, S. A. Seyyed;Park, Yong Jun;Ok, Jong Mok;Kim, Jun Sung;Son, Junwoo;Baik, Sunggi;
7:4:16:10     Enhanced magnetic moment in ultrathin Fe-doped CoFe2O4 films
DOI:10.1103/PhysRevB.86.174404  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Moyer, J. A.;Vaz, C. A. F.;Kumah, D. P.;Arena, D. A.;Henrich, V. E.;
7:4:16:11     In-plane strain control of the magnetic remanence and cation-charge redistribution in CoFe2O4 thin film grown on a piezoelectric substrate
DOI:10.1103/PhysRevB.81.134401  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Park, Jung H.;Lee, Jung-Hoon;Kim, Min G.;Jeong, Young Kyu;Oak, Min-Ae;Jang, Hyun Myung;Choi, Hyoung Joon;Scott, James F.;
7:4:16:12     Extraordinarily large perpendicular magnetic anisotropy in epitaxially strained cobalt-ferrite CoxFe3-xO4(001) (x=0.75, 1.0) thin films
DOI:10.1063/1.4824761  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:12  AU: Niizeki, Tomohiko;Utsumi, Yuji;Aoyama, Ryohei;Yanagihara, Hideto;Inoue, Jun-ichiro;Yamasaki, Yuichi;Nakao, Hironori;Koike, Kazuyuki;Kita, Eiji;
7:4:16:13     Strong in-plane magnetic anisotropy in (111)-oriented CoFe2O4 thin film
DOI:10.1016/j.jmmm.2013.03.019  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:14  AU: Khodaei, M.;Ebrahimi, S. A. Seyyed;Park, Yong Jun;Ok, Jong Mok;Kim, Jun Sung;Son, Junwoo;Baik, Sunggi;
7:4:16:14     Epitaxial strain-induced changes in the cation distribution and resistivity of Fe-doped CoFe2O4
DOI:10.1063/1.4735233  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Moyer, J. A.;Kumah, D. P.;Vaz, C. A. F.;Arena, D. A.;Henrich, V. E.;
7:4:16:15     Perpendicular magnetic anisotropy in CoFe2O4(001) films epitaxially grown on MgO(001)
DOI:10.1063/1.3566079  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Yanagihara, H.;Uwabo, K.;Minagawa, M.;Kita, Eiji;Hirota, Noriyuki;
7:4:16:16     Role of epitaxial strain on the magnetic structure of Fe-doped CoFe2O4
DOI:10.1016/j.jmmm.2013.06.031  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:4  AU: Moyer, J. A.;Kumah, D. P.;Vaz, C. A. F.;Arena, D. A.;Henrich, V. E.;
7:4:16:17     Microstructural and domain effects in epitaxial CoFe2O4 films on MgO with perpendicular magnetic anisotropy
DOI:10.1016/j.jmmm.2011.08.033  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:7  AU: Comes, Ryan;Gu, Man;Khokhlov, Mikhail;Lu, Jiwei;Wolf, Stuart A.;
7:4:16:18     Growth of crystalline cobalt ferrite thin films at lower temperatures using pulsed-laser deposition technique
DOI:10.1063/1.3357315  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Raghunathan, A.;Nlebedim, I. C.;Jiles, D. C.;Snyder, J. E.;
7:4:16:19     Perpendicular magnetic anisotropy in epitaxially strained cobalt-ferrite (001) thin films
DOI:10.1063/1.4864048  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Yanagihara, H.;Utsumi, Y.;Niizeki, T.;Inoue, J.;Kita, Eiji;
7:4:16:20     Morphology and magnetic properties of Co0.8Fe2.2O4 films prepared by the chemical solution deposition
DOI:10.1016/j.jmmm.2009.09.008  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:7  AU: Zi, Z. F.;Zhang, S. B.;Wang, B.;Zhu, X. B.;Yang, Z. R.;Dai, J. M.;Song, W. H.;Sun, Y. P.;
7:4:16:21     Electron theory of perpendicular magnetic anisotropy of Co-ferrite thin films
DOI:10.1063/1.4866279  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Inoue, Jun-ichiro;Niizeki, Tomohiko;Yanagihara, Hideto;Itoh, Hiroyoshi;Kita, Eiji;
7:4:16:22     Thickness dependent anomalous magnetic behavior in pulsed-laser deposited cobalt ferrite thin film
DOI:10.1007/s00339-011-6709-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:4  AU: Sahoo, Subasa C.;Venkataramani, N.;Prasad, Shiva;Bohra, Murtaza;Krishnan, R.;
7:4:16:23     Influence of reactive atmosphere on properties of cobalt ferrite thin films prepared using pulsed-laser deposition
DOI:10.1063/1.3574918  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Raghunathan, A.;Jiles, D. C.;Snyder, J. E.;
7:4:16:24     Nonlinear strain dependence of magnetic anisotropy in CoFe2O4 films on MgO(001) substrates
DOI:10.1063/1.4853235  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Tanaka, M. A.;Harada, K.;Takemura, M.;Mibu, K.;Inoue, J.;
7:4:16:25     Stability of nonthermodynamic equilibrium cation distribution frozen during pulsed laser deposition of Co-ferrite thin films
DOI:10.1007/s00339-009-5471-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:4  AU: Sahoo, S. C.;Venkataramani, N.;Prasad, Shiva;Bohra, Murtaza;Krishnan, R.;
7:4:16:26     In-situ synthesis, local structure, photoelectrochemical property of Fe-intercalated titanate nanotube
DOI:10.1016/j.ijhydene.2012.04.158  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2012
  TC:6  AU: Jang, Jum Suk;Kim, Dong Hyun;Choi, Sun Hee;Jang, Ji Wook;Kim, Hyun Gyu;Lee, Jae Sung;
7:4:16:27     Structure and static magnetic properties of Zr-substituted NiZn ferrite thin films synthesized by sol-gel process
DOI:10.1016/j.jallcom.2012.08.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Li, Lezhong;Tu, Xiaoqiang;Peng, Long;Zhu, Xinghua;
7:4:16:28     Investigation of cation distribution in single crystalline Fe3-xMnxO4 microspheres based on Mossbauer spectroscopy
DOI:10.1063/1.3687007  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Li, Yong Hui;Kouh, Taejoon;Shim, In-Bo;Kim, Chul Sung;
7:4:17:1     High frequency magneto-dielectric effects in self-assembled ferrite-ferroelectric core-shell nanoparticles
DOI:10.1063/1.4895591  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Popov, M.;Sreenivasulu, G.;Petrov, V. M.;Chavez, F. A.;Srinivasan, G.;
7:4:17:2     Superstructures of self-assembled multiferroic core-shell nanoparticles and studies on magneto-electric interactions
DOI:10.1063/1.4893699  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Sreenivasulu, G.;Petrov, V. M.;Chavez, F. A.;Srinivasan, G.;
7:4:17:3     Controlled self-assembly of multiferroic core-shell nanoparticles exhibiting strong magneto-electric effects
DOI:10.1063/1.4863690  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Sreenivasulu, Gollapudi;Popov, Maksym;Chavez, Ferman A.;Hamilton, Sean L.;Lehto, Piper R.;Srinivasan, Gopalan;
7:4:17:4     Modular "Click" Chemistry for Electrochemically and Photoelectrochemically Active Molecular Interfaces to Tin Oxide Surfaces
DOI:10.1021/am200615r  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2011
  TC:22  AU: Benson, Michelle C.;Ruther, Rose E.;Gerken, James B.;Rigsby, Matthew L.;Bishop, Lee M.;Tan, Yizheng;Stahl, Shannon S.;Hamers, Robert J.;
7:4:17:5     Chemically Directed Assembly of Photoactive Metal Oxide Nanoparticle Heterojunctions via the Copper-Catalyzed Azide-Alkyne Cycloaddition "Click" Reaction
DOI:10.1021/nn203585r  JN:ACS NANO  PY:2012
  TC:19  AU: Cardiel, Allison C.;Benson, Michelle C.;Bishop, Lee M.;Louis, Kacie M.;Yeager, Joseph C.;Tan, Yizheng;Hamers, Robert J.;
7:4:17:6     A Citric Acid-Derived Ligand for Modular Functionalization of Metal Oxide Surfaces via "Click" Chemistry
DOI:10.1021/la204145t  JN:LANGMUIR  PY:2012
  TC:18  AU: Bishop, Lee M.;Yeager, Joseph C.;Chen, Xin;Wheeler, Jamie N.;Torelli, Marco D.;Benson, Michelle C.;Burke, Steven D.;Pedersen, Joel A.;Hamers, Robert J.;
7:4:17:7     Magnetic field-directed self-assembly of magnetic nanoparticles
DOI:10.1557/mrs.2013.233  JN:MRS BULLETIN  PY:2013
  TC:8  AU: Tracy, Joseph B.;Crawford, Thomas M.;
7:4:17:8     A "Clickable" Titanium Surface Platform
DOI:10.1021/la102688m  JN:LANGMUIR  PY:2010
  TC:30  AU: Watson, Matthew A.;Lyskawa, Joel;Zobrist, Cedric;Fournier, David;Jimenez, Maude;Traisnel, Michel;Gengembre, Leon;Woisel, Patrice;
7:4:17:9     Magnetic field assisted self-assembly of ferrite-ferroelectric core-shell nanofibers and studies on magneto-electric interactions
DOI:10.1063/1.4864113  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Sreenivasulu, G.;Popov, Maksym;Zhang, Ru;Sharma, K.;Janes, C.;Mukundan, A.;Srinivasan, G.;
7:4:17:10     Electric-field control of ferromagnetic resonance in monolithic BaFe(12)O(19)-Ba(0.5)Sr(0.5)TiO(3) heterostructures
DOI:10.1063/1.3467777  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Das, Jaydip;Song, Young-Yeal;Wu, Mingzhong;
7:4:17:11     Chemically assembled heterojunctions of SnO2 nanorods with TiO2 nanoparticles via "click" chemistry
DOI:10.1039/c2jm31227a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:6  AU: Shah, Sohil;Benson, Michelle C.;Bishop, Lee M.;Huhn, Alex M.;Ruther, Rose E.;Yeager, Joseph C.;Tan, Yizheng;Louis, Kacie M.;Hamers, Robert J.;
7:4:17:12     Generic Process for Highly Stable Metallic Nanoparticle-Semiconductor Heterostructures via Click Chemistry for Electro/Photocatalytic Applications
DOI:10.1021/am402398h  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:6  AU: Upadhyay, Arun Prakash;Behara, Dilip Kumar;Sharma, Gyan Prakash;Bajpai, Anshumaan;Sharac, Nicholas;Ragan, Regina;Pala, Raj Ganesh S.;Sivakumar, Sri;
7:4:17:13     Functionalization of Nanostructured ZnO Films by Copper-Free Click Reaction
DOI:10.1021/la4006949  JN:LANGMUIR  PY:2013
  TC:2  AU: Cao, Yan;Galoppini, Elena;Reyes, Pavel Ivanoff;Lu, Yicheng;
7:4:17:14     Chemical Bonding Assembly of Multifunctional Oxide Nanocomposites
DOI:10.1002/adfm.200901632  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:15  AU: Evans, Gary;Duong, Giap V.;Ingleson, Michael J.;Xu, Zhongling;Jones, James T. A.;Khimyak, Yaroslav Z.;Claridge, John B.;Rosseinsky, Matthew J.;
7:4:17:15     Effect of strain and deadlayer on the polarization switching of ferroelectric thin film
DOI:10.1063/1.3664913  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Wang, Jie;Xia, Yifan;Chen, Long-Qing;Shi, San-Qiang;
7:4:17:16     Arsonic Acid As a Robust Anchor Group for the Surface Modification of Fe3O4
DOI:10.1021/la402939r  JN:LANGMUIR  PY:2013
  TC:1  AU: Ahn, Jihoon;Moon, Doo-Sik;Lee, Jin-Kyu;
7:4:17:17     Magnetic Nanoparticle Assembly on Surfaces Using Click Chemistry
DOI:10.1021/la103715y  JN:LANGMUIR  PY:2011
  TC:12  AU: Kinge, Sachin;Gang, Tian;Naber, Wouter J. M.;van der Wiel, Wilfred G.;Reinhoudt, David N.;
7:4:17:18     Account for Mutual Influence of Electrical, Elastic, and Thermal Phenomena for Ferroelectric Domain Wall Modeling
DOI:10.1080/00150193.2013.773854  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Starkov, A. S.;Pakhomov, O. V.;Starkov, I. A.;
7:4:17:19     Phase field modeling of domain structures and P-E hysteresis in thin ferroelectric layers with deadlayers
DOI:10.1080/14786430903019065  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:3  AU: Artemev, A.;
7:4:18:1     Coexistence of Antiferromagnetic and Spin Cluster Glass Order in the Magnetoelectric Relaxor Multiferroic PbFe0.5Nb0.5O3
DOI:10.1103/PhysRevLett.105.257202  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:39  AU: Kleemann, W.;Shvartsman, V. V.;Borisov, P.;Kania, A.;
7:4:18:2     Magnetic properties of PbFe1/2Nb1/2O3: Mossbauer spectroscopy and first-principles calculations
DOI:10.1103/PhysRevB.85.224412  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Raevski, I. P.;Kubrin, S. P.;Raevskaya, S. I.;Sarychev, D. A.;Prosandeev, S. A.;Malitskaya, M. A.;
7:4:18:3     Nb-93 NMR and Fe3+ EPR study of local magnetic properties of magnetoelectric Pb(Fe1/2Nb1/2)O-3
DOI:10.1016/j.materresbull.2010.06.060  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:24  AU: Laguta, V. V.;Rosa, J.;Jastrabik, L.;Blinc, R.;Cevc, P.;Zalar, B.;Remskar, M.;Raevskaya, S. I.;Raevski, I. P.;
7:4:18:4     Spin correlated dielectric memory and rejuvenation in multiferroic CuCrS2
DOI:10.1063/1.4863937  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Karmakar, A.;Dey, K.;Chatterjee, S.;Majumdar, S.;Giri, S.;
7:4:18:5     Effect of Ba and Ti doping on magnetic properties of multiferroic Pb(Fe1/2Nb1/2)O-3
DOI:10.1103/PhysRevB.87.064403  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Laguta, V. V.;Glinchuk, M. D.;Marysko, M.;Kuzian, R. O.;Prosandeev, S. A.;Raevskaya, S. I.;Smotrakov, V. G.;Eremkin, V. V.;Raevski, I. P.;
7:4:18:6     Magnetic interactions in disordered perovskite PbFe1/2Nb1/2O3 and related compounds: Dominance of nearest-neighbor interaction
DOI:10.1103/PhysRevB.89.024402  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kuzian, R. O.;Kondakova, I. V.;Dare, A. M.;Laguta, V. V.;
7:4:18:7     Ferroic transitions in the multiferroic (1-x)Pb(Fe1/2Nb1/2)O-3-xPbTiO(3) system and its phase diagram
DOI:10.1016/j.actamat.2010.06.014  JN:ACTA MATERIALIA  PY:2010
  TC:21  AU: Singh, Satendra Pal;Yusuf, S. M.;Yoon, Songhak;Baik, Sunggi;Shin, Namsoo;Pandey, Dhananjai;
7:4:18:8     Raman Spectra of PbFe0.5Nb0.5O3 Multiferroic Single Crystals and Ceramics
DOI:10.1080/00150193.2012.747391  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Druzhinina, N. S.;Yuzyuk, Yu. I.;Raevski, I. P.;El Marssi, M.;Laguta, V. V.;Raevskaya, S. I.;
7:4:18:9     Crystal structure evolution and local symmetry of perovskite solid solution Ba[(Fe1/2Nb1/2)(1-x)Ti-x]O-3 investigated by Raman spectra
DOI:10.1063/1.3639283  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Zhang, Wei;Wang, Zhuo;Chen, Xiang Ming;
7:4:18:10     Studies of ferroelectric and magnetic phase transitions in multiferroic PbFe0.5Ta0.5O3-PbTiO3 solid solution ceramics
DOI:10.1007/s10853-014-8376-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:6  AU: Raevski, I. P.;Titov, V. V.;Malitskaya, M. A.;Eremin, E. V.;Kubrin, S. P.;Blazhevich, A. V.;Chen, H.;Chou, C. -C.;Raevskaya, S. I.;Zakharchenko, I. N.;Sarychev, D. A.;Shevtsova, S. I.;
7:4:18:11     Microscopic coexistence of antiferromagnetic and spin-glass states
DOI:10.1103/PhysRevB.87.220403  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Chillal, Sh.;Thede, M.;Litterst, F. J.;Gvasaliya, S. N.;Shaplygina, T. A.;Lushnikov, S. G.;Zheludev, A.;
7:4:18:12     Pressure-induced polar phases in relaxor multiferroic PbFe0.5Nb0.5O3
DOI:10.1103/PhysRevB.89.174107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kozlenko, D. P.;Kichanov, S. E.;Lukin, E. V.;Dang, N. T.;Dubrovinsky, L. S.;Liermann, H. -P.;Morgenroth, W.;Kamynin, A. A.;Gridnev, S. A.;Savenko, B. N.;
7:4:18:13     Field-Induced Enhancement of Pyroelectric Response of PbMg1/3Nb2/3O3-PbTiO3 and PbFe1/2Nb1/2O3-PbTiO3 Solid Solution Ceramics
DOI:10.1080/00150193.2010.489850  JN:FERROELECTRICS  PY:2010
  TC:10  AU: Zakharov, Yu. N.;Raevskaya, S. I.;Lutokhin, A. G.;Titov, V. V.;Raevski, I. P.;Smotrakov, V. G.;Eremkin, V. V.;Emelyanov, A. S.;Pavelko, A. A.;
7:4:18:14     Piezoelectric Properties of PbFe1/2Nb1/2O3-PbTiO3 Ceramics from the Morphotropic Phase Boundary Compositional Range
DOI:10.1080/00150193.2011.594741  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Sitalo, E. I.;Raevski, I. P.;Lutokhin, A. G.;Kubrin, S. P.;Raevskaya, S. I.;Zakharov, Yu. N.;Malitskaya, M. A.;Blazhevich, A. V.;Zakharchenko, I. N.;
7:4:18:15     Magnetic and polar phases and dynamical clustering in multiferroic layered solid solutions CuCr1-xInxP2S6
DOI:10.1103/PhysRevB.84.094411  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Kleemann, W.;Shvartsman, V. V.;Borisov, P.;Banys, J.;Vysochanskii, Yu. M.;
7:4:18:16     Magnetic short- and long-range order in PbFe0.5Ta0.5O3
DOI:10.1103/PhysRevB.89.174418  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Chillal, S.;Gvasaliya, S. N.;Zheludev, A.;Schroeter, D.;Kraken, M.;Litterst, F. J.;Shaplygina, T. A.;Lushnikov, S. G.;
7:4:18:17     Local Structure Evolution in Ba-Substituted Pb(Fe1/2Nb1/2)O-3 Ceramics
DOI:10.1111/jace.13046  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Lv, Xin;Liu, Guo;Liu, Xiao Qiang;Chen, Xiang Ming;
7:4:18:18     Variable-range-hopping conductivity in high-k Ba(Fe0.5Nb0.5)O-3 ceramics
DOI:10.1063/1.4821042  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Ke, Shanming;Lin, Peng;Fan, Huiqing;Huang, Haitao;Zeng, Xierong;
7:4:18:19     Phase diagram of mixed Cu(InxCr1-x)P2S6 crystals
DOI:10.1103/PhysRevB.85.134105  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Dziaugys, A.;Shvartsman, V. V.;Macutkevic, J.;Banys, J.;Vysochanskii, Yu;Kleemann, W.;
7:4:18:20     Magnetoelectric Coupling in Disordered Multiferroics
DOI:10.1080/00150193.2012.675272  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Kleemann, Wolfgang;
7:4:18:21     Mossbauer Studies of PbFe0.5Nb0.5O3 - PbFe0.5Sb0.5O3 Multiferroic Solid Solutions
DOI:10.1080/00150193.2013.785914  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Raevski, I. P.;Olekhnovich, N. M.;Pushkarev, A. V.;Radyush, Y. V.;Kubrin, S. P.;Raevskaya, S. I.;Malitskaya, M. A.;Titov, V. V.;Stashenko, V. V.;
7:4:18:22     Cooling field and temperature dependence on training effect in NiFe2O4-NiO nanogranular system
DOI:10.1063/1.3660277  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Tian, Z. M.;Chen, J. T.;Yuan, S. L.;Zhang, Y. S.;Ma, Z. Z.;Duan, H. N.;Lu, C. L.;
7:4:18:23     A study of phase coexistence and temperature dependent monoclinic to tetragonal phase transition in the multiferroic (1-x)Pb(Fe1/2Nb1/2)O-3-xPbTiO(3) (x=0.08)
DOI:10.1063/1.3486159  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Singh, Satendra Pal;Yoon, Songhak;Baik, Sunggi;Shin, Namsoo;Pandey, Dhananjai;
7:4:18:24     X-ray photoelectron study and first principle calculations of the electronic structure of PbFe1/2Nb1/2O3 single crystal in the ferroelectric and paraelectric phases
DOI:10.1016/j.jallcom.2013.05.229  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Kozakov, A. T.;Polozhentsev, O. E.;Soldatov, A. V.;Googlev, K. A.;Nikolsky, A. V.;Raevski, I. P.;
7:4:18:25     Studies of Ferroelectric and Magnetic Phase Transitions in Pb(1-x)A(x)Fe(1/2)Nb(1/2)O(3) (A-Ca, Ba) Solid Solutions
DOI:10.1080/00150193.2010.489807  JN:FERROELECTRICS  PY:2010
  TC:9  AU: Raevski, I. P.;Kubrin, S. P.;Raevskaya, S. I.;Titov, V. V.;Prosandeev, S. A.;Sarychev, D. A.;Malitskaya, M. A.;Stashenko, V. V.;Zakharchenko, I. N.;
7:4:18:26     The Effect of PbO-Nonstoichiometry on Dielectric and Semiconducting Properties of PbFe0.5Nb0.5O3-Based Ceramics
DOI:10.1080/00150193.2010.484738  JN:FERROELECTRICS  PY:2010
  TC:8  AU: Raevski, I. P.;Kubrin, S. P.;Kovrigina, S. A.;Raevskaya, S. I.;Titov, V. V.;Emelyanov, A. S.;Malitskaya, M. A.;Zakharchenko, I. N.;
7:4:18:27     Dielectric and Magnetic Properties of Sr(Fe1/2Ta1/2)O-3 Complex Perovskite Ceramics
DOI:10.1111/jace.12162  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:0  AU: Lv, Xin;Liu, Xiao Qiang;Zhao, Hong Jian;Yang, Wen Zhi;Chen, Xiang Ming;
7:4:18:28     Low frequency dielectric investigation of Rb-0.5(ND4)(0.5)D2PO4 dipolar glass: Comparison with nuclear magnetic resonance investigations
DOI:10.1063/1.3590147  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Banys, J.;Macutkevic, J.;Lapinskas, S.;Pirc, R.;Kutnjak, Z.;Blinc, R.;
7:4:18:29     Scandium induced structural transformation and B ':B '' cationic ordering in Pb(Fe0.5Nb0.5)O-3 multiferroic ceramics
DOI:10.1063/1.4890020  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Mallesham, B.;Ranjith, R.;Manivelraja, M.;
7:4:18:30     Microscopic coexistence of antiferromagnetic and spin-glass states (vol 87, 220403, 2013)
DOI:10.1103/PhysRevB.87.219905  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Chillal, S.;Thede, M.;Litterst, F. J.;Gvasaliya, S. N.;Shaplygina, T. A.;Lushnikov, S. G.;Zheludev, A.;
7:4:18:31     The Effect of Bias Field on Dielectric Response in Lead Ferrotantalate Ceramics
DOI:10.1080/10584587.2011.570673  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Bormanis, K.;Burkhanov, A. I.;Vaingolts, A. I.;Kalvane, A.;
7:4:18:32     Electronic, magnetic and multiferroic properties of magnetoelectric NiTiO3
DOI:10.1016/j.jallcom.2014.05.189  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Xin, Chao;Wang, Yi;Sui, Yu;Wang, Yang;Wang, Xianjie;Zhao, Kun;Liu, Zhiguo;Li, Bingsheng;Liu, Xiaoyang;
7:4:19:1     Room-temperature multiferroic magnetoelectrics
DOI:10.1038/am.2013.58  JN:NPG ASIA MATERIALS  PY:2013
  TC:33  AU: Scott, James F.;
7:4:19:2     Symmetries and multiferroic properties of novel room-temperature magnetoelectrics: Lead iron tantalate - lead zirconate titanate (PFT/PZT)
DOI:10.1063/1.3670361  JN:AIP ADVANCES  PY:2011
  TC:34  AU: Sanchez, Dilsom A.;Ortega, N.;Kumar, Ashok;Roque-Malherbe, R.;Polanco, R.;Scott, J. F.;Katiyar, Ram S.;
7:4:19:3     Phonon anomalies and phonon-spin coupling in oriented PbFe0.5Nb0.5O3 thin films
DOI:10.1103/PhysRevB.83.014302  JN:PHYSICAL REVIEW B  PY:2011
  TC:25  AU: Correa, Margarita;Kumar, Ashok;Priya, Shashank;Katiyar, R. S.;Scott, J. F.;
7:4:19:4     Novel room temperature multiferroics on the base of single-phase nanostructured perovskites
DOI:10.1063/1.4891459  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Glinchuk, Maya D.;Eliseev, Eugene A.;Morozovska, Anna N.;
7:4:19:5     Near-room temperature relaxor multiferroic
DOI:10.1063/1.3519979  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Sanchez, Dilsom A.;Kumar, A.;Ortega, N.;Katiyar, R. S.;Scott, J. F.;
7:4:19:6     Fabrication and characterization of the multiferroic birelaxor lead-iron-tungstate/lead-zirconate-titanate
DOI:10.1063/1.3481411  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:17  AU: Kumar, Ashok;Katiyar, R. S.;Scott, J. F.;
7:4:19:7     Room-temperature single phase multiferroic magnetoelectrics: Pb(Fe, M)(x)(Zr,Ti)((1-x))O-3 [M = Ta, Nb]
DOI:10.1063/1.4790317  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:11  AU: Sanchez, Dilsom A.;Ortega, Nora;Kumar, Ashok;Sreenivasulu, G.;Katiyar, Ram S.;Scott, J. F.;Evans, Donald M.;Arredondo-Arechavala, Miryam;Schilling, A.;Gregg, J. M.;
7:4:19:8     Multiferroic perovskite (Pb0.845Sm0.08Fe0.035)(Ti0.98Mn0.02)O-3 with ferroelectric and weak ferromagnetic properties
DOI:10.1063/1.4811258  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Craciun, F.;Dimitriu, E.;Grigoras, M.;Lupu, N.;
7:4:19:9     Biferroic relaxors
DOI:10.1063/1.3610556  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Kumar, Ashok;Scott, J. F.;Katiyar, R. S.;
7:4:19:10     Studies of the Room-Temperature Multiferroic Pb(Fe0.5Ta0.5)0.4(Zr0.53Ti0.47)0.6O3: Resonant Ultrasound Spectroscopy, Dielectric, and Magnetic Phenomena
DOI:10.1002/adfm.201303492  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:6  AU: Schiemer, J.;Carpenter, M. A.;Evans, D. M.;Gregg, J. M.;Schilling, A.;Arredondo, M.;Alexe, M.;Sanchez, D.;Ortega, N.;Katiyar, R. S.;Echizen, M.;Colliver, E.;Dutton, S.;Scott, J. F.;
7:4:19:11     Room temperature multiferroic properties of (Fe-x, Sr1-x)TiO3 thin films
DOI:10.1063/1.4894850  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kim, Kyoung-Tae;Kim, Cheolbok;Fang, Sheng-Po;Yoon, Yong-Kyu;
7:4:19:12     Size effects in the temperatures of phase transitions in KNbO3 nanopowder
DOI:10.1063/1.4801794  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Golovina, I. S.;Bryksa, V. P.;Strelchuk, V. V.;Geifman, I. N.;Andriiko, A. A.;
7:4:19:13     Electrical behavior of Pb(Zr0.52Ti0.48)(0.5)(Fe0.5Nb0.5)(0.5)O-3 ceramics
DOI:10.1016/j.matchemphys.2011.06.059  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:8  AU: Kumar, Nawnit;Ghosh, Avijit;Choudhary, R. N. P.;
7:4:19:14     Ferroelectric-carbon nanotube memory devices
DOI:10.1088/0957-4484/23/16/165702  JN:NANOTECHNOLOGY  PY:2012
  TC:7  AU: Kumar, Ashok;Shivareddy, Sai G.;Correa, Margarita;Resto, Oscar;Choi, Youngjin;Cole, Matthew T.;Katiyar, Ram S.;Scott, James F.;Amaratunga, Gehan A. J.;Lu, Haidong;Gruverman, Alexei;
7:4:19:15     The emergence of magnetic properties in (Pb0.845Sm0.08Fe0.035)(Ti0.98Mn0.02)O-3 and (Pb0.88Nd0.08)(Ti0.98Mn0.02)O-3 perovskite ceramics
DOI:10.1063/1.4893318  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Craciun, F.;Dimitriu, E.;Grigoras, M.;Lupu, N.;Vasile, B. S.;Cernea, M.;
7:4:19:16     Investigation of Multiferroic Properties of (PbZr0.53Ti0.47 O-3)((1-x))-(PbFe0.5Ta0.5O3)(x) Ceramics
DOI:10.1080/10584587.2011.573720  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Sanchez, Dilsom A.;Kumar, Ashok;Ortega, N.;Martinez, Ricardo;Katiyar, Ram S.;
7:4:19:17     Investigation on Room Temperature Multiferroic Bi-Relaxor
DOI:10.1080/10584587.2011.616422  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:3  AU: Kumar, Ashok;Scott, J. F.;Katiyar, R. S.;
7:4:19:18     Controlled Synthesis of BaTiO(3)-Coated Multiwall Carbon Nanotubes
DOI:10.1111/j.1551-2916.2010.04154.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Bedekar, Vishwas;Murayama, Mitsu;Mahajan, Roop L.;Priya, Shashank;
7:4:19:19     Magnetic properties of nanocrystalline KNbO3
DOI:10.1063/1.4829702  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Golovina, I. S.;Shanina, B. D.;Kolesnik, S. P.;Geifman, I. N.;Andriiko, A. A.;
7:4:19:20     Electronic structure, magnetic and electrical properties of multiferroic PbFe1/2Ta1/2O3
DOI:10.1016/j.jmmm.2011.09.030  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Bharti, Chandrahas;Dutta, Alo;Shannigrahi, Santiranjan;Sinha, T. P.;
7:4:20:1     Nanoferronics is a winning combination
DOI:10.1038/nmat3318  JN:NATURE MATERIALS  PY:2012
  TC:37  AU: Bibes, Manuel;
7:4:20:2     Atomic and Electronic Structure of the BaTiO3/Fe Interface in Multiferroic Tunnel Junctions
DOI:10.1021/nl203657c  JN:NANO LETTERS  PY:2012
  TC:43  AU: Bocher, Laura;Gloter, Alexandre;Crassous, Arnaud;Garcia, Vincent;March, Katia;Zobelli, Alberto;Valencia, Sergio;Enouz-Vedrenne, Shaima;Moya, Xavier;Marthur, Neil D.;Deranlot, Cyrile;Fusil, Stephane;Bouzehouane, Karim;Bibes, Manuel;Barthelemy, Agnes;Colliex, Christian;Stephan, Odile;
7:4:20:3     Structural Secrets of Multiferroic Interfaces
DOI:10.1103/PhysRevLett.106.087203  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:33  AU: Meyerheim, H. L.;Klimenta, F.;Ernst, A.;Mohseni, K.;Ostanin, S.;Fechner, M.;Parihar, S.;Maznichenko, I. V.;Mertig, I.;Kirschner, J.;
7:4:20:4     Ab initio study of the effects of interfacial structure on the ferroelectric, magnetic, and magnetoelectric coupling properties of Fe/BaTiO3 multiferroic tunnel junctions
DOI:10.1103/PhysRevB.89.014106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Yin, Binglun;Qu, Shaoxing;
7:4:20:5     Electric Field-Induced Oxidation of Ferromagnetic/Ferroelectric Interfaces
DOI:10.1002/adfm.201301160  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:8  AU: Couet, Sebastien;Bisht, Manisha;Trekels, Maarten;Menghini, Mariela;Petermann, Claire;Van Bael, Margriet J.;Locquet, Jean-Pierre;Rueffer, Rudolf;Vantomme, Andre;Temst, Kristiaan;
7:4:20:6     Fe/BaTiO3 interface: Band alignment and chemical properties
DOI:10.1063/1.3657769  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: Zenkevich, A.;Mantovan, R.;Fanciulli, M.;Minnekaev, M.;Matveyev, Yu.;Lebedinskii, Yu.;Thiess, S.;Drube, W.;
7:4:20:7     Absence of strain-mediated magnetoelectric coupling at fully epitaxial Fe/BaTiO3 interface (invited)
DOI:10.1063/1.4870915  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Radaelli, G.;Petti, D.;Cantoni, M.;Rinaldi, C.;Bertacco, R.;
7:4:20:8     Two dimensional growth of ultrathin Fe films on BaTiO3 with sharp chemical interface
DOI:10.1063/1.4864375  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Radaelli, G.;Cantoni, M.;Li Lijun;Espahbodi, M.;Bertacco, R.;
7:4:20:9     Microstructure of the potentially multiferroic Fe/BaTiO3 epitaxial interface
DOI:10.1080/14786435.2012.657709  JN:PHILOSOPHICAL MAGAZINE  PY:2012
  TC:1  AU: Wang, X.;Zhu, Y. L.;Wang, X. W.;Zhang, Y. Q.;Ma, X. L.;
7:4:20:10     Epitaxial growth of Fe/BaTiO3 heterostructures
DOI:10.1016/j.tsf.2010.12.193  JN:THIN SOLID FILMS  PY:2011
  TC:10  AU: Brivio, S.;Rinaldi, C.;Petti, D.;Bertacco, R.;Sanchez, F.;
7:4:20:11     Correlation between growth dynamics and dielectric properties of epitaxial BaTiO3 films
DOI:10.1063/1.3692732  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Radaelli, G.;Brivio, S.;Fina, I.;Bertacco, R.;
7:4:20:12     Tuning the Structure of Ultrathin BaTiO3 Films on Me(001) (Me = Fe, Pd, Pt) Surfaces
DOI:10.1103/PhysRevLett.111.105501  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Meyerheim, H. L.;Ernst, A.;Mohseni, K.;Maznichenko, I. V.;Henk, J.;Ostanin, S.;Jedrecy, N.;Klimenta, F.;Zegenhagen, J.;Schlueter, C.;Mertig, I.;Kirschner, J.;
7:4:20:13     First-principles calculation of x-ray absorption spectra and x-ray magnetic circular dichroism of ultrathin Fe films on BaTiO3(001)
DOI:10.1103/PhysRevB.85.134432  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: St Borek;Maznichenko, I.;Fischer, G.;Hergert, W.;Mertig, I.;Ernst, A.;Ostanin, S.;Chasse, A.;
7:4:20:14     Magnetic properties of self-assembled Fe nanoislands on BaTiO3(001)
DOI:10.1016/j.jmmm.2013.07.004  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Govind, R. K.;Babu, V. Hari;Chiang, C. -T.;Magnano, E.;Bondino, F.;Denecke, R.;Schindler, K. -M.;
7:4:20:15     Ferroelectric control of magnetic anisotropy of FePt/BaTiO3 magnetoelectric heterojunction: A density functional theory study
DOI:10.1063/1.4800499  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Lee, Minho;Choi, Heechae;Chung, Yong-Chae;
7:4:20:16     Magnetoelectric properties of the Co/PbZrxTi1-xO3 (001) interface studied from first principles
DOI:10.1103/PhysRevB.89.054436  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Borisov, V. S.;Ostanin, S.;Maznichenko, I. V.;Ernst, A.;Mertig, I.;
7:4:20:17     Effect of vacancies (O, Ti) on the interfacial bonding strength and magnetoelectricity in Fe/BaTiO3: A first-principles study
DOI:10.1016/j.commatsci.2014.06.038  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: Deng, Lei;Chen, Dong;Zhu, Yinlian;Ma, Xiuliang;
7:4:20:18     Pulsed laser deposition of ultrathin BaTiO3/Fe bi-layers: Structural characterization and piezoelectric response
DOI:10.1016/j.tsf.2011.10.188  JN:THIN SOLID FILMS  PY:2012
  TC:10  AU: Zenkevich, A.;Minnekaev, M.;Lebedinskii, Yu.;Bulakh, K.;Chouprik, A.;Baturin, A.;Mantovan, R.;Fanciulli, M.;Uvarov, O.;
7:4:20:19     Atomic and Electronic Structure of the BaTiO3/Fe Interface in Multiferroic Tunnel Junctions (vol 12, pg 376, 2012)
DOI:10.1021/nl300315t  JN:NANO LETTERS  PY:2012
  TC:0  AU: Bocher, Laura;Gloter, Alexandre;Crassous, Arnaud;Garcia, Vincent;March, Katia;Zobelli, Alberto;Valencia, Sergio;Enouz-Vedrenne, Shaima;Moya, Xavier;Mathur, Neil D.;Deranlot, Cyrile;Fusil, Stephane;Bouzehouane, Karim;Bibes, Manuel;Barthelemy, Agnes;Colliex, Christian;Stephan, Odile;
7:4:21:1     Nonlinear harmonic distortion effect in magnetoelectric laminate composites
DOI:10.1063/1.4887373  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Xu, Hao;Pei, Yongmao;Fang, Daining;Wang, Panding;
7:4:21:2     Giant magnetoelectric effect in nonlinear Metglas/PIN-PMN-PT multiferroic heterostructure
DOI:10.1063/1.4898039  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Staruch, M.;Li, J. F.;Wang, Y.;Viehland, D.;Finkel, P.;
7:4:21:3     Resonance mixing of alternating current magnetic fields in a multiferroic composite
DOI:10.1063/1.4775797  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Burdin, D. A.;Chashin, D. V.;Ekonomov, N. A.;Fetisov, Y. K.;Fetisov, L. Y.;Sreenivasulu, G.;Srinivasan, G.;
7:4:21:4     A novel frequency multiplier based on magneto electric laminate
DOI:10.1016/j.jmmm.2010.08.039  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:17  AU: Ma, Jing;Li, Zheng;Lin, Yuanhua;Nan, C. W.;
7:4:21:5     Nonlinear resonant magnetoelectric interactions and efficient frequency doubling in a ferromagnetic-ferroelectric layered structure
DOI:10.1063/1.4798579  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Fetisov, L. Y.;Fetisov, Y. K.;Sreenivasulu, G.;Srinivasan, G.;
7:4:21:6     Piezomagnetic strain-dependent non-linear magnetoelectric response enhancement by flux concentration effect
DOI:10.1063/1.4803660  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Shen, Ying;Gao, Junqi;Wang, Yaojin;Finkel, Peter;Li, Jiefang;Viehland, D.;
7:4:21:7     High non-linear magnetoelectric coefficient in Metglas/PMN-PT laminate composites under zero direct current magnetic bias
DOI:10.1063/1.4867516  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Shen, Ying;Gao, Junqi;Wang, Yaojin;Li, Jiefang;Viehland, D.;
7:4:21:8     Nonlinear magneto-electric effects in ferromagnetic-piezoelectric composites
DOI:10.1016/j.jmmm.2014.01.062  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:3  AU: Burdin, D. A.;Chashin, D. V.;Ekonomov, N. A.;Fetisov, L. Y.;Fetisov, Y. K.;Sreenivasulu, G.;Srinivasan, G.;
7:4:21:9     Frequency multiplying behavior in a magnetoelectric unimorph
DOI:10.1063/1.3678635  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Zhang, Wenhui;Yin, Ge;Cao, Jiangwei;Bai, Jianmin;Wei, Fulin;
7:4:21:10     Magnetoelectric nonlinearity in magnetoelectric laminate sensors
DOI:10.1063/1.3665130  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Shen, Liangguo;Li, Menghui;Gao, Junqi;Shen, Ying;Li, J. F.;Viehland, D.;Zhuang, X.;Sing, M. Lam Chok;Cordier, C.;Saez, S.;Dolabdjian, C.;
7:4:21:11     Magnetoelectric coupling in multiferroic laminated plates with giant magnetostrictive material layers
DOI:10.1063/1.3671400  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Zhang, C. L.;Chen, W. Q.;
7:4:21:12     Geomagnetic field tuned frequency multiplication in Metglas/Pb(Zr, Ti)O-3 heterostructure
DOI:10.1016/j.matlet.2012.08.062  JN:MATERIALS LETTERS  PY:2012
  TC:4  AU: Gao, Junqi;Shen, Ying;Finkel, Peter;Blottman, John;Li, Jiefang;Viehland, D.;
7:4:21:13     Magnetoelectric interactions in layered composites of piezoelectric quartz and magnetostrictive alloys
DOI:10.1103/PhysRevB.86.214405  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;
7:4:21:14     Tunable magnetoelectric response of dimensionally gradient laminate composites
DOI:10.1063/1.4720095  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Park, C. -S.;Avirovik, D.;Bichurin, M. I.;Petrov, V. M.;Priya, S.;
7:4:21:15     Enhancing the sensitivity of magnetoelectric sensors by increasing the operating frequency
DOI:10.1063/1.3668752  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Petrie, Jonathan;Viehland, Dwight;Gray, David;Mandal, Sanjay;Sreenivasulu, Gollapudi;Srinivasan, Gopalan;Edelstein, Alan S.;
7:4:21:16     Self-powered low noise magnetic sensor
DOI:10.1016/j.matlet.2012.05.067  JN:MATERIALS LETTERS  PY:2012
  TC:6  AU: Gao, Junqi;Wang, Zhiguang;Shen, Ying;Li, Menghui;Wang, Yaojin;Finkel, Peter;Li, Jiefang;Viehland, D.;
7:4:21:17     Enhanced sensitivity in magnetoelectric current-sensing devices with frequency up-conversion mechanism by modulating the magnetostrictive strain
DOI:10.1063/1.4862081  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhang, Jitao;Li, Ping;Wen, Yumei;He, Wei;Yang, Jin;Yang, Aichao;Lu, Caijiang;Li, Wenli;
7:4:21:18     Concurrent operational modes and enhanced current sensitivity in heterostructure of magnetoelectric ring and piezoelectric transformer
DOI:10.1063/1.4801390  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Zhang, Shengyao;Leung, Chung Ming;Kuang, Wei;Or, Siu Wing;Ho, S. L.;
7:4:22:1     Giant electric field controlled magnetic anisotropy in epitaxial BiFeO3-CoFe2O4 thin film heterostructures on single crystal Pb(Mg1/3Nb2/3)(0.7)Ti0.3O3 substrate
DOI:10.1063/1.3619836  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:24  AU: Wang, Zhiguang;Yang, Yaodong;Viswan, Ravindranath;Li, Jiefang;Viehland, D.;
7:4:22:2     Crafting the strain state in epitaxial thin films: A case study of CoFe2O4 films on Pb(Mg,Nb)O-3-PbTiO3
DOI:10.1103/PhysRevB.90.134103  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wang, Zhiguang;Wang, Yaojin;Luo, Haosu;Li, Jiefang;Viehland, D.;
7:4:22:3     Electrical and thermal control of magnetic coercive field in ferromagnetic/ferroelectric heterostructures
DOI:10.1103/PhysRevB.89.035118  JN:PHYSICAL REVIEW B  PY:2014
  TC:5  AU: Wang, Zhiguang;Zhang, Yue;Viswan, Ravindranath;Li, Yanxi;Luo, Haosu;Li, Jiefang;Viehland, D.;
7:4:22:4     Magnetoelectric Assisted 180 degrees Magnetization Switching for Electric Field Addressable Writing in Magnetoresistive Random-Access Memory
DOI:10.1021/nn503369y  JN:ACS NANO  PY:2014
  TC:7  AU: Wang, Zhiguang;Zhang, Yue;Wang, Yaojin;Li, Yanxi;Luo, Haosu;Li, Jiefang;Viehland, Dwight;
7:4:22:5     Domain rotation induced strain effect on the magnetic and magneto-electric response in CoFe2O4/Pb(Mg,Nb)O-3-PbTiO3 heterostructures
DOI:10.1063/1.3684546  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Wang, Zhiguang;Viswan, Ravindranath;Hu, Bolin;Li, Jie-Fang;Harris, V. G.;Viehland, D.;
7:4:22:6     Engineered Magnetic Shape Anisotropy in BiFeO3-CoFe2O4 Self-Assembled Thin Films
DOI:10.1021/nn4003506  JN:ACS NANO  PY:2013
  TC:14  AU: Wang, Zhiguang;Li, Yanxi;Viswan, Ravindranath;Hu, Bolin;Harris, Vincent G.;Li, Jiefang;Viehland, Dwight;
7:4:22:7     Magnetoelectric effect in crystallographically textured BaTiO3 films deposited on ferromagnetic metallic glass foils
DOI:10.1063/1.3544352  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Wang, Zhiguang;Yan, Li;Yang, Yaodong;Li, Jie-Fang;Das, Jaydip;Geiler, Anton L.;Yang, Aria;Chen, Yajie;Harris, V. G.;Viehland, D.;
7:4:22:8     Controlled growth of epitaxial BiFeO3 films using self-assembled BiFeO3-CoFe2O4 multiferroic heterostructures as a template
DOI:10.1063/1.4734508  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Li, Yanxi;Yang, Yaodong;Yao, Jianjun;Viswan, Ravindranath;Wang, Zhiguang;Li, Jiefang;Viehland, D.;
7:4:22:9     Volatile and nonvolatile magnetic easy-axis rotation in epitaxial ferromagnetic thin films on ferroelectric single crystal substrates
DOI:10.1063/1.4823539  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Wang, Z.;Wang, Y.;Ge, W.;Li, J.;Viehland, D.;
7:4:22:10     Annealing control of magnetic anisotropy and phase separation in CoFe2O4-BaTiO3 nanocomposite films
DOI:10.1063/1.4849915  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Rafique, Mohsin;Herklotz, A.;Guo, E. -J.;Roth, R.;Schultz, L.;Doerr, K.;Manzoor, Sadia;
7:4:22:11     Epitaxial BiFe0.95Mn0.05O3 thin films on transparent La0.07Ba0.93SnO3 electrodes
DOI:10.1016/j.jallcom.2013.07.158  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Liu, Qinzhuang;Li, Hong;Fan, Lele;
7:4:22:12     Electric-field induced strain modulation of magnetization in Fe-Ga/Pb(Mg1/3Nb2/3)-PbTiO3 magnetoelectric heterostructures
DOI:10.1063/1.4866495  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Zhang, Yue;Wang, Zhiguang;Wang, Yaojin;Luo, Chengtao;Li, Jiefang;Viehland, Dwight;
7:4:22:13     Multi-orientation patterned deposition of BaTiO(3) thin films using an Au buffer layer
DOI:10.1016/j.tsf.2010.05.108  JN:THIN SOLID FILMS  PY:2010
  TC:5  AU: Yang, Yaodong;Yao, Jianjun;Li, Jiefang;Das, Jaydip;Viehland, D.;
7:4:22:14     Self-assembled NaNbO3-Nb2O5 (ferroelectric-semiconductor) heterostructures grown on LaAlO3 substrates
DOI:10.1063/1.4754713  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Wang, Zhiguang;Li, Yanxi;Chen, Bo;Viswan, Ravindranath;Li, Jie-Fang;Viehland, D.;
7:4:22:15     When Pt meets BaTiO3: Interaction between metal nanoparticles and oxide thin films
DOI:10.1016/j.matlet.2011.01.056  JN:MATERIALS LETTERS  PY:2011
  TC:1  AU: Yang, Yaodong;Yao, Jianjun;Li, Jie-Fang;Viehland, D.;
7:4:22:16     Nanostructures in perovskite-ferrite two-phase composite epitaxial thin films
DOI:10.1080/14786430902967702  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:4  AU: Yan, Li;Bai, Feiming;Li, Jiefang;Viehland, D.;
7:4:23:1     Functional properties of BaTiO3-Ni0.5Zn0.5Fe2O4 magnetoelectric ceramics prepared from powders with core-shell structure
DOI:10.1063/1.3340844  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:36  AU: Curecheriu, L. P.;Buscaglia, M. T.;Buscaglia, V.;Mitoseriu, L.;Postolache, P.;Ianculescu, A.;Nanni, P.;
7:4:23:2     Formation of Sol-Gel In Situ Derived BTO/NZFO Composite Ceramics with Considerable Dielectric and Magnetic Properties
DOI:10.1111/jace.12181  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:13  AU: Xiao, Bin;Dong, Yanling;Ma, Ning;Du, Piyi;
7:4:23:3     Multi-field susceptible high-f(c) ceramic composite with atypical topological microstructure and extraordinary electromagnetic properties
DOI:10.1039/c4tc01317d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:2  AU: Xiao, Bin;Zheng, Wan;Zhu, Mingkai;Zhao, Wenjia;Ma, Ning;Du, Piyi;
7:4:23:4     Dielectric, magnetic and magnetoelectric properties of Ni0.5Zn0.5Fe2O4+Pb(Zr0.48Ti0.52)O-3 composite ceramics
DOI:10.1016/j.ceramint.2013.11.027  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Zhang, Yuxiang;Zhou, Jian-Ping;Liu, Qian;Zhang, Saihuan;Deng, Chao-Yong;
7:4:23:5     Structural, dielectric, ferromagnetic, ferroelectric and ac conductivity studies of the BaTiO3-CoFe1.8Zn0.2O4 multiferroic particulate composites
DOI:10.1016/j.ceramint.2014.01.115  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Sharma, Richa;Pahuja, Poonam;Tandon, R. P.;
7:4:23:6     Polarization relaxation mechanism of Ba0.6Sr0.4TiO3/Ni0.8Zn0.2Fe2O4 composite with giant dielectric constant and high permeability
DOI:10.1063/1.3490782  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:24  AU: Yang, Haibo;Wang, Hong;He, Li;Shui, Li;Yao, Xi;
7:4:23:7     Percolative NZFO/BTO ceramic composite with magnetism threshold
DOI:10.1039/c3tc30807c  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:9  AU: Xiao, Bin;Ma, Ning;Du, Piyi;
7:4:23:8     Hexagonal BaTiO3/Ni0.8Zn0.2Fe2O4 composites with giant dielectric constant and high permeability
DOI:10.1016/j.matchemphys.2012.03.068  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:8  AU: Yang, Haibo;Wang, Hong;He, Li;Yao, Xi;
7:4:23:9     Nano conductive particle dispersed percolative thin film ceramics with high permittivity and high tunability
DOI:10.1063/1.3699012  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Wang, Zongrong;Hu, Tao;Li, Xiaoge;Han, Gaorong;Weng, Wenjian;Ma, Ning;Du, Piyi;
7:4:23:10     DC conductivity and magnetic properties of piezoelectric-piezomagnetic composite system
DOI:10.1016/j.jmmm.2012.07.028  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:7  AU: Hemeda, O. M.;Tawfik, A.;A-Al-Sharif;Amer, M. A.;Kamal, B. M.;El Refaay, D. E.;Bououdina, M.;
7:4:23:11     Dielectric, ferromagnetic and maganetoelectric properties of BaTiO3-Ni0.7Zn0.3Fe2O4 composite ceramics
DOI:10.1016/j.materresbull.2013.06.026  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:5  AU: Zhang, Rong-Fen;Deng, Chao-Yong;Ren, Li;Li, Zheng;Zhou, Jian-Ping;
7:4:23:12     Initial permeability of percolative PbTiO3/NiFe2O4 composite ceramics by a sol-gel in situ process
DOI:10.1039/c0jm01506g  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:11  AU: Zhang, Xuhui;Zhu, Lu;Dong, Yanling;Weng, Wenjian;Han, Gaorong;Ma, Ning;Du, Piyi;
7:4:23:13     Ferroelectric/ferrimagnetic composite ceramics with depressed interfacial reaction and low dielectric loss
DOI:10.1063/1.4899080  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zheng, Hui;Weng, Wenjian;Han, Gaorong;Du, Piyi;
7:4:23:14     Low-temperature sintering and properties of Bi4Ti3O12/Ni0.37Cu0.20Zn0.43Fe1.92O3.88 composites
DOI:10.1016/j.jallcom.2012.11.056  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Yang, Haibo;Yang, Yanyan;Lu, Ling;Lin, Ying;
7:4:23:15     Ferroelectric/ferromagnetic ceramic composite and its hybrid permittivity stemming from hopping charge and conductivity inhomogeneity
DOI:10.1063/1.4781100  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:13  AU: Zheng, Hui;Li, Lu;Xu, Zhaojun;Weng, Wenjian;Han, Gaorong;Ma, Ning;Du, Piyi;
7:4:23:16     Ferroelectric, Ferromagnetic, and Magnetoelectric Properties of Multiferroic Ni0.5Zn0.5Fe2O4-BaTiO3 Composite Ceramics
DOI:10.1007/s11664-013-2904-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Zhang, Rong-Fen;Deng, Chao-Yong;Ren, Li;Li, Zheng;Zhou, Jian-Ping;
7:4:23:17     Ferroelectric/ferrimagnetic composite ceramics with depressed interfacial reaction and low dielectric loss (vol 105, 162902, 2014)
DOI:10.1063/1.4902029  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zheng, Hui;Weng, Wenjian;Han, Gaorong;Du, Piyi;
7:4:23:18     Bi4Ti3O12-(Ni0.5Zn0.5)Fe2O4 dielectric-ferromagnetic ceramic composites synthesized with nanopowders
DOI:10.1016/j.matchemphys.2010.06.016  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:3  AU: Guo, Yiping;Feng, Sha;Wang, Neng;Wang, Boyuan;Gu, Mingyuan;
7:4:24:1     Quasi-one-dimensional miniature multiferroic magnetic field sensor with high sensitivity at zero bias field
DOI:10.1063/1.3617434  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:21  AU: Chen, Yajie;Gillette, Scott M.;Fitchorov, Trifon;Jiang, Liping;Hao, Hongbo;Li, Jiheng;Gao, Xuexu;Geiler, Anton;Vittoria, C.;Harris, V. G.;
7:4:24:2     Electrically controlled magnetization switching in a multiferroic heterostructure
DOI:10.1063/1.3475417  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:31  AU: Chen, Yajie;Fitchorov, Trifon;Vittoria, Carmine;Harris, V. G.;
7:4:24:3     Multiferroic heterostructure fringe field tuning of meander line microstrip ferrite phase shifter
DOI:10.1063/1.3309592  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:25  AU: Geiler, A. L.;Gillette, S. M.;Chen, Y.;Wang, J.;Chen, Z.;Yoon, S. D.;He, P.;Gao, J.;Vittoria, C.;Harris, V. G.;
7:4:24:4     Epitaxial growth of Pb(Zr0.53Ti0.47)O-3 films on Pt coated magnetostrictive amorphous metallic substrates toward next generation multiferroic heterostructures
DOI:10.1063/1.3697605  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Hu, B.;Chen, Y.;Yang, A.;Gillette, S.;Fitchorov, T.;Geiler, A.;Daigle, A.;Su, X. D.;Wang, Z.;Viehland, D.;Harris, V. G.;
7:4:24:5     Microwave magnetoelectric coupling and ferromagnetic resonance frequency tuning of a Co2MnSb/GaAs/PZN-PT heterostructure
DOI:10.1103/PhysRevB.83.104406  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Chen, Yajie;Yang, Aria;Paudel, Moti R.;Stadler, Shane;Vittoria, C.;Harris, V. G.;
7:4:24:6     Tunable fringe magnetic fields induced by converse magnetoelectric coupling in a FeGa/PMN-PT multiferroic heterostructure
DOI:10.1063/1.3672822  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Fitchorov, Trifon;Chen, Yajie;Hu, Bolin;Gillette, Scott M.;Geiler, Anton;Vittoria, Carmine;Harris, Vincent G.;
7:4:24:7     Electronic tuning of magnetic permeability in Co(2)Z hexaferrite toward high frequency electromagnetic device miniaturization
DOI:10.1063/1.3590771  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Chen, Yajie;Daigle, Andrew;Fitchorov, Trifon;Hu, Bolin;Geiler, Michael;Geiler, Anton;Vittoria, C.;Harris, V. G.;
7:4:24:8     Dynamic response of converse magnetoelectric effect in a PMN-PT-based multiferroic heterostructure
DOI:10.1007/s00339-010-5726-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:11  AU: Chen, Yajie;Fitchorov, Trifon;Geiler, Anton L.;Gao, Jinsheng;Vittoria, Carmine;Harris, Vincent G.;
7:4:24:9     Thermally driven large magnetoresistance and magneto striction in multifunctional magnetic FeGa-Tb alloys
DOI:10.1016/j.actamat.2014.03.053  JN:ACTA MATERIALIA  PY:2014
  TC:2  AU: Fitchorov, Trifon I.;Bennett, Steven;Jiang, Liping;Zhang, Guangrui;Zhao, Zengqi;Chen, Yajie;Harris, Vincent G.;
7:4:24:10     Piezoelectric properties of epitaxial Pb(Zr-0.525, Ti-0.475)O-3 films on amorphous magnetic metal substrates
DOI:10.1063/1.3677864  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Hu, B.;Chen, Y.;Yang, A.;Gillete, S.;Fitchorov, Trifon;Geiler, A.;Daigle, A.;Su, X. D.;Wang, Z.;Viehland, D.;Vittoria, C.;Harris, V. G.;
7:4:24:11     Effects of intrinsic magnetostriction on tube-topology magnetoelectric sensors with high magnetic field sensitivity
DOI:10.1063/1.4868326  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Gillette, Scott M.;Fitchorov, Trifon;Obi, Ogheneyunume;Jiang, Liping;Hao, Hongbo;Wu, Shuangxia;Chen, Yajie;Harris, Vincent G.;
7:4:24:12     Giant enhancement in the magnetostrictive effect of FeGa alloys doped with low levels of terbium
DOI:10.1063/1.4809829  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Jiang, Liping;Yang, Jiandong;Hao, Hongbo;Zhang, Guangrui;Wu, Shuangxia;Chen, Yajie;Obi, Ogheneyunume;Fitchorov, Trifon;Harris, Vincent G.;
7:4:24:13     Dynamic state switching in nonlinear multiferroic cantilevers
DOI:10.1063/1.4738991  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Onuta, Tiberiu-Dan;Wang, Yi;Long, Christian J.;Lofland, Samuel E.;Takeuchi, Ichiro;
7:4:24:14     Temperature dependence of the magnetostriction of stress annealed Galfenol measured under tension
DOI:10.1063/1.3357401  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Restorff, J. B.;Wun-Fogle, M.;
7:4:24:15     Active tuning of a microstrip hairpin-line microwave bandpass filter on a polycrystalline yttrium iron garnet substrate using small magnetic fields
DOI:10.1063/1.3556696  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Gillette, S. M.;Geiler, A. L.;Chen, Z.;Chen, Y.;Arruda, T.;Xie, C.;Wang, L.;Zhu, X.;Liu, M.;Mukerjee, S.;Vittoria, C.;Harris, V. G.;
7:4:24:16     Effect of heat treatment on the properties of Metglas foils, and laminated magnetoelectric composites made thereof
DOI:10.1016/j.materresbull.2010.10.015  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:3  AU: Yang, Yaodong;Gao, Junqi;Wang, Zhiguang;Li, Menghui;Li, Jie-Fang;Das, Jaydip;Viehland, D.;
7:4:25:1     Observation of multiferroic properties and magnetoelectric effect in (x) CoFe2O4 -(1-x) Pb0.7Ca0.3TiO3 composites
DOI:10.1016/j.jallcom.2013.08.087  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:9  AU: Sharma, Anshu;Kotnala, R. K.;Negi, N. S.;
7:4:25:2     Investigation on impedance response, magnetic and ferroelectric properties of 0.20(Co1-xZnxFe2-yMnyO4)-0.80(Pb0.70Ca0.30TiO3) magnetoelectric composites
DOI:10.1016/j.matchemphys.2014.09.051  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Negi, N. S.;Sharma, Anshu;Shah, J.;Kotnala, R. K.;
7:4:25:3     Co0.7Mg0.3Fe2-xMnxO4-Sr0.5Ba0.5Nb2O6 magnetoelectric composites
DOI:10.1016/j.jallcom.2009.11.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:22  AU: Jigajeni, S. R.;Kulkarni, S. V.;Kolekar, Y. D.;Kulkarni, S. B.;Joshi, P. B.;
7:4:25:4     Synthesis and characterization of microwave sintered ferromagnetic-ferroelectric perovskite composites
DOI:10.1016/j.ceramint.2014.05.077  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Dang-Hyok, Yoon;Raju, Kati;Bong-Ki, Min;Reddy, Paduru Venugopal;
7:4:25:5     The converse magnetoelectric characteristics of Mn and Mg doped CoFe2O4-PbTiO3 composites
DOI:10.1063/1.4867347  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Liu, Ting-ting;Wang, Zhi;Mao, Jun;Cheng, Ning-ning;Ni, Li-jun;
7:4:25:6     Dielectric and magnetoelectric properties of BaTiO3-Co0.6Zn0.4Fe1.7Mn0.3O4 composite
DOI:10.1016/j.jeurceramsoc.2012.11.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:16  AU: Gupta, Arti;Chatterjee, Ratnamala;
7:4:25:7     Improved magnetoelectric coupling in Mn and Zn doped CoFe2O4-PbZr0.52Ti0.48O3 particulate composite
DOI:10.1063/1.3562949  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:14  AU: Gupta, Arti;Huang, A.;Shannigrahi, Santiranjan;Chatterjee, Ratnamala;
7:4:25:8     Electrical, magnetic, and magnetoelectric characterization of fine-grained Pb(Zr0.53Ti0.47)O-3-(Ni0.5Zn0.5)Fe2O4 composite ceramics
DOI:10.1016/j.jallcom.2011.03.071  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:12  AU: Zhang, Hong-fang;Or, Siu Wing;Chan, Helen Lai Wa;
7:4:25:9     Magnetic, magnetoelectric and dielectric behavior of CoFe2O4-Pb (Fe1/2Nb1/2)O-3 particulate and layered composites
DOI:10.1016/j.jmmm.2012.04.056  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:9  AU: Kulawik, J.;Szwagierczak, D.;Guzdek, P.;
7:4:25:10     Dielectric and magnetic properties of xCoFe(2)O(4)-(1-x)[0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3] composites
DOI:10.1016/j.materresbull.2014.09.013  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Rani, Jyoti;Yadav, K. L.;Prakash, Satya;
7:4:25:11     Multiferroic thin film composite of Pb(Zr0.95Ti0.05)O-3/CoFe2O4 on Si and SrTiO3 substrates
DOI:10.1016/j.tsf.2013.04.042  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Tahmasebi, K.;Barzegar, A.;Ding, J.;Herng, T. S.;Huang, L.;Huang, A.;Shannigrahi, S.;
7:4:25:12     Dielectric, ferroelectric, magnetic and magnetoelectric properties of 0.1Ni(0.8)Zn(0.2)Fe(2)O(4)-0.9Pb(1-3x/2)Sm(x)Zr(0.65)Ti(0.35)O(3)
DOI:10.1016/j.ceramint.2013.03.045  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Rani, Rekha;Juneja, J. K.;Singh, Sangeeta;Raina, K. K.;Prakash, Chandra;
7:4:25:13     Study of 0.1Ni(0.8)Zn(0.2)Fe(2)O(4)-0.9Pb(1-3x/2)La(x)Zr(0.65)Ti(0.35)O(3) magnetoelectric composites
DOI:10.1016/j.jmmm.2012.08.011  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:9  AU: Rani, Rekha;Juneja, J. K.;Singh, Sangeeta;Raina, K. K.;Prakash, Chandra;
7:4:25:14     Magnetoelectric response and dielectric property of multiferroic Co0.65Zn0.35Fe2O4-PbZr0.52Ti0.48O3 nanocomposites
DOI:10.1007/s00339-013-7691-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:3  AU: Mandal, P. R.;Nath, T. K.;
7:4:25:15     Structural, spectral and dielectric properties of piezoelectric-piezomagnetic composites
DOI:10.1016/j.jmmm.2012.03.055  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:6  AU: Hemeda, O. M.;Tawfik, A.;Amer, M. A.;Kamal, B. M.;El Refaay, D. E.;
7:4:25:16     Structural, electric and magnetoelectric properties of Ni0.85Cu0.15Fe2O4/BiFe0.7Mn0.3O3 multiferroic nanocomposites
DOI:10.1016/j.jallcom.2013.06.012  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Ahmed, M. A.;Mansour, S. F.;Afifi, M.;
7:4:25:17     Piezoelectric, dielectric and magnetic properties of (1-x)Pb[Zr, Ti, (Mg1/2W1/2), (Ni1/3Nb2/3)]O-3+x(Ni, Co, Cu)FeO4 composites
DOI:10.1016/j.jmmm.2011.02.048  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:6  AU: Chao, Xiaolian;Yang, Zupei;Dong, Mingyuan;Zhang, Yi;
7:4:25:18     Study of electrical properties and the magnetoelectric effect in Ni0.2Co0.8Fe2O4 + PbZr0.8Ti0.2O3 particulate composites
DOI:10.1088/0964-1726/20/4/045005  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:3  AU: Bammannavar, B. K.;Naik, L. R.;Kotnala, R. K.;
7:4:25:19     Magnetic, ferroelectric and magnetoelectric coupling properties of Fe-implanted BaTiO3 films
DOI:10.1016/j.tsf.2010.11.022  JN:THIN SOLID FILMS  PY:2011
  TC:5  AU: Ye, X. J.;Zhou, Z. Z.;Zhong, W.;Hou, D. L.;Cao, H. T.;Au, C. T.;Du, Y. W.;
7:4:25:20     Structural, Dielectric and Piezoelectric Properties of PLZT (x/60/40) Ceramics
DOI:10.1080/10584587.2010.495671  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Thakur, O. P.;Prakash, Chandra;
7:4:25:21     Studies on Structural and Dielectric Properties of CMFO Ferrite and BZT Ferroelectric Magnetoelectric Composites
DOI:10.1080/10584587.2010.491765  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:3  AU: Kambale, R. C.;Shaikh, P. A.;Rajpure, K. Y.;Joshi, P. B.;Kolekar, Y. D.;
7:4:25:22     Polarization Switching Behaviour of Metallo-Organic Decomposition Processed (Pb0.60Ca0.40)TiO3 Thin Film Capacitors
DOI:10.1080/10584587.2010.495669  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Negi, N. S.;Rastogi, A. C.;
7:4:25:23     Investigations on Magnetoelectric and Magnetodielectric Properties of CMFO-PBT Composites
DOI:10.1007/s11664-013-2529-8  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:2  AU: Salunkhe, S. M.;Jigajeni, S. R.;Tarale, A. N.;Sutar, M. M.;Joshi, P. B.;
7:4:25:24     Study of magnetic properties and magnetoelectric effect in (x) Ni0.5Zn0.5Fe2O4+(1-x)PZT composites
DOI:10.1016/j.jmmm.2011.09.016  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:4  AU: Bammannavar, B. K.;Naik, L. R.;
7:4:25:25     Structural, magnetic and transport properties of magnetoelectric composites
DOI:10.1016/j.jmmm.2013.06.004  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Rahman, M. Azizar;Gafur, M. A.;Hossain, A. K. M. Akther;
7:4:26:1     Converse magnetoelectric effect in laminated composite of Metglas and Pb(Zr,Ti)O-3 with screen-printed interdigitated electrodes
DOI:10.1063/1.4881726  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Zhang, Yuan;Liu, Guoxi;Shi, Huaduo;Li, Meiya;Dong, Shuxiang;
7:4:26:2     Colossal low-frequency resonant magnetomechanical and magnetoelectric effects in a three-phase ferromagnetic/elastic/piezoelectric composite
DOI:10.1063/1.4756919  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:15  AU: Liu, Guoxi;Li, Xiaotian;Chen, Jianguo;Shi, Huaduo;Xiao, Wenlei;Dong, Shuxiang;
7:4:26:3     Energy harvesting from ambient low-frequency magnetic field using magneto-mechano-electric composite cantilever
DOI:10.1063/1.4862876  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:9  AU: Liu, Guoxi;Ci, Penghong;Dong, Shuxiang;
7:4:26:4     Magnetoelectric effect in magnetostrictive/piezoelectric laminated composite operating in shear-shear mode
DOI:10.1063/1.4892988  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Liu, Guoxi;Zhang, Chunli;Dong, Shuxiang;
7:4:26:5     A wideband magnetic energy harvester
DOI:10.1063/1.3360218  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Zhang, C. L.;Chen, W. Q.;
7:4:26:6     A tunable ring-type magnetoelectric inductor
DOI:10.1063/1.3504218  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Liu, Guoxi;Cui, Xiaoxi;Dong, Shuxiang;
7:4:26:7     Large electrical manipulation of permittivity in BaTiO3 and Pb(Zr,Ti)O-3 bimorph heterostructure
DOI:10.1063/1.4893614  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ci, Penghong;Zhang, Li;Liu, Guoxi;Dong, Shuxiang;
7:4:26:8     Giant magnetoelectric torque effect and multicoupling in two phases ferromagnetic/piezoelectric system
DOI:10.1063/1.3662912  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Xing, Zengping;Xu, Kai;Dai, Guangyu;Li, Jiefang;Viehland, Dwight;
7:4:26:9     A magneto-mechano-electric coupling equivalent circuit of piezoelectric bimorph/magnets composite cantilever
DOI:10.1063/1.4867177  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Liu, Guoxi;Dong, Shuxiang;
7:4:26:10     Magnetic energy harvesting properties of piezofiber bimorph/NdFeB composites
DOI:10.1063/1.4867889  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Han, Jinchi;Hu, Jun;Wang, Shan X.;He, Jinliang;
7:4:26:11     Enhanced electrical manipulation of magnetic susceptibility in ferromagnetic amorphous alloy and piezoelectric bimorph heterostructure
DOI:10.1063/1.4817919  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Liu, Guoxi;Zhang, Yuan;Ci, Penghong;Dong, Shuxiang;
7:4:26:12     The effect of field-orientation on the magnetoelectric coupling in Terfenol-D/PZT/Terfenol-D laminated structure
DOI:10.1063/1.4901069  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Chen, Zhengxin;Su, Yu;Meguid, S. A.;
7:4:26:13     Theoretical analysis on low frequency magneto-mechano-electric coupling behavior in piezo-unimorph/magnet composite
DOI:10.1063/1.4874175  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Liu, Guoxi;Ci, Penghong;Dong, Shuxiang;
7:4:26:14     Magnetoelectric effect at thickness shear mode in ferrite-piezoelectric bilayer
DOI:10.1063/1.4819477  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Bichurin, M. I.;Petrov, R. V.;Petrov, V. M.;
7:4:26:15     Eddy-current effect on resonant magnetoelectric coupling in magnetostrictive-piezoelectric laminated composites
DOI:10.1063/1.4812218  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Liu, Guoxi;Zhang, Chunli;Chen, Weiqiu;Dong, Shuxiang;
7:4:27:1     Studies on magnetoelectric coupling in PFN-NZFO composite at room temperature
DOI:10.1063/1.4875661  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Pradhan, Dhiren K.;Sahoo, Satyaprakash;Barik, Sujit K.;Puli, Venkata S.;Misra, Pankaj;Katiyar, Ram S.;
7:4:27:2     Magnetoimpedance spectroscopy of epitaxial multiferroic thin films
DOI:10.1103/PhysRevB.86.035113  JN:PHYSICAL REVIEW B  PY:2012
  TC:17  AU: Schmidt, Rainer;Ventura, Jofre;Langenberg, Eric;Nemes, Norbert M.;Munuera, Carmen;Varela, Manuel;Garcia-Hernandez, Mar;Leon, Carlos;Santamaria, Jacobo;
7:4:27:3     Room temperature multiferroic properties of Pb(Fe0.5Nb0.5)O-3-Co0.65Zn0.35Fe2O4 composites
DOI:10.1063/1.4847595  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Pradhan, Dhiren K.;Puli, Venkata S.;Tripathy, Satya Narayan;Pradhan, Dillip K.;Scott, J. F.;Katiyar, Ram S.;
7:4:27:4     Ferroelectric and magnetic properties of ferroelectromagnetic PbFe1/2Nb1/2O3 type ceramics
DOI:10.1016/j.jmmm.2010.09.046  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:24  AU: Bochenek, D.;Guzdek, P.;
7:4:27:5     Effect of grain size on the magnetic properties of superparamagnetic Ni0.5Zn0.5Fe2O4 nanoparticles by co-precipitation process
DOI:10.1016/j.jmmm.2011.02.002  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:20  AU: Chen, D. G.;Tang, X. G.;Wu, J. B.;Zhang, W.;Liu, Q. X.;Jiang, Y. P.;
7:4:27:6     Investigations on electrical and magnetic properties of multiferroic [(1-x)Pb(Fe0.5Nb0.5)O(3)xNi(0.65)Zn(0.35)Fe(2)O(4)] composites
DOI:10.1063/1.4799414  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Pradhan, Dhiren K.;Barik, Sujit K.;Sahoo, Satyaprakash;Puli, Venkata S.;Katiya, R. S.;
7:4:27:7     Studies on structural, dielectric, and transport properties of Ni0.65Zn0.35Fe2O4
DOI:10.1063/1.4885420  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Pradhan, Dhiren K.;Misra, Pankaj;Puli, Venkata S.;Sahoo, Satyaprakash;Pradhan, Dillip K.;Katiyar, Ram S.;
7:4:27:8     Observation of direct and indirect magnetoelectricity in lead free ferroelectric (Na0.5Bi0.5TiO3)-magnetostrictive (CoFe2O4) particulate composite
DOI:10.1063/1.4745840  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Srinivas, A.;Krishnaiah, R. V.;Karthik, T.;Suresh, P.;Asthana, Saket;Kamat, S. V.;
7:4:27:9     Phase transition and magneto-electric coupling of BiFeO3-YMnO3 multiferroic nanoceramics
DOI:10.1063/1.4824061  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Tripathy, Satya Narayan;Mishra, K. K.;Sen, S.;Mishra, B. G.;Pradhan, Dhiren K.;Palai, R.;Pradhan, Dillip K.;
7:4:27:10     Characterization of Bi4Pb2Ti3FeNbO18 nanoplates
DOI:10.1016/j.jallcom.2014.06.159  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Kumar, Nawnit;Patri, S. K.;Choudhary, R. N. P.;
7:4:27:11     Impedance response and dielectric relaxation in co-precipitation derived ferrite (Ni,Zn)Fe2O4 ceramics
DOI:10.1063/1.4809541  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Chen, D. G.;Tang, X. G.;Liu, Q. X.;Jiang, Y. P.;Ma, C. B.;Li, R.;
7:4:27:12     Structural and dielectric characterization on multiferroic xNi(0.9)Zn(0.1)Fe(2)O(4)/(1-x)PbZr0.52Ti0.48O3 particulate composite
DOI:10.1016/j.jallcom.2014.01.007  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Pandey, Rishikesh;Meena, Braj Raj;Singh, Akhilesh Kumar;
7:4:27:13     Structural, microstructural and magneto-electric properties of single-phase BiFeO3 nanoceramics prepared by auto-combustion method
DOI:10.1016/j.matchemphys.2013.05.040  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:9  AU: Tripathy, Satya Narayan;Mishra, B. G.;Shirolkar, Mandar M.;Sen, S.;Das, Suprem R.;Janes, David B.;Pradhan, Dillip K.;
7:4:27:14     The PZT system (PbTixZr1-xO3, 0 <= x <= 1.0): Dielectric response of solid solutions in broad temperature (10 <= T <= 1000 K) and frequency (10(-2) <= f <= 10(7) Hz) ranges (Part 4)
DOI:10.1016/j.ceramint.2012.10.246  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Andryushina, I. N.;Reznichenko, L. A.;Shmytko, I. M.;Shilkina, L. A.;Andryushin, K. P.;Yurasov, Yu. I.;Dudkina, S. I.;
7:4:27:15     Effects of tantalum doping on microstructure and ferroelectric properties of Bi4Ti3O12 thin films prepared by a sol-gel method
DOI:10.1016/j.jcrysgro.2011.11.033  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:3  AU: Kao, M. C.;Chen, H. Z.;Young, S. L.;Chuang, B. N.;Jiang, W. W.;Song, J. S.;Jhan, S. S.;Chiang, J. L.;Wu, L. T.;
7:4:28:1     Magnetic effects on dielectric and polarization behavior of multiferroic heterostructures
DOI:10.1063/1.3327889  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:24  AU: Dussan, Sandra;Kumar, Ashok;Scott, J. F.;Katiyar, Ram S.;
7:4:28:2     Interfacial engineering and coupling of electric and magnetic properties in Pb(Zr0.53Ti0.47)O-3/CoFe2O4 multiferroic epitaxial multilayers
DOI:10.1063/1.3386510  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:29  AU: Zhang, J. X.;Dai, J. Y.;Chan, H. L. W.;
7:4:28:3     Challenges in the stoichiometric growth of polycrystalline and epitaxial PbZr0.52Ti0.48O3/La0.7Sr0.3MnO3 multiferroic heterostructures using pulsed laser deposition
DOI:10.1063/1.4751027  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Mukherjee, Devajyoti;Hyde, Robert;Hordagoda, Mahesh;Bingham, Nicholas;Srikanth, Hariharan;Witanachchi, Sarath;Mukherjee, Pritish;
7:4:28:4     Device performance of ferroelectric/correlated oxide heterostructures for non-volatile memory applications
DOI:10.1088/0957-4484/22/25/254014  JN:NANOTECHNOLOGY  PY:2011
  TC:26  AU: Hoffman, J.;Hong, X.;Ahn, C. H.;
7:4:28:5     Electronic transport in (La,Sr)MnO3-ferroelectric-(La,Sr)MnO3 epitaxial structures
DOI:10.1063/1.4808335  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Boni, A. G.;Pintilie, I.;Pintilie, L.;Preziosi, D.;Deniz, H.;Alexe, M.;
7:4:28:6     Enhanced magnetism and ferroelectricity in epitaxial Pb(Zr0.52Ti0.48)O-3/CoFe2O4/La0.7Sr0.3MnO3 multiferroic heterostructures grown using dual-laser ablation technique
DOI:10.1063/1.4863165  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Mukherjee, Devajyoti;Hordagoda, Mahesh;Lampen, Paula;Manh-Huong Phan;Srikanth, Hariharan;Witanachchi, Sarath;Mukherjee, Pritish;
7:4:28:7     Nanocolumnar Interfaces and Enhanced Magnetic Coercivity in Preferentially oriented Cobalt Ferrite Thin Films Grown Using Oblique-Angle Pulsed Laser Deposition
DOI:10.1021/am401771z  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:7  AU: Mukherjee, Devajyoti;Hordagoda, Mahesh;Hyde, Robert;Bingham, Nicholas;Srikanth, Hariharan;Witanachchi, Sarath;Mukherjee, Pritish;
7:4:28:8     Multiferroic properties of Bi3.15Nd0.85Ti3O12-CoFe2O4 bilayer films derived by a sol-gel processing
DOI:10.1016/j.jallcom.2011.01.124  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Yang, Bin;Li, Zheng;Gao, Ya;Lin, Yuanhua;Nan, Ce-Wen;
7:4:28:9     Role of dual-laser ablation in controlling the Pb depletion in epitaxial growth of Pb(Zr0.52Ti0.48)O-3 thin films with enhanced surface quality and ferroelectric properties
DOI:10.1063/1.3694035  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Mukherjee, Devajyoti;Hyde, Robert;Mukherjee, Pritish;Srikanth, Hariharan;Witanachchi, Sarath;
7:4:28:10     Role of dual-laser ablation in controlling the Pb depletion in epitaxial growth of Pb(Zr0.52Ti0.48)O-3 thin films with enhanced surface quality and ferroelectric properties (vol 111, 064102, 2012)
DOI:10.1063/1.4704981  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Mukherjee, Devajyoti;Hyde, Robert;Mukherjee, Pritish;Srikanth, Hariharan;Witanachchi, Sarath;
7:4:28:11     Structural, electrical and dielectric properties of La0.7Sr0.3MnO3-ErMnO3 multiferroic composites
DOI:10.1016/j.mseb.2013.11.014  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:1  AU: Mandal, S. K.;Dey, P.;Nath, T. K.;
7:4:28:12     Dielectric Property of 0.45NiFe2O4+0.55BaTiO3 Ceramic Composites
DOI:10.1080/10584587.2012.737230  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Liu, Q. X.;Tong, J. J.;Tang, X. G.;Jiang, Y. P.;
7:4:28:13     Nonlinear transport in nanoscale phase separated colossal magnetoresistive oxide thin films
DOI:10.1063/1.4890605  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Singh, V. R.;Zhang, L.;Rajapitamahuni, A. K.;Devries, N.;Hong, X.;
7:4:29:1     Magnetodielectric effect and electric-induced magnetic permeability in magnetoelectric laminate composite under low inspiring signal
DOI:10.1063/1.4780828  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Zhou, Jian-Ping;Zhang, Yu-Xiang;Zhang, Guang-Bin;Liu, Peng;
7:4:29:2     Thermodynamic theory of strain-mediated direct magnetoelectric effect in multiferroic film-substrate hybrids
DOI:10.1088/0957-4484/21/26/265701  JN:NANOTECHNOLOGY  PY:2010
  TC:17  AU: Kukhar, V. G.;Pertsev, N. A.;Kholkin, A. L.;
7:4:29:3     Giant magnetocapacitance of strained ferroelectric-ferromagnetic hybrids
DOI:10.1103/PhysRevB.85.134111  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Pertsev, N. A.;Prokhorenko, S.;Dkhil, B.;
7:4:29:4     Magnetoelectric effects on ferromagnetic and ferroelectric phase transitions in multiferroic materials
DOI:10.1016/j.actamat.2014.05.038  JN:ACTA MATERIALIA  PY:2014
  TC:8  AU: Zhou, Jian-Ping;Zhang, Yu-Xiang;Liu, Qian;Liu, Peng;
7:4:29:5     External stress enhanced magnetoelectric coupling in multiferroic heterostructures
DOI:10.1063/1.4769432  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Bai, G.;Gong, X.;Liu, Z. G.;Xia, Y. D.;Yin, J.;
7:4:29:6     Effect of out-of-plane misfit strain on phase diagrams and ferroelectric properties of ferroelectric films in vertical nanocomposite structures
DOI:10.1007/s00339-012-7503-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:3  AU: Wu, Huaping;Chai, Guozhong;Xu, Bin;Li, Jiquan;Zhang, Zheng;
7:4:29:7     Enhancement of Ferroelectric Curie Temperature in BaTiO3 Films via Strain-Induced Defect Dipole Alignment
DOI:10.1002/adma.201400254  JN:ADVANCED MATERIALS  PY:2014
  TC:4  AU: Damodaran, Anoop R.;Breckenfeld, Eric;Chen, Zuhuang;Lee, Sungki;Martin, Lane W.;
7:4:29:8     Ferroelectric-ferromagnetic multilayers: A magnetoelectric heterostructure with high output charge signal
DOI:10.1063/1.4896189  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Prokhorenko, S.;Kohlstedt, H.;Pertsev, N. A.;
7:4:29:9     Strain-mediated magnetoelectric coupling in magnetostrictive/piezoelectric heterostructures and resulting high-frequency effects
DOI:10.1103/PhysRevB.83.224420  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Livesey, K. L.;
7:4:29:10     Giant direct magnetoelectric effect in strained multiferroic heterostructures
DOI:10.1103/PhysRevB.85.140401  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Janolin, Pierre-Eymeric;Pertsev, Nikolay A.;Sichuga, David;Bellaiche, L.;
7:4:29:11     Free-standing ferroelectric multilayers: Crossover from thin-film to bulk behavior
DOI:10.1063/1.3647585  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Prokhorenko, S.;Pertsev, N. A.;
7:4:29:12     Effect of interfacial Cr on magnetoelectricity of Fe-2/CrO2/BaTiO3(001)
DOI:10.1103/PhysRevB.81.214428  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Hoelzer, M.;Fechner, M.;Ostanin, S.;Mertig, I.;
7:4:29:13     Tuned dielectric, pyroelectric and piezoelectric properties of ferroelectric P(VDF-TrFE) thin films by using mechanical loads
DOI:10.1063/1.3685750  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Bai, G.;Li, R.;Liu, Z. G.;Xia, Y. D.;Yin, J.;
7:4:30:1     The influence of low-level pre-stressing on resonant magnetoelectric coupling in Terfenol-D/PZT/Terfenol-D laminated composite structure
DOI:10.1063/1.4876721  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Chen, Zhengxin;Su, Yu;
7:4:30:2     Modeling of magnetoelectric effects in flexural nanobilayers: The effects of surface stress
DOI:10.1063/1.4795167  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Hao, Feng;Fang, Daining;
7:4:30:3     The effects of interface misfit strain and surface tension on magnetoelectric effects in layered magnetostrictive-piezoelectric composites
DOI:10.1063/1.4816693  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Hao, Feng;Pei, Yongmao;Fang, Daining;
7:4:30:4     Static magnetoelectric coupling of magnetoelectric laminated composites under combined temperature and stress loadings
DOI:10.1063/1.4866688  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Zhou, Hao-Miao;Cui, Xiao-Le;
7:4:30:5     Nonlinear magnetoelectric effect in PZT/Terfenol-D nanobilayer on a substrate with surface stress
DOI:10.1063/1.4887435  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Shi, Yang;Niu, Longfei;Gao, Yuanwen;
7:4:30:6     Numerical simulation of nonlinear magnetic-mechanical-electric coupling effect in laminated magnetoelectric composites
DOI:10.1016/j.jmmm.2011.06.018  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:12  AU: Zhou, Hao-Miao;Xuan, Li-Ming;Li, Chao;Wei, Jing;
7:4:30:7     A four-state magnetoelectric coupling for embedded piezoelectric/magnetic composites
DOI:10.1063/1.3653293  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Fang, F.;Xu, Y. T.;Zhu, W. P.;Yang, W.;
7:4:30:8     Magnetoelectric coupling of laminated composites under combined thermal and magnetic loadings
DOI:10.1063/1.3677945  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:12  AU: Fang, F.;Xu, Y. T.;Yang, W.;
7:4:30:9     A nonlinear magnetoelectric model for magnetoelectric layered composite with coupling stress
DOI:10.1016/j.jmmm.2014.02.028  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:3  AU: Shi, Yang;Gao, Yuanwen;
7:4:30:10     A dual-peak phenomenon of magnetoelectric coupling in laminated Terfenol-D/PZT/Terfenol-D composites
DOI:10.1088/0964-1726/19/12/125004  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:12  AU: Zhao, C. P.;Fang, F.;Yang, W.;
7:4:30:11     Equivalent circuit method research of resonant magnetoelectric characteristic in magnetoelectric laminate composites using nonlinear magnetostrictive constitutive model
DOI:10.1088/0964-1726/20/3/035001  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:18  AU: Zhou, Hao-Miao;Li, Chao;Xuan, Li-Ming;Wei, Jing;Zhao, Ji-Xiang;
7:4:30:12     A multipeak phenomenon of magnetoelectric coupling in Terfenol-D/P(VDF-TrFE)/Terfenol-D laminates
DOI:10.1063/1.3511747  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Fang, F.;Shan, S. C.;Yang, W.;
7:4:30:13     Influence of mechanical load bias on converse magnetoelectric laminate composites
DOI:10.1063/1.3362919  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Wu, Tao;Emmons, Michael;Chung, Tien-Kan;Sorge, Jian;Carman, Gregory P.;
7:4:30:14     Enhanced magnetoelectric effect for flexible current sensor applications
DOI:10.1063/1.4876910  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Le, Minh-Quyen;Belhora, Fouad;Cornogolub, Alexandru;Cottinet, Pierre-Jean;Lebrun, Laurent;Hajjaji, Abdelouahed;
7:4:30:15     Direct and inverse magnetoelectric effect in layered composites in electromechanical resonance range: A review
DOI:10.1016/j.jmmm.2012.02.086  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:12  AU: Bichurin, M. I.;Petrov, V. M.;Petrov, R. V.;
7:4:31:1     Interfacial magnetoelectric coupling in tricomponent superlattices
DOI:10.1103/PhysRevB.81.144425  JN:PHYSICAL REVIEW B  PY:2010
  TC:28  AU: Lee, Jaekwang;Sai, Na;Cai, Tianyi;Niu, Qian;Demkov, Alexander A.;
7:4:31:2     Prediction of giant magnetoelectric effect in LaMnO3/BaTiO3/SrMnO3 superlattice: The role of n-type SrMnO3/LaMnO3 interface
DOI:10.1063/1.4893370  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chen, L. Y.;Chen, C. L.;Jin, K. X.;Wu, T.;
7:4:31:3     Magnetoelectric coupling in a ferroelectric/ferromagnetic chain revealed by ferromagnetic resonance
DOI:10.1063/1.4772746  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Sukhov, A.;Horley, P. P.;Jia, C. -L.;Berakdar, J.;
7:4:31:4     Enhancement of magnetoelectric effect by combining different interfacial coupling mechanisms
DOI:10.1063/1.4719972  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Dai, Jian-Qing;Song, Yu-Min;Zhang, Hu;
7:4:31:5     Favorable magnetoelectric phenomenon in Co2MnSi/PbTiO3 (001) ultrathin bilayer: A density functional theory study
DOI:10.1063/1.4824369  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Chen, L. Y.;Chen, C. L.;Jin, K. X.;Du, X. J.;Ali, A.;
7:4:31:6     Influence of magnetoelectric coupling on electric field induced magnetization reversal in a composite unstrained multiferroic chain
DOI:10.1103/PhysRevB.85.054401  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Horley, Paul P.;Sukhov, Alexander;Jia, Chenglong;Martinez, Eduardo;Berakdar, Jamal;
7:4:31:7     Large positive spin polarization and giant inverse tunneling magnetoresistance in Fe/PbTiO3/Fe multiferroic tunnel junction
DOI:10.1016/j.jmmm.2013.09.048  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Dai, Jian-Qing;Zhang, Hu;Song, Min;
7:4:31:8     Ferromagnetic resonance shifts from electric fields: Field-enhanced screening charge in ferromagnet/ferroelectric multilayers
DOI:10.1103/PhysRevB.85.104411  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Gunawan, V.;Stamps, R. L.;
7:4:31:9     Large magnetoelectric coupling in ferromagnetic/ferroelectric superlattices with asymetric interfaces
DOI:10.1016/j.jmmm.2013.11.029  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Dai, Jian-Qing;Song, Yu-Min;Zhang, Hu;
7:4:31:10     Interfacial electronic structure and magnetoelectric effect in M/BaTiO3 (M=Ni, Fe) superlattices
DOI:10.1016/j.jmmm.2012.06.046  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:7  AU: Dai, Jian-Qing;Zhang, Hu;Song, Yu-Min;
7:4:31:11     Uniaxial strain-modulated conductivity in manganite superlattice (LaMnO3/SrMnO3)
DOI:10.1063/1.3548675  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Cao, Dan;Cai, Meng-Qiu;Hu, Wang-Yu;Peng, Jun;Zheng, Yue;Huang, Hai-Tao;
7:4:31:12     Complex domain structure in relaxed PbTiO3 thick films grown on (100)(c)SrRuO3//(100)SrTiO3 substrates
DOI:10.1063/1.4746078  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Yasui, Shintaro;Ehara, Yoshitaka;Utsugi, Satoru;Nakajima, Mitsumasa;Funakubo, Hiroshi;Gruverman, Alexei;
7:4:31:13     Room-temperature magnetoelectric properties of Fe doped BaZr0.05Ti0.95O3
DOI:10.1063/1.4795425  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Kumari, Mukesh;Prakash, Chandra;Chatterjee, Ratnamala;
7:4:31:14     Strong coupling of Jahn-Teller distortion to oxygen-octahedron rotation and functional properties in epitaxially strained orthorhombic LaMnO3
DOI:10.1103/PhysRevB.88.174426  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:4:32:1     Effect of rare earth substitution on properties of barium strontium titanate ceramic and its multiferroic composite with nickel cobalt ferrite
DOI:10.1016/j.jallcom.2014.07.204  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Pahuja, Poonam;Kotnala, R. K.;Tandon, R. P.;
7:4:32:2     Synthesis and characterization of Ni0.8Co0.2Fe2O4-Ba0.95ST0.05TiO3 multiferroic composites
DOI:10.1016/j.ceramint.2013.05.061  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Pahuja, Poonam;Sharma, Richa;Prakash, Chandra;Tandon, R. P.;
7:4:32:3     Comparative study of magnetoelectric composite system Ba0.95Sr0.05TiO3-Ni0.8Co0.2Fe2O4 with ferrite prepared by different methods
DOI:10.1016/j.ceramint.2013.11.012  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Pahuja, Poonam;Prakash, Chandra;Tandon, R. P.;
7:4:32:4     Large remanent polarization in multiferroic NdFeO3-PbTiO3 thin film
DOI:10.1063/1.4819386  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Zhao, Hanqing;Peng, Xin;Zhang, Linxing;Chen, Jun;Yan, Wensheng;Xing, Xianran;
7:4:32:5     Magnetic and magnetoelectric properties of nickel ferrite lead iron niobate relaxor composites
DOI:10.1016/j.jeurceramsoc.2011.10.035  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:15  AU: Guzdek, P.;Sikora, M.;Gora, L.;Kapusta, Cz.;
7:4:32:6     Magnetic field induced polarization and magnetoelectric effect of Ba0.8Ca0.2TiO3-Ni0.2Cu0.3Zn0.5Fe2O4 nanomultiferroic
DOI:10.1063/1.4795820  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Sadhana, Katlakunta;Murthy, Sarabu Ramana;Jie, Shang;Xie, Yali;Liu, Yiwei;Zhan, Qingfeng;Li, Run-Wei;
7:4:32:7     Optimal multiferroic properties and enhanced magnetoelectric coupling in SmFeO3-PbTiO3 solid solutions
DOI:10.1063/1.3380596  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Singh, Anupinder;Choudhary, Ishan;Mehta, Sunita;Dahiya, Sajjan;Walia, Chitsimranjit Singh;Raina, K. K.;Chatterjee, Ratnamala;
7:4:32:8     Magnetoelectric effect in composite structures based on ferroelectric-ferromagnetic perovskites
DOI:10.1016/j.jeurceramsoc.2009.05.043  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Solopan, S. A.;V'yunov, O. I.;Belous, A. G.;Tovstolytkin, A. I.;Kovalenko, L. L.;
7:4:32:9     The magnetostrictive and magnetoelectric characterization of Ni0.3Zn0.62Cu0.08Fe2O4-Pb(FeNb)(0.5)O-3 laminated composite
DOI:10.1016/j.jmmm.2013.08.064  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:8  AU: Guzdek, P.;
7:4:32:10     Studies of dielectric properties of rare earth (Dy, Tb, Eu) doped barium titanate sintered in pure nitrogen
DOI:10.1016/j.ceramint.2011.04.042  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Li, Yan-Xia;Yao, Xi;Wang, Xu-Sheng;Hao, Ying-Bin;
7:4:32:11     Ac electrical conductivity and magnetic properties of BiFeO3-CoFe2O4 nanocomposites
DOI:10.1016/j.jallcom.2014.02.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Sharma, H. B.;Devi, K. Nomita;Gupta, V.;Lee, J. H.;Singh, S. Bobby;
7:4:32:12     Absence of morphotropic phase boundary effects in BiFeO3-PbTiO3 thin films grown via a chemical multilayer deposition method
DOI:10.1007/s00339-010-6163-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:6  AU: Gupta, Shashaank;Bhattacharjee, Shuvrajyoti;Pandey, Dhananjai;Bansal, Vipul;Bhargava, Suresh K.;Peng, Ju Lin;Garg, Ashish;
7:4:32:13     Effect of CoFe2O4 mole percentage on multiferroic and magnetoelectric properties of Na0.5Bi0.5TiO3/CoFe2O4 particulate composites
DOI:10.1016/j.ceramint.2013.12.123  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Krishnaiah, R. V.;Srinivas, A.;Kamat, S. V.;Karthik, T.;Asthana, Saket;
7:4:32:14     NiZnCu ferrite applied for LTCC microinductor
DOI:10.1016/j.jmmm.2010.05.001  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:7  AU: Guzdek, P.;Kulawik, J.;Zaraska, K.;Bienkowski, A.;
7:4:32:15     Structural, electrical, magnetic and dielectric properties of rare-earth substituted cobalt ferrites nanoparticles synthesized by the co-precipitation method
DOI:10.1016/j.jmmm.2013.11.052  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:20  AU: Nikumbh, A. K.;Pawar, R. A.;Nighot, D. V.;Gugale, G. S.;Sangale, M. D.;Khanvilkar, M. B.;Nagawade, A. V.;
7:4:32:16     Anomalous electrical transport properties of nonstoichiometric nickel ferrite below room temperature
DOI:10.1016/j.materresbull.2011.03.007  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:4  AU: Ghatak, S.;Sinha, M.;Meikap, A. K.;Pradhan, S. K.;
7:4:33:1     Imaging and Control of Surface Magnetization Domains in a Magnetoelectric Antiferromagnet
DOI:10.1103/PhysRevLett.106.087202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:18  AU: Wu, Ning;He, Xi;Wysocki, Aleksander L.;Lanke, Uday;Komesu, Takashi;Belashchenko, Kirill D.;Binek, Christian;Dowben, Peter A.;
7:4:33:2     Equilibrium Magnetization at the Boundary of a Magnetoelectric Antiferromagnet
DOI:10.1103/PhysRevLett.105.147204  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:18  AU: Belashchenko, K. D.;
7:4:33:3     Electric Control of Exchange Bias Training
DOI:10.1103/PhysRevLett.111.187204  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Echtenkamp, W.;Binek, Ch.;
7:4:33:4     Scaling of the Magnetoelectric Effect in Chromia Thin Films
DOI:10.1080/00150193.2012.671113  JN:FERROELECTRICS  PY:2012
  TC:7  AU: He, X.;Echtenkamp, W.;Binek, Ch.;
7:4:33:5     Increasing the Neel temperature of magnetoelectric chromia for voltage-controlled spintronics
DOI:10.1063/1.4880938  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Street, M.;Echtenkamp, W.;Komesu, Takashi;Cao, Shi;Dowben, P. A.;Binek, Ch.;
7:4:33:6     Positive exchange bias observed in Pt-inserted Cr2O3/Co exchange coupled bilayers
DOI:10.1063/1.4902828  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Nozaki, T.;Oida, M.;Ashida, T.;Shimomura, N.;Shibata, T.;Sahashi, M.;
7:4:33:7     Giant temperature dependence of the spin reversal field in magnetoelectric chromia
DOI:10.1063/1.4861780  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Fallarino, Lorenzo;Berger, Andreas;Binek, Christian;
7:4:33:8     Effect of substitutional doping on the Neel temperature of Cr2O3
DOI:10.1103/PhysRevB.87.054435  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Mu, Sai;Wysocki, A. L.;Belashchenko, K. D.;
7:4:33:9     Observation of magnetoelectric effect in Cr2O3/Pt/Co thin film system
DOI:10.1063/1.4871515  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Ashida, T.;Oida, M.;Shimomura, N.;Nozaki, T.;Shibata, T.;Sahashi, M.;
7:4:33:10     Microscopic origin of the structural phase transitions at the Cr2O3 (0001) surface
DOI:10.1103/PhysRevB.86.165443  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Wysocki, A. L.;Shi, Siqi;Belashchenko, K. D.;
7:4:33:11     Isothermal switching of perpendicular exchange bias by pulsed high magnetic field
DOI:10.1063/1.4731643  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Shiratsuchi, Yu;Wakatsu, Kohei;Nakamura, Tetsuya;Oikawa, Hiroto;Maenou, Satoru;Narumi, Yasuo;Tazoe, Kou;Mitsumata, Chiharu;Kinoshita, Toyohiko;Nojiri, Hiroyuki;Nakatani, Ryoichi;
7:4:33:12     Exchange bias and ferromagnetic coercivity in heterostructures with antiferromagnetic Cr2O3
DOI:10.1063/1.3621460  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Borisov, P.;Kleemann, W.;
7:4:33:13     Anomalous temperature dependence of training effect in specular spin valve using ultrathin Cr2O3-nano-oxide layer with magnetoelectric effect
DOI:10.1063/1.3340512  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Sawada, Kazuya;Shimomura, Naoki;Doi, Masaaki;Sahashi, Masashi;
7:4:33:14     Effect of the Pt buffer layer on perpendicular exchange bias based on collinear/non-collinear coupling in a Cr2O3/Co3Pt interface
DOI:10.1063/1.4797472  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Ashida, T.;Sato, Y.;Nozaki, T.;Sahashi, M.;
7:4:33:15     Demonstration of magnetoelectric effect in ultrathin Cr2O3/Fe2O3 nano-oxide layer by training effect
DOI:10.1063/1.4731274  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Shimomura, Naoki;Sawada, Kazuya;Nozaki, Tomohiro;Doi, Masaaki;Sahashi, Masashi;
7:4:33:16     Equilibrium Magnetization at the Boundary of a Magnetoelectric Antiferromagnet (vol 105, 147204, 2010)
DOI:10.1103/PhysRevLett.105.249902  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:0  AU: Belashchenko, K. D.;
7:4:34:1     Magnetoelectric effect of (1-x) Ba0.5Sr0.5Zr0.5Ti0.5O3+(x) Ni0.12Mg0.18Cu0.2Zn0.5Fe2O4 composites
DOI:10.1016/j.jmmm.2014.07.025  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:4  AU: Rahaman, Md. D.;Saha, S. K.;Ahmed, T. N.;Saha, D. K.;Hossain, A. K. M. Akther;
7:4:34:2     Impedance spectroscopic characterization of fine-grained magnetoelectric Pb(Zr0.53Ti0.47)O-3-(Ni0.5Zn0.5)Fe2O4 ceramic composites
DOI:10.1016/j.jallcom.2011.10.013  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:13  AU: Zhang, Hongfang;Mak, Chee-Leung;
7:4:34:3     Composition dependent electrical, dielectric, magnetic and magnetoelectric properties of (x)Co0.5Zn0.5Fe2O4 + (1-x)PLZT composites
DOI:10.1016/j.jallcom.2009.12.164  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:19  AU: Fawzi, Abdul Samee;Sheikh, A. D.;Mathe, V. L.;
7:4:34:4     Microstructure and properties of sol-gel derived PbTiO3/NiFe2O4 multiferroic composite thin film with the two nano-crystalline phases dispersed homogeneously
DOI:10.1016/j.jallcom.2010.05.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Zhu, Lu;Dong, Yanling;Zhang, Xuhui;Yao, Yiying;Weng, Wenjian;Han, Gaorong;Ma, Ning;Du, Piyi;
7:4:34:5     Impedance spectroscopy and conductivity mechanism of CoFe2O4-Pb(Zr0.53Ti0.47)O-3 composite thick films
DOI:10.1016/j.jallcom.2010.08.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Chen, W.;Zhu, W.;Ke, C.;Yang, Z.;Wang, L.;Chen, X. F.;Tan, O. K.;
7:4:34:6     Structure and electrical properties of BiFeO3 thin films grown on LaNiO3 electrode by chemical solution deposition
DOI:10.1016/j.jallcom.2010.03.192  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Zhang, Hailei;Chen, Xinman;Wang, Tao;Wang, Feifei;Shi, Wangzhou;
7:4:34:7     Electrical and magnetic properties of low-temperature sintered xBa(0.6)Sr(0.4)TiO(3) + (1-x)Nia(0.2)Cu(0.2)Zn(0.62)O(Fe2O3)(0.98) composite ceramics
DOI:10.1016/j.jallcom.2010.01.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Su, Li-na;Liu, Peng;He, Ying;Zhou, Jian-ping;Cao, Lei;Liu, Cheng;Zhang, Huai-wu;
7:4:34:8     Structural, electrical, magnetic and magnetoelectric properties of composites
DOI:10.1016/j.jmmm.2013.06.001  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:3  AU: Rani, Renu;Juneja, J. K.;Singh, Sangeeta;Prakash, Chandra;Raina, K. K.;
7:4:34:9     Dielectric properties of Zr substituted BST ceramics
DOI:10.1016/j.ceramint.2011.03.080  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:7  AU: Rani, Renu;Singh, Sangeeta;Juneja, J. K.;Raina, K. K.;Prakash, Chandra;
7:4:34:10     Electrical and magnetic properties of NiCuZn-CaCu3Ti4O12 composites doped with Bi2O3
DOI:10.1016/j.jallcom.2010.06.001  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:3  AU: He, Ying;Zhang, Huaiwu;Wang, Yunyan;Ling, Weiwei;Mu, Chunhong;Bai, Feiming;Liu, Peng;
7:4:34:11     Preparation and characterization of BaTiO3+MgCuZnFe2O4 nanocomposites
DOI:10.1016/j.jmmm.2013.04.037  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Kanakadurga, M.;Raju, P.;Murthy, S. R.;
7:4:34:12     Magnetic properties of xNi(0.53)Cu(0.12)Zn(0.35)Fe(1.88)O(4)+(1-x)BaTiO3 nanocomposites
DOI:10.1016/j.jmmm.2010.06.007  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:3  AU: Sadhana, K.;Praveena, K.;Murthy, S. R.;
7:4:34:13     Dielectric and Ferroelectric Properties of BST and Ni-Zn Ferrite Composites
DOI:10.1080/10584587.2010.504398  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:3  AU: Rani, Renu;Kumar, Parveen;Singh, Sangeeta;Juneja, J. K.;Raina, K. K.;Kotnnala, R. K.;Prakash, Chandra;
7:4:34:14     Dielectric and magnetic properties of 0.4PZT+0.6NiCuZn-ferrite composites modified with P2O5-Co2O3
DOI:10.1063/1.3360197  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Jia, Lijun;Zhang, Huaiwu;Li, Tao;Liu, Yingli;Wen, Qiye;Shen, Jian;
7:4:34:15     Dielectric and magnetoelectric properties of Li0.5Ni0.75-x/2Znx/2Fe2O4 + Ba0.5Sr0.5TiO3 ME composites
DOI:10.1016/j.matchemphys.2011.08.069  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:4  AU: Durgadsimi, S. U.;Chougule, S. S.;Chougule, B. K.;Bhosale, C. H.;Bellad, S. S.;
7:4:35:1     Large converse magnetoelectric effect in Metglas FeCoBSi and 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) laminated composite
DOI:10.1063/1.3549871  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: Xuan, H. C.;Wang, L. Y.;Ma, S. C.;Zheng, Y. X.;Cao, Q. Q.;Wang, D. H.;Du, Y. W.;
7:4:35:2     Electric field control of magnetism without magnetic bias field in the Ni/Pb(Mg1/3Nb2/3)O-3-PbTiO3/Ni composite
DOI:10.1063/1.3616137  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Xuan, H. C.;Wang, L. Y.;Zheng, Y. X.;Li, Y. L.;Cao, Q. Q.;Chen, S. Y.;Wang, D. H.;Huang, Z. G.;Du, Y. W.;
7:4:35:3     Electric field control of magnetic properties in CoPt/Pb(Mg1/3Nb2/3)O-3-PbTiO3 heterostructure at room temperature
DOI:10.1063/1.4819459  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Yang, Y. T.;Zhang, Q. M.;Wang, D. H.;Song, Y. Q.;Wang, L. Y.;Lv, L. Y.;Cao, Q. Q.;Du, Y. W.;
7:4:35:4     Electric-field control of magnetic anisotropy in Fe81Ga19/BaTiO3 heterostructure films
DOI:10.1063/1.4901911  JN:AIP ADVANCES  PY:2014
  TC:2  AU: Xie, Yali;Zhan, Qingfeng;Liu, Yiwei;Dai, Guohong;Yang, Huali;Zuo, Zhenghu;Chen, Bin;Wang, Baomin;Zhang, Yao;Rong, Xin;Li, Run-Wei;
7:4:35:5     Electric-field-assisted magnetization switching in FePd/Pb(Mg1/3Nb2/3)O-3-PbTiO3 heterostructure at room temperature
DOI:10.1063/1.4824542  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Yang, Y. T.;Wang, D. H.;Song, Y. Q.;Gao, J. L.;Lv, L. Y.;Cao, Q. Q.;Du, Y. W.;
7:4:35:6     Electric field control of magnetism in FePd/PMN-PT heterostructure for magnetoelectric memory devices
DOI:10.1063/1.4861618  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Yang, Y. T.;Song, Y. Q.;Wang, D. H.;Gao, J. L.;Lv, L. Y.;Cao, Q. Q.;Du, Y. W.;
7:4:35:7     Effect of phase transformation on the converse magnetoelectric properties of a heterostructure of Ni49.2Mn29.6Ga21.2 and 0.7PbMg(1/3)Nb(2/3)O(3)-0.3PbTiO(3) crystals
DOI:10.1063/1.3427388  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Zeng, M.;Or, Siu Wing;Chan, Helen Lai Wa;
7:4:35:8     Large converse magnetoelectric coupling effect at room temperature in CoPd/PMN-PT (001) heterostructure
DOI:10.1063/1.3531648  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Kim, Ju-Hyun;Ryu, Kwang-Su;Jeong, Jae-Woo;Shin, Sung-Chul;
7:4:35:9     Electric-field-controlled magnetic responses in Metglas and lead zirconate titanate laminated composite
DOI:10.1016/j.jallcom.2012.10.139  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Xuan, H. C.;Wang, D. H.;Du, Y. W.;
7:4:35:10     Effect of electric field on magneto-transport properties in La-2/3(Ca0.6Ba0.4)(1/3)MnO3/Pb(Zr0.52Ti0.48)O-3 laminated composite
DOI:10.1063/1.3556710  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Chen, S. Y.;Ye, Q. Y.;Wang, D. H.;Li, S. D.;Huang, Z. G.;Du, Y. W.;
7:4:36:1     Reversible control of magnetic domains in a Tb0.3Dy0.7Fe2/Pt/PbZr0.56Ti0.44O3 thin film heterostructure deposited on Pt/TiO2/SiO2/Si substrate
DOI:10.1063/1.4880736  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: More-Chevalier, J.;Ferri, A.;Cibert, C.;Poullain, G.;Desfeux, R.;Bouregba, R.;
7:4:36:2     Influence of Stress and Orientation on Magnetoelectric Coupling of Pb(Zr,Ti)O-3-CoFe2O4 Bilayer Films
DOI:10.1111/j.1551-2916.2010.04195.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:20  AU: Li, Zheng;Gao, Ya;Yang, Bin;Lin, Yuanhua;Yu, Rong;Nan, Ce-Wan;
7:4:36:3     Room temperature magnetoelectric coupling in Zn1-xCoxO/BaTiO3 bilayer system
DOI:10.1063/1.4896771  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Sundararaj, Anuraj;Therese, Helen Annal;Ramaswamy, Shivaraman;Chandrasekaran, Gopalakrishnan;Annamalai, Karthigeyan;
7:4:36:4     Preparation and characterization of AlN/FeCoSiB magnetoelectric thin film composites
DOI:10.1016/j.ceramint.2013.02.019  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Tong, Bei;Yang, Xiaofei;Guo, Zhe;Li, Kun;Ouyang, Jun;Lin, Gengqi;Chen, Shi;
7:4:36:5     Ultra-sensitive magnetoelectric microcantilever at a low frequency
DOI:10.1063/1.4764944  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Lee, Dong Gun;Kim, Sung Man;Yoo, Yong Kyung;Han, Jun Hyun;Chun, Dong Won;Kim, Yu-Chan;Kim, Jinseok;Hwang, Kyo Seon;Kim, Tae Song;Jo, Won Woo;Kim, Hyungsuk;Song, Seung-Ho;Lee, Jeong Hoon;
7:4:36:6     Local two-way magnetoelectric couplings in multiferroic composites via scanning probe microscopy
DOI:10.1063/1.3481459  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Xie, S. H.;Liu, Y. M.;Liu, X. Y.;Zhou, Q. F.;Shung, K. K.;Zhou, Y. C.;Li, J. Y.;
7:4:36:7     Design of magnetoelectric coupling in a self-assembled epitaxial nanocomposite via chemical interaction
DOI:10.1039/c3tc31987c  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:4  AU: Liang, Wen I.;Liu, Yuangming;Liao, Sheng Chieh;Wang, Wei Cheng;Liu, Heng Jui;Lin, Hong Ji;Chen, Chien Te;Lai, Chih Huang;Borisevich, Albina;Arenholz, Elke;Li, Jiangyu;Chu, Ying Hao;
7:4:36:8     Fabrication and characterization of shape anisotropy AlN/FeCoSiB magnetoelectric composite films
DOI:10.1016/j.ceramint.2013.09.090  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Chen, Shi;Yang, Xiaofei;Ouyang, Jun;Lin, Gengqi;Jin, Fang;Tong, Bei;
7:4:36:9     Magnetoelectric coupling of multilayered Pb(Zr0.52Ti0.48)O-3-CoFe2O4 film by piezoresponse force microscopy under magnetic field
DOI:10.1063/1.4757621  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Xie, S. H.;Liu, Y. M.;Ou, Y.;Chen, Q. N.;Tan, X. L.;Li, J. Y.;
7:4:36:10     Magnetoelectric coupling in Tb0.3Dy0.7Fe2/Pt/PbZr0.56Ti0.44O3 thin films deposited on Pt/TiO2/SiO2/Si substrate
DOI:10.1063/1.4775764  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Cibert, C.;Zhu, J.;Poullain, G.;Bouregba, R.;More-Chevalier, J.;Pautrat, A.;
7:4:36:11     Piezoelectric and piezomagnetic force microscopies of multiferroic BiFeO3-LiMn2O4 heterostructures
DOI:10.1063/1.4891344  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Eshghinejad, Ahmad;Liang, Wen-I.;Chen, Qian Nataly;Ma, Feiyue;Liu, Yuanming;Xie, Shuhong;Chu, Ying-Hao;Li, Jiangyu;
7:4:36:12     Inverse effect of magnetostriction in magnetoelectric laminates
DOI:10.1063/1.4812483  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Auslender, M.;Liverts, E.;Zadov, B.;Elmalem, A.;Zhdanov, A.;Grosz, A.;Paperno, E.;
7:4:36:13     Magnetic properties of Terfenol-D film on a compliant substrate
DOI:10.1016/j.jmmm.2010.01.043  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:2  AU: Lu, XiaoYan;Li, Hui;
7:4:36:14     Atomic force microscopy-coupled microcoils for cellular-scale nuclear magnetic resonance spectroscopy
DOI:10.1063/1.4801318  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Mousoulis, Charilaos;Maleki, Teimour;Ziaie, Babak;Neu, Corey P.;
7:4:37:1     Temperature dependence of magnetoelectric effect in Bi3.15Nd0.85Ti3O12-La0.7Ca0.3MnO3 multiferroic composite films buffered by a LaNiO3 layer
DOI:10.1039/c3tc32105c  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:4  AU: Tang, Zhenhua;Xiong, Ying;Tang, Minghua;Xiao, Yongguang;Zhang, Wei;Yuan, Meiling;Ouyang, Jun;Zhoua, Yichun;
7:4:37:2     Enhanced magnetoelectric effect in La0.67Sr0.33MnO3/PbZr0.52Ti0.48O3 multiferroic nanocomposite films with a SrRuO3 buffer layer
DOI:10.1063/1.4803057  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Tang, Z. H.;Tang, M. H.;Lv, X. S.;Cai, H. Q.;Xiao, Y. G.;Cheng, C. P.;Zhou, Y. C.;He, J.;
7:4:37:3     Room temperature multiferroic effects in superlattice nanocapacitors
DOI:10.1063/1.3528210  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Dussan, S.;Kumar, A.;Scott, J. F.;Priya, S.;Katiyar, R. S.;
7:4:37:4     Resonance Magnetoelectric Effect in NaNbO3-NiFe2O4 Composite
DOI:10.1111/jace.12142  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Han, Yemei;Li, Lingxia;Wang, Zhi;Guo, Dong;Zhang, Mingming;
7:4:37:5     Effect of electrode resistance on dielectric and transport properties of multiferroic superlattice: A Impedance spectroscopy study
DOI:10.1063/1.4746026  JN:AIP ADVANCES  PY:2012
  TC:6  AU: Dussan, Sandra;Kumar, Ashok;Scott, J. F.;Katiyar, Ram S.;
7:4:37:6     Magneto-Electric Properties of Multiferroic Pb(Zr0.52Ti0.48)O-3-NiFe2O4 Nanoceramic Composites
DOI:10.1111/j.1551-2916.2011.04665.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Jiang, Qinghui;Liu, Futian;Yan, Haixue;Ning, Huanpo;Libor, Zsuzsanna;Zhang, Qi;Cain, Markys;Reece, Michael J.;
7:4:37:7     Photoconductivity in BiFeO3/La0.7Sr0.3MnO3 heterostructure
DOI:10.1016/j.matlet.2010.04.059  JN:MATERIALS LETTERS  PY:2010
  TC:11  AU: Zhou, Chao-Chao;Jin, Ke-xin;Luo, Bing-Cheng;Cao, Xian-sheng;Chen, Chang-Le;
7:4:37:8     Dielectric and electrical conductivity studies of bulk lead (II) oxide (PbO)
DOI:10.1016/j.jallcom.2013.11.218  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Darwish, A. A. A.;El-Zaidia, E. F. M.;El-Nahass, M. M.;Hanafy, T. A.;Al-Zubaidi, A. A.;
7:4:37:9     Effect of PbZr0.52Ti0.48O3 thin layer on structure, electronic and magnetic properties of La0.65Sr0.35MnO3 and La0.65Ca0.30MnO3 thin-films
DOI:10.1063/1.3592660  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Hezareh, T.;Razavi, F. S.;Kremer, R. K.;Habermeier, H. -U.;Lebedev, O. I.;Kirilenko, D.;Van Tendeloo, G.;
7:4:37:10     Effect of packing fraction on ferromagnetic resonance in NiFe2O4 nanocomposites
DOI:10.1063/1.3679635  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Song, Han;Mulley, Sam;Coussens, Nathan;Dhagat, Pallavi;Jander, Albrecht;Yokochi, Alexandre;
7:4:38:1     Electrophoretic deposition of multiferroic BaTiO3/CoFe2O4 bilayer films
DOI:10.1016/j.matchemphys.2011.02.004  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:20  AU: Zhou, Dongxiang;Jian, Gang;Hu, Yunxiang;Zheng, Yanan;Gong, Shuping;Liu, Huan;
7:4:38:2     Electrophoretic deposition of multiferroic BiFeO3 sub-micrometric particles from stabilized suspensions
DOI:10.1016/j.jeurceramsoc.2012.12.007  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:9  AU: Ponzoni, Chiara;Rosa, Roberto;Cannio, Maria;Buscaglia, Vincenzo;Finocchio, Elisabetta;Nanni, Paolo;Leonelli, Cristina;
7:4:38:3     Large magneto-electric effects in hexagonal La0.7Ba0.3MnO3-BaTiO3 solid solutions and magneto-electric coupling mechanism discussion
DOI:10.1063/1.4897200  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Fu, Qiuyun;Zhou, Ling;Zhou, Dongxiang;Miao, Ling;Chen, Chi;Xue, Fei;
7:4:38:4     Double Perovskite Sr2FeMoO6 Films Prepared by Electrophoretic Deposition
DOI:10.1021/am5052125  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:1  AU: Kovalev, Leonid V.;Yarmolich, Marta V.;Petrova, Manuela L.;Ustarroz, Jon;Terryn, Herman A.;Kalanda, Nikolai A.;Zheludkevich, Mikhail L.;
7:4:38:5     First-principles calculations of the structural and dynamical properties of ferroelectric YMnO3
DOI:10.1103/PhysRevB.84.214301  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Prikockyte, Alina;Bilc, Daniel;Hermet, Patrick;Dubourdieu, Catherine;Ghosez, Philippe;
7:4:38:6     Improper ferroelectricity and multiferroism in 2H-BaMnO3
DOI:10.1103/PhysRevB.87.140403  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Varignon, Julien;Ghosez, Philippe;
7:4:38:7     Electrophoretic deposition of BaTiO3/CoFe2O4 multiferroic composite films
DOI:10.1016/j.apsusc.2011.03.141  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:9  AU: Zhou, Dongxiang;Jian, Gang;Zheng, Yanan;Gong, Shuping;Shi, Fei;
7:4:38:8     Electrophoretic deposition of CoFe2O4 films from aqueous suspensions
DOI:10.1016/j.ceramint.2012.01.014  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Jian, Gang;Zhao, Jun;Zhou, Dongxiang;Fu, Qiuyun;
7:4:38:9     Enhancement of the magnetization in the Fe3O4/BiFeO3 epitaxial heterostructures fabricated by magnetron sputtering
DOI:10.1063/1.3659483  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Liu, X. F.;Li, P.;Jin, C.;Bai, H. L.;
7:4:38:10     Relaxor ferroelectric behavior of BaMnO3 (2H) at room temperature
DOI:10.1063/1.3679176  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Satapathy, S.;Singh, M. K.;Pandit, Pragya;Gupta, P. K.;
7:4:38:11     Microstructure and multiferroic properties of BaTiO3/CoFe2O4 films on Al2O3/Pt substrates fabricated by electrophoretic deposition
DOI:10.1016/j.jeurceramsoc.2012.11.012  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Jian, Gang;Zhou, Dongxiang;Yang, Junyou;Shao, Hui;Xue, Fei;Fu, Qiuyun;
7:4:38:12     Fabrication of cobalt oxide (Co3O4) coating by electrophoretic deposition
DOI:10.1016/j.matlet.2014.04.013  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Zhang, Daixiong;Li, Xueming;Guo, Xiaogang;Lai, Chuan;
7:4:38:13     Characterization of 0.7Bi(Fe0.9Cr0.1)O-3-0.2PbTiO(3)-0.1BaTiO(3) Multiferroic Ceramics Derived from Sol-Gel
DOI:10.1111/j.1551-2916.2009.03550.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Liu, Xiao-Hui;Xu, Zhuo;Wei, Xiao-Yong;Yao, Xi;
7:4:38:14     Electric and Magnetic Properties of CoFe2O4-PbZr0.5Ti0.5O3 Composite Thin Films
DOI:10.1080/00150193.2010.484711  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Mo, Weifeng;Zhai, Jiwei;Zhang, Ling;Yao, Xi;
7:4:39:1     Ferroelectric and dielectric properties of 0.62Pb(Mg1/3Nb2/3)O-3-0.38PbTiO(3) thin films on La0.6Sr0.4CoO3 buffered Si substrates
DOI:10.1016/j.jallcom.2012.03.068  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Tang, Yanxue;Zhou, Dan;Wang, Feifei;Sun, Dazhi;Shi, Wangzhou;Luo, Haosu;Hu, Gujin;
7:4:39:2     Influence of residual stress on magnetoelectric coupling of bilayered CoFe2O4/PMN-PT thin films
DOI:10.1039/c1jm11271f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:7  AU: Feng, Ming;Wang, Wen;Zhou, Yu;Li, Haibo;Jia, Dechang;
7:4:39:3     Microstructural, electrical and magnetic properties of multiferroic CoFe2O4/0.68Pb(Mg1/3Nb2/3)O-3-0.32PbTiO(3) nanocomposite thin films
DOI:10.1016/j.ceramint.2011.05.031  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:4  AU: Feng, M.;Wang, W.;Rao, J. C.;Zhou, Y.;Jia, D. C.;Li, H. B.;
7:4:39:4     Highly (111)-oriented and pyrochlore-free PMN-PT thin films derived from a modified sol-gel process
DOI:10.1016/j.jallcom.2010.01.109  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Feng, M.;Wang, W.;Ke, H.;Rao, J. C.;Zhou, Y.;
7:4:39:5     Epitaxial PMN-PT thin films grown on buffered Si substrates using ceramic and single-crystal targets
DOI:10.1016/j.jallcom.2011.04.002  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Jiang, Juan;Jung, Hyun-June;Yoon, Soon-Gil;
7:4:39:6     Effects of Mg doping on multiferroic properties of bilayered Co1-xMgxFe2O4/PMN-PT composite thin films
DOI:10.1016/j.ceramint.2013.07.101  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Li, J. M.;Li, G. Z.;Bai, Z. H.;Wang, L. L.;Feng, M.;Li, H. B.;
7:4:39:7     Electric field-modulated Hall resistivity and magnetization in magnetoelectric Ni-Mn-Co-Sn/PMN-PT laminate
DOI:10.1016/j.jallcom.2011.05.058  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Chen, S. Y.;Zheng, Y. X.;Ye, Q. Y.;Xuan, H. C.;Cao, Q. Q.;Deng, Y.;Wang, D. H.;Du, Y. W.;Huang, Z. G.;
7:4:39:8     Epitaxial 0.65PbMg(1/3)Nb(2/3)O(3)-0.35PbTiO(3) (PMN-PT) thin films grown on LaNiO3/CeO4/YSZ buffered Si substrates
DOI:10.1016/j.jallcom.2010.11.200  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Jiang, Juan;Yoon, Soon-Gil;
7:4:39:9     Electrically controlled magnetization switching in CoFe2O4/Pb(Mg1/3Nb2/3)O-3-PbTiO3 heterostructure
DOI:10.1016/j.matlet.2014.01.123  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Zhang, Qingmei;Yang, Yanting;Gao, Rongli;Zhou, Weiping;Li, Qian;Wang, Dunhui;Du, Youwei;
7:4:39:10     Multiferroic behavior of.BiFeO3-RTiO3 (Mg, Sr, Ca, Ba, and Pb) thin films
DOI:10.1063/1.3452324  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Wu, Jiagang;Wang, John;
7:4:39:11     Growth of Epitaxial (110) 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) Thin Films on r-Plane Sapphire Substrates by RF Magnetron Sputtering
DOI:10.1007/s11664-009-0945-6  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2010
  TC:3  AU: Krishna, Lakshmi;Sunder, Madhana;Moran, P. D.;
7:4:39:12     Smooth silk fibroin nanofilm deposited by 1064-nm pulsed laser beam from an opaque target
DOI:10.1016/j.tsf.2013.07.022  JN:THIN SOLID FILMS  PY:2013
  TC:0  AU: Nozaki, R.;Nakayama, S.;Senna, M.;
7:4:39:13     Improving the piezoelectric thermal stability by tailoring phase transition behavior in the new (1-x)[0.65PbMg(1/3)Nb(2/3)O(3)-0.35PbTiO(3)]-xBiZn(1/2)Ti(1/2)O(3) perovskite solid solutions
DOI:10.1016/j.jallcom.2011.06.009  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Cao, Zhenzhu;Li, Guorong;Zeng, Jiangtao;Or, Siu Wing;Zheng, Liaoying;Yin, Qingrui;Cheng, Lihong;
7:4:40:1     Microstructure and Properties of Well-Ordered Multiferroic Pb(Zr,Ti)O-3/CoFe2O4 Nanocomposites
DOI:10.1021/nn9012934  JN:ACS NANO  PY:2010
  TC:37  AU: Gao, Xingsen;Rodriguez, Brian J.;Liu, Lifeng;Birajdar, Balaji;Pantel, Daniel;Ziese, Michael;Alexe, Marin;Hesse, Dietrich;
7:4:40:2     Preparation and characterization of single-crystal multiferroic nanofiber composites
DOI:10.1016/j.jallcom.2012.11.087  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Ren, Zhaohui;Xiao, Zhen;Yin, Simin;Mai, Jiangquan;Liu, Zhenya;Xu, Gang;Li, Xiang;Shen, Ge;Han, Gaorong;
7:4:40:3     Influence of cycling electric polarization on multiferroic behaviors in heterostructural films composed of ferroelectric and ferromagnetic oxides
DOI:10.1007/s00339-013-7549-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:1  AU: Li, Zi-Wei;Zhou, Ming-Xiu;Chen, Bo;Wan, Jian-Guo;Liu, Jun-Ming;Wang, Guang-Hou;
7:4:40:4     Magnetoelectric CoFe2O4/Pb(Zr0.53Ti0.47)O-3 composite thin films of 2-2 type structure derived by a sol-gel process
DOI:10.1016/j.jallcom.2010.12.112  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Xu, Yu-Dong;Wu, Guang;Su, Hai-Lin;Shi, Min;Yu, Gui-Yang;Wang, Li;
7:4:40:5     Preparation and characterization of multiferroic CoFe2O4/Bi0.97Ce0.03FeO3 coaxial nanotubes
DOI:10.1007/s00339-012-6976-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Liu, X. L.;Li, M. Y.;Wang, J.;Hu, Z. Q.;Zhu, Y. D.;Zhao, X. Z.;
7:4:40:6     Long-ranged and high temperature ferromagnetism in (Mn,C)-codoped ZnO studied by first-principles calculations
DOI:10.1063/1.3289721  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Lin, Xue-ling;Yan, Shi-shen;Zhao, Ming-wen;Hu, Shu-jun;Yao, Xin-xin;Han, Chong;Chen, Yan-xue;Liu, Guo-lei;Dai, You-yong;Mei, Liang-mo;
7:4:40:7     Multiferroic PbZrxTi1-xO3/Fe3O4 epitaxial sub-micron sized structures
DOI:10.1063/1.3692583  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Vrejoiu, Ionela;Preziosi, Daniele;Morelli, Alessio;Pippel, Eckhard;
7:4:40:8     Multiferroic CoFe2O4-BiFeO3 core-shell nanofibers and their nanoscale magnetoelectric coupling
DOI:10.1557/jmr.2014.36  JN:JOURNAL OF MATERIALS RESEARCH  PY:2014
  TC:1  AU: Zhu, Qingfeng;Xie, Ying;Zhang, Jing;Liu, Yuanming;Zhan, Qingfeng;Miao, Hongchen;Xie, Shuhong;
7:4:40:9     Wrinkles of magnetoelectric composite thin films bonded on compliant buffer-layers
DOI:10.1063/1.4866575  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Ma, Jing;Pei, Yongmao;Sun, Youyi;Li, Faxin;Fang, Daining;
7:4:40:10     Electronic structure and magnetism of Fe-doped LiNbO3
DOI:10.1016/j.matchemphys.2012.07.058  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:3  AU: Zeng, F.;Sheng, P.;Tang, G. S.;Pan, F.;Yan, W. S.;Hu, F. C.;Zou, Y.;Huang, Y. Y.;Jiang, Z.;Guo, D.;
7:4:40:11     Strong d-d electron interaction inducing ferromagnetism in Mn-doped LiNbO3
DOI:10.1016/j.tsf.2011.01.230  JN:THIN SOLID FILMS  PY:2011
  TC:1  AU: Chen, C.;Zeng, F.;Li, J. H.;Sheng, P.;Luo, J. T.;Yang, Y. C.;Pan, F.;Zou, Y.;Huang, Y. Y.;Jiang, Z.;
7:4:41:1     Electrical resistance load effect on magnetoelectric coupling of magnetostrictive/piezoelectric laminated composite
DOI:10.1016/j.jallcom.2010.04.009  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:21  AU: Wang, Yaojin;Zhao, Xiangyong;Jiao, Jie;Liu, Linhua;Di, Wenning;Luo, Haosu;Or, Siu Wing;
7:4:41:2     Magnetoelectric properties of Fe-Ga/BaTiO3 laminate composites
DOI:10.1016/j.jallcom.2010.09.083  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Wang, Lei;Du, Zhaofu;Fan, Chongfei;Xu, Lihong;Zhang, Hongping;Zhao, Dongliang;
7:4:41:3     Lead-free magnetoelectric laminated composite of Mn-doped Na0.5Bi0.5TiO3-BaTiO3 single crystal and Tb0.3Dy0.7Fe1.92 alloy
DOI:10.1016/j.jallcom.2010.02.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Wang, Yaojin;Zhao, Xiangyong;Jiao, Jie;Zhang, Qinhui;Di, Wenning;Luo, Haosu;Leung, Chung Ming;Or, Siu Wing;
7:4:41:4     Large magnetoelectric effect from mechanically mediated magnetic field-induced strain effect in Ni-Mn-Ga single crystal and piezoelectric effect in PVDF polymer
DOI:10.1016/j.jallcom.2009.09.167  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Zeng, Min;Or, Siu Wing;Chan, Helen Lai Wa;
7:4:41:5     Effect of load resistance on magnetoelectric properties in FeGa/BaTiO3/FeGa laminate composites
DOI:10.1016/j.jallcom.2011.04.050  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:1  AU: Wang, Lei;Du, Zhaofu;Fan, Chongfei;Xu, Lihong;Zhang, Hongping;Zhao, Dongliang;
7:4:41:6     Processing and magneto-electric properties of sol-gel-derived Pb(Zr0.52Ti0.48)O-3-Ni0.8Zn0.2Fe2O4 2-2 type multilayered films
DOI:10.1007/s10853-011-5478-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:2  AU: Wang, Li;Zuo, Ruzhong;Su, Hailin;Shi, Min;Xu, Yudong;Wu, Guang;Yu, Guiyang;
7:4:41:7     Finite element modeling of magnetoelectric laminate composites in considering nonlinear and load effects for energy harvesting
DOI:10.1016/j.jallcom.2014.06.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Talleb, Hakeim;Ren, Zhuoxiang;
7:4:41:8     Finite element modeling of magnetic field sensors based on nonlinear magnetoelectric effect
DOI:10.1063/1.3553855  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Thu Trang Nguyen;Bouillault, Frederic;Daniel, Laurent;Mininger, Xavier;
7:4:41:9     Magnetoelectric sensor with miniature universal tunable bias magnetic circuit
DOI:10.1063/1.4815986  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Shi, Zhan;Tong, Yongshuai;Deng, Shuwen;Xue, Hao;Yang, Shuiyuan;Lu, Yong;Wang, Cuiping;Liu, Xingjun;
7:4:41:10     Research on a novel force sensor based on giant magnetostrictive material and its model
DOI:10.1016/j.jallcom.2010.10.035  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Jia, Zhen-Yuan;Liu, Hui-Fang;Wang, Fu-Ji;Ge, Chun-Ya;
7:4:41:11     Magnetic and transport properties of Ni2MnGa-BaTiO3 metal-insulator particulate composite with percolation threshold
DOI:10.1016/j.jallcom.2011.04.020  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Won, C. J.;Kambale, R. C.;Hur, N.;
7:4:42:1     Tunable dielectric behaviors of magnetic field of PZT5/NiFe2O4 ceramic particle magnetoelectric composites at room temperature
DOI:10.1016/j.jallcom.2014.03.032  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Cheng, Tao;Xu, Ling Fang;Qi, Peng Bo;Yang, Chang Ping;Wang, Rui Long;Xiao, Hai Bo;
7:4:42:2     Enhanced magnetodielectric effect and optical property of lead-free multiferroic (1-x)(Bi0.5Na0.5)TiO3/xCoFe(2)O(4) composites
DOI:10.1016/j.matchemphys.2014.07.002  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:2  AU: Rani, Jyoti;Yadav, K. L.;Prakash, Satya;
7:4:42:3     Magnetodielectric effect in BaTiO3/ZnFe2O4 core/shell nanoparticles
DOI:10.1016/j.jallcom.2013.10.136  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:7  AU: Singh, Sushant;Kumar, Naresh;Bhargava, Richa;Sahni, Mohit;Sung, Kil-dong;Jung, J. H.;
7:4:42:4     The Low-Temperature Cosintering of Cobalt Ferrite and Lead Zirconate Titanate Ceramic Composites
DOI:10.1111/jace.12600  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Jenus, Petra;Lisjak, Darja;Kuscer, Danjela;Makovec, Darko;Drofenik, Miha;
7:4:42:5     Synthesis and study of structural, dielectric, magnetic and magnetoelectric characterization of BiFeO3-NiFe2O4 nanocomposites prepared by chemical solution method
DOI:10.1016/j.jallcom.2013.09.201  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Singh, Hemant;Yadav, K. L.;
7:4:42:6     Studies on the piezoelectric and magnetostrictive phase distribution in lead zirconate titanate-cobalt iron oxide composites
DOI:10.1016/j.matchemphys.2011.11.071  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:5  AU: Basu, Sarmistha;Babu, K. Ramesh;Choudhary, R. N. P.;
7:4:42:7     Improved magnetoelectricity by uniaxial magnetic field pressed and sintered composites in BaTiO3 (x)-BaFe12O19 (1-x) system (x=0.8, 0.6)
DOI:10.1016/j.mseb.2010.05.033  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:5  AU: Srinivas, A.;Karthik, T.;Gopalan, R.;Chandrasekaran, V.;
7:4:42:8     Influence of in-situ magnetic field pressing on the structural and multiferroic behaviour of BiFeO3 ceramics
DOI:10.1016/j.ceramint.2011.08.036  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Karthik, T.;Srinivas, A.;Kamaraj, V.;Chandrasekeran, V.;
7:4:42:9     Enhancement of piezoelectric and ferroelectric properties of BaTiO3 ceramics by aluminum doping
DOI:10.1016/j.ceramint.2013.01.099  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Ali, Ahmed I.;Ahn, Chang Won;Kim, Yong Soo;
7:4:42:10     Synthesis and signature of M-E coupling in novel self-assembled CaCu3Ti4O12-NiFe2O4 nanocomposite structure
DOI:10.1063/1.3698499  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Ahlawat, Anju;Sathe, V. G.;Ganesan, V.;Phase, D. M.;Satapathy, S.;
7:4:43:1     Preparation and magnetoelectric properties of NiFe2O4-PZT composites obtained in-situ by gel-combustion method
DOI:10.1016/j.jeurceramsoc.2012.03.041  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:28  AU: Ciomaga, Cristina Elena;Airimioaei, Mirela;Nica, Valentin;Hrib, Luminita M.;Caltun, Ovidiu F.;Iordan, Alexandra R.;Galassi, Carmen;Mitoseriu, Liliana;Palamaru, Mircea N.;
7:4:43:2     Broadband dielectric spectroscopy of BaTiO3-Ni0.5Zn0.5Fe2O4 composite ceramics
DOI:10.1016/j.jallcom.2014.03.041  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Sakanas, A.;Grigalaitis, R.;Banys, J.;Mitoseriu, L.;Buscaglia, V.;Nanni, P.;
7:4:43:3     Ferroelectric and dielectric properties of ferrite-ferroelectric ceramic composites
DOI:10.1063/1.4792494  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Ciomaga, Cristina Elena;Neagu, Alexandra Maria;Pop, Mihai Valentin;Airimioaei, Mirela;Tascu, Sorin;Schileo, Giorgio;Galassi, Carmen;Mitoseriu, Liliana;
7:4:43:4     Studies on magnetic, dielectric and magnetoelectric behavior of (x) NiFe1.9Mn0.1O4 and (1-x) BaZr0.08Ti0.92O3 magnetoelectric composites
DOI:10.1016/j.jallcom.2009.09.080  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:14  AU: Kambale, R. C.;Shaikh, P. A.;Bhosale, C. H.;Rajpure, K. Y.;Kolekar, Y. D.;
7:4:43:5     Dielectric and magnetic properties of BaTiO3-NiFe2O4 multiferroic composites
DOI:10.1016/j.ceramint.2013.11.069  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Grigalaitis, R.;Petrovic, M. M. Vijatovic;Bobic, J. D.;Dzunuzovic, A.;Sobiestianskas, R.;Brilingas, A.;Stojanovic, B. D.;Banys, J.;
7:4:43:6     The generalized Jonscher's relationship for conductivity and its confirmation for porous structures
DOI:10.1016/j.jnoncrysol.2011.07.020  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2012
  TC:8  AU: Popov, I. I.;Nigmatullin, R. R.;Koroleva, E. Yu.;Nabereznov, A. A.;
7:4:43:7     Dielectric, electrical and magnetoelectric characterization of (x)Ni0.8Zn0.2Fe2O4 + (1-x)Pb0.93La0.07(Zr0.60Ti0.40)O-3 composites
DOI:10.1016/j.materresbull.2010.04.005  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:5  AU: Fawzi, Abdul Samee;Sheikh, A. D.;Mathe, V. L.;
7:4:43:8     Mossbauer Investigations of the 0.5BaTiO(3)-0.5(Ni,Zn)Fe2O4 Composites
DOI:10.1080/00150193.2012.675824  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Ramoska, T.;Banys, J.;Mitoseriu, L.;Buscaglia, V.;Mazeika, K.;Baltrunas, D.;
7:4:43:9     Microstructure and magnetic properties of BaTiO3-(Ni,Zn)Fe2O4 multiferroics
DOI:10.1016/j.tsf.2009.12.070  JN:THIN SOLID FILMS  PY:2010
  TC:4  AU: Koblischka, M. R.;Koblischka-Veneva, A.;Wick, M.;Mitoseriu, L.;Hartmann, U.;
7:4:43:10     Conductivity in disordered structures: Verification of the generalized Jonscher's law on experimental data
DOI:10.1063/1.4764343  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Popov, I. I.;Nigmatullin, R. R.;Khamzin, A. A.;Lounev, I. V.;
7:4:43:11     On the origin of slow processes of charge transport in porous media
DOI:10.1080/14786435.2012.715767  JN:PHILOSOPHICAL MAGAZINE  PY:2012
  TC:1  AU: Hunt, A.;Huisman, J. A.;Vereecken, H.;
7:4:44:1     Applications of magnetoelectrics
DOI:10.1039/c2jm16137k  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:77  AU: Scott, J. F.;
7:4:44:2     Coupled short-range ferroelectric and magnetic order in PbFe1/2Nb1/2O3
DOI:10.1103/PhysRevB.88.094105  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Stock, C.;Dunsiger, S. R.;Mole, R. A.;Li, X.;Luo, H.;
7:4:44:3     FERROELECTRICS A new spin on spintronics
DOI:10.1038/nmat2762  JN:NATURE MATERIALS  PY:2010
  TC:16  AU: Ramesh, R.;
7:4:44:4     Resonance magnetoelectric effects in a piezoelectric bimorph
DOI:10.1063/1.3633222  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Fetisov, Y. K.;Chashin, D. V.;Segalla, A. G.;Srinivasan, G.;
7:4:44:5     Coaxial Multiferroic Nanorod Arrays
DOI:10.1111/j.1551-2916.2009.03440.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Yang, Yaodong;Gao, Junqi;Li, Jie-Fang;Viehland, Dwight;
7:4:44:6     Demagnetizing factors for two parallel ferromagnetic plates and their applications to magnetoelectric laminated sensors
DOI:10.1063/1.3536518  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Liverts, E.;Grosz, A.;Zadov, B.;Bichurin, M. I.;Pukinskiy, Y. J.;Priya, S.;Viehland, D.;Paperno, E.;
7:4:44:7     Demagnetizing factors for disk samples of nonideal soft magnetic materials
DOI:10.1063/1.3347916  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Graham, C. D.;Lorenz, B. E.;
7:4:45:1     Strongly coupled phase transition in ferroelectric/correlated electron oxide heterostructures
DOI:10.1063/1.4738784  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Jiang, Lu;Choi, Woo Seok;Jeen, Hyoungjeen;Egami, Takeshi;Lee, Ho Nyung;
7:4:45:2     Ordered 180 degrees ferroelectric domains in epitaxial submicron structures
DOI:10.1063/1.3630232  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Vrejoiu, Ionela;Morelli, Alessio;Johann, Florian;Biggemann, Daniel;
7:4:45:3     Microstructures and electrical properties of Ba0.9Sr0.1Ti0.99Mn0.01O3 multilayers
DOI:10.1016/j.jallcom.2014.06.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Hong, Xuekun;Liu, Yushen;Zhang, Debao;Feng, Jinfu;Chu, Junhao;
7:4:45:4     Patterning of Epitaxial Perovskites from Micro and Nano Molded Stencil Masks
DOI:10.1002/adfm.201401170  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:1  AU: Nijland, Maarten;George, Antony;Thomas, Sean;Houwman, Evert P.;Xia, Jing;Blank, Dave H. A.;Rijnders, Guus;Koster, Gertjan;ten Elshof, Johan E.;
7:4:45:5     Engineering 180 degrees ferroelectric domains in epitaxial PbTiO3 thin films by varying the thickness of the underlying (La,Sr)MnO3 layer
DOI:10.1063/1.4897144  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Jin, L.;Jia, C. L.;Vrejoiu, I.;
7:4:45:6     Influence of the interfacing with an electrically inhomogeneous bottom electrode on the ferroelectric properties of epitaxial PbTiO3
DOI:10.1063/1.4828743  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Kim, Yunseok;Jesse, Stephen;Morelli, Alessio;Kalinin, Sergei V.;Vrejoiu, Ionela;
7:4:45:7     Structural, magnetic and electrical properties of ferromagnetic/ferroelectric multilayers
DOI:10.1063/1.3598134  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Sirena, M.;Kaul, E.;Pedreros, M. B.;Rodriguez, C. A.;Guimpel, J.;Steren, L. B.;
7:4:45:8     Nanoscale patterning of functional perovskite-type complex oxides by pulsed laser deposition through a nanostencil
DOI:10.1016/j.apsusc.2010.01.103  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:7  AU: Cojocaru, Cristian-Victor;Nechache, Riad;Harnagea, Catalin;Pignolet, Alain;Rosei, Federico;
7:4:45:9     Hybrid garnet crystal growth for thin-disc lasing applications by multi-beam pulsed laser deposition
DOI:10.1007/s00339-012-7155-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Sloyan, Katherine A.;May-Smith, Timothy C.;Eason, Robert W.;
7:4:46:1     Efficient magnetic hysteresis model for field and stress application in magnetostrictive Galfenol
DOI:10.1063/1.3318494  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:28  AU: Evans, P. G.;Dapino, M. J.;
7:4:46:2     Dependence of magnetic susceptibility on stress in textured polycrystalline Fe81.6Ga18.4 and Fe79.1Ga20.9 Galfenol alloys
DOI:10.1063/1.3280374  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Mahadevan, A.;Evans, P. G.;Dapino, M. J.;
7:4:46:3     Relationships between magnetization and dynamic stress for Galfenol rod alloy and its application in force sensor
DOI:10.1063/1.4795328  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Weng, Ling;Wang, Bowen;Dapino, M. J.;Sun, Ying;Wang, Li;Cui, Baozhi;
7:4:46:4     Major and minor stress-magnetization loops in textured polycrystalline Fe81.6Ga18.4 Galfenol
DOI:10.1063/1.4772722  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Weng, Ling;Walker, Travis;Deng, Zhangxian;Dapino, M. J.;Wang, Bowen;
7:4:46:5     Stress-dependent susceptibility of Galfenol and application to force sensing
DOI:10.1063/1.3486019  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Evans, P. G.;Dapino, M. J.;
7:4:46:6     Nonlinear finite element model for 3D Galfenol systems
DOI:10.1088/0964-1726/20/10/105034  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:13  AU: Chakrabarti, Suryarghya;Dapino, Marcelo J.;
7:4:46:7     A nonlinear transient constitutive model with eddy current effects for giant magnetostrictive materials
DOI:10.1063/1.3524479  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Wang, Tian-Zhong;Zhou, You-He;
7:4:46:8     Fully coupled discrete energy-averaged model for Terfenol-D
DOI:10.1063/1.3687372  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Chakrabarti, S.;Dapino, M. J.;
7:4:46:9     Stress and magnetic field-dependent Young's modulus in single crystal iron-gallium alloys
DOI:10.1016/j.jmmm.2010.01.046  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:13  AU: Datta, S.;Atulasimha, J.;Mudivarthi, C.;Flatau, A. B.;
7:4:46:10     Hysteresis, d(33)(star) and d(33) of Fe81.6Ga18.4 textured polycrystals
DOI:10.1063/1.3554252  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Restorff, J. B.;Wun-Fogle, M.;Summers, Eric;
7:4:46:11     A three dimensional rate equation model for the dynamical sensing effect of magnetostrictive Galfenol
DOI:10.1063/1.3549630  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Weetman, Philip;Akhras, George;
7:4:46:12     Vector magnetic hysteresis modeling of stress annealed galfenol
DOI:10.1063/1.4798307  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Adly, A. A.;Davino, D.;Giustiniani, A.;Visone, C.;
7:4:46:13     Modeling a Galfenol based stress sensor capable of sensing up to three axial stresses
DOI:10.1063/1.4831666  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Weetman, Philip;Akhras, George;
7:4:46:14     Fully coupled, dynamic model of a magnetostrictive amorphous ribbon and its validation
DOI:10.1063/1.4861735  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Bergmair, Bernhard;Huber, Thomas;Bruckner, Florian;Vogler, Christoph;Fuger, Markus;Suess, Dieter;
7:4:46:15     A dynamic model for a displacement amplified magnetostrictive driver for active mounts
DOI:10.1088/0964-1726/19/5/055009  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:10  AU: Chakrabarti, Suryarghya;Dapino, Marcelo J.;
7:4:46:16     Modeling magnetostrictive material for high-speed tracking
DOI:10.1063/1.3560044  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Bottauscio, Oriano;Roccato, Paolo E.;Zucca, Mauro;
7:4:46:17     Effects of hysteresis losses on dynamic behavior of magnetostrictive actuators
DOI:10.1063/1.3656981  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Jin, Ke;Kou, Yong;Liang, Yirui;Zheng, Xiaojing;
7:4:47:1     Magnetic nanoparticles: recent advances in synthesis, self-assembly and applications
DOI:10.1039/c1jm11845e  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:89  AU: Singamaneni, Srikanth;Bliznyuk, Valery N.;Binek, Christian;Tsymbal, Evgeny Y.;
7:4:47:2     Pattern transfer nanomanufacturing using magnetic recording for programmed nanoparticle assembly
DOI:10.1088/0957-4484/23/18/185304  JN:NANOTECHNOLOGY  PY:2012
  TC:12  AU: Henderson, J.;Shi, S.;Cakmaktepe, S.;Crawford, T. M.;
7:4:47:3     Assembly of magnetic nanoparticles into higher structures on patterned magnetic beads under the influence of magnetic field
DOI:10.1088/0957-4484/21/12/125603  JN:NANOTECHNOLOGY  PY:2010
  TC:13  AU: Ozdemir, Tugce;Sandal, Deniz;Culha, Mustafa;Sanyal, Amitav;Atay, Naz Zeynep;Bucak, Seyda;
7:4:47:4     Real time monitoring of superparamagnetic nanoparticle self-assembly on surfaces of magnetic recording media
DOI:10.1063/1.4864738  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Ye, L.;Qi, B.;Pearson, T.;Cordeau, Y.;Mefford, O. T.;Crawford, T. M.;
7:4:47:5     Cobalt nanoparticles doped emaraldine salt of polyaniline: A promising room temperature magnetic semiconductor
DOI:10.1016/j.jmmm.2010.08.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:5  AU: Hatamie, Shadie;Kulkarni, M. V.;Kulkarni, S. D.;Ningthoujam, R. S.;Vatsa, R. K.;Kale, S. N.;
7:4:47:6     Shape Induced Symmetry in Self-Assembled Mesocrystals of Iron Oxide Nanocubes (vol 11, pg 1651, 2011)
DOI:10.1021/nl201951d  JN:NANO LETTERS  PY:2011
  TC:1  AU: Disch, Sabrina;Wetterskog, Erik;Hermann, Raphael P.;Salazar-Alvarez, German;Busch, Peter;Brueckel, Thomas;Bergstroem, Lennart;Kamali, Saeed;
7:4:47:7     Repeatability of magnetic-field driven self-assembly of magnetic nanoparticles
DOI:10.1063/1.3556770  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Henderson, J. R.;Crawford, T. M.;
7:4:47:8     Imaging magnetic flux lines with iron oxide nanoparticles using a "fossilized liquid assembly"
DOI:10.1039/c1sm05057e  JN:SOFT MATTER  PY:2011
  TC:1  AU: Schmidt, Ryan;Benkoski, Jason;Cavicchi, Kevin;Karim, Alamgir;
7:4:48:1     Enhanced magnetoelectric properties in lead-free Ni0.83Co0.15Cu0.02Fe1.9O4-delta -Na0.5Bi0.5TiO3 composites by spark plasma sintering
DOI:10.1016/j.scriptamat.2014.03.004  JN:SCRIPTA MATERIALIA  PY:2014
  TC:5  AU: Mudinepalli, Venkata Ramana;Song, S. H.;Murty, B. S.;
7:4:48:2     Sol-gel derived nanocrystalline multiferroic BiFeO3 and R3+ (R=Er and Tm) doped therein: Magnetic phase transitions and enhancement of magnetic properties
DOI:10.1016/j.jmmm.2012.07.045  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:10  AU: Acharya, S.;Sutradhar, S.;Mandal, J.;Mukhopadhyay, K.;Deb, A. K.;Chakrabarti, P. K.;
7:4:48:3     Enhanced electric property and magneto-capacitance co-efficient co-related with modulated Raman spectroscopy of GaFeO3 in (GaFeO3)(0.50)(Ni0.40Zn0.40Cu0.20Fe2O4)(0.50)
DOI:10.1016/j.mseb.2014.07.010  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:0  AU: Mukhopadhyay, K.;Ghosh, M.;Mallick, P. K.;Chakrabarti, P. K.;
7:4:48:4     Enhanced magnetic behavior, exchange bias effect, and dielectric property of BiFeO3 incorporated in (BiFeO3)(0.50) (Co0.4Zn0.4Cu0.2 Fe2O4) (0.5) nanocomposite
DOI:10.1063/1.4869077  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Mukhopadhyay, K.;Mahapatra, A. S.;Sutradhar, S.;Chakrabarti, P. K.;
7:4:48:5     Dielectric, magnetic and magnetoelectric properties of multiferroic BiFe0.5Cr0.5O3-NiFe2O4 composites
DOI:10.1063/1.3360353  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Babu, S. Narendra;Hsu, Jen-Hwa;Chen, Y. S.;Lin, J. G.;
7:4:48:6     Effect of grain size on the electrical properties of high dense BPT nano crystalline ferro electric ceramics
DOI:10.1016/j.ceramint.2013.07.078  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Mudinepalli, Venkata Ramana;Song, Shenhua;Li, Junqin;Murty, B. S.;
7:4:48:7     Large converse magnetoelectric effect in Na0.5Bi0.5TiO3-CoFe2O4 lead-free multiferroic composites
DOI:10.1063/1.3679054  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Babu, S. Narendra;Malkinski, Leszek;
7:4:48:8     Characterization of submicrometer-sized NiZn ferrite prepared by spark plasma sintering
DOI:10.1016/j.ceramint.2013.11.099  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Song, Shenhua;Song, Qingguo;Li, Junqin;Mudinepalli, Venkata Ramana;Zhang, Zhongyi;
7:4:48:9     Electric field tunable magnetic properties of lead-free Na0.5Bi0.5TiO3/CoFe2O4 multiferroic composites
DOI:10.1063/1.3544500  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Babu, S. Narendra;Min, Seong Gi;Malkinski, Leszek;
7:4:48:10     Study of 0.9 BaTiO3-0.1 NixZn1-xFe2O4 magneto-electric composite ceramics
DOI:10.1063/1.4796145  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Upadhyay, Sanjay Kumar;Reddy, V. Raghavnedra;
7:4:48:11     Effect of CoFe2O4 Content on the Dielectric and Magnetoelectric Properties in CoFe2O4/Pb(Mg1/3Nb2/3)(0.35)Ti0.65O3 Composites
DOI:10.1080/00150193.2010.492726  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Pei, Ying;Li, Qishou;Shi, Wei;Zhang, Bin;Chen, Qiang;Yue, Xi;Xiao, Dingquan;Zhu, Jianguo;
7:4:48:12     Magnetoelectric response in lead-free multiferroic NiFe2O4-Na0.5Bi0.5TiO3 composites
DOI:10.1063/1.3540623  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Babu, S. Narendra;Hsu, Jen-Hwa;Chen, Y. S.;Lin, J. G.;
7:4:48:13     Static and dynamic magnetic behavior of nanocrystalline and nanocomposites of (Mn0.6Zn0.4Fe2O4)((1-z))(SiO2)(z) (z=0.0, 0.10, 0.15, 0.25)
DOI:10.1063/1.3499644  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Modak, S.;Karan, S.;Roy, S. K.;Chakrabarti, P. K.;
7:4:49:1     Growth of (111) oriented NiFe2O4 polycrystalline thin films on Pt(111) via sol-gel processing
DOI:10.1063/1.4752725  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Seifikar, Safoura;Tabei, Ali;Sachet, Edward;Rawdanowicz, Thomas;Bassiri-Gharb, Nazanin;Schwartz, Justin;
7:4:49:2     Structural and magnetic properties of biaxially textured NiFe2O4 thin films grown on c-plane sapphire
DOI:10.1063/1.4770366  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Seifikar, Safoura;Calandro, Bridget;Deeb, Elisabeth;Sachet, Edward;Yang, Jijin;Maria, Jon-Paul;Bassiri-Gharb, Nazanin;Schwartz, Justin;
7:4:49:3     Electric-field-control of magnetic remanence of NiFe2O4 thin film epitaxially grown on Pb(Mg1/3Nb2/3)O-3-PbTiO3
DOI:10.1063/1.3427311  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Park, Jung Hwan;Jeong, Young Kyu;Ryu, Sangwoo;Son, Jong Yeog;Jang, Hyun Myung;
7:4:49:4     Optimized Growth of Heteroepitaxial (111) NiFe2O4 Thin Films on (0001) Sapphire with Two In-Plane Variants via Chemical Solution Deposition
DOI:10.1111/jace.12520  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Seifikar, Safoura;Calandro, Bridget;Rasic, Goran;Deeb, Elisabeth;Yang, Jijin;Bassiri-Gharb, Nazanin;Schwartz, Justin;
7:4:49:5     Synthesis of the nanocrystalline CoFe2O4 ferrite thin films by a novel sol-gel method using glucose as an additional agent
DOI:10.1016/j.mseb.2011.12.017  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:14  AU: Sun, Jianrong;Wang, Zhiguang;Wang, Yuyu;Zhu, Yabin;Shen, Tielong;Pang, Lilong;Wei, Kongfang;Li, Fashen;
7:4:49:6     Piezoelectrically enhanced exchange bias in multiferroic heterostructures
DOI:10.1039/c4tc01337a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:0  AU: Kim, Tae Y.;Song, Seungwoo;Jang, Hyun M.;Peters, John A.;Jeong, Young K.;
7:4:49:7     Structural and magnetic properties of sol-gel derived NiFe2O4 thin films on silicon substrates
DOI:10.1016/j.jmmm.2014.03.004  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Seifikar, Safoura;Rawdanowicz, Thomas;Straka, Weston;Quintero, Christopher;Bassiri-Gharb, Nazanin;Schwartz, Justin;
7:4:50:1     Colossal electroresistance and colossal magnetoresistance in spinel multiferroic CdCr2S4
DOI:10.1063/1.3368123  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Sun, C. P.;Huang, C. L.;Lin, C. C.;Her, J. L.;Ho, C. J.;Lin, J. -Y.;Berger, H.;Yang, H. D.;
7:4:50:2     Disorder enhanced intrinsic electroresistance in Sm0.60Sr0.40Mn1-xFexO3
DOI:10.1063/1.4726265  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Mahmud, S. T.;Saber, M. M.;Alagoz, H. S.;Biggart, K.;Bouveyron, R.;Khan, Mahmud;Jung, J.;Chow, K. H.;
7:4:50:3     Intrinsic electroresistance of Sm0.60Sr0.40MnO3 and Sm0.55Sr0.45MnO3
DOI:10.1063/1.3687179  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Mahmud, S. T.;Saber, M. M.;Alagoz, H. S.;Bouveyron, R.;Jung, J.;Chow, K. H.;
7:4:50:4     Negative differential resistance in Gd0.5Sr0.5MnO3: A consequence of Joule heating
DOI:10.1063/1.3486221  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Wagh, Aditya A.;Kumar, P. S. Anil;Bhat, H. L.;Elizabeth, Suja;
7:4:50:5     Electroresistance, magnetocapacitance and magnetotransport properties of La0.55Ca0.45MnO3/BaTiO3 composite
DOI:10.1016/j.matchemphys.2012.08.009  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:3  AU: Deac, I. G.;Balasz, I.;
7:4:50:6     Current driven discontinuous insulator-metal transition and low-field colossal magnetoresistance in Sm0.6Sr0.4MnO3
DOI:10.1063/1.3386535  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Rebello, A.;Mahendiran, R.;
7:4:50:7     Electronic, structural and magnetic phase diagram of Sm1-xSrxMnO3 manganites
DOI:10.1016/j.jmmm.2009.11.034  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:10  AU: Kurbakov, A. I.;
7:4:50:8     Electro-thermal bistability in (La0.7Sr0.3) MnO3 suspended microbridges: Thermal characterization and transient analysis
DOI:10.1063/1.4864222  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Ceriale, Valentina;Pellegrino, Luca;Manca, Nicola;Marre, Daniele;
7:4:50:9     Electroresistance and Joule heating effects in manganite thin films
DOI:10.1063/1.4792222  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Balcells, Ll.;Pena, L.;Galceran, R.;Pomar, A.;Bozzo, B.;Konstantinovic, Z.;Sandiumenge, F.;Martinez, B.;
7:4:50:10     Annealing induced colossal magnetocapacitance and colossal magnetoresistance in In-doped CdCr2S4
DOI:10.1063/1.4770486  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Xie, Y. M.;Yang, Z. R.;Li, L.;Yin, L. H.;Hu, X. B.;Huang, Y. L.;Jian, H. B.;Song, W. H.;Sun, Y. P.;Zhou, S. Q.;Zhang, Y. H.;
7:4:51:1     Present status of theoretical modeling the magnetoelectric effect in magnetostrictive-piezoelectric nanostructures. Part I: Low frequency and electromechanical resonance ranges
DOI:10.1063/1.3313919  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:33  AU: Bichurin, M. I.;Petrov, V. M.;Averkin, S. V.;Liverts, E.;
7:4:51:2     Direct measurements of field-induced strain at magnetoelectric interfaces by grazing incidence x-ray diffraction
DOI:10.1063/1.4773358  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Abes, M.;Koops, C. T.;Hrkac, S. B.;Greve, H.;Quandt, E.;Collins, S. P.;Murphy, B. M.;Magnussen, O. M.;
7:4:51:3     Enhancing magnetoelectric effect via the curvature of composite cylinder
DOI:10.1063/1.3415528  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:22  AU: Wang, H. M.;Pan, E.;Chen, W. Q.;
7:4:51:4     Effective magnetoelectric effect in multicoated circular fibrous multiferroic composites
DOI:10.1063/1.3583580  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:16  AU: Kuo, Hsin-Yi;Pan, Ernian;
7:4:51:5     Preparation and properties of the CoFe2O4/Bi3.15Nd0.85Ti3O12 multiferroic composite coaxial nanotubes
DOI:10.1016/j.matlet.2012.05.058  JN:MATERIALS LETTERS  PY:2012
  TC:1  AU: Liu, Xiaolian;Li, Meiya;Hu, Zhongqiang;Zhu, Yongdan;Dong, Shuxiang;Zhao, Xingzhong;
7:4:51:6     Local magnetization and strain in single magnetoelectric microrod composites
DOI:10.1063/1.4821443  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Hrkac, S. B.;Abes, M.;Koops, C. T.;Krywka, C.;Mueller, M.;Kaps, S.;Adelung, R.;McCord, J.;Lage, E.;Quandt, E.;Magnussen, O. M.;Murphy, B. M.;
7:4:51:7     Magnetoelectric effect of three-phase core-shell-matrix particulate multiferroic composites
DOI:10.1063/1.3692385  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Kuo, Hsin-Yi;Wu, Tzu-Sheng;
7:4:51:8     Direct measurements of field-induced strain in magnetoelectric composites by X-ray diffraction studies of forbidden reflections
DOI:10.1063/1.4797490  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Abes, M.;Koops, C. T.;Hrkac, S. B.;Quandt, E.;Bouchenoire, L.;Murphy, B. M.;Magnussen, O. M.;
7:4:51:9     Optimization of magnetoelectricity in piezoelectric-magnetostrictive bilayers
DOI:10.1088/0964-1726/19/12/125010  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:9  AU: Kuo, Hsin-Yi;Slinger, Alex;Bhattacharya, Kaushik;
7:4:51:10     Influence of thin interphase on magnetoelectric effect of coated cylindrical fibrous multiferroic composites
DOI:10.1063/1.4808318  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Yue, Y. M.;Xu, K. Y.;
7:4:52:1     Linear magnetoelectric coupling and ferroelectricity induced by the flexomagnetic effect in ferroics
DOI:10.1103/PhysRevB.84.174112  JN:PHYSICAL REVIEW B  PY:2011
  TC:13  AU: Eliseev, E. A.;Glinchuk, M. D.;Khist, V.;Skorokhod, V. V.;Blinc, R.;Morozovska, A. N.;
7:4:52:2     Colossal dielectric and magnetodielectric effect in Er2O3 nanoparticles embedded in a SiO2 glass matrix
DOI:10.1103/PhysRevB.82.104107  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Mukherjee, S.;Chen, C. H.;Chou, C. C.;Tseng, K. F.;Chaudhuri, B. K.;Yang, H. D.;
7:4:52:3     Magnetodielectric effect via a noncollinear-to-collinear spin reorientation in rare-earth iron garnets
DOI:10.1103/PhysRevB.83.012404  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Song, K. M.;Park, Y. A.;Lee, K. D.;Yun, B. K.;Jung, M. H.;Cho, J.;Jung, J. H.;Hur, N.;
7:4:52:4     Magnetic properties of MnO nanocrystals dispersed in a silica matrix
DOI:10.1016/j.jmmm.2011.12.020  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Mukherjee, S.;Yang, H. D.;Pal, A. K.;Majumdar, S.;
7:4:52:5     Magnetic nanoparticles induced dielectric enhancement in (La, Gd)(2)O-3: SiO2 composite systems
DOI:10.1016/j.jmmm.2013.06.054  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:0  AU: Kao, T. H.;Mukherjee, S.;Yang, H. D.;
7:4:52:6     Reply to "Comment on 'Colossal dielectric and magnetodielectric effect in Er2O3 nanoparticles embedded in a SiO2 glass matrix"'
DOI:10.1103/PhysRevB.84.056103  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Mukherjee, S.;Chen, C. H.;Chou, C. C.;Tseng, K. F.;Chaudhuri, B. K.;Yang, H. D.;
7:4:52:7     Searching for high-k RE2O3 nanoparticles embedded in SiO2 glass matrix
DOI:10.1063/1.3694737  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Mukherjee, S.;Lin, Y. H.;Kao, T. H.;Chou, C. C.;Yang, H. D.;
7:4:52:8     Enhanced dielectric response of Gd2Ti2O7 nanoparticles in SiO2 matrix
DOI:10.1016/j.materresbull.2013.10.002  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Dasgupta, Papri;Mukherjee, S.;Bhowmik, R. N.;Poddar, Asok;Mazumdar, Chandan;Ranganathan, R.;
7:4:52:9     Particle size reduction: A way to enhanced dielectric properties of magnetocapacitive La2/3Ca1/3MnO3
DOI:10.1063/1.3394004  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:1  AU: Yanez-Vilar, S.;Mira, J.;Sanchez-Andujar, M.;Castro-Garcia, S.;Fondado, A.;Rivas, J.;Senaris-Rodriguez, M. A.;
7:4:52:10     Spin density in frustrated magnets under mechanical stress: Mn-based antiperovskites
DOI:10.1063/1.3365136  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Lukashev, Pavel;Sabirianov, Renat F.;
7:4:53:1     Role of the interface on the magnetoelectric properties of BaTiO3 thin films deposited on polycrystalline Ni foils
DOI:10.1039/c3tc31571a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:7  AU: Liang, Weizheng;Li, Zheng;Bi, Zhenxing;Nan, Tianxiang;Du, Hui;Nan, Cewen;Chen, Chonglin;Jia, Quanxi;Lin, Yuan;
7:4:53:2     Growth Dynamics of Barium Titanate Thin Films on Polycrystalline Ni Foils Using Polymer-Assisted Deposition Technique
DOI:10.1021/am300205t  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:8  AU: Liang, Weizheng;Ji, Yanda;Nan, Tianxiang;Huang, Jiang;Bi, Zhenxing;Zeng, Huizhong;Du, Hui;Chen, Chonglin;Jia, Quanxi;Lin, Yuan;
7:4:53:3     In situ photoelectron study of the (Ba,Sr)TiO3/RuO2 contact formation
DOI:10.1016/j.jeurceramsoc.2009.05.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:17  AU: Schafranek, Robert;Schaffner, Judith;Klein, Andreas;
7:4:53:4     Compositional Substitutions and Aliovalent Doping of BaTiO3-Based Thin Films on Nickel Foils Prepared by Chemical Solution Deposition
DOI:10.1111/j.1551-2916.2009.03422.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Bretos, Inigo;Schneller, Theodor;Waser, Rainer;Hennings, Detlev F.;Halder, Sandip;Thomas, Florian;
7:4:53:5     Active low temperature oxidation as a route to minimize electrode-oxide interface reactions in nanoscale capacitors
DOI:10.1063/1.3456446  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Podpirka, Adrian;Viswanath, B.;Ramanathan, Shriram;
7:4:53:6     Pulsed Laser Deposition of BaTiO3 Thin Films on Different Substrates
DOI:10.1155/2010/756319  JN:JOURNAL OF NANOMATERIALS  PY:2010
  TC:6  AU: Yang, Yaodong;Wang, Zhiguang;Li, Jie-Fang;Viehland, D.;
7:4:53:7     Magnetoelectric properties of flexible BiFeO3/Ni tapes
DOI:10.1063/1.4731780  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Yan, L.;Zhuo, M.;Wang, Z.;Yao, J.;Haberkorn, N.;Zhang, S.;Civale, L.;Li, J.;Viehland, D.;Jia, Q. X.;
7:4:53:8     Electrophoretic deposition of BaTiO3 thin films from stable colloidal aqueous solutions
DOI:10.1016/j.jeurceramsoc.2014.02.023  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Bacha, Elsy;Renoud, Raphael;Terrisse, Helene;Borderon, Caroline;Richard-Plouet, Mireille;Gundel, Hartmut;Brohan, Luc;
7:4:53:9     Processing of chemical solution-deposited BaTiO3-based thin films on Ni foils
DOI:10.1007/s10853-010-4873-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:2  AU: Dechakupt, Tanawadee;Ko, Song Won;Lu, Sheng-Guo;Randall, Clive A.;Trolier-McKinstry, Susan;
7:4:53:10     An inexpensive and efficient method for the synthesis of BTO and STO at temperatures lower than 200 degrees C
DOI:10.1016/j.tsf.2010.12.190  JN:THIN SOLID FILMS  PY:2011
  TC:6  AU: Bacha, Elsy;Deniard, Philippe;Richard-Plouet, Mireille;Brohan, Luc;Gundel, Hartmut W.;
7:4:53:11     Ceramic-Controlled Piezoelectric Bulk Implanted with Pt Wire Based on BaTiO3 (Optical Microscopy, SEM, EDS) and PLZT (Optical Bi-dimensional Characterization)
DOI:10.1080/00150193.2011.620888  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Gonzalez-Moran, C. O.;Cruz-Orea, A.;Flores-Cuautle, J. J. A.;Minor-Martinez, A.;Elias-Vinas, D.;Suaste-Gomez, E.;
7:4:54:1     Precise Tuning of (YBa2Cu3O7-delta)(1-x):(BaZrO3)(x) Thin Film Nanocomposite Structures
DOI:10.1002/adfm.201304302  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:4  AU: Zhao, Run;Li, Weiwei;Lee, Joon Hwan;Choi, Eun Mi;Liang, Yan;Zhang, Wei;Tang, Rujun;Wang, Haiyan;Jia, Quanxi;MacManus-Driscoll, Judith L.;Yang, Hao;
7:4:54:2     Nanostructure manipulation and its influence on functionalities in self-assembled oxide thin films
DOI:10.1063/1.4901202  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Li, Weiwei;Wang, Liuyong;Zhao, Run;Tang, Rujun;Liang, Yan;Yang, Hao;
7:4:54:3     Superhydrophobic ceramic coatings enabled by phase-separated nanostructured composite TiO2-Cu2O thin films
DOI:10.1088/0957-4484/25/24/245601  JN:NANOTECHNOLOGY  PY:2014
  TC:1  AU: Aytug, Tolga;Bogorin, Daniela F.;Paranthaman, Parans M.;Mathis, John E.;Simpson, John T.;Christen, David K.;
7:4:54:4     Interactive Growth Effects of Rare-Earth Nanoparticles on Nanorod Formation in YBa2Cu3Ox Thin Films
DOI:10.1002/adfm.201203660  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:4  AU: Baca, F. Javier;Haugan, Timothy J.;Barnes, Paul N.;Holesinger, Terry G.;Maiorov, Boris;Lu, Rongtao;Wang, Xiang;Reichart, Joshua N.;Wu, Judy Z.;
7:4:54:5     Self-Assembly of Nanostructured, Complex, Multication Films via Spontaneous Phase Separation and Strain-Driven Ordering
DOI:10.1002/adfm.201202101  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2013
  TC:9  AU: Wee, Sung Hun;Gao, Yanfei;Zuev, Yuri L.;More, Karren L.;Meng, Jianyong;Zhong, Jianxin;Stocks, George M.;Goyal, Amit;
7:4:54:6     Kinetic Monte Carlo simulations of nanocolumn formation in two-component epitaxial growth
DOI:10.1063/1.3310066  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Zheng, Shu;Zhu, Wenguang;Gao, Y. F.;Stocks, G. M.;Zhang, Zhenyu;
7:4:54:7     Nanostructured columnar heterostructures of TiO2 and Cu2O enabled by a thin-film self-assembly approach: Potential for photovoltaics
DOI:10.1016/j.materresbull.2012.10.044  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:6  AU: Polat, Ozgur;Aytug, Tolga;Lupini, Andrew R.;Paranthaman, Parans M.;Ertugrul, Mehmet;Bogorin, Daniela F.;Meyer, Harry M.;Wang, Wei;Pennycook, Stephen J.;Christen, David K.;
7:4:54:8     The fabrication of controlled coral-like Cu2O films and their hydrophobic property
DOI:10.1016/j.apsusc.2012.12.043  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:7  AU: Ding, Yanbo;Li, Yao;Yang, Lili;Li, Zhenyu;Xin, Wuhong;Liu, Xin;Pan, Lei;Zhao, Jiupeng;
7:4:54:9     Influence of BaZrO3 dopant concentration on properties of YBa2Cu3O6+x films in magnetic fields up to 30 T
DOI:10.1063/1.3329539  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Huhtinen, H.;Irjala, M.;Paturi, P.;Shakhov, M. A.;Laiho, R.;
7:4:54:10     Structural transition of secondary phase oxide nanorods in epitaxial YBa2Cu3O7-delta films on vicinal substrates
DOI:10.1080/14786435.2012.705035  JN:PHILOSOPHICAL MAGAZINE  PY:2012
  TC:4  AU: Shi, Jack J.;Wu, Judy Z.;
7:4:55:1     Predicting effective magnetoelectric response in magnetic-ferroelectric composites via phase-field modeling
DOI:10.1063/1.4863941  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Yang, T. N.;Hu, Jia-Mian;Nan, C. W.;Chen, L. Q.;
7:4:55:2     Phase field model of dielectric and magnetic composites
DOI:10.1063/1.3446842  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Wang, Yu U.;
7:4:55:3     Phase-field model of multiferroic composites: Domain structures of ferroelectric particles embedded in a ferromagnetic matrix
DOI:10.1080/14786430903193266  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:9  AU: Wu, P. P.;Ma, X. Q.;Zhang, J. X.;Chen, L. Q.;
7:4:55:4     Equivalency principle for magnetoelectroelastic multiferroics with arbitrary microstructure: The phase field approach
DOI:10.1063/1.3428438  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Ni, Yong;He, Linghui;Khachaturyan, Armen G.;
7:4:55:5     Phase field modeling of current density distribution and effective electrical conductivity in complex microstructures
DOI:10.1063/1.4813392  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Jin, Yongmei M.;
7:4:55:6     Phase field modeling and simulation of particulate magnetoelectric composites: Effects of connectivity, conductivity, poling and bias field
DOI:10.1016/j.actamat.2014.02.015  JN:ACTA MATERIALIA  PY:2014
  TC:3  AU: Ma, Fengde D.;Jin, Yongmei M.;Wang, Yu U.;Kampe, S. L.;Dong, Shuxiang;
7:4:55:7     Control of the polarity of magnetization vortex by torsion
DOI:10.1063/1.4847375  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Wang, Jie;Li, Gui-Ping;Shimada, Takahiro;Fang, Hui;Kitamura, Takayuki;
7:4:55:8     Strain-induced polarity switching of magnetic vortex in Fe1-xGax alloys with different compositions
DOI:10.1063/1.4879902  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Li, Gui-ping;Wang, Jie;Shimada, Takahiro;Fang, Hui;Kitamura, Takayuki;
7:4:55:9     Effect of magnetic domain structure on longitudinal and transverse magnetoelectric response of particulate magnetostrictive-piezoelectric composites
DOI:10.1063/1.4869304  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ma, Fengde D.;Jin, Yongmei M.;Wang, Yu U.;Kampe, S. L.;Dong, Shuxiang;
7:4:56:1     Magnetocapacitance effects of Pb0.7Sr0.3TiO3/La0.7Sr0.3MnO3 thin film on Si substrate
DOI:10.1063/1.3552969  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Chen, Ying;Wang, Genshui;Zhang, Shuai;Lei, Xiuyun;Zhu, Junyu;Tang, Xiaodong;Wang, Yongling;Dong, Xianlin;
7:4:56:2     Magnetoelectric Characterization of Multiferroic Nanostructure Materials
DOI:10.1080/00150193.2014.923679  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kumar, Ashok;Katiyar, Ram. S.;Guo, R.;Bhalla, A. S.;
7:4:56:3     Study of physical properties of integrated ferroelectric/ferromagnetic heterostructures
DOI:10.1063/1.3437627  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Martinez, R.;Kumar, A.;Palai, R.;Katiyar, R. S.;Scott, J. F.;
7:4:56:4     Physical properties of bifunctional BST/LSMO nanocomposites
DOI:10.1063/1.4866555  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Beltran-Huarac, Juan;Martinez, Ricardo;Morell, Gerardo;
7:4:56:5     Observation of strong magnetoelectric effects in Ba0.7Sr0.3TiO3/La0.7Sr0.3MnO3 thin film heterostructures
DOI:10.1063/1.4717727  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Martinez, R.;Kumar, A.;Palai, R.;Srinivasan, G.;Katiyar, R. S.;
7:4:56:6     Diffuse phase transition and magnetoelectric effect in (f) Co0.8Ni0.2Fe2O4 + (1-f) PMN-PT particulate composites
DOI:10.1016/j.matchemphys.2009.09.012  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:5  AU: Sheikh, Arif D.;Mathe, V. L.;
7:4:56:7     Effect of Ferrite Concentration on Dielectric and Magnetoelectric Properties in (1-x)Pb(Mg1/3Nb2/3)(0.68)Ti0.32O3 +(x) CoFe2O4 Particulate Composites
DOI:10.1080/00150193.2012.674434  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Zabotto, F. L.;Gualdi, A. J.;De Oliveira, A. J. A.;Eiras, J. A.;Garcia, D.;
7:4:56:8     Effect of polarization-memory in SrTiO3/La0.9Sr0.1MnO3 multilayer on Si substrate
DOI:10.1063/1.3476358  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:1  AU: Zhang, Yingtang;Zhang, Yiming;Li, Shengtao;
7:4:57:1     Highly constrained ferroelectric [BaTiO3]((1-x)Lambda)/[BaZrO3](x Lambda) superlattices: X-ray diffraction and Raman spectroscopy
DOI:10.1063/1.4890513  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Belhadi, J.;El Marssi, M.;Gagou, Y.;Yuzyuk, Yu. I.;El Mendili, Y.;Raevski, I. P.;Bouyanfif, H.;Wolfman, J.;
7:4:57:2     Effect of periodicity and composition in artificial BaTiO3/(Ba,Sr)TiO3 superlattices
DOI:10.1103/PhysRevB.83.144108  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Ortega, N.;Kumar, A.;Maslova, O. A.;Yuzyuk, Yu. I.;Scott, J. F.;Katiyar, R. S.;
7:4:57:3     Ferroelectric BaTiO3/BaZrO3 superlattices: X-ray diffraction, Raman spectroscopy, and polarization hysteresis loops
DOI:10.1063/1.3496620  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: El Marssi, M.;Gagou, Y.;Belhadi, J.;De Guerville, F.;Yuzyuk, Yu. I.;Raevski, I. P.;
7:4:57:4     Phase transitions in BaTiO3 thin films and BaTiO3/BaZrO3 superlattices
DOI:10.1063/1.4901207  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Yuzyuk, Yu. I.;Sakhovoy, R. A.;Maslova, O. A.;Shirokov, V. B.;Zakharchenko, I. N.;Belhadi, J.;El Marssi, M.;
7:4:57:5     Ferroelectric and Dielectric Properties of BaTiO3/Ba0.30Sr0.70TiO3 Superlattices
DOI:10.1080/10584587.2012.673980  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Ortega, N.;Kumar, Ashok;Yuzyuk, Yu I.;Scott, J. F.;Katiyar, Rams;
7:4:57:6     Compositional engineering of BaTiO3/(Ba,Sr)TiO3 ferroelectric superlattices
DOI:10.1063/1.4820576  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Ortega, N.;Kumar, Ashok;Resto, Oscar;Maslova, O. A.;Yuzyuk, Yu. I.;Scott, J. F.;Katiyar, Ram S.;
7:4:57:7     Phase Diagrams of BaTiO3/BaZrO3 Superlattices
DOI:10.1080/10584587.2013.785795  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Shakhovoy, R. A.;Shirokov, V. B.;Yuzyuk, Yu. I.;
7:4:57:8     Strain tunable ferroelectric and dielectric properties of BaZrO3
DOI:10.1063/1.4883298  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Zhang, Yajun;Liu, Man;Wang, Jie;Shimada, Takahiro;Kitamura, Takayuki;
7:4:57:9     X-ray Diffraction Study of BaTiO3/(Ba1-xSrx)TiO3 Artificial Superlattices
DOI:10.1080/00150193.2013.785833  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Zakharchenko, I. N.;Bunina, O. A.;Maslova, O. A.;Yuzyuk, Yu. I.;Ortega, N.;Kumar, A.;Katiyar, R. S.;
7:4:57:10     Analysis for the nonlinear electro-optic modulation effect of BaTiO3 crystal thin-film waveguide modulators
DOI:10.1063/1.4803707  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Sun, DeGui;Fu, Xiuhua;Hall, Trevor J.;Jiang, Huilin;
7:4:58:1     Magnetodielectric effect in lead-free multiferroic CoFe2O4/K0.5Na0.5NbO3 bilayers
DOI:10.1016/j.matlet.2012.08.096  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: He, Shumin;Liu, Guolei;Xu, Jing;Yang, Jianye;Chen, Yanxue;Kang, Shishou;Yan, Shishen;Mei, Liangmo;
7:4:58:2     Crystal structure and multiferroic properties of BiFeO3-Na0.5K0.5NbO3 solid solution ceramics prepared by Pechini method
DOI:10.1016/j.matlet.2011.09.081  JN:MATERIALS LETTERS  PY:2012
  TC:12  AU: Huo, S. X.;Yuan, S. L.;Qiu, Y.;Ma, Z. Z.;Wang, C. H.;
7:4:58:3     Magnetodielectric effect in NaNbO3-NiFe2O4 particulate composite
DOI:10.1016/j.matlet.2013.02.010  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Han, Yemei;Li, Lingxia;Guo, Dong;Ren, Xiang;Xia, Wangsuo;
7:4:58:4     Fabrication of multiferroic Ba0.7Sr0.3TiO3-Ni0.8Zn0.2Fe2O4 composite nanofibers by electrospinning
DOI:10.1016/j.matlet.2012.09.060  JN:MATERIALS LETTERS  PY:2013
  TC:7  AU: Li, Bin;Wang, Chunqing;Zhang, Wei;Hang, Chunjin;Fei, Jingming;Wang, Hong;
7:4:58:5     Obtainment of exchange coupling coefficient of Ni0.6Zn0.4Fe2O4/SrFe12O19 composites
DOI:10.1016/j.matlet.2014.05.187  JN:MATERIALS LETTERS  PY:2014
  TC:5  AU: Xu, Y. F.;Ma, Y. Q.;Xu, S. T.;Zan, F. L.;Zheng, G. H.;Dai, Z. X.;
7:4:58:6     Monolithic magnetoelectric heterostructure with enhanced ferroelectric and piezoelectric properties and tunable magnetic properties
DOI:10.1016/j.matlet.2013.09.087  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Wang, Zhiguang;Li, Yanxi;Ge, Wenwei;Viswan, Ravindranath;Li, Jiefang;Viehland, Dwight;
7:4:58:7     Magnetoelectric Pb(Zr0.52Ti0.48)O-3-La0.65Sr0.35MnO3 composite thin films derived by the pulse laser deposition method
DOI:10.1016/j.matlet.2013.02.104  JN:MATERIALS LETTERS  PY:2013
  TC:5  AU: Lv, Xiaosong;Cheng, Chuanpin;Xiao, Yongguang;Tang, Minghua;Tang, Zhenhua;Cai, Haiquan;Zhou, Yichun;Li, Runwei;
7:4:59:1     Magnetodielectric effects of Y3Fe5-xTixO12+x/2 ceramics
DOI:10.1063/1.3680090  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Wu, Y. J.;Yu, C.;Chen, X. M.;Li, J.;
7:4:59:2     Enhanced Ferroelectric and Dielectric Properties of CoFe2O4-Pb(Zr0.53Ti0.47)O-3 Multiferroic Composite Thick Films
DOI:10.1111/j.1551-2916.2009.03463.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Chen, Wei;Zhu, Weiguang;Chen, Xiaofeng;Wang, Zhihong;
7:4:59:3     Magnetic and magnetodielectric properties of Bi-substituted yttrium iron garnet ceramics
DOI:10.1016/j.jmmm.2012.05.045  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Wu, Y. J.;Yu, C.;Chen, X. M.;Li, J.;
7:4:59:4     Effects of Al Substitution on Dielectric Response and Magnetic Behavior of Yttrium Iron Garnet Ceramics
DOI:10.1111/j.1551-2916.2011.05065.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Wu, Yong Jun;Yu, Chao;Chen, Xiang Ming;Li, Juan;
7:4:59:5     Dielectric relaxation and magnetic behavior of bismuth-substituted yttrium iron garnet
DOI:10.1063/1.3559488  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Siao, Yu-Jhan;Qi, Xiaoding;Lin, Chun-Rong;Huang, Jung-Chun-Andrew;
7:4:59:6     Effects of Bi-Substitution on Dielectric and Ferroelectric Properties of Yttrium Iron Garnet Ceramics
DOI:10.1080/00150193.2013.849963  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Wu, Y. J.;Zhang, T.;Li, J.;Chen, X. M.;
7:4:59:7     Magnetodielectric response in the charge ordered oxyborate Fe2OBO3
DOI:10.1063/1.3481661  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Yanez-Vilar, S.;Sanchez-Andujar, M.;Mira, J.;Castro-Garcia, S.;Rivas, J.;Senaris-Rodriguez, M. A.;
7:4:59:8     Synthesis and magnetic properties of hexagonal Y(Mn,Cu)O-3 multiferroic materials
DOI:10.1016/j.jmmm.2011.09.002  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:8  AU: Jeuvrey, L.;Pena, O.;Moure, A.;Moure, C.;
7:4:59:9     Dielectric properties of strontium iron holmium niobate ceramics
DOI:10.1016/j.ceramint.2012.10.067  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Sanjoom, K.;Tunkasiri, T.;Pengpat, K.;Eitssayeam, S.;Rujijanagul, G.;
7:4:59:10     Dielectric and magnetic properties of Y3-xTbxFe5O12 ferrimagnets
DOI:10.1063/1.3679766  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Siao, Yu-Jhan;Qi, Xiaoding;Lin, Chun-Rong;Huang, Jung-Chun-Andrew;
7:4:60:1     Enhanced magnetic performance of CoFe2O4/BaTiO3 multilayer nanostructures with a SrTiO3 ultra-thin barrier layer
DOI:10.1016/j.scriptamat.2012.04.030  JN:SCRIPTA MATERIALIA  PY:2012
  TC:9  AU: Aguesse, Frederic;Axelsson, Anna-Karin;Valant, Matjaz;Alford, Neil McN;
7:4:60:2     Quantitative strain analysis and growth mode of pulsed laser deposited epitaxial CoFe2O4 thin films
DOI:10.1016/j.actamat.2010.09.052  JN:ACTA MATERIALIA  PY:2011
  TC:11  AU: Axelsson, Anna-Karin;Aguesse, Frederic;Spillane, Liam;Valant, Matjaz;McComb, David W.;Alford, Neil McN;
7:4:60:3     Molecular Auxetic Behavior of Epitaxial Co-Ferrite Spinel Thin Film
DOI:10.1002/adfm.200901762  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:14  AU: Valant, Matjaz;Axelsson, Anna-Karin;Aguesse, Frederic;Alford, Neil M.;
7:4:60:4     Growth mechanism and magnetism of CoFe2O4 thin films; Role of the substrate
DOI:10.1016/j.jallcom.2013.05.081  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Axelsson, Anna-Karin;Aguesse, Frederic;Tileli, Vasiliki;Valant, Matjaz;Alford, Neil McN;
7:4:60:5     Electric-field control of magnetic properties of CoFe2O4 films on Pb(Mg1/3Nb2/3)O-3-PbTiO3 substrate
DOI:10.1016/j.tsf.2012.08.027  JN:THIN SOLID FILMS  PY:2012
  TC:8  AU: Ding, Hui;Cheah, Jun Wei;Chen, Lang;Sritharan, Thirumany;Wang, Junling;
7:4:60:6     Origin of enhanced magnetoelectric coupling in NiFe2O4/BaTiO3 multilayers studied by x-ray magnetic circular dichroism
DOI:10.1103/PhysRevB.89.115128  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Verma, V. K.;Singh, V. R.;Ishigami, K.;Shibata, G.;Harano, T.;Kadono, T.;Fujimori, A.;Chang, F. -H.;Lin, H. -J.;Huang, D. -J.;Chen, C. T.;Zhang, Yi;Liu, Jing;Lin, Yuanhua;Nan, Ce-Wen;Tanaka, A.;
7:4:60:7     Epitaxial growth of CoFe2O4 on SrTiO3 (100) and MgO (100) substrates without buffer layer by laser molecular beam epitaxy technique
DOI:10.1016/j.tsf.2010.10.035  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Yang, Z.;Ke, C.;Sun, L. L.;Zhu, W.;Lu, H. B.;Wang, L.;
7:4:61:1     Exchange-bias like hysteretic magnetoelectric-coupling of as-grown synthetic antiferromagnetic structures
DOI:10.1063/1.4748304  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Rizwan, Syed;Zhang, S.;Zhao, Y. G.;Han, X. F.;
7:4:61:2     Piezoelectric manipulation of Co/CoO exchange-bias bilayer system at low-temperature
DOI:10.1063/1.4820938  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Rizwan, Syed;Ali, S. I.;Zhang, Q. T.;Zhang, S.;Zhao, Y. G.;Anis-ur-Rehman, M.;Tufail, Muhammad;Han, X. F.;
7:4:61:3     Magnetic field-induced elastic bending in bilayers of Tb1-xDyxFe2-y and Pb(Zr1-zTiz)O-3
DOI:10.1016/j.jmmm.2014.04.025  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Tao Jin;Wu Qichao;Zhang Ning;
7:4:61:4     Electric-field control of CoFeB/IrMn exchange bias system
DOI:10.1063/1.4754842  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Rizwan, Syed;Yu, G. Q.;Zhang, S.;Zhao, Y. G.;Han, X. F.;
7:4:61:5     Piezoelectric enhancement of giant magnetoresistance in spin-valves with different magnetic anisotropies
DOI:10.1063/1.4775574  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Rizwan, Syed;Zhang, S.;Yu, Tian;Zhao, Y. G.;Han, X. F.;
7:4:61:6     Room temperature magneto-birefringence in composites of stress-birefringence and magnetostriction
DOI:10.1063/1.4803031  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Luo, X. B.;Wu, D.;Zhang, N.;
7:4:61:7     Magneto-optical coupling in bilayer composites of Terfenol-D and Polycarbonate
DOI:10.1007/s00339-013-8132-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Luo Xiaobin;Wu Tianxiang;Zhang Ying;Zhang Ning;
7:4:61:8     Exchange-bias like hysteretic magnetoelectric-coupling of as-grown synthetic antiferromagnetic structures (vol 101, 082414, 2012)
DOI:10.1063/1.4754144  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Rizwan, Syed;Zhang, S.;Zhao, Y. G.;Han, X. F.;
7:4:61:9     Room temperature magneto-birefringence in composites of stress-birefringence and magnetostriction (vol 113, 173903, 2013)
DOI:10.1063/1.4824743  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Luo, X. B.;Wu, D.;Zhang, N.;
7:4:62:1     Multiferroic Ni0.6Zn0.4Fe2O4-BaTiO3 nanostructures: Magnetoelectric coupling, dielectric, and fluorescence
DOI:10.1063/1.4896118  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Verma, Kuldeep Chand;Singh, Sukhdeep;Tripathi, S. K.;Kotnala, R. K.;
7:4:62:2     Multiferroic properties of Ba(FexTi1-x)O-3 nanorods
DOI:10.1016/j.matlet.2011.06.114  JN:MATERIALS LETTERS  PY:2011
  TC:10  AU: Kaur, Jaspreet;Kotnala, R. K.;Verma, Kuldeep Chand;
7:4:62:3     Raman spectra, photoluminescence, magnetism and magnetoelectric coupling in pure and Fe doped BaTiO3 nanostructures
DOI:10.1016/j.jallcom.2013.05.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Verma, Kuldeep Chand;Gupta, Vinay;Kaur, Jaspreet;Kotnala, R. K.;
7:4:62:4     The magnetoelectric properties of La0.7Sr0.3MnO3/BaTiO3 bilayers with various orientations
DOI:10.1016/j.jallcom.2013.01.143  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Li, Tingxian;Zhang, Feipeng;Fang, Hui;Li, Kuoshe;Yu, Fengjun;
7:4:62:5     Thickness and frequency dependence of magnetoelectric effect for epitaxial La0.7Sr0.3MnO3/BaTiO3 bilayer
DOI:10.1016/j.jallcom.2014.01.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Li, Tingxian;Li, Kuoshe;Hu, Zhou;
7:4:62:6     Magnetoelectric effect in La0.7Sr0.3MnO3-BaTiO3 core-shell nanocomposite
DOI:10.1016/j.materresbull.2012.12.043  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Nayek, Chiranjib;Sahoo, Kishor Kumar;Murugavel, P.;
7:4:62:7     Anisotropic electronic structure in single crystalline orthorhombic TbMnO3 thin films
DOI:10.1016/j.tsf.2009.09.089  JN:THIN SOLID FILMS  PY:2010
  TC:8  AU: Wu, K. H.;Gou, I. C.;Luo, C. W.;Uen, T. M.;Lin, J. -Y.;Juang, J. Y.;Chen, C. K.;Lee, J. M.;Chen, J. M.;
7:4:63:1     Enhanced magnetoelectric effect in a stress-biased lead magnesium niobate-lead titanate single crystal/Terfenol-D alloy magnetoelectric sensor
DOI:10.1063/1.3536636  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Lam, K. H.;Lo, C. Y.;Dai, J. Y.;Chan, H. L. W.;Luo, H. S.;
7:4:63:2     Frequency response of magnetoelectric 1-3-type composites
DOI:10.1063/1.3399703  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Lam, K. H.;Lo, C. Y.;Chan, H. L. W.;
7:4:63:3     Magnetoelectricity of lateral 1-3 type composites with CoFe2O4 ferromagnetic microstrips embedded in (K,Na)NbO3-based piezoceramic substrate
DOI:10.1063/1.3624668  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Xu, Ying;Li, Jing-Feng;Ma, Jing;Nan, Ce-Wen;
7:4:63:4     Magnetoelectric response of AlN/[(Fe90Co10)(78)Si12B10 + Terfenol-D] composite films
DOI:10.1063/1.4863487  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Tong, Bei;Yang, Xiaofei;Ouyang, Jun;Lin, Gengqi;Zhang, Yue;Chen, Shi;
7:4:63:5     LPF-doped core-shell structure based CFO/PLZT 0-3 magnetoelectric composite ceramics
DOI:10.1016/j.jallcom.2014.08.016  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Shi, Dong-liang;Lam, Kwok Ho;Li, Kun;
7:4:63:6     Magnetoelectric effect in lead-free sandwich film composed of Co-ferrite and (K0.5Na0.5)NbO3-based ferroelectric
DOI:10.1016/j.matlet.2014.05.149  JN:MATERIALS LETTERS  PY:2014
  TC:4  AU: Zhou, Yun;Ye, Youxiang;Wang, Jianfeng;Zhang, Jingji;Jiao, Zhiwei;Zhang, Jincang;
7:4:63:7     Enhanced magnetoelectrical coupling in cobalt ferrite/lead lanthanum zirconate titanate 0-3 composites through phase boundary modification
DOI:10.1016/j.matchemphys.2013.07.039  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:1  AU: Li, Kun;Shi, Dong-Liang;Zhu, Yin;Wang, Yu;Chan, Helen Lai-wa;Peng, Song;
7:4:63:8     Kerf profile and piezoresponse study of the laser micro-machined PMN-PT single crystal using 355 nm Nd:YAG
DOI:10.1016/j.materresbull.2013.05.025  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Lam, K. H.;Chen, Y.;Au, K.;Chen, J.;Dai, J. Y.;Luo, H. S.;
7:4:64:1     Magnetic field modulated dielectric relaxation behavior of Pt/BiScO3-PbTiO3/La0.7Sr0.3MnO3 heterostructure in metal-insulator transition region: An equivalent-circuit method
DOI:10.1063/1.3667289  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Zhu, Junyu;Yang, Jing;Bai, Wei;Duan, Chungang;Zhang, Shuai;Wang, Genshui;Dong, Xianlin;Remiens, Denis;Tang, Xiaodong;
7:4:64:2     The magnetodielectric effect in BaTiO3-SrFe12O19 nanocomposites
DOI:10.1039/c3tc31737d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:4  AU: Stingaciu, M.;Reuvekamp, P. G.;Tai, C. -W.;Kremer, R. K.;Johnsson, M.;
7:4:64:3     Magnetodielectric response in 0.36BiScO(3)-0.64PbTiO(3)/La0.7Sr0.3MnO3 thin films and the corresponding model modifications
DOI:10.1063/1.3610421  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Zhang, Shuai;Dong, Xianlin;Gao, Feng;Chen, Ying;Cao, Fei;Zhu, Junyu;Tang, Xiaodong;Wang, Genshui;
7:4:64:4     Dielectric, magnetoelectric and magnetodielectric properties in CMFO-SBN composites
DOI:10.1016/j.ceramint.2012.08.081  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Jigajeni, S. R.;Tarale, A. N.;Salunkhe, D. J.;Joshi, P. B.;Kulkarni, S. B.;
7:4:64:5     Large magnetodielectric response in Pr0.6Ca0.4MnO3/polyvinylidene fluoride nanocomposites
DOI:10.1063/1.3571443  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Chandrasekhar, K. Devi;Das, A. K.;Venimadhav, A.;
7:4:64:6     Magnetodielectric properties of La0.67Sr0.33MnO3 and Ba0.7Sr0.3TiO3 thin film heterostructures
DOI:10.1007/s13391-012-2027-9  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:6  AU: Tarale, Arjun;Kolekar, Y. D.;Mathe, V. L.;Kulkarni, S. B.;Reddy, V. R.;Joshi, Pradeep;
7:4:64:7     Growth and Electric Properties of MPB BiScO3-PbTiO3 Thin Films on La0.7Sr0.3MnO3-Coated Silicon Substrates
DOI:10.1111/j.1551-2916.2010.03630.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Zhang, Shuai;Dong, Xianlin;Chen, Ying;Cao, Fei;Zhang, Yuanyuan;Wang, Genshui;Sama, Nossikpendou;Remiens, Denis;
7:4:64:8     Large Magnetodielectric Effect in (1-X) La2NiMnO6-(X) La2/3Sr1/3MnO3 Composites
DOI:10.1080/00150193.2010.486246  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Hou, Y.;Yu, Q. X.;Yao, Y. P.;Huang, X. H.;Dong, S. N.;Chen, Y.;Li, X. G.;
7:4:64:9     Magnetic field modulated dielectric relaxation behavior of Pt/BiScO3-PbTiO3/La0.7Sr0.3MnO3 heterostructure in metal-insulator transition region: An equivalent-circuit method (vol 110, 114118, 2011)
DOI:10.1063/1.3679429  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Zhu, Junyu;Yang, Jing;Bai, Wei;Duan, Chungang;Zhang, Shuai;Wang, Genshui;Dong, Xianlin;Remiens, Denis;Tang, Xiaodong;
7:4:65:1     Inequivalence of direct and converse magnetoelectric coupling at electromechanical resonance
DOI:10.1063/1.4827875  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Wu, Gaojian;Nan, Tianxiang;Zhang, Ru;Zhang, Ning;Li, Shandong;Sun, Nian X.;
7:4:65:2     Uniformity of direct and converse magnetoelectric effects in magnetostrictive-piezoelectric composites
DOI:10.1063/1.4896572  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Liu, Guoxi;Dong, Shuxiang;
7:4:65:3     Equivalence of direct and converse magnetoelectric coefficients in strain-coupled two-phase systems
DOI:10.1063/1.3693375  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Lou, Jing;Pellegrini, Gerry N.;Liu, Ming;Mathur, Neil D.;Sun, Nian X.;
7:4:65:4     Electrical impedance dependence on the direct and converse magnetoelectric resonances in magnetostrictive/piezoelectric laminated composites
DOI:10.1063/1.4766405  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Wu, Zheng;Xiang, Zhihui;Jia, Yanmin;Zhang, Yihe;Luo, Haosu;
7:4:65:5     Magnetostrictive/piezoelectric drum magnetoelectric transducer for H-2 detection
DOI:10.1016/j.ijhydene.2013.09.035  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2013
  TC:1  AU: Jia, Yanmin;Xue, A'Xi;Zhou, Zhihua;Wu, Zheng;Chen, Jianrong;Ma, Ke;Zhang, Yihe;Zhou, Jiayi;Wang, Yu;Chan, Helen Lai Wa;
7:4:66:1     Preparation and multiferroic properties of 2-2 type CoFe2O4/Pb(Zr,Ti)O-3 composite films with different structures
DOI:10.1016/j.ceramint.2014.01.146  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Shi, Min;Zuo, Ruzhong;Xu, Yudong;Wang, Lei;Gu, Cang;Su, Hailin;Zhong, Jiagang;Yu, Guiyang;
7:4:66:2     Enhanced magnetoelectric coupling in Pb(Zr0.52Ti0.48)O-3 film-on-CoFe2O4 bulk ceramic composite with LaNiO3 bottom electrode
DOI:10.1007/s10853-012-6832-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:9  AU: Wang, Jing;Li, Zheng;Shen, Yang;Lin, Yuanhua;Nan, C. W.;
7:4:66:3     Active ferroelectricity in nanostructured multiferroic BiFeO3 bulk ceramics
DOI:10.1039/c3tc31140f  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:1  AU: Jiang, Qinghui;Ning, Huanpo;Zhang, Qi;Cain, Markys;Reece, Michael J.;Yan, Haixue;
7:4:66:4     Investigation of spin phonon coupling in BiFeO3 based system by Fourier transform infrared spectroscopy
DOI:10.1063/1.4831676  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Gaikwad, V. M.;Acharya, S. A.;
7:4:66:5     Spin-glass behavior of nanocrystalline multiferroic bismuth ferrite lead titanate
DOI:10.1039/c0jm02273j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:8  AU: Tuboltsev, Vladimir;Savin, Alexander;Sakamoto, Wataru;Hieno, Atsushi;Yogo, Toshinobu;Raisanen, Jyrki;
7:4:66:6     Thickness dependence of magnetoelectric response for composites of Pb(Zr0.52Ti0.48)O-3 films on CoFe2O4 ceramic substrates
DOI:10.1063/1.4893542  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Wang, Jing;Wu, Xia;Peng, Renci;Wang, Jianjun;Deng, Chaoyong;Zhu, Kongjun;
7:4:66:7     The ferroelectric and ferromagnetic characterization of CoFe2O4/Pb(Mg1/3Nb2/3)O-3-PbTiO3 multilayered thin films
DOI:10.1016/j.apsusc.2011.02.080  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:4  AU: Guo, Hong-li;Liu, Guo;Li, Xue-dong;Li, Hai-min;Zhang, Wan-li;Zhu, Jian-guo;Xiao, Ding-quan;
7:4:67:1     Magnetoelectric coupling in solution derived 3-0 type PbZr0.52Ti0.48O3:xCoFe(2)O(4) nanocomposite films
DOI:10.1063/1.4799174  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: McDannald, A.;Staruch, M.;Sreenivasulu, G.;Cantoni, C.;Srinivasan, G.;Jain, M.;
7:4:67:2     Surface contributions to the alternating current and direct current magnetic properties of oleic acid coated CoFe2O4 nanoparticles
DOI:10.1063/1.4770484  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: McDannald, A.;Staruch, M.;Jain, M.;
7:4:67:3     Stress magnetization model for magnetostriction in multiferroic composite
DOI:10.1063/1.4816785  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Gualdi, A. J.;Zabotto, F. L.;Garcia, D.;de Oliveira, A. J. A.;
7:4:67:4     Structural and Magnetic Properties of CoFe2O4 and Co0.5Zn0.5Fe2O4 Nanoparticles for the Magnetoelectric Composite Films
DOI:10.1080/10584587.2011.621057  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:5  AU: Staruch, M.;Hires, D.;Violette, D.;Navarathne, D.;Sotzing, G. A.;Jain, M.;
7:4:67:5     Anisotropy in magnetoelectric composites
DOI:10.1063/1.4883639  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Jones, Jacob L.;Starr, Justin D.;Andrew, Jennifer S.;
7:4:67:6     Controllable microstructures and multiferroic properties of Pb(Zr0.53Ti0.47)O-3-CoFe2O4 composite films
DOI:10.1016/j.apsusc.2010.11.031  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:2  AU: Ding, Lu-Yi;Wu, Fei-Xiang;Chen, Yan-Bin;Gu, Zheng-Bin;Zhang, Shan-Tao;
7:4:67:7     Angular Dependence of the Magnetoelectric Effect on PMN-PT/CFO Particulate Composites
DOI:10.1080/10584587.2011.616428  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:3  AU: Zabotto, F. L.;Gualdi, A. J.;Eiras, J. A.;de Oliveira, A. J. A.;Garcia, D.;
7:4:68:1     The lumped equivalent circuit model of the multi-passband tunable microwave magnetoelectric filters
DOI:10.1063/1.4892938  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhou, Hao-Miao;Lian, Jing;Zhu, Feng-Jie;
7:4:68:2     A generalized lumped element modeling of electrically and magnetically dual-tunable microwave magnetoelectric resonators
DOI:10.1063/1.4819109  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Zhou, Hao-Miao;Li, Chao;Zhu, Feng-Jie;Qu, Shao-Xing;
7:4:68:3     A generalized lumped element modeling of electrically and magnetically dual-tunable coupled microstrip filters
DOI:10.1063/1.4825314  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Zhou, Hao-Miao;Zhu, Feng-Jie;
7:4:68:4     Present status of theoretical modeling the magnetoelectric effect in magnetostrictive-piezoelectric nanostructures. Part II: Magnetic and magnetoacoustic resonance ranges
DOI:10.1063/1.3313920  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Bichurin, M. I.;Petrov, V. M.;Averkin, S. V.;Liverts, E.;
7:4:68:5     A generalized lumped-element equivalent circuit for tunable magnetoelectric microwave devices with multi-magnetoelectric laminates
DOI:10.1063/1.4878160  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhou, Hao-Miao;Lian, Jing;
7:4:69:1     Structural characterization of barium titanate-cobalt ferrite composite powders
DOI:10.1016/j.ceramint.2011.01.017  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:10  AU: Leonel, L. V.;Righi, A.;Mussel, W. N.;Silva, J. B.;Mohallem, N. D. S.;
7:4:69:2     Room temperature structural, morphological, and enhanced ferroelectromagnetic properties of xBa(0.7)Ca(0.3)TiO(3)-(1-x)BaFe0.2Ti0.8O3 multiferroic composites
DOI:10.1063/1.4714657  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Puli, V. S.;Coondoo, I.;Panwar, N.;Srinivas, A.;Katiyar, R. S.;
7:4:69:3     Electromagnetic properties of multiferroic magnetoelectric BaTiO3-CoxFe3-xO4 core-shell particles obtained by homogeneous coprecipitation
DOI:10.1016/j.jmmm.2012.08.033  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:5  AU: Yu, Mei;Hu, Jingzhi;Liu, Jianhua;Li, Songmei;
7:4:69:4     Structure, Ferroelectric, Dielectric and Energy Storage Studies of Ba0.70Ca0.30TiO3, Ba(Zr0.20Ti0.80)O-3 Ceramic Capacitors
DOI:10.1080/10584587.2014.912939  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:2  AU: Puli, Venkata Sreenivas;Pradhan, Dhiren K.;Riggs, Brian C.;Chrisey, Douglas B.;Katiyar, Ram. S.;
7:4:69:5     Structural evolution of Ba8Ti3Nb4O24 from BaTiO3 using a series of Ba(Ti1-5xNb4x)O-3 solid solutions
DOI:10.1016/j.jallcom.2013.09.016  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Barrientos Hernandez, F. R.;Lira Hernandez, I. A.;Gomez Yanez, C.;Arenas Flores, A.;Cabrera Sierra, R.;Perez Labra, M.;
7:4:69:6     Improvement of the physical properties of novel (1-y) Co0.8Cu0.2Fe2O4 + (y) SrTiO3 nanocomposite
DOI:10.1016/j.materresbull.2013.01.034  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Ahmed, M. A.;Mansour, S. F.;Abdo, M. A.;
7:4:69:7     Influence of Ni/Co molar ratio on electromagnetic properties and microwave absorption performances for Ni/Co paraffin composites
DOI:10.1016/j.mmm.2014.01.058  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:4  AU: Yan, S. J.;Dai, S. L.;Ding, H. Y.;Wang, Z. Y.;Liu, D. B.;
7:4:69:8     In situ investigation of chemical reactions between BaCO3 and anatase or rutile TiO2
DOI:10.1007/s10853-012-6310-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:5  AU: Tsuzuku, Koichiro;Couzi, Michel;
7:4:69:9     Effect of Nd Doping on Structural, Dielectric and Ferroelectric Properties of Ba(Zr0.05Ti0.95)O-3 Ceramic
DOI:10.1080/10584587.2010.504401  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:3  AU: Mahajan, Sandeep;Thakur, O. P.;Sreenivas, K.;Prakash, Chandra;
7:4:70:1     Electric-field-induced changes in magnetization in PZT/Insulator/CoFe nanometer multilayer
DOI:10.1016/j.jmmm.2012.06.018  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Zhang, Hui;
7:4:70:2     Magnetostriction and its inverse effect in Tb0.3Dy0.7Fe2 alloy
DOI:10.1063/1.3392801  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Zhang, Hui;Zeng, Dechang;
7:4:70:3     Field-induced changes in polarization and magnetization in Tb0.3Dy0.7Fe2/PZT laminate composite
DOI:10.1063/1.3684984  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Zhang, Hui;
7:4:70:4     Strain effects on formation and migration energies of oxygen vacancy in perovskite ferroelectrics: A first-principles study
DOI:10.1063/1.4804941  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Yang, Q.;Cao, J. X.;Ma, Y.;Zhou, Y. C.;Jiang, L. M.;Zhong, X. L.;
7:4:70:5     Anisotropic magnetomechanical effect in Tb0.3Dy0.7Fe2 alloy
DOI:10.1016/j.jmmm.2011.08.007  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Zhang, Hui;
7:4:70:6     Thermo-electromechanical response of a ferroelectric perovskite from molecular dynamics simulations
DOI:10.1063/1.3646377  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Zeng, Xiaowei;Cohen, R. E.;
7:4:70:7     Electric field induced magnetization of multiferroic horizontal heterostructures
DOI:10.1063/1.3496626  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Zhong, Chong Gui;Ji, Xian Ming;Zhao, Yong Lin;Zhou, Peng Xia;Cao, Hai Xia;Dong, Zheng Chao;
7:4:71:1     Nanoscale ordering and multiferroic behavior in Pb(Fe1/2Ta1/2)O-3
DOI:10.1103/PhysRevB.82.134104  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Martinez, R.;Palai, R.;Huhtinen, H.;Liu, J.;Scott, J. F.;Katiyar, R. S.;
7:4:71:2     Dielectric and polarized Raman spectroscopic studies on 0.85Pb(Zn1/3Nb2/3)O-3-0.15PbTiO(3) single crystal
DOI:10.1063/1.4757958  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Mishra, K. K.;Arora, A. K.;Tripathy, S. N.;Pradhan, Dillip;
7:4:71:3     Vibrational, magnetic, and dielectric behavior of La-substituted BiFeO3-PbTiO3
DOI:10.1063/1.3673240  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Mishra, K. K.;Satya, A. T.;Bharathi, A.;Sivasubramanian, V.;Murthy, V. R. K.;Arora, A. K.;
7:4:71:4     Coexistence of weak ferromagnetism and polar lattice distortion in epitaxial NiTiO3 thin films of the LiNbO3-type structure
DOI:10.1116/1.4801664  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:3  AU: Varga, Tamas;Droubay, Timothy C.;Bowden, Mark E.;Colby, Robert J.;Manandhar, Sandeep;Shutthanandan, Vaithiyalingam;Hu, Dehong;Kabius, Bernd C.;Apra, Edoardo;Shelton, William A.;Chambers, Scott A.;
7:4:71:5     x-T phase diagram of La-substituted BiFeO3-PbTiO3
DOI:10.1063/1.3624906  JN:AIP ADVANCES  PY:2011
  TC:2  AU: Mishra, K. K.;Sarguna, R. M.;Khan, Shabana;Arora, A. K.;
7:4:71:6     Study of field-induced phase transitions in 0.68PbMg(1/3)Nb(2/3)O(3)-0.32PbTiO(3) relaxor single crystal by polarized micro-Raman spectroscopy
DOI:10.1063/1.4894418  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chen, Chao;Deng, Hao;Li, Xiaobing;Zhang, Haiwu;Huang, Ting;Lin, Di;Wang, Sheng;Zhao, Xiangyong;Hu, Zhigao;Luo, Haosu;
7:4:72:1     Adiabatic to non adiabatic change in conduction mechanism of Zn doped La0.67Sr0.33MnO3 perovskite
DOI:10.1016/j.jallcom.2013.01.183  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Ahmed, Hilal;Khan, Shakeel;Khan, Wasi;Nongjai, Razia;Khan, Imran;
7:4:72:2     Study of structural, electrical and magnetic properties of Zn doped La0.67Sr0.33MnO3
DOI:10.1016/j.jallcom.2012.02.110  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Ahmed, Hilal;Khan, Shakeel;Khan, Wasi;Nongjai, Razia;Khan, Imran;
7:4:72:3     Influence of Pb doping on the structural, optical and electrical properties of nanocomposite Se-Te thin films
DOI:10.1016/j.jallcom.2010.05.016  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Khan, M. A. Majeed;Khan, M. Wasi;Alhoshan, Mansour;AlSalhi, M. S.;Aldwayyan, A. S.;Zulfequar, M.;
7:4:72:4     Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates
DOI:10.1007/s00339-014-8295-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Navasery, M.;Halim, S. A.;Dehzangi, A.;Soltani, N.;Bahmanrokh, G.;Erfani, M., II;Kamalianfar, A.;Pan, K. Y.;Chang, S. C.;Chen, S. K.;Lim, K. P.;Awang Kechik, M. M.;
7:4:72:5     Enhancement of localization phenomena driven by covalency in the SrBiMn1.75Ti0.25O6 manganite
DOI:10.1016/j.jallcom.2012.01.124  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Asensio de Lucas, E.;Alvarez-Serrano, I.;Cuello, G. J.;Garcia-Hernandez, M.;Lopez, M. L.;Pico, C.;Veiga, M. L.;
7:4:72:6     Change of conduction mechanism in the impedance of grain boundaries in Pr0.4Ca0.6Mn03
DOI:10.1016/j.jmmm.2012.12.015  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:9  AU: Shah, Matiullah;Nadeem, M.;Idrees, M.;Atif, M.;Akhtar, M. J.;
7:4:72:7     Ferromagnetism and adiabatic to non-adiabatic switching process in La0.33Sr0.67Mn1-xFexO3 (0 <= x <= 0.02) manganite
DOI:10.1016/j.jmmm.2014.04.063  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Ahmed, Hilal;Khan, Shakeel;Khan, Wasi;Nongjai, Razai;Khan, Imran;
7:4:72:8     Synthesis and evolution of magnetic properties of Ni doped La2/3Sr1/3Mn1-xNixO3 nanoparticles
DOI:10.1063/1.4707757  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Gupta, Maneesha;Khan, Wasi;Yadav, Poonam;Kotnala, R. K.;Azam, A.;Naqvi, A. H.;
7:4:73:1     Synthesis of Necklace-like Magnetic Nanorings
DOI:10.1021/la9041343  JN:LANGMUIR  PY:2010
  TC:28  AU: Wang, Hui;Chen, Qian-Wang;Sun, Yu-Bing;Wang, Ming-Sheng;Sun, Li-Xia;Yan, Wen-Sheng;
7:4:73:2     High-Yield Solvothermal Synthesis of Magnetic Peapod Nanocomposites via the Capture of Preformed Nanoparticles in Scrolled Nanosheets
DOI:10.1021/cm402352k  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:4  AU: Adireddy, Shiva;Carbo, Cecilia E.;Yao, Yuan;Vargas, Jose M.;Spinu, Leonard;Wiley, John B.;
7:4:73:3     In situ synthesis of cobalt nanoparticles in functionalized liquid crystalline polymers
DOI:10.1039/c0jm03872e  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:13  AU: Zadoina, L.;Soulantica, K.;Ferrere, S.;Lonetti, B.;Respaud, M.;Mingotaud, A. -F.;Falqui, A.;Genovese, A.;Chaudret, B.;Mauzac, M.;
7:4:73:4     Self-assembly and flux closure studies of magnetic nanoparticle rings
DOI:10.1039/c1jm11916h  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:17  AU: Wei, Alexander;Kasama, Takeshi;Dunin-Borkowski, Rafal E.;
7:4:73:5     Ultrasonic synthesis, formation mechanism and optical properties of single-crystalline Pb(OH)Br microrings
DOI:10.1016/j.matchemphys.2011.12.035  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:0  AU: Wang, Guizhen;Wan, Gengping;Lin, Shiwei;Yu, Wenhui;
7:4:73:6     Periodic nanocomposites: A simple path for the preferential self-assembly of nanoparticles in block-copolymers
DOI:10.1016/j.polymer.2010.02.053  JN:POLYMER  PY:2010
  TC:3  AU: Gazit, Oz;Cohen, Yachin;Tannenbaum, Rina;
7:4:74:1     Preparation of Cobalt Ferrite Thick Films and Their Magnetic and Electrical Properties
DOI:10.1111/j.1551-2916.2010.04215.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Chen, Wei;Zhu, Weiguang;
7:4:74:2     Tape casting of cobalt ferrite from nonaqueous slurry
DOI:10.1016/j.jmmm.2012.07.042  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Jian, Gang;Zhou, Dongxiang;Yang, Junyou;Fu, Qiuyun;
7:4:74:3     Structural and dielectric properties of laser ablated BaTiO3 films deposited over electrophoretically dispersed CoFe2O4 grains
DOI:10.1063/1.4900516  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Barbosa, J. G.;Gomes, I. T.;Pereira, M. R.;Moura, C.;Mendes, J. A.;Almeida, B. G.;
7:4:74:4     Cobalt ferrite dispersion in organic solvents for electrophoretic deposition: Influence of suspension parameters on the film microstructure
DOI:10.1016/j.matchemphys.2013.09.050  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:1  AU: Jian, Gang;Lu, Sheng;Zhou, Dongxiang;Yang, Junyou;Fu, Qiuyun;
7:4:74:5     Structural and magnetic properties of free-standing Ni0.23Cu0.11Zn0.66Fe2O4 thick films prepared using a modified tape-casting method
DOI:10.1016/j.jmmm.2009.09.078  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Yang, Z. H.;Li, Z. W.;Kong, L. B.;
7:4:74:6     Electrophoretic Deposition of CoFe2O4 Nanograins Dispersed in a Laser Ablated BaTiO3 Matrix
DOI:10.1080/00150193.2011.594344  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Barbosa, J. G.;Pereira, M. R.;Moura, C.;Mendes, J. A.;Almeida, B. G.;
7:4:75:1     Slow magnetic dynamics in the (K3M3M2F15)-M-II-F-III multiferroic system
DOI:10.1063/1.4757006  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Pajic, Damir;Jaglicic, Zvonko;Trontelj, Zvonko;
7:4:75:2     Magnetic properties of multiferroic K3Cr2Fe3F15
DOI:10.1063/1.3309205  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Blinc, R.;Cevc, P.;Potocnik, A.;Zemva, B.;Goreshnik, E.;Hanzel, D.;Gregorovic, A.;Trontelj, Z.;Jaglicic, Z.;Laguta, V.;Perovic, M.;Dalal, N. S.;Scott, J. F.;
7:4:75:3     Muon spin relaxation in some multiferroic fluorides
DOI:10.1103/PhysRevB.81.214420  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Potocnik, Anton;Zorko, Andrej;Arcon, Denis;Goreshnik, Evgenij;Zemva, Boris;Blinc, Robert;Cevc, Pavel;Trontelj, Zvonko;Jaglicic, Zvonko;Scott, James F.;
7:4:75:4     Magnetic memory effect in multiferroic K3Fe5F15 and K3Cr2Fe3F15
DOI:10.1063/1.4811762  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Jaglicic, Z.;Pajic, D.;Trontelj, Z.;Dolinsek, J.;Jagodic, M.;
7:4:75:5     Magnetic and Mossbauer characterization of the multiferroic fluoride K3Fe5F15
DOI:10.1103/PhysRevB.84.104418  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Mezzadri, F.;Calestani, G.;Pernechele, C.;Solzi, M.;Spina, G.;Cianchi, L.;Del Giallo, F.;Lantieri, M.;Buzzi, M.;Gilioli, E.;
7:4:75:6     Phase Separation and Phase Transitions in Multiferroic K0.58FeF3 with the Tetragonal Tungsten Bronze Structure
DOI:10.1021/cm202713n  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:6  AU: Reisinger, Sandra A.;Leblanc, Marc;Mercier, Anne-Marie;Tang, Chiu C.;Parker, Julia E.;Morrison, Finlay D.;Lightfoot, Philip;
7:4:75:7     Magnetism in multiferroic Pb5Cr3F19
DOI:10.1103/PhysRevB.85.054419  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Blinc, Robert;Cevc, Pavel;Tavcar, Gasper;Zemva, Boris;Laguta, Valentin;Trontelj, Zvonko;Jagodic, Marko;Pajic, Damir;Balcytis, Armandas;Scott, James F.;
7:4:76:1     Enhanced low field magnetoresistance in nanocrystalline La0.7Sr0.3MnO3 synthesized on MgO nanowires
DOI:10.1063/1.3432113  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Zhang, Z.;Ranjith, R.;Xie, B. T.;You, L.;Wong, L. M.;Wang, S. J.;Wang, J. L.;Prellier, W.;Zhao, Y. G.;Wu, T.;
7:4:76:2     Preparation and Characterization of Lanthanum Strontium Manganite Thin Films by Metal-Organic Chemical Liquid Deposition
DOI:10.1111/j.1551-2916.2011.04714.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Chen, Ying;Zhu, Junyu;Zhang, Shuai;Dong, Xianlin;Lei, Xiuyun;Tang, Xiaodong;Wang, Genshui;Jiang, J.;
7:4:76:3     Enhancement of the magnetoresistance and negative differential conductance of nanostructure arrays
DOI:10.1103/PhysRevB.83.020408  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Estevez, V.;Bascones, E.;
7:4:76:4     Observation of double exchange driven electroresistance of La0.67Ca0.33MnO3 thin film
DOI:10.1063/1.4820587  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Kambhala, Nagaiah;Viswanath, P.;Angappane, S.;
7:4:76:5     Low-Field Magnetoresistance Effect in Core-Shell Structured La0.7Sr0.3CoO3 Nanoparticles
DOI:10.1002/smll.201102070  JN:SMALL  PY:2012
  TC:4  AU: Wang, Yang;Fan, Hong Jin;
7:4:76:6     Robustness of the magnetoresistance of nanoparticle arrays
DOI:10.1103/PhysRevB.84.075441  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Estevez, V.;Bascones, E.;
7:4:76:7     Spin transport in ferromagnetic/normal-metal tunnel junction arrays
DOI:10.1103/PhysRevB.85.094421  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Johansson, J.;
7:4:76:8     Switching magnetoresistance in vertically interfaced Pr0.5Ca0.5MnO3 grown on ZnO nanowires
DOI:10.1063/1.3627182  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Mangalam, R. V. K.;Zhang, Z.;Wu, T.;Prellier, W.;
7:4:77:1     Thermally mediated multiferroic composites for the magnetoelectric materials
DOI:10.1063/1.3358133  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Lu, S. G.;Fang, Z.;Furman, E.;Wang, Y.;Zhang, Q. M.;Mudryk, Y.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Nan, C. W.;
7:4:77:2     Induced magneto-electric coupling in ferroelectric/ferromagnetic heterostructures
DOI:10.1063/1.4818455  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Carvell, Jeffrey;Cheng, Ruihua;Dowben, P. A.;Yang, Q.;
7:4:77:3     Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films
DOI:10.1063/1.3488814  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Mardana, A.;Bai, Mengjun;Baruth, A.;Ducharme, Stephen;Adenwalla, S.;
7:4:77:4     Induced magneto-electric coupling at ferroelectric/ferromagnetic interface
DOI:10.1063/1.4794873  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Carvell, Jeffrey;Cheng, Ruihua;Yang, Q.;
7:4:78:1     First-principles study of Fe/MgO based magnetic tunnel junctions with Mg interlayers
DOI:10.1103/PhysRevB.82.054405  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Wang, Yan;Zhang, Jia;Zhang, X. -G.;Cheng, Hai-Ping;Han, X. F.;
7:4:78:2     First-principles study of Co concentration and interfacial resonance states in Fe1-Co-x(x) magnetic tunnel junctions
DOI:10.1103/PhysRevB.88.104408  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Trinastic, J. P.;Wang, Yan;Cheng, Hai-Ping;
7:4:78:3     Tailoring tunnel magnetoresistance by ultrathin Cr and Co interlayers: A first-principles investigation of Fe/MgO/Fe junctions
DOI:10.1103/PhysRevB.82.014412  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Bose, Peter;Zahn, Peter;Henk, Juergen;Mertig, Ingrid;
7:4:78:4     Correlating transmission and local electronic structure in planar junctions: A tool for analyzing transport calculations
DOI:10.1103/PhysRevB.83.174451  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Bose, P.;Zahn, P.;Mertig, I.;Henk, J.;
7:4:78:5     Magnetic fluctuation and frustration in new iron-based layered SrFe1-xCoxAsF superconductors
DOI:10.1063/1.3448233  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Wang, W.;Li, B.;Liu, S.;Liu, M.;Xing, Z. W.;
7:4:79:1     Multiferroic Polymer Composites with Greatly Enhanced Magnetoelectric Effect under a Low Magnetic Bias
DOI:10.1002/adma.201101790  JN:ADVANCED MATERIALS  PY:2011
  TC:29  AU: Jin, Jiezhu;Lu, Sheng-Guo;Chanthad, Chalathorn;Zhang, Qiming;Hague, M. A.;Wang, Qing;
7:4:79:2     Multiferroic Polymer Laminate Composites Exhibiting High Magnetoelectric Response Induced by Hydrogen-Bonding Interactions
DOI:10.1002/adfm.201301675  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:4  AU: Jin, Jiezhu;Zhao, Fang;Han, Kuo;Haque, M. A.;Dong, Lijie;Wang, Qing;
7:4:79:3     Large magnetoelectric coupling coefficient in poly(vinylidene fluoride-hexafluoropropylene)/Metglas laminates
DOI:10.1063/1.3660767  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Lu, S. G.;Jin, J. Z.;Zhou, X.;Fang, Z.;Wang, Q.;Zhang, Q. M.;
7:4:79:4     The preparation and characterization of 1D multiferroic BFO/P(VDF-TrFE) composite nanofibers using electrospinning
DOI:10.1016/j.matlet.2014.05.118  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: You, Sujian;Liu, Chang;Liu, Huiqing;Yu, Xiaolei;Li, Shasha;Liu, Wei;Guo, Shishang;Zhao, Xingzhong;
7:4:80:1     High sensitivity low field magnetically gated resistive switching in CoFe2O4/La0.66Sr0.34MnO3 heterostructure
DOI:10.1063/1.4707373  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Thakare, Vishal;Xing, Guozhong;Peng, Haiyang;Rana, Abhimanyu;Game, Onkar;Kumar, P. Anil;Banpurkar, Arun;Kolekar, Yesappa;Ghosh, Kartik;Wu, Tom;Sarma, D. D.;Ogale, Satishchandra B.;
7:4:80:2     Nanoscale modulation of electronic states across unit cell steps on the surface of an epitaxial colossal magnetoresistance manganite film
DOI:10.1063/1.3455886  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Rana, Abhimanyu;Bogle, Kashinath;Game, Onkar;Patil, Shankar;Valanoor, Nagarajan;Ogale, Satishchandra;
7:4:80:3     Effect of "dipolar-biasing" on the tunability of tunneling magnetoresistance in transition metal oxide systems
DOI:10.1063/1.4731206  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Kumar, P. Anil;Sarma, D. D.;
7:4:80:4     Engineered spin-valve type magnetoresistance in Fe3O4-CoFe2O4 core-shell nanoparticles
DOI:10.1063/1.4819956  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Kumar, P. Anil;Ray, Sugata;Chakraverty, S.;Sarma, D. D.;
7:4:80:5     Giant enhancement of magnetoresistance in core-shell ferromagnetic-charge ordered nanostructures
DOI:10.1063/1.4830376  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Das, Kalipada;Rawat, R.;Satpati, B.;Das, I.;
7:4:80:6     In-situ stoichiometry determination using x-ray fluorescence generated by reflection-high-energy-electron-diffraction
DOI:10.1063/1.3592219  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Keenan, Cameron;Chandril, Sandeep;Myers, T. H.;Lederman, David;
7:4:81:1     Magnetoelectric coupling in sol-gel synthesized dilute magnetostrictive-piezoelectric composite thin films
DOI:10.1063/1.3610795  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Roy, Subhasis;Chatterjee, Ratnamala;Majumder, S. B.;
7:4:81:2     Electromechanical resonance in ferrite-piezoelectric nanopillars, nanowires, nanobilayers, and magnetoelectric interactions
DOI:10.1063/1.3359717  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Petrov, V. M.;Bichurin, M. I.;Srinivasan, G.;
7:4:81:3     Theory of magnetoelectric effect in laminate composites considering two-dimensional internal stresses and equivalent circuit
DOI:10.1063/1.3581104  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Bao, Binghao;Luo, Ying;
7:4:81:4     Optical characteristic of sol-gel synthesized lead lanthanum titanate-cobalt iron oxide multiferroic composite thin film
DOI:10.1063/1.4747918  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Roy, Subhasis;Majumder, S. B.;
7:4:82:1     Enhanced magnetization and conductive phase in NiFe2O4
DOI:10.1016/j.jmmm.2012.07.020  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:5  AU: Cheng, Ching;
7:4:82:2     Strongly reduced band gap in NiMn2O4 due to cation exchange
DOI:10.1016/j.jmmm.2014.01.048  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Huang, Jhih-Rong;Hsu, Han;Cheng, Ching;
7:4:82:3     Local electronic and magnetic structure of mixed ferrite multilayer materials
DOI:10.1103/PhysRevB.81.174422  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Wells, Daniel M.;Cheng, J.;Ellis, Donald E.;Wessels, B. W.;
7:4:82:4     Cation and magnetic orders in MnFe2O4 from density functional calculations
DOI:10.1063/1.4776771  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Huang, Jhih-Rong;Cheng, Ching;
7:4:83:1     Picosecond wide-field magneto-optical imaging of magnetization dynamics of amorphous film elements
DOI:10.1103/PhysRevB.90.054410  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Mozooni, Babak;von Hofe, Thomas;McCord, Jeffrey;
7:4:83:2     Ferromagnetic resonance, magnetic susceptibility, and transformation of domain structure in CoFeB film with growth induced anisotropy
DOI:10.1063/1.3559732  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Manuilov, S. A.;Grishin, A. M.;Munakata, M.;
7:4:83:3     Magnetization dynamics of buckling domain structures in patterned thin films
DOI:10.1103/PhysRevB.86.054426  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Patschureck, C.;Lenz, K.;Liedke, M. O.;Lutz, M. U.;Strache, T.;Moench, I.;Schaefer, R.;Schultz, L.;McCord, J.;
7:4:83:4     Low-field microwave absorption in epitaxial La0.7Sr0.3MnO3 films that results from the angle-tuned ferromagnetic resonance in the multidomain state
DOI:10.1103/PhysRevB.85.184418  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Golosovsky, M.;Monod, P.;Muduli, P. K.;Budhani, R. C.;
7:4:83:5     Magnetic Properties of Co-Fe-B Amorphous Films Thermomagnetically Treated with Different Field Directions
DOI:10.1155/2012/174735  JN:JOURNAL OF NANOMATERIALS  PY:2012
  TC:2  AU: Liu, Zhe;Li, Weili;Fei, Weidong;Xu, Dan;
7:4:83:6     Formation and coarsening of the concertina magnetization pattern in elongated thin-film elements
DOI:10.1103/PhysRevB.85.104407  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Steiner, Jutta;Schaefer, Rudolf;Wieczoreck, Holm;McCord, Jeffrey;Otto, Felix;
7:4:83:7     Magnetic domain compensation effect on the magnetodynamic response of ferromagnetic elements
DOI:10.1063/1.3474621  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:1  AU: Patschureck, C.;Kaltofen, R.;Moench, I.;Schaefer, R.;Schultz, L.;McCord, J.;
7:4:83:8     Vortex-antivortex creation and annihilation on CoFeB crosstie patterns
DOI:10.1063/1.3536342  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Gomez, R. D.;Ma, J. S.;Arkilic, A.;Chung, S. H.;Krafft, C.;
7:4:84:1     Effect of filler dispersion and dispersion method on the piezoelectric and magnetoelectric response of CoFe2O4/P(VDF-TrFE) nanocomposites
DOI:10.1016/j.apsusc.2014.05.187  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:7  AU: Martins, P.;Goncalves, R.;Lanceros-Mendez, S.;Lasheras, A.;Gutierrez, J.;Barandiaran, J. M.;
7:4:84:2     Magnetoelectric properties of CoFe2O4-Pb(Zr0.52Ti0.48)O-3 multilayered composite film via sol-gel method
DOI:10.1007/s10853-011-5381-3  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:4  AU: Shi, Min;Yu, Gui Yang;Su, Hai Lin;Zuo, Ru Zhong;Xu, Yu Dong;Wu, Guang;Wang, Li;
7:4:84:3     Post-curing effect on magnetoelectric performance of single PZT rod/continuous Terfenol-D fiber/epoxy 1-1-3 composites
DOI:10.1007/s10853-011-6123-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:3  AU: Lam, K. H.;Lo, C. Y.;Chan, H. L. W.;
7:4:84:4     Estimation of the magnetoelectric coefficient of a piezoelectric-magnetostrictive composite via finite element analysis
DOI:10.1063/1.4812222  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Sun, T. Y.;Sun, L.;Yong, Z. H.;Chan, H. L. W.;Wang, Y.;
7:4:84:5     Effect of filler dispersion and dispersion method on the piezoelectric and magnetoelectric response of CoFe2O4/P(VDF-TrFE) nanocomposites (vol 313, pg 215, 2014)
DOI:10.1016/j.apsusc.2014.07.089  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Martins, P.;Goncalves, R.;Lanceros-Mendez, S.;Lasheras, A.;Gutierrez, J.;Barandiaran, J. M.;
7:4:85:1     Magnetic and electrical transport properties of Pb1-xLaxTi1-xMnxO3 ceramics
DOI:10.1063/1.4749254  JN:AIP ADVANCES  PY:2012
  TC:2  AU: Xu, Jie;Wang, Jin-Feng;Jiao, Long;Ji, Weijing;Zhou, Jian;Gu, Zheng-Bin;Chen, Y. B.;Yao, Shu-Hua;Zhang, Shan-Tao;Chen, Yan-Feng;
7:4:85:2     Phase coexistence and magnetic anisotropy in polycrystalline and nanocrystalline LaMnO3+delta
DOI:10.1063/1.3551734  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Chandra, S.;Figueroa, A. I.;Ghosh, Barnali;Phan, M. H.;Srikanth, H.;Raychaudhuri, A. K.;
7:4:85:3     Room temperature long range ferromagnetic ordering in (BiFeO3)(1-x) (PbTiO3)(x) nanocrystallites
DOI:10.1063/1.3592281  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Singh, K.;Gautam, Ashish;Sen, K.;Kotnala, R. K.;Kumar, Mahesh;Gautam, P.;Singh, M.;
7:4:85:4     Weak ferromagnetic behavior of BiFeO3 at low temperature
DOI:10.1063/1.4801338  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Han, Seungkyu;Kim, Chul Sung;
7:4:86:1     Magnetization control for bit pattern formation of spinel ferromagnetic oxides by Kr ion implantation
DOI:10.1063/1.4868704  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Kita, Eiji;Suzuki, Kazuya Z.;Liu, Yang;Utsumi, Yuji;Morishita, Jumpei;Oshima, Daiki;Kato, Takeshi;Niizeki, Tomohiko;Mibu, Ko;Yanagihara, Hideto;
7:4:86:2     Effects of lateral straggling of ions on patterned media fabricated by nitrogen ion implantation
DOI:10.1063/1.3676427  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Hinoue, Tatsuya;Ito, Kenichi;Hirayama, Yoshiyuki;Hosoe, Yuzuru;
7:4:86:3     Magnetization suppression in Co/Pd and CoCrPt by nitrogen ion implantation for bit patterned media fabrication
DOI:10.1063/1.3431529  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Sato, Kenji;Ajan, Antony;Aoyama, Nobuhide;Tanaka, Tsutomu;Miyaguchi, Yusuke;Tsumagari, Kanako;Morita, Tadashi;Nishihashi, Tsutomu;Tanaka, Atsushi;Uzumaki, Takuya;
7:4:86:4     Magnetic properties and recording performances of patterned media fabricated by nitrogen ion implantation
DOI:10.1063/1.3556777  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Hinoue, Tatsuya;Ito, Kenichi;Hirayama, Yoshiyuki;Ono, Toshinori;Inaba, Hiroshi;
7:4:86:5     Extraordinarily large perpendicular magnetic anisotropy in epitaxially strained cobalt-ferrite CoxFe3-xO4(001) (x=0.75, 1.0) thin films (vol 103, 162407, 2013)
DOI:10.1063/1.4864102  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Niizeki, Tomohiko;Utsumi, Yuji;Aoyama, Ryohei;Yanagihara, Hideto;Inoue, Jun-ichiro;Yamasaki, Yuichi;Nakao, Hironori;Koike, Kazuyuki;Kita, Eiji;
7:4:86:6     Switching field distribution of planar-patterned CrPt3 nanodots fabricated by ion irradiation
DOI:10.1063/1.3565492  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Suharyadi, E.;Oshima, D.;Kato, T.;Iwata, S.;
7:4:87:1     Formation and characterization of three-ply structured multiferroic Sm0.88Nd0.12Fe1.93-Pb(Zr0.53Ti0.47)O-3 ceramic composites via a solid solution process
DOI:10.1016/j.jeurceramsoc.2011.03.032  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Zhang, Hongfang;Or, Siu Wing;Chan, Helen Lai Wa;Yang, Fang;
7:4:87:2     MgO Doping Effects on Dielectric Properties of Ba0.55Sr0.45TiO3 Ceramics
DOI:10.1111/j.1551-2916.2011.04577.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Zhang, Mingwei;Zhai, Jiwei;Shen, Bo;Yao, Xi;
7:4:87:3     Complex impedance and magnetoelectric effect analyses of a novel three-ply-structured (Tb0.3Dy0.7)(0.75)Pr0.25Fe1.55-Pb(Zr0.53Ti0.47)O-3 nanoceramic composites
DOI:10.1016/j.jallcom.2012.11.204  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Zhang, Hongfang;Mak, Chee-Leung;Zhang, Dongjie;Liu, Chengbao;
7:4:87:4     Multi-parameter magnetoelectric response modeling of magnetostrictive/piezoelectric laminate composites considering shear strain
DOI:10.1063/1.4860992  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Dai, Xianzhi;Zhang, Zhang;Wang, Yong;Li, Jianzhong;Chen, Lei;
7:4:87:5     Highly enhanced sinterability of fine-grained Ba0.6Sr0.4TiO3-MgO bulk ceramics and in-situ nanocomposite thick films
DOI:10.1016/j.ceramint.2014.03.018  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Zhang, Hongfang;Kong, Ling Bing;Mak, Chee-Leung;Kwok, Kin-Wing;Wang, Yu;Chan, Helen Lai-Wa;
7:4:87:6     Theoretical analyses on effective magnetoelectric coupling coefficients in piezoelectric/piezomagnetic laminates
DOI:10.1063/1.3559301  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Cui, Xiaoxi;Dong, Shuxiang;
7:4:88:1     Theoretical model for geometry-dependent magnetoelectric effect in magnetostrictive/piezoelectric composites
DOI:10.1063/1.4729832  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Wang, Yaojin;Hasanyan, Davresh;Li, Menghui;Gao, Junqi;Li, Jiefang;Viehland, D.;Luo, Haosu;
7:4:88:2     Influence of an interlayer bonding on the magnetoelectric effect in the layered magnetostrictive-piezoelectric structure
DOI:10.1007/s00339-014-8430-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:2  AU: Filippov, D. A.;Galichyan, T. A.;Laletin, V. M.;
7:4:88:3     Theoretical model for the magnetoelectric effect in magnetostrictive/piezoelectric composites
DOI:10.1103/PhysRevB.82.174415  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Osaretin, Idahosa A.;Rojas, Roberto G.;
7:4:88:4     Magnetoelectric effect in bilayer magnetostrictive-piezoelectric structure. Theory and experiment
DOI:10.1007/s00339-013-7957-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:4  AU: Filippov, D. A.;Galichyan, T. A.;Laletin, V. M.;
7:4:88:5     Time-harmonic dynamic Green's functions for two-dimensional functionally graded magnetoelectroelastic materials
DOI:10.1063/1.4862757  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Wang, Yi-Ze;Kuna, Meinhard;
7:4:89:1     Investigation of dielectric and electrical properties of Mn doped sodium potassium niobate ceramic system using impedance spectroscopy
DOI:10.1063/1.3660267  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Rani, Rashmi;Sharma, Seema;Rai, Radheshyam;Kholkin, Andrei L.;
7:4:89:2     Dielectric and magnetic studies of (NKNLS)(1-x)-(NZFO)(x) multiferroic composites
DOI:10.1016/j.jallcom.2014.06.051  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Rai, Radheshyam;Sharma, Seema;Rani, Rashmi;Pereira, Andre;Monteiro Almeida, Abilio de Jesus;
7:4:89:3     Advanced imaging techniques for characterization of 0.5BaTiO(3)/0.5Ni(0.5)Zn(0.5)Fe(2)O(4) multiferroic nanocomposite
DOI:10.1016/j.jallcom.2012.12.036  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Ahmed, M. A.;Okasha, N.;Imam, N. G.;
7:4:89:4     Enhancement in grain and grain boundary resistivity of BPZT ceramics by two stage sintering
DOI:10.1016/j.jallcom.2014.04.056  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Kumar, Parveen;Juneja, J. K.;Prakash, Chandra;Singh, Sangeeta;Raina, K. K.;
7:4:89:5     Modification of composite ceramics properties via different preparation techniques
DOI:10.1016/j.jmmm.2012.07.032  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:5  AU: Ahmed, M. A.;Okasha, N.;Imam, N. G.;
7:4:90:1     Influence of seed layer on crystal orientation and electrical properties of (Na0.85K0.15)(0.5)Bi0.5TiO3 thin films prepared by a sol-gel process
DOI:10.1016/j.ceramint.2013.05.035  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Chi, Q. G.;Yang, F. Y.;Zhang, C. H.;Chen, C. T.;Zhu, H. F.;Wang, X.;Lei, Q. Q.;
7:4:90:2     Structural, ferroelectric, and optical properties of Pb0.60Ca0.20Sr0.20TiO3, Pb0.50Ca0.25Sr0.25TiO3 and Pb0.40Ca0.30Sr0.30TiO3 thin films prepared by the chemical solution deposition technique
DOI:10.1016/j.ceramint.2014.05.052  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Pontes, D. S. L.;Pontes, F. M.;Capeli, R. A.;Garzim, M. L.;Chiquito, A. J.;Longo, E.;
7:4:90:3     Piezoelectric and dielectric aging of Bi-0.5(Na0.82K0.18)(0.5)TiO3 lead-free ferroelectric thick films
DOI:10.1063/1.3437637  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Zhang, Haibo;Jiang, Shenglin;Xiao, Jianzhong;Kajiyoshi, Koji;
7:4:90:4     Effect of Sc Doping on the Structure and Electrical Properties of (Na0.85K0.15)(0.5)Bi0.5TiO3 Thin Films Prepared by Sol-Gel Processing
DOI:10.1111/j.1551-2916.2011.04428.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Wu, Yunyi;Wang, Xiaohui;Li, Longtu;
7:4:90:5     Dielectric and optical properties of electroceramic PBZNZT thin films prepared by pulsed laser deposition process
DOI:10.1016/j.jeurceramsoc.2009.09.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:1  AU: Cheng, Hsiu-Fung;Chen, Yu-Wen;Joseph, P. T.;Hung, Chuan-Chic;Chiang, Horng-Yi;Lin, I-Nan;
7:4:91:1     A new aluminum-based metal matrix composite reinforced with cobalt ferrite magnetic nanoparticle
DOI:10.1007/s10853-012-6724-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:1  AU: Borgohain, Chandan;Acharyya, Kaustubh;Sarma, Sidananda;Senapati, Kula Kamal;Sarma, K. C.;Phukan, Prodeep;
7:4:91:2     Microstructural and mechanical characterization in 7075 aluminum alloy reinforced by silver nanoparticles dispersion
DOI:10.1016/j.jallcom.2009.10.209  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:3  AU: Flores-Campos, R.;Mendoza-Ruiz, D. C.;Amezaga-Madrid, P.;Estrada-Guel, I.;Miki-Yoshida, M.;Herrera-Ramirez, J. M.;Martinez-Sanchez, R.;
7:4:91:3     Synthesis of CoFe/Al2O3 composite nanoparticles as the impedance matching layer of wideband multilayer absorber
DOI:10.1063/1.3564939  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Zhen, L.;Gong, Y. X.;Jiang, J. T.;Xu, C. Y.;Shao, W. Z.;Liu, P.;Tang, J.;
7:4:91:4     Microstructure and mechanical properties of 7075 aluminum alloy nanostructured composites processed by mechanical milling and indirect hot extrusion
DOI:10.1016/j.matchar.2011.10.014  JN:MATERIALS CHARACTERIZATION  PY:2012
  TC:2  AU: Flores-Campos, R.;Estrada-Guel, I.;Miki-Yoshida, M.;Martinez-Sanchez, R.;Herrera-Ramirez, J. M.;
7:4:92:1     Spin-glass behavior and exchange bias in phase-separated Nd0.85Sr0.15CoO3
DOI:10.1016/j.jallcom.2011.01.105  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Mao, Jinhua;Sui, Yu;Wang, Xianjie;Yang, Yiyun;Zhang, Xingquan;Wang, Yang;Wang, Yi;Liu, Wanfa;
7:4:92:2     In situ dynamical control of the strain and magnetoresistance of La0.7Ca0.15Sr0.15MnO3 thin films using the magnetostriction of Terfenol-D alloy
DOI:10.1016/j.jallcom.2011.01.197  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:1  AU: Zheng, R. K.;Choy, S. H.;Wang, Y.;Chan, H. L. W.;Choy, C. L.;Luo, H. S.;
7:4:92:3     Epitaxial growth of La0.7Sr0.3CoO3 thin films on SrTiO3 substrates by metal-organic deposition
DOI:10.1016/j.jallcom.2010.07.035  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:4  AU: Daoudi, K.;Tsuchiya, T.;Nakajima, T.;Fouzri, A.;Oueslati, M.;
7:4:92:4     Structural, electrical and magnetic properties of epitaxial La0.7Sr0.3CoO3 thin films grown on SrTiO3 and LaAlO3 substrates
DOI:10.1016/j.apsusc.2014.03.034  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Othmen, Z.;Schulman, A.;Daoudi, K.;Boudard, M.;Acha, C.;Roussel, H.;Oueslati, M.;Tsuchiya, T.;
7:4:92:5     Spin glass-like behaviour in Fe-rich phases of Sr2Fe1-xMnxMoO6 (0.1 <= x <= 0.4)
DOI:10.1016/j.jallcom.2010.04.122  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:1  AU: Poddar, Asok;Mazumdar, Chandan;
7:4:93:1     Increasing solvent polarity and addition of salts promote beta-phase poly(vinylidene fluoride) formation
DOI:10.1002/app.38451  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2013
  TC:1  AU: Low, Yuen Kei Adarina;Tan, Li Yi;Tan, Lay Poh;Boey, Freddy Yin Chiang;Ng, Kee Woei;
7:4:93:2     Piezoelectric Membrane Based Biosensor Platform
DOI:10.1080/00150193.2010.485950  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Lu, Xu;Li, Shaokang;Xu, Zhuo;Ren, Wei;Cheng, Zhongyang;
7:4:93:3     Ferroelectric Thin Film Diaphragm Resonators for Bio-Detection
DOI:10.1080/00150193.2010.492743  JN:FERROELECTRICS  PY:2011
  TC:5  AU: Li, Shaokang;Ren, Wei;Lu, Xu;Xu, Zhuo;Cheng, Zhongyang;Chen, Xiaofeng;Shi, Peng;Wu, Xiaoqing;Yao, Xi;
7:4:93:4     Resonance Behavior of Piezoelectric Polymer Diaphragms for Biosensors
DOI:10.1080/00150193.2013.837761  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Li, Xiaomeng;Zhao, Bei;Li, Shaokang;Wu, Xiaoqing;Ren, Wei;Shi, Peng;Ye, Zuoguang;
7:4:93:5     Residual stress in piezoelectric poly(vinylidene-fluoride-co-trifluoroethylene) thin films deposited on silicon substrates
DOI:10.1016/j.tsf.2010.09.042  JN:THIN SOLID FILMS  PY:2010
  TC:4  AU: Oh, Sharon Roslyn;Yao, Kui;Chow, Choi Lan;Tay, Francis Eng Hock;
7:4:93:6     A Series Piezoelectric Diaphragm Resonator for Biosensor Applications
DOI:10.1080/10584587.2012.741929  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Li, Shaokang;Ren, Wei;Wu, Xiaoqing;Shi, Peng;Chen, Xiaofeng;Tian, Aifen;Ye, Zuo-Guang;
7:4:94:1     Polarization rotation and phase transition in [100]-oriented PZN-PT single crystals determined by the electro-crystalline anisotropy
DOI:10.1063/1.4829911  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Zhang, Hui;
7:4:94:2     A theory for structural phase transitions in BaTiO3 single crystal and PbZrO3 -xPbTiO(3) solid solution
DOI:10.1063/1.4802874  JN:AIP ADVANCES  PY:2013
  TC:3  AU: Zhang, Hui;
7:4:94:3     Effect of the compressive stress on both polarization rotation and phase transitions in PMN-30%PT single crystal
DOI:10.1063/1.4879518  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Zhang, Hui;
7:4:94:4     Polarization rotation and field induced phase transition in PZN-4.5% PT single crystal
DOI:10.1063/1.4819763  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Zhang, Hui;
7:4:95:1     Electroresistance and current-induced metastable states in the thin film of half-doped manganite Pr0.5Sr0.5MnO3
DOI:10.1063/1.4800841  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Wang, J. F.;Chen, L. P.;Jiang, Y. C.;Gao, J.;
7:4:95:2     Large photoinduced conductivity reduction in thin films of metallic ferromagnetic manganites
DOI:10.1063/1.3665039  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Smolyaninova, V. N.;Yong, G.;Kolagani, Rajeswari M.;Biswas, Amlan;Ermer, H. K.;Wang, K.;Piazza, A.;
7:4:95:3     Magneto- and electro-resistance effects in phase separated Pr-0.55(Ca0.65S0.35)(0.45)MnO3 films
DOI:10.1063/1.3656456  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Kumar, Ashvani;Dho, Joonghoe;
7:4:95:4     Electroresistance and field effects in epitaxial thin films of Pr0.7Sr0.3MnO3
DOI:10.1007/s00339-010-5920-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:1  AU: Gao, J.;Liu, H. Y.;
7:4:95:5     Influence of epitaxial growth on phase competition in Pr0.5Sr0.5MnO3 films
DOI:10.1016/j.jmmm.2011.11.006  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Chen, Liping;Chen, Yuansha;Ma, Yubin;Lian, Guijun;Zhang, Yan;Xiong, Guangcheng;
7:4:96:1     A-site disorder driven sharp field-induced transition and collapse of charge ordering in Sm1/2Ca1/2-xSrxMnO3
DOI:10.1063/1.4755802  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Sabyasachi, Sk.;Karmakar, A.;Majumdar, S.;Giri, S.;Das, S.;Amaral, V. S.;
7:4:96:2     Pressure effects on the magnetic structure in La0.5Ca0.5-xSrxMnO3 (0.1 < x < 0.4) manganites
DOI:10.1103/PhysRevB.81.104424  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Dhiman, Indu;Straessle, Thierry;Keller, L.;Padmanabhan, B.;Das, A.;
7:4:96:3     Effect of B-site doping in (La0.3Pr0.7)(0.65)Ca0.35Mn1-xBxO3 (B=Fe, Cr, Ru and Al) manganites
DOI:10.1016/j.jmmm.2013.01.012  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Dhiman, Indu;Das, A.;Nigam, A. K.;Kremer, R. K.;
7:4:96:4     Magnetic phase separation in Nd(0.5)(Ca, Sr)(0.5)MnO(3)
DOI:10.1063/1.3475503  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Kumary, T. Geetha;Lin, J. G.;Valsakumar, M. C.;
7:4:97:1     Magnetoelectric coupling in antiferroelectric and magnetic laminate composites
DOI:10.1007/s00339-011-6261-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:1  AU: Zhou, Jian-Ping;Chen, Xian-Zhi;Lv, Li;Liu, Cheng;Liu, Peng;
7:4:97:2     Direct and converse magnetoelectric effects in Ni43Mn41Co5Sn11/Pb(Zr,Ti)O-3 laminate
DOI:10.1063/1.3360348  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Chen, S. Y.;Ye, Q. Y.;Miao, W.;Wang, D. H.;Wan, J. G.;Liu, J. -M.;Du, Y. W.;Huang, Z. G.;Zhou, S. Q.;
7:4:97:3     Inductance-capacitance resonance effect in the magnetoelectric composites characterization system
DOI:10.1007/s00339-010-5740-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:2  AU: Pan, D. A.;Wang, X. F.;Tian, J. J.;Zhang, S. G.;Volinsky, A. A.;Qiao, L. J.;
7:4:98:1     Evolution of ferromagnetic clustering in Pr0.5Ca0.5MnO3 and its effect on the critical temperature of YBa2Cu3O7 thin film
DOI:10.1063/1.4725422  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Baisnab, Dipak Kumar;Kumary, T. Geetha;Satya, A. T.;Mani, Awadhesh;Nithya, R.;Vaidhyanathan, L. S.;Janawadkar, M. P.;Bharathi, A.;
7:4:98:2     Intricacies of strain and magnetic field induced charge order melting in Pr0.5Ca0.5MnO3 thin films
DOI:10.1016/j.jmmm.2011.06.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:8  AU: Baisnab, Dipak Kumar;Kumary, T. Geetha;Satya, A. T.;Mani, Awadhesh;Janaki, J.;Nithya, R.;Vaidhyanathan, L. S.;Janawadkar, M. P.;Bharathi, A.;
7:4:98:3     The effects of strain, current, and magnetic field on superconductivity in Pr0.5Ca0.5MnO3/YBa2Cu3O7/Pr0.5Ca0.5MnO3 trilayer
DOI:10.1063/1.4795349  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Baisnab, Dipak Kumar;Janawadkar, M. P.;Sharma, Shilpam;Sarguna, R. M.;Vaidhyanathan, L. S.;Bharathi, A.;
7:4:98:4     Effect of current induced charge-order melting of Pr0.5Ca0.5MnO3 in partially masked superconducting Pr0.5Ca0.5MnO3/YBa2Cu3O7 bilayer
DOI:10.1063/1.4848103  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Baisnab, Dipak Kumar;Janawadkar, M. P.;Vaidhyanathan, L. S.;Bharathi, A.;
7:4:99:1     Valence band offset of ZnO/BaTiO3 heterojunction measured by X-ray photoelectron spectroscopy
DOI:10.1007/s00339-010-5599-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:11  AU: Jia, C. H.;Chen, Y. H.;Zhou, X. L.;Yang, A. L.;Zheng, G. L.;Liu, X. L.;Yang, S. Y.;Wang, Z. G.;
7:4:99:2     Surface potential of BaTiO3 single crystal near the Curie temperature
DOI:10.1103/PhysRevB.83.115407  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Makhova, L.;Hesse, R.;Ullrich, M.;Denecke, R.;Konovalov, I.;
7:4:99:3     Influence of the Polarization and the Temperature on the Surface Potential and the Band Diagram in ZnO/BaTiO3 Heterostructure
DOI:10.1080/00150193.2012.676922  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Makhova, L.;Konovalov, I.;
7:4:100:1     Effect of Sintering Temperature on Piezoelectric and Ferroelectric Properties of Lead-Free Piezoelectric Ta-modified (K0.5Na0.5)NbO3 Ceramics
DOI:10.1080/00150193.2012.740292  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Cheng, Chien-Min;Chen, Kai-Huang;Yang, Fann-Wei;
7:4:100:2     DC magnetic field sensor based on electric driving and magnetic tuning in piezoelectric/magnetostrictive bilayer
DOI:10.1063/1.4866516  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Zhang, Long;Or, Siu Wing;Leung, Chung Ming;Ho, S. L.;
7:4:100:3     dc magnetoelectric sensor based on direct coupling of Lorentz force effect in aluminum strip with transverse piezoelectric effect in 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) single-crystal plate
DOI:10.1063/1.3337748  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Leung, Chung Ming;Or, Siu Wing;Ho, Siu Lau;
7:4:100:4     Piezoelectric-metal-magnet dc magnetoelectric sensor with high dynamic response
DOI:10.1063/1.4812225  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Zhang, Long;Leung, Chung Ming;Or, Siu Wing;Ho, S. L.;
7:4:101:1     Ab initio studies of pristine and oxidized Cu3Au(100) and (111) surfaces
DOI:10.1007/s10853-012-6468-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:4  AU: Leitao, Alexandre A.;Dionizio Moreira, M.;Dias, L. G.;Silva, Alexander M.;Capaz, Rodrigo B.;Achete, C. A.;
7:4:101:2     Impact of ambient oxygen on the surface structure of alpha-Cr2O3(0001)
DOI:10.1103/PhysRevB.81.205439  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Bikondoa, O.;Moritz, W.;Torrelles, X.;Kim, H. J.;Thornton, G.;Lindsay, R.;
7:4:101:3     V2O3(0001) Surface Termination: Phase Equilibrium
DOI:10.1103/PhysRevLett.107.016105  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:8  AU: Window, A. J.;Hentz, A.;Sheppard, D. C.;Parkinson, G. S.;Niehus, H.;Ahlbehrendt, D.;Noakes, T. C. Q.;Bailey, P.;Woodruff, D. P.;
7:4:101:4     Signatures of oxygen on Cu3Au(100): From isolated impurity to oxide regimes
DOI:10.1103/PhysRevB.82.045408  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Leitao, Alexandre A.;Dias, L. G.;Dionizio Moreira, M.;Stavale, F.;Niehus, H.;Achete, C. A.;Capaz, Rodrigo B.;
7:4:102:1     Enhanced ferroelectric properties of 0.95Pb(Sc0.5Ta0.5)O-3-0.05PbTiO(3) thin films with Pb(Zr-0.52,Ti-0.48)O-3 seed layer
DOI:10.1016/j.ceramint.2011.04.090  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Pu, Yunti;Zhu, Jiliang;Zhu, Xiaohong;Luo, Yuansheng;Li, Xuedong;Wang, Mingsong;Liu, Jing;Li, Xuhai;Zhu, Jianguo;Xiao, Dingquan;
7:4:102:2     Dielectric and ferroelectric properties of (100)-oriented 0.9Pb(Sc0.5Ta0.5)O-3-0.1%PbTiO3/0.55Pb(Sc0.5Ta0.5)O-3-0.45%PbTiO3 heterostructures
DOI:10.1016/j.apsusc.2014.06.149  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Li, Xuedong;Liu, Hong;Liu, Gang;Xiao, Dingquan;Zhu, Jianguo;
7:4:102:3     Effect of different annealing methods on ferroelectric properties of 0.95Pb(Sc0.5Ta0.5)O-3-0.05PbTiO(3) thin films
DOI:10.1016/j.apsusc.2011.02.120  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:6  AU: Li, Xuedong;Guo, Hongli;Liu, Hong;Xiao, Dingquan;Zhu, Jianguo;
7:4:103:1     Magnetoelectric properties of laminated La0.7Ba0.3MnO3-BaTiO3 ceramic composites
DOI:10.1016/j.jmmm.2014.04.014  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Clabel, J. L. H.;Zabotto, F. L.;Nogueira, I. C.;Schio, P.;Garcia, D.;de Lima, O. F.;Leite, E. R.;Moreira, F. M. A.;Cardoso, C. A.;
7:4:103:2     Improved crystallinity, spatial arrangement and monodispersity of submicron La0.7Ba0.3MnO3 powders: A citrate chelation approach
DOI:10.1016/j.jmmm.2012.06.007  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Rao, Ch. N.;Samatham, S. Shanmukharao;Ganesan, V.;Sathe, V. G.;Phase, D. M.;Kale, S. N.;
7:4:103:3     Temperature dependence of Raman scattering in AlInN
DOI:10.1063/1.3594697  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Jiang, L. F.;Kong, J. F.;Shen, W. Z.;Guo, Q. X.;
7:4:104:1     Response to "Comment on 'Fundamental limits of energy dissipation in charge-based computing' " [Appl. Phys. Lett. 98, 096101, (2011)]
DOI:10.1063/1.3560059  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Boechler, G. P.;Whitney, J. M.;Lent, C. S.;Orlov, A. O.;Snider, G. L.;
7:4:104:2     Fundamental limits of energy dissipation in charge-based computing
DOI:10.1063/1.3484959  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Boechler, Graham P.;Whitney, Jean M.;Lent, Craig S.;Orlov, Alexei O.;Snider, Gregory L.;
7:4:104:3     Comment on "Fundamental limits of energy dissipation in charge-based computing" [Appl. Phys. Lett. 97, 103502, (2010)]
DOI:10.1063/1.3560058  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Zhirnov, V. V.;Cavin, R. K.;
7:4:104:4     A multiscale simulation technique for molecular electronics: design of a directed self-assembled molecular n-bit shift register memory device
DOI:10.1088/0957-4484/24/50/505202  JN:NANOTECHNOLOGY  PY:2013
  TC:0  AU: Lambropoulos, Nicholas A.;Reimers, Jeffrey R.;Crossley, Maxwell J.;Hush, Noel S.;Silverbrook, Kia;
7:4:105:1     Density functional theory investigation of site predilection of Fe substitution in barium titanate
DOI:10.1016/j.ceramint.2012.10.080  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Nimmanpipug, Piyarat;Saelor, Aroon;Srisombat, Laongnuan;Lee, Vannajan Sanghiran;Laosiritaworn, Yongyut;
7:4:105:2     Rebuttal to "density functional theory investigation of site prediction of Fe substitution in barium titanate"
DOI:10.1016/j.ceramint.2014.07.078  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Nimmanpipug, Piyarat;Srisombat, Laongnaun;Saelor, Aroon;Lee, Vannajan Sanghiran;Pramchu, Sittichain;Laosiritaworn, Yongyut;
7:4:105:3     Investigation of A- and B-site Fe substituted BaTiO3 ceramics
DOI:10.1063/1.4796193  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Maikhuri, Neelam;Panwar, Amrish K.;Jha, A. K.;
7:4:105:4     Comment on "Density functional theory investigation of site predilection of Fe substitution in barium titanate"
DOI:10.1016/j.ceramint.2014.07.079  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Melendez, Juan J.;
7:4:106:1     A study on the glass-crystal transformation under non-isothermal regime: Evaluation of the crystallization kinetics of the Ag0.24As0.30Se0.46 glassy semiconductor by using the theoretical method developed (TMD) and a model-fitting approach
DOI:10.1016/j.jallcom.2012.07.139  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Cardenas-Leal, J. L.;Vazquez, J.;Barreda, D. Garcia-G;Lopez-Alemany, P. L.;Gonzalez-Palma, R.;Villares, P.;
7:4:106:2     An extension to isothermal processes of the theoretical method developed (TMD) to analyze the glass-crystal transformation kinetics by differential scanning calorimetry. Application to the crystallization of the Sb0.16As0.22Se0.62 glassy alloy
DOI:10.1016/j.jallcom.2013.07.166  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Cardenas-Leal, J. L.;Vazquez, J.;Barreda, D. Garcia-G.;Lopez-Alemany, P. L.;Gonzalez-Palma, R.;Villares, P.;
7:4:106:3     An integral method to analyze the glass-crystal transformation kinetics by differential scanning calorimetry under non-isothermal regime. Application to the crystallization of the Ge0.08Sb0.15Se0.77 chalcogenide glass
DOI:10.1007/s10853-011-5465-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:3  AU: Vazquez, J.;Cardenas-Leal, J. L.;Gonzalez-Palma, R.;Barreda, D. Garcia-G.;Lopez-Alemany, P. L.;Villares, P.;
7:4:107:1     A New Approach of Polyvinylidene Fluoride (PVDF) Poling Method for Higher Electric Response
DOI:10.1080/00150193.2013.820983  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Ting, Yung;Gunawan, Hariyanto;Sugondo, Amelia;Chiu, Chun-Wei;
7:4:107:2     A new poling method for piezoelectric ceramics with thick film
DOI:10.1016/j.jeurceramsoc.2014.01.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Ting, Yung;Gunawan, Hariyanto;Zhong, Jain-Zhi;Chiu, Chun-Wei;
7:4:107:3     A New Approach for Surface Poling of Polyvinylidene Fluoride (PVDF)
DOI:10.1080/00150193.2013.820978  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Ting, Yung;Gunawan, Hariyanto;Chiu, Chun-Wei;Zhong, Jain-Zhi;
7:4:108:1     Multiferroic properties of CoFe2O4/Bi3.4La0.6Ti3O12 bilayer structure at room temperature
DOI:10.1063/1.4815966  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Charris-Hernandez, A.;Melgarejo, R.;Barrionuevo, D.;Kumar, A.;Tomar, M. S.;
7:4:108:2     Multiferroic Properties of Bi4-xNdxTi3O12/CoFe2O4 Composite Films
DOI:10.1080/10584587.2011.573717  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:1  AU: Barrionuevo, D.;Singh, S. P.;Tomar, M. S.;
7:4:108:3     Structural and Multiferroic Properties of Bi3.4La0.6Ti3O12/CoFe2O4 Composite Thin Films
DOI:10.1080/10584587.2014.912081  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Tomar, M. S.;Charris-Hernandez, A.;Barrionuevo, D.;Kumar, A.;
7:4:109:1     Understanding nanoparticle self-assembly for a strong improvement in functionality in thin film nanocomposites
DOI:10.1088/0957-4484/21/9/095604  JN:NANOTECHNOLOGY  PY:2010
  TC:11  AU: Harrington, S. A.;Durrell, J. H.;Wang, H.;Wimbush, S. C.;Tsai, C. F.;MacManus-Driscoll, J. L.;
7:4:109:2     Surface texture and interior residual stress variation induced by thickness of YBa2Cu3O7-delta thin films
DOI:10.1063/1.4750037  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Zeng, L.;Lu, Y. M.;Liu, Z. Y.;Chen, C. Z.;Gao, B.;Cai, C. B.;
7:4:109:3     Strong correlated pinning at high growth rates in YBa2Cu3O7-x thin films with Ba2YNbO6 additions
DOI:10.1063/1.4890459  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ercolano, G.;Bianchetti, M.;Sahonta, S. -L.;Kursumovic, A.;Lee, J. H.;Wang, H.;MacManus-Driscoll, J. L.;
7:4:110:1     Voltage tunable photodetecting properties of La0.4Ca0.6MnO3 films grown on miscut LaSrAlO4 substrates
DOI:10.1063/1.3473781  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Li, X. M.;Zhao, K.;Ni, H.;Zhao, S. Q.;Xiang, W. F.;Lu, Z. Q.;Yue, Z. J.;Wang, F.;Kong, Yu-Chau;Wong, H. K.;
7:4:110:2     MSM Ultraviolet Detectors Based on Zr0.1Ti0.9O2 Solid Solution
DOI:10.1080/10584587.2012.688471  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Li, Yunfei;Wang, Sida;Guan, Yingzhou;Feng, Jia;Zhang, Haifeng;Ruan, Shengping;Chen, Lihua;Liu, Kuixue;Liu, Caixia;Zhou, Jingran;
7:4:111:1     Lead free heterogeneous multilayers with giant magneto electric coupling for microelectronics/microelectromechanical systems applications
DOI:10.1063/1.4818411  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Nair, Swapna S.;Pookat, Geetha;Saravanan, Venkata;Anantharaman, M. R.;
7:4:111:2     Giant magnetostriction in magnetite nanoparticles
DOI:10.1016/j.mseb.2011.09.023  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:2  AU: Balaji, G.;Narayanan, R. Aravinda;Weber, A.;Mohammad, F.;Kumar, C. S. S. R.;
7:4:112:1     Suppression of ferromagnetism and metal-like conductivity in lightly Fe-doped SrRuO3
DOI:10.1063/1.3624764  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Fan, Jiyu;Liao, Sicheng;Wang, Wenqin;Zhang, Lei;Tong, Wei;Ling, Langsheng;Hong, Bo;Shi, Yangguang;Zhu, Yan;Hu, Dazhi;Pi, Li;Zhang, Yuheng;
7:4:112:2     Interrelatedness of Fe composition on structural and magnetic properties in Fe-doped SrRuO3 thin films
DOI:10.1007/s00339-013-7888-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Yoo, Y. Z.;Chmaissem, O.;Kolesnik, S.;Brown, D. E.;Dabrowski, B.;Kimball, C. W.;Kim, T. -W.;Kim, M. -S.;Genis, A. P.;Song, J. -H.;
7:4:113:1     Magnetoelectric Properties of Two-Layered Composites Tb0.12Dy0.2Fe0.68 - PbZr0.53Ti0.47O3
DOI:10.1080/00150193.2013.785907  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Kalgin, A. V.;Gridnev, S. A.;Gribe, Z. H.;
7:4:113:2     Magnetic and Magnetoelectric Properties of Particulate (x)PbZr0.53Ti0.47O3-(1-x) Mn0.4Zn0.6Fe2O4 Composites
DOI:10.1080/00150193.2010.484775  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Gridnev, S. A.;Kalgin, A. V.;Amirov, A. A.;Kamilov, I. K.;
7:4:114:1     Ferromagnetic resonance and magnetoelastic demodulation in thin active films with an uniaxial anisotropy
DOI:10.1063/1.3382911  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Klimov, A.;Ignatov, Yu.;Tiercelin, N.;Preobrazhensky, V.;Pernod, P.;Nikitov, S.;
7:4:114:2     Patterned L1(0)-FePt for polarization of magnetic films
DOI:10.1063/1.3561172  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Dusch, Yannick;Tiercelin, Nicolas;Klimov, Alexey;Rudenko, Vasyl;Ignatov, Yury;Hage-Ali, Sami;Pernod, Philippe;Preobrazhensky, Vladimir;
7:4:115:1     Persistent photoconductivity induced by electric currents in epitaxial thin films of Pr0.7Sr0.3MnO3
DOI:10.1063/1.3536458  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Wang, J. F.;Gao, J.;
7:4:115:2     Electric currents induced step-like resistive jumps and negative differential resistance in thin films of Nd0.7Sr0.3MnO3
DOI:10.1063/1.3675998  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Wang, J. F.;Wu, Z. P.;Gao, J.;
7:4:116:1     Influence of pressure-assisted polymerization on the microstructure and strength of polymer-infiltrated ceramics
DOI:10.1007/s10853-012-7106-7  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:4  AU: Steier, Volker Franco;Koplin, Christof;Kailer, Andreas;
7:4:116:2     Machinability of poly(methyl methacrylate) infiltrated zirconia hybrid composites
DOI:10.1016/j.matlet.2014.06.021  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Li, Shibao;Zhao, Yimin;Zhang, Jian-Feng;Xie, Cheng;Zhao, Xinyi;
7:5:1:1     Low-field magnetoelectric effect at room temperature
DOI:10.1038/nmat2826  JN:NATURE MATERIALS  PY:2010
  TC:157  AU: Kitagawa, Yutaro;Hiraoka, Yuji;Honda, Takashi;Ishikura, Taishi;Nakamura, Hiroyuki;Kimura, Tsuyoshi;
7:5:1:2     Realization of Giant Magnetoelectricity in Helimagnets
DOI:10.1103/PhysRevLett.104.037204  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:48  AU: Chun, Sae Hwan;Chai, Yi Sheng;Oh, Yoon Seok;Jaiswal-Nagar, Deepshikha;Haam, So Young;Kim, Ingyu;Lee, Bumsung;Nam, Dong Hak;Ko, Kyung-Tae;Park, Jae-Hoon;Chung, Jae-Ho;Kim, Kee Hoon;
7:5:1:3     Multiferroic M-Type Hexaferrites with a Room-Temperature Conical State and Magnetically Controllable Spin Helicity
DOI:10.1103/PhysRevLett.105.257201  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:44  AU: Tokunaga, Y.;Kaneko, Y.;Okuyama, D.;Ishiwata, S.;Arima, T.;Wakimoto, S.;Kakurai, K.;Taguchi, Y.;Tokura, Y.;
7:5:1:4     Magnetic Ordering in Relation to the Room-Temperature Magnetoelectric Effect of Sr3Co2Fe24O41
DOI:10.1103/PhysRevLett.106.087201  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:32  AU: Soda, Minoru;Ishikura, Taishi;Nakamura, Hiroyuki;Wakabayashi, Yusuke;Kimura, Tsuyoshi;
7:5:1:5     Electric Field Control of Nonvolatile Four-State Magnetization at Room Temperature
DOI:10.1103/PhysRevLett.108.177201  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:27  AU: Chun, Sae Hwan;Chai, Yi Sheng;Jeon, Byung-Gu;Kim, Hyung Joon;Oh, Yoon Seok;Kim, Ingyu;Kim, Hanbit;Jeon, Byeong Jo;Haam, So Young;Park, Ju-Young;Lee, Suk Ho;Chung, Jae-Ho;Park, Jae-Hoon;Kim, Kee Hoon;
7:5:1:6     Magnetism and magnetoelectricity of a U-type hexaferrite Sr4Co2Fe36O60
DOI:10.1063/1.3593371  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:21  AU: Okumura, K.;Ishikura, T.;Soda, M.;Asaka, T.;Nakamura, H.;Wakabayashi, Y.;Kimura, T.;
7:5:1:7     Neutron diffraction studies on the multiferroic conical magnet Ba2Mg2Fe12O22
DOI:10.1103/PhysRevB.81.174418  JN:PHYSICAL REVIEW B  PY:2010
  TC:23  AU: Ishiwata, Shintaro;Okuyama, Daisuke;Kakurai, Kazuhisa;Nishi, Masakazu;Taguchi, Yasujiro;Tokura, Yoshinori;
7:5:1:8     Field-induced incommensurate-to-commensurate phase transition in the magnetoelectric hexaferrite Ba0.5Sr1.5Zn2(Fe1-xAlx)(12)O-22
DOI:10.1103/PhysRevB.83.144425  JN:PHYSICAL REVIEW B  PY:2011
  TC:18  AU: Lee, Hak Bong;Song, Young-Sang;Chung, Jae-Ho;Chun, Sae Hwan;Chai, Yi Sheng;Kim, Kee Hoon;Reehuis, M.;Prokes, K.;Mat'as, S.;
7:5:1:9     Converse magnetoelectric experiments on a room-temperature spirally ordered hexaferrite
DOI:10.1103/PhysRevB.86.024430  JN:PHYSICAL REVIEW B  PY:2012
  TC:14  AU: Ebnabbasi, Khabat;Vittoria, Carmine;Widom, Allan;
7:5:1:10     Magnetocaloric effect in multiferroic Y-type hexaferrite Ba0.5Sr1.5Zn2(Fe0.92Al0.08)(12)O-22
DOI:10.1063/1.4883235  JN:AIP ADVANCES  PY:2014
  TC:2  AU: Xu, Wenfei;Yang, Jing;Shen, Yude;Bai, Wei;Zhang, Yuanyuan;Liu, Jia;Tang, Kai;Wang, Zhi;Duan, Chun-Gang;Tang, Xiaodong;Chu, Junhao;
7:5:1:11     Synthesis and room temperature four-state memory prototype of Sr3Co2Fe24O41 multiferroics
DOI:10.1063/1.4753973  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Wu, Jiangtao;Shi, Zhan;Xu, Jun;Li, Nan;Zheng, Zhibin;Geng, Hao;Xie, Zhaoxiong;Zheng, Lansun;
7:5:1:12     Heliconical magnetic order and field-induced multiferroicity of the Co2Y-type hexaferrite Ba0.3Sr1.7Co2Fe12O22
DOI:10.1103/PhysRevB.86.094435  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Lee, Hak Bong;Chun, Sae Hwan;Shin, Kwang Woo;Jeon, Byung-Gu;Chai, Yi Sheng;Kim, Kee Hoon;Schefer, Juerg;Chang, Hun;Yun, Sae-Na;Joung, Tae-Young;Chung, Jae-Ho;
7:5:1:13     Magnetoelectric effects at microwave frequencies on Z-type hexaferrite
DOI:10.1063/1.4744591  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Ebnabbasi, Khabat;Mohebbi, Marjan;Vittoria, Carmine;
7:5:1:14     Low magnetic field reversal of electric polarization in a Y-type hexaferrite
DOI:10.1063/1.3697636  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:12  AU: Wang, Fen;Zou, Tao;Yan, Li-Qin;Liu, Yi;Sun, Young;
7:5:1:15     Magnetic field reversal of electric polarization and magnetoelectric phase diagram of the hexaferrite Ba1.3Sr0.7Co0.9Zn1.1Fe10.8Al1.2O22
DOI:10.1063/1.4862690  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:4  AU: Shen, Shipeng;Yan, Liqin;Chai, Yisheng;Cong, Junzhuang;Sun, Young;
7:5:1:16     Magnetoelectric effect in PbCoTiFe10O19 multiferroic ceramic
DOI:10.1016/j.ceramint.2014.07.097  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Zhou, W. P.;Wang, L. Y.;Song, Y. Q.;Fang, Y.;Wang, D. H.;Cao, Q. Q.;Du, Y. W.;
7:5:1:17     Spin reorientation transition and near room-temperature multiferroic properties in a W-type hexaferrite SrZn1.15Co0.85Fe16O27
DOI:10.1063/1.4867370  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Song, Y. Q.;Fang, Y.;Wang, L. Y.;Zhou, W. P.;Cao, Q. Q.;Wang, D. H.;Du, Y. W.;
7:5:1:18     Mutual control of magnetization and electrical polarization by electric and magnetic fields at room temperature in Y-type BaSrCo2-xZnxFe11AlO22 ceramics
DOI:10.1063/1.4862432  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Hirose, Sakyo;Haruki, Kohei;Ando, Akira;Kimura, Tsuyoshi;
7:5:1:19     Magnetic and magnetoelectric properties of Ba2-xSrxNi2Fe12O22 single crystals with Y-type hexaferrite structure
DOI:10.1063/1.3622332  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:18  AU: Hiraoka, Yuji;Nakamura, Hiroyuki;Soda, Minoru;Wakabayashi, Yusuke;Kimura, Tsuyoshi;
7:5:1:20     Al doping effect on magnetic phase transitions of magnetoelectric hexaferrite Ba0.7Sr1.3Zn2(Fe1-xAlx)(12)O-22
DOI:10.1103/PhysRevB.85.064402  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Chang, Hun;Lee, Hak Bong;Song, Young-Sang;Chung, Jae-Ho;Kim, S. A.;Oh, I. H.;Reehuis, M.;Schefer, J.;
7:5:1:21     Giant magnetoresistance due to magnetoelectric currents in Sr3Co2Fe24O41 hexaferrites
DOI:10.1063/1.4896326  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Wang, Xian;Su, Zhijuan;Sokolov, Alexander;Hu, Bolin;Andalib, Parisa;Chen, Yajie;Harris, Vincent G.;
7:5:1:22     Analysis of the alternating current conductivity and magnetic behaviors for the polycrystalline Y-type Ba0.5Sr1.5Co2(Fe1-xAlx)(12)O-22 hexaferrites
DOI:10.1063/1.4903835  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Wu, M. X.;Zhong, W. J.;Gao, X. S.;Liu, L. J.;Liu, Z. W.;
7:5:1:23     Lattice modulation induced by magnetic order in the magnetoelectric helimagnet Ba0.5Sr1.5Zn2Fe12O22
DOI:10.1103/PhysRevB.83.130401  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Asaka, T.;Yu, X. Z.;Hiraoka, Y.;Kimoto, K.;Hirayama, T.;Kimura, T.;Matsui, Y.;
7:5:1:24     Multilevel magnetization switching by electric field in c-axis oriented polycrystalline Z-type hexaferrite
DOI:10.1063/1.4816268  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Okumura, K.;Haruki, K.;Ishikura, T.;Hirose, S.;Kimura, T.;
7:5:1:25     Growth of M-type hexaferrite thin films with conical magnetic structure
DOI:10.1063/1.4776223  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Borisov, P.;Alaria, J.;Yang, T.;McMitchell, S. R. C.;Rosseinsky, M. J.;
7:5:1:26     Structural, dielectric, magnetic, and nuclear magnetic resonance studies of multiferroic Y-type hexaferrites
DOI:10.1063/1.4754532  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Khanduri, H.;Dimri, M. Chandra;Kooskora, H.;Heinmaa, I.;Viola, G.;Ning, H.;Reece, M. J.;Krustok, J.;Stern, R.;
7:5:1:27     Electric polarization of magnetic textures: New horizons of micromagnetism
DOI:10.1016/j.jmmm.2012.02.087  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:7  AU: Pyatakov, A. P.;Meshkov, G. A.;Zvezdin, A. K.;
7:5:1:28     TRANSITION-METAL OXIDES Resistance is not futile
DOI:10.1038/nmat2863  JN:NATURE MATERIALS  PY:2010
  TC:8  AU: Fennie, Craig J.;Schlom, Darrell G.;
7:5:1:29     Tensor properties of the magnetoelectric coupling in hexaferrites
DOI:10.1103/PhysRevB.89.134413  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Vittoria, Carmine;Somu, Sivasubramanian;Widom, Allan;
7:5:1:30     The effects of Co-Ti co-doping on the magnetic, electrical, and magnetodielectric behaviors of M-type barium hexaferrites
DOI:10.1063/1.4860948  JN:AIP ADVANCES  PY:2013
  TC:2  AU: Guan, Yujie;Lin, Yuanbin;Zou, Liangying;Miao, Qing;Zeng, Min;Liu, Zhongwu;Gao, Xingsen;Liu, Junming;
7:5:1:31     Magnetodielectric effect in Z-type hexaferrite
DOI:10.1063/1.3677672  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Zhang, X.;Zhao, Y. G.;Cui, Y. F.;Ye, L. D.;Wang, J. W.;Zhang, S.;Zhang, H. Y.;Zhu, M. H.;
7:5:1:32     Spin Structures and Domain Walls in Multiferroics Spin Structures and Magnetic Domain Walls in Multiferroics
DOI:10.1080/00150193.2012.743836  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Pyatakov, A. P.;Zvezdin, A. K.;Vlasov, A. M.;Sergeev, A. S.;Sechin, D. A.;Nikolaeva, E. P.;Nikolaev, A. V.;Chou, H.;Sun, S. J.;Calvet, L. E.;
7:5:1:33     Magnetic properties of Zn doped Co2Y hexaferrite by using high-field Mossbauer spectroscopy
DOI:10.1063/1.4865879  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Lim, Jung Tae;Kim, Chul Sung;
7:5:1:34     Magnetic fan structures in Ba0.5Sr1.5Zn2Fe12O22 hexaferrite revealed by resonant soft x-ray diffraction
DOI:10.1103/PhysRevB.88.174413  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Hearmon, Alexander J.;Johnson, R. D.;Beale, T. A. W.;Dhesi, S. S.;Luo, X.;Cheong, S. -W.;Steadman, P.;Radaelli, Paolo G.;
7:5:1:35     Investigation of magnetic properties of non-magnetic ion (Al, Ga, In) doped Ba2Mg0.5Co1.5Fe12O22
DOI:10.1063/1.3679023  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Lim, Jung Tae;Kim, Chin Mo;Lee, Bo Wha;Kim, Chul Sung;
7:5:1:36     Performance of Z-type hexagonal ferrite core under demagnetizing and external static fields
DOI:10.1063/1.3457224  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Kato, Tomotsugu;Mikami, Hideto;Noguchi, Shin;
7:5:1:37     Dielectric, magnetic, and lattice dynamics properties of Y-type hexaferrite Ba0.5Sr1.5Zn2Fe12O22: Comparison of ceramics and single crystals
DOI:10.1063/1.3402379  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Kamba, S.;Goian, V.;Savinov, M.;Buixaderas, E.;Nuzhnyy, D.;Marysko, M.;Kempa, M.;Bovtun, V.;Hlinka, J.;Knizek, K.;Vanek, P.;Novak, P.;Bursik, J.;Hiraoka, Y.;Kimura, T.;Kouril, K.;Stepankova, H.;
7:5:1:38     Strong magnetoelectric coupling in hexaferrites at room temperature
DOI:10.1063/1.4794745  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Ebnabbasi, Khabat;Mohebbi, Marjan;Vittoria, Carmine;
7:5:1:39     First observation of magnetoelectric effect in M-type hexaferrite thin films
DOI:10.1063/1.4795721  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:8  AU: Mohebbi, Marjan;Ebnabbasi, Khabat;Vittoria, Carmine;
7:5:1:40     Investigation of site preference of Zn doped Ba3Co2-xZnxFe24O41 by Mossbauer spectroscopy
DOI:10.1063/1.4861676  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Lim, Jung Tae;Kim, Chul Sung;
7:5:1:41     Magnetic properties of Ni substituted Y-type barium ferrite
DOI:10.1063/1.4860939  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Won, Mi Hee;Kim, Chul Sung;
7:5:1:42     Fe-57 NMR study of the magnetoelectric hexaferrite Ba0.5Sr1.5Zn2Fe12O22 and Ba0.5Sr1.5Zn2(Fe0.92Al0.08)(12)O-22
DOI:10.1103/PhysRevB.88.064404  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kwon, Sangil;Yoon, Dong Young;Lee, Soonchil;Chai, Yi Sheng;Chun, Sae Hwan;Kim, Kee Hoon;
7:5:1:43     Effect of Ni substitution on Y-type barium ferrite
DOI:10.1063/1.4794879  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Won, Mi Hee;Kim, Chul Sung;
7:5:1:44     Spin-phonon coupling in multiferroic Ba1.6Sr1.4CO2Fe24O41
DOI:10.1016/j.jmmm.2014.03.070  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Santos, Y. P.;Andrade, B. C.;Machado, R.;Macedo, M. A.;
7:5:1:45     Magnetic and Dielectric Properties in Multiferroic Y-type Hexaferrite
DOI:10.1080/15421406.2014.967614  JN:MOLECULAR CRYSTALS AND LIQUID CRYSTALS  PY:2014
  TC:0  AU: Xu, Wenfei;Wang, Zhi;Yang, Jing;Bai, Wei;Zhang, Yuanyuan;Tang, Xiaodong;
7:5:1:46     Room temperature magnetoelectric effects in bulk poly-crystalline materials of M- and Z-type hexaferrites
DOI:10.1063/1.4793606  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Ebnabbasi, Khabat;Mohebbi, Marjan;Vittoria, Carmine;
7:5:1:47     Magnetic properties and Fe-57 NMR studies of U-type hexaferrites
DOI:10.1016/j.jmmm.2011.03.033  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:4  AU: Dimri, M. Chandra;Khanduri, H.;Kooskora, H.;Heinmaa, I.;Joon, E.;Stern, R.;
7:5:1:48     Synthesis of single-phase Sr3Co2Fe24O41 Z-type ferrite by polymerizable complex method
DOI:10.1016/j.materresbull.2011.03.004  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:10  AU: Kikuchi, Takeyuki;Nakamura, Tatsuya;Yamasaki, Tohru;Nakanishi, Makoto;Fujii, Tatsuo;Takada, Jun;Ikeda, Yasunori;
7:5:1:49     Multi-domain resonance in textured Z-type hexagonal ferrite
DOI:10.1063/1.3669369  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Kato, Tomotsugu;Mikami, Hideto;Noguchi, Shin;
7:5:1:50     Magnetic and microwave properties of ferrimagnetic Zr-substituted Ba2Zn2Fe12O22 (Zn-Y) single crystals
DOI:10.1063/1.3560885  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Jalli, Jeevan;Hong, Yang-Ki;Bae, Seok;Lee, Jae-Jin;Abo, Gavin S.;Park, Ji-Hoon;Choi, Byoung-Chul;Mewes, Tim;Kim, Seong-Gon;Gee, Sung-Hoon;Nam, In-Tak;Tanaka, Terumitsu;
7:5:1:51     Magneto-electric effects on Sr Z-type hexaferrite at room temperature
DOI:10.1063/1.3678588  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Ebnabbasi, Khabat;Chen, Yajie;Geiler, Anton;Harris, Vincent;Vittoria, Carmine;
7:5:1:52     The crystal structure and magnetic properties of Ba2-xSrxCo2Fe12O22
DOI:10.1063/1.4866892  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Cho, Kwang Lae;Rhee, Chan Hyuk;Kim, Chul Sung;
7:5:1:53     Enhancement of Curie temperature of barium hexaferrite by dense electronic excitations
DOI:10.1063/1.4891647  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Sharma, Manju;Kashyap, Subhash C.;Gupta, Hem C.;Dimri, Mukesh C.;Asokan, K.;
7:5:1:54     Micromagnetic simulations of magnetoelectric materials
DOI:10.1063/1.3565999  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Fischbacher, Thomas;Franchin, Matteo;Fangohr, Hans;
7:5:1:55     Growth of Y-type hexaferrite thin films by alternating target laser ablation deposition
DOI:10.1016/j.jmmm.2013.05.050  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Mohebbi, Marjan;Vittoria, Carmine;
7:5:1:56     Realization of Giant Magnetoelectricity in Helimagnets (vol 104, art no 037204 , 2010)
DOI:10.1103/PhysRevLett.104.049901  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:1  AU: Chun, Sae Hwan;Chai, Yi Sheng;Oh, Yoon Seok;Jaiswal-Nagar, Deepshikha;Haam, So Young;Kim, Ingyu;Lee, Bumsung;Nam, Dong Hak;Ko, Kyung-Tae;Park, Jae-Hoon;Chung, Jae-Ho;Kim, Kee Hoon;
7:5:1:57     Lattice modulation induced by magnetic order in the magnetoelectric helimagnet Ba0.5Sr1.5Zn2Fe12O22 (vol 83, 130401, 2011)
DOI:10.1103/PhysRevB.83.179902  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Asaka, T.;Yu, X. Z.;Hiraoka, Y.;Kimoto, K.;Hirayama, T.;Kimura, T.;Matsui, Y.;
7:5:1:58     Al doping effect on magnetic phase transitions of magnetoelectric hexaferrite Ba0.7Sr1.3Zn2(Fe1-xAlx)(12)O-22 (vol 85, 064402, 2012)
DOI:10.1103/PhysRevB.86.059905  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Chang, Hun;Lee, Hak Bong;Song, Young-Sang;Chung, Jae-Ho;Kim, S. A.;Oh, I. H.;Reehuis, M.;Schefer, J.;
7:5:1:59     Mutual control of magnetization and electrical polarization by electric and magnetic fields at room temperature in Y-type BaSrCo2-xZnx Fe11AlO22 ceramics" (vol 104, 022907, 2014)
DOI:10.1063/1.4866286  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Hirose, Sakyo;Haruki, Kohei;Ando, Akira;Kimura, Tsuyoshi;
7:5:1:60     Numerical simulation of wave propagation in Y- and Z-type hexaferrites for high frequency applications
DOI:10.1063/1.3338970  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Wang, J. W.;Geiler, A. L.;Harris, V. G.;Vittoria, C.;
7:5:1:61     Internal magnetic fields in submicron particles of barium hexaferrite detected by Fe-57 NMR
DOI:10.1016/j.jmmm.2009.04.002  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:8  AU: Stepankova, Helena;Kouril, Karel;Chlan, Vojtech;Goernert, Peter;Mueller, Robert;Stepanek, Josef;
7:5:1:62     The effect of externally applied uniaxial compressive stress on the magnetic properties of power MnZn-ferrites
DOI:10.1007/s10853-013-7183-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:3  AU: Tsakaloudi, V.;Holz, D.;Zaspalis, V.;
7:5:2:1     Charge Order in LuFe2O4: An Unlikely Route to Ferroelectricity
DOI:10.1103/PhysRevLett.108.187601  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:24  AU: de Groot, J.;Mueller, T.;Rosenberg, R. A.;Keavney, D. J.;Islam, Z.;Kim, J. -W.;Angst, M.;
7:5:2:2     Competing Ferri- and Antiferromagnetic Phases in Geometrically Frustrated LuFe2O4
DOI:10.1103/PhysRevLett.108.037206  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:21  AU: de Groot, J.;Marty, K.;Lumsden, M. D.;Christianson, A. D.;Nagler, S. E.;Adiga, S.;Borghols, W. J. H.;Schmalzl, K.;Yamani, Z.;Bland, S. R.;de Souza, R.;Staub, U.;Schweika, W.;Su, Y.;Angst, M.;
7:5:2:3     Lattice dynamical probe of charge order and antipolar bilayer stacking in LuFe2O4
DOI:10.1103/PhysRevB.82.014304  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Xu, X. S.;de Groot, J.;Sun, Q. -C.;Sales, B. C.;Mandrus, D.;Angst, M.;Litvinchuk, A. P.;Musfeldt, J. L.;
7:5:2:4     Strong local lattice instability in hexagonal ferrites RFe2O4 (R = Lu, Y, Yb) revealed by x-ray absorption spectroscopy
DOI:10.1103/PhysRevB.89.045129  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Lafuerza, Sara;Garcia, Joaquin;Subias, Gloria;Blasco, Javier;Cuartero, Vera;
7:5:2:5     Origin of the colossal dielectric permittivity and magnetocapacitance in LuFe2O4
DOI:10.1063/1.3560564  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:24  AU: Ren, P.;Yang, Z.;Zhu, W. G.;Huan, C. H. A.;Wang, L.;
7:5:2:6     Dielectric Properties of Charge-Ordered LuFe2O4 Revisited: The Apparent Influence of Contacts
DOI:10.1103/PhysRevLett.109.016405  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:23  AU: Niermann, D.;Waschkowski, F.;de Groot, J.;Angst, M.;Hemberger, J.;
7:5:2:7     Charge and spin ordering in the mixed-valence compound LuFe2O4
DOI:10.1103/PhysRevB.81.134417  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Harris, A. B.;Yildirim, T.;
7:5:2:8     Intrinsic electrical properties of LuFe2O4
DOI:10.1103/PhysRevB.88.085130  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Lafuerza, Sara;Garcia, Joaquin;Subias, Gloria;Blasco, Javier;Conder, Kazimierz;Pomjakushina, Ekaterina;
7:5:2:9     Robust charge and magnetic orders under electric field and current in multiferroic LuFe2O4
DOI:10.1103/PhysRevB.81.144121  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Wen, Jinsheng;Xu, Guangyong;Gu, Genda;Shapiro, S. M.;
7:5:2:10     Ferroelectric charge order stabilized by antiferromagnetism in multiferroic LuFe2O4
DOI:10.1103/PhysRevB.84.140403  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Mulders, A. M.;Bartkowiak, M.;Hester, J. R.;Pomjakushina, E.;Conder, K.;
7:5:2:11     Evidence of oxygen-dependent modulation in LuFe2O4
DOI:10.1103/PhysRevB.85.064102  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Bourgeois, J.;Hervieu, M.;Poienar, M.;Abakumov, A. M.;Elkaim, E.;Sougrati, M. T.;Porcher, F.;Damay, F.;Rouquette, J.;Van Tendeloo, G.;Maignan, A.;Haines, J.;Martin, C.;
7:5:2:12     Determination of the sequence and magnitude of charge order in LuFe2O4 by resonant x-ray scattering
DOI:10.1103/PhysRevB.90.085130  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Lafuerza, Sara;Subias, Gloria;Garcia, Joaquin;Blasco, Javier;Nisbet, Gareth;Conder, Kazimierz;Pomjakushina, Ekaterina;
7:5:2:13     Electro-optical effects and temperature-dependent electrical properties of LuFe2O4 thin films
DOI:10.1016/j.tsf.2014.04.022  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Cai, Bo;Nakarmi, Mim L.;Franks, Brandon S.;Rai, Ram C.;
7:5:2:14     Infrared study of the charge-ordered multiferroic LuFe2O4
DOI:10.1103/PhysRevB.81.195121  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Vitucci, F. M.;Nucara, A.;Nicoletti, D.;Sun, Y.;Li, C. H.;Soret, J. C.;Schade, U.;Calvani, P.;
7:5:2:15     Structural properties in RFe2O4 compounds (R = Tm, Yb, and Lu)
DOI:10.1103/PhysRevB.90.094119  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Blasco, J.;Lafuerza, S.;Garcia, J.;Subias, G.;
7:5:2:16     Evolution of charge order through the magnetic phase transition of LuFe2O4
DOI:10.1103/PhysRevB.86.035121  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Bartkowiak, M.;Mulders, A. M.;Scagnoli, V.;Staub, U.;Pomjakushina, E.;Conder, K.;
7:5:2:17     Charge gap and charge-phonon coupling in LuFe2O4
DOI:10.1103/PhysRevB.87.144416  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Glamazda, A.;Choi, K. -Y.;Lemmens, P.;Wulferding, D.;Park, S.;Cheong, S. -W.;
7:5:2:18     Pressure effect on the magnetic order of LuFe2O4
DOI:10.1063/1.4819073  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Makarova, O. L.;Bourgeois, J.;Poienar, M.;Mirebeau, I.;Kichanov, S. E.;Andre, G.;Elkaim, E.;Hanfland, M.;Hervieu, M.;Maignan, A.;Haines, J.;Rouquette, J.;Martin, C.;Damay, F.;
7:5:2:19     Electronic transport and I-V characteristics of polycrystalline LuFe2O4
DOI:10.1063/1.3574400  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Fisher, B.;Genossar, J.;Patlagan, L.;Reisner, G. M.;
7:5:2:20     Growth diagram and magnetic properties of hexagonal LuFe2O4 thin films
DOI:10.1103/PhysRevB.85.155411  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Wang, Wenbin;Gai, Zheng;Chi, Miaofang;Fowlkes, Jason D.;Yi, Jieyu;Zhu, Leyi;Cheng, Xuemei;Keavney, David J.;Snijders, Paul C.;Ward, Thomas Z.;Shen, Jian;Xu, Xiaoshan;
7:5:2:21     Stoichiometric YFe2O4 (-) (delta) single crystals grown by the optical floating zone method
DOI:10.1016/j.jcrysgro.2015.07.015  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Mueller, Thomas;de Groot, Joost;Strempfer, Joerg;Angst, Manuel;
7:5:2:22     Pressure-Induced Structural Transition in LuFe2O4: Towards a New Charge Ordered State
DOI:10.1103/PhysRevLett.105.237203  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:8  AU: Rouquette, J.;Haines, J.;Al-Zein, A.;Papet, Ph.;Damay, F.;Bourgeois, J.;Hammouda, T.;Dore, F.;Maignan, A.;Hervieu, M.;Martin, C.;
7:5:2:23     Interplay between R 4f and Fe 3d states in charge-ordered RFe2O4 (R = Er, Tm, Lu)
DOI:10.1103/PhysRevB.87.184409  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Kim, D. H.;Hwang, Jihoon;Lee, Eunsook;Kim, J.;Lee, B. W.;Lee, Han-Koo;Kim, J. -Y.;Han, W.;Hong, S. C.;Kang, Chang-Jong;Min, B. I.;Kang, J. -S.;
7:5:2:24     Nonlinear transport properties and Joule heating effect in charge ordered LuFe2O4
DOI:10.1063/1.3562314  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Cao, S.;Li, J.;Tian, H. F.;Qin, Y. B.;Zeng, L. J.;Yang, H. X.;Li, J. Q.;
7:5:2:25     The adsorption-controlled growth of LuFe2O4 by molecular-beam epitaxy
DOI:10.1063/1.4755765  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Brooks, Charles M.;Misra, Rajiv;Mundy, Julia A.;Zhang, Lei A.;Holinsworth, Brian S.;O'Neal, Kenneth R.;Heeg, Tassilo;Zander, Willi;Schubert, J.;Musfeldt, Janice L.;Liu, Zi-Kui;Muller, David A.;Schiffer, Peter;Schlom, Darrell G.;
7:5:2:26     Magnetoelectric Effect Driven by Magnetic Domain Modification in LuFe2O4
DOI:10.1103/PhysRevLett.110.117602  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:7  AU: Kambe, Takashi;Fukada, Yukimasa;Kano, Jun;Nagata, Tomoko;Okazaki, Hiroyuki;Yokoya, Takayoshi;Wakimoto, Shuichi;Kakurai, Kazuhisa;Ikeda, Naoshi;
7:5:2:27     Effect of structural distortion on ferrimagnetic order in Lu1-xLxFe2O4 (L=Y and Er; x=0.0, 0.1, and 0.5)
DOI:10.1103/PhysRevB.82.024423  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Noh, Han-Jin;Sung, Hojin;Jeong, Jinwon;Jeong, Jinhwan;Kim, Sung Baek;Kim, Jae-Young;Kim, J. Y.;Cho, B. K.;
7:5:2:28     Infrared and transport properties of LuFe2O4 under electric fields
DOI:10.1103/PhysRevB.84.153105  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Vitucci, F. M.;Nucara, A.;Mirri, C.;Nicoletti, D.;Ortolani, M.;Schade, U.;Calvani, P.;
7:5:2:29     Evidence of magnetic phase separation in LuFe2O4
DOI:10.1103/PhysRevB.86.024413  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Bourgeois, J.;Andre, G.;Petit, S.;Robert, J.;Poienar, M.;Rouquette, J.;Elkaim, E.;Hervieu, M.;Maignan, A.;Martin, C.;Damay, F.;
7:5:2:30     Pressure effects on multiferroic LuFe2O4
DOI:10.1063/1.3360211  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Shen, X.;Xu, C. H.;Li, C. H.;Zhang, Y.;Zhao, Q.;Yang, H. X.;Sun, Y.;Li, J. Q.;Jin, C. Q.;Yu, R. C.;
7:5:2:31     Microstructure and oxidation states in multiferroic Lu-2(Fe,Mn)(3)O-7
DOI:10.1063/1.4764309  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Ma, Chao;Qin, Yuanbin;Yang, Huaixin;Tian, Huanfang;Li, Jianqi;Sardar, Kripasindhu;Walton, Richard I.;Su, Dong;Wu, Lijun;Zhu, Yimei;
7:5:2:32     Oxygen storage capacity and structural flexibility of LuFe2O4+x C x ( 0 <= x <= 0.5)
DOI:10.1038/NMAT3809  JN:NATURE MATERIALS  PY:2014
  TC:6  AU: Hervieu, M.;Guesdon, A.;Bourgeois, J.;Elkaim, E.;Poienar, M.;Damay, F.;Rouquette, J.;Maignan, A.;Martin, C.;
7:5:2:33     Structural and dielectric properties of LuFe2O4 thin films grown by pulsed-laser deposition
DOI:10.1016/j.tsf.2010.07.041  JN:THIN SOLID FILMS  PY:2010
  TC:10  AU: Liu, J.;Wang, Y.;Dai, J. Y.;
7:5:2:34     Observations of charge-ordered and magnetic domains in LuFe2O4 using transmission electron microscopy
DOI:10.1103/PhysRevB.86.054202  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Maruyama, T.;Murakami, Y.;Shindo, D.;Abe, N.;Arima, T.;
7:5:2:35     Helical scattering signatures of strain and electronic textures in YbFe2O4 from three-dimensional reciprocal-space imaging
DOI:10.1103/PhysRevB.85.014115  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Hearmon, Alexander J.;Prabhakaran, Dharmalingam;Nowell, Harriott;Fabrizi, Federica;Gutmann, Matthias J.;Radaelli, Paolo G.;
7:5:2:36     Preparation, Dielectric, and Magnetic Characteristics of LuFe2O4 Ceramics
DOI:10.1111/jace.12348  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Qin, Ying;Liu, Xiao Qiang;Wu, Yong Jun;Chen, Xiang Ming;
7:5:2:37     Infrared optical response of LuFe2O4 under dc electric field
DOI:10.1103/PhysRevB.85.014303  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Lee, Chul;Kim, JooYoun;Cheong, S. W.;Choi, E. J.;
7:5:2:38     Spin-charge-orbital coupling in multiferroic LuFe2O4 thin films
DOI:10.1063/1.4720401  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Rai, R. C.;Delmont, A.;Sprow, A.;Cai, B.;Nakarmi, M. L.;
7:5:2:39     Nonlinear Electric Conductivity of Charge Ordered System RFe2O4 (R = Lu, Yb)
DOI:10.1080/00150193.2013.773874  JN:FERROELECTRICS  PY:2013
  TC:3  AU: Nagata, T.;Fukada, Y.;Kawai, M.;Kano, J.;Kambe, T.;Dudzik, E.;Feyerherm, R.;Janolin, P. E.;Kiat, J. M.;Ikeda, N.;
7:5:2:40     Extrinsic and intrinsic nonlinear current-voltage characteristics in charge ordered oxides
DOI:10.1063/1.3681184  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Wang, F.;Zou, T.;Liu, Y.;Yan, L. -Q.;Sun, Y.;
7:5:2:41     Oxygen stoichiometry and magnetic properties of LuFe2O4+delta
DOI:10.1063/1.4792036  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Wang, Fan;Kim, Jungho;Gu, G. D.;Lee, Yongjae;Bae, Saebyok;Kim, Young-June;
7:5:2:42     Temperature Dependent Relaxation Behavior of Polycrystralline LuFe2O4 Studied By Dielectric Spectroscopy
DOI:10.1080/10584587.2013.787839  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Han, Ruobing;Wang, Zhihong;Dai, Chao;
7:5:2:43     Tunable dielectric properties in Mn-doped LuFe2O4 system
DOI:10.1557/jmr.2011.446  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:2  AU: Hou, Ying;Yao, Yiping;Dong, Sining;Huang, Xi;Sun, Xuefeng;Lia, Xiaoguang;
7:5:2:44     Dielectric tunability and magnetoelectric coupling in LuFe2O4 epitaxial thin film deposited by pulsed-laser deposition
DOI:10.1016/j.tsf.2012.06.058  JN:THIN SOLID FILMS  PY:2012
  TC:4  AU: Zeng, M.;Liu, J.;Qin, Y. B.;Yang, H. X.;Li, J. Q.;Dai, J. Y.;
7:5:2:45     Multiferroic Character and Magnetic Phase of LuFe2O4
DOI:10.1080/00150193.2011.577371  JN:FERROELECTRICS  PY:2011
  TC:4  AU: Ohishi, Daisuke;Hayakawa, Hironori;Akahama, Hiroshi;Ikeda, Naoshi;Kambe, Takashi;Matsuo, Yoji;Kimizuka, Noboru;Kano, Jun;Yoshii, Kenji;
7:5:2:46     Dielectric, Ferroelectric, and Magnetic Characteristics of LuFeCuO4 Ceramics
DOI:10.1111/j.1551-2916.2011.04858.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Qin, Ying;Chen, Xiang Ming;Liu, Xiao Qiang;
7:5:2:47     Dielectric and magnetic characteristics of LuFeMgO4 ceramics
DOI:10.1063/1.3500309  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Qin, Ying;Wang, Zhuo;Chen, Xiang Ming;Liu, Xiao Qiang;
7:5:2:48     Direct observation of low-temperature superstructure in spin-and charge-frustrated ferrite YFe2O4-delta
DOI:10.1103/PhysRevB.82.184119  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Horibe, Y.;Ikeda, N.;Yoshii, K.;Mori, S.;
7:5:2:49     Charge and spin ordering in the mixed-valence compound LuFe2O4 (vol 81, 134417, 2010)
DOI:10.1103/PhysRevB.82.029902  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Harris, A. B.;Yildirim, T.;
7:5:2:50     Infrared optical response of LuFe2O4 under dc electric field (vol 85, 014303, 2012)
DOI:10.1103/PhysRevB.85.059902  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Lee, Chul;Kim, JooYoun;Cheong, S. W.;Choi, E. J.;
7:5:2:51     Electric Field Response of Stoichiometric LuFe2O4
DOI:10.1080/00150193.2011.577294  JN:FERROELECTRICS  PY:2011
  TC:4  AU: Ikeda, Naoshi;Kubota, Masato;Hayakawa, Hironori;Akahama, Hiroshi;Ohishi, Daisuke;Nakanishi, Akiko;Funabiki, Takako;Matsuo, Yoji;Kimizuka, Noboru;Kambe, Takashi;Mori, Shigeo;Kano, Jun;
7:5:2:52     Study of LuFe2O4 Thin Film Growth and Its Structural and Multiferroic Properties
DOI:10.1080/10584587.2012.660803  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Dai, J. Y.;Liu, J.;
7:5:2:53     Charge ordering in PrCuMn6O12 and its behavior under pressure
DOI:10.1063/1.3294608  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Zhang, W.;Yao, L. D.;Yang, L. X.;Liu, Z. X.;Jin, C. Q.;Yu, R. C.;
7:5:2:54     Pressure-Induced Structural Transition in LuFe2O4: Towards a New Charge Ordered State (vol 105, 237203, 2010)
DOI:10.1103/PhysRevLett.111.019904  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:0  AU: Rouquette, J.;Haines, J.;Al-Zein, A.;Papet, Ph.;Damay, F.;Bourgeois, J.;Hammouda, T.;Dore, F.;Maignan, A.;Hervieu, M.;Martin, C.;
7:5:2:55     Temperature-dependent piezoelectric and dielectric properties of charge-ordered Lu2Fe2.1Mn0.9O7
DOI:10.1016/j.matlet.2011.10.032  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Chen, Y.;Dai, J. Y.;Au, K.;Lam, K. H.;Qin, Y. B.;Yang, H. X.;
7:5:3:1     Perovskite manganites hosting versatile multiferroic phases with symmetric and antisymmetric exchange strictions
DOI:10.1103/PhysRevB.81.100411  JN:PHYSICAL REVIEW B  PY:2010
  TC:57  AU: Ishiwata, Shintaro;Kaneko, Yoshio;Tokunaga, Yusuke;Taguchi, Yasujiro;Arima, Taka-hisa;Tokura, Yoshinori;
7:5:3:2     Spin Model of Magnetostrictions in Multiferroic Mn Perovskites
DOI:10.1103/PhysRevLett.105.037205  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:46  AU: Mochizuki, Masahito;Furukawa, Nobuo;Nagaosa, Naoto;
7:5:3:3     Theory of spin-phonon coupling in multiferroic manganese perovskites RMnO3
DOI:10.1103/PhysRevB.84.144409  JN:PHYSICAL REVIEW B  PY:2011
  TC:23  AU: Mochizuki, Masahito;Furukawa, Nobuo;Nagaosa, Naoto;
7:5:3:4     Magnetically driven ferroelectric atomic displacements in orthorhombic YMnO3
DOI:10.1103/PhysRevB.84.054440  JN:PHYSICAL REVIEW B  PY:2011
  TC:23  AU: Okuyama, D.;Ishiwata, S.;Takahashi, Y.;Yamauchi, K.;Picozzi, S.;Sugimoto, K.;Sakai, H.;Takata, M.;Shimano, R.;Taguchi, Y.;Arima, T.;Tokura, Y.;
7:5:3:5     Effects of holmium substitution on multiferroic properties in Tb0.67Ho0.33MnO3
DOI:10.1063/1.4792526  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:13  AU: Staruch, M.;Lawes, G.;Kumarasiri, A.;Cotica, L. F.;Jain, M.;
7:5:3:6     Origin of the Large Polarization in Multiferroic YMnO3 Thin Films Revealed by Soft- and Hard-X-Ray Diffraction
DOI:10.1103/PhysRevLett.108.047203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:21  AU: Wadati, H.;Okamoto, J.;Garganourakis, M.;Scagnoli, V.;Staub, U.;Yamasaki, Y.;Nakao, H.;Murakami, Y.;Mochizuki, M.;Nakamura, M.;Kawasaki, M.;Tokura, Y.;
7:5:3:7     Ferroelectricity of polycrystalline GdMnO3 and multifold magnetoelectric responses
DOI:10.1007/s00339-012-7453-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:6  AU: Lin, L.;Li, L.;Yan, Z. B.;Tao, Y. M.;Dong, S.;Liu, J. -M.;
7:5:3:8     Mechanism of exchange striction of ferroelectricity in multiferroic orthorhombic HoMnO3 single crystals
DOI:10.1103/PhysRevB.84.020101  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Lee, N.;Choi, Y. J.;Ramazanoglu, M.;Ratcliff, W., II;Kiryukhin, V.;Cheong, S. -W.;
7:5:3:9     Magnetic switch of polarization in epitaxial orthorhombic YMnO3 thin films
DOI:10.1063/1.3523352  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Fina, I.;Fabrega, L.;Marti, X.;Sanchez, F.;Fontcuberta, J.;
7:5:3:10     Ho substitution suppresses collinear Dy spin order and enhances polarization in DyMnO3
DOI:10.1063/1.3636399  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: Zhang, N.;Guo, Y. Y.;Lin, L.;Dong, S.;Yan, Z. B.;Li, X. G.;Liu, J. -M.;
7:5:3:11     Strain-Induced Ferromagnetism in Antiferromagnetic LuMnO3 Thin Films
DOI:10.1103/PhysRevLett.111.037201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:10  AU: White, J. S.;Bator, M.;Hu, Y.;Luetkens, H.;Stahn, J.;Capelli, S.;Das, S.;Doebeli, M.;Lippert, Th.;Malik, V. K.;Martynczuk, J.;Wokaun, A.;Kenzelmann, M.;Niedermayer, Ch.;Schneider, C. W.;
7:5:3:12     Multiferroicity and phase transitions in Tm-substituted GdMnO3
DOI:10.1063/1.4745885  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Li, L.;Lin, L.;Yan, Z. B.;He, Q. Y.;Liu, J-M.;
7:5:3:13     Coexistence of two cycloid-phases in multiferroic RMnO3: Consequence of the next-nearest-neighbor spin interaction modulations
DOI:10.1063/1.4707756  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Tao, Y. M.;Chen, D. P.;Qin, M. H.;Dong, S.;Gao, X. S.;Liu, J. -M.;
7:5:3:14     Cycloidal Order of 4f Moments as a Probe of Chiral Domains in DyMnO3
DOI:10.1103/PhysRevLett.105.167207  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:21  AU: Schierle, E.;Soltwisch, V.;Schmitz, D.;Feyerherm, R.;Maljuk, A.;Yokaichiya, F.;Argyriou, D. N.;Weschke, E.;
7:5:3:15     Coupled Magnetic Cycloids in Multiferroic TbMnO3 and Eu3/4Y1/4MnO3
DOI:10.1103/PhysRevLett.106.047203  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:21  AU: Jang, Hoyoung;Lee, J-S;Ko, K-T;Noh, W-S;Koo, T. Y.;Kim, J-Y;Lee, K-B;Park, J-H;Zhang, C. L.;Kim, Sung Baek;Cheong, S-W;
7:5:3:16     Multiferroicity in an orthorhombic YMnO3 single-crystal film
DOI:10.1063/1.3555462  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:18  AU: Nakamura, Masao;Tokunaga, Yusuke;Kawasaki, Masashi;Tokura, Yoshinori;
7:5:3:17     Uniaxial strain-induced magnetic order transition from E-type to A-type in orthorhombic YMnO3 from first-principles
DOI:10.1063/1.4899484  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Lin, S. X.;Fang, X. G.;Zhang, A. H.;Lu, X. B.;Gao, J. W.;Gao, X. S.;Zeng, M.;Liu, J. -M.;
7:5:3:18     Multiferroic Properties of o-LuMnO3 Controlled by b-Axis Strain
DOI:10.1103/PhysRevLett.113.167202  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Windsor, Y. W.;Huang, S. W.;Hu, Y.;Rettig, L.;Alberca, A.;Shimamoto, K.;Scagnoli, V.;Lippert, T.;Schneider, C. W.;Staub, U.;
7:5:3:19     Multiferroic phase diagram of Y partially substituted Dy1-xYxMnO3
DOI:10.1063/1.3536506  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Zhang, N.;Dong, S.;Zhang, G. Q.;Lin, L.;Guo, Y. Y.;Liu, J. -M.;Ren, Z. F.;
7:5:3:20     High-Pressure Hydrothermal Crystal Growth and Multiferroic Properties of a Perovskite YMnO3
DOI:10.1021/ja205408m  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:13  AU: Ishiwata, Shintaro;Tokunaga, Yusuke;Taguchi, Yasujiro;Tokura, Yoshinori;
7:5:3:21     Ferroelectric ground state and polarization-switching path of orthorhombic YMnO3 with coexisting E-type and cycloidal spin phases
DOI:10.1103/PhysRevB.88.014116  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Lee, Jung-Hoon;Song, Seungwoo;Jang, Hyun Myung;
7:5:3:22     Electromagnons in the multiferroic state of perovskite manganites with symmetric exchange striction
DOI:10.1103/PhysRevB.81.100413  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Takahashi, Youtarou;Ishiwata, Shintaro;Miyahara, Shin;Kaneko, Yoshio;Furukawa, Nobuo;Taguchi, Yasujiro;Shimano, Ryo;Tokura, Yoshinori;
7:5:3:23     Magnetic and electronic orderings in orthorhombic RMnO3 (R = Tm, Lu) studied by resonant soft x-ray powder diffraction
DOI:10.1103/PhysRevB.86.054425  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Garganourakis, M.;Bodenthin, Y.;de Souza, R. A.;Scagnoli, V.;Doenni, A.;Tachibana, M.;Kitazawa, H.;Takayama-Muromachi, E.;Staub, U.;
7:5:3:24     Effects of strain on ferroelectric polarization and magnetism in orthorhombic HoMnO3
DOI:10.1103/PhysRevB.87.014403  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Iusan, Diana;Yamauchi, Kunihiko;Barone, Paolo;Sanyal, Biplab;Eriksson, Olle;Profeta, Gianni;Picozzi, Silvia;
7:5:3:25     Effect of the synthesis atmosphere on the magnetic and structural properties of TbMnO3 multiferroic polycrystals
DOI:10.1016/j.scriptamat.2014.06.028  JN:SCRIPTA MATERIALIA  PY:2014
  TC:0  AU: Dias, Gustavo S.;Silveira, Luiz Gustavo D.;Cotica, Luiz F.;Santos, Ivair A.;Coelho, Adelino A.;Garcia, Ducinei;Eirasc, Jose A.;Sampaio, Juraci A.;
7:5:3:26     Strain-driven transition from E-type to A-type magnetic order in YMnO3 epitaxial films
DOI:10.1103/PhysRevB.86.024420  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Jimenez-Villacorta, F.;Gallastegui, J. A.;Fina, I.;Marti, X.;Fontcuberta, J.;
7:5:3:27     Effect of B-site Al-doping on electric polarization in DyMnO3
DOI:10.1063/1.3453869  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Zhang, N.;Wang, K. F.;Luo, S. J.;Wei, T.;Dong, X. W.;Li, S. Z.;Wan, J. G.;Liu, J. -M.;
7:5:3:28     Stability of multiferroicity against Dy/Mn off-stoichiometry in DyMnO3
DOI:10.1063/1.4868075  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Wang, J. X.;Liu, M. F.;Zhao, Z. Y.;Yan, Z. B.;Liu, J. -M.;
7:5:3:29     Intrinsic ferroelectric polarization of orthorhombic manganites with E-type spin order
DOI:10.1103/PhysRevB.85.184406  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Chai, Y. S.;Oh, Y. S.;Wang, L. J.;Manivannan, N.;Feng, S. M.;Yang, Y. S.;Yan, L. Q.;Jin, C. Q.;Kim, Kee Hoon;
7:5:3:30     The electrical and magnetic properties of epitaxial orthorhombic YMnO3 thin films grown under various oxygen pressures
DOI:10.1016/j.apsusc.2011.04.089  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:4  AU: Chen, Zhong;Ma, Chun-Lu;Wu, Fei-Xiang;Chen, Y. B.;Zhou, Jian;Yuan, Guo-Liang;Gu, Zheng-Bin;Zhang, Shan-Tao;Chen, Yan-Feng;
7:5:3:31     Enhanced polarization and magnetoelectric response in Tb1-x Ho (x) MnO3
DOI:10.1007/s00339-009-5535-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:7  AU: Lu, C. L.;Dong, S.;Wang, K. F.;Liu, J. -M.;
7:5:3:32     Experimental and ab initio investigations of the x-ray absorption near edge structure of orthorhombic LuMnO3
DOI:10.1063/1.4729002  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Hu, Y.;Borca, C. N.;Kleymenov, E.;Nachtegaal, M.;Delley, B.;Janousch, M.;Doenni, A.;Tachibana, M.;Kitazawa, H.;Takayama-Muromachi, E.;Kenzelmann, M.;Niedermayer, C.;Lippert, T.;Wokaun, A.;Schneider, C. W.;
7:5:3:33     Investigation on the pyroelectric property of polycrystalline GdMnO3
DOI:10.1063/1.4865376  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhang, X.;Zhao, Y. G.;Cui, Y. F.;Ye, L. D.;Zhao, D. Y.;Li, P. S.;Wang, J. W.;Zhu, M. H.;Zhang, H. Y.;Rao, G. H.;
7:5:3:34     MOCVD selective growth of orthorhombic or hexagonal YMnO3 phase on Si(100) substrate
DOI:10.1016/j.apsusc.2014.01.090  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:3  AU: Iliescu, I.;Boudard, M.;Rapenne, L.;Chaix-Pluchery, O.;RousselLaboratoire, H.;
7:5:3:35     Enhanced ferroelectricity in orthorhombic manganites Gd1-xHoxMnO3
DOI:10.1063/1.3535543  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Zhang, G. Q.;Luo, S. J.;Dong, S.;Gao, Y. J.;Wang, K. F.;Liu, J. -M.;
7:5:3:36     Lattice distortion and strain relaxation in epitaxial thin films of multiferroic TbMnO3 probed by X-ray diffractometry and micro-Raman spectroscopy
DOI:10.1016/j.apsusc.2012.10.121  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:3  AU: Hu, Y.;Stender, D.;Medarde, M.;Lippert, T.;Wokaun, A.;Schneider, C. W.;
7:5:3:37     Magnetic switch of polarization in epitaxial orthorhombic YMnO3 thin films (vol 97, 232905, 2010)
DOI:10.1063/1.3663627  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Fina, I.;Fabrega, L.;Marti, X.;Sanchez, F.;Fontcuberta, J.;
7:5:3:38     Effects of holmium substitution on multiferroic properties in Tb0.67Ho0.33MnO3 (vol 102, 062908, 2013)
DOI:10.1063/1.4870403  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Staruch, M.;Lawes, G.;Kumarasiri, A.;Cotica, L. F.;Jain, M.;
7:5:3:39     Enhanced dielectric and ferroelectric properties of BaTiO3 ceramics prepared by microwave assisted radiant hybrid sintering
DOI:10.1016/j.ceramint.2014.01.039  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Reddy, V. Raghavendra;Upadhyaya, Sanjay Kumar;Gupta, Ajay;Awasthi, Anand M.;Hussain, Shamima;
7:5:3:40     Large magneto (thermo) dielectric effect in multiferroic orthorhombic LuMnO3
DOI:10.1063/1.4722299  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Wang, L. J.;Chai, Y. S.;Feng, S. M.;Zhu, J. L.;Manivannan, N.;Jin, C. Q.;Gong, Z. Z.;Wang, X. H.;Li, L. T.;
7:5:4:1     Ordering process and ferroelectricity in a spinel derived from FeV2O4
DOI:10.1103/PhysRevB.85.054405  JN:PHYSICAL REVIEW B  PY:2012
  TC:17  AU: Zhang, Q.;Singh, K.;Guillou, F.;Simon, C.;Breard, Y.;Caignaert, V.;Hardy, V.;
7:5:4:2     Spin and orbital order in the vanadium spinel MgV2O4
DOI:10.1103/PhysRevB.82.140406  JN:PHYSICAL REVIEW B  PY:2010
  TC:28  AU: Wheeler, Elisa M.;Lake, Bella;Islam, A. T. M. Nazmul;Reehuis, Manfred;Steffens, Paul;Guidi, Tatiana;Hill, Adrian H.;
7:5:4:3     Dielectric properties and magnetostriction of the collinear multiferroic spinel CdV2O4
DOI:10.1103/PhysRevB.83.060402  JN:PHYSICAL REVIEW B  PY:2011
  TC:31  AU: Giovannetti, G.;Stroppa, A.;Picozzi, S.;Baldomir, D.;Pardo, V.;Blanco-Canosa, S.;Rivadulla, F.;Jodlauk, S.;Niermann, D.;Rohrkamp, J.;Lorenz, T.;Streltsov, S.;Khomskii, D. I.;Hemberger, J.;
7:5:4:4     Quantum 120 degrees model on pyrochlore lattice: Orbital ordering in MnV2O4
DOI:10.1103/PhysRevB.81.125127  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Chern, Gia-Wei;Perkins, Natalia;Hao, Zhihao;
7:5:4:5     Magnetic order and ice rules in the multiferroic spinel FeV2O4
DOI:10.1103/PhysRevB.86.060414  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: MacDougall, G. J.;Garlea, V. O.;Aczel, A. A.;Zhou, H. D.;Nagler, S. E.;
7:5:4:6     Critical behavior of spinel MnV2O4 investigated by dc-magnetization
DOI:10.1063/1.4884339  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhang, Lei;Han, Hui;Qu, Zhe;Fan, Jiyu;Ling, Langsheng;Zhang, Changjin;Pi, Li;Zhang, Yuheng;
7:5:4:7     Strain effects in epitaxial FeV2O4 thin films fabricated by pulsed laser deposition
DOI:10.1016/j.jcrysgro.2015.03.014  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Shi, Xiaolan;Wang, Yuhang;Zhao, Kehan;Lai, Xubo;Zhang, Liuwan;
7:5:4:8     Magnetic excitations and anomalous spin-wave broadening in multiferroic FeV2O4
DOI:10.1103/PhysRevB.89.224416  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Zhang, Qiang;Ramazanoglu, Mehmet;Chi, Songxue;Liu, Yong;Lograsso, Thomas A.;Vaknin, David;
7:5:4:9     Orbital structures in spinel vanadates AV(2)O(4) (A = Fe, Mn)
DOI:10.1103/PhysRevB.86.125142  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Nii, Y.;Sagayama, H.;Arima, T.;Aoyagi, S.;Sakai, R.;Maki, S.;Nishibori, E.;Sawa, H.;Sugimoto, K.;Ohsumi, H.;Takata, M.;
7:5:4:10     Magnon spectra and strong spin-lattice coupling in magnetically frustrated MnB2O4 (B = Mn,V): Inelastic light-scattering studies
DOI:10.1103/PhysRevB.89.134402  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Gleason, S. L.;Byrum, T.;Gim, Y.;Thaler, A.;Abbamonte, P.;MacDougall, G. J.;Martin, L. W.;Zhou, H. D.;Cooper, S. L.;
7:5:4:11     Orbital ordering in FeV2O4: Spinel with two orbitally active sites
DOI:10.1103/PhysRevB.84.235112  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Sarkar, Soumyajit;Saha-Dasgupta, T.;
7:5:4:12     Dielectric properties of single crystal spinels in the series FeV2O4, MnV2O4, and CoV2O4 in high magnetic fields
DOI:10.1103/PhysRevB.87.054432  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Kismarahardja, A.;Brooks, J. S.;Zhou, H. D.;Choi, E. S.;Matsubayashi, K.;Uwatoko, Y.;
7:5:4:13     Orbital-spin-coupled fluctuations in spinel vanadate MnV2O4
DOI:10.1103/PhysRevB.87.085111  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Nii, Yoichi;Abe, Nobuyuki;Arima, Taka-hisa;
7:5:4:14     Observation of the large magnetocaloric effect and suppression of orbital entropy change in Fe-doped MnV2O4
DOI:10.1063/1.4861630  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Huang, Z. H.;Luo, X.;Hu, L.;Tan, S. G.;Liu, Y.;Yuan, B.;Chen, J.;Song, W. H.;Sun, Y. P.;
7:5:4:15     Co[V-2]O-4: A Spinel Approaching the Itinerant Electron Limit
DOI:10.1103/PhysRevLett.106.056602  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:18  AU: Kismarahardja, A.;Brooks, J. S.;Kiswandhi, A.;Matsubayashi, K.;Yamanaka, R.;Uwatoko, Y.;Whalen, J.;Siegrist, T.;Zhou, H. D.;
7:5:4:16     Magnons and a two-component spin gap in FeV2O4
DOI:10.1103/PhysRevB.89.224404  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: MacDougall, G. J.;Brodsky, I.;Aczel, A. A.;Garlea, V. O.;Granroth, G. E.;Christianson, A. D.;Hong, T.;Zhou, H. D.;Nagler, S. E.;
7:5:4:17     Magnetic Field Induced Transition in Vanadium Spinels
DOI:10.1103/PhysRevLett.112.017207  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:2  AU: Mun, E. D.;Chern, Gia-Wei;Pardo, V.;Rivadulla, F.;Sinclair, R.;Zhou, H. D.;Zapf, V. S.;Batista, C. D.;
7:5:4:18     Valence states and spin structure of spinel FeV2O4 with different orbital degrees of freedom
DOI:10.1103/PhysRevB.85.165136  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Kang, J. -S.;Hwang, Jihoon;Kim, D. H.;Lee, Eunsook;Kim, W. C.;Kim, C. S.;Kwon, Sangil;Lee, Soonchil;Kim, J. -Y.;Ueno, T.;Sawada, M.;Kim, Bongjae;Kim, Beom Hyun;Min, B. I.;
7:5:4:19     Chemical pressure effects on structural, magnetic, and transport properties of Mn1-xCoxV2O4
DOI:10.1103/PhysRevB.84.205138  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Kiswandhi, A.;Brooks, J. S.;Lu, J.;Whalen, J.;Siegrist, T.;Zhou, H. D.;
7:5:4:20     Fe3+ doping effects on the structure and multiferroicity of Fe1+xV2-xO4 (0 <= x <= 0.4) spinels
DOI:10.1063/1.4730767  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Liu, N.;Zhao, K. H.;Shi, X. L.;Zhang, L. W.;
7:5:4:21     Orbital Disorder Induced by Charge Fluctuations in Vanadium Spinels
DOI:10.1103/PhysRevLett.108.247215  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:5  AU: Kato, Yasuyuki;Chern, Gia-Wei;Al-Hassanieh, K. A.;Perkins, Natalia B.;Batista, C. D.;
7:5:4:22     Magnetic susceptibility and specific heat of a spinel MnV2O4 single crystal
DOI:10.1103/PhysRevB.83.024403  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Myung-Whun, Kim;Kim, J. S.;Katsufuji, T.;Kremer, R. K.;
7:5:4:23     Change of the optical conductivity spectra with orbital and spin ordering in spinel MnV2O4
DOI:10.1103/PhysRevB.87.054424  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Katsufuji, T.;Takubo, T.;Suzuki, T.;
7:5:4:24     Observation of the large orbital entropy in Zn-doped orbital-spin-coupled system MnV2O4
DOI:10.1063/1.3303982  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Luo, X.;Sun, Y. P.;Lu, W. J.;Zhu, X. B.;Yang, Z. R.;Song, W. H.;
7:5:4:25     Appearance of magnetization jumps in magnetic hysteresis curves in spinel oxide FeV2O4
DOI:10.1063/1.3337683  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Nishihara, Sadafumi;Doi, Wataru;Ishibashi, Hiroki;Hosokoshi, Yuko;Ren, Xiao-Ming;Mori, Shigeo;
7:5:4:26     Evolution of phonon Raman spectra with orbital ordering in spinel MnV2O4
DOI:10.1103/PhysRevB.84.094406  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Takubo, K.;Kubota, R.;Suzuki, T.;Kanzaki, T.;Miyahara, S.;Furukawa, N.;Katsufuji, T.;
7:5:4:27     Evolution of magnetic and structural transitions and enhancement of magnetocaloric effect in Fe1-xMnx V2O4
DOI:10.1103/PhysRevB.89.104427  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Choudhury, D.;Suzuki, T.;Okuyama, D.;Morikawa, D.;Kato, K.;Takata, M.;Kobayashi, K.;Kumai, R.;Nakao, H.;Murakami, Y.;Bremholm, M.;Iversen, B. B.;Arima, T.;Tokura, Y.;Taguchi, Y.;
7:5:4:28     Critical behavior of spinel vanadate MnV1.95Al0.05O4
DOI:10.1016/j.jmmm.2012.08.013  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Fu, Y. K.;Luo, X.;Huang, Z. H.;Hu, L.;Lu, W. J.;Zhao, B. C.;Sun, Y. P.;
7:5:4:29     Orbital ordering in the geometrically frustrated MgV2O4: Ab initio electronic structure calculations
DOI:10.1103/PhysRevB.84.094407  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Pandey, Sudhir K.;
7:5:4:30     Orbital fluctuations in spinel Mn(V1-xAlx)(2)O-4 studied by thermal conductivity measurements
DOI:10.1103/PhysRevB.86.054436  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Omura, T.;Ishikawa, T.;Ishitsuka, Y.;Katsufuji, T.;
7:5:4:31     Infrared phonon anomalies and orbital ordering in single-crystalline MnV2O4 spinel
DOI:10.1103/PhysRevB.85.224423  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Myung-Whun, K.;Jang, S. Y.;Katsufuji, T.;Boris, A. V.;
7:5:4:32     Direct observation of orbital ordering in the spinel oxide FeCr2O4 through electrostatic potential using convergent-beam electron diffraction
DOI:10.1103/PhysRevB.81.180102  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Tsuda, K.;Morikawa, D.;Watanabe, Y.;Ohtani, S.;Arima, T.;
7:5:4:33     Nonmonotonic evolution of the charge gap in ZnV2O4 under pressure
DOI:10.1103/PhysRevB.86.020405  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Kuntscher, Christine;Rabia, Kaneez;Forthaus, M. K.;Abd-Elmeguid, M. M.;Rivadulla, F.;Kato, Y.;Batista, C. D.;
7:5:4:34     Photoinduced dynamics in spinel and pyrochlore vanadates as Mott-Hubbard insulators with magnetic ordering
DOI:10.1103/PhysRevB.88.060410  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Furuhashi, A.;Nishihara, H.;Takubo, K.;Katsufuji, T.;
7:5:4:35     Soft x-ray magnetic circular dichroism study of valence and spin states in FeT2O4 (T = V, Cr) spinel oxides
DOI:10.1063/1.4793769  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Kang, J. -S.;Hwang, Jihoon;Kim, D. H.;Lee, Eunsook;Kim, W. C.;Kim, C. S.;Lee, Han-Koo;Kim, J. -Y.;Han, S. W.;Hong, S. C.;Kim, Bongjae;Min, B. I.;
7:5:4:36     Large reversible magnetocaloric effect in spinel MnV2O4 with minimal Al substitution
DOI:10.1016/j.jmmm.2011.09.013  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Luo, X.;Lu, W. J.;Huang, Z. H.;Hu, X. B.;Hu, L.;Zhu, X. B.;Yang, Z. R.;Song, W. H.;Dai, J. M.;Sun, Y. P.;
7:5:4:37     Magnetic domain structure in the orbital-spin-coupled system MnV2O4
DOI:10.1103/PhysRevB.84.054421  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Murakami, Y.;Nii, Y.;Arima, T.;Shindo, D.;Yanagisawa, K.;Tonomura, A.;
7:5:4:38     Exchange constants and spin waves of the orbital-ordered noncollinear spinel MnV2O4
DOI:10.1103/PhysRevB.86.085138  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Nanguneri, R.;Savrasov, S. Y.;
7:5:4:39     Effect of pressure on the electronic and magnetic properties of CdV2O4: Density functional theory studies
DOI:10.1103/PhysRevB.86.085103  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Pandey, Sudhir K.;
7:5:4:40     Dynamic spin correlations in the frustrated cubic phase of MnV2O4
DOI:10.1103/PhysRevB.88.094430  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Chung, Jae-Ho;Song, Young-Sang;Kim, J. -H.;Suzuki, T.;Katsufuji, T.;Matsuda, M.;Lee, S. -H.;
7:5:4:41     TEM studies of domain formation mechanisms in MnV2O4
DOI:10.1016/j.jallcom.2012.02.031  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Murakami, Y.;Nii, Y.;Arima, T.;Shindo, D.;Yanagisawa, K.;Tonomura, A.;
7:5:4:42     Effect of Zn doping on the magneto-caloric effect and critical constants of Mott insulator MnV2O4
DOI:10.1063/1.4896955  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Shahi, Prashant;Singh, Harishchandra;Kumar, A.;Shukla, K. K.;Ghosh, A. K.;Yadav, A. K.;Nigam, A. K.;Chatterjee, Sandip;
7:5:4:43     Effects of applied pressure in ZnV2 O-4 and evidences for a dimerized structure
DOI:10.1063/1.3565410  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Pineiro, A.;Botana, A. S.;Pardo, V.;Botana, J.;Pereiro, M.;Baldomir, D.;Arias, J. E.;
7:5:4:44     The micromagnetic study of the vanadate spinel MnV2O4
DOI:10.1016/j.jmmm.2010.11.083  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:3  AU: Huang, Yuanjie;Qu, Zhe;Zhang, Yuheng;
7:5:4:45     A-Type Antiferro-Orbital Ordering with I4(1)/a Symmetry and Geometrical Frustration in the Spinel Vanadate MgV2O4
DOI:10.1103/PhysRevLett.111.267201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Niitaka, S.;Ohsumi, H.;Sugimoto, K.;Lee, S.;Oshima, Y.;Kato, K.;Hashizume, D.;Arima, T.;Takata, M.;Takagi, H.;
7:5:4:46     Magnetic shape memory effect in orbital-spin-coupled system MnV2O4
DOI:10.1063/1.3681581  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Nii, Y.;Abe, N.;Taniguchi, K.;Arima, T.;
7:5:5:1     Near-Room-Temperature Colossal Magnetodielectricity and Multiglass Properties in Partially Disordered La2NiMnO6
DOI:10.1103/PhysRevLett.108.127201  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:56  AU: Choudhury, D.;Mandal, P.;Mathieu, R.;Hazarika, A.;Rajan, S.;Sundaresan, A.;Waghmare, U. V.;Knut, R.;Karis, O.;Nordblad, P.;Sarma, D. D.;
7:5:5:2     Dielectric, Ferromagnetic Characteristics, and Room-Temperature Magnetodielectric Effects in Double Perovskite La2CoMnO6 Ceramics
DOI:10.1111/j.1551-2916.2010.04139.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:31  AU: Lin, Yi Qi;Chen, Xiang Ming;
7:5:5:3     Preparation, characterization and dielectric tunability of La2NiMnO6 ceramics
DOI:10.1016/j.jallcom.2013.12.170  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Li, Changnian;Liu, Bangxu;He, Yanyan;Lv, Chao;He, Hua;Xu, Yebin;
7:5:5:4     Magnetism driven ferroelectricity above liquid nitrogen temperature in Y2CoMnO6
DOI:10.1063/1.4812728  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:16  AU: Sharma, G.;Saha, J.;Kaushik, S. D.;Siruguri, V.;Patnaik, S.;
7:5:5:5     Dielectric and Magnetodielectric Properties of R2NiMnO6 (R = Nd, Eu, Gd, Dy, and Y)
DOI:10.1111/jace.13039  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:6  AU: Kakarla, Devi Chandrasekhar;Jyothinagaram, Krishna Murthy;Das, Amal Kumar;Adyam, Venimadhav;
7:5:5:6     Spin-phonon coupling in Gd(Co1/2Mn1/2)O-3 perovskite
DOI:10.1063/1.4829902  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Silva, R. X.;Reichlova, H.;Marti, X.;Barbosa, D. A. B.;Lufaso, M. W.;Araujo, B. S.;Ayala, A. P.;Paschoal, C. W. A.;
7:5:5:7     Multiferroic behavior in the double-perovskite Lu2MnCoO6
DOI:10.1103/PhysRevB.84.134427  JN:PHYSICAL REVIEW B  PY:2011
  TC:19  AU: Yanez-Vilar, S.;Mun, E. D.;Zapf, V. S.;Ueland, B. G.;Gardner, J. S.;Thompson, J. D.;Singleton, J.;Sanchez-Andujar, M.;Mira, J.;Biskup, N.;Senaris-Rodriguez, M. A.;Batista, C. D.;
7:5:5:8     Magnetic and dielectric properties of sol-gel derived nanoparticles of double perovskite Y2NiMnO6
DOI:10.1063/1.4748058  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Maiti, R. P.;Dutta, S.;Mukherjee, M.;Mitra, M. K.;Chakravorty, Dipankar;
7:5:5:9     Magnetic entropy change and critical exponents in double perovskite Y2NiMnO6
DOI:10.1016/j.jmmm.2014.05.035  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Sharma, G.;Tripathi, T. S.;Saha, J.;Patnaik, S.;
7:5:5:10     Griffiths phase-like behavior and spin-phonon coupling in double perovskite Tb2NiMnO6
DOI:10.1063/1.3671674  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Nair, Harikrishnan S.;Swain, Diptikanta;Hariharan, N.;Adiga, Shilpa;Narayana, Chandrabhas;Elzabeth, Suja;
7:5:5:11     Magnetic and dielectric properties of metamagnetic TbCo0.5Mn0.5O3.07 ceramics
DOI:10.1007/s10853-014-8076-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:3  AU: Su, J.;Zhang, J. T.;Lu, X. M.;Lu, C. J.;He, J.;Li, Q. C.;Zhou, J.;Zhu, J. S.;
7:5:5:12     Theoretical prediction of multiferroicity in double perovskite Y2NiMnO6
DOI:10.1103/PhysRevB.82.134429  JN:PHYSICAL REVIEW B  PY:2010
  TC:19  AU: Kumar, Sanjeev;Giovannetti, Gianluca;van den Brink, Jeroen;Picozzi, Silvia;
7:5:5:13     Electronic structure and phonons in La2CoMnO6: A ferromagnetic insulator driven by Coulomb-assisted spin-orbit coupling
DOI:10.1103/PhysRevB.84.035131  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Baidya, Santu;Saha-Dasgupta, T.;
7:5:5:14     Strain control of orbital polarization and correlated metal-insulator transition in La2CoMnO6 from first principles
DOI:10.1063/1.3662859  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Lv, Shuhui;Li, Hongping;Wang, Zhongchang;Han, Lin;Liu, Yao;Liu, Xiaojuan;Meng, Jian;
7:5:5:15     Giant zero field cooled spontaneous exchange bias effect in phase separated La1.5Sr0.5CoMnO6
DOI:10.1063/1.4855135  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Murthy, J. Krishna;Venimadhav, A.;
7:5:5:16     Spin-phonon coupling in BaFe12O19 M-type hexaferrite
DOI:10.1063/1.4904062  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Silva Junior, Flavio M.;Paschoal, Carlos W. A.;
7:5:5:17     Griffiths phase, spin-phonon coupling, and exchange bias effect in double perovskite Pr2CoMnO6
DOI:10.1063/1.4902078  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Liu, Wenjie;Shi, Lei;Zhou, Shiming;Zhao, Jiyin;Li, Yang;Guo, Yuqiao;
7:5:5:18     Spin-phonon coupling in Y2NiMnO6 double perovskite probed by Raman spectroscopy
DOI:10.1063/1.4804988  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Macedo Filho, Raimundo Bezerra;Ayala, Alejandro Pedro;de Araujo Paschoal, Carlos William;
7:5:5:19     Synthesis of nanocrystalline LaMn0.5Fe0.5O3 powders via a PVA sol-gel route
DOI:10.1016/j.ceramint.2012.12.094  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Zeng, Chunlian;He, Yanyan;Li, Changnian;Xu, Yebin;
7:5:5:20     Magnetodielectric behavior in La2CoMnO6 nanoparticles
DOI:10.1063/1.3673862  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Murthy, J. Krishna;Venimadhav, A.;
7:5:5:21     Dielectric relaxations in La2NiMnO6 with signatures of Griffiths phase
DOI:10.1063/1.4876723  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Biswal, A. K.;Ray, J.;Babu, P. D.;Siruguri, V.;Vishwakarma, P. N.;
7:5:5:22     Re-entrant spin glass behaviour and magneto-dielectric effect in insulating Sm2NiMnO6 double perovskite
DOI:10.1039/c3tc31203h  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:2  AU: Lekshmi, P. Neenu;Raji, G. R.;Vasundhara, M.;Varma, Manoj Raama;Pillai, S. Savitha;Valant, M.;
7:5:5:23     The giant dielectric tunability effect in bulk Y2NiMnO6 around room temperature
DOI:10.1007/s00339-011-6608-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:11  AU: Tang, M. H.;Xiao, Y. G.;Jiang, B.;Hou, J. W.;Li, J. C.;He, J.;
7:5:5:24     Electronic and magnetic properties of La2NiMnO6 and La2CoMnO6 with cationic ordering
DOI:10.1063/1.3683550  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Zhu, Min;Lin, Yong;Lo, Edward W. C.;Wang, Qiong;Zhao, Zhengjie;Xie, Wenhui;
7:5:5:25     The giant dielectric constant and tunable properties of La2NiMnO6-xMgO ceramics
DOI:10.1016/j.jallcom.2014.07.119  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Chen, Hao;Cao, Zhenzhu;Wang, Liying;He, Weiyan;Sun, Junmin;Zhang, Yongfeng;Ruan, Xuezheng;
7:5:5:26     Colossal magnetoresistance in the double perovskite oxide La2CoMnO6
DOI:10.1063/1.3350907  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:17  AU: Mahato, Rabindra Nath;Sethupathi, K.;Sankaranarayanan, V.;
7:5:5:27     Observation of spin glass state in weakly ferromagnetic Sr2FeCoO6 double perovskite
DOI:10.1063/1.3686137  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Pradheesh, R.;Nair, Harikrishnan S.;Kumar, C. M. N.;Lamsal, Jagat;Nirmala, R.;Santhosh, P. N.;Yelon, W. B.;Malik, S. K.;Sankaranarayanan, V.;Sethupathi, K.;
7:5:5:28     Atomic and electronic structure of La2CoMnO6 on SrTiO3 and LaAlO3 substrates from first principles
DOI:10.1063/1.4807410  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Lv, Shuhui;Wang, Zhongchang;Saito, Mitsuhiro;Ikuhara, Yuichi;
7:5:5:29     Reentrant cluster glass behavior in La2CoMnO6 nanoparticles
DOI:10.1063/1.4802658  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Murthy, J. Krishna;Venimadhav, A.;
7:5:5:30     B-site ordering induced suppression of magnetic cluster glass and dielectric anomaly in La2-xBixCoMnO6
DOI:10.1063/1.4722936  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Bai, Yijia;Liu, Xiaojuan;Xia, Yanjie;Li, Hongping;Deng, Xiaolong;Han, Lin;Liang, Qingshuang;Wu, Xiaojie;Wang, Zhongchang;Meng, Jian;
7:5:5:31     Evaluation of the intrinsic magneto-dielectric coupling in LaMn0.5Co0.5O3 single crystals
DOI:10.1063/1.4879642  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Manna, Kaustuv;Joshi, Rajeev S.;Elizabeth, Suja;Kumar, P. S. Anil;
7:5:5:32     Strong ferromagnetic-dielectric coupling in multiferroic Lu2CoMnO6 single crystals
DOI:10.1063/1.4869479  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Lee, N.;Choi, H. Y.;Jo, Y. J.;Seo, M. S.;Park, S. Y.;Choi, Y. J.;
7:5:5:33     Structure, magnetic, and dielectric properties of La2Ni(Mn1-xTix)O-6 ceramics
DOI:10.1063/1.4704392  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Yang, W. Z.;Liu, X. Q.;Lin, Y. Q.;Chen, X. M.;
7:5:5:34     The effect of Ca-substitution in La-site on the magnetic properties of La2CoMnO6
DOI:10.1063/1.4890321  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Li, Qiu-hang;Li, Na;Hu, Jian-zhong;Han, Qi;Ma, Qing-shan;Ge, Lei;Xiao, Biao;Xu, Ming-xiang;
7:5:5:35     Influence of bismuth on the magnetic & electrical properties of La2MnNiO6
DOI:10.1016/j.jmmm.2013.07.062  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:3  AU: Nautiyal, Pranjal;Seikh, Md. Motin;Pralong, V.;Kundu, Asish K.;
7:5:5:36     Collective vibrational modes, x-ray photoemission spectra, and dielectric susceptibility of Ba2YMO6 (M = Nb,Ta)
DOI:10.1103/PhysRevB.88.075129  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Dutta, Alo;Sinha, T. P.;Shannigrahi, Santiranjan;
7:5:5:37     Nature of short-range ferromagnetic ordered state above TC in double perovskite La2NiMnO6
DOI:10.1063/1.3459141  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Zhou, S. M.;Guo, Y. Q.;Zhao, J. Y.;Zhao, S. Y.;Shi, L.;
7:5:5:38     An Original Polymorph Sequence in the High-Temperature Evolution of the Perovskite Pb2TmSbO6
DOI:10.1021/ja104417f  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:12  AU: Larregola, Sebastian A.;Alonso, Jose A.;Sheptyakov, Denis;Alguero, Miguel;Munoz, Angel;Pomjakushin, Vladimir;Pedregosa, Jose C.;
7:5:5:39     Magnetization-steps in Y2CoMnO6 double perovskite: The role of antisite disorder
DOI:10.1063/1.4896399  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Nair, Harikrishnan S.;Pradheesh, R.;Xiao, Yinguo;Cherian, Dona;Elizabeth, Suja;Hansen, Thomas;Chatterji, Tapan;Brueckel, Th;
7:5:5:40     Electronic structure and magnetic properties of hole-carrier-doped La2MnNiO6:La2-xSrxMnNiO6
DOI:10.1103/PhysRevB.81.224402  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Kim, Bongjae;Choi, Hong Chul;Kim, Beom Hyun;Min, B. I.;
7:5:5:41     First-principles study on the differences of possible ferroelectric behavior and magnetic exchange interaction between Bi2NiMnO6 and La2NiMnO6
DOI:10.1063/1.4768268  JN:AIP ADVANCES  PY:2012
  TC:6  AU: Zhao, Hong Jian;Chen, Xiang Ming;
7:5:5:42     Structure, magnetic, and dielectric characteristics of Ln(2)NiMnO(6) (Ln = Nd and Sm) ceramics
DOI:10.1063/1.4752262  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Yang, W. Z.;Liu, X. Q.;Zhao, H. J.;Lin, Y. Q.;Chen, X. M.;
7:5:5:43     Lanthanide contraction effect on crystal structures, magnetic, and dielectric properties in ordered double perovskites LnPbCoSbO(6) (Ln = La, Pr, Nd)
DOI:10.1063/1.4873457  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Han, L.;Bai, Y. J.;Meng, F. Z.;Liu, X. J.;Yao, C. G.;Meng, J. L.;Liang, Q. S.;Wu, X. J.;Meng, J.;
7:5:5:44     Magnetic, dielectric and transport characteristics of Ln(2)CoMnO(6) (Ln=Nd and Sm) double perovskite ceramics
DOI:10.1016/j.jmmm.2014.07.017  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Yang, W. Z.;Liu, X. Q.;Zhao, H. J.;Chen, X. M.;
7:5:5:45     Engineering the microstructure and magnetism of La2CoMnO6-delta thin films by tailoring oxygen stoichiometry
DOI:10.1063/1.4904410  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Galceran, R.;Frontera, C.;Balcells, Ll.;Cisneros-Fernandez, J.;Lopez-Mir, L.;Roqueta, J.;Santiso, J.;Bagues, N.;Bozzo, B.;Pomar, A.;Sandiumenge, F.;Martinez, B.;
7:5:5:46     Electronic structure and linear optical properties of Sr2CdWO6 through Modified Becke-Johnson potential
DOI:10.1016/j.commatsci.2013.11.023  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: Dutta, Alo;Sinha, T. P.;
7:5:5:47     Neutron diffraction study of MnNiGa2-Structural and magnetic behaviour
DOI:10.1063/1.4857455  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Wang, J. L.;Ma, L.;Hofmann, M.;Avdeev, M.;Kennedy, S. J.;Campbell, S. J.;Din, M. F. Md;Hoelzel, M.;Wu, G. H.;Dou, S. X.;
7:5:5:48     Structure Correlated Enhancement in Dielectric and Electrical Properties of Strontium Based Niobates
DOI:10.1080/10584587.2010.492285  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Bishnoi, Bhagwati;Mehta, P. K.;Kumar, Ravi;Choudhary, R. J.;Phase, D. M.;
7:5:5:49     Dielectric and optical properties of Ba0.6Sr0.4Ti0.99Fe0.01O3 thin films deposited by pulsed laser deposition technique for microwave tunable devices
DOI:10.1016/j.jallcom.2013.06.057  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Laishram, Radhapiyari;Pandey, S. K.;Thakur, O. P.;Bhattacharya, D. K.;
7:5:5:50     Effect of the internal pressure and the anti-site disorder on the structure and magnetic properties of ALaFeTiO(6) (A=Ca, Sr, Ba) double perovskite oxides
DOI:10.1016/j.jmmm.2012.07.035  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Elbadawi, A. A.;Yassin, O. A.;Gismelseed, Abbasher A.;
7:5:6:1     Spin-Canting-Induced Improper Ferroelectricity and Spontaneous Magnetization Reversal in SmFeO3
DOI:10.1103/PhysRevLett.107.117201  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:61  AU: Lee, Jung-Hoon;Jeong, Young Kyu;Park, Jung Hwan;Oak, Min-Ae;Jang, Hyun Myung;Son, Jong Yeog;Scott, James F.;
7:5:6:2     Hydrothermal synthesis and magnetic properties of multiferroic rare-earth orthoferrites
DOI:10.1016/j.jallcom.2013.08.129  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Zhou, Zhiqiang;Guo, Li;Yang, Haixia;Liu, Qiang;Ye, Feng;
7:5:6:3     Spin switching and magnetization reversal in single-crystal NdFeO3
DOI:10.1103/PhysRevB.87.184405  JN:PHYSICAL REVIEW B  PY:2013
  TC:14  AU: Yuan, S. J.;Ren, W.;Hong, F.;Wang, Y. B.;Zhang, J. C.;Bellaiche, L.;Cao, S. X.;Cao, G.;
7:5:6:4     Room-Temperature Multiferroic Hexagonal LuFeO3 Films
DOI:10.1103/PhysRevLett.110.237601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:18  AU: Wang, Wenbin;Zhao, Jun;Wang, Wenbo;Gai, Zheng;Balke, Nina;Chi, Miaofang;Lee, Ho Nyung;Tian, Wei;Zhu, Leyi;Cheng, Xuemei;Keavney, David J.;Yi, Jieyu;Ward, Thomas Z.;Snijders, Paul C.;Christen, Hans M.;Wu, Weida;Shen, Jian;Xu, Xiaoshan;
7:5:6:5     Structurally Tailored Hexagonal Ferroelectricity and Multiferroism in Epitaxial YbFeO3 Thin-Film Heterostructures
DOI:10.1021/ja210341b  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:20  AU: Jeong, Young Kyu;Lee, Jung-Hoon;Ahn, Suk-Jin;Song, Seung-Woo;Jang, Hyun Myung;Choi, Hyojin;Scott, James F.;
7:5:6:6     Interface Strain-Induced Multiferroicity in a SmFeO3 Film
DOI:10.1021/am500762c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:2  AU: Cheng, Zhenxiang;Hong, Fang;Wang, Yuanxu;Ozawa, Kiyoshi;Fujii, Hiroki;Kimura, Hideo;Du, Yi;Wang, Xiaolin;Dou, Shixue;
7:5:6:7     Preparation and characterization of Bi-doped LuFeO3 thin films grown on LaNiO3 substrate
DOI:10.1016/j.jcrysgro.2013.10.039  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:4  AU: Zhu, Liping;Deng, Hongmei;Liu, Jian;Sun, Lin;Yang, Pingxiong;Jiang, Anquan;Chu, Junhao;
7:5:6:8     Relaxor-like improper ferroelectricity induced by S-i center dot S-j-type collinear spin ordering in a M-type hexaferrite PbFe6Ga6O19
DOI:10.1016/j.actamat.2013.09.007  JN:ACTA MATERIALIA  PY:2013
  TC:0  AU: Na, Eun Hye;Song, Seungwoo;Koo, Yang-Mo;Jang, Hyun M.;
7:5:6:9     Weak ferromagnetism in hexagonal orthoferrites RFeO3 (R = Lu, Er-Tb)
DOI:10.1063/1.3643043  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:19  AU: Akbashev, A. R.;Semisalova, A. S.;Perov, N. S.;Kaul, A. R.;
7:5:6:10     Electric field control of magnetization in Nd1-xSmxFeO3 (x=0, 0.2, and 0.4) at room temperature
DOI:10.1063/1.4867024  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Du, Chuanjiang;Qin, Hongwei;Ren, Shaoqing;Zhao, Lei;Zhao, Minglei;Su, Wenbin;Hu, Jifan;
7:5:6:11     Morphology-controlled synthesis of orthorhombic LuFeO3 particles via a hydrothermal route
DOI:10.1016/j.jallcom.2014.08.057  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Zhou, M.;Yang, H.;Xian, T.;Ma, J. Y.;Zhang, H. M.;Feng, W. J.;Wei, Z. Q.;Jiang, J. L.;
7:5:6:12     Structural and electronic origin of the magnetic structures in hexagonal LuFeO3
DOI:10.1103/PhysRevB.90.014436  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Wang, Hongwei;Solovyev, Igor V.;Wang, Wenbin;Wang, Xiao;Ryan, Philip J.;Keavney, David J.;Kim, Jong-Woo;Ward, Thomas Z.;Zhu, Leyi;Shen, Jian;Cheng, X. M.;He, Lixin;Xu, Xiaoshan;Wu, Xifan;
7:5:6:13     Crystal field splitting and optical bandgap of hexagonal LuFeO3 films
DOI:10.1063/1.4771601  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Wang, Wenbin;Wang, Hongwei;Xu, Xiaoying;Zhu, Leyi;He, Lixin;Wills, Elizabeth;Cheng, Xuemei;Keavney, David J.;Shen, Jian;Wu, Xifan;Xu, Xiaoshan;
7:5:6:14     The multiferroic perovskite YFeO3
DOI:10.1063/1.4791697  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:10  AU: Shang, Mingyu;Zhang, Chenyang;Zhang, Tingsong;Yuan, Lin;Ge, Lei;Yuan, Hongming;Feng, Shouhua;
7:5:6:15     Optical properties and electronic structure of multiferroic hexagonal orthoferrites RFeO3 (R = Ho, Er, Lu)
DOI:10.1063/1.3693588  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Pavlov, V. V.;Akbashev, A. R.;Kalashnikova, A. M.;Rusakov, V. A.;Kaul, A. R.;Bayer, M.;Pisarev, R. V.;
7:5:6:16     Dielectric, ferroelectric and magnetic properties of Mn-doped LuFeO3 ceramics
DOI:10.1063/1.4789605  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Qin, Ying;Liu, Xiao Qiang;Chen, Xiang Ming;
7:5:6:17     k=0 Magnetic Structure and Absence of Ferroelectricity in SmFeO3
DOI:10.1103/PhysRevLett.113.217203  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Kuo, C. -Y.;Drees, Y.;Fernandez-Diaz, M. T.;Zhao, L.;Vasylechko, L.;Sheptyakov, D.;Bell, A. M. T.;Pi, T. W.;Lin, H. -J.;Wu, M. -K.;Pellegrin, E.;Valvidares, S. M.;Li, Z. W.;Adler, P.;Todorova, A.;Kuechler, R.;Steppke, A.;Tjeng, L. H.;Hu, Z.;Komarek, A. C.;
7:5:6:18     Room temperature multiferroicity in orthorhombic LuFeO3
DOI:10.1063/1.4892664  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chowdhury, Ujjal;Goswami, Sudipta;Bhattacharya, Dipten;Ghosh, Jiten;Basu, Soumen;Neogi, Samya;
7:5:6:19     Optical properties of multiferroic LuFeO3 ceramics
DOI:10.1016/j.ceramint.2013.07.001  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Zhu, L. P.;Deng, H. M.;Sun, L.;Yang, J.;Yang, P. X.;Chu, J. H.;
7:5:6:20     Hydrothermal synthesis and magnetic properties of Fe3+-doped multiferroic hexagonal rare-earth manganates
DOI:10.1016/j.jallcom.2014.07.162  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Guo, Li;Zhou, Zhiqiang;Yuan, Hongming;
7:5:6:21     First-order spin reorientation transition and specific-heat anomaly in CeFeO3
DOI:10.1063/1.4821516  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Yuan, S. J.;Cao, Y. M.;Li, L.;Qi, T. F.;Cao, S. X.;Zhang, J. C.;DeLong, L. E.;Cao, G.;
7:5:6:22     Comment on "Spin-Canting-Induced Improper Ferroelectricity and Spontaneous Magnetization Reversal in SmFeO3"
DOI:10.1103/PhysRevLett.108.219701  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:10  AU: Johnson, R. D.;Terada, N.;Radaelli, P. G.;
7:5:6:23     Comment on "Spin-Canting-Induced Improper Ferroelectricity and Spontaneous Magnetization Reversal in SmFeO3'' Reply
DOI:10.1103/PhysRevLett.108.219702  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:10  AU: Lee, Jung-Hoon;Jeong, Young Kyu;Park, Jung Hwan;Oak, Min-Ae;Jang, Hyun Myung;Son, Jong Yeog;Scott, James F.;
7:5:6:24     Cluster-glass behavior correlated with spin reorientation in Yb1-x Pr (x) FeO3
DOI:10.1007/s00339-012-7221-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Yuan, Shujuan;Chang, Fenfen;Cao, Yiming;Wang, Xinyan;Kang, Baojuan;Zhang, Jincang;Cao, Shixun;
7:5:6:25     Intrinsic magnetic properties of hexagonal LuFeO3 and the effects of nonstoichiometry
DOI:10.1063/1.4861795  JN:APL MATERIALS  PY:2014
  TC:8  AU: Moyer, Jarrett A.;Misra, Rajiv;Mundy, Julia A.;Brooks, Charles M.;Heron, John T.;Muller, David A.;Schlom, Darrell G.;Schiffer, Peter;
7:5:6:26     Epitaxially Constrained Hexagonal Ferroelectricity and Canted Triangular Spin Order in LuFeO3 Thin Films
DOI:10.1021/cm300846j  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:14  AU: Jeong, Young Kyu;Lee, Jung-Hoon;Ahn, Suk-Jin;Jang, Hyun Myung;
7:5:6:27     Structure and magnetic properties of Y1-xLuxFeO3 (0 <= x <= 1) ceramics
DOI:10.1063/1.3691243  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Yuan, Xue-Ping;Tang, Yan-Kun;Sun, Yue;Xu, Ming-Xiang;
7:5:6:28     Anisotropy and extremely high coercivity in weak ferromagnetic LuFeO3
DOI:10.1063/1.3681789  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Zhu, Wenka;Pi, Li;Tan, Shun;Zhang, Yuheng;
7:5:6:29     Anomalous properties of hexagonal rare-earth ferrites from first principles
DOI:10.1103/PhysRevB.89.205122  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Xu, Changsong;Yang, Yurong;Wang, Shanying;Duan, Wenhui;Gu, Binglin;Bellaiche, L.;
7:5:6:30     Structural and magnetic properties in YFe0.8Mn0.2O3 ceramics
DOI:10.1016/j.matlet.2014.08.020  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Zhang, Chao;Wang, Zhaowu;Yan, Haitao;Wang, Xiaofei;Kang, Dawei;Li, Liben;
7:5:6:31     Spin dependent electrical abnormal in TbFeO3
DOI:10.1016/j.jallcom.2011.12.058  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Zou, Y. H.;Li, W. L.;Wang, S. L.;Zhu, H. W.;Li, P. G.;Tang, W. H.;
7:5:6:32     Multiferroism in hexagonally stabilized TmFeO3 thin films below 120 K
DOI:10.1039/c4tc00461b  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:1  AU: Ahn, Suk-Jin;Lee, Jung-Hoon;Jang, Hyun Myung;Jeong, Young Kyu;
7:5:6:33     Mechanisms of magnetic and temperature hysteresis in ErFeO3 and TmFeO3 single crystals
DOI:10.1063/1.3499616  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Tsymbal, L. T.;Bazaliy, Ya. B.;Kakazei, G. N.;Vasiliev, S. V.;
7:5:6:34     Structural and electronic origin of the magnetic structures in hexagonal LuFeO3 (vol 90, 014436, 2014)
DOI:10.1103/PhysRevB.90.059903  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Wang, Hongwei;Solovyev, Igor V.;Wang, Wenbin;Wang, Xiao;Ryan, Philip J.;Keavney, David J.;Kim, Jong-Woo;Ward, Thomas Z.;Zhu, Leyi;Shen, Jian;Cheng, X. M.;He, Lixin;Xu, Xiaoshan;Wu, Xifan;
7:5:6:35     Room-temperature ferromagnetism induced and controlled by electric field in BaNbO3 films
DOI:10.1063/1.4769901  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Cao, Ensi;Qin, Hongwei;Zhang, Yongjia;Hu, Jifan;
7:5:6:36     Correlation of magnetic ordering and electric polarization in multiferroic LuMn1-xFexO3 (0 <= x <= 0.2)
DOI:10.1063/1.3360355  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Lin, J. G.;Chen, Y. S.;Han, T. C.;
7:5:6:37     Local spin reversal and associated magnetic responses in Ga-substituted Pb-hexaferrites
DOI:10.1016/j.jmmm.2012.04.031  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Na, Eun Hye;Lee, Jung-Hoon;Ahn, Suk-Jin;Hong, Kun-Pyo;Koo, Yang Mo;Jang, Hyun Myung;
7:5:7:1     Direct Hydrothermal Synthesis and Physical Properties of Rare-Earth and Yttrium Orthochromite Perovskites
DOI:10.1021/cm102925z  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:45  AU: Sardar, Kripasindhu;Lees, Martin R.;Kashtiban, Reza J.;Sloan, Jeremy;Walton, Richard I.;
7:5:7:2     Magnetic exchange bias and high-temperature giant dielectric response in SmCrO3 ceramics
DOI:10.1016/j.ceramint.2014.05.115  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Huang, S.;Zerihun, G.;Tian, Z.;Yuan, S.;Gong, G.;Yin, C.;Wang, L.;
7:5:7:3     Spin-Reorientation, Ferroelectricity, and Magnetodielectric Effect in YFe1-xMnxO3(0.1 <= x <= 0.40)
DOI:10.1103/PhysRevLett.107.137202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:27  AU: Mandal, P.;Bhadram, Venkata Srinu;Sundarayya, Y.;Narayana, Chandrabhas;Sundaresan, A.;Rao, C. N. R.;
7:5:7:4     Phonon Raman scattering of RCrO3 perovskites (R = Y, La, Pr, Sm, Gd, Dy, Ho, Yb, Lu)
DOI:10.1103/PhysRevB.85.054303  JN:PHYSICAL REVIEW B  PY:2012
  TC:16  AU: Weber, M. C.;Kreisel, J.;Thomas, P. A.;Newton, M.;Sardar, K.;Walton, R. I.;
7:5:7:5     Magnetic and magnetocaloric properties of bulk dysprosium chromite
DOI:10.1063/1.4821016  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:9  AU: McDannald, A.;Kuna, L.;Jain, M.;
7:5:7:6     Field-induced polar order at the Neel temperature of chromium in rare-earth orthochromites: Interplay of rare-earth and Cr magnetism
DOI:10.1103/PhysRevB.86.214409  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;
7:5:7:7     Multiferroicity and magnetoelectric coupling enhanced large magnetocaloric effect in DyFe0.5Cr0.5O3
DOI:10.1063/1.4862665  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yin, L. H.;Yang, J.;Zhang, R. R.;Dai, J. M.;Song, W. H.;Sun, Y. P.;
7:5:7:8     Ferroelectricity Induced by Cations of Nonequivalent Spins Disordered in the Weakly Ferromagnetic Perovskites, YCr1-xMxO3 (M = Fe or Mn)
DOI:10.1021/cm301944s  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:15  AU: Rajeswaran, B.;Mandal, P.;Saha, Rana;Suard, E.;Sundaresan, A.;Rao, C. N. R.;
7:5:7:9     One-step hydrothermal synthesis, characterization and magnetic properties of orthorhombic PrCrO3 cubic particles
DOI:10.1016/j.materresbull.2014.07.049  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Zhang, Youjin;Yao, Chengpeng;Fan, Yun;Zhou, Maozhong;
7:5:7:10     Magnetic ordering in TbMn0.5Cr0.5O3 studied by neutron diffraction and first-principles calculations
DOI:10.1063/1.4890637  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Staruch, M.;Sharma, V.;dela Cruz, C.;Ramprasad, R.;Jain, M.;
7:5:7:11     Phonons and magnetic excitation correlations in weak ferromagnetic YCrO3
DOI:10.1063/1.4875099  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Sharma, Yogesh;Sahoo, Satyaprakash;Perez, William;Mukherjee, Somdutta;Gupta, Rajeev;Garg, Ashish;Chatterjee, Ratnamala;Katiyar, Ram S.;
7:5:7:12     A novel multiferroic system: Rare earth chromates
DOI:10.1063/1.3360358  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:12  AU: Cheng, Z. X.;Wang, X. L.;Dou, S. X.;Kimura, H.;Ozawa, K.;
7:5:7:13     Structural, magnetic, and magnetodielectric studies of metamagnetic DyFe0.5Cr0.5O3
DOI:10.1063/1.4870139  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Nair, Vidhya G.;Pal, L.;Subramanian, V.;Santhosh, P. N.;
7:5:7:14     General synthesis of rare-earth orthochromites with quasi-hollow nanostructures and their magnetic properties
DOI:10.1039/c3ta12281f  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2013
  TC:7  AU: Lei, Shuijin;Liu, Lei;Wang, Chunying;Wang, Chuanning;Guo, Donghai;Zeng, Suyuan;Cheng, Baochang;Xiao, Yanhe;Zhou, Lang;
7:5:7:15     Magnetic and dielectric properties and Raman spectroscopy of GdCrO3 nanoparticles
DOI:10.1063/1.3275926  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:20  AU: Jaiswal, Adhish;Das, Raja;Vivekanand, K.;Maity, Tuhin;Abraham, Priya Mary;Adyanthaya, Suguna;Poddar, Pankaj;
7:5:7:16     Magnetic structure and magnetodielectric effect of YFe0.5Cr0.5O3
DOI:10.1063/1.4808459  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Nair, Vidhya G.;Das, A.;Subramanian, V.;Santhosh, P. N.;
7:5:7:17     Intrinsic structural distortion and superexchange interaction in the orthorhombic rare-earth perovskites RCrO3
DOI:10.1103/PhysRevB.81.214115  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Zhou, J. -S.;Alonso, J. A.;Pomjakushin, V.;Goodenough, J. B.;Ren, Y.;Yan, J. -Q.;Cheng, J. -G.;
7:5:7:18     Structural and physical properties of microwave synthesized orthorhombic perovskite erbium chromite ErCrO3
DOI:10.1016/j.jeurceramsoc.2011.10.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Prado-Gonjal, Jesus;Schmidt, Rainer;Avila, David;Amador, Ulises;Moran, Emilio;
7:5:7:19     Observation of electric polarization reversal and magnetodielectric effect in orthochromites: A comparison between LuCrO3 and ErCrO3
DOI:10.1103/PhysRevB.89.144401  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Meher, K. R. S. Preethi;Wahl, Alexandre;Maignan, Antoine;Martin, Christine;Lebedev, Oleg I.;
7:5:7:20     Temperature dependence of magnetic properties and change of specific heat in perovskite ErCrO3 chromites
DOI:10.1007/s00339-010-5839-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:12  AU: Su, Yuling;Zhang, Jincang;Li, Li;Li, Beizhan;Zhou, Yun;Deng, Dongmei;Chen, Zhenping;Cao, Shixun;
7:5:7:21     Novel Magnetization Induced by Phase Coexistence in Multiferroic HoCrO3 Chromites
DOI:10.1080/00150193.2010.492729  JN:FERROELECTRICS  PY:2011
  TC:12  AU: Su, Y. L.;Zhang, J. C.;Li, L.;Feng, Z. J.;Li, B. Z.;Zhou, Y.;Cao, S. X.;
7:5:7:22     Structure, magnetic, and thermal properties of Nd1-xLaxCrO3 (0 <= x <= 1.0)
DOI:10.1063/1.3505800  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Du, Yi;Cheng, Zhen Xiang;Wang, Xiao-Lin;Dou, Shi Xue;
7:5:7:23     Dielectric and spin relaxation behaviour in DyFeO3 nanocrystals
DOI:10.1063/1.3669154  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Jaiswal, Adhish;Das, Raja;Maity, Tuhin;Poddar, Pankaj;
7:5:7:24     Crystalline and magnetic properties of Er and Yb chromites modified by Mn and Ca cations
DOI:10.1016/j.jeurceramsoc.2012.04.039  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Moure, C.;Tartaj, J.;Moure, A.;Pena, O.;
7:5:7:25     Magnetic Structure of LaCrO3 Perovskite under High Pressure from In Situ Neutron Diffraction
DOI:10.1103/PhysRevLett.106.057201  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:9  AU: Zhou, J. -S.;Alonso, J. A.;Muonz, A.;Fernandez-Diaz, M. T.;Goodenough, J. B.;
7:5:7:26     Abnormal high dielectric constant in SmFeO3 semiconductor ceramics
DOI:10.1016/j.materresbull.2011.06.001  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:15  AU: Prasad, Bandi Vittal;Rao, G. Narsinga;Chen, J. W.;Babu, D. Suresh;
7:5:7:27     Comparative Raman study of isostructural YCrO3 and YMnO3: Effects of structural distortions and twinning
DOI:10.1103/PhysRevB.83.224303  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Todorov, N. D.;Abrashev, M. V.;Ivanov, V. G.;Tsutsumanova, G. G.;Marinova, V.;Wang, Y. -Q.;Iliev, M. N.;
7:5:7:28     The dependence of magnetic properties on temperature for rare earth ErCrO3 chromites
DOI:10.1016/j.ceramint.2011.05.024  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Su, Yuling;Zhang, Jincang;Li, Beizhan;Kang, Baojuan;Yu, Qianying;Jing, Chao;Cao, Shixun;
7:5:7:29     Local symmetry breaking and spin-phonon coupling in SmCrO3 orthochromite
DOI:10.1016/j.jmmm.2014.02.057  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: El Amrani, M.;Zaghrioui, M.;Ta Phuoc, V.;Gervais, F.;Massa, Nestor E.;
7:5:7:30     Impedance and AC Conductivity of GdCr(1-x)CoxO(3) (x=0, 0.33, 0.5, 0.67 and 1) Perovskites
DOI:10.1111/jace.13205  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Pecovska-Gjorgjevich, Margareta;Aleksovska, Slobotka;Marinsek, Marjan;Dimitrovska-Lazova, Sandra;
7:5:7:31     Mild hydrothermal synthesis and physical property of perovskite Sr doped LaCrO3
DOI:10.1016/j.matlet.2013.03.083  JN:MATERIALS LETTERS  PY:2013
  TC:6  AU: Wang, Shan;Huang, Keke;Zheng, Beining;Zhang, Jiaqi;Feng, Shouhua;
7:5:7:32     Dielectric and optical phonon anomalies near antiferromagnetic ordering in LaCrO3: A possible near room temperature magnetodielectric system
DOI:10.1063/1.4824919  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Tiwari, Brajesh;Dixit, A.;Naik, R.;Lawes, G.;Rao, M. S. Ramachandra;
7:5:7:33     Hysteresis in magnetization-temperature curves of the orthochromite La0.1Gd0.9CrO3
DOI:10.1016/j.jallcom.2012.08.051  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Sharma, Neha;Srivastava, Bipin K.;Krishnamurthy, Anjali;Nigam, A. K.;
7:5:7:34     Low temperature neutron diffraction study of Nd1-xSrxCrO3 (0.05 <= x <= 0.15)
DOI:10.1016/j.jmmm.2014.02.018  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Chakraborty, Keka R.;Mukherjee, S.;Kaushik, S. D.;Rayaprol, S.;Prajapat, C. L.;Singh, M. R.;Siruguri, V.;Tyagi, A. K.;Yusuf, S. M.;
7:5:7:35     Synthesis and optical studies of GdCrO3 nanoparticles
DOI:10.1007/s11051-010-0090-4  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:5  AU: Jaiswal, Adhish;Das, Raja;Adyanthaya, Suguna;Poddar, Pankaj;
7:5:7:36     Relaxor ferroelectric like giant permittivity in PrCrO3 semiconductor ceramics
DOI:10.1016/j.matchemphys.2010.12.013  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:8  AU: Prasad, Bandi Vittal;Rao, G. Narsinga;Chen, J. W.;Babu, D. Suresh;
7:5:7:37     Size dependent structural and magnetic properties of Al substituted Co-Mg ferrites synthesized by the sol-gel auto-combustion method
DOI:10.1016/j.materresbull.2014.01.003  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:3  AU: Ahmad, Imran;Abbas, Tahir;Ziya, A. B.;Abbas, Ghazanfar;Maqsood, Asghari;
7:5:7:38     Magnetic and magnetocaloric properties of bulk dysprosium chromite (vol 114, 113904, 2013)
DOI:10.1063/1.4868220  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: McDannald, A.;Kuna, L.;Jain, M.;
7:5:7:39     Hydrothermally controlled growth and magnetic properties of multi-morphology manganese oxide (RMnO3, R = Ca, Sr, Ba) nano- and microcrystals
DOI:10.1016/j.jcrysgro.2013.06.008  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:1  AU: Zhang, Jinhua;Yu, Dabin;Du, Kai;Wang, Feng;Zhao, Dapeng;Wang, Yong;Chen, Leilei;Kong, Mingguang;Zou, Jiwei;
7:5:8:1     Ferroelectricity Induced by Spin-Dependent Metal-Ligand Hybridization in Ba2CoGe2O7
DOI:10.1103/PhysRevLett.105.137202  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:53  AU: Murakawa, H.;Onose, Y.;Miyahara, S.;Furukawa, N.;Tokura, Y.;
7:5:8:2     Enhanced Directional Dichroism of Terahertz Light in Resonance with Magnetic Excitations of the Multiferroic Ba2CoGe2O7 Oxide Compound
DOI:10.1103/PhysRevLett.106.057403  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:42  AU: Kezsmarki, I.;Kida, N.;Murakawa, H.;Bordacs, S.;Onose, Y.;Tokura, Y.;
7:5:8:3     Effect of spin excitations with simultaneous magnetic- and electric-dipole character on the static magnetoelectric properties of multiferroic materials
DOI:10.1103/PhysRevB.89.184419  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Szaller, David;Bordacs, Sandor;Kocsis, Vilmos;Room, Toomas;Nagel, Urmas;Kezsmarki, Istvan;
7:5:8:4     Evolution of two-dimensional antiferromagnetism with temperature and magnetic field in multiferroic Ba2CoGe2O7
DOI:10.1103/PhysRevB.89.064403  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Hutanu, V.;Sazonov, A. P.;Meven, M.;Roth, G.;Gukasov, A.;Murakawa, H.;Tokura, Y.;Szaller, D.;Bordacs, S.;Kezsmarki, I.;Guduru, V. K.;Peters, L. C. J. M.;Zeitler, U.;Romhanyi, J.;Nafradi, B.;
7:5:8:5     Comprehensive study of the ferroelectricity induced by the spin-dependent d-p hybridization mechanism in Ba2XGe2O7 (X = Mn, Co, and Cu)
DOI:10.1103/PhysRevB.85.174106  JN:PHYSICAL REVIEW B  PY:2012
  TC:12  AU: Murakawa, H.;Onose, Y.;Miyahara, S.;Furukawa, N.;Tokura, Y.;
7:5:8:6     Theoretical investigation of magnetoelectric effects in Ba2CoGe2O7
DOI:10.1103/PhysRevB.84.165137  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Yamauchi, Kunihiko;Barone, Paolo;Picozzi, Silvia;
7:5:8:7     Spontaneous toroidal moment and field-induced magnetotoroidic effects in Ba2CoGe2O7
DOI:10.1103/PhysRevB.84.094421  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Toledano, Pierre;Khalyavin, Dmitry D.;Chapon, Laurent C.;
7:5:8:8     Gigantic terahertz magnetochromism via electromagnons in the hexaferrite magnet Ba2Mg2Fe12O22
DOI:10.1103/PhysRevB.83.064422  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Kida, N.;Kumakura, S.;Ishiwata, S.;Taguchi, Y.;Tokura, Y.;
7:5:8:9     Theory of magneto-optical effects in helical multiferroic materials via toroidal magnon excitation
DOI:10.1103/PhysRevB.89.195145  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Miyahara, S.;Furukawa, N.;
7:5:8:10     Spin-Stretching Modes in Anisotropic Magnets: Spin-Wave Excitations in the Multiferroic Ba2CoGe2O7
DOI:10.1103/PhysRevLett.108.257203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:12  AU: Penc, K.;Romhanyi, J.;Room, T.;Nagel, U.;Antal, A.;Feher, T.;Janossy, A.;Engelkamp, H.;Murakawa, H.;Tokura, Y.;Szaller, D.;Bordacs, S.;Kezsmarki, I.;
7:5:8:11     Zero- and finite-temperature mean field study of magnetic field induced electric polarization in Ba2CoGe2O7: Effect of the antiferroelectric coupling
DOI:10.1103/PhysRevB.84.224419  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Romhanyi, Judit;Lajko, Miklos;Penc, Karlo;
7:5:8:12     Symmetry conditions for nonreciprocal light propagation in magnetic crystals
DOI:10.1103/PhysRevB.87.014421  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Szaller, David;Bordacs, Sandor;Kezsmarki, Istvan;
7:5:8:13     Crystal growth and characterization of the non-centrosymmetric antiferromagnet Ba2CuGe2O7
DOI:10.1016/j.jcrysgro.2014.07.022  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:2  AU: Fittipaldi, R.;Rocco, L.;Hatnean, M. Ciomaga;Granata, V.;Lees, M. R.;Balakrishnan, G.;Vecchione, A.;
7:5:8:14     Symmetry and structure of multiferroic Ba2CoGe2O7
DOI:10.1103/PhysRevB.84.212101  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Hutanu, V.;Sazonov, A.;Murakawa, H.;Tokura, Y.;Nafradi, B.;Chernyshov, D.;
7:5:8:15     Determination of the magnetic order and the crystal symmetry in the multiferroic ground state of Ba2CoGe2O7
DOI:10.1103/PhysRevB.86.104401  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Hutanu, V.;Sazonov, A.;Meven, M.;Murakawa, H.;Tokura, Y.;Bordacs, S.;Kezsmarki, I.;Nafradi, B.;
7:5:8:16     Terahertz Magnetoelectric Resonance Enhanced by Mutual Coupling of Electromagnons
DOI:10.1103/PhysRevLett.111.037204  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:7  AU: Takahashi, Y.;Yamasaki, Y.;Tokura, Y.;
7:5:8:17     Multiferroic properties of an akermanite Sr2CoSi2O7 single crystal in high magnetic fields
DOI:10.1103/PhysRevB.86.060413  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Akaki, M.;Iwamoto, H.;Kihara, T.;Tokunaga, M.;Kuwahara, H.;
7:5:8:18     Thermodynamics of ferrotoroidic materials: Toroidocaloric effect
DOI:10.1103/PhysRevB.85.144429  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Castan, Teresa;Planes, Antoni;Saxena, Avadh;
7:5:8:19     Infrared phonon spectrum of the tetragonal helimagnet Ba2CuGe2O7
DOI:10.1103/PhysRevB.90.014304  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Nucara, A.;Mohamed, W. S.;Baldassarre, L.;Koval, S.;Lorenzana, J.;Fittipaldi, R.;Balakrishnan, G.;Vecchione, A.;Calvani, P.;
7:5:8:20     Giant gigahertz optical activity in multiferroic ferroborate
DOI:10.1103/PhysRevB.89.174407  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kuzmenko, A. M.;Shuvaev, A.;Dziom, V.;Pimenov, Anna;Schiebl, M.;Mukhin, A. A.;Ivanov, V. Yu.;Bezmaternykh, L. N.;Pimenov, A.;
7:5:8:21     Electric Field Control of Terahertz Polarization in a Multiferroic Manganite with Electromagnons
DOI:10.1103/PhysRevLett.111.227201  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Shuvaev, A.;Dziom, V.;Pimenov, Anna;Schiebl, M.;Mukhin, A. A.;Komarek, A. C.;Finger, T.;Braden, M.;Pimenov, A.;
7:5:8:22     Spin-Nematic Interaction in the Multiferroic Compound Ba2CoGe2O7
DOI:10.1103/PhysRevLett.112.127205  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:2  AU: Soda, M.;Matsumoto, M.;Mansson, M.;Ohira-Kawamura, S.;Nakajima, K.;Shiina, R.;Masuda, T.;
7:5:8:23     A system exhibiting toroidal order
DOI:10.1103/PhysRevB.82.184401  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Harris, A. B.;
7:5:8:24     Weak magnetism in insulating and superconducting cuprates
DOI:10.1103/PhysRevB.82.214504  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: De Luca, G. M.;Ghiringhelli, G.;Moretti Sala, M.;Di Matteo, S.;Haverkort, M. W.;Berger, H.;Bisogni, V.;Cezar, J. C.;Brookes, N. B.;Salluzzo, M.;
7:5:8:25     Magnetic control of electric polarization in the noncentrosymmetric compound (Cu, Ni)B2O4
DOI:10.1103/PhysRevB.87.184416  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Khanh, N. D.;Abe, N.;Kubo, K.;Akaki, M.;Tokunaga, M.;Sasaki, T.;Arima, T.;
7:5:8:26     Multiboson spin-wave theory for Ba2CoGe2O7: A spin-3/2 easy-plane Neel antiferromagnet with strong single-ion anisotropy
DOI:10.1103/PhysRevB.86.174428  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;Unusual temperature dependence of the spectral weight near the Fermi;level of NdNiO3 thin films;PHYSICAL REVIEW B;86;19;195147;10.1103/PhysRevB.86.195147;NOV 30 2012;2012;We investigate the behavior of the spectral weight near the Fermi level;of NdNiO3 thin films as a function of temperature across the;metal-to-insulator transition (MIT) by means of ultraviolet;photoelectron spectroscopy. The spectral weight was found to exhibit;thermal hysteresis, similar to that of the dc conductivity. A detailed;analysis of the temperature dependence reveals two distinct regimes of;spectral loss close to the Fermi level. The temperature evolution of one;regime is found to be independent of the MIT.;Garcia-Fernandez, Mirian/B-6018-2013; Zubko, Pavlo/B-5496-2009;Zubko, Pavlo/0000-0002-7330-3163;2;0;0;0;2;1098-0121;WOS:000311715000006;;;J;Sen, Arnab;Damle, Kedar;Moessner, R.;Vacancy-induced spin textures and their interactions in a classical spin;liquid;PHYSICAL REVIEW B;86;20;205134;10.1103/PhysRevB.86.205134;NOV 30 2012;2012;Motivated by experiments on the archetypal frustrated magnet;SrCr9pGa12-9pO19 (SCGO), we study the classical Heisenberg model on the;pyrochlore slab (kagome bilayer) lattice with site dilution x = 1 - p.;This allows us to address generic aspects of the physics of nonmagnetic;vacancies in a classical spin liquid. We explicitly demonstrate that the;pure (x = 0) system remains a spin liquid down to the lowest;temperatures, with an unusual nonmonotonic temperature dependence of the;susceptibility, which even turns diamagnetic for the apical spins;between the two kagome layers. For x > 0 but small, the low-temperature;magnetic response of the system is most naturally described in terms of;the properties of spatially extended spin textures that cloak an;"orphan" S = 3/2 Cr3+ spin in direct proximity to a pair of missing;sites belonging to the same triangular simplex. In the T -> 0 limit,;these orphan-texture complexes each carry a net magnetization that is;exactly half the magnetic moment of an individual spin of the undiluted;system. Furthermore, we demonstrate that they interact via an entropic;temperature-dependent pairwise exchange interaction J(eff) (T,(r) over;right arrow) similar to T J ((r) over right arrow root T) that has a;logarithmic form at short distances and decays exponentially beyond a;thermal correlation length xi(T) similar to 1/root T. The sign of J(eff);depends on whether the two orphan spins belong to the same kagome layer;or not. We provide a detailed analytical account of these properties;using an effective field theory approach specifically tailored for the;problem at hand. These results are in quantitative agreement with;large-scale Monte Carlo numerics.;3;1;0;0;3;1098-0121;WOS:000311715100008;;;J;Solanki, Ravindra Singh;Mishra, S. K.;Senyshyn, Anatoliy;Ishii, I.;Moriyoshi, Chikako;Suzuki, Takashi;Kuroiwa, Yoshihiro;Pandey, Dhananjai;Antiferrodistortive phase transition in pseudorhombohedral;(Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and;neutron powder diffraction study;PHYSICAL REVIEW B;86;17;174117;10.1103/PhysRevB.86.174117;NOV 30 2012;2012;The controversies about the structure of the true ground state of;pseudorhombohedral compositions of Pb(ZrxTi1-x)O-3 (PZT) are addressed;using a 6% Sr2+ substituted sample with x = 0.550. Sound velocity;measurements reveal a phase transition at T-c similar to 279 K. The;temperature dependence of full width at half maximum of (h00)(pc) peaks;and the unit cell volume also show anomalies around 279 K even though;there is no indication of any change of space group in the synchrotron;x-ray powder diffraction (SXRD) patterns. The neutron powder diffraction;patterns reveal appearance of superlattice peaks below T-c similar to;279 K, confirming the existence of an antiferrodistortive phase;transition. The Rietveld analysis of the room-temperature and;low-temperature SXRD data below T-c shows that the structure corresponds;to single monoclinic phase in the Cm space group while the analysis of;neutron powder diffraction data reveals that the structure of the;ground-state phase below T-c corresponds to the Cc space group. Our;analysis shows that the structural models for the ground-state phase;based on the R3c space group with or without the coexistence of the;room-temperature monoclinic phase in the Cm space group can be rejected.;SOLANKI, RAVINDRA /H-7221-2013; Senyshyn, Anatoliy/C-8267-2014;Senyshyn, Anatoliy/0000-0002-1473-8992;3;0;0;0;3;1098-0121;WOS:000311714600001;;;J;Steinke, N. -J.;Moore, T. A.;Mansell, R.;Bland, J. A. C.;Barnes, C. H. W.;Nonuniversal dynamic magnetization reversal in the Barkhausen-dominated;and mesofrequency regimes;PHYSICAL REVIEW B;86;18;184434;10.1103/PhysRevB.86.184434;NOV 30 2012;2012;Dynamic magnetization reversal in the mesofrequency range is studied by;ac magneto-optical Kerr effect (ac-MOKE) and ac anisotropic;magnetoresistance (ac-AMR) magnetometry in a series of epitaxial and;polycrystalline thin magnetic films. The dynamic coercive field was;found to scale as a power law with scaling exponents <= 1/2 depending on;the ferromagnetic material. In addition, there is a low sweep rate;regime in which the dynamic coercivity reaches a minimum. These findings;are explained in the context of reversal proceeding by motion of a few;domain walls (similar to 1). At dc and low field sweep rates the;reversal proceeds between local pinning sites via Barkhausen avalanches;and the overall reversal speed is strongly dependent on the field sweep;rate. At higher field sweep rates a continuous motion regime is entered;in which the reversal velocity depends linearly on the applied field;sweep rate and only an average pinning force is experienced by the wall.;The fit of the dynamic coercivity vs applied field sweep rate allows the;determination of the average nonlocal pinning field. The nonuniversal;scaling exponent can be explained using recently developed models and;introducing a field rate-dependent number of active domain walls.;Mansell, Rhodri/A-1450-2013;2;0;0;0;2;1098-0121;WOS:000311714700003;;;J;Stoffel, M.;Fagot-Revurat, Y.;Tejeda, A.;Kierren, B.;Nicolaou, A.;Le Fevre, P.;Bertran, F.;Taleb-Ibrahimi, A.;Malterre, D.;Electron-phonon coupling on strained Ge/Si(111)-(5x5) surfaces;PHYSICAL REVIEW B;86;19;195438;10.1103/PhysRevB.86.195438;NOV 30 2012;2012;We investigate the structural and electronic properties of strained;Ge/Si(111)-(5 x 5) surfaces by means of scanning tunneling microscopy;and high-resolution angle-resolved photoemission spectroscopy. The;homogeneous (5 x 5) reconstructed overlayers are characterized by three;electronic surface states, similar to the Si(111)-(7 x 7) surface. The;dispersion of the dangling bond related surface state exhibits the same;periodicity as that of the (5 x 5) reconstruction. Moreover, a careful;analysis of the shape and width of this surface state provides striking;evidence of electron-phonon coupling at low temperatures. By considering;the spectral function within a simple Debye model, we determine both the;Debye energy and the electron-phonon coupling strength. The latter value;is further confirmed by analyzing the temperature-dependent phonon;broadening of the dangling bond related surface state linewidth.;BERTRAN, Francois/B-7515-2008; Tejeda, Antonio/C-4711-2014;BERTRAN, Francois/0000-0002-2416-0514; Tejeda,;Antonio/0000-0003-0125-4603;1;0;0;0;1;1098-0121;WOS:000311715000012;;;J;Turek, I.;Kudrnovsky, J.;Carva, K.;Magnetic anisotropy energy of disordered tetragonal Fe-Co systems from;ab initio alloy theory;PHYSICAL REVIEW B;86;17;174430;10.1103/PhysRevB.86.174430;NOV 30 2012;2012;We present results of systematic fully relativistic first-principles;calculations of the uniaxial magnetic anisotropy energy (MAE) of a;disordered and partially ordered tetragonal Fe-Co alloy using the;coherent potential approximation (CPA). This alloy has recently become a;promising system for thin ferromagnetic films with a perpendicular;magnetic anisotropy. We find that existing theoretical approaches to;homogeneous random bulk Fe-Co alloys, based on a simple virtual crystal;approximation (VCA), overestimate the maximum MAE values obtained in the;CPA by a factor of 4. This pronounced difference is ascribed to the;strong disorder in the minority spin channel of real alloys, which is;neglected in the VCA and which leads to a broadening of the d-like;eigenstates at the Fermi energy and to the reduction of the MAE. The;ordered Fe-Co alloys with a maximum L1(0)-like atomic long-range order;can exhibit high values of the MAE, which, however, get dramatically;reduced by small perturbations of the perfect order.;Carva, Karel/A-3703-2008; Turek, Ilja/G-5553-2014; KUDRNOVSKY, Josef/G-5581-2014;KUDRNOVSKY, Josef/0000-0002-9968-6748;10;0;0;0;10;1098-0121;WOS:000311714600004;;;J;Uppstu, Andreas;Harju, Ari;High-field magnetoresistance revealing scattering mechanisms in graphene;PHYSICAL REVIEW B;86;20;201409;10.1103/PhysRevB.86.201409;NOV 30 2012;2012;We show that the type of charge carrier scattering significantly affects;the high-field magnetoresistance of graphene nanoribbons. This effect;has the potential to be used in identifying the scattering mechanisms in;graphene. The results also provide an explanation for the experimentally;found, intriguing differences in the behavior of the magnetoresistance;of graphene Hall bars placed on different substrates. Additionally, our;simulations indicate that the peaks in the longitudinal resistance tend;to become pinned to fractionally quantized values, as different;transport modes have very different scattering properties.;Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;1;0;0;0;1;1098-0121;WOS:000311715100004;;;J;White, Alexander J.;Sukharev, Maxim;Galperin, Michael;Molecular nanoplasmonics: Self-consistent electrodynamics in;current-carrying junctions;PHYSICAL REVIEW B;86;20;205324;10.1103/PhysRevB.86.205324;NOV 30 2012;2012;We consider a biased molecular junction subjected to an external;time-dependent electromagnetic field. We discuss local field formation;due to both surface plasmon-polariton excitations in the contacts and;the molecular response. Employing realistic parameters we demonstrate;that such self-consistent treatment is crucial for the proper;description of the junction transport characteristics.;White, Alexander/D-8754-2014;White, Alexander/0000-0002-7771-3899;3;0;0;0;3;1098-0121;WOS:000311715100010;;;J;Wierschem, Keola;Kato, Yasuyuki;Nishida, Yusuke;Batista, Cristian D.;Sengupta, Pinaki;Magnetic and nematic orderings in spin-1 antiferromagnets with;single-ion anisotropy;PHYSICAL REVIEW B;86;20;201108;10.1103/PhysRevB.86.201108;NOV 30 2012;2012;We study a spin-1 Heisenberg model with exchange interaction J, uniaxial;single-ion exchange anisotropy D, and Zeeman coupling to a magnetic;field B parallel to the symmetry axis. We compute the (D/J, B/J) quantum;phase diagram for square and simple cubic lattices by combining;analytical and quantum Monte Carlo approaches, and find a transition;between XY antiferromagnetic and ferronematic phases that spontaneously;break the U(1) symmetry of the model. In the language of bosonic gases,;this is a transition between a Bose-Einstein condensate (BEC) of single;bosons and a BEC of pairs. Our work opens up new avenues for measuring;this transition in real magnets.;8;0;0;0;8;1098-0121;WOS:000311715100001;;;J;Wu, Chien-Te;Valls, Oriol T.;Halterman, Klaus;Proximity effects in conical-ferromagnet/superconductor bilayers;PHYSICAL REVIEW B;86;18;184517;10.1103/PhysRevB.86.184517;NOV 30 2012;2012;We present a study of various aspects of proximity effects in F/S;(ferromagnet/superconductor) bilayers, where F has a spiral magnetic;texture such as that found in holmium, erbium, and other materials, and;S is a conventional s-wave superconductor. We numerically solve the;Bogoliubov-de Gennes (BdG) equations self-consistently and use the;solutions to compute physical quantities relevant to the proximity;effects in these bilayers. We obtain the relation between the;superconducting transition temperature T-c and the thicknesses d(F) of;the magnetic layer by solving the linearized BdG equations. We find that;the T-c (d(F)) curves include multiple oscillations. Moreover, the;system may be reentrant not only with d(F), as is the case when the;magnet is uniform, but also with temperature T : the superconductivity;disappears in certain ranges of d(F) or T. The T reentrance reported;here occurs when d(F) is larger than the spatial period of the conical;exchange field. We compute the condensation free energies and entropies;from the full BdG equations and find the results are in agreement with;T-c values obtained by linearization. The inhomogeneous nature of the;magnet makes it possible for all odd triplet pairing components to be;induced. We have investigated their properties and found that, as;compared to the singlet amplitude, both the m = 0 and +/- 1 triplet;components exhibit long-range penetration. For nanoscale bilayers, the;proximity lengths for both layers are also obtained. These lengths;oscillate with d(F) and they are found to be long range on both sides.;These results are shown to be consistent with recent experiments. We;also calculate the reverse proximity effect described by the;three-dimensional local magnetization, and the local density of states,;which reveals important energy-resolved signatures associated with the;proximity effects.;6;0;0;0;6;1098-0121;WOS:000311714700005;;;J;Altarelli, M.;Kurta, R. P.;Vartanyants, I. A.;X-ray cross-correlation analysis and local symmetries of disordered;systems: General theory (vol 82, 104207, 2010);PHYSICAL REVIEW B;86;17;179904;10.1103/PhysRevB.86.179904;NOV 29 2012;2012;1;0;0;0;1;1098-0121;WOS:000311693600006;;;J;Beheshtian, J.;Sadeghi, A.;Neek-Amal, M.;Michel, K. H.;Peeters, F. M.;Induced polarization and electronic properties of carbon-doped boron;nitride nanoribbons;PHYSICAL REVIEW B;86;19;195433;10.1103/PhysRevB.86.195433;NOV 29 2012;2012;The electronic properties of boron nitride nanoribbons (BNNRs) doped;with a line of carbon atoms are investigated using density functional;calculations. By replacing a line of alternating B and N atoms with;carbons, three different configurations are possible depending on the;type of the atoms which bond to the carbons. We found very different;electronic properties for these configurations: (i) the NCB arrangement;is strongly polarized with a large dipole moment having an unexpected;direction, (ii) the BCB and NCN arrangements are nonpolar with zero;dipole moment, (iii) the doping by a carbon line reduces the band gap;regardless of the local arrangement of the borons and the nitrogens;around the carbon line, and (iv) the polarization and energy gap of the;carbon-doped BNNRs can be tuned by an electric field applied parallel to;the carbon line. Similar effects were found when either an armchair or;zigzag line of carbon was introduced.;Sadeghi, Ali/D-1554-2013;8;0;0;0;8;1098-0121;WOS:000311694200006;;;J;Chi, Hang;Kim, Hyoungchul;Thomas, John C.;Su, Xianli;Stackhouse, Stephen;Kaviany, Massoud;Van der Ven, Anton;Tang, Xinfeng;Uher, Ctirad;Configuring pnicogen rings in skutterudites for low phonon conductivity;PHYSICAL REVIEW B;86;19;195209;10.1103/PhysRevB.86.195209;NOV 29 2012;2012;Dominant heat-carrying modes in skutterudites are associated with;vibrations of the pnicogen rings. Apart from filling the structural;cages with foreign species, disrupting the pnicogen ring structure by;substitutional alloying should be an effective approach to reduce;thermal conductivity. In this paper we explore alloying configurations;of pnicogen rings (Sb rings in the case of CoSb3) that yield;particularly low values of the thermal conductivity. We find that IV-VI;double substitution (replacing two Sb atoms with one atom each from the;column IV and column VI elements to achieve an average charge of two Sb;atoms) is a very effective approach. Our ab initio calculations, in;combination with a cluster expansion, have allowed us to identify stable;alloy configurations on the Sb rings. Subsequent molecular and lattice;dynamics simulations on low energy configurations establish the range of;atomic displacement parameters and values of the thermal conductivity.;Theoretical results are in good agreement with our experimental thermal;conductivity values. Combining both approaches of compensated double;substitution and filling of structural cages should be an effective way;of improving the thermoelectric figure of merit of skutterudites.;Su, Xianli/A-9685-2012; Chi, Hang/F-1537-2011; Thomas, John/A-2764-2009; Kim, Hyoungchul/F-2557-2014;Chi, Hang/0000-0002-1299-1150; Thomas, John/0000-0002-3162-0152; Kim,;Hyoungchul/0000-0003-3109-660X;8;0;0;0;8;1098-0121;WOS:000311694200003;;;J;Fortmann, C.;Niemann, C.;Glenzer, S. H.;Theory of x-ray scattering in high-pressure electrides;PHYSICAL REVIEW B;86;17;174116;10.1103/PhysRevB.86.174116;NOV 29 2012;2012;We report on a theoretical model for the calculation of x-ray scattering;from high-pressure electrides. By treating interstitial electrons as;effective anions forming a sublattice within the crystal, we explicitly;account for Bragg reflections from the sublattice as well as for;scattering interferences between the ion lattice and the anion;sublattice. The additional reflections and interferences lead to;significant modifications of the static structure factor as compared to;the pure lattices. Our results are important for accurate calculations;of material properties in the high-pressure phase and allow for direct;experimental verification of electride phases in matter at ultrahigh;pressures through angle-resolved x-ray scattering.;2;0;0;0;2;1098-0121;WOS:000311693600001;;;J;Guclu, Caner;Campione, Salvatore;Capolino, Filippo;Hyperbolic metamaterial as super absorber for scattered fields generated;at its surface;PHYSICAL REVIEW B;86;20;205130;10.1103/PhysRevB.86.205130;NOV 29 2012;2012;We show that hyperbolic metamaterials (HMs) that exhibit hyperbolic;wave-vector dispersion diagrams possess two important features related;to super absorption: The total power scattered by a nanosphere is (i);greatly enhanced when placed at the HM surface, compared to other;material surfaces, and (ii) almost totally directed into the HM. We show;that these two features are peculiar of HM interfaces, and we support;them using a spectral theory study of transverse-electric and magnetic;waves scattered by a subwavelength nanosphere. We analyze the;nanosphere's scattered power absorbed by various substrate;configurations. We also consider various nanosphere materials.;22;0;0;0;22;1098-0121;WOS:000311694300002;;;J;Hebbache, M.;Entanglement of electron spins and geometric phases in the diamond color;center coupled to the P1 center;PHYSICAL REVIEW B;86;19;195316;10.1103/PhysRevB.86.195316;NOV 29 2012;2012;Impurity spins in semiconductors are potential quantum bits.;Entanglement and topological phases are key resources in quantum;computation. We prove that the coupled electron spins carried by a;diamond nitrogen-vacancy color center (NV-) and a single substitutional;nitrogen impurity (P1 center) are entangled in the immediate vicinity of;the level anticrossing that appears in the Zeeman energy diagram at;about 500 G. We also determine the Aharonov-Anandan, Berry, and marginal;geometric phases that can be accumulated by the state vectors of this;spin system when it is magnetically transported around a closed path. At;the resonance where the gap between two energy levels is minimum, the;geometric phases undergo discontinuities, and the entanglement of the;two electron spins is maximal.;2;0;0;0;2;1098-0121;WOS:000311694200004;;;J;Kerdsongpanya, Sit;Alling, Bjorn;Eklund, Per;Effect of point defects on the electronic density of states of ScN;studied by first-principles calculations and implications for;thermoelectric properties;PHYSICAL REVIEW B;86;19;195140;10.1103/PhysRevB.86.195140;NOV 29 2012;2012;We have investigated the effect of defects and impurities on the;electronic density of states of scandium nitride using first-principles;calculations with the generalized gradient approximation and hybrid;functionals for the exchange correlation energy. Our results show that;Sc and N vacancies can introduce asymmetric peaks in the density of;states close to the Fermi level. We also find that the N vacancy states;are sensitive to total electron concentration of the system due to their;possibility for spin polarization. Substitutional point defects shift;the Fermi level in the electronic band according to their valence but do;not introduce sharp features. The energetics and electronic structure of;defect pairs are also studied. By using hybrid functional calculations,;a correct description of the band gap of scandium nitride is obtained.;Our results envisage ways for improving the thermoelectric figure of;merit of ScN by electronic structure engineering through stoichiometry;tuning and doping.;Eklund, Per/B-7677-2011; Alling, Bjorn/I-3193-2012;Eklund, Per/0000-0003-1785-0864; Alling, Bjorn/0000-0001-5863-5605;8;0;0;0;8;1098-0121;WOS:000311694200001;;;J;Kim, Jiseok;Fischetti, Massimo V.;Aboud, Shela;Structural, electronic, and transport properties of silicane nanoribbons;PHYSICAL REVIEW B;86;20;205323;10.1103/PhysRevB.86.205323;NOV 29 2012;2012;Silicane ribbons do not suffer from aromatic dependence of the band gap;making them a more promising candidate for near-term nanoelectronic;application compared to armchair graphene nanoribbons. The structural,;electronic, and transport properties of free-standing sp(3)-hybridized;armchair- and zigzag-edge silicane nanoribbons have been investigated;using ab initio and nonlocal empirical pseudopotential calculations.;Under ambient conditions, two-dimensional silicane sheets will;spontaneously break into stable one-dimensional ribbons similar to;density functional theory studies of graphene ribbons. The calculated;low-field electron mobility and ballistic conductance show a strong edge;dependence, due to differences in the effective mass and momentum;relaxation rates along the two transport directions. The mobility in;zigzag-edge ribbons is found to be approximately twenty times higher;than in armchair-edge ribbons.;7;0;0;0;7;1098-0121;WOS:000311694300004;;;J;Kim, Kyou-Hyun;Payne, David A.;Zuo, Jian-Min;Symmetry of piezoelectric (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (x=0.31);single crystal at different length scales in the morphotropic phase;boundary region;PHYSICAL REVIEW B;86;18;184113;10.1103/PhysRevB.86.184113;NOV 29 2012;2012;We use probes of three different length scales to examine symmetry of (1;- x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) single crystals in the;morphotropic phase boundary (MPB) region at composition x = 0.31;(PMN-31% PT). On the macroscopic scale, x-ray diffraction (XRD) shows a;mixture of strong and weak diffraction peaks of different widths. The;closest match to XRD peak data is made with monoclinic Pm (M-C);symmetry. On the local scale of a few nanometers, convergent beam;electron diffraction (CBED) studies, with a 1.6-nm electron probe,;reveal no obvious symmetry. These CBED experimental patterns can be;approximately matched with simulations based on monoclinic symmetry,;which suggests locally distorted monoclinic structure. A monoclinic Cm;(M-A or M-B)-like symmetry could also be obtained from certain regions;of the crystal by using a larger electron probe size of several tens of;nanometers in diameter. Thus the monoclinic symmetry of single crystal;PMN-31% PT is developed only in parts of the crystal by averaging over;locally distorted structure on the scale of few tens of nanometers. The;macroscopic symmetry observed by XRD is a result of averaging from the;local structure in PMN-31% PT single crystal. The lack of local symmetry;at a few nanometers scale suggests that the polarization switching;results from a change in local displacements, which are not restricted;to specific symmetry planes or directions.;2;0;0;0;2;1098-0121;WOS:000311693900002;;;J;Kossacki, P.;Faugeras, C.;Kuehne, M.;Orlita, M.;Mahmood, A.;Dujardin, E.;Nair, R. R.;Geim, A. K.;Potemski, M.;Circular dichroism of magnetophonon resonance in doped graphene;PHYSICAL REVIEW B;86;20;205431;10.1103/PhysRevB.86.205431;NOV 29 2012;2012;The polarization-resolved Raman-scattering response due to E-2g phonons;in monolayer graphene has been investigated in magnetic fields up to 29;T. The hybridization of the E-2g phonon is only observed with the;fundamental inter-Landau-level excitation (involving the n = 0 Landau;level) and in just one of the two configurations of the circularly;cross-polarized excitation and scattered light. This polarization;anisotropy of the magnetophonon resonance is shown to be inherent to;relatively strongly doped graphene samples with carrier concentrations;typical for graphene deposited on Si/SiO2 substrates.;Dujardin, Erik/A-2748-2010; Raveendran Nair, Rahul/G-5839-2010; Orlita, Milan/H-1130-2014;Dujardin, Erik/0000-0001-7242-9250;;3;0;0;0;3;1098-0121;WOS:000311694300005;;;J;Kostylev, M.;Stashkevich, A. A.;Roussigne, Y.;Grigoryeva, N. A.;Mistonov, A. A.;Menzel, D.;Sapoletova, N. A.;Napolskii, K. S.;Eliseev, A. A.;Lukashin, A. V.;Grigoriev, S. V.;Samarin, S. N.;Microwave properties of Ni-based ferromagnetic inverse opals;PHYSICAL REVIEW B;86;18;184431;10.1103/PhysRevB.86.184431;NOV 29 2012;2012;Investigations of microwave properties of Ni-based inverse ferromagnetic;opal-like film with the [111] axis of the fcc structure along the normal;direction to the film have been carried out in the 2-18 GHz frequency;band. We observed multiple spin wave resonances for the magnetic field;applied perpendicular to the film, i.e., along the [111] axis of this;artificial crystal. For the field applied in the film plane, a broad;band of microwave absorption is observed, which does not contain a fine;structure. The field ranges of the responses observed are quite;different for these two magnetization directions. This suggests a;collective magnetic ground state or shape anisotropy and collective;microwave dynamics for this foam-like material. This result is in;agreement with SQUID measurements of hysteresis loops for the material.;Two different models for this collective behavior are suggested that;satisfactorily explain the major experimental results.;Lukashin, Alexey/F-6746-2013; Mistonov, Alexander/H-2098-2013; Grigoryeva, Natalia/K-2253-2013; Kostylev, Mikhail/H-5214-2014;Mistonov, Alexander/0000-0003-0138-3579; Grigoryeva,;Natalia/0000-0002-9910-6192;;1;0;0;0;1;1098-0121;WOS:000311693900004;;;J;Kvashnin, Y. O.;Khmelevskyi, S.;Kudrnovsky, J.;Yaresko, A. N.;Genovese, L.;Bruno, P.;Noncollinear magnetic ordering in compressed FePd3 ordered alloy: A;first principles study;PHYSICAL REVIEW B;86;17;174429;10.1103/PhysRevB.86.174429;NOV 29 2012;2012;By means of ab initio calculations based on the density functional;theory we investigated the magnetic phase diagram of ordered FePd3 alloy;as a function of external pressure. Considering several magnetic;configurations we concluded that the system under pressure has a;tendency toward noncollinear spin alignment. Analysis of the Heisenberg;exchange parameters J(ij) revealed strong dependence of iron-iron;magnetic couplings on polarization of Pd atoms. To take into account;that effect we built an extended Heisenberg model with higher order;(biquadratic) terms. Minimizing the energy of this Hamiltonian, fully;parametrized using the results of ab initio calculations, we found a;candidate for a ground state of compressed FePd3, which can be seen as;two interpenetrating "triple-Q" phases.;Genovese, Luigi/C-5937-2011; Bruno, Patrick/C-9159-2009; KUDRNOVSKY, Josef/G-5581-2014;Genovese, Luigi/0000-0003-1747-0247; Bruno, Patrick/0000-0002-2574-1943;;KUDRNOVSKY, Josef/0000-0002-9968-6748;1;0;0;0;1;1098-0121;WOS:000311693600004;;;J;Li, Wu;Lindsay, L.;Broido, D. A.;Stewart, Derek A.;Mingo, Natalio;Thermal conductivity of bulk and nanowire Mg2SixSn1-x alloys from first;principles;PHYSICAL REVIEW B;86;17;174307;10.1103/PhysRevB.86.174307;NOV 29 2012;2012;The lattice thermal conductivity (kappa) of the thermoelectric;materials, Mg2Si, Mg2Sn, and their alloys, are calculated for bulk and;nanowires, without adjustable parameters. We find good agreement with;bulk experimental results. For large nanowire diameters, size effects;are stronger for the alloy than for the pure compounds. For example, in;200 nm diameter nanowires kappa is lower than its bulk value by 30%,;20%, and 20% for Mg2Si0.6Sn0.4, Mg2Si, and Mg2Sn, respectively. For;nanowires less than 20 nm thick, the relative decrease surpasses 50%,;and it becomes larger in the pure compounds than in the alloy. At room;temperature, kappa of Mg2SixSn1-x is less sensitive to nanostructuring;size effects than SixGe1-x, but more sensitive than PbTexSe1-x. This;suggests that further improvement of Mg2SixSn1-x as a nontoxic;thermoelectric may be possible.;Lindsay, Lucas/C-9221-2012; Stewart, Derek/B-6115-2008;25;1;0;0;25;1098-0121;WOS:000311693600002;;;J;Niklasson, Anders M. N.;Cawkwell, Marc J.;Fast method for quantum mechanical molecular dynamics;PHYSICAL REVIEW B;86;17;174308;10.1103/PhysRevB.86.174308;NOV 29 2012;2012;As the processing power available for scientific computing grows,;first-principles Born-Oppenheimer molecular dynamics simulations are;becoming increasingly popular for the study of a wide range of problems;in materials science, chemistry, and biology. Nevertheless, the;computational cost of Born-Oppenheimer molecular dynamics still remains;prohibitively large for many potential applications. Here we show how to;avoid a major computational bottleneck: the self-consistent-field;optimization prior to force calculations. The optimization-free quantum;mechanical molecular dynamics method gives trajectories that are almost;indistinguishable from an "exact" microcanonical Born-Oppenheimer;molecular dynamics simulation even when low-prefactor linear scaling;sparse matrix algebra is used. Our findings show that the computational;gap between classical and quantum mechanical molecular dynamics;simulations can be significantly reduced.;4;0;0;0;4;1098-0121;WOS:000311693600003;;;J;Ong, Zhun-Yong;Fischetti, Massimo V.;Theory of interfacial plasmon-phonon scattering in supported graphene;(vol 86, 165422, 2012);PHYSICAL REVIEW B;86;19;199904;10.1103/PhysRevB.86.199904;NOV 29 2012;2012;Ong, Zhun-Yong/B-9486-2013;Ong, Zhun-Yong/0000-0003-2668-6453;6;0;0;0;6;1098-0121;WOS:000311694200007;;;J;Per, Manolo C.;Snook, Ian K.;Russo, Salvy P.;Efficient calculation of unbiased expectation values in diffusion;quantum Monte Carlo;PHYSICAL REVIEW B;86;20;201107;10.1103/PhysRevB.86.201107;NOV 29 2012;2012;Despite the proven utility of quantum Monte Carlo methods in addressing;the quantum many-body problem, many important observables are difficult;to calculate due to the presence of large, and sometimes divergent,;statistical errors. The present state of the art allows the construction;of renormalized estimators which result in finite variances, but which;invariably include some systematic bias. We present a simple method for;calculating unbiased expectation values of local operators in the;diffusion quantum Monte Carlo method which is applicable to both bare;and renormalized estimators, allowing the accurate calculation of;important properties such as forces.;snook, ian/A-3427-2009; Per, Manolo/C-3680-2011;1;0;0;0;1;1098-0121;WOS:000311694300001;;;J;Simonson, J. W.;Smith, G. J.;Post, K.;Pezzoli, M.;Kistner-Morris, J. J.;McNally, D. E.;Hassinger, J. E.;Nelson, C. S.;Kotliar, G.;Basov, D. N.;Aronson, M. C.;Magnetic and structural phase diagram of CaMn2Sb2;PHYSICAL REVIEW B;86;18;184430;10.1103/PhysRevB.86.184430;NOV 29 2012;2012;On the basis of magnetic, transport, and optical measurements performed;on single crystals, we report CaMn2Sb2 to be an antiferromagnetic;insulator that exhibits weak ferromagnetic order above the Neel;temperature. Magnetic susceptibility measurements reveal the magnitude;of the high-temperature Curie-Weiss moment to be only half as large as;the ground-state ordered moment, while electronic-structure calculations;based on crystallographic measurements suggest a crystal-field-induced;spin-state transition does not occur. The antiferromagnetic state is;relatively insensitive to both doping and modest pressures, while the;ferromagnetism can be readily tuned by either. Infrared transmission and;pressure-dependent resistivity measurements suggest proximity to an;electronic delocalization transition. We suggest the ferromagnetic state;may be the signature of magnetic polarons.;1;1;0;0;1;1098-0121;WOS:000311693900003;;;J;Stishov, Sergei M.;Petrova, Alla E.;Sidorov, Vladimir A.;Menzel, Dirk;Self-doping effects in cobalt silicide CoSi: Electrical, magnetic,;elastic, and thermodynamic properties (vol 86, 064433, 2012);PHYSICAL REVIEW B;86;17;179903;10.1103/PhysRevB.86.179903;NOV 29 2012;2012;0;0;0;0;0;1098-0121;WOS:000311693600005;;;J;Thede, M.;Xiao, F.;Baines, Ch.;Landee, C.;Morenzoni, E.;Zheludev, A.;Ordering in weakly coupled random singlet spin chains;PHYSICAL REVIEW B;86;18;180407;10.1103/PhysRevB.86.180407;NOV 29 2012;2012;The influence of bond randomness on long-range magnetic ordering in the;weakly coupled S = 1/2 antiferromagnetic spin chain materials;Cu(py)(2)(Cl1-xBrx)(2) is studied by muon spin rotation and bulk;measurements. Disorder is found to have a strong effect on the ordering;temperature T-N, and an even stronger one on the saturation;magnetization m(0), but considerably more so in the effectively;lower-dimensional Br-rich materials. The observed behavior is attributed;to random singlet ground states of individual spin chains, but remains;in contradiction with chain mean-field theory [Joshi and Yang, Phys.;Rev. B 67, 174403 (2003)] predictions. In this context, we discuss the;possibility of a universal distribution of ordered moments in the weakly;coupled random singlet chains model.;Thede, Matthias/L-2975-2013;4;0;0;0;4;1098-0121;WOS:000311693900001;;;J;Usov, V.;Stoyanov, S.;Coileain, C. O.;Toktarbaiuly, O.;Shvets, I. V.;Antiband instability on vicinal Si(111) under the condition of;diffusion-limited sublimation;PHYSICAL REVIEW B;86;19;195317;10.1103/PhysRevB.86.195317;NOV 29 2012;2012;In this paper, we investigate the antiband instability on vicinal;Si(111) surfaces with different angles of misorientation. It is known;that prolonged direct current-annealing of Si(111) results in the;formation of antibands; i.e., the step bunches with the opposite slope;to the primary bunches. We provide a theoretical description of antiband;formation via the evolution of the atomic steps' shape. We also derive a;criterion for the onset of the antiband instability under the conditions;of sublimation controlled by slow adatom surface diffusion. We examine;this criterion experimentally by studying the initial stage of the;antiband formation at a constant temperature of 1270 degrees C while;systematically varying the applied electromigration field. The;experiment strongly supports the validity of the derived theoretical;criterion and indicates the importance of accounting for the factor of;critical field in the theoretical modeling of step bunching or antiband;instabilities. Deduced from the comparison of theory and experiment, the;Si surface atoms' effective charge cannot exceed double the elementary;charge, set by the lower limit of kinetic characteristic length d(s) =;0.3 nm. Using d(s) = 1.7 - 4.5 nm draws values of the effective charge;in line with the values reported in earlier studies.;Shvets, Igor/J-8710-2013;0;0;0;0;0;1098-0121;WOS:000311694200005;;;J;Weber, Cedric;Mila, Frederic;Anticollinear magnetic order induced by impurities in the frustrated;Heisenberg model of pnictides;PHYSICAL REVIEW B;86;18;184432;10.1103/PhysRevB.86.184432;NOV 29 2012;2012;We present Monte Carlo simulations for a classical antiferromagnetic;Heisenberg model with both nearest (J(1)) and next-nearest (J(2));exchange couplings on the square lattice in the presence of nonmagnetic;impurities. We show that the order-by-disorder entropy selection,;associated with the Ising-like phase transition that appears for;J(2)/J(1) > 1/2 in the pure spin model, is quenched at low temperature;due to the presence of nonmagnetic impurities. Evidence that a new;competing order is stabilized around the impurities and in turn induces;a reentrance phase transition is reported. Implications for local;magnetic measurement of the parent compound of iron pnictides are;briefly discussed.;Weber, Cedric/D-5027-2014;Weber, Cedric/0000-0002-6989-2700;4;0;0;0;4;1098-0121;WOS:000311693900005;;;J;Weston, L.;Cui, X. Y.;Delley, B.;Stampfl, C.;Band offsets and polarization effects in wurtzite ZnO/Mg0.25Zn0.75O;superlattices from first principles;PHYSICAL REVIEW B;86;20;205322;10.1103/PhysRevB.86.205322;NOV 29 2012;2012;Using first-principles calculations, we investigate the band offsets,;built-in electric fields, and band gaps of (0001)-oriented wurtzite;ZnO/Mg0.25Zn0.75O superlattices, including the dependence on;superlattice geometry and strain. Significant built-in electric fields;form inside the quantum-well region that are found to be tunable over;the range 0.24 MV/cm <= E-w <= 0.63 MV/cm, and potentially up to 1MV/cm;by varying the relative width of the well and barrier regions. The;valence band offset at the ZnO/Mg0.25Zn0.75O interface is calculated to;be 0.25-0.26 eV which, in contrast to the "common anion rule," is a;significant portion of the total band offset, and this is in support of;recent experiment. Calculated values for the valence band offset were;found to be insensitive to variations in superlattice geometry and;strain. The band gap of the superlattice is determined by the competing;effects of quantum confinement and the quantum-confined Stark effect,;with the former being more dominant for the systems investigated. These;findings will be useful in the design and optimization of ZnO/MgxZn1-xO;superlattices for electronics and optoelectronics applications.;Delley, Bernard/E-1336-2014;Delley, Bernard/0000-0002-7020-2869;3;0;1;0;4;1098-0121;WOS:000311694300003;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;PHYSICAL REVIEW B;86;19;195141;10.1103/PhysRevB.86.195141;NOV 29 2012;2012;We perform realistic first-principles calculations of iron chalcogenides;and ruthenate-based materials to identify experimental signatures of;Hund's-coupling-induced correlations in these systems. We find that FeTe;and KxFe2-yAs2 display unusual orbital-dependent fractional power-law;behavior in their quasiparticle self-energy and optical conductivity, a;phenomenon first identified in SrRuO3. Strong incoherence in the;paramagnetic state of these materials results in electronic states;hidden to angle-resolved photoemission spectroscopy which reemerge at;low temperatures. We identify the effective low-energy Hamiltonian;describing these systems and show that these anomalies are not;controlled by the proximity to a quantum critical point but result from;coexistence of fast quantum mechanical orbital fluctuations and slow;spin fluctuations.;Yin, Zhiping/G-3949-2012;Yin, Zhiping/0000-0001-8679-5251;10;0;0;0;10;1098-0121;WOS:000311694200002;;;J;Kumar, A.;Fennie, C. J.;Rabe, K. M.;Spin-lattice coupling and phonon dispersion of CdCr2O4 from first;principles;PHYSICAL REVIEW B;86;18;184429;10.1103/PhysRevB.86.184429;NOV 28 2012;2012;First-principles calculations are used to investigate the effects of;magnetic ordering on the minimum-energy structure and on the full phonon;dispersion relation of CdCr2O4, focusing on the changes through the;coupled magnetic/structural transition which shows relief of the;geometric frustration of the antiferromagnetic ordering on the;pyrochlore lattice. We computed the full phonon dispersion relations for;the ferromagnetic and antiferromagnetic orderings in cubic and;tetragonal structures of CdCr2O4. We extracted the phonon dispersion for;the cubic paramagnetic phase and found that it compares wellwith the;experimental results. The AFM ordering is seen to lower the symmetry and;induce a lattice distortion comparable in magnitude to that observed in;the transition. While the spin-phonon couplings are large for modes;which involve displacement of the Cr atoms, there are no unstable modes;at any point in the Brillouin zone for either of the magnetic orderings;considered, and thus we conclude that the phase transition is driven not;by spin-phonon coupling, but by the atomic forces and stresses induced;by the magnetic order. Finally, by comparison of the phonon frequencies;for structures with different magnetic orderings and structural;distortions, we find that the spin-phonon coupling, rather than the;coupling of the phonons to the structural change, is the dominant factor;in the observed changes of phonon frequencies through the phase;transition.;Kumar, Anil/A-9834-2013;Kumar, Anil/0000-0002-4901-8987;1;0;0;0;1;1098-0121;WOS:000311604700002;;;J;Lin, Shi-Zeng;Bulaevskii, Lev N.;Batista, Cristian D.;Vortex dynamics in ferromagnetic superconductors: Vortex clusters,;domain walls, and enhanced viscosity;PHYSICAL REVIEW B;86;18;180506;10.1103/PhysRevB.86.180506;NOV 28 2012;2012;We demonstrate that there is a long-range vortex-vortex attraction in;ferromagnetic superconductors due to polarization of the magnetic;moments. Vortex clusters are then stabilized in the ground state for low;vortex densities. The motion of vortex clusters driven by the Lorentz;force excites magnons. This regime becomes unstable at a threshold;velocity above which domain walls are generated for slow relaxation of;the magnetic moments and the vortex configuration becomes modulated.;This dynamics of vortices and magnetic moments can be probed by;transport measurements.;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;6;0;0;0;6;1098-0121;WOS:000311604700001;;;J;Wong, Chris L. M.;Law, K. T.;Majorana Kramers doublets in dx2-y2-wave superconductors with Rashba;spin-orbit coupling;PHYSICAL REVIEW B;86;18;184516;10.1103/PhysRevB.86.184516;NOV 28 2012;2012;In this work, we show that a quasi-one-dimensional d(x2-y2)-wave;superconductor with Rashba spin-orbit coupling is a DIII class,;time-reversal invariant, topological superconductor (TS), which supports;a Majorana Kramers Doublet (MKD) at each end of the TS. A MKD is a pair;of Majorana end states (MESs) protected by time-reversal symmetry (TRS).;An external magnetic field breaks TRS and drives the system from DIII to;D class in which case a single MES appears at each end of the TS. We;show that a MKD induces resonant Andreev reflection with zero-bias;conductance peak of 4e(2)/h. Experimental realizations of the proposed;model are discussed.;Law, Kam/H-1410-2011;19;1;0;0;19;1098-0121;WOS:000311604700003;;;J;De Luca, M.;Pettinari, G.;Ciatto, G.;Amidani, L.;Filippone, F.;Polimeni, A.;Fonda, E.;Boscherini, F.;Bonapasta, A. Amore;Giubertoni, D.;Knuebel, A.;Lebedev, V.;Capizzi, M.;Identification of four-hydrogen complexes in In-rich InxGa1-xN (x > 0.4);alloys using photoluminescence, x-ray absorption, and density functional;theory;PHYSICAL REVIEW B;86;20;201202;10.1103/PhysRevB.86.201202;NOV 28 2012;2012;Postgrowth hydrogen incorporation in In-rich InxGa1-xN (x > 0.4) alloys;strongly modifies the optical and structural properties of the material:;A large blueshift of the emission and absorption energies is accompanied;by a remarkable broadening of the interatomic-distance distribution, as;probed by synchrotron radiation techniques. Both effects vanish at a;finite In-concentration value (x similar to 0.5). Synergic x-ray;absorption measurements and first-principle calculations unveil two;different defective species forming upon hydrogenation: one due to the;high chemical reactivity of H, the other ascribed to mere lattice;damage. In the former species, four H atoms bind to as many N atoms, all;nearest-neighbors of a same In atom. The stability of this peculiar;complex, which is predicted to behave as a donor, stems from atomic;displacements cooperating to reduce local strain.;Fonda, Emiliano/D-9666-2011; Filippone, Francesco/I-4718-2012; Pettinari, Giorgio/M-8678-2014;Filippone, Francesco/0000-0001-5862-1115; Pettinari,;Giorgio/0000-0003-0187-3770;1;0;0;0;1;1098-0121;WOS:000311605000001;;;J;Grytsyuk, Sergiy;Peskov, Maxim V.;Schwingenschloegl, Udo;First-principles modeling of interfaces between solids with large;lattice mismatch: The prototypical CoO(111)/Ni(111) interface;PHYSICAL REVIEW B;86;17;174115;10.1103/PhysRevB.86.174115;NOV 28 2012;2012;In this work we investigate the CoO(111)/Ni(111) interface by;first-principles calculations, focusing on its structure and stability.;To satisfy the approximate 5:6 ratio of the CoO and Ni lattice;constants, we construct a supercell with 5 x 5 Co (O) and 6 x 6 Ni atoms;per layer in the bulk regions. For the interface Ni layer and the;adjacent Ni layer we consider different configurations and study the;binding energy. We show for an ideal CoO interface terminated by 5 x 5 O;atoms that the structure is more stable if there are 5 x 5 Ni atoms next;to it instead of 6 x 6 as in the bulk. In addition, we observe that a;transition layer with 31 or 33 Ni atoms located between the interface 5;x 5 Ni and bulk 6 x 6 Ni layers (which partially reflects the structures;of both these layers) enhances the stability of the CoO/Ni interface.;The electronic and magnetic modifications induced by the interface;formation are discussed.;3;0;0;0;3;1098-0121;WOS:000311604400001;;;J;Luekermann, D.;Sologub, S.;Pfnuer, H.;Klein, C.;Horn-von Hoegen, M.;Tegenkamp, C.;Scattering at magnetic and nonmagnetic impurities on surfaces with;strong spin-orbit coupling;PHYSICAL REVIEW B;86;19;195432;10.1103/PhysRevB.86.195432;NOV 28 2012;2012;Adsorption-induced reduction of surface-state conductivity in epitaxial;Bi(111) films, a prototype system with large Rashba-induced;surface-state splitting, by adsorbed atoms of Bi, Fe, and Co has been;investigated by macroscopic surface magnetotransport measurements at a;temperature of 10 K. A detailed analysis of magnetotransport, dc;transport, and Hall data reveals that the scattering efficiencies for Co;and Fe are larger by a factor of 2 than that for Bi. While for the;latter charge transfer and change of band filling near the Fermi level;are negligible, we find an increase of hole concentration upon Co and Fe;adsorption. These atoms act as acceptors and immobilize on average about;0.5 electrons per adsorbed atom. Besides the dominant classical;magnetoconductance signal the films show signatures of weak;antilocalization, reflecting the strong spin-orbit coupling in Bi(111);surface states. This behavior can be changed to weak localization by the;adsorption of high concentrations (0.1 monolayers) of magnetic;impurities (Fe, Co), similarly to results found on the topological;insulator Bi2Se3. Our results demonstrate that details of chemical bond;formation for impurities are crucial for local spin moments and;electronic scattering properties.;5;0;0;0;5;1098-0121;WOS:000311604900001;;;J;Molina-Sanchez, A.;Garcia-Cristobal, A.;Bester, G.;Semiempirical pseudopotential approach for nitride-based nanostructures;and ab initio based passivation of free surfaces;PHYSICAL REVIEW B;86;20;205430;10.1103/PhysRevB.86.205430;NOV 28 2012;2012;We present a semiempirical pseudopotential method based on screened;atomic pseudopotentials and derived from ab initio calculations. This;approach is motivated by the demand for pseudopotentials able to address;nanostructures, where ab initio methods are both too costly and;insufficiently accurate at the level of the local density approximation,;while mesoscopic effective-mass approaches are inapplicable due to the;small size of the structures along, at least, one dimension. In this;work, we improve the traditional pseudopotential method by a two-step;process: First, we invert a set of self-consistently determined screened;ab initio potentials in wurtzite GaN for a range of unit-cell volumes,;thus determining spherically symmetric and structurally averaged atomic;potentials. Second, we adjust the potentials to reproduce observed;excitation energies. We find that the adjustment represents a reasonably;small perturbation over the potential, so that the ensuing potential;still reproduces the original wave functions, while the excitation;energies are significantly improved. We furthermore deal with the;passivation of the dangling bonds of free surfaces which is relevant for;the study of nanowires and colloidal nanoparticles. We present a;methodology to derive passivant pseudopotentials from ab initio;calculations. We apply our pseudopotential approach to the exploration;of the confinement effects on the electronic structure of GaN nanowires.;Bester, Gabriel/I-4414-2012;Bester, Gabriel/0000-0003-2304-0817;1;0;0;0;1;1098-0121;WOS:000311605000005;;;J;Patel, Aavishkar A.;Dutta, Amit;Sudden quenching in the Kitaev honeycomb model: Study of defect and heat;generation;PHYSICAL REVIEW B;86;17;174306;10.1103/PhysRevB.86.174306;NOV 28 2012;2012;We study the behavior of the defect and heat densities under sudden;quenching near the quantum critical points in the two-dimensional Kitaev;honeycomb model both in the thermodynamic and nonthermodynamic limits.;We consider quenches starting from a quantum critical point into the;gapped as well as the gapless phases. We choose points on the lines of;anisotropic quantum critical points as well as different points of;intersection of these lines as the initial points from where the;quenching starts. We find that the defect and heat densities display the;expected power-law scalings along with logarithmic corrections to;scaling (or cusp singularities) in certain cases. In the vicinity of;some of the intersection points, the scaling behaviors change,;indicating an effective dimensional reduction; the scaling behavior near;these points depends on the number of critical lines crossed in the;process of quenching. All the analytical predictions are also verified;by numerical integration.;1;0;0;0;1;1098-0121;WOS:000311604400002;;;J;Raith, Martin;Stano, Peter;Fabian, Jaroslav;Theory of spin relaxation in two-electron laterally coupled Si/SiGe;quantum dots;PHYSICAL REVIEW B;86;20;205321;10.1103/PhysRevB.86.205321;NOV 28 2012;2012;Highly accurate numerical results of phonon-induced two-electron spin;relaxation in silicon double quantum dots are presented. The relaxation,;enabled by spin-orbit coupling and the nuclei of Si-29 (natural or;purified abundance), is investigated for experimentally relevant;parameters, the interdot coupling, the magnetic field magnitude and;orientation, and the detuning. We calculate relaxation rates for zero;and finite temperatures (100 mK), concluding that our findings for zero;temperature remain qualitatively valid also for 100 mK. We confirm the;same anisotropic switch of the axis of prolonged spin lifetime with;varying detuning as recently predicted in GaAs. Conditions for possibly;hyperfine-dominated relaxation are much more stringent in Si than in;GaAs. For experimentally relevant regimes, the spin-orbit coupling,;although weak, is the dominant contribution, yielding anisotropic;relaxation rates of at least two orders of magnitude lower than in GaAs.;Raith, Martin/A-3357-2011; Stano, Peter/C-3016-2013; Fabian, Jaroslav/K-1700-2013;Fabian, Jaroslav/0000-0002-3009-4525;6;0;0;0;6;1098-0121;WOS:000311605000004;;;J;Romhanyi, Judit;Penc, Karlo;
7:5:8:27     Theory of magneto-optical effects in helical multiferroic materials via toroidal magnon excitation (vol 89, 195145, 2014)
DOI:10.1103/PhysRevB.89.239906  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Miyahara, S.;Furukawa, N.;
7:5:9:1     Long-range magnetic interactions in the multiferroic antiferromagnet MnWO4
DOI:10.1103/PhysRevB.83.140401  JN:PHYSICAL REVIEW B  PY:2011
  TC:22  AU: Ye, Feng;Fishman, Randy S.;Fernandez-Baca, Jaime A.;Podlesnyak, Andrey A.;Ehlers, Georg;Mook, Herbert A.;Wang, Yaqi;Lorenz, Bernd;Chu, C. W.;
7:5:9:2     Electric-field control of the chiral magnetism of multiferroic MnWO4 as seen via polarized neutron diffraction
DOI:10.1103/PhysRevB.81.054430  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Finger, T.;Senff, D.;Schmalzl, K.;Schmidt, W.;Regnault, L. P.;Becker, P.;Bohaty, L.;Braden, M.;
7:5:9:3     Magnetic order and spin-flop transitions in the cobalt-doped multiferroic Mn1-xCoxWO4
DOI:10.1103/PhysRevB.86.094429  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Ye, Feng;Chi, Songxue;Fernandez-Baca, Jaime A.;Cao, Huibo;Liang, K. -C.;Wang, Yaqi;Lorenz, Bernd;Chu, C. W.;
7:5:9:4     Robust ferroelectric state in multiferroic Mn1-xZnxWO4
DOI:10.1103/PhysRevB.83.014401  JN:PHYSICAL REVIEW B  PY:2011
  TC:21  AU: Chaudhury, R. P.;Ye, F.;Fernandez-Baca, J. A.;Lorenz, B.;Wang, Y. Q.;Sun, Y. Y.;Mook, H. A.;Chu, C. W.;
7:5:9:5     Magnetic and multiferroic phases of single-crystalline Mn0.85Co0.15WO4
DOI:10.1103/PhysRevB.82.184422  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Chaudhury, R. P.;Ye, F.;Fernandez-Baca, J. A.;Wang, Y. -Q.;Sun, Y. Y.;Lorenz, B.;Mook, H. A.;Chu, C. W.;
7:5:9:6     Landau theory of the magnetic phase diagram of monoclinic multiferroics: Application to MnWO4 and CuO
DOI:10.1103/PhysRevB.87.174428  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Quirion, G.;Plumer, M. L.;
7:5:9:7     Conical antiferromagnetic order in the ferroelectric phase of Mn0.8Co0.2WO4 resulting from the competition between collinear and cycloidal structures
DOI:10.1103/PhysRevB.85.224419  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Urcelay-Olabarria, I.;Ressouche, E.;Mukhin, A. A.;Ivanov, V. Yu.;Balbashov, A. M.;Garcia-Munoz, J. L.;Skumryev, V.;
7:5:9:8     Landau theory for the phase diagram of multiferroic Mn1-x(Fe,Zn,Mg)(x)WO4
DOI:10.1103/PhysRevB.85.174408  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Matityahu, Shlomi;Aharony, Amnon;Entin-Wohlman, Ora;
7:5:9:9     Stabilized helical spin order and multiferroic phase coexistence in MnWO4: Consequence of 4d Ru substitution of Mn
DOI:10.1103/PhysRevB.87.104404  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Yu, H. W.;Liu, M. F.;Li, X.;Li, L.;Lin, L.;Yan, Z. B.;Liu, J. -M.;
7:5:9:10     Chemical doping-induced flop of ferroelectric polarization in multiferroic Mn0.9Co0.1WO4
DOI:10.1103/PhysRevB.82.214418  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Song, Y. -S.;Yan, Li Qin;Lee, Bumsung;Chun, Sae Hwan;Kim, Kee Hoon;Kim, Sung Baek;Nogami, A.;Katsufuji, T.;Schefer, J.;Chung, J. -H.;
7:5:9:11     Local symmetry and magnetic anisotropy in multiferroic MnWO4 and antiferromagnetic CoWO4 studied by soft x-ray absorption spectroscopy
DOI:10.1103/PhysRevB.82.184429  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Hollmann, N.;Hu, Z.;Willers, T.;Bohaty, L.;Becker, P.;Tanaka, A.;Hsieh, H. H.;Lin, H. -J.;Chen, C. T.;Tjeng, L. H.;
7:5:9:12     Lattice dynamics and temperature-dependent Raman and infrared studies of multiferroic Mn0.85Co0.15WO4 and Mn0.97Fe0.03WO4 crystals
DOI:10.1103/PhysRevB.83.174439  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Maczka, M.;Ptak, M.;Hermanowicz, K.;Majchrowski, A.;Pikul, A.;Hanuza, J.;
7:5:9:13     Neutron diffraction, magnetic, and magnetoelectric studies of phase transitions in multiferroic Mn0.90Co0.10WO4
DOI:10.1103/PhysRevB.85.094436  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Urcelay-Olabarria, I.;Ressouche, E.;Mukhin, A. A.;Ivanov, V. Yu;Balbashov, A. M.;Vorobev, G. P.;Popov, Yu F.;Kadomtseva, A. M.;Garcia-Munoz, J. L.;Skumryev, V.;
7:5:9:14     Magnetic-field-induced spontaneous polarization reversal in multiferroic Mn0.85Co0.15WO4
DOI:10.1103/PhysRevB.89.054414  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Poudel, N.;Liang, K. -C.;Wang, Y. -Q.;Sun, Y. Y.;Lorenz, B.;Ye, F.;Fernandez-Baca, J. A.;Chu, C. W.;
7:5:9:15     Lattice anomalies at the ferroelectric and magnetic transitions in cycloidal Mn0.95Co0.05WO4 and conical Mn0.80Co0.20WO4 multiferroics
DOI:10.1103/PhysRevB.86.184412  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Urcelay-Olabarria, I.;Garcia-Munoz, J. L.;Ressouche, E.;Skumryev, V.;Ivanov, V. Yu.;Mukhin, A. A.;Balbashov, A. M.;
7:5:9:16     Second harmonic generation on incommensurate structures: The case of multiferroic MnWO4
DOI:10.1103/PhysRevB.82.155112  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Meier, D.;Leo, N.;Yuan, G.;Lottermoser, Th.;Fiebig, M.;Becker, P.;Bohaty, L.;
7:5:9:17     Time-resolved imaging of magnetoelectric switching in multiferroic MnWO4
DOI:10.1103/PhysRevB.84.184404  JN:PHYSICAL REVIEW B  PY:2011
  TC:13  AU: Hoffmann, T.;Thielen, P.;Becker, P.;Bohaty, L.;Fiebig, M.;
7:5:9:18     X phase of MnWO4
DOI:10.1103/PhysRevB.90.024408  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Urcelay-Olabarria, I.;Ressouche, E.;Mukhin, A. A.;Ivanov, V. Yu.;Kadomtseva, A. M.;Popov, Yu. F.;Vorob'ev, G. P.;Balbashov, A. M.;Garcia-Munoz, J. L.;Skumryev, V.;
7:5:9:19     Spin dynamics in the multiferroic materials (invited)
DOI:10.1063/1.3677863  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Ye, Feng;Fishman, Randy S.;Haraldsen, Jason;Lorenz, Bernd;Chu, C. W.;Kimura, Tsuyoshi;
7:5:9:20     Ion doping effects in multiferroic MnWO4
DOI:10.1063/1.4703913  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Bahoosh, Safa Golrokh;Wesselinowa, J. M.;
7:5:9:21     Multiferroic phase stability in non-stoichiometric MnWO4
DOI:10.1063/1.4866087  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yu, H. W.;Li, X.;Li, L.;Liu, M. F.;Yan, Z. B.;Liu, J. -M.;
7:5:9:22     Electronic structure and anomalous band-edge absorption feature in multiferroic MnWO4: An optical spectroscopic study
DOI:10.1103/PhysRevB.81.205111  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Choi, Woo Seok;Taniguchi, K.;Moon, S. J.;Seo, S. S. A.;Arima, T.;Hoang, H.;Yang, I. -S.;Noh, T. W.;Lee, Y. S.;
7:5:9:23     Observation of spontaneous ferroelectric polarization reversal in multiferroic Mn1-xNixWO4 (x approximate to 0.16)
DOI:10.1063/1.4885392  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Song, Young-Sang;Chung, Jae-Ho;Shin, Kwang Woo;Kim, Kee Hoon;Oh, In Hwan;
7:5:9:24     Multiferroic Phase Control in MnWO4 Doped with Fe, Co, and Zn: A Comparative Study
DOI:10.1080/10584587.2011.616403  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:4  AU: Liang, K. -C.;Chaudhury, R. P.;Lorenz, B.;Wang, Y. Q.;Sun, Y. Y.;Chu, C. W.;
7:5:9:25     Control of Improper Ferroelectricity by Chemical Substitution and Magnetic Fields in Multiferroic Mn1-xCuxWO4
DOI:10.1080/00150193.2014.922815  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Liang, K. -C.;Wang, Y. Q.;Sun, Y. Y.;Lorenz, B.;Chu, C. W.;
7:5:9:26     Field-induced continuous rotation of the polarization in multiferroic Mn0.95Co0.05WO4
DOI:10.1063/1.3671419  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Liang, K. -C.;Chaudhury, R. P.;Wang, Y. Q.;Sun, Y. Y.;Lorenz, B.;Chu, C. W.;
7:5:9:27     Neutron Laue Diffraction Study on the Magnetic Phase Diagram of Multiferroic MnWO4 under Pulsed High Magnetic Fields
DOI:10.1103/PhysRevLett.106.237202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:10  AU: Nojiri, H.;Yoshii, S.;Yasui, M.;Okada, K.;Matsuda, M.;Jung, J. -S.;Kimura, T.;Santodonato, L.;Granroth, G. E.;Ross, K. A.;Carlo, J. P.;Gaulin, B. D.;
7:5:9:28     Kinetics of the multiferroic switching in MnWO4
DOI:10.1103/PhysRevB.89.144406  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Baum, M.;Leist, J.;Finger, Th.;Schmalzl, K.;Hiess, A.;Regnault, L. P.;Becker, P.;Bohaty, L.;Eckold, G.;Braden, M.;
7:5:9:29     Long-range magnetic interactions in the multiferroic antiferromagnet MnWO4 (vol 83, 140401, 2011)
DOI:10.1103/PhysRevB.84.179901  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Ye, Feng;Fishman, Randy S.;Fernandez-Baca, Jaime A.;Podlesnyak, Andrey A.;Ehlers, Georg;Mook, Herbert A.;Wang, Yaqi;Lorenz, Bernd;Chu, C. W.;
7:5:9:30     Induced motion of domain walls in multiferroics with quadratic interaction
DOI:10.1016/j.jmmm.2013.05.046  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:0  AU: Gerasimchuk, Victor S.;Shitov, Anatoliy A.;
7:5:10:1     Giant Improper Ferroelectricity in the Ferroaxial Magnet CaMn7O12
DOI:10.1103/PhysRevLett.108.067201  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:58  AU: Johnson, R. D.;Chapon, L. C.;Khalyavin, D. D.;Manuel, P.;Radaelli, P. G.;Martin, C.;
7:5:10:2     Multiferroic properties of CaMn7O12
DOI:10.1103/PhysRevB.84.174413  JN:PHYSICAL REVIEW B  PY:2011
  TC:29  AU: Zhang, Guoquan;Dong, Shuai;Yan, Zhibo;Guo, Yanyan;Zhang, Qinfang;Yunoki, Seiji;Dagotto, Elbio;Liu, J. -M.;
7:5:10:3     General Theory for the Ferroelectric Polarization Induced by Spin-Spiral Order
DOI:10.1103/PhysRevLett.107.157202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:21  AU: Xiang, H. J.;Kan, E. J.;Zhang, Y.;Whangbo, M. -H.;Gong, X. G.;
7:5:10:4     Giant Ferroelectric Polarization of CaMn7O12 Induced by a Combined Effect of Dzyaloshinskii-Moriya Interaction and Exchange Striction
DOI:10.1103/PhysRevLett.108.187204  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:23  AU: Lu, X. Z.;Whangbo, M. -H.;Dong, Shuai;Gong, X. G.;Xiang, H. J.;
7:5:10:5     Magnetic properties and origins of ferroelectric polarization in multiferroic CaMn7O12
DOI:10.1103/PhysRevB.87.075127  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Zhang, J. T.;Lu, X. M.;Zhou, J.;Sun, H.;Huang, F. Z.;Zhu, J. S.;
7:5:10:6     Predicting the spin-lattice order of frustrated systems from first principles
DOI:10.1103/PhysRevB.84.224429  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Xiang, H. J.;Kan, E. J.;Wei, Su-Huai;Whangbo, M. -H.;Gong, X. G.;
7:5:10:7     Possible coupling between magnons and phonons in multiferroic CaMn7O12
DOI:10.1103/PhysRevB.90.054307  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Kadlec, Filip;Goian, Veronica;Kadlec, Christelle;Kempa, Martin;Vanek, Premysl;Taylor, Jon;Rols, Stephane;Prokleska, Jan;Orlita, Milan;Kamba, Stanislav;
7:5:10:8     Magnetoelectric coupling driven by inverse magnetostriction in multiferroic BiMn3Mn4O12
DOI:10.1063/1.4789350  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Gauzzi, A.;Rousse, G.;Mezzadri, F.;Calestani, G. L.;Andre, G.;Bouree, F.;Calicchio, M.;Gilioli, E.;Cabassi, R.;Bolzoni, F.;Prodi, A.;Bordet, P.;Marezio, M.;
7:5:10:9     Unified model of ferroelectricity induced by spin order
DOI:10.1103/PhysRevB.88.054404  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Xiang, H. J.;Wang, P. S.;Whangbo, M. -H.;Gong, X. G.;
7:5:10:10     Successive Magnetic Phase Transitions and Multiferroicity in the Spin-One Triangular-Lattice Antiferromagnet Ba3NiNb2O9
DOI:10.1103/PhysRevLett.109.257205  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:8  AU: Hwang, J.;Choi, E. S.;Ye, F.;Dela Cruz, C. R.;Xin, Y.;Zhou, H. D.;Schlottmann, P.;
7:5:10:11     Helicoidal magnetic structure and ferroelectric polarization in Cu3Nb2O8
DOI:10.1103/PhysRevB.86.174401  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Li, Zheng-Lu;Whangbo, M. -H.;Gong, X. G.;Xiang, H. J.;
7:5:10:12     Spin-phonon and magnetostriction phenomena in CaMn7O12 helimagnet probed by Raman spectroscopy
DOI:10.1063/1.4902234  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Nonato, A.;Araujo, B. S.;Ayala, A. P.;Maciel, A. P.;Yanez-Vilar, S.;Sanchez-Andujar, M.;Senaris-Rodriguez, M. A.;Paschoal, C. W. A.;
7:5:10:13     Multiferroicity in Mn-deficient Ca3CoMnO6: The consequence of Fe substitution
DOI:10.1063/1.4811814  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Lin, L.;Xie, Y. L.;Liu, M. F.;Guo, Y. J.;Yan, Z. B.;Liu, J. -M.;
7:5:10:14     Soft vibrational mode associated with incommensurate orbital order in multiferroic CaMn7O12
DOI:10.1103/PhysRevB.90.104414  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Du, Xinyu;Yuan, Renliang;Duan, Lian;Wang, Chong;Hu, Yuwen;Li, Yuan;
7:5:10:15     Prediction of a multiferroic state with large electric polarization in tensile-strained TbMnO3
DOI:10.1103/PhysRevB.88.060406  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Hou, Y. S.;Yang, J. H.;Gong, X. G.;Xiang, H. J.;
7:5:10:16     Raman study of phonons in CaMn7O12: Effects of structural modulation and structural transition
DOI:10.1103/PhysRevB.89.214302  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Iliev, M. N.;Hadjiev, V. G.;Gospodinov, M. M.;Nikolova, R. P.;Abrashev, M. V.;
7:5:10:17     Magnetic-Field Induced Competition of Two Multiferroic Orders in a Triangular-Lattice Helimagnet Mn I-2
DOI:10.1103/PhysRevLett.106.167206  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:7  AU: Kurumaji, T.;Seki, S.;Ishiwata, S.;Murakawa, H.;Tokunaga, Y.;Kaneko, Y.;Tokura, Y.;
7:5:10:18     Magnetic ordering and multiferroicity in MnI2
DOI:10.1103/PhysRevB.86.134413  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Wu, Xianxin;Cai, Yingxiang;Xie, Qing;Weng, Hongming;Fan, Heng;Hu, Jiangping;
7:5:11:1     Temperature- and magnetic-field-induced magnetization reversal in perovskite YFe0.5Cr0.5O3
DOI:10.1063/1.3590714  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:25  AU: Mao, Jinhua;Sui, Yu;Zhang, Xingquan;Su, Yantao;Wang, Xianjie;Liu, Zhiguo;Wang, Yi;Zhu, Ruibin;Wang, Yang;Liu, Wanfa;Tang, Jinke;
7:5:11:2     Magnetic features in REMeO3 perovskites and their solid solutions (RE=rare-earth, Me=Mn, Cr)
DOI:10.1016/j.jmmm.2013.02.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:6  AU: Moure, Carlos;Pena, Octavio;
7:5:11:3     Positive exchange bias from magnetization reversal in La1-xPrxCrO3 (x similar to 0.7-0.85)
DOI:10.1063/1.3644473  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:22  AU: Yoshii, Kenji;
7:5:11:4     Positive and negative exchange bias effects in the simple perovskite manganite NdMnO3
DOI:10.1063/1.4751990  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:20  AU: Hong, Fang;Cheng, Zhenxiang;Wang, Jianli;Wang, Xiaolin;Dou, Shixue;
7:5:11:5     Temperature-induced magnetization reversal in BiFe0.5Mn0.5O3 synthesized at high pressure
DOI:10.1103/PhysRevB.82.100416  JN:PHYSICAL REVIEW B  PY:2010
  TC:24  AU: Mandal, P.;Sundaresan, A.;Rao, C. N. R.;Iyo, A.;Shirage, P. M.;Tanaka, Y.;Simon, Ch.;Pralong, V.;Lebedev, O. I.;Caignaert, V.;Raveau, B.;
7:5:11:6     Coexistence of sign reversal of both magnetization and exchange bias field in the core-shell type La0.2Ce0.8CrO3 nanoparticles
DOI:10.1063/1.3453530  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:27  AU: Manna, P. K.;Yusuf, S. M.;Shukla, R.;Tyagi, A. K.;
7:5:11:7     Magnetization reversal and Yb3+/Cr3+ spin ordering at low temperature for perovskite YbCrO3 chromites
DOI:10.1063/1.3457905  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:25  AU: Su, Yuling;Zhang, Jincang;Feng, Zhenjie;Li, Li;Li, Beizhan;Zhou, Yun;Chen, Zhenping;Cao, Shixun;
7:5:11:8     Observation of tunable exchange bias in Sr2YbRuO6
DOI:10.1063/1.3505525  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:19  AU: Singh, R. P.;Tomy, C. V.;Grover, A. K.;
7:5:11:9     Bipolar switching of magnetization and tunable exchange bias in NdCr1-xMnxO3 (x=0.0-0.30)
DOI:10.1063/1.4891682  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Bora, Tribedi;Ravi, S.;
7:5:11:10     Magnetization switching of rare earth orthochromite CeCrO3
DOI:10.1063/1.4882642  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Cao, Yiming;Cao, Shixun;Ren, Wei;Feng, Zhenjie;Yuan, Shujuan;Kang, Baojuan;Lu, Bo;Zhang, Jincang;
7:5:11:11     Magnetization reversal in TmCrO3
DOI:10.1016/j.materresbull.2012.08.005  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:14  AU: Yoshii, Kenji;
7:5:11:12     Sign reversal of magnetization and exchange bias field in LaCr0.85Mn0.15O3
DOI:10.1063/1.4826903  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Bora, Tribedi;Ravi, S.;
7:5:11:13     Study of magnetization reversal in LaCr1-xFexO3 compounds
DOI:10.1063/1.4813516  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Bora, Tribedi;Ravi, S.;
7:5:11:14     Multiple temperature-induced magnetization reversals in SmCr1-xFexO3 system
DOI:10.1016/j.materresbull.2013.06.016  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:8  AU: Yin, L. H.;Liu, Y.;Tan, S. G.;Zhao, B. C.;Dai, J. M.;Song, W. H.;Sun, Y. P.;
7:5:11:15     Negative magnetization and the tunable exchange bias field in LaCr0.8Mn0.2O3
DOI:10.1016/j.jmmm.2014.01.063  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:5  AU: Bora, Tribedi;Ravi, S.;
7:5:11:16     Thermally activated magnetization reversal in bulk BiFe0.5Mn0.5O3
DOI:10.1103/PhysRevB.88.014431  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Delmonte, D.;Mezzadri, F.;Pernechele, C.;Calestani, G.;Spina, G.;Lantieri, M.;Solzi, M.;Cabassi, R.;Bolzoni, F.;Migliori, A.;Ritter, C.;Gilioli, E.;
7:5:11:17     Studies on (Sr1-xCax)MnO3 (0.0 <= x <= 1.0) ceramics having negative magnetization
DOI:10.1016/j.jmmm.2013.11.004  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Pawar, R. P.;Gaikwad, S. S.;Wu, S. Y.;Puri, Vijaya;
7:5:11:18     Magnetic structure and magnetic properties of Nd1-xNaxMnO3 compounds
DOI:10.1063/1.3656714  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Samantaray, B.;Ravi, S.;Das, A.;Srivastava, S. K.;
7:5:11:19     Large exchange bias and magnetocaloric effect in TbMn2Si2
DOI:10.1063/1.4903770  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Maji, Bibekananda;Ray, Mayukh K.;Suresh, K. G.;Banerjee, S.;
7:5:11:20     Negative magnetization of Li2Ni2Mo3O12: A spin system composed of distorted honeycomb lattices and linear chains
DOI:10.1103/PhysRevB.84.104402  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Hase, Masashi;Pomjakushin, Vladimir Yu;Sikolenko, Vadim;Keller, Lukas;Luetkens, Hubertus;Doenni, Andreas;Kitazawa, Hideaki;
7:5:11:21     Spin reversal, magnetic domains and relaxation mechanisms in Er(Co,Mn)O-3 perovskites
DOI:10.1016/j.tsf.2009.10.029  JN:THIN SOLID FILMS  PY:2010
  TC:1  AU: Pena, O.;Antunes, A. B.;Gil, V.;Moure, C.;de Brion, S.;
7:5:12:1     Multiferroic phase of doped delafossite CuFeO2 identified using inelastic neutron scattering
DOI:10.1103/PhysRevB.82.020404  JN:PHYSICAL REVIEW B  PY:2010
  TC:35  AU: Haraldsen, Jason T.;Ye, Feng;Fishman, Randy S.;Fernandez-Baca, Jaime A.;Yamaguchi, Yasuhiro;Kimura, Kenta;Kimura, Tsuyoshi;
7:5:12:2     Noncollinear magnetic phases of a triangular-lattice antiferromagnet and of doped CuFeO2
DOI:10.1103/PhysRevB.81.020402  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Fishman, Randy S.;Okamoto, Satoshi;
7:5:12:3     Magnons and electromagnons in a spin-lattice-coupled frustrated magnet CuFeO2 as seen via inelastic neutron scattering
DOI:10.1103/PhysRevB.84.184401  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Nakajima, Taro;Suno, Azusa;Mitsuda, Setsuo;Terada, Noriki;Kimura, Shojiro;Kaneko, Koji;Yamauchi, Hiroki;
7:5:12:4     Electromagnons in the Spin Collinear State of a Triangular Lattice Antiferromagnet
DOI:10.1103/PhysRevLett.105.097207  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:25  AU: Seki, S.;Kida, N.;Kumakura, S.;Shimano, R.;Tokura, Y.;
7:5:12:5     Mapping the magnetic phase diagram of the frustrated metamagnet CuFeO2
DOI:10.1103/PhysRevB.81.224420  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Lummen, T. T. A.;Strohm, C.;Rakoto, H.;van Loosdrecht, P. H. M.;
7:5:12:6     Magnetic interactions in the multiferroic phase of CuFe1-xGaxO2 (x=0.035) refined by inelastic neutron scattering with uniaxial-pressure control of domain structure
DOI:10.1103/PhysRevB.85.144405  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Nakajima, Taro;Mitsuda, Setsuo;Haraldsen, Jason T.;Fishman, Randy S.;Hong, Tao;Terada, Noriki;Uwatoko, Yoshiya;
7:5:12:7     Phase Diagram of a Geometrically Frustrated Triangular-Lattice Antiferromagnet in a Magnetic Field
DOI:10.1103/PhysRevLett.106.037206  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:12  AU: Fishman, Randy S.;
7:5:12:8     Effect of interlayer interactions and lattice distortions on the magnetic ground state and spin dynamics of a geometrically frustrated triangular-lattice antiferromagnet
DOI:10.1103/PhysRevB.82.144441  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Haraldsen, J. T.;Fishman, R. S.;
7:5:12:9     Spin-wave dynamics for the high-magnetic-field phases of the frustrated CuFeO2 antiferromagnet: Predictions for inelastic neutron scattering
DOI:10.1103/PhysRevB.86.024412  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Haraldsen, J. T.;Fishman, R. S.;Brown, G.;
7:5:12:10     Quantum spin fluctuations for a distorted incommensurate spiral
DOI:10.1103/PhysRevB.85.024411  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Fishman, Randy S.;
7:5:12:11     Monte Carlo and variational calculations of the magnetic phase diagram of CuFeO2
DOI:10.1103/PhysRevB.85.020405  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Fishman, Randy S.;Brown, Gregory;Haraldsen, Jason T.;
7:5:12:12     Multifrequency ESR measurements of the triangular lattice antiferromagnet CuFeO2 in high magnetic fields
DOI:10.1103/PhysRevB.84.104449  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Kimura, Shojiro;Fujita, Takahito;Nishihagi, Naoki;Yamaguchi, Hironori;Kashiwagi, Takanari;Hagiwara, Masayuki;Terada, Noriki;Sawai, Yoshiki;Kindo, Koichi;
7:5:12:13     Spin-driven bond order in a 1/5-magnetization plateau phase in the triangular lattice antiferromagnet CuFeO2
DOI:10.1103/PhysRevB.88.134414  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Nakajima, Taro;Terada, Noriki;Mitsuda, Setsuo;Bewley, Robert;
7:5:12:14     Spin-lattice coupling and helical-spin driven ferroelectric polarization in multiferroic CuFeO2
DOI:10.1063/1.3486158  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Zhong, Chonggui;Cao, Haixia;Fang, Jinghuai;Jiang, Xuefan;Ji, Xianming;Dong, Zhengchao;
7:5:12:15     Orbital topology, interlayer spin coupling, and magnetic anisotropy of the CuFeO2 compound
DOI:10.1103/PhysRevB.83.134422  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Malvestuto, M.;Bondino, F.;Magnano, E.;Lummen, T. T. A.;van Loosdrecht, P. H. M.;Parmigiani, F.;
7:5:12:16     Structural, magnetic, and ferroelectric properties of CuFe1-xMnxO2
DOI:10.1103/PhysRevB.87.064418  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Hayashi, K.;Fukatsu, R.;Nozaki, T.;Miyazaki, Y.;Kajitani, T.;
7:5:12:17     Electromagnon by chiral spin dynamics in the triangular lattice antiferromagnet
DOI:10.1103/PhysRevB.90.060413  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kimura, S.;Fujita, T.;Hagiwara, M.;Yamaguchi, H.;Kashiwagi, T.;Terada, N.;Sawada, Y.;Watanabe, K.;
7:5:12:18     Electric polarization along the c axis in the ferroelectric helimagnetic phase of CuFe1-xGaxO2 (x=0.035)
DOI:10.1103/PhysRevB.90.085109  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kaneko, Chikafumi;Nakajima, Taro;Mitsuda, Setsuo;Tanaka, Yoshikazu;Terada, Noriki;
7:5:12:19     Unusual doping effect of non-magnetic ion on magnetic properties of CuFe1-xGaxO2
DOI:10.1016/j.jmmm.2014.07.014  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Shi, Liran;Jin, Zhao;Chen, Borong;Xia, Nianming;Zuo, Huakun;Wang, Yeshuai;Ouyang, Zhongwen;Xia, Zhengcai;
7:5:12:20     Charge disproportionation associated with spin ordering in delafossite CuFeO2 as seen via resonant x-ray diffraction
DOI:10.1103/PhysRevB.81.064424  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Terada, N.;Nakajima, T.;Mitsuda, S.;Tanaka, Y.;Mamiya, H.;Kitazawa, H.;
7:5:12:21     Phase separation in thermoelectric delafossite CuFe1-xNixO2 observed by soft x-ray magnetic circular dichroism
DOI:10.1063/1.3609248  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Kang, J. -S.;Kim, D. H.;Hwang, Jihoon;Lee, Eunsook;Nozaki, T.;Hayashi, K.;Kajitani, T.;Park, B. -G.;Kim, J. -Y.;Min, B. I.;
7:5:12:22     Density Functional Investigation of the Difference in the Magnetic Structures of the Layered Triangular Antiferromagnets CuFeO2 and AgCrO2
DOI:10.1021/cm2011567  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:0  AU: Zhang, Yuemei;Kan, Erjun;Whangbo, Myung-Hwan;
7:5:12:23     The enhanced spontaneous dielectric polarization in Ga doped CuFeO2
DOI:10.1063/1.4899243  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Shi, Liran;Xia, Zhengcai;Wei, Meng;Huang, Junwei;Chen, Borong;Long, Zhuo;Shang, Cui;Ouyang, Zhongwen;Xia, Nianming;
7:5:12:24     Dynamic behavior of magnetoelectric coupling of CuFeO2 induced by a high magnetic field
DOI:10.1063/1.4868578  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Xia, Nianming;Shi, Liran;Xia, Zhengcai;Chen, Borong;Jin, Zhao;Wang, Yeshuai;Ouyang, Zhongwen;Zuo, Huakun;Shen, Yining;
7:5:12:25     Incommensurate Orbital Modulation behind Ferroelectricity in CuFeO2
DOI:10.1103/PhysRevLett.109.127205  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: Tanaka, Yoshikazu;Terada, Noriki;Nakajima, Taro;Taguchi, Munetaka;Kojima, Taro;Takata, Yasutaka;Mitsuda, Setsuo;Oura, Masaki;Senba, Yasunori;Ohashi, Haruhiko;Shin, Shik;
7:5:12:26     Cation Distribution Dependence on Thermoelectric Properties of Doped Spinel M0.6Fe2.4O4
DOI:10.2320/matertrans.M2012023  JN:MATERIALS TRANSACTIONS  PY:2012
  TC:0  AU: Nozaki, Tomohiro;Hayashi, Kei;Miyazaki, Yuzuru;Kajitani, Tsuyoshi;
7:5:12:27     Control of ferroelectric polarization via uniaxial pressure in the spin-lattice-coupled multiferroic CuFe1-xGaxO2
DOI:10.1103/PhysRevB.83.220101  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Nakajima, Taro;Mitsuda, Setsuo;Nakamura, Takashi;Ishii, Hajime;Haku, Tendai;Honma, Yuki;Kosaka, Masashi;Aso, Naofumi;Uwatoko, Yoshiya;
7:5:12:28     Multiferroic phase of doped delafossite CuFeO2 identified using inelastic neutron scattering (vol 82, 020404, 2010)
DOI:10.1103/PhysRevB.82.029901  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Haraldsen, Jason T.;Ye, Feng;Fishman, Randy S.;Fernandez-Baca, Jaime A.;Yamaguchi, Yasuhiro;Kimura, Kenta;Kimura, Tsuyoshi;
7:5:12:29     Spin-driven bond order in a 1/5-magnetization plateau phase in the triangular lattice antiferromagnet CuFeO2 (vol 88, 134414, 2013)
DOI:10.1103/PhysRevB.89.019901  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Nakajima, Taro;Terada, Noriki;Mitsuda, Setsuo;Bewley, Robert;
7:5:12:30     Global stability and the magnetic phase diagram of a geometrically frustrated triangular lattice antiferromagnet
DOI:10.1063/1.3553780  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Fishman, Randy S.;Haraldsen, Jason T.;
7:5:12:31     Soft x-ray synchrotron radiation spectroscopy study of CuFe1-xNixO2 (0 <= x <= 0.03) delafossite oxides
DOI:10.1063/1.3561041  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Kim, D. H.;Hwang, J. H.;Lee, K. H.;Kang, J. -S.;Nozaki, T.;Hayashi, K.;Kajitani, T.;Park, B. -G.;Kim, J. -Y.;Min, B. I.;
7:5:13:1:1     Spin-state crossover in multiferroic Ca3Co2-xMnxO6
DOI:10.1103/PhysRevB.81.092402  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Flint, R.;Yi, H. -T.;Chandra, P.;Cheong, S. -W.;Kiryukhin, V.;
7:5:13:1:2     Short-range ferromagnetic correlations in the spin-chain compound Ca3CoMnO6
DOI:10.1103/PhysRevB.84.054435  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Ouyang, Z. W.;Xia, N. M.;Wu, Y. Y.;Sheng, S. S.;Chen, J.;Xia, Z. C.;Li, L.;
7:5:13:1:3     Anomalies of inverse direct current susceptibility in spin-chain compounds Ca3Co2-xMnxO6
DOI:10.1063/1.3671025  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Sheng, S. S.;Ouyang, Z. W.;Xia, N. M.;Chen, J.;Wu, Y. Y.;Xia, Z. C.;Li, L.;
7:5:13:1:4     High-field magnetization and ESR studies of spin-chain compound Ca3CoMnO6
DOI:10.1016/j.jmmm.2013.05.042  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Ruan, M. Y.;Ouyang, Z. W.;Sheng, S. S.;Shi, X. M.;Guo, Y. M.;Cheng, J. J.;Xia, Z. C.;
7:5:13:1:5     Multiferroicity with coexisting isotropic and anisotropic spins in Ca3Co2-xMnxO6
DOI:10.1103/PhysRevB.89.060404  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kim, Jae Wook;Kamiya, Y.;Mun, Eun Deok;Jaime, M.;Harrison, N.;Thompson, J. D.;Kiryukhin, V.;Yi, H. T.;Oh, Y. S.;Cheong, S. -W.;Batista, C. D.;Zapf, V. S.;
7:5:13:1:6     Magnetoelectric coupling in Ca3CoMnO6
DOI:10.1063/1.3499262  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Kaushik, S. D.;Rayaprol, S.;Saha, J.;Mohapatra, N.;Siruguri, V.;Babu, P. D.;Patnaik, S.;Sampathkumaran, E. V.;
7:5:13:1:7     Effect of Mn doping on the 1/3 magnetization step in Ca3Co2-xMnxO6
DOI:10.1016/j.jmmm.2013.04.040  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Ruan, M. Y.;Ouyang, Z. W.;Sheng, S. S.;Shi, X. M.;Xia, Z. C.;Rao, G. H.;
7:5:13:1:8     Crystal structure, magnetic properties and ESR spectra of Ca3Co2-xFexO6
DOI:10.1016/j.jallcom.2011.09.010  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Chen, J.;Ouyang, Z. W.;Xia, N. M.;Sheng, S. S.;Wu, Y. Y.;Xia, Z. C.;Li, L.;
7:5:13:1:9     Magnetic anisotropy and spin-glass behavior in spin-chain compound Ca3Co1.62Mn0.38O6
DOI:10.1016/j.jallcom.2012.12.133  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Sheng, S. S.;Ouyang, Z. W.;Chen, J.;Ruan, M. Y.;Shi, X. M.;Xia, Z. C.;
7:5:13:1:10     Spin-glass-like freezing in spin-chain compounds Ca3Co2-xMnxO6: Effect of disorder
DOI:10.1063/1.4767225  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Ouyang, Z. W.;Sheng, S. S.;Chen, J.;Shi, X. M.;Ruan, M. Y.;Xia, Z. C.;Li, L.;
7:5:13:1:11     High-field magnetization study of spin-chain compounds Ca3Co2 (-) xMnxO6
DOI:10.1016/j.jmmm.2014.02.088  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Ruan, M. Y.;Ouyang, Z. W.;Sheng, S. S.;Shi, X. M.;Guo, Y. M.;Cheng, J. J.;Rao, G. H.;Xia, Z. C.;
7:5:13:1:12     Effect of nonmagnetic Sc ion on the intrachain coupling in spin-chain compounds Ca3Co2-xScxO6
DOI:10.1063/1.3686655  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Ruan, M. Y.;Ouyang, Z. W.;Chen, J.;Sheng, S. S.;Xia, Z. C.;Li, L.;
7:5:13:1:13     Raman study of Ca3Co2O6 single crystals
DOI:10.1063/1.3512899  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Gohil, Smita;Iyer, Kartik K.;Aswathi, P.;Ghosh, Shankar;Sampathkumaran, E. V.;
7:5:13:1:14     Magnetocapacitance in Ca3CoMnO6
DOI:10.1063/1.3565199  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Kaushik, S. D.;Rayaprol, S.;Saha, J.;Mohapatra, N.;Siruguri, V.;Babu, P. D.;Patnaik, S.;
7:5:13:2:1     Slow Magnetic Order-Order Transition in the Spin Chain Antiferromagnet Ca3Co2O6
DOI:10.1103/PhysRevLett.106.197204  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:23  AU: Agrestini, S.;Fleck, C. L.;Chapon, L. C.;Mazzoli, C.;Bombardi, A.;Lees, M. R.;Petrenko, O. A.;
7:5:13:2:2     Formation of Magnetic Microphases in Ca3Co2O6
DOI:10.1103/PhysRevLett.109.067204  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:14  AU: Kamiya, Y.;Batista, C. D.;
7:5:13:2:3     Macroscopic phase diagram and magnetocaloric study of metamagnetic transitions in the spin chain system Ca3Co2O6
DOI:10.1103/PhysRevB.89.144414  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Lampen, P.;Bingham, N. S.;Phan, M. H.;Srikanth, H.;Yi, H. T.;Cheong, S. W.;
7:5:13:2:4     Spin correlations in Ca3Co2O6: Polarized-neutron diffraction and Monte Carlo study
DOI:10.1103/PhysRevB.90.014411  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Paddison, Joseph A. M.;Agrestini, Stefano;Lees, Martin R.;Fleck, Catherine L.;Deen, Pascale P.;Goodwin, Andrew L.;Stewart, J. Ross;Petrenko, Oleg A.;
7:5:13:2:5     NMR study of magnetic order, metamagnetic transitions, and low-temperature spin freezing in Ca3Co2O6
DOI:10.1103/PhysRevB.83.104408  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Allodi, G.;De Renzi, R.;Agrestini, S.;Mazzoli, C.;Lees, M. R.;
7:5:13:2:6     Exchange interactions in Ca3Co2O6 probed locally by NMR
DOI:10.1103/PhysRevB.89.104401  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Allodi, G.;Santini, P.;Carretta, S.;Agrestini, S.;Mazzoli, C.;Bombardi, A.;Lees, M. R.;De Renzi, R.;
7:5:13:2:7     Brownmillerite Ca2Co2O5: Synthesis, Stability, and Re-entrant Single Crystal to Single Crystal Structural Transitions
DOI:10.1021/cm503873x  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:3  AU: Zhang, Junjie;Zheng, Hong;Malliakas, Christos D.;Allred, Jared M.;Ren, Yang;Li, Qing'an;Han, Tian-Heng;Mitchell, J. F.;
7:5:13:2:8     Anisotropic spin dynamics in the frustrated chain Ca3Co2O6 detected by single-crystal Co-59 NMR
DOI:10.1103/PhysRevB.82.094430  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Shimizu, Yasuhiro;Horibe, Munehisa;Nanba, Hiroshi;Takami, Tsuyoshi;Itoh, Masayuki;
7:5:13:2:9     Anisotropy modulated stepwise magnetization in triangular Heisenberg antiferromagnet
DOI:10.1016/j.jmmm.2011.07.030  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:1  AU: Yao, Xiaoyan;Liu, Jun-Ming;Lo, Veng Cheong;
7:5:13:2:10     Defect dependent multiple magnetization plateaus in frustrated spin-chain cobaltate
DOI:10.1016/j.jmmm.2013.02.037  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Hu, Yong;Wu, Guozhen;Liu, Yan;Yang, Xiaolong;Du, An;
7:5:13:2:11     One-dimensional dispersive magnon excitation in the frustrated spin-2 chain system Ca3Co2O6
DOI:10.1103/PhysRevB.88.224403  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:5:13:2:12     Two-dimensional and three-dimensional simulation of magnetic relaxation in frustrated spin-chain systems: Ca3Co2O6
DOI:10.1103/PhysRevB.83.092404  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Kudasov, Yu. B.;Korshunov, A. S.;Pavlov, V. N.;Maslov, D. A.;
7:5:13:2:13     Quantum Monte Carlo study of molecular polarization and antiferroelectric ordering in squaric acid crystals
DOI:10.1103/PhysRevB.84.064120  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Ishizuka, Hiroaki;Motome, Yukitoshi;Furukawa, Nobuo;Suzuki, Sei;
7:5:13:2:14     Magnetic domain growth in geometrically frustrated Ising antiferromagnets Co1-xMgxNb2O6 (x=0 and 0.004) as seen via time-resolved neutron diffraction measurements
DOI:10.1103/PhysRevB.90.064431  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Nakajima, Taro;Mitsuda, Setsuo;Inomoto, Yu;Prokes, Karel;Sikolenko, Vadim;Gerischer, Sebastian;Kobayashi, Satoru;
7:5:13:2:15     Across the Structural Re-Entrant Transition in BaFe2(PO4)(2): Influence of the Two-Dimensional Ferromagnetism
DOI:10.1021/ja404697b  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2013
  TC:3  AU: David, Renald;Pautrat, Alain;Filimonov, Dmitry;Kabbour, Houria;Vezin, Herve;Whangbo, Myung-Hwan;Mentre, Olivier;
7:5:13:2:16     Slow Magnetic Order-Order Transition in the Spin Chain Antiferromagnet Ca3Co2O6 (vol 106, 197204, 2011)
DOI:10.1103/PhysRevLett.107.239902  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:0  AU: Agrestini, S.;Fleck, C. L.;Chapon, L. C.;Mazzoli, C.;Bombardi, A.;Lees, M. R.;Petrenko, O. A.;
7:5:13:3:1     Spin frustration destruction and ferroelectricity modulation in Ca3CoMnO6: Effects of Mn deficiency
DOI:10.1063/1.3670967  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Lin, L.;Guo, Y. J.;Xie, Y. L.;Dong, S.;Yan, Z. B.;Liu, J. -M.;
7:5:13:3:2     Influence of Co:Mn ratio on multiferroicity of Ca3Co2-xMnxO6 around x similar to 1
DOI:10.1063/1.3464289  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Ding, P.;Li, L.;Guo, J.;He, Q. Y.;Gao, X. S.;Liu, J. -M.;
7:5:13:3:3     Enhanced multiferroicity in Mg-doped Ca3Co2-xMnxO6
DOI:10.1063/1.3292584  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:9  AU: Li, L.;Luo, W. Z.;Guo, Y. J.;Li, S. Z.;Luo, S. J.;Wang, K. F.;Liu, J. -M.;
7:5:13:3:4     Ferroelectricity enhanced by disorder in collinear-magnetism-induced multiferroic state
DOI:10.1063/1.4768444  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Yao, Xiaoyan;
7:5:13:4:1     Stabilization of the spin density wave structure with rare-earth substitution in Ca3Co2O6
DOI:10.1103/PhysRevB.87.094411  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Jain, Anil;Yusuf, S. M.;Meena, S. S.;Ritter, Clemens;
7:5:13:4:2     Short-range and long-range incommensurate magnetic ordering in the frustrated antiferromagnets Ca3Co2-xFexO6: A neutron diffraction study
DOI:10.1103/PhysRevB.83.184425  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Jain, Anil;Yusuf, S. M.;
7:5:14:1     Spin dynamics in the geometrically frustrated multiferroic CuCrO2
DOI:10.1103/PhysRevB.81.104411  JN:PHYSICAL REVIEW B  PY:2010
  TC:35  AU: Poienar, M.;Damay, F.;Martin, C.;Robert, J.;Petit, S.;
7:5:14:2     Magnetic excitations in the geometric frustrated multiferroic CuCrO2
DOI:10.1103/PhysRevB.84.094448  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Frontzek, M.;Haraldsen, J. T.;Podlesnyak, A.;Matsuda, M.;Christianson, A. D.;Fishman, R. S.;Sefat, A. S.;Qiu, Y.;Copley, J. R. D.;Barilo, S.;Shiryaev, S. V.;Ehlers, G.;
7:5:14:3     Exciton-magnon transitions in the frustrated chromium antiferromagnets CuCrO2, alpha-CaCr2O4, CdCr2O4, and ZnCr2O4
DOI:10.1103/PhysRevB.87.224424  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Schmidt, M.;Wang, Zhe;Kant, Ch.;Mayr, F.;Toth, S.;Islam, A. T. M. N.;Lake, B.;Tsurkan, V.;Loidl, A.;Deisenhofer, J.;
7:5:14:4     High magnetic field evolution of ferroelectricity in CuCrO2
DOI:10.1103/PhysRevB.89.054411  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Mun, Eundeok;Frontzek, M.;Podlesnyak, A.;Ehlers, G.;Barilo, S.;Shiryaev, S. V.;Zapf, Vivien S.;
7:5:14:5     Helical magnetic state in the distorted triangular lattice of alpha-CaCr2O4
DOI:10.1103/PhysRevB.83.024409  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Chapon, L. C.;Manuel, P.;Damay, F.;Toledano, P.;Hardy, V.;Martin, C.;
7:5:14:6     Magnetic couplings in the quasi-2D triangular Heisenberg antiferromagnets alpha-ACr(2)O(4) (A=Ca, Sr, Ba)
DOI:10.1016/j.jmmm.2012.10.047  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Hardy, V.;Martin, C.;Damay, F.;Andre, G.;
7:5:14:7     Magnetic Soft Modes in the Distorted Triangular Antiferromagnet alpha-CaCr2O4
DOI:10.1103/PhysRevLett.109.127203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:9  AU: Toth, S.;Lake, B.;Hradil, K.;Guidi, T.;Rule, K. C.;Stone, M. B.;Islam, A. T. M. N.;
7:5:14:8     Magnetic-field-induced phases in anisotropic triangular antiferromagnets: Application to CuCrO2
DOI:10.1103/PhysRevB.89.220405  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Lin, Shi-Zeng;Barros, Kipton;Mun, Eundeok;Kim, Jae-Wook;Frontzek, Matthias;Barilo, S.;Shiryaev, S. V.;Zapf, Vivien S.;Batista, Cristian D.;
7:5:14:9     Spiral-plane flop probed by ESR in the multiferroic triangular-lattice antiferromagnet CuCrO2
DOI:10.1103/PhysRevB.81.033104  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Yamaguchi, H.;Ohtomo, S.;Kimura, S.;Hagiwara, M.;Kimura, K.;Kimura, T.;Okuda, T.;Kindo, K.;
7:5:14:10     120 degrees helical magnetic order in the distorted triangular antiferromagnet alpha-CaCr2O4
DOI:10.1103/PhysRevB.84.054452  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Toth, S.;Lake, B.;Kimber, S. A. J.;Pieper, O.;Reehuis, M.;Islam, A. T. M. N.;Zaharko, O.;Ritter, C.;Hill, A. H.;Ryll, H.;Kiefer, K.;Argyriou, D. N.;Williams, A. J.;
7:5:14:11     Local distortions in multiferroic AgCrO2 triangular spin lattice
DOI:10.1103/PhysRevB.84.014434  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Lopes, A. M. L.;Oliveira, G. N. P.;Mendonca, T. M.;Agostinho Moreira, J.;Almeida, A.;Araujo, J. P.;Amaral, V. S.;Correia, J. G.;
7:5:14:12     Origin of ferroelectric polarization in spiral magnetic structure of MnWO4
DOI:10.1103/PhysRevB.81.212406  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Shanavas, K. V.;Choudhury, Debraj;Dasgupta, I.;Sharma, Surinder M.;Sarma, D. D.;
7:5:14:13     Quantum spin fluctuations and ellipticity for a triangular-lattice antiferromagnet
DOI:10.1103/PhysRevB.84.052405  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Fishman, Randy S.;
7:5:14:14     Multiferroicity in geometrically frustrated alpha-MCr2O4 systems (M = Ca, Sr, Ba)
DOI:10.1103/PhysRevB.86.064408  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Zhao, Li.;Lan, Tian-Wey;Wang, Kuen-Jen;Chien, Chia-Hua;Hung, Tsu-Lien;Luo, Jiu-Yong;Chao, Wei-Hsiang;Chang, Chung-Chieh;Chen, Yang-Yuan;Wu, Maw-Kuen;Martin, Christine;
7:5:14:15     Floating-zone growth and characterization of triangular lattice antiferromagnetic alpha-SrCr2O4 crystals
DOI:10.1016/j.jcrysgro.2014.01.063  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:0  AU: Zhao, Li;Wang, Kuen-Jen;Wen, Min-Hsueh;Wu, Maw-Kuen;
7:5:14:16     Multiferroicity and magnetoelectric coupling in alpha-CaCr2O4
DOI:10.1103/PhysRevB.84.064129  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Singh, Kiran;Simon, Charles;Toledano, Pierre;
7:5:14:17     Domain rearrangement and spin-spiral-plane flop as sources of magnetoelectric effects in delafossite CuCrO2
DOI:10.1103/PhysRevB.81.100406  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Soda, Minoru;Kimura, Kenta;Kimura, Tsuyoshi;Hirota, Kazuma;
7:5:14:18     Magnetic dilution and steric effects in the multiferroic delafossite CuCrO2
DOI:10.1103/PhysRevB.86.054437  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Pachoud, E.;Singh, K.;Breard, Y.;Martin, C.;Andre, G.;Hardy, V.;Simon, Ch.;Maignan, A.;
7:5:14:19     ESR of the quasi-two-dimensional antiferromagnet CuCrO2 with a triangular lattice
DOI:10.1103/PhysRevB.88.144403  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Vasiliev, A. M.;Prozorova, L. A.;Svistov, L. E.;Tsurkan, V.;Dziom, V.;Shuvaev, A.;Pimenov, Anna;Pimenov, A.;
7:5:14:20     Magnetoelectric effects in an organometallic quantum magnet
DOI:10.1103/PhysRevB.83.140405  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Zapf, V. S.;Sengupta, P.;Batista, C. D.;Nasreen, F.;Wolff-Fabris, F.;Paduan-Filho, A.;
7:5:14:21     Ab initio study of the relation between electric polarization and electric field gradients in ferroelectrics
DOI:10.1103/PhysRevB.86.035145  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Goncalves, J. N.;Stroppa, A.;Correia, J. G.;Butz, T.;Picozzi, S.;Fenta, A. S.;Amaral, V. S.;
7:5:14:22     First-order ferroelastic transition in a magnetoelectric multiferroic: CuCrO2
DOI:10.1103/PhysRevB.88.224104  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:5:14:23     Experimental confirmation of spin gap in antiferromagnetic alternating spin-3/2 chain substances RCrGeO5 (R=Y or Sm-154) by inelastic neutron scattering experiments
DOI:10.1103/PhysRevB.90.024416  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Hase, Masashi;Soda, Minoru;Masuda, Takatsugu;Kawana, Daichi;Yokoo, Tetsuya;Itoh, Shinichi;Matsuo, Akira;Kindo, Koichi;Kohno, Masanori;
7:5:14:24     Proposed third long-range order in multiferroics
DOI:10.1103/PhysRevB.81.224414  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Hu, C. D.;
7:5:14:25     High magnetic field evolution of ferroelectricity in CuCrO2 (vol 89, 054411, 2014)
DOI:10.1103/PhysRevB.89.099901  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Mun, Eundeok;Frontzek, M.;Podlesnyak, A.;Ehlers, G.;Barilo, S.;Shiryaev, S. V.;Zapf, Vivien S.;
7:5:15:1     Theory of Electromagnons in the Multiferroic Mn Perovskites: The Vital Role of Higher Harmonic Components of the Spiral Spin Order
DOI:10.1103/PhysRevLett.104.177206  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:42  AU: Mochizuki, Masahito;Furukawa, Nobuo;Nagaosa, Naoto;
7:5:15:2     Theory of Magnetic Switching of Ferroelectricity in Spiral Magnets
DOI:10.1103/PhysRevLett.105.187601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:21  AU: Mochizuki, Masahito;Furukawa, Nobuo;
7:5:15:3     Terahertz magnetoelectric response via electromagnons in magnetic oxides
DOI:10.1016/j.jmmm.2012.02.078  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:7  AU: Kida, N.;Tokura, Y.;
7:5:15:4     Evidence for Electroactive Excitation of the Spin Cycloid in TbMnO3
DOI:10.1103/PhysRevLett.104.097202  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:25  AU: Shuvaev, A. M.;Travkin, V. D.;Ivanov, V. Yu.;Mukhin, A. A.;Pimenov, A.;
7:5:15:5     Theoretically Predicted Picosecond Optical Switching of Spin Chirality in Multiferroics
DOI:10.1103/PhysRevLett.105.147202  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:19  AU: Mochizuki, Masahito;Nagaosa, Naoto;
7:5:15:6     Nonmagnetic B-site substitution induced two-phase coexistence in multiferroic manganites: Monte Carlo simulation
DOI:10.1063/1.3594711  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Tao, Y. M.;Qin, M. H.;Dong, S.;Gao, X. S.;Liu, J. -M.;
7:5:15:7     Infrared reflectivity of the phonon spectra in multiferroic TbMnO3
DOI:10.1103/PhysRevB.82.144309  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Schleck, R.;Moreira, R. L.;Sakata, H.;Lobo, R. P. S. M.;
7:5:15:8     Multiferroic response to magnetic field in orthorhombic manganites
DOI:10.1063/1.3565241  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Qin, M. H.;Tao, Y. M.;Dong, S.;Zhao, H. B.;Gao, X. S.;Liu, J-M;
7:5:15:9     Magnetic Field Induced Dehybridization of the Electromagnons in Multiferroic TbMnO3
DOI:10.1103/PhysRevLett.107.027202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:10  AU: Rovillain, P.;Cazayous, M.;Gallais, Y.;Measson, M-A.;Sacuto, A.;Sakata, H.;Mochizuki, M.;
7:5:15:10     Magnetoelectric excitations in multiferroic TbMnO3 by Raman scattering
DOI:10.1103/PhysRevB.81.054428  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Rovillain, P.;Cazayous, M.;Gallais, Y.;Sacuto, A.;Measson, M-A.;Sakata, H.;
7:5:15:11     Electromagnon and phonon excitations in multiferroic TbMnO3
DOI:10.1103/PhysRevB.86.014437  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Rovillain, P.;Liu, J.;Cazayous, M.;Gallais, Y.;Measson, M-A.;Sakata, H.;Sacuto, A.;
7:5:15:12     Improvements of dielectric properties of Fe doped TbMnO3
DOI:10.1016/j.ceramint.2014.04.060  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Xu, Jianxun;Cui, Yimin;Xu, Huaizhe;
7:5:15:13     Magnetic anisotropy and anomalous transitions in TbMnO3 thin films
DOI:10.1063/1.4754544  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Cui, Yimin;Tian, Yufeng;Shan, Aixian;Chen, Chinping;Wang, Rongming;
7:5:15:14     Multiferroic properties in orthorhombic perovskite manganites: Monte Carlo simulation
DOI:10.1063/1.3689162  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Qin, M. H.;Tao, Y. M.;Dong, S.;Zeng, M.;Wu, S. J.;Zhao, H. B.;Gao, X. S.;Liu, J. -M.;
7:5:15:15     Relaxation dynamics of multiferroic domain walls in DyMnO3 with cycloidal spin order
DOI:10.1103/PhysRevB.83.054413  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Kagawa, F.;Onose, Y.;Kaneko, Y.;Tokura, Y.;
7:5:15:16     Multiferroic phase competitions in perovskite manganite thin films
DOI:10.1063/1.3682079  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Qin, M. H.;Tao, Y. M.;Zeng, M.;Gao, X. S.;Wu, S. J.;Dong, S.;Liu, J. -M.;
7:5:15:17     Magnetoelectric susceptibility tensor of multiferroic TbMnO3 with cycloidal antiferromagnetic structure in external field
DOI:10.1063/1.4798820  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Bychkov, Igor V.;Kuzmin, Dmitry A.;Lamekhov, Sergey J.;Shavrov, Vladimir G.;
7:5:15:18     Sinusoidal electromagnon in RMnO3: Indication of anomalous magnetoelectric coupling
DOI:10.1103/PhysRevB.85.104412  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Stenberg, Markku P. V.;de Sousa, Rogerio;
7:5:15:19     Dielectric and impedance analysis of La doped-TbMnO3
DOI:10.1016/j.jallcom.2012.09.005  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:8  AU: Zhang, Yingtang;Tong, Ting;Kinsman, William;Jiang, Peng;Yin, Guilai;Li, Shengtao;
7:5:15:20     Soft-mode behavior of electromagnons in multiferroic manganite
DOI:10.1103/PhysRevB.82.174417  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Shuvaev, A. M.;Hemberger, J.;Niermann, D.;Schrettle, F.;Loidl, A.;Ivanov, V. Yu.;Travkin, V. D.;Mukhin, A. A.;Pimenov, A.;
7:5:15:21     Observation of anomalous phonons in orthorhombic rare-earth manganites
DOI:10.1063/1.3533022  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:0  AU: Gao, P.;Chen, H. Y.;Tyson, T. A.;Liu, Z. X.;Bai, J. M.;Wang, L. P.;Choi, Y. J.;Cheong, S. -W.;
7:5:15:22     Multiferroic Materials and their Properties
DOI:10.1080/10584587.2011.616397  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:1  AU: Kumar, Pradeep;
7:5:15:23     Photoacoustic effect in a sinusoidally modulated structure
DOI:10.1063/1.3703606  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Wu, Binbin;Diebold, Gerald J.;
7:5:16:1     Multiferroics with Spiral Spin Orders
DOI:10.1002/adma.200901961  JN:ADVANCED MATERIALS  PY:2010
  TC:209  AU: Tokura, Yoshinori;Seki, Shinichiro;
7:5:16:2     Mechanism of interfacial magnetoelectric coupling in composite multiferroics
DOI:10.1103/PhysRevB.90.054423  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Jia, C. -L.;Wei, T. -L.;Jiang, C. -J.;Xue, D. -S.;Sukhov, A.;Berakdar, J.;
7:5:16:3     Thermoelectric effect of multiferroic oxide interfaces
DOI:10.1063/1.3549863  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Jia, Chenglong;Berakdar, Jamal;
7:5:16:4     Anisotropic thermoelectric effect in helimagnetic tunnel junctions
DOI:10.1063/1.3590269  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Jia, Chenglong;Berakdar, Jamal;
7:5:16:5     Tunable anisotropic magnetoelectric effect in helimagnetic tunnel junctions with interface Rashba spin-orbit interaction
DOI:10.1063/1.4816756  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Wang, Yan;Zhang, Ning;Berakdar, Jamal;Jia, Chenglong;
7:5:16:6     Tunneling anisotropic magnetoresistance of helimagnet tunnel junctions
DOI:10.1103/PhysRevB.81.052406  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Jia, Chenglong;Berakdar, Jamal;
7:5:16:7     Magnetoelectric responses induced by domain rearrangement and spin structural change in triangular-lattice helimagnets NiI2 and CoI2
DOI:10.1103/PhysRevB.87.014429  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kurumaji, T.;Seki, S.;Ishiwata, S.;Murakawa, H.;Kaneko, Y.;Tokura, Y.;
7:5:16:8     Coupling of Magnetic and Ferroelectric Hysteresis by a Multicomponent Magnetic Structure in Mn2GeO4
DOI:10.1103/PhysRevLett.108.077204  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: White, J. S.;Honda, T.;Kimura, K.;Kimura, T.;Niedermayer, Ch.;Zaharko, O.;Poole, A.;Roessli, B.;Kenzelmann, M.;
7:5:16:9     Magnetic Biasing of a Ferroelectric Hysteresis Loop in a Multiferroic Orthoferrite
DOI:10.1103/PhysRevLett.112.037203  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:1  AU: Tokunaga, Y.;Taguchi, Y.;Arima, T.;Tokura, Y.;
7:5:16:10     Multiferroicity in NiBr2 with long-wavelength cycloidal spin structure on a triangular lattice
DOI:10.1103/PhysRevB.84.060406  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Tokunaga, Y.;Okuyama, D.;Kurumaji, T.;Arima, T.;Nakao, H.;Murakami, Y.;Taguchi, Y.;Tokura, Y.;
7:5:16:11     Spin transmission control in helical magnetic fields
DOI:10.1103/PhysRevB.86.165407  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Saarikoski, Henri;Dollinger, Tobias;Richter, Klaus;
7:5:16:12     Magnetic anisotropy and magnetodielectric coefficients in Cr2O3 and Fe0.4Cr1.6O3
DOI:10.1016/j.jallcom.2014.06.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Banerjee, I.;Kim, Hyungsuk K. D.;Pisani, D.;Mohanchandra, K. P.;Carman, Gregory P.;
7:5:17:1     Multiferroic behavior of lanthanum orthoferrite (LaFeO3)
DOI:10.1016/j.matlet.2009.11.037  JN:MATERIALS LETTERS  PY:2010
  TC:41  AU: Acharya, S.;Mondal, J.;Ghosh, S.;Roy, S. K.;Chakrabarti, P. K.;
7:5:17:2     Origin of colossal dielectric response in LaFeO3
DOI:10.1016/j.actamat.2010.10.066  JN:ACTA MATERIALIA  PY:2011
  TC:40  AU: Idrees, M.;Nadeem, M.;Atif, M.;Siddique, M.;Mehmood, M.;Hassan, M. M.;
7:5:17:3     High pressure treated ZnO ceramics towards giant dielectric constants
DOI:10.1039/c4ta03434a  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:3  AU: Li, Xuhai;Xu, Liang;Liu, Lixin;Wang, Yuan;Cao, Xiuxia;Huang, Yuanjie;Meng, Chuanmin;Wang, Zhigang;
7:5:17:4     Small polaronic hole hopping mechanism and Maxwell-Wagner relaxation in NdFeO3
DOI:10.1063/1.4754866  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:14  AU: Ahmad, I.;Akhtar, M. J.;Younas, M.;Siddique, M.;Hasan, M. M.;
7:5:17:5     Electric transport through perovskite La(Fe, Ga)O-3 nanowires formed by electrospinning
DOI:10.1063/1.4897992  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Moon, Taeho;Lee, Won-Yong;Choi, Chel-Jong;Yoon, Jong-Won;
7:5:17:6     Impedance spectroscopic investigation of electro active regions, conduction mechanism and origin of colossal dielectric constant in Nd1-xSrxFeO3 (0.1 <= x <= 0.5)
DOI:10.1016/j.materresbull.2014.08.046  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Ahmad, I.;Akhtar, M. J.;Hasan, M. M.;
7:5:17:7     Dielectric relaxation with polaronic and variable range hopping mechanisms of grains and grain boundaries in Pr0.8Ca0.2MnO3
DOI:10.1063/1.4767366  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Shah, Matiullah;Nadeem, M.;Atif, M.;
7:5:17:8     Jahn-Teller assisted polaronic hole hopping as a charge transport mechanism in CuO nanograins
DOI:10.1063/1.3702465  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Younas, M.;Nadeem, M.;Idrees, M.;Akhtar, M. J.;
7:5:17:9     Change of Mott variable range to small polaronic hole hopping conduction mechanism and formation of Schottky barriers in Nd0.9Sr0.1FeO3
DOI:10.1063/1.4813782  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Ahmad, I.;Akhtar, M. J.;Khan, R. T. A.;Hasan, M. M.;
7:5:17:10     Physics of the multi-functionality of lanthanum ferrite ceramics
DOI:10.1063/1.4879899  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Bhargav, K. K.;Ram, S.;Majumder, S. B.;
7:5:17:11     Multiferroic behavior, enhanced magnetization and exchange bias effect of Zn substituted nanocrystalline LaFeO3 (La(1-x)ZnxFeO3, x=0.10, and 0.30)
DOI:10.1016/j.jmmm.2012.09.063  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:15  AU: Mukhopadhyay, K.;Mahapatra, A. S.;Chakrabarti, P. K.;
7:5:17:12     Enhanced magnetic behavior of Al substituted LaFeO3 (La((1-x))A1(x)FeO(3), x=0.10 and 0.30)
DOI:10.1016/j.matlet.2011.01.049  JN:MATERIALS LETTERS  PY:2011
  TC:10  AU: Acharya, S.;Deb, A. K.;Das, D.;Chakrabarti, P. K.;
7:5:17:13     Metal-insulator transition in ZnO nanopowder during thermal cycling by impedance spectroscopy
DOI:10.1063/1.3431298  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:6  AU: Nadeem, M.;Farooq, Amina;Shin, T. J.;
7:5:17:14     Dielectric relaxation of Y1-xRxFeO3 (R = Dy, Er, x=0, 0.5)
DOI:10.1016/j.jallcom.2013.03.120  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Das, Indrani;Chanda, Sadhan;Dutta, Alo;Banerjee, Sourish;Sinha, T. P.;
7:5:17:15     Polaronic relaxation in LaFeO3
DOI:10.1016/j.matlet.2012.08.079  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: Chen, C.;Xu, K. B.;Cui, Y. M.;Wang, C. C.;
7:5:17:16     Dielectric relaxation of samarium aluminate
DOI:10.1007/s00339-013-7766-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:4  AU: Sakhya, Anup Pradhan;Dutta, Alo;Sinha, T. P.;
7:5:17:17     Origin of anomalous octahedral distortions and collapse of magnetic ordering in Nd1-xSrxFeO3 (0 <= x <= 0.5)
DOI:10.1016/j.ceramint.2013.04.084  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Ahmad, I.;Akhtar, M. J.;Siddique, M.;Iqbal, M.;Hasan, M. M.;
7:5:17:18     The colossal dielectric properties of FeNbO4
DOI:10.1016/j.jallcom.2014.07.104  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Li, Q. J.;Xia, S. Q.;Wang, X. Y.;Xia, W.;Yu, Y.;Cui, Y. M.;Zhang, J.;Zheng, J.;Cheng, C.;Li, Y. D.;Wang, H.;Huang, S. G.;Wang, C. C.;
7:5:17:19     Mossbauer studies and magnetic studies of Ni doped orthoferrites PrFe1-xNixO3 (x <= 0.3)
DOI:10.1016/j.jmmm.2010.03.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:7  AU: Makhdoomi, Abida Bashir;Ikram, M.;Kumar, Ravi;
7:5:17:20     Influence of technological factors on conductivity and dielectric dispersion in ZnO nanocrystalline thin films
DOI:10.1016/j.jallcom.2012.02.169  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Kapustianyk, V.;Eliyashevskyy, Yu;Turko, B.;Czapla, Z.;Dacko, S.;Barwinski, B.;
7:5:17:21     Spin state transition and giant dielectric constant in Pr0.987Na0.013CoO3
DOI:10.1063/1.3701613  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Wang, Heng;Li, Guangshe;Zhao, Minglei;Li, Liping;
7:5:17:22     Microstructure and Magnetic Properties of Metastable RFeO3 (R: Rare-earth element) Formed from Undercooled Melt
DOI:10.1111/jace.12127  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Kumar, Malahalli Vijaya;Kuribayashi, Kazuhiko;Yu, Jianding;Okada, Junpei T.;Ishikawa, Takehiko;
7:5:17:23     Synthesis, structural characterization and Mossbauer study of LnV(0.5)Fe(0.5)O(3) perovskites (Ln = Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er)
DOI:10.1016/j.materresbull.2012.05.055  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:0  AU: Ivashita, Flavio F.;Biondo, Valdecir;Bellini, Jusmar V.;Paesano, Andrea, Jr.;Cecilia Blanco, M.;Fuertes, Valeria C.;Pannunzio-Miner, Elisa V.;Carbonio, Raul E.;
7:5:17:24     Dielectric and electrical studies of Pr3+ doped nano CaSiO3 perovskite ceramics
DOI:10.1016/j.materresbull.2013.10.029  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:4  AU: Kulkarni, Sandhya;Nagabhushana, B. M.;Parvatikar, Narsimha;Koppalkar, Anilkumar;Shivakumara, C.;Damle, R.;
7:5:18:1     Dzyaloshinskii-Moriya driven helical-butterfly structure in Ba3NbFe3Si2O14
DOI:10.1103/PhysRevB.88.104417  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Scagnoli, V.;Huang, S. W.;Garganourakis, M.;de Souza, R. A.;Staub, U.;Simonet, V.;Lejay, P.;Ballou, R.;
7:5:18:2     Role of Antisymmetric Exchange in Selecting Magnetic Chirality in Ba3NbFe3Si2O14
DOI:10.1103/PhysRevLett.107.257203  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:11  AU: Zorko, A.;Pregelj, M.;Potocnik, A.;van Tol, J.;Ozarowski, A.;Simonet, V.;Lejay, P.;Petit, S.;Ballou, R.;
7:5:18:3     Magnetic and dielectric properties in the langasite-type compounds: A(3)BFe(3)D(2)O(14) (A = Ba, Sr, Ca; B = Ta, Nb, Sb; D = Ge, Si)
DOI:10.1103/PhysRevB.81.054416  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Marty, Karol;Bordet, Pierre;Simonet, Virginie;Loire, Mickael;Ballou, Rafik;Darie, Celine;Kljun, Jakob;Bonville, Pierre;Isnard, Olivier;Lejay, Pascal;Zawilski, Bartosz;Simon, Charles;
7:5:18:4     Magnetic control of ferroelectric polarization in a self-formed single magnetoelectric domain of multiferroic Ba3NbFe3Si2O14
DOI:10.1063/1.4866187  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Lee, Nara;Choi, Young Jai;Cheong, Sang-Wook;
7:5:18:5     Parity-Broken Chiral Spin Dynamics in Ba3NbFe3Si2O14
DOI:10.1103/PhysRevLett.106.207201  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:17  AU: Loire, M.;Simonet, V.;Petit, S.;Marty, K.;Bordet, P.;Lejay, P.;Ollivier, J.;Enderle, M.;Steffens, P.;Ressouche, E.;Zorko, A.;Ballou, R.;
7:5:18:6     Helical spin waves, magnetic order, and fluctuations in the langasite compound Ba3NbFe3Si2O14
DOI:10.1103/PhysRevB.83.104426  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Stock, C.;Chapon, L. C.;Schneidewind, A.;Su, Y.;Radaelli, P. G.;McMorrow, D. F.;Bombardi, A.;Lee, N.;Cheong, S. -W.;
7:5:18:7     THz Magnetoelectric Atomic Rotations in the Chiral Compound Ba3NbFe3Si2O14
DOI:10.1103/PhysRevLett.110.157208  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Chaix, L.;de Brion, S.;Levy-Bertrand, F.;Simonet, V.;Ballou, R.;Canals, B.;Lejay, P.;Brubach, J. B.;Creff, G.;Willaert, F.;Roy, P.;Cano, A.;
7:5:18:8     Pb3TeCo3V2O14: A Potential Multiferroic Co Bearing Member of the Dugganite Series
DOI:10.1021/cm202502p  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:6  AU: Silverstein, H. J.;Cruz-Kan, K.;Hallas, A. M.;Zhou, H. D.;Donaberger, R. L.;Hernden, B. C.;Bieringer, M.;Choi, E. S.;Hwang, J. M.;Wills, A. S.;Wiebe, C. R.;
7:5:18:9     Chiral spin-wave excitations of the spin-5/2 trimers in the langasite compound Ba3NbFe3Si2O14
DOI:10.1103/PhysRevB.84.104405  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Jensen, Jens;
7:5:18:10     Phenomenological model of multiferroic properties in langasite-type crystals with a triangular magnetic lattice
DOI:10.1103/PhysRevB.86.064414  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Pikin, S. A.;Lyubutin, I. S.;
7:5:18:11     Theoretical Investigation of the Magnetic Structure and Ferroelectric Polarization of the Multiferroic Langasite Ba3NbFe3Si2O14
DOI:10.1021/cm101441p  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:10  AU: Lee, Changhoon;Kan, Erjun;Xiang, Hongjun;Whangbo, Myung-Hwan;
7:5:18:12     Inter- and intratrimer excitations in the multiferroic Ba3NbFe3Si2O14
DOI:10.1103/PhysRevB.82.132408  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Zhou, H. D.;Barlas, Y.;Wiebe, C. R.;Qiu, Y.;Copley, J. R. D.;Gardner, J. S.;
7:5:18:13     The magnetic P-T phase diagram of langasite Ba3TaFe3Si2O14 at high hydrostatic pressures up to 38 GPa
DOI:10.1063/1.4822422  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Gavriliuk, A. G.;Lyubutin, I. S.;Starchikov, S. S.;Mironovich, A. A.;Ovchinnikov, S. G.;Trojan, I. A.;Xiao, Yuming;Chow, Paul;Sinogeikin, S. V.;Struzhkin, V. V.;
7:5:18:14     Structural and magnetic properties of the iron-containing langasite family A(3)MFe(3)X(2)O(14) (A = Ba, Sr; M = Sb, Nb, Ta; X = Si, Ge) observed by Mossbauer spectroscopy
DOI:10.1103/PhysRevB.84.214425  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Lyubutin, I. S.;Naumov, P. G.;Mill', B. V.;Frolov, K. V.;Demikhov, E. I.;
7:5:18:15     Low temperature dielectric dispersion and relaxor like behavior in multiferroic Ba3NbFe3Si2O14
DOI:10.1063/1.3699198  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Rathore, Satyapal Singh;Mishra, S. K.;Vitta, Satish;
7:5:18:16     CRYSTALLOGRAPHY Let's do the twist
DOI:10.1038/nmat3019  JN:NATURE MATERIALS  PY:2011
  TC:1  AU: Fiebig, Manfred;
7:5:18:17     Source of magnetic anisotropy in quasi-two-dimensional XY {Cu-4(tetrenH(5))W(CN)(8)](4).7.2H(2)O)}(n) bilayer molecular magnet
DOI:10.1103/PhysRevB.87.024406  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Zaharko, O.;Pregelj, M.;Zorko, A.;Podgajny, R.;Gukasov, A.;van Tol, J.;Klokishner, S. I.;Ostrovsky, S.;Delley, B.;
7:5:18:18     Pb3TeCo3V2O14: A Potential Multiferroic Co Bearing Member of the Dugganite Series (vol 24, pg 664, 2012)
DOI:10.1021/cm300618x  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:0  AU: Silverstein, H. J.;Cruz-Kan, K.;Hallas, A. M.;Zhou, H. D.;Donaberger, R. L.;Hernden, B. C.;Bieringer, M.;Choi, E. S.;Hwang, J. M.;Wills, A. S.;Wiebe, C. R.;
7:5:18:19     Insulator-Metal Transition in Highly Compressed NiO
DOI:10.1103/PhysRevLett.109.086402  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:4  AU: Gavriliuk, Alexander G.;Trojan, Ivan A.;Struzhkin, Viktor V.;
7:5:19:1     Induced Magnetoelectric Response in Pnma Perovskites
DOI:10.1103/PhysRevLett.107.197603  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:16  AU: Bousquet, Eric;Spaldin, Nicola;
7:5:19:2     Unexpectedly Large Electronic Contribution to Linear Magnetoelectricity
DOI:10.1103/PhysRevLett.106.107202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:13  AU: Bousquet, Eric;Spaldin, Nicola A.;Delaney, Kris T.;
7:5:19:3     Manipulation of magnetic field on dielectric constant and electric polarization in Cr2WO6
DOI:10.1063/1.4870518  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Fang, Y.;Wang, L. Y.;Song, Y. Q.;Tang, T.;Wang, D. H.;Du, Y. W.;
7:5:19:4     Temperature-Dependent Magnetoelectric Effect from First Principles
DOI:10.1103/PhysRevLett.105.087202  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:24  AU: Mostovoy, Maxim;Scaramucci, Andrea;Spaldin, Nicola A.;Delaney, Kris T.;
7:5:19:5     J dependence in the LSDA plus U treatment of noncollinear magnets
DOI:10.1103/PhysRevB.82.220402  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Bousquet, Eric;Spaldin, Nicola;
7:5:19:6     Full magnetoelectric response of Cr2O3 from first principles
DOI:10.1103/PhysRevB.86.094430  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Malashevich, Andrei;Coh, Sinisa;Souza, Ivo;Vanderbilt, David;
7:5:19:7     Linear Magnetoelectric Effect by Orbital Magnetism
DOI:10.1103/PhysRevLett.109.197203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: Scaramucci, A.;Bousquet, E.;Fechner, M.;Mostovoy, M.;Spaldin, N. A.;
7:5:19:8     Magnetoelectric hysteresis loops in Cr2O3 at room temperature
DOI:10.1103/PhysRevB.87.180408  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Iyama, Ayato;Kimura, Tsuyoshi;
7:5:19:9     Zone-center dynamical matrix in magnetoelectrics
DOI:10.1103/PhysRevB.84.214428  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Resta, R.;
7:5:19:10     First-principles microscopic model of exchange-driven magnetoelectric response with application to Cr2O3
DOI:10.1103/PhysRevB.89.174413  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Mu, Sai;Wysocki, A. L.;Belashchenko, K. D.;
7:5:19:11     Lyddane-Sachs-Teller Relationship in Linear Magnetoelectrics
DOI:10.1103/PhysRevLett.106.047202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:6  AU: Resta, Raffaele;
7:5:19:12     Monopole-based formalism for the diagonal magnetoelectric response
DOI:10.1103/PhysRevB.88.094429  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Spaldin, Nicola A.;Fechner, Michael;Bousquet, Eric;Balatsky, Alexander;Nordstrom, Lars;
7:5:19:13     Density-operator theory of orbital magnetic susceptibility in periodic insulators
DOI:10.1103/PhysRevB.84.064445  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Gonze, X.;Zwanziger, J. W.;
7:5:19:14     Magnetic field generated by a charge in a uniaxial magnetoelectric material
DOI:10.1103/PhysRevB.89.184415  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Fechner, M.;Spaldin, N. A.;Dzyaloshinskii, I. E.;
7:5:19:15     Dynamical magnetic charges and linear magnetoelectricity
DOI:10.1103/PhysRevB.89.064301  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Ye, Meng;Vanderbilt, David;
7:5:19:16     Instability in Magnetic Materials with a Dynamical Axion Field
DOI:10.1103/PhysRevLett.108.161803  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: Ooguri, Hirosi;Oshikawa, Masaki;
7:5:19:17     Orbital Magnetization as a Local Property
DOI:10.1103/PhysRevLett.110.087202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Bianco, Raffaello;Resta, Raffaele;
7:5:19:18     Magnetic anisotropy in Li-phosphates and origin of magnetoelectricity in LiNiPO4
DOI:10.1103/PhysRevB.81.024110  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Yamauchi, Kunihiko;Picozzi, Silvia;
7:5:19:19     Linear response of crystals to electromagnetic fields: Microscopic charge-current density, polarization, and magnetization
DOI:10.1103/PhysRevB.90.125115  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Swiecicki, Sylvia D.;Sipe, J. E.;
7:5:19:20     Pressure-induced magnetic phase transition in Cr2O3 determined by second harmonic generation measurements
DOI:10.1063/1.4804424  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Bayarjargal, Lkhamsuren;Winkler, Bjoern;
7:5:19:21     Full magnetoelectric response of Cr2O3 from first principles (vol 86, 094430, 2012)
DOI:10.1103/PhysRevB.87.139904  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Malashevich, Andrei;Coh, Sinisa;Souza, Ivo;Vanderbilt, David;
7:5:19:22     Dynamical magnetic charges and linear magnetoelectricity (vol 89, 064301, 2014)
DOI:10.1103/PhysRevB.89.059903  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ye, Meng;Vanderbilt, David;
7:5:20:1     Pressure-induced polar phases in multiferroic delafossite CuFeO2
DOI:10.1103/PhysRevB.89.220403  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Terada, Noriki;Khalyavin, Dmitry D.;Manuel, Pascal;Osakabe, Toyotaka;Radaelli, Paolo G.;Kitazawa, Hideaki;
7:5:20:2     Canted-spin-caused electric dipoles: A local symmetry theory
DOI:10.1103/PhysRevB.83.174432  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Kaplan, T. A.;Mahanti, S. D.;
7:5:20:3     Electric Field Control of the Magnetic Chiralities in Ferroaxial Multiferroic RbFe(MoO4)(2)
DOI:10.1103/PhysRevLett.108.237201  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:13  AU: Hearmon, Alexander J.;Fabrizi, Federica;Chapon, Laurent C.;Johnson, R. D.;Prabhakaran, Dharmalingam;Streltsov, Sergey V.;Brown, P. J.;Radaelli, Paolo G.;
7:5:20:4     Cu3Nb2O8: A Multiferroic with Chiral Coupling to the Crystal Structure
DOI:10.1103/PhysRevLett.107.137205  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:16  AU: Johnson, R. D.;Nair, Sunil;Chapon, L. C.;Bombardi, A.;Vecchini, C.;Prabhakaran, D.;Boothroyd, A. T.;Radaelli, P. G.;
7:5:20:5     Experimental Realization of a Unique Class of Compounds: XY-Antiferromagnetic Triangular Lattices, KAg2Fe[VO4](2) and RbAg2Fe[VO4](2), with Ferroelectric Ground States
DOI:10.1021/cm5025712  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:3  AU: Amuneke, Ngozi E.;Tapp, Joshua;de la Cruz, Clarina R.;Moeller, Angela;
7:5:20:6     Multiferroicity in the generic easy-plane triangular lattice antiferromagnet RbFe(MoO4)(2)
DOI:10.1103/PhysRevB.88.060409  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: White, J. S.;Niedermayer, Ch.;Gasparovic, G.;Broholm, C.;Park, J. M. S.;Shapiro, A. Ya.;Demianets, L. A.;Kenzelmann, M.;
7:5:20:7     Magnetic and ferroelectric orderings in multiferroic alpha-NaFeO2
DOI:10.1103/PhysRevB.89.184421  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Terada, Noriki;Khalyavin, Dmitry D.;Perez-Mato, Juan M.;Manuel, Pascal;Prabhakaran, Dharmalingam;Daoud-Aladine, Aziz;Radaelli, Paolo G.;Suzuki, Hiroyuki S.;Kitazawa, Hideaki;
7:5:20:8     Spiral-Spin-Driven Ferroelectricity in a Multiferroic Delafossite AgFeO2
DOI:10.1103/PhysRevLett.109.097203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:11  AU: Terada, Noriki;Khalyavin, Dmitry D.;Manuel, Pascal;Tsujimoto, Yoshihiro;Knight, Kevin;Radaelli, Paolo G.;Suzuki, Hiroyuki S.;Kitazawa, Hideaki;
7:5:20:9     First-principles study of multiferroic RbFe(MoO4)(2)
DOI:10.1103/PhysRevB.90.024402  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Cao, Kun;Johnson, R. D.;Giustino, Feliciano;Radaelli, Paolo G.;Guo, G-C.;He, Lixin;
7:5:20:10     Electromagnon excitations in canted-spin multiferroics
DOI:10.1063/1.4812346  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Chen, Hong-Bo;Li, You-Quan;
7:5:20:11     MnSb2O6: A Polar Magnet with a Chiral Crystal Structure
DOI:10.1103/PhysRevLett.111.017202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:1  AU: Johnson, R. D.;Cao, K.;Chapon, L. C.;Fabrizi, F.;Perks, N.;Manuel, P.;Yang, J. J.;Oh, Y. S.;Cheong, S. -W.;Radaelli, P. G.;
7:5:20:12     High-pressure suppression of long-range magnetic order in the triangular-lattice antiferromagnet CuFeO2
DOI:10.1103/PhysRevB.83.020403  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Terada, N.;Osakabe, T.;Kitazawa, H.;
7:5:20:13     Effect of high pressure on the crystal structure, magnetic, and vibrational properties of multiferroic RbFe(MoO4)(2)
DOI:10.1103/PhysRevB.87.014112  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kozlenko, D. P.;Kichanov, S. E.;Lukin, E. V.;Dang, N. T.;Dubrovinsky, L. S.;Bykova, E. A.;Kamenev, K. V.;Liermann, H. -P.;Morgenroth, W.;Shapiro, A. Ya.;Savenko, B. N.;
7:5:20:14     The phase transitions in CsFe(MoO4)(2) triangular lattice antiferromagnet, neutron diffraction and high pressure studies
DOI:10.1016/j.jallcom.2014.04.049  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Gagor, Anna;Zajdel, Pawel;Toebbens, Daniel;
7:5:20:15     Uniaxial-pressure control of geometrical spin frustration in an Ising antiferromagnet CoNb2O6 via anisotropic deformation of the isosceles lattice
DOI:10.1103/PhysRevB.90.060412  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kobayashi, S.;Hosaka, S.;Tamatsukuri, H.;Nakajima, T.;Mitsuda, S.;Prokes, K.;Kiefer, K.;
7:5:20:16     Ag3Fe(VO4)(2) and AgFeV2O7: Synthesis, Structure, and Electrochemical Characteristics of Two New Silver Iron(III) Vanadates
DOI:10.1021/cm9024342  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:7  AU: Becht, Gregory A.;Vaughey, John T.;Hwu, Shiou-Jyh;
7:5:20:17     Dielectric and Magnetic Properties of Magnetoelectric Delafossites
DOI:10.1080/00150193.2012.746888  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Ter-Oganessian, N. V.;
7:5:20:18     Spin-Chirality-Driven Ferroelectricity on a Perfect Triangular Lattice Antiferromagnet
DOI:10.1103/PhysRevLett.113.147202  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Mitamura, H.;Watanuki, R.;Kaneko, K.;Onozaki, N.;Amou, Y.;Kittaka, S.;Kobayashi, R.;Shimura, Y.;Yamamoto, I.;Suzuki, K.;Chi, S.;Sakakibara, T.;
7:5:21:1     Mapping the Magnetostructural Quantum Phases of Mn3O4
DOI:10.1103/PhysRevLett.104.136402  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:33  AU: Kim, M.;Chen, X. M.;Joe, Y. I.;Fradkin, E.;Abbamonte, P.;Cooper, S. L.;
7:5:21:2     Electrochemical Synthesis and Nonvolatile Resistance Switching of Mn3O4 Thin Films
DOI:10.1021/cm5014027  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:2  AU: Koza, Jakub A.;Schroen, Ian P.;Willmering, Matthew M.;Switzer, Jay A.;
7:5:21:3     The ac-magnetic susceptibility and dielectric response of complex spin ordering processes in Mn3O4
DOI:10.1063/1.4895054  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Thota, Subhash;Singh, Kiran;Nayak, Sanjib;Simon, Ch.;Kumar, Jitendra;Prellier, Wilfrid;
7:5:21:4     Pressure and field tuning the magnetostructural phases of Mn3O4: Raman scattering and x-ray diffraction studies
DOI:10.1103/PhysRevB.84.174424  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Kim, M.;Chen, X. M.;Wang, X.;Nelson, C. S.;Budakian, R.;Abbamonte, P.;Cooper, S. L.;
7:5:21:5     Magnetic transitions in Mn3O4 and an anomaly at 38 K in magnetization and specific heat
DOI:10.1103/PhysRevB.83.094423  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Guillou, F.;Thota, S.;Prellier, W.;Kumar, J.;Hardy, V.;
7:5:21:6     On the derivation of the magnetocaloric properties in ferrimagnetic spinel Mn3O4
DOI:10.1063/1.3549706  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Thota, Subhash;Guillou, Francois;Hardy, Vincent;Wahl, Alexandre;Prellier, Wilfrid;Kumar, Jitendra;
7:5:21:7     Magnetic properties of Mn3O4 film with a coexistence of two preferential orientations
DOI:10.1063/1.4889819  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ren, Lizhu;Zhou, Wenqi;Wang, Yunjia;Meng, Meng;Wu, Shuxiang;Li, Shuwei;
7:5:21:8     Interplay among spin, orbital, and lattice degrees of freedom in a frustrated spinel Mn3O4
DOI:10.1103/PhysRevB.87.195115  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Nii, Y.;Sagayama, H.;Umetsu, H.;Abe, N.;Taniguchi, K.;Arima, T.;
7:5:21:9     Magnetic properties of Mn3O4 film under compressive stress grown on MgAl2O4 (001) by molecular beam epitaxy
DOI:10.1063/1.4817283  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Ren, Lizhu;Wu, Shuxiang;Yang, Mei;Zhou, Wenqi;Li, Shuwei;
7:5:21:10     Structural, optical, and magnetic properties of single-crystalline Mn3O4 nanowires
DOI:10.1007/s11051-012-1138-4  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2012
  TC:5  AU: Sambasivam, S.;Li, G. J.;Jeong, J. H.;Choi, B. C.;Lim, K. T.;Kim, S. S.;Song, T. K.;
7:5:21:11     Formation and magnetic behaviour of manganese oxide nanoparticles
DOI:10.1016/j.mseb.2010.01.049  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:23  AU: Thota, Subhash;Prasad, Bhagwati;Kumar, Jitendra;
7:5:21:12     Spin state of Mn3O4 investigated by Mn-55 nuclear magnetic resonance
DOI:10.1103/PhysRevB.84.174423  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Jo, Euna;An, Kyongmo;Shim, Jeong Hyun;Kim, Changsoo;Lee, Soonchil;
7:5:21:13     Structural change and phase coexistence upon magnetic ordering in the magnetodielectric spinel Mn3O4
DOI:10.1103/PhysRevB.90.064418  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kemei, Moureen C.;Harada, Jaye K.;Seshadri, Ram;Suchomel, Matthew R.;
7:5:21:14     Epitaxial growth of manganese oxide films on MgAl2O4 (001) substrates and the possible mechanism
DOI:10.1016/j.jcrysgro.2013.11.085  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:2  AU: Ren, Lizhu;Wu, Shuxiang;Zhou, Wenqi;Li, Shuwei;
7:5:21:15     Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and Mn-55(3+) NMR
DOI:10.1103/PhysRevB.86.224420  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;
7:5:21:16     Giant atomic displacement at a magnetic phase transition in metastable Mn3O4
DOI:10.1103/PhysRevB.87.014417  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Hirai, S.;dos Santos, A. M.;Shapiro, M. C.;Molaison, J. J.;Pradhan, N.;Guthrie, M.;Tulk, C. A.;Fisher, I. R.;Mao, W. L.;
7:5:21:17     Magnetization reversal of two-dimensional superlattices of Mn(3)O(4) nanocubes and their collective dipolar interaction effects
DOI:10.1063/1.3466983  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Chen, Weimeng;Chen, Chinping;Guo, Lin;
7:5:22:1     Size-Dependent Passivation Shell and Magnetic Properties in Antiferromagnetic/Ferrimagnetic Core/Shell MnO Nanoparticles
DOI:10.1021/ja1021798  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:46  AU: Lopez-Ortega, Alberto;Tobia, Dina;Winkler, Elin;Golosovsky, Igor V.;Salazar-Alvarez, German;Estrade, Sonia;Estrader, Marta;Sort, Jordi;Gonzalez, Miguel Angel;Surinach, Santiago;Arbiol, Jordi;Peiro, Francesca;Zysler, Roberto D.;Dolors Baro, Maria;Nogues, Josep;
7:5:22:2     Highly soluble multifunctional MnO nanoparticles for simultaneous optical and MRI imaging and cancer treatment using photodynamic therapy
DOI:10.1039/c0jm01465f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:33  AU: Schladt, Thomas D.;Schneider, Kerstin;Shukoor, M. Ibrahim;Natalio, Filipe;Bauer, Heiko;Tahir, M. Nawaz;Weber, Stefan;Schreiber, Laura M.;Schroeder, Heinz C.;Mueller, Werner E. G.;Tremel, Wolfgang;
7:5:22:3     Size and anisotropy effects on magnetic properties of antiferromagnetic nanoparticles
DOI:10.1016/j.jmmm.2009.08.045  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:31  AU: Wesselinowa, J. M.;
7:5:22:4     Spectroscopic Signature of the Superparamagnetic Transition and Surface Spin Disorder in CoFe2O4 Nanoparticles
DOI:10.1021/nn301276q  JN:ACS NANO  PY:2012
  TC:9  AU: Sun, Qi-C.;Birkel, Christina S.;Cao, Jinbo;Tremel, Wolfgang;Musfeldt, Janice L.;
7:5:22:5     Antiferromagnetic order in MnO spherical nanoparticles
DOI:10.1103/PhysRevB.83.214418  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Wang, C. H.;Baker, S. N.;Lumsden, M. D.;Nagler, S. E.;Heller, W. T.;Baker, G. A.;Deen, P. D.;Cranswick, L. M. D.;Su, Y.;Christianson, A. D.;
7:5:22:6     Shell pressure on the core of MnO/Mn3O4 core/shell nanoparticles
DOI:10.1103/PhysRevB.87.224429  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Silva, N. J. O.;Karmaoui, M.;Amaral, V. S.;Puente-Orench, I.;Campo, J.;da Silva, I.;Ibarra, A.;Bustamante, R.;Millan, A.;Palacio, F.;
7:5:22:7     Experimental Determination of Ionicity in MnO Nanoparticles
DOI:10.1021/cm200582t  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:10  AU: Sun, Qi-C.;Xu, Xiaoshan;Baker, Sheila N.;Christianson, Andrew D.;Musfeldt, Janice L.;
7:5:22:8     Elastic and magnetic effects on the infrared phonon spectra of MnF2
DOI:10.1103/PhysRevB.82.054412  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Schleck, R.;Nahas, Y.;Lobo, R. P. S. M.;Varignon, J.;Lepetit, M. B.;Nelson, C. S.;Moreira, R. L.;
7:5:22:9     Magnetoelastic coupling in bulk and nanoscale MnO
DOI:10.1103/PhysRevB.84.014301  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Sun, Q. -C.;Baker, S. N.;Christianson, A. D.;Musfeldt, J. L.;
7:5:22:10     Magnetic phase transition in confined MnO nanoparticles studied by polarized neutron scattering
DOI:10.1103/PhysRevB.81.064423  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Feygenson, Mikhail;Schweika, Werner;Ioffe, Alexander;Vakhrushev, Sergey B.;Brueckel, Thomas;
7:5:22:11     Synthesis, characterization and functionalization of nearly mono-disperse copper ferrite CuxFe3-xO4 nanoparticles
DOI:10.1039/c0jm04577b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:7  AU: Nakhjavan, Bahar;Tahir, Muhammad Nawaz;Panthoefer, M.;Gao, Haitao;Schladt, Thomas D.;Gasi, Teuta;Ksenofontov, Vadim;Branscheid, Robert;Weber, Stefan;Kolb, Ute;Schreiber, Laura Maria;Tremel, Wolfgang;
7:5:22:12     Nanoparticles in Cancer Imaging and Therapy
DOI:10.1155/2012/891318  JN:JOURNAL OF NANOMATERIALS  PY:2012
  TC:6  AU: Smith, Leon;Kuncic, Zdenka;Ostrikov, Kostya (Ken);Kumar, Shailesh;
7:5:22:13     Facile synthesis of monodisperse MnO nanoparticles from bulk MnO
DOI:10.1016/j.jcrysgro.2011.10.022  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:2  AU: Lin, Chee-Cheng;Chen, Chih-Jung;Chiang, Ray-Kuang;
7:5:22:14     Structural morphology and magnetism of electroless-plated NiP films on a surface-modified Si substrate
DOI:10.1016/j.tsf.2011.09.025  JN:THIN SOLID FILMS  PY:2011
  TC:0  AU: Huang, Chun-Chao;Hsu, Hao-Chun;Tseng, Yuan-Chieh;
7:5:23:1     Tunable spin reorientation transition and magnetocaloric effect in Sm0.7-xLaxSr0.3MnO3 series
DOI:10.1063/1.4773337  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Aparnadevi, M.;Mahendiran, R.;
7:5:23:2     Exchange field on the rare earth Sm3+ in a single crystal perovskite SmMnO3
DOI:10.1103/PhysRevB.84.104415  JN:PHYSICAL REVIEW B  PY:2011
  TC:16  AU: Cheng, J-G;Zhou, J-S;Goodenough, J. B.;Su, Y. T.;Sui, Y.;Ren, Y.;
7:5:23:3     Magnetocapacitive effects in the Neel N-type ferrimagnet SmMnO3
DOI:10.1103/PhysRevB.82.212403  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Jung, Jong-Suck;Iyama, Ayato;Nakamura, Hiroyuki;Mizumaki, Masaichiro;Kawamura, Naomi;Wakabayashi, Yusuke;Kimura, Tsuyoshi;
7:5:23:4     Magnetic coupling between Sm3+ and the canted spin in an antiferromagnetic SmFeO3 single crystal
DOI:10.1103/PhysRevB.86.064417  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Marshall, L. G.;Cheng, J. -G.;Zhou, J. -S.;Goodenough, J. B.;Yan, J. -Q.;Mandrus, D. G.;
7:5:23:5     Multiferroic properties and magnetic structure of Sm1-xYxMnO3
DOI:10.1103/PhysRevB.83.174426  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: O'Flynn, D.;Tomy, C. V.;Lees, M. R.;Daoud-Aladine, A.;Balakrishnan, G.;
7:5:23:6     Lattice distortion accompanied by magnetization reversal in A-type antiferromagnetic manganites
DOI:10.1103/PhysRevB.85.174414  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Jung, Jong-Suck;Iyama, Ayato;Nakamura, Hiroyuki;Wakabayashi, Yusuke;Kimura, Tsuyoshi;
7:5:23:7     Alternating current magnetotransport in Sm0.1La0.6Sr0.3MnO3
DOI:10.1063/1.4789408  JN:AIP ADVANCES  PY:2013
  TC:0  AU: Aparnadevi, M.;Mahendiran, R.;
7:5:23:8     Strong 4f electron interaction and magnetic ordering modification in Nd1-xErxMnO3 (0 <= x <= 0.5)
DOI:10.1063/1.3659897  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Hong, Fang;Cheng, Zhenxiang;Wang, Xiaolin;
7:5:23:9     Electrical detection of spin reorientation transition in ferromagnetic La0.4Sm0.3Sr0.3MnO3
DOI:10.1063/1.4797471  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Aparnadevi, M.;Mahendiran, R.;
7:5:23:10     Competition between the crystal field and the exchange field in Er3+ doped NdMnO3
DOI:10.1063/1.4754613  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Hong, Fang;Cheng, Zhenxiang;Wang, Xiaolin;Dou, Shixue;
7:5:23:11     Critical behavior of the paramagnetic to antiferromagnetic transition in orthorhombic and hexagonal phases of RMnO3 (R = Sm, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y)
DOI:10.1103/PhysRevB.85.184425  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Oleaga, A.;Salazar, A.;Prabhakaran, D.;Cheng, J. -G.;Zhou, J. -S.;
7:5:23:12     Complex ferromagnetic-antiferromagnetic phase transition and glass-like arrest of kinetics in Sm1-xBaxCrO3 (x=0 and 0.1)
DOI:10.1063/1.4876488  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Qian, X. L.;Deng, D. M.;Jin, Y.;Lu, B.;Cao, S. X.;Zhang, J. C.;
7:5:23:13     Magnetic properties of mechanically activated SmMnO3 powders
DOI:10.1007/s10853-013-7585-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:2  AU: Uporov, S. A.;Mitrofanov, V. Ya.;Fedorova, O. M.;Fishman, A. Ya.;
7:5:23:14     Influence of length and measurement geometry on magnetoimpedance in La0.7Sr0.3MnO3
DOI:10.1063/1.3293292  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Rebello, A.;Mahendiran, R.;
7:5:23:15     Theory of the ac Spin-Valve Effect
DOI:10.1103/PhysRevLett.107.176604  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:4  AU: Kochan, Denis;Gmitra, Martin;Fabian, Jaroslav;
7:5:24:1     Spin-spiral inhomogeneity as the origin of ferroelectric activity in orthorhombic manganites
DOI:10.1103/PhysRevB.83.054404  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Solovyev, I. V.;
7:5:24:2     Orbital magnetization of insulating perovskite transition-metal oxides with a net ferromagnetic moment in the ground state
DOI:10.1103/PhysRevB.89.064428  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Nikolaev, S. A.;Solovyev, I. V.;
7:5:24:3     Magnetic-field control of the electric polarization in BiMnO3
DOI:10.1103/PhysRevB.82.094425  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Solovyev, I. V.;Pchelkina, Z. V.;
7:5:24:4     Double-exchange theory of ferroelectric polarization in orthorhombic manganites with twofold periodic magnetic texture
DOI:10.1103/PhysRevB.87.144424  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Solovyev, I. V.;Nikolaev, S. A.;
7:5:24:5     Self-consistent linear response for the spin-orbit interaction related properties
DOI:10.1103/PhysRevB.90.024417  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Solovyev, I. V.;
7:5:24:6     Ferroelectricity due to Orbital Ordering in E-Type Undoped Rare-Earth Manganites
DOI:10.1103/PhysRevLett.106.077201  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:14  AU: Barone, Paolo;Yamauchi, Kunihiko;Picozzi, Silvia;
7:5:24:7     Magnetic structure and ferroelectric activity in orthorhombic YMnO3: Relative roles of magnetic symmetry breaking and atomic displacements
DOI:10.1103/PhysRevB.86.144406  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Solovyev, I. V.;Valentyuk, M. V.;Mazurenko, V. V.;
7:5:24:8     Buckling-induced Zener polaron instability in half-doped manganites
DOI:10.1103/PhysRevB.83.233103  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Barone, Paolo;Picozzi, Silvia;van den Brink, Jeroen;
7:5:24:9     Ferroelectricity induced by cooperative orbital ordering and Peierls instability
DOI:10.1103/PhysRevB.85.214101  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Barone, Paolo;Picozzi, Silvia;
7:5:24:10     Origin of multiferroicity in MnWO4
DOI:10.1103/PhysRevB.87.144403  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Solovyev, I. V.;
7:5:24:11     Magnetic structure of the noncentrosymmetric perovskites PbVO3 and BiCoO3: Theoretical analysis
DOI:10.1103/PhysRevB.85.054420  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Solovyev, I. V.;
7:5:24:12     Multiferroicity and orbital ordering in Pr0.5Ca0.5MnO3 from first principles
DOI:10.1103/PhysRevB.82.140101  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Colizzi, Giuseppe;Filippetti, Alessio;Fiorentini, Vincenzo;
7:5:24:13     Spin-Orbit Origin of Anomalous Temperature Dependence of the Magnetic Susceptibility of PbVO3
DOI:10.1080/00150193.2014.889934  JN:FERROELECTRICS  PY:2014
  TC:1  AU: Radwanski, R. J.;Nalecz, D. M.;Ropka, Z.;Bujakiewicz-Koronska, R.;
7:5:25:1     FeCr2O4 and CoCr2O4 spinels: Multiferroicity in the collinear magnetic state?
DOI:10.1063/1.3656711  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:27  AU: Singh, Kiran;Maignan, Antoine;Simon, Charles;Martin, Christine;
7:5:25:2     Electronic and magnetic properties of (111)-oriented CoCr2O4 epitaxial thin film
DOI:10.1063/1.4891653  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Liu, Xiaoran;Kareev, M.;Cao, Yanwei;Liu, Jian;Middey, S.;Meyers, D.;Freeland, J. W.;Chakhalian, J.;
7:5:25:3     Unconventional Magnetostructural Transition in CoCr2O4 at High Magnetic Fields
DOI:10.1103/PhysRevLett.110.115502  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:8  AU: Tsurkan, V.;Zherlitsyn, S.;Yasin, S.;Felea, V.;Skourski, Y.;Deisenhofer, J.;von Nidda, H. -A. Krug;Wosnitza, J.;Loidl, A.;
7:5:25:4     Magnetoelasticity in ACr(2)O(4) spinel oxides (A = Mn, Fe, Co, Ni, and Cu)
DOI:10.1103/PhysRevB.87.064416  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Kocsis, V.;Bordacs, S.;Varjas, D.;Penc, K.;Abouelsayed, A.;Kuntscher, C. A.;Ohgushi, K.;Tokura, Y.;Kezsmarki, I.;
7:5:25:5     Magnetic and structural phase transitions in the spinel compound Fe1+xCr2-xO4
DOI:10.1103/PhysRevB.89.134106  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ma, J.;Garlea, V. O.;Rondinone, A.;Aczel, A. A.;Calder, S.;dela Cruz, C.;Sinclair, R.;Tian, W.;Chi, Songxue;Kiswandhi, A.;Brooks, J. S.;Zhou, H. D.;Matsuda, M.;
7:5:25:6     Spin-induced symmetry breaking in orbitally ordered NiCr2O4 and CuCr2O4
DOI:10.1103/PhysRevB.86.054406  JN:PHYSICAL REVIEW B  PY:2012
  TC:13  AU: Suchomel, Matthew R.;Shoemaker, Daniel P.;Ribaud, Lynn;Kemei, Moureen C.;Seshadri, Ram;
7:5:25:7     Structural ground states of (A, A ') Cr2O4(A= Mg, Zn; A ' = Co,Cu) spinel solid solutions: Spin-Jahn-Teller and Jahn-Teller effects
DOI:10.1103/PhysRevB.89.174410  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kemei, Moureen C.;Moffitt, Stephanie L.;Darago, Lucy E.;Seshadri, Ram;Suchomel, Matthew R.;Shoemaker, Daniel P.;Page, Katharine;Siewenie, Joan;
7:5:25:8     B-T phase diagram of CoCr2O4 in magnetic fields up to 14 T
DOI:10.1103/PhysRevB.85.012101  JN:PHYSICAL REVIEW B  PY:2012
  TC:14  AU: Pronin, A. V.;Uhlarz, M.;Beyer, R.;Fischer, T.;Wosnitza, J.;Gorshunov, B. P.;Komandin, G. A.;Prokhorov, A. S.;Dressel, M.;Bush, A. A.;Torgashev, V. I.;
7:5:25:9     Magnetocapacitance as a sensitive probe of magnetostructural changes in NiCr2O4
DOI:10.1103/PhysRevB.89.024405  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Sparks, Taylor D.;Kemei, Moureen C.;Barton, Phillip T.;Seshadri, Ram;Mun, Eun-Deok;Zapf, Vivien S.;
7:5:25:10     Exchange bias in non-collinear spin-spiral system Co(Cr1-xCox)(2)O-4(x=0.0-0.1)
DOI:10.1016/j.jmmm.2014.07.052  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Padam, R.;Ravi, S.;Ramakrishnan, S.;Grover, A. K.;Pal, D.;
7:5:25:11     Spin state and orbital ordering in CuCr2O4 investigated by NMR
DOI:10.1103/PhysRevB.88.094417  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Jo, Euna;Kang, Byeongki;Kim, Changsoo;Kwon, Sangil;Lee, Soonchil;
7:5:25:12     Magnetostructural transition, metamagnetism, and magnetic phase coexistence in Co10Ge3O16
DOI:10.1103/PhysRevB.88.024403  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Barton, Phillip T.;Seshadri, Ram;Llobet, Anna;Suchomel, Matthew R.;
7:5:25:13     Magnetic compensation effect and phase reversal of exchange bias field across compensation temperature in multiferroic Co(Cr0.95Fe0.05)(2)O-4
DOI:10.1063/1.4795724  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Padam, R.;Pandya, Swati;Ravi, S.;Nigam, A. K.;Ramakrishnan, S.;Grover, A. K.;Pal, D.;
7:5:25:14     Understanding complex magnetic order in disordered cobalt hydroxides through analysis of the local structure
DOI:10.1103/PhysRevB.83.094418  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Neilson, James R.;Morse, Daniel E.;Melot, Brent C.;Shoemaker, Daniel P.;Kurzman, Joshua A.;Seshadri, Ram;
7:5:25:15     Ferroelectricity in spinel solid solution Co0.8Ni0.2Cr2O4
DOI:10.1103/PhysRevB.85.214112  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Bush, A. A.;Shkuratov, V. Ya.;Kamentsev, K. E.;Prokhorov, A. S.;Zhukova, E. S.;Gorshunov, B. P.;Torgashev, V. I.;
7:5:25:16     Observation of an intersublattice exchange magnon in CoCr2O4 and analysis of magnetic ordering
DOI:10.1103/PhysRevB.87.134423  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kamenskyi, D.;Engelkamp, H.;Fischer, T.;Uhlarz, M.;Wosnitza, J.;Gorshunov, B. P.;Komandin, G. A.;Prokhorov, A. S.;Dressel, M.;Bush, A. A.;Torgashev, V. I.;Pronin, A. V.;
7:5:25:17     Understanding complex magnetic order in disordered cobalt hydroxides through analysis of the local structure (vol 83, 094418, 2011)
DOI:10.1103/PhysRevB.83.109904  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Neilson, James R.;Morse, Daniel E.;Melot, Brent C.;Shoemaker, Daniel P.;Kurzman, Joshua A.;Seshadri, Ram;
7:5:25:18     B - T phase diagram of CoCr2O4 in magnetic fields up to 14 T (vol 85, 012101, 2012)
DOI:10.1103/PhysRevB.85.069901  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Pronin, A. V.;Uhlarz, M.;Beyer, R.;Fischer, T.;Wosnitza, J.;Gorshunov, B. P.;Komandin, G. A.;Prokhorov, A. S.;Dressel, M.;Bush, A. A.;Torgashev, V. I.;
7:5:26:1     Structural investigations on Co3-xMnxTeO6; (0 < x <= 2); High temperature ferromagnetism and enhanced low temperature anti-ferromagnetism
DOI:10.1063/1.4893330  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Singh, Harishchandra;Sinha, A. K.;Ghosh, Haranath;Singh, M. N.;Rajput, Parasmani;Prajapat, C. L.;Singh, M. R.;Ravikumar, G.;
7:5:26:2     Observation of high-spin mixed oxidation state of cobalt in ceramic Co3TeO6
DOI:10.1063/1.4903053  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Singh, Harishchandra;Ghosh, Haranath;Rao, T. V. Chandrasekhar;Sinha, A. K.;Rajput, Parasmani;
7:5:26:3     Complex magnetism and magnetic-field-driven electrical polarization of Co3TeO6
DOI:10.1103/PhysRevB.84.180404  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Hudl, M.;Mathieu, R.;Ivanov, S. A.;Weil, M.;Carolus, V.;Lottermoser, Th.;Fiebig, M.;Tokunaga, Y.;Taguchi, Y.;Tokura, Y.;Nordblad, P.;
7:5:26:4     Temperature-dependent multi-k magnetic structure in multiferroic Co3TeO6
DOI:10.1016/j.materresbull.2011.10.003  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:10  AU: Ivanov, S. A.;Tellgren, R.;Ritter, C.;Nordblad, P.;Mathieu, R.;Andre, G.;Golubko, N. V.;Politova, E. D.;Weil, M.;
7:5:26:5     Interplay between the magnetic and electric degrees of freedom in multiferroic Co3TeO6
DOI:10.1103/PhysRevB.85.094431  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Li, Wen-Hsien;Wang, Chin-Wei;Hsu, Daniel;Lee, Chi-Hung;Wu, Chun-Ming;Chou, Chih-Chieh;Yang, Hung-Duen;Zhao, Yang;Chang, Sung;Lynn, Jeffrey W.;Berger, Helmuth;
7:5:26:6     New type of incommensurate magnetic ordering in Mn3TeO6
DOI:10.1016/j.materresbull.2011.07.041  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:12  AU: Ivanov, S. A.;Nordblad, P.;Mathieu, R.;Tellgren, R.;Ritter, C.;Golubko, N. V.;Politova, E. D.;Weil, M.;
7:5:26:7     First-order multi-k phase transitions and magnetoelectric effects in multiferroic Co3TeO6
DOI:10.1103/PhysRevB.85.214439  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Toledano, Pierre;Carolus, Vera;Hudl, Matthias;Lottermoser, Thomas;Khalyavin, Dmitry D.;Ivanov, Sergey A.;Fiebig, Manfred;
7:5:26:8     Chemical pressure effects on structural, dielectric and magnetic properties of solid solutions Mn3-xCoxTeO6
DOI:10.1016/j.materresbull.2013.10.016  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Ivanov, S. A.;Mathieu, R.;Nordblad, P.;Ritter, C.;Tellgren, R.;Golubko, N.;Mosunov, A.;Politova, E. D.;Weil, M.;
7:5:26:9     Magnetic phase diagram of the antiferromagnetic cobalt tellurate Co3TeO6
DOI:10.1103/PhysRevB.84.235123  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Her, J. L.;Chou, C. C.;Matsuda, Y. H.;Kindo, K.;Berger, H.;Tseng, K. F.;Wang, C. W.;Li, W. H.;Yang, H. D.;
7:5:26:10     Symmetry analysis of multiferroic Co3TeO6
DOI:10.1103/PhysRevB.85.100403  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Harris, A. B.;
7:5:26:11     Spin and Dipole Ordering in Ni2InSbO6 and Ni2ScSbO6 with Corundum-Related Structure
DOI:10.1021/cm304095s  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:5  AU: Ivanov, S. A.;Mathieu, R.;Nordblad, P.;Tellgren, R.;Ritter, C.;Politova, E.;Kaleva, G.;Mosunov, A.;Stefanovich, S.;Weil, M.;
7:5:26:12     Influence of the A cation on the low-temperature antiferromagnetism of ordered antiferroelectric A(2)CoTeO(6) perovskites
DOI:10.1103/PhysRevB.83.174420  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Mathieu, R.;Ivanov, S. A.;Tellgren, R.;Nordblad, P.;
7:5:26:13     Structural and magnetic properties of Mn3-xCdxTeO6 (x=0, 1, 1.5 and 2)
DOI:10.1016/j.jmmm.2011.12.027  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Ivanov, S. A.;Mathieu, R.;Nordblad, P.;Politova, E.;Tellgren, R.;Ritter, C.;Proidakova, V.;
7:5:26:14     Complex magnetic couplings in Co3TeO6
DOI:10.1103/PhysRevB.88.184427  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:5:26:15     First order transition in Dy5Si3Ge: Transport and thermal properties, and first principles calculations
DOI:10.1063/1.3554255  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Nirmala, R.;Paudyal, Durga;Pecharsky, V. K.;Gschneidner, K. A., Jr.;Nigam, A. K.;
7:5:27:1     Magnetic structure of CaBaCo4O7: Lifting of geometrical frustration towards ferrimagnetism
DOI:10.1103/PhysRevB.81.094417  JN:PHYSICAL REVIEW B  PY:2010
  TC:34  AU: Caignaert, V.;Pralong, V.;Hardy, V.;Ritter, C.;Raveau, B.;
7:5:27:2     Gigantic magnetic-field-induced polarization and magnetoelectric coupling in a ferrimagnetic oxide CaBaCo4O7
DOI:10.1103/PhysRevB.88.174403  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Caignaert, V.;Maignan, A.;Singh, K.;Simon, Ch.;Pralong, V.;Raveau, B.;Mitchell, J. F.;Zheng, H.;Huq, A.;Chapon, L. C.;
7:5:27:3     Giant Tunability of Ferroelectric Polarization in GdMn2O5
DOI:10.1103/PhysRevLett.110.137203  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:11  AU: Lee, N.;Vecchini, C.;Choi, Y. J.;Chapon, L. C.;Bombardi, A.;Radaelli, P. G.;Cheong, S-W.;
7:5:27:4     Spin-assisted ferroelectricity in ferrimagnetic CaBaCo(4)O7
DOI:10.1103/PhysRevB.86.024410  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Singh, K.;Caignaert, V.;Chapon, L. C.;Pralong, V.;Raveau, B.;Maignan, A.;
7:5:27:5     Closely related magnetic and dielectric transitions in the "114" magnetoelectric Zn-doped CaBaCo4O7
DOI:10.1063/1.4905033  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Seikh, Md Motin;Caignaert, V.;Suard, E.;Meher, K. R. S. Preethi;Maignan, A.;Raveau, B.;
7:5:27:6     CaBaCo4O7: A ferrimagnetic pyroelectric
DOI:10.1103/PhysRevB.90.045129  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Johnson, R. D.;Cao, K.;Giustino, F.;Radaelli, P. G.;
7:5:27:7     Competition between Ferrimagnetism and Magnetic Frustration in Zinc Substituted YBaFe4O7
DOI:10.1021/cm1002065  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:11  AU: Sarkar, Tapati;Pralong, V.;Caignaert, V.;Raveau, B.;
7:5:27:8     The effect of Al doping on the structure and magnetism in cobaltite CaBaCo4O7
DOI:10.1016/j.jallcom.2013.04.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Zou, Youming;Qu, Zhe;Zhang, Lei;Ning, Wei;Ling, Langsheng;Pi, Li;Zhang, Yuheng;
7:5:27:9     Magnetism of the "114" orthorhombic charge ordered CaBaCo4O7 doped with Zn or Ga: a spectacular valency effect
DOI:10.1039/c2jm33486k  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:7  AU: Sarkar, Tapati;Seikh, Md. Motin;Pralong, V.;Caignaert, V.;Raveau, B.;
7:5:27:10     Oxygen hyperstoichiometric hexagonal ferrite CaBaFe4O7+delta (delta approximate to 0.14): Coexistence of ferrimagnetism and spin glass behavior
DOI:10.1103/PhysRevB.83.094409  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Sarkar, Tapati;Duffort, V.;Pralong, V.;Caignaert, V.;Raveau, B.;
7:5:27:11     Hysteretic "Magnetic-Transport-Structural" Transition in "114" Cobaltites: Size Mismatch Effect
DOI:10.1021/cm103088e  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:12  AU: Sarkar, Tapati;Caignaert, V.;Pralong, V.;Raveau, B.;
7:5:27:12     Complex magnetic phase separation induced by Li-doping in multiferroic CaBaCo4O7
DOI:10.1063/1.4790373  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Seikh, Md. Motin;Sarkar, Tapati;Pralong, V.;Caignaert, V.;Raveau, B.;
7:5:27:13     Structural and magnetic phase transitions of kagome-like compounds REBaCo4O7 (RE = Dy, Ho, Er, Tm, Yb, Lu)
DOI:10.1016/j.jmmm.2009.03.002  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:15  AU: Markina, M.;Vasiliev, A. N.;Nakayama, N.;Mizota, T.;Yeda, Y.;
7:5:27:14     Dramatic effect of A-site substitution upon the structure and magnetism of the "114" CaBaCo4O7 cobaltite
DOI:10.1103/PhysRevB.86.184403  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Seikh, Md. Motin;Sarkar, Tapati;Pralong, V.;Caignaert, V.;Raveau, B.;
7:5:27:15     Spectacular switching from ferrimagnetism to antiferromagnetism by zinc doping in "114" orthorhombic CaBaCo4O7
DOI:10.1063/1.4725517  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Sarkar, Tapati;Seikh, Md. Motin;Pralong, V.;Caignaert, V.;Raveau, B.;
7:5:27:16     Electronic and magnetic structure of the mixed-valence cobaltite CaBaCo4O7
DOI:10.1103/PhysRevB.84.085116  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Chatterjee, S.;Saha-Dasgupta, T.;
7:5:27:17     Magnetically induced femtoscale strain modulations in HoMn2O5
DOI:10.1103/PhysRevB.89.125114  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Vecchini, C.;Bombardi, A.;Chapon, L. C.;Beutier, G.;Radaelli, P. G.;Park, S.;Cheong, S. -W.;
7:5:27:18     Gallium substituted "114" YBaFe4O7: from a ferrimagnetic cluster glass to a cationic disordered spin glass
DOI:10.1039/c2jm15647d  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:2  AU: Sarkar, Tapati;Caignaert, V.;Pralong, V.;Raveau, B.;
7:5:27:19     Substitution effect of manganese for iron in "114'' YBaFe4O7 ferrite: structure, magnetism and oxygen hyperstoichiometry
DOI:10.1039/c2jm33456a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:1  AU: Duffort, V.;Sarkar, T.;Serrao, C. R.;Pralong, V.;Caignaert, V.;Maignan, A.;Raveau, B.;
7:5:28:1     epsilon-Fe2O3: An Advanced Nanomaterial Exhibiting Giant Coercive Field, Millimeter-Wave Ferromagnetic Resonance, and Magnetoelectric Coupling
DOI:10.1021/cm101967h  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:51  AU: Tucek, Jiri;Zboril, Radek;Namai, Asuka;Ohkoshi, Shin-ichi;
7:5:28:2     Electromagnon in ferrimagnetic epsilon-Fe2O3 nanograin ceramics
DOI:10.1103/PhysRevB.88.104301  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kadlec, Christelle;Kadlec, Filip;Goian, Veronica;Gich, Marti;Kempa, Martin;Rols, Stephane;Savinov, Maxim;Prokleska, Jan;Orlita, Milan;Kamba, Stanislav;
7:5:28:3     Multiferroic Iron Oxide Thin Films at Room Temperature
DOI:10.1002/adma.201400990  JN:ADVANCED MATERIALS  PY:2014
  TC:8  AU: Gich, Marti;Fina, Ignasi;Morelli, Alessio;Sanchez, Florencio;Alexe, Marin;Gazquez, Jaume;Fontcuberta, Josep;Roig, Anna;
7:5:28:4     Magnetic BaFe12O19 nanofiber filter for effective separation of Fe3O4 nanoparticles and removal of arsenic
DOI:10.1007/s11051-014-2787-2  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2014
  TC:0  AU: Byun, Jeehye;Patel, Hasmukh A.;Yavuz, Cafer T.;
7:5:28:5     High-frequency millimeter wave absorption of indium-substituted epsilon-Fe2O3 spherical nanoparticles (invited)
DOI:10.1063/1.4870168  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yoshikiyo, Marie;Namai, Asuka;Nakajima, Makoto;Yamaguchi, Keita;Suemoto, Tohru;Ohkoshi, Shin-ichi;
7:5:28:6     Epitaxial stabilization of epsilon-Fe2O3 (00l) thin films on SrTiO3 (111)
DOI:10.1063/1.3360217  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Gich, M.;Gazquez, J.;Roig, A.;Crespi, A.;Fontcuberta, J.;Idrobo, J. C.;Pennycook, S. J.;Varela, M.;Skumryev, V.;Varela, M.;
7:5:28:7     Arsenic removal by magnetic nanocrystalline barium hexaferrite
DOI:10.1007/s11051-012-0881-x  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2012
  TC:11  AU: Patel, Hasmukh A.;Byun, Jeehye;Yavuz, Cafer T.;
7:5:28:8     Room-temperature ground magnetic state of epsilon-Fe2O3: In-field Mossbauer spectroscopy evidence for collinear ferrimagnet
DOI:10.1063/1.3671114  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Tucek, Jiri;Ohkoshi, Shin-ichi;Zboril, Radek;
7:5:28:9     The synthesis of rhodium substituted epsilon-iron oxide exhibiting super high frequency natural resonance
DOI:10.1039/c3tc30805g  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:2  AU: Namai, Asuka;Yoshikiyo, Marie;Umeda, Sayaka;Yoshida, Takayuki;Miyazaki, Tatsuro;Nakajima, Makoto;Yamaguchi, Keita;Suemoto, Tohru;Ohkoshi, Shin-ichi;
7:5:28:10     Ultrafine alpha-Fe2O3 nanoparticles grown in confinement of in situ self-formed "cage" and their superior adsorption performance on arsenic(III)
DOI:10.1007/s11051-010-0157-2  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:11  AU: Tang, Wenshu;Li, Qi;Li, Caifu;Gao, Shian;Shang, Jian Ku;
7:5:28:11     High ferromagnetic resonance and thermal stability spinel Ni0.7Mn0.3-xCoxFe2O4 ferrite for ultra high frequency devices
DOI:10.1063/1.3678300  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Lee, Jaejin;Hong, Yang-Ki;Lee, Woncheol;Abo, Gavin S.;Park, Jihoon;Syslo, Ryan;Seong, Won-Mo;Park, Sang-Hoon;Ahn, Won-Ki;
7:5:28:12     The phase transition of epsilon-InxFe2-xO3 nanomagnets with a large thermal hysteresis loop (invited)
DOI:10.1063/1.3672075  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Yamada, Kana;Tokoro, Hiroko;Yoshikiyo, Marie;Yorinaga, Takenori;Namai, Asuka;Ohkoshi, Shin-ichi;
7:5:28:13     Design of experiment for hysteresis loops measurement
DOI:10.1016/j.jmmm.2014.05.012  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Tuckova, Michaela;Harman, Radoslav;Tucek, Pavel;Tucek, Jiri;
7:5:28:14     Temperature dependence of spin resonance in cobalt substituted NiZnCu ferrites
DOI:10.1063/1.3507266  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Lucas, A.;Lebourgeois, R.;Mazaleyrat, F.;Laboure, E.;
7:5:28:15     Phase-controlled preparation of iron (oxyhydr)oxide nanocrystallines for heavy metal removal
DOI:10.1007/s11051-010-0173-2  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:6  AU: Zhao, Xiongye;Guo, Xuejun;Yang, Zhifeng;Liu, Hong;Qian, Qingqing;
7:5:29:1     Room Temperature Nanoscale Ferroelectricity in Magnetoelectric GaFeO3 Epitaxial Thin Films
DOI:10.1103/PhysRevLett.111.087601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:10  AU: Mukherjee, Somdutta;Roy, Amritendu;Auluck, Sushil;Prasad, Rajendra;Gupta, Rajeev;Garg, Ashish;
7:5:29:2     Spin-phonon coupling, high-pressure phase transitions, and thermal expansion of multiferroic GaFeO3: A combined first principles and inelastic neutron scattering study
DOI:10.1103/PhysRevB.90.134304  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Gupta, Mayanak Kumar;Mittal, Ranjan;Zbiri, Mohamed;Singh, Ripandeep;Rols, Stephane;Schober, Helmut;Chaplot, Samrath Lal;
7:5:29:3     Phase stability of multiferroic GaFeO3 up to 1368 K from in situ neutron diffraction
DOI:10.1063/1.4803679  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Mishra, S. K.;Mittal, R.;Singh, Ripandeep;Zbiri, M.;Hansen, T.;Schober, H.;
7:5:29:4     High-temperature phonon spectra of multiferroic BiFeO3 from inelastic neutron spectroscopy
DOI:10.1063/1.3700745  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Zbiri, Mohamed;Schober, Helmut;Choudhury, Narayani;Mittal, Ranjan;Chaplot, Samrath L.;Patwe, Sadequa J.;Achary, Srungarpu N.;Tyagi, Avesh K.;
7:5:29:5     Magnetoelectric effects studied by resonant x-ray diffraction in ferrimagnetic GaFeO3
DOI:10.1103/PhysRevB.82.104411  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Staub, U.;Bodenthin, Y.;Piamonteze, C.;Collins, S. P.;Koohpayeh, S.;Fort, D.;Lovesey, S. W.;
7:5:29:6     Evidence of large nonlinear magnetic effects in the paramagnetic phase of GaFeO3
DOI:10.1103/PhysRevB.84.224427  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Gruener, Gisele;Vitucci, Francesco;Calvani, Paolo;Soret, Jean-Claude;
7:5:29:7     Multiferroic and magnetodielectric properties of the Al1-xGaxFeO3 family of oxides
DOI:10.1039/c0jm02688c  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:20  AU: Shireen, Ajmala;Saha, Rana;Mandal, P.;Sundaresan, A.;Rao, C. N. R.;
7:5:29:8     Study of Ga(2-x)FexO3 solid solution: Optimisation of the ceramic processing
DOI:10.1016/j.jeurceramsoc.2012.11.014  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Roulland, Francois;Lefevre, Christophe;Thomasson, Alexandre;Viart, Nathalie;
7:5:29:9     Room temperature multiferroicity in Ga0.6Fe1.4O3:Mg thin films
DOI:10.1063/1.4808349  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Thomasson, A.;Cherifi, S.;Lefevre, C.;Roulland, F.;Gautier, B.;Albertini, D.;Meny, C.;Viart, N.;
7:5:29:10     Magnetic frustration effect in polycrystalline Ga2-xFexO3
DOI:10.1016/j.jmmm.2010.07.018  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:11  AU: Wang, N.;Wen, F. S.;Li, L.;Lue, Y. F.;Liu, S. C.;Lu, Y. F.;Liu, Z. Y.;Xu, B.;He, J. L.;Yu, D. L.;Tian, Y. J.;
7:5:29:11     Ferromagnetic-type order of atomic multipoles in the polar ferrimagnetic GaFeO3
DOI:10.1103/PhysRevB.85.144421  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Staub, U.;Piamonteze, C.;Garganourakis, M.;Collins, S. P.;Koohpayeh, S. M.;Fort, D.;Lovesey, S. W.;
7:5:29:12     Chiral properties of hematite alpha-Fe2O3 inferred from resonant Bragg diffraction using circularly polarized x rays
DOI:10.1103/PhysRevB.88.094437  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Rodriguez-Fernandez, A.;Blanco, J. A.;Lovesey, S. W.;Scagnoli, V.;Staub, U.;Walker, H. C.;Shukla, D. K.;Strempfer, J.;
7:5:29:13     Spin glass-like phase below similar to 210 K in magnetoelectric gallium ferrite
DOI:10.1063/1.3693400  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Mukherjee, Somdutta;Garg, Ashish;Gupta, Rajeev;
7:5:29:14     Epitaxial growth of metastable multiferroic AlFeO3 film on SrTiO3 (111) substrate
DOI:10.1063/1.4866798  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Hamasaki, Yosuke;Shimizu, Takao;Taniguchi, Hiroki;Taniyama, Tomoyasu;Yasui, Shintaro;Itoh, Mitsuru;
7:5:29:15     Magnetic anisotropy and sub-lattice magnetization study of polycrystalline magneto-electric Ga2-xFexO3
DOI:10.1016/j.jmmm.2014.03.008  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:3  AU: Reddy, V. Raghavendra;Sharma, Kavita;Gupta, Ajay;Banerjee, A.;
7:5:29:16     Inelastic neutron scattering studies of YFeO3
DOI:10.1103/PhysRevB.89.014420  JN:PHYSICAL REVIEW B  PY:2014
  TC:3  AU: Hahn, S. E.;Podlesnyak, A. A.;Ehlers, G.;Granroth, G. E.;Fishman, R. S.;Kolesnikov, A. I.;Pomjakushina, E.;Conder, K.;
7:5:29:17     Reduced leakage currents and possible charge carriers tuning in Mg-doped Ga0.6Fe1.4O3 thin films
DOI:10.1063/1.4729872  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Lefevre, C.;Shin, R. H.;Lee, J. H.;Oh, S. H.;Roulland, F.;Thomasson, A.;Autissier, E.;Meny, C.;Jo, W.;Viart, N.;
7:5:29:18     Second harmonic generation in a polar ferrimagnet GaFeO3
DOI:10.1103/PhysRevB.82.024424  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Igarashi, Jun-ichi;Nagao, Tatsuya;
7:5:30:1     Origin of Electric-Field-Induced Magnetization in Multiferroic HoMnO3
DOI:10.1103/PhysRevLett.104.147204  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:24  AU: Ueland, B. G.;Lynn, J. W.;Laver, M.;Choi, Y. J.;Cheong, S. -W.;
7:5:30:2     Magneto- to Electroactive Transmutation of Spin Waves in ErMnO3
DOI:10.1103/PhysRevLett.112.137201  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Chaix, L.;de Brion, S.;Petit, S.;Ballou, R.;Regnault, L. -P.;Ollivier, J.;Brubach, J. -B.;Roy, P.;Debray, J.;Lejay, P.;Cano, A.;Ressouche, E.;Simonet, V.;
7:5:30:3     Infrared-active optical phonons and magnetic excitations in the hexagonal manganites RMnO3 (R = Ho, Er, Tm, Yb, and Lu)
DOI:10.1103/PhysRevB.90.024307  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Basistyy, R.;Stanislavchuk, T. N.;Sirenko, A. A.;Litvinchuk, A. P.;Kotelyanskii, M.;Carr, G. L.;Lee, N.;Wang, X.;Cheong, S. -W.;
7:5:30:4     Terahertz and infrared spectroscopic evidence of phonon-paramagnon coupling in hexagonal piezomagnetic YMnO3
DOI:10.1103/PhysRevB.84.174120  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Kadlec, C.;Goian, V.;Rushchanskii, K. Z.;Kuzel, P.;Lezaic, M.;Kohn, K.;Pisarev, R. V.;Kamba, S.;
7:5:30:5     Far-infrared spectra of the magnetic exchange resonances and optical phonons and their connection to magnetic and dielectric properties of Dy3Fe5O12 garnet
DOI:10.1103/PhysRevB.86.144112  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Kang, T. D.;Standard, E. C.;Rogers, P. D.;Ahn, K. H.;Sirenko, A. A.;Dubroka, A.;Bernhard, C.;Park, S.;Choi, Y. J.;Cheong, S. -W.;
7:5:30:6     Adjusted oscillator strength matching for hybrid magnetic and electric excitations in Dy3Fe5O12 garnet
DOI:10.1103/PhysRevB.83.174407  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Rogers, P. D.;Choi, Y. J.;Standard, E. C.;Kang, T. D.;Ahn, K. H.;Dubroka, A.;Marsik, P.;Wang, Ch.;Bernhard, C.;Park, S.;Cheong, S. -W.;Kotelyanskii, M.;Sirenko, A. A.;
7:5:30:7     Magnons and crystal-field transitions in hexagonal RMnO3 (R = Er, Tm, Yb, Lu) single crystals
DOI:10.1103/PhysRevB.85.144422  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Standard, E. C.;Stanislavchuk, T.;Sirenko, A. A.;Lee, N.;Cheong, S. -W.;
7:5:30:8     Coupling between magnon and ligand-field excitations in magnetoelectric Tb3Fe5O12 garnet
DOI:10.1103/PhysRevB.82.014414  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Kang, T. D.;Standard, E.;Ahn, K. H.;Sirenko, A. A.;Carr, G. L.;Park, S.;Choi, Y. J.;Ramazanoglu, M.;Kiryukhin, V.;Cheong, S. -W.;
7:5:30:9     Mueller matrices for anisotropic metamaterials generated using 4 x 4 matrix formalism
DOI:10.1016/j.tsf.2010.12.066  JN:THIN SOLID FILMS  PY:2011
  TC:8  AU: Rogers, P. D.;Kang, T. D.;Zhou, T.;Kotelyanskii, M.;Sirenko, A. A.;
7:5:30:10     Lattice and spin excitations in multiferroic h-YbMnO3
DOI:10.1103/PhysRevB.86.184410  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Liu, J.;Toulouse, C.;Rovillain, P.;Cazayous, M.;Gallais, Y.;Measson, M-A.;Lee, N.;Cheong, S. W.;Sacuto, A.;
7:5:30:11     Lattice and spin excitations in multiferroic h-YMnO3
DOI:10.1103/PhysRevB.89.094415  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Toulouse, C.;Liu, J.;Gallais, Y.;Measson, M. -A.;Sacuto, A.;Cazayous, M.;Chaix, L.;Simonet, V.;de Brion, S.;Pinsard-Godart, L.;Willaert, F.;Brubach, J. B.;Roy, P.;Petit, S.;
7:5:30:12     Ab Initio Phonon Structure of h-YMnO3 in Low-Symmetry Ferroelectric Phase
DOI:10.1080/00150193.2012.671116  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Rushchanskii, Konstantin Z.;Lezaic, Marjana;
7:5:30:13     Rotatable broadband retarders for far-infrared spectroscopic ellipsometry
DOI:10.1016/j.tsf.2010.12.057  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Kang, T. D.;Standard, E.;Carr, G. L.;Zhou, T.;Kotelyanskii, M.;Sirenko, A. A.;
7:5:31:1     Spin reorientation behavior in YMn1-xMxO3 (M=Ti, Fe, Ga; x=0, 0.1)
DOI:10.1016/j.jmmm.2013.08.021  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Sharma, Neetika;Das, A.;Prajapat, C. L.;Meena, S. S.;
7:5:31:2     Dominance of magnetoelastic coupling in multiferroic hexagonal YMnO3
DOI:10.1103/PhysRevB.81.184406  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Singh, A. K.;Patnaik, S.;Kaushik, S. D.;Siruguri, V.;
7:5:31:3     Magnetic structure of hexagonal YMnO3 and LuMnO3 from a microscopic point of view
DOI:10.1103/PhysRevB.86.054407  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Solovyev, I. V.;Valentyuk, M. V.;Mazurenko, V. V.;
7:5:31:4     Doping dependence of spin-lattice coupling and two-dimensional ordering in multiferroic hexagonal Y1-xLuxMnO3 (0 <= x <= 1)
DOI:10.1103/PhysRevB.82.054428  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Park, Junghwan;Lee, Seongsu;Kang, Misun;Jang, Kwang-Hyun;Lee, Changhee;Streltsov, S. V.;Mazurenko, V. V.;Valentyuk, M. V.;Medvedeva, J. E.;Kamiyama, T.;Park, J. -G.;
7:5:31:5     Effect of Fe substitution on multiferroic hexagonal YMnO3
DOI:10.1016/j.jmmm.2010.09.055  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:18  AU: Zaghrioui, M.;Greneche, J. M.;Autret-Lambert, C.;Gervais, M.;
7:5:31:6     Investigation of charge states and multiferroicity in Fe-doped h-YMnO3
DOI:10.1063/1.4794831  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Namdeo, Sonu;Sinha, A. K.;Singh, M. N.;Awasthi, A. M.;
7:5:31:7     Spin-glass behavior of Cr-doped YMnO3 compounds
DOI:10.1063/1.4731631  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Yoo, Y. J.;Lee, Y. P.;Park, J. S.;Kang, J. -H.;Kim, J.;Lee, B. W.;Seo, M. S.;
7:5:31:8     Disorder-driven spin-reorientation in multiferroic h-YMn1-xFexO3
DOI:10.1063/1.4887809  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Namdeo, Sonu;Rao, S. S.;Kaushik, S. D.;Siruguri, V.;Awasthi, A. M.;
7:5:31:9     Magnetic and dielectric behavior in YMn1-xFexO3 (x <= 0.5)
DOI:10.1063/1.4882069  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Sharma, Neetika;Das, A.;Mishra, S. K.;Prajapat, C. L.;Singh, M. R.;Meena, S. S.;
7:5:31:10     Atomistic simulation of Y-site substitution in multiferroic h-YMnO3
DOI:10.1103/PhysRevB.83.054104  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Zhang, Chengguo;Zhang, X.;Sun, Yonghao;Liu, Shuyi;
7:5:31:11     Local structural studies of hole doped hexagonal multiferroic Y(Mn,Zn)O-3
DOI:10.1063/1.3615682  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Cho, Deok-Yong;Park, Junghwan;Kim, Jiyeon;Park, Je-Geun;
7:5:31:12     Magnetic properties and local microstructures in Zn-doped YMnO3
DOI:10.1063/1.4870455  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhang, A. M.;Zhou, G. T.;Zheng, L.;Wu, X. S.;
7:5:31:13     Influence of doping on the spin dynamics and magnetoelectric effect in hexagonal Y0.7Lu0.3MnO3
DOI:10.1103/PhysRevB.89.144417  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Tian, W.;Tan, Guotai;Liu, Liu;Zhang, Jinxing;Winn, Barry;Hong, Tao;Fernandez-Baca, J. A.;Zhang, Chenglin;Dai, Pengcheng;
7:5:31:14     First-principles modeling of magnetic excitations in Mn-12
DOI:10.1103/PhysRevB.89.214422  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Mazurenko, V. V.;Kvashnin, Y. O.;Jin, Fengping;De Raedt, H. A.;Lichtenstein, A. I.;Katsnelson, M. I.;
7:5:31:15     Correlation between magnetic ordering and electric polarization in YMn1-xFexO3 nanocrystalline materials
DOI:10.1063/1.3673412  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Han, Tai-Chun;Wu, Pei-Jung;Shih, Yi-Lun;
7:5:31:16     Effects of Cr doping on the magnetic properties of multiferroic YMnO3
DOI:10.1063/1.4865214  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Han, Tai-Chun;Wu, I-Chu;Hsu, Hsin-Kai;
7:5:31:17     Effect of Al doping on the microstructure properties of YMn1-xAlxO3
DOI:10.1016/j.jcrysgro.2010.10.182  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:5  AU: Zhang, A. M.;Zhu, W. H.;Wu, X. S.;Qing, B.;
7:5:32:1     4d-5p Orbital Mixing and Asymmetric In 4d-O 2p Hybridization in InMnO3: A New Bonding Mechanism for Hexagonal Ferroelectricity
DOI:10.1103/PhysRevLett.106.047601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:19  AU: Oak, Min-Ae;Lee, Jung-Hoon;Jang, Hyun Myung;Goh, Jung Suk;Choi, Hyoung Joon;Scott, James F.;
7:5:32:2     Local spin-coupled distortions in multiferroic hexagonal HoMnO3
DOI:10.1103/PhysRevB.81.054101  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Tyson, T. A.;Wu, T.;Ahn, K. H.;Kim, S. -B.;Cheong, S. -W.;
7:5:32:3     Atomistic simulation study of defects in h-HoMnO3
DOI:10.1063/1.4803149  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Jiang, Ning;Zhang, X.;
7:5:32:4     Spin frustration and spin-lattice coupling in multiferroic hexagonal HoMnO3 investigated by the first principles
DOI:10.1016/j.jmmm.2014.01.060  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Zhong, Chonggui;Dong, Zhengchao;Li, Chengdi;Zhao, Jinglong;
7:5:32:5     Asymmetric Ho 5d-O 2p hybridization as the origin of hexagonal ferroelectricity in multiferroic HoMnO3
DOI:10.1103/PhysRevB.84.153106  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Oak, Min-Ae;Lee, Jung-Hoon;Jang, Hyun Myung;
7:5:32:6     Role of the apical oxygen in the low-temperature magnetoelectric effect in RMnO3 (R = Ho and Lu)
DOI:10.1103/PhysRevB.85.134445  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Vermette, J.;Jandl, S.;Orlita, M.;Gospodinov, M. M.;
7:5:32:7     Structural, dielectric, antiferromagnetic, and thermal properties of the frustrated hexagonal Ho1-xErxMnO3 manganites
DOI:10.1103/PhysRevB.83.144404  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Liu, Peng;Wang, Xiao-Lin;Cheng, Zhen-Xiang;Du, Yi;Kimura, Hideo;
7:5:32:8     Frustration-driven magnetic order in hexagonal InMnO3
DOI:10.1103/PhysRevB.84.054455  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Fabreges, X.;Mirebeau, I.;Petit, S.;Bonville, P.;Belik, A. A.;
7:5:32:9     Ferroelectricity in single crystal InMnO3
DOI:10.1063/1.4803171  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Yu, T.;Gao, P.;Wu, T.;Tyson, T. A.;Lalancette, R.;
7:5:32:10     Artificially imposed hexagonal ferroelectricity in canted antiferromagnetic YFeO3 epitaxial thin films
DOI:10.1016/j.matchemphys.2012.12.086  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:2  AU: Ahn, Suk-Jin;Lee, Jung-Hoon;Jeong, Young Kyu;Na, Eun-Hye;Koo, Yang Mo;Jang, Hyun Myung;
7:5:32:11     High-pressure structural stability of multiferroic hexagonal RMnO3 (R = Y, Ho, Lu)
DOI:10.1103/PhysRevB.83.224113  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Gao, P.;Chen, Z.;Tyson, T. A.;Wu, T.;Ahn, K. H.;Liu, Z.;Tappero, R.;Kim, S. B.;Cheong, S-W.;
7:5:32:12     Measurements and ab initio molecular dynamics simulations of the high temperature ferroelectric transition in hexagonal RMnO3
DOI:10.1063/1.3656698  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Tyson, T. A.;Wu, T.;Chen, H. Y.;Bai, J.;Ahn, K. H.;Pandya, K. I.;Kim, S. B.;Cheong, S. -W.;
7:5:32:13     Mode coupling between nonpolar and polar phonons as the origin of improper ferroelectricity in hexagonal LuMnO3
DOI:10.1039/c4tc00182f  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:0  AU: Song, Seungwoo;Lee, Jung-Hoon;Jang, Hyun Myung;
7:5:32:14     Phase transformation in hexagonal ErMnO3 under high pressure
DOI:10.1063/1.4768285  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Lin, Chuanlong;Liu, Jing;Li, Xiaodong;Li, Yanchun;Chu, Shenqi;Xiong, Lun;Li, Rui;
7:5:32:15     Specific heat and magnetic order of La(0.2)Ca(0.8)MnO(3)
DOI:10.1063/1.3354074  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Markovich, V.;Wieckowski, J.;Gutowska, M.;Szewczyk, A.;Wisniewski, A.;Martin, C.;Gorodetsky, G.;
7:5:32:16     The covalent bonding interaction in the ferroelectric LuMnO3
DOI:10.1063/1.3655986  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Ahn, Suk-Jin;Kim, Jinyoung;Shin, Namsoo;Koo, Yang-Mo;
7:5:33:1     A Polar Corundum Oxide Displaying Weak Ferromagnetism at Room Temperature
DOI:10.1021/ja208395z  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:16  AU: Li, Man-Rong;Adem, Umut;McMitchell, Sean R. C.;Xu, Zhongling;Thomas, Chris I.;Warren, John E.;Giap, Duong V.;Niu, Hongjun;Wan, Xinming;Palgrave, Robert G.;Schiffmann, Florian;Cora, Furio;Slater, Ben;Burnett, Tim L.;Cain, Markys G.;Abakumov, Artem M.;van Tendeloo, Gustaaf;Thomas, Michael F.;Rosseinsky, Matthew J.;Claridge, John B.;
7:5:33:2     Crystal Structures and Properties of Perovskites ScCrO3 and InCrO3 with Small Ions at the A Site
DOI:10.1021/cm3009144  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:11  AU: Belik, Alexei A.;Matsushita, Yoshitaka;Tanaka, Masahiko;Takayama-Muromachi, Eiji;
7:5:33:3     High-Pressure Synthesis and Local Structure of Corundum-Type In2-2xZnxSnxO3 (x <= 0.7)
DOI:10.1021/ja106048x  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:13  AU: Hoel, Cathleen A.;Gallardo Amores, Jose Manuel;Moran, Emilio;Angel Alario-Franco, Miguel;Gaillard, Jean-Francois;Poeppelmeier, Kenneth R.;
7:5:33:4     Room-Temperature Polar Ferromagnet ScFeO3 Transformed from a High-Pressure Orthorhombic Perovskite Phase
DOI:10.1021/ja507958z  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2014
  TC:0  AU: Kawamoto, Takahiro;Fujita, Koji;Yamada, Ikuya;Matoba, Tomohiko;Kim, Sung Joo;Gao, Peng;Pan, Xiaoqing;Findlay, Scott D.;Tassel, Cedric;Kageyama, Hiroshi;Studer, Andrew J.;Hester, James;Irifune, Tetsuo;Akamatsu, Hirofumi;Tanaka, Katsuhisa;
7:5:33:5     High-Pressure Synthesis, Crystal Structure, and Phase Stability Relations of a LiNbO3-Type Polar Titanate ZnTiO3 and Its Reinforced Polarity by the Second-Order Jahn-Teller Effect
DOI:10.1021/ja408931v  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2014
  TC:5  AU: Inaguma, Yoshiyuki;Aimi, Akihisa;Shirako, Yuichi;Sakurai, Daichi;Mori, Daisuke;Kojitani, Hiroshi;Akaogi, Masaki;Nakayama, Masanobu;
7:5:33:6     Perovskite, LiNbO3, Corundum, and Hexagonal Polymorphs of (In1-xMx)MO3
DOI:10.1021/ja2010362  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:16  AU: Belik, Alexei A.;Furubayashi, Takao;Yusa, Hitoshi;Takayama-Muromachi, Eiji;
7:5:33:7     Synthesis, Structural Transformation, Thermal Stability, Valence State, and Magnetic and Electronic Properties of PbNiO3 with Perovskite- and LiNbO3-Type Structures
DOI:10.1021/ja206247j  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:19  AU: Inaguma, Yoshiyuki;Tanaka, Kie;Tsuchiya, Takeshi;Mori, Daisuke;Katsumata, Tetsuhiro;Ohba, Tomonori;Hiraki, Ko-ichi;Takahashi, Toshihiro;Saitoh, Hiroyuki;
7:5:33:8     High-Pressure Synthesis of A-Site Ordered Double Perovskite CaMnTi2O6 and Ferroelectricity Driven by Coupling of A-Site Ordering and the Second-Order Jahn-Teller Effect
DOI:10.1021/cm500016z  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:4  AU: Aimi, Akihisa;Mori, Daisuke;Hiraki, Ko-ichi;Takahashi, Toshihiro;Shan, Yue Jin;Shirako, Yuichi;Zhou, Jianshi;Inaguma, Yoshiyuki;
7:5:33:9     Designing Polar and Magnetic Oxides: Zn2FeTaO6 - in Search of Multiferroics
DOI:10.1021/ja502774v  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2014
  TC:2  AU: Li, Man-Rong;Stephens, Peter W.;Retuerto, Maria;Sarkar, Tapati;Grams, Christoph P.;Hemberger, Joachim;Croft, Mark C.;Walker, David;Greenblatt, Martha;
7:5:33:10     Intriguing sequence of GaFeO3 structures and electronic states to 70 GPa
DOI:10.1103/PhysRevB.84.094109  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Arielly, R.;Xu, W. M.;Greenberg, E.;Rozenberg, G. Kh.;Pasternak, M. P.;Garbarino, G.;Clark, S.;Jeanloz, R.;
7:5:33:11     Highly Stable Cooperative Distortion in a Weak Jahn-Teller d(2) Cation: Perovskite-Type ScVO3 Obtained by High-Pressure and High-Temperature Transformation from Bixbyite
DOI:10.1021/ja109376s  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:11  AU: Castillo-Martinez, Elizabeth;Bieringer, Mario;Shafi, Shahid P.;Cranswick, Lachlan M. D.;Angel Alario-Franco, Miguel;
7:5:33:12     Pulsed-laser deposition of heteroepitaxial corundum-type ZITO: cor-In-2 (-) (2x) ZnxSnxO3
DOI:10.1016/j.tsf.2011.10.012  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Hoel, Cathleen A.;Buchholz, D. Bruce;Chang, Robert P. H.;Poeppelmeier, Kenneth R.;
7:5:34:1     Study on magnetic and dielectric properties of YMnO3 ceramics
DOI:10.1016/j.jallcom.2011.04.128  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:14  AU: Zhang, Chao;Su, Jie;Wang, Xiaofei;Huang, Fengzhen;Zhang, Junting;Liu, Yaoyang;Zhang, Liang;Min, Kangli;Wang, Zhijun;Lu, Xiaomei;Yan, Feng;Zhu, Jinsong;
7:5:34:2     Size-dependent thermal properties of multiferroic ErMnO3 nanoparticles using photopyroelectric technique
DOI:10.1016/j.jallcom.2013.06.018  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Raneesh, B.;Soumya, H.;Philip, J.;Kalarikkal, Nandakumar;
7:5:34:3     Hydrothermal synthesis, magnetism and resistivity of orthorhombic perovskite manganates Y1-xCaxMnO3 (x=0, 0.07, 0.55, 0.65)
DOI:10.1016/j.jallcom.2013.03.220  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Zhou, Zhiqiang;Guo, Li;Ye, Feng;
7:5:34:4     Enhanced magnetization and magnetoelectric coupling in hydrogen treated hexagonal YMnO3
DOI:10.1016/j.jallcom.2010.09.181  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Kumar, Nagesh;Gaur, Anurag;Varma, G. D.;
7:5:34:5     The grain size and temperature dependence of the thermal conductivity of polycrystalline, tetragonal yttria-stabilized zirconia
DOI:10.1063/1.3593383  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Limarga, Andi M.;Clarke, David R.;
7:5:34:6     Mechanical properties of the hexagonal HoMnO3 thin films by nanoindentation
DOI:10.1016/j.jallcom.2010.08.109  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Yen, Cheng-Yo;Jian, Sheng-Rui;Lai, Yi-Shao;Yang, Ping-Feng;Liao, Ying-Yen;Jang, Jason Shian-Ching;Lin, Tjung-Han;Juang, Jenh-Yih;
7:5:34:7     Structural and magnetic properties of geometrically frustrated multiferroic ErMnO3 nanoparticles
DOI:10.1016/j.jallcom.2012.11.019  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Raneesh, B.;Saha, A.;Das, D.;Kalarikkal, Nandakumar;
7:5:34:8     Thermal (Kapitza) resistance of interfaces in compositional dependent ZnO-In2O3 superlattices
DOI:10.1063/1.4809784  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Liang, Xin;Baram, Mor;Clarke, David R.;
7:5:34:9     Magnetoelectric properties of multiferroic composites (1-x) ErMnO3-xY(3)Fe(5)O(12) at room temperature
DOI:10.1016/j.jallcom.2014.05.155  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Raneesh, B.;Soumya, H.;Philip, J.;Thomas, S.;Nandakumar, K.;
7:5:34:10     Dielectric relaxation and enhanced multiferroic properties in YMn0.8Fe0.2O3 ceramics prepared by in situ spark plasma sintering
DOI:10.1016/j.ceramint.2009.11.002  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:6  AU: Ma, Yan;Chen, Xiang Ming;Wu, Yong Jun;Lin, Yi Qi;
7:5:34:11     Structural and magnetic properties of (La0.70-xYx)Ba0.30Mn1-xFexO3 perovskites simultaneously doped on A and B sites (0.0 <= x <= 0.30)
DOI:10.1016/j.jallcom.2010.04.073  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Kallel, Nabil;Ben Abdelkhalek, Sonia;Kallel, Sami;Pena, Octavio;Oumezzine, Mohamed;
7:5:34:12     Dielectric and aging behavior of multiferroic YbMnO3 ceramics
DOI:10.1016/j.jallcom.2010.01.102  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Wu, Y. J.;Tang, L. H.;Li, H. L.;Chen, X. M.;
7:5:34:13     Fabrication and texture evolution of hexagonal YMnO3 nanofibers by electrospinning
DOI:10.1016/j.matlet.2009.11.035  JN:MATERIALS LETTERS  PY:2010
  TC:6  AU: Ye, Yangxue;Fan, Huiqing;Li, Jin;
7:5:34:14     Nonlinear optical absorption studies of sol-gel derived Yttrium Iron Garnet (Y3Fe5O12) nanoparticles by Z-scan technique
DOI:10.1016/j.ceramint.2011.10.005  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Raneesh, B.;Rejeena, I.;Rehana, P. U.;Radhakrishnan, P.;Saha, A.;Kalarikkal, N.;
7:5:35:1     Magnetic structure and electric field effects in multiferroic YMn2O5
DOI:10.1103/PhysRevB.84.104416  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: de Souza, R. A.;Staub, U.;Scagnoli, V.;Garganourakis, M.;Bodenthin, Y.;Huang, S. -W.;Garcia-Fernandez, M.;Ji, S.;Lee, S. -H.;Park, S.;Cheong, S. -W.;
7:5:35:2     Antiferromagnetically Spin Polarized Oxygen Observed in Magnetoelectric TbMn2O5
DOI:10.1103/PhysRevLett.105.087203  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:16  AU: Beale, T. A. W.;Wilkins, S. B.;Johnson, R. D.;Bland, S. R.;Joly, Y.;Forrest, T. R.;McMorrow, D. F.;Yakhou, F.;Prabhakaran, D.;Boothroyd, A. T.;Hatton, P. D.;
7:5:35:3     Observation of Electronic Ferroelectric Polarization in Multiferroic YMn2O5
DOI:10.1103/PhysRevLett.107.057201  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:14  AU: Partzsch, S.;Wilkins, S. B.;Hill, J. P.;Schierle, E.;Weschke, E.;Souptel, D.;Buechner, B.;Geck, J.;
7:5:35:4     Evolution of magnetic phases in single crystals of SrFe1-xCoxO3 solid solution
DOI:10.1103/PhysRevB.86.064436  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Long, Y. W.;Kaneko, Y.;Ishiwata, S.;Tokunaga, Y.;Matsuda, T.;Wadati, H.;Tanaka, Y.;Shin, S.;Tokura, Y.;Taguchi, Y.;
7:5:35:5     Reversing ferroelectric polarization in multiferroic DyMn2O5 by nonmagnetic Al substitution of Mn
DOI:10.1063/1.4891979  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhao, Z. Y.;Liu, M. F.;Li, X.;Wang, J. X.;Yan, Z. B.;Wang, K. F.;Liu, J-M;
7:5:35:6     Large scale and fast synthesis of multiferroic TbMn2O5 single-crystalline nanorods
DOI:10.1016/j.materresbull.2013.12.005  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: An, Xiaoxin;Wang, You;Deng, Jinxia;Chen, Jun;Xing, Xianran;
7:5:35:7     Magnetic order of multiferroic ErMn2O5 studied by resonant soft x-ray Bragg diffraction
DOI:10.1103/PhysRevB.81.144401  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Staub, U.;Bodenthin, Y.;Garcia-Fernandez, M.;de Souza, R. A.;Garganourakis, M.;Golovenchits, E. I.;Sanina, V. A.;Lushnikov, S. G.;
7:5:35:8     Magnetically induced electric polarization reversal in multiferroic TbMn2O5: Terbium spin reorientation studied by resonant x-ray diffraction
DOI:10.1103/PhysRevB.83.054438  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Johnson, R. D.;Mazzoli, C.;Bland, S. R.;Du, C-H.;Hatton, P. D.;
7:5:35:9     Magnetic structure of DyMn2O5 determined by resonant x-ray scattering
DOI:10.1103/PhysRevB.85.224403  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Johnstone, G. E.;Ewings, R. A.;Johnson, R. D.;Mazzoli, C.;Walker, H. C.;Boothroyd, A. T.;
7:5:35:10     Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5
DOI:10.1103/PhysRevB.85.094408  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Leo, N.;Meier, D.;Pisarev, R. V.;Lee, N.;Cheong, S. -W.;Fiebig, M.;
7:5:35:11     Nonstoichiometry Effect on Magnetoelectric Coupling in Cuprate Multiferroics
DOI:10.1080/00150193.2013.778688  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Panov, Yu. D.;Moskvin, A. S.;Fedorova, N. S.;Drechsler, S. -L.;
7:5:35:12     Hydrothermal synthesis of DyMn2O5 nanorods and their magnetic properties
DOI:10.1016/j.jallcom.2013.08.131  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Wu, Songping;Mei, Youxian;
7:5:35:13     Polar atomic displacements in multiferroics observed via anomalous x-ray diffraction
DOI:10.1103/PhysRevB.81.012103  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Azimonte, C.;Granado, E.;Terashita, H.;Park, S.;Cheong, S-W.;
7:5:35:14     X-ray diffraction study of the temperature-induced structural phase transitions in SmVO3
DOI:10.1103/PhysRevB.85.224102  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Johnson, R. D.;Tang, C. C.;Evans, I. R.;Bland, S. R.;Free, D. G.;Beale, T. A. W.;Hatton, P. D.;Bouchenoire, L.;Prabhakaran, D.;Boothroyd, A. T.;
7:5:35:15     Strong magnetoelastic effect on the magnetoelectric phenomena of TbMn2O5
DOI:10.1103/PhysRevB.83.060405  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Oh, Yoon Seok;Jeon, Byung-Gu;Haam, S. Y.;Park, S.;Correa, V. F.;Lacerda, A. H.;Cheong, S. -W.;Jeon, Gun Sang;Kim, Kee Hoon;
7:5:35:16     Magnetic ordering in NdMn2O5 studied by the neutron diffraction
DOI:10.1016/j.jmmm.2013.10.034  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Zobkalo, I. A.;Gavrilov, S. V.;Nyi, N. Z. Saw;Barilo, S. N.;Shiryaev, S. V.;
7:5:35:17     Measuring Friedel pairs in nanomembranes of GaAs (001)
DOI:10.1007/s11051-013-1527-3  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:0  AU: Freitas, Raul O.;Deneke, Christoph F.;Malachias, Angelo;Darin, Gaspar;Morelhao, Sergio L.;
7:5:36:1     Impact of the various spin- and orbital-ordering processes on the multiferroic properties of orthovanadate DyVO3
DOI:10.1103/PhysRevB.90.024418  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Zhang, Q.;Singh, K.;Simon, C.;Tung, L. D.;Balakrishnan, G.;Hardy, V.;
7:5:36:2     Transport and magnetic properties in the Dy1-xCaxVO3 ceramics
DOI:10.1016/j.jallcom.2013.01.075  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Zhao, Bangchuan;Huang, Yanan;Yang, Jie;Dai, Dongqin;Dai, Jianming;Sun, Yuping;
7:5:36:3     Critical competition between two distinct orbital-spin ordered states in perovskite vanadates
DOI:10.1103/PhysRevB.82.144425  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Fujioka, J.;Yasue, T.;Miyasaka, S.;Yamasaki, Y.;Arima, T.;Sagayama, H.;Inami, T.;Ishii, K.;Tokura, Y.;
7:5:36:4     Spin and orbital ordering in Y1-xLaxVO3
DOI:10.1103/PhysRevB.84.214405  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Yan, J-Q.;Zhou, J-S.;Cheng, J. G.;Goodenough, J. B.;Ren, Y.;Llobet, A.;McQueeney, R. J.;
7:5:36:5     Structural and magnetic phase transitions of the orthovanadates RVO3 (R = Dy, Ho, Er) as seen via neutron diffraction
DOI:10.1103/PhysRevB.83.064404  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Reehuis, M.;Ulrich, C.;Prokes, K.;Mat'as, S.;Fujioka, J.;Miyasaka, S.;Tokura, Y.;Keimer, B.;
7:5:36:6     Dy-V magnetic interaction and local structure bias on the complex spin and orbital ordering in Dy1-xTbxVO3 (x=0 and 0.2)
DOI:10.1103/PhysRevB.87.224404  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Yan, J. -Q.;Cao, H. B.;McGuire, M. A.;Ren, Y.;Sales, B. C.;Mandrus, D. G.;
7:5:36:7     Effects of cation-size variance on spin and orbital orders in Eu1-x(La0.254Y0.746)(x) VO3
DOI:10.1103/PhysRevB.84.140409  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Fukuta, R.;Miyasaka, S.;Hemmi, K.;Tajima, S.;Kawana, D.;Ikeuchi, K.;Yamasaki, Y.;Nakao, A.;Nakao, H.;Murakami, Y.;Iwasa, K.;
7:5:36:8     Bulk modulus and thermal properties of RVO3 (R = La, Ce, Pr, Nd)
DOI:10.1016/j.jallcom.2012.02.173  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Gaur, N. K.;Parveen, Atahar;
7:5:36:9     Specific heat of hole-doped vanadates: Y1-xCaxVO3, Pr1-xCaxVO3 and Nd1-xSrxVO3
DOI:10.1016/j.matchemphys.2013.07.018  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:0  AU: Parveen, Atahar;Gaur, N. K.;
7:5:36:10     Magnetic phase transition in the low-dimensional compound BaMn2Si2O7
DOI:10.1103/PhysRevB.88.144405  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Ma, J.;Dela Cruz, C. D.;Hong, Tao;Tian, W.;Aczel, A. A.;Chi, Songxue;Yan, J. -Q.;Dun, Z. L.;Zhou, H. D.;Matsuda, M.;
7:5:36:11     Investigations of Thermal Properties of Earth Mantle Silicates: ASiO(3) (A = Mg, Ca)
DOI:10.1080/10584587.2010.492199  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:7  AU: Parveen, Atahar;Srivastava, Archana;Gaur, N. K.;
7:5:36:12     Metamagnetic transition of martensitic type in electron-doped manganites Ca1-xCexMnO3 (x=0.10, 0.12)
DOI:10.1016/j.jallcom.2012.11.119  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Loshkareva, N. N.;Gorbunov, D. I.;Andreev, A. V.;Mushnikov, N. V.;Skourski, Y.;Wolff-Fabris, F.;
7:5:36:13     Influence of temperature on thermal properties of (Sm, Eu) VO3
DOI:10.1016/j.jmmm.2012.04.005  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Parveen, Atahar;Gaur, N. K.;
7:5:37:1     Spin correlations in the geometrically frustrated RBaCo4O7 antiferromagnets: Mean-field approach and Monte Carlo simulations
DOI:10.1103/PhysRevB.82.094401  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Khalyavin, D. D.;Manuel, P.;Mitchell, J. F.;Chapon, L. C.;
7:5:37:2     Spin-ordering and magnetoelastic coupling in the extended kagome system YBaCo4O7
DOI:10.1103/PhysRevB.83.094412  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Khalyavin, D. D.;Manuel, P.;Ouladdiaf, B.;Huq, A.;Zheng, H.;Mitchell, J. F.;Chapon, L. C.;
7:5:37:3     Spin dynamics, short-range order, and spin freezing in Y0.5Ca0.5BaCo4O7
DOI:10.1103/PhysRevB.83.024405  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Stewart, J. R.;Ehlers, G.;Mutka, H.;Fouquet, P.;Payen, C.;Lortz, R.;
7:5:37:4     Possible chiral spin-liquid phase in noncentrosymmetric RBaCo4O7
DOI:10.1103/PhysRevB.85.220401  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Khalyavin, D. D.;Manuel, P.;Chapon, L. C.;
7:5:37:5     Spin-liquid phase and order by disorder of classical Heisenberg spins on the swedenborgite lattice
DOI:10.1103/PhysRevB.90.020403  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Buhrandt, Stefan;Fritz, Lars;
7:5:37:6     Oxygen Stoichiometry in the Geometrically Frustrated Kagome System YBaCo4O7+delta: Impact on Phase Behavior and Magnetism
DOI:10.1021/cm401710b  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:3  AU: Avci, S.;Chmaissem, O.;Zheng, H.;Huq, A.;Manuel, P.;Mitchell, J. F.;
7:5:37:7     Spin correlations in the extended kagome system YBaCo3FeO7
DOI:10.1103/PhysRevB.84.224426  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Valldor, Martin;Hermann, Raphael P.;Wuttke, Joachim;Zamponi, Michaela;Schweika, Werner;
7:5:37:8     Kinetic control of structural and magnetic states in LuBaCo4O7
DOI:10.1103/PhysRevB.85.094414  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Avci, S.;Chmaissem, O.;Zheng, H.;Huq, A.;Khalyavin, D. D.;Stephens, P. W.;Suchomel, M. R.;Manuel, P.;Mitchell, J. F.;
7:5:37:9     Evidence for an internal-field-induced spin-flop configuration in the extended kagome YBaCo4O7
DOI:10.1103/PhysRevB.87.064419  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Hoch, M. J. R.;Kuhns, P. L.;Yuan, S.;Besara, T.;Whalen, J. B.;Siegrist, T.;Reyes, A. P.;Brooks, J. S.;Zheng, H.;Mitchell, J. F.;
7:5:37:10     Spin ordering and dynamics in the frustrated antiferromagnet YBaCo4O7.1
DOI:10.1103/PhysRevB.89.094416  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Yuan, S.;Hu, X.;Kuhns, P. L.;Reyes, A. P.;Brooks, J. S.;Besara, T.;Siegrist, T.;Zheng, H.;Mitchell, J. F.;Hoch, M. J. R.;
7:5:37:11     Geometrical analysis of superstructures in YBaCo4O8.5 by electron diffraction
DOI:10.1016/j.ssi.2011.10.002  JN:SOLID STATE IONICS  PY:2011
  TC:2  AU: Jia, Yan;Jiang, Hua;Valkeapaa, Markus;Dai, Rui;Yamauchi, Hisao;Karppinen, Maarit;Kauppinen, Esko I.;
7:5:37:12     Antiferromagnetic Ising model on the swedenborgite lattice
DOI:10.1103/PhysRevB.90.094415  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Buhrandt, Stefan;Fritz, Lars;
7:5:37:13     Study of YBaCo4O7 (+) (delta) thin films grown by sputtering technique on (1012)-oriented sapphire substrates
DOI:10.1016/j.tsf.2010.12.129  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Montoya, J. F.;Izquierdo, J. L.;Gomez, A.;Arnache, O.;Osorio, J.;Marin, J.;Paucar, C.;Moran, O.;
7:5:37:14     Spin-ordering and magnetoelastic coupling in the extended kagome system YBaCo4O7 (vol 83, 094412, 2011)
DOI:10.1103/PhysRevB.83.219902  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Khalyavin, D. D.;Manuel, P.;Ouladdiaf, B.;Huq, A.;Zheng, H.;Mitchell, J. F.;Chapon, L. C.;
7:5:37:15     Spin-ordering and magnetoelastic coupling in the extended kagome system YBaCo4O7 (vol 83, 094412, 2011)
DOI:10.1103/PhysRevB.85.059903  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Khalyavin, D. D.;Manuel, P.;Ouladdiaf, B.;Huq, A.;Stephens, P. W.;Zheng, H.;Mitchell, J. F.;Chapon, L. C.;
7:5:37:16     Magnetic response of polycrystalline YBaCo4O7+delta synthesized through the physical and chemical route: The role of phase inhomogeneities
DOI:10.1016/j.jmmm.2014.01.049  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Vallejos, E.;Galeano, V.;Gomez, L.;Izquierdo, J. L.;Montoya, J. F.;Mera, J.;Cordoba, C.;Gomez, A.;Paucar, C.;Moran, O.;
7:5:37:17     Growing of YBaCo4O7+delta thin films on alpha-Al2O3 and SrTiO3 substrates by means of the pulsed laser deposition technique
DOI:10.1016/j.tsf.2013.07.057  JN:THIN SOLID FILMS  PY:2013
  TC:0  AU: Gomez, A.;Fuchs, D.;Moran, O.;
7:5:38:1     Magnetodielectric effect in EuZrO3
DOI:10.1063/1.3456730  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:23  AU: Kolodiazhnyi, T.;Fujita, K.;Wang, L.;Zong, Y.;Tanaka, K.;Sakka, Y.;Takayama-Muromachi, E.;
7:5:38:2     Theoretical investigations on the magnetocaloric and barocaloric effects in TbyGd(1-y)Al2 series
DOI:10.1016/j.jallcom.2013.02.068  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Ribeiro, P. O.;Alho, B. P.;Alvarenga, T. S. T.;Nobrega, E. P.;Carvalho, A. Magnus G.;de Sousa, V. S. R.;Caldas, A.;de Oliveira, N. A.;von Ranke, P. J.;
7:5:38:3     Magnetocaloric effects in Er1-xTbxAl2 alloys
DOI:10.1063/1.3335590  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Khan, Mahmud;Gschneidner, K. A., Jr.;Pecharsky, V. K.;
7:5:38:4     The exchange interaction values of perovskite-type materials EuTiO3 and EuZrO3
DOI:10.1063/1.4902167  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Hu, Ai-Yuan;Wang, Huai-Yu;
7:5:38:5     Anisotropic magnetocaloric effect in antiferromagnetic systems: Application to EuTiO3
DOI:10.1063/1.4895996  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Alho, B. P.;Carvalho, A. Magnus G.;von Ranke, P. J.;
7:5:38:6     Investigation on the magnetocaloric effect in (Gd,Pr)Al-2 solid solutions
DOI:10.1016/j.jmmm.2010.10.046  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:10  AU: de Sousa, V. S. R.;Carvalho, A. Magnus G.;Plaza, E. J. R.;Alho, B. P.;Tedesco, J. C. G.;Coelho, A. A.;de Oliveira, N. A.;von Ranke, P. J.;
7:5:38:7     The influence of magnetic and electric coupling properties on the magnetocaloric effect in quantum paraelectric EuTiO3
DOI:10.1016/j.jmmm.2011.11.037  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: von Ranke, P. J.;Alho, B. P.;Nobrega, E. P.;de Sousa, V. S. R.;Alvarenga, T. S. T.;Carvalho, A. Magnus G.;de Oliveira, N. A.;
7:5:38:8     Structure and physical properties of EuTa2O6 tungsten bronze polymorph
DOI:10.1063/1.48930111  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Kolodiazhnyi, T.;Sakurai, H.;Vasylkiv, O.;Borodianska, H.;Forbes, S.;Mozharivskyj, Y.;
7:5:38:9     A discussion on the magnetization calculation in polycrystalline antiferromagnetic system: Application to EuTiO3
DOI:10.1016/j.jmmm.2011.08.014  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Alho, B. P.;Carvalho, A. Magnus G.;von Ranke, P. J.;
7:5:38:10     The solid solution Gd(2)Ni(x)Cu(2-x)Mg: Large reversible magnetocaloric effect and a drastic change of the magnetism by substitution
DOI:10.1063/1.3466775  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Linsinger, Stefan;Hermes, Wilfried;Eul, Matthias;Poettgen, Rainer;
7:5:38:11     Theoretical investigation on the existence of inverse and direct magnetocaloric effect in perovskite EuZrO3
DOI:10.1063/1.3582144  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Alho, B. P.;Nobrega, E. P.;de Sousa, V. S. R.;Carvalho, A. Magnus G.;de Oliveira, N. A.;von Ranke, P. J.;
7:5:38:12     Spin reorientation and the magnetocaloric effect in HoyEr(1-y)N
DOI:10.1063/1.4728201  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: von Ranke, P. J.;Alvarenga, T. S. T.;Alho, B. P.;Nobrega, E. P.;Ribeiro, P. O.;Carvalho, A. Magnus G.;de Sousa, V. S. R.;Caldas, A.;de Oliveira, N. A.;
7:5:38:13     Abnormal thermal conductivity in tetragonal tungsten bronze Ba6-xSrxNb10O30
DOI:10.1063/1.4868876  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Kolodiazhnyi, T.;Sakurai, H.;Vasylkiv, O.;Borodianska, H.;Mozharivskyj, Y.;
7:5:38:14     Magnetic properties and magnetocaloric effect in Nd5Si3 compound
DOI:10.1063/1.3359811  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Tian, Guang;Du, Honglin;Zhang, Yan;Xia, Yuanhua;Wang, Changsheng;Han, Jingzhi;Liu, Shunquan;Yang, Jinbo;
7:5:39:1     Giant magnetoelectric effect in HoAl3(BO3)(4)
DOI:10.1103/PhysRevB.83.180417  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Liang, K. -C.;Chaudhury, R. P.;Lorenz, B.;Sun, Y. Y.;Bezmaternykh, L. N.;Temerov, V. L.;Chu, C. W.;
7:5:39:2     Direct and inverse magnetoelectric effects in HoAl3(BO3)(4) single crystal
DOI:10.1063/1.4874270  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Freydman, A. L.;Balaev, A. D.;Dubrovskiy, A. A.;Eremin, E. V.;Temerov, V. L.;Gudim, I. A.;
7:5:39:3     Single magnetic chirality in the magnetoelectric NdFe3((BO3)-B-11)(4)
DOI:10.1103/PhysRevB.81.094429  JN:PHYSICAL REVIEW B  PY:2010
  TC:24  AU: Janoschek, M.;Fischer, P.;Schefer, J.;Roessli, B.;Pomjakushin, V.;Meven, M.;Petricek, V.;Petrakovskii, G.;Bezmaternikh, L.;
7:5:39:4     First principles results on TbAl3(BO3)(4): A promising magneto-optical material
DOI:10.1063/1.3662176  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Saeed, Y.;Singh, N.;Schwingenschloegl, U.;
7:5:39:5     Magnetoelectricity and magnetostriction due to the rare-earth moment in TmAl3(BO3)(4)
DOI:10.1103/PhysRevB.81.220402  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Chaudhury, R. P.;Lorenz, B.;Sun, Y. Y.;Bezmaternykh, L. N.;Temerov, V. L.;Chu, C. W.;
7:5:39:6     Quantum theory of magnetoelectricity in rare-earth multiferroics: Nd, Sm, and Eu ferroborates
DOI:10.1103/PhysRevB.87.024413  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Popov, A. I.;Plokhov, D. I.;Zvezdin, A. K.;
7:5:39:7     Magnetoelectric responses from the respective magnetic R and Fe subsystems in the noncentrosymmetric antiferromagnets RFe3(BO3)(4) (R = Eu, Gd, and Tb)
DOI:10.1103/PhysRevB.89.195126  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Kurumaji, T.;Ohgushi, K.;Tokura, Y.;
7:5:39:8     Magnetic Frustration, Phase Competition, and the Magnetoelectric Effect in NdFe3(BO3)(4)
DOI:10.1103/PhysRevLett.109.267202  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:6  AU: Hamann-Borrero, J. E.;Partzsch, S.;Valencia, S.;Mazzoli, C.;Herrero-Martin, J.;Feyerherm, R.;Dudzik, E.;Hess, C.;Vasiliev, A.;Bezmaternykh, L.;Buechner, B.;Geck, J.;
7:5:39:9     High Eu 4f low-energy oscillator strength in the isostructural rare-earth Zintl compounds EuIn2X2 (X = P,As)
DOI:10.1063/1.3702787  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Singh, N.;Schwingenschloegl, U.;
7:5:39:10     The Faraday effect in TbFe3(BO3)(4) and TbAl3(BO3)(4) borates
DOI:10.1016/j.jmmm.2014.03.034  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Bedarev, V. A.;Pashchenko, M. I.;Merenkov, D. N.;Savina, Yu O.;Pashchenko, V. O.;Gnatchenko, S. L.;Bezmaternykh, L. N.;Temerov, V. L.;
7:5:39:11     Nonresonant x-ray magnetic scattering on rare-earth iron borates RFe3(BO3)(4)
DOI:10.1103/PhysRevB.82.094411  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Hamann-Borrero, J. E.;Philipp, M.;Kataeva, O.;Zimmermann, M. V.;Geck, J.;Klingeler, R.;Vasiliev, A.;Bezmaternykh, L.;Buechner, B.;Hess, C.;
7:5:39:12     Spectroscopic properties of HoAl3(BO3)(4) single crystal
DOI:10.1016/j.optmat.2014.05.036  JN:OPTICAL MATERIALS  PY:2014
  TC:3  AU: Ikonnikov, D. A.;Malakhovskii, A. V.;Sukhachev, A. L.;Temerov, V. L.;Krylov, A. S.;Bovina, A. F.;Aleksandrovsky, A. S.;
7:5:39:13     Short-range correlations and their thermal hysteresis in the paramagnetic phase of YFe3(BO3)(4)
DOI:10.1103/PhysRevB.83.140406  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Rebbouh, L.;Desautels, R. D.;Ritter, C.;Cadogan, J. M.;Temerov, V.;Pankrats, A.;van Lierop, J.;
7:5:39:14     High-temperature magnetoelectricity of terbium aluminum borate: The role of excited states of the rare-earth ion
DOI:10.1103/PhysRevB.89.014418  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kadomtseva, A. M.;Popov, Yu. F.;Vorob'ev, G. P.;Kostyuchenko, N. V.;Popov, A. I.;Mukhin, A. A.;Ivanov, V. Yu.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Pyatakov, A. P.;Zvezdin, A. K.;
7:5:39:15     Ab initio studies on the mechanism for linear and nonlinear optical effects in YAl(3)(BO(3))(4)
DOI:10.1063/1.3587571  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: He, Ran;Lin, Z. S.;Lee, M. -H.;Chen, C. T.;
7:5:39:16     Role of the dimensionality of the [GaX](2) network in the Zintl phases EuGa2X2
DOI:10.1063/1.4767363  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Singh, Nirpendra;Poettgen, Rainer;Schwingenschloegl, Udo;
7:5:40:1     Magnetoelectric coupling in MnTiO3
DOI:10.1103/PhysRevB.83.104416  JN:PHYSICAL REVIEW B  PY:2011
  TC:13  AU: Mufti, N.;Blake, G. R.;Mostovoy, M.;Riyadi, S.;Nugroho, A. A.;Palstra, T. T. M.;
7:5:40:2     Magnetoelectric Effect in an XY-like Spin Glass System NixMn1-xTiO3
DOI:10.1103/PhysRevLett.108.057203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:16  AU: Yamaguchi, Y.;Nakano, T.;Nozue, Y.;Kimura, T.;
7:5:40:3     Magnetoelectric coupling in the Haldane spin-chain system Dy2BaNiO5
DOI:10.1103/PhysRevB.88.094438  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Singh, Kiran;Basu, Tathamay;Chowki, S.;Mahapotra, N.;Iyer, Kartik K.;Paulose, P. L.;Sampathkumaran, E. V.;
7:5:40:4     Multiferroicity and magneto-electric effect in Gd2BaNiO5
DOI:10.1063/1.4881531  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Chowki, S.;Basu, Tathamay;Singh, K.;Mohapatra, N.;Sampathkumaran, E. V.;
7:5:40:5     Coupling between phonon and crystal-field excitations in multiferroic PrFe3(BO3)(4)
DOI:10.1103/PhysRevB.90.121101  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Boldyrev, K. N.;Stanislavchuk, T. N.;Sirenko, A. A.;Bezmaternykh, L. N.;Popova, M. N.;
7:5:40:6     Magnetodielectric and magnetoelastic coupling in TbFe3(BO3)(4)
DOI:10.1103/PhysRevB.82.064406  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Adem, U.;Wang, L.;Fausti, D.;Schottenhamel, W.;van Loosdrecht, P. H. M.;Vasiliev, A.;Bezmaternykh, L. N.;Buechner, B.;Hess, C.;Klingeler, R.;
7:5:40:7     Exchange interaction mediated ferroelectricity in multiferroic MnTiO3 with anisotropic orbital hybridization and hole delocalization
DOI:10.1063/1.4866462  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Chen, S. W.;Lin, P. A.;Jeng, H. T.;Fu, S. W.;Lee, J. M.;Lee, J. F.;Pao, C. W.;Ishii, H.;Tsuei, K. D.;Hiraoka, N.;Chen, D. P.;Dou, S. X.;Wang, X. L.;Lu, K. T.;Chen, J. M.;
7:5:40:8     Magnetic and dielectric properties of quasi-two-dimensional manganese oxide Sr7Mn4O15
DOI:10.1016/j.jmmm.2012.10.007  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Gao, S.;Lv, Y. D.;Wang, X. X.;Yang, H. S.;Ruan, K. Q.;Li, X. G.;
7:5:40:9     Korringa-like relaxation in the high-temperature phase of A-site ordered YBaMn2O6
DOI:10.1103/PhysRevB.85.205121  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Schaile, S.;von Nidda, H. -A. Krug;Deisenhofer, J.;Loidl, A.;Nakajima, T.;Ueda, Y.;
7:5:40:10     Magnetic and dielectric behavior of the spin-chain compound Er2BaNiO5 well below its Neel temperature
DOI:10.1063/1.4896171  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Basu, Tathamay;Singh, Kiran;Mohapatra, N.;Sampathkumaran, E. V.;
7:5:40:11     mu SR investigation of magnetically ordered states in the A-site ordered perovskite manganites RBaMn2O6 (R = Y and La)
DOI:10.1103/PhysRevB.86.125141  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Kawasaki, Y.;Minami, T.;Izumi, M.;Kishimoto, Y.;Ohno, T.;Satoh, K. H.;Koda, A.;Kadono, R.;Gavilano, J. L.;Luetkens, H.;Nakajima, T.;Ueda, Y.;
7:5:40:12     Thermodynamic studies on single-crystalline Gd2BaNiO5
DOI:10.1103/PhysRevB.85.174402  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Popova, E. A.;Klingeler, R.;Tristan, N.;Buechner, B.;Vasiliev, A. N.;
7:5:40:13     Giant dielectric response of Haldane gap compound Y2BaNiO5
DOI:10.1063/1.3699024  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Chen, J. W.;Rao, G. Narsinga;Li, K. W.;
7:5:40:14     Spin glass behavior in A-site ordered YBaMn2O6 compound
DOI:10.1063/1.4816401  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Gao, Qing-Qing;Li, Jing-Bo;Li, Guan-Nan;Rao, Guang-Hui;Luo, Jun;Liu, Guang-Yao;Liang, Jing-Kui;
7:5:41:1     Electronic depiction of magnetic origin in undoped and Fe doped TiO2-d epitaxial thin films
DOI:10.1063/1.3640212  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Bapna, Komal;Choudhary, R. J.;Pandey, S. K.;Phase, D. M.;Sharma, S. K.;Knobel, M.;
7:5:41:2     Signature of spin-phonon coupling in Sr2CoO4 thin film: A Raman spectroscopic study
DOI:10.1063/1.4800442  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Pandey, Pankaj K.;Choudhary, R. J.;Mishra, Dileep K.;Sathe, V. G.;Phase, D. M.;
7:5:41:3     Correlation induced half-metallicity in a ferromagnetic single-layered compound: Sr2CoO4
DOI:10.1103/PhysRevB.81.035114  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Pandey, Sudhir K.;
7:5:41:4     Magnetic behavior of layered perovskite Sr2CoO4 thin film
DOI:10.1063/1.4823597  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Pandey, Pankaj K.;Choudhary, R. J.;Phase, D. M.;
7:5:41:5     Anomalous temperature dependence in valence band spectra: A resonant photoemission study of layered perovskite Sr2CoO4
DOI:10.1063/1.4876058  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Pandey, Pankaj K.;Choudhary, R. J.;Phase, D. M.;
7:5:41:6     Transport and magnetotransport study of Mg doped ZnO thin films
DOI:10.1063/1.4870864  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Agrawal, Arpana;Dar, Tanveer A.;Sen, Pratima;Phase, Deodatta M.;
7:5:41:7     Valence band structure of YMnO3 and the spin orbit coupling
DOI:10.1063/1.4804618  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Kumar, Manish;Choudhary, R. J.;Phase, D. M.;
7:5:41:8     Band offset measurements and magneto-transport properties of epitaxial TiO2-x (x=0.05)/La0.7Sr0.3MnO3 heterostructure
DOI:10.1063/1.4801845  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Choudhary, R. J.;Bapna, Komal;Phase, D. M.;
7:5:41:9     Type I and type II band alignments in ZnO/MgZnO bilayer films
DOI:10.1063/1.4893986  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Agrawal, Arpana;Dar, Tanveer Ahmad;Phase, D. M.;Sen, Pratima;
7:5:41:10     Resonant photoemission study of epitaxial La0.7Sr0.3MnO3 thin film across Curie temperature
DOI:10.1063/1.4769222  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Bapna, Komal;Choudhary, R. J.;Phase, D. M.;
7:5:41:11     Density of states, magnetic and transport properties of Nd doped two dimensional perovskite compound Sr2CoO4
DOI:10.1063/1.3672825  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Yao, Qiwen;Kimura, Hideo;Wang, X. L.;Konstantinov, Kosta;Zhao, Hongyang;Qiu, Hai;Tanahashi, Rumi;Ozawa, Kiyoshi;Dou, S. X.;
7:5:41:12     Oxygen vacancies contained TiO2 spheres: facile fabrication and enhanced ferromagnetism
DOI:10.1007/s11051-012-1030-2  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2012
  TC:4  AU: Li, Hongmei;Zeng, Yangsu;Huang, Tongcheng;Liu, Min;
7:5:41:13     Evolution of different structural phases of TiO2 fims with oxygen partial pressure and Fe doping and their electrical properties
DOI:10.1016/j.materresbull.2012.04.011  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Bapna, Komal;Choudhary, R. J.;Phase, D. M.;
7:5:41:14     Magnetic properties and phonon behavior of Pr2NiMnO6 thin films
DOI:10.1063/1.3575564  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Singh, M. P.;Truong, K. D.;Jandl, S.;Fournier, P.;
7:5:42:1     Dielectric relaxation in the DyMn1-xFexO3 system
DOI:10.1063/1.3681807  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Hong, Fang;Cheng, Zhenxiang;Zhang, Shujun;Wang, Xiaolin;
7:5:42:2     Continuously tunable magnetic phase transitions in the DyMn1-xFexO3 system
DOI:10.1063/1.3632061  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Hong, Fang;Cheng, Zhenxiang;Zhao, Hongyang;Kimura, Hideo;Wang, Xiaolin;
7:5:42:3     Small polaron migration associated multiple dielectric responses of multiferroic DyMnO3 polycrystal in low temperature region
DOI:10.1063/1.4768790  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Yang, J.;He, J.;Zhu, J. Y.;Bai, W.;Sun, L.;Meng, X. J.;Tang, X. D.;Duan, C. -G.;Remiens, D.;Qiu, J. H.;Chu, J. H.;
7:5:42:4     Temperature and frequency dependent giant magnetodielectric coupling in DyMn0.33Fe0.67O3
DOI:10.1063/1.4736543  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Hong, Fang;Cheng, Zhenxiang;Wang, Xiaolin;
7:5:42:5     Effect of Jahn-Teller distortion on magnetic ordering in Dy(Fe,Mn)O-3 perovskites
DOI:10.1103/PhysRevB.83.245105  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Chiang, F. -K.;Chu, M. -W.;Chou, F. C.;Jeng, H. T.;Sheu, H. S.;Chen, F. R.;Chen, C. H.;
7:5:42:6     A colossal dielectric constant of an amorphous TiO2:(Nb, In) film with low loss fabrication at room temperature
DOI:10.1039/c4tc00500g  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:5  AU: Gai, Zhigang;Cheng, Zhenxiang;Wang, Xiaolin;Zhao, Lanling;Yin, Na;Abah, Roza;Zhao, Minglei;Hong, Fang;Yu, Zheyin;Dou, Shixue;
7:5:42:7     Strong orbital polarization in orthorhombic DyMnO3: A combined x-ray linear dichroism and ab initio electronic structure study
DOI:10.1103/PhysRevB.81.201102  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Chen, J. M.;Hu, Z.;Jeng, H. T.;Chin, Y. Y.;Lee, J. M.;Huang, S. W.;Lu, K. T.;Chen, C. K.;Haw, S. C.;Chou, T. L.;Lin, H. -J.;Shen, C. C.;Liu, R. S.;Tanaka, A.;Tjeng, L. H.;Chen, C. T.;
7:5:42:8     Dielectric response and magnetoelectric coupling in single crystal gallium ferrite
DOI:10.1063/1.4806762  JN:AIP ADVANCES  PY:2013
  TC:2  AU: Mukherjee, Somdutta;Gupta, Rajeev;Garg, Ashish;
7:5:42:9     Magnetocapacitance effect in nonmultiferroic YFeO3 single crystal
DOI:10.1063/1.3681294  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:13  AU: Cheng, Z. X.;Shen, H.;Xu, J. Y.;Liu, P.;Zhang, S. J.;Wang, J. L.;Wang, X. L.;Dou, S. X.;
7:5:42:10     Lanthanum doped multiferroic DyFeO3: Structural and magnetic properties
DOI:10.1063/1.3360354  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Du, Y.;Cheng, Z. X.;Wang, X. L.;Dou, S. X.;
7:5:42:11     Suppression of grain boundary relaxation in Zr-doped BiFeO3 thin films
DOI:10.1063/1.4879247  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Mukherjee, Somdutta;Srivastava, Amar;Gupta, Rajeev;Garg, Ashish;
7:5:42:12     Preparation of epitaxial DyFeO3 thin films and magnetodielectric coupling
DOI:10.1016/j.tsf.2010.08.002  JN:THIN SOLID FILMS  PY:2010
  TC:3  AU: Luo, S. J.;Li, S. Z.;Zhang, N.;Wei, T.;Dong, X. W.;Wang, K. F.;Liu, J. -M.;
7:5:42:13     The demonstration of colossal magneto-capacitance effect with the promising gate stack characteristics on Ge (100) by the magnetic gate stack design
DOI:10.1063/1.4880206  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Liao, M. -H.;Huang, S. -C.;
7:5:43:1     Dynamical structure factor of the triangular-lattice antiferromagnet
DOI:10.1103/PhysRevB.88.094407  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Mourigal, M.;Fuhrman, W. T.;Chernyshev, A. L.;Zhitomirsky, M. E.;
7:5:43:2     Instability of magnons in two-dimensional antiferromagnets at high magnetic fields
DOI:10.1103/PhysRevB.81.100402  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Masuda, T.;Kitaoka, S.;Takamizawa, S.;Metoki, N.;Kaneko, K.;Rule, K. C.;Kiefer, K.;Manaka, H.;Nojiri, H.;
7:5:43:3     Magnon Breakdown in a Two Dimensional Triangular Lattice Heisenberg Antiferromagnet of Multiferroic LuMnO3
DOI:10.1103/PhysRevLett.111.257202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:5  AU: Oh, Joosung;Le, Manh Duc;Jeong, Jaehong;Lee, Jung-hyun;Woo, Hyungje;Song, Wan-Young;Perring, T. G.;Buyers, W. J. L.;Cheong, S. -W.;Park, Je-Geun;
7:5:43:4     Field-induced decay dynamics in square-lattice antiferromagnets
DOI:10.1103/PhysRevB.82.144402  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Mourigal, M.;Zhitomirsky, M. E.;Chernyshev, A. L.;
7:5:43:5     Field dependence of magnon decay in yttrium iron garnet thin films
DOI:10.1103/PhysRevB.86.060401  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Chernyshev, A. L.;
7:5:43:6     Dynamical structure factor of quasi-two-dimensional antiferromagnet in high fields
DOI:10.1103/PhysRevB.85.184405  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Fuhrman, W. T.;Mourigal, M.;Zhitomirsky, M. E.;Chernyshev, A. L.;
7:5:43:7     Anomalously large damping of long-wavelength quasiparticles caused by long-range interaction
DOI:10.1103/PhysRevB.82.024432  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Syromyatnikov, A. V.;
7:5:43:8     Tunable rotons in square-lattice antiferromagnets under strong magnetic fields
DOI:10.1103/PhysRevB.90.014421  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kubo, Yurika;Kurihara, Susumu;
7:5:43:9     Role of dimensionality in spontaneous magnon decay: Easy-plane ferromagnet
DOI:10.1103/PhysRevB.89.224415  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Stephanovich, V. A.;Zhitomirsky, M. E.;
7:5:43:10     Renormalization of the spin-wave spectrum in three-dimensional ferromagnets with dipolar interaction (vol 74, 014435, 2006)
DOI:10.1103/PhysRevB.81.139901  JN:PHYSICAL REVIEW B  PY:2010
  TC:1  AU: Syromyatnikov, A. V.;
7:5:43:11     Effects of magnetic field, anisotropy, and biquadratic interactions in type-IIA fcc antiferromagnets studied by linear spin-wave theory
DOI:10.1103/PhysRevB.85.054409  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Datta, Trinanjan;Yao, Dao-Xin;
7:5:43:12     Density functional analysis of the magnetic structures of Sr2MGe2O7 (M = Mn, Co)
DOI:10.1016/j.jmmm.2012.06.001  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:0  AU: Koo, Hyun-Joo;Lee, Changhoon;Whangbo, Myung-Hwan;
7:5:44:1     Spin-state transitions in CaFeSi2O6 and NaFeSi2O6 under pressure
DOI:10.1103/PhysRevB.83.214407  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Streltsov, S. V.;Skorikov, N. A.;
7:5:44:2     Ab initio investigation of the exchange interactions in Bi2Fe4O9: The Cairo pentagonal lattice compound
DOI:10.1103/PhysRevB.88.054424  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Pchelkina, Z. V.;Streltsov, S. V.;
7:5:44:3     Analysis of the Difference between the Pyroxenes LiFeSi2O6 and LiFeGe2O6 in Their Spin Order, Spin Orientation, and Ferrotoroidal Order
DOI:10.1021/cm5001413  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:2  AU: Lee, Changhoon;Kang, Jinhee;Hong, Jisook;Shim, Ji Hoon;Whangbo, Myung-Hwan;
7:5:44:4     Interplay between lattice, orbital, and magnetic degrees of freedom in the chain-polymer Cu(II) breathing crystals
DOI:10.1103/PhysRevB.87.024425  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Streltsov, S. V.;Petrova, M. V.;Morozov, V. A.;Romanenko, G. V.;Anisimov, V. I.;Lukzen, N. N.;
7:5:44:5     Theoretical prediction of Jahn-Teller distortions and orbital ordering in Cs2CuCl2Br2
DOI:10.1103/PhysRevB.86.035109  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Streltsov, S. V.;Khomskii, D. I.;
7:5:44:6     Jahn-Teller distortion and charge, orbital, and magnetic order in NaMn7O12
DOI:10.1103/PhysRevB.89.201115  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Streltsov, Sergey V.;Khomskii, Daniel I.;
7:5:44:7     Electronic properties of pyroxenes NaCrSi2O6 and NaFeSi2O6
DOI:10.1103/PhysRevB.81.045118  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Streltsov, S. V.;McLeod, J.;Moewes, A.;Redhammer, G. J.;Kurmaev, E. Z.;
7:5:44:8     Polymorphism and Multiferroicity in Bi1-x/3(Mn-3(III))((Mn4-xMnxIV)-Mn-III)O-12
DOI:10.1021/cm200879p  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:3  AU: Mezzadri, Francesco;Buzzi, Michele;Pernechele, Chiara;Calestani, Gianluca;Solzi, Massimo;Migliori, Andrea;Gilioli, Edmondo;
7:5:44:9     First-principles study of pressure-induced magnetic transition in siderite FeCO3
DOI:10.1016/j.jallcom.2011.08.079  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Ming, Xing;Wang, Xiao-Lan;Du, Fei;Yin, Jian-Wu;Wang, Chun-Zhong;Chen, Gang;
7:5:44:10     Structure of siderite FeCO3 to 56 GPa and hysteresis of its spin-pairing transition
DOI:10.1103/PhysRevB.82.064110  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Lavina, Barbara;Dera, Przemyslaw;Downs, Robert T.;Yang, Wenge;Sinogeikin, Stanislav;Meng, Yue;Shen, Guoyin;Schiferl, David;
7:5:44:11     Muon-spin relaxation and heat capacity measurements on the magnetoelectric and multiferroic pyroxenes LiFeSi2O6 and NaFeSi2O6
DOI:10.1103/PhysRevB.81.214403  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Baker, P. J.;Lewtas, H. J.;Blundell, S. J.;Lancaster, T.;Franke, I.;Hayes, W.;Pratt, F. L.;Bohaty, L.;Becker, P.;
7:5:44:12     Symmetry replication and toroidic effects in the multiferroic pyroxene NaFeSi2O6
DOI:10.1103/PhysRevB.81.214417  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Mettout, Bruno;Toledano, Pierre;Fiebig, Manfred;
7:5:44:13     Crystal and Magnetic Structures and Physical Properties of a New Pyroxene NaMnGe2O6 Synthesized under High Pressure
DOI:10.1021/ja312038g  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2013
  TC:2  AU: Cheng, Jinguang;Tian, Wei;Zhou, Jianshi;Lynch, Vincent M.;Steinfink, Hugo;Manthiram, Arumugam;May, Andrew F.;Garlea, Vasile O.;Neuefeind, Joerg C.;Yan, Jiaqiang;
7:5:44:14     Influence of exchange correlation on the symmetry and properties of siderite according to density-functional theory
DOI:10.1103/PhysRevB.82.205121  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Badaut, V.;Zeller, P.;Dorado, B.;Schlegel, M. L.;
7:5:44:15     High-pressure structural behaviour of Cu0.5Fe0.5Cr2S4: An experimental and theoretical study
DOI:10.1016/j.jallcom.2013.05.123  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Waskowska, A.;Gerward, L.;Olsen, J. Staun;Svane, A.;Vaitheeswaran, G.;Kanchana, V.;
7:5:44:16     Calculation of the spectral, structural, and electronic properties of NaCrSi2O6 and LiCrSi2O6 crystals
DOI:10.1016/j.optmat.2013.03.011  JN:OPTICAL MATERIALS  PY:2013
  TC:0  AU: Brik, M. G.;Avram, N. M.;Gruia, A. S.;
7:5:45:1     High magnetic field induced phases and half-magnetization plateau in the S=1 kagome compound Ni3V2O8
DOI:10.1103/PhysRevB.84.220407  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Wang, Junfeng;Tokunaga, M.;He, Z. Z.;Yamaura, J. I.;Matsuo, A.;Kindo, K.;
7:5:45:2     Magnetic-field-induced shift of the optical band gap in Ni3V2O8
DOI:10.1103/PhysRevB.89.165120  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Chen, P.;Holinsworth, B. S.;O'Neal, K. R.;Brinzari, T. V.;Mazumdar, D.;Wang, Y. Q.;McGill, S.;Cava, R. J.;Lorenz, B.;Musfeldt, J. L.;
7:5:45:3     Control of the multiferroic transition in Ni3V2O8 by transition metal doping
DOI:10.1103/PhysRevB.84.064447  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Kumarasiri, A.;Lawes, G.;
7:5:45:4     Stabilization of multiferroic spin cycloid in Ni3V2O8 by light Co doping
DOI:10.1103/PhysRevB.88.174412  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Qureshi, N.;Ressouche, E.;Mukhin, A. A.;Ivanov, V. Yu;Barilo, S. N.;Shiryaev, S. V.;Skumryev, V.;
7:5:45:5     Incommensurability and spin dynamics in the low-temperature phases of Ni3V2O8
DOI:10.1103/PhysRevB.87.214418  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Ehlers, G.;Podlesnyak, A. A.;Hahn, S. E.;Fishman, R. S.;Zaharko, O.;Frontzek, M.;Kenzelmann, M.;Pushkarev, A. V.;Shiryaev, S. V.;Barilo, S.;
7:5:45:6     Electronic structure of the kagome staircase compounds Ni3V2O8 and Co3V2O8
DOI:10.1103/PhysRevB.87.125133  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Laverock, J.;Chen, B.;Preston, A. R. H.;Smith, K. E.;Wilson, N. R.;Balakrishnan, G.;Glans, P. -A.;Guo, J. -H.;
7:5:45:7     Kagome staircase compound Co3V2O8 in an applied magnetic field: Single-crystal neutron diffraction study
DOI:10.1103/PhysRevB.82.104409  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Petrenko, O. A.;Wilson, N. R.;Balakrishnan, G.;Paul, D. Mck;McIntyre, G. J.;
7:5:45:8     Electric field control of multiferroic domains in Ni3V2O8 imaged by x-ray polarization-enhanced topography
DOI:10.1103/PhysRevB.82.024434  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Fabrizi, F.;Walker, H. C.;Paolasini, L.;de Bergevin, F.;Fennell, T.;Rogado, N.;Cava, R. J.;Wolf, Th;Kenzelmann, M.;McMorrow, D. F.;
7:5:45:9     Magnetoelastic coupling in magnetically frustrated Co3V2O8
DOI:10.1103/PhysRevB.81.012403  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Vergara, L. I.;Cao, J.;Tung, L. -C.;Rogado, N.;Yen, F.;Wang, Y. Q.;Cava, R. J.;Lorenz, B.;Wang, Y. -J.;Musfeldt, J. L.;
7:5:45:10     Magnetic order and fluctuations in the presence of quenched disorder in the kagome staircase system (Co1-xMgx)(3)V2O8
DOI:10.1103/PhysRevB.86.174421  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Fritsch, K.;Yamani, Z.;Chang, S.;Qiu, Y.;Copley, J. R. D.;Ramazanoglu, M.;Dabkowska, H. A.;Gaulin, B. D.;
7:5:45:11     Electronic Structure and Magnetic Properties of ( Co1-x TMx) 3V2O8, ( TM= Mn, Mg and Zn) Compounds
DOI:10.1080/00150193.2014.889976  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Jezierski, A.;Kaczkowski, J.;Szymczak, R.;Szymczak, H.;
7:5:45:12     Complex magnetoelastic properties in the frustrated kagome-staircase compounds (Co1-xNix)(3)V2O8
DOI:10.1103/PhysRevB.84.184429  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Zhang, Q.;Knafo, W.;Adelmann, P.;Schweiss, P.;Grube, K.;Qureshi, N.;Wolf, Th.;v. Loehneysen, H.;Meingast, C.;
7:5:45:13     V-51 NMR study of the kagome staircase compound Ni3V2O8
DOI:10.1103/PhysRevB.81.144404  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Ogloblichev, V.;Kumagai, K.;Verkhovskii, S.;Yakubovsky, A.;Mikhalev, K.;Furukawa, Yu.;Gerashenko, A.;Smolnikov, A.;Barilo, S.;Bychkov, G.;Shiryaev, S.;
7:5:45:14     Crystal growth and characterization of the magnetically dilute kagome staircase system (Co(1-x)Mgx)(3)V2O8
DOI:10.1016/j.jcrysgro.2011.05.008  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:2  AU: Fritsch, K.;Ramazanoglu, M.;Dabkowska, H. A.;Gaulin, B. D.;
7:5:46:1     Glassy magnetic phase driven by short-range charge and magnetic ordering in nanocrystalline La1/3Sr2/3FeO3-delta: Magnetization, Mossbauer, and polarized neutron studies
DOI:10.1103/PhysRevB.86.104416  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Sabyasachi, Sk.;Patra, M.;Majumdar, S.;Giri, S.;Das, S.;Amaral, V. S.;Iglesias, O.;Borghols, W.;Chatterji, T.;
7:5:46:2     Colossal magnetocapacitance near room temperature in ferromagnetic Cr2O3 film
DOI:10.1063/1.4817734  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Ghosh, A.;Dey, K.;Sabyasachi, Sk.;Karmakar, A.;Majumdar, S.;Giri, S.;
7:5:46:3     Structural correlation to magnetodielectricity and coercivity at room temperature in multiferroic Bi0.7Ba0.3-xPbxFeO3
DOI:10.1016/j.actamat.2012.10.004  JN:ACTA MATERIALIA  PY:2013
  TC:2  AU: Dey, K.;Majumdar, S.;Giri, S.;
7:5:46:4     Particle-size effects on the suppression of charge ordering in Nd0.8Na0.2MnO3
DOI:10.1063/1.3675532  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Samantaray, B.;Srivastava, S. K.;Ravi, S.;
7:5:46:5     Strain induced enhanced ferromagnetic behavior in inhomogeneous low doped La0.95Sr0.05MnO3+delta
DOI:10.1063/1.4793657  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Das, S.;Amaral, J. S.;De, K.;Willinger, M.;Goncalves, J. N.;Roy, A.;Dhak, P.;Giri, S.;Majumder, S.;Silva, C. J. R.;Gomes, M. J. M.;Mahapatra, P. K.;Amaral, V. S.;
7:5:46:6     Structural correlation to spontaneous electric and magnetic order in multiferroic LiCr0.99Fe0.01O2
DOI:10.1016/j.scriptamat.2013.11.032  JN:SCRIPTA MATERIALIA  PY:2014
  TC:2  AU: Dey, K.;Karmakar, A.;Majumdar, S.;Giri, S.;
7:5:46:7     Neutron scattering study of magnetic phase separation in nanocrystalline La5/8Ca3/8MnO3
DOI:10.1103/PhysRevB.84.144401  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Dhital, Chetan;de la Cruz, Clarina;Opeil, C.;Treat, A.;Wang, K. F.;Liu, J. -M.;Ren, Z. F.;Wilson, Stephen D.;
7:5:46:8     Origin of spin-glass and exchange bias in La1/3Sr2/3FeO3-gamma nanoparticles
DOI:10.1063/1.4868685  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: da Silva, R. B.;de Araujo, J. H.;Soares, J. M.;Machado, F. L. A.;
7:5:46:9     Constricted double loop hysteresis and exchange bias attributed to the surface anisotropy in nanocrystalline La1/3Sr2/3Fe1-xCrxO3
DOI:10.1016/j.jmmm.2013.05.023  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:0  AU: Sabyasachi, Sk.;Patra, M.;Majumdar, S.;Giri, S.;
7:5:46:10     Magnetodielectric response of square-coordinated MnO2 unit in cubic BiMn7O12
DOI:10.1063/1.3551540  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Imamura, N.;Singh, K.;Pelloquin, D.;Simon, Ch.;Sasagawa, T.;Karppinen, M.;Yamauchi, H.;Maignan, A.;
7:5:46:11     Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles
DOI:10.1103/PhysRevB.84.104427  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Silva, N. J. O.;Amaral, V. S.;Urtizberea, A.;Bustamante, R.;Millan, A.;Palacio, F.;Kampert, E.;Zeitler, U.;de Brion, S.;Iglesias, O.;Labarta, A.;
7:5:46:12     Reentrant spin glass behaviour in Nd0.84K0.12MnO3
DOI:10.1016/j.jmmm.2010.01.030  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:1  AU: Samantaray, B.;Ravi, S.;
7:5:46:13     Magnetic dynamics of charge ordered Nd0.80Na0.20MnO3 compound
DOI:10.1016/j.jmmm.2011.05.050  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:2  AU: Samantaray, B.;Srivastava, S. K.;Ravi, S.;
7:5:47:1     Chiral Domains in Cycloidal Multiferroic Thin Films: Switching and Memory Effects
DOI:10.1103/PhysRevLett.107.257601  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:8  AU: Fina, I.;Fabrega, L.;Marti, X.;Sanchez, F.;Fontcuberta, J.;
7:5:47:2     Stability of spin-driven ferroelectricity in the thin-film limit: Coupling of magnetic and electric order in multiferroic TbMnO3 films
DOI:10.1103/PhysRevB.88.054401  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Glavic, Artur;Becher, Carsten;Voigt, Joerg;Schierle, Enrico;Weschke, Eugen;Fiebig, Manfred;Brueckel, Thomas;
7:5:47:3     Phase coexistence and magnetically tuneable polarization in cycloidal multiferroics
DOI:10.1103/PhysRevB.88.100403  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Fina, I.;Skumryev, V.;O'Flynn, D.;Balakrishnan, G.;Fontcuberta, J.;
7:5:47:4     Exchange bias in multiferroic BiFeO3 and YMnO3 multilayers: One more parameter for magnetoelectric manipulation
DOI:10.1016/j.scriptamat.2011.04.016  JN:SCRIPTA MATERIALIA  PY:2011
  TC:8  AU: Cheng, Z. X.;Zhao, H. Y.;Du, Y.;Kimura, H.;Ozawa, K.;Wang, X. L.;
7:5:47:5     Strain-driven noncollinear magnetic ordering in orthorhombic epitaxial YMnO3 thin films
DOI:10.1063/1.3514575  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:13  AU: Marti, X.;Skumryev, V.;Laukhin, V.;Bachelet, R.;Ferrater, C.;Garcia-Cuenca, M. V.;Varela, M.;Sanchez, F.;Fontcuberta, J.;
7:5:47:6     Observation of large electric polarization in orthorhombic TmMnO3 thin films
DOI:10.1063/1.3524500  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Han, T. C.;Chao, H. H.;
7:5:47:7     Correlation between the mobility of domain wall and polarization flop direction in a slanted magnetic field in the helimagnetic ferroelectrics Tb1-xDyxMnO3
DOI:10.1103/PhysRevB.83.060403  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Abe, N.;Taniguchi, K.;Sagayama, H.;Umetsu, H.;Arima, T.;
7:5:47:8     Spin-helicity-dependent magnetic domain growth in a spin-driven multiferroic under applied electric field
DOI:10.1103/PhysRevB.82.064418  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Nakajima, Taro;Mitsuda, Setsuo;Takahashi, Keiichiro;Yamazaki, Hiroe;Yoshitomi, Keisuke;Soda, Minoru;Matsuura, Masato;Hirota, Kazuma;
7:5:47:9     Microstructure and strain relaxation of orthorhombic TmMnO3 epitaxial thin films
DOI:10.1016/j.jcrysgro.2011.11.031  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:1  AU: Yu, Y.;Zhang, X.;Yang, J. J.;Wang, J. W.;Zhao, Y. G.;
7:5:47:10     Stability of spin-driven ferroelectricity in the thin-film limit: Coupling of magnetic and electric order in multiferroic TbMnO3 films (vol 88, 054401, 2013)
DOI:10.1103/PhysRevB.88.059904  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Glavic, Artur;Becher, Carsten;Voigt, Joerg;Schierle, Enrico;Weschke, Eugen;Fiebig, Manfred;Brueckel, Thomas;
7:5:47:11     Multiferroic domain structure in orthorhombic multiferroics of cycloidal spin order: Phase field simulations
DOI:10.1063/1.4739426  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Chu, P.;Chen, D. P.;Liu, J. -M.;
7:5:48:1     Magnetic Phases of a Highly Frustrated Magnet, ZnCr2O4, up to an Ultrahigh Magnetic Field of 600 T
DOI:10.1103/PhysRevLett.107.207203  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:13  AU: Miyata, Atsuhiko;Ueda, Hiroaki;Ueda, Yutaka;Sawabe, Hironobu;Takeyama, Shojiro;
7:5:48:2     Interplay of spin and lattice degrees of freedom in the frustrated antiferromagnet CdCr2O4: High-field and temperature-induced anomalies of the elastic constants
DOI:10.1103/PhysRevB.83.184421  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Bhattacharjee, Subhro;Zherlitsyn, S.;Chiatti, O.;Sytcheva, A.;Wosnitza, J.;Moessner, R.;Zhitomirsky, M. E.;Lemmens, P.;Tsurkan, V.;Loidl, A.;
7:5:48:3     Magnetization plateaus of the spin-1/2 kagome antiferromagnets volborthite and vesignieite
DOI:10.1103/PhysRevB.83.180407  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Okamoto, Yoshihiko;Tokunaga, Masashi;Yoshida, Hiroyuki;Matsuo, Akira;Kindo, Koichi;Hiroi, Zenji;
7:5:48:4     Magnetic superfluid state in the frustrated spinel oxide CdCr2O4 revealed by ultrahigh magnetic fields
DOI:10.1103/PhysRevB.87.214424  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Miyata, Atsuhiko;Takeyama, Shojiro;Ueda, Hiroaki;
7:5:48:5     Magnetostructural Transitions in a Frustrated Magnet at High Fields
DOI:10.1103/PhysRevLett.106.247202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:7  AU: Tsurkan, V.;Zherlitsyn, S.;Felea, V.;Yasin, S.;Skourski, Yu.;Deisenhofer, J.;von Nidda, H. -A. Krug;Lemmens, P.;Wosnitza, J.;Loidl, A.;
7:5:48:6     Universal Magnetic Structure of the Half-Magnetization Phase in Cr-Based Spinels
DOI:10.1103/PhysRevLett.104.047201  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:10  AU: Matsuda, M.;Ohoyama, K.;Yoshii, S.;Nojiri, H.;Frings, P.;Duc, F.;Vignolle, B.;Rikken, G. L. J. A.;Regnault, L. -P.;Lee, S. -H.;Ueda, H.;Ueda, Y.;
7:5:48:7     Large change in the exchange interactions of HgCr2O4 under very high magnetic fields
DOI:10.1103/PhysRevB.83.214401  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Kimura, Shojiro;Hagiwara, Masayuki;Takeuchi, Tetsuya;Yamaguchi, Hironori;Ueda, Hiroaki;Ueda, Yutaka;Kindo, Koichi;
7:5:48:8     Magnetic field and pressure effects on magnetism of bond-frustrated ZnCr2S4
DOI:10.1016/j.jmmm.2013.03.010  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Xie, Y. M.;Yang, Z. R.;Zhang, Z. T.;Shen, C.;Li, L.;Ling, L. S.;Pi, L.;Sun, Y. P.;Zhang, Y. H.;
7:5:48:9     Chiral magnetism and helimagnons in a pyrochlore antiferromagnet
DOI:10.1103/PhysRevB.87.054418  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Choi, Eunsong;Chern, Gia-Wei;Perkins, Natalia B.;
7:5:48:10     Magnetic properties of frustrated pyrochlore fluorides Cd2M2F6S (M = Fe, Co, and Ni)
DOI:10.1103/PhysRevB.84.214411  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Ueda, Hiroaki;Numa, Shoko;Matsuo, Akira;Kindo, Koichi;Ueda, Yutaka;
7:5:49:1     The high-resolution powder diffractometer at the high flux isotope reactor
DOI:10.1007/s00339-010-5603-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:28  AU: Garlea, V. O.;Chakoumakos, B. C.;Moore, S. A.;Taylor, G. B.;Chae, T.;Maples, R. G.;Riedel, R. A.;Lynn, G. W.;Selby, D. L.;
7:5:49:2     Intralayer Cation Ordering in a Brownmillerite Superstructure: Synthesis, Crystal, and Magnetic Structures of Ca2FeCoO5
DOI:10.1021/cm1023025  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:15  AU: Ramezanipour, Farshid;Greedan, John E.;Grosvenor, Andrew P.;Britten, James F.;Cranswick, Lachlan M. D.;Garlea, V. Ovidiu;
7:5:49:3     Unexpected magnetism, Griffiths phase, and exchange bias in the mixed lanthanide Pr0.6Er0.4Al2
DOI:10.1103/PhysRevB.89.224411  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Pathak, Arjun K.;Paudyal, D.;Jayasekara, W. T.;Calder, S.;Kreyssig, A.;Goldman, A. I.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;
7:5:49:4     Complex room-temperature ferrimagnetism induced by zigzag stripes of oxygen vacancies in Sr3YCo4O10+delta
DOI:10.1103/PhysRevB.83.140403  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Khalyavin, D. D.;Chapon, L. C.;Suard, E.;Parker, J. E.;Thompson, S. P.;Yaremchenko, A. A.;Kharton, V. V.;
7:5:49:5     Structural and magnetic properties of the cobaltate series (BaSr)(4-x)La2xCo4O15
DOI:10.1103/PhysRevB.86.094434  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Garlea, V. O.;Jin, R.;Garlea, E.;Ehlers, G.;Mamontov, E.;Myers, D. B.;Xie, F.;Custelcean, R.;
7:5:49:6     Combined X-ray and neutron diffraction Rietveld refinement in iron-substituted nano-hydroxyapatite
DOI:10.1007/s10853-013-7148-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:2  AU: Kyriacou, A.;Leventouri, Th.;Chakoumakos, B. C.;Garlea, V. O.;dela Cruz, C. B.;Rondinone, A. J.;Sorge, K. D.;
7:5:49:7     mu SR study of short-range magnetic order in the paramagnetic regime of ErCo2
DOI:10.1103/PhysRevB.84.184425  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Bonilla, C. M.;Marcano, N.;Herrero-Albillos, J.;Maisuradze, A.;Garcia, L. M.;Bartolome, F.;
7:5:49:8     Complex magnetic behavior of the sawtooth Fe chains in Rb2Fe2O(AsO4)(2)
DOI:10.1103/PhysRevB.89.014426  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Garlea, V. Ovidiu;Sanjeewa, Liurukara D.;McGuire, Michael A.;Kumar, Pramod;Sulejmanovic, Dino;He, Jian;Hwu, Shiou-Jyh;
7:5:49:9     Study of the antiferromagnetism of Mn5Si3: an inverse magnetocaloric effect material
DOI:10.1039/c2jm00154c  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:4  AU: Gottschilch, Michael;Gourdon, Olivier;Persson, Joerg;de la Cruz, Clarina;Petricek, Vaclav;Brueckel, Thomas;
7:5:49:10     The effect of the B-site cation and oxygen stoichiometry on the local and average crystal and magnetic structures of Sr2Fe1.9M0.1O5+y (M = Mn, Cr, Co; y=0, 0.5)
DOI:10.1039/c2jm30957b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:1  AU: Ramezanipour, Farshid;Greedan, John E.;Cranswick, Lachlan M. D.;Garlea, V. Ovidiu;Siewenie, Joan;King, Graham;Llobet, Anna;Donaberger, Ronald L.;
7:5:49:11     Synthesis and structural characterization of Fe3+-doped calcium hydroxyapatites: role of precursors and synthesis method
DOI:10.1007/s10853-010-4834-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:3  AU: Salviulo, G.;Bettinelli, M.;Russo, U.;Speghini, A.;Nodari, L.;
7:5:49:12     Origin of the Room-Temperature Ferromagnetism in Sr3YCo4O10+delta (0.5 < delta < 1.0): Formation of Ferromagnetic Spin Bags in the Oxygen-Rich Perovskite Layers
DOI:10.1021/cm302007q  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:1  AU: Bettis, Jerry L., Jr.;Xiang, Hongjun;Whangbo, Myung-Hwan;
7:5:49:13     Short-range structure of the brownmillerite-type oxide Ba2In2O5 and its hydrated proton-conducting form BaInO3H
DOI:10.1039/c4ta03213f  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:3  AU: Bielecki, Johan;Parker, Stewart F.;Ekanayake, Dharshani;Rahman, Seikh M. H.;Borjesson, Lars;Karlsson, Maths;
7:5:49:14     Fluorine insertion reactions of the brownmillerite materials Sr2Fe2O5, Sr2CoFeO5, and Sr2Co2O5
DOI:10.1016/j.materresbull.2012.05.002  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:8  AU: Sullivan, Eirin;Greaves, Colin;
7:5:49:15     In situ powder XRD and Mossbauer study of Fe-Co supported on CaCO3
DOI:10.1016/j.materresbull.2014.04.065  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Chiwaye, N.;Jewell, L. L.;Billing, D. G.;Naidoo, D.;Ncube, M.;Coville, N. J.;
7:5:50:1     Emergence of ferromagnetism in antiferromagnetic TbMnO3 by epitaxial strain
DOI:10.1063/1.3443714  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:23  AU: Marti, X.;Skumryev, V.;Ferrater, C.;Garcia-Cuenca, M. V.;Varela, M.;Sanchez, F.;Fontcuberta, J.;
7:5:50:2     Uncompensated magnetization and exchange-bias field in La0.7Sr0.3MnO3/YMnO3 bilayers: The influence of the ferromagnetic layer
DOI:10.1016/j.jmmm.2011.06.053  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:12  AU: Zandalazini, C.;Esquinazi, P.;Bridoux, G.;Barzola-Quiquia, J.;Ohldag, H.;Arenholz, E.;
7:5:50:3     Structural, magnetic and electric properties of HoMnO3 films on SrTiO3(001)
DOI:10.1016/j.jmmm.2011.08.021  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Wunderlich, R.;Chiliotte, C.;Bridoux, G.;Maity, T.;Kocabiyik, Oe.;Setzer, A.;Ziese, M.;Esquinazi, P.;
7:5:50:4     Off-Stoichiometry Effects on the Crystalline and Defect Structure of Hexagonal Manganite REMnO3 Films (RE = V, Er, Dy)
DOI:10.1021/cm1029358  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:8  AU: Gelard, I.;Jehanathan, N.;Roussel, H.;Gariglio, S.;Lebedev, O. I.;Van Tendeloo, G.;Dubourdieu, C.;
7:5:50:5     Dielectric anomalies in orthorhombic YMnO3 thin films
DOI:10.1016/j.tsf.2009.12.065  JN:THIN SOLID FILMS  PY:2010
  TC:6  AU: Fina, I.;Marti, X.;Fabrega, L.;Sanchez, F.;Fontcuberta, J.;
7:5:50:6     Exchange bias: Dependence on the properties of the ferromagnetic interface layer
DOI:10.1103/PhysRevB.82.094432  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Usadel, K. D.;Stamps, R. L.;
7:5:50:7     Angular dependence of the magnetoelectric effect in orthorhombic HoMnO3 films
DOI:10.1103/PhysRevB.84.214424  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Ziese, M.;Setzer, A.;Wunderlich, R.;Zandalazini, C.;Esquinazi, P.;
7:5:50:8     Strain and lattice distortion in (110)-epitaxial orthorhombic TbMnO3 multiferroic thin films grown by pulsed laser deposition
DOI:10.1016/j.apsusc.2011.10.082  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:4  AU: Hu, Y.;Bator, M.;Kenzelmann, M.;Lippert, T.;Niedermayer, C.;Schneider, C. W.;Wokaun, A.;
7:5:50:9     Magnetic properties of Al doped TbMnO3 thin films grown by pulsed laser deposition
DOI:10.1063/1.4745879  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Perez-Osuna, F.;Siqueiros, J. M.;Duran, A.;Cruz, M. P.;Salamanca-Riba, L.;Heiras, J.;
7:5:50:10     Structure and defect characterization of multiferroic ReMnO3 films and multilayers by TEM
DOI:10.1088/0957-4484/21/7/075705  JN:NANOTECHNOLOGY  PY:2010
  TC:8  AU: Jehanathan, Neerushana;Lebedev, Oleg;Gelard, Isabelle;Dubourdieu, Catherine;Van Tendeloo, Gustaaf;
7:5:50:11     Spin disorder dependence of the exchange bias effect
DOI:10.1103/PhysRevB.86.020407  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Zhan, Xiaozhi;Mao, Zhongquan;Xu, Xiao;Chen, Xi;Kleemann, Wolfgang;
7:5:50:12     Ferromagnetic response of multiferroic TbMnO3 films mediated by epitaxial strain and chemical pressure
DOI:10.1063/1.4867121  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Izquierdo, J.;Astudillo, A.;Bolanos, G.;Arnache, O.;Moran, O.;
7:5:50:13     Magnetodielectric and dielectric properties of orthorhombic HoMnO3 thin films
DOI:10.1016/j.tsf.2010.07.046  JN:THIN SOLID FILMS  PY:2010
  TC:2  AU: Wang, Weitian;Zhang, Lixin;Yuan, Dehua;Sun, Yuming;
7:5:51:1     Magnetic order of the hexagonal rare-earth manganite Dy0.5Y0.5MnO3
DOI:10.1103/PhysRevB.84.064434  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Helton, Joel S.;Singh, Deepak K.;Nair, Harikrishnan S.;Elizabeth, Suja;
7:5:51:2     Mutual induction of magnetic 3d and 4f order in multiferroic hexagonal ErMnO3
DOI:10.1103/PhysRevB.86.184415  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Meier, D.;Ryll, H.;Kiefer, K.;Klemke, B.;Hoffmann, J. -U.;Ramesh, R.;Fiebig, M.;
7:5:51:3     Incompatible magnetic order in multiferroic hexagonal DyMnO3
DOI:10.1103/PhysRevB.82.100414  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Wehrenfennig, C.;Meier, D.;Lottermoser, Th.;Lonkai, Th.;Hoffmann, J-U;Aliouane, N.;Argyriou, D. N.;Fiebig, M.;
7:5:51:4     Spin reorientation and spin-flop transition in multiferroic manganites Y1-xTbxMnO3 (x=0, 0.1, 0.2) single crystals
DOI:10.1063/1.4704691  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Li, H. N.;Huang, J. W.;Xiao, L. X.;Peng, L. P.;Wu, Y. Y.;Du, G. H.;Ouyang, Z. W.;Chen, B. R.;Xia, Z. C.;
7:5:51:5     Effect of substitution of Y on the structural, magnetic, and thermal properties of hexagonal DyMnO3 single crystals
DOI:10.1103/PhysRevB.83.104424  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Nair, Harikrishnan S.;Kumar, C. M. N.;Bhat, H. L.;Elizabeth, Suja;Brueckel, Th.;
7:5:51:6     Magnetic phase competition in Dy1-xYxMnO3
DOI:10.1063/1.3671795  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Vajk, O. P.;Wang, Y.;Gunasekera, J.;Tarwater, K.;Heitmann, T.;
7:5:51:7     Single crystal growth of the hexagonal manganites R MnO3 (R = rare earth) by the optical floating-zone method
DOI:10.1016/j.jcrysgro.2013.11.028  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:2  AU: Fan, C.;Zhao, Z. Y.;Song, J. D.;Wu, J. C.;Zhang, F. B.;Sun, X. F.;
7:5:51:8     Phase diagram and dynamics in Er1-xYxMnO3
DOI:10.1063/1.3554263  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Vajk, O. P.;Gunasekera, J.;Wang, Y.;Heitmann, T.;
7:5:52:1     Structural and magnetic properties of multiferroic bulk TbMnO3
DOI:10.1016/j.matchemphys.2013.02.051  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:10  AU: Staruch, M.;Violette, D.;Jain, M.;
7:5:52:2     Ga substitution as an effective variation of Mn-Tb coupling in multiferroic TbMnO3
DOI:10.1103/PhysRevB.81.024419  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Prokhnenko, Oleksandr;Aliouane, Nadir;Feyerherm, Ralf;Dudzik, Esther;Wolter, Anja U. B.;Maljuk, Andrey;Kiefer, Klaus;Argyriou, Dimitri N.;
7:5:52:3     Structural effects of Sc doping on the multiferroic TbMnO3
DOI:10.1103/PhysRevB.81.224117  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Cuartero, Vera;Blasco, Javier;Garcia, Joaquin;Subias, Gloria;Ritter, Clemens;Alberto Rodriguez-Velamazan, J.;
7:5:52:4     Pressure-induced change in the magnetic ordering of TbMnO3
DOI:10.1103/PhysRevB.84.020408  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Makarova, O. L.;Mirebeau, I.;Kichanov, S. E.;Rodriguez-Carvajal, J.;Forget, A.;
7:5:52:5     Suppression of ferroelectricity and quantum fluctuations in Ru-doped TbMnO3
DOI:10.1007/s00339-011-6575-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:8  AU: Guo, Y. Y.;Guo, Y. J.;Zhang, N.;Lin, L.;Liu, J. -M.;
7:5:52:6     Landau model for the phase diagrams of the orthorhombic rare-earth manganites RMnO3 (R = Eu, Gd, Tb, Dy, Ho)
DOI:10.1103/PhysRevB.82.064410  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Ribeiro, J. L.;Vieira, L. G.;
7:5:52:7     Effects of Al substitution on the multiferroic properties of TbMnO3
DOI:10.1103/PhysRevB.86.104413  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Cuartero, Vera;Blasco, Javier;Alberto Rodriguez-Velamazan, J.;Garcia, Joaquin;Subias, Gloria;Ritter, Clemens;Stankiewicz, Jolanta;Canadillas-Delgado, Laura;
7:5:52:8     Role of t(2g) electrons in Mn-Tb coupling of multiferroic TbMnO3
DOI:10.1063/1.4893018  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Guo, Y. Y.;Wang, Y. L.;Liu, J. -M.;Wei, T.;
7:5:52:9     Phase relationship of the TbO1.81-Mn3O4-Fe2O3 system synthesized at 1200 degrees C
DOI:10.1016/j.jallcom.2012.12.011  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Wang, Rong;Yang, Chengxu;Fan, Min;Wu, Meimei;Wang, Chunhai;Yu, Xiaohui;Zhu, Jinlong;Zhang, Junrong;Li, Guobao;Huang, Qingzhen;Chen, Dongfeng;Jin, Tounan;Kamiyama, Takashi;Liao, Fuhui;Lin, Jianhua;
7:5:53:1     Multiferroics and Magnetoelectrics: A Comparison between Some Chromites and Cobaltites
DOI:10.1021/cm4020546  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:4  AU: Meher, K. R. S. Preethi;Martin, C.;Caignaert, V.;Damay, F.;Maignan, A.;
7:5:53:2     Magnetism of layered chromium sulfides MCrS2 (M = Li, Na, K, Ag, and Au): A first-principles study
DOI:10.1103/PhysRevB.87.014418  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Ushakov, A. V.;Kukusta, D. A.;Yaresko, A. N.;Khomskii, D. I.;
7:5:53:3     Magnetoelastic coupling and unconventional magnetic ordering in the multiferroic triangular lattice AgCrS2
DOI:10.1103/PhysRevB.83.184413  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Damay, F.;Martin, C.;Hardy, V.;Andre, G.;Petit, S.;Maignan, A.;
7:5:53:4     Spin dynamics in the unconventional multiferroic AgCrS2
DOI:10.1103/PhysRevB.87.134413  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Damay, F.;Petit, S.;Braendlein, M.;Rols, S.;Ollivier, J.;Martin, C.;Maignan, A.;
7:5:53:5     Suppression of geometric frustration by magnetoelastic coupling in AuCrS2
DOI:10.1103/PhysRevB.84.094455  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Carlsson, S. J. E.;Rousse, G.;Yamada, I.;Kuriki, H.;Takahashi, R.;Levy-Bertrand, F.;Giriat, G.;Gauzzi, A.;
7:5:53:6     The Dice-Stone Der Wurfelstein: Some Personal Souvenirs Around the Discovery of the First Ferromagnetic Ferroelectric
DOI:10.1080/00150193.2012.673896  JN:FERROELECTRICS  PY:2012
  TC:6  AU: Schmid, Hans;
7:5:53:7     Unified calculations of the optical band positions and EPR g factors for NaCrS2 crystal
DOI:10.1010/j.jmmm.2014.01.080  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Mei, Yang;Zheng, Wen-Chen;Zhang, Lin;
7:5:54:1     Ion-Beam Etching on Nanostructured La2Ti2O7 Piezoelectric Thin Films
DOI:10.1111/jace.12626  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Ferri, Anthony;Saitzek, Sebastien;Shao, Zhenmian;Declercq, Gaetan;Costecalde, Jean;Remiens, Denis;Deresmes, Dominique;Troadec, David;Desfeux, Rachel;
7:5:54:2     Enhancement of ferroelectricity in Cr-doped Ho2Ti2O7
DOI:10.1063/1.3455100  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Dong, X. W.;Dong, S.;Wang, K. F.;Wan, J. G.;Liu, J. -M.;
7:5:54:3     Ferroelectricity in La2Zr2O7 thin films with a frustrated pyrochlore-type structure
DOI:10.1039/c4tc00207e  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:2  AU: Saitzek, Sebastien;Shao, Zhenmian;Bayart, Alexandre;Ferri, Anthony;Huve, Marielle;Roussel, Pascal;Desfeux, Rachel;
7:5:54:4     Microstructure and Nanoscale Piezoelectric/Ferroelectric Properties in La2Ti2O7 Thin Films Grown on (110)-Oriented Doped Nb:SrTiO3 Substrates
DOI:10.1002/adem.201100105  JN:ADVANCED ENGINEERING MATERIALS  PY:2011
  TC:8  AU: Shao, Zhenmian;Saitzek, Sebastien;Roussel, Pascal;Ferri, Anthony;Bruyer, Emilie;Sayede, Adlane;Rguiti, Mohamed;Mentre, Olivier;Desfeux, Rachel;
7:5:54:5     Multiferroicity in spin ice Ho2Ti2O7: An investigation on single crystals
DOI:10.1063/1.4793704  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Liu, D.;Lin, L.;Liu, M. F.;Yan, Z. B.;Dong, S.;Liu, J. -M.;
7:5:54:6     Evidence of ferroelectricity in metastable Sm2Ti2O7 thin film
DOI:10.1039/c2jm16261j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:7  AU: Shao, ZhenMian;Saitzek, Sebastien;Ferri, Anthony;Rguiti, Mohamed;Dupont, Loic;Roussel, Pascal;Desfeux, Rachel;
7:5:54:7     Stability limit of the layered-perovskite structure in Ln(2)Ti(2)O(7) (Ln = lanthanide) thin films grown on (110)-oriented SrTiO3 substrates by the sol-gel route
DOI:10.1039/c2jm34729f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:2  AU: Shao, Zhenmian;Saitzek, Sebastien;Roussel, Pascal;Desfeux, Rachel;
7:5:54:8     Emergent order in the spin-frustrated system DyxTb2-xTi2O7 studied by ac susceptibility measurements
DOI:10.1103/PhysRevB.81.134426  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Xing, Hui;He, Mi;Feng, Chunmu;Guo, Hanjie;Zeng, Hao;Xu, Zhu-An;
7:5:54:9     Thickness effect on nanoscale electromechanical activity in Pb(Mg1/3Nb2/3)O-3-PbTiO3 thin films studied by piezoresponse force microscopy
DOI:10.1063/1.3660526  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Ferri, A.;Detalle, M.;Blach, J. -F.;Warenghem, M.;Remiens, D.;Desfeux, R.;
7:5:54:10     Microstructure and nanoscale piezoelectric/ferroelectric properties in Ln(2)Ti(2)O(7) (Ln = La, Pr and Nd) oxide thin films grown by pulsed laser deposition
DOI:10.1016/j.tsf.2013.11.036  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Bayart, Alexandre;Saitzek, Sebastien;Ferri, Anthony;Pouhet, Raphaelle;Chambrier, Marie-Helene;Roussel, Pascal;Desfeux, Rachel;
7:5:55:1     Spin-glassy behavior and exchange bias effect of hexagonal YMnO3 nanoparticles fabricated by hydrothermal process
DOI:10.1063/1.3296323  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:20  AU: Zheng, H. W.;Liu, Y. F.;Zhang, W. Y.;Liu, S. J.;Zhang, H. R.;Wang, K. F.;
7:5:55:2     Structural transformation and charge transfer induced ferroelectricity and magnetism in annealed YMnO3
DOI:10.1063/1.3647519  JN:AIP ADVANCES  PY:2011
  TC:10  AU: Liu, Sheng-Hsu;Huang, Jung-Chun-Andrew;Qi, Xiaoding;Lin, Wei-Jui;Siao, Yu-Jhan;Lin, Chun-Rong;Chen, Jin-Ming;Tang, Mau-Tsu;Lee, Yu-Hua;Lee, Jung-Chuan;
7:5:55:3     Synthesis, annealing effect and magnetic behavior of TbMnO3 nanoparticles
DOI:10.1007/s11051-014-2501-4  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2014
  TC:0  AU: Kumar, R. Dhinesh;Subramanian, M.;Tanemura, M.;Jayavel, R.;
7:5:55:4     Mechanochemical synthesis of yttrium manganite
DOI:10.1016/j.jallcom.2012.11.031  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Pocuca-Nesic, M.;Stanojevic, Z. Marinkovic;Brankovic, Z.;Cotic, P.;Bernik, S.;Sousa Goes, M.;Marinkovic, B. A.;Varela, J. A.;Brankovic, G.;
7:5:55:5     Effect of particle size and annealing on spin and phonon behavior in TbMnO3
DOI:10.1063/1.3563571  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Das, Raja;Jaiswal, Adhish;Adyanthaya, Suguna;Poddar, Pankaj;
7:5:55:6     Low temperature hydrothermal synthesis and magnetic studies of YMnO3 nanorods
DOI:10.1016/j.matlet.2013.09.070  JN:MATERIALS LETTERS  PY:2013
  TC:4  AU: Kumar, R. Dhinesh;Jayavel, R.;
7:5:55:7     Size effect on magnetic properties of hexagonal HoMnO3 nanoparticles
DOI:10.1063/1.3556945  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Han, T. C.;Tsai, M. R.;Wei, C. Y.;
7:5:55:8     A New Ferroelectric Phase of YMnO3 Induced by Oxygen- Vacancy Ordering
DOI:10.1111/jace.12747  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Zhang, Qinghua;Guo, Sandong;Ge, Binghui;Chen, Peng;Yao, Yuan;Wang, Lijuan;Gu, Lin;Wang, Yanguo;Duan, Xiaofeng;Jin, Changqing;Liu, Banggui;Yu, Richeng;
7:5:55:9     The effect of annealing temperatures on morphologies and photoluminescence properties of terbium-doped SiCN films
DOI:10.1016/j.optmat.2010.03.001  JN:OPTICAL MATERIALS  PY:2010
  TC:4  AU: Chen, Zhiyong;Zhou, Jinyuan;Song, Xi;Xu, Xianbo;Liu, Yanxia;Song, Jie;Ma, Ziwei;Xie, Erqing;
7:5:56:1     Relaxor behavior in multiferroic BiMn2O5 ceramics
DOI:10.1063/1.3650455  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Fier, I.;Walmsley, L.;Souza, J. A.;
7:5:56:2     Revisit of the Vogel-Fulcher freezing in lead magnesium niobate relaxors
DOI:10.1063/1.3494531  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Ke, Shanming;Fan, Huiqing;Huang, Haitao;
7:5:56:3     Contribution of an extrinsic mechanism for the electrical polarization in BiMn2O5 ceramics
DOI:10.1063/1.4769752  JN:AIP ADVANCES  PY:2012
  TC:1  AU: Fier, I.;Chinaglia, D. L.;Walmsley, L.;Pereira, E. C.;Rabelo, A. C.;Freitas, R. G.;
7:5:56:4     Comment on "Revisit of the Vogel-Fulcher freezing in lead magnesium niobate relaxors" [Appl. Phys. Lett. 97, 132905, (2010)]
DOI:10.1063/1.3534789  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Macutkevic, J.;Banys, J.;Grigalaitis, R.;
7:5:56:5     Dielectric relaxations and magnetodielectric response in BiMn2O5 single crystal
DOI:10.1063/1.4824928  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Yin, L. H.;Yuan, B.;Chen, J.;Zhang, D. M.;Zhang, Q. L.;Yang, J.;Dai, J. M.;Song, W. H.;Sun, Y. P.;
7:5:56:6     Effect of Eu substitution on the crystallographic and magnetic properties of the BiMn2O5 oxide obtained by urea combustion
DOI:10.1016/j.ceramint.2014.05.091  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Ferreira, Rafael A.;dos Santos, Maria Elenice;Morilla-Santos, Cassio;Lebullenger, Ronan;Pena, Octavio;Lisboa-Filho, Paulo Noronha;
7:5:56:7     Dielectric relaxation of Sr1-1.5xBixTiO3 sol-gel thin films
DOI:10.1063/1.3549612  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Okhay, Olena;Wu, Aiying;Vilarinho, Paula M.;Tkach, Alexander;
7:5:56:8     Low-temperature dielectric behavior of BiFeO3-modified CaTiO3 incipient ferroelectric ceramics
DOI:10.1063/1.4729080  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Wang, Qing Qing;Zhao, Hong Jian;Chen, Xiang Ming;
7:5:56:9     First-principles study of the magnetic stability and the exchange couplings of LaMn2O5
DOI:10.1063/1.4826263  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: El Hallani, F.;Naji, S.;Ez-Zahraouy, H.;Benyoussef, A.;
7:5:56:10     Origin of the multiferroicity in BiMn2O5 from first-principles calculations
DOI:10.1016/j.jmmm.2010.12.040  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:3  AU: Zhang, J.;Xu, B.;Li, X. F.;Yao, K. L.;Liu, Z. L.;
7:5:56:11     Effect of NaNbO3 substitution on the quantum paraelectric behavior of CaTiO3
DOI:10.1103/PhysRevB.81.212101  JN:PHYSICAL REVIEW B  PY:2010
  TC:1  AU: Tripathi, Saurabh;Kumar, Anil;Waghmare, Umesh V.;Pandey, Dhananjai;
7:5:56:12     Magnetic properties of pure and Eu-doped hematite nanoparticles
DOI:10.1007/s11051-013-2118-z  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:1  AU: Allia, P.;Barrera, G.;Bonelli, B.;Freyria, F. S.;Tiberto, P.;
7:5:57:1     Electrical transport in charge-ordered Fe2OBO3: Resistive switching and pressure effects
DOI:10.1103/PhysRevB.82.165106  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Akrap, Ana;Angst, Manuel;Khalifah, Peter;Mandrus, David;Sales, Brian C.;Forro, Laszlo;
7:5:57:2     Charge-ordering transition and incommensurate antiphase structure of Fe2BO4 as seen via transmission electron microscopy
DOI:10.1103/PhysRevB.81.020101  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Song, Y. J.;Yang, H. X.;Tian, H. F.;Ma, C.;Qin, Y. B.;Zeng, L. J.;Shi, H. L.;Lu, J. B.;Li, J. Q.;
7:5:57:3     Polar Nanodomains and Giant Converse Magnetoelectric Effect in Charge-Ordered Fe2OBO3
DOI:10.1103/PhysRevLett.106.016406  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:5  AU: Yang, H. X.;Tian, H. F.;Song, Y. J.;Qin, Y. B.;Zhao, Y. G.;Ma, C.;Li, J. Q.;
7:5:57:4     Charge ordered state and structural distortions in Fe2OBO3
DOI:10.1103/PhysRevB.86.045111  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Chen, Z.;Ma, C.;Song, Y. J.;Yang, H. X.;Tian, H. F.;Li, J. Q.;
7:5:57:5     Pressure-induced suppression of charge order and nanosecond valence dynamics in Fe2OBO3
DOI:10.1103/PhysRevB.86.195134  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Hearne, G. R.;Sibanda, W. N.;Carleschi, E.;Pischedda, V.;Attfield, J. P.;
7:5:57:6     Strong nonlinear current-voltage behaviour in iron oxyborate
DOI:10.1063/1.4901177  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Song, Yuanjun;Xu, Yingying;Song, Yujun;Li, Jianqi;Wang, Rongming;
7:5:57:7     Symmetry and charge order in Fe2OBO3 studied through polarized resonant x-ray diffraction
DOI:10.1103/PhysRevB.82.115110  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Bland, S. R.;Angst, M.;Adiga, S.;Scagnoli, V.;Johnson, R. D.;Herrero-Martin, J.;Hatton, P. D.;
7:5:57:8     Wigner-Mott insulator-to-insulator transition at pressure in charge-ordered Fe2OBO3
DOI:10.1103/PhysRevB.89.035132  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Diguet, G.;Hearne, G. R.;Sibanda, W. N.;Carleschi, E.;Musyimi, P.;Pischedda, V.;Attfield, J. P.;
7:5:58:1     Cross-Control of Magnetization and Polarization by Electric and Magnetic Fields with Competing Multiferroic and Weak-Ferromagnetic Phases
DOI:10.1103/PhysRevLett.105.097201  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:36  AU: Choi, Y. J.;Zhang, C. L.;Lee, N.;Cheong, S-W;
7:5:58:2     Exchange bias effect in multiferroic Eu0.75Y0.25MnO3
DOI:10.1016/j.jmmm.2012.03.054  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Yan, Li-Qin;Wang, Fen;Zhao, Yuelei;Zou, Tao;Shen, Jun;Sun, Young;
7:5:58:3     Orbital degrees of freedom as origin of magnetoelectric coupling in magnetite
DOI:10.1103/PhysRevB.85.085131  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Yamauchi, Kunihiko;Picozzi, Silvia;
7:5:58:4     Exchange bias effect in Tb0.4Dy0.6MnO3
DOI:10.1016/j.jmmm.2013.03.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:0  AU: Xu, M. H.;Wang, Z. H.;Zhang, D. W.;Du, Y. W.;
7:5:58:5     Interplay between Charge Order, Ferroelectricity, and Ferroelasticity: Tungsten Bronze Structures as a Playground for Multiferroicity
DOI:10.1103/PhysRevLett.105.107202  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:12  AU: Yamauchi, Kunihiko;Picozzi, Silvia;
7:5:58:6     Charge-orbital ordering and ferroelectric polarization in multiferroic TbMn2O5 from first principles
DOI:10.1103/PhysRevB.84.024421  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Chang, Tay-Rong;Jeng, Horng-Tay;Ren, Chung-Yuan;Hsue, Chen-Shiung;
7:5:59:1     Universal Exchange-Driven Phonon Splitting in Antiferromagnets
DOI:10.1103/PhysRevLett.108.177203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:9  AU: Kant, Ch;Schmidt, M.;Wang, Zhe;Mayr, F.;Tsurkan, V.;Deisenhofer, J.;Loidl, A.;
7:5:59:2     Sensitivity of the magnetic properties of the ZnCr2O4 and MgCr2O4 spinels to nonstoichiometry
DOI:10.1103/PhysRevB.83.064407  JN:PHYSICAL REVIEW B  PY:2011
  TC:13  AU: Dutton, S. E.;Huang, Q.;Tchernyshyov, O.;Broholm, C. L.;Cava, R. J.;
7:5:59:3     Spin-lattice coupling in the frustrated antiferromagnet ZnCr2Se4 probed by ultrasound
DOI:10.1103/PhysRevB.86.104420  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Felea, V.;Yasin, S.;Guenther, A.;Deisenhofer, J.;von Nidda, H. -A. Krug;Zherlitsyn, S.;Tsurkan, V.;Lemmens, P.;Wosnitza, J.;Loidl, A.;
7:5:59:4     Evolution of the optical properties of chromium spinels CdCr2O4, HgCr2S4, and ZnCr2Se4 under high pressure
DOI:10.1103/PhysRevB.89.125107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Rabia, K.;Baldassarre, L.;Deisenhofer, J.;Tsurkan, V.;Kuntscher, C. A.;
7:5:59:5     Effects of anisotropic charge on transverse optical phonons in NiO: Inelastic x-ray scattering spectroscopy study
DOI:10.1103/PhysRevB.81.241103  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Uchiyama, H.;Tsutsui, S.;Baron, A. Q. R.;
7:5:59:6     Potential asymmetry in antiferromagnetic 3d transition metal monoxides
DOI:10.1103/PhysRevB.85.014419  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Uchiyama, H.;
7:5:59:7     Optical floating zone crystal growth and magnetic properties of MgCr2O4
DOI:10.1016/j.jcrysgro.2013.09.005  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:1  AU: Koohpayeh, S. M.;Wen, J. -J.;Mourigal, M.;Dutton, S. E.;Cava, R. J.;Broholm, C. L.;McQueen, T. M.;
7:5:59:8     Study of negative thermal expansion in the frustrated spinel ZnCr2Se4
DOI:10.1063/1.4867217  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chen, X. L.;Yang, Z. R.;Tong, W.;Huang, Z. H.;Zhang, L.;Zhang, S. L.;Song, W. H.;Pi, L.;Sun, Y. P.;Tian, M. L.;Zhang, Y. H.;
7:5:60:1     Structural and phonon dynamical properties of perovskite manganites: (Tb, Dy, Ho)MnO3
DOI:10.1016/j.jmmm.2011.01.026  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:10  AU: Choithrani, Renu;Rao, Mala N.;Chaplot, S. L.;Gaur, N. K.;Singh, R. K.;
7:5:60:2     Interface-induced magnetic coupling in multiferroic/ferromagnetic bilayer: An ultrafast pump-probe study
DOI:10.1063/1.4870580  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: La-o-Vorakiat, C.;Tian, Y.;Wu, T.;Panagopoulos, C.;Zhu, J-X;Su, Haibin;Chia, Elbert E. M.;
7:5:60:3     Coexistence of coupled magnetic phases in epitaxial TbMnO3 films revealed by ultrafast optical spectroscopy
DOI:10.1063/1.4754294  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Qi, J.;Yan, L.;Zhou, H. D.;Zhu, J. -X.;Trugman, S. A.;Taylor, A. J.;Jia, Q. X.;Prasankumar, R. P.;
7:5:60:4     Two-component heat diffusion observed in LaMnO3 and La0.7Ca0.3MnO3
DOI:10.1103/PhysRevB.81.064434  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Bielecki, J.;Rauer, R.;Zanghellini, E.;Gunnarsson, R.;Dorr, K.;Borjesson, L.;
7:5:60:5     Measurement of Two Low-Temperature Energy Gaps in the Electronic Structure of Antiferromagnetic USb2 Using Ultrafast Optical Spectroscopy
DOI:10.1103/PhysRevLett.111.057402  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Qi, J.;Durakiewicz, T.;Trugman, S. A.;Zhu, J. -X.;Riseborough, P. S.;Baumbach, R.;Bauer, E. D.;Gofryk, K.;Meng, J. -Q.;Joyce, J. J.;Taylor, A. J.;Prasankumar, R. P.;
7:5:60:6     Coexistence of coupled magnetic phases in epitaxial TbMnO3 films revealed by ultrafast optical spectroscopy (vol 101, 122904, 2012)
DOI:10.1063/1.4821740  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Qi, J.;Yan, L.;Zhou, H. D.;Zhu, J. -X.;Trugman, S. A.;Taylor, A. J.;Jia, Q. X.;Prasankumar, R. P.;
7:5:60:7     Specific heat of Cd-doped manganites
DOI:10.1016/j.commatsci.2010.02.045  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2010
  TC:3  AU: Choithrani, Renu;Gaur, N. K.;
7:5:60:8     Influence of growth ambience and doping on the structural properties of multiferroic DyMnO3
DOI:10.1016/j.jcrysgro.2012.05.043  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:0  AU: Nair, Harikrishnan S.;Elizabeth, Suja;
7:5:61:1     Induced magnetism and magnetoelectric coupling in ferroelectric BaTiO3 by Cr-doping synthesized by a facile chemical route
DOI:10.1039/c3ta11845b  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2013
  TC:10  AU: Shah, Jyoti;Kotnala, Ravinder K.;
7:5:61:2     Multiferroicity and magnetoelectric coupling in half-doped manganite La0.5Ca0.5MnO3
DOI:10.1063/1.3485669  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Zou, Tao;Wang, Fen;Liu, Yi;Yan, Li-Qin;Sun, Young;
7:5:61:3     Room temperature magnetoelectric coupling enhancement in Mg-substituted polycrystalline GdFeO3
DOI:10.1016/j.scriptamat.2012.05.003  JN:SCRIPTA MATERIALIA  PY:2012
  TC:5  AU: Shah, Jyoti;Kotnala, Ravinder Kumar;
7:5:61:4     Anomalous dielectric constant of half-doped manganite La0.5Ca0.5MnO3
DOI:10.1016/j.jallcom.2013.03.101  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Cao, Xian-Sheng;Ji, Gao-Feng;Luo, Bing-chen;Li, Feng;
7:5:61:5     Multiferroic BaTiO3-CoFe2O4 Nano Composite Thin Films Grown by Polymer-Assisted Deposition
DOI:10.1080/10584587.2011.616416  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Yan, L. H.;Liang, W. Z.;Liu, S. H.;Huang, W.;Lin, Y.;
7:5:62:1     Atomic Layer Deposition of oriented nickel titanate (NiTiO3)
DOI:10.1016/j.apsusc.2014.05.092  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Bratvold, Jon E.;Fjellvag, Helmer;Nilsen, Ola;
7:5:62:2     Investigations on the temperature dependent electrical and magnetic properties of NiTiO3 by molten salt synthesis
DOI:10.1016/j.materresbull.2012.12.001  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:8  AU: Yuvaraj, S.;Nithya, V. D.;Fathima, K. Saiadali;Sanjeeviraja, C.;Selvan, G. Kalai;Arumugam, S.;Selvan, R. Kalai;
7:5:62:3     Fabrication and Characterization of High-k Dielectric Nickel Titanate Thin Films Using a Modified Sol-Gel Method
DOI:10.1111/j.1551-2916.2010.04037.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:15  AU: Chuang, Shiow-Huey;Hsieh, Min-Lung;Wu, Shih-Chieh;Lin, Hong-Cai;Chao, Tien-Sheng;Hou, Tuo-Hung;
7:5:62:4     Electronic, magnetic and dielectric properties of multiferroic MnTiO3
DOI:10.1557/jmr.2012.101  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:6  AU: Deng, Xiaohui;Lu, Wei;Wang, Hai;Huang, Haitao;Dai, Jiyan;
7:5:62:5     Preparation of zinc titanate nanoparticles and their photocatalytic behaviors in the photodegradation of humic acid in water
DOI:10.1016/j.ceramint.2012.01.078  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Wang, Ya-wen;Yuan, Pei-Hong;Fan, Cai-Mei;Wang, Yan;Ding, Guang-Yue;Wang, Yun-Fang;
7:5:62:6     Epitaxial growth of NiTiO3 with a distorted ilmenite structure
DOI:10.1016/j.tsf.2012.04.060  JN:THIN SOLID FILMS  PY:2012
  TC:9  AU: Varga, Tamas;Droubay, Timothy C.;Bowden, Mark E.;Nachimuthu, Ponnusamy;Shutthanandan, Vaithiyalingam;Bolin, Trudy B.;Shelton, William A.;Chambers, Scott A.;
7:5:62:7     Microstructures and Dielectric Properties of MgTiO3 Thick Film Prepared Using Aerosol Deposition Method
DOI:10.1080/00150193.2012.740284  JN:FERROELECTRICS  PY:2012
  TC:4  AU: Wu, Yu-Chuan;Wang, Sea-Fue;Teng, Li-Gia;
7:5:62:8     Dielectric and A.C Conductivity Behaviour of Flux Grown Nickel Titanate (NiTiO3) Crystal
DOI:10.1080/00150193.2011.531217  JN:FERROELECTRICS  PY:2011
  TC:5  AU: Bamzai, K. K.;Gupta, Vineeta;Kotru, P. N.;Wanklyn, B. M.;
7:5:63:1     Phonon anomalies and possible local lattice distortions in giant magnetocapacitive CdCr2S4
DOI:10.1103/PhysRevB.84.045106  JN:PHYSICAL REVIEW B  PY:2011
  TC:10  AU: Gnezdilov, V.;Lemmens, P.;Pashkevich, Yu G.;Payen, Ch;Choi, K. Y.;Hemberger, J.;Loidl, A.;Tsurkan, V.;
7:5:63:2     Multiple pressure-induced transitions in HgCr2S4
DOI:10.1063/1.4830225  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Efthimiopoulos, Ilias;Yaresko, Alexander;Tsurkan, Vladimir;Deisenhofer, Joachim;Loidl, Alois;Park, Changyong;Wang, Yuejian;
7:5:63:3     Pressurizing the HgCr2Se4 spinel at room temperature
DOI:10.1063/1.4861591  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Efthimiopoulos, Ilias;Yaresko, Alexander;Tsurkan, Vladimir;Deisenhofer, Joachim;Loidl, Alois;Park, Changyong;Wang, Yuejian;
7:5:63:4     Critical magnetic behavior of ferromagnetic CdCr2S4
DOI:10.1103/PhysRevB.88.144417  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Tsurkan, V.;Ehlers, D.;Felea, V.;von Nidda, H. -A. Krug;Loidl, A.;
7:5:63:5     Dynamic off-centering of Cr3+ ions and short-range magneto-electric clusters in CdCr2S4
DOI:10.1103/PhysRevB.86.224418  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;
7:5:63:6     Local symmetry lowering in CdMn2O4 spinel
DOI:10.1063/1.4903949  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Oliveira, G. N. P.;Teixeira, R.;Mendonca, T. M.;Silva, M. R.;Correia, J. G.;Lopes, A. M. L.;Araujo, J. P.;
7:5:63:7     Intricate relationship between pressure-induced electronic and structural transformations in FeCr2S4
DOI:10.1103/PhysRevB.84.224114  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Amiel, Y.;Rozenberg, G. Kh.;Nissim, N.;Milner, A.;Pasternak, M. P.;Hanfland, M.;Taylor, R. D.;
7:5:63:8     Intrinsic anomalous magnetic anisotropy of CdCr2S4
DOI:10.1103/PhysRevB.86.174423  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;Unusual temperature dependence of the spectral weight near the Fermi;level of NdNiO3 thin films;PHYSICAL REVIEW B;86;19;195147;10.1103/PhysRevB.86.195147;NOV 30 2012;2012;We investigate the behavior of the spectral weight near the Fermi level;of NdNiO3 thin films as a function of temperature across the;metal-to-insulator transition (MIT) by means of ultraviolet;photoelectron spectroscopy. The spectral weight was found to exhibit;thermal hysteresis, similar to that of the dc conductivity. A detailed;analysis of the temperature dependence reveals two distinct regimes of;spectral loss close to the Fermi level. The temperature evolution of one;regime is found to be independent of the MIT.;Garcia-Fernandez, Mirian/B-6018-2013; Zubko, Pavlo/B-5496-2009;Zubko, Pavlo/0000-0002-7330-3163;2;0;0;0;2;1098-0121;WOS:000311715000006;;;J;Sen, Arnab;Damle, Kedar;Moessner, R.;Vacancy-induced spin textures and their interactions in a classical spin;liquid;PHYSICAL REVIEW B;86;20;205134;10.1103/PhysRevB.86.205134;NOV 30 2012;2012;Motivated by experiments on the archetypal frustrated magnet;SrCr9pGa12-9pO19 (SCGO), we study the classical Heisenberg model on the;pyrochlore slab (kagome bilayer) lattice with site dilution x = 1 - p.;This allows us to address generic aspects of the physics of nonmagnetic;vacancies in a classical spin liquid. We explicitly demonstrate that the;pure (x = 0) system remains a spin liquid down to the lowest;temperatures, with an unusual nonmonotonic temperature dependence of the;susceptibility, which even turns diamagnetic for the apical spins;between the two kagome layers. For x > 0 but small, the low-temperature;magnetic response of the system is most naturally described in terms of;the properties of spatially extended spin textures that cloak an;"orphan" S = 3/2 Cr3+ spin in direct proximity to a pair of missing;sites belonging to the same triangular simplex. In the T -> 0 limit,;these orphan-texture complexes each carry a net magnetization that is;exactly half the magnetic moment of an individual spin of the undiluted;system. Furthermore, we demonstrate that they interact via an entropic;temperature-dependent pairwise exchange interaction J(eff) (T,(r) over;right arrow) similar to T J ((r) over right arrow root T) that has a;logarithmic form at short distances and decays exponentially beyond a;thermal correlation length xi(T) similar to 1/root T. The sign of J(eff);depends on whether the two orphan spins belong to the same kagome layer;or not. We provide a detailed analytical account of these properties;using an effective field theory approach specifically tailored for the;problem at hand. These results are in quantitative agreement with;large-scale Monte Carlo numerics.;3;1;0;0;3;1098-0121;WOS:000311715100008;;;J;Solanki, Ravindra Singh;Mishra, S. K.;Senyshyn, Anatoliy;Ishii, I.;Moriyoshi, Chikako;Suzuki, Takashi;Kuroiwa, Yoshihiro;Pandey, Dhananjai;Antiferrodistortive phase transition in pseudorhombohedral;(Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and;neutron powder diffraction study;PHYSICAL REVIEW B;86;17;174117;10.1103/PhysRevB.86.174117;NOV 30 2012;2012;The controversies about the structure of the true ground state of;pseudorhombohedral compositions of Pb(ZrxTi1-x)O-3 (PZT) are addressed;using a 6% Sr2+ substituted sample with x = 0.550. Sound velocity;measurements reveal a phase transition at T-c similar to 279 K. The;temperature dependence of full width at half maximum of (h00)(pc) peaks;and the unit cell volume also show anomalies around 279 K even though;there is no indication of any change of space group in the synchrotron;x-ray powder diffraction (SXRD) patterns. The neutron powder diffraction;patterns reveal appearance of superlattice peaks below T-c similar to;279 K, confirming the existence of an antiferrodistortive phase;transition. The Rietveld analysis of the room-temperature and;low-temperature SXRD data below T-c shows that the structure corresponds;to single monoclinic phase in the Cm space group while the analysis of;neutron powder diffraction data reveals that the structure of the;ground-state phase below T-c corresponds to the Cc space group. Our;analysis shows that the structural models for the ground-state phase;based on the R3c space group with or without the coexistence of the;room-temperature monoclinic phase in the Cm space group can be rejected.;SOLANKI, RAVINDRA /H-7221-2013; Senyshyn, Anatoliy/C-8267-2014;Senyshyn, Anatoliy/0000-0002-1473-8992;3;0;0;0;3;1098-0121;WOS:000311714600001;;;J;Steinke, N. -J.;Moore, T. A.;Mansell, R.;Bland, J. A. C.;Barnes, C. H. W.;Nonuniversal dynamic magnetization reversal in the Barkhausen-dominated;and mesofrequency regimes;PHYSICAL REVIEW B;86;18;184434;10.1103/PhysRevB.86.184434;NOV 30 2012;2012;Dynamic magnetization reversal in the mesofrequency range is studied by;ac magneto-optical Kerr effect (ac-MOKE) and ac anisotropic;magnetoresistance (ac-AMR) magnetometry in a series of epitaxial and;polycrystalline thin magnetic films. The dynamic coercive field was;found to scale as a power law with scaling exponents <= 1/2 depending on;the ferromagnetic material. In addition, there is a low sweep rate;regime in which the dynamic coercivity reaches a minimum. These findings;are explained in the context of reversal proceeding by motion of a few;domain walls (similar to 1). At dc and low field sweep rates the;reversal proceeds between local pinning sites via Barkhausen avalanches;and the overall reversal speed is strongly dependent on the field sweep;rate. At higher field sweep rates a continuous motion regime is entered;in which the reversal velocity depends linearly on the applied field;sweep rate and only an average pinning force is experienced by the wall.;The fit of the dynamic coercivity vs applied field sweep rate allows the;determination of the average nonlocal pinning field. The nonuniversal;scaling exponent can be explained using recently developed models and;introducing a field rate-dependent number of active domain walls.;Mansell, Rhodri/A-1450-2013;2;0;0;0;2;1098-0121;WOS:000311714700003;;;J;Stoffel, M.;Fagot-Revurat, Y.;Tejeda, A.;Kierren, B.;Nicolaou, A.;Le Fevre, P.;Bertran, F.;Taleb-Ibrahimi, A.;Malterre, D.;Electron-phonon coupling on strained Ge/Si(111)-(5x5) surfaces;PHYSICAL REVIEW B;86;19;195438;10.1103/PhysRevB.86.195438;NOV 30 2012;2012;We investigate the structural and electronic properties of strained;Ge/Si(111)-(5 x 5) surfaces by means of scanning tunneling microscopy;and high-resolution angle-resolved photoemission spectroscopy. The;homogeneous (5 x 5) reconstructed overlayers are characterized by three;electronic surface states, similar to the Si(111)-(7 x 7) surface. The;dispersion of the dangling bond related surface state exhibits the same;periodicity as that of the (5 x 5) reconstruction. Moreover, a careful;analysis of the shape and width of this surface state provides striking;evidence of electron-phonon coupling at low temperatures. By considering;the spectral function within a simple Debye model, we determine both the;Debye energy and the electron-phonon coupling strength. The latter value;is further confirmed by analyzing the temperature-dependent phonon;broadening of the dangling bond related surface state linewidth.;BERTRAN, Francois/B-7515-2008; Tejeda, Antonio/C-4711-2014;BERTRAN, Francois/0000-0002-2416-0514; Tejeda,;Antonio/0000-0003-0125-4603;1;0;0;0;1;1098-0121;WOS:000311715000012;;;J;Turek, I.;Kudrnovsky, J.;Carva, K.;Magnetic anisotropy energy of disordered tetragonal Fe-Co systems from;ab initio alloy theory;PHYSICAL REVIEW B;86;17;174430;10.1103/PhysRevB.86.174430;NOV 30 2012;2012;We present results of systematic fully relativistic first-principles;calculations of the uniaxial magnetic anisotropy energy (MAE) of a;disordered and partially ordered tetragonal Fe-Co alloy using the;coherent potential approximation (CPA). This alloy has recently become a;promising system for thin ferromagnetic films with a perpendicular;magnetic anisotropy. We find that existing theoretical approaches to;homogeneous random bulk Fe-Co alloys, based on a simple virtual crystal;approximation (VCA), overestimate the maximum MAE values obtained in the;CPA by a factor of 4. This pronounced difference is ascribed to the;strong disorder in the minority spin channel of real alloys, which is;neglected in the VCA and which leads to a broadening of the d-like;eigenstates at the Fermi energy and to the reduction of the MAE. The;ordered Fe-Co alloys with a maximum L1(0)-like atomic long-range order;can exhibit high values of the MAE, which, however, get dramatically;reduced by small perturbations of the perfect order.;Carva, Karel/A-3703-2008; Turek, Ilja/G-5553-2014; KUDRNOVSKY, Josef/G-5581-2014;KUDRNOVSKY, Josef/0000-0002-9968-6748;10;0;0;0;10;1098-0121;WOS:000311714600004;;;J;Uppstu, Andreas;Harju, Ari;High-field magnetoresistance revealing scattering mechanisms in graphene;PHYSICAL REVIEW B;86;20;201409;10.1103/PhysRevB.86.201409;NOV 30 2012;2012;We show that the type of charge carrier scattering significantly affects;the high-field magnetoresistance of graphene nanoribbons. This effect;has the potential to be used in identifying the scattering mechanisms in;graphene. The results also provide an explanation for the experimentally;found, intriguing differences in the behavior of the magnetoresistance;of graphene Hall bars placed on different substrates. Additionally, our;simulations indicate that the peaks in the longitudinal resistance tend;to become pinned to fractionally quantized values, as different;transport modes have very different scattering properties.;Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;1;0;0;0;1;1098-0121;WOS:000311715100004;;;J;White, Alexander J.;Sukharev, Maxim;Galperin, Michael;Molecular nanoplasmonics: Self-consistent electrodynamics in;current-carrying junctions;PHYSICAL REVIEW B;86;20;205324;10.1103/PhysRevB.86.205324;NOV 30 2012;2012;We consider a biased molecular junction subjected to an external;time-dependent electromagnetic field. We discuss local field formation;due to both surface plasmon-polariton excitations in the contacts and;the molecular response. Employing realistic parameters we demonstrate;that such self-consistent treatment is crucial for the proper;description of the junction transport characteristics.;White, Alexander/D-8754-2014;White, Alexander/0000-0002-7771-3899;3;0;0;0;3;1098-0121;WOS:000311715100010;;;J;Wierschem, Keola;Kato, Yasuyuki;Nishida, Yusuke;Batista, Cristian D.;Sengupta, Pinaki;Magnetic and nematic orderings in spin-1 antiferromagnets with;single-ion anisotropy;PHYSICAL REVIEW B;86;20;201108;10.1103/PhysRevB.86.201108;NOV 30 2012;2012;We study a spin-1 Heisenberg model with exchange interaction J, uniaxial;single-ion exchange anisotropy D, and Zeeman coupling to a magnetic;field B parallel to the symmetry axis. We compute the (D/J, B/J) quantum;phase diagram for square and simple cubic lattices by combining;analytical and quantum Monte Carlo approaches, and find a transition;between XY antiferromagnetic and ferronematic phases that spontaneously;break the U(1) symmetry of the model. In the language of bosonic gases,;this is a transition between a Bose-Einstein condensate (BEC) of single;bosons and a BEC of pairs. Our work opens up new avenues for measuring;this transition in real magnets.;8;0;0;0;8;1098-0121;WOS:000311715100001;;;J;Wu, Chien-Te;Valls, Oriol T.;Halterman, Klaus;Proximity effects in conical-ferromagnet/superconductor bilayers;PHYSICAL REVIEW B;86;18;184517;10.1103/PhysRevB.86.184517;NOV 30 2012;2012;We present a study of various aspects of proximity effects in F/S;(ferromagnet/superconductor) bilayers, where F has a spiral magnetic;texture such as that found in holmium, erbium, and other materials, and;S is a conventional s-wave superconductor. We numerically solve the;Bogoliubov-de Gennes (BdG) equations self-consistently and use the;solutions to compute physical quantities relevant to the proximity;effects in these bilayers. We obtain the relation between the;superconducting transition temperature T-c and the thicknesses d(F) of;the magnetic layer by solving the linearized BdG equations. We find that;the T-c (d(F)) curves include multiple oscillations. Moreover, the;system may be reentrant not only with d(F), as is the case when the;magnet is uniform, but also with temperature T : the superconductivity;disappears in certain ranges of d(F) or T. The T reentrance reported;here occurs when d(F) is larger than the spatial period of the conical;exchange field. We compute the condensation free energies and entropies;from the full BdG equations and find the results are in agreement with;T-c values obtained by linearization. The inhomogeneous nature of the;magnet makes it possible for all odd triplet pairing components to be;induced. We have investigated their properties and found that, as;compared to the singlet amplitude, both the m = 0 and +/- 1 triplet;components exhibit long-range penetration. For nanoscale bilayers, the;proximity lengths for both layers are also obtained. These lengths;oscillate with d(F) and they are found to be long range on both sides.;These results are shown to be consistent with recent experiments. We;also calculate the reverse proximity effect described by the;three-dimensional local magnetization, and the local density of states,;which reveals important energy-resolved signatures associated with the;proximity effects.;6;0;0;0;6;1098-0121;WOS:000311714700005;;;J;Altarelli, M.;Kurta, R. P.;Vartanyants, I. A.;X-ray cross-correlation analysis and local symmetries of disordered;systems: General theory (vol 82, 104207, 2010);PHYSICAL REVIEW B;86;17;179904;10.1103/PhysRevB.86.179904;NOV 29 2012;2012;1;0;0;0;1;1098-0121;WOS:000311693600006;;;J;Beheshtian, J.;Sadeghi, A.;Neek-Amal, M.;Michel, K. H.;Peeters, F. M.;Induced polarization and electronic properties of carbon-doped boron;nitride nanoribbons;PHYSICAL REVIEW B;86;19;195433;10.1103/PhysRevB.86.195433;NOV 29 2012;2012;The electronic properties of boron nitride nanoribbons (BNNRs) doped;with a line of carbon atoms are investigated using density functional;calculations. By replacing a line of alternating B and N atoms with;carbons, three different configurations are possible depending on the;type of the atoms which bond to the carbons. We found very different;electronic properties for these configurations: (i) the NCB arrangement;is strongly polarized with a large dipole moment having an unexpected;direction, (ii) the BCB and NCN arrangements are nonpolar with zero;dipole moment, (iii) the doping by a carbon line reduces the band gap;regardless of the local arrangement of the borons and the nitrogens;around the carbon line, and (iv) the polarization and energy gap of the;carbon-doped BNNRs can be tuned by an electric field applied parallel to;the carbon line. Similar effects were found when either an armchair or;zigzag line of carbon was introduced.;Sadeghi, Ali/D-1554-2013;8;0;0;0;8;1098-0121;WOS:000311694200006;;;J;Chi, Hang;Kim, Hyoungchul;Thomas, John C.;Su, Xianli;Stackhouse, Stephen;Kaviany, Massoud;Van der Ven, Anton;Tang, Xinfeng;Uher, Ctirad;Configuring pnicogen rings in skutterudites for low phonon conductivity;PHYSICAL REVIEW B;86;19;195209;10.1103/PhysRevB.86.195209;NOV 29 2012;2012;Dominant heat-carrying modes in skutterudites are associated with;vibrations of the pnicogen rings. Apart from filling the structural;cages with foreign species, disrupting the pnicogen ring structure by;substitutional alloying should be an effective approach to reduce;thermal conductivity. In this paper we explore alloying configurations;of pnicogen rings (Sb rings in the case of CoSb3) that yield;particularly low values of the thermal conductivity. We find that IV-VI;double substitution (replacing two Sb atoms with one atom each from the;column IV and column VI elements to achieve an average charge of two Sb;atoms) is a very effective approach. Our ab initio calculations, in;combination with a cluster expansion, have allowed us to identify stable;alloy configurations on the Sb rings. Subsequent molecular and lattice;dynamics simulations on low energy configurations establish the range of;atomic displacement parameters and values of the thermal conductivity.;Theoretical results are in good agreement with our experimental thermal;conductivity values. Combining both approaches of compensated double;substitution and filling of structural cages should be an effective way;of improving the thermoelectric figure of merit of skutterudites.;Su, Xianli/A-9685-2012; Chi, Hang/F-1537-2011; Thomas, John/A-2764-2009; Kim, Hyoungchul/F-2557-2014;Chi, Hang/0000-0002-1299-1150; Thomas, John/0000-0002-3162-0152; Kim,;Hyoungchul/0000-0003-3109-660X;8;0;0;0;8;1098-0121;WOS:000311694200003;;;J;Fortmann, C.;Niemann, C.;Glenzer, S. H.;Theory of x-ray scattering in high-pressure electrides;PHYSICAL REVIEW B;86;17;174116;10.1103/PhysRevB.86.174116;NOV 29 2012;2012;We report on a theoretical model for the calculation of x-ray scattering;from high-pressure electrides. By treating interstitial electrons as;effective anions forming a sublattice within the crystal, we explicitly;account for Bragg reflections from the sublattice as well as for;scattering interferences between the ion lattice and the anion;sublattice. The additional reflections and interferences lead to;significant modifications of the static structure factor as compared to;the pure lattices. Our results are important for accurate calculations;of material properties in the high-pressure phase and allow for direct;experimental verification of electride phases in matter at ultrahigh;pressures through angle-resolved x-ray scattering.;2;0;0;0;2;1098-0121;WOS:000311693600001;;;J;Guclu, Caner;Campione, Salvatore;Capolino, Filippo;Hyperbolic metamaterial as super absorber for scattered fields generated;at its surface;PHYSICAL REVIEW B;86;20;205130;10.1103/PhysRevB.86.205130;NOV 29 2012;2012;We show that hyperbolic metamaterials (HMs) that exhibit hyperbolic;wave-vector dispersion diagrams possess two important features related;to super absorption: The total power scattered by a nanosphere is (i);greatly enhanced when placed at the HM surface, compared to other;material surfaces, and (ii) almost totally directed into the HM. We show;that these two features are peculiar of HM interfaces, and we support;them using a spectral theory study of transverse-electric and magnetic;waves scattered by a subwavelength nanosphere. We analyze the;nanosphere's scattered power absorbed by various substrate;configurations. We also consider various nanosphere materials.;22;0;0;0;22;1098-0121;WOS:000311694300002;;;J;Hebbache, M.;Entanglement of electron spins and geometric phases in the diamond color;center coupled to the P1 center;PHYSICAL REVIEW B;86;19;195316;10.1103/PhysRevB.86.195316;NOV 29 2012;2012;Impurity spins in semiconductors are potential quantum bits.;Entanglement and topological phases are key resources in quantum;computation. We prove that the coupled electron spins carried by a;diamond nitrogen-vacancy color center (NV-) and a single substitutional;nitrogen impurity (P1 center) are entangled in the immediate vicinity of;the level anticrossing that appears in the Zeeman energy diagram at;about 500 G. We also determine the Aharonov-Anandan, Berry, and marginal;geometric phases that can be accumulated by the state vectors of this;spin system when it is magnetically transported around a closed path. At;the resonance where the gap between two energy levels is minimum, the;geometric phases undergo discontinuities, and the entanglement of the;two electron spins is maximal.;2;0;0;0;2;1098-0121;WOS:000311694200004;;;J;Kerdsongpanya, Sit;Alling, Bjorn;Eklund, Per;Effect of point defects on the electronic density of states of ScN;studied by first-principles calculations and implications for;thermoelectric properties;PHYSICAL REVIEW B;86;19;195140;10.1103/PhysRevB.86.195140;NOV 29 2012;2012;We have investigated the effect of defects and impurities on the;electronic density of states of scandium nitride using first-principles;calculations with the generalized gradient approximation and hybrid;functionals for the exchange correlation energy. Our results show that;Sc and N vacancies can introduce asymmetric peaks in the density of;states close to the Fermi level. We also find that the N vacancy states;are sensitive to total electron concentration of the system due to their;possibility for spin polarization. Substitutional point defects shift;the Fermi level in the electronic band according to their valence but do;not introduce sharp features. The energetics and electronic structure of;defect pairs are also studied. By using hybrid functional calculations,;a correct description of the band gap of scandium nitride is obtained.;Our results envisage ways for improving the thermoelectric figure of;merit of ScN by electronic structure engineering through stoichiometry;tuning and doping.;Eklund, Per/B-7677-2011; Alling, Bjorn/I-3193-2012;Eklund, Per/0000-0003-1785-0864; Alling, Bjorn/0000-0001-5863-5605;8;0;0;0;8;1098-0121;WOS:000311694200001;;;J;Kim, Jiseok;Fischetti, Massimo V.;Aboud, Shela;Structural, electronic, and transport properties of silicane nanoribbons;PHYSICAL REVIEW B;86;20;205323;10.1103/PhysRevB.86.205323;NOV 29 2012;2012;Silicane ribbons do not suffer from aromatic dependence of the band gap;making them a more promising candidate for near-term nanoelectronic;application compared to armchair graphene nanoribbons. The structural,;electronic, and transport properties of free-standing sp(3)-hybridized;armchair- and zigzag-edge silicane nanoribbons have been investigated;using ab initio and nonlocal empirical pseudopotential calculations.;Under ambient conditions, two-dimensional silicane sheets will;spontaneously break into stable one-dimensional ribbons similar to;density functional theory studies of graphene ribbons. The calculated;low-field electron mobility and ballistic conductance show a strong edge;dependence, due to differences in the effective mass and momentum;relaxation rates along the two transport directions. The mobility in;zigzag-edge ribbons is found to be approximately twenty times higher;than in armchair-edge ribbons.;7;0;0;0;7;1098-0121;WOS:000311694300004;;;J;Kim, Kyou-Hyun;Payne, David A.;Zuo, Jian-Min;Symmetry of piezoelectric (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (x=0.31);single crystal at different length scales in the morphotropic phase;boundary region;PHYSICAL REVIEW B;86;18;184113;10.1103/PhysRevB.86.184113;NOV 29 2012;2012;We use probes of three different length scales to examine symmetry of (1;- x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) single crystals in the;morphotropic phase boundary (MPB) region at composition x = 0.31;(PMN-31% PT). On the macroscopic scale, x-ray diffraction (XRD) shows a;mixture of strong and weak diffraction peaks of different widths. The;closest match to XRD peak data is made with monoclinic Pm (M-C);symmetry. On the local scale of a few nanometers, convergent beam;electron diffraction (CBED) studies, with a 1.6-nm electron probe,;reveal no obvious symmetry. These CBED experimental patterns can be;approximately matched with simulations based on monoclinic symmetry,;which suggests locally distorted monoclinic structure. A monoclinic Cm;(M-A or M-B)-like symmetry could also be obtained from certain regions;of the crystal by using a larger electron probe size of several tens of;nanometers in diameter. Thus the monoclinic symmetry of single crystal;PMN-31% PT is developed only in parts of the crystal by averaging over;locally distorted structure on the scale of few tens of nanometers. The;macroscopic symmetry observed by XRD is a result of averaging from the;local structure in PMN-31% PT single crystal. The lack of local symmetry;at a few nanometers scale suggests that the polarization switching;results from a change in local displacements, which are not restricted;to specific symmetry planes or directions.;2;0;0;0;2;1098-0121;WOS:000311693900002;;;J;Kossacki, P.;Faugeras, C.;Kuehne, M.;Orlita, M.;Mahmood, A.;Dujardin, E.;Nair, R. R.;Geim, A. K.;Potemski, M.;Circular dichroism of magnetophonon resonance in doped graphene;PHYSICAL REVIEW B;86;20;205431;10.1103/PhysRevB.86.205431;NOV 29 2012;2012;The polarization-resolved Raman-scattering response due to E-2g phonons;in monolayer graphene has been investigated in magnetic fields up to 29;T. The hybridization of the E-2g phonon is only observed with the;fundamental inter-Landau-level excitation (involving the n = 0 Landau;level) and in just one of the two configurations of the circularly;cross-polarized excitation and scattered light. This polarization;anisotropy of the magnetophonon resonance is shown to be inherent to;relatively strongly doped graphene samples with carrier concentrations;typical for graphene deposited on Si/SiO2 substrates.;Dujardin, Erik/A-2748-2010; Raveendran Nair, Rahul/G-5839-2010; Orlita, Milan/H-1130-2014;Dujardin, Erik/0000-0001-7242-9250;;3;0;0;0;3;1098-0121;WOS:000311694300005;;;J;Kostylev, M.;Stashkevich, A. A.;Roussigne, Y.;Grigoryeva, N. A.;Mistonov, A. A.;Menzel, D.;Sapoletova, N. A.;Napolskii, K. S.;Eliseev, A. A.;Lukashin, A. V.;Grigoriev, S. V.;Samarin, S. N.;Microwave properties of Ni-based ferromagnetic inverse opals;PHYSICAL REVIEW B;86;18;184431;10.1103/PhysRevB.86.184431;NOV 29 2012;2012;Investigations of microwave properties of Ni-based inverse ferromagnetic;opal-like film with the [111] axis of the fcc structure along the normal;direction to the film have been carried out in the 2-18 GHz frequency;band. We observed multiple spin wave resonances for the magnetic field;applied perpendicular to the film, i.e., along the [111] axis of this;artificial crystal. For the field applied in the film plane, a broad;band of microwave absorption is observed, which does not contain a fine;structure. The field ranges of the responses observed are quite;different for these two magnetization directions. This suggests a;collective magnetic ground state or shape anisotropy and collective;microwave dynamics for this foam-like material. This result is in;agreement with SQUID measurements of hysteresis loops for the material.;Two different models for this collective behavior are suggested that;satisfactorily explain the major experimental results.;Lukashin, Alexey/F-6746-2013; Mistonov, Alexander/H-2098-2013; Grigoryeva, Natalia/K-2253-2013; Kostylev, Mikhail/H-5214-2014;Mistonov, Alexander/0000-0003-0138-3579; Grigoryeva,;Natalia/0000-0002-9910-6192;;1;0;0;0;1;1098-0121;WOS:000311693900004;;;J;Kvashnin, Y. O.;Khmelevskyi, S.;Kudrnovsky, J.;Yaresko, A. N.;Genovese, L.;Bruno, P.;Noncollinear magnetic ordering in compressed FePd3 ordered alloy: A;first principles study;PHYSICAL REVIEW B;86;17;174429;10.1103/PhysRevB.86.174429;NOV 29 2012;2012;By means of ab initio calculations based on the density functional;theory we investigated the magnetic phase diagram of ordered FePd3 alloy;as a function of external pressure. Considering several magnetic;configurations we concluded that the system under pressure has a;tendency toward noncollinear spin alignment. Analysis of the Heisenberg;exchange parameters J(ij) revealed strong dependence of iron-iron;magnetic couplings on polarization of Pd atoms. To take into account;that effect we built an extended Heisenberg model with higher order;(biquadratic) terms. Minimizing the energy of this Hamiltonian, fully;parametrized using the results of ab initio calculations, we found a;candidate for a ground state of compressed FePd3, which can be seen as;two interpenetrating "triple-Q" phases.;Genovese, Luigi/C-5937-2011; Bruno, Patrick/C-9159-2009; KUDRNOVSKY, Josef/G-5581-2014;Genovese, Luigi/0000-0003-1747-0247; Bruno, Patrick/0000-0002-2574-1943;;KUDRNOVSKY, Josef/0000-0002-9968-6748;1;0;0;0;1;1098-0121;WOS:000311693600004;;;J;Li, Wu;Lindsay, L.;Broido, D. A.;Stewart, Derek A.;Mingo, Natalio;Thermal conductivity of bulk and nanowire Mg2SixSn1-x alloys from first;principles;PHYSICAL REVIEW B;86;17;174307;10.1103/PhysRevB.86.174307;NOV 29 2012;2012;The lattice thermal conductivity (kappa) of the thermoelectric;materials, Mg2Si, Mg2Sn, and their alloys, are calculated for bulk and;nanowires, without adjustable parameters. We find good agreement with;bulk experimental results. For large nanowire diameters, size effects;are stronger for the alloy than for the pure compounds. For example, in;200 nm diameter nanowires kappa is lower than its bulk value by 30%,;20%, and 20% for Mg2Si0.6Sn0.4, Mg2Si, and Mg2Sn, respectively. For;nanowires less than 20 nm thick, the relative decrease surpasses 50%,;and it becomes larger in the pure compounds than in the alloy. At room;temperature, kappa of Mg2SixSn1-x is less sensitive to nanostructuring;size effects than SixGe1-x, but more sensitive than PbTexSe1-x. This;suggests that further improvement of Mg2SixSn1-x as a nontoxic;thermoelectric may be possible.;Lindsay, Lucas/C-9221-2012; Stewart, Derek/B-6115-2008;25;1;0;0;25;1098-0121;WOS:000311693600002;;;J;Niklasson, Anders M. N.;Cawkwell, Marc J.;Fast method for quantum mechanical molecular dynamics;PHYSICAL REVIEW B;86;17;174308;10.1103/PhysRevB.86.174308;NOV 29 2012;2012;As the processing power available for scientific computing grows,;first-principles Born-Oppenheimer molecular dynamics simulations are;becoming increasingly popular for the study of a wide range of problems;in materials science, chemistry, and biology. Nevertheless, the;computational cost of Born-Oppenheimer molecular dynamics still remains;prohibitively large for many potential applications. Here we show how to;avoid a major computational bottleneck: the self-consistent-field;optimization prior to force calculations. The optimization-free quantum;mechanical molecular dynamics method gives trajectories that are almost;indistinguishable from an "exact" microcanonical Born-Oppenheimer;molecular dynamics simulation even when low-prefactor linear scaling;sparse matrix algebra is used. Our findings show that the computational;gap between classical and quantum mechanical molecular dynamics;simulations can be significantly reduced.;4;0;0;0;4;1098-0121;WOS:000311693600003;;;J;Ong, Zhun-Yong;Fischetti, Massimo V.;Theory of interfacial plasmon-phonon scattering in supported graphene;(vol 86, 165422, 2012);PHYSICAL REVIEW B;86;19;199904;10.1103/PhysRevB.86.199904;NOV 29 2012;2012;Ong, Zhun-Yong/B-9486-2013;Ong, Zhun-Yong/0000-0003-2668-6453;6;0;0;0;6;1098-0121;WOS:000311694200007;;;J;Per, Manolo C.;Snook, Ian K.;Russo, Salvy P.;Efficient calculation of unbiased expectation values in diffusion;quantum Monte Carlo;PHYSICAL REVIEW B;86;20;201107;10.1103/PhysRevB.86.201107;NOV 29 2012;2012;Despite the proven utility of quantum Monte Carlo methods in addressing;the quantum many-body problem, many important observables are difficult;to calculate due to the presence of large, and sometimes divergent,;statistical errors. The present state of the art allows the construction;of renormalized estimators which result in finite variances, but which;invariably include some systematic bias. We present a simple method for;calculating unbiased expectation values of local operators in the;diffusion quantum Monte Carlo method which is applicable to both bare;and renormalized estimators, allowing the accurate calculation of;important properties such as forces.;snook, ian/A-3427-2009; Per, Manolo/C-3680-2011;1;0;0;0;1;1098-0121;WOS:000311694300001;;;J;Simonson, J. W.;Smith, G. J.;Post, K.;Pezzoli, M.;Kistner-Morris, J. J.;McNally, D. E.;Hassinger, J. E.;Nelson, C. S.;Kotliar, G.;Basov, D. N.;Aronson, M. C.;Magnetic and structural phase diagram of CaMn2Sb2;PHYSICAL REVIEW B;86;18;184430;10.1103/PhysRevB.86.184430;NOV 29 2012;2012;On the basis of magnetic, transport, and optical measurements performed;on single crystals, we report CaMn2Sb2 to be an antiferromagnetic;insulator that exhibits weak ferromagnetic order above the Neel;temperature. Magnetic susceptibility measurements reveal the magnitude;of the high-temperature Curie-Weiss moment to be only half as large as;the ground-state ordered moment, while electronic-structure calculations;based on crystallographic measurements suggest a crystal-field-induced;spin-state transition does not occur. The antiferromagnetic state is;relatively insensitive to both doping and modest pressures, while the;ferromagnetism can be readily tuned by either. Infrared transmission and;pressure-dependent resistivity measurements suggest proximity to an;electronic delocalization transition. We suggest the ferromagnetic state;may be the signature of magnetic polarons.;1;1;0;0;1;1098-0121;WOS:000311693900003;;;J;Stishov, Sergei M.;Petrova, Alla E.;Sidorov, Vladimir A.;Menzel, Dirk;Self-doping effects in cobalt silicide CoSi: Electrical, magnetic,;elastic, and thermodynamic properties (vol 86, 064433, 2012);PHYSICAL REVIEW B;86;17;179903;10.1103/PhysRevB.86.179903;NOV 29 2012;2012;0;0;0;0;0;1098-0121;WOS:000311693600005;;;J;Thede, M.;Xiao, F.;Baines, Ch.;Landee, C.;Morenzoni, E.;Zheludev, A.;Ordering in weakly coupled random singlet spin chains;PHYSICAL REVIEW B;86;18;180407;10.1103/PhysRevB.86.180407;NOV 29 2012;2012;The influence of bond randomness on long-range magnetic ordering in the;weakly coupled S = 1/2 antiferromagnetic spin chain materials;Cu(py)(2)(Cl1-xBrx)(2) is studied by muon spin rotation and bulk;measurements. Disorder is found to have a strong effect on the ordering;temperature T-N, and an even stronger one on the saturation;magnetization m(0), but considerably more so in the effectively;lower-dimensional Br-rich materials. The observed behavior is attributed;to random singlet ground states of individual spin chains, but remains;in contradiction with chain mean-field theory [Joshi and Yang, Phys.;Rev. B 67, 174403 (2003)] predictions. In this context, we discuss the;possibility of a universal distribution of ordered moments in the weakly;coupled random singlet chains model.;Thede, Matthias/L-2975-2013;4;0;0;0;4;1098-0121;WOS:000311693900001;;;J;Usov, V.;Stoyanov, S.;Coileain, C. O.;Toktarbaiuly, O.;Shvets, I. V.;Antiband instability on vicinal Si(111) under the condition of;diffusion-limited sublimation;PHYSICAL REVIEW B;86;19;195317;10.1103/PhysRevB.86.195317;NOV 29 2012;2012;In this paper, we investigate the antiband instability on vicinal;Si(111) surfaces with different angles of misorientation. It is known;that prolonged direct current-annealing of Si(111) results in the;formation of antibands; i.e., the step bunches with the opposite slope;to the primary bunches. We provide a theoretical description of antiband;formation via the evolution of the atomic steps' shape. We also derive a;criterion for the onset of the antiband instability under the conditions;of sublimation controlled by slow adatom surface diffusion. We examine;this criterion experimentally by studying the initial stage of the;antiband formation at a constant temperature of 1270 degrees C while;systematically varying the applied electromigration field. The;experiment strongly supports the validity of the derived theoretical;criterion and indicates the importance of accounting for the factor of;critical field in the theoretical modeling of step bunching or antiband;instabilities. Deduced from the comparison of theory and experiment, the;Si surface atoms' effective charge cannot exceed double the elementary;charge, set by the lower limit of kinetic characteristic length d(s) =;0.3 nm. Using d(s) = 1.7 - 4.5 nm draws values of the effective charge;in line with the values reported in earlier studies.;Shvets, Igor/J-8710-2013;0;0;0;0;0;1098-0121;WOS:000311694200005;;;J;Weber, Cedric;Mila, Frederic;Anticollinear magnetic order induced by impurities in the frustrated;Heisenberg model of pnictides;PHYSICAL REVIEW B;86;18;184432;10.1103/PhysRevB.86.184432;NOV 29 2012;2012;We present Monte Carlo simulations for a classical antiferromagnetic;Heisenberg model with both nearest (J(1)) and next-nearest (J(2));exchange couplings on the square lattice in the presence of nonmagnetic;impurities. We show that the order-by-disorder entropy selection,;associated with the Ising-like phase transition that appears for;J(2)/J(1) > 1/2 in the pure spin model, is quenched at low temperature;due to the presence of nonmagnetic impurities. Evidence that a new;competing order is stabilized around the impurities and in turn induces;a reentrance phase transition is reported. Implications for local;magnetic measurement of the parent compound of iron pnictides are;briefly discussed.;Weber, Cedric/D-5027-2014;Weber, Cedric/0000-0002-6989-2700;4;0;0;0;4;1098-0121;WOS:000311693900005;;;J;Weston, L.;Cui, X. Y.;Delley, B.;Stampfl, C.;Band offsets and polarization effects in wurtzite ZnO/Mg0.25Zn0.75O;superlattices from first principles;PHYSICAL REVIEW B;86;20;205322;10.1103/PhysRevB.86.205322;NOV 29 2012;2012;Using first-principles calculations, we investigate the band offsets,;built-in electric fields, and band gaps of (0001)-oriented wurtzite;ZnO/Mg0.25Zn0.75O superlattices, including the dependence on;superlattice geometry and strain. Significant built-in electric fields;form inside the quantum-well region that are found to be tunable over;the range 0.24 MV/cm <= E-w <= 0.63 MV/cm, and potentially up to 1MV/cm;by varying the relative width of the well and barrier regions. The;valence band offset at the ZnO/Mg0.25Zn0.75O interface is calculated to;be 0.25-0.26 eV which, in contrast to the "common anion rule," is a;significant portion of the total band offset, and this is in support of;recent experiment. Calculated values for the valence band offset were;found to be insensitive to variations in superlattice geometry and;strain. The band gap of the superlattice is determined by the competing;effects of quantum confinement and the quantum-confined Stark effect,;with the former being more dominant for the systems investigated. These;findings will be useful in the design and optimization of ZnO/MgxZn1-xO;superlattices for electronics and optoelectronics applications.;Delley, Bernard/E-1336-2014;Delley, Bernard/0000-0002-7020-2869;3;0;1;0;4;1098-0121;WOS:000311694300003;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;PHYSICAL REVIEW B;86;19;195141;10.1103/PhysRevB.86.195141;NOV 29 2012;2012;We perform realistic first-principles calculations of iron chalcogenides;and ruthenate-based materials to identify experimental signatures of;Hund's-coupling-induced correlations in these systems. We find that FeTe;and KxFe2-yAs2 display unusual orbital-dependent fractional power-law;behavior in their quasiparticle self-energy and optical conductivity, a;phenomenon first identified in SrRuO3. Strong incoherence in the;paramagnetic state of these materials results in electronic states;hidden to angle-resolved photoemission spectroscopy which reemerge at;low temperatures. We identify the effective low-energy Hamiltonian;describing these systems and show that these anomalies are not;controlled by the proximity to a quantum critical point but result from;coexistence of fast quantum mechanical orbital fluctuations and slow;spin fluctuations.;Yin, Zhiping/G-3949-2012;Yin, Zhiping/0000-0001-8679-5251;10;0;0;0;10;1098-0121;WOS:000311694200002;;;J;Kumar, A.;Fennie, C. J.;Rabe, K. M.;Spin-lattice coupling and phonon dispersion of CdCr2O4 from first;principles;PHYSICAL REVIEW B;86;18;184429;10.1103/PhysRevB.86.184429;NOV 28 2012;2012;First-principles calculations are used to investigate the effects of;magnetic ordering on the minimum-energy structure and on the full phonon;dispersion relation of CdCr2O4, focusing on the changes through the;coupled magnetic/structural transition which shows relief of the;geometric frustration of the antiferromagnetic ordering on the;pyrochlore lattice. We computed the full phonon dispersion relations for;the ferromagnetic and antiferromagnetic orderings in cubic and;tetragonal structures of CdCr2O4. We extracted the phonon dispersion for;the cubic paramagnetic phase and found that it compares wellwith the;experimental results. The AFM ordering is seen to lower the symmetry and;induce a lattice distortion comparable in magnitude to that observed in;the transition. While the spin-phonon couplings are large for modes;which involve displacement of the Cr atoms, there are no unstable modes;at any point in the Brillouin zone for either of the magnetic orderings;considered, and thus we conclude that the phase transition is driven not;by spin-phonon coupling, but by the atomic forces and stresses induced;by the magnetic order. Finally, by comparison of the phonon frequencies;for structures with different magnetic orderings and structural;distortions, we find that the spin-phonon coupling, rather than the;coupling of the phonons to the structural change, is the dominant factor;in the observed changes of phonon frequencies through the phase;transition.;Kumar, Anil/A-9834-2013;Kumar, Anil/0000-0002-4901-8987;1;0;0;0;1;1098-0121;WOS:000311604700002;;;J;Lin, Shi-Zeng;Bulaevskii, Lev N.;Batista, Cristian D.;Vortex dynamics in ferromagnetic superconductors: Vortex clusters,;domain walls, and enhanced viscosity;PHYSICAL REVIEW B;86;18;180506;10.1103/PhysRevB.86.180506;NOV 28 2012;2012;We demonstrate that there is a long-range vortex-vortex attraction in;ferromagnetic superconductors due to polarization of the magnetic;moments. Vortex clusters are then stabilized in the ground state for low;vortex densities. The motion of vortex clusters driven by the Lorentz;force excites magnons. This regime becomes unstable at a threshold;velocity above which domain walls are generated for slow relaxation of;the magnetic moments and the vortex configuration becomes modulated.;This dynamics of vortices and magnetic moments can be probed by;transport measurements.;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;6;0;0;0;6;1098-0121;WOS:000311604700001;;;J;Wong, Chris L. M.;Law, K. T.;Majorana Kramers doublets in dx2-y2-wave superconductors with Rashba;spin-orbit coupling;PHYSICAL REVIEW B;86;18;184516;10.1103/PhysRevB.86.184516;NOV 28 2012;2012;In this work, we show that a quasi-one-dimensional d(x2-y2)-wave;superconductor with Rashba spin-orbit coupling is a DIII class,;time-reversal invariant, topological superconductor (TS), which supports;a Majorana Kramers Doublet (MKD) at each end of the TS. A MKD is a pair;of Majorana end states (MESs) protected by time-reversal symmetry (TRS).;An external magnetic field breaks TRS and drives the system from DIII to;D class in which case a single MES appears at each end of the TS. We;show that a MKD induces resonant Andreev reflection with zero-bias;conductance peak of 4e(2)/h. Experimental realizations of the proposed;model are discussed.;Law, Kam/H-1410-2011;19;1;0;0;19;1098-0121;WOS:000311604700003;;;J;De Luca, M.;Pettinari, G.;Ciatto, G.;Amidani, L.;Filippone, F.;Polimeni, A.;Fonda, E.;Boscherini, F.;Bonapasta, A. Amore;Giubertoni, D.;Knuebel, A.;Lebedev, V.;Capizzi, M.;Identification of four-hydrogen complexes in In-rich InxGa1-xN (x > 0.4);alloys using photoluminescence, x-ray absorption, and density functional;theory;PHYSICAL REVIEW B;86;20;201202;10.1103/PhysRevB.86.201202;NOV 28 2012;2012;Postgrowth hydrogen incorporation in In-rich InxGa1-xN (x > 0.4) alloys;strongly modifies the optical and structural properties of the material:;A large blueshift of the emission and absorption energies is accompanied;by a remarkable broadening of the interatomic-distance distribution, as;probed by synchrotron radiation techniques. Both effects vanish at a;finite In-concentration value (x similar to 0.5). Synergic x-ray;absorption measurements and first-principle calculations unveil two;different defective species forming upon hydrogenation: one due to the;high chemical reactivity of H, the other ascribed to mere lattice;damage. In the former species, four H atoms bind to as many N atoms, all;nearest-neighbors of a same In atom. The stability of this peculiar;complex, which is predicted to behave as a donor, stems from atomic;displacements cooperating to reduce local strain.;Fonda, Emiliano/D-9666-2011; Filippone, Francesco/I-4718-2012; Pettinari, Giorgio/M-8678-2014;Filippone, Francesco/0000-0001-5862-1115; Pettinari,;Giorgio/0000-0003-0187-3770;1;0;0;0;1;1098-0121;WOS:000311605000001;;;J;Grytsyuk, Sergiy;Peskov, Maxim V.;Schwingenschloegl, Udo;First-principles modeling of interfaces between solids with large;lattice mismatch: The prototypical CoO(111)/Ni(111) interface;PHYSICAL REVIEW B;86;17;174115;10.1103/PhysRevB.86.174115;NOV 28 2012;2012;In this work we investigate the CoO(111)/Ni(111) interface by;first-principles calculations, focusing on its structure and stability.;To satisfy the approximate 5:6 ratio of the CoO and Ni lattice;constants, we construct a supercell with 5 x 5 Co (O) and 6 x 6 Ni atoms;per layer in the bulk regions. For the interface Ni layer and the;adjacent Ni layer we consider different configurations and study the;binding energy. We show for an ideal CoO interface terminated by 5 x 5 O;atoms that the structure is more stable if there are 5 x 5 Ni atoms next;to it instead of 6 x 6 as in the bulk. In addition, we observe that a;transition layer with 31 or 33 Ni atoms located between the interface 5;x 5 Ni and bulk 6 x 6 Ni layers (which partially reflects the structures;of both these layers) enhances the stability of the CoO/Ni interface.;The electronic and magnetic modifications induced by the interface;formation are discussed.;3;0;0;0;3;1098-0121;WOS:000311604400001;;;J;Luekermann, D.;Sologub, S.;Pfnuer, H.;Klein, C.;Horn-von Hoegen, M.;Tegenkamp, C.;Scattering at magnetic and nonmagnetic impurities on surfaces with;strong spin-orbit coupling;PHYSICAL REVIEW B;86;19;195432;10.1103/PhysRevB.86.195432;NOV 28 2012;2012;Adsorption-induced reduction of surface-state conductivity in epitaxial;Bi(111) films, a prototype system with large Rashba-induced;surface-state splitting, by adsorbed atoms of Bi, Fe, and Co has been;investigated by macroscopic surface magnetotransport measurements at a;temperature of 10 K. A detailed analysis of magnetotransport, dc;transport, and Hall data reveals that the scattering efficiencies for Co;and Fe are larger by a factor of 2 than that for Bi. While for the;latter charge transfer and change of band filling near the Fermi level;are negligible, we find an increase of hole concentration upon Co and Fe;adsorption. These atoms act as acceptors and immobilize on average about;0.5 electrons per adsorbed atom. Besides the dominant classical;magnetoconductance signal the films show signatures of weak;antilocalization, reflecting the strong spin-orbit coupling in Bi(111);surface states. This behavior can be changed to weak localization by the;adsorption of high concentrations (0.1 monolayers) of magnetic;impurities (Fe, Co), similarly to results found on the topological;insulator Bi2Se3. Our results demonstrate that details of chemical bond;formation for impurities are crucial for local spin moments and;electronic scattering properties.;5;0;0;0;5;1098-0121;WOS:000311604900001;;;J;Molina-Sanchez, A.;Garcia-Cristobal, A.;Bester, G.;Semiempirical pseudopotential approach for nitride-based nanostructures;and ab initio based passivation of free surfaces;PHYSICAL REVIEW B;86;20;205430;10.1103/PhysRevB.86.205430;NOV 28 2012;2012;We present a semiempirical pseudopotential method based on screened;atomic pseudopotentials and derived from ab initio calculations. This;approach is motivated by the demand for pseudopotentials able to address;nanostructures, where ab initio methods are both too costly and;insufficiently accurate at the level of the local density approximation,;while mesoscopic effective-mass approaches are inapplicable due to the;small size of the structures along, at least, one dimension. In this;work, we improve the traditional pseudopotential method by a two-step;process: First, we invert a set of self-consistently determined screened;ab initio potentials in wurtzite GaN for a range of unit-cell volumes,;thus determining spherically symmetric and structurally averaged atomic;potentials. Second, we adjust the potentials to reproduce observed;excitation energies. We find that the adjustment represents a reasonably;small perturbation over the potential, so that the ensuing potential;still reproduces the original wave functions, while the excitation;energies are significantly improved. We furthermore deal with the;passivation of the dangling bonds of free surfaces which is relevant for;the study of nanowires and colloidal nanoparticles. We present a;methodology to derive passivant pseudopotentials from ab initio;calculations. We apply our pseudopotential approach to the exploration;of the confinement effects on the electronic structure of GaN nanowires.;Bester, Gabriel/I-4414-2012;Bester, Gabriel/0000-0003-2304-0817;1;0;0;0;1;1098-0121;WOS:000311605000005;;;J;Patel, Aavishkar A.;Dutta, Amit;Sudden quenching in the Kitaev honeycomb model: Study of defect and heat;generation;PHYSICAL REVIEW B;86;17;174306;10.1103/PhysRevB.86.174306;NOV 28 2012;2012;We study the behavior of the defect and heat densities under sudden;quenching near the quantum critical points in the two-dimensional Kitaev;honeycomb model both in the thermodynamic and nonthermodynamic limits.;We consider quenches starting from a quantum critical point into the;gapped as well as the gapless phases. We choose points on the lines of;anisotropic quantum critical points as well as different points of;intersection of these lines as the initial points from where the;quenching starts. We find that the defect and heat densities display the;expected power-law scalings along with logarithmic corrections to;scaling (or cusp singularities) in certain cases. In the vicinity of;some of the intersection points, the scaling behaviors change,;indicating an effective dimensional reduction; the scaling behavior near;these points depends on the number of critical lines crossed in the;process of quenching. All the analytical predictions are also verified;by numerical integration.;1;0;0;0;1;1098-0121;WOS:000311604400002;;;J;Raith, Martin;Stano, Peter;Fabian, Jaroslav;Theory of spin relaxation in two-electron laterally coupled Si/SiGe;quantum dots;PHYSICAL REVIEW B;86;20;205321;10.1103/PhysRevB.86.205321;NOV 28 2012;2012;Highly accurate numerical results of phonon-induced two-electron spin;relaxation in silicon double quantum dots are presented. The relaxation,;enabled by spin-orbit coupling and the nuclei of Si-29 (natural or;purified abundance), is investigated for experimentally relevant;parameters, the interdot coupling, the magnetic field magnitude and;orientation, and the detuning. We calculate relaxation rates for zero;and finite temperatures (100 mK), concluding that our findings for zero;temperature remain qualitatively valid also for 100 mK. We confirm the;same anisotropic switch of the axis of prolonged spin lifetime with;varying detuning as recently predicted in GaAs. Conditions for possibly;hyperfine-dominated relaxation are much more stringent in Si than in;GaAs. For experimentally relevant regimes, the spin-orbit coupling,;although weak, is the dominant contribution, yielding anisotropic;relaxation rates of at least two orders of magnitude lower than in GaAs.;Raith, Martin/A-3357-2011; Stano, Peter/C-3016-2013; Fabian, Jaroslav/K-1700-2013;Fabian, Jaroslav/0000-0002-3009-4525;6;0;0;0;6;1098-0121;WOS:000311605000004;;;J;Romhanyi, Judit;Penc, Karlo;Multiboson spin-wave theory for Ba2CoGe2O7: A spin-3/2 easy-plane Neel;antiferromagnet with strong single-ion anisotropy;PHYSICAL REVIEW B;86;17;174428;10.1103/PhysRevB.86.174428;NOV 28 2012;2012;We consider the square-lattice antiferromagnetic Heisenberg Hamiltonian;extended with a single-ion axial anisotropy term as a minimal model for;the multiferroic Ba2CoGe2O7. Developing a multiboson spin-wave theory,;we investigate the dispersion of the spin excitations in this spin-3/2;system. As a consequence of a strong single-ion anisotropy, a stretching;(longitudinal) spin mode appears in the spectrum. The inelastic neutron;scattering spectra of Zheludev et al. [Phys. Rev. B 68, 024428 (2003)];are successfully reproduced by the low energy modes in the multiboson;spin-wave theory, and we anticipate the appearance of the spin;stretching modes at approximate to 4 meV that can be identified using;the calculated dynamical spin structure factors. We expect the;appearance of spin stretching modes for any S > 1/2 compound where the;single-ion anisotropy is significant.;Penc, Karlo/A-3092-2011;Penc, Karlo/0000-0002-2197-1370;5;1;0;0;5;1098-0121;WOS:000311604400004;;;J;Sarmadian, N.;Saniz, R.;Lamoen, D.;Partoens, B.;Influence of Al concentration on the optoelectronic properties of;Al-doped MgO;PHYSICAL REVIEW B;86;20;205129;10.1103/PhysRevB.86.205129;NOV 28 2012;2012;We use density functional theory within the local density approximation;to investigate the structural, electronic, and optical properties of;Al-doped MgO. The concentrations considered range from 6% to 56%. In the;latter case, we also compare the optical properties of the amorphous and;crystalline phases. We find that, overall, the electronic properties of;the crystalline phases change qualitatively little with Al;concentration. On the other hand, the changes in the electronic;structure in the amorphous phase are more important, most notably;because of deep impurity levels in the band gap that are absent in the;crystalline phase. This leads to observable effects in, e.g., the;optical absorption edge and in the refractive index. Thus, the latter;can be used to characterize the crystalline to amorphous transition with;Al doping level.;0;0;0;0;0;1098-0121;WOS:000311605000003;;;J;Smadici, S.;Nelson-Cheeseman, B. B.;Bhattacharya, A.;Abbamonte, P.;Interface ferromagnetism in a SrMnO3/LaMnO3 superlattice;PHYSICAL REVIEW B;86;17;174427;10.1103/PhysRevB.86.174427;NOV 28 2012;2012;Resonant soft x-ray absorption measurements at the O K edge on a;SrMnO3/LaMnO3 superlattice show a shoulder at the energy of doped holes,;which corresponds to the main peak of resonant scattering from the;modulation in the doped hole density. Scattering line shape at the Mn;L-3,L-2 edges has a strong variation below the ferromagnetic transition;temperature. This variation has a period equal to half the superlattice;superperiod and follows the development of the ferromagnetic moment,;pointing to a ferromagnetic phase developing at the interfaces. It;occurs at the resonant energies for Mn3+ and Mn4+ valences. A model for;these observations is presented, which includes a double-exchange;two-site orbital and the variation with temperature of the hopping;frequency t(ij) between the two sites.;Bhattacharya, Anand/G-1645-2011;Bhattacharya, Anand/0000-0002-6839-6860;1;0;0;0;1;1098-0121;WOS:000311604400003;;;J;Zanotto, Simone;Degl'Innocenti, Riccardo;Xu, Ji-Hua;Sorba, Lucia;Tredicucci, Alessandro;Biasiol, Giorgio;Ultrafast optical bleaching of intersubband cavity polaritons;PHYSICAL REVIEW B;86;20;201302;10.1103/PhysRevB.86.201302;NOV 28 2012;2012;We report on the transition from the strong to the weak light-matter;coupling regime between an intersubband excitation and a photonic;crystal resonance in a nanostructured semiconductor membrane. Such a;transition is induced by varying the intensity of an ultrafast light;pulse, which is employed for pumping and probing the system eigenmodes.;The phenomenon is interpreted in terms of the saturation of the;intersubband transition due to the large number of photoexcited;electrons in the quantum well, as confirmed by a thorough analysis;performed both in frequency and time domain.;Biasiol, Giorgio/C-5465-2009;Biasiol, Giorgio/0000-0001-7974-5459;5;0;0;0;5;1098-0121;WOS:000311605000002;;;J;Ciric, L.;Sienkiewicz, A.;Gaal, R.;Jacimovic, J.;Vaju, C.;Magrez, A.;Forro, L.;Defects and localization in chemically-derived graphene;PHYSICAL REVIEW B;86;19;195139;10.1103/PhysRevB.86.195139;NOV 27 2012;2012;We have performed electron spin resonance (ESR) measurements on a large;assembly of graphene oxide (GO) and reduced graphene oxide (RGO) flakes.;In GO samples the Curie tail is coming from 1.4 x 10(18) cm(-3) of;localized spins. Although reduction of GO was expected to reestablish;the pristine properties of graphene, no Pauli-like contribution was;detected and only a low concentration of 1.2 x 10(16) cm(-3) spin;carrying defects were measured. Our study, completed by resistivity;measurements, shows that the carrier transport in RGO samples is;dominated by hopping. The incomplete reduction of GO leaves behind a;large number of defects, presumably the majority of which are ESR;silent, causing the Anderson localization of the electronic states.;Slight doping with potassium indicates the appearance of a Pauli;contribution in the spin susceptibility.;Jacimovic, Jacim/C-2674-2013;2;0;0;0;2;1098-0121;WOS:000311537100001;;;J;Dietz, O.;Stoeckmann, H. -J.;Kuhl, U.;Izrailev, F. M.;Makarov, N. M.;Doppler, J.;Libisch, F.;Rotter, S.;Surface scattering and band gaps in rough waveguides and nanowires;PHYSICAL REVIEW B;86;20;201106;10.1103/PhysRevB.86.201106;NOV 27 2012;2012;The boundaries of waveguides and nanowires have drastic influence on;their coherent scattering properties. Designing the boundary profile is;thus a promising approach for transmission and band-gap engineering with;many applications. By performing an experimental study of microwave;transmission through rough waveguides we demonstrate that a recently;proposed surface scattering theory can be employed to predict the;measured transmission properties from the boundary profiles and vice;versa. A new key ingredient of this theory is a scattering mechanism;which depends on the squared gradient of the surface profiles. We;demonstrate the nontrivial effects of this scattering mechanism by;detailed mode-resolved microwave measurements and numerical simulations.;Dietz, Otto/E-9025-2011;4;0;0;0;4;1098-0121;WOS:000311537400001;;;J;Duong, Duc T.;Toney, Michael F.;Salleo, Alberto;Role of confinement and aggregation in charge transport in;semicrystalline polythiophene thin films;PHYSICAL REVIEW B;86;20;205205;10.1103/PhysRevB.86.205205;NOV 27 2012;2012;Crystallite orientations, molecular packing disorder, and hole mobility;of poly(3-hexylthiophene) thin films that are spin casted from different;solvents are studied as a function of film thickness. Grazing incidence;x-ray diffraction reveals that films consist of an ultrathin layer of;ordered, edge-on oriented aggregates and a more disordered, face-on;oriented bulk region. Diffraction and optical absorption spectroscopy;elucidate the film-forming process. Field-effect hole mobility provides;evidence for interconnecting aggregates as the mechanism for efficient;charge transport.;12;1;0;0;12;1098-0121;WOS:000311537400002;;;J;Farrell, David E.;Wolverton, C.;Structure and diffusion in liquid complex hydrides via ab initio;molecular dynamics;PHYSICAL REVIEW B;86;17;174203;10.1103/PhysRevB.86.174203;NOV 27 2012;2012;We have used density functional theory based ab initio molecular;dynamics (AIMD) to study NaAlH4, LiBH4, LiNH2, and Li2BNH6 across a;range of temperatures, above and below the experimental melting;temperature. We have elucidated the structure, vibrational, and;diffusion characteristics of these four materials. We find: (i) In all;cases, the liquid state remains a mixture of the ions found in the solid;state. (ii) The anions remain intact on average but undergo large;deformations across the range of temperatures. (iii) In the case of;LiNH2, there is evidence that the Li+ sublattice melts before the;anionic sublattice. (iv) We find a connection between increased;anion-anion ordering and reduced anion mobility even above the;experimental melting point, due to long range Coulombic interactions;between anions. (v) Finally, we find the liquid has the same major;vibrational modes as the solid, though the lower frequency vibration and;rotation modes become more prominent with increasing temperature.;Wolverton, Christopher/B-7542-2009;1;0;0;0;1;1098-0121;WOS:000311536400001;;;J;Gebhardt, Julian;Vines, Francesc;Goerling, Andreas;Influence of the surface dipole layer and Pauli repulsion on band;energies and doping in graphene adsorbed on metal surfaces;PHYSICAL REVIEW B;86;19;195431;10.1103/PhysRevB.86.195431;NOV 27 2012;2012;The synthesis of single-layer graphene sheets on metal surfaces can be;carried out routinely nowadays. The energetic alignment of the graphene;band structure, including the position of the Dirac point relative to;the Fermi level of the metal, and subsequently, the doping level of the;graphene sheet, depends crucially on the graphene-metal distance and the;specific metal considered. These dependencies are studied with;density-functional theory considering as typical metal surfaces Au(111),;Ni(111), and Au/Ni(111). In the latter case, a single layer of gold is;intercalated between the Ni(111) surface and the graphene sheet. We show;that the energetic positions of eigenstates of helium adsorbed on a;Au(111) surface exhibit a behavior with the adsorption distance;qualitatively comparable to that of bands of physisorbed graphene. In;both cases, the distance dependence of the energy of adsorbate bands can;be explained by the effect of the surface dipole layer on the adsorbate;bands and by electrostatic interactions caused by small charge;rearrangements due to Pauli repulsion between metal surface and;graphene. These charge rearrangements are neither caused by a charge;transfer nor by chemical interactions due to conventional orbital;interaction but have the effect to reduce the overlap of the surface;charge density of the metal with the charge density of the adsorbate.;The latter effect is known as pillow effect from molecules adsorbed on;metal surfaces. Charge transfer between graphene and the metal substrate;does occur but has an opposite effect to the surface dipole layer and;Pauli repulsion, i.e., reduces the effect of the latter. For very large;adsorption distances, this charge transfer vanishes in such a way that;the Dirac point of graphene aligns with the metal Fermi energy. It is;shown that the amount and character of graphene doping can be controlled;by tuning the graphene-metal distance. For a proper description of the;involved electrostatic potentials, a finite-slab correction had to be;applied to them in order to take into account the finite size of the;metal slabs used to model the substrate.;10;0;0;0;10;1098-0121;WOS:000311537100002;;;J;Han, Jae-Ho;Lee, Hyun-Woo;Interlayer exchange coupling between next nearest neighbor layers;PHYSICAL REVIEW B;86;17;174426;10.1103/PhysRevB.86.174426;NOV 27 2012;2012;Interlayer exchange coupling (IEC) between next nearest neighbor;magnetic layers is investigated. For a multilayer system that contains;threemagnetic layers (with magnetization directionsm (m)over-cap(1),;(m)(m)over-cap(2), and (m)(m)over-cap(3), respectively) separated by two;nonmagnetic layers, the angle dependence of the coupling energy and the;thickness dependence of coupling constants were obtained. In addition to;the well known nearest neighbor IEC of the form;-(J)over-tilde(12)(m)over-cap(1) center dot (m)over-cap(2) and;-(J)over-tilde(23)(m)over-cap(2) center dot (m)over-cap(3), we find the;next nearest neighbor IEC of the form -(J);over-tilde(123)((m)over-cap(1) center dot (m)over-cap(2))((m)over-cap(2);center dot (m)over-cap(3)), which is different from the Heisenberg type;next nearest neighbor coupling -J(13)(m)over-cap(1) center dot;(m)over-cap(3). The strength of the next nearest neighbor IEC oscillates;with respect to the thickness of both magnetic and nonmagnetic layers.;The strength of the next nearest neighbor IEC is generally smaller than;the conventional nearest neighbor IEC, but is large enough to allow for;experimental detection.;Lee, Hyun-Woo/B-8995-2008;Lee, Hyun-Woo/0000-0002-1648-8093;1;0;0;0;1;1098-0121;WOS:000311536400003;;;J;Lazo, Cesar;Neel, Nicolas;Kroeger, Joerg;Berndt, Richard;Heinze, Stefan;Tunneling magnetoresistance and exchange interaction in single-atom;contacts;PHYSICAL REVIEW B;86;18;180406;10.1103/PhysRevB.86.180406;NOV 27 2012;2012;The tunneling magnetoresistance of single-atom junctions is shown to;depend on the electrode separation owing to exchange forces and the;resulting geometric relaxations. An analytical model is proposed to;extract relaxations from the magnetoresistances measured with a scanning;tunneling microscope. Exchange forces and relaxations calculated within;density functional theory demonstrate the validity of the model for a;range of distances between tip and sample which extends from tunneling;close to the point of maximal attraction.;3;0;0;0;3;1098-0121;WOS:000311536700001;;;J;Luo, Xin;Sullivan, Michael B.;Quek, Su Ying;First-principles investigations of the atomic, electronic, and;thermoelectric properties of equilibrium and strained Bi2Se3 and Bi2Te3;including van der Waals interactions;PHYSICAL REVIEW B;86;18;184111;10.1103/PhysRevB.86.184111;NOV 27 2012;2012;Bi2Se3 and Bi2Te3 are layered compounds of technological importance,;being excellent thermoelectric materials as well as topological;insulators. We report density functional theory calculations of the;atomic, electronic, and thermoelectric properties of strained bulk and;thin-film Bi2Se3 and Bi2Te3, focusing on an appropriate description of;van der Waals (vdW) interactions. The calculations show that the van der;Waals density functional (vdW-DF) with Cooper's exchange (vdW-DFxC09);can reproduce closely the experimental interlayer distances in;unstrained Bi2Se3 and Bi2Te3. Interestingly, we predict atomic;structures that are in much better agreement with the experimentally;determined structure from Nakajima than that obtained from Wyckoff,;especially for Bi2Se3, where the difference in atomic structures;qualitatively changes the electronic band structure. The band structure;obtained using the Nakajima structure and the vdW-DFxC09 optimized;structure are in much better agreement with previous reports of;photoemission measurements, than that obtained using the Wyckoff;structure. Using vdW-DFxC09 to fully optimize atomic structures of bulk;and thin-film Bi2Se3 and Bi2Te3 under different in-plane and uniaxial;strains, we predict that the electronic bandgap of both the bulk;materials and thin films decreases with tensile in-plane strain and;increases with compressive in-plane strain. We also predict, using the;semiclassical Boltzmann approach, that the magnitude of the n-type;Seebeck coefficient of Bi2Te3 can be increased by the compressive;in-plane strain while that of Bi2Se3 can be increased with tensile;in-plane strain. Further, the in-plane power factor of n-doped Bi2Se3;can be increased with compressive uniaxial strain while that of n-doped;Bi2Te3 can be increased by compressive in-plane strain. Strain;engineering thus provides a direct method to control the electronic and;thermoelectric properties in these thermoelectric topological insulator;materials.;Quek, Su Ying/I-2934-2014;11;0;0;0;11;1098-0121;WOS:000311536700003;;;J;Olejnik, E.;Pandit, B.;Basel, T.;Lafalce, E.;Sheng, C-X.;Zhang, C.;Jiang, X.;Vardeny, Z. V.;Ultrafast optical studies of ordered poly(3-thienylene-vinylene) films;(vol 85, 235201, 2012);PHYSICAL REVIEW B;86;19;199903;10.1103/PhysRevB.86.199903;NOV 27 2012;2012;0;0;0;0;0;1098-0121;WOS:000311537100003;;;J;Qin, Zhen-Xing;Zhang, Chao;Tang, Ling-Yun;Zhong, Guo-Hua;Lin, Hai-Qing;Chen, Xiao-Jia;High-pressure phases of a hydrogen-rich compound: Tetramethylgermane;PHYSICAL REVIEW B;86;18;184110;10.1103/PhysRevB.86.184110;NOV 27 2012;2012;The vibrational and structural properties of a hydrogen-rich group IVa;hydride, Ge(CH3)(4), are studied by combining Raman spectroscopy and;synchrotron x-ray diffraction measurements at room temperature and at;pressures up to 30.2 GPa. Both techniques allow the obtaining of;complementary information on the high-pressure behaviors and yield;consistent phase transitions at 1.4 GPa for the liquid to solid and 3.0,;5.4, and 20.3 GPa for the solid to solid. The four high-pressure solid;phases are identified to have the cubic, orthorhombic, monoclinic, and;monoclinic crystal structures with space groups of Pa-3 for phase I,;Pnma for phase II, P2(1)/c for phase III, and P2(1) for phase IV,;respectively. These transitions are suggested to result from the changes;in the inter- and intramolecular bonding of this compound. The softening;of some Raman modes on CH3 groups and their sudden disappearance;indicate that Ge(CH3)(4) might be an ideal compound to realize;metallization and even high-temperature superconductivity at modest;static pressure for laboratory capability.;Zhong, Guohua/A-8811-2011; Zhang, Chao/E-5109-2010;Zhong, Guohua/0000-0003-0673-8738; Zhang, Chao/0000-0002-5957-2287;3;0;0;0;3;1098-0121;WOS:000311536700002;;;J;Wdowik, U. D.;Koza, M. M.;Chatterji, T.;Phonons in lanthanum manganite: Inelastic neutron scattering and density;functional theory studies;PHYSICAL REVIEW B;86;17;174305;10.1103/PhysRevB.86.174305;NOV 27 2012;2012;Dynamical properties of the lanthanum manganite lattice are examined by;inelastic neutron scattering experiments and density functional theory;calculations. Densities of vibrational states are measured close to the;Jahn-Teller transition temperature of 750 K. Substantial changes;observed in the phonon spectra above the phase transformation are due to;residual orthorhombic distortions that persist in the high-temperature;structure of lanthanum manganite. Results of the present theoretical;investigations supply additional information useful for both Raman and;infrared spectroscopies. In addition, they indicate that typical static;phonon calculations are insufficient to reproduce accurately;experimental magnitudes of these vibrational quantities of lanthanum;manganite that are determined to a large extent by dynamical effects.;0;0;0;0;0;1098-0121;WOS:000311536400002;;;J;Yan, Wei;Wubs, Martijn;Mortensen, N. Asger;Hyperbolic metamaterials: Nonlocal response regularizes broadband;supersingularity;PHYSICAL REVIEW B;86;20;205429;10.1103/PhysRevB.86.205429;NOV 27 2012;2012;We study metamaterials known as hyperbolic media that in the usual;local-response approximation exhibit hyperbolic dispersion and an;associated broadband singularity in the density of states. Instead, from;the more microscopic hydrodynamic Drude theory we derive qualitatively;different optical properties of these metamaterials, due to the;free-electron nonlocal optical response of their metal constituents. We;demonstrate that nonlocal response gives rise to a large-wavevector;cutoff in the dispersion that is inversely proportional to the Fermi;velocity of the electron gas, but also for small wavevectors we find;differences for the hyperbolic dispersion. Moreover, the size of the;unit cell influences effective parameters of the metamaterial even in;the deep subwavelength regime. Finally, instead of the broadband;supersingularity in the local density of states, we predict a large but;finite maximal enhancement proportional to the inverse cube of the Fermi;velocity.;Mortensen, Niels Asger/C-3592-2008; Wubs, Martijn/B-4934-2008;Mortensen, Niels Asger/0000-0001-7936-6264; Wubs,;Martijn/0000-0002-8286-7825;28;3;0;0;28;1098-0121;WOS:000311537400003;;;J;Yoneda, Y.;Kitanaka, Y.;Noguchi, Y.;Miyayama, M.;Electronic and local structures of Mn-doped BiFeO3 crystals;PHYSICAL REVIEW B;86;18;184112;10.1103/PhysRevB.86.184112;NOV 27 2012;2012;The electronic structure of complex oxides is important for;understanding their functional properties. Here, we report the results;of investigating multiferroic BiFeO3 using various x-ray spectroscopy;techniques. Zn- and Mn-codoped and Mn-doped BiFeO3 samples were prepared;with the aim of improving ferroelectric properties of BiFeO3. The;valences of the doped Mn and host Fe were investigated. When oxygen;vacancies exist in the sample, Mn acts as a hole acceptor. Furthermore,;Mn and Fe stabilize the perovskite unit by changing their ionic radius.;As a result, Mn and Fe atoms exhibit various valence states in the;BiFeO3 system. Evidence of the electronic structure for Fe 3d-O 2p-Bi 6s;hybridization is also presented.;2;0;0;0;2;1098-0121;WOS:000311536700004;;;J;Despoja, V.;Mowbray, D. J.;Vlahovic, D.;Marusic, L.;TDDFT study of time-dependent and static screening in graphene;PHYSICAL REVIEW B;86;19;195429;10.1103/PhysRevB.86.195429;NOV 26 2012;2012;Time-dependent density functional theory (TDDFT) within the random phase;approximation (RPA) is used to obtain the time evolution of the induced;potential produce by the sudden formation of a C 1s core hole inside a;graphene monolayer, and to show how the system reaches the equilibrium;potential. The characteristic oscillations in the time-dependent;screening potential are related to the excitations of pi and sigma + pi;plasmons as well as the low energy 2D plasmons in doped graphene. The;equilibrium RPA screened potential is compared with the DFT effective;potential, yielding good qualitative agreement. The self energy of a;point charge near a graphene monolayer is shown to demonstrate an image;potential type behavior, Ze/(z - z(0)), down to very short distances (4;a.u.) above the graphene layer. Both results are found to agree near;quantitatively with the DFT ground state energy shift of a Li+ ion;placed near a graphene monolayer.;Mowbray, Duncan/A-5531-2010; CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Mowbray, Duncan/0000-0002-8520-0364;;4;0;0;0;4;1098-0121;WOS:000311544500013;;;J;Anspoks, A.;Kalinko, A.;Kalendarev, R.;Kuzmin, A.;Atomic structure relaxation in nanocrystalline NiO studied by EXAFS;spectroscopy: Role of nickel vacancies;PHYSICAL REVIEW B;86;17;174114;10.1103/PhysRevB.86.174114;NOV 26 2012;2012;Nanocrystalline NiO samples have been studied using the Ni K-edge;extended x-ray absorption fine structure (EXAFS) spectroscopy and;recently developed modeling technique, combining classical molecular;dynamics with ab initio multiple-scattering EXAFS calculations;(MD-EXAFS). Conventional analysis of the EXAFS signals from the first;two coordination shells of nickel revealed that (i) the second shell;average distance R(Ni-Ni-2) expands in nanocrystalline NiO compared to;microcrystalline NiO, in agreement with overall unit cell volume;expansion observed by x-ray diffraction; (ii) on the contrary, the first;shell average distance R(Ni-O-1) in nanocrystalline NiO shrinks compared;to microcrystalline NiO; (iii) the thermal contribution into the;mean-square relative displacement sigma(2) is close in both;microcrystalline and nanocrystalline NiO and can be described by the;Debye model; (iv) the static disorder is additionally present in;nanocrystalline NiO in both the first Ni-O-1 and second Ni-Ni-2 shells;due to nanocrystal structure relaxation. Within the MD-EXAFS method, the;force-field potential models have been developed for nanosized NiO using;as a criterion the agreement between the experimental and theoretical;EXAFS spectra. The best solutions have been obtained for the 3D;cubic-shaped nanoparticle models with nonzero Ni vacancy concentration;C-vac: C-vac approximate to 0.4-1.2% for NiO nanoparticles having the;cube size of L approximate to 3.6-4.2 nm and C-vac approximate to;1.6-2.0% for NiO thin film composed of cubic nanograins with a size of L;approximate to 1.3-2.1 nm. Thus our results show that the Ni vacancies;in nanosized NiO play important role in its atomic structure relaxation;along with the size reduction effect.;Kuzmin, Alexei/A-2400-2010; Anspoks, Andris/E-8602-2010; Kalinko, Aleksandr/A-3421-2010;Kuzmin, Alexei/0000-0003-4641-6354; Anspoks, Andris/0000-0002-5162-4521;;;8;0;0;0;8;1098-0121;WOS:000311543200002;;;J;Dahlhaus, J. P.;Gibertini, M.;Beenakker, C. W. J.;Scattering theory of topological invariants in nodal superconductors;PHYSICAL REVIEW B;86;17;174520;10.1103/PhysRevB.86.174520;NOV 26 2012;2012;Time-reversal invariant superconductors having nodes of vanishing;excitation gap support zero-energy boundary states with topological;protection. Existing expressions for the topological invariant are given;in terms of the Hamiltonian of an infinite system. We give an;alternative formulation in terms of the Andreev reflection matrix of a;normal-metal-superconductor interface. This allows us to relate the;topological invariant to the angle-resolved Andreev conductance also;when the boundary state in the superconductor has merged with the;continuum of states in the normal metal. A variety of symmetry classes;is obtained, depending on additional unitary symmetries of the;reflection matrix. We derive conditions for the quantization of the;conductance in each symmetry class and test these on a model for a;two-or three-dimensional superconductor with spin-singlet and;spin-triplet pairing, mixed by Rashba spin-orbit interaction.;Beenakker, Carlo/B-7424-2008;Beenakker, Carlo/0000-0003-4748-4412;8;0;0;0;8;1098-0121;WOS:000311543200007;;;J;Ehlers, D.;Tsurkan, V.;von Nidda, H. -A. Krug;Loidl, A.;
7:5:64:1     Time-resolved nonlinear infrared spectroscopy of samarium ions in SmFeO3
DOI:10.1103/PhysRevB.87.085101  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Bossini, D.;Malik, D.;Redlich, B.;van der Meer, A. F. G.;Pisarev, R. V.;Rasing, Th.;Kimel, A. V.;
7:5:64:2     Structure and hyperfine interactions in Bi1-xNdxFeO3 solid solutions prepared by solid-state sintering
DOI:10.1016/j.jallcom.2014.04.011  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Pikula, T.;Dzik, J.;Lisinska-Czekaj, A.;Czekaj, D.;Jartych, E.;
7:5:64:3     The role of 4f-electron on spin reorientation transition of NdFeO3: A first principle study
DOI:10.1063/1.4716187  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Chen, La;Li, Tongwei;Cao, Shixun;Yuan, Shujuan;Hong, Feng;Zhang, Jincang;
7:5:64:4     Enhanced 4f-3d interaction by Ti-doping on the magnetic properties of perovskite SmFe1-xTixO3
DOI:10.1063/1.4821503  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Zhao, Huazhi;Cao, Shixun;Huang, Ruoxiang;Ren, Wei;Yuan, Shujuan;Kang, Baojuan;Lu, Bo;Zhang, Jincang;
7:5:64:5     Magnetic properties of NdFeO3 single crystal in the spin reorientation region
DOI:10.1063/1.3562259  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Yuan, Shujuan;Wang, Yabin;Shao, Mingjie;Chang, Fenfen;Kang, Baojuan;Isikawa, Yosikazu;Cao, Shixun;
7:5:65:1     Structural, magnetic, dielectric properties of multiferroic GaFeO3 prepared by solid state reaction and sol-gel methods
DOI:10.1016/j.jallcom.2009.11.099  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:25  AU: Mohamed, M. Bakr;Senyshyn, A.;Ehrenberg, H.;Fuess, H.;
7:5:65:2     Study of site-disorder in epitaxial magneto-electric GaFeO3 thin films
DOI:10.1063/1.4807757  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Sharma, Kavita;Reddy, V. Raghavendra;Gupta, Ajay;Choudhary, R. J.;Phase, D. M.;Ganesan, V.;
7:5:65:3     Dielectric anomaly and magnetic properties of multiferroic GaFe0.75Mn0.25O3
DOI:10.1016/j.matlet.2012.07.007  JN:MATERIALS LETTERS  PY:2012
  TC:3  AU: Mohamed, Mohamed Bakr;Hinterstein, Manuel;Fuess, H.;
7:5:65:4     Grain size effect on site-disorder and magnetic properties of multiferroic GaFeO3 nanoparticles
DOI:10.1063/1.4838057  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Han, T. C.;Chen, T. Y.;Lee, Y. C.;
7:5:65:5     Effect of cobalt doping on site-disorder and magnetic behavior of magnetoelectric GaFeO3 nanoparticles
DOI:10.1063/1.4902874  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Han, T. C.;Lee, Y. C.;Chu, Y. T.;
7:5:65:6     Effect of Mn doping on structural and magnetic properties of GaFeO3
DOI:10.1016/j.jmmm.2011.03.019  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:7  AU: Mohamed, M. Bakr;Fuess, H.;
7:5:66:1     Strain induced ferromagnetism in epitaxial Cr2O3 thin films integrated on Si(001)
DOI:10.1063/1.4896975  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Punugupati, Sandhyarani;Narayan, Jagdish;Hunte, Frank;
7:5:66:2     Fabrication of Chromium (III) Oxide (Cr2O3) Coating by Electrophoretic Deposition
DOI:10.1111/jace.13147  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Zhang, Daixiong;Li, Xueming;Qin, Bo;Li, Xiaolin;Guo, Xiaogang;Lai, Chuan;
7:5:66:3     Enlarged Mn 3s splitting and room-temperature ferromagnetism in epitaxially grown oxygen doped Mn2N0.86 films
DOI:10.1063/1.4901210  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Meng, M.;Wu, S. X.;Ren, L. Z.;Zhou, W. Q.;Wang, Y. J.;Wang, G. L.;Li, S. W.;
7:5:66:4     Epitaxial growth of Cr2O3 thin film on Al2O3 (0001) substrate by radio frequency magnetron sputtering combined with rapid-thermal annealing
DOI:10.1016/j.tsf.2010.01.046  JN:THIN SOLID FILMS  PY:2010
  TC:10  AU: Jeong, Sang-Yong;Lee, Jin-Bok;Na, Hyunseok;Seong, Tae-Yeon;
7:5:66:5     Structural and electrical properties of Ni-Cr oxide films prepared by magnetron sputtering
DOI:10.1016/j.tsf.2011.10.027  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Saito, N.;Nakaaki, I.;Iwata, H.;Nishioka, K.;
7:5:66:6     Growth and magnetic property of xi-phase Mn2N1 +/- x thin films by plasma-assisted molecular beam epitaxy
DOI:10.1063/1.3386516  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Liu, Yajing;Xu, Lingmin;Li, Xinyu;Hu, Ping;Li, Shuwei;
7:5:66:7     Cr2O3 thin films grown at room temperature by low pressure laser chemical vapour deposition
DOI:10.1016/j.tsf.2011.01.382  JN:THIN SOLID FILMS  PY:2011
  TC:9  AU: Sousa, P. M.;Silvestre, A. J.;Conde, O.;
7:5:66:8     Magnetic configuration, electronic structure, and stability of the low-index surfaces of eta-Mn3N2: A first-principles study
DOI:10.1103/PhysRevB.86.155455  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Kedziorski, Andrzej;Carmen Munoz, M.;
7:5:67:1     Strong magnetoelastic coupling in orthorhombic Eu1-xYxMnO3 manganite
DOI:10.1103/PhysRevB.82.094418  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Moreira, J. Agostinho;Almeida, A.;Ferreira, W. S.;Araujo, J. P.;Pereira, A. M.;Chaves, M. R.;Costa, M. M. R.;Khomchenko, V. A.;Kreisel, J.;Chernyshov, D.;Vilela, S. M. F.;Tavares, P. B.;
7:5:67:2     Coupling between phonons and magnetic excitations in orthorhombic Eu1-xYxMnO3
DOI:10.1103/PhysRevB.81.054447  JN:PHYSICAL REVIEW B  PY:2010
  TC:14  AU: Moreira, J. Agostinho;Almeida, A.;Ferreira, W. S.;Araujo, J. E.;Pereira, A. M.;Chaves, M. R.;Kreisel, J.;Vilela, S. M. F.;Tavares, P. B.;
7:5:67:3     Composition-dependent spin-phonon coupling in mixed crystals of the multiferroic manganite Eu1-xYxMnO3 (0 <= x <= 0.5) studied by Raman spectroscopy
DOI:10.1103/PhysRevB.81.024304  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Issing, S.;Pimenov, A.;Ivanov, V. Yu.;Mukhin, A. A.;Geurts, J.;
7:5:67:4     Evidence of electron-phonon and spin-phonon couplings at the Verwey transition in Fe3O4
DOI:10.1103/PhysRevB.90.024302  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kumar, Ankit;Chaudhary, Sujeet;Pandya, Dinesh K.;Sharma, Shiv K.;
7:5:67:5     Phase diagram of the orthorhombic, lightly lutetium doped EuMnO3 magnetoelectric system
DOI:10.1103/PhysRevB.84.094414  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Oliveira, J.;Agostinho Moreira, J.;Almeida, A.;Chaves, M. R.;da Silva, J. M. M.;Oliveira, J. B.;Sa, M. A.;Tavares, P. B.;Ranjith, R.;Prellier, W.;
7:5:67:6     Effect of the external fields on the polar and dielectric properties of Eu0.8Y0.2MnO3
DOI:10.1063/1.3291122  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Moreira, J. Agostinho;Almeida, A.;Ferreira, W. S.;Chaves, M. R.;Vilela, S. M. F.;Tavares, P. B.;Kundys, B.;Ranjith, R.;Prellier, W.;
7:5:67:7     Long-range transfer of electron-phonon coupling in oxide superlattices
DOI:10.1038/NMAT3378  JN:NATURE MATERIALS  PY:2012
  TC:16  AU: Driza, N.;Blanco-Canosa, S.;Bakr, M.;Soltan, S.;Khalid, M.;Mustafa, L.;Kawashima, K.;Christiani, G.;Habermeier, H-U.;Khaliullin, G.;Ulrich, C.;Le Tacon, M.;Keimer, B.;
7:5:68:1     Electronic structure and polaronic excitation in FeVO4
DOI:10.1063/1.3646402  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Dixit, A.;Chen, P.;Lawes, G.;Musfeldt, J. L.;
7:5:68:2     Spin fluctuations and frustrated magnetism in multiferroic FeVO4
DOI:10.1103/PhysRevB.89.174412  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Zhang, J.;Ma, L.;Dai, J.;Zhang, Y. P.;He, Zhangzhen;Normand, B.;Yu, Weiqiang;
7:5:68:3     High Temperature Structural, Dielectric, and Ion Conduction Properties of Orthorhombic InVO4
DOI:10.1111/j.1551-2916.2012.05447.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Katari, Vasundhara;Patwe, Sadequa J.;Achary, Srungarpu N.;Tyagi, Avesh K.;
7:5:68:4     Photocatalytic Activity of Novel Ag4V2O7 Photocatalyst Under Visible Light Irradiation
DOI:10.1111/jace.12639  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:6  AU: Wang, Jinxiu;Yang, Xue;Chen, Jing;Xian, Jiangjun;Meng, Sugang;Zheng, Yi;Shao, Yu;Li, Danzhen;
7:5:68:5     Magnetic structure and magnetoelectric coupling in bulk and thin film FeVO4
DOI:10.1103/PhysRevB.82.024430  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Dixit, A.;Lawes, G.;Harris, A. B.;
7:5:68:6     Hydrothermally grown porous FeVO4 nanorods and their integration as active material in gas-sensing devices
DOI:10.1039/c3ta12821k  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:1  AU: Lehnen, Thomas;Valldor, Martin;Niznansky, Daniel;Mathur, Sanjay;
7:5:68:7     Study on conductivity and redox stability of iron orthovanadate
DOI:10.1016/j.matchemphys.2011.01.009  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:7  AU: Cowin, Peter I.;Lan, Rong;Zhang, Lei;Petit, Christophe T. G.;Kraft, Arno;Tao, Shanwen;
7:5:68:8     Surfactant-free synthesis and electrochemical properties of chrysanthemum-like InVO4 hierarchical microstructures
DOI:10.1016/j.materresbull.2010.08.019  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:3  AU: Li, Benxia;Wang, Yanfen;
7:5:68:9     Multiferroicity in the geometrically frustrated FeTe2O5Cl
DOI:10.1103/PhysRevB.88.224421  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:5:69:1:1     Observation of quadrupole helix chirality and its domain structure in DyFe3(BO3)(4)
DOI:10.1038/NMAT3942  JN:NATURE MATERIALS  PY:2014
  TC:4  AU: Usui, T.;Tanaka, Y.;Nakajima, H.;Taguchi, M.;Chainani, A.;Oura, M.;Shin, S.;Katayama, N.;Sawa, H.;Wakabayashi, Y.;Kimura, T.;
7:5:69:1:2     Birefringence and polarization rotation in resonant x-ray diffraction
DOI:10.1103/PhysRevB.86.220101  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;
7:5:69:1:3     Determination of structural chirality of berlinite and quartz using resonant x-ray diffraction with circularly polarized x-rays
DOI:10.1103/PhysRevB.81.144104  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Tanaka, Yoshikazu;Kojima, Taro;Takata, Yasutaka;Chainani, Ashish;Lovesey, Stephen W.;Knight, Kevin S.;Takeuchi, Tomoyuki;Oura, Masaki;Senba, Yasunori;Ohashi, Haruhiko;Shin, Shik;
7:5:69:1:4     Resonant x-ray scattering from chiral materials: alpha-quartz and alpha-berlinite
DOI:10.1103/PhysRevB.86.104116  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Igarashi, Jun-ichi;Takahashi, Manabu;
7:5:69:1:5     Chirality, birefringence, and polarization effects in alpha-quartz studied by resonant elastic x-ray scattering
DOI:10.1103/PhysRevB.89.224108  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Joly, Yves;Tanaka, Yoshikazu;Cabaret, Delphine;Collins, Stephen P.;
7:5:69:1:6     Determination of structural chirality of berlinite and quartz using resonant x-ray diffraction with circularly polarized x-rays (vol 81, 144104, 2010)
DOI:10.1103/PhysRevB.84.219905  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Tanaka, Yoshikazu;Kojima, Taro;Takata, Yasutaka;Chainani, Ashish;Lovesey, Stephen W.;Knight, Kevin S.;Takeuchi, Tomoyuki;Oura, Masaki;Senba, Yasunori;Ohashi, Haruhiko;Shin, Shik;
7:5:69:1:7     Flux growth and spin reorientation in trigonal Nd1-xDyxFe3(BO3)(4) single crystals
DOI:10.1016/j.jcrysgro.2010.05.013  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:18  AU: Gudim, I. A.;Eremin, E. V.;Temerov, V. L.;
7:5:69:2:1     Magneto-optical activity of f-f transitions and properties of 4 f states in single-crystal DyFe3(BO3)(4)
DOI:10.1103/PhysRevB.88.075103  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Malakhovskii, A. V.;Sukhachev, A. L.;Strokova, A. Yu.;Gudim, I. A.;
7:5:69:2:2     Magneto-optical spectroscopy of Yb3+ ions in huntite structure
DOI:10.1016/j.jmmm.2009.08.019  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:3  AU: Sukhachev, A. L.;Malakhovskii, A. V.;Edelman, I. S.;Zabluda, V. N.;Temerov, V. L.;Makievskii, I. Ya.;
7:5:69:2:3     Magneto-optical activity and luminescence of f-f transitions in trigonal crystal TmAl3(BO3)(4)
DOI:10.1016/j.optmat.2010.02.023  JN:OPTICAL MATERIALS  PY:2010
  TC:1  AU: Malakhovskii, A. V.;Valley, U. V.;Edelman, I. S.;Sokolov, A. E.;Chesnokov, I. Yu;Gudim, I. A.;
7:5:70:1     Strong enhancement of magnetoelectric coupling in Dy3+ doped HoMnO3
DOI:10.1063/1.4733367  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Magesh, J.;Murugavel, P.;Mangalam, R. V. K.;Singh, K.;Simon, Ch;Prellier, W.;
7:5:70:2     Magnetic excitations in multiferroic LuMnO3 studied by inelastic neutron scattering
DOI:10.1103/PhysRevB.82.184420  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Lewtas, H. J.;Boothroyd, A. T.;Rotter, M.;Prabhakaran, D.;Mueller, H.;Le, M. D.;Roessli, B.;Gavilano, J.;Bourges, P.;
7:5:70:3     Study of magnetodielectric effect in hexagonal Ho1-xDyxMnO3
DOI:10.1063/1.4767380  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Magesh, J.;Murugavel, P.;Mangalam, R. V. K.;Singh, K.;Simon, Ch.;Prellier, W.;
7:5:70:4     Role of rare earth on the Mn3+ spin reorientation in multiferroic Ho1-xLuxMnO3
DOI:10.1063/1.4819969  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Magesh, J.;Murugavel, P.;Mangalam, R. V. K.;Singh, K.;Simon, Ch;Prellier, W.;
7:5:70:5     Oxygen displacements and magnetoelectric coupling in LuMnO3
DOI:10.1103/PhysRevB.86.094419  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Tong, P.;Louca, Despina;Lee, Nara;Cheong, S. -W.;
7:5:70:6     Low-temperature properties of Ca-doped YbMnO3 multiferroic single crystals
DOI:10.1063/1.3556961  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Abramov, N.;Chichkov, V.;Lofland, S. E.;Mukovskii, Y. M.;
7:5:71:1     Mn2FeSbO6: A ferrimagnetic ilmenite and an antiferromagnetic perovskite
DOI:10.1103/PhysRevB.87.014408  JN:PHYSICAL REVIEW B  PY:2013
  TC:6  AU: Mathieu, R.;Ivanov, S. A.;Solovyev, I. V.;Bazuev, G. V.;Kumar, P. Anil;Lazor, P.;Nordblad, P.;
7:5:71:2     Incommensurate spin order in the metallic perovskite MnVO3
DOI:10.1103/PhysRevB.84.094450  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Markkula, Mikael;Arevalo-Lopez, Angel M.;Kusmartseva, Anna;Rodgers, Jennifer A.;Ritter, Clemens;Wu, Hua;Attfield, J. Paul;
7:5:71:3     Investigation of the magnetic phase transition and magnetocaloric properties of the Mn2FeSbO6 ilmenite
DOI:10.1016/j.jmmm.2012.11.040  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:0  AU: Hudl, M.;Mathieu, R.;Nordblad, P.;Ivanov, S. A.;Bazuev, G. V.;Lazor, P.;
7:5:71:4     Weak ferromagnetism and domain effects in multiferroic LiNbO3-type MnTiO3-II
DOI:10.1103/PhysRevB.88.104416  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Arevalo-Lopez, Angel M.;Attfield, J. Paul;
7:5:71:5     Magnetic order near 270 K in mineral and synthetic Mn2FeSbO6 ilmenite
DOI:10.1063/1.3593194  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Mathieu, R.;Ivanov, S. A.;Bazuev, G. V.;Hudl, M.;Lazor, P.;Solovyev, I. V.;Nordblad, P.;
7:5:71:6     Site-Selective Doping Effect in AMn(3)V(4)O(12) (A = Na+, Ca2+, and La3+)
DOI:10.1021/ja308851f  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2013
  TC:6  AU: Zhang, Shoubao;Saito, Takashi;Mizumaki, Masaichiro;Chen, Wei-tin;Tohyama, Takenori;Shimakawa, Yuichi;
7:5:71:7     B-Cation Order Control of Magnetism in the 1322 Perovskite CaCu3Fe2Nb2O12
DOI:10.1021/cm502064b  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:0  AU: Senn, Mark S.;Chen, Wei-tin;Saito, Takashi;Garcia-Martin, Susana;Attfield, J. Paul;Shimakawa, Yuichi;
7:5:72:1     Symmetry analysis of magneto-optical effects: The case of x-ray diffraction and x-ray absorption at the transition metal L-2,L-3 edge
DOI:10.1103/PhysRevB.82.094403  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Haverkort, M. W.;Hollmann, N.;Krug, I. P.;Tanaka, A.;
7:5:72:2     Spin-chiral domains in Ba0.5Sr1.5Zn2Fe12O22 observed by scanning resonant x-ray microdiffraction
DOI:10.1103/PhysRevB.84.064418  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Hiraoka, Y.;Tanaka, Y.;Kojima, T.;Takata, Y.;Oura, M.;Senba, Y.;Ohashi, H.;Wakabayashi, Y.;Shin, S.;Kimura, T.;
7:5:72:3     Circularly polarized soft x-ray diffraction study of helical magnetism in hexaferrite
DOI:10.1103/PhysRevB.81.092405  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Mulders, A. M.;Lawrence, S. M.;Princep, A. J.;Staub, U.;Bodenthin, Y.;Garcia-Fernandez, M.;Garganourakis, M.;Hester, J.;Macquart, R.;Ling, C. D.;
7:5:72:4     Origin of the anomalous low-temperature phase transition in BaVS3
DOI:10.1103/PhysRevB.84.014409  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: de Souza, R. A.;Staub, U.;Scagnoli, V.;Garganourakis, M.;Bodenthin, Y.;Berger, H.;
7:5:72:5     Ground State of the Quasi-1D Compound BaVS3 Resolved by Resonant Magnetic X-Ray Scattering
DOI:10.1103/PhysRevLett.106.167203  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:6  AU: Leininger, Ph.;Ilakovac, V.;Joly, Y.;Schierle, E.;Weschke, E.;Bunau, O.;Berger, H.;Pouget, J. -P.;Foury-Leylekian, P.;
7:5:72:6     Antiferromagnetic domain structure in bilayer manganite
DOI:10.1103/PhysRevB.88.075134  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Garcia-Fernandez, M.;Wilkins, S. B.;Lu, Ming;Li, Qing'an;Gray, K. E.;Zheng, H.;Mitchell, J. F.;Khomskii, Daniel;
7:5:72:7     Antiferromagnetic domain structure in bilayer manganite (vol 88, 075134, 2013)
DOI:10.1103/PhysRevB.88.079905  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Garcia-Fernandez, M.;Wilkins, S. B.;Lu, Ming;Li, Qing'an;Gray, K. E.;Zheng, H.;Mitchell, J. F.;Khomskii, Daniel;
7:5:73:1     Spin dynamics and magnetoelectric properties of the coupled-spin tetrahedral compound Cu2Te2O5Cl2
DOI:10.1103/PhysRevB.90.054418  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Besara, T.;Choi, E. S.;Choi, K. -Y.;Kuhns, P. L.;Reyes, A. P.;Lemmens, P.;Berger, H.;Dalal, N. S.;
7:5:73:2     Weak first-order quantum phase transition in the spin-tetrahedron system Cu2Te2O5Br2 without lattice contributions
DOI:10.1103/PhysRevB.83.134403  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Wang, X.;Syassen, K.;Johnsson, M.;Moessner, R.;Choi, K. -Y.;Lemmens, P.;
7:5:73:3     Unconventional spin freezing in the highly two-dimensional spin-1/2 kagome antiferromagnet Cd2Cu3(OH)(6)(SO4)(24)H2O: Evidence of partial order and coexisting spin singlet state on a distorted kagome lattice
DOI:10.1103/PhysRevB.89.100401  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Fujihala, Masayoshi;Zheng, Xu-Guang;Morodomi, Hiroki;Kawae, Tatsuya;Matsuo, Akira;Kindo, Koichi;Watanabe, Isao;
7:5:73:4     Magnetic transition in K4Cu4OCl10: A model system of three-dimensional spin-1/2 tetrahedra
DOI:10.1103/PhysRevB.87.144425  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Fujihala, Masayoshi;Zheng, Xu-Guang;Morodomi, Hiroki;Kawae, Tatsuya;Watanabe, Isao;
7:5:73:5     NMR and NQR study of the tetrahedral frustrated quantum spin system Cu2Te2O5Br2 in its paramagnetic phase
DOI:10.1103/PhysRevB.82.214416  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Comment, Arnaud;Mayaffre, Hadrien;Mitrovic, Vesna;Horvatic, Mladen;Berthier, Claude;Grenier, Beatrice;Millet, Patrice;
7:5:73:6     Persistence of singlet fluctuations in the coupled spin tetrahedra system Cu2Te2O5Br2 revealed by high-field magnetization, Br-79 NQR, and Te-125 NMR
DOI:10.1103/PhysRevB.86.180405  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal;perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing;parameter on the structural, electronic, and magnetic properties;PHYSICAL REVIEW B;86;23;235117;10.1103/PhysRevB.86.235117;DEC 13 2012;2012;We assess the performance of the Heyd-Scuseria-Ernzerhof (HSE) screened;hybrid density functional scheme applied to the perovskite family LaMO3;(M = Sc-Cu) and discuss the role of the mixing parameter alpha [which;determines the fraction of exact Hartree-Fock exchange included in the;density functional theory (DFT) exchange-correlation functional] on the;structural, electronic, and magnetic properties. The physical complexity;of this class of compounds, manifested by the largely varying electronic;characters (band/Mott-Hubbard/charge-transfer insulators and metals),;magnetic orderings, structural distortions (cooperative Jahn-Teller-type;instabilities), as well as by the strong competition between;localization/delocalization effects associated with the gradual filling;of the t(2g) and e(g) orbitals, symbolize a critical and challenging;case for theory. Our results indicate that HSE is able to provide a;consistent picture of the complex physical scenario encountered across;the LaMO3 series and significantly improve the standard DFT description.;The only exceptions are the correlated paramagnetic metals LaNiO3 and;LaCuO3, which are found to be treated better within DFT. By fitting the;ground-state properties with respect to alpha, we have constructed a set;of "optimum" values of alpha from LaScO3 to LaCuO3: it is found that the;optimum mixing parameter decreases with increasing filling of the d;manifold (LaScO3: 0.25; LaTiO3 and LaVO3: 0.10-0.15; LaCrO3, LaMnO3, and;LaFeO3: 0.15; LaCoO3: 0.05; LaNiO3 and LaCuO3: 0). This trend can be;nicely correlated with the modulation of the screening and dielectric;properties across the LaMO3 series, thus providing a physical;justification to the empirical fitting procedure. Finally, we show that;by using this set of optimum mixing parameter, HSE predict dielectric;constants in very good agreement with the experimental ones.;17;1;1;0;17;1098-0121;WOS:000312291900002;;;J;Imura, Ken-Ichiro;Yoshimura, Yukinori;Takane, Yositake;Fukui, Takahiro;Spherical topological insulator;PHYSICAL REVIEW B;86;23;235119;10.1103/PhysRevB.86.235119;DEC 13 2012;2012;The electronic spectrum on the spherical surface of a topological;insulator reflects an active property of the helical surface state that;stems from a constraint on its spin on a curved surface. The induced;spin connection can be interpreted as an effective vector potential;associated with a fictitious magnetic monopole induced at the center of;the sphere. The strength of the induced magnetic monopole is found to be;g = +/-2 pi, being the smallest finite (absolute) value compatible with;the Dirac quantization condition. We have established an explicit;correspondence between the bulk Hamiltonian and the effective Dirac;operator on the curved spherical surface. An explicit construction of;the surface spinor wave functions implies a rich spin texture possibly;realized on the surface of topological insulator nanoparticles. The;electronic spectrum inferred by the obtained effective surface Dirac;theory, confirmed also by the bulk tight-binding calculation, suggests a;specific photoabsorption/emission spectrum of such nanoparticles.;Imura, Ken/D-6633-2013;6;0;0;0;6;1098-0121;WOS:000312291900004;;;J;Kamburov, D.;Shayegan, M.;Winkler, R.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Anisotropic Fermi contour of (001) GaAs holes in parallel magnetic;fields;PHYSICAL REVIEW B;86;24;241302;10.1103/PhysRevB.86.241302;DEC 13 2012;2012;We report a severe, spin-dependent, Fermi contour anisotropy induced by;parallel magnetic field in a high-mobility (001) GaAs two-dimensional;hole system. Employing commensurability oscillations created by a;unidirectional, surface-strain-induced, periodic potential modulation,;we directly probe the anisotropy of the two spin subband Fermi contours.;Their areas are obtained from the Fourier transform of the Shubnikov-de;Haas oscillations. Our findings are in semiquantitative agreement with;the results of parameter-free calculations of the energy bands. DOI:;10.1103/PhysRevB.86.241302;5;0;0;0;5;1098-0121;WOS:000312292600001;;;J;Kourtis, Stefanos;Venderbos, Joern W. F.;Daghofer, Maria;Fractional Chern insulator on a triangular lattice of strongly;correlated t(2g) electrons;PHYSICAL REVIEW B;86;23;235118;10.1103/PhysRevB.86.235118;DEC 13 2012;2012;We discuss the low-energy limit of three-orbital Kondo-lattice and;Hubbard models describing t(2g) orbitals on a triangular lattice near;half-filling. We analyze how very flat single-particle bands with;nontrivial topological character, a Chern number C = +/-1, arise both in;the limit of infinite on-site interactions as well as in more realistic;regimes. Exact diagonalization is then used to investigate an effective;one-orbital spinless-fermion model at fractional fillings including;nearest-neighbor interaction V; it reveals signatures of fractional;Chern insulator (FCI) states for several filling fractions. In addition;to indications based on energies, e. g., flux insertion and fractional;statistics of quasiholes, Chern numbers are obtained. It is shown that;FCI states are robust against disorder in the underlying magnetic;texture that defines the topological character of the band. We also;investigate competition between a FCI state and a charge density wave;(CDW) and discuss the effects of particle-hole asymmetry and;Fermi-surface nesting. FCI states turn out to be rather robust and do;not require very flat bands, but can also arise when filling or an;absence of Fermi-surface nesting disfavor the competing CDW.;Nevertheless, very flat bands allow FCI states to be induced by weaker;interactions than those needed for more dispersive bands.;Daghofer, Maria/C-5762-2008;Daghofer, Maria/0000-0001-9434-8937;10;0;0;0;10;1098-0121;WOS:000312291900003;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;23;230001;10.1103/PhysRevB.86.230001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312291900001;;;J;Molenkamp, Laurens W.;Editorial: The End of PRB Brief Reports;PHYSICAL REVIEW B;86;21;210001;10.1103/PhysRevB.86.210001;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700001;;;J;Ochoa, H.;Castro Neto, A. H.;Fal'ko, V. I.;Guinea, F.;Spin-orbit coupling assisted by flexural phonons in graphene;PHYSICAL REVIEW B;86;24;245411;10.1103/PhysRevB.86.245411;DEC 13 2012;2012;We analyze the couplings between spins and phonons in graphene. We;present a complete analysis of the possible couplings between spins and;flexural, out-of-plane, vibrations. From tight-binding models, we obtain;analytical and numerical estimates of their strength. We show that;dynamical effects, induced by quantum and thermal fluctuations,;significantly enhance the spin-orbit gap. DOI:;10.1103/PhysRevB.86.245411;Guinea, Francisco/A-7122-2008; Castro Neto, Antonio/C-8363-2014;Guinea, Francisco/0000-0001-5915-5427; Castro Neto,;Antonio/0000-0003-0613-4010;9;1;0;0;9;1098-0121;WOS:000312292600005;;;J;Suewattana, Malliga;Singh, David J.;Limpijumnong, Sukit;Crystal structure and cation off-centering in Bi(Mg1/2Ti1/2)O-3 (vol 86,;064105, 2012);PHYSICAL REVIEW B;86;21;219903;10.1103/PhysRevB.86.219903;DEC 13 2012;2012;0;0;0;0;0;1098-0121;WOS:000312290700002;;;J;Wei, Haiqing;Liu, Shiyuan;Comment on "Three-dimensional imaging of a phase object from a single;sample orientation using an optical laser";PHYSICAL REVIEW B;86;22;226101;10.1103/PhysRevB.86.226101;DEC 13 2012;2012;A recent article by Chen et al. [Phys. Rev. B 84, 224104 (2011)];purports a "matrix rank analysis" and an optical experiment in support;of the three-dimensional (3D) imaging technique called "ankylography.";However, the mathematical analysis does not appear to be conclusive, and;the one used in the experiment is more a 3D-supported scattering object;of actually 2D complexity than a 3D-distributed scattering object of;truly 3D complexity. Consequently, the article provides little support;to the "ankylography" technique. DOI: 10.1103/PhysRevB.86.226101;Liu, Shiyuan/H-1463-2012;Liu, Shiyuan/0000-0002-0756-1439;1;0;0;0;1;1098-0121;WOS:000312291200003;;;J;Bobes, Omar;Zhang, Kun;Hofsaess, Hans;Ion beam induced surface patterns due to mass redistribution and;curvature-dependent sputtering;PHYSICAL REVIEW B;86;23;235414;10.1103/PhysRevB.86.235414;DEC 12 2012;2012;Recently it was reported that ion-induced mass redistribution would;solely determine nano pattern formation on ion-irradiated surfaces. We;investigate the pattern formation on amorphous carbon thin films;irradiated with Xe ions of energies between 200 eV and 10 keV. Sputter;yield as well as number of displacements within the collision cascade;vary strongly as function of ion energy and allow us to investigate the;contributions of curvature-dependent erosion according to the;Bradley-Harper model as well as mass redistribution according to the;Carter-Vishnyakov model. We find parallel ripple orientations for an ion;incidence angle of 60 degrees and for all energies. A transition to;perpendicular pattern orientation or a rather flat surface occurs around;80 degrees for energies between 1 keV and 10 keV. Our results are;compared with calculations based on both models. For the calculations we;extract the shape and size of Sigmund's energy ellipsoid (parameters a,;sigma, mu), the angle-dependent sputter yield, and the mean mass;redistribution distance from the Monte Carlo simulations with program;SDTrimSP. The calculated curvature coefficients S-x and S-y describing;the height evolution of the surface show that mass redistribution is;dominant for parallel pattern formation in the whole energy regime.;Furthermore, the angle where the parallel pattern orientation starts to;disappear is related to curvature-dependent sputtering. In addition, we;investigate the case of Pt erosion with 200 eV Ne ions, where mass;redistribution vanishes. In this case, we observe perpendicular ripple;orientation in accordance with curvature-dependent sputtering and the;predictions of the Bradley-Harper model.;10;0;0;0;10;1098-0121;WOS:000312291600004;;;J;Bradlyn, Barry;Goldstein, Moshe;Read, N.;Kubo formulas for viscosity: Hall viscosity, Ward identities, and the;relation with conductivity;PHYSICAL REVIEW B;86;24;245309;10.1103/PhysRevB.86.245309;DEC 12 2012;2012;Motivated by recent work on Hall viscosity, we derive from first;principles the Kubo formulas for the stress-stress response function at;zero wave vector that can be used to define the full complex;frequency-dependent viscosity tensor, both with and without a uniform;magnetic field. The formulas in the existing literature are frequently;incomplete, incorrect, or lack a derivation; in particular, Hall;viscosity is overlooked. Our approach begins from the response to a;uniform external strain field, which is an active time-dependent;coordinate transformation in d space dimensions. These transformations;form the group GL(d, R) of invertible matrices, and the infinitesimal;generators are called strain generators. These enable us to express the;Kubo formula in different ways, related by Ward identities; some of;these make contact with the adiabatic transport approach. The importance;of retaining contact terms, analogous to the diamagnetic term in the;familiar Kubo formula for conductivity, is emphasized. For;Galilean-invariant systems, we derive a relation between the stress;response tensor and the conductivity tensor that is valid at all;frequencies and in both the presence and absence of a magnetic field. In;the presence of a magnetic field and at low frequency, this yields a;relation between the Hall viscosity, the q(2) part of the Hall;conductivity, the inverse compressibility (suitably defined), and the;diverging part of the shear viscosity (if any); this relation;generalizes a result found recently by others. We show that the correct;value of the Hall viscosity at zero frequency can be obtained (at least;in the absence of low-frequency bulk and shear viscosity) by assuming;that there is an orbital spin per particle that couples to a perturbing;electromagnetic field as a magnetization per particle. We study several;examples as checks on our formulation. We also present formulas for the;stress response that directly generalize the Berry (adiabatic) curvature;expressions for zero-frequency Hall conductivity or viscosity to the;full tensors at all frequencies. DOI: 10.1103/PhysRevB.86.245309;Read, Nicholas/J-6030-2012;21;0;0;0;21;1098-0121;WOS:000312292400010;;;J;Calvo, Hernan L.;Classen, Laura;Splettstoesser, Janine;Wegewijs, Maarten R.;Interaction-induced charge and spin pumping through a quantum dot at;finite bias;PHYSICAL REVIEW B;86;24;245308;10.1103/PhysRevB.86.245308;DEC 12 2012;2012;We investigate charge and spin transport through an adiabatically;driven, strongly interacting quantum dot weakly coupled to two metallic;contacts with finite bias voltage. Within a kinetic equation approach,;we identify coefficients of response to the time-dependent external;driving and relate these to the concepts of charge and spin emissivities;previously discussed within the time-dependent scattering matrix;approach. Expressed in terms of auxiliary vector fields, the response;coefficients allow for a straightforward analysis of recently predicted;interaction-induced pumping under periodic modulation of the gate and;bias voltage [Reckermann et al., Phys. Rev. Lett. 104, 226803 (2010)].;We perform a detailed study of this effect and the related adiabatic;Coulomb blockade spectroscopy, and, in particular, extend it to spin;pumping. Analytic formulas for the pumped charge and spin in the regimes;of small and large driving amplitude are provided for arbitrary bias. In;the absence of a magnetic field, we obtain a striking, simple relation;between the pumped charge at zero bias and at bias equal to the Coulomb;charging energy. At finite magnetic field, there is a possibility to;have interaction-induced pure spin pumping at this finite bias value,;and generally, additional features appear in the pumped charge. For;large-amplitude adiabatic driving, the magnitude of both the pumped;charge and spin at the various resonances saturates at values which are;independent of the specific shape of the pumping cycle. Each of these;values provides an independent, quantitative measure of the junction;asymmetry. DOI: 10.1103/PhysRevB.86.245308;Calvo, Hernan/D-9825-2011; Wegewijs, Maarten/A-3512-2012; Splettstoesser, Janine/B-4003-2012;Wegewijs, Maarten/0000-0002-2972-3822;;6;0;1;0;6;1098-0121;WOS:000312292400009;;;J;Drummond, David;Pryadko, Leonid P.;Shtengel, Kirill;Suppression of hyperfine dephasing by spatial exchange of double quantum;dots;PHYSICAL REVIEW B;86;24;245307;10.1103/PhysRevB.86.245307;DEC 12 2012;2012;We examine the logical qubit system of a pair of electron spins in;double quantum dots. Each electron experiences a different hyperfine;interaction with the local nuclei of the lattice, leading to a relative;phase difference, and thus decoherence. Methods such as nuclei;polarization, state narrowing, and spin-echo pulses have been proposed;to delay decoherence. Instead we propose to suppress hyperfine dephasing;by the adiabatic rotation of the dots in real space, leading to the same;average hyperfine interaction. We show that the additional effects due;to the motion in the presence of spin-orbit coupling are still smaller;than the hyperfine interaction, and result in an infidelity below 10(-4);after ten decoupling cycles. We discuss a possible experimental setup;and physical constraints for this proposal. DOI:;10.1103/PhysRevB.86.245307;0;0;0;0;0;1098-0121;WOS:000312292400008;;;J;Estienne, B.;Regnault, N.;Bernevig, B. A.;D-algebra structure of topological insulators;PHYSICAL REVIEW B;86;24;241104;10.1103/PhysRevB.86.241104;DEC 12 2012;2012;In the quantum Hall effect, the density operators at different wave;vectors generally do not commute and give rise to the Girvin-MacDonald-;Plazmann (GMP) algebra, with important consequences such as ground-state;center-of-mass degeneracy at fractional filling fraction, and;W1+infinity symmetry of the filled Landau levels. We show that the;natural generalization of the GMP algebra to higher-dimensional;topological insulators involves the concept of a D commutator. For;insulators in even-dimensional space, the D commutator is isotropic and;closes, and its structure factors are proportional to the D/2 Chern;number. In odd dimensions, the algebra is not isotropic, contains the;weak topological insulator index (layers of the topological insulator in;one fewer dimension), and does not contain the Chern-Simons theta form.;This algebraic structure paves the way towards the identification of;fractional topological insulators through the counting of their;excitations. The possible relation to D-dimensional volume-preserving;diffeomorphisms and parallel transport of extended objects is also;discussed. DOI: 10.1103/PhysRevB.86.241104;7;0;0;0;7;1098-0121;WOS:000312292400001;;;J;Gingrich, E. C.;Quarterman, P.;Wang, Yixing;Loloee, R.;Pratt, W. P., Jr.;Birge, Norman O.;Spin-triplet supercurrent in Co/Ni multilayer Josephson junctions with;perpendicular anisotropy;PHYSICAL REVIEW B;86;22;224506;10.1103/PhysRevB.86.224506;DEC 12 2012;2012;We have measured spin-triplet supercurrent in Josephson junctions of the;form S/F'/F/F'/S, where S is superconducting Nb, F' is a thin Ni layer;with in-plane magnetization, and F is a Ni/[Co/Ni](n) multilayer with;out-of-plane magnetization. The supercurrent in these junctions decays;very slowly with F-layer thickness and is much larger than in similar;junctions not containing the two F' layers. Those two features are the;characteristic signatures of spin-triplet supercurrent, which is;maximized by the orthogonality of the magnetizations in the F and F';layers. Magnetic measurements confirm the out-of-plane anisotropy of the;Co/Ni multilayers. These samples have their critical current optimized;in the as-prepared state, which will be useful for future applications.;DOI: 10.1103/PhysRevB.86.224506;7;1;0;0;7;1098-0121;WOS:000312291100001;;;J;Golub, Anatoly;Grosfeld, Eytan;Charge resistance in a Majorana RC circuit;PHYSICAL REVIEW B;86;24;241105;10.1103/PhysRevB.86.241105;DEC 12 2012;2012;We investigate the dynamical charge response in a "Majorana Coulomb box";realized by two Majorana bound states hosted at the ends of a mesoscopic;topological superconductor. One side of the wire is coupled to a normal;lead and low frequency gate voltage is applied to the system. There is;no dc current; the system can be considered as an RC quantum circuit. We;calculate the effective capacitance and charge relaxation resistance.;The latter is in agreement with the Korringa-Shiba formula where,;however, the charge relaxation resistance is equal to h/2e(2). This;value corresponds to the strong Coulomb blockade limit described by a;resonant model formulated by Fu [Phys. Rev. Lett. 104, 056402 (2010)].;We also performed direct calculations using the latter model and defined;its parameters by direct comparison with our perturbation theory;results. DOI: 10.1103/PhysRevB.86.241105;4;1;0;0;4;1098-0121;WOS:000312292400002;;;J;Guenter, T.;Rubano, A.;Paparo, D.;Lilienblum, M.;Marrucci, L.;Granozio, F. Miletto;di Uccio, U. Scotti;Jany, R.;Richter, C.;Mannhart, J.;Fiebig, M.;Spatial inhomogeneities at the LaAlO3/SrTiO3 interface: Evidence from;second harmonic generation;PHYSICAL REVIEW B;86;23;235418;10.1103/PhysRevB.86.235418;DEC 12 2012;2012;Phase-sensitive, spatially resolved optical second-harmonic-generation;experiments were performed on LaAlO3/SrTiO3 heterostructures. Lateral;inhomogeneities on a length scale of approximate to 30 mu m are found;when a one-unit-cell-thick epitaxial monolayer of LaAlO3 is grown on;TiO2-terminated SrTiO3 single crystals. The inhomogeneity is absent in;samples with LaAlO3 layers of more than one unit cell. The results are;discussed in the framework of electronic, oxidic, and chemical;inhomogeneities.;Marrucci, Lorenzo/A-4331-2012; Richter, Christoph/A-6172-2013;Marrucci, Lorenzo/0000-0002-1154-8966; Richter,;Christoph/0000-0002-6591-1118;7;0;0;0;7;1098-0121;WOS:000312291600008;;;J;Huang, Zhoushen;Arovas, Daniel P.;Entanglement spectrum and Wannier center flow of the Hofstadter problem;PHYSICAL REVIEW B;86;24;245109;10.1103/PhysRevB.86.245109;DEC 12 2012;2012;We examine the quantum entanglement spectra and Wannier functions of the;square lattice Hofstadter model. Consistent with previous work on;entanglement spectra of topological band structures, we find that the;entanglement levels exhibit a spectral flow similar to that of the full;system's energy spectrum. While the energy spectra are continuous, with;cylindrical boundary conditions the entanglement spectra exhibit;discontinuities associated with the passage of an energy edge state;through the Fermi level. We show how the entanglement spectrum can be;understood by examining the band projectors of the full system and their;behavior under adiabatic pumping. In so doing we make connections with;the original work by Thouless, Kohmoto, Nightingale, and den Nijs (TKNN);[Phys. Rev. Lett. 49, 405 (1982)] on topological two-dimensional band;structures and their Chern numbers. Finally, we consider Wannier states;and their adiabatic flows and draw connections to the entanglement;properties. DOI: 10.1103/PhysRevB.86.245109;5;0;0;0;5;1098-0121;WOS:000312292400003;;;J;Humeniuk, Stephan;Roscilde, Tommaso;Quantum Monte Carlo calculation of entanglement Renyi entropies for;generic quantum systems;PHYSICAL REVIEW B;86;23;235116;10.1103/PhysRevB.86.235116;DEC 12 2012;2012;We present a general scheme for the calculation of the Renyi entropy of;a subsystem in quantum many-body models that can be efficiently;simulated via quantum Monte Carlo. When the simulation is performed at;very low temperature, the above approach delivers the entanglement Renyi;entropy of the subsystem, and it allows us to explore the crossover to;the thermal Renyi entropy as the temperature is increased. We implement;this scheme explicitly within the stochastic series expansion as well as;within path-integral Monte Carlo, and apply it to quantum spin and;quantum rotor models. In the case of quantum spins, we show that;relevant models in two dimensions with reduced symmetry (XX model or;hard-core bosons, transverse-field Ising model at the quantum critical;point) exhibit an area law for the scaling of the entanglement entropy.;23;0;0;0;23;1098-0121;WOS:000312291600002;;;J;Jacobs, Th;Katterwe, S. O.;Motzkau, H.;Rydh, A.;Maljuk, A.;Helm, T.;Putzke, C.;Kampert, E.;Kartsovnik, M. V.;Krasnov, V. M.;Electron-tunneling measurements of low-T-c single-layer;Bi2+xSr2-yCuO6+delta: Evidence for a scaling disparity between;superconducting and pseudogap states;PHYSICAL REVIEW B;86;21;214506;10.1103/PhysRevB.86.214506;DEC 12 2012;2012;We experimentally study intrinsic tunneling and high magnetic field (up;to 65 T) transport characteristics of the single-layer cuprate;Bi2+xSr2-yCuO6+delta, with a very low superconducting critical;temperature T-c less than or similar to 4 K. It is observed that the;superconducting gap, the collective bosonic mode energy, the upper;critical field, and the fluctuation temperature range are scaling down;with T-c, while the corresponding pseudogap characteristics remain the;same as in high-T-c cuprates with 20 to 30 times higher T-c. The;observed disparity of the superconducting and pseudogap scales clearly;reveals their different origins. DOI: 10.1103/PhysRevB.86.214506;Kartsovnik, Mark/E-3598-2013; Rydh, Andreas/A-7068-2012;Kartsovnik, Mark/0000-0002-3011-0169; Rydh, Andreas/0000-0001-6641-4861;4;1;0;0;4;1098-0121;WOS:000312290600002;;;J;Klinovaja, Jelena;Ferreira, Gerson J.;Loss, Daniel;Helical states in curved bilayer graphene;PHYSICAL REVIEW B;86;23;235416;10.1103/PhysRevB.86.235416;DEC 12 2012;2012;We study spin effects of quantum wires formed in bilayer graphene by;electrostatic confinement. With a proper choice of the confinement;direction, we show that in the presence of magnetic field, spin orbit;interaction induced by curvature, and intervalley scattering, bound;states emerge that are helical. The localization length of these helical;states can be modulated by the gate voltage which enables the control of;the tunnel coupling between two parallel wires. Allowing for proximity;effect via an s-wave superconductor, we show that the helical modes give;rise to Majorana fermions in bilayer graphene.;J. Ferreira, Gerson/K-1948-2013; Klinovaja, Jelena/L-2510-2013; Loss, Daniel/A-3721-2008;J. Ferreira, Gerson/0000-0002-4933-3119; Loss,;Daniel/0000-0001-5176-3073;17;0;0;0;17;1098-0121;WOS:000312291600006;;;J;Lee, Wei-Cheng;Phillips, Philip W.;Non-Fermi liquid due to orbital fluctuations in iron pnictide;superconductors;PHYSICAL REVIEW B;86;24;245113;10.1103/PhysRevB.86.245113;DEC 12 2012;2012;We study the influence of quantum fluctuations on the electron;self-energy in the normal state of iron pnictide superconductors using a;five-orbital tight-binding model with generalized Hubbard on-site;interactions. Within a one-loop treatment, we find that an overdamped;collective mode develops at low frequency in channels associated with;quasi-one-dimensional d(xz) and d(yz) bands. When the critical point for;the C-4-symmetry-broken phase (structural phase transition) is;approached, the overdamped collective modes soften, and acquire;increased spectral weight, resulting in non-Fermi-liquid behavior at the;Fermi surface characterized by a frequency dependence of the imaginary;part of the electron self-energy of the form. omega(lambda), 0 < lambda;< 1. We argue that this non-Fermi-liquid behavior is responsible for the;recently observed zero-bias enhancement in the tunneling signal in;point-contact spectroscopy. A key experimental test of this proposal is;the absence of non-Fermi-liquid behavior in the hole-doped materials.;Our result suggests that quantum criticality plays an important role in;understanding the normal-state properties of iron pnictide;superconductors. DOI: 10.1103/PhysRevB.86.245113;11;0;0;0;11;1098-0121;WOS:000312292400007;;;J;McKenna, Keith P.;Blumberger, Jochen;Crossover from incoherent to coherent electron tunneling between defects;in MgO;PHYSICAL REVIEW B;86;24;245110;10.1103/PhysRevB.86.245110;DEC 12 2012;2012;Long-range electron tunneling is a fundamental process that is critical;to the performance of oxide materials in microelectronics, energy;generation, and photocatalysis, but extremely challenging to probe;experimentally. Here we devise a computational approach that allows one;to probe the mechanism and calculate the rate of electron transfer (ET);in such materials from first principles. Application to ET between;defects in MgO reveals that the activation energy for ET depends;strongly on defect separation, an effect not usually taken into account;in semiempirical models of ET processes in oxides. Importantly, for;distances below a critical defect separation (6 angstrom), the nature of;ET changes from incoherent to coherent tunneling, suggesting that;existing empirical models require essential modifications. These;calculations extend first-principles modeling of ET in oxides to the;regime of long-range incoherent transport, an outstanding problem;important for modeling many processes of technological relevance. DOI:;10.1103/PhysRevB.86.245110;Blumberger, Jochen/L-5949-2013; McKenna, Keith/A-5084-2010;6;1;0;0;6;1098-0121;WOS:000312292400004;;;J;Mol, L. A. S.;Pereira, A. R.;Moura-Melo, W. A.;Extending spin ice concepts to another geometry: The artificial;triangular spin ice (vol 85, 184410, 2012);PHYSICAL REVIEW B;86;21;219902;10.1103/PhysRevB.86.219902;DEC 12 2012;2012;Mol, Lucas/D-9575-2013;Mol, Lucas/0000-0002-5001-0499;0;0;0;0;0;1098-0121;WOS:000312290600003;;;J;Palotas, Krisztian;Mandi, Gabor;Szunyogh, Laszlo;Orbital-dependent electron tunneling within the atom superposition;approach: Theory and application to W(110);PHYSICAL REVIEW B;86;23;235415;10.1103/PhysRevB.86.235415;DEC 12 2012;2012;We introduce an orbital-dependent electron tunneling model and implement;it within the atom superposition approach for simulating scanning;tunneling microscopy (STM) and spectroscopy (STS). Applying our method,;we analyze the convergence and the orbital contributions to the;tunneling current and the corrugation of constant-current STM images;above the W(110) surface. In accordance with a previous study [Heinze et;al., Phys. Rev. B 58, 16432 (1998)], we find atomic contrast reversal;depending on the bias voltage. Additionally, we analyze this effect;depending on the tip-sample distance using different tip models and find;two qualitatively different behaviors based on the tip orbital;composition. As an explanation, we highlight the role of the real-space;shape of the orbitals involved in the tunneling. STM images calculated;by our model agree well with those obtained using Tersoff and Hamann's;and Bardeen's approaches. The computational efficiency of our model is;remarkable as the k-point samplings of the surface and tip Brillouin;zones do not affect the computation time, in contrast to the Bardeen;method.;Palotas, Krisztian/C-5338-2009;5;0;0;0;5;1098-0121;WOS:000312291600005;;;J;Rodrigues, J. N. B.;Peres, N. M. R.;Lopes dos Santos, J. M. B.;Scattering by linear defects in graphene: A continuum approach;PHYSICAL REVIEW B;86;21;214206;10.1103/PhysRevB.86.214206;DEC 12 2012;2012;We study the low-energy electronic transport across periodic extended;defects in graphene. In the continuum low-energy limit, such defects act;as infinitessimally thin stripes separating two regions where the Dirac;Hamiltonian governs the low-energy phenomena. The behavior of these;systems is defined by the boundary condition imposed by the defect on;the massless Dirac fermions. We demonstrate how this low-energy boundary;condition can be computed from the tight-binding model of the defect;line. For simplicity we consider defect lines oriented along the zigzag;direction, which requires the consideration of only one copy of the;Dirac equation. Three defect lines of this kind are studied and shown to;be mappable between them: the pentagon-only, the zz(558), and the;zz(5757) defect lines. In addition, in this same limit, we calculate the;conductance across such defect lines with size L and find it to be;proportional to k(F)L at low temperatures. DOI:;10.1103/PhysRevB.86.214206;6;0;0;0;6;1098-0121;WOS:000312290600001;;;J;Saloriutta, Karri;Uppstu, Andreas;Harju, Ari;Puska, Martti J.;Ab initio transport fingerprints for resonant scattering in graphene;PHYSICAL REVIEW B;86;23;235417;10.1103/PhysRevB.86.235417;DEC 12 2012;2012;We have recently shown that by using a scaling approach for randomly;distributed topological defects in graphene, reliable estimates for;transmission properties of macroscopic samples can be calculated based;even on single-defect calculations [A. Uppstu et al., Phys. Rev. B 85,;041401 (2012)]. We now extend this approach of energy-dependent;scattering cross sections to the case of adsorbates on graphene by;studying hydrogen and carbon adatoms as well as epoxide and hydroxyl;groups. We show that a qualitative understanding of resonant scattering;can be gained through density functional theory results for a;single-defect system, providing a transmission "fingerprint";characterizing each adsorbate type. This information can be used to;reliably predict the elastic mean free path for moderate defect;densities directly using ab initio methods. We present tight-binding;parameters for carbon and epoxide adsorbates, obtained to match the;density-functional theory based scattering cross sections.;Puska, Martti/E-7362-2012; Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;4;0;0;0;4;1098-0121;WOS:000312291600007;;;J;Schuster, R.;Pyon, S.;Knupfer, M.;Azuma, M.;Takano, M.;Takagi, H.;Buechner, B.;Angle-dependent spectral weight transfer and evidence of a;symmetry-broken in-plane charge response in Ca1.9Na0.1CuO2Cl2;PHYSICAL REVIEW B;86;24;245112;10.1103/PhysRevB.86.245112;DEC 12 2012;2012;We report about the energy and momentum dependent charge response in;Ca1.9Na0.1CuO2Cl2 employing electron energy-loss spectroscopy. Along the;diagonal of the Brillouin zone (BZ) we find a plasmon peak-indicating;the presence of metallic states in this momentum region-which emerges as;a consequence of substantial spectral-weight transfer from excitations;across the charge-transfer (CT) gap and is the two-particle;manifestation of the small Fermi pocket or arc observed with;photoemission in this part of the BZ. In contrast, the spectrum along;the [100] direction is almost entirely dominated by CT excitations,;reminiscent of the insulating parent compound. We argue that the;observed polarization dependent shape of the spectrum is suggestive of a;breaking of the underlying tetragonal lattice symmetry, possibly due to;fluctuating nematic order in the charge channel. In addition we find the;plasmon bandwidth to be suppressed compared to optimally doped cuprates.;DOI: 10.1103/PhysRevB.86.245112;Takagi, Hidenori/B-2935-2010; PYON, Sunseng/B-2618-2011; Azuma, Masaki/C-2945-2009;0;0;0;0;0;1098-0121;WOS:000312292400006;;;J;Swingle, Brian;Experimental signatures of three-dimensional fractional topological;insulators;PHYSICAL REVIEW B;86;24;245111;10.1103/PhysRevB.86.245111;DEC 12 2012;2012;In this paper we explore experimental signatures of fractional;topological insulators in three dimensions. These are states of matter;with a fully gapped bulk that host exotic gapless surface states and;fractionally charged quasiparticles. They are partially characterized by;a nontrivial magneto-electric response while preserving time reversal.;We describe how these phases appear in a variety of probes including;photoemmission, tunneling, and quantum oscillations. We also discuss the;effects of doping and proximate superconductivity. We argue that despite;our current theoretical inability to predict materials where such phases;will be realized, they should be relatively easy to detect;experimentally. DOI:10.1103/PhysRevB.86.245111;0;0;0;0;0;1098-0121;WOS:000312292400005;;;J;Thomas, Mark;Romito, Alessandro;Decoherence effects on weak value measurements in double quantum dots;PHYSICAL REVIEW B;86;23;235419;10.1103/PhysRevB.86.235419;DEC 12 2012;2012;We study the effect of decoherence on a weak value measurement in a;paradigm system consisting of a double quantum dot continuously measured;by a quantum point contact. Fluctuations of the parameters controlling;the dot state induce decoherence. We find that, for measurements longer;than the decoherence time, weak values are always reduced within the;range of the eigenvalues of the measured observable. For measurements at;shorter time scales, the measured weak value strongly depends on the;interplay between the decoherence dynamics of the system and the;detector backaction. In particular, depending on the postselected state;and the strength of the decoherence, a more frequent classical readout;of the detector might lead to an enhancement of weak values.;Romito, Alessandro/L-3564-2013;Romito, Alessandro/0000-0003-3082-6279;1;0;0;0;1;1098-0121;WOS:000312291600009;;;J;Witczak-Krempa, William;Sachdev, Subir;Quasinormal modes of quantum criticality;PHYSICAL REVIEW B;86;23;235115;10.1103/PhysRevB.86.235115;DEC 12 2012;2012;We study charge transport of quantum critical points described by;conformal field theories in 2 + 1 space-time dimensions. The transport;is described by an effective field theory on an asymptotically anti-de;Sitter space-time, expanded to fourth order in spatial and temporal;gradients. The presence of a horizon at nonzero temperatures implies;that this theory has quasinormal modes with complex frequencies. The;quasinormal modes determine the poles and zeros of the conductivity in;the complex frequency plane, and so fully determine its behavior on the;real frequency axis, at frequencies both smaller and larger than the;absolute temperature. We describe the role of particle-vortex or S;duality on the conductivity, specifically how it maps poles to zeros and;vice versa. These analyses motivate two sum rules obeyed by the quantum;critical conductivity: the holographic computations are the first to;satisfy both sum rules, while earlier Boltzmann-theory computations;satisfy only one of them. Finally, we compare our results with the;analytic structure of the O(N) model in the large-N limit, and other;CFTs.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;13;0;0;0;13;1098-0121;WOS:000312291600001;;;J;Zielke, Robert;Braunecker, Bernd;Loss, Daniel;Cotunneling in the v=5/2 fractional quantum Hall regime;PHYSICAL REVIEW B;86;23;235307;10.1103/PhysRevB.86.235307;DEC 12 2012;2012;We show that cotunneling in the 5/2 fractional quantum Hall regime;allows us to test the Moore-Read wave function, proposed for this;regime, and to probe the nature of the fractional charge carriers. We;calculate the cotunneling current for electrons that tunnel between two;quantum Hall edge states via a quantum dot and for quasiparticles with;fractional charges e/4 and e/2 that tunnel via an antidot. While;electron cotunneling is strongly suppressed, the quasiparticle tunneling;shows signatures characteristic of the Moore-Read state. For comparison,;we also consider cotunneling between Laughlin states, and find that;electron transport between Moore-Read states and between Laughlin states;at filling factor 1/3 have identical voltage dependences.;Loss, Daniel/A-3721-2008;Loss, Daniel/0000-0001-5176-3073;0;0;0;0;0;1098-0121;WOS:000312291600003;;;J;de Andres, P. L.;Guinea, F.;Katsnelson, M. I.;Density functional theory analysis of flexural modes, elastic constants,;and corrugations in strained graphene;PHYSICAL REVIEW B;86;24;245409;10.1103/PhysRevB.86.245409;DEC 11 2012;2012;Ab initio density functional theory has been used to analyze flexural;modes, elastic constants, and atomic corrugations on single-and bi-layer;graphene. Frequencies of flexural modes are sensitive to compressive;stress; its variation under stress can be related to the anomalous;thermal expansion via a simple model based in classical elasticity;theory [P. L. de Andres, F. Guinea, and M. I. Katsnelson, Phys. Rev. B;86, 144103 (2012)]. Under compression, flexural modes are responsible;for a long-wavelength rippling with a large amplitude and a marked;anharmonic behavior. This is compared with corrugations created by;thermal fluctuations and the adsorption of a light impurity (hydrogen).;Typical values for the later are in the sub-Angstrom regime, while;maximum corrugations associated to bending modes quickly increase up to;a few Angstroms under a compressive stress, due to the intrinsic;instability of flexural modes. DOI: 10.1103/PhysRevB.86.245409;Katsnelson, Mikhail/D-4359-2012; Guinea, Francisco/A-7122-2008; de Andres, Pedro/B-2043-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Guinea, Francisco/0000-0001-5915-5427;;8;1;0;0;8;1098-0121;WOS:000312292100004;;;J;Glaessl, M.;Axt, V. M.;Polarization dependence of phonon influences in exciton-biexciton;quantum dot systems;PHYSICAL REVIEW B;86;24;245306;10.1103/PhysRevB.86.245306;DEC 11 2012;2012;We report on a strong dependence of the phonon-induced damping of Rabi;dynamics in an optically driven exciton-biexciton quantum dot system on;the polarization of the exciting pulse. While for a fixed pulse;intensity the damping is maximal for linearly polarized excitation, it;decreases with increasing ellipticity of the polarization. This finding;is most remarkable considering that the carrier-phonon coupling is spin;independent. In addition to simulations based on a numerically exact;real-time path-integral approach, we present an analysis within a;weak-coupling theory that allows for analytical expressions for the;pertinent damping rates. We demonstrate that an efficient coupling to;the biexciton state is of central importance for the reported;polarization dependencies. Further, we discuss influences of various;system parameters and show that, for finite biexciton binding energies,;Rabi scenarios differ qualitatively from the widely studied two-level;dynamics. DOI: 10.1103/PhysRevB.86.245306;2;0;0;0;2;1098-0121;WOS:000312292100003;;;J;Ishioka, J.;Fujii, T.;Katono, K.;Ichimura, K.;Kurosawa, T.;Oda, M.;Tanda, S.;Reply to "Comment on 'Charge-parity symmetry observed through Friedel;oscillations in chiral charge-density waves' ";PHYSICAL REVIEW B;86;24;247102;10.1103/PhysRevB.86.247102;DEC 11 2012;2012;We are responding to the Comment by J. Wezel on our paper. This study;was developed from our previous work [Ishioka et al., Phys. Rev. Lett.;105, 176401 (2010)]. In the PRL paper, H-CDW was defined as a new;parameter for expressing CDW chirality for the first time. In his;Comment, he claims that H-CDW is ill defined. He also claims that the;initial phase phi of the CDW wave function is a more appropriate;parameter for expressing chiral CDW, despite our early introduction of;phi to explain the experimental data described in the PRL paper.;However, we conclude that H-CDW can distinguish the CDW chirality by its;sign. Moreover, by considering different H-CDW signs, we had succeeded;in demonstrating the difference of the spatial distributions of CDWs as;shown in Fig. 4 of the PRB paper [Phys. Rev. B 84, 245125 (2011)]. In;our Reply, we discuss the validity of H-CDW. We show that his argument;regarding the identification of the CDW with the opposite sign of q is;wrong, since the logic is inapplicable to a wave function with a nonzero;phi. We also discuss the applicability of H-CDW to two- or;three-dimensional CDWs in transition metal dichalcogenides. DOI:;10.1103/PhysRevB.86.247102;0;0;0;0;0;1098-0121;WOS:000312292100007;;;J;Kallos, Efthymios;Chremmos, Ioannis;Yannopapas, Vassilios;Resonance properties of optical all-dielectric metamaterials using;two-dimensional multipole expansion;PHYSICAL REVIEW B;86;24;245108;10.1103/PhysRevB.86.245108;DEC 11 2012;2012;We examine the electromagnetic response of metamaterial unit elements;consisting of dielectric rods embedded in a nonmagnetic background;medium. We establish a theoretical framework in which the response is;described through the electric and magnetic multipole moments that are;simultaneously generated via the polarization currents that are excited;upon the incidence of plane waves. The corresponding dipole and;quadrupole polarizabilities are then calculated as a function of the Mie;scattering coefficients, and their resonances are mapped for the case of;dielectric cylindrical rods as a function of the geometry and the;material parameters used. The results provide critical insight into the;anisotropic response of two-dimensional rod-type metamaterials and can;be used as a unified methodology in the calculation of exotic effective;electromagnetic parameters involved in phenomena such as optical;magnetism. DOI: 10.1103/PhysRevB.86.245108;5;0;0;0;5;1098-0121;WOS:000312292100001;;;J;Lim, Linda Y.;Lany, Stephan;Chang, Young Jun;Rotenberg, Eli;Zunger, Alex;Toney, Michael F.;Angle-resolved photoemission and quasiparticle calculation of ZnO: The;need for d band shift in oxide semiconductors;PHYSICAL REVIEW B;86;23;235113;10.1103/PhysRevB.86.235113;DEC 11 2012;2012;ZnO is a prototypical semiconductor with occupied d(10) bands that;interact with the anion p states and is thus challenging for electronic;structure theories. Within the context of these theories, incomplete;cancellation of the self-interaction energy results in a Zn d band that;is too high in energy, resulting in upwards repulsion of the valence;band maximum (VBM) states, and an unphysical reduction of the band gap.;Methods such as GW should significantly reduce the self-interaction;error, and in order to evaluate such calculations, we measured;high-resolution and resonant angle-resolved photoemission spectroscopy;(ARPES) and compared these to several electronic structure calculations.;We find that, in a standard GW calculation, the d bands remain too high;in energy by more than 1 eV irrespective of the Hamiltonian used for;generating the input wave functions, causing a slight underestimation of;the band gap due to the p-d repulsion. We show that a good agreement;with the ARPES data over the full valence band spectrum is obtained,;when the Zn-d band energy is shifted down by applying an on-site;potential V-d for Zn-d states during the GW calculations to match the;measured d band position. The magnitude of the GW quasiparticle energy;shift relative to the initial density functional calculation is of;importance for the prediction of charged defect formation energies,;band-offsets, and ionization potentials. DOI: 10.1103/PhysRevB.86.235113;Zunger, Alex/A-6733-2013; Lim, Ying Wen Linda/A-8608-2012; Rotenberg, Eli/B-3700-2009; Chang, Young Jun/N-3440-2014;Rotenberg, Eli/0000-0002-3979-8844; Chang, Young Jun/0000-0001-5538-0643;15;0;0;0;15;1098-0121;WOS:000312291700002;;;J;Liu, Tao;Lee, Kenneth E.;Wang, Qi Jie;Microscopic density matrix model for optical gain of terahertz quantum;cascade lasers: Many-body, nonparabolicity, and resonant tunneling;effects;PHYSICAL REVIEW B;86;23;235306;10.1103/PhysRevB.86.235306;DEC 11 2012;2012;Intersubband semiconductor-Bloch equations are investigated by;incorporating many-body Coulomb interaction, nonparabolicity, and;coherence of resonant tunneling transport in a quantitative way based on;the density matrix theory. The calculations demonstrate the importance;of these parameters on optical properties, especially the optical gain;spectrum, of terahertz (THz) quantum cascade lasers (QCLs). The results;show that the lasing frequency at gain peak calculated by the proposed;microscopic density matrix model is closer to the experimentally;measured result, compared with that calculated by the existing;macroscopic density matrix model. Specifically, both the many-body;interaction and nonparabolicity effects red-shift the gain spectrum and;reduce the gain peak. In addition, as the injection-coupling strength;increases, the gain peak value is enhanced and the spectrum is slightly;broadened, while an increase of the extraction-coupling strength reduces;the gain peak value and broadens the gain spectrum. The dependence of;optical gain of THz QCLs on device parameters such as external;electrical bias, dephasing rate, doping density, and temperature is also;systematically studied in details. This model provides a more;comprehensive picture of the optical properties of THz QCLs from a;microscopic point of view and potentially enables a more accurate and;faster prediction and calculation of the device performance, e. g., gain;spectra, current-voltage characteristics, optical output powers, and;nonlinear amplitude-phase coupling. DOI: 10.1103/PhysRevB.86.235306;Wang, Qi Jie/E-6987-2010;5;0;0;0;5;1098-0121;WOS:000312291700004;;;J;Pedersen, Jesper Goor;Gunst, Tue;Markussen, Troels;Pedersen, Thomas Garm;Graphene antidot lattice waveguides;PHYSICAL REVIEW B;86;24;245410;10.1103/PhysRevB.86.245410;DEC 11 2012;2012;We introduce graphene antidot lattice waveguides: nanostructured;graphene where a region of pristine graphene is sandwiched between;regions of graphene antidot lattices. The band gaps in the surrounding;antidot lattices enable localized states to emerge in the central;waveguide region. We model the waveguides via a position-dependent mass;term in the Dirac approximation of graphene and arrive at analytical;results for the dispersion relation and spinor eigenstates of the;localized waveguide modes. To include atomistic details we also use a;tight-binding model, which is in excellent agreement with the analytical;results. The waveguides resemble graphene nanoribbons, but without the;particular properties of ribbons that emerge due to the details of the;edge. We show that electrons can be guided through kinks without;additional resistance and that transport through the waveguides is;robust against structural disorder. DOI: 10.1103/PhysRevB.86.245410;Goor Pedersen, Jesper/C-3965-2008; Gunst, Tue/C-6575-2013; Markussen, Troels/B-7800-2012;Goor Pedersen, Jesper/0000-0002-8411-240X; Gunst,;Tue/0000-0002-3000-5940; Markussen, Troels/0000-0003-1192-4025;9;0;0;0;9;1098-0121;WOS:000312292100005;;;J;Ramos, J. G. G. S.;Barbosa, A. L. R.;Bazeia, D.;Hussein, M. S.;Lewenkopf, C. H.;Generalized correlation functions for conductance fluctuations and the;mesoscopic spin Hall effect;PHYSICAL REVIEW B;86;23;235112;10.1103/PhysRevB.86.235112;DEC 11 2012;2012;We study the spin Hall conductance fluctuations in ballistic mesoscopic;systems. We obtain universal expressions for the spin and charge current;fluctuations, cast in terms of current-current autocorrelation;functions. We show that the latter are conveniently parametrized as;deformed Lorentzian shape lines, functions of an external applied;magnetic field and the Fermi energy. We find that the charge current;fluctuations show quite unique statistical features at the;symplectic-unitary crossover regime. Our findings are based on an;evaluation of the generalized transmission coefficients correlation;functions within the stub model and are amenable to experimental test.;DOI: 10.1103/PhysRevB.86.235112;1, INCT/G-5846-2013; Informacao quantica, Inct/H-9493-2013; Lewenkopf, Caio/A-1791-2014;Lewenkopf, Caio/0000-0002-2053-2798;1;0;0;0;1;1098-0121;WOS:000312291700001;;;J;Ruth, Marcel;Meier, Cedrik;Scaling coefficient for three-dimensional grain coalescence of ZnO on;Si(111);PHYSICAL REVIEW B;86;22;224108;10.1103/PhysRevB.86.224108;DEC 11 2012;2012;Grain-rotation-induced coalescence is a well-known growth mechanism of;granular/polycrystalline systems in two dimensions. In three-dimensional;(3D) crystals there are more degrees of freedom, and influences of the;substrate play an important role. In the present work we analyze the 3D;coalescence of ZnO grains on Si(111) by thermal annealing under O-2;atmosphere. Atomic force microscopy and electron backscatter diffraction;measurements reveal a significant increase in the mean grain diameter;and a reorientation that matches the substrate orientation. This;structural reorganization leads to a substantial enhancement of the;electronic layer quality. We describe the grain growth with a diffusive;model and find a volume scaling coefficient of 1.5. This proves that the;additional degrees of freedom significantly accelerate grain-rotation;induced coalescence in three dimensions. DOI: 10.1103/PhysRevB.86.224108;Meier, Cedrik/E-4877-2011;Meier, Cedrik/0000-0002-3787-3572;4;0;0;0;4;1098-0121;WOS:000312291300001;;;J;van den Berg, T. L.;Lombardo, P.;Kuzian, R. O.;Hayn, R.;Orbital polaron in double-exchange ferromagnets;PHYSICAL REVIEW B;86;23;235114;10.1103/PhysRevB.86.235114;DEC 11 2012;2012;We investigate the spectral properties of the two-orbital Hubbard model,;including the pair hopping term, by means of the dynamical mean field;method. This Hamiltonian describes materials in which ferromagnetism is;realized by the double-exchange mechanism, as for instance manganites,;nickelates, or diluted magnetic semiconductors. The spectral function of;the unoccupied states is characterized by a specific equidistant three;peak structure. We emphasize the importance of the double hopping term;on the spectral properties. We show the existence of a ferromagnetic;phase due to electron doping near n = 1 by the double-exchange;mechanism. A quasiparticle excitation at the Fermi energy is found that;we attribute to what we will call an orbital polaron. We derive an;effective spin-pseudospin Hamiltonian for the two-orbital;double-exchange model at n = 1 filling to explain the existence and;dynamics of this quasiparticle. DOI: 10.1103/PhysRevB.86.235114;Kuzian, Roman/C-9079-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Kuzian, Roman/0000-0002-6672-7224;;1;0;0;0;1;1098-0121;WOS:000312291700003;;;J;van Wezel, Jasper;Comment on "Charge-parity symmetry observed through Friedel oscillations;in chiral charge-density waves";PHYSICAL REVIEW B;86;24;247101;10.1103/PhysRevB.86.247101;DEC 11 2012;2012;In their publication [Phys. Rev. B 84, 245125 (2011)], Ishioka et al.;discuss the recently discovered chiral charge-density wave state in;1T-TiSe2 in terms of a parameter H-CDW, whose sign is suggested to;correspond to the handedness of the chiral order. Here, we point out;that H-CDW, as defined by Ishioka et al., cannot be used to characterize;chirality in that way. An alternative measure of chirality for the;specific case of 1T-TiSe2 is suggested. DOI: 10.1103/PhysRevB.86.247101;2;0;0;0;2;1098-0121;WOS:000312292100006;;;J;Wan, Li;Iacovella, Christopher R.;Nguyen, Trung D.;Docherty, Hugh;Cummings, Peter T.;Confined fluid and the fluid-solid transition: Evidence from absolute;free energy calculations;PHYSICAL REVIEW B;86;21;214105;10.1103/PhysRevB.86.214105;DEC 11 2012;2012;The debate on whether an organic fluid nanoconfined by mica sheets will;undergo a fluid-to-solid transition as the fluid film thickness is;reduced below a critical value has lasted over two decades. Extensive;experimental and simulation investigations have thus far left this;question only partially addressed. In this work, we adapt and apply;absolute free energy calculations to analyze the phase behavior of a;simple model for nanoconfined fluids, consisting of spherical;Lennard-Jones (LJ) molecules confined between LJ solid walls, which we;use in combination with grand-canonical molecular dynamics simulations.;Absolute Helmholtz free energy calculations of the simulated;nanoconfined systems directly support the existence of order-disorder;phase transition as a function of decreasing wall separation, providing;results in close agreement with previous experiments and detailed;atomistic simulations. DOI: 10.1103/PhysRevB.86.214105;Iacovella, Christopher/D-2050-2011; Cummings, Peter/B-8762-2013;Cummings, Peter/0000-0002-9766-2216;5;0;0;0;5;1098-0121;WOS:000312290000001;;;J;Zaletel, Michael P.;Mong, Roger S. K.;Exact matrix product states for quantum Hall wave functions;PHYSICAL REVIEW B;86;24;245305;10.1103/PhysRevB.86.245305;DEC 11 2012;2012;We show that the model wave functions used to describe the fractional;quantum Hall effect have exact representations as matrix product states;(MPS). These MPS can be implemented numerically in the orbital basis of;both finite and infinite cylinders, which provides an efficient way of;calculating arbitrary observables. We extend this approach to the;charged excitations and numerically compute their Berry phases. Finally,;we present an algorithm for numerically computing the real-space;entanglement spectrum starting from an arbitrary orbital basis MPS,;which allows us to study the scaling properties of the real-space;entanglement spectra on infinite cylinders. The real-space entanglement;spectrum obeys a scaling form dictated by the edge conformal field;theory, allowing us to accurately extract the two entanglement;velocities of the Moore-Read state. In contrast, the orbital space;spectrum is observed to scale according to a complex set of power laws;that rule out a similar collapse. DOI: 10.1103/PhysRevB.86.245305;16;0;0;0;16;1098-0121;WOS:000312292100002;;;J;Berdiyorov, G. R.;Chao, X. H.;Peeters, F. M.;Wang, H. B.;Moshchalkov, V. V.;Zhu, B. Y.;Magnetoresistance oscillations in superconducting strips: A;Ginzburg-Landau study;PHYSICAL REVIEW B;86;22;224504;10.1103/PhysRevB.86.224504;DEC 10 2012;2012;Within the time-dependent Ginzburg-Landau theory we study the dynamic;properties of current-carrying superconducting strips in the presence of;a perpendicular magnetic field. We found pronounced voltage peaks as a;function of the magnetic field, the amplitude of which depends both on;sample dimensions and external parameters. These voltage oscillations;are a consequence of moving vortices, which undergo alternating static;and dynamic phases. At higher fields or for high currents, the;continuous motion of vortices is responsible for the monotonic;background on which the resistance oscillations due to the entry of;additional vortices are superimposed. Mechanisms for such;vortex-assisted resistance oscillations are discussed. Qualitative;changes in the magnetoresistance curves are observed in the presence of;random defects, which affect the dynamics of vortices in the system.;Zhu, Bei Yi/C-1506-2011; Moshchalkov, Victor/I-7232-2013; Wang, HB/M-7461-2013;2;0;0;0;2;1098-0121;WOS:000312064300004;;;J;Bogan, A.;Hatke, A. T.;Studenikin, S. A.;Sachrajda, A.;Zudov, M. A.;Pfeiffer, L. N.;West, K. W.;Microwave-induced resistance oscillations in tilted magnetic fields;PHYSICAL REVIEW B;86;23;235305;10.1103/PhysRevB.86.235305;DEC 10 2012;2012;We have studied the effect of an in-plane magnetic field on;microwave-induced resistance oscillations in a high mobility;two-dimensional electron system. We have found that the oscillation;amplitude decays exponentially with an in-plane component of the;magnetic field B-parallel to. While these findings cannot be accounted;for by existing theories, our analysis suggests that the decay can be;explained by a B-parallel to-induced correction to the quantum;scattering rate, which is quadratic in B-parallel to.;Zudov, Michael/A-3013-2008;7;1;0;0;7;1098-0121;WOS:000312064700005;;;J;Dahl, J.;Kuzmin, M.;Adell, J.;Balasubramanian, T.;Laukkanen, P.;Formation of polar InN with surface Fermi level near the valence band;maximum by means of ammonia nitridation;PHYSICAL REVIEW B;86;24;245304;10.1103/PhysRevB.86.245304;DEC 10 2012;2012;Development of InN films for devices is hindered due to metallic In;clusters, formed readily during growth, and unintentional n-type;conductivity of the nominally undoped films, including surface;electron-accumulation layers via the Fermi level pinning into the;conduction band. Plasma nitridation eliminates even large In clusters;from the surface by changing them to two-dimensional InN [Yamaguchi and;Nanishi, Appl. Phys. Expr. 2, 051001 (2009)]. Here we utilized a similar;approach, that is, nitridation of In-covered surfaces with ammonia (NH3);to grow thin, up to 25 nm thick polar InN films on Si(111) and GaN(0001);substrates. By means of scanning tunneling microscopy and spectroscopy,;as well as photoelectron spectroscopy, we show that this simple NH3;nitridation provides the hitherto not reported formation of polar;InN(000-1) films with the surface Fermi level close to the valence band;maximum, as recent calculations [Belabbes et al., Phys. Rev. B 84,;205304 (2011)] predict. DOI: 10.1103/PhysRevB.86.245304;1;0;0;0;1;1098-0121;WOS:000312065400006;;;J;Ghosh, Sankha;English, Niall J.;Ab initio study on optoelectronic properties of interstitially versus;substitutionally doped titania;PHYSICAL REVIEW B;86;23;235203;10.1103/PhysRevB.86.235203;DEC 10 2012;2012;Density functional theory calculations were performed for Cr, N, and C;monodoping in both rutile and anatase phases of crystalline titania. The;formation and binding energies, electronic structure, and optical;properties were determined. It was found that although C has a;predominant preference for occupying a lattice O-site, N has higher;preference for interstitial occupancy in the vicinity of an O atom in;anatase, whereas both prefer to maintain interstitial occupancy in;rutile, albeit with both N and C exhibiting a relatively higher;preference for anatase over rutile. Furthermore, Cr is more;energetically stable in the rutile phase relative to anatase for;substitutional doping, albeit with comparable formation energies for;both interstitial and substitutional doping. Interstitial C-impurities;were observed to occupy the oxygen lattice sites in anatase, but not in;rutile. In terms of N-doping, it was found that interstitial doping;exhibits higher visible light photoactivity than substitutional doping.;1;0;0;0;1;1098-0121;WOS:000312064700003;;;J;Howie, Ross T.;Scheler, Thomas;Guillaume, Christophe L.;Gregoryanz, Eugene;Proton tunneling in phase IV of hydrogen and deuterium;PHYSICAL REVIEW B;86;21;214104;10.1103/PhysRevB.86.214104;DEC 10 2012;2012;Using in situ optical spectroscopy we have investigated the temperature;stability of the mixed atomic and molecular phases IV of dense deuterium;and hydrogen. Through a series of low-temperature experiments at high;pressures, we observe phase III-to-IV transformation, imposing;constraints on the P-T phase diagrams. The spectral features of the;phase IV-III transition and differences in appearances of the isotopes;Raman spectra strongly indicate the presence of proton tunneling in;phase IV. No differences between isotopes were observed in absorption;spectroscopic studies, resulting in identical values for the band gap.;The extrapolation of the combined band gap yields 375 GPa as the minimum;transition pressure to the metallic state of hydrogen (deuterium). The;minute changes in optical spectra above 275 GPa might suggest the;presence of a new solid modification of hydrogen (deuterium), closely;related structurally to phase IV. DOI: 10.1103/PhysRevB. 86.214104;15;1;0;0;15;1098-0121;WOS:000312063700001;;;J;Hrahsheh, Fawaz;Hoyos, Jose A.;Vojta, Thomas;Rounding of a first-order quantum phase transition to a strong-coupling;critical point;PHYSICAL REVIEW B;86;21;214204;10.1103/PhysRevB.86.214204;DEC 10 2012;2012;We investigate the effects of quenched disorder on first-order quantum;phase transitions on the example of the N-color quantum Ashkin-Teller;model. By means of a strong-disorder renormalization group, we;demonstrate that quenched disorder rounds the first-order quantum phase;transition to a continuous one for both weak and strong coupling between;the colors. In the strong-coupling case, we find a distinct type of;infinite-randomness critical point characterized by additional internal;degrees of freedom. We investigate its critical properties in detail and;find stronger thermodynamic singularities than in the random transverse;field Ising chain. We also discuss the implications for higher spatial;dimensions as well as unusual aspects of our renormalization-group;scheme. DOI: 10.1103/PhysRevB.86.214204;Hoyos, Jose/F-2742-2012;2;0;0;0;2;1098-0121;WOS:000312063700002;;;J;Huevonen, D.;Zhao, S.;Ehlers, G.;Mansson, M.;Gvasaliya, S. N.;Zheludev, A.;Excitations in a quantum spin liquid with random bonds;PHYSICAL REVIEW B;86;21;214408;10.1103/PhysRevB.86.214408;DEC 10 2012;2012;We present the results of an inelastic neutron-scattering study on two;bond disordered quasi-two-dimensional quantum magnets;(C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an;increase of spin gap, a reduction of magnon bandwidth, and a decrease of;magnon lifetimes compared to the x = 0 sample. Additional magnon damping;is observed at higher energies away from the zone center, which is found;to follow the density of single-particle states. DOI:;10.1103/PhysRevB.86.214408;Instrument, CNCS/B-4599-2012; Ehlers, Georg/B-5412-2008; Huvonen, Dan/A-6664-2008; Mansson, Martin/C-1134-2014;8;0;0;0;8;1098-0121;WOS:000312063700005;;;J;Hwang, Kyusung;Park, Kwon;Kim, Yong Baek;Influence of Dzyaloshinskii-Moriya interactions on magnetic structure of;a spin-1/2 deformed kagome lattice antiferromagnet;PHYSICAL REVIEW B;86;21;214407;10.1103/PhysRevB.86.214407;DEC 10 2012;2012;Motivated by the recent neutron-scattering experiment on Rb2Cu3SnF12;[Nature Phys. 6, 865 (2010)], we investigate the effect of;Dzyaloshinskii-Moriya interactions in a theoretical model for the;magnetic structure of this material. Considering the valence bond solid;ground state, which has a 12-site unit cell, we develop the bond;operator mean-field theory. It is shown that the Dzyaloshinskii-Moriya;interactions significantly modify the triplon dispersions around the;Gamma point and cause a shift of the spin-gap (the minimum triplon gap);position from the K to Gamma point in the first Brillouin zone. The spin;gap is also evaluated in exact diagonalization studies on a 24-site;cluster. We discuss a magnetic transition induced by the;Dzyaloshinskii-Moriya interactions in the bond operator framework.;Moreover, the magnetization process under external magnetic fields is;studied within the exact diagonalization approach. We find that the;results of both approaches are consistent with the experimental;findings. DOI: 10.1103/PhysRevB.86.214407;3;0;0;0;3;1098-0121;WOS:000312063700004;;;J;Ignacio, M.;Pierre-Louis, O.;Impalement dynamics and Brownian motion of solid islands on nanopillars;PHYSICAL REVIEW B;86;23;235410;10.1103/PhysRevB.86.235410;DEC 10 2012;2012;We study the dynamics of solid islands deposited on nanopillars using;kinetic Monte Carlo simulations. The islands are initially placed on the;top of the pillars, in the so-called Cassie-Baxter state. For high;pillars, the dynamics is divided into two phases. The first phase;corresponds to the deterministic and irreversible impalement of the;island. The dynamics of this phase is governed by surface diffusion.;Once the island has collapsed, a second phase is observed where the;island exhibits Brownian motion along the pillars, characterized by a;diffusion constant D-i and a kinetic coefficient K-i accounting for the;interaction of the island with the top of the pillars. The random walk;stops when the island reaches the bottom of the substrate, where it;sticks irreversibly. When the island wettability is small, the island;diffusion constant D-i is controlled by adatom diffusion, and scales as;the inverse of the number of atoms in the island. In contrast, for large;wettabilities, we observe that D-i oscillates as the island size is;increased. The minimum of the oscillations corresponds to;nucleation-limited dynamics, where D-i is independent of the island;size. We also determine the time for partial irreversible collapse on;shorter pillars, leading to the so-called Wenzel state. Finally, we;discuss the orders of magnitude of the typical duration of these;processes.;2;0;0;0;2;1098-0121;WOS:000312064700007;;;J;Jarlborg, T.;Barbiellini, B.;Markiewicz, R. S.;Bansil, A.;Different doping from apical and planar oxygen vacancies in;Ba2CuO4-delta and La2CuO4-delta: First-principles band structure;calculations;PHYSICAL REVIEW B;86;23;235111;10.1103/PhysRevB.86.235111;DEC 10 2012;2012;First-principles band structure calculations for large supercells of;Ba2CuO4-delta and La2CuO4-delta with different distributions and;concentrations of oxygen vacancies show that the effective doping on;copper sites strongly depends on where the vacancy is located. A vacancy;within the Cu layer produces a weak doping effect while a vacancy;located at an apical oxygen site acts as a stronger electron dopant on;the copper layers and gradually brings the electronic structure close to;that of La2-xSrxCuO4. These effects are robust and only depend;marginally on lattice distortions. Our results show that deoxygenation;can reduce the effect of traditional La/Sr or La/Nd substitutions. Our;study clearly identifies location of the dopant in the crystal structure;as an important factor in doping of the cuprate planes.;6;0;0;0;6;1098-0121;WOS:000312064700002;;;J;Kunimori, K.;Nakamura, M.;Nohara, H.;Tanida, H.;Sera, M.;Nishioka, T.;Matsumura, M.;Unusual magnetic order in CeT2Al10 (T = Ru, Os) in comparison with;localized NdFe2Al10;PHYSICAL REVIEW B;86;24;245106;10.1103/PhysRevB.86.245106;DEC 10 2012;2012;We have investigated the magnetic properties in the well localized;compound NdFe2Al10 and the Kondo semiconductor CeT2Al10 (T = Ru, Os) to;clarify the origin of the unusual magnetic order in CeT2Al10. In;NdFe2Al10, the experimental results of the magnetic properties could be;reproduced very well by the mean-field calculation for the;two-sublattice model. In CeT2Al10 we could reproduce the anisotropic;magnetic susceptibility in the paramagnetic region above 60-100 K very;well by the mean-field calculation for the two-sublattice model;introducing an anisotropic exchange interaction and the recently;determined crystalline electric field (CEF) level scheme from Strigari;et al. [Phys. Rev. B 86, 081105 (2012)]. However, in the;antiferromagnetic (AFM) ordered state, we could not reproduce the;experimental results at all in the framework of the mean-field;calculation for the two-sublattice model. We propose that although the;magnetic properties in the paramagnetic region above 60-100 K could be;understood well by a localized picture, the ordered state could not, and;that the c-f hybridization, especially along the a axis, is associated;with the unusual magnetic order in CeT2Al10. DOI:;10.1103/PhysRevB.86.245106;Tanida, Hiroshi/E-1878-2013;14;0;0;0;14;1098-0121;WOS:000312065400003;;;J;Lee, Jin Bae;Hong, Won G.;Kim, Hae Jin;Jaglicic, Z.;Jazbec, S.;Wencka, M.;Jelen, A.;Dolinsek, J.;Canted antiferromagnetism on a nanodimensional spherical surface;geometry: The case of MnCO3 small hollow nanospheres;PHYSICAL REVIEW B;86;22;224407;10.1103/PhysRevB.86.224407;DEC 10 2012;2012;Canted antiferromagnetism on a nanodimensional spherical surface;geometry was investigated on manganese carbonate MnCO3 small hollow;nanospheres of mean diameter 7.0 +/- 0.3 nm and shell thickness of 0.7;nm, by performing magnetic measurements and specific heat study, in;comparison to the bulk form of the same material. Contrary to the;expectation that small magnetic nanoparticles become superparamagnetic,;the phase transition to the canted antiferromagnetic (AFM) state in the;MnCO3 hollow nanospheres is preserved and retains, at a qualitative;level, all the features of the canted AFM state of the bulk material. At;a quantitative level, some significant differences between the hollow;nanospheres and the bulk were observed, which can all be explained by;the weakened interspin interactions in the hollow nanospheres due to;reduced atomic coordination by the neighboring atoms. This makes the;canted AFM structure of the hollow nanospheres more soft and fragile;with respect to external forces like the magnetic field, as compared to;the rigid and robust structure of the bulk material.;1;0;0;0;1;1098-0121;WOS:000312064300002;;;J;Levkivskyi, Ivan P.;Froehlich, Juerg;Sukhorukov, Eugene V.;Theory of fractional quantum Hall interferometers;PHYSICAL REVIEW B;86;24;245105;10.1103/PhysRevB.86.245105;DEC 10 2012;2012;Interference of fractionally charged quasiparticles is expected to lead;to Aharonov-Bohm oscillations with periods larger than the flux quantum.;However, according to the Byers-Yang theorem, observables of an;electronic system are invariant under an adiabatic insertion of a;quantum of singular flux. We resolve this seeming paradox by considering;a microscopic model of electronic interferometers made from a quantum;Hall liquid at filling factor 1/m with the shape of a Corbino disk. In;such interferometers, the quantum Hall edge states are utilized in place;of optical beams, the quantum point contacts play the role of beam;splitters connecting different edge channels, and Ohmic contacts;represent a source and drain of quasiparticle currents. Depending on the;position of Ohmic contacts, one distinguishes interferometers of;Fabry-Perot (FP) and Mach-Zehnder (MZ) type. An approximate ground state;of such interferometers is described by a Laughlin-type wave function,;and low-energy excitations are incompressible deformations of this;state. We construct a low-energy effective theory by restricting the;microscopic Hamiltonian of electrons to the space of incompressible;deformations and show that the theory of the quantum Hall edge so;obtained is a generalization of a chiral conformal field theory. In our;theory, a quasiparticle tunneling operator is found to be a;single-valued function of tunneling point coordinates, and its phase;depends on the topology determined by the positions of Ohmic contacts.;We describe strong coupling of the edge states to Ohmic contacts and the;resulting quasiparticle current through the interferometer with the help;of a master equation. We find that the coherent contribution to the;average quasiparticle current through MZ interferometers does not vanish;after summation over quasiparticle degrees of freedom. However, it;acquires oscillations with the electronic period, in agreement with the;Byers-Yang theorem. Importantly, our theory does not rely on any ad hoc;constructions, such as Klein factors, etc. When the magnetic flux;through an FP interferometer is varied with a modulation gate, current;oscillations have the quasiparticle periodicity, thus allowing for;spectroscopy of quantum Hall edge states. DOI:;10.1103/PhysRevB.86.245105;2;0;0;0;2;1098-0121;WOS:000312065400002;;;J;Li, Chun-Mei;Luo, Hu-Bin;Hu, Qing-Miao;Yang, Rui;Johansson, Borje;Vitos, Levente;Role of magnetic and atomic ordering in the martensitic transformation;of Ni-Mn-In from a first-principles study;PHYSICAL REVIEW B;86;21;214205;10.1103/PhysRevB.86.214205;DEC 10 2012;2012;The composition-dependent lattice parameters, crystal structure, elastic;properties, magnetic moment, and electronic structure of Ni2Mn1+xIn1-x;(0 <= x <= 0.6) are studied by using first-principles calculations. It;is shown that the martensitic phase transition (MPT) from cubic L2(1) to;tetragonal L1(0) accompanies theMn(Mn)-Mn-In ferromagnetic (FM) to;antiferromagnetic (AFM) transition, at around the critical composition x;= 0.32, in agreement with the experimental measurement. The Mn-In atomic;disorder leads to decreasing stability of the martensite relative to the;austenite, which depresses the MPT. The shear elastic constant C' of the;parent phase first decreases slightly with increasing x and then remains;almost unchanged above x = 0.32, indicating C' alone cannot account for;the increase of the MPT temperature with x. The total magnetic moments;for the L2(1) phase are in good agreement with those determined by;experiments, whereas for the L1(0) phase they are slightly larger than;the experimental data due to the possibleMn-In atomic disorder in the;sample. The calculated density of states demonstrate that the covalent;bonding between the minority spin states of Ni and In plays an important;role in both the magnetic and structural stability. DOI:;10.1103/PhysRevB.86.214205;Hu, Qing-Miao/D-3345-2014;5;0;0;0;5;1098-0121;WOS:000312063700003;;;J;Liu, Bin;Seko, Atsuto;Tanaka, Isao;Cluster expansion with controlled accuracy for the MgO/ZnO pseudobinary;system via first-principles calculations;PHYSICAL REVIEW B;86;24;245202;10.1103/PhysRevB.86.245202;DEC 10 2012;2012;Using the cluster analysis of the structure population (CASP) method,;error of cluster expansion (CE) can be controlled. Combining the CASP-CE;with a systematic set of first-principles total energies, a model;wide-gap pseudobinary system with simple crystal structures MgO-ZnO is;revisited. Ground-state structures are exhaustively searched for both;rocksalt and wurtzite structures. A few structures as yet unreported are;found. The vibrational contribution to the Gibbs free-energy is;evaluated by first-principles phonon calculations within the;quasiharmonic approximation. Monte Carlo simulations are then made to;compute grand potentials of two structures using the thermodynamic;integration. DOI: 10.1103/PhysRevB.86.245202;Tanaka, Isao/B-5941-2009; Liu, Bin/N-9955-2014;1;1;0;0;1;1098-0121;WOS:000312065400005;;;J;Liu, Pan;Santana, Juan A. Colon;Dai, Qilin;Wang, Xianjie;Dowben, Peter A.;Tang, Jinke;Sign of the superexchange coupling between next-nearest neighbors in EuO;PHYSICAL REVIEW B;86;22;224408;10.1103/PhysRevB.86.224408;DEC 10 2012;2012;The sign of the superexchange coupling J(2) between next-nearest;neighboring Eu2+ magnetic moments in EuO is a matter subject to debate.;We have obtained evidence that this coupling is of antiferromagnetic;nature (J(2) < 0). EuO thin films grown at different temperatures;suggest that lattice expansion results in enhancement of T-C as clearly;observed in stoichiometric EuO films grown on CaF2 substrates. Resonant;photoemission spectroscopy provides compelling evidence of strong;hybridization between O 2p and Eu 5d6s6p weighted bands, suggesting that;strong superexchange may be mediated by oxygen, thus consistent with the;observed antiferromagnetic behavior between the next-nearest neighboring;Eu atoms via nearest neighbor oxygen in EuO.;Dai, Qilin/K-1437-2013;2;0;0;0;2;1098-0121;WOS:000312064300003;;;J;Luisier, Mathieu;Atomistic modeling of anharmonic phonon-phonon scattering in nanowires;PHYSICAL REVIEW B;86;24;245407;10.1103/PhysRevB.86.245407;DEC 10 2012;2012;Phonon transport is simulated in ultrascaled nanowires in the presence;of anharmonic phonon-phonon scattering. A modified valence-force-field;model containing four types of bond deformation is employed to describe;the phonon band structure. The inclusion of five additional bond;deformation potentials allows us to account for anharmonic effects.;Phonon-phonon interactions are introduced through inelastic scattering;self-energies solved in the self-consistent Born approximation in the;nonequilibrium Green's function formalism. After calibrating the model;with experimental data, the thermal current, resistance, and;conductivity of < 100 >-, < 110 >-, and < 111 >-oriented Si nanowires;with different lengths and temperatures are investigated in the presence;of anharmonic phonon-phonon scattering and compared to their ballistic;limit. It is found that all the simulated thermal currents exhibit a;peak at temperatures around 200 K if phonon scattering is turned on;while they monotonically increase when this effect is neglected.;Finally, phonon transport through Si-Ge-Si nanowires is considered. DOI:;10.1103/PhysRevB.86.245407;12;1;0;0;12;1098-0121;WOS:000312065400007;;;J;Nemirovskii, Sergey K.;Fluctuations of the vortex line density in turbulent flows of quantum;fluids;PHYSICAL REVIEW B;86;22;224505;10.1103/PhysRevB.86.224505;DEC 10 2012;2012;We present an analytical study of fluctuations of the vortex line;density (VLD)  in turbulent flows of;quantum fluids. Two cases are considered. The first is the;counterflowing (Vinen) turbulence, where the vortex lines are;disordered, and the evolution of quantity L(t) obeys the Vinen equation.;The second case is the fluctuations of the VLD in a single vortex;bundle, which develops inside the domain of the concentrated;normal-fluid vorticity. The dynamics of the vortex bundle is described;by the Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations. The latter;case is of special interest, because the set of the quantum vortex;bundles is believed to mimic classical hydrodynamic turbulence. In;steady states the VLD is related to the normal velocity as L = (rho;gamma/rho(s))(2)upsilon(2)(n) for the Vinen case. In the vortex bundle;case, which appears inside the domain of a concentrated vorticity of;normal fluid, the stationary quantity L can be found from the matching;of velocities and is described by L = vertical bar del x v(n)vertical;bar/kappa. In nonstationary situations, and particularly in the;fluctuating turbulent flow, there is a retardation between the;instantaneous value of the normal velocity and the quantity L. This;retardation tends to decrease in accordance with the inner dynamics,;which has a relaxation character. In both cases, the relaxation dynamics;of the VLD is related to fluctuations of the relative velocity. However,;for the Vinen case the rate of temporal change for L(t) is directly;dependent upon delta v(ns), whereas for HVBK dynamics it depends on del;x delta v(ns). Therefore, for the disordered case the spectrum  coincides with the spectrum omega(-5/3). In the;case of the bundle arrangement, the spectrum of the VLD varies (at;different temperatures) from omega(1/3) to omega(-5/3) dependencies.;This conclusion may serve as a basis for the experimental determination;of what kind of turbulence is implemented in different types of;generation.;0;0;0;0;0;1098-0121;WOS:000312064300005;;;J;Peelaers, H.;Van de Walle, C. G.;Effects of strain on band structure and effective masses in MoS2;PHYSICAL REVIEW B;86;24;241401;10.1103/PhysRevB.86.241401;DEC 10 2012;2012;We use hybrid density functional theory to explore the band structure;and effective masses of MoS2, and the effects of strain on the;electronic properties. Strain allows engineering the magnitude as well;as the nature (direct versus indirect) of the band gap. Deformation;potentials that quantify these changes are reported. The calculations;also allow us to investigate the transition in band structure from bulk;to monolayer, and the nature and degeneracy of conduction-band valleys.;Investigations of strain effects on effective masses reveal that small;uniaxial stresses can lead to large changes in the hole effective mass.;DOI: 10.1103/PhysRevB.86.241401;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;56;3;0;0;56;1098-0121;WOS:000312065400001;;;J;Phien, Ho N.;Vidal, Guifre;McCulloch, Ian P.;Infinite boundary conditions for matrix product state calculations;PHYSICAL REVIEW B;86;24;245107;10.1103/PhysRevB.86.245107;DEC 10 2012;2012;We propose a formalism to study dynamical properties of a quantum;many-body system in the thermodynamic limit by studying a finite system;with "infinite boundary conditions" where both finite-size effects and;boundary effects have been eliminated. For one-dimensional systems,;infinite boundary conditions are obtained by attaching two boundary;sites to a finite system, where each of these two sites effectively;represents a semi-infinite extension of the system. One can then use;standard finite-size matrix product state techniques to study a region;of the system while avoiding many of the complications normally;associated with finite-size calculations such as boundary Friedel;oscillations. We illustrate the technique with an example of time;evolution of a local perturbation applied to an infinite;(translationally invariant) ground state, and use this to calculate the;spectral function of the S = 1 Heisenberg spin chain. This approach is;more efficient and more accurate than conventional simulations based on;finite-size matrix product state and density-matrix;renormalization-group approaches. DOI: 10.1103/PhysRevB.86.245107;McCulloch, Ian/A-6037-2011;McCulloch, Ian/0000-0002-8983-6327;6;0;0;0;6;1098-0121;WOS:000312065400004;;;J;Polyakov, O. P.;Corbetta, M.;Stepanyuk, O. V.;Oka, H.;Saletsky, A. M.;Sander, D.;Stepanyuk, V. S.;Kirschner, J.;Spin-dependent Smoluchowski effect;PHYSICAL REVIEW B;86;23;235409;10.1103/PhysRevB.86.235409;DEC 10 2012;2012;Electron charge near atomically sharp corrugations at the surfaces of a;solid tends to spill out and smoothen the abrupt variation of the;positions of the positively charged atomic nuclei. The reason is that;electrons are much less localized than nuclei. This has been discussed;already some 70 years ago by Smoluchowski [R. Smoluchowski, Phys. Rev.;60, 661 (1941)], and the corresponding effect of charge redistribution;near surface corrugations bears his name. The Smoluchowski effect;focuses on the total electron charge density. It neglects that;electrons-in addition to charge-also carry a spin. We discuss;spin-dependent electron spill out and demonstrate in a combined;theoretical and experimental work that compelling consequences for;spin-polarization and spin-dependent transport arise at the edges of;magnetic nanostructures due to the spin-dependent Smoluchowski effect.;We find a variation of the tunnel magnetoresistance ratio of more than;20% on a length scale of a few atomic diameters.;3;0;0;0;3;1098-0121;WOS:000312064700006;;;J;Rajeswaran, B.;Khomskii, D. I.;Zvezdin, A. K.;Rao, C. N. R.;Sundaresan, A.;Field-induced polar order at the Neel temperature of chromium in;rare-earth orthochromites: Interplay of rare-earth and Cr magnetism;PHYSICAL REVIEW B;86;21;214409;10.1103/PhysRevB.86.214409;DEC 10 2012;2012;We report field-induced switchable polarization (P similar to 0.2-0.8 mu;C/cm(2)) below the Neel temperature of chromium (T-N(Cr)) in weakly;ferromagnetic rare-earth orthochromites, RCrO3 (R = rare earth) but only;when the rare-earth ion is magnetic. Intriguingly, the polarization in;ErCrO3 (T-C = 133 K) disappears at a spin-reorientation (Morin);transition (T-SR similar to 22 K) below which the weak ferromagnetism;associated with the Cr sublattice also disappears, demonstrating the;crucial role of weak ferromagnetism in inducing the polar order.;Further, the polarization (P) is strongly influenced by an applied;magnetic field, indicating a strong magnetoelectric effect. We suggest;that the polar order occurs in RCrO3, due to the combined effect of the;poling field that breaks the symmetry and the exchange field on the R;ion from the Cr sublattice that stabilizes the polar state. We propose;that a similar mechanism could work in the isostructural rare-earth;orthoferrites RFeO3 as well. DOI: 10.1103/PhysRevB.86.214409;Athinarayanan, Sundaresan/B-2176-2010; Zvezdin, Anatoly/K-2072-2013;24;1;0;0;24;1098-0121;WOS:000312063700006;;;J;Rhim, Jun-Won;Park, Kwon;Self-similar occurrence of massless Dirac particles in graphene under a;magnetic field;PHYSICAL REVIEW B;86;23;235411;10.1103/PhysRevB.86.235411;DEC 10 2012;2012;Intricate interplay between the periodicity of the lattice structure and;that of the cyclotron motion gives rise to a well-known self-similar;fractal structure of the energy eigenvalue, known as the Hofstadter;butterfly, for an electron moving in lattice under magnetic field.;Connected with the n = 0 Landau level, the central band of the;Hofstadter butterfly is especially interesting in the honeycomb lattice.;While the entire Hofstadter butterfly can be in principle obtained by;solving Harper's equations numerically, the weak-field limit, most;relevant for experiment, is intractable owing to the fact that the size;of the Hamiltonian matrix, which needs to be diagonalized, diverges. In;this paper, we develop an effective Hamiltonian method that can be used;to provide an accurate analytic description of the central Hofstadter;band in the weak-field regime. One of the most important discoveries;obtained in this work is that massless Dirac particles always exist;inside the central Hofstadter band no matter how small the magnetic flux;may become. In other words, with its bandwidth broadened by the lattice;effect, the n = 0 Landau level contains massless Dirac particles within;itself. In fact, by carefully analyzing the self-similar recursive;pattern of the central Hofstadter band, we conclude that massless Dirac;particles should occur under arbitrary magnetic field. As a corollary,;the central Hofstadter band also contains a self-similar structure of;recursive Landau levels associated with such massless Dirac particles.;To assess the experimental feasibility of observing massless Dirac;particles inside the central Hofstadter band, we compute the width of;the central Hofstadter band as a function of magnetic field in the;weak-field regime.;5;0;0;0;5;1098-0121;WOS:000312064700008;;;J;Robinson, Zachary R.;Tyagi, Parul;Mowll, Tyler R.;Ventrice, Carl A., Jr.;Hannon, James B.;Argon-assisted growth of epitaxial graphene on Cu(111);PHYSICAL REVIEW B;86;23;235413;10.1103/PhysRevB.86.235413;DEC 10 2012;2012;The growth of graphene by catalytic decomposition of ethylene on Cu(111);in an ultrahigh vacuum system was investigated with low-energy electron;diffraction, low-energy electron microscopy, and atomic force;microscopy. Attempts to form a graphene overlayer using ethylene at;pressures as high as 10 mTorr and substrate temperatures as high as 900;degrees C resulted in almost no graphene growth. By using an argon;overpressure, the growth of epitaxial graphene on Cu(111) was achieved.;The suppression of graphene growth without the use of an argon;overpressure is attributed to Cu sublimation at elevated temperatures.;During the initial stages of growth, a random distribution of rounded;graphene islands is observed. The predominant rotational orientation of;the islands is within +/- 1 degrees of the Cu(111) substrate lattice.;Robinson, Zachary/B-5128-2013;11;1;0;0;11;1098-0121;WOS:000312064700010;;;J;Sheps, Tatyana;Brocious, Jordan;Corso, Brad L.;Guel, O. Tolga;Whitmore, Desire;Durkaya, Goeksel;Potma, Eric O.;Collins, Philip G.;Four-wave mixing microscopy with electronic contrast of individual;carbon nanotubes;PHYSICAL REVIEW B;86;23;235412;10.1103/PhysRevB.86.235412;DEC 10 2012;2012;We review an extensive study of the factors that influence the intensity;of coherent, nonlinear four-wave mixing (FWM) in carbon nanotubes, with;particular attention to the variability inherent to single-walled carbon;nanotubes (SWNTs). Through a combination of spatial imaging and;spectroscopy applied to hundreds of individual SWNTs in optoelectronic;devices, the FWM response is shown to vary systematically with;free-carrier concentration. This dependence is manifested both in the;intrinsic SWNT band structure and also by extrinsic and environmental;effects. We demonstrate the sensitivity of the SWNT FWM signal by;investigating SWNTs transferred from one substrate to another, before;and after the introduction of chemical damage, and with chemical and;electrostatic doping. The results demonstrate FWM as a sensitive;technique for interrogating SWNT optoelectronic properties.;3;0;0;0;3;1098-0121;WOS:000312064700009;;;J;Tian, Zhiting;Esfarjani, Keivan;Chen, Gang;Enhancing phonon transmission across a Si/Ge interface by atomic;roughness: First-principles study with the Green's function method;PHYSICAL REVIEW B;86;23;235304;10.1103/PhysRevB.86.235304;DEC 10 2012;2012;Knowledge on phonon transmittance as a function of phonon frequency and;incidence angle at interfaces is vital for multiscale modeling of heat;transport in nanostructured materials. Although thermal conductivity;reduction in nanostructured materials can usually be described by phonon;scattering due to interface roughness, we show how a Green's function;method in conjunction with the Landauer formalism suggests that;interface roughness induced by atomic mixing can increase phonon;transmission and interfacial thermal conductance. This is an attempt to;incorporate first-principles force constants derived from ab initio;density-functional theory (DFT) into Green's function calculation for;infinitely large three-dimensional crystal structure. We also;demonstrate the importance of accurate force constants by comparing the;phonon transmission and thermal conductance using force constants;obtained from semiempirical Stillinger-Weber potential and;first-principles DFT calculations.;Chen, Gang/J-1325-2014;Chen, Gang/0000-0002-3968-8530;14;0;0;0;14;1098-0121;WOS:000312064700004;;;J;Uhm, Sang Hoon;Yeom, Han Woong;Electron-phonon interaction of one-dimensional and two-dimensional;surface states in indium adlayers on the Si(111) surface;PHYSICAL REVIEW B;86;24;245408;10.1103/PhysRevB.86.245408;DEC 10 2012;2012;We performed angle-resolved photoelectron spectroscopy measurements on;one-and two-dimensional (1D and 2D) metallic surface states in indium;layers on the Si(111) surface as a function of temperature. The;temperature dependence of surface-state energy widths was used to;estimate the electron-phonon coupling constant lambda. The 2D metallic;surface states of the root 7 x root 3-In layer above one monolayer;exhibit lambda = 0.8 similar to 1.0, similar to the value of bulk indium;0.9. This is discussed in the light of a recent structure model with a;double indium layer and the relatively high superconducting transition;temperature of this surface. On the other hand, the lambda's of two 1D;surface states of the 4 x 1-In surface with one monolayer of indium are;much higher than that of root 7 x root 3-In, reaching 1.8, which is the;largest ever reported for a surface state. The origin of the enhanced;electron-phonon coupling and its relationship to the charge-density-wave;phase transition of this surface are discussed. DOI:;10.1103/PhysRevB.86.245408;1;0;0;0;1;1098-0121;WOS:000312065400008;;;J;Vekilova, O. Yu.;Simak, S. I.;Ponomareva, A. V.;Abrikosov, I. A.;Influence of Ni on the lattice stability of Fe-Ni alloys at multimegabar;pressures;PHYSICAL REVIEW B;86;22;224107;10.1103/PhysRevB.86.224107;DEC 10 2012;2012;The lattice stability trends of the primary candidate for Earth's core;material, the Fe-Ni alloy, were examined from first principles. We;employed the exact muffin-tin orbital method (EMTO) combined with the;coherent potential approximation (CPA) for the treatment of alloying;effects. It was revealed that high pressure reverses the trend in the;relative stabilities of the body-centered cubic (bcc), face-centered;cubic (fcc), and hexagonal close-packed (hcp) phases observed at ambient;conditions. In the low pressure region the increase of Ni concentration;in the Fe-Ni alloy enhances the bcc phase destabilization relative to;the more close-packed fcc and hcp phases. However, at 300 GPa (Earth's;core pressure), the effect of Ni addition is opposite. The reverse of;the trend is associated with the suppression of the ferromagnetism of Fe;when going from ambient pressures to pressure conditions corresponding;to those of Earth's core. The first-principles results are explained in;the framework of the canonical band model.;0;0;0;0;0;1098-0121;WOS:000312064300001;;;J;Wang, Kang;Light wave states in quasiperiodic metallic structures;PHYSICAL REVIEW B;86;23;235110;10.1103/PhysRevB.86.235110;DEC 10 2012;2012;We investigate the light wave states in the octagonal and decagonal;quasiperiodic metallic structures by considering their respective;approximants at different orders. The mechanisms underlying the light;wave behaviors are studied in relation to various structure parameters;and configurations. We show that the formation of the first passbands,;that delimit the photonic band gaps and determine the plasma gaps,;involves only the lowest frequency resonance modes inside the fat tiles,;and that light localization occurs due to resonances in high symmetry;local centers as well as in the fragments of such centers, formed by the;skinny tiles. The structure filling rate affects the localized state;frequencies relative to the first passbands, as well as the plasma;frequency levels, by modulating the frequency levels of the resonance;modes and the widths of the passbands. The results of this study can be;generalized to other metallic quasiperiodic and related structures.;1;0;0;0;1;1098-0121;WOS:000312064700001;;;J;Singh, Shashi B.;Yang, L. T.;Wang, Y. F.;Shao, Y. C.;Chiang, C. W.;Chiou, J. W.;Lin, K. T.;Chen, S. C.;Wang, B. Y.;Chuang, C. H.;Ling, D. C.;Pong, W. F.;Tsai, M. H.;Tsai, H. M.;Pao, C. W.;Shiu, H. W.;Chen, C. H.;Lin, H.-J.;Lee, J. F.;Yamane, H.;Kosugi, N.;Correlation between p-type conductivity and electronic structure of;Cr-deficient CuCr1-xO2 (x = 0-0.1);PHYSICAL REVIEW B;86;24;241103;10.1103/PhysRevB.86.241103;DEC 7 2012;2012;The correlation between the p-type hole conduction and the electronic;structures of Cr-deficient CuCr1-xO2 (x = 0-0.1) compounds was;investigated using O K-, Cu, and Cr L-3,L-2-edge x-ray absorption;near-edge structure (XANES), scanning photoelectron microscopy, and;x-ray emission spectroscopy measurements. XANES spectra reveal a gradual;increase in the Cu valence from Cu1+ to Cu2+ with increasing Cr;deficiency x, whereas, the valence of Cr remains constant as Cr3+. These;results indicate that the p-type conductivity in the CuCr1-xO2 samples;is enhanced by a Cu1+-O-Cu2+ rather than a Cr3+-Cr4+ or direct;Cu1+-O-Cu2+ holemechanism. Remarkable Cr-deficiency-induced changes in;the densities of Cu 3d, Cu 3d-O 2p, andO2p states at or near the;valence-band maximum or the Fermi level were also observed. In addition,;a crossover of conductionmechanism from thermally activated (TA) hopping;to a combination of TA and Mott's three-dimensional variable range;hopping occurs around 250 K.;Yamane, Hiroyuki/K-5297-2013;0;0;0;0;0;1098-0121;WOS:000312025700004;;;J;Bossy, Jacques;Ollivier, Jacques;Schober, Helmut;Glyde, H. R.;Excitations of amorphous solid helium;PHYSICAL REVIEW B;86;22;224503;10.1103/PhysRevB.86.224503;DEC 7 2012;2012;We present neutron scattering measurements of the dynamic structure;factor S(Q,omega) of amorphous solid helium confined in 47-angstrom pore;diameter MCM-41 at pressure 48.6 bars. At low temperature T = 0.05 K, we;observe S(Q,omega) of the confined quantum amorphous solid plus the bulk;polycrystalline solid between the MCM-41 powder grains. No liquidlike;phonon-roton modes, other sharply defined modes at low energy (omega <;1.0 meV), or modes unique to a quantum amorphous solid that might;suggest superflow are observed. Rather, the S(Q, omega) of confined;amorphous and bulk polycrystalline solid appear to be very similar. At;higher temperature (T > 1 K), the amorphous solid in the MCM-41 pores;melts to a liquid which has a broad S(Q,omega) peaked near omega similar;or equal to 0, characteristic of normal liquid He-4 under pressure.;Expressions for the S(Q,omega) of amorphous and polycrystalline solid;helium are presented and compared. In previous measurements of liquid;He-4 confined in MCM-41 at lower pressure, the intensity in the liquid;roton mode decreases with increasing pressure until the roton vanishes;at the solidification pressure (38 bars), consistent with no roton in;the solid observed here.;2;0;0;0;2;1098-0121;WOS:000321857700002;;;J;Joly, Yves;Collins, S. P.;Grenier, Stephane;Tolentino, Helio C. N.;De Santis, Maurizio;Birefringence and polarization rotation in resonant x-ray diffraction;PHYSICAL REVIEW B;86;22;220101;10.1103/PhysRevB.86.220101;DEC 7 2012;2012;Birefringence can contribute to x-ray resonant Bragg diffraction and;likely explains recent novel data collected on CuO. We prove these;statements using ab initio simulations which reproduce the experimental;polarization effects quantitatively. We show that an unrotated;polarization signal-ruled out in resonant magnetic scattering within the;electric dipole approximation-arises from the dynamic change in;polarization inside the material. We are able to reproduce all the;related behavior with circular polarization and its dependence on the;angle of rotation about the Bragg wave vector. We provide a tool to;disentangle the various physical origins of the polarization rotation,;providing a more complete understanding of the illuminated material.;TOLENTINO, HELIO/J-1894-2014; Grenier, Stephane/N-1986-2014;TOLENTINO, HELIO/0000-0003-4032-5988; Grenier,;Stephane/0000-0001-8370-7375;12;1;0;0;12;1098-0121;WOS:000321857700001;;;J;Kovacs, Istvan A.;Igloi, Ferenc;Cardy, John;Corner contribution to percolation cluster numbers;PHYSICAL REVIEW B;86;21;214203;10.1103/PhysRevB.86.214203;DEC 7 2012;2012;We study the number of clusters in two-dimensional (2d) critical;percolation, N-Gamma, which intersect a given subset of bonds, Gamma. In;the simplest case, when Gamma is a simple closed curve, N-Gamma is;related to the entanglement entropy of the critical diluted quantum;Ising model, in which Gamma represents the boundary between the;subsystem and the environment. Due to corners in Gamma there are;universal logarithmic corrections to N-Gamma, which are calculated in;the continuum limit through conformal in-variance, making use of the;Cardy-Peschel formula. The exact formulas are confirmed by large scale;Monte Carlo simulations. These results are extended to anisotropic;percolation where they confirm a result of discrete holomorphicity.;Kovacs, Istvan/A-8447-2013;5;0;0;0;5;1098-0121;WOS:000312023100003;;;J;Komsa, Hannu-Pekka;Krasheninnikov, Arkady V.;Effects of confinement and environment on the electronic structure and;exciton binding energy of MoS2 from first principles;PHYSICAL REVIEW B;86;24;241201;10.1103/PhysRevB.86.241201;DEC 7 2012;2012;Using GW first-principles calculations for few-layer and bulk MoS2, we;study the effects of quantum confinement on the electronic structure of;this layered material. By solving the Bethe-Salpeter equation, we also;evaluate the exciton energy in these systems. Our results are in;excellent agreement with the available experimental data. Exciton;binding energy is found to dramatically increase from 0.1 eV in the bulk;to 1.1 eV in the monolayer. The fundamental band gap increases as well,;so that the optical transition energies remain nearly constant. We also;demonstrate that environments with different dielectric constants have a;profound effect on the electronic structure of the monolayer. Our;results can be used for engineering the electronic properties of MoS2;and other transition-metal dichalcogenides and may explain the;experimentally observed variations in the mobility of monolayer MoS2.;Krasheninnikov, Arkady/M-3020-2013;Krasheninnikov, Arkady/0000-0003-0074-7588;50;4;0;0;50;1098-0121;WOS:000312025700003;;;J;Ciuchi, S.;Fratini, S.;Electronic transport and quantum localization effects in organic;semiconductors;PHYSICAL REVIEW B;86;24;245201;10.1103/PhysRevB.86.245201;DEC 7 2012;2012;We explore the charge transport mechanism in organic semiconductors;based on a model that accounts for the thermal intermolecular disorder;at work in pure crystalline compounds, as well as extrinsic sources of;disorder that are present in current experimental devices. Starting from;the Kubo formula, we describe a theoretical framework that relates the;time-dependent quantum dynamics of electrons to the frequency-dependent;conductivity. The electron mobility is then calculated through a;relaxation time approximation that accounts for quantum localization;corrections beyond Boltzmann theory, and allows us to efficiently;address the interplay between highly conducting states in the band range;and localized states induced by disorder in the band tails. The;emergence of a "transient localization" phenomenon is shown to be a;general feature of organic semiconductors that is compatible with the;bandlike temperature dependence of the mobility observed in pure;compounds. Carrier trapping by extrinsic disorder causes a crossover to;a thermally activated behavior at low temperature, which is;progressively suppressed upon increasing the carrier concentration, as;is commonly observed in organic field-effect transistors. Our results;establish a direct connection between the localization of the electronic;states and their conductive properties, formalizing phenomenological;considerations that are commonly used in the literature.;Fratini, Simone/A-4692-2009;Fratini, Simone/0000-0002-4750-3241;4;0;0;0;4;1098-0121;WOS:000312025700001;;;J;Huang, Bing;Lee, Hoonkyung;Defect and impurity properties of hexagonal boron nitride: A;first-principles calculation;PHYSICAL REVIEW B;86;24;245406;10.1103/PhysRevB.86.245406;DEC 7 2012;2012;In this paper, we have systematically studied the structural and;electronic properties of vacancy defects and carbon impurity in;hexagonal boron nitride (h-BN) by using both normal GGA calculations and;advanced hybrid functional calculations. Our calculations show that the;defect configurations and the local bond lengths around defects are;sensitive to their charge states. The highest negative defect charge;states are largely determined by the nearly-free-electron state at the;conduction band minimum of BN. Generally, the in-gap defect levels;obtained from hybrid functional calculations are much deeper than those;obtained from normal GGA calculations. The formation energies of neutral;defects calculated by hybrid functional and GGA are close to each other,;but the defect transition energy levels are quite different between GGA;and hybrid functional calculations. Finally, we show that the charged;defect configurations as well as the transition energy levels exhibit;interesting layer effects.;Huang, Bing/D-8941-2011;Huang, Bing/0000-0001-6735-4637;8;0;0;0;8;1098-0121;WOS:000312025700002;;;J;Maassen, T.;Vera-Marun, I. J.;Guimaraes, M. H. D.;van Wees, B. J.;Contact-induced spin relaxation in Hanle spin precession measurements;PHYSICAL REVIEW B;86;23;235408;10.1103/PhysRevB.86.235408;DEC 7 2012;2012;In the field of spintronics the "conductivity mismatch" problem remains;an important issue. Here the difference between the resistance of;ferromagnetic electrodes and a (high resistive) transport channel causes;injected spins to be backscattered into the leads and to lose their spin;information. We study the effect of the resulting contact-induced spin;relaxation on spin transport, in particular on nonlocal Hanle precession;measurements. As the Hanle line shape is modified by the contact-induced;effects, the fits to Hanle curves can result in incorrectly determined;spin transport properties of the transport channel. We quantify this;effect that mimics a decrease of the spin relaxation time of the channel;reaching more than four orders of magnitude and a minor increase of the;diffusion coefficient by less than a factor of two. Then we compare the;results to spin transport measurements on graphene from the literature.;We further point out guidelines for a Hanle precession fitting procedure;that allows the reliable extraction of spin transport properties from;measurements.;Vera-Marun, Ivan/A-4704-2013; Guimaraes, Marcos/K-1940-2013;Vera-Marun, Ivan/0000-0002-6347-580X;;14;1;0;0;14;1098-0121;WOS:000312024900002;;;J;Murch, K. W.;Ginossar, E.;Weber, S. J.;Vijay, R.;Girvin, S. M.;Siddiqi, I.;Quantum state sensitivity of an autoresonant superconducting circuit;PHYSICAL REVIEW B;86;22;220503;10.1103/PhysRevB.86.220503;DEC 7 2012;2012;When a frequency chirped excitation is applied to a classical high-Q;nonlinear oscillator, its motion becomes dynamically synchronized to the;drive and large oscillation amplitude is observed, provided the drive;strength exceeds the critical threshold for autoresonance. We;demonstrate that when such an oscillator is strongly coupled to a;quantized superconducting qubit, both the effective nonlinearity and the;threshold become a nontrivial function of the qubit-oscillator detuning.;Moreover, the autoresonant threshold is dependent on the quantum state;of the qubit and may be used to realize a high-fidelity, latching;readout whose speed is not limited by the oscillator Q.;1;0;0;0;1;1098-0121;WOS:000312024300001;;;J;Ondrejkovic, P.;Kempa, M.;Vysochanskii, Y.;Saint-Gregoire, P.;Bourges, P.;Rushchanskii, K. Z.;Hlinka, J.;Neutron scattering study of ferroelectric Sn2P2S6 under pressure;PHYSICAL REVIEW B;86;22;224106;10.1103/PhysRevB.86.224106;DEC 7 2012;2012;Ferroelectric phase transition in the semiconductor Sn2P2S6 single;crystal has been studied by means of neutron scattering in the;pressure-temperature range adjacent to the anticipated tricritical;Lifshitz point (p approximate to 0.18 GPa, T approximate to 296 K). The;observations reveal a direct ferroelectric-paraelectric phase transition;in the whole investigated pressure range (0.18-0.6 GPa). These results;are in a clear disagreement with phase diagrams assumed in numerous;earlier works, according to which a hypothetical intermediate;incommensurate phase extends over several or even tens of degrees in the;0.5 GPa pressure range. Temperature dependence of the anisotropic;quasielastic diffuse scattering suggests that polarization fluctuations;present above T-C are strongly reduced in the ordered phase. Still, the;temperature dependence of the ((2) over bar 00) Bragg reflection;intensity at p = 0.18 GPa can be remarkably well modeled assuming the;order-parameter amplitude growth according to the power law with;logarithmic corrections predicted for a uniaxial ferroelectric;transition at the tricritical Lifshitz point.;Hlinka, Jiri/G-5985-2014; Ondrejkovic, Petr/G-6654-2014; Kempa, Martin/G-8830-2014;1;0;0;0;1;1098-0121;WOS:000312024300002;;;J;Svindrych, Z.;Janu, Z.;Kozlowski, A.;Honig, J. M.;Low-temperature magnetic anomaly in magnetite;PHYSICAL REVIEW B;86;21;214406;10.1103/PhysRevB.86.214406;DEC 7 2012;2012;We have studied experimentally the responses of high-quality single;crystals of stoichiometric synthetic magnetite to applied weak dc and ac;magnetic fields in the range of 6-60 K, far below the Verwey transition.;The results can be compared to so-called magnetic after effects (MAE);measurements, which are the most extensive magnetic measurements of;magnetite at these temperatures. We present a novel point of view on the;relaxation phenomena encountered at these temperatures-the;low-temperature anomaly, addressing the striking difference between the;results of conventional ac susceptibility measurements and those;accompanying MAE measurements, i.e., periodic excitations with strong;magnetic pulses. We also draw a connection between this anomaly and the;so-called glasslike transition, and discuss possible mechanisms;responsible for these effects.;janu, zdenek/G-9113-2014;0;0;0;0;0;1098-0121;WOS:000312023100001;;;J;Tarantini, C.;Lee, S.;Kametani, F.;Jiang, J.;Weiss, J. D.;Jaroszynski, J.;Folkman, C. M.;Hellstrom, E. E.;Eom, C. B.;Larbalestier, D. C.;Artificial and self-assembled vortex-pinning centers in superconducting;Ba(Fe1-xCox)(2)As-2 thin films as a route to obtaining very high;critical-current densities;PHYSICAL REVIEW B;86;21;214504;10.1103/PhysRevB.86.214504;DEC 7 2012;2012;We report on the superior vortex pinning of single-and multilayer;Ba(Fe1-xCox)(2)As-2 thin films with self-assembled c-axis and;artificially introduced ab-plane pins. Ba(Fe1-xCox)(2)As-2 can accept a;very high density of pins (15-20 vol %) without T-c suppression. The;matching field is greater than 12 T, producing a significant enhancement;of the critical current density J(c), an almost isotropic J(c) (theta,;20 T) > 10(5) A/cm(2), and global pinning force density F-p of similar;to 50 GN/m(3). This scenario strongly differs from the high-temperature;superconducting cuprates where the addition of pins without Tc;suppression is limited to 2-4 vol %, leading to small H-Irr enhancements;and improved J(c) only below 3-5 T.;Lee, Sanghan/C-8876-2012; Eom, Chang-Beom/I-5567-2014;7;2;0;0;7;1098-0121;WOS:000312023100002;;;J;Xia, Junchao;Carter, Emily A.;Density-decomposed orbital-free density functional theory for covalently;bonded molecules and materials;PHYSICAL REVIEW B;86;23;235109;10.1103/PhysRevB.86.235109;DEC 7 2012;2012;We propose a density decomposition scheme using a Wang-Govind-Carter-;(WGC-) based kinetic energy density functional (KEDF) to accurately and;efficiently simulate various covalently bonded molecules and materials;within orbital-free (OF) density functional theory (DFT). By using a;local, density-dependent scale function, the total density is decomposed;into a highly localized density within covalent bond regions and a;flattened delocalized density, with the former described by semilocal;KEDFs and the latter treated by the WGC KEDF. The new model predicts;reasonable equilibrium volumes, bulk moduli, and phase-ordering energies;for various semiconductors compared to Kohn-Sham (KS) DFT benchmarks.;The decomposition formalism greatly improves numerical stability and;accuracy, while retaining computational speed compared to simply;applying the original WGC KEDF to covalent materials. The surface energy;of Si(100) and various diatomic molecule properties can be stably;calculated and also agree well with KSDFT benchmarks. This;linear-scaled, computationally efficient, density-partitioned,;multi-KEDF scheme opens the door to large-scale simulations of;molecules, semiconductors, and insulators with OFDFT.;7;0;0;0;7;1098-0121;WOS:000312024900001;;;J;Zhao, Yang;Gong, Shou-Shu;Wang, Yong-Jun;Su, Gang;Low-energy effective theory and two distinct critical phases in a;spin-1/2 frustrated three-leg spin tube;PHYSICAL REVIEW B;86;22;224406;10.1103/PhysRevB.86.224406;DEC 7 2012;2012;Motivated by the crystal structures of [(CuCl(2)tachH)(3)Cl]Cl-2 and;Ca3Co2O6, we develop a low-energy effective theory using the;bosonization technique for a spin-1/2 frustrated three-leg spin tube;with trigonal prism units in two limit cases. The features obtained with;the effective theory are numerically elucidated by the density matrix;renormalization group method. Three different quantum phases in the;ground state of the system, say, one gapped dimerized phase and two;distinct gapless phases, are identified, where the two gapless phases;are found to have the conformal central charge c = 1 and 3/2,;respectively. Spin gaps, spin and dimer correlation functions, and the;entanglement entropy are obtained. In particular, it is disclosed that;the critical phase with c = 3/2 is the consequence of spin frustrations,;which might belong to the SU(2)(k=2) Wess-Zumino-Witten-Novikov;universality class, and is induced by the twist term in the bosonized;Hamiltonian density.;Su, Gang/G-6092-2011;Su, Gang/0000-0002-8149-4342;1;1;0;0;1;1098-0121;WOS:000312024300003;;;J;Vucicevic, J.;Goerbig, M. O.;Milovanovic, M. V.;d-wave superconductivity on the honeycomb bilayer;PHYSICAL REVIEW B;86;21;214505;10.1103/PhysRevB.86.214505;DEC 7 2012;2012;We introduce a microscopic model on the honeycomb bilayer, which in the;small-momentum limit captures the usual (quadratic dispersion in the;kinetic term) description of bilayer graphene. In the limit of strong;interlayer hopping it reduces to an effective honeycomb monolayer model;with also third-neighbor hopping. We study interaction effects in this;effective model, focusing on possible superconducting instabilities. We;find d(x2-y2) superconductivity in the strong-coupling limit of an;effective tJ -model-like description that gradually transforms into d +;id time-reversal symmetry-breaking superconductivity at weak couplings.;In this limit the small-momentum order-parameter expansion is (k(x) +;ik(y) )(2) [or (k(x) + ik(y) )(2)] in both valleys of the effective;low-energy description. The relevance of our model and investigation for;the physics of bilayer graphene is also discussed.;5;0;0;0;5;1098-0121;WOS:000312023100004;;;J;Etzioni, Yoav;Horovitz, Baruch;Le Doussal, Pierre;Rings and Coulomb boxes in dissipative environments;PHYSICAL REVIEW B;86;23;235406;10.1103/PhysRevB.86.235406;DEC 6 2012;2012;We study a particle on a ring in the presence of a dissipative;Caldeira-Leggett environment and derive its response to a dc field. We;show how this non-equilibrium response is related to a flux averaged;equilibrium response. We find, through a two-loop renormalization group;analysis, that a large dissipation parameter eta flows to a fixed point;eta(R) = (h) over bar/(2 pi). We also reexamine the mapping of this;problem to that of the Coulomb box and show that the relaxation;resistance, of recent interest, is quantized for large eta. For finite;eta > eta(R) we find that a certain average of the relaxation resistance;is quantized. We propose a Coulomb-box experiment to measure a quantized;noise. DOI: 10.1103/PhysRevB.86.235406;1;0;0;0;1;1098-0121;WOS:000312024600004;;;J;Fontana, Yannik;Grzela, Grzegorz;Bakkers, Erik P. A. M.;Rivas, Jaime Gomez;Mapping the directional emission of quasi-two-dimensional photonic;crystals of semiconductor nanowires using Fourier microscopy;PHYSICAL REVIEW B;86;24;245303;10.1103/PhysRevB.86.245303;DEC 6 2012;2012;Controlling the dispersion and directionality of the emission of;nanosources is one of the major goals of nanophotonics research. This;control will allow the development of highly efficient nanosources even;at the single-photon level. One of the ways to achieve this goal is to;couple the emission to Bloch modes of periodic structures. Here, we;present the first measurements of the directional emission from nanowire;photonic crystals by using Fourier microscopy. With this technique, we;efficiently collect and resolve the directional emission of nanowires;within the numerical aperture of a microscope objective. The light;emission from a heterostructure grown in each nanowire is governed by;the photonic (Bloch) modes of the photonic crystal. We also demonstrate;that the directionality of the emission can be easily controlled by;infiltrating the photonic crystal with a high refractive index liquid.;This work opens new possibilities for the control of the emission of;sources in nanowires.;5;0;0;0;5;1098-0121;WOS:000312025300005;;;J;Fujimori, Shin-ichi;Ohkochi, Takuo;Okane, Tetsuo;Saitoh, Yuji;Fujimori, Atsushi;Yamagami, Hiroshi;Haga, Yoshinori;Yamamoto, Etsuji;Onuki, Yoshichika;Itinerant nature of U 5f states in uranium mononitride revealed by;angle-resolved photoelectron spectroscopy;PHYSICAL REVIEW B;86;23;235108;10.1103/PhysRevB.86.235108;DEC 6 2012;2012;The electronic structure of the antiferromagnet uranium nitride (UN) has;been studied by angle-resolved photoelectron spectroscopy (ARPES) using;soft x-rays (h nu = 420-520 eV). Strongly dispersive bands with large;contributions from the U 5f states were observed in ARPES spectra and;form Fermi surfaces. The band structure as well as the Fermi surfaces in;the paramagnetic phase are well explained by the band-structure;calculation treating all the U 5f electrons as being itinerant,;suggesting that an itinerant description of the U 5f states is;appropriate for this compound. On the other hand, changes in the;spectral function due to the antiferromagnetic transition were very;small. The shapes of the Fermi surfaces in a paramagnetic phase are;highly three-dimensional, and the nesting of Fermi surfaces is unlikely;as the origin of the magnetic ordering. DOI: 10.1103/PhysRevB.86.235108;2;0;0;0;2;1098-0121;WOS:000312024600002;;;J;Hosseini, Mir Vahid;Zareyan, Malek;Unconventional superconducting states of interlayer pairing in bilayer;and trilayer graphene;PHYSICAL REVIEW B;86;21;214503;10.1103/PhysRevB.86.214503;DEC 6 2012;2012;We develop a theory for interlayer pairing of chiral electrons in;graphene materials which results in an unconventional superconducting;state with an s-wave spin-triplet order parameter. In a pure bilayer;graphene, this superconductivity exhibits a gapless property with an;exotic effect of temperature-induced condensation causing an increase of;the pairing amplitude with increasing temperature. We find that a finite;doping opens a gap in the excitation spectrum and weakens this anomalous;temperature dependence. We further explore the possibility of realizing;a variety of pairing patterns with different topologies of the Fermi;surface, by tuning the difference in the doping of the two layers. In;trilayer graphene, the interlayer superconductivity is characterized by;a two-component order parameter which can be used to define two distinct;phases in which only one of the components is nonvanishing. For ABA;stacking the stable state is determined by a competition between these;two phases. On variation of the relative amplitude of the corresponding;coupling strength, a first-order phase transition can occur between;these two phases. For ABC stacking, we find that the two phases coexist;with the possibility of a similar phase transition, which turns out to;be second order. DOI: 10.1103/PhysRevB.86.214503;1;0;0;0;1;1098-0121;WOS:000312022700003;;;J;Kajihara, Y.;Inui, M.;Matsuda, K.;Nagao, T.;Ohara, K.;Density fluctuations at the continuous liquid-liquid phase transition in;chalcogen systems;PHYSICAL REVIEW B;86;21;214202;10.1103/PhysRevB.86.214202;DEC 6 2012;2012;We have carried out density and small-angle x-ray scattering;measurements on a typical liquid chalcogen (Te, Se) system to;investigate its continuous liquid-liquid phase transition. With;increasing temperature, the zero-wave-number structure factor S(0) shows;a maximum in the middle of the transition region where the density;exhibits negative thermal expansion. This is direct evidence of density;fluctuations induced by the liquid-liquid phase transition. When the;sample is pressurized to 100 MPa, the density and S(0) curves shift to;the lower temperature side, which is consistent with the shift of the;structural transition. We discuss the similarity between liquid Te and;liquid water from the viewpoint of fluctuations induced by the;liquid-liquid transition. DOI: 10.1103/PhysRevB.86.214202;1;0;0;0;1;1098-0121;WOS:000312022700001;;;J;Khuntia, P.;Strydom, A. M.;Wu, L. S.;Aronson, M. C.;Steglich, F.;Baenitz, M.;Field-tuned critical fluctuations in YFe2Al10: Evidence from;magnetization, Al-27 NMR, and NQR investigations;PHYSICAL REVIEW B;86;22;220401;10.1103/PhysRevB.86.220401;DEC 6 2012;2012;We report magnetization, specific heat, and NMR investigations on;YFe2Al10 over a wide range of temperature and magnetic field and zero;field (NQR) measurements. Magnetic susceptibility, specific heat, and;spin-lattice relaxation rate divided by T (1/T1T) follow a weak power;law (similar to T-0.4) temperature dependence, which is a signature of;the critical fluctuations of Fe moments. The value of the;Sommerfeld-Wilson ratio and the linear relation between 1/T1T and.;suggest the existence of ferromagnetic correlations in this system. No;magnetic ordering down to 50 mK in C-p(T)/T and the unusual T and H;scaling of the bulk and NMR data are associated with a magnetic;instability which drives the system to quantum criticality. The magnetic;properties of the system are tuned by field wherein ferromagnetic;fluctuations are suppressed and a crossover from quantum critical to;Fermi-liquid behavior is observed with increasing magnetic field.;Khuntia, Panchanan /E-4270-2010;5;1;0;0;5;1098-0121;WOS:000312023600001;;;J;Marsh, J.;Camley, R. E.;Two-wave mixing in nonlinear magnetization dynamics: A perturbation;expansion of the Landau-Lifshitz-Gilbert equation;PHYSICAL REVIEW B;86;22;224405;10.1103/PhysRevB.86.224405;DEC 6 2012;2012;Recent experiments have shown that two electromagnetic waves can be;mixed together by a nonlinear process in magnetic materials and can;produce a wide variety of output waves, each with a different frequency.;A perturbation expansion of the Landau-Lifschitz-Gilbert equation is;presented which provides qualitative and quantitative understanding of;this process. The results of this expansion are compared to both;experiment and direct numerical solutions.;1;0;0;0;1;1098-0121;WOS:000312023600004;;;J;Norris, Scott A.;Stress-induced patterns in ion-irradiated silicon: Model based on;anisotropic plastic flow;PHYSICAL REVIEW B;86;23;235405;10.1103/PhysRevB.86.235405;DEC 6 2012;2012;We present a model for the effect of stress on thin amorphous films that;develop atop ion-irradiated silicon, based on the mechanism of;ion-induced anisotropic plastic flow. Using only parameters directly;measured or known to high accuracy, the model exhibits remarkably good;agreement with the wavelengths of experimentally observed patterns and;agrees qualitatively with limited data on ripple propagation speed. The;predictions of the model are discussed in the context of other;mechanisms recently theorized to explain the wavelengths, including;extensive comparison with an alternate model of stress. DOI:;10.1103/PhysRevB.86.235405;14;0;0;0;14;1098-0121;WOS:000312024600003;;;J;Ostlin, A.;Chioncel, L.;Vitos, L.;One-particle spectral function and analytic continuation for many-body;implementation in the exact muffin-tin orbitals method;PHYSICAL REVIEW B;86;23;235107;10.1103/PhysRevB.86.235107;DEC 6 2012;2012;We investigate one of the most common analytic continuation techniques;in condensed matter physics, namely the Pade approximant. Aspects;concerning its implementation in the exact muffin-tin orbitals (EMTO);method are scrutinized with special regard towards making it stable and;free of artificial defects. The electronic structure calculations are;performed for solid hydrogen, and the performance of the analytical;continuation is assessed by monitoring the density of states constructed;directly and via the Pade approximation. We discuss the difference;between the k-integrated and k-resolved analytical continuations, as;well as describing the use of random numbers and pole residues to;analyze the approximant. It is found that the analytic properties of the;approximant can be controlled by appropriate modifications, making it a;robust and reliable tool for electronic structure calculations. At the;end, we propose a route to perform analytical continuation for the;EMTO+dynamical mean field theory method. DOI: 10.1103/PhysRevB.86.235107;0;0;0;0;0;1098-0121;WOS:000312024600001;;;J;Rauch, D.;Suellow, S.;Bleckmann, M.;Klemke, B.;Kiefer, K.;Kim, M. S.;Aronson, M. C.;Bauer, E.;Magnetic phase diagram of CePt3B1-xSix;PHYSICAL REVIEW B;86;24;245104;10.1103/PhysRevB.86.245104;DEC 6 2012;2012;We present a study of the main bulk properties (susceptibility,;magnetization, resistivity, and specific heat) of CePt3B1-xSix, an;alloying system that crystallizes in a noncentrosymmetric lattice, and;derive the magnetic phase diagram. The materials at the end point of the;alloying series have previously been studied, with CePt3B established as;a material with two different magnetic phases at low temperatures;(antiferromagnetic below T-N = 7.8 K, weakly ferromagnetic below T-C;approximate to 5 K), while CePt3Si is a heavy fermion superconductor;(T-c = 0.75 K) coexisting with antiferromagnetism (T-N = 2.2 K). From;our experiments we conclude that the magnetic phase diagram is divided;into two regions. In the region of low Si content (up to x similar to;0.7) the material properties resemble those of CePt3B. Upon increasing;the Si concentration further the magnetic ground state continuously;transforms into that of CePt3Si. In essence, we argue that CePt3B can be;understood as a low pressure variant of CePt3Si.;Kiefer, Klaus/J-3544-2013; Klemke, Bastian/J-4746-2013;Kiefer, Klaus/0000-0002-5178-0495; Klemke, Bastian/0000-0003-4560-6025;0;0;0;0;0;1098-0121;WOS:000312025300004;;;J;Schoenecker, Stephan;Richter, Manuel;Koepernik, Klaus;Eschrig, Helmut;Ferromagnetic elements by epitaxial growth: A density functional;prediction (vol 85, 024407, 2012);PHYSICAL REVIEW B;86;21;219901;10.1103/PhysRevB.86.219901;DEC 6 2012;2012;0;0;0;0;0;1098-0121;WOS:000312022700004;;;J;Sedlmeier, Katrin;Elsaesser, Sebastian;Neubauer, David;Beyer, Rebecca;Wu, Dan;Ivek, Tomislav;Tomic, Silvia;Schlueter, John A.;Dressel, Martin;Absence of charge order in the dimerized kappa-phase BEDT-TTF salts;PHYSICAL REVIEW B;86;24;245103;10.1103/PhysRevB.86.245103;DEC 6 2012;2012;Utilizing infrared vibrational spectroscopy we have investigated;dimerized two-dimensional organic salts in order to search for possible;charge redistribution that might constitute electronic dipoles and;ferroelectricity: the quantum spin liquid kappa-(BEDT-TTF)(2)Cu-2(CN)(3);[BEDT-TTF: bis-(ethylenedithio)tetrathiafulvalene], the;antiferromagnetic Mott insulator kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl, and;the superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br. None of them;exhibit any indication of charge disproportionation. Upon cooling to low;temperatures all BEDT-TTF molecules remain homogeneously charged within;+/- 0.005e. No modification in the charge distribution is observed;around T = 6 K where a low-temperature anomaly has been reported for the;spin-liquid material kappa-(BEDT-TTF)(2)Cu-2(CN)(3). In this compound;the in-plane optical response and vibrational coupling are rather;anisotropic, indicating that the tilt of the BEDT-TTF molecules in c;direction and their coupling to the anion layers has to be considered in;the explanation of the electromagnetic properties.;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;14;0;0;0;14;1098-0121;WOS:000312025300003;;;J;Siloi, I.;Troiani, F.;Towards the chemical tuning of entanglement in molecular nanomagnets;PHYSICAL REVIEW B;86;22;224404;10.1103/PhysRevB.86.224404;DEC 6 2012;2012;Antiferromagnetic spin rings represent prototypical realizations of;highly correlated, low-dimensional systems. Here we theoretically show;how the introduction of magnetic defects by controlled chemical;substitutions results in a strong spatial modulation of spin-pair;entanglement within each ring. Entanglement between local degrees of;freedom (individual spins) and collective ones (total ring spins) are;shown to coexist in exchange-coupled ring dimers, as can be deduced from;general symmetry arguments. We verify the persistence of these features;at finite temperatures, and discuss them in terms of experimentally;accessible observables.;Troiani, Filippo/B-4787-2011;5;0;0;0;5;1098-0121;WOS:000312023600003;;;J;Sreenivasulu, G.;Petrov, V. M.;Fetisov, L. Y.;Fetisov, Y. K.;Srinivasan, G.;Magnetoelectric interactions in layered composites of piezoelectric;quartz and magnetostrictive alloys;PHYSICAL REVIEW B;86;21;214405;10.1103/PhysRevB.86.214405;DEC 6 2012;2012;Mechanical strain mediated magnetoelectric effects are studied in;bilayers and trilayers of piezoelectric quartz and magnetostrictive;permendur (P), an alloy of Fe-Co-V. It is shown that the magnetoelectric;voltage coefficient (MEVC), proportional to the ratio of the;piezoelectric coupling coefficient to the permittivity, is higher in;quartz-based composites than for traditional ferroelectrics-based ME;composites. In bilayers of X-cut single crystal quartz and permendur,;the MEVC varies from 1.5 V/cm Oe at 20 Hz to similar to 185 V/cm Oe at;bending resonance or electromechanical resonance corresponding to;longitudinal acoustic modes. In symmetric X-cut quartz-P trilayers, the;MEVC similar to 4.8 V/cm Oe at 20 Hz and similar to 175 V/cm Oe at;longitudinal acoustic resonance. Trilayers of Y-cut quartz and permendur;show ME coupling under a shear strain with an MEVC that is an order of;magnitude smaller than for longitudinal strain in samples with X-cut;quartz. A model for low-frequency and resonance ME effects which allows;for explicit expressions of MEVC and resonance frequencies is provided;and calculated. MEVCs are in general agreement with measured values.;Magnetoelectric composites with quartz have the desired characteristics;such as the absence of ferroelectric hysteresis and pyroelectric losses;and could potentially replace ferroelectrics in composite-based magnetic;sensors, transducers, and high-frequency devices. DOI:;10.1103/PhysRevB.86.214405;Gollapudi, Sreenivasulu/G-9832-2012;Gollapudi, Sreenivasulu/0000-0002-6136-7119;8;0;0;0;8;1098-0121;WOS:000312022700002;;;J;Syzranov, S. V.;Yevtushenko, O. M.;Efetov, K. B.;Fermionic and bosonic ac conductivities at strong disorder;PHYSICAL REVIEW B;86;24;241102;10.1103/PhysRevB.86.241102;DEC 6 2012;2012;We study the ac conduction in a system of fermions or bosons strongly;localized in a disordered array of sites with short-range interactions;at frequencies larger than the intersite tunneling but smaller than the;characteristic fluctuation of the on-site energy. While the main;contribution sigma(0)(omega) to the conductivity comes from local;dipole-type excitations on close pairs of sites, coherent processes on;three or more sites lead to an interference correction sigma(1)(omega),;which depends on the statistics of the charge carriers and can be;suppressed by a magnetic field. For bosons the correction is always;positive, while for fermions it can be positive or negative depending on;whether the conduction is dominated by effective single-particle or;single-hole processes. We calculate the conductivity explicitly assuming;a constant density of states of single-site excitations. Independently;of the statistics, sigma(0)(omega) = const. For bosons, sigma(1)(omega);proportional to log(C/omega). For fermions, sigma(1)(omega) proportional;to log[max(A,omega)/omega] - log[max(B,omega)/omega], where the first;and the second term are, respectively, the particle and hole;contributions, A and B being the particle and hole energy cutoffs. The;ac magnetoresistance has the same sign as sigma(1)(omega).;Efetov, Konstantin/H-8852-2013;0;0;0;0;0;1098-0121;WOS:000312025300001;;;J;Troeppner, C.;Schmitt, T.;Reuschl, M.;Hammer, L.;Schneider, M. A.;Mittendorfer, F.;Redinger, J.;Podloucky, R.;Weinert, M.;Incommensurate Moire overlayer with strong local binding: CoO(111);bilayer on Ir(100);PHYSICAL REVIEW B;86;23;235407;10.1103/PhysRevB.86.235407;DEC 6 2012;2012;Incommensurate relaxed overlayer Moire structures are often interpreted;as systems with weak lateral variations of the binding potential and;thus no structural modulations in the overlayer material. We discuss;here the example of a CoO(111) bilayer on Ir(100), which is a relaxed;overlayer with strong structural response to the lateral modulation of;interface properties but nevertheless is incommensurate. By means of;density functional theory (DFT) calculations, we quantitatively;reproduce all the structural parameters of the CoO(111) bilayer on;Ir(100) as proposed by a recent low-energy electron diffraction analysis;[Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations;predict energetic degeneracies with respect to registry shifts of the;CoO(111) film along [01 (1) over bar]. Large-scale, low-temperature;scanning tunneling microscopy topographies reveal that the true;structure of the film is incommensurate in this direction, exhibiting a;one-dimensional Moire pattern with a period of about 9.4 a(Ir). From DFT;calculations for limiting (periodic) models, we can sample the potential;landscape of the cobalt and oxygen atoms in the Moire structure across;the Ir(100) unit cell. We find that despite the non-commensurability of;the film, the binding to the substrate is site specific with strong;attraction and repulsion points for both cobalt and oxygen atoms,;leading to severe local distortions in the film. The lateral modulation;of the structural elements within the oxide film can be understood as a;combination of the lateral variation in the Co-Ir binding potential and;additional O-Ir binding. DOI: 10.1103/PhysRevB.86.235407;Schneider, M. Alexander/C-6241-2013; Hammer, Lutz/D-9863-2013; Schneider, M. Alexander/B-4444-2012; Mittendorfer, Florian/L-5929-2013;Schneider, M. Alexander/0000-0002-8607-3301;;3;0;0;0;3;1098-0121;WOS:000312024600005;;;J;Tyunina, M.;Dejneka, A.;Chvostova, D.;Levoska, J.;Plekh, M.;Jastrabik, L.;Phase transitions in ferroelectric Pb0.5Sr0.5TiO3 films probed by;spectroscopic ellipsometry;PHYSICAL REVIEW B;86;22;224105;10.1103/PhysRevB.86.224105;DEC 6 2012;2012;Phase transitions occurring in 130-nm-thick films of;perovskite-structure ferroelectric Pb0.5Sr0.5TiO3 are experimentally;studied by combining spectroscopic ellipsometry and low-frequency;dielectric analysis. Polycrystalline and polydomain epitaxial films with;relaxed misfit strain and columnar microstructure are investigated. The;paraelectric and the ferroelectric states, and the temperatures and;widths of the paraelectric-to-ferroelectric phase transitions, are;identified from the temperature evolution of refractive index measured;in transparency range. The temperatures at which transitions start on;cooling are found to be considerably higher than the temperatures of the;dielectric peaks. In contrast to the broad dielectric peaks, the;transition width of 60 K in the polycrystalline film and that of 20 K in;the polydomain epitaxial film are revealed. The discrepancies between;optical and dielectric data are explained by the influence of extrinsic;factors on the low-frequency response of the thin-film capacitors. It is;suggested that fundamental mechanisms of ferroelectric phase transitions;in thin films can be revealed by studies of thermo-optical properties.;Dejneka, Alexandr/G-6384-2014; Jastrabik, Lubomir /H-1217-2014; Chvostova, Dagmar/G-9360-2014;6;0;0;0;6;1098-0121;WOS:000312023600002;;;J;Zeng, Hualing;Zhu, Bairen;Liu, Kai;Fan, Jiahe;Cui, Xiaodong;Zhang, Q. M.;Low-frequency Raman modes and electronic excitations in atomically thin;MoS2 films;PHYSICAL REVIEW B;86;24;241301;10.1103/PhysRevB.86.241301;DEC 6 2012;2012;Atomically thin MoS2 crystals have been recognized as;quasi-two-dimensional semiconductors with remarkable physical;properties. We report our Raman scattering measurements on multilayer;and monolayer MoS2, especially in the low-frequency range (<50 cm(-1)).;We find two low-frequency Raman modes with a contrasting thickness;dependence. When increasing the number of MoS2 layers, one mode shows a;significant increase in frequency while the other decreases following a;1/N (N denotes the number of unit layers) trend. With the aid of;first-principles calculations we assign the former as the shear mode;E-2g(2). The latter is distinguished as the compression vibrational;mode, similar to the surface vibration of other epitaxial thin films.;The opposite evolution of the two modes with thickness demonstrates;vibrational modes in an atomically thin crystal as well as a more;precise way to characterize the thickness of atomically thin MoS2 films.;In addition, we observe a broad feature around 38 cm(-1) (5 meV) which;is visible only under near-resonance excitation and pinned at a fixed;energy, independent of thickness. We interpret the feature as an;electronic Raman scattering associated with the spin-orbit coupling;induced splitting in a conduction band at K points in their Brillouin;zone.;Liu, Kai/K-4157-2012; Cui, Xiaodong/C-2023-2009; Zeng, Hualing/J-4411-2014;Cui, Xiaodong/0000-0002-2013-8336;;19;1;0;0;19;1098-0121;WOS:000312025300002;;;J;Anand, V. K.;Johnston, D. C.;Observation of a phase transition at 55 K in single-crystal CaCu1.7As2;PHYSICAL REVIEW B;86;21;214501;10.1103/PhysRevB.86.214501;DEC 5 2012;2012;We present the structural, magnetic, thermal and ab-plane electronic;transport properties of single crystals of CaCu1.7As2 grown by the;self-flux technique that were investigated by powder x-ray diffraction,;magnetic susceptibility chi, isothermal magnetization M, specific heat;C-p, and electrical resistivity rho measurements as a function of;temperature T and magnetic field H. X-ray diffraction analysis of;crushed crystals at room temperature confirm the collapsed tetragonal;ThCr2Si2-type structure with similar to 15% vacancies on the Cu sites as;previously reported, corresponding to the composition CaCu1.7As2. The;chi(T) data are diamagnetic, anisotropic, and nearly independent of T.;The chi is larger in the ab plane than along the c axis, as also;observed previously for SrCu2As2 and for pure and doped BaFe2As2. The;C-p(T) and rho(T) data indicate metallic sp-band character. In contrast;to the rho(T) and C-p(T) data that do not show any evidence for phase;transitions below 300 K, the rho(T) data exhibit a sharp decrease on;cooling below a temperature T-t = 54-56 K, depending on the crystal. The;chi(T) data show no hysteresis on warming and cooling through T-t and;the transition thus appears to be second order. The phase transition may;arise from spatial ordering of the vacancies on the Cu sublattice. The;T-t is found to be independent of H for H <= 8 T. A positive;magnetoresistance is observed below T-t that increases with decreasing T;and attains a value in H = 8.0 T of 8.7% at T = 1.8 K.;Anand, Vivek Kumar/J-3381-2013;Anand, Vivek Kumar/0000-0003-2023-7040;5;0;0;0;5;1098-0121;WOS:000311910400003;;;J;Avetisyan, Siranush;Pietilaeinen, Pekka;Chakraborty, Tapash;Strong enhancement of Rashba spin-orbit coupling with increasing;anisotropy in the Fock-Darwin states of a quantum dot (vol 85, 153301,;2012);PHYSICAL REVIEW B;86;23;239901;10.1103/PhysRevB.86.239901;DEC 5 2012;2012;1;0;0;0;1;1098-0121;WOS:000311911500005;;;J;Berman, Oleg L.;Kezerashvili, Roman Ya.;Ziegler, Klaus;Superfluidity and collective properties of excitonic polaritons in;gapped graphene in a microcavity;PHYSICAL REVIEW B;86;23;235404;10.1103/PhysRevB.86.235404;DEC 5 2012;2012;We predict the formation and superfluidity of polaritons in an optical;microcavity formed by excitons in gapped graphene embedded there and;microcavity photons. The Rabi splitting related to the creation of an;exciton in a graphene layer in the presence of the band gap is obtained.;It is demonstrated that the Rabi splitting decreases when the energy gap;increases, while the larger value of the dielectric constant of the;microcavity gives a smaller value for the Rabi splitting. The analysis;of collective excitations as well as the sound velocity is presented. We;show that the superfluid density n(s) and temperature of the;Kosterlitz-Thouless phase transition T-c are decreasing functions of the;energy gap.;2;0;0;0;2;1098-0121;WOS:000311911500004;;;J;Bernu, S.;Fertey, P.;Itie, J. -P.;Berger, H.;Foury-Leylekian, P.;Pouget, J. -P.;Vanishing of the metal-insulator Peierls transition in pressurized BaVS3;PHYSICAL REVIEW B;86;23;235105;10.1103/PhysRevB.86.235105;DEC 5 2012;2012;BaVS3 presents a metal-to-insulator (MI) transition at ambient pressure;due to the stabilization of a 2k(F) commensurate charge density wave;(CDW) Peierls ground state built on the dz(2) V orbitals. The MI;transition vanishes under pressure at a quantum critical point (QCP);where the electronic properties exhibit a non-Fermi liquid behavior. In;this paper, we determine the CDW phase diagram under pressure and show;that it combines both the vanishing of the second-order Peierls;transition and a commensurate-incommensurate first-order delocking;transition of the 2k(F) wave vector. We explain quantitatively the drop;of the MI critical temperature by the decrease of the electron-hole pair;lifetime of the CDW condensate due to an enhancement of the;hybridization between the dz(2) and e(t(2g)) levels of the V under;pressure.;0;0;0;0;0;1098-0121;WOS:000311911500001;;;J;Bobaru, S.;Gaudry, E.;de Weerd, M. -C.;Ledieu, J.;Fournee, V.;Competing allotropes of Bi deposited on the Al13Co4(100) alloy surface;PHYSICAL REVIEW B;86;21;214201;10.1103/PhysRevB.86.214201;DEC 5 2012;2012;The growth and stability of Bi thin films on the Al13Co4(100) surface;has been investigated from the submonolayer to high-coverage regime by;scanning tunneling microscopy (STM) and low-energy electron diffraction;(LEED) for temperatures ranging from 57 to 633 K. Initially, Bi;adsorption leads to the formation of a pseudomorphic monolayer, followed;by the growth of islands of different heights with increasing coverage.;The in-plane structure, island height, and island morphology indicate;that these islands adopt either a pseudocubic (110) or hexagonal (111);orientation normal to the surface. The (110)-oriented islands correspond;to bilayer stacking (either two or four monolayers in height) while the;(111)-oriented islands correspond to either three-or four-layer;stacking. The in-plane orientation of (110) islands with respect to the;substrate is random, while (111) islands adopt one of four possible;orientations. In addition, the (111) islands show a moire structure. The;fact that Bi islands grow with either (110) or (111) orientation;simultaneously on the same substrate relates to a subtle energy balance;between both orientations according to ab initio calculations, allowing;both structures to coexist. The island density dependence versus both;deposition temperature and flux, their most frequent structure type,;reshaping effects, and chemical reactivity of the different allotropes;are also discussed in this paper.;Gaudry, Emilie/G-9682-2011; Ledieu, Julian/F-1430-2010;2;0;0;0;2;1098-0121;WOS:000311910400002;;;J;Czarnik, Piotr;Cincio, Lukasz;Dziarmaga, Jacek;Projected entangled pair states at finite temperature: Imaginary time;evolution with ancillas;PHYSICAL REVIEW B;86;24;245101;10.1103/PhysRevB.86.245101;DEC 5 2012;2012;A projected entangled pair state (PEPS) with ancillas is evolved in;imaginary time. This tensor network represents a thermal state of a;two-dimensional (2D) lattice quantum system. A finite-temperature phase;diagram of the 2D quantum Ising model in a transverse field is obtained;as a benchmark application.;2;0;0;0;2;1098-0121;WOS:000311912300002;;;J;de Jong, Maarten;Olmsted, David L.;van de Walle, Axel;Asta, Mark;First-principles study of the structural and elastic properties of;rhenium-based transition-metal alloys;PHYSICAL REVIEW B;86;22;224101;10.1103/PhysRevB.86.224101;DEC 5 2012;2012;Structural, energetic, and elastic properties of hexagonal-close-packed;rhenium-based transition-metal alloys are computed by density-functional;theory. The practical interest in these materials stems from the;attractive combination of mechanical properties displayed by rhenium for;structural applications requiring the combination of high melting;temperature and low-temperature ductility. Single-crystal elastic;constants, atomic volumes, axial c/a ratios, and dilute heats of;solution for Re-X alloys are computed, considering all possible;transition-metal solute species X. Calculated elastic constants are used;to compute values of a commonly considered intrinsic-ductility parameter;K/G, where K is the bulk modulus and G denotes the Voigt average of the;shear modulus, as well as the anisotropies in the Young's modulus and;shear modulus. The calculated properties show clear trends as a function;of d-band filling, which can be rationalized through tight-binding;theory. The results indicate that solutes to the left of rhenium in the;periodic table show a tendency to increase the intrinsic ductility;parameter, a trend that correlates with an increase of the c/a ratio;towards the ideal value associated optimal close packing. The Young's;modulus shows a trend towards increasing isotropy with alloying of;solutes X to the left of Re, while the shear modulus shows the opposite;trend but with an overall weaker dependence on solute additions. DOI:;10.1103/PhysRevB.86.224101;van de Walle, Axel/L-5676-2013;van de Walle, Axel/0000-0002-3415-1494;0;0;0;0;0;1098-0121;WOS:000311910900001;;;J;Fingerhut, Benjamin P.;Richter, Marten;Luo, Jun-Wei;Zunger, Alex;Mukamel, Shaul;Dissecting biexciton wave functions of self-assembled quantum dots by;double-quantum-coherence optical spectroscopy;PHYSICAL REVIEW B;86;23;235303;10.1103/PhysRevB.86.235303;DEC 5 2012;2012;Biexcitons feature prominently in various scenarios for utilization of;quantum dots (QDs) for enhancing the efficiencies of solar cells, and;for the generation of entangled photon pairs in single QD sources.;Two-dimensional double quantum coherence (2D-DQC) nonlinear optical;spectra provide novel spectroscopic signatures of such states beyond;global intensity and lifetime characteristics which are available by;more conventional techniques. We report the simulation of a prototype;2D-DQC optical experiment of a self-assembled InAs/GaAs dot. The;simulations consider the QD in different charged states and are based on;a state-of-the-art atomistic many-body pseudopotential method for the;calculation of the electronic structure and transition dipole matrix;elements. Comparison of the spectra of negatively charged, neutral, and;positively charged QD reveals optical signatures of their electronic;excitations. This technique directly accesses the biexciton (XX);energies as well as the projections of their wave functions on the;single-exciton manifold. These signals also provide a unique tool for;probing the charged state of the QD and thus the occupation of the;quantum state. Signatures of Pauli blockade of the creation of certain;single and two excitons due to charges on the particles are observed.;For all quantum states of the QD, the spectra reveal a strong;multiconfiguration character of the biexciton wave functions. Peak;intensities can be explained by interference of the contributing;Liouville space pathways.;Zunger, Alex/A-6733-2013; LUO, JUNWEI/B-6545-2013; LUO, JUN-WEI/A-8491-2010; Richter, Marten/B-7790-2008;Richter, Marten/0000-0003-4160-1008;2;0;0;0;2;1098-0121;WOS:000311911500003;;;J;Haskins, Justin B.;Moriarty, John A.;Hood, Randolph Q.;Polymorphism and melt in high-pressure tantalum;PHYSICAL REVIEW B;86;22;224104;10.1103/PhysRevB.86.224104;DEC 5 2012;2012;Recent small-cell (<150 atom) quantum molecular dynamics (QMD);simulations for Ta based on density functional theory (DFT) have;predicted a hexagonal omega (hex-omega)phase more stable than the normal;bcc phase at high temperature (T) and pressure (P) above 70 GPa [;Burakovsky et al., Phys. Rev. Lett. 104, 255702 (2010)]. Here we examine;possible high-T, P polymorphism in Ta with complementary DFT-based model;generalized pseudopotential theory (MGPT) multi-ion interatomic;potentials, which allow accurate treatment of much larger system sizes;(up to similar to 80000 atoms). We focus on candidate bcc, A15, fcc,;hcp, and hex-omega phases for the high-T, P phase diagram to 420 GPa,;studying the mechanical and relative thermodynamic stability of these;phases for both small and large computational cells. Our MGPT potentials;fully capture the T = 0 DFT energetics of these phases, while MGPT-MD;simulations demonstrate that the higher-energy fcc, hcp, and hex-omega;structures are only mechanically stabilized at high temperature by;large, size-dependent, anharmonic vibrational effects, with the;stability of the hex-omega phase also being found to be a sensitive;function of its c/a ratio. Both two-phase and Z-method melting;techniques have been used in MGPT-MD simulations to determine relative;phase stability and its size dependence. In the large-cell limit, the;two-phase method yields accurate equilibrium melt curves for all five;phases, with bcc producing the highest melt temperatures at all;pressures and hence being the most stable phase of those considered. The;two-phase bcc melt curve is also in good agreement with dynamic;experimental data as well as with the MGPT melt curve calculated from;bcc and liquid free energies. In contrast, we find that the Z method;produces only an upper bound to the equilibrium melt curve in the;large-cell limit. For the bcc and hex-omega structures, however, this is;a close upper bound within 5% of the two-phase results, although for the;A15, fcc, and hcp structures, the Z-melt curves are 25%-35% higher in;temperature than the two-phase results. Nonetheless, the Z method has;allowed us to study melt size effects in detail. We find these effects;to be either small or modest for the cubic bcc, A15, and fcc structures,;but to have a large impact on the hexagonal hcp and hex-omega melt;curves, which are dramatically pushed above that of bcc for simulation;cells less than 150 atoms. The melt size effects are driven by and;closely correlated with similar size effects on the mechanical stability;and the vibrational anharmonicity. We further show that for the same;simulation cell sizes and choice of c/a ratio, the MGPT-MD bcc and;hex-omega melt curves are in good agreement with the QMD results, so the;QMD prediction is confirmed in the small-cell limit. But in the;large-cell limit, the MGPT-MD hex-omega melt curve is always lowered;below that of bcc for any choice of c/a, so bcc is the most stable;phase. We conclude that for the non-bcc Ta phases studied, one requires;simulation cells of at least 250-500 atoms to be free of size effects;impacting mechanical and thermodynamic phase stability. DOI:;10.1103/PhysRevB.86.224104;8;0;0;0;8;1098-0121;WOS:000311910900004;;;J;Iwazaki, Yoshiki;Suzuki, Toshimasa;Mizuno, Youichi;Tsuneyuki, Shinji;Doping-induced phase transitions in ferroelectric BaTiO3 from;first-principles calculations;PHYSICAL REVIEW B;86;21;214103;10.1103/PhysRevB.86.214103;DEC 5 2012;2012;Carrier-electron-induced phase transition from tetragonal to cubic;phases in BaTiO3 is studied using first-principles calculation. Our;results show that the disappearance of the ferroelectric phase is an;intrinsic effect resulting from carrier electron doping in BaTiO3. We;further clarify that the lattice disorder induced by donor dopants such;as oxygen vacancies and substitutionally doped Nb5+ at Ti4+ sites;accelerates the disappearance of the tetragonal phase in BaTiO3.;7;0;0;0;7;1098-0121;WOS:000311910400001;;;J;Koshelev, A. E.;Phase diagram of Josephson junction between s and s(+/-) superconductors;in the dirty limit;PHYSICAL REVIEW B;86;21;214502;10.1103/PhysRevB.86.214502;DEC 5 2012;2012;The s(+/-) state in which the order parameter has different signs in;different bands is a leading candidate for the superconducting state in;the iron-based superconductors. We investigate a Josephson junction;between s and s(+/-) superconductors within microscopic theory.;Frustration, caused by interaction of the s-wave gap parameter with the;opposite-sign gaps of the s(+/-) superconductor, leads to nontrivial;phase diagram. When the partial Josephson coupling energy between the;s-wave superconductor and one of the s(+/-) bands dominates, s-wave gap;parameter aligns with the order parameter in this band. In this case,;the partial Josephson energies have different signs corresponding to;signs of the gap parameters. In the case of strong frustration,;corresponding to almost complete compensation of the total Josephson;energy, a nontrivial time-reversal-symmetry breaking (TRSB) state;realizes. In this state, all gap parameters become essentially complex.;As a consequence, this state provides realization for so-called;phi-junction with finite phase difference in the ground state. The width;of the TRSB state region is determined by the second harmonic in;Josephson current, proportional to sin(2 phi f), which appears in the;second order with respect to the boundary transparency. Using the;microscopic theory, we establish a range of parameters where different;states are realized. Our analysis shows insufficiency of the simple;phenomenological approach for treatment of this problem.;Koshelev, Alexei/K-3971-2013;Koshelev, Alexei/0000-0002-1167-5906;3;0;0;0;3;1098-0121;WOS:000311910400004;;;J;Krueger, Peter;Koutiri, Issam;Bourgeois, Sylvie;First-principles study of hexagonal tungsten trioxide: Nature of lattice;distortions and effect of potassium doping;PHYSICAL REVIEW B;86;22;224102;10.1103/PhysRevB.86.224102;DEC 5 2012;2012;A density functional theory study is reported on pure and potassium;doped tungsten trioxide. The nature of lattice distortions in the;hexagonal phase is analyzed and a new symmetry group is proposed. The;structure and stability of cubic, monoclinic, and hexagonal phases is;studied as a function of potassium doping and an approximate phase;diagram is derived. KxWO3 undergoes a monoclinic to hexagonal phase;transition at x similar to 3%. DOI: 10.1103/PhysRevB.86.224102;1;0;0;0;1;1098-0121;WOS:000311910900002;;;J;Landsgesell, S.;Abou-Ras, D.;Alber, D.;Prokes, K.;Wolf, T.;Direct evidence of chemical and crystallographic phase separation in;K0.65Fe1.74Se2;PHYSICAL REVIEW B;86;22;224502;10.1103/PhysRevB.86.224502;DEC 5 2012;2012;In the present work, we report on a chemical phase separation in;crystalline superconducting K0.65Fe1.74Se2, investigated by means of;magnetization experiments, scanning electron microscopy, electron;backscatter diffraction, and energy-dispersive x-ray spectrometry. It is;shown that the crystal consists of platelets oriented in < 100 > with an;approximated volume fraction of about 30% in the surrounding < 001 >;oriented matrix. The platelets (the matrix) are depleted in K (Fe) and;enriched in Fe (K). Chemical phase separation is demonstrated by a;stable, antiferromagnetic K0.8Fe1.6Se2 matrix, and KxFe2-y Se-2;platelets inducing superconductivity. This time-driven, chemical phase;separation is therefore responsible for various coexistent magnetic and;electrical properties measured in KxFeySe2 samples. DOI:;10.1103/PhysRevB.86.224502;Landsgesell, Sven/B-1467-2013; Prokes, Karel/J-5438-2013;Landsgesell, Sven/0000-0002-2469-3548; Prokes, Karel/0000-0002-7034-1738;10;0;0;0;10;1098-0121;WOS:000311910900005;;;J;Liu, Wei;Carrasco, Javier;Santra, Biswajit;Michaelides, Angelos;Scheffler, Matthias;Tkatchenko, Alexandre;Benzene adsorbed on metals: Concerted effect of covalency and van der;Waals bonding;PHYSICAL REVIEW B;86;24;245405;10.1103/PhysRevB.86.245405;DEC 5 2012;2012;The adsorption of aromatic molecules on metal surfaces plays a key role;in condensed matter physics and functional materials. Depending on the;strength of the interaction between the molecule and the surface, the;binding is typically classified as either physisorption or;chemisorption. Van der Waals (vdW) interactions contribute significantly;to the binding in physisorbed systems, but the role of the vdW energy in;chemisorbed systems remains unclear. Here we study the interaction of;benzene with the (111) surface of transition metals, ranging from weak;adsorption (Ag and Au) to strong adsorption (Pt, Pd, Ir, and Rh). When;vdW interactions are accurately accounted for, the barrier to adsorption;predicted by standard density-functional theory (DFT) calculations;essentially vanishes, producing a metastable precursor state on Pt and;Ir surfaces. Notably, vdW forces contribute more to the binding of;covalently bonded benzene than they do when benzene is physisorbed.;Comparison to experimental data demonstrates that some of the recently;developed methods for including vdW interactions in DFT allow;quantitative treatment of both weakly and strongly adsorbed aromatic;molecules on metal surfaces, extending the already excellent performance;found for molecules in the gas phase.;Michaelides, Angelos/K-8727-2012; Santra, Biswajit/C-4818-2008; Tkatchenko, Alexandre/E-7148-2011;Santra, Biswajit/0000-0003-3609-2106; Tkatchenko,;Alexandre/0000-0002-1012-4854;52;2;0;0;52;1098-0121;WOS:000311912300005;;;J;Ou, Xin;Koegler, Reinhard;Zhou, Hong-Bo;Anwand, Wolfgang;Grenzer, Joerg;Huebner, Rene;Voelskow, Matthias;Butterling, Maik;Zhou, Shengqiang;Skorupa, Wolfgang;Release of helium from vacancy defects in yttria-stabilized zirconia;under irradiation;PHYSICAL REVIEW B;86;22;224103;10.1103/PhysRevB.86.224103;DEC 5 2012;2012;Fission gas retention or release has a critical impact on the function;of advanced nuclear materials. Helium trapping in, and release from,;radiation defects induced by neutrons and by a decay in YSZ;(yttria-stabilized zirconia) is experimentally simulated using;synchronized Zr+ and He+ dual ion beam irradiation. The measured damage;profiles consist of two peaks which agree well with the calculated;profiles of implantation induced excess point defects. This special;implantation related effect has to be carefully considered in the;evaluation of experimental investigations which simulate isotropic;irradiation effects such as a decay. First-principles calculations show;that helium is energetically favorable to be trapped by Zr vacancies in;YSZ. Implanted helium alone in YSZ is accumulated in undesirable helium;bubbles and results in local surface swelling and lift-off. However,;under dual beam irradiation helium is released from vacancy defects and;is out-diffused at room temperature. Helium is mobilized by a;vacancy-assisted trapping/detrapping mechanism induced by the;simultaneous Zr+ ion implantation. This behavior avoids the deleterious;helium bubble formation and contributes to the suitable application;characteristics of YSZ which result in its excellent radiation hardness.;DOI: 10.1103/PhysRevB.86.224103;Zhou, Shengqiang/C-1497-2009;Zhou, Shengqiang/0000-0002-4885-799X;3;0;2;0;3;1098-0121;WOS:000311910900003;;;J;Pauly, C.;Bihlmayer, G.;Liebmann, M.;Grob, M.;Georgi, A.;Subramaniam, D.;Scholz, M. R.;Sanchez-Barriga, J.;Varykhalov, A.;Bluegel, S.;Rader, O.;Morgenstern, M.;Probing two topological surface bands of Sb2Te3 by spin-polarized;photoemission spectroscopy;PHYSICAL REVIEW B;86;23;235106;10.1103/PhysRevB.86.235106;DEC 5 2012;2012;Using high-resolution spin-and angle-resolved photoemission;spectroscopy, we map the electronic structure and spin texture of the;surface states of the topological insulator Sb2Te3. In combination with;density functional calculations (DFT), we directly show that Sb2Te3;exhibits a partially occupied, single spin-Dirac cone around the Fermi;energy E-F, which is topologically protected. DFT obtains a spin;polarization of the occupied Dirac cone states of 80-90%, which is in;reasonable agreement with the experimental data after careful background;subtraction. Furthermore, we observe a strongly spin-orbit split surface;band at lower energy. This state is found at E - E-F similar or equal to;-0.8 eV at the (Gamma) over bar point, disperses upward, and disappears;at about E - E-F = -0.4 eV into two different bulk bands. Along the;(Gamma) over bar-(K) over bar direction, the band is located within a;spin-orbit gap. According to an argument given by Pendry and Gurman in;1975, such a gap must contain a surface state, if it is located away;from the high-symmetry points of the Brillouin zone. Thus, the novel;spin-split state is protected by symmetry, too.;Bihlmayer, Gustav/G-5279-2013; Rader, Oliver/H-8498-2013; Sanchez-Barriga, Jaime/I-3493-2013; Varykhalov, Andrei/I-3571-2013; Blugel, Stefan/J-8323-2013; Liebmann, Marcus/G-6254-2012; Morgenstern, Markus/K-7785-2013;Bihlmayer, Gustav/0000-0002-6615-1122; Rader,;Oliver/0000-0003-3639-0971; Sanchez-Barriga, Jaime/0000-0001-9947-6700;;Varykhalov, Andrei/0000-0002-7901-3562; Blugel,;Stefan/0000-0001-9987-4733; Liebmann, Marcus/0000-0003-4787-0129;;Morgenstern, Markus/0000-0002-3993-6880;15;0;0;0;15;1098-0121;WOS:000311911500002;;;J;Silveirinha, Mario G.;Engheta, Nader;Metamaterial-inspired model for electron waves in bulk semiconductors;PHYSICAL REVIEW B;86;24;245302;10.1103/PhysRevB.86.245302;DEC 5 2012;2012;Based on an analogy with electromagnetic metamaterials, we develop an;effective medium description for the propagation of electron matter;waves in bulk semiconductors with a zinc-blende structure. It is;formally demonstrated that even though departing from a different;starting point, our theory gives results for the energy stationary;states consistent with Bastard's envelope-function approximation in the;long-wavelength limit. Using the proposed approach, we discuss the time;evolution of a wave packet in a bulk semiconductor with a zero-gap and;linear energy-momentum dispersion.;4;0;0;0;4;1098-0121;WOS:000311912300004;;;J;Valla, T.;Ji, Huiwen;Schoop, L. M.;Weber, A. P.;Pan, Z. -H.;Sadowski, J. T.;Vescovo, E.;Fedorov, A. V.;Caruso, A. N.;Gibson, Q. D.;Muechler, L.;Felser, C.;Cava, R. J.;Topological semimetal in a Bi-Bi2Se3 infinitely adaptive superlattice;phase;PHYSICAL REVIEW B;86;24;241101;10.1103/PhysRevB.86.241101;DEC 5 2012;2012;We report spin-and angle-resolved photoemission studies of a topological;semimetal from the infinitely adaptive series between elemental Bi and;Bi2Se3. The compound, based on Bi4Se3, is a 1:1 natural superlattice of;alternating Bi-2 layers and Bi2Se3 layers; the inclusion of S allows the;growth of large crystals, with the formula Bi4Se2.6S0.4. The crystals;cleave along the interfaces between the Bi-2 and Bi2Se3 layers, with the;surfaces obtained having alternating Bi or Se termination. The resulting;terraces, observed by photoemission electron microscopy, create avenues;suitable for the study of one-dimensional topological physics. The;electronic structure, determined by spin-and angle-resolved;photoemission spectroscopy, shows the existence of a surface state that;forms a large, hexagonally shaped Fermi surface around the Gamma point;of the surface Brillouin zone, with the spin structure indicating that;this material is a topological semimetal.;Felser, Claudia/A-5779-2009; Schoop, Leslie/A-4627-2013; Muchler, Lukas/A-4628-2013; Ji, Huiwen/O-5145-2014;Schoop, Leslie/0000-0003-3459-4241;;15;2;0;0;15;1098-0121;WOS:000311912300001;;;J;Witczak-Krempa, William;Ghaemi, Pouyan;Senthil, T.;Kim, Yong Baek;Universal transport near a quantum critical Mott transition in two;dimensions;PHYSICAL REVIEW B;86;24;245102;10.1103/PhysRevB.86.245102;DEC 5 2012;2012;We discuss the universal-transport signatures near a zero-temperature;continuous Mott transition between a Fermi liquid and a quantum spin;liquid in two spatial dimensions. The correlation-driven transition;occurs at fixed filling and involves fractionalization of the electron:;upon entering the spin liquid, a Fermi surface of neutral spinons;coupled to an internal gauge field emerges. We present a controlled;calculation of the value of the zero-temperature universal resistivity;jump predicted to occur at the transition. More generally, the behavior;of the universal scaling function that collapses the temperature-and;pressure-dependent resistivity is derived, and is shown to bear a strong;imprint of the emergent gauge fluctuations. We further predict a;universal jump of the thermal conductivity across the Mott transition,;which derives from the breaking of conformal invariance by the damped;gauge field, and leads to a violation of the Wiedemann-Franz law in the;quantum critical region. A connection to the quasitriangular organic;salts is made, where such a transition might occur. Finally, we present;some transport results for the pure rotor O(N) conformal field theory.;10;0;0;0;10;1098-0121;WOS:000311912300003;;;J;Apostolov, Stanislav;Levchenko, Alex;Josephson current and density of states in proximity circuits with;s(+)-superconductors;PHYSICAL REVIEW B;86;22;224501;10.1103/PhysRevB.86.224501;DEC 4 2012;2012;We study the emergent proximity effect in mesoscopic circuits that;involve a conventional superconductor and an unconventional pnictide;superconductor separated by a diffusive normal or ferromagnetic wire.;The focus is placed on revealing signatures of the proposed s(+)-state;of pnictides from the proximity-induced density of states and Josephson;current. We find analytically a universal result for the density of;states that exhibits both the Thouless gap at low energies and peculiar;features near the superconducting gap edges at higher energies. The;latter may be used to discriminate between s(+)- and s(++) symmetry;scenarios in scanning tunneling spectroscopy experiments. We also;calculate Josephson current-phase relationships for different junction;configurations, which are found to display robust 0-pi transitions for a;wide range of parameters.;3;0;0;0;3;1098-0121;WOS:000311910600005;;;J;Balci, Sinan;Kocabas, Coskun;Ates, Simge;Karademir, Ertugrul;Salihoglu, Omer;Aydinli, Atilla;Tuning surface plasmon-exciton coupling via thickness dependent plasmon;damping;PHYSICAL REVIEW B;86;23;235402;10.1103/PhysRevB.86.235402;DEC 4 2012;2012;In this paper, we report experimental and theoretical investigations on;tuning of the surface plasmon-exciton coupling by controlling the;plasmonic mode damping, which is defined by the plasmonic layer;thickness. The results reveal the formation of plasmon-exciton hybrid;state characterized by a tunable Rabi splitting with energies ranging;from 0 to 150 meV. Polarization-dependent spectroscopic reflection;measurements were employed to probe the dispersion of the coupled;system. The transfer matrix method and analytical calculations were used;to model the self-assembled J-aggregate/metal multilayer structures in;excellent agreement with experimental observations.;Kocabas, Coskun/C-6018-2013;6;0;0;0;6;1098-0121;WOS:000311911100002;;;J;Belashchenko, K. D.;Glasbrenner, J. K.;Wysocki, A. L.;Spin injection from a half-metal at finite temperatures;PHYSICAL REVIEW B;86;22;224402;10.1103/PhysRevB.86.224402;DEC 4 2012;2012;Spin injection from a half-metallic electrode in the presence of thermal;spin disorder is analyzed using a combination of random matrix theory,;spin-diffusion theory, and explicit simulations for the tight-binding;s-d model. It is shown that efficient spin injection from a half-metal;is possible as long as the effective resistance of the normal metal does;not exceed a characteristic value, which does not depend on the;resistance of the half-metallic electrode but, rather, is controlled by;spin-flip scattering at the interface. This condition can be formulated;as alpha less than or similar to l/l(sf)(N) T-c(-1) where a is the;relative deviation of the magnetization from saturation, l and l(sf)(N);are the mean-free path and the spin-diffusion length in the nonmagnetic;channel, and T-c is the transparency of the tunnel barrier at the;interface (if present). The general conclusions are confirmed by;tight-binding s-d model calculations. A rough estimate suggests that;efficient spin injection from true half-metallic ferromagnets into;silicon or copper may be possible at room temperature across a;transparent interface.;Wysocki, Aleksander/D-6928-2013;1;0;0;0;1;1098-0121;WOS:000311910600003;;;J;Bessas, D.;Sergueev, I.;Wille, H. -C.;Persson, J.;Ebling, D.;Hermann, R. P.;Lattice dynamics in Bi2Te3 and Sb2Te3: Te and Sb density of phonon;states;PHYSICAL REVIEW B;86;22;224301;10.1103/PhysRevB.86.224301;DEC 4 2012;2012;The lattice dynamics in Bi2Te3 and Sb2Te3 were investigated both;microscopically and macroscopically using Sb-121 and Te-125 nuclear;inelastic scattering, x-ray diffraction, and heat capacity measurements.;In combination with earlier inelastic neutron scattering data, the;element-specific density of phonon states was obtained for both;compounds and phonon polarization analysis was carried out for Bi2Te3. A;prominent peak in the Te specific density of phonon states at 13 meV,;that involves mainly in-plane vibrations, is mostly unaffected upon;substitution of Sb with Bi revealing vibrations with essentially Te;character. A significant softening is observed for the density of;vibrational states of Bi with respect to Sb, consistently with the mass;homology relation in the long-wavelength limit. In order to explain the;energy mismatch in the optical phonon region, a similar to 20% force;constant softening of the Sb-Te bond with respect to the Bi-Te bond is;required. The reduced average speed of sound at 20 K in Bi2Te3, 1.75(1);km/s, compared to Sb2Te3, 1.85(4) km/s, is not only related to the;larger mass density but also to a larger Debye level. The observed low;lattice thermal conductivity at 295 K, 2.4 Wm(-1)K(-1) for Sb2Te3 and;1.6 Wm(-1)K(-1) for Bi2Te3, cannot be explained by anharmonicity alone;given the rather modest Gruneisen parameters, 1.7(1) for Sb2Te3 and;1.5(1) for Bi2Te3, without accounting for the reduced speed of sound and;more importantly the low acoustic cutoff energy.;Wille, Hans-Christian/C-3881-2013; Hermann, Raphael/F-6257-2013; Bessas, Dimitrios/I-5262-2013;Hermann, Raphael/0000-0002-6138-5624; Bessas,;Dimitrios/0000-0003-0240-2540;5;0;1;0;5;1098-0121;WOS:000311910600002;;;J;de Resseguier, T.;Lescoute, E.;Loison, D.;Influence of elevated temperature on the wave propagation and spallation;in laser shock-loaded iron;PHYSICAL REVIEW B;86;21;214102;10.1103/PhysRevB.86.214102;DEC 4 2012;2012;Laser shock experiments have been performed on preheated iron samples to;address the role of initial temperature on the elastic limit, wave;propagation, and spall fracture in this metal over the temperature range;300-1000 K at very high expansion rates of the order of 3 x 10(6) s(-1).;Time-resolved measurements of the free-surface velocity indicate a;slight, roughly linear decrease of the spall strength with increasing;temperature, accompanied by a clear change from brittle to ductile;fracture behavior evidenced from post-shot examination of the recovered;samples. The results are discussed on the basis of simulations;accounting for laser-matter interaction, pressure wave propagation, and;subsequent polymorphic transformations throughout the sample thickness.;Over the explored range of loading conditions, the occurrence of such;transformations prior to spallation, which takes place near the;free-surface under tensile loading after reversion to the alpha phase,;does not seem to strongly affect dynamic fracture.;loison, didier/N-2122-2014;3;0;0;0;3;1098-0121;WOS:000311910100001;;;J;Ellis, David S.;Uchiyama, Hiroshi;Tsutsui, Satoshi;Sugimoto, Kunihisa;Kato, Kenichi;Ishikawa, Daisuke;Baron, Alfred Q. R.;Phonon softening and dispersion in EuTiO3;PHYSICAL REVIEW B;86;22;220301;10.1103/PhysRevB.86.220301;DEC 4 2012;2012;We measured phonon dispersion in single-crystal EuTiO3 using inelastic;x-ray scattering. Astructural transition to an antiferrodistortive phase;was found at a critical temperature T-0 = 287 +/- 1K using powder and;single-crystal x-ray diffraction. Clear softening of the zone boundary;R-point q = (0.5 0.5 0.5) acoustic phonon shows this to be a displacive;transition. The mode energy plotted against reduced temperature could be;seen to nearly overlap that of SrTiO3, suggesting a universal scaling;relation. Phonon dispersion was measured along Gamma-X (0 0 0) -> (0.5 0;0). Mode eigenvectors were obtained from a shell model consistent with;the q dependence of intensity and energy, which also showed that the;dispersion is nominally the same as in SrTiO3 at room temperature, but;corrected for mass. The lowest-energy optical mode, determined to be of;Slater character, softens approximately linearly with temperature until;the 70-100 K range where the softening stops, and at low temperature,;the mode disperses linearly near the zone center.;7;0;0;0;7;1098-0121;WOS:000311910600001;;;J;Fock, J.;Leijnse, M.;Jennum, K.;Zyazin, A. S.;Paaske, J.;Hedegard, P.;Nielsen, M. Brondsted;van der Zant, H. S. J.;Manipulation of organic polyradicals in a single-molecule transistor;PHYSICAL REVIEW B;86;23;235403;10.1103/PhysRevB.86.235403;DEC 4 2012;2012;Inspired by cotunneling spectroscopy of spin-states in a single;OPE5-based molecule, we investigate the prospects for electric control;of magnetism in purely organic molecules contacted in a three-terminal;geometry. Using the gate electrode, the molecule is reversibly switched;between three different redox states, with magnetic spectra revealing;both ferromagnetic and antiferromagnetic exchange couplings on the;molecule. These observations are shown to be captured by an effective;low-energy Heisenberg model, which we substantiate microscopically by a;simple valence bond description of the molecule. These preliminary;findings suggest an interesting route towards functionalized all-organic;molecular magnetism.;Fock, Jeppe/A-9074-2011;Fock, Jeppe/0000-0002-7515-4026;3;0;0;0;3;1098-0121;WOS:000311911100003;;;J;Li, P. H. Y.;Bishop, R. F.;Campbell, C. E.;Farnell, D. J. J.;Goetze, O.;Richter, J.;Spin-1/2 Heisenberg antiferromagnet on an anisotropic kagome lattice;PHYSICAL REVIEW B;86;21;214403;10.1103/PhysRevB.86.214403;DEC 4 2012;2012;We use the coupled-cluster method to study the zero-temperature;properties of an extended two-dimensional Heisenberg antiferromagnet;formed from spin-1/2 moments on an infinite spatially anisotropic kagome;lattice of corner-sharing isosceles triangles, with nearest-neighbor;bonds only. The bonds have exchange constants J(1) > 0 along two of the;three lattice directions and J(2) = kappa J(1) > 0 along the third. In;the classical limit, the ground-state (GS) phase for kappa < 1/2 has;collinear ferrimagnetic (Neel') order where the J(2)-coupled chain spins;are ferromagnetically ordered in one direction with the remaining spins;aligned in the opposite direction, while for kappa > 1/2 there exists an;infinite GS family of canted ferrimagnetic spin states, which are;energetically degenerate. For the spin-1/2 case, we find that quantum;analogs of both these classical states continue to exist as stable GS;phases in some regions of the anisotropy parameter kappa, namely, for 0;< kappa < kappa(c1) for the Neel' state and for (at least part of) the;region kappa > kappa(c2) for the canted phase. However, they are now;separated by a paramagnetic phase without either sort of magnetic order;in the region kappa(c1) < kappa < kappa(c2), which includes the;isotropic kagome point kappa = 1 where the stable GS phase is now;believed to be a topological (Z(2)) spin liquid. Our best numerical;estimates are kappa(c1) = 0.515 +/- 0.015 and kappa(c2) = 1.82 +/- 0.03.;Richter, Johannes/A-6339-2009; Bishop, Raymond/D-9715-2012;Bishop, Raymond/0000-0001-5565-0658;4;0;0;0;4;1098-0121;WOS:000311910100002;;;J;Monozon, B. S.;Schmelcher, P.;Bound and resonant impurity states in a narrow gapped armchair graphene;nanoribbon;PHYSICAL REVIEW B;86;24;245404;10.1103/PhysRevB.86.245404;DEC 4 2012;2012;An analytical study of discrete and resonant impurity quasi-Coulomb;states in a narrow gapped armchair graphene nanoribbon (GNR) is;performed. We employ the adiabatic approximation assuming that the;motions parallel ("slow") and perpendicular ("fast") to the boundaries;of the ribbon are separated adiabatically. The energy spectrum comprises;a sequence of series of quasi-Rydberg levels relevant to the slow motion;adjacent from the low energies to the size-quantized levels associated;with the fast motion. Only the series attributed to the ground;size-quantized subband is really discrete, while others corresponding to;the excited subbands consist of quasidiscrete (Fano resonant) levels of;nonzero energetic widths, caused by the coupling with the states of the;continuous spectrum branching from the low lying subbands. In the;two-and three-subband approximation the spectrum of the complex energies;of the impurity electron is derived in an explicit form. Narrowing the;GNR leads to an increase of the binding energy and the resonant width;both induced by the finite width of the ribbon. Displacing the impurity;center from the midpoint of the GNR causes the binding energy to;decrease, while the resonant width of the first excited Rydberg series;increases. As for the second excited series, their widths become;narrower with the shift of the impurity. A successful comparison of our;analytical results with those obtained by other theoretical and;experimental methods is presented. Estimates of the binding energies and;the resonant widths taken for the parameters of typical GNRs show that;not only the strictly discrete but also some resonant states are quite;stable and could be studied experimentally in doped GNRs.;Monozon, Boris/E-6412-2012; Schmelcher, Peter/D-9592-2014;Schmelcher, Peter/0000-0002-2637-0937;0;0;0;0;0;1098-0121;WOS:000311911900002;;;J;Thiaville, Andre;Vukadinovic, Nicolas;Acher, Olivier;Sum rule for the magnetic permeability of arbitrary textures;PHYSICAL REVIEW B;86;21;214404;10.1103/PhysRevB.86.214404;DEC 4 2012;2012;The f-sum rule for the magnetic permeability, derived previously for an;assembly of isolated macrospins, is generalized for an arbitrary;nonuniform three-dimensional magnetization texture, in which the;magnetizations at different points are coupled by exchange and;magnetostatic interactions. The sum value depends only on the magnetic;texture at rest. It has no direct contribution from the exchange energy,;but depends on the anisotropy, applied field, and demagnetizing;energies. The derived formula is tested against numerical calculations;for several complex and very different magnetization structures. This;generalized sum rule should be useful for experiments, numerical;simulations, and metrology.;1;0;0;0;1;1098-0121;WOS:000311910100003;;;J;Troc, R.;Gajek, Z.;Pikul, A.;Dualism of the 5f electrons of the ferromagnetic superconductor UGe2 as;seen in magnetic, transport, and specific-heat data;PHYSICAL REVIEW B;86;22;224403;10.1103/PhysRevB.86.224403;DEC 4 2012;2012;Single-crystalline UGe2 was investigated by means of magnetic;susceptibility, magnetization, electrical resistivity,;magnetoresistivity, and specific-heat measurements, all carried out in;wide temperature and magnetic-field ranges. An analysis of the obtained;data points out the dual behavior of the 5f electrons in this compound,;i. e., possessing simultaneously local and itinerant characters in two;substates. The magnetic and thermal characteristics of the compound were;modeled using the effective crystal field (CF) in the intermediate;coupling scheme and initial parameters obtained in the angular overlap;model. Various configurations of the localized 5f(n) (n = 1, 2, and 3);electrons on the uranium ion have been probed. The best results were;obtained for the 5f(2) (U4+) configuration. The CF parameters obtained;in the paramagnetic region allowed us to reproduce satisfactorily the;experimental findings in the whole temperature range including also the;magnitude of the ordered magnetic moment of uranium at low temperature.;The electrical resistivity data after subtraction of the phonon;contribution reveal the presence of a Kondo-like interaction in UGe2;supporting the idea of partial localization of the 5f electrons in UGe2.;On the other hand, magnetoresistivity and an excess of specific heat;originated from the hybridized (itinerant) part of 5f states, apparent;around the characteristic temperature T*, give a distinct signature for;the presence of the coupled charge-density wave and spin-density wave;fluctuations over all the ferromagnetic region with a maximum at T*,;postulated earlier in the literature.;7;0;0;0;7;1098-0121;WOS:000311910600004;;;J;Williams, T. J.;Yamani, Z.;Butch, N. P.;Luke, G. M.;Maple, M. B.;Buyers, W. J. L.;Neutron scattering study of URu2-xRexSi2 (x=0.10): Driving order towards;quantum criticality;PHYSICAL REVIEW B;86;23;235104;10.1103/PhysRevB.86.235104;DEC 4 2012;2012;We report inelastic neutron scattering measurements in the hidden order;state of URu2-xRexSi2 with x = 0.10. We observe that towards the;ferromagnetic quantum critical point induced by the negative chemical;pressure of Re doping, the gapped incommensurate fluctuations are robust;and comparable in intensity to the parent material. As the Re doping;moves the system toward the quantum critical point, the commensurate;spin fluctuations related to hidden order weaken, display a shortened;lifetime, and slow down. Halfway to the quantum critical point, the;hidden order phase survives, albeit weakened, in contrast to its;destruction by hydrostatic pressure and by positive chemical pressure;from Rh doping.;yamani, zahra/B-7892-2012; Luke, Graeme/A-9094-2010;0;0;0;0;0;1098-0121;WOS:000311911100001;;;J;Wolfowicz, Gary;Simmons, Stephanie;Tyryshkin, Alexei M.;George, Richard E.;Riemann, Helge;Abrosimov, Nikolai V.;Becker, Peter;Pohl, Hans-Joachim;Lyon, Stephen A.;Thewalt, Mike L. W.;Morton, John J. L.;Decoherence mechanisms of Bi-209 donor electron spins in isotopically;pure Si-28;PHYSICAL REVIEW B;86;24;245301;10.1103/PhysRevB.86.245301;DEC 4 2012;2012;Bismuth (Bi-209) is the deepest group V donor in silicon and possesses;the most extreme characteristics such as a 9/2 nuclear spin and a 1.5;GHz hyperfine coupling. These lead to several potential advantages for a;Si:Bi donor electron spin qubit compared to the more common phosphorus;donor. Most previous studies on Si: Bi have been performed using natural;silicon where linewidths and electron spin coherence times are limited;by the presence of Si-29 impurities. Here, we describe electron spin;resonance (ESR) and electron nuclear double resonance (ENDOR) studies on;Bi-209 in isotopically pure Si-28. ESR and ENDOR linewidths, transition;probabilities, and coherence times are understood in terms of the spin;Hamiltonian parameters showing a dependence on field and m(I) of the;Bi-209 nuclear spin. We explore various decoherence mechanisms;applicable to the donor electron spin, measuring coherence times up to;700 ms at 1.7 K at X band, comparable with Si-28:P. Importantly, the;coherence times we measure follow closely to the calculated field;gradients of the transition frequencies (df/dB), providing a strong;motivation to explore "clock" transitions where coherence lifetimes;could be further enhanced.;Morton, John/I-3515-2013;6;1;0;0;6;1098-0121;WOS:000311911900001;;;J;Armbruster, Oskar;Lungenschmied, Christoph;Bauer, Siegfried;Investigation of trap states and mobility in organic semiconductor;devices by dielectric spectroscopy: Oxygen-doped P3HT:PCBM solar cells;PHYSICAL REVIEW B;86;23;235201;10.1103/PhysRevB.86.235201;DEC 3 2012;2012;We investigate the dielectric response of solar cell devices based on;oxygen-doped poly(3-hexylthiophene):[6,6]-phenyl-C-61-butyric acid;methyl ester (P3HT:PCBM) blends as a function of temperature between 133;K and 303 K. The spectra are analyzed using a recently introduced model;[O. Armbruster, C. Lungenschmied, and S. Bauer, Phys. Rev. B 84, 085208;(2011)] which is based on a trapping and reemission mechanism of charge;carriers. A dominating trap depth of 130 meV is determined and the;broadening of this trap level identified as purely thermal. In addition;we estimate the density of charge carriers after doping as well as their;mobility. We show that the concentration of mobile holes approximately;doubles by heating the device from the lowest to the highest measured;temperature. This is indicative of a second, shallow trap level of;approximately 14 meV. Dielectric spectroscopy hence proves to be a;valuable tool to assess device parameters such as dopant concentration,;charge carrier transport characteristics, and mobility which are of;crucial interest for understanding degradation in organic semiconductor;devices.;Bauer, Siegfried/A-2354-2009; Armbruster, Oskar/G-1154-2014;Armbruster, Oskar/0000-0002-4235-4451;3;0;0;0;3;1098-0121;WOS:000311806300004;;;J;Chen, Bo;Abbey, Brian;Dilanian, Ruben;Balaur, Eugeniu;van Riessen, Grant;Junker, Mark;Tran, Chanh Q.;Jones, Michael W. M.;Peele, Andrew G.;McNulty, Ian;Vine, David J.;Putkunz, Corey T.;Quiney, Harry M.;Nugent, Keith A.;Diffraction imaging: The limits of partial coherence;PHYSICAL REVIEW B;86;23;235401;10.1103/PhysRevB.86.235401;DEC 3 2012;2012;Coherent diffraction imaging (CDI) typically requires that the source;should be highly coherent both laterally and longitudinally. In this;paper, we demonstrate that lateral and longitudinal partial coherence;can be successfully included in a CDI reconstruction algorithm;simultaneously using experimental x-ray data. We study the interplay;between lateral partial coherence and longitudinal partial coherence and;their relative influence on CDI. We compare our results against the;coherence criteria published by Spence et al. [Spence et al.,;Ultramicroscopy 101, 149 (2004)] and show that for iterative ab initio;phase-recovery algorithms based on those typically used in CDI and in;cases where the coherence properties are known, we are able to relax the;minimal coherence requirements by a factor of 2 both laterally and;longitudinally, potentially yielding significant reduction in exposure;time.;Jones, Michael/M-6895-2013; Abbey, Brian/D-3274-2011;Jones, Michael/0000-0002-0720-8715;;5;1;0;0;5;1098-0121;WOS:000311806300008;;;J;Gawarecki, Krzysztof;Lueker, Sebastian;Reiter, Doris E.;Kuhn, Tilmann;Glaessl, Martin;Axt, Vollrath Martin;Grodecka-Grad, Anna;Machnikowski, Pawel;Dephasing in the adiabatic rapid passage in quantum dots: Role of;phonon-assisted biexciton generation;PHYSICAL REVIEW B;86;23;235301;10.1103/PhysRevB.86.235301;DEC 3 2012;2012;We study the evolution of an exciton confined in a quantum dot;adiabatically controlled by a frequency-swept (chirped) laser pulse in;the presence of carrier-phonon coupling. We focus on the dynamics;induced by a linearly polarized beam and analyze the decoherence due to;phonon-assisted biexciton generation. We show that if the biexciton;state is shifted down by a few meV, as is typically the case, then the;resulting decoherence is strong even at low temperatures. As a result,;efficient state preparation is restricted to a small parameter area;corresponding to low temperatures, positive chirps, and moderate pulse;areas.;Kuhn, Tilmann/C-1190-2008;6;0;0;0;6;1098-0121;WOS:000311806300006;;;J;Hellstrom, Matti;Spangberg, Daniel;Hermansson, Kersti;Broqvist, Peter;Cu dimer formation mechanism on the ZnO(10(1)over-bar0) surface;PHYSICAL REVIEW B;86;23;235302;10.1103/PhysRevB.86.235302;DEC 3 2012;2012;The formation of Cu dimers on the ZnO(10 (1) over bar0) surface has been;studied using hybrid density functional theory. Depending on the;adsorption site, Cu atoms are found to adsorb with either oxidation;state 0 or +1. In the latter case, the Cu atom has donated an electron;to the ZnO conduction band. The two modes of adsorption display similar;stability at low coverages, while at higher coverages the neutral;species is more stable. Single Cu atoms diffuse across the ZnO(10 (1);over bar0) surface with small barriers of migration (0.3-0.4 eV) along;ZnO[1 (2) over bar 10], repeatedly switching their oxidation states,;while the barrier along ZnO[0001] is significantly higher (>1.5 eV). The;formation of a Cu dimer from two adsorbed Cu atoms is energetically;favorable with two competing structures of similar stability, both being;charge neutral. The minimum energy paths for Cu atom diffusion and dimer;formation are characterized by at least one of the two Cu atoms being in;oxidation state 0.;5;0;0;0;5;1098-0121;WOS:000311806300007;;;J;Huang, Yu-Kun;Chen, Pochung;Kao, Ying-Jer;Accurate computation of low-temperature thermodynamics for quantum spin;chains;PHYSICAL REVIEW B;86;23;235102;10.1103/PhysRevB.86.235102;DEC 3 2012;2012;We apply the biorthonormal transfer-matrix renormalization group (BTMRG);[Huang, Phys. Rev. E 83, 036702 (2011)] to study low-temperature;properties of quantum spin chains. Simulations on anisotropic Heisenberg;spin-1/2 chains demonstrate that the BTMRG outperforms the conventional;transfer-matrix renormalization group by successfully accessing far;lower temperature than previously reported, while retaining the same;level of accuracy. The power of the method is further illustrated by the;calculation of the low-temperature specific heat for a frustrated spin;chain.;Kao, Ying Jer/B-5297-2009; Chen, Pochung/G-1241-2010;Kao, Ying Jer/0000-0002-3329-6018;;4;0;0;0;4;1098-0121;WOS:000311806300002;;;J;Kim, Jin Hee;Rhyee, Jong-Soo;Kwon, Yong Seung;Magnon gap formation and charge density wave effect on thermoelectric;properties in the SmNiC2 compound;PHYSICAL REVIEW B;86;23;235101;10.1103/PhysRevB.86.235101;DEC 3 2012;2012;We studied the electrical, thermal, and thermoelectric properties of the;polycrystalline compound of SmNiC2. The electrical resistivity and;magnetization measurement show the interplay between the charge density;wave at T-CDW = 150 K and the ferromagnetic ordering of T-c = 18 K.;Below the ferromagnetic transition temperature, we observed the magnon;gap formation of Delta similar or equal to 4.3- 4.4 meV by rho(T) and;C-p (T) measurements. The charge density wave is attributed to the;increase of the Seebeck coefficient resulting in the increase of the;power factor S-2 sigma. The thermal conductivity anomalously increases;with increasing temperature along the whole measured temperature range,;which implies the weak attribution of Umklapp phonon scattering. The;thermoelectric figure of merit ZT significantly increases due to the;increase of the power factor at T-CDW = 150 K. Here we argue that the;competing interaction between electron-phonon and electron-magnon;couplings exhibits the unconventional behavior of electrical and thermal;properties.;6;0;1;0;6;1098-0121;WOS:000311806300001;;;J;Osorio-Guillen, J. M.;Larrauri-Pizarro, Y. D.;Dalpian, G. M.;Pressure-induced metal-insulator transition and absence of magnetic;order in FeGa3 from a first-principles study;PHYSICAL REVIEW B;86;23;235202;10.1103/PhysRevB.86.235202;DEC 3 2012;2012;The intermetallic compound FeGa3 is a narrow-gap semiconductor with a;measured gap between 0.2 and 0.6 eV. The presence of iron d states on;the top of the valence band and on the bottom of the conduction band,;together with its moderate electronic correlation (U/W similar to 0.6),;have led to the question of whether there is magnetic order in this;compound. We have examined the possible presence of magnetism in FeGa3;as well as its electronic structure at high pressures, using the density;functional theory (DFT) + U method with the intermediated;double-counting scheme. We have found that for an optimized value of the;Yukawa screening length., there is no magnetic moment on the iron ions;(mu = 0), implying that FeGa3 is nonmagnetic. We have also found that;around a pressure of 25 GPa a metal-insulator transition takes place.;Osorio-Guillen, Jorge/B-7587-2008; Dalpian, Gustavo/B-9746-2008;Osorio-Guillen, Jorge/0000-0002-7384-8999;;3;0;0;0;3;1098-0121;WOS:000311806300005;;;J;Yuan, Xun;Zhang, Yubo;Abtew, Tesfaye A.;Zhang, Peihong;Zhang, Wenqing;VO2: Orbital competition, magnetism, and phase stability;PHYSICAL REVIEW B;86;23;235103;10.1103/PhysRevB.86.235103;DEC 3 2012;2012;The relative phase stability of VO2 is one of the most fundamental;issues concerning the metal-insulator transition in this material but;has been so far largely unexplored theoretically. We investigate the;relative stability of various phases of VO2 using different levels of;energy functionals within density functional theory (DFT). It is found;that straightforward applications of several popular energy functionals,;including the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, result in;a wrong prediction for the ground state of VO2. In particular, although;the HSE and DFT + U methods are able to produce a band gap in the M-1;phase, they strongly favor the formation of local magnetic moments, a;result that clearly disagrees with experiments. We also examine the;effect of the occupation and the redistribution of the d derived t(2g);(i.e., d(xz), d(yz), and d(x2-y2)) orbitals of V atoms on the calculated;relative phase stability of VO2. We find that a small change in d;occupation can result in a drastically different theoretical prediction.;With the introduction of an orbital-dependent potential, a complete;separation between the d(x2-y2) derived valence band and d(xz) and d(yz);derived conduction bands in the M-1 phase is achieved, resulting in a;slight redistribution of the d occupation and a more faithful account of;the polarization of the t(2g) orbitals. This slight rearrangement of the;d occupation also leads to a relative phase stability of VO2 ( including;structural and magnetic phases) that agrees well with experiment.;Zhang, Wenqing/K-1236-2012; Zhang, Peihong/D-2787-2012;4;0;0;0;4;1098-0121;WOS:000311806300003;;;J;Campi, Davide;Bernasconi, Marco;Benedek, Giorgio;Electronic properties and lattice dynamics of the As(111) surface;PHYSICAL REVIEW B;86;24;245403;10.1103/PhysRevB.86.245403;DEC 3 2012;2012;The bulk and surface electronic and structural properties of As(111);have been studied with first-principles methods. The inclusion of;spin-orbit interaction reveals that As shares the same topologically;nontrivial order of the bulk electronic bands of Sb which gives rise to;two spin-polarized surface states connecting valence-like and;conduction-like states. Bulk and surface phonons have been calculated by;means of density functional perturbation theory. The surface phonon;bands reveal features related to a remarkable stiffening of the surface;bilayer with respect to the bulk ones similarly to what is measured for;the Bi(111) and to what is expected for the Sb(111) surface.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000311806500003;;;J;Chakraborty, Akash;Wenk, Paul;Bouzerar, Richard;Bouzerar, Georges;Spontaneous magnetization in the presence of nanoscale inhomogeneities;in diluted magnetic systems;PHYSICAL REVIEW B;86;21;214402;10.1103/PhysRevB.86.214402;DEC 3 2012;2012;The presence of nanoscale inhomogeneities has been experimentally;evidenced in several diluted magnetic systems, which in turn often leads;to interesting physical phenomena. However, a proper theoretical;understanding of the underlying physics is lacking in most of the cases.;Here, we present a detailed and comprehensive theoretical study of the;effects of nanoscale inhomogeneities on the temperature-dependent;spontaneous magnetization in diluted magnetic systems, which is found to;exhibit an unusual and unconventional behavior. The effects of impurity;clustering on the magnetization response have hardly been studied until;now. We show that nanosized clusters of magnetic impurities can lead to;drastic effects on the magnetization compared to that of homogeneously;diluted compounds. The anomalous nature of the magnetization curves;strongly depends on the relative concentration of the inhomogeneities as;well as the effective range of the exchange interactions. In addition,;we also provide a systematic discussion of the nature of the;distributions of the local magnetizations.;3;0;0;0;3;1098-0121;WOS:000311805500004;;;J;Dmitriev, A. P.;Gornyi, I. V.;Polyakov, D. G.;Coulomb drag between ballistic quantum wires;PHYSICAL REVIEW B;86;24;245402;10.1103/PhysRevB.86.245402;DEC 3 2012;2012;We develop a kinetic equation description of Coulomb drag between;ballistic one-dimensional electron systems, which enables us to;demonstrate that equilibration processes between right- and left-moving;electrons are crucially important for establishing dc drag. In;one-dimensional geometry, this type of equilibration requires either;backscattering near the Fermi level or scattering with small-momentum;transfer near the bottom of the electron spectrum. Importantly, pairwise;forward scattering in the vicinity of the Fermi surface alone is not;sufficient to produce a nonzero dc drag resistivity rho(D), in contrast;to a number of works that have studied Coulomb drag due to this;mechanism of scattering before. We show that slow equilibration between;two subsystems of electrons of opposite chirality, "bottlenecked" by;inelastic collisions involving cold electrons near the bottom of the;conduction band, leads to a strong suppression of Coulomb drag, which;results in an activation dependence of rho(D) on temperature, instead of;the conventional power law. We demonstrate the emergence of a drag;regime in which rho(D) does not depend on the strength of interwire;interactions, while depending strongly on the strength of interactions;inside the wires.;4;0;0;0;4;1098-0121;WOS:000311806500002;;;J;Etz, Corina;Costa, Marcio;Eriksson, Olle;Bergman, Anders;Accelerating the switching of magnetic nanoclusters by anisotropy-driven;magnetization dynamics;PHYSICAL REVIEW B;86;22;224401;10.1103/PhysRevB.86.224401;DEC 3 2012;2012;In this work, the magnetization dynamics of clusters supported on;nonmagnetic substrates is shown to exhibit a complex response when;subjected to external magnetic fields. The field-driven magnetization;reversal of small Co clusters deposited on a Cu(111) surface has been;studied by means of first-principles calculations and atomistic spin;dynamics simulations. For applied fields ranging from 1 to 10 Tesla, we;observe a coherent magnetization reversal with switching times in the;range of several tenths of picoseconds to several nanoseconds, depending;on the field strength. We find a nonmonotonous dependence of the;switching times with respect to the strength of the applied field, which;we prove has its origin in the complex magnetic anisotropy landscape of;these low-dimensional systems. This effect is shown to be stable for;temperatures around 10 K, and is possible to realize over a range of;exchange interactions and anisotropy landscapes. Possible experimental;routes to achieve this unique switching behavior are discussed.;Bergman, Anders/H-7996-2012; Etz, Corina/E-3112-2014; Eriksson, Olle/E-3265-2014;Bergman, Anders/0000-0002-5134-1978;;3;1;0;0;3;1098-0121;WOS:000311805700003;;;J;Harada, S.;Zhou, J. J.;Yao, Y. G.;Inada, Y.;Zheng, Guo-qing;Abrupt enhancement of noncentrosymmetry and appearance of a spin-triplet;superconducting state in Li-2(Pd1-xPtx)(3)B beyond x=0.8;PHYSICAL REVIEW B;86;22;220502;10.1103/PhysRevB.86.220502;DEC 3 2012;2012;We report synthesis, Pt-195, B-11, and Li-7 NMR measurements, and;first-principles band calculations for noncentrosymmetric;superconductors Li-2(Pd1-xPtx)(3)B (x = 0, 0.2, 0.5, 0.8, 0.84, 0.9, and;1). For 0 <= x <= 0.8, the spin-lattice relaxation rate 1/T-1 shows a;clear coherence peak just below T-c, decreasing exponentially at low;temperature, and the Knight shift K-195 decreases below Tc. For x = 0.9;and 1.0, in contrast, 1/T-1 shows no coherence peak but a T-3 variation;and K-195 remains unchanged across T-c. These results indicate that the;superconducting state changes drastically from a spin-singlet dominant;to a spin-triplet dominant state at x = 0.8. We find that the distortion;of B(Pt,Pd)(6) increases abruptly above x = 0.8, which leads to an;abrupt enhancement of the asymmetric spin-orbit coupling as confirmed by;band calculation. Such structure distortion that enhances the extent of;inversion-symmetry breaking is primarily responsible for the pairing;symmetry evolution. The insight obtained here provides a guideline for;searching for noncentrosymmetric superconductors with a large;spin-triplet component.;Yao, Yugui/A-8411-2012; Zheng, Guo-qing/B-1524-2011;6;0;0;0;6;1098-0121;WOS:000311805700002;;;J;Huang, C. L.;Fritsch, V.;Kittler, W.;v. Loehneysen, H.;Low-temperature properties of CeAu2Ge2 single crystals grown from Au-Ge;and Sn flux;PHYSICAL REVIEW B;86;21;214401;10.1103/PhysRevB.86.214401;DEC 3 2012;2012;The specific heat of CeAu2Ge2 single crystals grown from Au-Ge (AGF) or;Sn flux (SF) was measured at temperatures T between 1.8 and 200 K. Two;magnetic transitions are observed in the zero-field specific heat at;12.1 and 14.5 K in the AGF sample, while only a single sharp transition;at 9.2 K is seen in the SF sample, confirming our recent susceptibility;results [Fritsch et al., Phys. Rev. B 84, 104446 (2011)]. We observe;several field-induced transitions in the magnetoresistance of the AGF;sample measured at 1.6 and 2.3 K in accordance with the B-T phase;diagram constructed from isothermal magnetization curves M(B). In;addition, we have measured M(B) under hydrostatic pressure P up to 10.5;kbar. The Neel temperature T-N increases linearly with P at a small rate;of 0.049 K/kbar, which suggests that, if T-N(P) is attributed to a pure;volume effect, this compound is close to the maximum transition;temperature of the Doniach diagram. The transition fields B-M between;the field-induced phases increase linearly with P as well. The;comparable Gruneisen parameters of T-N and B-M indicate that the energy;scale depending on the sample's volume is given by the antiferromagnetic;correlations and not by the Kondo effect. We discuss possible reasons;for the different magnetic behavior of AGF and SF samples.;Huang, Chien-Lung/O-2028-2013;2;0;0;0;2;1098-0121;WOS:000311805500003;;;J;Jadczak, J.;Kubisa, M.;Ryczko, K.;Bryja, L.;Potemski, M.;High magnetic field spin splitting of excitons in asymmetric GaAs;quantum wells;PHYSICAL REVIEW B;86;24;245401;10.1103/PhysRevB.86.245401;DEC 3 2012;2012;Low-temperature photoluminescence from high-quality GaAs quantum wells,;asymmetrically doped with carbon, are investigated under high magnetic;fields (up to 20 T) directed along the [001] growth axis. At higher;fields, in the sigma(-) polarized emission, we observe two well-resolved;lines which are attributed to the recombination of neutral (X) and;charged (X+) excitons. In contrast, only the neutral exciton line is;observed for the sigma(+) polarization. From the difference of the X;line positions for the two polarizations we determine the effective;Zeeman splitting of neutral excitons and then the g factor g(h) of;confined holes. We find that g(h) depends substantially on the well size;and changes the sign at moderate magnetic fields. To explain the;experimental results, the valence Landau levels are calculated using the;Luttinger model beyond the axial approximation. We demonstrate that;mainly the excited hole levels contribute to the excitonic state at;higher magnetic fields. Due to their light-hole character, resulting;from the valence-band mixing, the excited hole states have a sizable;overlap with the electron states confined far from the doped barrier.;The calculated values of g(h) are in an excellent quantitative agreement;with the experimental data.;2;0;0;0;2;1098-0121;WOS:000311806500001;;;J;Lane, Nina J.;Vogel, Sven C.;Hug, Gilles;Togo, Atsushi;Chaput, Laurent;Hultman, Lars;Barsoum, Michel W.;Neutron diffraction measurements and first-principles study of thermal;motion of atoms in select M(n+1)AX(n) and binary MX transition-metal;carbide phases;PHYSICAL REVIEW B;86;21;214301;10.1103/PhysRevB.86.214301;DEC 3 2012;2012;Herein, we compare the thermal vibrations of atoms in select ternary;carbides with the formula M(n+1)AX(n) ("MAX phases," M = Ti, Cr; A = Al,;Si, Ge; X = C, N) as determined from first-principles phonon;calculations to those obtained from high-temperature neutron powder;diffraction studies. The transition metal carbides TiC, TaC, and WC are;also studied to test our methodology on simpler carbides. Good;qualitative and quantitative agreement is found between predicted and;experimental values for the binary carbides. For all the MAX phases;studied-Ti3SiC2, Ti3GeC2, Ti2AlN, Cr2GeC and Ti4AlN3-density functional;theory calculations predict that the A element vibrates with the highest;amplitude and does so anisotropically with a higher amplitude within the;basal plane, which is in line with earlier results from high-temperature;neutron diffraction studies. In some cases, there are quantitative;differences in the absolute values between the theoretical and;experimental atomic displacement parameters (ADPs), such as reversal of;anisotropy or a systematic offset of temperature-dependent ADPs. The;mode-dependent Gruneisen parameters are also computed to explore the;anharmonicity in the system.;Lujan Center, LANL/G-4896-2012;4;0;0;0;4;1098-0121;WOS:000311805500002;;;J;Niemann, R.;Baro, J.;Heczko, O.;Schultz, L.;Faehler, S.;Vives, E.;Manosa, L.;Planes, A.;Tuning avalanche criticality: Acoustic emission during the martensitic;transformation of a compressed Ni-Mn-Ga single crystal;PHYSICAL REVIEW B;86;21;214101;10.1103/PhysRevB.86.214101;DEC 3 2012;2012;The propagation of a phase front during a thermally induced martensitic;transition is discontinuous due to pinning at various defects, an effect;which results in acoustic emission. Here we analyze the consequences of;an applied compressive stress exemplarily on a Ni50.4Mn27.9Ga21.7 single;crystal. Our experiments show that the distribution of the energies of;the acoustic emission events follows a power law for more than three;decades. This indicates that the transition exhibits avalanche;criticality. The exponent characterizing the distribution of energies;depends on the applied stress, and decreases from 1.9 +/- 0.1 at zero;stress to 1.5 +/- 0.2 at stress above 3 MPa. This decrease could be;attributed to the reduced multiplicity of variants possible under;uniaxial compression.;Niemann, Robert/F-3634-2012; Schultz, Ludwig/B-3383-2010; Manosa, Lluis/D-8579-2014; Heczko, Oleg/G-9355-2014; Vives, Eduard/I-4821-2014;Manosa, Lluis/0000-0002-1182-2670; Vives, Eduard/0000-0002-5916-7214;4;0;0;0;4;1098-0121;WOS:000311805500001;;;J;Usui, Hidetomo;Suzuki, Katsuhiro;Kuroki, Kazuhiko;Minimal electronic models for superconducting BiS2 layers;PHYSICAL REVIEW B;86;22;220501;10.1103/PhysRevB.86.220501;DEC 3 2012;2012;We construct minimal electronic models for a newly discovered;superconductor LaO1-xFxBiS2 (T-c = 10.6 K) possessing BiS2 layers based;on a first-principles band calculation. First, we obtain a model;consisting of two Bi 6p and two S 3p orbitals, which give nearly;electron-hole symmetric bands. Further focusing on the bands that;intersect the Fermi level, we obtain a model with two p orbitals. The;two bands (per BiS2 layer) have a quasi-one-dimensional character with a;double minimum dispersion, which gives good nesting of the Fermi;surface. At around x similar to 0.5 the topology of the Fermi surface;changes, so that the density of states at the Fermi level becomes large.;Possible pairing states are discussed.;42;0;0;0;42;1098-0121;WOS:000311805700001;;;J;Cammarata, Antonio;Rondinelli, James M.;Spin-assisted covalent bond mechanism in "charge-ordering" perovskite;oxides;PHYSICAL REVIEW B;86;19;195144;10.1103/PhysRevB.86.195144;NOV 30 2012;2012;First-principles density functional calculations on the metal-insulator;transition (MIT) in perovskite CaFeO3 point to local ferromagnetic;coupling as the microscopic origin for the electronic "charge order";transition. Our atomic, electronic, and magnetic structure analyses;reveal that the MIT results from a spin-assisted covalent bonding;mechanism between the O 2p and Fe 3d states with anisotropic Fe-O bonds;and negligible intersite Fe-Fe charge transfer. We suggest that control;of the lattice distortions, which mediate the covalent bond formation,;in oxides containing late transition-metal row cations in high valence;states provides a platform to tailor electronic transitions.;Rondinelli, James/A-2071-2009; Cammarata, Antonio/A-4883-2014;Rondinelli, James/0000-0003-0508-2175; Cammarata,;Antonio/0000-0002-5691-0682;7;0;0;0;7;1098-0121;WOS:000311715000003;;;J;Clem, John R.;Kogan, V. G.;Kinetic impedance and depairing in thin and narrow superconducting films;PHYSICAL REVIEW B;86;17;174521;10.1103/PhysRevB.86.174521;NOV 30 2012;2012;We use both Eilenberger-Usadel and Ginzburg-Landau (GL) theory to;calculate the superfluid's temperature-dependent kinetic inductance for;all currents up to the depairing current in thin and narrow;superconducting films. The calculations apply to BCS weak-coupling;superconductors with isotropic gaps and transport mean-free paths much;less than the BCS coherence length. The kinetic inductance is calculated;for the response to a small alternating current when the film is;carrying a dc bias current. In the slow-experiment/fast-relaxation;limit, in which the superconducting order parameter quasistatically;follows the time-dependent current, the kinetic inductance diverges as;the bias current approaches the depairing value. However, in the;fast-experiment/slow-relaxiation limit, in which the the superconducting;order parameter remains fixed at a value corresponding to the dc bias;current, the kinetic inductance rises to a finite value at the depairing;current. We then use time-dependent GL theory to calculate the kinetic;impedance of the superfluid, which includes not only the kinetic;reactance, but also the kinetic resistance of the superfluid arising;from dissipation due to order-parameter relaxation. The kinetic;resistance is largest for angular frequencies omega obeying omega tau(s);> 1, where tau(s) is the order-parameter relaxation time, and for bias;currents close to the depairing current. We also include the normal;fluid's contribution to dissipation in deriving an expression for the;total kinetic impedance. The Appendices contain many details about the;temperature-dependent behavior of superconductors carrying current up to;the depairing value.;3;0;0;0;3;1098-0121;WOS:000311714600005;;;J;Cohn, J. L.;Boynton, P.;Trivino, J. S.;Trastoy, J.;White, B. D.;dos Santos, C. A. M.;Neumeier, J. J.;Stoichiometry, structure, and transport in the quasi-one-dimensional;metal Li0.9Mo6O17;PHYSICAL REVIEW B;86;19;195143;10.1103/PhysRevB.86.195143;NOV 30 2012;2012;A correlation between lattice parameters, oxygen composition, and the;thermoelectric and Hall coefficients is presented for single-crystal;Li0.9Mo6O17, a quasi-one-dimensional (Q1D) metallic compound. The;possibility that this compound is a compensated metal is discussed in;light of a substantial variability observed in the literature for these;transport coefficients.;1;0;0;0;1;1098-0121;WOS:000311715000002;;;J;Crepaldi, A.;Ressel, B.;Cilento, F.;Zacchigna, M.;Grazioli, C.;Berger, H.;Bugnon, Ph.;Kern, K.;Grioni, M.;Parmigiani, F.;Ultrafast photodoping and effective Fermi-Dirac distribution of the;Dirac particles in Bi2Se3;PHYSICAL REVIEW B;86;20;205133;10.1103/PhysRevB.86.205133;NOV 30 2012;2012;We exploit time- and angle-resolved photoemission spectroscopy to;determine the evolution of the out-of-equilibrium electronic structure;of the topological insulator Bi2Se3. The response of the Fermi-Dirac;distribution to ultrashort IR laser pulses has been studied by modeling;the dynamics of hot electrons after optical excitation. We disentangle a;large increase in the effective temperature (T*) from a shift of the;chemical potential (mu*), which is consequence of the ultrafast;photodoping of the conduction band. The relaxation dynamics of T* and;mu* are k independent and these two quantities uniquely define the;evolution of the excited charge population. We observe that the energy;dependence of the nonequilibrium charge population is solely determined;by the analytical form of the effective Fermi-Dirac distribution.;14;1;0;0;14;1098-0121;WOS:000311715100007;;;J;Dumlich, Heiko;Reich, Stephanie;Nanotube bundles and tube-tube orientation: A van der Waals density;functional study (vol 84, 064121, 2011);PHYSICAL REVIEW B;86;17;179905;10.1103/PhysRevB.86.179905;NOV 30 2012;2012;0;0;0;0;0;1098-0121;WOS:000311714600007;;;J;Fukutani, Keisuke;Hayashi, Hirokazu;Yakovkin, Ivan N.;Habuchi, Takafumi;Hirayama, Daisuke;Jiang, Jian;Iwasawa, Hideaki;Shimada, Kenya;Losovyj, Ya. B.;Dowben, Peter A.;Enhanced electron-phonon coupling at the Au/Mo(112) surface;PHYSICAL REVIEW B;86;20;205432;10.1103/PhysRevB.86.205432;NOV 30 2012;2012;A detailed investigation of the electronic structure and electron-phonon;coupling for a Au monolayer on the Mo(112) surface is presented. The;electronic states of bulk Mo and the (112) surface-derived states are;seen to strongly hybridize with those of the Au overlayer, resulting in;the formation of surface resonance states localized near the surface and;the interface of Au/Mo(112). The experimentally extracted self-energy;due to the electron-phonon coupling on one of the surface resonance;bands gives a good quantitative agreement with the calculations. The;strength of electron-phonon coupling for Au/Mo(112) is discussed in;terms of the mass enhancement factor and is considerably larger than for;the Mo(112) surface. Such an increase in the mass enhancement factor in;the vicinity of the Fermi level likely derives from the soft surface;phonon modes created upon Au adsorption.;2;0;0;0;2;1098-0121;WOS:000311715100011;;;J;Hamada, Ikutaro;Adsorption of water on graphene: A van der Waals density functional;study;PHYSICAL REVIEW B;86;19;195436;10.1103/PhysRevB.86.195436;NOV 30 2012;2012;The van der Waals density functional (vdW-DF) was used to investigate;the interaction of a water monomer with graphene. It was found that a;variant of vdW-DF [Hamada and Otani, Phys. Rev. B 82, 153412 (2010)];predicts geometries and energetics of water on graphene which are in;good agreement with those obtained using more elaborate random-phase;approximation and quantum Monte Carlo approaches. Interfacial electronic;structures were also analyzed in detail.;Hamada, Ikutaro/E-8040-2010;Hamada, Ikutaro/0000-0001-5112-2452;12;1;0;0;12;1098-0121;WOS:000311715000010;;;J;Hofmann, D.;Kuemmel, S.;Integer particle preference during charge transfer in Kohn-Sham theory;PHYSICAL REVIEW B;86;20;201109;10.1103/PhysRevB.86.201109;NOV 30 2012;2012;We investigate the static and dynamic charge transfer that is triggered;by external electric fields in model molecular wires. A self-interaction;correction in Kohn-Sham density functional theory leads to the desired;integer electron transfers that do not occur with standard functionals;which miss Coulomb blockade effects. Analysis of the multiplicative;exchange-correlation potential in stationary cases and during real-time;propagation shows how the local exchange-correlation potential builds up;step and reverse-step structures that enforce the integer particle;preference. The role of spin-symmetry breaking is discussed.;Kummel, Stephan/K-5634-2014;8;0;0;0;8;1098-0121;WOS:000311715100002;;;J;Illg, Christian;Meyer, Bernd;Faehnle, Manfred;Frequencies and polarization vectors of phonons: Results from force;constants which are fitted to experimental data or calculated ab initio;PHYSICAL REVIEW B;86;17;174309;10.1103/PhysRevB.86.174309;NOV 30 2012;2012;The properties of phonons may be calculated from the dynamical matrix;which is determined by force constants. Often the force constants are;obtained by fitting them to experimental phonon frequencies, e. g., for;wave vectors q on high-symmetry directions of the Brillouin zone. It is;well known that these force constants do not necessarily lead to correct;frequencies for wave vectors for nonsymmetrical q and to correct;polarization vectors. In the present paper this is demonstrated by;comparing for fcc Ni, fcc Al, and bcc Fe the frequencies and;polarization vectors calculated from fitted force constants with the;results from ab initio calculated force constants. However, for most;regions of the Brillouin zone the differences between the results;obtained from the two sets of force constants are not large.;1;0;0;0;1;1098-0121;WOS:000311714600003;;;J;Iori, Federico;Rodolakis, Fanny;Gatti, Matteo;Reining, Lucia;Upton, M.;Shvyd'ko, Y.;Rueff, Jean-Pascal;Marsi, Marino;Low-energy excitations in strongly correlated materials: A theoretical;and experimental study of the dynamic structure factor in V2O3;PHYSICAL REVIEW B;86;20;205132;10.1103/PhysRevB.86.205132;NOV 30 2012;2012;This work contains an experimental and theoretical study of the dynamic;structure factor at large momentum transfer vertical bar Q vertical bar;similar to 4 angstrom(-1) of the strongly correlated transition-metal;oxide V2O3. We focus in particular on the transitions between d states;that give rise to the spectra below 6 eV. We show that the main peak in;this energy range is mainly due to t(2g) -> e(g)(sigma) transitions, and;that it carries a signature of the phase transition between the;paramagnetic insulator and the paramagnetic metal that can already be;understood from the joint density of states calculated at the level of;the static local density approximation. Instead, in order to obtain;theoretical spectra that are overall similar to the measured ones, we;have to go beyond the static approximation and include at least crystal;local field effects. The latter turn out to be crucial in order to;eliminate a spurious peak and hence allow a safe comparison between;theory and experiment, including an analysis of the strong anisotropy of;the spectra.;CSIC-UPV/EHU, CFM/F-4867-2012; Iori, Federico/E-5372-2013; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Iori, Federico/0000-0002-7677-3435;;4;0;0;0;4;1098-0121;WOS:000311715100006;;;J;Kharitonov, Maxim;Antiferromagnetic state in bilayer graphene;PHYSICAL REVIEW B;86;19;195435;10.1103/PhysRevB.86.195435;NOV 30 2012;2012;Motivated by the recent experiment of Velasco Jr. et al. [J. Velasco Jr.;et al., Nat. Nanotechnology 7, 156 (2012)], we develop a mean-field;theory of the interaction-induced antiferromagnetic (AF) state in;bilayer graphene at charge neutrality point at arbitrary perpendicular;magnetic field B. We demonstrate that the AF state can persist at all B.;At higher B, the state continuously crosses over to the AF phase of the;nu = 0 quantum Hall ferromagnet, recently argued to be realized in the;insulating nu = 0 state. The mean-field quasiparticle gap is finite at B;= 0 and grows with increasing B, becoming quasilinear in the quantum;Hall regime, in accord with the reported behavior of the transport gap.;By adjusting the two free parameters of the model, we obtain a;simultaneous quantitative agreement between the experimental and;theoretical values of the key parameters of the gap dependence-its;zero-field value and slope at higher fields. Our findings suggest that;the insulating state observed in bilayer graphene in Ref. 1 is;antiferromagnetic (canted, once the Zeeman effect is taken into account);at all magnetic fields.;19;1;0;0;19;1098-0121;WOS:000311715000009;;;J;Klos, J. W.;Kumar, D.;Romero-Vivas, J.;Fangohr, H.;Franchin, M.;Krawczyk, M.;Barman, A.;Effect of magnetization pinning on the spectrum of spin waves in;magnonic antidot waveguides;PHYSICAL REVIEW B;86;18;184433;10.1103/PhysRevB.86.184433;NOV 30 2012;2012;We study the spin-wave spectra in magnonic antidot waveguides (MAWs) for;two limiting cases (strong and negligible) of the surface anisotropy at;the ferromagnet/air interface. The MAWs under investigation have the;form of a thin stripe of permalloy with a single row of periodically;arranged antidots in the middle. The introduction of a magnetization;pinning at the edges of the permalloy stripe and the edges of antidots;is found to modify the spin-wave spectrum. This effect is shown to be;necessary for magnonic gaps to open in the considered systems. Our study;demonstrates that the surface anisotropy can be crucial in the practical;applications of MAWs and related structures and in the interpretation of;experimental results in one-and two-dimensional magnonic crystals. We;used three different numerical methods, i.e., plane waves method (PWM),;finite difference method, and finite element method to validate the;results. We showed that PWM in the present formulation assumes pinned;magnetization, while in micromagnetic simulations special care must be;taken to introduce pinning.;Fangohr, Hans/C-6367-2008; Klos, Jaroslaw/G-9728-2012;Fangohr, Hans/0000-0001-5494-7193; Klos, Jaroslaw/0000-0002-5858-2950;13;2;0;0;13;1098-0121;WOS:000311714700002;;;J;Kolata, K.;Koester, N. S.;Chernikov, A.;Drexler, M. J.;Gatti, E.;Cecci, S.;Chrastina, D.;Isella, G.;Guzzi, M.;Chatterjee, S.;Dephasing in Ge/SiGe quantum wells measured by means of coherent;oscillations;PHYSICAL REVIEW B;86;20;201303;10.1103/PhysRevB.86.201303;NOV 30 2012;2012;We present a dephasing time analysis of the excitonic resonances in;Ge/SiGe quantum wells for various lattice temperatures by coherent;oscillation spectroscopy (COS). The results are compared to the;linewidths of the excitonic resonances determined from linear absorption;measurements. Additionally, COS is applied to different samples with;varying linewidth, identifying one sample with a dominating;homogeneously broadened 1s excitonic resonance down to 7 K.;Chatterjee, Sangam/E-3124-2012;2;0;0;0;2;1098-0121;WOS:000311715100003;;;J;Lang, Li-Jun;Chen, Shu;Majorana fermions in density-modulated p-wave superconducting wires;PHYSICAL REVIEW B;86;20;205135;10.1103/PhysRevB.86.205135;NOV 30 2012;2012;We study the p-wave superconducting wire with a periodically modulated;chemical potential and show that the Majorana edge states are robust;against the periodic modulation. We find that the critical amplitude of;modulated potential, at which the Majorana edge fermions and topological;phase disappear, strongly depends on the phase shifts. For some specific;values of the phase shift, the critical amplitude tends to infinity. The;existence of Majorana edge fermions in the open chain can be;characterized by a topological Z(2) invariant of the bulk system, which;can be applied to determine the phase boundary between the topologically;trivial and nontrivial superconducting phases. We also demonstrate the;existence of the zero-energy peak in the spectral function of the;topological superconducting phase, which is only sensitive to the open;boundary condition but robust against the disorder.;Lang, Li-Jun/C-2815-2014;Lang, Li-Jun/0000-0001-6038-8340;11;0;0;0;11;1098-0121;WOS:000311715100009;;;J;Lazicki, Amy;Dewaele, Agnes;Loubeyre, Paul;Mezouar, Mohamed;High-pressure-temperature phase diagram and the equation of state of;beryllium;PHYSICAL REVIEW B;86;17;174118;10.1103/PhysRevB.86.174118;NOV 30 2012;2012;X-ray diffraction of beryllium in a laser-heated diamond anvil cell;provides experimental insight into its behavior at high pressure and;temperature. We measure the cold compression of Be in helium and NaCl;pressure media up 192 GPa, and its thermal expansion up to 82 GPa and;2630 K. The new measurements form a P-V-T data set which is fit by the;Vinet-Debye form to establish a Be experimental equation of state. We;compare the results to several theoretical models. The crystal structure;of Be is determined up to 205 GPa and 4000 K; no evidence for the;predicted high-temperature transition to a cubic phase is found.;Finally, the maximum temperature stability of the solid phase along;isobaric heating ramps gives a lower bound for the melting curve.;5;0;0;0;5;1098-0121;WOS:000311714600002;;;J;Li, J.;Ekuma, C. E.;Vekhter, I.;Jarrell, M.;Moreno, J.;Stadler, S.;Karki, A. B.;Jin, R.;Physical properties of Ba2Mn2Sb2O single crystals;PHYSICAL REVIEW B;86;19;195142;10.1103/PhysRevB.86.195142;NOV 30 2012;2012;We report both experimental and theoretical investigations of the;physical properties of Ba2Mn2Sb2O single crystals. This material;exhibits a hexagonal structure with lattice constants a = 4.7029(15) A;and c = 19.9401(27) A, as obtained from powder x-ray diffraction;measurements, and in agreement with structural optimization through;density functional theory (DFT) calculations. The magnetic;susceptibility and specific heat show anomalies at T-N = 60 K,;consistent with antiferromagnetic ordering. However, the magnitude of;T-N is significantly smaller than the Curie-Weiss temperature (vertical;bar Theta(CW)vertical bar approximate to 560 K), suggesting a magnetic;system of reduced dimensionality. The temperature dependence of both the;in-plane and out-of-plane resistivity changes from activated at T > T-x;similar to 200 K to logarithmic at T < T-x. Correspondingly, the;magnetic susceptibility displays a bump at T-x. DFT calculations at the;DFT + U level support the experimental observation of an;antiferromagnetic ground state.;Vekhter, Ilya/M-1780-2013; Moreno, Juana/D-5882-2012;0;0;0;0;0;1098-0121;WOS:000311715000001;;;J;Mafra, D. L.;Kong, J.;Sato, K.;Saito, R.;Dresselhaus, M. S.;Araujo, P. T.;Using gate-modulated Raman scattering and electron-phonon interactions;to probe single-layer graphene: A different approach to assign phonon;combination modes;PHYSICAL REVIEW B;86;19;195434;10.1103/PhysRevB.86.195434;NOV 30 2012;2012;Gate-modulated and laser-dependent Raman spectroscopy have been widely;used to study q = 0 zone center phonon modes, their self-energy, and;their coupling to electrons in graphene systems. In this work we use;gate-modulated Raman of q not equal 0 phonons as a technique to;understand the nature of five second-order Raman combination modes;observed in the frequency range of 1700-2300 cm(-1) of single-layer;graphene (SLG). Anomalous phonon self-energy renormalization phenomena;are observed in all five combination modes within this intermediate;frequency region, which can clearly be distinguished from one another.;By combining the anomalous phonon renormalization effect with the double;resonance Raman theory, which includes both phonon dispersion relations;and angular dependence of the electron-phonon scattering matrix;elements, and by comparing it to the experimentally obtained phonon;dispersion, measured by using different laser excitation energies, we;can assign each Raman peak to the proper phonon combination mode. This;approach should also shed light on the understanding of more complex;structures such as few-layer graphene (FLG) and its stacking orders as;well as other two-dimensional (2D)-like materials.;Sato, Kentaro/B-7163-2008; Saito, Riichiro/B-1132-2008;Sato, Kentaro/0000-0001-6706-2175;;5;2;1;0;5;1098-0121;WOS:000311715000008;;;J;Mazza, Giacomo;Fabrizio, Michele;Dynamical quantum phase transitions and broken-symmetry edges in the;many-body eigenvalue spectrum;PHYSICAL REVIEW B;86;18;184303;10.1103/PhysRevB.86.184303;NOV 30 2012;2012;Many-body models undergoing a quantum phase transition to a;broken-symmetry phase that survives up to a critical temperature must;possess, in the ordered phase, symmetric as well as nonsymmetric;eigenstates. We predict, and explicitly show in the fully connected;Ising model in a transverse field, that these two classes of eigenstates;do not overlap in energy, and therefore that an energy edge exists;separating low-energy symmetry-breaking eigenstates from high-energy;symmetry-invariant ones. This energy is actually responsible, as we;show, for the dynamical phase transition displayed by this model under a;sudden large increase of the transverse field. A second situation we;consider is the opposite, where the symmetry-breaking eigenstates are;those in the high-energy sector of the spectrum, whereas the low-energy;eigenstates are symmetric. In that case too a special energy must exist;marking the boundary and leading to unexpected out-of-equilibrium;dynamical behavior. An example is the fermonic repulsive Hubbard model;Hamiltonian H. Exploiting the trivial fact that the high-energy spectrum;of H is also the low-energy one of -H, we conclude that the high-energy;eigenstates of the Hubbard model are superfluid. Simulating in a;time-dependent Gutzwiller approximation the time evolution of a;high-energy BCS-like trial wave function, we show that a small;superconducting order parameter will actually grow in spite of the;repulsive nature of the interaction.;fabrizio, michele/N-3762-2014;2;0;0;0;2;1098-0121;WOS:000311714700001;;;J;Mueller, T.;Aharonovich, I.;Wang, Z.;Yuan, X.;Castelletto, S.;Prawer, S.;Atatuere, M.;Phonon-induced dephasing of chromium color centers in diamond;PHYSICAL REVIEW B;86;19;195210;10.1103/PhysRevB.86.195210;NOV 30 2012;2012;We report on the coherence properties of single photons from;chromium-based color centers in diamond. We use field-correlation and;spectral line-shape measurements to reveal the interplay between slow;spectral wandering and fast dephasing mechanisms as a function of;temperature. The zero-phonon transition frequency and its linewidth;follow a power-law dependence on temperature, which is consistent with;direct electron-phonon coupling and phonon-modulated Coulomb coupling to;nearby impurities, which are the predominant fast dephasing mechanisms;for these centers. Further, the observed reduction in the quantum yield;for photon emission as a function of temperature suggests the opening of;additional nonradiative channels through thermal activation to;higher-energy states and indicates a near-unity quantum efficiency at 4;K.;castelletto, stefania/G-1516-2011; McKenzie, Warren/J-2137-2014;3;0;0;0;3;1098-0121;WOS:000311715000007;;;J;Murthy, Ganpathy;Shankar, R.;Hamiltonian theory of fractionally filled Chern bands;PHYSICAL REVIEW B;86;19;195146;10.1103/PhysRevB.86.195146;NOV 30 2012;2012;There is convincing numerical evidence that fractional quantum-Hall-like;ground states arise in fractionally filled Chern bands. Here, we show;that the Hamiltonian theory of composite fermions (CF) can be as useful;in describing these states as it was in describing the fractional;quantum Hall effect (FQHE) in the continuum. We are able to introduce;CFs into the fractionally filled Chern-band problem in two stages.;First, we construct an algebraically exact mapping which expresses the;electron density projected to the Chern band rho(FCB) as a sum of;Girvin-MacDonald-Platzman density operators rho(GMP) that obey the;magnetic translation algebra. Next, following our Hamiltonian treatment;of the FQH problem, we rewrite the operators rho(GMP) in terms of CF;variables which reproduce the same algebra. This naturally produces a;unique Hartree-Fock ground state for the CFs, which can be used as a;springboard for computing gaps, response functions,;temperature-dependent phenomena, and the influence of disorder. We give;two concrete examples, one of which has no analog in the continuum FQHE;with nu = 1/5 and sigma(xy) = 2/5. Our approach can be easily extended;to fractionally filled, strongly interacting two-dimensional;time-reversal-invariant topological insulators.;15;0;0;0;15;1098-0121;WOS:000311715000005;;;J;Ovsyannikov, Sergey V.;Morozova, Natalia V.;Karkin, Alexander E.;Shchennikov, Vladimir V.;High-pressure cycling of hematite alpha-Fe2O3: Nanostructuring, in situ;electronic transport, and possible charge disproportionation;PHYSICAL REVIEW B;86;20;205131;10.1103/PhysRevB.86.205131;NOV 30 2012;2012;We studied electronic transport properties of hematite (alpha-Fe2O3) at;room temperature under cycling of high pressure up to similar to 22 GPa.;The original samples and those recovered after high-pressure experiments;were examined by x-ray diffraction and Raman and optical absorption;spectroscopy. At ambient pressure the original samples were also;characterized by temperature measurements of electrical and;galvanomagnetic properties. Upon compression, the original single;crystals underwent a sluggish structural deconfinement starting above 5;GPa into a nanometric state. Above 5-7 GPa, the nanostructured hematite;showed a reversible transition to a state with enhanced electrical;conductivity and moderate values of thermoelectric power (Seebeck;effect) of about -150 mu V/K. This electronic phase corresponds to;neither conventional trivalent oxidation state of the iron ions in;hematite nor metallic conductivity. Analysis of the electronic transport;data in the frameworks of two models, of polaron hopping, and of;intrinsic semiconductor conductivity, revealed a change from the;electron conductivity to two-band electrical conductivity and suggested;that the observed enhancement of the electrical properties in;nanocrystalline alpha-Fe2O3 above 5-7 GPa is related to the;mixed-valence state of the iron ions. Since alpha-Fe2O3 is believed to;undergo a "spin-flop" (Morin) transition near 2-5 GPa at room;temperature, we discuss potential contributions of magnetoelastic and;other effects to the observed high-pressure properties of hematite.;Ovsyannikov, Sergey/J-7802-2012; Morozova, Natalia/J-3568-2013; Karkin, Alexander/J-6712-2013; Shchennikov, Vladimir/J-8533-2013;Morozova, Natalia/0000-0002-2377-1372; Karkin,;Alexander/0000-0003-0464-4762; Shchennikov, Vladimir/0000-0003-2887-1652;4;0;0;0;4;1098-0121;WOS:000311715100005;;;J;Pielawa, Susanne;Berg, Erez;Sachdev, Subir;Frustrated quantum Ising spins simulated by spinless bosons in a tilted;lattice: From a quantum liquid to antiferromagnetic order;PHYSICAL REVIEW B;86;18;184435;10.1103/PhysRevB.86.184435;NOV 30 2012;2012;We study spinless bosons in a decorated square lattice with a;near-diagonal tilt. The resonant subspace of the tilted Mott insulator;is described by an effective Hamiltonian of frustrated quantum Ising;spins on a nonbipartite lattice. This generalizes an earlier proposal;for the unfrustrated quantum Ising model in one dimension which was;realized in a recent experiment on ultracold Rb-87 atoms in an optical;lattice. Very close to diagonal tilt, we find a quantum liquid state;which is continuously connected to the paramagnet. Frustration can be;reduced by increasing the tilt angle away from the diagonal, and the;system undergoes a transition to an antiferromagnetically ordered state.;Using quantum Monte Carlo simulations and exact diagonalization, we find;that for realistic system sizes the antiferromagnetic order appears to;be quasi-one-dimensional, however, in the thermodynamic limit the order;is two-dimensional.;Sachdev, Subir/A-8781-2013;Sachdev, Subir/0000-0002-2432-7070;1;0;0;0;1;1098-0121;WOS:000311714700004;;;J;Popov, V. V.;Polischuk, O. V.;Davoyan, A. R.;Ryzhii, V.;Otsuji, T.;Shur, M. S.;Plasmonic terahertz lasing in an array of graphene nanocavities;PHYSICAL REVIEW B;86;19;195437;10.1103/PhysRevB.86.195437;NOV 30 2012;2012;We propose a novel concept of terahertz lasing based on stimulated;generation of plasmons in a planar array of graphene resonant;micro/nanocavities strongly coupled to terahertz radiation. Due to the;strong plasmon confinement and superradiant nature of terahertz emission;by the array of plasmonic nanocavities, the amplification of terahertz;waves is enhanced by many orders of magnitude at the plasmon resonance;frequencies. We show that the lasing regime is ensured by the balance;between the plasmon gain and plasmon radiative damping.;Davoyan, Artur/K-8567-2013;Davoyan, Artur/0000-0002-4662-1158;15;0;0;0;15;1098-0121;WOS:000311715000011;;;J;Romanov, Sergei G.;Vogel, Nicolas;Bley, Karina;Landfester, Katharina;Weiss, Clemens K.;Orlov, Sergej;Korovin, Alexander V.;Chuiko, Gennady P.;Regensburger, Alois;Romanova, Alexandra S.;Kriesch, Arian;Peschel, Ulf;Probing guided modes in a monolayer colloidal crystal on a flat metal;film;PHYSICAL REVIEW B;86;19;195145;10.1103/PhysRevB.86.195145;NOV 30 2012;2012;Two-dimensional slab hybrid metal-dielectric photonic crystals, which;are prepared by assembling polymer colloidal spheres into closely packed;monolayers of hexagonal symmetry on a gold-coated glass substrate, show;an improved confinement of light compared with a colloidal monolayer on;a glass substrate. We demonstrated that the optical response of such;hybrid crystals consists of diffractively coupled waveguiding modes,;Fabry-Perot resonances, and Mie resonances. Correspondingly, two major;mechanisms, namely, band transport and hopping of localized excitations,;participate in the in-plane light transport in such hybrid crystals.;Weiss, Clemens/C-9932-2009; Peschel, Ulf/C-3356-2013; Romanov, Sergei/H-6868-2013; Kriesch, Arian/A-7337-2011;Weiss, Clemens/0000-0001-8559-0385; Romanov, Sergei/0000-0003-0546-9505;;Kriesch, Arian/0000-0002-8347-0344;6;1;0;0;6;1098-0121;WOS:000311715000004;;;J;Schoop, Leslie;Muechler, Lukas;Schmitt, Jennifer;Ksenofontov, Vadim;Medvedev, Sergey;Nuss, Juergen;Casper, Frederick;Jansen, Martin;Cava, R. J.;Felser, Claudia;Effect of pressure on superconductivity in NaAlSi;PHYSICAL REVIEW B;86;17;174522;10.1103/PhysRevB.86.174522;NOV 30 2012;2012;The ternary superconductor NaAlSi, isostructural with LiFeAs, the "111";iron pnictide superconductor, is investigated under pressure. The;structure remains stable up to 15 GPa. Resistivity and susceptibility;measurements show an increase of T-c up to 2 GPa, followed by a decrease;until superconductivity disappears at 4.8 GPa. Band structure;calculations show that pressure should have a negligible effect on the;electronic structure and the Fermi surface and thus the disappearance of;superconductivity under pressure must have a different origin. We;compare the electronic structure of NaAlSi under pressure with that of;nonsuperconducting isostructural NaAlGe.;Felser, Claudia/A-5779-2009; Casper, Frederick/A-5782-2009; Nuss, Juergen/G-2711-2010; Muchler, Lukas/A-4628-2013; Schoop, Leslie/A-4627-2013;Nuss, Juergen/0000-0002-0679-0184; Schoop, Leslie/0000-0003-3459-4241;1;0;0;0;1;1098-0121;WOS:000311714600006;;;J;Schwier, E. F.;Scherwitzl, R.;Vydrova, Z.;Garcia-Fernandez, M.;Gibert, M.;Zubko, P.;Garnier, M. G.;Triscone, J. -M.;Aebi, P.;Unusual temperature dependence of the spectral weight near the Fermi;level of NdNiO3 thin films;PHYSICAL REVIEW B;86;19;195147;10.1103/PhysRevB.86.195147;NOV 30 2012;2012;We investigate the behavior of the spectral weight near the Fermi level;of NdNiO3 thin films as a function of temperature across the;metal-to-insulator transition (MIT) by means of ultraviolet;photoelectron spectroscopy. The spectral weight was found to exhibit;thermal hysteresis, similar to that of the dc conductivity. A detailed;analysis of the temperature dependence reveals two distinct regimes of;spectral loss close to the Fermi level. The temperature evolution of one;regime is found to be independent of the MIT.;Garcia-Fernandez, Mirian/B-6018-2013; Zubko, Pavlo/B-5496-2009;Zubko, Pavlo/0000-0002-7330-3163;2;0;0;0;2;1098-0121;WOS:000311715000006;;;J;Sen, Arnab;Damle, Kedar;Moessner, R.;Vacancy-induced spin textures and their interactions in a classical spin;liquid;PHYSICAL REVIEW B;86;20;205134;10.1103/PhysRevB.86.205134;NOV 30 2012;2012;Motivated by experiments on the archetypal frustrated magnet;SrCr9pGa12-9pO19 (SCGO), we study the classical Heisenberg model on the;pyrochlore slab (kagome bilayer) lattice with site dilution x = 1 - p.;This allows us to address generic aspects of the physics of nonmagnetic;vacancies in a classical spin liquid. We explicitly demonstrate that the;pure (x = 0) system remains a spin liquid down to the lowest;temperatures, with an unusual nonmonotonic temperature dependence of the;susceptibility, which even turns diamagnetic for the apical spins;between the two kagome layers. For x > 0 but small, the low-temperature;magnetic response of the system is most naturally described in terms of;the properties of spatially extended spin textures that cloak an;"orphan" S = 3/2 Cr3+ spin in direct proximity to a pair of missing;sites belonging to the same triangular simplex. In the T -> 0 limit,;these orphan-texture complexes each carry a net magnetization that is;exactly half the magnetic moment of an individual spin of the undiluted;system. Furthermore, we demonstrate that they interact via an entropic;temperature-dependent pairwise exchange interaction J(eff) (T,(r) over;right arrow) similar to T J ((r) over right arrow root T) that has a;logarithmic form at short distances and decays exponentially beyond a;thermal correlation length xi(T) similar to 1/root T. The sign of J(eff);depends on whether the two orphan spins belong to the same kagome layer;or not. We provide a detailed analytical account of these properties;using an effective field theory approach specifically tailored for the;problem at hand. These results are in quantitative agreement with;large-scale Monte Carlo numerics.;3;1;0;0;3;1098-0121;WOS:000311715100008;;;J;Solanki, Ravindra Singh;Mishra, S. K.;Senyshyn, Anatoliy;Ishii, I.;Moriyoshi, Chikako;Suzuki, Takashi;Kuroiwa, Yoshihiro;Pandey, Dhananjai;Antiferrodistortive phase transition in pseudorhombohedral;(Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and;neutron powder diffraction study;PHYSICAL REVIEW B;86;17;174117;10.1103/PhysRevB.86.174117;NOV 30 2012;2012;The controversies about the structure of the true ground state of;pseudorhombohedral compositions of Pb(ZrxTi1-x)O-3 (PZT) are addressed;using a 6% Sr2+ substituted sample with x = 0.550. Sound velocity;measurements reveal a phase transition at T-c similar to 279 K. The;temperature dependence of full width at half maximum of (h00)(pc) peaks;and the unit cell volume also show anomalies around 279 K even though;there is no indication of any change of space group in the synchrotron;x-ray powder diffraction (SXRD) patterns. The neutron powder diffraction;patterns reveal appearance of superlattice peaks below T-c similar to;279 K, confirming the existence of an antiferrodistortive phase;transition. The Rietveld analysis of the room-temperature and;low-temperature SXRD data below T-c shows that the structure corresponds;to single monoclinic phase in the Cm space group while the analysis of;neutron powder diffraction data reveals that the structure of the;ground-state phase below T-c corresponds to the Cc space group. Our;analysis shows that the structural models for the ground-state phase;based on the R3c space group with or without the coexistence of the;room-temperature monoclinic phase in the Cm space group can be rejected.;SOLANKI, RAVINDRA /H-7221-2013; Senyshyn, Anatoliy/C-8267-2014;Senyshyn, Anatoliy/0000-0002-1473-8992;3;0;0;0;3;1098-0121;WOS:000311714600001;;;J;Steinke, N. -J.;Moore, T. A.;Mansell, R.;Bland, J. A. C.;Barnes, C. H. W.;Nonuniversal dynamic magnetization reversal in the Barkhausen-dominated;and mesofrequency regimes;PHYSICAL REVIEW B;86;18;184434;10.1103/PhysRevB.86.184434;NOV 30 2012;2012;Dynamic magnetization reversal in the mesofrequency range is studied by;ac magneto-optical Kerr effect (ac-MOKE) and ac anisotropic;magnetoresistance (ac-AMR) magnetometry in a series of epitaxial and;polycrystalline thin magnetic films. The dynamic coercive field was;found to scale as a power law with scaling exponents <= 1/2 depending on;the ferromagnetic material. In addition, there is a low sweep rate;regime in which the dynamic coercivity reaches a minimum. These findings;are explained in the context of reversal proceeding by motion of a few;domain walls (similar to 1). At dc and low field sweep rates the;reversal proceeds between local pinning sites via Barkhausen avalanches;and the overall reversal speed is strongly dependent on the field sweep;rate. At higher field sweep rates a continuous motion regime is entered;in which the reversal velocity depends linearly on the applied field;sweep rate and only an average pinning force is experienced by the wall.;The fit of the dynamic coercivity vs applied field sweep rate allows the;determination of the average nonlocal pinning field. The nonuniversal;scaling exponent can be explained using recently developed models and;introducing a field rate-dependent number of active domain walls.;Mansell, Rhodri/A-1450-2013;2;0;0;0;2;1098-0121;WOS:000311714700003;;;J;Stoffel, M.;Fagot-Revurat, Y.;Tejeda, A.;Kierren, B.;Nicolaou, A.;Le Fevre, P.;Bertran, F.;Taleb-Ibrahimi, A.;Malterre, D.;Electron-phonon coupling on strained Ge/Si(111)-(5x5) surfaces;PHYSICAL REVIEW B;86;19;195438;10.1103/PhysRevB.86.195438;NOV 30 2012;2012;We investigate the structural and electronic properties of strained;Ge/Si(111)-(5 x 5) surfaces by means of scanning tunneling microscopy;and high-resolution angle-resolved photoemission spectroscopy. The;homogeneous (5 x 5) reconstructed overlayers are characterized by three;electronic surface states, similar to the Si(111)-(7 x 7) surface. The;dispersion of the dangling bond related surface state exhibits the same;periodicity as that of the (5 x 5) reconstruction. Moreover, a careful;analysis of the shape and width of this surface state provides striking;evidence of electron-phonon coupling at low temperatures. By considering;the spectral function within a simple Debye model, we determine both the;Debye energy and the electron-phonon coupling strength. The latter value;is further confirmed by analyzing the temperature-dependent phonon;broadening of the dangling bond related surface state linewidth.;BERTRAN, Francois/B-7515-2008; Tejeda, Antonio/C-4711-2014;BERTRAN, Francois/0000-0002-2416-0514; Tejeda,;Antonio/0000-0003-0125-4603;1;0;0;0;1;1098-0121;WOS:000311715000012;;;J;Turek, I.;Kudrnovsky, J.;Carva, K.;Magnetic anisotropy energy of disordered tetragonal Fe-Co systems from;ab initio alloy theory;PHYSICAL REVIEW B;86;17;174430;10.1103/PhysRevB.86.174430;NOV 30 2012;2012;We present results of systematic fully relativistic first-principles;calculations of the uniaxial magnetic anisotropy energy (MAE) of a;disordered and partially ordered tetragonal Fe-Co alloy using the;coherent potential approximation (CPA). This alloy has recently become a;promising system for thin ferromagnetic films with a perpendicular;magnetic anisotropy. We find that existing theoretical approaches to;homogeneous random bulk Fe-Co alloys, based on a simple virtual crystal;approximation (VCA), overestimate the maximum MAE values obtained in the;CPA by a factor of 4. This pronounced difference is ascribed to the;strong disorder in the minority spin channel of real alloys, which is;neglected in the VCA and which leads to a broadening of the d-like;eigenstates at the Fermi energy and to the reduction of the MAE. The;ordered Fe-Co alloys with a maximum L1(0)-like atomic long-range order;can exhibit high values of the MAE, which, however, get dramatically;reduced by small perturbations of the perfect order.;Carva, Karel/A-3703-2008; Turek, Ilja/G-5553-2014; KUDRNOVSKY, Josef/G-5581-2014;KUDRNOVSKY, Josef/0000-0002-9968-6748;10;0;0;0;10;1098-0121;WOS:000311714600004;;;J;Uppstu, Andreas;Harju, Ari;High-field magnetoresistance revealing scattering mechanisms in graphene;PHYSICAL REVIEW B;86;20;201409;10.1103/PhysRevB.86.201409;NOV 30 2012;2012;We show that the type of charge carrier scattering significantly affects;the high-field magnetoresistance of graphene nanoribbons. This effect;has the potential to be used in identifying the scattering mechanisms in;graphene. The results also provide an explanation for the experimentally;found, intriguing differences in the behavior of the magnetoresistance;of graphene Hall bars placed on different substrates. Additionally, our;simulations indicate that the peaks in the longitudinal resistance tend;to become pinned to fractionally quantized values, as different;transport modes have very different scattering properties.;Harju, Ari/C-2828-2009;Harju, Ari/0000-0002-2233-2896;1;0;0;0;1;1098-0121;WOS:000311715100004;;;J;White, Alexander J.;Sukharev, Maxim;Galperin, Michael;Molecular nanoplasmonics: Self-consistent electrodynamics in;current-carrying junctions;PHYSICAL REVIEW B;86;20;205324;10.1103/PhysRevB.86.205324;NOV 30 2012;2012;We consider a biased molecular junction subjected to an external;time-dependent electromagnetic field. We discuss local field formation;due to both surface plasmon-polariton excitations in the contacts and;the molecular response. Employing realistic parameters we demonstrate;that such self-consistent treatment is crucial for the proper;description of the junction transport characteristics.;White, Alexander/D-8754-2014;White, Alexander/0000-0002-7771-3899;3;0;0;0;3;1098-0121;WOS:000311715100010;;;J;Wierschem, Keola;Kato, Yasuyuki;Nishida, Yusuke;Batista, Cristian D.;Sengupta, Pinaki;Magnetic and nematic orderings in spin-1 antiferromagnets with;single-ion anisotropy;PHYSICAL REVIEW B;86;20;201108;10.1103/PhysRevB.86.201108;NOV 30 2012;2012;We study a spin-1 Heisenberg model with exchange interaction J, uniaxial;single-ion exchange anisotropy D, and Zeeman coupling to a magnetic;field B parallel to the symmetry axis. We compute the (D/J, B/J) quantum;phase diagram for square and simple cubic lattices by combining;analytical and quantum Monte Carlo approaches, and find a transition;between XY antiferromagnetic and ferronematic phases that spontaneously;break the U(1) symmetry of the model. In the language of bosonic gases,;this is a transition between a Bose-Einstein condensate (BEC) of single;bosons and a BEC of pairs. Our work opens up new avenues for measuring;this transition in real magnets.;8;0;0;0;8;1098-0121;WOS:000311715100001;;;J;Wu, Chien-Te;Valls, Oriol T.;Halterman, Klaus;Proximity effects in conical-ferromagnet/superconductor bilayers;PHYSICAL REVIEW B;86;18;184517;10.1103/PhysRevB.86.184517;NOV 30 2012;2012;We present a study of various aspects of proximity effects in F/S;(ferromagnet/superconductor) bilayers, where F has a spiral magnetic;texture such as that found in holmium, erbium, and other materials, and;S is a conventional s-wave superconductor. We numerically solve the;Bogoliubov-de Gennes (BdG) equations self-consistently and use the;solutions to compute physical quantities relevant to the proximity;effects in these bilayers. We obtain the relation between the;superconducting transition temperature T-c and the thicknesses d(F) of;the magnetic layer by solving the linearized BdG equations. We find that;the T-c (d(F)) curves include multiple oscillations. Moreover, the;system may be reentrant not only with d(F), as is the case when the;magnet is uniform, but also with temperature T : the superconductivity;disappears in certain ranges of d(F) or T. The T reentrance reported;here occurs when d(F) is larger than the spatial period of the conical;exchange field. We compute the condensation free energies and entropies;from the full BdG equations and find the results are in agreement with;T-c values obtained by linearization. The inhomogeneous nature of the;magnet makes it possible for all odd triplet pairing components to be;induced. We have investigated their properties and found that, as;compared to the singlet amplitude, both the m = 0 and +/- 1 triplet;components exhibit long-range penetration. For nanoscale bilayers, the;proximity lengths for both layers are also obtained. These lengths;oscillate with d(F) and they are found to be long range on both sides.;These results are shown to be consistent with recent experiments. We;also calculate the reverse proximity effect described by the;three-dimensional local magnetization, and the local density of states,;which reveals important energy-resolved signatures associated with the;proximity effects.;6;0;0;0;6;1098-0121;WOS:000311714700005;;;J;Altarelli, M.;Kurta, R. P.;Vartanyants, I. A.;X-ray cross-correlation analysis and local symmetries of disordered;systems: General theory (vol 82, 104207, 2010);PHYSICAL REVIEW B;86;17;179904;10.1103/PhysRevB.86.179904;NOV 29 2012;2012;1;0;0;0;1;1098-0121;WOS:000311693600006;;;J;Beheshtian, J.;Sadeghi, A.;Neek-Amal, M.;Michel, K. H.;Peeters, F. M.;Induced polarization and electronic properties of carbon-doped boron;nitride nanoribbons;PHYSICAL REVIEW B;86;19;195433;10.1103/PhysRevB.86.195433;NOV 29 2012;2012;The electronic properties of boron nitride nanoribbons (BNNRs) doped;with a line of carbon atoms are investigated using density functional;calculations. By replacing a line of alternating B and N atoms with;carbons, three different configurations are possible depending on the;type of the atoms which bond to the carbons. We found very different;electronic properties for these configurations: (i) the NCB arrangement;is strongly polarized with a large dipole moment having an unexpected;direction, (ii) the BCB and NCN arrangements are nonpolar with zero;dipole moment, (iii) the doping by a carbon line reduces the band gap;regardless of the local arrangement of the borons and the nitrogens;around the carbon line, and (iv) the polarization and energy gap of the;carbon-doped BNNRs can be tuned by an electric field applied parallel to;the carbon line. Similar effects were found when either an armchair or;zigzag line of carbon was introduced.;Sadeghi, Ali/D-1554-2013;8;0;0;0;8;1098-0121;WOS:000311694200006;;;J;Chi, Hang;Kim, Hyoungchul;Thomas, John C.;Su, Xianli;Stackhouse, Stephen;Kaviany, Massoud;Van der Ven, Anton;Tang, Xinfeng;Uher, Ctirad;Configuring pnicogen rings in skutterudites for low phonon conductivity;PHYSICAL REVIEW B;86;19;195209;10.1103/PhysRevB.86.195209;NOV 29 2012;2012;Dominant heat-carrying modes in skutterudites are associated with;vibrations of the pnicogen rings. Apart from filling the structural;cages with foreign species, disrupting the pnicogen ring structure by;substitutional alloying should be an effective approach to reduce;thermal conductivity. In this paper we explore alloying configurations;of pnicogen rings (Sb rings in the case of CoSb3) that yield;particularly low values of the thermal conductivity. We find that IV-VI;double substitution (replacing two Sb atoms with one atom each from the;column IV and column VI elements to achieve an average charge of two Sb;atoms) is a very effective approach. Our ab initio calculations, in;combination with a cluster expansion, have allowed us to identify stable;alloy configurations on the Sb rings. Subsequent molecular and lattice;dynamics simulations on low energy configurations establish the range of;atomic displacement parameters and values of the thermal conductivity.;Theoretical results are in good agreement with our experimental thermal;conductivity values. Combining both approaches of compensated double;substitution and filling of structural cages should be an effective way;of improving the thermoelectric figure of merit of skutterudites.;Su, Xianli/A-9685-2012; Chi, Hang/F-1537-2011; Thomas, John/A-2764-2009; Kim, Hyoungchul/F-2557-2014;Chi, Hang/0000-0002-1299-1150; Thomas, John/0000-0002-3162-0152; Kim,;Hyoungchul/0000-0003-3109-660X;8;0;0;0;8;1098-0121;WOS:000311694200003;;;J;Fortmann, C.;Niemann, C.;Glenzer, S. H.;Theory of x-ray scattering in high-pressure electrides;PHYSICAL REVIEW B;86;17;174116;10.1103/PhysRevB.86.174116;NOV 29 2012;2012;We report on a theoretical model for the calculation of x-ray scattering;from high-pressure electrides. By treating interstitial electrons as;effective anions forming a sublattice within the crystal, we explicitly;account for Bragg reflections from the sublattice as well as for;scattering interferences between the ion lattice and the anion;sublattice. The additional reflections and interferences lead to;significant modifications of the static structure factor as compared to;the pure lattices. Our results are important for accurate calculations;of material properties in the high-pressure phase and allow for direct;experimental verification of electride phases in matter at ultrahigh;pressures through angle-resolved x-ray scattering.;2;0;0;0;2;1098-0121;WOS:000311693600001;;;J;Guclu, Caner;Campione, Salvatore;Capolino, Filippo;Hyperbolic metamaterial as super absorber for scattered fields generated;at its surface;PHYSICAL REVIEW B;86;20;205130;10.1103/PhysRevB.86.205130;NOV 29 2012;2012;We show that hyperbolic metamaterials (HMs) that exhibit hyperbolic;wave-vector dispersion diagrams possess two important features related;to super absorption: The total power scattered by a nanosphere is (i);greatly enhanced when placed at the HM surface, compared to other;material surfaces, and (ii) almost totally directed into the HM. We show;that these two features are peculiar of HM interfaces, and we support;them using a spectral theory study of transverse-electric and magnetic;waves scattered by a subwavelength nanosphere. We analyze the;nanosphere's scattered power absorbed by various substrate;configurations. We also consider various nanosphere materials.;22;0;0;0;22;1098-0121;WOS:000311694300002;;;J;Hebbache, M.;Entanglement of electron spins and geometric phases in the diamond color;center coupled to the P1 center;PHYSICAL REVIEW B;86;19;195316;10.1103/PhysRevB.86.195316;NOV 29 2012;2012;Impurity spins in semiconductors are potential quantum bits.;Entanglement and topological phases are key resources in quantum;computation. We prove that the coupled electron spins carried by a;diamond nitrogen-vacancy color center (NV-) and a single substitutional;nitrogen impurity (P1 center) are entangled in the immediate vicinity of;the level anticrossing that appears in the Zeeman energy diagram at;about 500 G. We also determine the Aharonov-Anandan, Berry, and marginal;geometric phases that can be accumulated by the state vectors of this;spin system when it is magnetically transported around a closed path. At;the resonance where the gap between two energy levels is minimum, the;geometric phases undergo discontinuities, and the entanglement of the;two electron spins is maximal.;2;0;0;0;2;1098-0121;WOS:000311694200004;;;J;Kerdsongpanya, Sit;Alling, Bjorn;Eklund, Per;Effect of point defects on the electronic density of states of ScN;studied by first-principles calculations and implications for;thermoelectric properties;PHYSICAL REVIEW B;86;19;195140;10.1103/PhysRevB.86.195140;NOV 29 2012;2012;We have investigated the effect of defects and impurities on the;electronic density of states of scandium nitride using first-principles;calculations with the generalized gradient approximation and hybrid;functionals for the exchange correlation energy. Our results show that;Sc and N vacancies can introduce asymmetric peaks in the density of;states close to the Fermi level. We also find that the N vacancy states;are sensitive to total electron concentration of the system due to their;possibility for spin polarization. Substitutional point defects shift;the Fermi level in the electronic band according to their valence but do;not introduce sharp features. The energetics and electronic structure of;defect pairs are also studied. By using hybrid functional calculations,;a correct description of the band gap of scandium nitride is obtained.;Our results envisage ways for improving the thermoelectric figure of;merit of ScN by electronic structure engineering through stoichiometry;tuning and doping.;Eklund, Per/B-7677-2011; Alling, Bjorn/I-3193-2012;Eklund, Per/0000-0003-1785-0864; Alling, Bjorn/0000-0001-5863-5605;8;0;0;0;8;1098-0121;WOS:000311694200001;;;J;Kim, Jiseok;Fischetti, Massimo V.;Aboud, Shela;Structural, electronic, and transport properties of silicane nanoribbons;PHYSICAL REVIEW B;86;20;205323;10.1103/PhysRevB.86.205323;NOV 29 2012;2012;Silicane ribbons do not suffer from aromatic dependence of the band gap;making them a more promising candidate for near-term nanoelectronic;application compared to armchair graphene nanoribbons. The structural,;electronic, and transport properties of free-standing sp(3)-hybridized;armchair- and zigzag-edge silicane nanoribbons have been investigated;using ab initio and nonlocal empirical pseudopotential calculations.;Under ambient conditions, two-dimensional silicane sheets will;spontaneously break into stable one-dimensional ribbons similar to;density functional theory studies of graphene ribbons. The calculated;low-field electron mobility and ballistic conductance show a strong edge;dependence, due to differences in the effective mass and momentum;relaxation rates along the two transport directions. The mobility in;zigzag-edge ribbons is found to be approximately twenty times higher;than in armchair-edge ribbons.;7;0;0;0;7;1098-0121;WOS:000311694300004;;;J;Kim, Kyou-Hyun;Payne, David A.;Zuo, Jian-Min;Symmetry of piezoelectric (1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (x=0.31);single crystal at different length scales in the morphotropic phase;boundary region;PHYSICAL REVIEW B;86;18;184113;10.1103/PhysRevB.86.184113;NOV 29 2012;2012;We use probes of three different length scales to examine symmetry of (1;- x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) single crystals in the;morphotropic phase boundary (MPB) region at composition x = 0.31;(PMN-31% PT). On the macroscopic scale, x-ray diffraction (XRD) shows a;mixture of strong and weak diffraction peaks of different widths. The;closest match to XRD peak data is made with monoclinic Pm (M-C);symmetry. On the local scale of a few nanometers, convergent beam;electron diffraction (CBED) studies, with a 1.6-nm electron probe,;reveal no obvious symmetry. These CBED experimental patterns can be;approximately matched with simulations based on monoclinic symmetry,;which suggests locally distorted monoclinic structure. A monoclinic Cm;(M-A or M-B)-like symmetry could also be obtained from certain regions;of the crystal by using a larger electron probe size of several tens of;nanometers in diameter. Thus the monoclinic symmetry of single crystal;PMN-31% PT is developed only in parts of the crystal by averaging over;locally distorted structure on the scale of few tens of nanometers. The;macroscopic symmetry observed by XRD is a result of averaging from the;local structure in PMN-31% PT single crystal. The lack of local symmetry;at a few nanometers scale suggests that the polarization switching;results from a change in local displacements, which are not restricted;to specific symmetry planes or directions.;2;0;0;0;2;1098-0121;WOS:000311693900002;;;J;Kossacki, P.;Faugeras, C.;Kuehne, M.;Orlita, M.;Mahmood, A.;Dujardin, E.;Nair, R. R.;Geim, A. K.;Potemski, M.;Circular dichroism of magnetophonon resonance in doped graphene;PHYSICAL REVIEW B;86;20;205431;10.1103/PhysRevB.86.205431;NOV 29 2012;2012;The polarization-resolved Raman-scattering response due to E-2g phonons;in monolayer graphene has been investigated in magnetic fields up to 29;T. The hybridization of the E-2g phonon is only observed with the;fundamental inter-Landau-level excitation (involving the n = 0 Landau;level) and in just one of the two configurations of the circularly;cross-polarized excitation and scattered light. This polarization;anisotropy of the magnetophonon resonance is shown to be inherent to;relatively strongly doped graphene samples with carrier concentrations;typical for graphene deposited on Si/SiO2 substrates.;Dujardin, Erik/A-2748-2010; Raveendran Nair, Rahul/G-5839-2010; Orlita, Milan/H-1130-2014;Dujardin, Erik/0000-0001-7242-9250;;3;0;0;0;3;1098-0121;WOS:000311694300005;;;J;Kostylev, M.;Stashkevich, A. A.;Roussigne, Y.;Grigoryeva, N. A.;Mistonov, A. A.;Menzel, D.;Sapoletova, N. A.;Napolskii, K. S.;Eliseev, A. A.;Lukashin, A. V.;Grigoriev, S. V.;Samarin, S. N.;Microwave properties of Ni-based ferromagnetic inverse opals;PHYSICAL REVIEW B;86;18;184431;10.1103/PhysRevB.86.184431;NOV 29 2012;2012;Investigations of microwave properties of Ni-based inverse ferromagnetic;opal-like film with the [111] axis of the fcc structure along the normal;direction to the film have been carried out in the 2-18 GHz frequency;band. We observed multiple spin wave resonances for the magnetic field;applied perpendicular to the film, i.e., along the [111] axis of this;artificial crystal. For the field applied in the film plane, a broad;band of microwave absorption is observed, which does not contain a fine;structure. The field ranges of the responses observed are quite;different for these two magnetization directions. This suggests a;collective magnetic ground state or shape anisotropy and collective;microwave dynamics for this foam-like material. This result is in;agreement with SQUID measurements of hysteresis loops for the material.;Two different models for this collective behavior are suggested that;satisfactorily explain the major experimental results.;Lukashin, Alexey/F-6746-2013; Mistonov, Alexander/H-2098-2013; Grigoryeva, Natalia/K-2253-2013; Kostylev, Mikhail/H-5214-2014;Mistonov, Alexander/0000-0003-0138-3579; Grigoryeva,;Natalia/0000-0002-9910-6192;;1;0;0;0;1;1098-0121;WOS:000311693900004;;;J;Kvashnin, Y. O.;Khmelevskyi, S.;Kudrnovsky, J.;Yaresko, A. N.;Genovese, L.;Bruno, P.;Noncollinear magnetic ordering in compressed FePd3 ordered alloy: A;first principles study;PHYSICAL REVIEW B;86;17;174429;10.1103/PhysRevB.86.174429;NOV 29 2012;2012;By means of ab initio calculations based on the density functional;theory we investigated the magnetic phase diagram of ordered FePd3 alloy;as a function of external pressure. Considering several magnetic;configurations we concluded that the system under pressure has a;tendency toward noncollinear spin alignment. Analysis of the Heisenberg;exchange parameters J(ij) revealed strong dependence of iron-iron;magnetic couplings on polarization of Pd atoms. To take into account;that effect we built an extended Heisenberg model with higher order;(biquadratic) terms. Minimizing the energy of this Hamiltonian, fully;parametrized using the results of ab initio calculations, we found a;candidate for a ground state of compressed FePd3, which can be seen as;two interpenetrating "triple-Q" phases.;Genovese, Luigi/C-5937-2011; Bruno, Patrick/C-9159-2009; KUDRNOVSKY, Josef/G-5581-2014;Genovese, Luigi/0000-0003-1747-0247; Bruno, Patrick/0000-0002-2574-1943;;KUDRNOVSKY, Josef/0000-0002-9968-6748;1;0;0;0;1;1098-0121;WOS:000311693600004;;;J;Li, Wu;Lindsay, L.;Broido, D. A.;Stewart, Derek A.;Mingo, Natalio;Thermal conductivity of bulk and nanowire Mg2SixSn1-x alloys from first;principles;PHYSICAL REVIEW B;86;17;174307;10.1103/PhysRevB.86.174307;NOV 29 2012;2012;The lattice thermal conductivity (kappa) of the thermoelectric;materials, Mg2Si, Mg2Sn, and their alloys, are calculated for bulk and;nanowires, without adjustable parameters. We find good agreement with;bulk experimental results. For large nanowire diameters, size effects;are stronger for the alloy than for the pure compounds. For example, in;200 nm diameter nanowires kappa is lower than its bulk value by 30%,;20%, and 20% for Mg2Si0.6Sn0.4, Mg2Si, and Mg2Sn, respectively. For;nanowires less than 20 nm thick, the relative decrease surpasses 50%,;and it becomes larger in the pure compounds than in the alloy. At room;temperature, kappa of Mg2SixSn1-x is less sensitive to nanostructuring;size effects than SixGe1-x, but more sensitive than PbTexSe1-x. This;suggests that further improvement of Mg2SixSn1-x as a nontoxic;thermoelectric may be possible.;Lindsay, Lucas/C-9221-2012; Stewart, Derek/B-6115-2008;25;1;0;0;25;1098-0121;WOS:000311693600002;;;J;Niklasson, Anders M. N.;Cawkwell, Marc J.;Fast method for quantum mechanical molecular dynamics;PHYSICAL REVIEW B;86;17;174308;10.1103/PhysRevB.86.174308;NOV 29 2012;2012;As the processing power available for scientific computing grows,;first-principles Born-Oppenheimer molecular dynamics simulations are;becoming increasingly popular for the study of a wide range of problems;in materials science, chemistry, and biology. Nevertheless, the;computational cost of Born-Oppenheimer molecular dynamics still remains;prohibitively large for many potential applications. Here we show how to;avoid a major computational bottleneck: the self-consistent-field;optimization prior to force calculations. The optimization-free quantum;mechanical molecular dynamics method gives trajectories that are almost;indistinguishable from an "exact" microcanonical Born-Oppenheimer;molecular dynamics simulation even when low-prefactor linear scaling;sparse matrix algebra is used. Our findings show that the computational;gap between classical and quantum mechanical molecular dynamics;simulations can be significantly reduced.;4;0;0;0;4;1098-0121;WOS:000311693600003;;;J;Ong, Zhun-Yong;Fischetti, Massimo V.;Theory of interfacial plasmon-phonon scattering in supported graphene;(vol 86, 165422, 2012);PHYSICAL REVIEW B;86;19;199904;10.1103/PhysRevB.86.199904;NOV 29 2012;2012;Ong, Zhun-Yong/B-9486-2013;Ong, Zhun-Yong/0000-0003-2668-6453;6;0;0;0;6;1098-0121;WOS:000311694200007;;;J;Per, Manolo C.;Snook, Ian K.;Russo, Salvy P.;Efficient calculation of unbiased expectation values in diffusion;quantum Monte Carlo;PHYSICAL REVIEW B;86;20;201107;10.1103/PhysRevB.86.201107;NOV 29 2012;2012;Despite the proven utility of quantum Monte Carlo methods in addressing;the quantum many-body problem, many important observables are difficult;to calculate due to the presence of large, and sometimes divergent,;statistical errors. The present state of the art allows the construction;of renormalized estimators which result in finite variances, but which;invariably include some systematic bias. We present a simple method for;calculating unbiased expectation values of local operators in the;diffusion quantum Monte Carlo method which is applicable to both bare;and renormalized estimators, allowing the accurate calculation of;important properties such as forces.;snook, ian/A-3427-2009; Per, Manolo/C-3680-2011;1;0;0;0;1;1098-0121;WOS:000311694300001;;;J;Simonson, J. W.;Smith, G. J.;Post, K.;Pezzoli, M.;Kistner-Morris, J. J.;McNally, D. E.;Hassinger, J. E.;Nelson, C. S.;Kotliar, G.;Basov, D. N.;Aronson, M. C.;Magnetic and structural phase diagram of CaMn2Sb2;PHYSICAL REVIEW B;86;18;184430;10.1103/PhysRevB.86.184430;NOV 29 2012;2012;On the basis of magnetic, transport, and optical measurements performed;on single crystals, we report CaMn2Sb2 to be an antiferromagnetic;insulator that exhibits weak ferromagnetic order above the Neel;temperature. Magnetic susceptibility measurements reveal the magnitude;of the high-temperature Curie-Weiss moment to be only half as large as;the ground-state ordered moment, while electronic-structure calculations;based on crystallographic measurements suggest a crystal-field-induced;spin-state transition does not occur. The antiferromagnetic state is;relatively insensitive to both doping and modest pressures, while the;ferromagnetism can be readily tuned by either. Infrared transmission and;pressure-dependent resistivity measurements suggest proximity to an;electronic delocalization transition. We suggest the ferromagnetic state;may be the signature of magnetic polarons.;1;1;0;0;1;1098-0121;WOS:000311693900003;;;J;Stishov, Sergei M.;Petrova, Alla E.;Sidorov, Vladimir A.;Menzel, Dirk;Self-doping effects in cobalt silicide CoSi: Electrical, magnetic,;elastic, and thermodynamic properties (vol 86, 064433, 2012);PHYSICAL REVIEW B;86;17;179903;10.1103/PhysRevB.86.179903;NOV 29 2012;2012;0;0;0;0;0;1098-0121;WOS:000311693600005;;;J;Thede, M.;Xiao, F.;Baines, Ch.;Landee, C.;Morenzoni, E.;Zheludev, A.;Ordering in weakly coupled random singlet spin chains;PHYSICAL REVIEW B;86;18;180407;10.1103/PhysRevB.86.180407;NOV 29 2012;2012;The influence of bond randomness on long-range magnetic ordering in the;weakly coupled S = 1/2 antiferromagnetic spin chain materials;Cu(py)(2)(Cl1-xBrx)(2) is studied by muon spin rotation and bulk;measurements. Disorder is found to have a strong effect on the ordering;temperature T-N, and an even stronger one on the saturation;magnetization m(0), but considerably more so in the effectively;lower-dimensional Br-rich materials. The observed behavior is attributed;to random singlet ground states of individual spin chains, but remains;in contradiction with chain mean-field theory [Joshi and Yang, Phys.;Rev. B 67, 174403 (2003)] predictions. In this context, we discuss the;possibility of a universal distribution of ordered moments in the weakly;coupled random singlet chains model.;Thede, Matthias/L-2975-2013;4;0;0;0;4;1098-0121;WOS:000311693900001;;;J;Usov, V.;Stoyanov, S.;Coileain, C. O.;Toktarbaiuly, O.;Shvets, I. V.;Antiband instability on vicinal Si(111) under the condition of;diffusion-limited sublimation;PHYSICAL REVIEW B;86;19;195317;10.1103/PhysRevB.86.195317;NOV 29 2012;2012;In this paper, we investigate the antiband instability on vicinal;Si(111) surfaces with different angles of misorientation. It is known;that prolonged direct current-annealing of Si(111) results in the;formation of antibands; i.e., the step bunches with the opposite slope;to the primary bunches. We provide a theoretical description of antiband;formation via the evolution of the atomic steps' shape. We also derive a;criterion for the onset of the antiband instability under the conditions;of sublimation controlled by slow adatom surface diffusion. We examine;this criterion experimentally by studying the initial stage of the;antiband formation at a constant temperature of 1270 degrees C while;systematically varying the applied electromigration field. The;experiment strongly supports the validity of the derived theoretical;criterion and indicates the importance of accounting for the factor of;critical field in the theoretical modeling of step bunching or antiband;instabilities. Deduced from the comparison of theory and experiment, the;Si surface atoms' effective charge cannot exceed double the elementary;charge, set by the lower limit of kinetic characteristic length d(s) =;0.3 nm. Using d(s) = 1.7 - 4.5 nm draws values of the effective charge;in line with the values reported in earlier studies.;Shvets, Igor/J-8710-2013;0;0;0;0;0;1098-0121;WOS:000311694200005;;;J;Weber, Cedric;Mila, Frederic;Anticollinear magnetic order induced by impurities in the frustrated;Heisenberg model of pnictides;PHYSICAL REVIEW B;86;18;184432;10.1103/PhysRevB.86.184432;NOV 29 2012;2012;We present Monte Carlo simulations for a classical antiferromagnetic;Heisenberg model with both nearest (J(1)) and next-nearest (J(2));exchange couplings on the square lattice in the presence of nonmagnetic;impurities. We show that the order-by-disorder entropy selection,;associated with the Ising-like phase transition that appears for;J(2)/J(1) > 1/2 in the pure spin model, is quenched at low temperature;due to the presence of nonmagnetic impurities. Evidence that a new;competing order is stabilized around the impurities and in turn induces;a reentrance phase transition is reported. Implications for local;magnetic measurement of the parent compound of iron pnictides are;briefly discussed.;Weber, Cedric/D-5027-2014;Weber, Cedric/0000-0002-6989-2700;4;0;0;0;4;1098-0121;WOS:000311693900005;;;J;Weston, L.;Cui, X. Y.;Delley, B.;Stampfl, C.;Band offsets and polarization effects in wurtzite ZnO/Mg0.25Zn0.75O;superlattices from first principles;PHYSICAL REVIEW B;86;20;205322;10.1103/PhysRevB.86.205322;NOV 29 2012;2012;Using first-principles calculations, we investigate the band offsets,;built-in electric fields, and band gaps of (0001)-oriented wurtzite;ZnO/Mg0.25Zn0.75O superlattices, including the dependence on;superlattice geometry and strain. Significant built-in electric fields;form inside the quantum-well region that are found to be tunable over;the range 0.24 MV/cm <= E-w <= 0.63 MV/cm, and potentially up to 1MV/cm;by varying the relative width of the well and barrier regions. The;valence band offset at the ZnO/Mg0.25Zn0.75O interface is calculated to;be 0.25-0.26 eV which, in contrast to the "common anion rule," is a;significant portion of the total band offset, and this is in support of;recent experiment. Calculated values for the valence band offset were;found to be insensitive to variations in superlattice geometry and;strain. The band gap of the superlattice is determined by the competing;effects of quantum confinement and the quantum-confined Stark effect,;with the former being more dominant for the systems investigated. These;findings will be useful in the design and optimization of ZnO/MgxZn1-xO;superlattices for electronics and optoelectronics applications.;Delley, Bernard/E-1336-2014;Delley, Bernard/0000-0002-7020-2869;3;0;1;0;4;1098-0121;WOS:000311694300003;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;PHYSICAL REVIEW B;86;19;195141;10.1103/PhysRevB.86.195141;NOV 29 2012;2012;We perform realistic first-principles calculations of iron chalcogenides;and ruthenate-based materials to identify experimental signatures of;Hund's-coupling-induced correlations in these systems. We find that FeTe;and KxFe2-yAs2 display unusual orbital-dependent fractional power-law;behavior in their quasiparticle self-energy and optical conductivity, a;phenomenon first identified in SrRuO3. Strong incoherence in the;paramagnetic state of these materials results in electronic states;hidden to angle-resolved photoemission spectroscopy which reemerge at;low temperatures. We identify the effective low-energy Hamiltonian;describing these systems and show that these anomalies are not;controlled by the proximity to a quantum critical point but result from;coexistence of fast quantum mechanical orbital fluctuations and slow;spin fluctuations.;Yin, Zhiping/G-3949-2012;Yin, Zhiping/0000-0001-8679-5251;10;0;0;0;10;1098-0121;WOS:000311694200002;;;J;Kumar, A.;Fennie, C. J.;Rabe, K. M.;Spin-lattice coupling and phonon dispersion of CdCr2O4 from first;principles;PHYSICAL REVIEW B;86;18;184429;10.1103/PhysRevB.86.184429;NOV 28 2012;2012;First-principles calculations are used to investigate the effects of;magnetic ordering on the minimum-energy structure and on the full phonon;dispersion relation of CdCr2O4, focusing on the changes through the;coupled magnetic/structural transition which shows relief of the;geometric frustration of the antiferromagnetic ordering on the;pyrochlore lattice. We computed the full phonon dispersion relations for;the ferromagnetic and antiferromagnetic orderings in cubic and;tetragonal structures of CdCr2O4. We extracted the phonon dispersion for;the cubic paramagnetic phase and found that it compares wellwith the;experimental results. The AFM ordering is seen to lower the symmetry and;induce a lattice distortion comparable in magnitude to that observed in;the transition. While the spin-phonon couplings are large for modes;which involve displacement of the Cr atoms, there are no unstable modes;at any point in the Brillouin zone for either of the magnetic orderings;considered, and thus we conclude that the phase transition is driven not;by spin-phonon coupling, but by the atomic forces and stresses induced;by the magnetic order. Finally, by comparison of the phonon frequencies;for structures with different magnetic orderings and structural;distortions, we find that the spin-phonon coupling, rather than the;coupling of the phonons to the structural change, is the dominant factor;in the observed changes of phonon frequencies through the phase;transition.;Kumar, Anil/A-9834-2013;Kumar, Anil/0000-0002-4901-8987;1;0;0;0;1;1098-0121;WOS:000311604700002;;;J;Lin, Shi-Zeng;Bulaevskii, Lev N.;Batista, Cristian D.;Vortex dynamics in ferromagnetic superconductors: Vortex clusters,;domain walls, and enhanced viscosity;PHYSICAL REVIEW B;86;18;180506;10.1103/PhysRevB.86.180506;NOV 28 2012;2012;We demonstrate that there is a long-range vortex-vortex attraction in;ferromagnetic superconductors due to polarization of the magnetic;moments. Vortex clusters are then stabilized in the ground state for low;vortex densities. The motion of vortex clusters driven by the Lorentz;force excites magnons. This regime becomes unstable at a threshold;velocity above which domain walls are generated for slow relaxation of;the magnetic moments and the vortex configuration becomes modulated.;This dynamics of vortices and magnetic moments can be probed by;transport measurements.;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;6;0;0;0;6;1098-0121;WOS:000311604700001;;;J;Wong, Chris L. M.;Law, K. T.;Majorana Kramers doublets in dx2-y2-wave superconductors with Rashba;spin-orbit coupling;PHYSICAL REVIEW B;86;18;184516;10.1103/PhysRevB.86.184516;NOV 28 2012;2012;In this work, we show that a quasi-one-dimensional d(x2-y2)-wave;superconductor with Rashba spin-orbit coupling is a DIII class,;time-reversal invariant, topological superconductor (TS), which supports;a Majorana Kramers Doublet (MKD) at each end of the TS. A MKD is a pair;of Majorana end states (MESs) protected by time-reversal symmetry (TRS).;An external magnetic field breaks TRS and drives the system from DIII to;D class in which case a single MES appears at each end of the TS. We;show that a MKD induces resonant Andreev reflection with zero-bias;conductance peak of 4e(2)/h. Experimental realizations of the proposed;model are discussed.;Law, Kam/H-1410-2011;19;1;0;0;19;1098-0121;WOS:000311604700003;;;J;De Luca, M.;Pettinari, G.;Ciatto, G.;Amidani, L.;Filippone, F.;Polimeni, A.;Fonda, E.;Boscherini, F.;Bonapasta, A. Amore;Giubertoni, D.;Knuebel, A.;Lebedev, V.;Capizzi, M.;Identification of four-hydrogen complexes in In-rich InxGa1-xN (x > 0.4);alloys using photoluminescence, x-ray absorption, and density functional;theory;PHYSICAL REVIEW B;86;20;201202;10.1103/PhysRevB.86.201202;NOV 28 2012;2012;Postgrowth hydrogen incorporation in In-rich InxGa1-xN (x > 0.4) alloys;strongly modifies the optical and structural properties of the material:;A large blueshift of the emission and absorption energies is accompanied;by a remarkable broadening of the interatomic-distance distribution, as;probed by synchrotron radiation techniques. Both effects vanish at a;finite In-concentration value (x similar to 0.5). Synergic x-ray;absorption measurements and first-principle calculations unveil two;different defective species forming upon hydrogenation: one due to the;high chemical reactivity of H, the other ascribed to mere lattice;damage. In the former species, four H atoms bind to as many N atoms, all;nearest-neighbors of a same In atom. The stability of this peculiar;complex, which is predicted to behave as a donor, stems from atomic;displacements cooperating to reduce local strain.;Fonda, Emiliano/D-9666-2011; Filippone, Francesco/I-4718-2012; Pettinari, Giorgio/M-8678-2014;Filippone, Francesco/0000-0001-5862-1115; Pettinari,;Giorgio/0000-0003-0187-3770;1;0;0;0;1;1098-0121;WOS:000311605000001;;;J;Grytsyuk, Sergiy;Peskov, Maxim V.;Schwingenschloegl, Udo;First-principles modeling of interfaces between solids with large;lattice mismatch: The prototypical CoO(111)/Ni(111) interface;PHYSICAL REVIEW B;86;17;174115;10.1103/PhysRevB.86.174115;NOV 28 2012;2012;In this work we investigate the CoO(111)/Ni(111) interface by;first-principles calculations, focusing on its structure and stability.;To satisfy the approximate 5:6 ratio of the CoO and Ni lattice;constants, we construct a supercell with 5 x 5 Co (O) and 6 x 6 Ni atoms;per layer in the bulk regions. For the interface Ni layer and the;adjacent Ni layer we consider different configurations and study the;binding energy. We show for an ideal CoO interface terminated by 5 x 5 O;atoms that the structure is more stable if there are 5 x 5 Ni atoms next;to it instead of 6 x 6 as in the bulk. In addition, we observe that a;transition layer with 31 or 33 Ni atoms located between the interface 5;x 5 Ni and bulk 6 x 6 Ni layers (which partially reflects the structures;of both these layers) enhances the stability of the CoO/Ni interface.;The electronic and magnetic modifications induced by the interface;formation are discussed.;3;0;0;0;3;1098-0121;WOS:000311604400001;;;J;Luekermann, D.;Sologub, S.;Pfnuer, H.;Klein, C.;Horn-von Hoegen, M.;Tegenkamp, C.;Scattering at magnetic and nonmagnetic impurities on surfaces with;strong spin-orbit coupling;PHYSICAL REVIEW B;86;19;195432;10.1103/PhysRevB.86.195432;NOV 28 2012;2012;Adsorption-induced reduction of surface-state conductivity in epitaxial;Bi(111) films, a prototype system with large Rashba-induced;surface-state splitting, by adsorbed atoms of Bi, Fe, and Co has been;investigated by macroscopic surface magnetotransport measurements at a;temperature of 10 K. A detailed analysis of magnetotransport, dc;transport, and Hall data reveals that the scattering efficiencies for Co;and Fe are larger by a factor of 2 than that for Bi. While for the;latter charge transfer and change of band filling near the Fermi level;are negligible, we find an increase of hole concentration upon Co and Fe;adsorption. These atoms act as acceptors and immobilize on average about;0.5 electrons per adsorbed atom. Besides the dominant classical;magnetoconductance signal the films show signatures of weak;antilocalization, reflecting the strong spin-orbit coupling in Bi(111);surface states. This behavior can be changed to weak localization by the;adsorption of high concentrations (0.1 monolayers) of magnetic;impurities (Fe, Co), similarly to results found on the topological;insulator Bi2Se3. Our results demonstrate that details of chemical bond;formation for impurities are crucial for local spin moments and;electronic scattering properties.;5;0;0;0;5;1098-0121;WOS:000311604900001;;;J;Molina-Sanchez, A.;Garcia-Cristobal, A.;Bester, G.;Semiempirical pseudopotential approach for nitride-based nanostructures;and ab initio based passivation of free surfaces;PHYSICAL REVIEW B;86;20;205430;10.1103/PhysRevB.86.205430;NOV 28 2012;2012;We present a semiempirical pseudopotential method based on screened;atomic pseudopotentials and derived from ab initio calculations. This;approach is motivated by the demand for pseudopotentials able to address;nanostructures, where ab initio methods are both too costly and;insufficiently accurate at the level of the local density approximation,;while mesoscopic effective-mass approaches are inapplicable due to the;small size of the structures along, at least, one dimension. In this;work, we improve the traditional pseudopotential method by a two-step;process: First, we invert a set of self-consistently determined screened;ab initio potentials in wurtzite GaN for a range of unit-cell volumes,;thus determining spherically symmetric and structurally averaged atomic;potentials. Second, we adjust the potentials to reproduce observed;excitation energies. We find that the adjustment represents a reasonably;small perturbation over the potential, so that the ensuing potential;still reproduces the original wave functions, while the excitation;energies are significantly improved. We furthermore deal with the;passivation of the dangling bonds of free surfaces which is relevant for;the study of nanowires and colloidal nanoparticles. We present a;methodology to derive passivant pseudopotentials from ab initio;calculations. We apply our pseudopotential approach to the exploration;of the confinement effects on the electronic structure of GaN nanowires.;Bester, Gabriel/I-4414-2012;Bester, Gabriel/0000-0003-2304-0817;1;0;0;0;1;1098-0121;WOS:000311605000005;;;J;Patel, Aavishkar A.;Dutta, Amit;Sudden quenching in the Kitaev honeycomb model: Study of defect and heat;generation;PHYSICAL REVIEW B;86;17;174306;10.1103/PhysRevB.86.174306;NOV 28 2012;2012;We study the behavior of the defect and heat densities under sudden;quenching near the quantum critical points in the two-dimensional Kitaev;honeycomb model both in the thermodynamic and nonthermodynamic limits.;We consider quenches starting from a quantum critical point into the;gapped as well as the gapless phases. We choose points on the lines of;anisotropic quantum critical points as well as different points of;intersection of these lines as the initial points from where the;quenching starts. We find that the defect and heat densities display the;expected power-law scalings along with logarithmic corrections to;scaling (or cusp singularities) in certain cases. In the vicinity of;some of the intersection points, the scaling behaviors change,;indicating an effective dimensional reduction; the scaling behavior near;these points depends on the number of critical lines crossed in the;process of quenching. All the analytical predictions are also verified;by numerical integration.;1;0;0;0;1;1098-0121;WOS:000311604400002;;;J;Raith, Martin;Stano, Peter;Fabian, Jaroslav;Theory of spin relaxation in two-electron laterally coupled Si/SiGe;quantum dots;PHYSICAL REVIEW B;86;20;205321;10.1103/PhysRevB.86.205321;NOV 28 2012;2012;Highly accurate numerical results of phonon-induced two-electron spin;relaxation in silicon double quantum dots are presented. The relaxation,;enabled by spin-orbit coupling and the nuclei of Si-29 (natural or;purified abundance), is investigated for experimentally relevant;parameters, the interdot coupling, the magnetic field magnitude and;orientation, and the detuning. We calculate relaxation rates for zero;and finite temperatures (100 mK), concluding that our findings for zero;temperature remain qualitatively valid also for 100 mK. We confirm the;same anisotropic switch of the axis of prolonged spin lifetime with;varying detuning as recently predicted in GaAs. Conditions for possibly;hyperfine-dominated relaxation are much more stringent in Si than in;GaAs. For experimentally relevant regimes, the spin-orbit coupling,;although weak, is the dominant contribution, yielding anisotropic;relaxation rates of at least two orders of magnitude lower than in GaAs.;Raith, Martin/A-3357-2011; Stano, Peter/C-3016-2013; Fabian, Jaroslav/K-1700-2013;Fabian, Jaroslav/0000-0002-3009-4525;6;0;0;0;6;1098-0121;WOS:000311605000004;;;J;Romhanyi, Judit;Penc, Karlo;Multiboson spin-wave theory for Ba2CoGe2O7: A spin-3/2 easy-plane Neel;antiferromagnet with strong single-ion anisotropy;PHYSICAL REVIEW B;86;17;174428;10.1103/PhysRevB.86.174428;NOV 28 2012;2012;We consider the square-lattice antiferromagnetic Heisenberg Hamiltonian;extended with a single-ion axial anisotropy term as a minimal model for;the multiferroic Ba2CoGe2O7. Developing a multiboson spin-wave theory,;we investigate the dispersion of the spin excitations in this spin-3/2;system. As a consequence of a strong single-ion anisotropy, a stretching;(longitudinal) spin mode appears in the spectrum. The inelastic neutron;scattering spectra of Zheludev et al. [Phys. Rev. B 68, 024428 (2003)];are successfully reproduced by the low energy modes in the multiboson;spin-wave theory, and we anticipate the appearance of the spin;stretching modes at approximate to 4 meV that can be identified using;the calculated dynamical spin structure factors. We expect the;appearance of spin stretching modes for any S > 1/2 compound where the;single-ion anisotropy is significant.;Penc, Karlo/A-3092-2011;Penc, Karlo/0000-0002-2197-1370;5;1;0;0;5;1098-0121;WOS:000311604400004;;;J;Sarmadian, N.;Saniz, R.;Lamoen, D.;Partoens, B.;Influence of Al concentration on the optoelectronic properties of;Al-doped MgO;PHYSICAL REVIEW B;86;20;205129;10.1103/PhysRevB.86.205129;NOV 28 2012;2012;We use density functional theory within the local density approximation;to investigate the structural, electronic, and optical properties of;Al-doped MgO. The concentrations considered range from 6% to 56%. In the;latter case, we also compare the optical properties of the amorphous and;crystalline phases. We find that, overall, the electronic properties of;the crystalline phases change qualitatively little with Al;concentration. On the other hand, the changes in the electronic;structure in the amorphous phase are more important, most notably;because of deep impurity levels in the band gap that are absent in the;crystalline phase. This leads to observable effects in, e.g., the;optical absorption edge and in the refractive index. Thus, the latter;can be used to characterize the crystalline to amorphous transition with;Al doping level.;0;0;0;0;0;1098-0121;WOS:000311605000003;;;J;Smadici, S.;Nelson-Cheeseman, B. B.;Bhattacharya, A.;Abbamonte, P.;Interface ferromagnetism in a SrMnO3/LaMnO3 superlattice;PHYSICAL REVIEW B;86;17;174427;10.1103/PhysRevB.86.174427;NOV 28 2012;2012;Resonant soft x-ray absorption measurements at the O K edge on a;SrMnO3/LaMnO3 superlattice show a shoulder at the energy of doped holes,;which corresponds to the main peak of resonant scattering from the;modulation in the doped hole density. Scattering line shape at the Mn;L-3,L-2 edges has a strong variation below the ferromagnetic transition;temperature. This variation has a period equal to half the superlattice;superperiod and follows the development of the ferromagnetic moment,;pointing to a ferromagnetic phase developing at the interfaces. It;occurs at the resonant energies for Mn3+ and Mn4+ valences. A model for;these observations is presented, which includes a double-exchange;two-site orbital and the variation with temperature of the hopping;frequency t(ij) between the two sites.;Bhattacharya, Anand/G-1645-2011;Bhattacharya, Anand/0000-0002-6839-6860;1;0;0;0;1;1098-0121;WOS:000311604400003;;;J;Zanotto, Simone;Degl'Innocenti, Riccardo;Xu, Ji-Hua;Sorba, Lucia;Tredicucci, Alessandro;Biasiol, Giorgio;Ultrafast optical bleaching of intersubband cavity polaritons;PHYSICAL REVIEW B;86;20;201302;10.1103/PhysRevB.86.201302;NOV 28 2012;2012;We report on the transition from the strong to the weak light-matter;coupling regime between an intersubband excitation and a photonic;crystal resonance in a nanostructured semiconductor membrane. Such a;transition is induced by varying the intensity of an ultrafast light;pulse, which is employed for pumping and probing the system eigenmodes.;The phenomenon is interpreted in terms of the saturation of the;intersubband transition due to the large number of photoexcited;electrons in the quantum well, as confirmed by a thorough analysis;performed both in frequency and time domain.;Biasiol, Giorgio/C-5465-2009;Biasiol, Giorgio/0000-0001-7974-5459;5;0;0;0;5;1098-0121;WOS:000311605000002;;;J;Ciric, L.;Sienkiewicz, A.;Gaal, R.;Jacimovic, J.;Vaju, C.;Magrez, A.;Forro, L.;Defects and localization in chemically-derived graphene;PHYSICAL REVIEW B;86;19;195139;10.1103/PhysRevB.86.195139;NOV 27 2012;2012;We have performed electron spin resonance (ESR) measurements on a large;assembly of graphene oxide (GO) and reduced graphene oxide (RGO) flakes.;In GO samples the Curie tail is coming from 1.4 x 10(18) cm(-3) of;localized spins. Although reduction of GO was expected to reestablish;the pristine properties of graphene, no Pauli-like contribution was;detected and only a low concentration of 1.2 x 10(16) cm(-3) spin;carrying defects were measured. Our study, completed by resistivity;measurements, shows that the carrier transport in RGO samples is;dominated by hopping. The incomplete reduction of GO leaves behind a;large number of defects, presumably the majority of which are ESR;silent, causing the Anderson localization of the electronic states.;Slight doping with potassium indicates the appearance of a Pauli;contribution in the spin susceptibility.;Jacimovic, Jacim/C-2674-2013;2;0;0;0;2;1098-0121;WOS:000311537100001;;;J;Dietz, O.;Stoeckmann, H. -J.;Kuhl, U.;Izrailev, F. M.;Makarov, N. M.;Doppler, J.;Libisch, F.;Rotter, S.;Surface scattering and band gaps in rough waveguides and nanowires;PHYSICAL REVIEW B;86;20;201106;10.1103/PhysRevB.86.201106;NOV 27 2012;2012;The boundaries of waveguides and nanowires have drastic influence on;their coherent scattering properties. Designing the boundary profile is;thus a promising approach for transmission and band-gap engineering with;many applications. By performing an experimental study of microwave;transmission through rough waveguides we demonstrate that a recently;proposed surface scattering theory can be employed to predict the;measured transmission properties from the boundary profiles and vice;versa. A new key ingredient of this theory is a scattering mechanism;which depends on the squared gradient of the surface profiles. We;demonstrate the nontrivial effects of this scattering mechanism by;detailed mode-resolved microwave measurements and numerical simulations.;Dietz, Otto/E-9025-2011;4;0;0;0;4;1098-0121;WOS:000311537400001;;;J;Duong, Duc T.;Toney, Michael F.;Salleo, Alberto;Role of confinement and aggregation in charge transport in;semicrystalline polythiophene thin films;PHYSICAL REVIEW B;86;20;205205;10.1103/PhysRevB.86.205205;NOV 27 2012;2012;Crystallite orientations, molecular packing disorder, and hole mobility;of poly(3-hexylthiophene) thin films that are spin casted from different;solvents are studied as a function of film thickness. Grazing incidence;x-ray diffraction reveals that films consist of an ultrathin layer of;ordered, edge-on oriented aggregates and a more disordered, face-on;oriented bulk region. Diffraction and optical absorption spectroscopy;elucidate the film-forming process. Field-effect hole mobility provides;evidence for interconnecting aggregates as the mechanism for efficient;charge transport.;12;1;0;0;12;1098-0121;WOS:000311537400002;;;J;Farrell, David E.;Wolverton, C.;Structure and diffusion in liquid complex hydrides via ab initio;molecular dynamics;PHYSICAL REVIEW B;86;17;174203;10.1103/PhysRevB.86.174203;NOV 27 2012;2012;We have used density functional theory based ab initio molecular;dynamics (AIMD) to study NaAlH4, LiBH4, LiNH2, and Li2BNH6 across a;range of temperatures, above and below the experimental melting;temperature. We have elucidated the structure, vibrational, and;diffusion characteristics of these four materials. We find: (i) In all;cases, the liquid state remains a mixture of the ions found in the solid;state. (ii) The anions remain intact on average but undergo large;deformations across the range of temperatures. (iii) In the case of;LiNH2, there is evidence that the Li+ sublattice melts before the;anionic sublattice. (iv) We find a connection between increased;anion-anion ordering and reduced anion mobility even above the;experimental melting point, due to long range Coulombic interactions;between anions. (v) Finally, we find the liquid has the same major;vibrational modes as the solid, though the lower frequency vibration and;rotation modes become more prominent with increasing temperature.;Wolverton, Christopher/B-7542-2009;1;0;0;0;1;1098-0121;WOS:000311536400001;;;J;Gebhardt, Julian;Vines, Francesc;Goerling, Andreas;Influence of the surface dipole layer and Pauli repulsion on band;energies and doping in graphene adsorbed on metal surfaces;PHYSICAL REVIEW B;86;19;195431;10.1103/PhysRevB.86.195431;NOV 27 2012;2012;The synthesis of single-layer graphene sheets on metal surfaces can be;carried out routinely nowadays. The energetic alignment of the graphene;band structure, including the position of the Dirac point relative to;the Fermi level of the metal, and subsequently, the doping level of the;graphene sheet, depends crucially on the graphene-metal distance and the;specific metal considered. These dependencies are studied with;density-functional theory considering as typical metal surfaces Au(111),;Ni(111), and Au/Ni(111). In the latter case, a single layer of gold is;intercalated between the Ni(111) surface and the graphene sheet. We show;that the energetic positions of eigenstates of helium adsorbed on a;Au(111) surface exhibit a behavior with the adsorption distance;qualitatively comparable to that of bands of physisorbed graphene. In;both cases, the distance dependence of the energy of adsorbate bands can;be explained by the effect of the surface dipole layer on the adsorbate;bands and by electrostatic interactions caused by small charge;rearrangements due to Pauli repulsion between metal surface and;graphene. These charge rearrangements are neither caused by a charge;transfer nor by chemical interactions due to conventional orbital;interaction but have the effect to reduce the overlap of the surface;charge density of the metal with the charge density of the adsorbate.;The latter effect is known as pillow effect from molecules adsorbed on;metal surfaces. Charge transfer between graphene and the metal substrate;does occur but has an opposite effect to the surface dipole layer and;Pauli repulsion, i.e., reduces the effect of the latter. For very large;adsorption distances, this charge transfer vanishes in such a way that;the Dirac point of graphene aligns with the metal Fermi energy. It is;shown that the amount and character of graphene doping can be controlled;by tuning the graphene-metal distance. For a proper description of the;involved electrostatic potentials, a finite-slab correction had to be;applied to them in order to take into account the finite size of the;metal slabs used to model the substrate.;10;0;0;0;10;1098-0121;WOS:000311537100002;;;J;Han, Jae-Ho;Lee, Hyun-Woo;Interlayer exchange coupling between next nearest neighbor layers;PHYSICAL REVIEW B;86;17;174426;10.1103/PhysRevB.86.174426;NOV 27 2012;2012;Interlayer exchange coupling (IEC) between next nearest neighbor;magnetic layers is investigated. For a multilayer system that contains;threemagnetic layers (with magnetization directionsm (m)over-cap(1),;(m)(m)over-cap(2), and (m)(m)over-cap(3), respectively) separated by two;nonmagnetic layers, the angle dependence of the coupling energy and the;thickness dependence of coupling constants were obtained. In addition to;the well known nearest neighbor IEC of the form;-(J)over-tilde(12)(m)over-cap(1) center dot (m)over-cap(2) and;-(J)over-tilde(23)(m)over-cap(2) center dot (m)over-cap(3), we find the;next nearest neighbor IEC of the form -(J);over-tilde(123)((m)over-cap(1) center dot (m)over-cap(2))((m)over-cap(2);center dot (m)over-cap(3)), which is different from the Heisenberg type;next nearest neighbor coupling -J(13)(m)over-cap(1) center dot;(m)over-cap(3). The strength of the next nearest neighbor IEC oscillates;with respect to the thickness of both magnetic and nonmagnetic layers.;The strength of the next nearest neighbor IEC is generally smaller than;the conventional nearest neighbor IEC, but is large enough to allow for;experimental detection.;Lee, Hyun-Woo/B-8995-2008;Lee, Hyun-Woo/0000-0002-1648-8093;1;0;0;0;1;1098-0121;WOS:000311536400003;;;J;Lazo, Cesar;Neel, Nicolas;Kroeger, Joerg;Berndt, Richard;Heinze, Stefan;Tunneling magnetoresistance and exchange interaction in single-atom;contacts;PHYSICAL REVIEW B;86;18;180406;10.1103/PhysRevB.86.180406;NOV 27 2012;2012;The tunneling magnetoresistance of single-atom junctions is shown to;depend on the electrode separation owing to exchange forces and the;resulting geometric relaxations. An analytical model is proposed to;extract relaxations from the magnetoresistances measured with a scanning;tunneling microscope. Exchange forces and relaxations calculated within;density functional theory demonstrate the validity of the model for a;range of distances between tip and sample which extends from tunneling;close to the point of maximal attraction.;3;0;0;0;3;1098-0121;WOS:000311536700001;;;J;Luo, Xin;Sullivan, Michael B.;Quek, Su Ying;First-principles investigations of the atomic, electronic, and;thermoelectric properties of equilibrium and strained Bi2Se3 and Bi2Te3;including van der Waals interactions;PHYSICAL REVIEW B;86;18;184111;10.1103/PhysRevB.86.184111;NOV 27 2012;2012;Bi2Se3 and Bi2Te3 are layered compounds of technological importance,;being excellent thermoelectric materials as well as topological;insulators. We report density functional theory calculations of the;atomic, electronic, and thermoelectric properties of strained bulk and;thin-film Bi2Se3 and Bi2Te3, focusing on an appropriate description of;van der Waals (vdW) interactions. The calculations show that the van der;Waals density functional (vdW-DF) with Cooper's exchange (vdW-DFxC09);can reproduce closely the experimental interlayer distances in;unstrained Bi2Se3 and Bi2Te3. Interestingly, we predict atomic;structures that are in much better agreement with the experimentally;determined structure from Nakajima than that obtained from Wyckoff,;especially for Bi2Se3, where the difference in atomic structures;qualitatively changes the electronic band structure. The band structure;obtained using the Nakajima structure and the vdW-DFxC09 optimized;structure are in much better agreement with previous reports of;photoemission measurements, than that obtained using the Wyckoff;structure. Using vdW-DFxC09 to fully optimize atomic structures of bulk;and thin-film Bi2Se3 and Bi2Te3 under different in-plane and uniaxial;strains, we predict that the electronic bandgap of both the bulk;materials and thin films decreases with tensile in-plane strain and;increases with compressive in-plane strain. We also predict, using the;semiclassical Boltzmann approach, that the magnitude of the n-type;Seebeck coefficient of Bi2Te3 can be increased by the compressive;in-plane strain while that of Bi2Se3 can be increased with tensile;in-plane strain. Further, the in-plane power factor of n-doped Bi2Se3;can be increased with compressive uniaxial strain while that of n-doped;Bi2Te3 can be increased by compressive in-plane strain. Strain;engineering thus provides a direct method to control the electronic and;thermoelectric properties in these thermoelectric topological insulator;materials.;Quek, Su Ying/I-2934-2014;11;0;0;0;11;1098-0121;WOS:000311536700003;;;J;Olejnik, E.;Pandit, B.;Basel, T.;Lafalce, E.;Sheng, C-X.;Zhang, C.;Jiang, X.;Vardeny, Z. V.;Ultrafast optical studies of ordered poly(3-thienylene-vinylene) films;(vol 85, 235201, 2012);PHYSICAL REVIEW B;86;19;199903;10.1103/PhysRevB.86.199903;NOV 27 2012;2012;0;0;0;0;0;1098-0121;WOS:000311537100003;;;J;Qin, Zhen-Xing;Zhang, Chao;Tang, Ling-Yun;Zhong, Guo-Hua;Lin, Hai-Qing;Chen, Xiao-Jia;High-pressure phases of a hydrogen-rich compound: Tetramethylgermane;PHYSICAL REVIEW B;86;18;184110;10.1103/PhysRevB.86.184110;NOV 27 2012;2012;The vibrational and structural properties of a hydrogen-rich group IVa;hydride, Ge(CH3)(4), are studied by combining Raman spectroscopy and;synchrotron x-ray diffraction measurements at room temperature and at;pressures up to 30.2 GPa. Both techniques allow the obtaining of;complementary information on the high-pressure behaviors and yield;consistent phase transitions at 1.4 GPa for the liquid to solid and 3.0,;5.4, and 20.3 GPa for the solid to solid. The four high-pressure solid;phases are identified to have the cubic, orthorhombic, monoclinic, and;monoclinic crystal structures with space groups of Pa-3 for phase I,;Pnma for phase II, P2(1)/c for phase III, and P2(1) for phase IV,;respectively. These transitions are suggested to result from the changes;in the inter- and intramolecular bonding of this compound. The softening;of some Raman modes on CH3 groups and their sudden disappearance;indicate that Ge(CH3)(4) might be an ideal compound to realize;metallization and even high-temperature superconductivity at modest;static pressure for laboratory capability.;Zhong, Guohua/A-8811-2011; Zhang, Chao/E-5109-2010;Zhong, Guohua/0000-0003-0673-8738; Zhang, Chao/0000-0002-5957-2287;3;0;0;0;3;1098-0121;WOS:000311536700002;;;J;Wdowik, U. D.;Koza, M. M.;Chatterji, T.;Phonons in lanthanum manganite: Inelastic neutron scattering and density;functional theory studies;PHYSICAL REVIEW B;86;17;174305;10.1103/PhysRevB.86.174305;NOV 27 2012;2012;Dynamical properties of the lanthanum manganite lattice are examined by;inelastic neutron scattering experiments and density functional theory;calculations. Densities of vibrational states are measured close to the;Jahn-Teller transition temperature of 750 K. Substantial changes;observed in the phonon spectra above the phase transformation are due to;residual orthorhombic distortions that persist in the high-temperature;structure of lanthanum manganite. Results of the present theoretical;investigations supply additional information useful for both Raman and;infrared spectroscopies. In addition, they indicate that typical static;phonon calculations are insufficient to reproduce accurately;experimental magnitudes of these vibrational quantities of lanthanum;manganite that are determined to a large extent by dynamical effects.;0;0;0;0;0;1098-0121;WOS:000311536400002;;;J;Yan, Wei;Wubs, Martijn;Mortensen, N. Asger;Hyperbolic metamaterials: Nonlocal response regularizes broadband;supersingularity;PHYSICAL REVIEW B;86;20;205429;10.1103/PhysRevB.86.205429;NOV 27 2012;2012;We study metamaterials known as hyperbolic media that in the usual;local-response approximation exhibit hyperbolic dispersion and an;associated broadband singularity in the density of states. Instead, from;the more microscopic hydrodynamic Drude theory we derive qualitatively;different optical properties of these metamaterials, due to the;free-electron nonlocal optical response of their metal constituents. We;demonstrate that nonlocal response gives rise to a large-wavevector;cutoff in the dispersion that is inversely proportional to the Fermi;velocity of the electron gas, but also for small wavevectors we find;differences for the hyperbolic dispersion. Moreover, the size of the;unit cell influences effective parameters of the metamaterial even in;the deep subwavelength regime. Finally, instead of the broadband;supersingularity in the local density of states, we predict a large but;finite maximal enhancement proportional to the inverse cube of the Fermi;velocity.;Mortensen, Niels Asger/C-3592-2008; Wubs, Martijn/B-4934-2008;Mortensen, Niels Asger/0000-0001-7936-6264; Wubs,;Martijn/0000-0002-8286-7825;28;3;0;0;28;1098-0121;WOS:000311537400003;;;J;Yoneda, Y.;Kitanaka, Y.;Noguchi, Y.;Miyayama, M.;Electronic and local structures of Mn-doped BiFeO3 crystals;PHYSICAL REVIEW B;86;18;184112;10.1103/PhysRevB.86.184112;NOV 27 2012;2012;The electronic structure of complex oxides is important for;understanding their functional properties. Here, we report the results;of investigating multiferroic BiFeO3 using various x-ray spectroscopy;techniques. Zn- and Mn-codoped and Mn-doped BiFeO3 samples were prepared;with the aim of improving ferroelectric properties of BiFeO3. The;valences of the doped Mn and host Fe were investigated. When oxygen;vacancies exist in the sample, Mn acts as a hole acceptor. Furthermore,;Mn and Fe stabilize the perovskite unit by changing their ionic radius.;As a result, Mn and Fe atoms exhibit various valence states in the;BiFeO3 system. Evidence of the electronic structure for Fe 3d-O 2p-Bi 6s;hybridization is also presented.;2;0;0;0;2;1098-0121;WOS:000311536700004;;;J;Despoja, V.;Mowbray, D. J.;Vlahovic, D.;Marusic, L.;TDDFT study of time-dependent and static screening in graphene;PHYSICAL REVIEW B;86;19;195429;10.1103/PhysRevB.86.195429;NOV 26 2012;2012;Time-dependent density functional theory (TDDFT) within the random phase;approximation (RPA) is used to obtain the time evolution of the induced;potential produce by the sudden formation of a C 1s core hole inside a;graphene monolayer, and to show how the system reaches the equilibrium;potential. The characteristic oscillations in the time-dependent;screening potential are related to the excitations of pi and sigma + pi;plasmons as well as the low energy 2D plasmons in doped graphene. The;equilibrium RPA screened potential is compared with the DFT effective;potential, yielding good qualitative agreement. The self energy of a;point charge near a graphene monolayer is shown to demonstrate an image;potential type behavior, Ze/(z - z(0)), down to very short distances (4;a.u.) above the graphene layer. Both results are found to agree near;quantitatively with the DFT ground state energy shift of a Li+ ion;placed near a graphene monolayer.;Mowbray, Duncan/A-5531-2010; CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Mowbray, Duncan/0000-0002-8520-0364;;4;0;0;0;4;1098-0121;WOS:000311544500013;;;J;Anspoks, A.;Kalinko, A.;Kalendarev, R.;Kuzmin, A.;Atomic structure relaxation in nanocrystalline NiO studied by EXAFS;spectroscopy: Role of nickel vacancies;PHYSICAL REVIEW B;86;17;174114;10.1103/PhysRevB.86.174114;NOV 26 2012;2012;Nanocrystalline NiO samples have been studied using the Ni K-edge;extended x-ray absorption fine structure (EXAFS) spectroscopy and;recently developed modeling technique, combining classical molecular;dynamics with ab initio multiple-scattering EXAFS calculations;(MD-EXAFS). Conventional analysis of the EXAFS signals from the first;two coordination shells of nickel revealed that (i) the second shell;average distance R(Ni-Ni-2) expands in nanocrystalline NiO compared to;microcrystalline NiO, in agreement with overall unit cell volume;expansion observed by x-ray diffraction; (ii) on the contrary, the first;shell average distance R(Ni-O-1) in nanocrystalline NiO shrinks compared;to microcrystalline NiO; (iii) the thermal contribution into the;mean-square relative displacement sigma(2) is close in both;microcrystalline and nanocrystalline NiO and can be described by the;Debye model; (iv) the static disorder is additionally present in;nanocrystalline NiO in both the first Ni-O-1 and second Ni-Ni-2 shells;due to nanocrystal structure relaxation. Within the MD-EXAFS method, the;force-field potential models have been developed for nanosized NiO using;as a criterion the agreement between the experimental and theoretical;EXAFS spectra. The best solutions have been obtained for the 3D;cubic-shaped nanoparticle models with nonzero Ni vacancy concentration;C-vac: C-vac approximate to 0.4-1.2% for NiO nanoparticles having the;cube size of L approximate to 3.6-4.2 nm and C-vac approximate to;1.6-2.0% for NiO thin film composed of cubic nanograins with a size of L;approximate to 1.3-2.1 nm. Thus our results show that the Ni vacancies;in nanosized NiO play important role in its atomic structure relaxation;along with the size reduction effect.;Kuzmin, Alexei/A-2400-2010; Anspoks, Andris/E-8602-2010; Kalinko, Aleksandr/A-3421-2010;Kuzmin, Alexei/0000-0003-4641-6354; Anspoks, Andris/0000-0002-5162-4521;;;8;0;0;0;8;1098-0121;WOS:000311543200002;;;J;Dahlhaus, J. P.;Gibertini, M.;Beenakker, C. W. J.;Scattering theory of topological invariants in nodal superconductors;PHYSICAL REVIEW B;86;17;174520;10.1103/PhysRevB.86.174520;NOV 26 2012;2012;Time-reversal invariant superconductors having nodes of vanishing;excitation gap support zero-energy boundary states with topological;protection. Existing expressions for the topological invariant are given;in terms of the Hamiltonian of an infinite system. We give an;alternative formulation in terms of the Andreev reflection matrix of a;normal-metal-superconductor interface. This allows us to relate the;topological invariant to the angle-resolved Andreev conductance also;when the boundary state in the superconductor has merged with the;continuum of states in the normal metal. A variety of symmetry classes;is obtained, depending on additional unitary symmetries of the;reflection matrix. We derive conditions for the quantization of the;conductance in each symmetry class and test these on a model for a;two-or three-dimensional superconductor with spin-singlet and;spin-triplet pairing, mixed by Rashba spin-orbit interaction.;Beenakker, Carlo/B-7424-2008;Beenakker, Carlo/0000-0003-4748-4412;8;0;0;0;8;1098-0121;WOS:000311543200007;;;J;Ehlers, D.;Tsurkan, V.;von Nidda, H. -A. Krug;Loidl, A.;Intrinsic anomalous magnetic anisotropy of CdCr2S4;PHYSICAL REVIEW B;86;17;174423;10.1103/PhysRevB.86.174423;NOV 26 2012;2012;The magnetocrystalline anisotropy of the ferromagnetic spinel CdCr2S4;was investigated by ferromagnetic resonance measurements. By avoiding;any contact to iron during the sample preparation we can exclude that;the anisotropy is due to ferrous impurities, and by performing;wavelength dispersive electron probe microanalysis as well as annealing;experiments, it is demonstrated that the samples possess almost ideal;stoichiometry. The resonance data suggest that compositional deviations;from the stoichiometry up to 10(-3) have no influence on our conclusion;that the magnetocrystalline anisotropy is an intrinsic property of;CdCr2S4, caused by trigonal distortion of the sulfur octahedra;surrounding the Cr3+ ions. Anomalous low-temperature linewidth maxima in;the < 111 > directions can be understood by considering the crystal;fields acting on inequivalent sites of the magnetic ions in the spinel;structure and by taking into account the effect of exchange narrowing.;5;0;0;0;5;1098-0121;WOS:000311543200004;;;J;Nemec, M.;Foltin, G. R.;Schmidt, K. P.;Microscopic mechanism for the 1/8 magnetization plateau in SrCu2(BO3)(2);PHYSICAL REVIEW B;86;17;174425;10.1103/PhysRevB.86.174425;NOV 26 2012;2012;The frustrated quantum magnet SrCu2(BO3)(2) shows a remarkably rich;phase diagram in an external magnetic field including a sequence of;magnetization plateaux. The by far experimentally most studied and most;prominent magnetization plateau is the 1/8 plateau. Theoretically, one;expects that this material is well described by the Shastry-Sutherland;model. But, recent microscopic calculations indicate that the 1/8;plateau is energetically not favored. Here, we report on a very simple;microscopic mechanism which naturally leads to a 1/8 plateau for;realistic values of the magnetic exchange constants. We show that the;1/8 plateau with a square unit cell benefits most compared to other;plateau structures from quantum fluctuations which, to a large part, are;induced by Dzyaloshinskii-Moriya interactions. Physically, such;couplings result in kinetic terms in an effective hard-core-boson;description leading to a renormalization of the energy of the different;plateau structures which we treat in this work on the mean-field level.;The stability of the resulting plateaux are discussed. Furthermore, our;results indicate a series of stripe structures above 1/8 and a stable;magnetization plateau at 1/6. Most qualitative aspects of our;microscopic theory agree well with a recently formulated;phenomenological theory for the experimental data of SrCu2(BO3)(2).;Interestingly, our calculations point to a rather large ratio of the;magnetic couplings in the Shastry-Sutherland model such that;nonperturbative effects become essential for the understanding of the;frustrated quantum magnet SrCu2(BO3)(2).;Schmidt, Kai /C-7286-2009;5;0;0;0;5;1098-0121;WOS:000311543200006;;;J;Niedziela, Jennifer L.;McGuire, M. A.;Egami, T.;Local structural variation as source of magnetic moment reduction in;BaFe2As2;PHYSICAL REVIEW B;86;17;174113;10.1103/PhysRevB.86.174113;NOV 26 2012;2012;We report time-of-flight neutron powder diffraction results on;stoichiometric BaFe2As2. Pair distribution function analysis shows that;the orthorhombic distortion in the a-b plane at short distances are;significantly different from the average lattice distortion, indicating;local variations in the lattice at short range. We propose that this;local variation reflects a high density of nanotwins, short-ranged;structures which locally affect the magnetic alignment. This result;suggests that the discrepancies between the observed and calculated;magnetic moments in BaFe2As2 arise partly from short-ranged variation of;the lattice in the a-b plane.;McGuire, Michael/B-5453-2009;McGuire, Michael/0000-0003-1762-9406;2;0;0;0;2;1098-0121;WOS:000311543200001;;;J;Ross, K. A.;Proffen, Th.;Dabkowska, H. A.;Quilliam, J. A.;Yaraskavitch, L. R.;Kycia, J. B.;Gaulin, B. D.;Lightly stuffed pyrochlore structure of single-crystalline Yb2Ti2O7;grown by the optical floating zone technique;PHYSICAL REVIEW B;86;17;174424;10.1103/PhysRevB.86.174424;NOV 26 2012;2012;Recent neutron scattering and specific heat studies on the pyrochlore;Yb2Ti2O7 have revealed variations in its magnetic behavior below 265 mK.;In the best samples, a sharp anomaly in the specific heat is observed at;T = 265 mK. Other samples, especially single crystals, have broad;features in the specific heat which vary in sharpness and temperature;depending on the sample, indicating that the magnetic ground statemay be;qualitatively different in such samples. We performed detailed;comparisons of the chemical structure of a pulverized single crystal of;Yb2Ti2O7, grown by the floating zone technique, to a sintered powder;sample of Yb2Ti2O7. Rietveld refinements of neutron powder diffraction;data on these samples reveal that the crushed single crystal is best;described as a "stuffed" pyrochlore, Yb-2(Ti2-xYbx)O7-x/2 with x =;0.046(4), despite perfectly stoichiometric starting material.;Substituting magnetic Yb3+ on the nonmagnetic Ti4+ sublattice would;introduce random exchange bonds and local lattice deformations. These;are expected to be the mechanism leading to the variation of the;delicate magnetic ground state of Yb2Ti2O7. Determination of the cubic;cell length a could be useful as a method for characterizing the;stoichiometry of nonpulverized single crystals at room temperature.;Proffen, Thomas/B-3585-2009; Lujan Center, LANL/G-4896-2012;Proffen, Thomas/0000-0002-1408-6031;;29;2;0;0;29;1098-0121;WOS:000311543200005;;;J;Sims, H.;Butler, W. H.;Richter, M.;Koepernik, K.;Sasioglu, E.;Friedrich, C.;Bluegel, S.;Theoretical investigation into the possibility of very large moments in;Fe16N2;PHYSICAL REVIEW B;86;17;174422;10.1103/PhysRevB.86.174422;NOV 26 2012;2012;We examine the mystery of the disputed high-magnetization alpha;''-Fe16N2 phase, employing the Heyd-Scuseria-Ernzerhof screened hybrid;functional method, perturbative many-body corrections through the GW;approximation, and on-site Coulomb correlations through the generalized;gradient approximation (GGA) + U method. We present a first-principles;computation of the effective on-site Coulomb interaction (Hubbard U);between localized 3d electrons employing the constrained random-phase;approximation (cRPA), finding only somewhat stronger on-site;correlations than in bcc Fe. We find that the hybrid functional method,;the GW approximation, and the GGA + U method (using parameters computed;from cRPA) yield an average spin moment of 2.9 mu(B), 2.6-2.7 mu(B), and;2.7 mu(B) per Fe, respectively.;Sasioglu, Ersoy/H-8697-2013; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Sasioglu, Ersoy/0000-0002-1701-528X; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;0;0;0;7;1098-0121;WOS:000311543200003;;;J;Asahara, Akifumi;Nakajima, Makoto;Fukaya, Ryo;Tokoro, Hiroko;Ohkoshi, Shin-ichi;Suemoto, Tohru;Ultrafast dynamics of reversible photoinduced phase transitions in;rubidium manganese hexacyanoferrate investigated by midinfrared CN;vibration spectroscopy;PHYSICAL REVIEW B;86;19;195138;10.1103/PhysRevB.86.195138;NOV 26 2012;2012;Photoinduced phase switching dynamics between LTP (low-temperature;phase: Fe2+-CN-Mn3+) and PIHTP (photoinduced high-temperature phase:;Fe3+-CN-Mn2+) in rubidium manganese hexacyanoferrate at 4 K was;investigated by visible pump midinfrared probe transient absorption;spectroscopy. By monitoring the CN stretching vibration modes, which are;sensitive to the valence states of the adjacent metal ions, we could;qualify not only LTP and PIHTP but also the phase boundary;configurations (Fe2+-CN-Mn2+ and Fe3+-CN-Mn3+). In addition, by;irradiating with another light inducing the reverse process to the pump;light, we were able to apply a pump-probe measurement to the persistent;phase transitions. The electronic and structural dynamics in the;picosecond region were understood with a phenomenological spectral;fitting model. In particular, in both directions of these phase;transitions, the instantaneous generation of the boundary configuration;was observed. This observation suggests that relatively small domains;and/or low-dimensional fjord-like domains are created at the early stage;of the transition.;1;0;0;0;1;1098-0121;WOS:000311544500006;;;J;Baek, S. -H.;Choi, K. -Y.;Berger, H.;Buechner, B.;Grafe, H. -J.;
7:5:73:7     Finite-Temperature Transition of the Antiferromagnetic Heisenberg Model on a Distorted Kagome Lattice
DOI:10.1103/PhysRevLett.109.057201  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:3  AU: Masuda, Hiroshi;Okubo, Tsuyoshi;Kawamura, Hikaru;
7:5:74:1     Emergence of Room-Temperature Magnetic Ordering in Artificially Fabricated Ordered-Double-Perovskite Sr2FeRuO6
DOI:10.1021/cm200454z  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:9  AU: Chang, Jaewan;Lee, Kyujoon;Jung, Myung Hwa;Kwon, Ji-Hwan;Kim, Miyoung;Kim, Sang-Koog;
7:5:74:2     Structure and magnetic properties of Sr2CoRuO6
DOI:10.1016/j.jmmm.2013.05.054  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Phatak, Rohan;Krishnan, K.;Sali, S. K.;Das, A.;Nigam, A. K.;
7:5:74:3     Diffuse neutron scattering study of magnetic correlations in half-doped La0.5Ca0.5-xSrxMnO3 manganites (x=0.1, 0.3, and 0.4)
DOI:10.1103/PhysRevB.81.104423  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Dhiman, I.;Das, A.;Mittal, R.;Su, Y.;Kumar, A.;Radulescu, A.;
7:5:74:4     The effects of thermal treatment on the physical properties of Sr2FeMo1-xMxO6 perovskite with M = W, Ta and x <= 0.3
DOI:10.1016/j.jallcom.2010.08.126  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Burzo, E.;Balasz, I.;Valeanu, M.;Pop, I. G.;
7:5:74:5     The dielectric response of La0.5Ca0.5-xSrxMnO3 (0.1 <= x <= 0.4) manganites with different magnetic ground states
DOI:10.1063/1.3501045  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Dhiman, Indu;Deshpande, S. K.;Das, A.;
7:5:74:6     Layer-by-layer growth of SrFeO3-delta thin films on atomically flat single-terminated SrRuO3/SrTiO3 (111) surfaces
DOI:10.1016/j.jcrysgro.2009.12.004  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:3  AU: Chang, Jaewan;Lee, Jong-Woo;Kim, Sang-Koog;
7:5:74:7     Physical properties of La1-xPbxMnO3 perovskites with 0.24 <= x <= 0.40
DOI:10.1016/j.jallcom.2012.04.080  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:1  AU: Burzo, E.;Balasz, I.;Isobe, M.;Ueda, Y.;
7:5:74:8     Structural, electronic and magnetic properties of a symmetrical Fe ReO terminated (001)-oriented slab of double perovskite Sr2FeReO6
DOI:10.1016/j.matchemphys.2012.07.028  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:0  AU: Zhang, Yan;Ji, Vincent;Xu, Ke-Wei;
7:5:74:9     The structural, electronic and magnetic properties of a symmetrical FeMoO terminated (001)-oriented slab of double perovskite Sr2FeMoO6
DOI:10.1016/j.tsf.2012.04.069  JN:THIN SOLID FILMS  PY:2012
  TC:0  AU: Zhang, Yan;Ji, Vincent;Xu, Ke-Wei;
7:5:75:1     Ferromagnetic Y2CoMnO6: Spin-Glass-Like Behavior and Dielectric Relaxation
DOI:10.1007/s11664-014-2981-0  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:4  AU: Zhang, Chao;Wang, Xiaofei;Yan, Haitao;Kang, Dawei;Li, Liben;Lu, Xiaomei;Han, Daofu;Yan, Feng;Zhu, Jinsong;
7:5:75:2     Dielectric relaxation in Tb0.5Y0.5MnO3 ceramics
DOI:10.1016/j.matlet.2014.06.119  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Zhang, Chao;Wang, Xiaofei;Kang, Dawei;Lei, Jianfei;Li, Liben;Lu, Xiaomei;Zhu, Jinsong;
7:5:75:3     Synthesis of TbMnO3 nanoparticles via a polyacrylamide gel route
DOI:10.1016/j.apt.2010.12.002  JN:ADVANCED POWDER TECHNOLOGY  PY:2012
  TC:9  AU: Lin, G. J.;Yang, H.;Xian, T.;Wei, Z. Q.;Jiang, J. L.;Feng, W. J.;
7:5:75:4     Effect of A-site Bi-doping on the magnetic and electrical properties in TbMnO3
DOI:10.1016/j.matlet.2013.08.068  JN:MATERIALS LETTERS  PY:2013
  TC:2  AU: Zhang, Chao;Yan, Haitao;Wang, Xiaofei;Kang, Dawei;Li, Liben;Lu, Xiaomei;Zhu, Jinsong;
7:5:75:5     Structure and current-induced effect on the resistivity of La2CoMnO6 thin films
DOI:10.1016/j.matchemphys.2011.11.054  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:2  AU: Gu, Yijing;Wang, Yunfeng;Wang, Tao;Shi, Wangzhou;
7:5:75:6     Microwave sintering, characterization and magnetic properties of double perovskite La2CoMnO6 nanoparticles
DOI:10.1016/j.matlet.2014.06.057  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Reddy, M. Penchal;Zhou, X. B.;Jing, L.;Huang, Q.;
7:5:75:7     Facile and rapid synthesis of multiferroic TbMnO3 single crystalline
DOI:10.1016/j.materresbull.2013.05.060  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:2  AU: An, Xiaoxin;Deng, Jinxia;Chen, Jun;Xing, Xianran;
7:5:75:8     Magnetic properties of CuCrZrSe4
DOI:10.1016/j.jmmm.2012.12.006  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Belakroum, Karima;Ouili, Zeineddine;Leblanc-Soreau, Annie;Hemmida, Mamoun;von Nidda, Hans-Albrecht Krug;
7:5:76:1     Magnetic Excitations in the Low-Temperature Ferroelectric Phase of Multiferroic YMn2O5 Using Inelastic Neutron Scattering
DOI:10.1103/PhysRevLett.107.097401  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:11  AU: Kim, J. -H.;van der Vegte, M. A.;Scaramucci, A.;Artyukhin, S.;Chung, J. -H.;Park, S.;Cheong, S-W.;Mostovoy, M.;Lee, S. -H.;
7:5:76:2     Temperature evolution of the magnetic structure of TbMn2O5
DOI:10.1103/PhysRevB.84.224422  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Wilkinson, C.;Brown, P. J.;Chatterji, T.;
7:5:76:3     Control of magnetic interaction and ferroelectricity by nonmagnetic Ga substitution in multiferroic YMn2O5
DOI:10.1103/PhysRevB.87.104414  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Kimura, H.;Sakamoto, Y.;Fukunaga, M.;Hiraka, H.;Noda, Y.;
7:5:76:4     Investigation of the electromagnon excitations in the multiferroic TbMn2O5
DOI:10.1103/PhysRevB.87.140301  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Petit, S.;Baledent, V.;Doubrovsky, C.;Lepetit, M. B.;Greenblatt, M.;Wanklyn, B.;Foury-Leylekian, P.;
7:5:76:5     Magnetic phase transitions in PrMn2O5: Importance of ion-size threshold size effects in RMn2O5 compounds (R = rare earth)
DOI:10.1103/PhysRevB.86.174417  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Doubrovsky, C.;Andre, G.;Gukasov, A.;Auban-Senzier, P.;Pasquier, C. R.;Elkaim, E.;Li, M.;Greenblatt, M.;Damay, F.;Foury-Leylekian, P.;
7:5:76:6     Understanding neutron scattering data in YMn2O5: An effective spin Hamiltonian
DOI:10.1103/PhysRevB.84.054444  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Baidya, Santu;Sanyal, Prabuddha;Das, Hena;Roessli, Bertrand;Chatterji, Tapan;Saha-Dasgupta, T.;
7:5:76:7     Role of magnetic chirality in polarization flip upon a commensurate-incommensurate magnetic phase transition in YMn2O5
DOI:10.1103/PhysRevB.88.140403  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Wakimoto, Shuichi;Kimura, Hiroyuki;Sakamoto, Yuma;Fukunaga, Mamoru;Noda, Yukio;Takeda, Masayasu;Kakurai, Kazuhisa;
7:5:76:8     Spectral origin of the colossal magnetodielectric effect in multiferroic DyMn2O5
DOI:10.1103/PhysRevB.90.054417  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Sushkov, A. B.;Kant, Ch;Schiebl, M.;Shuvaev, A. M.;Pimenov, Anna;Pimenov, Andrei;Lorenz, Bernd;Park, S.;Cheong, S-W.;Mostovoy, Maxim;Drew, H. D.;
7:5:76:9     Field dependence of the magnetic structure of TbMn2O5
DOI:10.1063/1.4902840  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chatterji, T.;Brown, P. J.;
7:5:77:1     Structural and Mossbauer study of the Brownmillerite oxides LaSrMn2-xFexO5 (0 <= x <= 0.5)
DOI:10.1016/j.jallcom.2013.06.130  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Mohamed, M.;Rammeh, N.;Kabadou, A.;Sougrati, M. T.;van der Lee, A.;
7:5:77:2     Oxygen nonstoichiometry, chemical expansion, mixed conductivity, and anodic behavior of Mo-substituted Sr3Fe2O7-delta
DOI:10.1016/j.ssi.2010.06.004  JN:SOLID STATE IONICS  PY:2010
  TC:8  AU: Kharton, V. V.;Patrakeev, M. V.;Tsipis, E. V.;Avdeev, M.;Naumovich, E. N.;Anikina, P. V.;Waerenborgh, J. C.;
7:5:77:3     Thermal Expansion of Alkaline-Doped Lanthanum Ferrite Near the Neel Temperature
DOI:10.1111/jace.12625  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Beausoleil, Geoffrey L., II;Price, Patrick;Thomsen, David;Punnoose, Alex;Ubic, Rick;Misture, Scott;Butt, Darryl P.;
7:5:77:4     Systematic Study of Compositional and Synthetic Control of Vacancy and Magnetic Ordering in Oxygen-Deficient Perovskites Ca2Fe2-xMnxO5+y and CaSrFe2-xMnxO5+y (x=1/2, 2/3, and 1; y=0-1/2)
DOI:10.1021/ja210985t  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:6  AU: Ramezanipour, Farshid;Greedan, John E.;Cranswick, Lachlan M. D.;Garlea, V. Ovidiu;Donaberger, Ronald L.;Siewenie, Joan;
7:5:77:5     Investigation of local structure effect and X-ray absorption characteristics (EXAFS) of Fe (Ti) K-edge on photocatalyst properties of SrTi(1-x)FexO(3-delta)
DOI:10.1016/j.matchemphys.2012.06.037  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:12  AU: Ghaffari, M.;Liu, T.;Huang, H.;Tan, O. K.;Shannon, M.;
7:5:77:6     Redox behavior and transport properties of brownmillerite Ca-2(Fe,M)(2)O-5 +/-delta (M = Mn, Co)
DOI:10.1016/j.ssi.2011.11.016  JN:SOLID STATE IONICS  PY:2012
  TC:1  AU: Shaula, A. L.;Markov, A. A.;Naumovich, E. N.;Waerenborgh, J. C.;Pivak, Y. V.;Kharton, V. V.;
7:5:77:7     Comment on "Structural and Mossbauer study of the brownmillerite oxides LaSrMn2-xFexO5 (0 <= x <= 0.5)"
DOI:10.1016/j.jallcom.2014.04.218  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Auckett, Josie E.;Ling, Chris D.;
7:5:77:8     Structural and Thermoelectric Properties of Rare-Earth-Substituted Sr3Fe2O7
DOI:10.2320/matertrans.E-M2013821  JN:MATERIALS TRANSACTIONS  PY:2013
  TC:0  AU: Kakemoto, Hirofumi;Ishikawa, Masahiko;Yazaki, Jiyo;Irie, Hiroshi;
7:5:77:9     Structure and transport properties of La0.5Sr0.5 (-) xCaxFeO3 (-) (delta)
DOI:10.1016/j.ssi.2013.11.050  JN:SOLID STATE IONICS  PY:2014
  TC:0  AU: Chesnokov, K. Yu.;Markov, A. A.;Patrakeev, M. V.;Leonidov, I. A.;Murzakaev, A. M.;Leonidova, O. N.;Shalaeva, E. V.;Kharton, V. V.;Kozhevnikov, V. L.;
7:5:78:1     High-quality single crystal growth and spin flop of multiferroic Co4Nb2O9
DOI:10.1016/j.jcrysgro.2015.03.045  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Cao, Yiming;Yang, Yali;Xiang, Maolin;Feng, Zhenjie;Kang, Baojuan;Zhang, Jincang;Ren, Wei;Cao, Shixun;
7:5:78:2     Spin-flop driven magneto-dielectric effect in Co4Nb2O9
DOI:10.1063/1.3645017  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Kolodiazhnyi, T.;Sakurai, H.;Vittayakorn, N.;
7:5:78:3     Anisotropic magnetodielectric coupling behavior of Ca3Co1.4Rh0.6O6 due to geometrically frustrated magnetism
DOI:10.1063/1.4895699  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Basu, Tathamay;Iyer, Kartik K.;Singh, Kiran;Mukherjee, K.;Paulose, P. L.;Sampathkumaran, E. V.;
7:5:78:4     Growth and surface morphology of ErFeO3 single crystal
DOI:10.1016/j.jcrysgro.2010.11.119  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:4  AU: Chang, Fenfen;Yuan, Shujuan;Wang, Yabin;Zhan, Sheng;Cao, Shixun;Wu, Anhua;Xu, Jun;
7:5:78:5     Magnetic properties of the (CoxMn1-x)(4)Nb2O9 solid solution series
DOI:10.1016/j.jmmm.2009.10.008  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Schwarz, B.;Kraft, D.;Theissmann, R.;Ehrenberg, H.;
7:5:79:1     Substitution Effect on the Interplane Coupling in Crednerite: the Cu1.04Mn0.96O2 Case
DOI:10.1021/cm102483m  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:9  AU: Poienar, M.;Vecchini, C.;Andre, G.;Daoud-Aladine, A.;Margiolaki, I.;Maignan, A.;Lappas, A.;Chapon, L.;Hervieu, M.;Damay, F.;Martin, C.;
7:5:79:2     Tuning the magnetic ground state of a triangular lattice system Cu(Mn1-xCux)O-2
DOI:10.1103/PhysRevB.83.172407  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Garlea, V. Ovidiu;Savici, Andrei T.;Jin, Rongying;
7:5:79:3     Magnetoelastic coupling in the frustrated antiferromagnetic triangular lattice CuMnO2
DOI:10.1103/PhysRevB.82.094404  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Vecchini, C.;Poienar, M.;Damay, F.;Adamopoulos, O.;Daoud-Aladine, A.;Lappas, A.;Perez-Mato, J. M.;Chapon, L. C.;Martin, C.;
7:5:79:4     Orbital structure and magnetic ordering in stoichiometric and doped crednerite CuMnO2
DOI:10.1103/PhysRevB.89.024406  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Ushakov, A. V.;Streltsov, S. V.;Khomskii, D. I.;
7:5:79:5     Magnetic correlations and the influence of atomic disorder in frustrated isosceles triangular lattice antiferromagnet CuMnO2
DOI:10.1103/PhysRevB.84.064432  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Terada, Noriki;Tsuchiya, Yoshinori;Kitazawa, Hideaki;Osakabe, Toyotaka;Metoki, Naoto;Igawa, Naoki;
7:5:80:1     Effect of strontium ion doping on structural, thermal, morphological and electrical properties of a co-doped lanthanum manganite system
DOI:10.1016/j.jallcom.2009.10.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Gupta, Ravindra K.;Kim, Eun Yi;Kim, Yoo Hang;Whang, Chin Myung;
7:5:80:2     Structural and impedance analysis of copper doped LSM cathode for IT-SOFCs
DOI:10.1016/j.jallcom.2013.01.002  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Noh, Taimin;Ryu, Jiseung;Kim, Jinseong;Kim, Yong-Nam;Lee, Heesoo;
7:5:80:3     Structural analysis and electrochemical properties of cobalt-doped Sr0.9Ce0.1MnO3-delta cathode for IT-SOFCs
DOI:10.1557/jmr.2014.306  JN:JOURNAL OF MATERIALS RESEARCH  PY:2014
  TC:0  AU: Ryu, Jiseung;O'Hayre, Ryan;Lee, Heesoo;
7:5:80:4     Strain effect on the electrical conductivity of epitaxial La0.67Sr0.33MnO3 thin films
DOI:10.1016/j.scriptamat.2011.03.021  JN:SCRIPTA MATERIALIA  PY:2011
  TC:1  AU: Yang, Fan;Kim, Sangtae;Takamura, Yayoi;
7:5:80:5     Effect of Cu doping on the electrochemical properties and structural phases of La0.8Sr0.2Mn1- xCuxO3 (0 <= x <= 0.2) at elevated temperature
DOI:10.1016/j.ssi.2014.03.012  JN:SOLID STATE IONICS  PY:2014
  TC:0  AU: Noh, Taimin;Ryu, Jiseung;O'Hayre, Ryan;Lee, Heesoo;
7:5:80:6     Polarization resistance and composite cathode of Ce doped SrMnO3 system for intermediate temperature solid oxide fuel cells
DOI:10.1016/j.ssi.2014.03.017  JN:SOLID STATE IONICS  PY:2014
  TC:2  AU: Ryu, Jiseung;O'Hayre, Ryan;Lee, Heesoo;
7:5:80:7     Local structure and polarization resistance of Ce doped SrMnO3 using extended x-ray fine structure analysis
DOI:10.1063/1.4896107  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ryu, Jiseung;Lee, Heesoo;
7:5:80:8     Electrochemical properties of Sr1-xCexMnO3 (0.1 <= x <= 0.4) - GDC composite cathodes for IT-SOFCs
DOI:10.1016/j.ceramint.2013.09.099  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Noh, Taimin;Ryu, Jiseung;Lee, Heesoo;Kim, Yong-Nam;Jeong, Cheolweon;Van Tyne, Chester J.;
7:5:80:9     Chemical compatibility and electrical contact between Ni-Cr-Mo alloy and LaCo0.6Ni0.4O3-delta in intermediate temperature solid oxide fuel cells
DOI:10.1016/j.ijhydene.2012.08.135  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2012
  TC:2  AU: Zhang, Wenying;Wang, Fangzhong;Wang, Kaishi;Pu, Jian;Chi, Bo;Jian, Li;
7:5:81:1     Electric and magnetic polarizabilities of hexagonal Ln(2)CuTiO(6)(Ln = Y, Dy, Ho, Er, and Yb)
DOI:10.1103/PhysRevB.82.134203  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Choudhury, Debraj;Hazarika, Abhijit;Venimadhav, Adyam;Kakarla, Chandrasekhar;Delaney, Kris T.;Devi, Sujatha;Mondal, P.;Nirmala, R.;Gopalakrishnan, J.;Spaldin, Nicola A.;Waghmare, Umesh V.;Sarma, D. D.;
7:5:81:2     Robust dielectric properties of B-site size-disordered hexagonal Ln(2)CuTiO(6) (Ln = Y, Dy, Ho, Er, and Yb)
DOI:10.1116/1.4868112  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2014
  TC:0  AU: Choudhury, D.;Sarma, D. D.;
7:5:81:3     Synthesis and properties of solid solutions of hexagonal YCu0.5Ti0.5O3 with YMO3 (M = Mn, Cr, Fe, Al, Ga, and In)
DOI:10.1016/j.materresbull.2010.10.006  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:7  AU: Smith, Andrew E.;Sleight, Arthur W.;Subramanian, M. A.;
7:5:81:4     Topotactic reduction and reoxidation of hexagonal RCu0.5Ti0.5O3 (R = Y, Eu-Lu) Phases
DOI:10.1016/j.materresbull.2013.02.058  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:2  AU: Jiang, Peng;Berthelot, Romain;Li, Jun;Sleight, A. W.;Subramanian, M. A.;
7:5:81:5     Unusual dielectric response in B-site size-disordered hexagonal transition metal oxides
DOI:10.1063/1.3379293  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Choudhury, Debraj;Venimadhav, Adyam;Kakarla, Chandrasekhar;Delaney, Kris T.;Devi, P. Sujatha;Mondal, P.;Nirmala, R.;Gopalakrishnan, J.;Spaldin, Nicola A.;Waghmare, Umesh V.;Sarma, D. D.;
7:5:81:6     Co-substitution at the Mn-site in YMnO3: Structural stability and physical properties
DOI:10.1016/j.materresbull.2012.01.015  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:1  AU: Malo, S.;Maignan, A.;
7:5:82:1     A theoretical model for anisotropic multiferroics
DOI:10.1063/1.4822106  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Wang, Shuling;Li, Ruixue;Fu, Hua-Hua;Ding, Linjie;Gao, G. Y.;Yao, Kailun;
7:5:82:2     Approach to control polarization and magnetic properties for multiferroics with Dzyaloshinskii-Moriya interaction
DOI:10.1063/1.4886181  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Wang, Shuling;Li, Ruixue;Fu, Hua-Hua;Ding, Linjie;Yao, Kailun;
7:5:82:3     Spin-lattice coupling driven ferroelectric transition in one-dimensional organic quantum magnets
DOI:10.1039/c0jm02025g  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:4  AU: Ding, L. J.;Yao, K. L.;Fu, H. H.;
7:5:82:4     Unraveling the polar state in TMTTF2-PF6 organic crystals
DOI:10.1103/PhysRevB.85.205146  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Giovannetti, Gianluca;Kumar, Sanjeev;Pouget, Jean-Paul;Capone, Massimo;
7:5:82:5     The influence of magnetic anisotropy on magnetoelectric behavior in conical spin ordered multiferroic state
DOI:10.1063/1.3407541  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Yao, Xiaoyan;Lo, Veng Cheong;Liu, Jun-Ming;
7:5:83:1     Preparation, structural, dielectric and magnetic properties of LaFeO3-PbTiO3 solid solutions
DOI:10.1016/j.materresbull.2012.08.003  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:5  AU: Ivanov, S. A.;Tellgren, R.;Porcher, F.;Ericsson, T.;Mosunov, A.;Beran, P.;Korchagina, S. K.;Kumar, P. Anil;Mathieu, R.;Nordblad, P.;
7:5:83:2     Novel multiferroic La0.95Sb0.05FeO3 orthoferrite
DOI:10.1016/j.matchemphys.2011.03.033  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:4  AU: Ahmed, M. A.;Selim, M. Solyman;Arman, M. M.;
7:5:83:3     Nonstoichiometry, defects and thermodynamic properties of YFeO3, YFe2O4 and Y3Fe5O12
DOI:10.1016/j.ssi.2012.07.003  JN:SOLID STATE IONICS  PY:2012
  TC:6  AU: Jacob, K. T.;Rajitha, G.;
7:5:83:4     Thermodynamic properties of LaFeO3-delta and LaFe12O19
DOI:10.1016/j.mseb.2011.01.012  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:3  AU: Jacob, K. T.;Ranjani, R.;
7:5:83:5     Investigation of structural, optical and magnetic properties in PbTi1-xFexO3 ceramics
DOI:10.1016/j.ceramint.2011.06.017  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:1  AU: Nguyen Van Minh;Le Mai Oanh;Pham Van Doan;Pham Van Hai;Luc Huy Hoang;
7:5:84:1     Local distortion in Co-doped LSMO from entropy-maximized charge density distribution
DOI:10.1016/j.jallcom.2010.04.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Ali, K. S. Syed;Saravanan, R.;Pashchenko, A. V.;Pashchenko, V. P.;
7:5:84:2     Magnetic phases in lanthanum-strontium manganite-cobaltite La1.25Sr0.75MnCoO6
DOI:10.1016/j.jmmm.2009.10.003  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:5  AU: Bazuev, G. V.;Korolyov, A. V.;Melkozyorova, M. A.;Chupakhina, T. I.;
7:5:84:3     Effect of Mn-Site for Al Substitution on Structural, Electrical and Magnetic Properties in La0.67Sr0.33Mn1-xAlxO3 Thin Films by Sol-Gel Method
DOI:10.1155/2014/703072  JN:JOURNAL OF NANOMATERIALS  PY:2014
  TC:0  AU: Abdullah, H.;Zulfakar, M. Syafiq;Chen, S. Kien;
7:5:84:4     La0.6Sr0.4MnO3 particles synthesized under an external magnetic field
DOI:10.1016/j.matlet.2011.12.024  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Fu, Yankun;Zi, Zhenfa;Liu, Qiangchun;Cheng, Yulan;Dai, Jianming;
7:5:84:5     Observation of mixed-phase behavior in the Mn-doped cobaltite La0.7Sr0.3Co1-xMnxO3 (x=0-0.5)
DOI:10.1016/j.jmmm.2009.10.054  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:3  AU: Bau, L. V.;Khiem, N. V.;Phuc, N. X.;Hong, L. V.;Nam, D. N. H.;Nordblad, P.;
7:5:84:6     Structure, phase transitions, Mn-55 NMR, Fe-57 Mossbauer studies and magnetoresistive properties of La0.6Sr0.3Mn1.1-xFexO3
DOI:10.1016/j.jmmm.2014.06.009  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Pashchenko, A. V.;Pashchenko, V. P.;Revenko, Yu. F.;Prokopenko, V. K.;Shemyakov, A. A.;Levchenko, G. G.;Pismenova, N. E.;Kitaev, V. V.;Gufan, Yu. M.;Sil'cheva, A. G.;Dyakonov, V. P.;
7:5:84:7     Structural and Surface Morphology Studies of La0.67Ba0.33(Mn1-xAlx)O-3 Thin Films Prepared by Sol-Gel Method
DOI:10.1155/2013/412741  JN:JOURNAL OF NANOMATERIALS  PY:2013
  TC:0  AU: Abdullah, H.;Zulfakar, M. S.;
7:5:85:1     Magnetoelectric effect in NdCrTiO5
DOI:10.1103/PhysRevB.85.024415  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Hwang, J.;Choi, E. S.;Zhou, H. D.;Lu, J.;Schlottmann, P.;
7:5:85:2     Magnetic transitions and magnetodielectric effect in antiferromagnet SrNdFeO4
DOI:10.1103/PhysRevB.85.224429  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Hwang, J.;Choi, E. S.;Zhou, H. D.;Xin, Y.;Lu, J.;Schlottmann, P.;
7:5:85:3     Interplay between low dimensionality and magnetic frustration in the magnetoelectric pyroxenes LiCrX2O6 (X=Ge, Si)
DOI:10.1103/PhysRevB.82.024429  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Nenert, Gwilherm;Isobe, Masahiko;Kim, Ingyu;Ritter, Clemens;Colin, Claire V.;Vasiliev, Alexander N.;Kim, Kee Hoon;Ueda, Yutaka;
7:5:85:4     Magnetic and magnetoelectric study of the pyroxene NaCrSi2O6
DOI:10.1103/PhysRevB.81.184408  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Nenert, Gwilherm;Kim, Ingyu;Isobe, Masahiko;Ritter, Clemens;Vasiliev, Alexander N.;Kim, Kee Hoon;Ueda, Yutaka;
7:5:86:1     Raman and x-ray photoelectron spectroscopy study of ferroelectric switching in Pb(Nb,Zr,Ti)O-3 thin films
DOI:10.1063/1.3675479  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Ramos-Moore, E.;Ferrari, P.;Diaz-Droguett, D. E.;Lederman, D.;Evans, J. T.;
7:5:86:2     Generation of oxygen vacancies in the surface of ferroelectric Pb(Nb,Zr,Ti)O-3
DOI:10.1016/j.apsusc.2010.12.124  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:6  AU: Ramos-Moore, E.;Diaz-Droguett, D. E.;Spring, P.;Evans, T.;Cabrera, A. L.;
7:5:86:3     Effects of Sr2+ ion-doped on the microstructure and photoluminescence properties of Ca2La0.97Pr0.03TaO6 phosphor
DOI:10.1016/j.jallcom.2013.05.217  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Tsai, Yeou-Yih;Tsai, Mu-Tsun;Lin, Huang-Zuo;Chang, Yee-Shin;
7:5:86:4     Electron-pinned defect-dipoles for high-performance colossal permittivity materials
DOI:10.1038/NMAT3691  JN:NATURE MATERIALS  PY:2013
  TC:36  AU: Hu, Wanbiao;Liu, Yun;Withers, Ray L.;Frankcombe, Terry J.;Noren, Lasse;Snashall, Amanda;Kitchin, Melanie;Smith, Paul;Gong, Bill;Chen, Hua;Schiemer, Jason;Brink, Frank;Wong-Leung, Jennifer;
7:5:86:5     Raman analysis of ferroelectric switching in niobium-doped lead zirconate titanate thin films
DOI:10.1016/j.tsf.2014.02.050  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Ferrari, P.;Ramos-Moore, E.;Guitar, M. A.;Cabrera, A. L.;
7:5:86:6     Modification of ferroelectric hysteresis in Pb(Nb,Zr,Ti)O-3 thin films induced by CO2 adsorption
DOI:10.1016/j.apsusc.2011.09.067  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:3  AU: Ramos-Moore, E.;Lederman, D.;Cabrera, A. L.;
7:5:87:1     Spin-canting in lightly electron-doped CaMnO3
DOI:10.1103/PhysRevB.85.165128  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Ohnishi, Hiromasa;Kosugi, Taichi;Miyake, Takashi;Ishibashi, Shoji;Terakura, Kiyoyuki;
7:5:87:2     Magnetic and transport properties of electron-doped Ca3-x BixMn2O7
DOI:10.1007/s00339-013-7991-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Chang, Hong;Wu, Qiang;
7:5:87:3     Nature of short-range order in the paramagnetic state of manganites
DOI:10.1016/j.jallcom.2013.03.045  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Ramirez, Fabian E. N.;Francisquini, Elton;Souza, Jose Antonio;
7:5:87:4     Interface Control of Emergent Ferroic Order in Ruddlesden-Popper Srn+1TinO3n+1 (vol 107, 257602, 2011)
DOI:10.1103/PhysRevLett.108.029901  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:1  AU: Birol, Turan;Benedek, Nicole A.;Fennie, Craig J.;
7:5:87:5     Colossal magnetoresistance accompanied with magnetorelaxor behavior in phase-separated Ca(1-x)Ce(x)MnO(3) thin films and CaMnO(3)/Ca(0.92)Ce(0.08)MnO(3) superlattices
DOI:10.1063/1.3353901  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Xiang, P. -H.;Yamada, H.;Sawa, A.;Akoh, H.;
7:5:88:1     Magnetoelectric MnPS3 as a candidate for ferrotoroidicity
DOI:10.1103/PhysRevB.82.100408  JN:PHYSICAL REVIEW B  PY:2010
  TC:15  AU: Ressouche, E.;Loire, M.;Simonet, V.;Ballou, R.;Stunault, A.;Wildes, A.;
7:5:88:2     Controlling toroidal moments by crossed electric and magnetic fields
DOI:10.1103/PhysRevB.88.024414  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Baum, M.;Schmalzl, K.;Steffens, P.;Hiess, A.;Regnault, L. P.;Meven, M.;Becker, P.;Bohaty, L.;Braden, M.;
7:5:88:3     Dielectric Investigations of Layered Mn2P2S6 and Cu0.52Mn1.74P2S6 Single Crystals
DOI:10.1080/00150193.2013.821871  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Dziaugys, A.;Banys, J.;Vysochanskii, Yu;
7:5:88:4     Magnetic structure and glassiness in Fe0.5Ni0.5PS3
DOI:10.1016/j.jmmm.2013.01.023  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Goossens, D. J.;Brazier-Hollins, S.;James, D. R.;Hutchison, W. D.;Hester, J. R.;
7:5:89:1     Controlling independently the electric and thermal properties by shrinking the particle size down to nanosize in quasi-one-dimensional Ca3Co2O6 and Sr6Co5O15
DOI:10.1103/PhysRevB.82.085110  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Takami, Tsuyoshi;Horibe, Munehisa;Itoh, Masayuki;Cheng, Jinguang;
7:5:89:2     Synthesis of fine particles of a geometrically frustrated spin-chain system Ca3Co2O6 through a pyrophoric route and its magnetic behavior
DOI:10.1016/j.jallcom.2010.03.108  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Mukherjee, K.;Sampathkumaran, E. V.;
7:5:89:3     Controlling independently the electric and thermal properties by shrinking the particle size down to nanosize in quasi-one-dimensional Ca3Co2O6 and Sr6Co5O15 (vol 82, 085110, 2010)
DOI:10.1103/PhysRevB.83.079903  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Takami, Tsuyoshi;Horibe, Munehisa;Itoh, Masayuki;Cheng, Jinguang;
7:5:89:4     Electronic structure analysis of the quasi-one-dimensional oxide Sr6Co5O15 within the LDA plus U method
DOI:10.1063/1.3536796  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Botana, A. S.;Botta, P. M.;de la Calle, C.;Pineiro, A.;Pardo, V.;Botana, J.;Pereiro, M.;Baldomir, D.;Alonso, J. A.;Arias, J. E.;
7:5:90:1     Annealing effect on the structural and optical properties of Cr/alpha-Cr2O3 monodispersed particles based solar absorbers
DOI:10.1016/j.apsusc.2012.11.099  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:8  AU: Khamlich, S.;McCrindle, R.;Nuru, Z. Y.;Cingo, N.;Maaza, M.;
7:5:90:2     Femtosecond laser surface structuring and oxidation of chromium thin coatings: Black chromium
DOI:10.1016/j.apsusc.2014.09.168  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Kotsedi, L.;Nuru, Z. Y.;Mthunzi, P.;Muller, T. F. G.;Eaton, S. M.;Julies, B.;Manikandan, E.;Ramponi, R.;Maaza, M.;
7:5:90:3     Structural, mechanical and tribological characterization of chromium oxide thin films prepared by post-annealing of Cr thin films
DOI:10.1016/j.apsusc.2013.07.123  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: Khojier, K.;Savaloni, H.;Ashkabusi, Z.;Dehnavi, N. Z.;
7:5:90:4     The use of trivalent chromium bath to obtain a solar selective black chromium coating
DOI:10.1016/j.apsusc.2014.03.122  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Surviliene, S.;Cesuniene, A.;Juskenas, R.;Selskiene, A.;Bucinskiene, D.;Kalinauskas, P.;Juskevicius, K.;Jureviciute, I.;
7:5:90:5     Valency control in MoO3-delta nanoparticles generated by pulsed laser liquid solid interaction
DOI:10.1007/s11051-011-0714-3  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2012
  TC:2  AU: Maaza, M.;Ngom, B. D.;Khamlich, S.;Kana, J. B. Kana;Sibuyi, P.;Hamidi, D.;Ekambaram, S.;
7:5:91:1     First-principles study of structural, electronic, and magnetic properties of double perovskite Ho2MnFeO6
DOI:10.1103/PhysRevB.82.224413  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Zhang, J. T.;Lu, X. M.;Zhou, J.;Su, J.;Min, K. L.;Huang, F. Z.;Zhu, J. S.;
7:5:91:2     Spin-Spiral States in Undoped Manganites: Role of Finite Hund's Rule Coupling
DOI:10.1103/PhysRevLett.104.017201  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:8  AU: Kumar, Sanjeev;van den Brink, Jeroen;Kampf, Arno P.;
7:5:91:3     Spin-Spiral States in Undoped Manganites: Role of Finite Hund's Rule Coupling (vol 104, 017201, 2010)
DOI:10.1103/PhysRevLett.104.129902  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:0  AU: Kumar, Sanjeev;van den Brink, Jeroen;Kampf, Arno P.;
7:5:92:1     Crystallization of an exciton superfluid
DOI:10.1103/PhysRevB.84.075130  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Boening, J.;Filinov, A.;Bonitz, M.;
7:5:92:2     Quantum breathing mode of interacting particles in a one-dimensional harmonic trap
DOI:10.1103/PhysRevB.86.125112  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Abraham, Jan Willem;Balzer, Karsten;Hochstuhl, David;Bonitz, Michael;
7:5:92:3     Theory of the Quantum Breathing Mode in Harmonic Traps and its Use as a Diagnostic Tool
DOI:10.1103/PhysRevLett.111.256801  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: McDonald, C. R.;Orlando, G.;Abraham, J. W.;Hochstuhl, D.;Bonitz, M.;Brabec, T.;
7:5:92:4     Plasmon dynamics in strongly driven finite few-electron quantum systems: The role of the surface
DOI:10.1103/PhysRevB.81.045314  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Destefani, Carlos F.;McDonald, Chris;Sukiasyan, Suren;Brabec, Thomas;
7:5:93:1     Ferromagnetic Enhancement of CE-Type Spin Ordering in (Pr, Ca)MnO3
DOI:10.1103/PhysRevLett.106.186404  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:14  AU: Zhou, S. Y.;Zhu, Y.;Langner, M. C.;Chuang, Y. -D.;Yu, P.;Yang, W. L.;Gonzalez, A. G. Cruz;Tahir, N.;Rini, M.;Chu, Y. -H.;Ramesh, R.;Lee, D. -H.;Tomioka, Y.;Tokura, Y.;Hussain, Z.;Schoenlein, R. W.;
7:5:93:2     Imprinting Magnetic Information in Manganites with X Rays
DOI:10.1103/PhysRevLett.109.157203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:3  AU: Garganourakis, M.;Scagnoli, V.;Huang, S. W.;Staub, U.;Wadati, H.;Nakamura, M.;Guzenko, V. A.;Kawasaki, M.;Tokura, Y.;
7:5:93:3     Imaging of 3d Mn orbitals in the ferromagnetic state for Ca-substituted manganite: Magnetic Compton investigation
DOI:10.1103/PhysRevB.85.045128  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Rumble, Christopher;Itou, M.;Hiraoka, N.;Sakurai, Y.;Tomioka, Y.;Tokura, Y.;Penner-Hahn, James E.;Deb, Aniruddha;
7:5:94:1     Investigation of magnetic signatures and microstructures for heat-treated ferritic/martensitic HT-9 alloy
DOI:10.1016/j.actamat.2013.02.017  JN:ACTA MATERIALIA  PY:2013
  TC:5  AU: Henager, Charles H., Jr.;McCloy, John S.;Ramuhalli, Pradeep;Edwards, Danny J.;Hu, Shenyang;Li, Yulan;
7:5:94:2     Effects of domain, grain, and magnetic anisotropy distributions on magnetic permeability: Monte-Carlo approach
DOI:10.1063/1.4737417  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Chun, Jaehun;Jones, A. Mark;McCloy, John S.;
7:5:94:3     Ferromagnetic resonance of micro- and nano-sized hexagonal ferrite powders at millimeter waves
DOI:10.1063/1.3671793  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Korolev, Konstantin A.;McCloy, John S.;Afsar, Mohammed N.;
7:5:95:1     Structural and magnetic properties of NiAs-type FeSe and related alloy layers
DOI:10.1116/1.4807653  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:1  AU: Song, Guibin;Matsui, Hiroaki;Akai, Hisazumi;Tabata, Hitoshi;
7:5:95:2     Pulsed laser deposition conditions and superconductivity of FeSe thin films
DOI:10.1007/s00339-010-6136-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:7  AU: Tsukada, A.;Luna, K. E.;Hammond, R. H.;Beasley, M. R.;Zhao, J. F.;Risbud, S. H.;
7:5:95:3     First-principles prediction of spin-density-reflection symmetry driven magnetic transition of CsCl-type FeSe
DOI:10.1016/j.jmmm.2010.05.051  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Rahman, Gul;Kim, In Gee;Freeman, Arthur J.;
7:5:96:1     High precision electronic charge density determination for L1(0)-ordered gamma-TiAl by quantitative convergent beam electron diffraction
DOI:10.1080/14786435.2012.709324  JN:PHILOSOPHICAL MAGAZINE  PY:2012
  TC:1  AU: Sang, Xiahan;Kulovits, Andreas;Wang, Guofeng;Wiezorek, Joerg;
7:5:96:2     Effect of impurity atoms on alpha(2)/gamma lamellar interfacial misfit in Ti-Al alloy: a systematic first principles study
DOI:10.1080/14786435.2011.588971  JN:PHILOSOPHICAL MAGAZINE  PY:2011
  TC:2  AU: Koizumi, Yuichiro;Yoshiya, Masato;Sugihara, Atsushi;Minamino, Yoritoshi;
7:5:96:3     Differential convergent beam electron diffraction: Experiment and theory
DOI:10.1103/PhysRevB.81.115135  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Nakashima, Philip N. H.;Muddle, Barrington C.;
7:5:96:4     Effect of stress orientation on microstructural evolution during creep of near-lamellar Ti-47Al-2Cr-2Nb
DOI:10.1016/j.msea.2012.10.033  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2013
  TC:0  AU: Babu, R. Prasath;Karthikeyan, S.;
7:5:97:1     Nonequilibrium Bose-Einstein condensation of hot magnons
DOI:10.1103/PhysRevB.82.140404  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Vannucchi, Fabio Stucchi;Vasconcellos, Aurea Rosas;Luzzi, Roberto;
7:5:97:2     Ginzburg-Landau model of Bose-Einstein condensation of magnons
DOI:10.1103/PhysRevB.81.024418  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Malomed, B. A.;Dzyapko, O.;Demidov, V. E.;Demokritov, S. O.;
7:5:97:3     Emission of monochromatic microwave radiation from a nonequilibrium condensation of excited magnons
DOI:10.1063/1.4818312  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Vannucchi, Fabio Stucchi;Vasconcellos, Aurea Rosas;Luzzi, Roberto;
7:5:98:1     Spin reorientation and magnetoelastic coupling in Tb6Fe1-xCoxBi2 (x=0, 0.125, 0.25, and 0.375) alloy system
DOI:10.1016/j.jallcom.2014.06.183  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Koehler, M. R.;Garlea, V. O.;McGuire, M. A.;Jia, L.;Keppens, V.;
7:5:98:2     Structural and magnetic properties of Tb6Fe1-xCoxBi2 (0 <= x <= 0.375) compounds
DOI:10.1063/1.3565515  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Jia, Lin;Koehler, Michael;McCarthy, David;McGuire, Michael A.;Keppens, Veerle;
7:5:98:3     Elastic and magnetostrictive properties of Tb6Fe1-xCoxBi2 (0 <= x <= 0.375)
DOI:10.1063/1.3549613  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Koehler, Michael R.;Jia, Lin;McCarthy, David;McGuire, Michael A.;Keppens, Veerle;
7:5:99:1     Structural distortion and orbital ordering in the triangular-lattice antiferromagnet NaVO2 from first principles
DOI:10.1103/PhysRevB.83.094417  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Ouyang, Z. W.;Xia, N. M.;Sheng, S. S.;Chen, J.;Xia, Z. C.;Rao, G. H.;Zheng, X. H.;
7:5:99:2     P2-NaxVO2 system as electrodes for batteries and electron-correlated materials
DOI:10.1038/NMAT3478  JN:NATURE MATERIALS  PY:2013
  TC:79  AU: Guignard, Marie;Didier, Christophe;Darriet, Jacques;Bordet, Pierre;Elkaim, Erik;Delmas, Claude;
7:5:99:3     First-principles study of structural distortions in frustrated antiferromagnet alpha-NaMnO2
DOI:10.1103/PhysRevB.82.064405  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Ouyang, Z. W.;Wang, B.;
7:5:100:1     Probing magnetic order in CuFeO2 through nuclear forward scattering in high magnetic fields
DOI:10.1103/PhysRevB.88.060408  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Strohm, C.;Lummen, T. T. A.;Handayani, I. P.;Roth, T.;Detlefs, C.;van der Linden, P. J. E. M.;van Loosdrecht, P. H. M.;
7:5:100:2     Nuclear Forward Scattering of Synchrotron Radiation in Pulsed High Magnetic Fields
DOI:10.1103/PhysRevLett.104.087601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:5  AU: Strohm, C.;Van der Linden, P.;Rueffer, R.;
7:5:100:3     Nuclear Forward Scattering of Synchrotron Radiation in Pulsed High Magnetic Fields (vol 104, 087601, 2010)
DOI:10.1103/PhysRevLett.104.159903  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:0  AU: Strohm, C.;Van der Linden, P.;Rueffer, R.;
7:5:101:1     Cation-ordered A'(1/2)A"1/2B2X4 magnetic spinels as magnetoelectrics
DOI:10.1016/j.jmmm.2014.04.019  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:1  AU: Ter-Oganessian, N. V.;
7:5:101:2     Breathing Pyrochlore Lattice Realized in A-Site Ordered Spinel Oxides LiGaCr4O8 and LiInCr4O8
DOI:10.1103/PhysRevLett.110.097203  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Okamoto, Yoshihiko;Nilsen, Goran J.;Attfield, J. Paul;Hiroi, Zenji;
7:5:102:1     Spontaneous parity breaking in spin-orbital coupled systems
DOI:10.1103/PhysRevB.90.081115  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Hayami, Satoru;Kusunose, Hiroaki;Motome, Yukitoshi;
7:5:102:2     Toroidal order in metals without local inversion symmetry
DOI:10.1103/PhysRevB.90.024432  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Hayami, Satoru;Kusunose, Hiroaki;Motome, Yukitoshi;
7:5:103:1     Transport, magnetic and structural properties of Mott insulator MnV2O4 at the boundary between localized and itinerant electron limit
DOI:10.1007/s10853-014-8444-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:0  AU: Shahi, Prashant;Kumar, Saurabh;Sharma, Neetika;Singh, Ripandeep;Sastry, P. U.;Das, A.;Kumar, A.;Shukla, K. K.;Ghosh, A. K.;Nigam, A. K.;Chatterjee, Sandip;
7:5:103:2     The magnesium doping effect of the vanadate spinel MnV2O4
DOI:10.1016/j.jmmm.2010.11.084  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:3  AU: Huang, Yuanjie;Qu, Zhe;Zhang, Yuheng;
7:6:1:1     Synthesis and Microwave Dielectric Properties of Novel Temperature Stable High Q, Li(2)ATi(3)O(8) (A=Mg, Zn) Ceramics
DOI:10.1111/j.1551-2916.2010.03703.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:75  AU: George, Sumesh;Sebastian, Mailadil Thomas;
7:6:1:2     Microwave dielectric properties and low temperature sintering behavior of Li2CoTi3O8 ceramic
DOI:10.1016/j.jallcom.2010.10.078  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:23  AU: Fang, Liang;Chu, Dongjin;Zhou, Huanfu;Chen, Xiuli;Yang, Zhao;
7:6:1:3     Microwave dielectric properties of temperature stable Li2ZnxCo1-xTi3O8 ceramics
DOI:10.1016/j.jallcom.2011.06.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:11  AU: Fang, Liang;Chu, Dongjin;Zhou, Huanfu;Chen, Xiuli;Zhang, Hui;Chang, Baocheng;Li, Chunchun;Qin, Yuandong;Huang, Xi;
7:6:1:4     Microwave dielectric properties of novel temperature stable high Q Li2Mg1-xZnxTi3O8 and Li(2)A(1-x)Ca(x)Ti(3)O(8) (A = Mg, Zn) ceramics
DOI:10.1016/j.jeurceramsoc.2010.05.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:34  AU: George, Sumesh;Sebastian, Mailadil Thomas;
7:6:1:5     High Q Microwave Dielectric Ceramics in the Li-2(Zn(1-x)A(x))Ti3O8 (A = Mg, Co; x=0.02-0.1) System
DOI:10.1111/j.1551-2916.2011.04894.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:19  AU: Huang, Cheng-Liang;Su, Chia-Hui;Chang, Chung-Min;
7:6:1:6     Microwave dielectric properties and chemical compatibility with silver electrode of low-fired Li2Cu0.2Mg0.8Ti3O8 ceramic
DOI:10.1016/j.ceramint.2013.02.095  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Tang, Ying;Fang, Liang;Zhou, Huanfu;Liu, Qinwen;Zhang, Hui;
7:6:1:7     ZnLi2/3Ti4/3O4: A new low loss spinel microwave dielectric ceramic
DOI:10.1016/j.jeurceramsoc.2011.08.036  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:27  AU: Zhou, Huanfu;Liu, Xiaobin;Chen, Xiuli;Fang, Liang;Wang, Yiliang;
7:6:1:8     Novel Low-Firing Microwave Dielectric Ceramic LiCa3MgV3O12 with Low Dielectric Loss
DOI:10.1111/jace.12156  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:16  AU: Fang, Liang;Su, Congxue;Zhou, Huanfu;Wei, Zhenhai;Zhang, Hui;
7:6:1:9     A new low-loss microwave dielectric ceramic for low temperature cofired ceramic applications
DOI:10.1557/JMR.2010.0160  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:21  AU: Zhou, Huanfu;Chen, Xiuli;Fang, Liang;Chu, Dongjin;Wang, Hong;
7:6:1:10     Structural, Raman spectroscopic and microwave dielectric studies on spinel Li2Zn(1-x)NixTi3O8 compounds
DOI:10.1016/j.matchemphys.2013.06.010  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:2  AU: Singh, Santosh Kumar;Kiran, S. Roopas;Murthy, V. R. K.;
7:6:1:11     Microwave dielectric properties of Li2ZnTi3O8 ceramics doped with Bi2O3
DOI:10.1016/j.ceramint.2013.05.095  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Lu, Xuepeng;Zheng, Yong;Zhou, Bin;Dong, Zuowei;Cheng, Peng;
7:6:1:12     Microwave dielectric properties and its compatibility with silver electrode of Li2MgTi3O8 ceramics
DOI:10.1016/j.jallcom.2011.02.134  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:15  AU: Chen, Xiuli;Zhou, Huanfu;Fang, Liang;Liu, Xiaobin;Wang, Yiliang;
7:6:1:13     Effect of H3BO3 on the low temperature sintering and microwave dielectric properties of Li2ZnTi3O8 ceramics
DOI:10.1016/j.jallcom.2012.04.035  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:9  AU: Zhang, Ping;Hua, Yanbo;Xia, Wangsuo;Li, Lingxia;
7:6:1:14     Microwave dielectric properties and compatibility with silver of low-fired Li2Cu0.1Zn0.9Ti3O8 ceramic
DOI:10.1016/j.matlet.2012.04.120  JN:MATERIALS LETTERS  PY:2012
  TC:3  AU: Fang, Liang;Liu, Qinwen;Su, Congxue;Liao, Wei;Zhang, Hui;
7:6:1:15     Microwave dielectric properties of Li2ZnTi3O8 ceramics doped with ZnO-B2O3 frit
DOI:10.1016/j.matlet.2011.12.048  JN:MATERIALS LETTERS  PY:2012
  TC:20  AU: Li, Huakai;Lu, Wenzhong;Lei, Wen;
7:6:1:16     Microwave dielectric characteristics of Li-2(Mg0.94M0.06)Ti3O8 (M = Zn, Co, and Mn) ceramics
DOI:10.1016/j.ceramint.2012.12.015  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Wang, Lijing;Sun, Qingchi;Ma, Weibing;Huan, Zhengli;
7:6:1:17     A novel thermally stable low-firing LiMg4V3O12 ceramic: Sintering characteristic, crystal structure and microwave dielectric properties
DOI:10.1016/j.ceramint.2013.10.114  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Zhou, Huanfu;He, Fen;Chen, Xiuli;Chen, Jie;Fang, Liang;Wang, Wei;Miao, Yanbing;
7:6:1:18     Microwave Dielectric Properties of MLi2Ti6O14 [M=Ba and Sr] Ceramics and Their Compatibility with Sliver
DOI:10.1111/jace.13344  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Su, Congxue;Fang, Weishuang;Wei, Zhenhai;Tang, Ying;Fang, Liang;
7:6:1:19     Ba5Li2W3O15: A New Li-Containing Perovskite-Type Microwave Ceramic with High Q and Low tau(f)
DOI:10.1111/jace.12649  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Fang, Liang;Wei, Zhenhai;Liao, Wei;Zhou, Huanfu;Zhang, Hui;Xiang, Fei;
7:6:1:20     The effect of composition on Li-2(Mg0.3Zn0.7)Ti3O8-xTiO(2) microwave dielectric ceramics for low temperature co-fired ceramics technology application
DOI:10.1016/j.matlet.2012.12.091  JN:MATERIALS LETTERS  PY:2013
  TC:7  AU: Tong, Jianxi;Zhang, Bin;Huang, Wei;Yang, Hui;
7:6:1:21     A novel low firing microwave dielectric ceramic NaCa2Mg2V3O12
DOI:10.1016/j.ceramint.2013.05.041  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Fang, Liang;Xiang, Fei;Su, Congxue;Zhang, Hui;
7:6:1:22     Structural Evolution and Microwave Dielectric Properties of Li(3-3x)M4xNb(1-x)O4 (M = Mg,Zn; 0 <= x <= 0.9)
DOI:10.1111/j.1551-2916.2010.04244.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Bian, Jianjiang;Liang, Zhu;Wang, Liang;
7:6:1:23     Adjustable dielectric properties of Li2CuxZn1-xTi3O8 (x=0 to 1) ceramics with low sintering temperature
DOI:10.1016/j.ceramint.2012.05.018  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Fang, Liang;Liu, Qinwen;Tang, Ying;Zhang, Hui;
7:6:1:24     Microwave properties of low-fired Li2ZnTi3O8 ceramics doped with CuO-Bi2O3-V2O5
DOI:10.1016/j.jallcom.2013.10.108  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: He, Ming;Zhang, Huaiwu;
7:6:1:25     A Novel Magneto-Dielectric Solid Solution Ceramic 0.25LiFe(5)O(8)-0.75Li(2)ZnTi(3)O(8) with Relatively High Permeability and Ultra-Low Dielectric Loss
DOI:10.1111/jace.12075  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: He, Li;Zhou, Di;Yang, Haibo;Guo, Jing;Wang, Hong;
7:6:1:26     Role of Nano- and Micron-Sized Particles of TiO2 Additive on Microwave Dielectric Properties of Li2ZnTi3O8-4 wt% TiO2 Ceramics
DOI:10.1111/jace.12640  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:0  AU: Bari, M.;Taheri-Nassaj, E.;Taghipour-Armaki, H.;
7:6:1:27     Effect of TiO2 Ratio on the Phase and Microwave Dielectric Properties of Li2ZnTi3+x O8+2x Ceramics
DOI:10.1007/s11664-014-3026-4  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:7  AU: Li, Yingxiang;Li, Hao;Li, Junshan;Tang, Bin;Zhang, Shuren;Chen, Hetuo;Wei, Ya;
7:6:1:28     Sintering behavior, phase evolution and microwave dielectric properties of thermally stable (1-x)Li3NbO4 - xCaTiO(3) composite ceramic
DOI:10.1016/j.ceramint.2013.07.124  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Zhou, Huanfu;Wang, Wei;Chen, Xiuli;Miao, Yanbing;Liu, Xiaobin;Fang, Liang;He, Fen;
7:6:1:29     A new Li0.5Sm0.5WO4 low temperature firing microwave dielectric ceramic
DOI:10.1016/j.jallcom.2010.04.200  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Yang, Haibo;Lin, Ying;Zhu, Jianfeng;Wang, Fen;Dai, Zhonghua;
7:6:1:30     A Novel Magnetodielectric Solid Solution Ceramic 0.4LiFe(5)O(8)-0.6Li(2)MgTi(3)O(8) with Excellent Microwave Dielectric Properties
DOI:10.1111/jace.12565  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: He, Li;Zhou, Di;Xiang, Feng;Chang, Panpan;Li, Yong;Wang, Hong;
7:6:1:31     Preparation, phase structure and microwave dielectric properties of a new low cost MgLi2/3Ti4/3O4 compound
DOI:10.1016/j.matchemphys.2012.09.004  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:5  AU: Zhou, Huanfu;Liu, Xiaobin;Chen, Xiuli;Fang, Liang;
7:6:1:32     Preparation, phase structure and microwave dielectric properties of CoLi2/3Ti4/3O4 ceramic
DOI:10.1016/j.materresbull.2012.02.012  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:7  AU: Zhou, Huanfu;Liu, Xiaobin;Chen, Xiuli;Fang, Liang;
7:6:1:33     Low-temperature sintering and microwave dielectric properties of Li2ZnTi3O8 ceramics
DOI:10.1016/j.matlet.2013.06.041  JN:MATERIALS LETTERS  PY:2013
  TC:3  AU: Zhang, Ping;Wang, Yue;Hua, Yanbo;Han, Yemei;Li, Lingxia;
7:6:1:34     Effect of sintering aid on microwave dielectric behaviors of Ni0.5Ti0.5NbO4 ceramics for LTCC applications
DOI:10.1016/j.matchemphys.2014.05.027  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:1  AU: Tseng, Ching-Fang;Chen, Chao-Chen;Lin, Chen-Wei;
7:6:1:35     Low-temperature sintering and compatibility with silver electrode of Ba4MgTi11O27 microwave dielectric ceramic
DOI:10.1016/j.materresbull.2010.06.012  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:5  AU: Chen, Xiuli;Zhou, Huanfu;Fang, Liang;Liu, Laijun;Li, Changda;Guo, Ruli;Wang, Hong;
7:6:2:1     High-Q dielectrics using ZnO-modified Li2TiO3 ceramics for microwave applications
DOI:10.1016/j.jeurceramsoc.2012.03.030  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:16  AU: Huang, Cheng-Liang;Tseng, Yu-Wei;Chen, Jhih-Yong;
7:6:2:2     New high Q microwave dielectric ceramics with rock salt structures: (1-x)Li2TiO3 + xMgO system (0 <= x <= 0.5)
DOI:10.1016/j.jeurceramsoc.2009.04.030  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:26  AU: Bian, J. J.;Dong, Y. F.;
7:6:2:3     Temperature stable microwave dielectric ceramic 0.3Li(2)TiO(3)-0.7Li(Zn0.5Ti1.5)O-4 with ultra-low dielectric loss
DOI:10.1016/j.matlet.2011.05.083  JN:MATERIALS LETTERS  PY:2011
  TC:14  AU: Wu, Ying;Zhou, Di;Guo, Jing;Pang, Li-Xia;Wang, Hong;Yao, Xi;
7:6:2:4     Microwave dielectric properties of Li2TiO3 ceramics doped with LiF for LTCC applications
DOI:10.1016/j.jallcom.2012.10.110  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Hao, Yi-Zhou;Yang, Hui;Chen, Guo-Hua;Zhang, Qi-Long;
7:6:2:5     A new temperature stable microwave dielectric ceramic with low-sintering temperature in Li2TiO3-Li2Zn3Ti4O12 system
DOI:10.1016/j.jallcom.2014.02.002  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Sayyadi-Shahraki, A.;Taheri-Nassaj, E.;Hassanzadeh-Tabrizi, S. A.;Barzegar-Bafrooei, H.;
7:6:2:6     Microwave Dielectric Properties of Low-Firing Li(2)MO(3) (M = Ti, Zr, Sn) Ceramics with B(2)O(3)-CuO Addition
DOI:10.1111/j.1551-2916.2010.04152.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:20  AU: Pang, Li-Xia;Zhou, Di;
7:6:2:7     Structural evolution, sintering behavior and microwave dielectric properties of (1-x)Li3NbO4-xLiF (0 <= x <= 0.9)
DOI:10.1016/j.jeurceramsoc.2011.12.026  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Bian, J. J.;Wu, J. Y.;Wang, L.;
7:6:2:8     Sintering behavior, microstructure and microwave dielectric properties of Li2+xTiO3 (0 <= x <= 0.2)
DOI:10.1016/j.mseb.2010.10.016  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:16  AU: Bian, J. J.;Dong, Y. F.;
7:6:2:9     Structural evolution and microwave dielectric properties of MgO-LiF co-doped Li2TiO3 ceramics for LTCC applications
DOI:10.1016/j.ceramint.2014.06.134  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Xu, Nuo-Xin;Zhou, Jue-Hui;Yang, Hui;Zhang, Qi-Long;Wang, Min-Jia;Hu, Liang;
7:6:2:10     Novel Temperature Stable Li2MnO3 Dielectric Ceramics with High Q for LTCC Applications
DOI:10.1111/jace.12871  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Tseng, Ching-Fang;Tseng, Po-Ju;Chang, Chi-Min;Kao, Yu-Chieh;
7:6:2:11     Microwave dielectric properties of Li2TiO3 ceramics sintered at low temperatures
DOI:10.1016/j.mseb.2010.09.009  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:15  AU: Liang, Jun;Lu, Wen-Zhong;Wu, Jia-Min;Guan, Jian-Guo;
7:6:2:12     Enhanced sintering characteristics and microwave dielectric properties of Li2TiO3 due to nano-size and nonstoichiometry effect
DOI:10.1039/c2jm33788f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:7  AU: Hao, Yi-zhou;Zhang, Qi-long;Zhang, Jian;Xin, Cheng-rong;Yang, Hui;
7:6:2:13     Microwave dielectric properties of Li2ZnTi3O8 ceramics doped with ZnO-B2O3-SiO2 glass
DOI:10.1016/j.matlet.2012.09.087  JN:MATERIALS LETTERS  PY:2013
  TC:13  AU: Lv, Xuepeng;Zheng, Yong;Zhou, Bin;Dong, Zuowei;Cheng, Peng;
7:6:2:14     Microwave dielectric properties of [(Mg0.5Zn0.5)(0.95)Co-0.05](2)TiO4 ceramics with BaCu(B2O5) sintered at low temperatures
DOI:10.1016/j.jallcom.2012.07.054  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:1  AU: Chen, Yuan-Bin;
7:6:2:15     Low-temperature sintering and microwave dielectric properties of Li3MO4 (M = Ta, Sb) ceramics
DOI:10.1016/j.jallcom.2012.02.047  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:9  AU: Pang, Li-Xia;Liu, Huan;Zhou, Di;Yang, Jia-Xing;Li, Dang-Juan;Liu, Wei-Guo;
7:6:2:16     Low temperature sintering and microwave dielectric properties of 0.6Li(2)ZnTi(3)O(8)-0.4Li(2)TiO(3) ceramics doped with ZnO-B2O3-SiO2 glass
DOI:10.1016/j.matlet.2014.05.169  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Lu, Xuepeng;Zheng, Yong;Dong, Zuowei;Huang, Qi;
7:6:2:17     Phase structure and microwave dielectric properties of (1-x)Li2Zn3Ti4O12-xTiO(2) ceramics
DOI:10.1016/j.jallcom.2011.11.116  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Liu, Xiaobin;Zhou, Huanfu;Chen, Xiuli;Fang, Liang;
7:6:2:18     Structural evolution, sintering behavior and microwave dielectric properties of (1-x)Li2TiO3 + xLiF ceramics
DOI:10.1016/j.materresbull.2013.03.043  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Ding Yaomin;Bian Jianjiang;
7:6:2:19     Sintering behavior and microwave dielectric properties of (1-x) Li2TiO3+xLiF ceramics prepared by enhanced sintering
DOI:10.1016/j.ceramint.2013.09.066  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Bian Jianjiang;Ding Yaomin;
7:6:2:20     A new glass-free LTCC microwave ceramic - (1-x) Li2.08TiO3 + xLiF
DOI:10.1016/j.materresbull.2013.08.076  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Bian, Jianjiang;Ding, Yaomin;
7:6:2:21     Microwave dielectric properties of low-fired Li2TiO3 ceramics doped with Li2O-MgO-B2O3 frit
DOI:10.1016/j.matlet.2012.08.063  JN:MATERIALS LETTERS  PY:2012
  TC:6  AU: Chen, Guo-hua;Hou, Mei-zhen;Yang, Yun;
7:6:2:22     Low temperature sintering and microwave dielectric properties of Ba-3(PO4)(2)-BaWO4 composite ceramics
DOI:10.1016/j.ceramint.2014.01.062  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Zhen, Wang;Jiang, Bian Jian;
7:6:2:23     Microwave Dielectric Properties of Novel Glass-Free Low-Firing Li2CeO3 Ceramics
DOI:10.1111/jace.12880  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Tseng, Ching-Fang;Lin, Po-An;
7:6:2:24     Microstructure and microwave dielectric properties of (1-y)Li3NbO4+yLi(2)TiO(3)(Li2SnO3) ceramics
DOI:10.1016/j.mseb.2012.09.004  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:2  AU: Wu, N. X.;Bian, J. J.;
7:6:2:25     Comparison for the crystal structure, synthesis and microwave dielectric properties of alkaline earth orthophosphates
DOI:10.1016/j.matchemphys.2012.03.023  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:3  AU: Guo, Teng;Wu, WenJun;Wang, YiLin;Li, YongXiang;
7:6:3:1     Microwave Dielectric Ceramics in Li2O-Bi2O3-MoO3 System with Ultra-Low Sintering Temperatures
DOI:10.1111/j.1551-2916.2009.03526.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:43  AU: Zhou, Di;Randall, Clive A.;Wang, Hong;Pang, Li-Xia;Yao, Xi;
7:6:3:2     Novel low-firing microwave dielectric ceramics: BaMV2O7 (M=Mg, Zn)
DOI:10.1016/j.ceramint.2014.08.032  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Fang, Liang;Wei, Zhenhai;Su, Congxue;Xiang, Fei;Zhang, Hui;
7:6:3:3     Novel Series of Low-Firing Microwave Dielectric Ceramics: Ca5A4(VO4)6 (A2+=Mg, Zn)
DOI:10.1111/jace.12359  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Yao, Guo-Guang;Liu, Peng;Zhang, Huai-Wu;
7:6:3:4     Low-temperature sintering and microwave dielectric properties of Ca5Co4(VO4)(6) ceramics
DOI:10.1016/j.jeurceramsoc.2014.03.026  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Yao, Guoguang;Liu, Peng;Zhao, Xiaogang;Zhou, Jianping;Zhang, Huaiwu;
7:6:3:5     LiCa3ZnV3O12: A novel low-firing, high Q microwave dielectric ceramic
DOI:10.1016/j.ceramint.2013.08.081  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:9  AU: Su, Congxue;Fang, Liang;Wei, Zhenhai;Kuang, Xiaojun;Zhang, Hui;
7:6:3:6     New vanadium based Ba3MV4O15 (M=Ti and Zr) high Q ceramics for LTCC applications
DOI:10.1016/j.ceramint.2012.10.192  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Suresh, E. K.;Unnimaya, A. N.;Surjith, A.;Ratheesh, R.;
7:6:3:7     High Q ceramics in the ACe(2)(MoO4)(4) (A = Ba, Sr and Ca) system for LTCC applications
DOI:10.1016/j.jallcom.2012.09.055  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Surjith, A.;Ratheesh, R.;
7:6:3:8     Synthesis and Microwave Dielectric Properties of Zn3B2O6 Ceramics for Substrate Application
DOI:10.1111/j.1551-2916.2012.05192.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:12  AU: Wu, Xin-Guang;Wang, Hong;Chen, Yue-Hua;Zhou, Di;
7:6:3:9     Low-Temperature Sintering and Microwave Dielectric Properties of (Mg0.95Zn0.05)(2)(Ti0.8Sn0.2)O-4-(Ca0.8Sr0.2)TiO3 Composite Ceramics
DOI:10.1111/jace.12432  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Yao, Guoguang;Liu, Peng;Zhang, Huaiwu;
7:6:3:10     Low temperature firing microwave dielectric ceramics (K(0.5)Ln(0.5))MoO4 (Ln =Nd and Sm) with low dielectric loss
DOI:10.1016/j.jeurceramsoc.2011.07.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:17  AU: Zhou, Di;Pang, Li-Xia;Guo, Jing;Zhang, Gao-Qun;Wu, Ying;Wang, Hong;Yao, Xi;
7:6:3:11     Microwave Dielectric Properties of Low-Temperature Sinterable BaCe2(MoO4)(4) Ceramics
DOI:10.1111/j.1551-2916.2009.03508.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: James, Nijesh Kunnamkuzhakal;Ratheesh, Ravendran;
7:6:3:12     Ln(2)Mo(3)O(12) (Ln = La, Nd): A novel group of low loss microwave dielectric ceramics with low sintering temperature
DOI:10.1016/j.matlet.2010.09.064  JN:MATERIALS LETTERS  PY:2011
  TC:11  AU: Pang, Li-Xia;Sun, Guo-Bin;Zhou, Di;
7:6:3:13     Microwave dielectric ceramic with intrinsic low firing temperature: BaLa2(MoO4)(4)
DOI:10.1016/j.matlet.2011.12.084  JN:MATERIALS LETTERS  PY:2012
  TC:6  AU: Pang, Li-Xia;Liu, Huan;Zhou, Di;Sun, Guo-Bin;Qin, Wen-Gang;Liu, Wei-Guo;
7:6:3:14     Infrared spectroscopy and microwave dielectric properties of ultra-low temperature firing (K0.5La0.5)MoO4 ceramics
DOI:10.1016/j.matlet.2012.10.082  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Pang, Li-Xia;Zhou, Di;Cai, Chang-Long;Liu, Wei-Guo;
7:6:3:15     Synthesis, structural and microwave dielectric properties of Al2W3-xMoxO12 (x=0-3) ceramics
DOI:10.1016/j.jallcom.2011.08.007  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:1  AU: Surjith, A.;James, Nijesh K.;Ratheesh, R.;
7:6:3:16     Low-Temperature Sintering and Microwave Dielectric Properties of the Li2CO3-Added Ba2V2O7 Ceramics
DOI:10.1111/j.1551-2916.2009.03504.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Joung, Mi-Ri;Kim, Jin-Seong;Song, Myung-Eun;Nahm, Sahn;Paik, Jong-Hoo;
7:6:3:17     New Microwave Dielectric Ceramics BaLn(2)(MoO4)(4) (Ln = Nd and Sm) with Low Loss
DOI:10.1111/j.1551-2916.2011.04727.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Zhou, Di;Pang, Li-Xia;Guo, Jing;Wu, Ying;Zhang, Gao-Qun;Dai, Wei;Wang, Hong;Yao, Xi;
7:6:3:18     Microwave Dielectric Properties of Ultralow-Temperature Cofirable Ba3V4O13 Ceramics
DOI:10.1111/jace.12802  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Kalathil, Suresh E.;Neelakantan, Unnimaya A.;Ratheesh, Raveendran;
7:6:3:19     Microstructure and Microwave Dielectric Properties of the Li2CO3-Added Sr2V2O7 Ceramics
DOI:10.1111/j.1551-2916.2010.03676.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Joung, Mi-Ri;Kim, Jin-Seong;Song, Myung-Eun;Nahm, Sahn;Paik, Jong-Hoo;
7:6:3:20     Effect of glass fillers in Cu2ZnNb2O8 ceramics for advanced microwave applications
DOI:10.1016/j.matchemphys.2012.10.014  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:1  AU: Varghese, Jobin;Gopinath, Sumesh;Sebastian, Mailadil Thomas;
7:6:4:1     Microwave Dielectric Properties of Li-2(M2+)(2)Mo3O12 and Li-3(M3+)Mo3O12 (M=Zn, Ca, Al, and In) Lyonsite-Related-Type Ceramics with Ultra-Low Sintering Temperatures
DOI:10.1111/j.1551-2916.2010.04148.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:30  AU: Zhou, Di;Randall, Clive A.;Pang, Li-Xia;Wang, Hong;Wu, Xin-Guang;Guo, Jing;Zhang, Gao-Qun;Shui, Li;Yao, Xi;
7:6:4:2     Microwave Dielectric Properties of Li2WO4 Ceramic with Ultra-Low Sintering Temperature
DOI:10.1111/j.1551-2916.2010.04312.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:27  AU: Zhou, Di;Randall, Clive A.;Pang, Li-Xia;Wang, Hong;Guo, Jing;Zhang, Gao-Qun;Wu, Xin-Guang;Shui, Li;Yao, Xi;
7:6:4:3     Sintering behavior and microwave dielectric properties of a new low-permittivity ceramic system Ca(Mg1-xAlx)(Si1-x/2Alx/2)(2)O-6
DOI:10.1016/j.ceramint.2013.09.101  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Wang, Huanping;Li, Denghao;Yang, Qinghua;Lei, Ruoshan;Ma, Hongping;Xu, Shiqing;
7:6:4:4     Sintering behavior and microwave dielectric properties of CaMgSi2O6 ceramics with Al2O3 addition
DOI:10.1016/j.materresbull.2014.03.014  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Wang, Huanping;Li, Denghao;Yang, Qinghua;Lei, Ruoshan;Ma, Hongping;Xu, Shiqing;
7:6:4:5     Effect of B2O3 addition on the sintering temperature and microwave dielectric properties of Zn2SiO4 ceramics
DOI:10.1016/j.jeurceramsoc.2009.04.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:26  AU: Kim, Jin-Seong;Song, Myung-Eun;Joung, Mi-Ri;Choi, Jae-Hong;Nahm, Sahn;Gu, Sin-Il;Paik, Jong-Hoo;Choi, Byung-Hyun;
7:6:4:6     Low-temperature sintering and microwave dielectric properties of LiF-doped CaMg1-xZnxSi2O6 ceramics
DOI:10.1016/j.ceramint.2012.08.058  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:13  AU: Zhang, Jie;Zhou, Yuanyuan;Yue, Zhenxing;
7:6:4:7     Improving sintering characteristic and dielectric properties of kermanite (Ca2MgSi2O7) ceramics by Bi2O3-B2O3 addition
DOI:10.1016/j.matlet.2014.02.011  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Zhao, Xin-hui;Wang, Min-Jia;Zhang, Qi-long;Yang, Hui;Hu, Lang;Yu, Dan;
7:6:4:8     Effects of CaSiO3 addition on sintering behavior and microwave dielectric properties of Al2O3 ceramics
DOI:10.1016/j.ceramint.2010.11.020  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:14  AU: Chen, Jin-min;Wang, Huan-ping;Feng, Si-qiao;Ma, Hong-ping;Deng, De-gang;Xu, Shi-qing;
7:6:4:9     Temperature compensating ZnAl2O4-Co2TiO4 spinel-based low-permittivity microwave dielectric ceramics
DOI:10.1016/j.ceramint.2011.06.043  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:11  AU: Lei, Wen;Lu, Wen-Zhong;Wang, Xiao-Chuan;
7:6:4:10     Effects of Al2O3 addition on the sintering behavior and microwave dielectric properties of CaSiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2011.09.014  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:14  AU: Wang, Huanping;Chen, Jinmin;Yang, Wenyi;Feng, Siqiao;Ma, Hongping;Jia, Guohua;Xu, Shiqing;
7:6:4:11     Low temperature sintering and microwave dielectric properties of CaSiO3-Al2O3 ceramics for LTCC applications
DOI:10.1016/j.ceramint.2013.08.031  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:7  AU: Wang, Huanping;He, Zuopeng;Li, Denghao;Lei, Ruoshan;Chen, Jinmin;Xu, Shiqing;
7:6:4:12     Glass-Free LTCC Microwave Ceramic-(La0.5Na0.5)(1-x)(Li0.5Nd0.5)(x)WO4
DOI:10.1111/j.1551-2916.2011.04757.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Bian, Jian Jiang;Wang, Liang;
7:6:4:13     Low-Temperature Sintering and Microwave Dielectric Properties of CaMoO4-Based Temperature Stable LTCC Material
DOI:10.1111/jace.12996  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Pang, Li-Xia;Zhou, Di;Liu, Wei-Guo;
7:6:4:14     Low temperature sintering and microwave dielectric properties of Ce-2(WO4)(3) ceramics
DOI:10.1016/j.ceramint.2010.02.026  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:7  AU: Anjana, Prabhakaran Sreekumari;Joseph, Tony;Sebastian, Mailadil Thomas;
7:6:4:15     Sintering behavior and microwave dielectric properties of Ca1-xBixW1-xVxO4 ceramics
DOI:10.1016/j.ceramint.2012.07.106  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Ding Yaomin;Bian Jianjiang;
7:6:4:16     Designing of Glass-Free LTCC Microwave Ceramic-Ca1-x(Li0.5Nd0.5)xWO4 by Crystal Chemistry
DOI:10.1111/j.1551-2916.2011.04790.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Bian, Jian Jiang;Wu, Jia Yin;
7:6:4:17     Relations on synthesis, crystal structure and microwave dielectric properties of SrZnP2O7 ceramics
DOI:10.1016/j.ceramint.2011.04.080  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Guo, Teng;Wu, Wenjun;Wang, Yilin;Li, Yongxiang;
7:6:4:18     Low-temperature sintering and microwave dielectric properties of (Zn1-xCox)(2)SiO4 ceramics
DOI:10.1016/j.ceramint.2014.06.053  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Chen, Hua-Wen;Su, Hua;Zhang, Huai-Wu;Zhou, Ting-Chuan;Zhang, Bo-Wen;Zhang, Jian-Feng;Tang, Xiao-li;
7:6:4:19     Ultra-Low-Fire Te-2(Mo1-xWx)O-7 Ceramics: Microstructure and Microwave Dielectric Properties
DOI:10.1111/j.1551-2916.2010.04010.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Wang, Sea-Fue;Wang, Yuh-Ruey;Hsu, Yung-Fu;Lu, Hsi-Chuan;Tsai, Jung-Shiung;
7:6:4:20     Low temperature sintering and microwave dielectric properties of Li2TiO3-Li2WO4 composite ceramics
DOI:10.1016/j.ceramint.2013.05.029  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Wang Zhen;Song Li;Bian Jianjiang;
7:6:4:21     Development of Low Firing NPO Based on (Ca,Sr)(Ti,Zr)O-3 for Co-Firing Cu Electrode
DOI:10.1080/00150193.2012.740370  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Chiang, Chen-Su;Lee, Wen-Hsi;Yang, Hsueh Jen;Lee, Ying-Chieh;
7:6:5:1     Reaction-sintering method for ultra-low loss (Mg0.95Co0.05)TiO3 ceramics
DOI:10.1016/j.jallcom.2011.04.062  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Li, Lingxia;Ding, Xiang;Liao, Qingwei;
7:6:5:2     Microwave dielectric properties of ATiO(3) (A = Ni, Mg, Co, Mn) ceramics
DOI:10.1016/j.jeurceramsoc.2009.08.017  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:23  AU: Kim, Eung Soo;Jeon, Chang Jun;
7:6:5:3     Microwave dielectric properties of (1-x)Mg0.95Zn0.05TiO3-(x)Ca0.6La0.8/3TiO3 ceramic composites
DOI:10.1016/j.jallcom.2012.10.019  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Rajput, Shailendra Singh;Keshri, Sunita;Gupta, Vibha Rani;
7:6:5:4     Structural and dielectric studies of Co doped MgTiO3 thin films fabricated by RF magnetron sputtering
DOI:10.1063/1.4886379  JN:AIP ADVANCES  PY:2014
  TC:2  AU: Kumar, T. Santhosh;Gogoi, P.;Thota, S.;Pamu, D.;
7:6:5:5     The structure and properties of 0.95MgTiO(3)-0.05CaTiO(3) ceramics doped with Co2O3
DOI:10.1007/s10853-014-8294-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:1  AU: Li, Hao;Tang, Bin;Li, Xuan;Qing, Zhenjun;Li, Yingxiang;Yang, Han;Wang, Qiang;Zhang, Shuren;
7:6:5:6     A new low-loss microwave dielectric using (Ca0.8Sr0.2)TiO3-doped MgTiO3 ceramics
DOI:10.1016/j.matlet.2010.08.046  JN:MATERIALS LETTERS  PY:2010
  TC:16  AU: Chen, Jhih-Yong;Huang, Cheng-Liang;
7:6:5:7     Synthesis of nanocrystalline magnesium titanate by an auto-igniting combustion technique and its structural, spectroscopic and dielectric properties
DOI:10.1016/j.materresbull.2010.03.019  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:11  AU: Suresh, M. K.;Thomas, J. K.;Sreemoolanadhan, H.;George, C. N.;John, Annamma;Solomon, Sam;Wariar, P. R. S.;Koshy, J.;
7:6:5:8     Investigation on low loss (1-x) Mg0.95Co0.05TiO3-(x) Ca0.6La0.8/3TiO3 composite series for achieving a nearly zero temperature coefficient of resonant frequency
DOI:10.1016/j.ceramint.2013.08.090  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Keshri, Sunita;Rajput, Shailendra Singh;
7:6:5:9     Characterization and dielectric behavior of V2O5-doped 0.9Mg(0.95)Co(0.05)TiO(3)-0.1Ca(0.6)La(0.8/3)TiO(3) ceramic system at microwave frequency
DOI:10.1016/j.jallcom.2009.09.045  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Shen, Chun-Hsu;Huang, Cheng-Liang;Lin, Ling-Mei;Pan, Chung-Long;
7:6:5:10     Enhanced Microwave Dielectric Properties of (Zr0.8,Sn0.2)TiO4 Ceramics with the Addition of Its Own Nanoparticles
DOI:10.1111/j.1551-2916.2011.04853.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:16  AU: Pamu, D.;Rao, G. Lakshmi Narayana;Raju, K. C. James;
7:6:5:11     Structure and properties analysis for low-loss (Mg1-xCox)TiO3 microwave dielectric materials prepared by reaction-sintering method
DOI:10.1016/j.ceramint.2011.10.024  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Li, Lingxia;Ding, Xiang;Liao, Qingwei;
7:6:5:12     Design of microwave dielectric resonator antenna using MZTO-CSTO composite
DOI:10.1016/j.ceramint.2011.10.088  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Rajput, Shailendra Singh;Keshri, Sunita;Gupta, Vibha Rani;Gupta, Nisha;Bovtun, Viktor;Petzelt, Jan;
7:6:5:13     Structural and microwave characterization of Ni0.2CoxZn0.8-xFe2O4 for antenna applications
DOI:10.1016/j.ceramint.2013.07.045  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:12  AU: Mohit, Kumar;Gupta, Vibha Rani;Gupta, Nisha;Rout, S. K.;
7:6:5:14     Microwave dielectric properties of the (1-x)( Mg0.95Zn0.05)TiO3-x(Ca0.8SM0.4/3)TiO3 temperature stable ceramics
DOI:10.1016/j.matlet.2014.06.105  JN:MATERIALS LETTERS  PY:2014
  TC:3  AU: Zhang, Yi-Ding;Zhou, Di;Guo, Jing;Xi, Hai-Hong;He, Bin;
7:6:5:15     Structural, vibrational and microwave dielectric properties of (1-x)Mg0.95Co0.05TiO3-(x)Ca0.8Sr0.2TiO3 ceramic composites
DOI:10.1016/j.jallcom.2013.05.225  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Rajput, Shailendra Singh;Keshri, Sunita;
7:6:5:16     Effect of Cobalt Doping on the Structural, Microstructure and Microwave Dielectric Properties of MgTiO3 Ceramics Prepared by Semi Alkoxide Precursor Method
DOI:10.1111/jace.12851  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Kumar, Thatikonda Santhosh;Gogoi, Pallabi;Perumal, Alagarsamy;Sharma, Pramod;Pamu, Dobbidi;
7:6:5:17     Ni and Zn doped MgTiO3 thin films: Structure, microstructure, and dielectric characteristics
DOI:10.1063/1.3356938  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Surendran, Kuzhichalil P.;Wu, Aiying;Vilarinho, Paula M.;Ferreira, Victor M.;
7:6:5:18     Preparation of pure MgTiO3 powders and the effect of the ZnNb2O6-dope onto the property of MgTiO3-based ceramics
DOI:10.1016/j.jallcom.2009.11.140  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:14  AU: Tang, Bin;Zhang, Shuren;Zhou, Xiaohua;Deng, Chao;Yu, Shengquan;
7:6:5:19     Improvements in the Sintering Behavior and Microwave Dielectric Properties of Geikielite-Type MgTiO3 Ceramics
DOI:10.1007/s11664-012-2349-2  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:6  AU: Wu, H. T.;Jiang, Y. S.;Cui, Y. J.;Zhang, X. H.;Jia, X.;Yue, Y. L.;
7:6:5:20     Low-Loss Microwave Dielectric Material Based on Magnesium Titanate
DOI:10.1111/j.1551-2916.2010.03790.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Shih, Chuan-Feng;Li, Wei-Min;Tung, Kuo-Shin;
7:6:5:21     A new dielectric material system using (1-x)(Mg0.95Co0.05)(2)TiO4-xCa(0.8)Sm(0.4/3)TiO(3) at microwave frequencies
DOI:10.1016/j.matchemphys.2009.10.050  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:2  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;Li, Bing-Jing;
7:6:5:22     Dielectric properties of ambient temperature grown nanocrystalline ZrTiO4 thin films using DC magnetron sputtering
DOI:10.1016/j.mseb.2009.12.028  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:3  AU: Pamu, D.;Sudheendran, K.;Krishna, M. Ghanashyam;Raju, K. C. James;
7:6:5:23     Characterization of ZrTiO4 thin films prepared by sol-gel method
DOI:10.1016/j.mssp.2013.01.015  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2013
  TC:1  AU: Hsu, Cheng-Hsing;Lin, Shih-Yao;
7:6:5:24     MgTiO3/polystyrene composites with low dielectric loss
DOI:10.1016/j.ceramint.2011.04.081  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Im, Dong Hyeok;Jeon, Chang Jun;Kim, Eung Soo;
7:6:5:25     The structure and properties of 0.95MgTiO(3)-0.05CaTiO(3) ceramics co-doped with ZnO-ZrO2
DOI:10.1016/j.ceramint.2011.04.050  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Yang Xiaojing;Ding Shihua;Liu Xiaobing;Yu Bo;Yang Xiuling;Song Tianxiu;
7:6:5:26     Effects of CeO2 nanoparticles and annealing temperature on the microwave dielectric properties of MgTiO3 ceramics
DOI:10.1016/j.ceramint.2013.06.113  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Thatikonda, Santhosh Kumar;Goswami, Dayananda;Dobbidi, Pamu;
7:6:6:1     Synthesis and microwave dielectric properties of Ca3SnSi2O9 ceramics
DOI:10.1016/j.jallcom.2012.01.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:17  AU: Wu, S. P.;Chen, D. F.;Mei, Y. X.;Ma, Q.;
7:6:6:2     Synthesis of monoclinic CaSnSiO5 ceramics and their microwave dielectric properties
DOI:10.1016/j.matlet.2012.09.065  JN:MATERIALS LETTERS  PY:2013
  TC:10  AU: Wu, S. P.;Chen, D. F.;Jiang, C.;Mei, Y. X.;Ma, Q.;
7:6:6:3     Synthesis and microwave dielectric properties of Nd2SiO5 ceramics
DOI:10.1016/j.jallcom.2012.07.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:11  AU: Jiang, Chan;Wu, Songping;Ma, Qing;Mei, Youxian;
7:6:6:4     Synthesis and microwave dielectric properties of B2O3-doped Mg2GeO4 ceramics
DOI:10.1016/j.jallcom.2013.05.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:8  AU: Chen, C. X.;Wu, S. P.;Fan, Y. X.;
7:6:6:5     Synthesis and microwave dielectric properties of Zn2SnO4 ceramics
DOI:10.1016/j.ceramint.2013.06.106  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Ma, Qing;Wu, Songping;Fan, Yingxian;
7:6:6:6     Synthesis, characterization and microwave dielectric properties of spinel MgGa2O4 ceramic materials
DOI:10.1016/j.jallcom.2013.09.176  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Wu, Songping;Xue, Juanjuan;Wang, Rui;Li, Jianhui;
7:6:6:7     Synthesis and Microwave Dielectric Properties of Sm2SiO5 Ceramics
DOI:10.1111/j.1551-2916.2011.04935.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:14  AU: Wu, Songping;Jiang, Chan;Mei, Youxian;Tu, Weiping;
7:6:6:8     ZnxGa2O3+x (0 <= x <= 1) solid solution nanocrystals: tunable composition and optical properties
DOI:10.1039/c1jm13091a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:13  AU: Yuan, Yanping;Du, Weimin;Qian, Xuefeng;
7:6:6:9     Synthesis, Microstructure, and Microwave Dielectric Properties of Spinel ZnGa2O4 Ceramics
DOI:10.1111/jace.12331  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Xue, Juanjuan;Wu, Songping;Li, Jianhui;
7:6:6:10     Spinel Mg(Al, Ga)(2)O-4 Solid Solution as High-Performance Microwave Dielectric Ceramics
DOI:10.1111/jace.13157  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Wu, Songping;Xue, Juanjuan;Fan, Yingxian;
7:6:6:11     Synthesis, characterization and microwave dielectric properties of Zn2GeO4 ceramics
DOI:10.1016/j.jallcom.2013.03.052  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Wu, Songping;Ma, Qing;
7:6:6:12     Synthesis of (Zn, Mg)TiO3-TiO2 composite ceramics for multilayer ceramic capacitors
DOI:10.1016/j.matchemphys.2010.06.045  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:6  AU: Jiang, C.;Wu, S. P.;Tu, W. P.;Jiao, L.;Zeng, Z. O.;
7:6:6:13     Preparation and structural characterization of SnO2 and GeO2 methanol steam reforming thin film model catalysts by (HR)TEM
DOI:10.1016/j.matchemphys.2010.03.057  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:9  AU: Lorenz, Harald;Zhao, Qian;Turner, Stuart;Lebedev, Oleg I.;van Tendeloo, Gustaaf;Kloetzer, Bernhard;Rameshan, Christoph;Penner, Simon;
7:6:6:14     Microstructure and Microwave Dielectric Properties of xCa(Al0.5Nb0.5)O-3+(1-x)SrTiO3 Solid Solutions
DOI:10.1111/j.1551-2916.2010.03915.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Hu, Mingzhe;Fu, Yang;Luo, Chunya;Gu, Haoshuang;Lei, Wen;Shen, Qiang;
7:6:6:15     Atomic-scale characterization of the nucleation and growth of SnO2 particles in oxidized CuSn alloys
DOI:10.1016/j.scriptamat.2012.09.005  JN:SCRIPTA MATERIALIA  PY:2013
  TC:2  AU: Dubey, M.;Sauvage, X.;Cuvilly, F.;Jouen, S.;Hannoyer, B.;
7:6:7:1     Microwave Dielectric Characteristics of (Mg0.95M0.05)Ta2O6 (M = Ni, Zn, Mn) Ceramic Series
DOI:10.1016/j.matlet.2012.02.066  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;
7:6:7:2     Low loss and temperature stable microwave dielectrics using Li-2(Mg(1-x)A(x))Ti3O8 (A(2+) = Zn, Co; x=0.02-0.1) ceramics
DOI:10.1016/j.jallcom.2014.03.131  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Su, Chia-Hui;Ho, Yi-Da;Huang, Cheng-Liang;
7:6:7:3     Dielectric properties of high-Q (Mg1-xZnx)(1.8)Ti1.1O4 ceramics at microwave frequency
DOI:10.1016/j.jeurceramsoc.2012.02.043  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Huang, Cheng-Liang;Tseng, Yu-Wei;Chen, Jhih-Yong;Kuo, Yuan-Cheng;
7:6:7:4     Temperature stable high-Q microwave dielectric ceramics in (1-x)BaTi4O9-xBaZn(2)Ti(4)O(11) system
DOI:10.1016/j.matlet.2011.10.007  JN:MATERIALS LETTERS  PY:2012
  TC:10  AU: Yu, Shengquan;Tang, Bin;Zhang, Shuren;Zhang, Xiao;
7:6:7:5     Composite dielectrics (1-y)(Mg1-xZnx)(1.8)Ti1.1O4-yCaTiO(3) suitable for microwave applications
DOI:10.1016/j.jallcom.2012.03.091  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:2  AU: Li, Lingxia;Zhang, Mingming;Liao, Qingwei;Xia, Wangsuo;Ding, Xiang;
7:6:7:6     Low-Loss Microwave Dielectrics in the (Mg1-xCox)(1.8)Ti1.1O4 (x=0.03-1.00) Solid Solutions
DOI:10.1111/j.1551-2916.2011.04464.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Huang, Cheng-Liang;Tseng, Yu-Wei;Kuo, Yuan-Cheng;
7:6:7:7     Structure and properties analysis for MgTiO3 and (Mg0.97M0.03)TiO3 (M = Ni, Zn, Co and Mn) microwave dielectric materials
DOI:10.1016/j.jallcom.2012.05.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Zhang, Mingming;Li, Lingxia;Xia, Wangsuo;Liao, Qingwei;
7:6:7:8     Sr4-mLamTim-1Ta4-mO12 (m=1, 2, 3): A Novel Series of A(4)B(3)O(12)-Type Microwave Ceramics with a High Q and Low tau(f)
DOI:10.1111/j.1551-2916.2010.03657.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Fang, Liang;Li, Chunchun;Peng, Xiyang;Hu, Changzheng;Wu, Bolin;
7:6:7:9     Structure, Dielectric Properties, and Applications of CaTiO3-Modified Ca4MgNb2TiO12 Ceramics at Microwave Frequency
DOI:10.1111/j.1551-2916.2010.04328.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Huang, Cheng-Liang;Tseng, Yu-Wei;
7:6:7:10     Effects of CaF2 addition on sintering behavior and microwave dielectric properties of ZnTa2O6 ceramics
DOI:10.1016/j.matlet.2011.07.044  JN:MATERIALS LETTERS  PY:2011
  TC:10  AU: Xia, Wang-Suo;Li, Ling-Xia;Zhang, Ping;Ning, Ping-Fan;
7:6:7:11     Effect of Zn-excess on sintering behavior and microwave dielectric properties in Mg0.97Zn0.03TiO3 ceramics
DOI:10.1016/j.jallcom.2014.08.085  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Li, Lingxia;Gao, Zhengdong;Ren, Qun;Cai, Haocheng;Li, Sai;
7:6:7:12     Microwave dielectric properties of Mg1.8Ti1.1O4 ceramics
DOI:10.1016/j.matlet.2010.01.053  JN:MATERIALS LETTERS  PY:2010
  TC:5  AU: Huang, Cheng-Liang;Tseng, Yu-Wei;
7:6:7:13     Raman spectra and extended X-ray absorption fine structure characterization of La(2-x)/3NaxTiO3 and Nd(2-x)/3LixTiO3 microwave ceramics
DOI:10.1016/j.jeurceramsoc.2009.07.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Chen, Mei-Yu;Chiu, Ching Yu;Chia, Chia-Ta;Lee, J. F.;Bian, J. J.;
7:6:7:14     A high improved quality factor of Li2MgTi3O8 microwave dielectric ceramics system
DOI:10.1016/j.matlet.2014.03.002  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Zhang, Ping;Wang, Yue;Liu, Jian;Song, Zhenkun;Han, Yemei;Li, Lingxia;
7:6:7:15     Microwave dielectric properties of La4Ti3O12 ceramics
DOI:10.1016/j.matlet.2013.10.113  JN:MATERIALS LETTERS  PY:2014
  TC:5  AU: Li, Zhengfa;Wu, Wenjun;Liu, Feng;Li, Yongxiang;Si, Pingzhan;Ge, Hongliang;
7:6:8:1     Effects of BaCu(B2O5) addition on phase transition, sintering temperature and microwave properties of Ba4LiTa3O12 ceramics
DOI:10.1016/j.jallcom.2010.10.091  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:18  AU: Chu, Dongjin;Fang, Liang;Zhou, Huanfu;Chen, Xiuli;Yang, Zhao;
7:6:8:2     Ba4LiNb3-xTaxO12 (x=0-3): A Series of High-Q Microwave Dielectrics from the Twinned 8H Hexagonal Perovskites
DOI:10.1111/j.1551-2916.2009.03548.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:22  AU: Fang, Liang;Li, Chunchun;Peng, Xiyang;Hu, Changzheng;Wu, Bolin;Zhou, Huangfu;
7:6:8:3     Effects of BaCu(B2O5) Addition on Phase Transition, Sintering Temperature, and Microwave Properties of Ba4LiNb3O12 Ceramics
DOI:10.1111/j.1551-2916.2010.04100.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:17  AU: Fang, Liang;Chu, Dongjin;Li, Chunchun;Zhou, Huanfu;Yang, Zhao;
7:6:8:4     New 8-Layer Twinned Hexagonal Perovskite Microwave Dielectric Ceramics Ba8Ga4-xTa4+0.6xO24
DOI:10.1021/cm2025944  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:13  AU: Cao, Jiang;Kuang, Xiaojun;Allix, Mathieu;Dickinson, Calum;Claridge, John B.;Rosseinsky, Matthew J.;Iddles, David M.;Su, Qiang;
7:6:8:5     Microwave dielectric properties of Ba3LiNb3-xSbxTi5O21(x=0-3) ceramics
DOI:10.1016/j.matlet.2012.02.076  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Fang, Liang;Liao, Wei;Wu, Meixia;Liu, Qinwen;Tang, Ying;Zhang, Hui;
7:6:8:6     Phase structure, band gap and microwave dielectric properties of Ba8Ti3Nb4-xSbxO24 ceramics
DOI:10.1016/j.ceramint.2012.06.067  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Fang, Liang;Su, Congxue;Wei, Zhenhai;Zhou, Huanfu;Zhang, Hui;
7:6:8:7     Structural analysis and properties of thermally stable Ba8Mg(Nb6-xSbx)O-24 microwave ceramics
DOI:10.1016/j.jallcom.2010.11.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Suresh, M. K.;John, Annamma;Thomas, J. K.;Wariar, P. R. S.;Solomon, Sam;
7:6:8:8     A high Q and temperature stable microwave dielectric ceramic Ba4LiTa2SbO12
DOI:10.1016/j.ceramint.2013.12.077  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Tang, Ying;Fang, Liang;Su, Congxue;Zhang, Hui;
7:6:8:9     Structural, spectroscopic and dielectric investigations on Ba8Zn(Nb6-xSbx)O-24 microwave ceramics
DOI:10.1016/j.materresbull.2010.06.053  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:6  AU: Suresh, M. K.;John, Annamma;Thomas, J. K.;Wariar, P. R. S.;Solomon, Sam;
7:6:8:10     Microstructures and microwave dielectric properties of Ba4LiNb3O12-BaWO4 composite ceramics
DOI:10.1016/j.mseb.2012.10.038  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Tian, Cailan;Yue, Zhenxing;Zhou, Yuanyuan;
7:6:8:11     Conductivity, Dielectric Loss, and Electrical Heterogeneous Microstructure of Eight-Layer Twinned Hexagonal Perovskite Ceramics Ba8CuTa6O24-delta
DOI:10.1111/jace.12349  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Yu, Xiaodi;Chai, Shiqiang;Kuang, Xiaojun;Su, Congxue;Pan, Fengjuan;Fang, Liang;Su, Qiang;
7:6:8:12     Synthesis, structural analysis and dielectric properties of Ba-8(Mg1-xZnx)Nb6O24 hexagonal perovskites
DOI:10.1016/j.ceramint.2012.05.026  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Solomon, Sam;Suresh, M. K.;Thomas, J. K.;Prasad, V. S.;Wariar, P. R. S.;
7:6:8:13     Ba4LiNb3-xSbxO12: Phase evolution, microstructure and optimized microwave dielectric properties
DOI:10.1016/j.matlet.2013.01.075  JN:MATERIALS LETTERS  PY:2013
  TC:0  AU: Zhou, Huanfu;Liu, Xiaobin;Chen, Xiuli;Wang, Wei;Fang, Liang;
7:6:8:14     Phase transition and microwave dielectric properties of LiY(W1-xTex)(2)O-8 (0.0 <= x <= 0.2)
DOI:10.1016/j.matchemphys.2010.07.051  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:3  AU: Wang, L.;Bian, J. J.;Guo, Q. H.;
7:6:8:15     Stabilization and tunable microwave dielectric properties of the rutile polymorph in alpha-PbO2-type GaTaO4-based ceramics
DOI:10.1039/c4tc00295d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:0  AU: Pan, Zhengwei;Yu, Xiaodi;Wang, Quanchao;Cao, Jiang;Pan, Fengjuan;Liang, Chaolun;Lu, Fengqi;Kuang, Xiaojun;Su, Congxue;Wang, Jing;Fang, Liang;
7:6:8:16     Tunable high Q perovskite dielectrics in the BaO-NiO-Ta2O5 system
DOI:10.1007/s10853-011-5455-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:3  AU: Thirumal, Meganathan;Davies, Peter K.;
7:6:9:1     Effects of packing fraction and bond valence on microwave dielectric properties of A(2+)B(6+)O(4) (A(2+): Ca, Pb, Ba; B6+: Mo, W) ceramics
DOI:10.1016/j.jeurceramsoc.2009.12.018  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:50  AU: Kim, Eung Soo;Chun, Byung Sam;Freer, Robert;Cernik, Robert J.;
7:6:9:2     New Low-Loss Microwave Dielectric Material ZnTiNbTaO8
DOI:10.1111/j.1551-2916.2011.04815.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:25  AU: Liao, Qingwei;Li, Lingxia;Ren, Xiang;Ding, Xiang;
7:6:9:3     Effects of Crystal Structure on the Microwave Dielectric Properties of ABO(4) (A = Ni, Mg, Zn and B = Mo, W) Ceramics
DOI:10.1111/j.1551-2916.2012.05274.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:16  AU: Kim, Eung Soo;Jeon, Chang Jun;Clem, Paul G.;
7:6:9:4     Ultra-Low Fire Glass-Free Li3FeMo3O12 Microwave Dielectric Ceramics
DOI:10.1111/jace.13073  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Liao, Qingwei;Wang, Yunli;Jiang, Feng;Guo, Dong;
7:6:9:5     Effect of Li2O-V2O5 addition on the sintering behavior and microwave dielectric properties of Li-3(Mg1-xZnx)(2)NbO6 ceramics
DOI:10.1016/j.ceramint.2014.07.090  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Zhang, Tianwen;Zuo, Ruzhong;
7:6:9:6     A New Temperature Stable Microwave Dielectric Material Mg0.5Zn0.5TiNb2O8
DOI:10.1111/j.1551-2916.2012.05148.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Liao, Qingwei;Li, Lingxia;Ding, Xiang;Ren, Xiang;
7:6:9:7     Effect of Ion Substitution for Nd 3+Based on Structural Characteristic on the Microwave Dielectric Properties of NdNbO4 Ceramic System
DOI:10.1111/jace.12717  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Zhang, Ping;Song, Zhenkun;Wang, Yue;Li, Lingxia;
7:6:9:8     Crystal structure refinement and microwave dielectric properties of new low dielectric loss AZrNb(2)O(8) (A: Mn, Zn, Mg and Co) ceramics
DOI:10.1016/j.scriptamat.2013.04.018  JN:SCRIPTA MATERIALIA  PY:2013
  TC:4  AU: Ramarao, S. D.;Murthy, V. R. K.;
7:6:9:9     Microwave dielectric properties of low loss microwave dielectric ceramics: A(0.5)Ti(0.5)NbO(4) (A = Zn, Co)
DOI:10.1016/j.jeurceramsoc.2014.06.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Tseng, Ching-Fang;
7:6:9:10     A new microwave dielectric material Ni0.5Ti0.5NbO4
DOI:10.1016/j.matlet.2012.08.078  JN:MATERIALS LETTERS  PY:2012
  TC:8  AU: Liao, Qingwei;Li, Lingxia;Ren, Xiang;Yu, Xiaoxu;Meng, Qinglei;Xia, Wangsuo;
7:6:9:11     Ultra-Low-Fire Zn2Te3O8-TiTe3O8 Ceramic Composites
DOI:10.1111/j.1551-2916.2010.04170.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Wang, Sea-Fue;Hsu, Yung-Fu;Wang, Yuh-Ruey;Sung, Chuan-Chun;
7:6:9:12     Crystal structure and microwave dielectric properties of Zn0.9Ti0.8-xSnxNb2.2O8 ceramics
DOI:10.1016/j.ceramint.2012.01.053  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Li, Lingxia;Ren, Xiang;Liao, Qingwei;
7:6:9:13     Microwave dielectric properties of (Zn1/3B2/3)(0.5)(Ti0.8Mn0.2)(0.5)O-2 (B = Nb5+, Ta5+, M = Sn4+, Ge4+) ceramics
DOI:10.1016/j.ceramint.2011.04.072  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Kim, Eung Soo;Seo, Seock No;
7:6:9:14     Microstructure and microwave dielectric characteristics of ZnTi(Nb1-xSbx)(2)O-8 ceramics
DOI:10.1016/j.ceramint.2014.04.063  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Li, Lingxia;Cal, Haocheng;Ren, Qun;Sun, Hao;Gao, Zhengdong;
7:6:9:15     Microwave Dielectric Properties of Scheelite Structured PbMoO4 Ceramic with Ultralow Sintering Temperature
DOI:10.1111/jace.12915  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Xi, Hai-Hong;Zhou, Di;He, Bin;Xie, Hui-Dong;
7:6:9:16     The microwave dielectric properties of (Ni, Zn)(0.5)Ti0.5NbO4 solid solution
DOI:10.1016/j.matlet.2013.09.069  JN:MATERIALS LETTERS  PY:2013
  TC:3  AU: Chen, Tiankai;Ma, Weibing;Sun, Qingchi;Tang, Cuicui;Huan, Zhengli;Niu, Benben;
7:6:10:1     Ultra-Low Firing High-k Scheelite Structures Based on [(Li0.5Bi0.5)(x)Bi1-x][MoxV1-x]O-4 Microwave Dielectric Ceramics
DOI:10.1111/j.1551-2916.2010.03689.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:25  AU: Zhou, Di;Randall, Clive A.;Wang, Hong;Pang, Li-Xia;Yao, Xi;
7:6:10:2     Ferroelastic phase transition compositional dependence for solid-solution [(Li0.5Bi0.5)(x)Bi1-x][MoxV1-x]O-4 scheelite-structured microwave dielectric ceramics
DOI:10.1016/j.actamat.2010.11.014  JN:ACTA MATERIALIA  PY:2011
  TC:22  AU: Zhou, D.;Qu, W. G.;Randall, C. A.;Pang, L. X.;Wang, H.;Wu, X. G.;Guo, J.;Zhang, G. Q.;Shui, L.;Wang, Q. P.;Liu, H. C.;Yao, X.;
7:6:10:3     Phase transition, Raman spectra, infrared spectra, band gap and microwave dielectric properties of low temperature firing (Na0.5xBi1-0.5x)(MoxV1-x)O-4 solid solution ceramics with scheelite structures
DOI:10.1039/c1jm14004c  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:22  AU: Zhou, Di;Pang, Li-Xia;Wang, Hong;Guo, Jing;Yao, Xi;Randall, Clive A.;
7:6:10:4     Phase evolution, phase transition, and microwave dielectric properties of scheelite structured xBi(Fe1/3Mo2/3)O-4-(1-x)BiVO4 (0.0 <= x <= 1.0) low temperature firing ceramics
DOI:10.1039/c2jm34603f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:17  AU: Zhou, Di;Pang, Li-Xia;Guo, Jing;Qi, Ze-Ming;Shao, Tao;Yao, Xi;Randall, Clive A.;
7:6:10:5     Microwave dielectric properties of (ABi)(1/2)MoO4 (A = Li, Na, K, Rb, Ag) type ceramics with ultra-low firing temperatures
DOI:10.1016/j.matchemphys.2011.05.040  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:17  AU: Zhou, Di;Randall, Clive A.;Pang, Li-Xia;Wang, Hong;Guo, Jing;Zhang, Gao-Qun;Wu, Ying;Guo, Ke-Ting;Shui, Li;Yao, Xi;
7:6:10:6     Structural, lattice vibrational, optical and microwave dielectric studies on Ca1-xSrxMoO4 ceramics with scheelite structure
DOI:10.1016/j.materresbull.2014.04.064  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:3  AU: Ramarao, S. D.;Kiran, S. Roopas;Murthy, V. R. K.;
7:6:10:7     Ca(Zn1/3Nb2/3-xVx)O-3 solid solution: Microstructural evolution, optimized sintering behavior and microwave dielectric properties
DOI:10.1016/j.ceramint.2013.09.048  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Zhou, Huanfu;Chen, Xiuli;Fang, Liang;Wang, Wei;
7:6:10:8     Correlation Between Structural Characteristics and Microwave Dielectric Properties of Scheelite Ca1-xCdxMoO4 Solid Solution
DOI:10.1111/j.1551-2916.2012.05317.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Rao, S. D. Rama;Kiran, S. Roopas;Murthy, V. R. K.;
7:6:10:9     Phase Evolution and Microwave Dielectric Properties of (Bi1-xFex)VO4(x <= 0.40) Ceramics
DOI:10.1111/jace.13068  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Zhou, Di;Bin, He;Guo, Jing;Pang, Li-Xia;Qi, Ze-Ming;Shao, Tao;Wang, Qiu-Ping;Yue, Zhen-Xing;Yao, Xi;
7:6:10:10     Effects of Al2O3 addition on the microstructure and microwave dielectric properties of Ba4Nd9.33Ti18O54 ceramics
DOI:10.1016/j.ceramint.2012.05.063  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Yao, Xiaogang;Lin, Huixing;Zhao, Xiangyu;Chen, Wei;Luo, Lan;
7:6:10:11     Anti-reduction of Ti4+ in Ba4.2Sm9.2Ti18O54 ceramics by doping with MgO, Al2O3 and MnO2
DOI:10.1016/j.ceramint.2011.11.082  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Yao, Xiaogang;Lin, Huixing;Chen, Wei;Luo, Lan;
7:6:10:12     Temperature-independent and enhanced dielectric properties for two-layer structure capacitors with 0.8Pb(Fe2/3W1/3) O-3-0.2PbTiO(3)-MnO and 0.7Pb(Fe2/3W1/3) O-3-0.3PbTiO(3)-MnO ceramics
DOI:10.1016/j.ceramint.2012.09.070  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Hong, Cheng-Shong;Chu, Sheng-Yuan;Tsai, Cheng-Che;Su, Wen-Chang;Su, Hsiu-Hsien;
7:6:11:1     Dielectric properties and crystal structure of Mg2TiO4 ceramics substituting Mg2+ with Zn2+ and Co2+
DOI:10.1016/j.jallcom.2011.10.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:15  AU: Chen, Yuan-Bin;
7:6:11:2     Characterization and dielectric behavior of B2O3-doped 0.9Mg(0.95)Co(0.05)TiO(3)-0.1Ca(0.6)La(0.8/3)TiO(3) ceramic system at microwave frequency
DOI:10.1016/j.jallcom.2010.05.098  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Shen, Chun-Hsu;Huang, Cheng-Liang;Lin, Ling-Mei;Pan, Chung-Long;
7:6:11:3     Low temperature sintering and microwave dielectric properties of Bi4B2O9-added 0.25CaTiO(3)-0.75(Li1/2Nd1/2)TiO3 ceramics
DOI:10.1016/j.jallcom.2012.06.037  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Chen, Xingyu;Bai, Shuxin;Zhang, Weijun;
7:6:11:4     New dielectric material system of Nd(Mg1/2Ti1/2)O-3-CaTiO3 with V2O5 addition for microwave applications
DOI:10.1016/j.jallcom.2009.09.160  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Huang, Cheng-Liang;Lin, Shih-Hung;Chen, Yuan-Bin;
7:6:11:5     Synthesis, Crystal Structure, and Microwave Dielectric Properties of (Mg1-xCox)Ta2O6 Solid Solutions
DOI:10.1111/j.1551-2916.2009.03389.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;
7:6:11:6     Enhanced densification and microwave dielectric properties of Mg2TiO4 ceramics added with CeO2 nanoparticles
DOI:10.1016/j.mseb.2012.12.014  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:2  AU: Bhuyan, R. K.;Kumar, T. Santhosh;Goswami, D.;James, A. R.;Perumal, A.;Pamu, D.;
7:6:11:7     The effect of non-stoichiometry on the microstructure and microwave dielectric properties of the Mg1+delta TiO3+delta ceramics
DOI:10.1016/j.jallcom.2011.07.092  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Huang, Cheng-Liang;Liu, Shih-Sheng;Chen, Shih-Hsuan;
7:6:11:8     Dielectric properties of B2O3-doped 0.92(Mg0.95Co0.05)(2)TiO4-0.08(Ca0.8Sr0.2)TiO3 ceramics for microwave applications
DOI:10.1016/j.jallcom.2010.06.051  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Li, Bing-Jing;Chen, Jhih-Yong;Huang, Guan-Sian;Jiang, Chang-Yang;Huang, Cheng-Liang;
7:6:11:9     A new low-loss dielectric using CaTiO3-modified (Mg0.95Mn0.05)TiO3 ceramics for microwave applications
DOI:10.1016/j.jallcom.2010.01.014  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;Huang, Guan-Sian;
7:6:11:10     x(Mg0.7Zn0.3)(0.95)Co0.05TiO3-(1-x)(La0.5Na0.5)TiO3 ceramic at microwave frequency with a near zero temperature coefficient of resonant frequency
DOI:10.1016/j.jallcom.2009.09.103  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:13  AU: Huang, Cheng-Liang;Lin, Shih-Hung;Liu, Shih-Sheng;Chen, Yuan-Bin;
7:6:11:11     Effect of CaTiO3 addition on microwave dielectric properties of Mg-2(Ti0.95Sn0.05)O-4 ceramics
DOI:10.1016/j.jallcom.2010.06.194  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;Li, Bing-Jing;
7:6:11:12     Crystal structure and dielectric properties of La(Mg1-xZnx)(1/2)Ti1/2O3 ceramics at microwave frequencies
DOI:10.1016/j.jallcom.2010.09.170  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Chen, Yuan-Bin;
7:6:11:13     A novel low-loss microwave dielectric using (Ca0.8Sr0.2)TiO3-modified (Mg0.95Co0.05)(2)TiO4 ceramics
DOI:10.1016/j.jallcom.2010.02.041  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Chen, Jhih-Yong;Huang, Cheng-Liang;
7:6:11:14     Dielectric characteristics of Sr substitution on Ca0.4Sm0.4TiO3 ceramics at microwave frequency
DOI:10.1016/j.ceramint.2014.01.109  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Hsu, Cheng-Hsing;Tsai, Shang-Hung;
7:6:11:15     Effect of CeO2 and Nd2O3 on the Microstructure and Microwave Dielectric Properties of (Zr-0.8, Sn-0.2)TiO4 Ceramics
DOI:10.1080/10584587.2010.489454  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:3  AU: Pamu, D.;Rao, G. Lakshmi Narayana;Saravanan, K. Venkata;Raju, K. C. James;
7:6:11:16     Low-loss microwave dielectrics in the Mg-2(Ti0.95Sn0.05)O-4-(Ca0.8Sr0.2)TiO3 ceramic system
DOI:10.1016/j.jallcom.2009.12.177  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:1  AU: Chen, Jhih-Yong;Jiang, Chang-Yang;Huang, Cheng-Liang;
7:6:12:1     Low-loss microwave dielectrics using rock salt oxide Li2MgTiO4
DOI:10.1016/j.jallcom.2011.06.010  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:13  AU: Tseng, Yu-Wei;Chen, Jhih-Yong;Kuo, Yuan-Cheng;Huang, Cheng-Liang;
7:6:12:2     Low-loss microwave dielectric ceramics in the (Co1-xZnx)TiO3 (x=0-0.1) system
DOI:10.1016/j.jallcom.2011.11.083  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Huang, Cheng-Liang;Huang, Sem-Hung;
7:6:12:3     Phase Relation and Microwave Dielectric Properties of (Zn1-xCox)Ta2O6 System
DOI:10.1111/j.1551-2916.2009.03546.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:19  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;
7:6:12:4     Preparation and microwave dielectric properties of low-loss MgZrNb2O8 ceramics
DOI:10.1016/j.ceramint.2013.04.048  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:12  AU: Cheng, Ying;Zuo, Ruzhong;Lv, Yang;
7:6:12:5     High Dielectric Constant and Low-Loss Microwave Dielectric Ceramics Using (Zn(0.95)M2+(0.05))Ta2O6 (M2+=Mn, Mg, and Ni) Solid Solutions
DOI:10.1111/j.1551-2916.2010.03848.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;Tseng, Yu-Wei;Jiang, Chang-Yang;Huang, Guan-Sian;
7:6:12:6     Relationship Between Bond Ionicity, Lattice Energy, and Microwave Dielectric Properties of Zn(Ta1-xNbx)2O6 Ceramics
DOI:10.1111/j.1551-2916.2012.05231.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Xia, Wang-Suo;Li, Ling-Xia;Ning, Ping-Fan;Liao, Qing-Wei;
7:6:12:7     Influence of strontium substitution on the dielectric properties of Ca-(1 (-) x)SrxTi0.9Zr0.1O3 solid solutions
DOI:10.1016/j.matlet.2010.09.065  JN:MATERIALS LETTERS  PY:2011
  TC:9  AU: Lamrani, N.;Itaalit, B.;Marinel, S.;Aliouat, M.;
7:6:12:8     Phase evolution, bond valence and microwave characterization of (Zn1-xNix)Ta2O6 ceramics
DOI:10.1016/j.matlet.2011.08.106  JN:MATERIALS LETTERS  PY:2012
  TC:7  AU: Xia, Wang-Suo;Li, Ling-Xia;Ji, Lu-Jie;Zhang, Ping;Ning, Ping-Fan;Liao, Qing-Wei;
7:6:12:9     Enhanced microwave dielectric properties of ZnTa2O6 ceramics with Sb5+ ion substitution
DOI:10.1016/j.matlet.2014.03.090  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Xia, Wang-Suo;Zhang, Guo-Ying;Shi, Li-Wei;Zhang, Ming-Ming;
7:6:12:10     Low-loss microwave dielectrics using (Mg1-xZnx)(4)Nb2O9 (x=0.02-0.08) solid solutions
DOI:10.1016/j.jallcom.2010.10.201  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Huang, Cheng-Liang;Yang, Wen-Ruei;
7:6:12:11     Phase evolution and microwave dielectric properties of TiO2-modified (Mg0.95Co0.05)(2)TiO4 ceramics
DOI:10.1016/j.jallcom.2011.03.046  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;
7:6:13:1     New dielectric material system of Nd(Mg1/2Ti1/2)O-3-SrTiO3 in the microwave frequency range
DOI:10.1016/j.jallcom.2010.11.006  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Chen, Yuan-Bin;
7:6:13:2     Influence of Mg substitutions for Zn on the phase relation and microwave dielectric properties of (Zn1-xMgx)(3)Nb2O8 (x=0.02-1.0) system
DOI:10.1016/j.jallcom.2013.07.032  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Yang, Wen-Ruei;Pan, Chin-Cheng;Huang, Cheng-Liang;
7:6:13:3     Effect of CaTiO3 addition on microwave dielectric properties of NdNbO4 ceramics as multi-function material
DOI:10.1016/j.jallcom.2013.07.172  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Zhang, Ping;Song, Zhenkun;Wang, Yue;Han, Yemei;Dong, Helei;Li, Lingxia;
7:6:13:4     Microwave dielectric properties and crystal structures of 0.7CaTiO(3)-0.3[LaxNd(1-x)]AlO3 ceramics
DOI:10.1016/j.jallcom.2013.03.059  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Liang, Fei;Ni, Meng;Lu, Wenzhong;Fan, Guifen;
7:6:13:5     Effects of A-site La3+ substitution by Nd3+ on microwave dielectric properties and microstructure of CaTiO3-La(Ga0.5Al0.5)O-3 ceramics
DOI:10.1016/j.jallcom.2014.06.022  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Liang, Fei;Feng, Shaoshuai;Lu, Wenzhong;Wan, Qianxing;Fan, Guifen;
7:6:13:6     Effect of ZnO ratio on sintering behavior and microwave dielectric properties of BaO-ZnO-TiO2 ceramics
DOI:10.1016/j.jallcom.2010.06.146  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Yu, Shengquan;Tang, Bin;Zhang, Shuren;Zhou, Xiaohua;
7:6:13:7     Improvements in the sintering behavior and microwave dielectric properties of Mg4Nb2O9 by adding Fe2O3
DOI:10.1016/j.jallcom.2010.02.031  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Huang, Cheng-Liang;Yang, Wen-Ruei;Chen, Yu-Ruei;
7:6:13:8     Improved quality factor of NdNbO4 microwave dielectric ceramic by Mn2+ substitution
DOI:10.1016/j.jallcom.2013.09.023  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Song, Zhenkun;Zhang, Ping;Wang, Yue;Li, Lingxia;
7:6:13:9     Improvement in quality factor of (Zr0.8Sn0.2)TiO4 microwave ceramics by Mn4+ doping
DOI:10.1016/j.matlet.2011.02.076  JN:MATERIALS LETTERS  PY:2011
  TC:9  AU: Laishram, Radhapiyari;Thakur, O. P.;Bhattacharya, D. K.;
7:6:13:10     Effects of Sm substitution on microwave dielectric properties of Ba4La9.33(Ti0.95Zr0.05)(18)O-54 ceramics
DOI:10.1016/j.jallcom.2010.01.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Gao, Xufang;Qiu, Tai;
7:6:13:11     Effect of Zn2+Substitution on Sintering Behavior and Dielectric Properties of NdNbO4 Ceramics
DOI:10.1080/00150193.2010.484724  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Chen, Yuehua;Wang, Hong;Pang, Lixia;Zhou, Huanfu;Yao, Xi;
7:6:13:12     Effect of Bi2O3 additives on sintering and microwave dielectric behavior of La(Mg0.5Ti0.5)O-3 ceramics
DOI:10.1016/j.ceramint.2009.12.021  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:4  AU: Tay, Kok-Wan;Fu, Yen-Pei;Huang, Qi-Feng;Jang, Fan-Hao;
7:6:13:13     Microwave dielectric properties of x(Mg0.7Zn0.3)(0.95)Co0.05TiO3-(1-x)Ca0.8Sm0.4/3TiO3 ceramics with a zero temperature coefficient of resonant frequency
DOI:10.1016/j.jallcom.2010.07.181  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:4  AU: Chen, Yuan-Bin;
7:6:14:1     Piezoelectric Strontium Niobate and Calcium Niobate Ceramics with Super-High Curie Points
DOI:10.1111/j.1551-2916.2009.03587.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:23  AU: Ning, Huanpo;Yan, Haixue;Reece, Michael J.;
7:6:14:2     Anisotropic Thermal Diffusivity and Conductivity of La-Doped Strontium Niobate Sr2Nb2O7
DOI:10.1111/j.1551-2916.2009.03533.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:21  AU: Sparks, Taylor D.;Fuierer, Paul A.;Clarke, David R.;
7:6:14:3     Crystallization Atmosphere and Substrate Effects on the Phase and Texture of Chemical Solution Deposited Strontium Niobate Thin Films
DOI:10.1111/jace.12193  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Campion, Michael J.;Brown-Shaklee, Harlan J.;Rodriguez, Mark A.;Richardson, Jacob J.;Clem, Paul G.;Ihlefeld, Jon F.;
7:6:14:4     The Effect of Barium Substitution on the Ferroelectric Properties of Sr2Nb2O7 Ceramics
DOI:10.1111/jace.12121  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Gao, Zhipeng;Ning, Huanpo;Chen, Chen;Wilson, Rory;Shi, Baogui;Ye, Haitao;Yan, Haixue;Reece, Michael J.;
7:6:14:5     Strontium niobate high-k dielectrics: Film deposition and material properties
DOI:10.1016/j.actamat.2009.09.006  JN:ACTA MATERIALIA  PY:2010
  TC:7  AU: Hardy, A.;Van Elshocht, S.;Adelmann, C.;Kittl, J. A.;De Gendt, S.;Heyns, M.;D'Haen, J.;D'Olieslaeger, A.;Van Bael, M. K.;Van den Rul, H.;Mullens, J.;
7:6:14:6     Microstructure and electric properties of strontium niobate ceramics
DOI:10.1016/j.ceramint.2011.10.063  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Fu, Chunlin;Liu, Huijiang;Chen, Gang;Cai, Wei;Deng, Xiaoling;
7:6:14:7     Effect of donor dopants cerium and tungsten on the dielectric and electrical properties of high Curie point ferroelectric strontium niobate
DOI:10.1016/j.ceramint.2013.03.019  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Ning, Huanpo;Yan, Haixue;Gao, Zhipeng;Wei, Xiaoyong;Reece, Michael J.;
7:6:14:8     Effect of Ta Doping on the Microstructure, Dielectric and Ferroelectric Properties of Sr2Nb2O7 Ceramics
DOI:10.1080/00150193.2014.932629  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Xiang, Lian;Chen, Gang;Fu, Chunlin;Cai, Wei;Wang, Wei;Liu, Kaihua;
7:6:14:9     Structure, magnetism, specific heat, and dielectric properties of Eu2Ta2O7
DOI:10.1063/1.4902345  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kolodiazhnyi, T.;Sakurai, H.;Matsushita, Y.;
7:6:14:10     The Investigation of PMS-PNW-PZT Piezoelectric Ceramics
DOI:10.1080/00150191003750820  JN:FERROELECTRICS  PY:2010
  TC:3  AU: Zhang Dong;Ma Weibing;Sun Qingchi;Gao Hongye;Zhang Yong;
7:6:14:11     Microstructure and Electric Properties of Strontium Lanthanum Niobate Ceramics
DOI:10.1080/00150193.2012.707589  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Fu, Chunlin;Liu, Huijiang;Chen, Gang;Cai, Wei;Deng, Xiaoling;
7:6:14:12     Indium-Based Ultraviolet-Transparent Electroconductive Oxyfluoride InOF: Ambient-Pressure Synthesis and Unique Electronic Properties in Comparison with In2O3
DOI:10.1021/ja405889m  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2013
  TC:2  AU: Mori, Tatsuya;Kajihara, Koichi;Kanamura, Kiyoshi;Toda, Yoshitake;Hiramatsu, Hidenori;Hosono, Hideo;
7:6:14:13     Tunable white-light-emitting Sr2-xCaxNb2O7:Pr3+ phosphor by adjusting the concentration Of Ca2+ ion
DOI:10.1016/j.optmat2014.01.009  JN:OPTICAL MATERIALS  PY:2014
  TC:1  AU: Geng, Juan;Chen, Yonghu;Gu, Guangrui;Tian, Lianhua;
7:6:14:14     Comment on "The Effect of Barium Substitution on the Ferroelectric Properties of Sr2Nb2O7 Ceramics," J. Am. Ceram. Soc., 96 [4] 1163-70 (2013)
DOI:10.1111/jace.12651  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Atuchin, V. V.;
7:6:14:15     Microstructure and Dielectric Properties of Ta-doped La2Ti2O7 Ceramics
DOI:10.1080/10584587.2013.778733  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Chen, Gang;Fu, Chunlin;Peng, Xiaodong;Ran, Shaonian;Cai, Wei;Deng, Xiaoling;
7:6:15:1     Low-temperature sintering and dielectric properties of high-permittivity microwave (Ca, Nd)TiO3 ceramics
DOI:10.1016/j.jallcom.2011.08.005  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Zhang, Qi-long;Sun, Hui-ping;Yang, Hui;
7:6:15:2     Low-temperature sintering and microwave dielectric properties of ZnZrNb2O8 ceramics with BaCu(B2O5) addition
DOI:10.1016/j.ceramint.2014.04.146  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Tang, Xin;Yang, Hui;Zhang, Qi-long;Zhou, Jue-hui;
7:6:15:3     High-Q microwave dielectrics in low-temperature sintered (Zn1-xNix)(3)Nb2O8 ceramics
DOI:10.1016/j.jeurceramsoc.2013.08.038  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:10  AU: Huang, Cheng-Liang;Yang, Wen-Ruei;Yu, Pei-Ching;
7:6:15:4     Microwave dielectric properties of Ba3Ti4-x(Zn1/3Nb2/3)(x)Nb4O21 for low temperature co-fired ceramics
DOI:10.1016/j.jeurceramsoc.2010.09.018  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:20  AU: Zhang, Qi-Long;Zou, Dong;Yang, Hui;
7:6:15:5     A Low Sintering Temperature Low Loss Microwave Dielectric Material ZnZrNb2O8
DOI:10.1111/j.1551-2916.2012.05450.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Liao, Qingwei;Li, Lingxia;Ren, Xiang;Yu, Xiaoxu;Guo, Dong;Wang, Mingjing;
7:6:15:6     Microwave dielectric properties and low temperature sintering of the ZnO-V2O5 doped Ba3Ti2(Mg1/3Nb2/3)(2)Nb4O21 ceramics
DOI:10.1016/j.ceramint.2012.12.084  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Zhang, Chen;Zuo, Ruzhong;Sun, Qian;Hu, Zhongwen;Zhang, Jinjin;
7:6:15:7     Microwave dielectric properties and compatibility with silver of low-fired Ba5Nb4O15 ceramics by BaCu(B2O5) addition
DOI:10.1557/JMR.2010.0216  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:9  AU: Zhou, Huanfu;Wang, Hong;Zhang, Minghuia;Yang, Haibo;
7:6:15:8     Low-firing high permittivity Ca0.6Sm0.8/3TiO3-(Li0.5Nd0.5)TiO3 ceramics with BaCu(B2O5) addition
DOI:10.1016/j.ceramint.2013.05.028  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Chen, Guo-hua;Yuan, Chang-lai;Zhou, Chang-rong;Yang, Yun;
7:6:15:9     Low-Temperature Sintering Microwave Dielectrics Using CuO-Doped Zn(Nb0.95Ta0.05)(2)O-6 Ceramics
DOI:10.1111/j.1551-2916.2010.03786.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;Jiang, Chang-Yang;
7:6:15:10     Photophysical and Photocatalytic Properties of Zn3M2O8 (M = Nb, Ta)
DOI:10.1111/j.1551-2916.2011.04759.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Noh, Tae Hoon;Cho, In-Sun;Lee, Sangwook;Kim, Dong Wook;Park, Sangbaek;Seo, Se Won;Lee, Chan Woo;Hong, Kug Sun;
7:6:15:11     Low-fire processing of microwave BaTi4O9 dielectric with crystalline CuB2O4 and BaCuB2O5 additives
DOI:10.1016/j.ceramint.2012.12.011  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Chu, Yung-Ju;Jean, Jau-Ho;
7:6:15:12     Synthesis and characterization of Zn3Ta2O8 nanomaterials by hydrothermal method
DOI:10.1016/j.jallcom.2013.03.274  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Birdeanu, M.;Birdeanu, A. -V.;Gruia, A. S.;Fagadar-Cosma, E.;Avram, C. N.;
7:6:15:13     Effect of BaCu(B2O5) on the sintering temperature and microwave dielectric properties of Ba(Nd0 8Bi0 2)(2)Ti4O12 ceramics
DOI:10.1557/JMR.2010.0309  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:1  AU: Zeng, Yi;Wang, Hong;Zhou, Huanfu;
7:6:16:1     Temperature-Compensated LiMgPO(4): A New Glass-Free Low-Temperature Cofired Ceramic
DOI:10.1111/j.1551-2916.2010.03934.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:19  AU: Thomas, Dhanesh;Sebastian, Mailadil T.;
7:6:16:2     Novel Series of Low-Firing Microwave Dielectric Ceramics: (1-x)Li3Bi2P3O12-xTiO(2)
DOI:10.1111/j.1551-2916.2012.05424.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:1  AU: Liu, Xiaobin;Zhou, Huanfu;Liang, Fang;Chen, Xiuli;Wang, Wei;Wang, Cheng;He, Fen;
7:6:16:3     Effect of Zn2+ substitution on the microwave dielectric properties of LiMgPO4 and the development of a new temperature stable glass free LTCC
DOI:10.1016/j.jeurceramsoc.2012.01.031  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Thomas, Dhanesh;Sebastian, Mailadil T.;
7:6:16:4     Low-Temperature Sinterable (1-x) Ba-3(VO4)(2)-xLiMg(0.9)Zn(0.1)PO(4) Microwave Dielectric Ceramics
DOI:10.1111/jace.12613  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:5  AU: Lv, Yang;Zuo, Ruzhong;Cheng, Ying;Zhang, Chen;
7:6:16:5     Casting and characterization of LiMgPO4 glass free LTCC tape for microwave applications
DOI:10.1016/j.jeurceramsoc.2012.08.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Thomas, Dhanesh;Abhilash, Pulanchiyodan;Sebastian, Mailadil T.;
7:6:16:6     Facile Synthesis of "Quench-Free Glass" and Ceramic-Glass Composite for LTCC Applications
DOI:10.1111/jace.12209  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Abhilash, Pulanchiyodan;Thomas, Dhanesh;Surendran, Kuzhichalil P.;Sebastian, Mailadil T.;
7:6:16:7     Effect of isovalent substitutions on the microwave dielectric properties of Ca4La6(SiO4)(4)(PO4)(2)O-2 apatite
DOI:10.1016/j.jallcom.2012.08.085  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Thomas, Dhanesh;Abhilash, Pulanchiyodan;Sebastian, Mailadil T.;
7:6:16:8     Microwave Dielectric Properties of Ca2+xLa8-x(SiO4)(6-x)(PO4)(x)O-2 Solid Solution
DOI:10.1111/j.1551-2916.2011.04639.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Thomas, Dhanesh;Sebastian, Mailadil T.;
7:6:16:9     Effects of CaTiO3 and SrTiO3 Additions on the Microstructure and Microwave Dielectric Properties of Ultra-Low-Fire TeO2 Ceramics
DOI:10.1111/j.1551-2916.2010.03826.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Wang, Sea-Fue;Huang, Chi-Yuen;Liu, Yen-Ling;
7:6:16:10     Microwave Dielectric Properties of Ba-3(VO4)(2)-Mg2SiO4 Composite Ceramics
DOI:10.1111/j.1551-2916.2009.03429.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Meng, Siqin;Yue, Zhenxing;Zhuang, Hao;Zhao, Fei;Li, Longtu;
7:6:16:11     Microwave dielectric properties of low-temperature sinterable Ba-3(VO4)(2)-LiMgPO4 composite ceramics
DOI:10.1016/j.matlet.2014.05.144  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Dong, Z. W.;Zheng, Y.;Cheng, P.;Lv, X. P.;Zhou, W.;
7:6:16:12     Synthesis and microwave dielectric properties of Ba4Ti3P2O15 ceramics
DOI:10.1016/j.matchemphys.2009.08.037  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:4  AU: Zhou, Huanfu;Wang, Hong;Zhang, Minghui;Li, Kecheng;Yang, Haibo;
7:6:16:13     Densification, microstructure and microwave dielectric properties of ultra-low fire BaTe4O9-TiTe3O8 ceramic composites
DOI:10.1016/j.jeurceramsoc.2010.01.020  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:2  AU: Wang, Sea-Fue;Wang, Yuh-Ruey;Hsu, Yung-Fu;Tsai, Jung-Shiung;
7:6:17:1     A new temperature stable microwave dielectric ceramics: ZnTiNb2O8 sintered at low temperatures
DOI:10.1016/j.jallcom.2011.01.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:31  AU: Guo, Mei;Gong, Shuping;Dou, Gang;Zhou, Dongxiang;
7:6:17:2     Microwave dielectric properties of B2O3-doped ZnTiO3 ceramics made with sol-gel technique
DOI:10.1016/j.jallcom.2010.04.131  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:17  AU: Wu, S. P.;Luo, J. H.;Cao, S. X.;
7:6:17:3     Synthesis, characterization, and microwave dielectric properties of Mg4Nb2O9 ceramics produced through the aqueous sol-gel process
DOI:10.1016/j.jallcom.2010.10.191  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Wu, H. T.;Li, L. X.;Zou, Q.;Liao, Q. W.;Ning, P. F.;Zhang, P.;
7:6:17:4     Low Temperature Sintering and Microwave Dielectric Properties of B2O3-added LiAlSiO4 Ceramics
DOI:10.1111/j.1551-2916.2011.04619.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Kweon, Sang-Hyo;Joung, Mi-Ri;Kim, Jin-Seong;Kim, Bo-Yun;Nahm, Sahn;Paik, Jong-Hoo;Kim, Young-Sik;Sung, Tae-Hyun;
7:6:17:5     Effect of the B2O3 addition on the sintering behavior and microwave dielectric properties of Ba-3(VO4)(2)-Zn1.87SiO3.87 composite ceramics
DOI:10.1016/j.ceramint.2012.09.014  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Lv, Yang;Zuo, Ruzhong;
7:6:17:6     Low-temperature synthesis and characterization of complex perovskite (Ca-0.61, Nd-0.26)TiO3-(Nd-0.55, Li-0.35)TiO3 nanopowders and ceramics by sol-gel method
DOI:10.1016/j.jallcom.2010.08.140  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: Zhang, Qi-Long;Wu, Fei;Yang, Hui;Li, Jin-Feng;
7:6:17:7     The effect CuO additive on the microwave dielectric properties of Mg(Zr0.05Ti0.95)O-3 ceramics
DOI:10.1016/j.jallcom.2010.01.001  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Tseng, Ching-Fang;
7:6:17:8     Synthesis of MgTa2O6 nano-powders by citrate sol-gel method
DOI:10.1016/j.jallcom.2010.06.134  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Zhang, YingChun;Fu, BaoJian;Liu, YanHong;Wang, Xiu;Li, Tao;Yue, ZhenXing;
7:6:17:9     Effect of Bi2O3 Doping on the Sintering Temperature and Microwave Dielectric Properties of LiAlSiO4 Ceramics
DOI:10.1111/j.1551-2916.2012.05222.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Jeong, Byoung-Jik;Joung, Mi-Ri;Kweon, Sang-Hyo;Kim, Jin-Seong;Nahm, Sahn;Choi, Ji-Won;Hwang, Seong-Ju;
7:6:18:1     Enhancement microwave dielectric properties of La(Mg0.5Sn0.5)O-3 ceramics by substituting Mg2+ with Ni2+
DOI:10.1016/j.jallcom.2011.07.056  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Chen, Yih-Chien;Yang, Sheng-Kai;Chang, Kuang-Chiung;
7:6:18:2     New material properties and RF applications of xLa(Mg1/2Ti1/2)O-3-(1-x)(La-0.5)TiO3 ceramics
DOI:10.1016/j.jallcom.2010.02.158  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Chen, Yuan-Bin;
7:6:18:3     High-dielectric-constant and low-loss microwave dielectric in the (1-x)La(Mg0.5Ti0.5)O-3-x(Ca0.8Sr0.2)TiO3 solid solution system
DOI:10.1016/j.jallcom.2010.11.022  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Huang, Cheng-Liang;Chen, Jhih-Yong;
7:6:18:4     New material properties of xLa(Mg1/2Ti1/2)O-3-(1-x) (Na0.5Nd0.5)TiO3 ceramics at microwave frequencies
DOI:10.1016/j.jallcom.2010.03.239  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: Chen, Yuan-Bin;
7:6:18:5     New dielectric material system of xLa(Mg1/2Ti1/2)O-3-(1-x)SrTiO3 in the microwave frequencies range
DOI:10.1016/j.jallcom.2009.10.162  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:6  AU: Chen, Yuan-Bin;
7:6:18:6     Crystal structure and dielectric properties of La(Mg0.5Ti0.5)O-3-Ca0.8Sm0.4/3TiO3 solid solution system at microwave frequencies
DOI:10.1016/j.jallcom.2010.09.048  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Chen, Jhih-Yong;Huang, Cheng-Liang;
7:6:18:7     Anomalous dielectric nonlinearity and dielectric relaxation in xBST-(1-x) (LMT-LNT) ceramics
DOI:10.1007/s00339-011-6580-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:0  AU: Liu, Cheng;Liu, Peng;
7:6:18:8     Substituting La3+ with Sr2+ to improve microwave dielectric properties of La(Mg0.5Sn0.5)O-3 ceramics
DOI:10.1016/j.jallcom.2010.07.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:3  AU: Chen, Yih-Chien;Hsu, Wei-Yu;
7:6:18:9     New dielectric material system of xLa(Mg1/2Ti1/2)O-3-(1-x)Ca0.61Nd0.8/3TiO3 at microwave frequency
DOI:10.1016/j.jallcom.2010.04.132  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:2  AU: Chen, Yuan-Bin;
7:6:18:10     Doping and Atomic Site Substitution in the Dielectric Ceramics Ti(Al)O-2 Rutile and (1-x)Ca2/5Sm2/5TiO3-xLi(1/2)Sm(1/2)TiO(3) Perovskite
DOI:10.1111/j.1551-2916.2009.03318.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:2  AU: Yamashita, Toru;Barry, John;Taylor, Richard;
7:6:18:11     Dependence of dielectric properties on structural characteristics of (Zn(1/3)A(2/3))(0.5) (Ti1-xBx)(0.5)O-2 (A = Nb5+, Ta5+, B = Ge4+, Sn4+) ceramics at microwave frequencies
DOI:10.1016/j.jeurceramsoc.2009.05.042  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Kim, Eung Soo;Seo, Seock No;
7:6:18:12     New dielectric material system of xLa(Mg1/2Ti1/2)O-3-(1-x)Ca0.8Sr0.2TiO3 at microwave frequency
DOI:10.1016/j.jallcom.2010.11.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Chen, Yuan-Bin;
7:6:19:1     Crystal Structure and Microwave Dielectric Properties of LiRE9(SiO4)6O2 Ceramics (RE = La, Pr, Nd, Sm, Eu, Gd, and Er)
DOI:10.1111/jace.12215  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:5  AU: Manu, Kurusaroor Mana;Karthik, Chinnathambi;Leu, Lii-Cherng;Lazar, Kokken Anlin;Ubic, Rick;Sebastian, Mailadil Thomas;
7:6:19:2     Microwave Dielectric Properties of (Sr(1-x)A(x))2(Zn1-xBx)Si2O7 Ceramics (A = Ca, Ba and B = Co, Mg, Mn, Ni)
DOI:10.1111/j.1551-2916.2009.03370.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:25  AU: Joseph, Tony;Sebastian, Mailadil T.;
7:6:19:3     Effect of Ca2+ Substitution on the Structure, Microstructure, and Microwave Dielectric Properties of Sr2Al2SiO7 Ceramic
DOI:10.1111/jace.12598  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Manu, Kurusaroor Mana;Karthik, Chinnathambi;Ubic, Rick;Sebastian, Mailadil Thomas;
7:6:19:4     Effects of LiF addition on sintering behavior and microwave dielectric properties of (Mg0.95Zn0.05)(2)(Ti0.8Sn0.2)O-4 ceramics
DOI:10.1016/j.ceramint.2011.10.073  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Yao, G. G.;Liu, P.;
7:6:19:5     Low permittivity SrCuSi4O10-LMZBS glass composite for LTCC applications
DOI:10.1016/j.matlet.2010.10.062  JN:MATERIALS LETTERS  PY:2011
  TC:10  AU: Manu, K. M.;Anjana, P. S.;Sebastian, M. T.;
7:6:19:6     Temperature compensated Sr2Al2SiO7 ceramic for microwave applications
DOI:10.1016/j.matchemphys.2011.12.067  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:5  AU: Manu, Kurusaroor M.;Joseph, Tony;Sebastian, Mailadil T.;
7:6:19:7     Microwave dielectric properties of alkaline earth orthosilicates M2SiO4 (M=Ba, Sr, Ca)
DOI:10.1016/j.matlet.2010.11.063  JN:MATERIALS LETTERS  PY:2011
  TC:8  AU: Joseph, Tony;Sebastian, Mailadil Thomas;
7:6:19:8     Electrical and thermal properties of low permittivity Sr2Al2SiO7 ceramic filled HDPE composites
DOI:10.1016/j.ceramint.2012.11.090  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Manu, K. M.;Ananthakumar, S.;Sebastian, M. T.;
7:6:19:9     Microwave dielectric properties of the (1-x)Mg2TiO4-xCaTiO(3)-y wt.% ZnNb2O6 ceramics system
DOI:10.1016/j.ceramint.2011.01.015  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:5  AU: Zhu, Hui;Lu, Wen-Zhong;Lei, Wen;
7:6:19:10     Microwave dielectric and thermal properties of mixed rare earth ortho phosphate [REmixPO4]
DOI:10.1016/j.ceramint.2014.05.004  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Arun, Bahuleyan;Varghese, Jobin;Surendran, Kuzhichalil Peethambharan;Sebastian, Mailadil Thomas;
7:6:20:1     Fabrication of nanopowders by high energy ball milling and low temperature sintering of Mg2SiO4 microwave dielectrics
DOI:10.1016/j.jallcom.2011.10.051  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:12  AU: Cheng, Lin;Liu, Peng;Chen, XiaoMing;Niu, WenCheng;Yao, GuoGuang;Liu, Cheng;Zhao, XiaoGang;Liu, Qian;Zhang, HuaiWu;
7:6:20:2     Sinterability and microwave dielectric properties of nano structured 0.95MgTiO(3)-0.05CaTiO(3) synthesised by top down and bottom up approaches
DOI:10.1016/j.jallcom.2010.12.006  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Sanoj, M. A.;Reshmi, C. P.;Sreena, K. P.;Varma, Manoj Raama;
7:6:20:3     Microwave dielectric properties of AWO(4) (A = Ca, Ba, Sr) ceramics synthesized via high energy ball milling method
DOI:10.1016/j.jallcom.2013.06.133  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:10  AU: Cheng, Lin;Liu, Peng;Qu, Shi-Xian;Zhang, Huai-Wu;
7:6:20:4     Microwave dielectric characterization of the perovskite series A(1/2)Ln(1/2)TiO(3)-NaNbO3 (A = Na, Li; Ln = La,Nd, Sm)
DOI:10.1016/j.jallcom.2010.10.082  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Liang, Z.;Yuan, L. L.;Bian, J. J.;
7:6:20:5     Sintering behavior and microwave dielectric properties of nano zinc niobate powder
DOI:10.1016/j.ceramint.2014.07.019  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Bafrooei, Hadi Barzegar;Nassaj, Ehsan Taheri;Ebadzadeh, Touradj;Hu, Chunfeng;
7:6:20:6     Microwave dielectric properties of x(Mg0.7Zn0.3)(0.95)Co0.05TiO3-(1-x)Ca0.8Sr0.2TiO3 ceramics with a zero temperature coefficient of resonant frequency
DOI:10.1016/j.jallcom.2010.05.015  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Huang, Cheng-Liang;Lin, Shih-Hung;Liu, Shih-Sheng;Chen, Yuan-Bin;Wang, Sih-Yin;
7:6:21:1     Elucidating the dielectric properties of Mg2SnO4 ceramics at microwave frequency
DOI:10.1016/j.jallcom.2011.07.065  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:18  AU: Chen, Yih-Chien;Wang, Yen-Nien;Hsu, Chih-Hao;
7:6:21:2     Elucidating the microwave dielectric properties of (Mg(1-x)Znx)(2)SnO4 ceramics
DOI:10.1016/j.jallcom.2012.03.015  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Chen, Yih-Chien;
7:6:21:3     Synthesis, phase structure and dielectric property of the ZnO-MgO-SnO2 ceramics
DOI:10.1016/j.jallcom.2013.01.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Liu, Xiangchun;
7:6:21:4     Enhancement microwave dielectric properties of Mg2SnO4 ceramics by substituting Mg2+ with Ni2+
DOI:10.1016/j.matchemphys.2012.01.102  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:11  AU: Chen, Yih-Chien;Wang, Yen-Nien;Hsu, Chih-Hao;
7:6:21:5     Dielectric properties of magnesium oxide at microwave frequency
DOI:10.1016/j.jallcom.2010.05.114  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Chen, Jhih-Yong;Hsu, Wei-Hung;Huang, Cheng-Liang;
7:6:21:6     Mg-substituted ZnNb2O6-TiO2 composite ceramics for RF/microwaves ceramic capacitors
DOI:10.1016/j.jallcom.2011.05.079  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:1  AU: Sp, Wu;Jh, Luo;
7:6:21:7     Microwave dielectric properties of La1-xBix(Mg0.5Sn0.5)O-3 ceramics
DOI:10.1016/j.matchemphys.2011.05.065  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:7  AU: Chen, Yih-Chien;Lee, Wei-Cheng;
7:6:21:8     Dielectric properties of CuO-doped La2.98/3Ba0.01(Mg0.5Sn0.5)O-3 ceramics at microwave frequency
DOI:10.1016/j.ceramint.2010.08.011  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:7  AU: Chen, Yih-Chien;Hsu, Wei-Yu;
7:6:21:9     Improvement microwave dielectric properties of Zn2SnO4 ceramics by substituting Sn4+ with Ti4+
DOI:10.1016/j.ceramint.2014.03.006  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Chen, Yih-Chien;Liou, Jhe-Ming;Weng, Min-Zhe;You, Hong-Mine;Chang, Kuang-Chiung;
7:6:21:10     Microwave dielectric properties of ZnO-B2O3-SiO2-doped Zn2SnO4 ceramics for application in triple bands inverted-U shaped monopole antenna
DOI:10.1016/j.jallcom.2014.07.049  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Chen, Yih-Chien;You, Hong-Mine;
7:6:22:1     Synthesis, characterization and thermal stability of a crystalline niobium oxysulfate
DOI:10.1016/j.jallcom.2012.01.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:1  AU: Wang, Qi;Jiang, Heng;Gong, Hong;Chu, Gang;Lin, Cuihua;Dong, Xiaole;
7:6:22:2     Low-temperature sintering of temperature-stable LaNbO4 microwave dielectric ceramics
DOI:10.1016/j.materresbull.2009.09.008  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:19  AU: Lee, Hang-Won;Park, Jeong-Hyun;Nahm, Sahn;Kim, Dong-Wan;Park, Jae-Gwan;
7:6:22:3     Aqueous Processing and Effects of V2O5 on Microwave Dielectric Properties of Multilayer Li1.075Nb0.625Ti0.45O3 Ceramics
DOI:10.1007/s13391-013-2148-9  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:0  AU: Li, Shaochun;Geng, Yongjuan;Zhao, Tiejun;Jin, Zuquan;Zhang, Peng;
7:6:22:4     Crystal structure and microwave dielectric properties of (Zn1-xCox)TiNb2O8 ceramics
DOI:10.1016/j.jallcom.2012.11.072  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Huan, Zhengli;Sun, Qingchi;Ma, Weibing;Wang, Lijing;Xiao, Fei;Chen, Tiankai;
7:6:22:5     Low-firable high-K dielectric in the Zr-x( Zn1/3Nb2/3)(1-x)TiO4 ceramic system
DOI:10.1016/j.jallcom.2011.05.041  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Huang, Cheng-Liang;Chien, Yu-Hua;
7:6:22:6     Crystal structure and microwave dielectric properties of ZnTi(Nb1-xTax)(2)O-8 ceramics
DOI:10.1016/j.jallcom.2011.03.178  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Park, Jeong-Hyun;Choi, Young-Jin;Nahm, Sahn;Park, Jae-Gwan;
7:6:22:7     Microwave dielectric properties of a new ceramic system NdNbO4 with CaF2 addition
DOI:10.1016/j.jallcom.2012.04.090  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:11  AU: Zhang, Ping;Wang, Tao;Xia, Wangsuo;Li, Lingxia;
7:6:22:8     Crystal structure and microwave dielectric properties of (1-x)ZnTa2O6-xTiO(2) ceramics
DOI:10.1016/j.jallcom.2012.05.065  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Park, Jeong-Hyun;Nahm, Sahn;Park, Jae-Gwan;
7:6:22:9     Correlation of crystal structure and microwave dielectric properties for Zn(Ti1-xSnx)Nb2O8 ceramics
DOI:10.1016/j.mseb.2010.08.009  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:8  AU: Liao, Qingwei;Li, Lingxia;Zhang, Ping;Cao, Lifeng;Han, Yemei;
7:6:23:1     Low-Loss Microwave Dielectrics in the Spinel-Structured (Mg1-xNix)Al2O4 Solid Solutions
DOI:10.1111/j.1551-2916.2010.03690.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:22  AU: Huang, Cheng-Liang;Tai, Chen-Yi;Huang, Chi-Yuen;Chien, Yu-Hua;
7:6:23:2     Microwave dielectric properties of Li(Mg1-xNix)PO4 ceramics for LTCC applications
DOI:10.1016/j.ceramint.2014.04.160  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Dong, Z. W.;Zheng, Y.;Cheng, P.;Lv, X. P.;Zhou, W.;
7:6:23:3     Broadband dielectric characterization of TiO2 ceramics sintered through microwave and conventional processes
DOI:10.1016/j.ceramint.2012.06.025  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:16  AU: Marinel, Sylvain;Choi, Doo Hyun;Heuguet, Romain;Agrawal, Dinesh;Lanagan, Michael;
7:6:23:4     Preparation and microwave dielectric properties of Li(Mg1-xCox)PO4 ceramics for low-temperature cofired ceramic applications
DOI:10.1016/j.ceramint.2014.06.081  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Dong, Z. W.;Zheng, Y.;Cheng, P.;Lv, X. P.;Zhang, W. Y.;Zhou, W.;Xiong, W. H.;
7:6:23:5     High-Q microwave dielectrics in the (Mg1-xZnx)Al2O4 (x=0-0.1) system
DOI:10.1016/j.jallcom.2010.12.202  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Huang, Cheng-Liang;Chien, Yu-Hua;Tai, Chen-Yi;Huang, Chi-Yuen;
7:6:23:6     Microwave dielectric properties of SnO2-doped CaSiO3 ceramics
DOI:10.1016/j.ceramint.2012.08.066  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:8  AU: Ma, Qing;Wu, Songping;Jiang, Chan;Li, Jianhui;
7:6:23:7     Microwave dielectric properties of MgAl2O4-CoAl2O4 spinel compounds prepared by reaction-sintering process
DOI:10.1016/j.mseb.2012.05.023  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:8  AU: Tsai, Wen-Chou;Liou, Ying-Hung;Liou, Yi-Cheng;
7:6:23:8     Dielectric characteristics of (Mg1/2Zn1/2)Al2O4 ceramics at microwave frequencies
DOI:10.1016/j.jallcom.2010.04.118  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:2  AU: Tseng, Ching-Fang;Tung, Hsin-Han;Hsu, Chen-Kang;Yu, Cheng-Chi;Hsu, Cheng-Hsing;
7:6:23:9     Dielectric Properties and Characterisation of Titanium Dioxide Obtained by Different Chemistry Methods
DOI:10.1155/2014/124814  JN:JOURNAL OF NANOMATERIALS  PY:2014
  TC:1  AU: Wypych, Aleksandra;Bobowska, Izabela;Tracz, Milena;Opasinska, Agnieszka;Kadlubowski, Slawomir;Krzywania-Kaliszewska, Alicja;Grobelny, Jaroslaw;Wojciechowski, Piotr;
7:6:23:10     Dielectric characteristics of (Mg1/2Co1/2)Al2O4 ceramics at microwave frequencies
DOI:10.1016/j.matchemphys.2011.07.081  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:0  AU: Hsu, Cheng-Hsing;Tung, Hsin-Han;Hsu, Chen-Kang;
7:6:24:1     Low-temperature sintered Zn2SiO4-CaTiO3 ceramics with near-zero temperature coefficient of resonant frequency
DOI:10.1016/j.jallcom.2011.10.089  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:8  AU: Dou, Gang;Zhou, Dongxiang;Guo, Mei;Gong, Shuping;
7:6:24:2     Microwave dielectric properties of (1-x)CeO2-xRE(2)O(3) (RE = La, Nd, Sm, Eu, Gd, Dy, Er, Tm, Yb and Y) (0 <= x <= 1) ceramics
DOI:10.1016/j.jallcom.2009.09.057  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:12  AU: Anjana, Prabhakaran Sreekumari;Joseph, Tony;Sebastian, Mailadil Thomas;
7:6:24:3     Dielectric properties and crystal structure of (Mg0.9Zn0.05Co0.05)(4)(Nb1-xTax)(2)O-9 ceramics
DOI:10.1016/j.jallcom.2012.06.066  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:0  AU: Chen, Yuan-Bin;
7:6:24:4     Low temperature sintering and microwave dielectric properties of (Mg0.7Zn0.3)(0.95)Co0.05TiO3 ceramics with BaCu(B2O5) additions
DOI:10.1016/j.jallcom.2011.03.172  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Chen, Yuan-Bin;
7:6:24:5     Effect of sintering aid on microwave dielectric properties of Mg(Zr0.05Ti0.95)O-3 ceramics
DOI:10.1016/j.jallcom.2009.10.154  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:11  AU: Tseng, Ching-Fang;Tang, Hui-Ju;
7:6:24:6     Low temperature sintering and microwave dielectric properties of ZnTiNb2O8 ceramics with BaCu(B2O5) additions
DOI:10.1016/j.matchemphys.2011.08.010  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:5  AU: Zhou, Dongxiang;Dou, Gang;Guo, Mei;Gong, Shuping;
7:6:24:7     Low temperature sintering of barium titanate based ceramics with high dielectric constant for LTCC applications
DOI:10.1016/j.jeurceramsoc.2010.10.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:10  AU: Naghib-zadeh, Hamid;Glitzky, Carsten;Oesterle, Werner;Rabe, Torsten;
7:6:24:8     Low temperature processing of (Zr0.8Sn0.2)TiO4 ceramics with improved Q factor
DOI:10.1016/j.jallcom.2011.06.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Pamu, D.;Rao, G. Lakshmi Narayana;Raju, K. C. James;
7:6:25:1     Structural and electrical properties of Gd(Ni1/2Zr1/2)O-3
DOI:10.1016/j.jallcom.2011.09.011  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:10  AU: Kumar, Nishant;Dutta, Alo;Prasad, S.;Sinha, T. P.;
7:6:25:2     Dielectric relaxation and conduction mechanism in Ba2GdTaO6
DOI:10.1016/j.jallcom.2012.11.027  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:11  AU: Ghosh, Binita;Dutta, Alo;Sinha, T. P.;
7:6:25:3     Vibrational Spectroscopy of Ca(2)LnTaO(6) (Ln = lanthanides, Y, and In) and Ca2InNbO6 Double Perovskites
DOI:10.1021/cm1027964  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:14  AU: Dias, Anderson;Lage, Marcio M.;Khalam, L. Abdul;Sebastian, Mailadil T.;Moreira, Roberto L.;
7:6:25:4     Dielectric Relaxation and Collective Vibrational Modes of Double-Perovskites A(2)SmTaO(6) (A = Ba, Sr and Ca)
DOI:10.1111/jace.12988  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Ghosh, Binita;Halder, Saswata;Sinha, Tripurari Prasad;
7:6:25:5     Electronic structure and electrical properties of Ba2LaTaO6
DOI:10.1016/j.jallcom.2014.01.047  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Kumari, Premlata;Dutta, Alo;Shannigrahi, Santiranjan;Prasad, S.;Sinha, T. P.;
7:6:25:6     Dielectric Relaxation and Electronic Structure of Double Perovskite Ca2AlNbO6
DOI:10.1080/10584587.2010.488569  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:5  AU: Dutta, Alo;Sinha, T. P.;
7:6:25:7     Combined XPS and first principles study of double-perovskite Ca2GdTaO6
DOI:10.1007/s10853-013-7765-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:3  AU: Ghosh, Binita;Dutta, Alo;Shannigrahi, Santiranjan;Sinha, T. P.;
7:6:25:8     Vibrational modes and electrical transport in Sr2GdTaO6
DOI:10.1016/j.matchemphys.2013.07.032  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:3  AU: Ghosh, Binita;Dutta, Alo;Sinha, T. P.;
7:6:25:9     Synthesis and investigation of luminescence properties of Eu3+-doped cubic perovskite Ba3Y2WO9
DOI:10.1016/j.optmat.2013.04.008  JN:OPTICAL MATERIALS  PY:2013
  TC:6  AU: Dong, Xiaorui;Fu, Zuoling;Wang, Qian;Sun, Guijuan;Dai, Zhenwen;
7:6:25:10     Impedance spectroscopy analysis of complex perovskite Ho(Ni1/2Zr1/2)O-3
DOI:10.1016/j.matchemphys.2013.01.003  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:1  AU: Kumar, Nishant;Dutta, Alo;Prasad, S.;Sinha, T. P.;
7:6:25:11     Electrical properties of complex perovskite samarium nickel titanate
DOI:10.1007/s13391-013-2187-2  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:0  AU: Kumar, Nishant;Dutta, Alo;Prasad, S.;Sinha, T. P.;
7:6:25:12     Dielectric relaxation and conduction mechanism in LaNi3/4M1/4O3 (M = Mo, W) at low temperature
DOI:10.1016/j.jallcom.2010.10.012  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Dutta, Alo;Sinha, T. P.;
7:6:26:1     Improved microwave dielectric properties of Nd(Mg0.5Sn0.5)O-3 ceramics by substituting Mg2+ with Zn2+
DOI:10.1016/j.ceramint.2012.03.047  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Chen, Yih-Chien;Chang, Kuang-Chiung;Yao, Shi-Li;
7:6:26:2     Effect of sintering temperature and time on microwave dielectric properties of Nd(Mg0.5Sn0.5)O-3 ceramics
DOI:10.1016/j.matchemphys.2011.03.072  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:19  AU: Chen, Yih-Chien;Tsai, Ren-Jie;
7:6:26:3     A hybrid dielectric resonator antenna based upon novel complex perovskite microwave ceramic
DOI:10.1016/j.ceramint.2013.03.074  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Chen, Yih-Chien;Chang, Kuang-Chiung;Tsai, Da-Yeh;
7:6:26:4     Effect of Sr substitution on microwave dielectric properties of Nd(Mg0.5Sn0.5)O-3 ceramics
DOI:10.1016/j.ceramint.2012.07.094  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Chen, Yih-Chien;Wu, Chung-Yen;
7:6:26:5     Enhancing quality factor of Nd(Mg0.5Sn0.5)O-3 ceramics by substituting Nd3+ for Yb3+
DOI:10.1016/j.ceramint.2014.05.067  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Chen, Yih-Chien;Li, Chih-Hung;Liu, Hua-Xian;Liu, Yen-Cheng;
7:6:26:6     Microwave dielectric properties and microstructures of Nd(Mg0.5Sn0.5-xTix)O-3 ceramics
DOI:10.1016/j.ceramint.2011.11.069  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Chen, Yih-Chien;Tsai, Ren-Jie;Wu, Chung-Yen;
7:6:26:7     Microwave dielectric properties of neodymium tin oxide
DOI:10.1016/j.ceramint.2013.10.062  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Wang, Yen-Nien;Chen, Yih-Chien;Yao, Shi-Li;Wu, Chung-Yen;
7:6:26:8     Dielectric Properties of B2O3-Doped Nd(Mg0.5Sn0.5)O3 Ceramics at Microwave Frequencies
DOI:10.1080/00150191003799322  JN:FERROELECTRICS  PY:2010
  TC:13  AU: Chen, Yih-Chien;Tsai, Ren-Jie;Wang, Yen-Nien;
7:6:26:9     Phases and Microwave Dielectric Properties of CuO-Doped Nd(Mg0.5Sn0.5)O-3 Ceramics
DOI:10.1080/00150193.2012.740280  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Chen, Yung-Yu;Chen, Kuei-Chien;Chen, Yih-Chien;
7:6:26:10     Enhancement microwave dielectric properties of La(Mg0.5Sn0.5)O-3 ceramics by Substituting Mg2+ for Co2+
DOI:10.1016/j.matchemphys.2011.09.013  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:4  AU: Chen, Yih-Chien;Chen, Ming-De;Yeh, Jen-Kai;
7:6:27:1     Microwave dielectric in the Sm(Co1/2Ti1/2)O-3-CaTiO3 ceramic system with near-zero temperature coefficient with resonant frequency
DOI:10.1016/j.matlet.2009.11.028  JN:MATERIALS LETTERS  PY:2010
  TC:18  AU: Hsu, Cheng-Hsing;Ho, Hsuan-An;
7:6:27:2     Relationships between Zr substitution for Ti and microwave dielectric properties in Mg(ZrxTi1-x)O-3 ceramics
DOI:10.1016/j.jallcom.2011.07.024  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Tseng, Ching-Fang;
7:6:27:3     Influence of Nonstoichiometry on Extrinsic Electrical Conduction and Microwave Dielectric Loss of BaCo1/3Nb2/3O3 Ceramics
DOI:10.1111/j.1551-2916.2010.03999.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:16  AU: Li, Ming;Feteira, Antonio;Mirsaneh, Mehdi;Lee, Soonil;Lanagan, Michael T.;Randall, Clive A.;Sinclair, Derek C.;
7:6:27:4     Preparation, structural and microwave dielectric properties of CaLa4(ZrxTi1-x)(4)O-15 ceramics
DOI:10.1016/j.jallcom.2013.10.168  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Hsu, Cheng-Hsing;Huang, Ci-Jie;
7:6:27:5     Microwave dielectric properties of high-Q Mg(Sn (x) Ti1-x )O-3 ceramics
DOI:10.1007/s13391-013-2214-3  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:5  AU: Gong, Zhijie;Wang, Zhefei;Wang, Lixi;Fu, Zhenxiao;Han, Wei;Zhang, Qitu;
7:6:27:6     Low loss and middle permittivity of (1-x) Ca4La2Ti5O17-xNdAlO(3) dielectric resonators with near-zero temperature coefficient of the resonant frequency
DOI:10.1007/s10853-011-6039-x  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:3  AU: Di, Jie-chang;Chen, Guo-hua;Hou, Mei-zhen;Yuan, Chang-lai;Xu, Hua-rui;Zhou, Chang-rong;
7:6:27:7     Effects of Sintering Process on Microstructure and Microwave Dielectric Properties of Ba(Co1/3Nb2/3)O-3 Ceramics
DOI:10.1007/s13391-014-3350-0  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:0  AU: Wang, Zhefei;Wu, Jiajia;Wang, Lixi;Fu, Zhenxiao;Zhang, Qitu;
7:6:27:8     Microwave Dielectric Properties of Co2La4Ti3Si4O22 Ceramics
DOI:10.1111/j.1551-2916.2010.03639.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Chameswary, Janardhanan;Thomas, Sherin;Sebastian, Mailadil Thomas;
7:6:27:9     Microwave dielectric properties of (Ca0.8Sr0.2)(SnxTi1-x)O-3 ceramics
DOI:10.1016/j.mseb.2012.12.010  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:0  AU: Hsu, Cheng-Hsing;Chang, Chia-Hao;
7:6:27:10     Microwave dielectric properties of new (Ca0.8Sr0.2)SnO3 ceramics
DOI:10.1016/j.ceramint.2012.01.070  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Hsu, Cheng-Hsing;Chang, Chia-Hao;
7:6:27:11     Low-temperature sintered ZnNb2O6-CaTiO3 ceramics with near-zero tau(f)
DOI:10.1016/j.matchemphys.2014.06.013  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:1  AU: Guo, Mei;Li, Yuxia;Dou, Gang;Gong, Shuping;
7:6:27:12     Effect of Zr substitution on the microwave dielectric properties of (Ca0.8Sr0.2)TiO3 ceramics
DOI:10.1016/j.materresbull.2013.10.034  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Hsu, Cheng-Hsing;Chang, Chia-Hao;
7:6:28:1     A new temperature stable microwave dielectric with low-firing temperature in Bi2MoO6-TiO2 system
DOI:10.1016/j.jallcom.2009.12.168  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:15  AU: Pang, Li-Xia;Wang, Hong;Zhou, Di;Yao, Xi;
7:6:28:2     Microwave dielectric properties of (1-x)ZnMoO4-xTiO(2) composite ceramics
DOI:10.1016/j.jallcom.2011.02.155  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:16  AU: Guo, Jing;Zhou, Di;Wang, Hong;Yao, Xi;
7:6:28:3     Microstructure and properties evaluation of TiO2 ceramics with multi-oxides glass additions
DOI:10.1016/j.ceramint.2013.09.049  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Houng, Boen;Wu, Shih-Jeh Jimmy;Lu, Sue Han;Chien, Wei Chueh;
7:6:28:4     Microwave and Infrared Dielectric Response of Temperature Stable (1-x)BaMoO4-xTiO2 Composite Ceramics
DOI:10.1111/j.1551-2916.2011.04760.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Guo, Jing;Zhou, Di;Wang, Hong;Chen, Yuehua;Zeng, Yi;Xiang, Feng;Wu, Ying;Yao, Xi;
7:6:28:5     Microwave Dielectric Ceramics Li2MO4-TiO2 (M=Mo, W) with Low Sintering Temperatures
DOI:10.1111/jace.12821  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Guo, Jing;Zhou, Di;Zou, Shen-Li;Wang, Hong;Pang, Li-Xia;Yao, Xi;
7:6:28:6     Abnormal phase transition in BiNbO4 powders prepared by a citrate method
DOI:10.1016/j.jallcom.2011.08.077  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Zhai, Hai-Fa;Qian, Xu;Kong, Ji-Zhou;Li, Ai-Dong;Gong, You-Pin;Li, Hui;Wu, Di;
7:6:28:7     Dielectric Properties of Lithium Molybdate Ceramic Fabricated at Room Temperature
DOI:10.1111/jace.13277  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Kahari, Hanna;Teirikangas, Merja;Juuti, Jari;Jantunen, Heli;
7:6:28:8     Microstructure and microwave dielectric properties of (1-x)Ca0.6La0.267TiO3-xCa(Mg1/3Nb2/3)O-3 ceramics
DOI:10.1016/j.ceramint.2012.01.037  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Xu, Peng;Yang, Jian;Li, Jiamao;Qiu, Tai;
7:6:29:1     High-Q microwave dielectrics in the (Mg1-xZnx)(4)Ta2O9 ceramics
DOI:10.1016/j.jallcom.2013.12.172  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Huang, Cheng-Liang;Chu, Chao-Hsien;Liu, Fan-Shuo;Yu, Pei-Ching;
7:6:29:2     Improved High-Q Microwave Dielectric Ceramics in CuO-Doped BaTi4O9-BaZn2Ti4O11 System
DOI:10.1111/j.1551-2916.2012.05086.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Yu, Sheng Quan;Tang, Bin;Zhang, Xiao;Zhang, Shu Ren;Zhou, Xiao Hua;
7:6:29:3     The influence of Cu substitution on the microwave dielectric properties of BaZn2Ti4O11 ceramics
DOI:10.1016/j.jallcom.2012.11.003  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Tang, Bin;Yu, Shengquan;Chen, Hetuo;Zhang, Shuren;Zhou, Xiaohua;
7:6:29:4     Phase Composition and Microwave Dielectric Properties of ZnAl2O4-Co2TiO4 Low-Permittivity Ceramics with High Quality Factor
DOI:10.1111/j.1551-2916.2010.04247.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:14  AU: Lei, Wen;Lu, Wen-Zhong;Wang, Xiao-Hong;Liang, Fei;Wang, Jun;
7:6:29:5     Significant enhancement in quality factor of Zn2TiO4 with Cu-substitution
DOI:10.1016/j.mseb.2011.01.013  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:6  AU: Butee, Sandeep;Kulkarni, Ajit R.;Prakash, Om;Aiyar, R. P. R. C.;Wattamwar, Ishan;Bais, Durgesh;Sudheendran, K.;Raju, K. C. James;
7:6:29:6     ZnAl2O4 and (0.79)ZnAl2O4-(0.21)Mn2TiO4 Microwave Dielectric Ceramics Prepared by Hot Pressing and Spark Plasma Sintering
DOI:10.1111/j.1551-2916.2011.04907.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Lorite, Israel;Angel Rodriguez, Miguel;Azough, Feridoon;Freer, Robert;Francisco Fernandez, Jose;
7:6:29:7     Effect of small amount of cobalt substitution on structure and microwave dielectric properties of barium magnesium niobate ceramics
DOI:10.1016/j.jeurceramsoc.2012.03.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Chen, Ching-Tien;Huang, Chi-Yuen;Lin, Hong-Jin;Lee, Chun-Te;
7:6:29:8     Microstructure and Microwave Properties for Barium Magnesium Niobate
DOI:10.1080/10584587.2013.786936  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:1  AU: Shan, Lianwei;Li, Wei;Dong, Limin;Zhang, Xianyou;
7:6:29:9     Microwave dielectric properties of Ca0.4-xMgxSm0.4TiO3 ceramics
DOI:10.1016/j.jallcom.2013.08.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Hsu, Cheng-Hsing;Tsai, Ping-Sung;Tseng, Ching-Fang;Hung, Shao-Hsiang;Huang, I. Chien;
7:6:30:1     High-Permittivity and Low-Loss Microwave Dielectric Ceramics Based on (x)RE(Zn1/2Ti1/2)O-3-(1-x)CaTiO3 (RE=La and Nd)
DOI:10.1111/j.1551-2916.2010.04173.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:12  AU: Feteira, Antonio;Iddles, David;Price, Tim;Muir, Duncan;Reaney, Ian M.;
7:6:30:2     Effect of bond valence on microwave dielectric properties of (1-x)CaTiO3-x(Li0.5La0.5)TiO3 ceramics
DOI:10.1016/j.materresbull.2012.05.024  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:15  AU: Li, Jiamao;Han, Yuxian;Qiu, Tai;Jin, Chuangui;
7:6:30:3     Characterization and microwave dielectric properties of TiO2-modified 0.65CaTiO(3)-0.35Sm(0.9)Nd(0.1)AlO(3) ceramics
DOI:10.1016/j.materresbull.2013.11.026  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Yang, Xinye;Wang, Xiaohui;Gong, Huiling;Li, Longtu;
7:6:30:4     Probing structural changes in Ca(1-x)Nd2x/3TiO3 ceramics by Raman spectroscopy
DOI:10.1063/1.4789601  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Lowndes, Robert;Deluca, Marco;Azough, Feridoon;Freer, Robert;
7:6:30:5     Effect of Grain Size on the Microwave Dielectric Characteristics of High-Energy Ball-Milled Zinc Magnesium Titanate Ceramics
DOI:10.1111/j.1551-2916.2012.05128.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:10  AU: Kiran, S. Roopas;Sreenivasulu, G.;Murthy, V. R. K.;Subramanian, V.;Murty, B. S.;
7:6:30:6     Structures and microwave dielectric properties of Ca(1-x)Nd2x/3TiO3 ceramics
DOI:10.1016/j.jeurceramsoc.2012.05.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:10  AU: Lowndes, R.;Azough, F.;Cernik, R.;Freer, R.;
7:6:30:7     Structure and microwave dielectric characteristics of lithium-excess Ca0.6Nd0.8/3TiO3/(Li0.5Nd0.5)TiO3 ceramics
DOI:10.1016/j.materresbull.2013.07.025  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:4  AU: Zhou, Changrong;Chen, Guohua;Cen, Zhenyong;Yuan, Changlai;Yang, Yun;Li, Weizhou;
7:6:30:8     Origin of improvement of Q based on high symmetry accompanying Si-Al disordering in cordierite millimeter-wave ceramics
DOI:10.1016/j.jeurceramsoc.2009.05.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Ohsato, H.;Kagomiya, I.;Terada, M.;Kakimoto, K.;
7:6:30:9     Effect of sintering temperature on dielectric properties, vibrational modes and crystal structures of Ba[(Ni0.7Zn0.3)(1/3)Nb-2/3]O-3 ceramics
DOI:10.1007/s10853-012-6431-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:3  AU: Diao, Chuanling;Shi, Feng;
7:6:31:1     Impedance spectroscopy study of Na2Nb4O11 ceramic matrix by the addition of Bi2O3
DOI:10.1016/j.jallcom.2013.08.208  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Oliveira, R. G. M.;Romeu, M. C.;Costa, M. M.;Silva, P. M. O.;Filho, J. M. S.;Junqueira, C. C. M.;Sombra, A. S. B.;
7:6:31:2     Three Layer Perovskite-Like Structured Pr3Ti2TaO11 Ferroelectrics with Super-High Curie Point
DOI:10.1111/jace.13189  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Chen, Chen;Jiang, Qinghui;Wei, Xiaoyong;Abrahams, Isaac;Yan, Haixue;Reece, Mike J.;
7:6:31:3     Microwave dielectric properties and microstructures of Nb2O5-Zn0.95Mg0.05TiO3+0.25TiO(2) ceramics with Bi2O3 addition
DOI:10.1016/j.jeurceramsoc.2009.09.028  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Lee, Ying-Chieh;Chiang, Cheng-Su;Huang, Yen-Lin;
7:6:31:4     Structural characterisation of ferroelectric Ag2Nb4O11 and dielectric Ag2Ta4O11
DOI:10.1039/c0jm02540b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:15  AU: Maso, Nahum;Woodward, David I.;Thomas, Pam A.;Varez, Alejandro;West, Anthony R.;
7:6:31:5     Polymorphism, structural characterisation and electrical properties of Na2Nb4O11
DOI:10.1039/c1jm11848j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:11  AU: Maso, Nahum;Woodward, David I.;Varez, Alejandro;West, Anthony R.;
7:6:31:6     A new family of ferroelectric materials: Me2Nb4O11 (Me = Na and Ag)
DOI:10.1039/b921115b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:13  AU: Maso, Nahum;West, Anthony R.;
7:6:31:7     Ferroelectricity in the xAg(2)Nb(4)O(11)-(1-x)Na2Nb4O11 solid solution
DOI:10.1063/1.3573791  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Woodward, David I.;Thomas, Pam A.;
7:6:31:8     Luminescence and second harmonic generation in Eu3+/Eu2+ embedded B2O3: LiNbO3 non-linear glass-ceramics
DOI:10.1016/j.optmat.2011.06.002  JN:OPTICAL MATERIALS  PY:2011
  TC:5  AU: Yadav, T. K.;Singh, A. K.;Kumar, K.;Yadav, R. A.;
7:6:32:1     Microwave dielectric properties of new SrLa4-xNdxTi5O17 ceramics
DOI:10.1016/j.materresbull.2011.11.060  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:6  AU: Manan, Abdul;Iqbal, Yaseen;
7:6:32:2     Preparation and Characterization of New Sr5-x LaxNb4-x Ti1+xO17 Microwave Dielectric Ceramics
DOI:10.1007/s11664-012-2080-z  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:9  AU: Iqbal, Yaseen;Manan, Abdul;
7:6:32:3     Low loss Sr1-xCaxLa4Ti5O17 microwave dielectric ceramics
DOI:10.1016/j.materresbull.2011.03.002  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:24  AU: Iqbal, Yaseen;Manan, Abdul;Reaney, I. M.;
7:6:32:4     Preparation, Characterization, and Microwave Dielectric Properties of Sr2La3Nb1-xTaxTi4O17 (0 <= x <= 1) Ceramics
DOI:10.1007/s11664-012-2272-6  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:2  AU: Manan, Abdul;Qazi, Ibrahim;Ullah, Atta;
7:6:32:5     Synthesis and Microwave Dielectric Properties of SrLa4-x Pr (x) Ti5O17 (0 a parts per thousand currency sign x a parts per thousand currency sign 4) Ceramics
DOI:10.1007/s11664-014-3069-6  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:3  AU: Manan, Abdul;Qazi, Ibrahim;Khan, Umer Saeed;
7:6:32:6     Phase, microstructural characterization and dielectric properties of Ca-substituted Sr5Nb4TiO17 ceramics
DOI:10.1007/s10853-010-5230-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:15  AU: Manan, A.;Iqbal, Y.;Qazi, I.;
7:6:32:7     Phase, Microstructure, and Microwave Dielectric Properties of NaCa4-x Sr (x) Nb5O17 (x=0 to 4) Ceramics
DOI:10.1007/s11664-012-2387-9  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:7  AU: Iqbal, Y.;Muhammad, R.;
7:6:32:8     Structure and microwave dielectric properties of Ca(5)A(4)TiO(17) (A = Nb, Ta) ceramics
DOI:10.1016/j.matchemphys.2009.12.046  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:10  AU: Joseph, Tony;Anjana, P. S.;Letourneau, S.;Ubic, R.;van Smaalen, Sander;Sebastian, M. T.;
7:6:33:1     Microwave properties of Ba(Zn1/3Ta2/3)O-3 dielectric resonators
DOI:10.1016/j.jallcom.2010.09.069  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:20  AU: Nedelcu, L.;Toacsan, M. I.;Banciu, M. G.;Ioachim, A.;
7:6:33:2     Dielectric properties of Ba(Zn1/3Ta2/3)O-3 thin films on Pt-coated Si substrates
DOI:10.1016/j.tsf.2012.09.002  JN:THIN SOLID FILMS  PY:2012
  TC:5  AU: Nedelcu, L.;Mandache, N. B.;Toacsan, M. I.;Vlaicu, A. M.;Banciu, M. G.;Ioachim, A.;Gherendi, F.;Luculescu, C. R.;Nistor, M.;
7:6:33:3     Structural and dielectric properties of Ba(X1/3Ta2/3)O-3 thin films grown by RF-PLD
DOI:10.1016/j.apsusc.2012.10.124  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: Nedelcu, L.;Scarisoreanu, N. D.;Chirila, C.;Busuioc, C.;Banciu, M. G.;Jinga, S. I.;Dinescu, M.;
7:6:33:4     Influence of liquid phase lead borate glass on dielectric response of lead iron niobate
DOI:10.1016/j.jallcom.2013.10.114  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Quazi, Tanveer;Singh, Kamal;Sayyed, Shahin;Acharya, S.;
7:6:33:5     Microwave dielectric dispersion in a multiferroic Pb(Fe1/2Nb1/2)O-3 thin film
DOI:10.1063/1.3696043  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Sobiestianskas, R.;Peng, W.;Lemee, N.;Karkut, M.;Banys, J.;Holc, J.;Kosec, M.;
7:6:33:6     Characterization of BaMg1/3(Ta1-xNbx)(2/3)O-3 ceramics obtained by a modified Pechini method
DOI:10.1016/j.jallcom.2010.03.019  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Jinga, Cristina;Berger, Daniela;Matei, Cristian;Jinga, Sorin;Andronescu, Ecaterina;
7:6:33:7     Short- and medium-range structure of multiferroic Pb(Fe1/2Nb1/2)O-3 studied using neutron total scattering analysis
DOI:10.1103/PhysRevB.83.064108  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Jeong, I. -K.;Ahn, J. S.;Kim, B. G.;Yoon, S.;Singh, Satendra Pal;Pandey, Dhananjai;
7:6:33:8     Optical and structural studies on Ba(Mg1/3Ta2/3)O-3 thin films obtained by radiofrequency assisted pulsed plasma deposition
DOI:10.1016/j.apsusc.2010.04.041  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:6  AU: Scarisoreanu, N. D.;Galca, A. C.;Nedelcu, L.;Ioachim, A.;Toacsan, M. I.;Morintale, E.;Stoica, S. D.;Dinescu, M.;
7:6:33:9     Microwave dielectric properties of Ba(Zn1/3Ta2/3)O-3 ceramics doped with Nb2O5, MnO2 or V2O3
DOI:10.1016/j.materresbull.2012.06.035  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Jinga, S. I.;Stoleriu, S.;Busuioc, C.;
7:6:33:10     Microwave dielectric properties of lanthanum based complex perovskites
DOI:10.1016/j.jallcom.2014.06.122  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Nath, Masood A.;Samal, Saroj L.;Obulesu, K. Rama;Raju, K. C. James;Ganguli, Ashok K.;
7:6:34:1     Structural properties and phase transformation of sol-gel prepared lanthanum tantalates
DOI:10.1007/s10853-014-8552-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:1  AU: Brunckova, H.;Medvecky, L.;Durisin, J.;Hvizdos, P.;Girman, V.;
7:6:34:2     Synthesis of nanosized beta-BiTaO4 by the polymeric precursor method
DOI:10.1016/j.matlet.2010.02.020  JN:MATERIALS LETTERS  PY:2010
  TC:20  AU: Almeida, Cristiane Gomes;Carvalho Andrade, Heloysa Martins;Santos Mascarenhas, Artur Jose;Silva, Luciana Almeida;
7:6:34:3     Modeling and simulation of AlxGayIn1-x-yAs/InP quaternary structure for photovoltaic
DOI:10.1016/j.ijhydene.2014.04.162  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2014
  TC:1  AU: Aissat, A.;El Bey, M.;Bestam, R.;Vilcot, J. P.;
7:6:34:4     Phase transformation and particle morphology of perovskite La1/3TaO3 precursors prepared by polymeric tartrate complex sol-gel method
DOI:10.1016/j.matlet.2013.10.067  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Brunckova, Helena;Medvecky, L'ubomir;Durisin, Juraj;Girman, Vladimir;
7:6:34:5     Displacive Ordering Transitions in Perovskite-Like AgNb1/2Ta1/2O3
DOI:10.1021/cm101263p  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:9  AU: Levin, I.;Woicik, J. C.;Llobet, A.;Tucker, M. G.;Krayzman, V.;Pokorny, J.;Reaney, I. M.;
7:6:34:6     Synthesis and characterization of a new ferroelectric oxide Li2Pb2Pr2W2Ti4Ta4O30
DOI:10.1016/j.jallcom.2013.09.170  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Parida, B. N.;Das, Piyush R.;
7:6:34:7     Suppressed temperature dependence of the resonant frequency of a AgNb0.5Ta0.5O3 composite vs. single-phase ceramics
DOI:10.1016/j.jeurceramsoc.2013.12.031  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Klement, Dejan;Spreitzer, Matjaz;Suvorov, Danilo;
7:6:34:8     Photocatalytic hydrogen production with visible light over Mo and Cr-doped BiNb(Ta)O-4
DOI:10.1016/j.ijhydene.2013.11.019  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2014
  TC:4  AU: Almeida, Cristiane G.;Araujo, Rafael B.;Yoshimura, Rafael G.;Mascarenhas, Artur J. S.;da Silva, Antonio Ferreira;Araujo, Carlos Moyses;Silva, Luciana A.;
7:6:34:9     Effect of heat treatment on the generation of structural defects in LaTaO4 ceramics and their correlation with photoluminescent properties
DOI:10.1016/j.jallcom.2011.06.032  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Gasparotto, G.;Nascimento, N. M.;Cebim, M. A.;Varela, J. A.;Zaghete, M. A.;
7:6:34:10     Synthesis of CdS nano-spheres by a simple and fast sonochemical method at room temperature
DOI:10.1016/j.matlet.2014.07.173  JN:MATERIALS LETTERS  PY:2014
  TC:5  AU: Lopes, Paula A. L.;Santos, Mauricio Brandao;Santos Mascarenhas, Artur Jose;Silva, Luciana Almeida;
7:6:35:1     Effects of BaCu(B2O5) on sintering characteristics and microwave dielectric properties of CaWO4 ceramics
DOI:10.1016/j.ceramint.2014.03.028  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Zhang, Zhu;Su, Hua;Tang, Xiaoli;Zhang, Huaiwu;Zhou, Tingchuan;Jing, Yulan;
7:6:35:2     Microwave dielectric properties of scheelite structured low temperature fired Bi(In1/3Mo2/3)O-4 ceramic
DOI:10.1016/j.ceramint.2012.11.021  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Pang, Li-Xia;Zhou, Di;Guo, Jing;Qi, Ze-Ming;Shao, Tao;
7:6:35:3     Dielectric and Microstructural Study of the SrWO4, BaWO4, and CaWO4 Scheelite Ceramics
DOI:10.1111/j.1551-2916.2010.04378.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:12  AU: Krzmanc, Marjeta Macek;Logar, Manca;Budic, Bojan;Suvorov, Danilo;
7:6:35:4     Low-temperature sintered MgWO4-CaTiO3 ceramics with near-zero temperature coefficient of resonant frequency
DOI:10.1016/j.jeurceramsoc.2011.10.042  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:14  AU: Guo, Mei;Dou, Gang;Gong, Shuping;Zhou, Dongxiang;
7:6:35:5     Glass-free low-temperature sintering and microwave dielectric properties of CaWO4-Li2WO4 ceramics
DOI:10.1016/j.ceramint.2013.07.050  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Zhang, Zhu;Su, Hua;Tang, Xiaoli;Zhang, Huaiwu;Zhou, Tingchuan;Jing, Yulan;
7:6:35:6     Effects of microwave sintering on the properties of 0.87(Mg0.7Zn0.3)TiO3-0.13(Ca0.61La0.26)TiO3 ceramics
DOI:10.1016/j.ceramint.2012.03.062  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Huang, Chun-e;Zhao, Li;Qiu, Tai;Yang, Jian;Shen, Chunying;
7:6:35:7     Effect of ZnO-WO3 additives on sintering behavior and microwave dielectric properties of 0.95MgTiO(3)-0.05CaTiO(3) ceramics
DOI:10.1016/j.ceramint.2013.12.010  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Xie, Wentao;Thou, Hongqing;Zhu, Haikui;Zhao, Jianxin;Tang, Guowei;Yu, Xuan;
7:6:36:1     Influence of manganese on the structure and magnetic properties of YFeO3 nanocrystal
DOI:10.1016/j.ceramint.2011.09.030  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Shen, Hui;Xu, Jiayue;Jin, Min;Jiang, Guojian;
7:6:36:2     Low-Temperature Sintering and Electromagnetic Properties of NiCuZn/CaTiO3 Composites
DOI:10.1007/s11664-012-1933-9  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2012
  TC:1  AU: Yang, Haibo;Yang, Yanyan;Lin, Ying;Zhu, Jianfeng;Wang, Fen;
7:6:36:3     Structure and magnetic properties of the perovskite YCo0.5Fe0.5O3
DOI:10.1063/1.4904811  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Wei, Yingfen;Gui, Hong;Zhao, Zhenjie;Li, Junrui;Liu, Yong;Xin, Shengwei;Li, Xiaohong;Xie, Wenhui;
7:6:36:4     Preparation and electromagnetic properties of in-situ Ba0.8Sr0.2TiO3/YFeO3 composites
DOI:10.1016/j.ceramint.2013.01.055  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Yang, Haibo;Yang, Yanyan;Lin, Ying;Liu, Miao;
7:6:36:5     Hybrid processing and properties of Ni0.8Zn0.2Fe2O4/Ba0.6Sr0.4TiO3 magnetodielectric composites
DOI:10.1557/JMR.2010.0224  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:9  AU: Yang, Haibo;Wang, Hong;Shui, Li;He, Li;
7:6:36:6     Fabrication and Properties of Novel Polyetheretherketone/Barium Titanate Composites with Low Dielectric Loss
DOI:10.1007/s11664-011-1743-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2011
  TC:7  AU: Goyal, R. K.;Madav, V. V.;Pakankar, P. R.;Butee, S. P.;
7:6:36:7     Dielectric and piezoelectric properties of rare-earth gadolinium modified lead lanthanum zirconium niobium titanate ceramics
DOI:10.1016/j.ceramint.2010.11.016  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:3  AU: Ramam, Koduri;Chandramouli, K.;
7:6:36:8     Thermal and Dielectric Behavior of Flexible Polycarbonate/Lead Zirconate Titanate Composite System
DOI:10.1002/app.39913  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2014
  TC:1  AU: Sain, P. K.;Goyal, R. K.;Bhargava, A. K.;Prasad, Y. V. S. S.;
7:6:37:1     Structure Evolution and Enhanced Microwave Dielectric Characteristics of (Sr-1 (-) Ca-x(x))La2Al2O7 Ceramics
DOI:10.1111/jace.13145  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Yi, Lei;Li, Lei;Liu, Xiao Qiang;Chen, Xiang Ming;
7:6:37:2     Structure and Microwave Dielectric Properties of Solid Solution in SrLaAlO4-Sr2TiO4 System
DOI:10.1111/j.1551-2916.2011.04627.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Mao, Min Min;Chen, Xiang Ming;Liu, Xiao Qiang;
7:6:37:3     Structure and microwave dielectric characteristics of (Sr1-xCax) Nd2Al2O7 ceramics
DOI:10.1016/j.matchemphys.2014.04.023  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Yi, Lei;Liu, Xiao Qiang;Li, Lei;Chen, Xiang Ming;
7:6:37:4     Improvement of Microwave Dielectric Characteristics in SrLaAlO4 Ceramics by Ca Substitution
DOI:10.1111/j.1551-2916.2010.03990.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Peng, Li Qin;Mao, Min Min;Chen, Xi'ang Ming;
7:6:37:5     Dielectric relaxation in LiNbO3-MgAl2O4 nanocomposite
DOI:10.1016/j.matlet.2012.05.056  JN:MATERIALS LETTERS  PY:2012
  TC:0  AU: Han, Yemei;Li, Lingxia;Xia, Wangsuo;Liu, Yueying;Ren, Xiang;
7:6:37:6     High epsilon(r) and low loss microwave dielectric ceramics Ba3LiNb3-xTaxTi5O21
DOI:10.1016/j.matchemphys.2012.07.032  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:1  AU: Fang, Liang;Wu, Meixia;Liu, Qinwen;Tang, Ying;Zhou, Huanfu;Zhang, Hui;
7:6:37:7     Improvement of microwave dielectric characteristics in SrNdAlO4 ceramics by Ca-substitution
DOI:10.1016/j.ceramint.2013.11.058  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Zhang, Chao;Yi, Lei;Chen, Xiang Ming;
7:6:37:8     Sintering behavior and microwave dielectric properties of Ba6-3xNd8+2xTi18O54 (x=2/3) ceramics coated by H3BO3-TEOS sol-gel
DOI:10.1016/j.matchemphys.2010.05.046  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:11  AU: Pang, Li-Xia;Wang, Hong;Zhou, Di;Liu, Wei-Hong;
7:6:37:9     Structural Evolution and Its Effects on Dielectric Loss in Sr1+xSm1-xAl1-xTixO4 Microwave Dielectric Ceramics
DOI:10.1111/j.1551-2916.2011.04408.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Mao, Min Min;Liu, Xiao Qiang;Chen, Xiang Ming;
7:6:38:1     Influence of B2O3 additions and sintering temperature on microwave dielectric properties of La2.98/3Ba0.01(Mg0.5Sn0.5)O-3 ceramics
DOI:10.1016/j.jallcom.2009.11.085  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:21  AU: Chen, Yih-Chien;Hsu, Wei-Yu;Wang, Yen-Nien;Chen, Jia-Woei;
7:6:38:2     Copper concentration effect in the dielectric properties of BiNbO4 for RF applications
DOI:10.1016/j.jallcom.2012.07.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:0  AU: Sales, A. J. M.;Oliveira, P. W. S.;Almeida, J. S.;Costa, M. M.;Rodrigues, H. O.;Sombra, A. S. B.;
7:6:38:3     Microstructures and microwave dielectric properties of (1-y)La1-xSmx(Mg0.5Sn0.5)O-3-yCa(0.8)Sm(0.4/3)TiO(3) ceramics
DOI:10.1016/j.ceramint.2011.12.009  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Wang, Yen-Nien;Chen, Yih-Chien;Pan, Ya-Dung;Lee, Wei-Cheng;
7:6:38:4     Microwave dielectric properties of BiNbO4 ceramics with CuO-V2O5 addition
DOI:10.1016/j.ceramint.2011.04.078  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Lee, Hong Ryul;Yoon, Ki Hyun;Kim, Eung Soo;Choi, Ji Won;Boucher, Richard;
7:6:38:5     Influence of B2O3 on Microstructure and Microwave Dielectric Properties of 0.45La(0.97)Sm(0.03)(Mg0.5Sn0.5) O-3-0.55Ca(0.8)Sm(0.4/3)TiO(3) Ceramic System
DOI:10.1080/00150193.2012.732478  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Chen, Kuei-Chien;Chen, Yih-Chien;Lee, Wei-Cheng;
7:6:38:6     Investigation of solution-processed bismuth-niobium-oxide films
DOI:10.1063/1.4898323  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Inoue, Satoshi;Ariga, Tomoki;Matsumoto, Shin;Onoue, Masatoshi;Miyasako, Takaaki;Tokumitsu, Eisuke;Chinone, Norimichi;Cho, Yasuo;Shimoda, Tatsuya;
7:6:38:7     Effect of lanthanide ion substitution on RF and microwave dielectric properties of BiNbO4 ceramics
DOI:10.1016/j.jallcom.2009.11.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Butee, Sandeep;Kulkarni, Ajit R.;Prakash, Om;Aiyar, R. P. R. C.;Sudheendran, K.;Raju, K. C. James;
7:6:38:8     Enthalpy of formation of selected mixed oxides in a CaO-SrO-Bi2O3-Nb2O5 system
DOI:10.1016/j.jallcom.2011.02.007  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Leitner, J.;Nevriva, M.;Sedmidubsky, D.;Vonka, P.;
7:6:38:9     Influence of B2O3 Additions and Sintering Temperature on the Dielectric Properties of La2.98/3Sr0.01(Mg0.5Sn0.5)O-3 Ceramics at Microwave Frequency
DOI:10.1080/00150193.2011.531203  JN:FERROELECTRICS  PY:2011
  TC:0  AU: Chen, Yih-Chien;Wang, Yen-Nien;Hsu, Wei-Yu;
7:6:39:1     Effects of Mg Substitution on Microstructures and Microwave Dielectric Properties of Ba(Zn1/3Nb2/3)O-3 Perovskite Ceramics
DOI:10.1111/j.1551-2916.2009.03459.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:15  AU: Fu, Mao Sen;Liu, Xiao Qiang;Chen, Xiang Ming;Zeng, Yao Wu;
7:6:39:2     A Monolithic Perovskite Structure for Use as a Magnetic Regenerator
DOI:10.1111/j.1551-2916.2011.04398.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Pryds, Nini;Clemens, Frank;Menon, Mohan;Nielsen, Pernille H.;Brodersen, Karen;Bjork, Rasmus;Bahl, Christian R. H.;Engelbrecht, Kurt;Nielsen, Kaspar K.;Smith, Anders;
7:6:39:3     Phase Transition Domains in Ca-based Complex Perovskite Dielectric Ceramics
DOI:10.1111/j.1551-2916.2012.05302.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:0  AU: Fu, Mao Sen;Ni, Lei;Liu, Xiao Qiang;Chen, Xiang Ming;Zeng, Yue Wu;
7:6:39:4     Phase coexistence in NaNb(1-x)TaxO3 materials with enhanced dielectric properties
DOI:10.1039/c2jm32078a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:2  AU: Torres-Pardo, Almudena;Jimenez, Ricardo;Garcia-Gonzalez, Ester;Gonzalez-Calbet, Jose M.;
7:6:39:5     Transmission Electron Microscopy Evidence of Spontaneous B-Cation Layered Distribution in NaNb1-xTaxO3
DOI:10.1021/ja1031858  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:6  AU: Torres-Pardo, Almudena;Krumeich, Frank;Gonzalez-Calbet, Jose M.;Garcia-Gonzalez, Ester;
7:6:39:6     The effect of cation ordering and domain boundaries on low loss Ba((B1/3B2/3II)-B-I)O-3 perovskite dielectrics revealed by high-angle annular dark-field scanning transmission electron microscopy (HAADF STEM)
DOI:10.1016/j.jeurceramsoc.2014.03.007  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Azough, Feridoon;Freer, Robert;Iddles, David;Shimada, Takeshi;Schaffer, Bernhard;
7:6:39:7     Tetragonal Tungsten Bronzes in Ba(M1/32+Nb2/3)O-3 Microwave Ceramics
DOI:10.1080/00150193.2012.740348  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Ovchar, O.;Durilin, D.;Belous, A.;Porokhonskyy, V.;Jancar, B.;Kolodiazhnyi, T.;
7:6:40:1     Structural, microwave dielectric properties and dielectric resonator antenna studies of Sr(ZrxTi1-x)O-3 ceramics
DOI:10.1016/j.jallcom.2012.03.047  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:14  AU: Parida, S.;Rout, S. K.;Subramanian, V.;Barhai, P. K.;Gupta, N.;Gupta, V. R.;
7:6:40:2     Effect of TiO2 and CaTiO3 additives on the sintering behavior and microwave dielectric properties of Ca(Mg0.92Al0.08) (Si0.96Al0.04)(2)O-6 ceramics
DOI:10.1016/j.ceramint.2014.06.006  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Li, Denghao;Wang, Humping;Yang, Qinghua;Lei, Ruoshan;Ma, Hongping;Xu, Shiqing;
7:6:40:3     Solubility limits and microwave dielectric properties of Ca(ZrxTi1-x)O-3 solid solution
DOI:10.1016/j.jallcom.2012.08.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Parida, S.;Rout, S. K.;Gupta, N.;Gupta, V. R.;
7:6:40:4     Microwave dielectric properties of (1-x)ZnAl2O4-xCaTiO(3) compound ceramic with controlled temperature coefficient
DOI:10.1016/j.ceramint.2012.05.096  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Tseng, Ching-Fang;Tsai, Ping-Sung;
7:6:40:5     Influence of mechanical activation on sphene based ceramic material synthesis
DOI:10.1016/j.ceramint.2012.06.052  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Pantic, Jelena;Kremenovic, Aleksandar;Dosen, Anja;Prekajski, Marija;Stankovic, Nadezda;Bascarevic, Zvezdana;Matovic, Branko;
7:6:40:6     Microwave dielectric properties of (Zn1-xMgx)TiO3 (ZMT) ceramics for dielectric resonator antenna application
DOI:10.1016/j.jallcom.2011.08.028  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Gangwar, Ravi Kumar;Singh, S. P.;Choudhary, Meenakshi;Singh, Nitish Kumar;Kumar, Devendra;Rao, G. Lakshmi Narayana;Raju, K. C. James;
7:6:40:7     Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation
DOI:10.1016/j.jallcom.2013.06.046  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Pantic, Jelena;Prekajski, Marija;Dramicanin, Miroslav;Abazovic, Nadica;Vukovic, Nikola;Kremenovic, Aleksandar;Matovic, Branko;
7:6:41:1     Microwave dielectric properties of (1-x)SiO2-xTiO(2) composite ceramics derived from core-shell structured microspheres
DOI:10.1016/j.materresbull.2014.01.016  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Hu, Chengxi;Liu, Yuan;Liu, Peng;Zhang, Weiwei;Zhu, Jianrui;
7:6:41:2     Preparation and microwave dielectric properties of SiO2 ceramics by aqueous Sol-Gel technique
DOI:10.1016/j.jallcom.2012.11.168  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:11  AU: Hu, Chengxi;Liu, Peng;
7:6:41:3     Preparation and microwave dielectric properties of cristobalite ceramics
DOI:10.1016/j.ceramint.2012.02.027  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:14  AU: Fang, Yong;Li, Lei;Xiao, Qing;Chen, Xiang Ming;
7:6:41:4     Control of the coating layer thickness of TiO2-SiO2 core-shell hybrid particles by liquid phase deposition
DOI:10.1016/j.apt.2010.06.003  JN:ADVANCED POWDER TECHNOLOGY  PY:2011
  TC:8  AU: Ohno, Tomoya;Numakura, Kazunori;Itoh, Hidenobu;Suzuki, Hisao;Matsuda, Takeshi;
7:6:41:5     Ba(Mg1/3Ta2/3)O-3 filled PTFE composites for microwave substrate applications
DOI:10.1016/j.matchemphys.2010.03.035  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:5  AU: James, Nijesh K.;Jacob, K. Stanly;Murali, K. P.;Ratheesh, R.;
7:6:41:6     Preparation of the BaTiO3-SiO2 hybrid particles for the catalyst of methane steam reforming process
DOI:10.1016/j.matchemphys.2012.03.025  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:1  AU: Ohno, Tomoya;Numakura, Kazunori;Suzuki, Hisao;Matsuda, Takeshi;
7:6:42:1     Effect of glass fluxing on densification and microwave dielectric properties of LiInSiO4 ceramic
DOI:10.1016/j.jallcom.2012.10.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Sunny, Annrose;Lazer, Kokken Anlin;Manu, Kurusaroor Mana;Surendran, Kuzhichalil Peethambharan;Sebastian, Mailadil Thomas;
7:6:42:2     BaMg1/3Nb2/3O3-Mg4Nb2O9 composite microwave ceramics with high Q-factor and low sintering temperature
DOI:10.1016/j.jeurceramsoc.2012.06.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Kolodiazhnyi, Taras;
7:6:42:3     Low temperature cofiring and compatibility with silver electrode of ZnO-SnO2-TiO2-Nb2O5 ceramics with BaCu(B2O5) addition
DOI:10.1016/j.ceramint.2011.07.015  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Zhou, Huanfu;Liu, Xiaobin;Wang, Hong;Chen, Xiuli;
7:6:42:4     Densification and characterization of SiO2-B2O3-CaO-MgO glass/Al2O3 composites for LTCC application
DOI:10.1016/j.ceramint.2013.01.061  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Chen, Xingyu;Zhang, Weijun;Bai, Shuxin;Du, Yongguo;
7:6:42:5     A study on the interfacial reaction and dielectric properties of Ba-0.88(Nd1.40Bi0.42La0.30)Ti4O12/alkali-borosilicate glass composites
DOI:10.1016/j.ceramint.2010.07.021  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:2  AU: Lin, Kuan-Hong;Liao, Chang-Lun;Lin, Shun-Tian;
7:6:42:6     Low temperature cofirable Ca[(Li1/3Nb2/3)(0.95)Zr-0.15]O3+delta microwave dielectric ceramic with ZnO-B2O3-SiO2 frit
DOI:10.1016/j.ceramint.2011.12.021  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Hu, Mingzhe;Xiong, Juan;Gu, Haoshuang;Chen, Yihang;Wang, Yu;
7:6:43:1     Microwave Dielectric Properties of LiBiW2O8 Ceramics with Low Sintering Temperature (Retracted article. See vol. 94, pg. 291, 2011)
DOI:10.1111/j.1551-2916.2010.04162.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Zhou, Huanfu;Chen, Xiuli;Fang, Liang;Liu, Xiaobin;Wang, Yiliang;
7:6:43:2     Microwave Dielectric Properties of Ba2Ca1-xSrxWO6 Double Perovskites
DOI:10.1111/j.1551-2916.2011.04450.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:7  AU: Zhou, Yuanyuan;Meng, Siqin;Wu, Hongchao;Yue, Zhenxing;
7:6:43:3     Structure and microwave dielectric properties of Ba-3(VO4)(2)-Zn2-xSiO4-x ceramic composites
DOI:10.1016/j.materresbull.2013.02.014  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:7  AU: Lv, Yang;Zuo, Ruzhong;Yue, Zhenxing;
7:6:43:4     Structural Transitions and Microwave Dielectric Properties of (Ba, Sr)(2)LnSbO(6) (Ln = La, Pr, Nd, Sm, Gd, Dy) Double Perovskites
DOI:10.1080/00150193.2012.740262  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Zhou, Yuanyuan;Yue, Zhenxing;Meng, Siqin;
7:6:43:5     Preparation and microwave dielectric properties of 3ZnO center dot B2O3 ceramics with low sintering temperature
DOI:10.1016/j.jeurceramsoc.2011.10.013  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Hu, Yunxiang;Wei, Dongmei;Fu, Qiuyun;Zhao, Jun;Zhou, Dongxiang;
7:6:43:6     Microwave Dielectric Properties of LiBiW2O8 Ceramics with Low Sintering Temperature (Retraction of vol 93, pg 3976, 2010)
DOI:10.1111/j.1551-2916.2010.04344.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:0  AU: Zhou, H.;Chen, X.;Fang, L.;Liu, X.;Wang, Y.;
7:6:44:1     Preparation and Characterization of a New Microwave Dielectric Ceramic Ba4ZnTi11O27
DOI:10.1111/j.1551-2916.2009.03561.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Zhou, Huanfu;Chen, Xiuli;Fang, Liang;Hu, Changzheng;Wang, Hong;
7:6:44:2     Microwave dielectric properties of BaO-2(1-x)ZnO-xNd(2)O(3)-4TiO(2) (x=0-1.0) ceramics
DOI:10.1016/j.ceramint.2011.07.050  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Yu, Shengquan;Zhang, Shuren;Tang, Bin;Zhou, Xiaohua;Fang, Youwei;
7:6:44:3     Microstructure and microwave dielectric properties of Li2Ti1-x(Zn1/3Nb2/3)(x)O-3 ceramics
DOI:10.1016/j.ceramint.2012.11.081  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:3  AU: Chen, Guo-hua;Xu, Hua-rui;Yuan, Chang-lai;
7:6:44:4     Phase analysis and improvement of quality factor of Li2ZnTi3O8 ceramics by annealing treatment
DOI:10.1016/j.jallcom.2013.07.154  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Armaki, Hamid Taghipour;Taheri-Nassaj, Ehsan;Bari, Maryam;
7:6:44:5     Microwave Dielectric Properties of Ca4La2Ti5-x(Mg1/3Nb2/3)(x)O-17 Ceramics
DOI:10.1111/j.1551-2916.2011.05004.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Chen, Guo-hua;Di, Jie-chang;Xu, Hua-rui;Jiang, Min-hong;Yuan, Chang-lai;
7:6:44:6     Structure and dielectric characteristics of Ca(Fe1/2Ta1/2)O-3 complex perovskite ceramics
DOI:10.1016/j.ceramint.2010.11.036  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:1  AU: Lv, Xin;Wang, Zhuo;Chen, Xiang Ming;
7:6:44:7     A link between p-type electrical conduction and microwave dielectric loss in highly ordered Ba(Co1/3Nb2/3)O-3 ceramics
DOI:10.1557/JMR.2010.0132  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:1  AU: Li, Ming;Feteira, Antonio;Mirsaneh, Mehdi;Lanagan, Michael T.;Sinclair, Derek C.;
7:6:45:1     Phase evolution and microwave dielectric properties of MgO-B2O3-SiO2-based glass-ceramics
DOI:10.1016/j.ceramint.2011.08.025  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Dosler, Urban;Krzmanc, Marjeta Macek;Suvorov, Danilo;
7:6:45:2     Effects of Nb2O5 Doping on the Microwave Dielectric Properties and Microstructures of Bi2Mo2O9 Ceramics
DOI:10.1111/jace.12204  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Lee, Ying-Chieh;Chiu, Jam-Da;Chen, Yu Hong;
7:6:45:3     The synthesis and microwave dielectric properties of Mg3B2O6 and Mg2B2O5 ceramics
DOI:10.1016/j.jeurceramsoc.2009.05.049  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:22  AU: Dosler, Urban;Krzmanc, Marjeta Macek;Suvorov, Danilo;
7:6:45:4     A High-Q Microwave Dielectric Material Based on Mg3B2O6
DOI:10.1111/j.1551-2916.2010.03926.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:2  AU: Dosler, Urban;Krzmanc, Marjeta Macek;Jancar, Bostjan;Suvorov, Danilo;
7:6:45:5     The effect of Ga3+ addition on the sinterability and microwave dielectric properties of RE3Al5O12 (Tb3+, Y3+, Er3+ and Yb3+) garnet ceramics
DOI:10.1016/j.ceramint.2013.08.097  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Sunny, Annrose;Viswanath, Varsha;Surendran, Kuzhichatil Peethambharan;Sebastian, Mailadil Thomas;
7:6:45:6     Preparation and Microwave Dielectric Properties of TiO2-Doped YAG Ceramics
DOI:10.1080/00150193.2010.484726  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Zhou, Yuanyuan;Yue, Zhenxing;Li, Longtu;
7:6:45:7     Microstructure and tensile properties of ZnO-coated magnesium borate whisker reinforced AZ31B composite
DOI:10.1016/j.msea.2012.06.008  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2012
  TC:4  AU: Jin, Peipeng;Han, Li;Chen, Shanhua;Wang, Jinhui;Zhu, Yunpeng;
7:6:46:1     Effects of manganese oxide addition and reductive atmosphere annealing on the phase stability and microstructure of yttria stabilized zirconia
DOI:10.1016/j.jeurceramsoc.2013.04.004  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Huang, Yen-Lin;Lee, Ying-Chieh;Tsai, Du-Cheng;Chiu, Jam-Da;Shieu, Fuh-Sheng;
7:6:46:2     Ceramic Dusting Corrosion of Yttria-Stabilized Zirconia in Ultra High Temperature Reverse-Flow Pyrolysis Reactors
DOI:10.1111/jace.12035  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Chun, ChangMin;Desai, Sanket;Hershkowitz, Frank;Ramanarayanan, Trikur A.;
7:6:46:3     Effect of TiO2 doped Ni electrodes on the dielectric properties and microstructures of (Ba0.96Ca0.04)(Ti0.85Zr0.15)O-3 multilayer ceramic capacitors
DOI:10.1016/j.jeurceramsoc.2011.11.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:6  AU: Chiang, Chen-Su;Lee, Ying-Cliieh;Shiao, Fu-Thang;Lee, Wen-Hsi;Hennings, Detlev;
7:6:46:4     Preparation and quality evaluation of a simulating Sr-90 ceramic source
DOI:10.1016/j.ceramint.2014.05.125  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Hu, Rui;Kan, Wentao;Deng, Jian;Liu, Yebing;Yang, Yuqing;Jiang, Kuo;Luo, Shunzhong;
7:6:46:5     Melting index characterization and thermal conductivity model of plasma sprayed YSZ coatings
DOI:10.1016/j.jeurceramsoc.2012.05.030  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Wang, Yongzhe;Hua, Jiajie;Liu, Ziwei;Zeng, Yi;Zhou, Ying;Wang, Hu;
7:6:46:6     Pressureless sintering of ZrO2-ZrSiO4/NiCr functionally graded materials with a shrinkage matching process
DOI:10.1016/j.jeurceramsoc.2012.11.026  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Wu, Kangjian;Scheler, Sven;Park, Ho-Seon;Willert-Porada, Monika;
7:6:46:7     Degradation of zirconate materials in ultra-high temperature reverse-flow pyrolysis reactors
DOI:10.1007/s10853-013-7206-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:0  AU: Chun, Changmin;Desai, Sanket;Hershkowitz, Frank;Ramanarayanan, Trikur A.;
7:6:47:1     Functional advances of microwave dielectrics for next generation
DOI:10.1016/j.ceramint.2011.04.068  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:15  AU: Ohsato, Hitoshi;
7:6:47:2     Microwave dielectric properties of (1-x)ZnTa2O6-xMgNb(2)O(6) ceramics
DOI:10.1016/j.ceramint.2012.10.218  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Fu, Baojian;Zhang, Yingchun;Yue, Hui;
7:6:47:3     Effect of CuO Addition on Microwave Dielectric Properties of 0.80Sm(Mg0.5Ti0.5)O-3-0.20Ca(0.8)Sr(0.2)TiO(3) Ceramics
DOI:10.1007/s11664-014-3234-y  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Yao, Lichun;Yang, Jian;Qiu, Tai;
7:6:47:4     Phase analysis and microwave dielectric properties of BaO-Nd2O3-5TiO(2) composite ceramics using variable size TiO2 reagents
DOI:10.1016/j.ceramint.2011.04.070  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Snashall, Amanda L.;Noren, Lasse;Liu, Yun;Yamashita, Toru;Brink, Frank;Withers, Raymond L.;
7:6:47:5     Characteristics of BaNd2Ti5O14 powders directly prepared by high-temperature spray pyrolysis
DOI:10.1016/j.ceramint.2009.06.022  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:1  AU: Ko, You Na;Jung, Dae Soo;Han, Jin Man;Koo, Hye Young;Lee, Man-Jong;Kang, Yun Chan;
7:6:47:6     Effect of Bi2O3 and B2O3 additives on the sintering temperature, microstructure, and microwave dielectric properties for Sm(Mg0.5Ti0.5)O-3 ceramics
DOI:10.1016/j.ceramint.2010.11.017  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:4  AU: Tay, Kok-Wan;Fu, Yen-Pei;Huang, Jen-Fen;Huang, Hung-Chi;
7:6:47:7     Microwave dielectric properties and microstructure of Sm(Mg0.5Ti0.5-xSnx)O-3 ceramics
DOI:10.1016/j.ceramint.2014.02.093  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Yao, Lichun;Yang, Ran;Qiu, Tai;
7:6:48:1     Temperature and frequency dependence of dielectric loss of Ba(Mg1/3Ta2/3)O-3 microwave ceramics
DOI:10.1016/j.jeurceramsoc.2009.04.027  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Shimada, T.;Ichikawa, K.;Minemura, T.;Kolodiazhnyi, T.;Breeze, Jonathan;Alford, Neil McN.;Annino, Giuseppe;
7:6:48:2     Frequency-dependent Qf value of low-loss Ba2Ti9O20 ceramics at microwave frequencies
DOI:10.1016/j.ceramint.2012.05.082  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Li, Lei;Chen, Xiang Ming;
7:6:48:3     Frequency-Dependent Qf Value of Microwave Dielectric Ceramics
DOI:10.1111/jace.13199  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Li, Lei;Chen, Xiang Ming;
7:6:48:4     Raman scattering, electronic structure and microwave dielectric properties of Ba([Mg1-xZnx](1/3)Ta-2/3)O-3 ceramics
DOI:10.1016/j.ceramint.2011.09.018  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Ning, Ping-Fan;Li, Ling-Xia;Zhang, Ping;Xia, Wang-Suo;
7:6:48:5     Abnormal variation of microwave dielectric properties in A/B site co-substituted (Ca1-0.3xLa0.2x)[(Mg1/3Ta2/3)(1-x)Ti-x]O-3 complex perovskite ceramics
DOI:10.1016/j.jeurceramsoc.2012.10.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Fu, Mao Sen;Ni, Lei;Chen, Xiang Ming;
7:6:48:6     Effect of Sample Size on Measurement Reliability of Microwave Dielectric Properties of Low-Loss Materials by a Resonant Cavity Method
DOI:10.1080/00150193.2012.731991  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Li, Lei;Chen, Xiang Ming;
7:6:49:1     Dielectric Properties of an Ultra-Low-Temperature Cofiring Bi2Mo2O9 Multilayer
DOI:10.1111/j.1551-2916.2010.03602.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Zhou, Di;Randall, Clive A.;Baker, Amanda;Wang, Hong;Pang, Li-Xia;Yao, Xi;
7:6:49:2     Low Sintering Temperature Microwave Dielectric Ceramics and Composites Based on Bi2O3-B2O3
DOI:10.1111/j.1551-2916.2012.05295.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Chen, Xingyu;Zhang, Weijun;Zalinska, Beata;Sterianou, Iasmi;Bai, Shuxin;Reaney, Ian M.;
7:6:49:3     Microwave dielectric properties of Pb2MoO5 ceramic with ultra-low sintering temperature
DOI:10.1016/j.jeurceramsoc.2014.05.004  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Xie, Huidong;Xi, Haihong;Li, Fei;Chen, Chao;Wang, Xiaochang;Zhou, Di;
7:6:49:4     Microwave Dielectric Properties and Microstructures of Y2O3-Doped Bi2Mo2O9 Ceramics
DOI:10.1080/00150193.2012.732791  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Chen, Hui-Ru;Lee, Ying-Chieh;Chen, Guo Hao;Chen, Yu Hong;
7:6:49:5     Phase transitions and microwave dielectric properties of Bi3NbO7 ceramics with Bi4B2O9 addition
DOI:10.1016/j.ceramint.2012.10.243  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Zhang, Weijun;Chen, Xingyu;Bai, Shuxin;
7:6:49:6     Dielectric Properties of Low-Firing Bi2Mo2O9 Thick Films Screen Printed on Al Foils and Alumina Substrates
DOI:10.1111/j.1551-2916.2010.03719.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:2  AU: Liu, Weihong;Wang, Hong;Zhou, Di;Li, Kecheng;
7:6:50:1     Direct Control of Defects on Positron Lifetimes and Dielectric Constant of Microwave Ceramics
DOI:10.1111/jace.12354  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Tang, Yu;Zhang, Yi;Du, Piyi;Deng, Wen;
7:6:50:2     Effect of defect on the nonlinear and dielectric property of Ca(1-x)SrxCu3Ti4O12 ceramics synthesized by sol-gel process
DOI:10.1016/j.jallcom.2014.02.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Li, Tao;Liu, Dewei;Dai, Haiyang;Xiang, Huiwen;Chen, Zhenping;He, Huifang;Chen, Zhiquan;
7:6:50:3     Positron annihilation in Cr, Cu, and Au layers embedded in Al and quantum confinement of positrons in Au clusters
DOI:10.1103/PhysRevB.84.014106  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Pikart, Philip;Hugenschmidt, Christoph;Horisberger, Michael;Matsukawa, Yoshitaka;Hatakeyama, Masahiko;Toyama, Takeshi;Nagai, Yasuyoshi;
7:6:50:4     Thin film annealing and alloying of a Au/Cu two-layer system studied by positron annihilation spectroscopy
DOI:10.1016/j.jallcom.2013.10.094  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Reiner, M.;Pikart, P.;Hugenschmidt, C.;
7:6:51:1     Effects of Ta2O5/Y2O3 Codoping on the Microstructure and Microwave Dielectric Properties of Ba(Co0.56Zn0.40)(1/3)Nb2/3O3 Ceramics
DOI:10.1007/s11664-014-3347-3  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:3  AU: Tang Bin;Si Feng;Li Ying-xiang;Chen He-tuo;Zhang Xiao;Zhang Shu-Ren;
7:6:51:2     Effects of Postdensification Annealing upon Microstructures and Microwave Dielectric Characteristics in Ba((Co0.6-x/2Zn0.4-x/2Mgx)(1/3)Nb-2/3)O-3 Ceramics
DOI:10.1111/jace.12486  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Ma, Pian P.;Yi, Lei;Liu, Xiao Q.;Li, Lei;Chen, Xiang M.;
7:6:51:3     Effects of Mg Substitution on Order/disorder Transition, Microstructure, and Microwave Dielectric Characteristics of Ba((Co0.6Zn0.4)1/3Nb2/3)O3 Complex Perovskite Ceramics
DOI:10.1111/jace.12240  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:11  AU: Ma, Pian Pian;Yi, Lei;Liu, Xiao Qiang;Li, Lei;Chen, Xiang Ming;
7:6:51:4     Application of positron annihilation and Raman spectroscopies to the study of perovskite type materials
DOI:10.1063/1.3517098  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Grebennikov, D.;Ovchar, O.;Belous, A.;Mascher, P.;
7:6:51:5     Structural properties of near-stoichiometric composition of Ba(B ' B-1/3 ''(2/3)) O-3 (B ' = Mg, Co, or Zn and B '' = Nb or Ta) perovskites
DOI:10.1557/jmr.2011.58  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:5  AU: Grebennikov, Dmytro;Mascher, Peter;
7:6:51:6     Effect of Al2O3 Addition on Microwave Dielectric Properties of BaCo0.194Zn0.116Nb0.69O3 Ceramics
DOI:10.1007/s13391-013-3063-9  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:5  AU: Liao, Peijun;Qiu, Tai;Yang, Jian;Lu, Xinyi;
7:6:51:7     Correlation of phonon characteristics and crystal structures of Ba[Zn-1/3(Nb1-xTax)(2/3)]O-3 solid solutions
DOI:10.1063/1.3676216  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Shi, Feng;Dong, Helei;
7:6:52:1     A low-firing microwave dielectric material in Li2O-ZnO-Nb2O5 system
DOI:10.1016/j.matlet.2010.07.073  JN:MATERIALS LETTERS  PY:2010
  TC:13  AU: Pang, Li-Xia;Zhou, Di;
7:6:52:2     Effect of Na2W2O7 addition on low-temperature sintering and microwave dielectric properties of CaWO4
DOI:10.1016/j.matlet.2010.11.028  JN:MATERIALS LETTERS  PY:2011
  TC:9  AU: Wang, L.;Bian, J. J.;
7:6:52:3     Sintering Behavior and Dielectric Properties of Ultra-Low Temperature Fired Silver Molybdate Ceramics
DOI:10.1111/jace.13159  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Zhou, Di;Li, Wen-Bo;Pang, Li-Xia;Guo, Jing;Qi, Ze-Ming;Shao, Tao;Yue, Zhen-Xing;Yao, Xi;
7:6:52:4     Synthesis of Nanocrystalline CaWO4 as Low-Temperature Co-fired Ceramic Material: Processing, Structural and Physical Properties
DOI:10.1007/s11664-012-2303-3  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:6  AU: Vidya, S.;Solomon, Sam;Thomas, J. K.;
7:6:52:5     Synthesis and Characterization of Solvothermal Processed Calcium Tungstate Nanomaterials from Alkoxide Precursors
DOI:10.1021/cm402622b  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:7  AU: Boyle, Timothy J.;Yang, Pin;Hattar, Khalid;Hernandez-Sanchez, Bernadette A.;Neville, Michael L.;Hoppe, Sarah;
7:6:53:1     Microwave dielectric properties of La3Ti2TaO11 ceramics with perovskite-like layered structure
DOI:10.1016/j.jeurceramsoc.2012.06.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:7  AU: Li, Chunchun;Wei, Xiaoyong;Yan, Haixue;Reece, Michael J.;
7:6:53:2     Low-firing of BiSbO4 microwave dielectric ceramic with V2O5-CuO addition
DOI:10.1016/j.matchemphys.2009.08.046  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:4  AU: Zhou, Di;Wang, Hong;Pang, Li-Xia;Yao, Xi;
7:6:53:3     Crystal structure and microwave dielectric properties of CaTiO3-La [Ga(1-delta)Al delta]O-3 ceramics system
DOI:10.1016/j.materresbull.2014.05.042  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Liang, Fei;Ni, Meng;Lu, Wenzhong;Feng, Shaoshuai;
7:6:53:4     Microwave dielectric properties of PTFE/CaTiO3 polymer ceramic composites
DOI:10.1016/j.ceramint.2011.01.039  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:8  AU: Hu, Yunxiang;Zhang, Yumin;Liu, Huan;Zhou, Dongxiang;
7:6:53:5     Effects of CaTiO3 addition on the densification and microwave dielectric properties of BiSbO4 ceramics
DOI:10.1016/j.ceramint.2012.09.058  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Wang, Sea-Fue;Chen, Jyh-Herng;Hsu, Yung-Fu;Wang, Yu-Ting;
7:6:53:6     Effects of Bi2Mo2O9 addition on the sintering characteristics and microwave dielectric properties of BiSbO4 ceramics
DOI:10.1016/j.jeurceramsoc.2011.07.005  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Wang, Sea-Fue;Hsu, Yung-Fu;Wang, Yuh-Ruey;Huang, Yong-Han;
7:6:53:7     Low temperature sintering and microwave dielectric properties of (Zn(0.65)Mg(0.35))TiO(3) ceramics with BiVO(4)
DOI:10.1007/s10853-010-4732-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:5  AU: Li, Bo;Tang, Bin;Zhang, Shuren;Jiang, Hongmei;
7:6:54:1     Low temperature sintering and microwave dielectric properties of Li2ZnTi3O8 ceramics doped with ZnO-La2O3-B2O3 glass
DOI:10.1016/j.ceramint.2013.12.041  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Lu, Xuepeng;Zheng, Yong;Dong, Zuowei;Cheng, Peng;Lin, Rong;
7:6:54:2     Microwave dielectric properties of (1-x)Ca0.6La0.267TiO3 - xCa(Sm0.5Nb0.5)O-3 ceramics
DOI:10.1016/j.ceramint.2012.02.015  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Li, Jiamao;Qiu, Tai;
7:6:54:3     Structure and dielectric characterization of xNd(Mg1/2Ti1/2)O-3-(1-x) Ca0.6La0.8/3TiO3 in the microwave frequency range
DOI:10.1016/j.jallcom.2011.03.056  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Chen, Yuan-Bin;
7:6:54:4     Low-temperature sintering and microwave dielectric properties of Nd(Co1/2Ti1/2)O-3 ceramics using glass addition of oxides
DOI:10.1016/j.ceramint.2012.06.010  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Hsu, Cheng-Hsing;Chang, Yu-Hsuan;Yang, Hsi-Wen;Lin, Jenn-Sen;
7:6:55:1     Dielectric characteristics of polyvinylidene fluoride-polyaniline percolative composites up to microwave frequencies
DOI:10.1063/1.4828795  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Li, Lei;Zhang, Bing Qing;Chen, Xiang Ming;
7:6:55:2     Measurement of Dielectric Properties of Pb(Zr0.52Ti0.48)O3, Ba0.5Sr0.5Nb2O6, and BaTiO3 Ferroelectric Ceramics at Microwave Frequencies
DOI:10.1111/j.1551-2916.2011.04871.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Li, Lei;Fang, Yong;Chen, Xiang Ming;
7:6:55:3     Dielectric properties of CaCu3Ti4O12, Ba(Fe1/2Nb1/2)O-3, and Sr(Fe1/2Nb1/2)O-3 giant permittivity ceramics at microwave frequencies
DOI:10.1063/1.3698627  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Li, Lei;Zhang, Wei;Chen, Xiang Ming;Zhu, Hai Yan;
7:6:55:4     Polyvinylidene fluoride-modified BaTiO3 composites with high dielectric constant and temperature stability
DOI:10.1016/j.ceramint.2012.10.025  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Xiao, Qing;Li, Lei;Zhan, Bing Qing;Chen, Xiang Ming;
7:6:56:1     Structure and Dielectric Properties of A-Site-Deficient Perovskite La(1-x)/3AgxNbO3 (0 < x < 0.25) Ceramics
DOI:10.1111/j.1551-2916.2010.04028.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Guo, Q. H.;Bian, J. J.;Wang, L.;
7:6:56:2     Structural evolution and microwave dielectric properties of A-site deficient perovskite La(1-x)/3NaxNbO3 (0.0 < x <= 0.4)
DOI:10.1016/j.matchemphys.2010.03.056  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:7  AU: Bian, J. J.;Li, Y. Z.;
7:6:56:3     Direct Observation of A-Site Vacancies and a Twin Boundary Structure in La2/3TiO3-Based Ceramics Using HAADF/STEM
DOI:10.1111/j.1551-2916.2009.03540.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Azough, Feridoon;Freer, Robert;Schaffer, Bernhard;
7:6:56:4     Structure and dielectric properties of A-site-deficient perovskite Nd(1-x)/3M (x) NbO3 (M = Li, Ag; 0 a parts per thousand currency sign x a parts per thousand currency sign 0.20) ceramics
DOI:10.1007/s10853-012-6509-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:1  AU: Jin, Xia;Guo, Qing Hong;Bian, Jian Jiang;
7:6:57:1     Structure stability and microwave dielectric properties of double perovskite ceramics - Ba2Mg1-xCaxWO6 (0.0 <= x <= 0.15)
DOI:10.1016/j.ceramint.2011.12.027  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:11  AU: Wu, Jia Yin;Bian, Jian Jiang;
7:6:57:2     Effect of nonstoichiometry on the microstructure and microwave dielectric properties of Ba(Mg1/2W1/2)O-3 ceramics
DOI:10.1016/j.ceramint.2012.10.193  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Wu, Jia Yin;Bian, Jian Jiang;
7:6:57:3     High-Temperature Decomposition of B-Site-Ordered Perovskite Ba(Zn1/2W1/2)O-3
DOI:10.1111/j.1551-2916.2009.03454.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Jancar, Bostjan;Bezjak, Jana;Davies, Peter K.;
7:6:57:4     Structure Stability and Microwave Dielectric Properties of (1-x) Ba(Mg1/2W1/2) O-3+xBa(Y2/3W1/3) O-3 Ceramics
DOI:10.1111/jace.12726  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Wu, Jia Y.;Bian, Jian J.;
7:6:58:1     Sintering Mechanism and Microwave Dielectric Properties of Bi12TiO20 Ceramics
DOI:10.1111/jace.12549  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Jeong, Byoung-Jik;Joung, Mi-Ri;Kim, Jin-Seong;Nahm, Sahn;Choi, Ji-Won;Hwang, Seong-Ju;
7:6:58:2     Microstructure and microwave dielectric properties of Bi12SiO20 ceramics
DOI:10.1016/j.materresbull.2012.08.075  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:6  AU: Jeong, Byoung-Jik;Joung, Mi-Ri;Kweon, Sang-Hyo;Kim, Jin-Seong;Nahm, Sahn;Choi, Ji-Won;Hwang, Seong-Ju;
7:6:58:3     Microstructures and Microwave Dielectric Properties of Bi2O3-Deficient Bi12SiO20 Ceramics
DOI:10.1111/jace.12323  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Jeong, Byoung-Jik;Joung, Mi-Ri;Kweon, Sang-Hyo;Kim, Jin-Seong;Nahm, Sahn;Choi, Ji-Won;Hwang, Seong-Ju;
7:6:58:4     Sintering Process and Microwave Dielectric Properties of Bi8TiO14 Ceramics
DOI:10.1111/jace.12959  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Joung, Mi-Ri;Jeong, Byoung-Jik;Kim, Jin-Seong;Woo, Sung-Ran;Park, Hyun-Min;Nahm, Sahn;
7:6:59:1     Preparation and Microwave Dielectric Properties of Ultra-low Temperature Sintering Ceramics in K2O-MoO3 Binary System
DOI:10.1111/jace.12646  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Zhang, Gao-qun;Guo, Jing;He, Li;Zhou, Di;Wang, Hong;Koruza, Jurij;Kosec, Marija;
7:6:59:2     Microwave dielectric properties of BaO-TiO2-TeO2 ternary system
DOI:10.1007/s10853-010-4352-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:5  AU: Jiao, Xiangquan;Zhong, Chaowei;Zhang, Shuren;Liu, Xingshu;Li, Bo;
7:6:59:3     Phase formation and crystal structure determination in the Y2O3-TeO2 system prepared in an oxygen atmosphere
DOI:10.1016/j.jeurceramsoc.2012.07.015  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Noguera, Olivier;Jouin, Jenny;Masson, Olivier;Jancar, Bostjan;Thomas, Philippe;
7:6:60:1     Densification and crystallization in crystallizable low temperature co-fired ceramics
DOI:10.1007/s10853-012-6318-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:4  AU: Dai, Steve;
7:6:60:2     Localized Temperature Stability in Low-Temperature Cofired Ceramics
DOI:10.1111/jace.12347  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Dai, Steve X.;
7:7:1:1     Enhancement of Giant Dielectric Response in CaCu3Ti4O12 Ceramics by Zn Substitution
DOI:10.1111/j.1551-2916.2009.03384.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:47  AU: Ni, Lei;Chen, Xiang Ming;
7:7:1:2     Effects of Ta5+ doping on microstructure evolution, dielectric properties and electrical response in CaCu3Ti4O12 ceramics
DOI:10.1016/j.jeurceramsoc.2012.02.048  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:29  AU: Thongbai, Prasit;Jumpatam, Jutapol;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:3     Enhancement of giant dielectric response in Ga-doped CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2012.07.027  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:13  AU: Jumpatam, Jutapol;Putasaeng, Bundit;Yamwong, Teerapon;Thongbai', Prasit;Maensiri, Santi;
7:7:1:4     A novel strategy to enhance dielectric performance and non-Ohmic properties in Ca2Cu2-xMgxTi4O12
DOI:10.1016/j.jeurceramsoc.2014.04.037  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Jumpatam, Jutapol;Putasaeng, Bundit;Yamwong, Teerapon;Thongbai, Prasit;Maensiri, Santi;
7:7:1:5     Evolution of the intergranular phase during sintering of CaCu3Ti4O12 ceramics
DOI:10.1016/j.jeurceramsoc.2009.08.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:40  AU: Romero, J. J.;Leret, P.;Rubio-Marcos, F.;Quesada, A.;Fernandez, J. F.;
7:7:1:6     The Lowered Dielectric Loss and Grain-Boundary Effects in La-doped Y2/3Cu3Ti4O12 Ceramics
DOI:10.1111/jace.12644  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:7  AU: Liang, Pengfei;Chao, Xiaolian;Wang, Fang;Liu, Zhanqing;Yang, Zupei;
7:7:1:7     Modified giant dielectric properties of samarium doped CaCu3Ti4O12 ceramics
DOI:10.1016/j.materresbull.2012.05.058  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:19  AU: Thongbai, Prasit;Putasaeng, Bundit;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:8     Microstructural evolution and Maxwell-Wagner relaxation in Ca2Cu2Ti4-xZrxO12: The important clue to achieve the origin of the giant dielectric behavior
DOI:10.1016/j.materresbull.2014.09.045  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:0  AU: Thongbai, Prasit;Jumpatam, Jutapol;Putasaeng, Bundit;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:9     Giant Dielectric Constant and Good Temperature Stability in Y2/3Cu3Ti4O12 Ceramics
DOI:10.1111/j.1551-2916.2012.05152.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:25  AU: Liang, Pengfei;Yang, Zupei;Chao, Xiaolian;Liu, Zonghuai;
7:7:1:10     Effect of oxygen sintering atmosphere on the electrical behavior of CCTO ceramics
DOI:10.1016/j.jeurceramsoc.2011.11.039  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:25  AU: Yu, Rong;Xue, Hao;Cao, Zeliang;Chen, La;Xiong, Zhaoxian;
7:7:1:11     Selectivity of doping ions to effectively improve dielectric and non-ohmic properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2013.03.086  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Vangchangyia, Somsack;Yamwong, Teerapon;Swatsitang, Ekaphan;Thongbai, Prasit;Maensiri, Santi;
7:7:1:12     Effects of sintering temperature on the internal barrier layer capacitor (IBLC) structure in CaCu3Ti4O12 (CCTO) ceramics
DOI:10.1016/j.jeurceramsoc.2012.03.040  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:47  AU: Schmidt, Rainer;Stennett, Martin C.;Hyatt, Neil C.;Pokorny, Jan;Prado-Gonjal, Jesus;Li, Ming;Sinclair, Derek C.;
7:7:1:13     Liquid phase sintering behavior and improvement of giant dielectric properties by modifying microstructure and electrical response at grain boundaries of CaCu3Ti4-xMoxO12 ceramics
DOI:10.1016/j.jallcom.2013.08.119  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:6  AU: Thongbai, Prasit;Putasaeng, Bundit;Yamwong, Teerapon;Amornkitbamrung, Vittaya;Maensiri, Santi;
7:7:1:14     Processing, dielectric properties and impedance characteristics of Na0.5Bi0.5Cu3Ti4O12 ceramics
DOI:10.1016/j.materresbull.2010.07.018  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:25  AU: Ren, Hongmei;Liang, Pengfei;Yang, Zupei;
7:7:1:15     Improved Dielectric and Nonlinear Electrical Properties of Fine-Grained CaCu3Ti4O12 Ceramics Prepared by a Glycine-Nitrate Process
DOI:10.1111/jace.12812  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Thongbai, Prasit;Yamwong, Teerapon;Maensiri, Santi;Amornkitbamrung, Vittaya;Chindaprasirt, Prinya;
7:7:1:16     Very high-performance dielectric properties of Ca1-3x/2YbxCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2014.05.143  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Boonlakhorn, Jakkree;Thongbai, Prasit;Putasaeng, Bundit;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:17     Effects of Ga Substitution for Cu on Microstructure and Giant Dielectric Response of CaGaxCu3-xTi4O12 (x=0, 0.01, and 0.05) Ceramics
DOI:10.1080/00150193.2013.841521  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Thongbai, Prasit;Jumpatam, Jutapol;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:18     Influence of zinc on electrical and microstructural properties of CaCu3Ti4O12 ceramics prepared by sol-gel process
DOI:10.1016/j.jallcom.2012.01.128  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:22  AU: Xu, Dong;Zhang, Chen;Lin, Yuanhua;Jiao, Lei;Yuan, Hongming;Zhao, Guoping;Cheng, Xiaonong;
7:7:1:19     Dielectric and Varistor Behavior of CaCu3Ti4O12-MgTiO3 Composite Ceramics
DOI:10.1111/j.1551-2916.2011.04533.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:21  AU: Yuan, Jiancong;Lin, Yuan-Hua;Lu, Huafei;Cheng, Bo;Nan, Ce-Wen;
7:7:1:20     Preparation of CaCu3Ti4O12 ceramics with low dielectric loss and giant dielectric constant by the sol-gel technique
DOI:10.1016/j.ceramint.2013.03.049  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:11  AU: Li, Yanyan;Liang, Pengfei;Chao, Xiaolian;Yang, Zupei;
7:7:1:21     Influence of vanadium on electrical and microstructural properties of CaCu3Ti4O12/CaTiO3
DOI:10.1016/j.jallcom.2010.03.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:18  AU: Ramajo, L.;Parra, R.;Varela, J. A.;Reboredo, M. M.;Ramirez, M. A.;Castro, M. S.;
7:7:1:22     Improved dielectric and non-ohmic properties of Ca2Cu2Ti4O12 ceramics prepared by a polymer pyrolysis method
DOI:10.1016/j.jallcom.2011.04.052  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:16  AU: Thongbai, Prasit;Putasaeng, Bundit;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:23     Microstructures and electrical responses of pure and chromium-doped CaCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2011.09.002  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:19  AU: Zheng, Qian;Fan, Huiqing;Long, Changbai;
7:7:1:24     Extremely Enhanced Nonlinear CurrentVoltage Properties of Tb-Doped CaCu3Ti4O12 Ceramics
DOI:10.1111/jace.12157  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Thongbai, Prasit;Boonlakhorn, Jakkree;Putasaeng, Bundit;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:25     Dielectric properties and electrical response of grain boundary of Na1/2La1/2Cu3Ti4O12 ceramics
DOI:10.1016/j.materresbull.2011.10.027  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:11  AU: Thongbai, Prasit;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:26     High permittivity and low dielectric loss of the Ca1-xSrxCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2011.06.039  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:16  AU: Yang, Zupei;Zhang, Lijuan;Chao, Xiaolian;Xiong, Lirong;Liu, Jie;
7:7:1:27     Very Low Loss Tangent and High Dielectric Permittivity in Pure-CaCu3Ti4O12 Ceramics Prepared by a Modified Sol-Gel Process
DOI:10.1111/j.1551-2916.2012.05147.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:23  AU: Vangchangyia, Somsack;Swatsitang, Ekaphan;Thongbai, Prasit;Pinitsoontorn, Supree;Yamwong, Teerapon;Maensiri, Santi;Amornkitbamrung, Vittaya;Chindaprasirt, Prinya;
7:7:1:28     Low dielectric loss, dielectric response, and conduction behavior in Na-doped Y2/3Cu3Ti4O12 ceramics
DOI:10.1063/1.4891240  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Liang, Pengfei;Chao, Xiaolian;Yang, Zupei;
7:7:1:29     Effect of AETiO(3) ( AE = Mg, Ca, Sr) doping on dielectric and varistor characteristics of CaCu3Ti4O12 ceramic prepared by the sol-gel process
DOI:10.1016/j.jallcom.2013.12.264  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Xu, Dong;He, Kai;Yu, Renhong;Jiao, Lei;Yuan, Hongming;Sun, Xiujuan;Zhao, Guoping;Xu, Hongxing;Cheng, Xiaonong;
7:7:1:30     The origin of giant dielectric relaxation and electrical responses of grains and grain boundaries of W-doped CaCu3Ti4O12 ceramics
DOI:10.1063/1.4768468  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Thongbai, Prasit;Jumpatam, Jutapol;Putasaeng, Bundit;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:31     Differentiated Electric Behaviors of La2/3Cu3Ti4O12 Ceramics Prepared by Different Methods
DOI:10.1111/jace.12940  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Liu, Zhanqing;Chao, Xiaolian;Liang, Pengfei;Yang, Zupei;Zhi, Lei;
7:7:1:32     High Schottky barrier at grain boundaries observed in Na1/2Sm1/2Cu3Ti4O12 ceramics
DOI:10.1016/j.materresbull.2013.06.028  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:5  AU: Somphan, Weeraya;Thongbai, Prasit;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:33     High permittivity, low dielectric loss, and high electrostatic potential barrier in Ca2Cu2Ti4O12 ceramics
DOI:10.1016/j.matlet.2012.02.054  JN:MATERIALS LETTERS  PY:2012
  TC:13  AU: Jumpatam, Jutapol;Thongbai, Prasit;Kongsook, Boonsong;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:34     Structure and modified giant dielectric response in CaCu3(Ti1-xSnx)(4)O-12 ceramics
DOI:10.1016/j.matchemphys.2010.08.010  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:12  AU: Ni, Lei;Chen, Xiang Ming;Liu, Xiao Qiang;
7:7:1:35     Preparation, characterization and dielectric properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2011.08.052  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:23  AU: Zhao, Jingchang;Liu, Jia;Ma, Guang;
7:7:1:36     New negative temperature coefficient thermistor ceramics in Mn-doped CaCu3-xMnxTi4O12 (0 <= x <= 1) system
DOI:10.1016/j.ceramint.2014.03.165  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Zhang, Bo;Zhao, Qing;Chang, Aimin;Ye, Haitao;Chen, Shi;Wu, Yiquan;
7:7:1:37     Origin of giant permittivity and high-temperature dielectric anomaly behavior in Na0.5Y0.5Cu3Ti4O12 ceramics
DOI:10.1063/1.4809927  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Liang, Pengfei;Li, Yanyan;Zhao, Yuqing;Wei, Lingling;Yang, Zupei;
7:7:1:38     Effect of the synthesis route on the phase formation behavior and electric property of Na0.5Bi0.5Cu3Ti4O12 ceramics
DOI:10.1016/j.materresbull.2014.01.009  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:5  AU: Liang, Pengfei;Li, Yanyan;Li, Fuchao;Chao, Xiaolian;Yang, Zupei;
7:7:1:39     Microstructural and electrical properties of CaTiO3-CaCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2009.10.216  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:18  AU: Wang, Chih-Ming;Lin, Shih-Yuan;Kao, Kuo-Sheng;Chen, Ying-Chung;Weng, Shang-Chih;
7:7:1:40     The dielectric suppress and the control of semiconductor non-Ohmic feature of CaCu3Ti4O12 by means of tin doping
DOI:10.1063/1.3574016  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:11  AU: Ribeiro, Willian C.;Araujo, Rafael G. C.;Bueno, Paulo R.;
7:7:1:41     Extreme effects of Na doping on microstructure, giant dielectric response and dielectric relaxation behavior in CaCu3Ti4O12 ceramics
DOI:10.1016/j.matlet.2013.05.017  JN:MATERIALS LETTERS  PY:2013
  TC:6  AU: Thongbai, Prasit;Meeporn, Keerati;Yamwong, Teerapon;Maensiri, Santi;
7:7:1:42     The route to resource-efficient novel materials
DOI:10.1038/nmat3180  JN:NATURE MATERIALS  PY:2011
  TC:26  AU: Krohns, S.;Lunkenheimer, P.;Meissner, S.;Reller, A.;Gleich, B.;Rathgeber, A.;Gaugler, T.;Buhl, H. U.;Sinclair, D. C.;Loidl, A.;
7:7:1:43     Dielectric properties of Zr doped CaCu3Ti4O12 synthesized by sol-gel route
DOI:10.1016/j.jallcom.2012.11.043  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Jesurani, S.;Kanagesan, S.;Hashim, M.;Ismail, I.;
7:7:1:44     Effect of tantalum substitutions on microstructures and dielectric properties of calcium copper titanate (CaCu3Ti4O12) ceramic
DOI:10.1016/j.mseb.2012.06.002  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:11  AU: Rai, Alok Kumar;Singh, Nitish Kumar;Acharya, Susant Kumar;Singh, Laxman;Mandal, K. D.;
7:7:1:45     Synthesis, dielectric and nonlinear electrical properties of Na1/2Bi1/2Cu3Ti4O12 ceramics by a sol-gel technique
DOI:10.1016/j.matlet.2012.01.025  JN:MATERIALS LETTERS  PY:2012
  TC:12  AU: Xu, Bin;Zhang, Jing;Tian, Zhaoming;Yuan, S. L.;
7:7:1:46     Preparation, microstructure, and improved dielectric and nonlinear electrical properties of Na1/2La1/2Cu3Ti4O12 ceramics by sol-gel method
DOI:10.1016/j.materresbull.2013.06.056  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:6  AU: Liu, Zhanqing;Jiao, Gengsheng;Chao, Xiaolian;Yang, Zupei;
7:7:1:47     Effect of Mn doping on the temperature-dependent anomalous giant dielectric behavior of CaCu3Ti4O12
DOI:10.1103/PhysRevB.85.245210  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Kim, C. H.;Jang, Y. H.;Seo, S. J.;Song, C. H.;Son, J. Y.;Yang, Y. S.;Cho, J. H.;
7:7:1:48     Giant dielectric response and mixed-valent structure in the layered-ordered double-perovskite ceramics
DOI:10.1016/j.ceramint.2011.04.029  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:7  AU: Yang, W. Z.;Fu, M. S.;Liu, X. Q.;Zhu, H. Y.;Chen, X. M.;
7:7:1:49     Study of structural, dielectric and electrical conduction behaviour of Gd substituted CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2011.11.085  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:23  AU: Kashyap, Raman;Thakur, O. P.;Tandon, R. P.;
7:7:1:50     Grain size independence of giant dielectric permittivity of CaCu3Ti4-xScxO12 ceramics
DOI:10.1016/j.ceramint.2014.07.118  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Meeporn, Keerati;Yamwong, Teerapon;Pinitsoontorn, Supree;Amornkitbamrung, Vittaya;Thongbai, Prasit;
7:7:1:51     The effect of calcining temperatures on the phase purity and electric properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2010.09.163  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:12  AU: Li, Tao;Xue, Renzhong;Hao, Junhong;Xue, Yuncai;Chen, Zhenping;
7:7:1:52     Synthesis of calcium copper titanate ceramics via the molten salts method
DOI:10.1016/j.ceramint.2010.02.018  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:13  AU: Chen, Ke-pi;Zhang, Xiao-wen;
7:7:1:53     Nanoparticles of the giant dielectric material, calcium copper titanate from a sol-gel technique
DOI:10.1016/j.matlet.2011.06.107  JN:MATERIALS LETTERS  PY:2011
  TC:20  AU: Jesurani, S.;Kanagesan, S.;Velmurugan, R.;Thirupathi, C.;Sivakumar, M.;Kalaivani, T.;
7:7:1:54     Microstructures and dielectric properties of spark plasma sintered Ba0.4Sr0.6TiO3/CaCu3Ti4O12 composite ceramics
DOI:10.1016/j.ceramint.2011.02.006  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:6  AU: Wu, Y. J.;Su, S. H.;Wu, S. Y.;Chen, X. M.;
7:7:1:55     Giant dielectric permittivity and non-linear electrical behavior in CaCu3Ti4O12 varistors from the molten-salt synthesized powder
DOI:10.1016/j.ceramint.2013.01.023  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Huang, Yanmin;Liu, Laijun;Shi, Danping;Wu, Shuangshuang;Zheng, Shaoying;Fang, Liang;Hu, Changzheng;Elouadi, Brahim;
7:7:1:56     Voltage-Current Nonlinearity of CaCu3Ti4O12 Ceramics
DOI:10.1111/j.1551-2916.2011.05025.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: Lu, Zhen-Ya;Li, Xiao-Ming;Wu, Jian-Qing;
7:7:1:57     Dielectric and non-Ohmic properties of CaCu3Ti4O12 ceramics modified with NiO, SnO2, SiO2, and Al2O3 additives
DOI:10.1007/s10853-011-6043-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:12  AU: Liu, Laijun;Huang, Yanmin;Li, Yunhua;Shi, Danping;Zheng, Shaoying;Wu, Shuangshuang;Fang, Liang;Hu, Changzheng;
7:7:1:58     Dielectric and nonlinear current-voltage characteristics of rare-earth doped CaCu3Ti4O12 ceramics
DOI:10.1063/1.3658258  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:13  AU: Liu, Laijun;Fang, Liang;Huang, Yanmin;Li, Yunhua;Shi, Danping;Zheng, Shaoying;Wu, Shuangshuang;Hu, Changzheng;
7:7:1:59     Electrical responses and dielectric relaxations in giant permittivity NaCu3Ti3TaO12 ceramics
DOI:10.1007/s00339-012-6897-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:5  AU: Sangwong, Nuchjarin;Somphan, Weeraya;Thongbai, Prasit;Yamwong, Teerapon;Meansiri, Santi;
7:7:1:60     Giant Dielectric Permittivity Properties and Relevant Mechanism of NaCu3Ti3SbO12 Ceramics
DOI:10.1111/j.1551-2916.2010.04197.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Hao, Wentao;Zhang, Jialiang;Tan, Yongqiang;Zhao, Minglei;Wang, Chunglei;
7:7:1:61     Effect of the Synthesis Route on the Microstructure and the Dielectric Behavior of CaCu3Ti4O12 Ceramics
DOI:10.1111/j.1551-2916.2012.05144.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:9  AU: de la Rubia, Miguel A.;Leret, Pilar;de Frutos, Jose;Fernandez, Jose F.;
7:7:1:62     Giant dielectric-permittivity property and relevant mechanism of Bi2/3Cu3Ti4O12 ceramics
DOI:10.1016/j.matchemphys.2010.08.041  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:13  AU: Tan, Y. Q.;Zhang, J. L.;Hao, W. T.;Chen, G.;Su, W. B.;Wang, C. L.;
7:7:1:63     High permittivity and low dielectric loss of Na0.5Bi0.5-xLaxCu3Ti4O12 ceramics
DOI:10.1016/j.materresbull.2011.08.009  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:11  AU: Yang, Zupei;Ren, Hongmei;Chao, Xiaolian;Liang, Pengfei;
7:7:1:64     Electric and Dielectric Behaviors of Y-Doped Calcium Copper Titanate
DOI:10.1111/j.1551-2916.2010.04022.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Luo, Fengchao;He, Jinliang;Hu, Jun;Lin, Yuan-Hua;
7:7:1:65     Electrical Conduction and Dielectric Properties of the Rb-doped CaCu3Ti4O12
DOI:10.1111/jace.12087  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Yang, Zhi;Zhang, Yue;Lu, Zhihong;Zhang, Kun;Xiong, Rui;Shi, Jing;
7:7:1:66     The non-ohmic and dielectric behavior evolution of CaCu3Ti4O12 after heat treatments in oxygen-rich atmosphere
DOI:10.1016/j.mseb.2011.10.007  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:11  AU: Zhang, Qiaoli;Li, Tao;Chen, Zhenping;Xue, Renzhong;Wang, Yongqiang;
7:7:1:67     Effect of vanadium doping on the dielectric and nonlinear current-voltage characteristics of CaCu3Ti4O12 ceramic
DOI:10.1016/j.jallcom.2010.07.094  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Sen, A.;Maiti, U. N.;Thapa, R.;Chattopadhyay, K. K.;
7:7:1:68     Giant permittivity and low dielectric loss of SrTiO3 ceramics sintered in nitrogen atmosphere
DOI:10.1016/j.jeurceramsoc.2014.01.015  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:5  AU: Wang, Zhijian;Cao, Minghe;Yao, Zhonghua;Zhang, Qi;Song, Zhe;Hu, Wei;Xu, Qi;Hao, Hua;Liu, Hanxing;Yu, Zhiyong;
7:7:1:69     Elastic modulus and hardness of CaTiO3, CaCu3Ti4O12 and CaTiO3/CaCu3Ti4O12 mixture
DOI:10.1016/j.matlet.2010.02.058  JN:MATERIALS LETTERS  PY:2010
  TC:9  AU: Ramirez, M. A.;Parra, R.;Reboredo, M. M.;Varela, J. A.;Castro, M. S.;Ramajo, L.;
7:7:1:70     Dielectric properties of giant permittivity NaCu3Ti3N13O12 ceramics
DOI:10.1016/j.ceramint.2013.05.023  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Liu, Yang;Wang, Wenchao;Huang, Jiquan;Tang, Fei;Zhu, Chen;Cao, Yongge;
7:7:1:71     Phase Evolution, Microstructure and Dielectric Properties of CaCu3Ti4O12 Ceramics Fabricated by Combustion Technique
DOI:10.1080/00150193.2013.846757  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Thongtha, Atthakorn;Laowanidwatana, Artid;Bongkarn, Theerachai;
7:7:1:72     Dielectric properties of iron doped calcium copper titanate, CaCu2.9Fe0.1Ti4O12
DOI:10.1016/j.jallcom.2011.06.008  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Rai, Alok Kumar;Singh, Nitish Kumar;Lee, Sang-Kwon;Mandal, K. D.;Kumar, D.;Parkash, Om;
7:7:1:73     Low-Temperature Dielectric Relaxations Associated with Mixed-Valent Structure in Na0.5Bi0.5Cu3Ti4O12
DOI:10.1111/jace.12208  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:5  AU: Sun, Xiaohong;Wang, Chunchang;Wang, Guojing;Lei, Changmei;Li, Teng;Liu, Lina;
7:7:1:74     Polaron relaxation and non-ohmic behavior in CaCu3Ti4O12 ceramics with different cooling methods
DOI:10.1016/j.matchemphys.2013.02.042  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:5  AU: Liu, Laijun;Shi, Danping;Zheng, Shaoying;Huang, Yanmin;Wu, ShuangShuang;Li, Yunhua;Fang, Liang;Hu, Changzheng;
7:7:1:75     A Novel Route to Greatly Enhanced Dielectric Permittivity with Reduce Loss Tangent in CaCu3-xZnxTi4O12/CaTiO3 Composites
DOI:10.1111/jace.13048  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Jumpatam, Jutapol;Putasaeng, Bundit;Yamwong, Teerapon;Thongbai, Prasit;Maensiri, Santi;
7:7:1:76     Preparation of TiO2-enriched CaCu3Mn0.1Ti3.9O12 ceramics and their dielectric properties
DOI:10.1016/j.jeurceramsoc.2009.07.033  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Sakamaki, Ryo;Cheng, Bo;Cai, Jingnan;Lin, Yuan-Hua;Nan, Ce-Wen;He, Jinliang;
7:7:1:77     Effect of sintering in oxygen on electrical conduction and dielectric properties in CaCu3Ti4O12
DOI:10.1016/j.materresbull.2012.10.029  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Yang, Zhi;Zhang, Yue;Xiong, Rui;Shi, Jing;
7:7:1:78     Fabrication of CaCu3Ti4O12 Multilayer Capacitors, Their Microstructure and Dielectric Properties
DOI:10.1080/00150193.2013.821385  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Kulawik, J.;Szwagierczak, D.;Synkiewicz, B.;
7:7:1:79     Phenomenological model of grain boundary behaviour under a bias field in Nb-doped CaCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2011.07.099  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Leret, P.;de la Rubia, M. A.;Romero, J. J.;De Frutos, J.;Fernandez, J. F.;
7:7:1:80     Relevance of the Percentage of Active Barriers in the Dielectric Response of CaCu3Ti4O12 Ceramics
DOI:10.1111/j.1551-2916.2010.03641.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:5  AU: Leret, Pilar;Angel de la Rubia, Miguel;Jose Romero, Juan;Francisco Fernandez, Jose;
7:7:1:81     Dielectric behaviour of Hf-doped CaCu3Ti4O12 ceramics obtained by conventional synthesis and reactive sintering
DOI:10.1016/j.jeurceramsoc.2012.01.024  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:15  AU: de la Rubia, M. A.;Leret, P.;del Campo, A.;Alonso, R. E.;Lopez-Garcia, A. R.;Fernandez, J. F.;de Frutos, J.;
7:7:1:82     Charge compensation, electrical and dielectric behavior of lanthanum doped CaCu3Ti4O12
DOI:10.1016/j.jallcom.2010.12.156  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:12  AU: Dubey, Ashutosh Kumar;Singh, Prakash;Singh, Sindhu;Kumar, Devendra;Parkash, Om;
7:7:1:83     Structure and electric properties of sol-gel derived CaCu3Ti4O12 ceramics as a pyroelectric sensor
DOI:10.1016/j.ssi.2010.05.036  JN:SOLID STATE IONICS  PY:2011
  TC:8  AU: Li, Zhuo;Fan, Huiqing;
7:7:1:84     Decrease in dielectric loss of CaCu3Ti4O12 by the addition of TeO2
DOI:10.1016/j.jnoncrysol.2010.07.049  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2011
  TC:16  AU: Amaral, F.;Costa, L. C.;Valente, M. A.;
7:7:1:85     Dielectric properties of soft chemical method derived CaCu3Ti4O12 thin films onto Pt/TiO2/Si(100) substrates
DOI:10.1016/j.jallcom.2010.12.184  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Moura, F.;Aguiar, E. C.;Longo, E.;Varela, J. A.;Simoes, A. Z.;
7:7:1:86     CaCu3Ti4O12 thin films with non-linear resistivity deposited by RF-sputtering
DOI:10.1016/j.jallcom.2013.05.216  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Foschini, C. R.;Tararam, R.;Simoes, A. Z.;Cilense, M.;Longo, E.;Varela, J. A.;
7:7:1:87     Effects of Zr doping on the microstructures and dielectric properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2013.01.090  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:8  AU: Chi, Q. G.;Gao, L.;Wang, X.;Lin, J. Q.;Sun, J.;Lei, Q. Q.;
7:7:1:88     Effect of calcium stoichiometry on the dielectric response of CaCu3Ti4O12 ceramics
DOI:10.1016/j.jeurceramsoc.2011.12.019  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:11  AU: Thomas, P.;Dwarakanath, K.;Varma, K. B. R.;
7:7:1:89     Investigation on the origin of the giant dielectric constant in CaCu3Ti4O12 ceramics through analyzing CaCu3Ti4O12-HfO2 composites
DOI:10.1016/j.jeurceramsoc.2011.09.021  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:12  AU: Yuan, Wen-Xiang;Hark, S. K.;
7:7:1:90     Effects of Carbon Coating on Microstructure and Dielectric Properties of CaCu3Ti4O12
DOI:10.1007/s11664-014-3337-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Wang, Mao-Hua;Ma, Xiao-Yu;Zhang, Bo;Zhou, Fu;
7:7:1:91     The effect of Ca-rich on the electric properties of Ca1+xCu3-xTi4O12 polycrystalline system
DOI:10.1016/j.mseb.2010.10.010  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:6  AU: Li, Tao;Fang, Kun;Hao, Junhong;Xue, Yuncai;Chen, Zhenping;
7:7:1:92     Dielectric properties of high permittivity ceramics based on Dy2/3CuTa4O12
DOI:10.1016/j.jallcom.2009.10.229  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Szwagierczak, D.;Kulawik, J.;
7:7:1:93     Leading role of grain boundaries in colossal permittivity of doped and undoped CCTO
DOI:10.1016/j.jeurceramsoc.2014.06.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:6  AU: De Almeida-Didry, Sonia;Autret, Cecile;Lucas, Anthony;Honstettre, Christophe;Pacreau, Francois;Gervais, Francois;
7:7:1:94     Synthesis and characterization of calcium copper titanate obtained by ethylenediaminetetraacetic acid gel combustion
DOI:10.1016/j.matchemphys.2010.07.016  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:7  AU: Amaral, F.;Valente, M.;Costa, L. C.;
7:7:1:95     Dielectric properties of Sm-doped CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2012.10.052  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:5  AU: Li, J.;Fu, B.;Lu, H.;Huang, C.;Sheng, J. W.;
7:7:1:96     Effect of processing routes on microstructure, electrical and dielectric behavior of Mg-doped CaCu3Ti4O12 electro-ceramic
DOI:10.1007/s00339-012-7443-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:7  AU: Singh, Laxman;Rai, U. S.;Mandal, K. D.;Rai, Alok Kumar;
7:7:1:97     Synthesis of the giant dielectric constant oxide CaCu3Ti4O12 via ethylenediaminetetraacetic acid precursor
DOI:10.1016/j.materresbull.2012.02.006  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:5  AU: He, Yanyan;Liu, Ting;Xu, Yebin;Zhao, Jingyuan;Du, Zeming;
7:7:1:98     Nanostripe domains in CaCu3Ti4O12: Its origin and influences on high permittivity response
DOI:10.1063/1.3457231  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Sarkar, Sudipta;Chaudhuri, B. K.;Yang, H. D.;
7:7:1:99     Microstructure and Dielectric Properties of Bismuth Copper Tantalate as Internal Barrier Layer Capacitor Ceramic
DOI:10.1080/00150193.2013.821384  JN:FERROELECTRICS  PY:2013
  TC:2  AU: Szwagierczak, D.;Kulawik, J.;
7:7:1:100     Preparation of CCTO Powders and Ceramics by a Simple Solid State Mixed Oxide Method
DOI:10.1080/00150193.2011.577380  JN:FERROELECTRICS  PY:2011
  TC:5  AU: Puchmark, Chompoonuch;Rujijanagul, Gobwute;
7:7:1:101     Effects of Rare-Earth Doping on Dielectric Properties of CaCu3Ti4O12 Ceramics
DOI:10.1080/00150193.2013.841470  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Li, J.;Lu, H.;Lu, C.;Huang, C.;Fu, B.;Cai, J.;Sheng, J. W.;
7:7:1:102     Extraction and dielectric properties of curcuminoid films grown on Si substrate for high-k dielectric applications
DOI:10.1016/j.mseb.2013.06.003  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Dakhel, A. A.;Jasim, Khalil E.;Cassidy, S.;Henari, F. Z.;
7:7:1:103     Comparative study of potassium hexatitanate (K2Ti6O13) whiskers prepared by sol-gel and solid state reaction routes
DOI:10.1016/j.apsusc.2012.04.018  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:6  AU: Siddiqui, Mohd Asim;Chandel, Vishal Singh;Azam, Ameer;
7:7:1:104     Synthesis and sintering behavior of La0.8Sr0.2CrO3 by a glycine nitrate process
DOI:10.1016/j.ceramint.2011.03.025  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:4  AU: Thomas, Elizabeth;Lee, Da Hae;Yoon, Mi Young;Ehrman, Sheryl. H.;Hwang, Hae Jin;
7:7:1:105     CaCu3Ti4O12 Ceramic Synthesized by Sonochemical-Assisted Process
DOI:10.1080/10584587.2013.852936  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:1  AU: Wongpisutpaisan, Narongdet;Vittayakorn, Naratip;Ruangphanit, Anucha;Pecharapa, Wisanu;
7:7:1:106     Photo-assisted metal-organic chemical vapor deposition of CaCu3Ti4O12 (CCTO) thin films
DOI:10.1016/j.mssp.2013.03.013  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2013
  TC:3  AU: Gupta, N.;McMillen, C.;
7:7:2:1:1     Studies of temperature dependent ac impedance of a negative temperature coefficient Mn-Co-Ni-O thin film thermistor
DOI:10.1063/1.3596454  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:15  AU: He, Lin;Ling, Zhiyuan;
7:7:2:1:2     Electrical conduction of intrinsic grain and grain boundary in Mn-Co-Ni-O thin film thermistors: Grain size influence
DOI:10.1063/1.3657772  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: He, L.;Ling, Z. Y.;
7:7:2:1:3     Fabrication and properties of Mn1.56Co0.96Ni0.48O4 free-standing ultrathin chips
DOI:10.1016/j.ceramint.2014.01.049  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Kong, Wenwen;Chen, Long;Gao, Bo;Zhang, Bo;Zhao, Pengjun;Ji, Guang;Chang, Aimin;Jiang, Chunping;
7:7:2:1:4     Spin Spray-Deposited Nickel Manganite Thermistor Films For Microbolometer Applications
DOI:10.1111/j.1551-2916.2010.04097.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:13  AU: Ko, Song Won;Li, Jing;Podraza, Nikolas J.;Dickey, Elizabeth C.;Trolier-McKinstry, Susan;
7:7:2:1:5     In-plane impedance spectroscopy in aerosol deposited NiMn2O4 negative temperature coefficient thermistor films
DOI:10.1063/1.3592300  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Ryu, Jungho;Park, Dong-Soo;Schmidt, Rainer;
7:7:2:1:6     Effects of annealing temperature on microstructure and electrical properties of Mn-Co-Ni-O thin films
DOI:10.1016/j.matlet.2011.03.029  JN:MATERIALS LETTERS  PY:2011
  TC:21  AU: He, L.;Ling, Z. Y.;Huang, Y. T.;Liu, Y. S.;
7:7:2:1:7     Low-temperature (< 300 degrees C) growth and characterization of single-[100]-oriented Mn-Co-Ni-O thin films
DOI:10.1016/j.matlet.2013.05.079  JN:MATERIALS LETTERS  PY:2013
  TC:10  AU: Ji, Guang;Chang, Aimin;Xu, Jinbao;Zhang, Huimin;Hou, Juan;Zhang, Bo;Zhao, Pengjun;
7:7:2:1:8     Variation in hopping conduction across the magnetic transition in spinel Mn1.56Co0.96Ni0.48O4 films
DOI:10.1063/1.3318459  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Wu, Jing;Huang, Zhiming;Hou, Yun;Gao, Yanqing;Chu, Junhao;
7:7:2:1:9     Optical properties of Mn-Co-Ni-O thin films prepared by radio frequency sputtering deposition
DOI:10.1063/1.4867439  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Zhou, Wei;Wu, Jing;Ouyang, Cheng;Gao, Yanqing;Xu, Xiaofeng;Huang, Zhiming;
7:7:2:1:10     Micro structural, electrical and optical properties of highly (220) oriented spinel Mn-Co-Ni-O film grown by radio frequency magnetron sputtering
DOI:10.1016/j.apsusc.2014.05.088  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:2  AU: Zhou, Wei;Zhang, Leibo;Ouyang, Cheng;Wu, Jing;Huang, Zhiming;Xu, Xiao-feng;
7:7:2:1:11     Low Temperature Crystallization of Metastable Nickel Manganite Spinel Thin Films
DOI:10.1111/j.1551-2916.2012.05201.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Ko, Song Won;Schulze, Heidi M.;Saint John, David B.;Podraza, Nikolas J.;Dickey, Elizabeth C.;Trolier-McKinstry, Susan S.;
7:7:2:1:12     Investigation of cation distribution, electrical, magnetic properties and their correlation in Mn2-xCo2xNi1-xO4 films
DOI:10.1063/1.4868683  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Wu, Jing;Huang, Zhiming;Zhou, Wei;Ouyang, Cheng;Hou, Yun;Gao, Yanqing;Chen, Ren;Chu, Junhao;
7:7:2:1:13     Far infrared and micro structural studies of mechanically activated nickel manganite
DOI:10.1016/j.ceramint.2012.07.054  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Savic, S. M.;Nikolic, M. V.;Paraskevopoulos, K. M.;Zorba, T. T.;Nikolic, N.;Blagojevic, V.;Aleksic, O. S.;Brankovic, G.;
7:7:2:1:14     Epitaxial growth of Mn-Co-Ni-O thin films and thickness effects on the electrical properties
DOI:10.1016/j.matlet.2014.05.091  JN:MATERIALS LETTERS  PY:2014
  TC:5  AU: Ji, Guang;Chang, Aimin;Li, Hongyi;Xie, Yahong;Zhang, Huimin;Kong, Wenwen;
7:7:2:1:15     Structural and electrical properties of Mn1.56Co0.96Ni0.48O4 NTC thermistor films
DOI:10.1016/j.mseb.2014.02.011  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:7  AU: Gao, Y. Q.;Huang, Z. M.;Hou, Y.;Wu, J.;Zhou, W.;OuYang, C.;Huang, J. G.;Tong, J. C.;Chu, J. H.;
7:7:2:1:16     Effect of oxygen partial pressure and temperature on NTC characteristics of Mn1.56Co0.96Ni0.48O4 thin films grown on SrTiO3 (100) by laser MBE
DOI:10.1016/j.jallcom.2014.05.089  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Xie, Yahong;Ji, Guang;Bu, Haijun;Kong, Wenwen;Gao, Bo;Yao, Jincheng;Chang, Aimin;Jiang, Chunping;
7:7:2:1:17     Structural, electrical, and magnetic properties of Mn2.52-xCoxNi0.48O4 films
DOI:10.1063/1.3309780  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Wu, Jing;Huang, Zhiming;Hou, Yun;Gao, Yanqing;Chu, Junhao;
7:7:2:1:18     Infrared optical properties of Mn1.56Co0.96Ni0.48O4 thin films prepared by chemical solution deposition
DOI:10.1007/s00339-013-7685-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:5  AU: Gao, Y. Q.;Huang, Z. M.;Hou, Y.;Wu, J.;Zhou, W.;Zhang, L. B.;Chu, J. H.;
7:7:2:1:19     Effects of preferred orientation on electrical properties of Mn1.56Co0.96Ni0.48O4 (+/- delta) spinel films
DOI:10.1016/j.matlet.2014.08.124  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Kong, Wenwen;Bu, Haijun;Gao, Bo;Chen, Long;Cheng, Fei;Zhao, Pengjun;Ji, Guang;Chang, Aimin;Jiang, Chunping;
7:7:2:1:20     Effect of Ca substitution on crystal structure and superconducting properties of ferromagnetic superconductor RuSr2-xCaxGd1.4Ce0.6Cu2O10-delta
DOI:10.1016/j.jmmm.2011.09.022  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:0  AU: Fallahi, S.;Mazaheri, M.;Nikseresht, N.;Ronnow, H. M.;Akhavan, M.;
7:7:2:1:21     Temperature dependence of Mn1.56Co0.96Ni0.48O4 thin films optical properties by spectroscopic ellipsometry
DOI:10.1016/j.matlet.2014.08.025  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Ma, Chao;Wang, Hong Guang;Zhao, Peng Jun;Xu, Jin Bao;Chang, Ai Min;Wang, Lei;Bian, Liang;
7:7:2:2:1     Influence of copper substitution on structural, electrical and dielectric properties of Ni(1-x)CuxMn2O4 (0 <= x <= 1) ceramics
DOI:10.1016/j.jallcom.2010.07.143  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:21  AU: Jadhav, R. N.;Puri, Vijaya;
7:7:2:2:2     Improvement of structural and electrical properties of Mn-based thin film thermistors by a bilayer structure
DOI:10.1016/j.matlet.2014.04.136  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: He, L.;Zhang, G.;Ling, Z. Y.;
7:7:2:2:3     Preparation and characterization of Cu and Zn modified nickel manganite NTC powders and thick film thermistors
DOI:10.1016/j.mseb.2012.11.003  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:7  AU: Aleksic, O. S.;Nikolic, M. V.;Lukovic, M. D.;Nikolic, N.;Radojcic, B. M.;Radovanovic, M.;Djuric, Z.;Mitric, M.;Nikolic, P. M.;
7:7:2:2:4     Studies on the properties of Ni0.6Cu0.4Mn2O4 NTC ceramic due to Fe doping
DOI:10.1016/j.ceramint.2012.03.024  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:14  AU: Jadhav, R. N.;Mathad, S. N.;Puri, Vijaya;
7:7:2:2:5     Structural and electrical properties of NiMgxMn2-xO4 NTC thermistors prepared by using sol-gel derived powders
DOI:10.1016/j.mseb.2011.01.020  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:11  AU: Wang, Jiangying;Zhang, Jingji;
7:7:2:2:6     Sintering temperature and impedance analysis of Mn0.9Co1.2Ni0.27Mg0.15Al0.03Fe0.45O4 NTC ceramic prepared by W/O microemulsion method
DOI:10.1016/j.jallcom.2014.07.149  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Xia, Junbo;Zhao, Qing;Gao, Bo;Chang, Aimin;Zhang, Bo;Zhao, Pengjun;Ma, Renjun;
7:7:2:2:7     Preparation and electrical properties of Mn1.05-yCo1.95-x-z-wNixMgyAlz FewO4 NTC ceramic derived from microemulsion method
DOI:10.1016/j.jallcom.2013.12.021  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Xia, Junbo;Zhao, Qing;Gao, Bo;Chang, Aimin;Zhang, Bo;Ma, Renjun;
7:7:2:2:8     Aging improvement in Cu-containing NTC ceramics prepared by co-precipitation method
DOI:10.1016/j.jallcom.2013.08.014  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Li, Deng-Feng;Zhao, Shi-Xi;Xiong, Kai;Bao, Han-Qing;Nan, Ce-Wen;
7:7:2:2:9     Effect of Cu and Fe addition on electrical properties of Ni-Mn-Co-O NTC thermistor compositions
DOI:10.1016/j.ceramint.2012.05.025  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Muralidharan, M. N.;Rohini, P. R.;Sunny, E. K.;Dayas, K. R.;Seema, A.;
7:7:2:2:10     Optimization of process parameters for the production of Ni-Mn-Co-Fe based NTC chip thermistors through tape casting route
DOI:10.1016/j.jallcom.2011.07.037  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:11  AU: Muralidharan, M. N.;Sunny, E. K.;Dayas, K. R.;Seema, A.;Resmi, K. R.;
7:7:2:2:11     Preparation of Ni0.9Mn2.1-xMgxO4 (0 <= x <= 0.3) negative temperature coefficient ceramic materials by a rheological phase reaction method
DOI:10.1016/j.matlet.2013.09.003  JN:MATERIALS LETTERS  PY:2013
  TC:4  AU: Yao, Jincheng;Zhang, Bingyin;Wang, Junhua;Chang, Aimin;Ji, Guang;Zhao, Pengjun;Zhao, Lijun;
7:7:2:2:12     Microstructural and electrical changes in nickel manganite powder induced by mechanical activation
DOI:10.1016/j.materresbull.2011.03.008  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:6  AU: Savic, S. M.;Mancic, L.;Vojisavljevic, K.;Stojanovic, G.;Brankovic, Z.;Aleksic, O. S.;Brankovic, G.;
7:7:2:2:13     Effect of Zn substitution on the phase, microstructure and electrical properties of Ni0.6Cu0.5ZnxMn1.9-xO4 (0 <= x <= 1) NTC ceramics
DOI:10.1016/j.mseb.2014.06.011  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:1  AU: Ma, Chengjian;Liu, Yunfei;Lu, Yinong;Gao, Hong;Qian, Hao;Ding, Jianxiang;
7:7:2:2:14     An efficient way to improve the electrical stability of Ni0.6Si0.2Al0.6Mn1.6O4 NTC thermistor
DOI:10.1016/j.ceramint.2011.03.061  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:5  AU: Liang, Sen;Yang, Jianfeng;Yi, Xiaohong;Zhang, Xiao;Bai, Yu;
7:7:2:2:15     Preparation and electrical properties of Ni0.6Mn2.4-xSnxO4 NTC ceramics
DOI:10.1016/j.ceramint.2013.09.037  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Wang, Zhongbing;Li, Zhenbo;Zhang, Yi;Zhang, Ruyian;Qin, Pan;Chen, Chunnian;Winnubst, Louis;
7:7:2:2:16     Dielectric Spectroscopy and Microwave Conductivity of Bismuth Strontium Manganites at High Frequencies
DOI:10.1007/s13391-012-2109-8  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:2  AU: Mathad, S. N.;Jadhav, R. N.;Pawar, R. P.;Puri, Vijaya;
7:7:2:2:17     Proton conducting CaZr0.9In0.1O3-delta ceramic membrane prepared by tape casting
DOI:10.1016/j.ssi.2012.03.040  JN:SOLID STATE IONICS  PY:2012
  TC:0  AU: Zhang, Jingchao;Wen, Zhaoyin;Chi, Xiaowei;Han, Jinduo;Wu, Xiangwei;Wen, Ting-lian;
7:7:2:3:1     Structural and electrical properties of thick film thermistors based on perovskite La-Mn-Al-O
DOI:10.1016/j.ceramint.2014.03.022  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Xiong, Xinqian;Xu, Jinbao;Zhao, Pengjun;Wang, Lei;Bian, Liang;Xu, Fanglong;Zhang, Jiaqi;Chang, Aiming;
7:7:2:3:2     Electrical characterization of nickel manganite powders in high-frequency range
DOI:10.1016/j.jallcom.2012.11.184  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Stojanovic, Goran M.;Kitic, Goran;Savic, Slavica M.;Crnojevic-Bengin, Vesna;
7:7:2:3:3     Complex impedance analysis of (Y2O3 + CeO2)-YCr0.5Mn0.5O3 composite NTC ceramics
DOI:10.1016/j.jallcom.2011.09.048  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:9  AU: Zhang, Bo;Zhao, Qing;Chang, Aimin;Yao, Jincheng;Zhao, Pengjun;Guan, Fang;Kong, Wenwen;
7:7:2:3:4     Structure and electrical performance of Mn1.5-0.5xCo0.9-0.3xNi0.6-0.2xCuxO4 NTC ceramics prepared by heterogeneous precipitation
DOI:10.1016/j.jallcom.2014.04.019  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Xiong, Kai;Zhao, Shi-Xi;Li, Deng-Feng;Bao, Han-Qing;Nan, Ce-Wen;
7:7:2:3:5     Study on the preparation and electrical properties of NTC thick film thermistor deposited by supersonic atmospheric plasma spraying
DOI:10.1016/j.apsusc.2011.06.029  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:5  AU: Liang, Sen;Zhang, Xiao;Bai, Yu;Han, ZhiHai;Yang, Jianfeng;
7:7:2:3:6     Complex impedance spectroscopy of manganese oxide thin films
DOI:10.1063/1.3273319  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Lee, J. H.;Chou, Hsiung;Wen, G. H.;Hwang, G. H.;
7:7:2:3:7     Optical and structural properties of solution deposited nickel manganite thin films
DOI:10.1016/j.tsf.2010.11.088  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Podraza, N. J.;Saint John, D. B.;Ko, S. W.;Schulze, H. M.;Li, J.;Dickey, E. C.;Trolier-McKinstry, S.;
7:7:2:3:8     Structural and electrical characteristics of Sr(Fe2/3W1/3)O-3 ceramics
DOI:10.1016/j.matchar.2010.05.001  JN:MATERIALS CHARACTERIZATION  PY:2010
  TC:2  AU: Choudhary, R. N. P.;Pradhan, Dillip K.;Tirado, C. M.;Bonilla, G. E.;Katiyar, R. S.;
7:7:2:3:9     Electrical properties of lead-free thick film NTC thermistors based on perovskite-type (BaCoxCo2xBi1-3xO3)-Co-II-Bi-III
DOI:10.1016/j.matlet.2010.12.013  JN:MATERIALS LETTERS  PY:2011
  TC:6  AU: Yuan, C. L.;Liu, X. Y.;Zhou, C. R.;Xu, J. W.;Li, B.;
7:7:2:4:1     Structure and physical properties of nickel manganite NiMn2O4 obtained from nickel permanganate precursor
DOI:10.1016/j.jeurceramsoc.2010.04.032  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:19  AU: Diez, Alejandra;Schmidt, Rainer;Sagua, Aurora E.;Frechero, Marisa A.;Matesanz, Emilio;Leon, Carlos;Moran, Emilio;
7:7:2:4:2     Structural, electrical and magnetic properties of nickel manganite obtained by a complex polymerization method
DOI:10.1016/j.ceramint.2014.07.024  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Savic, S. M.;Tadic, M.;Jaglicic, Z.;Vojisavljevic, K.;Mancic, L.;Brankovic, G.;
7:7:2:4:3     Ferrimagnetism and spin excitation in a Ni-Mn partially inverted spinel prepared using a modified polymeric precursor method
DOI:10.1016/j.matchemphys.2014.02.042  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Ferreira, Rafael A.;Tedesco, Julio C. G.;Birk, Jonas O.;Kalceff, Walter;Yokaichiya, Fabiano;Rasmussen, Nina;Pena, Octavio;Henry, Paul F.;Simeoni, Giovanna G.;Bordallo, Heloisa N.;Lisboa-Filho, Paulo N.;
7:7:2:4:4     Neutron structural characterization, inversion degree and transport properties of NiMn2O4 spinel prepared by the hydroxide route
DOI:10.1016/j.materresbull.2012.03.012  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:3  AU: Sagua, A.;Lescano, Gabriela M.;Alonso, J. A.;Martinez-Coronado, R.;Fernandez-Diaz, M. T.;Moran, E.;
7:7:2:5:1     LaNiO3 conducting particle dispersed NiMn2O4 nanocomposite NTC thermistor thick films by aerosol deposition
DOI:10.1016/j.jallcom.2012.04.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Kang, Ju-Eun;Ryu, Jungho;Han, Guifang;Choi, Jong-Jin;Yoon, Woon-Ha;Hahn, Byung-Dong;Kim, Jong-Woo;Ahn, Cheol-Woo;Choi, Joon Hwan;Park, Dong-Soo;
7:7:2:5:2     Flexible Miniaturized Nickel Oxide Thermistor Arrays via Inkjet Printing Technology
DOI:10.1021/am404872j  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:2  AU: Huang, Chun-Chih;Kao, Zhen-Kai;Liao, Ying-Chih;
7:7:2:5:3     Ni-Containing Conducting Ceramic as an Oxidation Protective Coating on Metallic Interconnects by Aerosol Deposition
DOI:10.1111/j.1551-2916.2010.03646.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Choi, Jong-Jin;Ryu, Jungho;Hahn, Byung-Dong;Yoon, Woon-Ha;Lee, Byoung-Kuk;Choi, Joon-Hwan;Park, Dong-Soo;
7:7:3:1     Extrinsic origins of the apparent relaxorlike behavior in CaCu3Ti4O12 ceramics at high temperatures: A cautionary tale
DOI:10.1063/1.3572256  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:51  AU: Li, Ming;Sinclair, Derek C.;West, Anthony R.;
7:7:3:2     Oxygen-vacancy-related dielectric relaxations in SrTiO3 at high temperatures
DOI:10.1063/1.4794349  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:27  AU: Wang, C. C.;Lei, C. M.;Wang, G. J.;Sun, X. H.;Li, T.;Huang, S. G.;Wang, H.;Li, Y. D.;
7:7:3:3     Origin of high-temperature relaxor-like behavior in CaCu3Ti4O12
DOI:10.1063/1.4745014  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:19  AU: Wang, Chun-Chang;Zhang, Mei-Ni;Xu, Ke-Biao;Wang, Guo-Jing;
7:7:3:4     Relaxor- and phase-transition-like behaviors in ZnO single crystals at high temperatures
DOI:10.1063/1.4796136  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Liu, L. N.;Wang, C. C.;Lei, C. M.;Li, T.;Wang, G. J.;Sun, X. H.;Wang, J.;Huang, S. G.;Li, Y. D.;Wang, H.;
7:7:3:5     Origin of dielectric anomaly in double perovskite Ba2CoNbO6
DOI:10.1016/j.ceramint.2014.06.046  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Wang, G. J.;Wang, C. C.;Huang, S. G.;Wang, J.;Liu, L. N.;
7:7:3:6     Dielectric properties of ErFeO3 ceramics over a broad temperature range
DOI:10.1016/j.jallcom.2014.08.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Ye, J. L.;Wang, C. C.;Ni, W.;Sun, X. H.;
7:7:3:7     High-Temperature Dielectric Relaxation in Pb(Mg1/3Nb2/3)O-3-PbTiO3 Single Crystals
DOI:10.1111/jace.12210  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:9  AU: Wang, Chunchang;Zhang, Meini;Xia, Wei;
7:7:3:8     High temperature dielectric relaxation anomaly of Y3+ and Mn2+ doped barium strontium titanate ceramics
DOI:10.1063/1.4896548  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Yan, Shiguang;Mao, Chaoliang;Wang, Genshui;Yao, Chunhua;Cao, Fei;Dong, Xianlin;
7:7:3:9     Pseudo-relaxor behavior in Na1/2Bi1/2Cu3Ti4O12 ceramics
DOI:10.1016/j.materresbull.2014.08.043  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:1  AU: Liang, Pengfei;Li, Yanyan;Chao, Xiaolian;Yang, Zupei;
7:7:3:10     Dielectric Relaxations and Phase Transition in Laser Crystals Gd2SiO5 and Yb-Doped Gd2SiO5
DOI:10.1111/jace.12807  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:2  AU: Liu, Lina;Wang, Chunchang;Zhang, Deming;Zhang, Qinling;Ning, Kaijie;Wang, Jing;Sun, Xiaohong;
7:7:3:11     Origin of the colossal dielectric properties in double-perovskite Sr2CoNbO6
DOI:10.1063/1.4791763  JN:AIP ADVANCES  PY:2013
  TC:3  AU: Wang, G. J.;Wang, C. C.;Huang, S. G.;Sun, X. H.;Lei, C. M.;Li, T.;Liu, L. N.;
7:7:4:1     Oxygen-vacancy-related relaxation and scaling behaviors of Bi0.9La0.1Fe0.98Mg0.02O3 ferroelectric thin films
DOI:10.1103/PhysRevB.82.024102  JN:PHYSICAL REVIEW B  PY:2010
  TC:44  AU: Ke, Qingqing;Lou, Xiaojie;Wang, Yang;Wang, John;
7:7:4:2     Oxygen-vacancy-related relaxation and conduction behavior in (Pb1-xBax)(Zr0.95Ti0.05)O-3 ceramics
DOI:10.1063/1.4900610  JN:AIP ADVANCES  PY:2014
  TC:2  AU: Zhang, Tian-Fu;Tang, Xin-Gui;Liu, Qiu-Xiang;Lu, Sheng-Guo;Jiang, Yan-Ping;Huang, Xian-Xiong;Zhou, Qi-Fa;
7:7:4:3     Oxygen-vacancy-related high-temperature dielectric relaxation in SrTiO3 ceramics
DOI:10.1063/1.3430987  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:23  AU: Wang, Xiaofei;Lu, Xiaomei;Zhang, Chao;Wu, Xiaobo;Cai, Wei;Peng, Song;Bo, Huifeng;Kan, Yi;Huang, Fengzhen;Zhu, Jinsong;
7:7:4:4     Large dielectric permittivity and possible correlation between magnetic and dielectric properties in bulk BaFeO3-delta
DOI:10.1063/1.4892064  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Sagdeo, Archna;Gautam, Kamini;Sagdeo, P. R.;Singh, M. N.;Gupta, S. M.;Nigam, A. K.;Rawat, Rajeev;Sinha, A. K.;Ghosh, Haranath;Ganguli, Tapas;Chakrabarti, Aparna;
7:7:4:5     Modulation of electric conduction in La-Mg codoped multiferroic BiFeO3 ceramics
DOI:10.1016/j.jallcom.2014.03.072  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Xi, X. J.;Wang, S. Y.;Liu, W. F.;Wang, H. J.;Guo, F.;Wang, X.;Gao, J.;Li, D. J.;
7:7:4:6     Oxygen-vacancy-mediated negative differential resistance in La and Mg co-substituted BiFeO3 thin film
DOI:10.1063/1.3668119  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Ke, Qingqing;Kumar, Amit;Lou, Xiaojie;Zeng, Kaiyang;Wang, John;
7:7:4:7     Dielectric relaxations and phase-transition-like behavior in SmAlO3 ceramics at high temperatures
DOI:10.1007/s10853-013-7549-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:3  AU: Lei, Changmei;Wang, Chunchang;Li, Teng;Wang, Guojing;Sun, Xiaohong;Liu, Lina;Wang, Jing;
7:7:4:8     Oxygen-vacancy-related relaxations of Sr3CuNb2O9 at high temperatures
DOI:10.1016/j.jallcom.2012.10.081  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Liu, Lina;Wang, Chunchang;Sun, Xiaohong;Wang, Guojing;Lei, Changmei;Li, Teng;
7:7:4:9     Enhanced Electrical Properties of Bi0.9Gd0.1Fe0.975B0.025O3 +/-delta, (B = Ni, Mn, Cu, Ti, and V) Thin Films
DOI:10.1080/00150193.2014.923671  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kim, J. W.;Kim, S. S.;Bhalla, A. S.;
7:7:4:10     Synthesis of SmAlO3 nanocrystalline powders by polymeric precursor method
DOI:10.1007/s00339-011-6263-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:4  AU: Li, Jiamao;Qiu, Tai;
7:7:4:11     Effect of Pr substitution on structural and dielectric properties of SrTiO3
DOI:10.1063/1.4747937  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Wang, Xiaofei;Hu, Qiubo;Li, Liben;Lu, Xiaomei;
7:7:5:1     Structural, dielectric and electrical properties of BaFe0.5Nb0.5O3 ceramic prepared by solid-state reaction technique
DOI:10.1016/j.matchemphys.2011.10.017  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:14  AU: Ganguly, M.;Parida, S.;Sinha, E.;Rout, S. K.;Simanshu, A. K.;Hussain, A.;Kim, I. W.;
7:7:5:2     High-temperature impedance spectroscopy of BaFe0.5Nb0.5O3 ceramics doped with Bi0.5Na0.5TiO3
DOI:10.1007/s00339-013-7735-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Huang, Yanmin;Shi, Danping;Liu, Laijun;Li, Guizhong;Zheng, Shaoying;Fang, Liang;
7:7:5:3     Study of structural, dielectric and electrical behavior of (1-x)Ba(Fe0.5Nb0.5)O-3-xSrTiO(3) ceramics
DOI:10.1016/j.jallcom.2010.11.168  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:18  AU: Singh, N. K.;Kumar, Pritam;Rai, Radheshyam;
7:7:5:4     Microstructure and Electrical Properties of BaFe0.5Nb0.5O3 Doped with GeO2 (1-5 wt.%)
DOI:10.1080/00150193.2011.634740  JN:FERROELECTRICS  PY:2011
  TC:6  AU: Kantha, P.;Pisitpipathsin, N.;Pengpat, K.;Rujijanagul, G.;Guo, R.;Bhalla, Amar S.;
7:7:5:5     Preparation and electrical properties of (1-x)Ba(Fe0.5Nb0.5)O-3-xBaTiO(3) ceramics
DOI:10.1016/j.ceramint.2011.09.039  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:10  AU: Yang, Haibo;Yang, Yanyan;Lin, Ying;Zhu, Jianfeng;Wang, Fen;
7:7:5:6     Effects of BaO-B2O3-SiO2 glass additive on dielectric properties of Ba(Fe0.5Nb0.5)O-3 ceramics
DOI:10.1016/j.materresbull.2014.01.025  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Wang, Zhuo;Li, Hai Juan;Zhang, Liang Liang;Pu, Yong Ping;
7:7:5:7     Giant dielectric permittivity and room temperature magnetodielectric study of BaTi0.2(Fe0.5Nb0.5)(0.8)O-3 nanoceramic
DOI:10.1016/j.materresbull.2012.12.041  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:5  AU: Patel, Piyush Kumar;Yadav, K. L.;
7:7:5:8     Structure and dielectric properties of sodium-doped Ba(FeNb)(0.5)O-3
DOI:10.1016/j.mseb.2010.06.003  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:13  AU: Liao, Kun-Feng;Chang, Yee-Shin;Chai, Yin-Lai;Tsai, Yeou-Yih;Chen, Hao-Long;
7:7:5:9     Structure and Dielectric Properties of Lead-Free BaSn0.1Ti0.9O3-BaFe0.5Nb0.5O3 Ceramics
DOI:10.1080/00150193.2013.850006  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kantha, Puripat;Pisitpipathsin, Nuttapon;Eitssayeam, Sukum;Pengpat, Kamonpan;Pojprapai, Soodkhet;
7:7:5:10     Origin of giant dielectric constant and magnetodielectric study in Ba(Fe0.5Nb0.5)O-3 nanoceramics
DOI:10.1016/j.jallcom.2013.12.119  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:8  AU: Patel, Piyush Kumar;Yadav, K. L.;Singh, Harishchandra;Yadav, A. K.;
7:7:5:11     Dielectric Relaxation and Electrical Properties of Lead-Free Perovskite BaGex(Fe0.5Nb0.5)(1-x)O-3 Ceramic
DOI:10.1080/00150193.2014.922857  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Kantha, P.;Pisitpipathsin, N.;Pengpat, K.;Eitssayeam, S.;Rujijanagul, G.;Guo, R.;Bhalla, Amar S.;
7:7:5:12     Structural and Dielectric Properties of Ca Doped Barium Iron Niobate
DOI:10.1080/10584587.2014.956591  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:1  AU: Puri, Maalti;Bahel, Shalini;Narang, S. Bindra;
7:7:5:13     Origin of giant dielectric constant in Ba[(Fe1-xCox)(1/2)Nb-1/2]O-3
DOI:10.1016/j.jallcom.2010.10.045  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:13  AU: Shah, Devang D.;Mehta, P. K.;Desai, M. S.;Panchal, C. J.;
7:7:5:14     Ba0.4Sr0.6(Fe0.5Nb0.5)O-3 ceramics with extended giant dielectric constant step and reduced dielectric loss
DOI:10.1016/j.jallcom.2013.10.088  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Wang, Zhuo;Zhang, Liang Liang;Pu, Yong Ping;
7:7:5:15     Effects of GeO2 addition on physical and electrical properties of BaFe0.5Nb0.5O3 ceramic
DOI:10.1016/j.materresbull.2012.04.098  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Kantha, P.;Pisitpipathsin, N.;Pengpat, K.;Eitssayeam, S.;Rujijanagul, G.;Gua, R.;Bhalla, Amar S.;
7:7:5:16     Structural, dielectric and electrical properties of BaFe0.5Nb0.5O3 ceramic prepared by solid-state reaction technique (vol 131, pg 535, 2011)
DOI:10.1016/j.matchemphys.2011.12.045  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:0  AU: Ganguly, M.;Parida, S.;Sinha, E.;Rout, S. K.;Himanshu, A. K.;Hussain, A.;Kim, I. W.;
7:7:6:1     Multi-functional properties of CaCu3Ti4O12 thin films
DOI:10.1063/1.4751344  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Felix, A. A.;Rupp, J. L. M.;Varela, J. A.;Orlandi, M. O.;
7:7:6:2     CaCu3Ti4O12 thin film capacitors: Evidence of the presence of a Schottky type barrier at the bottom electrode
DOI:10.1016/j.tsf.2011.11.023  JN:THIN SOLID FILMS  PY:2012
  TC:10  AU: Bodeux, Romain;Gervais, Monique;Wolfman, Jerome;Autret-Lambert, Cecile;Liu, Guozhen;Gervais, Francois;
7:7:6:3     The trap state relaxation related polarization in CaCu3Ti4O12
DOI:10.1063/1.3437634  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Luo, X. J.;Yang, C. P.;Chen, S. S.;Song, X. P.;Wang, H.;Baerner, K.;
7:7:6:4     Annealing effects on electrical properties and defects of CaCu3Ti4O12 thin films deposited by pulsed laser deposition
DOI:10.1103/PhysRevB.81.224111  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Deng, Guochu;Muralt, Paul;
7:7:6:5     Electric and dielectric behavior of CaCu3Ti4O12-based thin films obtained by soft chemical method
DOI:10.1016/j.jallcom.2011.07.098  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:9  AU: Ramirez, M. A.;Simoes, A. Z.;Felix, A. A.;Tararam, R.;Longo, E.;Varela, J. A.;
7:7:6:6     Correlation between the trap state spectra and dielectric behavior of CaCu3Ti4O12
DOI:10.1557/jmr.2010.46  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:5  AU: Baerner, K.;Luo, X. J.;Song, X. P.;Hang, C.;Chen, S. S.;Medvedeva, I. V.;Yang, C. P.;
7:7:6:7     Time-resolved spatial distribution of plasma in the ablation of a Ba0.6Sr0.4TiO3 target by 25 ns KrF ultraviolet laser
DOI:10.1063/1.4897223  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Lagrange, J. F.;Hermann, J.;Wolfman, J.;Motret, O.;
7:7:6:8     Voltage dependent capacitances in CaCu3Ti4O12
DOI:10.1063/1.3562180  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Luo, Xiao-jing;Yang, Chang-ping;Song, Xue-ping;Huang, Chang;Wang, Rui-long;Xu, Ling-fang;Baerner, K.;
7:7:6:9     Electric-pulse-induced resistance switching effect in the bulk of La0.5Ca0.5MnO3 ceramics
DOI:10.1063/1.4872216  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Wu, M. L.;Yang, C. P.;Shi, D. W.;Wang, R. L.;Xu, L. F.;Xiao, H. B.;Baerner, K.;
7:7:6:10     Electrical parameters of Schottky contacts in CaCu3Ti4O12 thin film capacitors
DOI:10.1007/s00339-014-8382-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Bodeux, Romain;Gervais, Monique;Wolfman, Jerme;Gervais, Francois;
7:7:6:11     Experimental evidence of enhanced ferroelectricity in Ca doped BiFeO3
DOI:10.1016/j.matchemphys.2014.01.022  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:3  AU: Costa, L. V.;Deus, R. C.;Foschini, C. R.;Longo, E.;Cilense, M.;Simoes, A. Z.;
7:7:6:12     Grain size effect on the giant dielectric and nonlinear electrical behaviors of Bi1/2Na1/2Cu3Ti4O12 ceramics
DOI:10.1007/s00339-012-6806-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Qiu, Yang;Yuan, Songliu;Tian, Zhaoming;Chen, Liang;Wang, Chuanhui;Duan, Hanning;Guo, Kai;
7:7:6:13     Slow Relaxation Processes in CCTO Detected by Capacitance Versus Voltage Curves
DOI:10.1111/jace.12042  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Luo, Xiao Jing;Yang, Chang Ping;Song, Xue Ping;Tang, Shao-Long;Xiao, Hai-Bo;Baerner, Klaus Herrmann Otto;
7:7:6:14     Influence of grain boundaries on the EPIR effect in Nd0.7Sr0.3MnO3 ceramics
DOI:10.1016/j.jallcom.2013.10.111  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Shi, Da-Wei;Yang, Chang-Ping;Chen, Shun-Sheng;Wang, Rui-Long;Xiao, Hai-Bo;Yang, Fu-jun;Baerner, K.;
7:7:6:15     Epitaxial composition-graded perovskite films grown by a dual-beam pulsed laser deposition method
DOI:10.1016/j.jcrysgro.2013.05.035  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:1  AU: Sakai, Joe;Autret-Lambert, Cecile;Sauvage, Thierry;Courtois, Blandine;Wolfman, Jerome;Gervais, Francois;
7:7:6:16     CaCu3Ti4O12 thin films on conductive oxide electrode: A comparative study between chemical and physical vapor deposition routes
DOI:10.1016/j.matchemphys.2012.02.024  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:2  AU: Catalano, Maria R.;Malandrino, Graziella;Bongiorno, Corrado;Toro, Roberta G.;Fiorenza, Patrick;Bodeux, Romain;Wolfman, Jerome;Gervais, Monique;Lambert, Cecile Autret;Gervais, Francois;Lo Nigro, Raffaella;
7:7:6:17     Slow Trap Charge Repositioning Processes and the Polarization of CaCu3Ti4O12
DOI:10.1111/j.1551-2916.2011.04417.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Luo, Xiao-Jing;Yang, Chang-Ping;Song, Xue-Ping;Chen, Shun-Sheng;Xu, Ling-Fang;Baerner, K.;
7:7:6:18     Comparison of electromagnetic transport between the bulk and interface of Nd0.7Sr0.3MnO3 ceramics
DOI:10.1016/j.mseb.2010.05.004  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:6  AU: Chen, S. S.;Yang, C. P.;Wang, H.;Medvedeva, I. V.;Baerner, K.;
7:7:7:1     Impedance and modulus studies of magnetic ceramic oxide Ba2Co2Fe12O22 (Co2Y) doped with Bi2O3
DOI:10.1063/1.3615935  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:22  AU: Costa, M. M.;Pires, G. F. M., Jr.;Terezo, A. J.;Graca, M. P. F.;Sombra, A. S. B.;
7:7:7:2     Colossal breakdown electric field and dielectric response of Al-doped CaCu3Ti4O12 ceramics
DOI:10.1016/j.mseb.2014.02.015  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:13  AU: Jia, Ran;Zhao, Xuetong;Li, Jianying;Tang, Xian;
7:7:7:3     Defects and dc electrical degradation in CaCu3Ti4O12 ceramics: Role of oxygen vacancy migration
DOI:10.1063/1.4720151  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Li, Jianying;Zhao, Xuetong;Gu, Fang;Li, Shengtao;
7:7:7:4     Intrinsic and extrinsic relaxation of CaCu3Ti4O12 ceramics: Effect of sintering
DOI:10.1063/1.3511444  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:28  AU: Li, J. Y.;Zhao, X. T.;Li, S. T.;Alim, Mohammad A.;
7:7:7:5     Role of defects in determining the electrical properties of ZnO ceramics
DOI:10.1063/1.4886416  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhao, Xuetong;Liao, Ruijin;Liang, Ningchuan;Yang, Lijun;Li, Jian;Li, Jianying;
7:7:7:6     Intrinsic and extrinsic defect relaxation behavior of ZnO ceramics
DOI:10.1063/1.4729804  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:13  AU: Zhao, Xuetong;Li, Jianying;Li, Huan;Li, Shengtao;
7:7:7:7     Dielectric properties of bismuth doped CaCu3Ti4O12 ceramics
DOI:10.1016/j.mseb.2012.02.001  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:8  AU: Xu, L. F.;Qi, P. B.;Chen, S. S.;Wang, R. L.;Yang, C. P.;
7:7:8:1     CaCu3Ti4O12 electrospun fibre: A new form of CaCu3Ti4O12 and its dielectric property
DOI:10.1016/j.jallcom.2012.09.083  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Qin, Dake;Liang, Guozheng;Gu, Aijuan;
7:7:8:2     CaCu3Ti4O12 ceramics from basic co-precipitation (BCP) method: Fabrication and properties
DOI:10.1016/j.jallcom.2010.12.010  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:14  AU: Lu, Junjie;Wang, Deqiang;Zhao, Chongjun;
7:7:8:3     Room temperature ferromagnetism observed in pure La0.5Sr0.5TiO3 nanofibers fabricated by electrospinning
DOI:10.1016/j.jallcom.2014.03.113  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Ponhan, Wichaid;Amornkitbamrung, Vittaya;Maensiri, Santi;
7:7:8:4     Dielectric properties of Nb-doped CaCu3Ti4O12 electroceramics measured at high frequencies
DOI:10.1016/j.jallcom.2009.12.137  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:24  AU: Sulaiman, Muhammad Azwadi;Hutagalung, Sabar D.;Ain, Mohd Fadzil;Ahmad, Zainal A.;
7:7:8:5     High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics
DOI:10.1016/j.jallcom.2011.02.145  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Sulaiman, Muhammad Azwadi;Hutagalung, Sabar D.;Mohamed, Julie J.;Ahmad, Zainal A.;Ain, Mohd Fadzil;Ismail, Bakar;
7:7:8:6     Investigation on effects of CuO secondary phase on dielectric properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2013.02.035  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Yuan, Wen-Xiang;Luo, Zhongkuan;Wang, Chundong;
7:7:8:7     An effective way to tune the microstructure and dielectric properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2010.06.060  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Zheng, X. H.;Zhang, C.;Liang, B. L.;Tang, D. P.;Huang, X.;Liu, X. L.;
7:7:8:8     Structure and electrical response of CaCu(3)Ti(4)o(12) ceramics: Effect of heat treatments at the high vacuum
DOI:10.1016/j.jallcom.2010.06.155  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:13  AU: Li, Jian-ying;Xu, Tong-wen;Li, Sheng-tao;Jin, Hai-yun;Li, Wen;
7:7:8:9     Magnetic phase composition of strontium titanate implanted with iron ions
DOI:10.1016/j.materresbull.2011.08.057  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:5  AU: Dulov, E. N.;Ivoilov, N. G.;Strebkov, O. A.;Tagirov, L. R.;Nuzhdin, V. I.;Khaibullin, R. I.;Kazan, S.;Mikailzade, F. A.;
7:7:8:10     Magnetic properties of Fe implanted SrTiO3 perovskite crystal
DOI:10.1016/j.materresbull.2013.04.011  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Sale, A. G.;Kazan, S.;Gatiiatova, Ju. I.;Valeev, V. F.;Khaibullin, R. I.;Mikailzade, F. A.;
7:7:8:11     Effect of new poly(amide-co-imide)/poly(trimellitic anhydride chloride-co-4,4 '-methylenedianiline) blends on nanofiber web formation
DOI:10.1039/c2jm15807h  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:4  AU: Bajaj, Bharat;Lee, Seunghwan;Yoon, Sangjun;Park, Byeonghee;Kim, Bin;Park, Byungki;Lee, Jaerock;
7:7:9:1     Invited Paper: Dielectric Properties of CaCu3Ti4O12 Polycrystalline Ceramics
DOI:10.1007/s13391-011-1060-4  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:9  AU: Lee, Sung Yun;Hong, Youn Woo;Yoo, Sang Im;
7:7:9:2     Improved dielectric properties of BaTiO3-added CaCu3Ti4O12 polycrystalline ceramics
DOI:10.1007/s13391-013-2202-7  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:7  AU: Kim, Hui Eun;Choi, Soon-Mi;Lee, Sung-Yun;Hong, Youn-Woo;Yoo, Sang-Im;
7:7:9:3     Duty Ratio-Controlled Surface Roughness of Silicon Nitride Film deposited using Room-Temperature SiH4-NH3-N-2 Plasma
DOI:10.3365/eml.2010.12.161  JN:ELECTRONIC MATERIALS LETTERS  PY:2010
  TC:9  AU: Kim, Daehyun;Kim, Byungwhan;Seo, Yong-Ho;
7:7:9:4     Synthesis and Characterization of CdS Nanocrystals in a Novel Phosphate Glass
DOI:10.1007/s13391-011-0120-0  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:4  AU: Kim, Donghwan;Hwang, Chawon;Gwoo, Donggun;Kim, Taehee;Kim, Youngseok;Kim, Namjin;Ryu, Bong Ki;
7:7:9:5     Effect of Titanium on Structure of Sodium Borophosphate Glasses
DOI:10.1007/s13391-011-0710-x  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:3  AU: Kim, Donghwan;Hwang, Chawon;Gwoo, Donggun;Kim, Taehee;Kim, Namjin;Ryu, Bong-Ki;
7:7:9:6     Comparative dielectric studies of nanostructured BaTiO3, CaCu3Ti4O12 and 0.5BaTiO(3)center dot 0.5CaCu(3)Ti(4)O(12) nano-composites synthesized by modified sol-gel and solid state methods
DOI:10.1016/j.matchar.2014.07.019  JN:MATERIALS CHARACTERIZATION  PY:2014
  TC:4  AU: Singh, Laxman;Rai, Uma Shanker;Mandal, Kam Deo;Sin, Byung Cheol;Lee, Hyung-il;Chung, Hoeil;Lee, Youngil;
7:7:9:7     Two-Dimensional Dopant Profiling in p+/n Junctions Using Scanning Electron Microscope Coupled with Selective Electrochemical Etching
DOI:10.3365/eml.2010.06.055  JN:ELECTRONIC MATERIALS LETTERS  PY:2010
  TC:6  AU: Kil, Yeon-Ho;Jeong, Myeong-Il;Shim, Kyu-Hwan;Hong, Hyo-Bong;Yun, Hyung-Joong;Kang, Seung-Min;Ahn, Kwang-Soon;Choi, Chel-Jong;
7:7:9:8     Segregation and Thermal Dissociation of Hydrogen at the (110)/(001) Silicon Grain Boundary
DOI:10.3365/eml.2010.03.001  JN:ELECTRONIC MATERIALS LETTERS  PY:2010
  TC:8  AU: Park, Yongkook;Lu, Jinggang;Rozgonyi, George;
7:7:9:9     Improved dielectric properties of the CaCu3Ti4O12 composites using BaTiO3-coated powder as precursor
DOI:10.1016/j.jallcom.2014.04.215  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Kim, Hui Eun;Choi, Soon-Mi;Hong, Youn-Woo;Yoo, Sang-Im;
7:7:9:10     Mesoscopic Fluctuations of Electronic Structure Properties of Boron Phosphide Nanocrystals
DOI:10.3365/eml.2010.09.097  JN:ELECTRONIC MATERIALS LETTERS  PY:2010
  TC:9  AU: Abdulsattar, Mudar A.;
7:7:9:11     Gettering of Ni Silicide to Minimize the Leakage Current in Metal-Induced Crystallized Polycrystalline Silicon Thin-Film Transistors
DOI:10.1007/s13391-012-2001-6  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:7  AU: Byun, Chang Woo;Son, Se Wan;Lee, Yong Woo;Kang, Hyun Mo;Park, Seol Ah;Lim, Woo Chang;Li, Tao;Joo, Seung Ki;
7:7:9:12     Subsolidus phase relations in the SrO-CuO-TiO2 ternary system at 950 degrees C in air
DOI:10.1016/j.jallcom.2012.11.193  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Lee, Sung-Yun;Kim, Hui Eun;Yoo, Sang-Im;
7:7:9:13     Subsolidus Phase Relationship in the CaO-CuO-TiO2 Ternary System at 950 degrees C in Air
DOI:10.1111/jace.13119  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Lee, Sung-Yun;Kim, Hui Eun;Yoo, Sang-Im;
7:7:9:14     Trap States of a-ZnO Thin Film Transistors
DOI:10.3365/eml.2010.12.221  JN:ELECTRONIC MATERIALS LETTERS  PY:2010
  TC:14  AU: Yuh, Jin Tae;Bae, Byung Seong;
7:7:9:15     Growth and characterization of CaCu3Ti4O12 single crystals
DOI:10.1016/j.jcrysgro.2014.09.013  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:0  AU: Kim, Hui Eun;Yang, Sang-don;Lee, Jung-Woo;Park, Hyun Min;Yoo, Sang-Im;
7:7:10:1     Dielectric relaxation and polaronic conduction in double perovskite La2MgMnO6
DOI:10.1063/1.3377906  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:18  AU: Lin, Y. Q.;Chen, X. M.;
7:7:10:2     Structure and dielectric relaxation of double-perovskite La2CuTiO6 ceramics
DOI:10.1063/1.3446846  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:14  AU: Yang, W. Z.;Mao, M. M.;Liu, X. Q.;Chen, X. M.;
7:7:10:3     Low-Temperature Relaxations Associated with Mixed-Valent Structure in Sr2TiMnO6
DOI:10.1111/jace.12055  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Sun, Xiaohong;Wang, Chunchang;Wang, Guojing;Lei, Changmei;Li, Teng;Liu, Lina;
7:7:10:4     Impedance spectroscopic studies, dielectric properties and microstructure of rutile type chromium niobate CrNbO4
DOI:10.1016/j.ceramint.2014.04.053  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Santhosh, S.;Lakshminarasimhan, N.;
7:7:10:5     Origin of Colossal Dielectric Behavior In Double Perovskite Ba2CoNbO6
DOI:10.1111/jace.12318  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:6  AU: Wang, Guojing;Wang, Chunchang;Huang, Shouguo;Lei, Changmei;Sun, Xiaohong;Li, Teng;Liu, Lina;
7:7:10:6     Microstructural Origin of Magnetic and Giant Dielectric Behavior of Sr2MnTiO6-delta Perovskite Nanocrystals
DOI:10.1111/j.1551-2916.2010.03734.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Alvarez-Serrano, Inmaculada;Arillo, M. Angeles;Garcia-Hernandez, Mar;Luisa Lopez, M.;Pico, Carlos;Luisa Veiga, M.;
7:7:10:7     Structure, dielectric, and magnetic properties of Sr2TiMnO6 ceramics
DOI:10.1063/1.3500369  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Meher, K. R. S. Preethi;Savinov, M.;Kamba, S.;Goian, V.;Varma, K. B. R.;
7:7:10:8     Jahn-Teller assisted polaron hopping and associated dielectric response of PrFe0.5Mn0.5O2.95
DOI:10.1063/1.4821190  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Ganeshraj, C.;Kavita, S.;Mahendiran, R.;Sharma, Neetika;Das, A.;Santhosh, P. N.;
7:7:10:9     Polaronic relaxation in Ca2TiMnO6 at low temperatures
DOI:10.1016/j.materresbull.2012.04.022  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:0  AU: Wang, Guojing;Wang, Chunchang;Huang, Shouguo;Lei, Changmei;Sun, Xiaohong;Li, Teng;Mei, Jiyun;
7:7:10:10     Microstructure and colossal dielectric behavior of Ca2TiMnO6 ceramics
DOI:10.1016/j.scriptamat.2010.10.006  JN:SCRIPTA MATERIALIA  PY:2011
  TC:9  AU: Shi, Chen-Yang;Hao, Yong-Mei;Hu, Zhong-Bo;
7:7:10:11     Structural and magnetic properties of single perovskite Ca(Ti1/2Mn1/2)O-3
DOI:10.1016/j.jmmm.2011.02.037  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:1  AU: Shi, Chen-Yang;Hao, Yong-Mei;Hu, Zhong-Bo;
7:7:11:1     Anomalous Increase of Dielectric Permittivity in Sr-Doped CCTO Ceramics Ca1-xSrxCu3Ti4O12 (0 <= x <= 0. 2)
DOI:10.1021/cm903220z  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:22  AU: Schmidt, Rainer;Sinclair, Derek C.;
7:7:11:2     Quantum paraelectric glass state in SrCu3Ti4O12
DOI:10.1063/1.4885643  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Kumar, Jitender;Choudhary, Ram Janay;Awasthi, A. M.;
7:7:11:3     Nanoscale disorder and local electronic properties of CaCu3Ti4O12: An integrated study of electron, neutron, and x-ray diffraction, x-ray absorption fine structure, and first-principles calculations
DOI:10.1103/PhysRevB.81.144203  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Zheng, Jin-Cheng;Frenkel, A. I.;Wu, L.;Hanson, J.;Ku, W.;Bozin, E. S.;Billinge, S. J. L.;Zhu, Yimei;
7:7:11:4     Effect of dispersant on CaCu3Ti4O12 powders synthesized by oxalate co-precipitation method
DOI:10.1016/j.matlet.2012.09.093  JN:MATERIALS LETTERS  PY:2013
  TC:7  AU: Zhao, Yanhui;Gao, Rongjie;Su, Ge;Lin, Hui;Wang, Chuanxiu;Cheng, Congpeng;
7:7:11:5     Correlation Between Photoluminescence and Structural Defects in Ca1+xCu3-xTi4O12 Systems
DOI:10.1111/jace.12020  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Oliveira, Larissa H.;Paris, Elaine C.;Avansi, Waldir;Ramirez, Miguel A.;Mastelaro, Valmor R.;Longo, Elson;Varela, Jose A.;
7:7:11:6     High-Pressure Synthesis, Structure, Dielectric and Magnetic Properties for SrCu3Ti4O12
DOI:10.1080/00150193.2011.577336  JN:FERROELECTRICS  PY:2011
  TC:4  AU: Mori, Daisuke;Shimoi, Manabu;Kato, Yuji;Katsumata, Tetsuhiro;Hiraki, Ko-Ichi;Takahashi, Toshihiro;Inaguma, Yoshiyuki;
7:7:11:7     Microstructure, dielectric and pyroelectric properties of CaCu3Ti4O12 ceramics fabricated by tape-casting method
DOI:10.1016/j.materresbull.2013.05.026  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:5  AU: Fan, Huiqing;Zheng, Qian;Peng, Biaolin;
7:7:11:8     Correlation between the dielectric properties and local electronic structure of copper doped calcium titanate
DOI:10.1016/j.jallcom.2013.03.070  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Singh, Jitendra Pal;Gautam, Sanjeev;Kumar, Parmod;Tripathi, Ambuj;Chen, Jin-Ming;Chae, Keun Hwa;Asokan, K.;
7:7:11:9     Glassy domain wall matter in KH2PO4 crystal: Field-induced transition
DOI:10.1063/1.4821919  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Kumar, Jitender;Awasthi, A. M.;
7:7:11:10     Effect of the MgO substitution for CuO on the properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2011.12.059  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Hu, Yi;Jeng, Tian-Syuan;Liu, Jiun-Shing;
7:7:11:11     Crystal structure and ferroelectric properties of Ca(Cu3-xMx)Ti4O12 (M = Fe and Ni) ceramics
DOI:10.1016/j.mseb.2013.01.023  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:1  AU: Moriyama, Tohru;Kan, Akinori;Ogawa, Hirotaka;
7:7:11:12     Local structure and electron spin resonance of copper-doped SrTiO3 ceramics
DOI:10.1007/s10853-013-7213-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:2  AU: Laguta, V. V.;Scherbina, O. I.;Garmash, E. P.;Pavlikov, V. N.;Karpec, M. V.;Glinchuk, M. D.;Svechnikov, G. S.;
7:7:11:13     Sol-Gel Synthesis and Sensing Study of Perovskite CaCu3Ti4O12 Nanopowders
DOI:10.1080/10584587.2011.576948  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:2  AU: Tian, Yang;Zhang, Xiaojie;Yang, Yiyi;Liu, Zhen;Huang, Xiaozhu;
7:7:12:1     Effect of excess oxygen on crystal structures and dielectric responses of Nd2NiO4+delta ceramics
DOI:10.1016/j.jallcom.2013.06.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Liu, Guo;Chen, Ting Ting;Wang, Jian;Liu, Xiao Qiang;Chen, Xiang Ming;
7:7:12:2     Enhanced giant dielectric response in Al-substituted La1.75Sr0.25NiO4 ceramics
DOI:10.1016/j.jallcom.2010.07.163  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:9  AU: Liu, Xiao Qiang;Wu, Shu Ya;Chen, Xiang Ming;
7:7:12:3     Contribution of oxygen vacancies to the giant dielectric response in Sm1.5Sr0.5NiO4-delta ceramics
DOI:10.1007/s00339-014-8251-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Liu, G.;Liu, X. Q.;Chen, X. M.;
7:7:12:4     Structure, magnetic and dielectric properties in Mn-substituted Sm1.5Sr0.5NiO4 ceramics
DOI:10.1063/1.3639282  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Jia, Bo Wen;Liu, Xiao Qiang;Chen, Xiang Ming;
7:7:12:5     Giant dielectric response and polaronic hopping in Al-substituted A(5/3)Sr(1/3)NiO(4) (A=La, Nd) ceramics
DOI:10.1016/j.ceramint.2013.10.150  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Wang, J.;Liu, G.;Jia, B. W.;Liu, X. Q.;Chen, X. M.;
7:7:12:6     Giant dielectric response in (Sm1-xNdx)(1.5)Sr0.5NiO4 ceramics: The intrinsic and extrinsic effects
DOI:10.1063/1.4737775  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Jia, Bo Wen;Yang, Wen Zhi;Liu, Xiao Qiang;Chen, Xiang Ming;
7:7:12:7     Microstructure and modified giant dielectric response in Ga-doped La1.5Sr0.5NiO4 ceramics
DOI:10.1016/j.matlet.2012.05.099  JN:MATERIALS LETTERS  PY:2012
  TC:1  AU: Thongbai, Prasit;Yamwong, Teerapon;Maensiri, Santi;
7:7:12:8     Dielectric properties of La1.75Ba0.25NiO4 ceramics prepared by spark plasma sintering
DOI:10.1016/j.jallcom.2009.10.114  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Song, C. L.;Wu, Y. J.;Liu, X. Q.;Chen, X. M.;
7:7:12:9     Giant dielectric constant in Nd2NiO4+delta ceramics obtained by spark plasma sintering
DOI:10.1016/j.ceramint.2011.05.093  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:5  AU: Liu, X. Q.;Song, C. L.;Wu, Y. J.;Chen, X. M.;
7:7:12:10     Dielectric relaxation and polaronic hopping in the single-layered perovskite La1.5Sr0.5CoO4 ceramics
DOI:10.1007/s10853-011-5580-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:1  AU: Yang, W. Z.;Song, C. L.;Liu, X. Q.;Zhu, H. Y.;Chen, X. M.;
7:7:12:11     Structural, magnetic and dielectric properties of La2-xCaxNiO4+delta (x=0, 0 1, 0 2, 0 3)
DOI:10.1016/j.jallcom.2010.10.030  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:0  AU: Shi, Chen-Yang;Hu, Zhong-Bo;Hao, Yong-Mei;
7:7:12:12     Dielectric relaxation in LaSrCo1-x Al (x) O-4 ceramics
DOI:10.1007/s00339-010-5715-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:2  AU: Liu, Xiao Qiang;Yang, Wen Zhi;Song, Chang Lin;Chen, Xiang Ming;
7:7:13:1     An aqueous-solution based low-temperature pathway to synthesize giant dielectric CaCu3Ti4O12-Highly porous ceramic matrix and submicron sized powder
DOI:10.1016/j.jallcom.2010.12.137  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:16  AU: Banerjee, Nirupam;Krupanidhi, S. B.;
7:7:13:2     Mechanochemical synthesis and giant dielectric properties of CaCu3Ti4O12
DOI:10.1007/s00339-014-8224-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:2  AU: Ahmad, Mohamad M.;Al-Libidi, Eman;Al-Jaafari, Abdullah;Ghazanfar, Syed;Yamada, Koji;
7:7:13:3     Structural and phase evolution in mechanically alloyed calcium copper titanate dielectrics
DOI:10.1016/j.ceramint.2012.10.019  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:7  AU: Alizadeh, Morteza;Ardakani, Hamed Ahmadi;Amini, Rasool;Ghazanfari, Mohammad Reza;Ghaffari, Mohammad;
7:7:13:4     Grain size effect on the giant dielectric constant of CaCu3Ti4O12 nanoceramics prepared by mechanosynthesis and spark plasma sintering
DOI:10.1063/1.4871979  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Ahmad, Mohamad M.;Yamada, Koji;
7:7:13:5     Low dimensional fabrication of giant dielectric CaCu3Ti4O12 through soft e-beam lithography
DOI:10.1016/j.jallcom.2012.08.088  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:7  AU: Banerjee, Nirupam;Krupanidhi, S. B.;
7:7:13:6     Giant dielectric constant in CaCu3Ti4O12 nanoceramics
DOI:10.1063/1.4811154  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Ahmad, Mohamad M.;
7:7:13:7     Microstructure and dielectric property of hot-pressed high density CaCu3Ti4O12 ceramics
DOI:10.1016/j.jallcom.2013.01.042  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Hao, Wentao;Zhang, Jialiang;
7:7:13:8     The ionic conductivity and dielectric properties of Ba1-xSnxF2 solid solutions prepared by mechanochemical milling
DOI:10.1016/j.mseb.2013.05.011  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:2  AU: Ahmad, Mohamad M.;Yamane, Yohei;Yamada, Koji;
7:7:13:9     Abnormal dielectric behaviors in Mn-doped CaCu3Ti4O12 ceramics and their response mechanism
DOI:10.1016/j.mseb.2012.08.021  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:4  AU: Lin, Yuan-Hua;Deng, Wei;Xu, Wei;Liu, Yong;Chen, Dongliang;Zhang, Xiaoli;Nan, Ce-Wen;
7:7:13:10     Electrospun ZrO2 fibers obtained from polyvinyl alcohol/zirconium n-propoxide composite fibers processed through halide free sol-gel route using acetic acid as a stabilizer
DOI:10.1016/j.matlet.2013.10.026  JN:MATERIALS LETTERS  PY:2014
  TC:1  AU: Singh, Sarabjit;Singh, Vajinder;Vijayakumar, M.;Prasad, V. V. Bhanu;
7:7:14:1     Visible Light Photo-oxidation of Model Pollutants Using CaCu3Ti4O12: An Experimental and Theoretical Study of Optical Properties, Electronic Structure, and Selectivity
DOI:10.1021/ja1090832  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:19  AU: Clark, Joanna H.;Dyer, Matthew S.;Palgrave, Robert G.;Ireland, Christopher P.;Darwent, James R.;Claridge, John B.;Rosseinsky, Matthew J.;
7:7:14:2     Resistive-Switching Behavior in Polycrystalline CaCu3Ti4O12 Nanorods
DOI:10.1021/am101079g  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2011
  TC:7  AU: Tararam, R.;Joanni, E.;Savu, R.;Bueno, P. R.;Longo, E.;Varela, J. A.;
7:7:14:3     Anomalous change in dielectric constant of CaCu3Ti4O12 under violet-to-ultraviolet irradiation
DOI:10.1063/1.4807741  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Masingboon, C.;Eknapakul, T.;Suwanwong, S.;Buaphet, P.;Nakajima, H.;Mo, S. -K.;Thongbai, P.;King, P. D. C.;Maensiri, S.;Meevasana, W.;
7:7:14:4     Negative magnetodielectric effect in CaCu3Ti4O12
DOI:10.1063/1.4851815  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Chen, Kai;Huang, Chenxi;Zhang, Xirui;Yu, Yuanlie;Lau, Kenny;Hu, Wanbiao;Li, Qian;Wang, Jian;Lin, Weiwei;Liu, Junming;Qiu, Li;Zhu, Jinsong;Withers, Ray L.;
7:7:14:5     Discovery of strange kinetics in bulk material: Correlated dipoles in CaCu3Ti4O12
DOI:10.1063/1.4749398  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Awasthi, A. M.;Kumar, Jitender;
7:7:14:6     Cole-Cole Broadening in Dielectric Relaxation and Strange Kinetics
DOI:10.1103/PhysRevLett.105.037601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:20  AU: Puzenko, Alexander;Ben Ishai, Paul;Feldman, Yuri;
7:7:14:7     Low-Temperature Sputtering Deposition of Aligned Polycrystalline CaCu3Ti4O12 Nanorods
DOI:10.1111/j.1551-2916.2009.03390.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Joanni, Ednan;Savu, Raluca;Jancar, Bostjan;Bueno, Paulo R.;Varela, Jose A.;
7:7:14:8     Fractional power-law spectral response of CaCu3Ti4O12 dielectric: Many-body effects
DOI:10.1063/1.4745784  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Kumar, Jitender;Awasthi, A. M.;
7:7:14:9     Dielectric, modulus and impedance spectroscopic studies of nanostructured CaCu2.70Mg0.30Ti4O12 electro-ceramic synthesized by modified sol-gel route
DOI:10.1016/j.jallcom.2012.12.023  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:10  AU: Singh, L.;Rai, U. S.;Mandal, K. D.;
7:7:14:10     Single crystalline nanostructures of giant dielectric calcium copper titanate: a convenient route toward materialization of hard to realize multi-component perovskite nanostructures
DOI:10.1007/s10853-013-7205-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:2  AU: Sen, Arindam;Maiti, Uday Narayan;Maiti, Soumen;Chattopadhyay, Kalyan Kumar;
7:7:14:11     Reorientable dipolar Cu-Ca antisite and anomalous screening in CaCu3Ti4O12
DOI:10.1103/PhysRevB.81.081104  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Delugas, Pietro;Alippi, Paola;Fiorentini, Vincenzo;Raineri, Vito;
7:7:14:12     Photo-induced change of dielectric response in BaCoSiO4 stuffed tridymite
DOI:10.1063/1.4872032  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Taniguchi, Hiroki;Moriwake, Hiroki;Kuwabara, Akihide;Okamura, Takuma;Yamamoto, Takafumi;Okazaki, Ryuji;Itoh, Mitsuru;Terasaki, Ichiro;
7:7:14:13     Pyroelectric properties of CaCu3Ti4O12 thin films grown by pulsed laser deposition
DOI:10.1007/s00339-010-5612-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:1  AU: Chen, Cong;Ning, Tingyin;Lu, Heng;Wang, Can;Zhang, Dongxiang;Wang, Pei;Ming, Hai;Zhou, Yueliang;Yang, Guozhen;
7:7:15:1     X-ray diffraction and Raman spectroscopy studies of temperature and composition induced phase transitions in Ba2-xSrxMgTeO6 (0 <= x <= 2)
DOI:10.1016/j.jallcom.2014.03.037  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Tamraoui, Y.;Manoun, Bouchaib;Mirinioui, F.;Haloui, R.;Lazor, P.;
7:7:15:2     Potassium doping effects on the structure and magnetic properties of Sr2FeMoO6
DOI:10.1016/j.jallcom.2012.02.059  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Hu, Y. C.;Han, H. X.;Hu, H. J.;Zhang, K. L.;Wang, H. Y.;Jiang, Y. J.;Ma, H.;Lu, Q. F.;
7:7:15:3     Synthesis, structure, and high temperature Mossbauer and Raman spectroscopy studies of Ba1.6Sr1.4Fe2WO9 double perovskite
DOI:10.1016/j.jallcom.2010.08.082  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Manoun, B.;Benmokhtar, S.;Bih, L.;Azrour, M.;Ezzahi, A.;Ider, A.;Azdouz, M.;Annersten, H.;Lazor, P.;
7:7:15:4     Structure, Microstructure, and Microwave Dielectric Properties of (Sr2-xCax)(MgTe)O-6 Double Perovskites
DOI:10.1021/cm100486r  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:9  AU: Ubic, Rick;Letourneau, Steven;Thomas, Sherin;Subodh, G.;Sebastian, M. T.;
7:7:15:5     X-ray diffraction and Raman spectroscopy studies of temperature and composition induced phase transitions in Ba2-xSrxZnWO6 (0 <= x <= 2) double perovskite oxides
DOI:10.1016/j.jallcom.2012.03.075  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Manoun, Bouchaib;Ezzahi, A.;Benmokhtar, S.;Ider, A.;Lazor, P.;Bih, L.;Igartua, J. M.;
7:7:15:6     Preparation and electrical properties of perovskite ceramics in the system BaBi1-xSbxO3 (0 <= x <= 0.5)
DOI:10.1016/j.jallcom.2011.02.050  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Li, Xvqiong;Luo, Ying;Liu, Xinyu;
7:7:15:7     Gd induced the variations of anti-site defect and magnetism in the double perovskite oxides Sr2FeMoO6
DOI:10.1016/j.matchemphys.2010.06.031  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:9  AU: Hu, Y. C.;Ge, J. J.;Ji, Q.;Jiang, Z. S.;Wu, X. S.;Cheng, G. F.;
7:7:15:8     Synthesis, characterization and electrical properties of the system LaMnxFe1-xO3
DOI:10.1016/j.jallcom.2009.09.059  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:4  AU: Hankare, P. P.;Kadam, M. R.;Kamble, P. D.;Jadhav, S. D.;Sankpal, U. B.;Patil, R. P.;Helavi, V. B.;Gajbhiye, N. S.;
7:7:15:9     Phase transitions in heated Sr2MgTeO6 double perovskite oxide probed by X-ray diffraction and Raman spectroscopy
DOI:10.1063/1.4860515  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Manoun, Bouchaib;Tamraoui, Y.;Lazor, P.;Yang, Wenge;
7:7:15:10     Structural Transitions and Microwave Dielectric Properties of Ba2-2xSr2xSmSbO6 Double Perovskites
DOI:10.1111/j.1551-2916.2011.05064.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Zhou, Yuanyuan;Tian, Cailan;Meng, Siqin;Yue, Zhenxing;Li, Longtu;
7:7:15:11     Mixing of iron and molybdenum and photo-doping effect on Sr2FeMoO6
DOI:10.1016/j.jallcom.2009.11.148  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Hu, Y. C.;Ji, Q.;Ge, J. J.;Xie, R. B.;Jiang, Z. S.;Wu, X. S.;Cheng, G. F.;Liu, Hairui;Lu, Qingfeng;
7:7:15:12     Crystal Structure and Thermodynamic Properties of Barium-Thulium Bismuthate with Perovskite Structure
DOI:10.1111/jace.12304  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:0  AU: Bissengaliyeva, Mira R.;Knyazev, Alexander V.;Bekturganov, Nuraly S.;Gogol, Daniil B.;Taimassova, Shynar T.;Sukurov, Bolat M.;Smolenkov, Yuriy Y.;Tashuta, Galina N.;
7:7:15:13     First-principles study on the half-metallic Tc-doped Sr2FeReO6
DOI:10.1016/j.jmmm.2012.10.020  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:0  AU: Wang, Jing;Zhang, Jian-Min;Wang, Su-Fang;Xu, Ke-Wei;
7:7:16:1     Excess-electron induced polarization and magnetoelectric effect in yttrium iron garnet
DOI:10.1103/PhysRevB.82.104419  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Kohara, Y.;Yamasaki, Y.;Onose, Y.;Tokura, Y.;
7:7:16:2     The effect of sintering temperature on magnetic and dielectric properties of Ho3Fe5O12 ceramics
DOI:10.1007/s10853-011-5254-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:10  AU: Su, Jie;Lu, Xiaomei;Zhang, Chao;Zhang, Junting;Peng, Song;Wu, Xiaobo;Min, Kangli;Huang, Fengzhen;Zhu, Jinsong;
7:7:16:3     Study of mechanical and dielectric spectrum in YFe1-xMnxO3 ceramics
DOI:10.1063/1.4862301  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhu, Weili;He, Ju;Jin, Yaming;Ti, Ruixia;Xu, Tingting;Yue, Chen;Huang, Fengzhen;Lu, Xiaomei;Yan, Feng;Zhu, Jinsong;
7:7:16:4     The effect of Fe2+ ions on dielectric and magnetic properties of Yb3Fe5O12 ceramics
DOI:10.1063/1.3676450  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Su, Jie;Lu, Xiaomei;Zhang, Junting;Sun, Hui;Zhang, Chao;Jiang, Zhenghao;Ju, Changcheng;Wang, Zhijun;Huang, Fengzhen;Zhu, Jinsong;
7:7:16:5     Excess-hole induced high temperature polarized state and its correlation with the multiferroicity in single crystalline DyMnO3
DOI:10.1063/1.4892470  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zou, Tao;Dun, Zhiling;Cao, Huibo;Zhu, Mengze;Coulter, Daniel;Zhou, Haidong;Ke, Xianglin;
7:7:16:6     Ferroelectric Behavior and Magnetocapacitance Effect Caused by Fe2+ in Ho3Fe5O12 Ceramics
DOI:10.1080/00150193.2013.822291  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Su, Jie;Guo, Yunfeng;Zhang, Junting;Sun, Hui;He, Ju;Lu, Xiaomei;Lu, Chaojing;Zhu, Jinsong;
7:7:16:7     Tuning the ferroelectric state in multiferroic TbMnO3 single crystal by a trapped-charge-induced internal electric field
DOI:10.1063/1.4895074  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zou, Tao;Dun, Zhiling;Cao, Huibo;Zhu, Mengze;Zhou, Haidong;Ke, Xianglin;
7:7:16:8     Study on Mechanical and Dielectric Properties of Holmium Iron Garnet Ceramics
DOI:10.1080/10584587.2012.660410  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:0  AU: Su, J.;Zhang, C.;Wang, Z. J.;Zhang, J. T.;Sun, H.;Ju, C. C.;Min, K. L.;Lu, X. M.;Huang, F. Z.;Ying, X. N.;Zhu, J. S.;
7:7:16:9     The mechanical spectra of glycerol measured by a composite reed vibration method
DOI:10.1063/1.3636400  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Yuan, Y. H.;Ying, X. N.;Zhang, L.;
7:7:16:10     Quantum confinement effect on the vacancy-induced spin polarization in carbon, silicon, and germanium nanoparticles: Density functional analysis
DOI:10.1063/1.3302463  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Zhang, Zhenkui;Dai, Ying;Huang, Baibiao;Whangbo, Myung-Hwan;
7:7:17:1     Effect of calcining temperature on structural and dielectric properties of Li0.30Cr0.02Ni0.68O ceramics
DOI:10.1016/j.jallcom.2013.10.200  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Khumpaitool, Bualan;Khemprasit, Jinda;
7:7:17:2     Structural studies and magnetic and transport properties of Cr-substituted La0.67Ba0.33Mn1-xCrxO3 (0 <= x <= 0.15) perovskites
DOI:10.1016/j.jallcom.2012.04.026  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Oumezzine, Marwene;Pena, Octavio;Kallel, Sami;Guizouarn, Thierry;Oumezzine, Mohamed;
7:7:17:3     Origin of colossal permittivity in BaTiO3 via broadband dielectric spectroscopy
DOI:10.1063/1.4774099  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Han, Hyuksu;Voisin, Christophe;Guillemet-Fritsch, Sophie;Dufour, Pascal;Tenailleau, Christophe;Turner, Christopher;Nino, Juan C.;
7:7:17:4     Giant dielectric response and charge compensation of Li- and Co-doped NiO ceramics
DOI:10.1016/j.mseb.2012.03.054  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:5  AU: Li, Yunhua;Fang, Liang;Liu, Laijun;Huang, Yanming;Hu, Changzheng;
7:7:17:5     Dielectric properties of CaCu3Ti4O12 improved by chromium/lanthanum co-doping
DOI:10.1016/j.ceramint.2012.02.005  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:10  AU: Ardakani, Hamed Ahmadi;Alizadeh, Morteza;Amini, Rasool;Ghazanfari, Mohammad Reza;
7:7:17:6     Dielectric relaxation behaviour of Li and La co-doped NiO ceramics
DOI:10.1016/j.ceramint.2012.10.278  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Dakhel, A. A.;
7:7:17:7     Improvement in dielectric properties of Al2O3-doped Li0.30Cr0.02Ni0.68O ceramics
DOI:10.1016/j.matlet.2010.12.059  JN:MATERIALS LETTERS  PY:2011
  TC:4  AU: Khumpaitool, Bualan;Khemprasit, Jinda;
7:7:17:8     Effects of Li and Fe doping on dielectric relaxation behavior in (Li, Fe)-doped NiO ceramics
DOI:10.1016/j.matchemphys.2010.03.061  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:3  AU: Thongbai, Prasit;Yamwong, Teerapon;Maensiri, Santi;
7:7:17:9     Electrical and magnetic properties of La0.67Ba0.33Mn1-x (Me) (x) O-3 perovskite manganites: case of manganese substituted by trivalent (Me = Cr) and tetravalent (Me = Ti) elements
DOI:10.1007/s00339-013-7681-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Oumezzine, Marwene;Pena, Octavio;Kallel, Sami;Kallel, Nabil;Guizouarn, Thierry;Gouttefangeas, Francis;Oumezzine, Mohamed;
7:7:17:10     The effect of Cr dopant concentration on electrical property of (V1-xCrx)(2)O-3 nano-grain ceramics
DOI:10.1016/j.materresbull.2013.02.074  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Yan, Fang;Han, Weina;Wang, Xuedong;Chen, Juan;Wei, Liuya;
7:7:18:1     Electrical transport properties of manganese containing pyrochlore type semiconducting oxides using impedance analyses
DOI:10.1016/j.materresbull.2012.09.034  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:7  AU: Sumi, S.;Rao, P. Prabhakar;Mahesh, S. K.;Koshy, Peter;
7:7:18:2     Crystal structure and magnetic properties of double perovskite Mn2FeSbO6
DOI:10.1016/j.materresbull.2011.04.001  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:6  AU: Tyutyunnik, A. P.;Bazuev, G. V.;Kuznetsov, M. V.;Zainulin, Yu. G.;
7:7:18:3     Electron transport properties of bis[2-(2-hydroxyphenyl)-pyridine]beryllium investigated by impedance spectroscopy
DOI:10.1063/1.4882378  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Wang, Yanping;Chen, Jiangshan;Huang, Jinying;Ma, Dongge;Dong, Lisong;Chen, Hui;
7:7:18:4     Electrical conductivity of BaTi4O9 film prepared by laser chemical vapor deposition method
DOI:10.1007/s00339-012-6798-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Guo, Dongyun;Goto, Takashi;Wang, Chuanbin;Shen, Qiang;Zhang, Lianmeng;
7:7:18:5     Electrical conductivity and impedance spectroscopy studies of cerium based aeschynite type semiconducting oxides: CeTiMO6 (M = Nb or Ta)
DOI:10.1063/1.3481389  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Sumi, S.;Rao, P. Prabhakar;Deepa, M.;Koshy, Peter;
7:7:18:6     Synthesis, electrical and dielectric properties of (Na2O)(0.5)-(P2O5)(0.5) glass
DOI:10.1016/j.jallcom.2013.06.168  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Hraiech, S.;Ferid, M.;
7:7:18:7     Synthesis under usual conditions, X-ray photoelectron spectroscopy and magnetic properties of Re1-xMnxO2 oxides with rutile structure
DOI:10.1016/j.matchemphys.2010.07.057  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:4  AU: Bazuev, G. V.;Chupakhina, T. I.;Korolyov, A. V.;Kuznetsov, M. V.;
7:7:18:8     Ionic conductivity and dielectric relaxation studies of LiNaSO4 single crystal
DOI:10.1016/j.ssi.2010.04.035  JN:SOLID STATE IONICS  PY:2010
  TC:4  AU: Chen, R. H.;Tseng, Chaw-Ming;Shern, C. S.;Fukami, T.;
7:7:18:9     Sintering effect on electrical properties of Li2TiO3
DOI:10.1016/j.ssi.2013.12.031  JN:SOLID STATE IONICS  PY:2014
  TC:0  AU: Padhy, Romakanta;Rao, Nagamalleswara A.;Parashar, S. K. S.;Parashar, Kajal;Chaudhuri, Paritosh;
7:7:18:10     Magnetic properties of R2Mn2O7 pyrochlore rare-earth solid solutions
DOI:10.1103/PhysRevB.82.132407  JN:PHYSICAL REVIEW B  PY:2010
  TC:1  AU: Imamura, N.;Karppinen, M.;Yamauchi, H.;Goodenough, J. B.;
7:7:19:1     Defect studies of nanocrystalline zirconia powders and sintered ceramics
DOI:10.1103/PhysRevB.81.024116  JN:PHYSICAL REVIEW B  PY:2010
  TC:24  AU: Cizek, Jakub;Melikhova, Oksana;Prochazka, Ivan;Kuriplach, Jan;Kuzel, Radomir;Brauer, Gerhard;Anwand, Wolfgang;Konstantinova, Tatyana E.;Danilenko, Igor A.;
7:7:19:2     Dielectric properties of CaCu3Ti4O12 (CCTO) doped with GeO2
DOI:10.1016/j.jnoncrysol.2009.07.047  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2010
  TC:17  AU: Amaral, F.;Valente, M. A.;Costa, L. C.;
7:7:19:3     Nanoscale electromechanical properties of CaCu3Ti4O12 ceramics
DOI:10.1063/1.3623767  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Tararam, R.;Bdikin, I. K.;Panwar, N.;Varela, J. A.;Bueno, P. R.;Kholkin, A. L.;
7:7:19:4     Structural defects and non-ferroelectric piezoelectricity in an unpoled SrTiO3-Bi12TiO20 (ST-BT) composite ceramics
DOI:10.1016/j.scriptamat.2012.03.022  JN:SCRIPTA MATERIALIA  PY:2012
  TC:5  AU: Zhang, L. J.;Wang, T.;Wang, L. H.;Liu, J. D.;Zhao, M. L.;Ye, B. J.;
7:7:19:5     Defects versus grain size effects on the ferromagnetism of ZrO2 nanocrystals clarified by positron annihilation
DOI:10.1063/1.4790156  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Wang, D. D.;Qi, N.;Jiang, M.;Chen, Z. Q.;
7:7:19:6     Effect of NiO-doping on the microstructure and the dielectric properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2014.01.119  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Li, Tao;Chen, Jing;Liu, Dewei;Zhang, Zhixia;Chen, Zhenping;Li, Zhuoxin;Cao, Xingzhong;Wang, Baoyi;
7:7:19:7     Effect of cesium and cerium substitution on the dielectric properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2011.04.051  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Makcharoen, Worawut;Tontrakoon, Jerapong;Rujijanagul, Gobwute;Cann, David P.;Tunkasiri, Tawee;
7:7:19:8     Positron annihilation study of defect distribution in 8YSZ nanostructure
DOI:10.1016/j.ssi.2011.03.007  JN:SOLID STATE IONICS  PY:2011
  TC:1  AU: Gonzalo-Juan, Isabel;Parente, Paola;Javier Sanchez-Herencia, Antonio;Rubio, Fausto;Pareja, Ramiro;Ferrari, Begona;
7:7:20:1     New Negative Temperature Coefficient Ceramics in Ca-Ce-Nb-M-O (M=Mo or W) System
DOI:10.1111/j.1551-2916.2010.03616.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Deepa, Mannarakoth;Rao, Padala Prabhakar;Sumi, Sreedevi;Radhakrishnan, Ambiyil Narayana Pillai;Koshy, Peter;
7:7:20:2     Synthesis and NTC properties of YCr1-xMnxO3 ceramics sintered under nitrogen atmosphere
DOI:10.1016/j.jeurceramsoc.2010.12.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:13  AU: Kamlo, A. Ngueteu;Bernard, J.;Lelievre, C.;Houivet, D.;
7:7:20:3     Novel Functional Nitrile Butadiene Rubber/Magnetite Nano Composites for NTCR Thermistors Application
DOI:10.1002/app.34158  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2011
  TC:11  AU: Al-Juaid, Salih S.;El-Mossalamy, E. H.;Arafa, H. M.;Al-Ghamdi, A. A.;Daiem, A. M. Abdel;El-Tantawy, Farid;
7:7:20:4     The optimal synthesis condition by sol-gel method and electrical properties of Mn1.5-xCo1.5NixO4 ceramics
DOI:10.1016/j.ceramint.2013.12.133  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Zhang, Huimin;Chang, Aimin;Guan, Fang;Zhao, Lijun;Zhao, Qing;Yao, Jincheng;Huang, Xia;
7:7:20:5     La2O3-doped 0.6Y(2)O(3)-0.4YCr(0.5)Mn(0.5)O(3) composite NTC ceramics for wide range of temperature sensing
DOI:10.1016/j.jallcom.2013.07.060  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Zhang, Bo;Zhao, Qing;Chang, Aimin;Huang, Xia;Hou, Juan;Zhao, Pengjun;Ji, Guang;
7:7:20:6     Spark plasma sintering of MgAl2O4-YCr0.5Mn0.5O3 composite NTC ceramics
DOI:10.1016/j.jeurceramsoc.2014.03.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Zhang, Bo;Zhao, Qing;Chang, Aimin;Li, Yiyu;Liu, Yin;Wu, Yiquan;
7:7:20:7     Novel electromagnetic interference shielding effectiveness in the microwave band of magnetic nitrile butadiene rubber/magnetite nanocomposites
DOI:10.1002/app.36371  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2012
  TC:4  AU: Al-Ghamdi, A. A.;Al-Hartomy, Omar A.;Al-Salamy, F.;Al-Ghamdi, Attieh A.;El-Mossalamy, E. H.;Daiem, A. M. Abdel;El-Tantawy, Farid;
7:7:20:8     Negative temperature coefficient thermistor based on BaFe (x) Sn1-x O3-epsilon solid solutions
DOI:10.1007/s10853-010-4249-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:5  AU: Yuan, Changlai;Liu, Xinyu;Yang, Yun;Zhou, Changrong;
7:7:21:1     Magnetic and electric properties of the lead free ceramic composite based on the BFN and ferrite powders
DOI:10.1016/j.matchar.2013.10.027  JN:MATERIALS CHARACTERIZATION  PY:2014
  TC:4  AU: Bochenek, Dariusz;Niemiec, Przemyslaw;Chrobak, Artur;Ziolkowski, Grzegorz;Blachowski, Artur;
7:7:21:2     High dielectric constant observed in (1-x)Ba(Zr0.07Ti0.93)O-3-xBa(Fe0.5Nb0.5)O-3 binary solid-solution
DOI:10.1016/j.materresbull.2012.04.062  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:4  AU: Kruea-In, Chatchai;Eitssayeam, Sukum;Pengpat, Kamonpan;Rujijanagul, Gobwute;
7:7:21:3     Magnetoelectric coupling study in multiferroic Pb(Fe(0.5)Nb(0.5))O(3) ceramics through small and large electric signal standard measurements
DOI:10.1063/1.3585757  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Raymond, Oscar;Font, Reynaldo;Portelles, Jorge;Siqueiros, Jesus M.;
7:7:21:4     Properties of 0.94Bi(0.5)Na(0.5)TiO(3)-0.06BiAlO(3) Ceramics Prepared by Two Steps Sintering Technique
DOI:10.1080/00150193.2013.850366  JN:FERROELECTRICS  PY:2014
  TC:3  AU: Manotham, Supalak;Kruea-In, Chatchai;Rujijanagul, Gobwute;
7:7:21:5     Multiferroic properties and magnetoelectric coupling in highly textured Pb(Fe0.5Nb0.5)O-3 thin films obtained by RF sputtering
DOI:10.1016/j.actamat.2013.11.073  JN:ACTA MATERIALIA  PY:2014
  TC:4  AU: Raymond, Oscar;Ostos, Carlos;Font, Reynaldo;Curiel, Mario;Bueno-Baques, Dario;Machorro, Roberto;Mestres, Lourdes;Portelles, Jorge;Siqueiros, Jesus M.;
7:7:21:6     Ceramics With Tetragonal Tungsten Bronze Type Structure For Textured Ceramics-Polymer Composites
DOI:10.1080/00150193.2011.578912  JN:FERROELECTRICS  PY:2011
  TC:5  AU: Nogas-Cwikiel, E.;
7:7:21:7     Dielectric Characteristics and Tunability of Barium Zirconium Titanate Ceramics Prepared by Two-Step Sintering Method
DOI:10.1080/00150193.2011.577383  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Kruea-In, Chatchai;Eitssayeam, Sukum;Pengpat, Kamonpan;Tunkasiri, Tawee;Rujijanagul, Gobwute;
7:7:21:8     Uniaxial Pressure Effect on Dielectric Properties of 0.7Na(0. 5)Bi(0.5)TiO(3)-0.3SrTiO(3) Ceramics
DOI:10.1080/00150193.2014.893157  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Klimkowski, G.;Suchanicz, J.;Karpierz, M.;Lewczuk, U.;Faszczowy, I.;Konieczny, K.;Sitko, D.;Antonova, M.;Sternberg, A.;
7:7:21:9     Structural and dielectric properties of A(Fe1/2Ta1/2)O-3 [A = Ba, Sr, Ca]
DOI:10.1016/j.materresbull.2011.01.003  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:11  AU: Dutta, Alo;Sinha, T. P.;
7:7:22:1     Extension of thickness-dependent dielectric breakdown law on adiabatically compressed ferroelectric materials
DOI:10.1063/1.4791597  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Shkuratov, Sergey I.;Baird, Jason;Talantsev, Evgueni F.;
7:7:22:2     Origin of thickness dependent dc electrical breakdown in dielectrics
DOI:10.1063/1.4721809  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:11  AU: Chen, George;Zhao, Junwei;Li, Shengtao;Zhong, Lisheng;
7:7:22:3     Depolarization mechanisms of PbZr0.52Ti0.48O3 and PbZr0.95Ti0.05O3 poled ferroelectrics under high strain rate loading
DOI:10.1063/1.4879545  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Shkuratov, Sergey I.;Baird, Jason;Antipov, Vladimir G.;Talantsev, Evgueni F.;Jo, Hwan R.;Valadez, Juan C.;Lynch, Christopher S.;
7:7:22:4     Electric breakdown of longitudinally shocked Pb(Zr0.52Ti0.48)O-3 ceramics
DOI:10.1063/1.3609074  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Shkuratov, Sergey I.;Talantsev, Evgueni F.;Baird, Jason;
7:7:22:5     Phase transition study of integrated circuit chip power supplying based on ferroelectric ceramic
DOI:10.1063/1.3494534  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Zhang, Zhenhai;Cui, Zhanzhong;Yan, Jinglong;Li, Kejie;
7:7:22:6     Electroacoustic response of 1-3 piezocomposite transducers for high power applications
DOI:10.1063/1.4772482  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Lee, Hyeong Jae;Zhang, Shujun;Geng, Xuecang;Shrout, Thomas R.;
7:7:22:7     Characterization of piezoelectric ceramics and 1-3 composites for high power transducers
DOI:10.1063/1.4737651  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Lee, Hyeong Jae;Zhang, Shujun;Meyer, Richard J., Jr.;Sherlock, Nevin P.;Shrout, Thomas R.;
7:7:22:8     Micro-power generator supplying source for integrated circuit chip based on Pb(Sn,Zr,Ti)O-3 ferroelectric ceramic
DOI:10.1063/1.3569597  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Zhang, Zhenhai;Cui, Zhanzhong;Yan, Jinglong;Li, Kejie;
7:7:22:9     Numeric description of space charge in polyethylene under ac electric fields
DOI:10.1063/1.3524433  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Zhao, J.;Xu, Z.;Chen, G.;Lewin, P. L.;
7:7:22:10     Statistical behavior of electrical breakdown in insulating polymers
DOI:10.1063/1.3342468  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Wu, Kai;Wang, Yang;Cheng, Yonghong;Dissado, L. A.;Liu, Xiaojun;
7:7:23:1     Room temperature relaxor ferroelectricity and spin glass behavior in Sr2FeTiO6 double perovskite
DOI:10.1016/j.jallcom.2012.01.091  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:1  AU: Lekshmi, Neenu;Pillai, S. Savitha;Suresh, K. G.;Santhosh, P. N.;Varma, Manoj Raama;
7:7:23:2     Giant low frequency dielectric tunability in high-k Ba(Fe1/2Nb1/2)O-3 ceramics at room temperature
DOI:10.1063/1.3487472  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Ke, Shanming;Huang, Haitao;
7:7:23:3     Ferroelectric relaxor behavior and dielectric spectroscopic study of 0.99(Bi0.5Na0.5TiO3)-0.01(SrNb2O6) solid solution
DOI:10.1016/j.jallcom.2010.12.195  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Singh, K. N.;Bajpai, P. K.;
7:7:23:4     Synthesis, structure and magnetic properties of disordered SrBiMTiO6 (M=Fe, Mn, Cr) double perovskites
DOI:10.1016/j.ceramint.2014.05.048  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Yao, Chuangang;Meng, Fanzhi;Liu, Xiaojuan;Han, Lin;Meng, Junling;Liang, Qingshuang;Meng, Jian;
7:7:23:5     Dielectric and ferroelectric properties of BiFeO3 ceramics sintered in different atmospheres
DOI:10.1016/j.ceramint.2012.10.065  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Liu, Hongyong;Pu, Yongping;Shi, Xuan;Yuan, Qibin;
7:7:23:6     Phase development and dielectric responses in PMN-BNT ceramics
DOI:10.1016/j.ceramint.2010.01.003  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:3  AU: Jaitanong, N.;Vittayakorn, W. C.;Chaipanich, A.;
7:7:24:1     Low temperature dielectric relaxation in complex perovskite BaTi0.8(Ni0.5Nb0.5)(0.2)O-3 ceramics
DOI:10.1016/j.jallcom.2014.03.187  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Huang, Zhengliang;Zhang, Jingji;Ji, Ludong;Wang, Jiangying;Zhai, Jiwei;Yu, Faxin;
7:7:24:2     Correlations of dielectric properties with electronic structure and phonon vibration of low loss tunable Ba0.4Sr0.6Ti1-yMnyO3 ceramics
DOI:10.1063/1.3622337  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Zhang, Jingji;Zhai, Jiwei;Zhang, Yewen;
7:7:24:3     A study of the structure and dielectric properties for high-valence compensation of Bi3+ ion-doped Ba(FeTa)(0.5)O-3 ceramics
DOI:10.1016/j.jallcom.2013.11.022  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Chai, Yin-Lai;His, Chi-Shiung;Lin, You-Ting;Chang, Yee-Shin;
7:7:24:4     Structures and Microwave Dielectric Properties of Ba[Ti1-x(Co0.5W0.5)x]O3 (x=0.40-0.90) Perovskite Ceramics
DOI:10.1111/j.1551-2916.2011.05045.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Tian, Cailan;Yue, Zhenxing;Meng, Siqin;Zhou, Yuanyuan;
7:7:24:5     Dielectric abnormities in complex perovskite BaTi1-x(Co0.5Nb0.5)(x)O-3 ceramics
DOI:10.1016/j.matlet.2013.05.085  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Zhou, Min;Zhang, Jingji;Ji, Rudong;Wang, Jiangying;Yu, Faxin;
7:7:24:6     Structural and Dielectric Characteristics in (1-x)Ba(Ni1/2W1/2)O-3-xBaTiO(3) Perovskite Solid Solutions
DOI:10.1111/j.1551-2916.2009.03428.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Zhao, Fei;Yue, Zhenxing;Gui, Zhilun;Li, Longtu;
7:7:24:7     Relaxor behavior and dielectric properties of Ba1-xBi2x/3Zr0.15Ti0.85O3 solid solution
DOI:10.1016/j.jallcom.2013.12.118  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Bahri, Fathi;Khemakhem, Hamadi;
7:7:24:8     Microwave dielectric properties of Ba[Ti0.4Ga0.3Nb0.3(l-x)Sb0.3x]O-3 perovskite ceramics
DOI:10.1016/j.materresbull.2012.11.001  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:0  AU: Tian, Cailan;Yue, Zhenxing;Zhou, Yuanyuan;
7:7:25:1     Electrical behaviors of (1-x)BZT07-xBNWT lead free solid solution binary system
DOI:10.1007/s13391-013-0015-3  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:1  AU: Rujijanagul, Gobwute;Kruea-In, Chatchai;
7:7:25:2     Effects of NiO nanoparticles on electrical and magnetoelectric properties of BNT based ceramics
DOI:10.1007/s13391-013-6022-6  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:2  AU: Kruea-In, Chatchai;Glansuvarn, Thitima;Eitssayeam, Sukum;Pengpat, Kamonpan;Rujijanagul, Gobwute;
7:7:25:3     Phase Evolution and Grain-Boundary Contributions in CaCu3-xZnxTi4O12
DOI:10.1007/s13391-011-0500-5  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:3  AU: Kwon, Oh Hyeon;Kim, Byeong Kon;Jo, Yeon Hwa;Sankar, Paul Gouri;Jung, Yul Gyo;Jung, Tae Sung;Lee, Jung Won;Cho, Yong Soo;
7:7:25:4     Dielectric properties of (1-x)SrFe1/2Nb1/2O3-xBaZn(1/3)Ta(2/3)O(3) ceramics
DOI:10.1007/s13391-013-0036-y  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:0  AU: Phatungthane, Thanatep;Rujijanagul, Gobwute;
7:7:25:5     Electrical Properties of Lead-free (1-x)(Na0.5K0.5)NbO3-xBa(Zr0.52Ti0.48)O(3)Ceramics
DOI:10.1007/s13391-011-0904-2  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:5  AU: Lee, Dong-Hyun;Lee, Seung-Hwan;Choi, Eui-Sun;Lee, Sang-Chul;Lee, Young-Hie;
7:7:25:6     Crystallite Size Effect on Voltage Tunable Giant Dielectric Permittivity of Nanocrystalline CuO
DOI:10.1007/s13391-012-2091-1  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:3  AU: Prakash, T.;Murty, B. S.;Kaskhedikar, A. R.;Peshwe, P. D.;
7:7:25:7     Influence of bias voltage on dielectric relaxation of nanocrystalline anatase TiO2 using modulus formalism
DOI:10.1063/1.3567934  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Prakash, T.;Ramasamy, S.;Murty, B. S.;
7:7:25:8     Dielectric and Grain-Boundary Characteristics of Hot Pressed CaCu3Ti4O12
DOI:10.1111/j.1551-2916.2010.03738.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Kim, Byeong Kon;Lee, Hyung Sub;Lee, Jung Won;Lee, Seung Eun;Cho, Yong Soo;
7:7:26:1     Modified magnetic ground state in NiMn2O4 thin films
DOI:10.1103/PhysRevB.82.144419  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Nelson-Cheeseman, B. B.;Chopdekar, R. V.;Iwata, J. M.;Toney, M. F.;Arenholz, E.;Suzuki, Y.;
7:7:26:2     Thermomagnetic irreversibility and magnetic short range ordering in Mn2.5Co0.5O4 tetragonal spinel thin films
DOI:10.1063/1.3364051  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Kuo, K. M.;Chern, G.;Li, Y. Y.;Wang, C. R.;
7:7:26:3     Cation distribution in nickel manganese oxide
DOI:10.1063/1.3675151  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Cheng, S. L.;Lin, J. G.;Kuo, K. M.;Chern, Gung;
7:7:26:4     Structural and magnetic characterizations of Mn2CrO4 and MnCr2O4 films on MgO(001) and SrTiO3(001) substrates by molecular beam epitaxy
DOI:10.1063/1.3545802  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Jhuang, Yu-Cing;Kuo, K. M.;Chern, G.;
7:7:26:5     The magnetic Curie temperature and exchange coupling between cations in tetragonal spinel oxide Mn2.5M0.5O4 (M = Co, Ni, Mn, Cr, and Mg) films
DOI:10.1063/1.3672407  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Kuo, K.;Cheng, C. W.;Chern, G.;
7:7:26:6     The magnetization reversal and low field compensation in a Fe3O4/Mn3O4/Fe3O4 trilayer
DOI:10.1063/1.3562503  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Lin, S. C.;Kuo, K. M.;Chern, G.;
7:7:26:7     Magnetic properties of MnCr2O4 nanoparticle
DOI:10.1016/j.jmmm.2009.08.051  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:3  AU: Masrour, R.;Hamedoun, M.;Benyoussef, A.;
7:7:27:1     Nanoindentation of shock deformed alumina
DOI:10.1016/j.msea.2010.06.084  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2010
  TC:10  AU: Mukhopadhyay, Anoop K.;Joshi, Keshaw D.;Dey, Arjun;Chakraborty, Riya;Rav, Amit;Mandal, Ashok K.;Ghosh, Jiten;Bysakh, Sandip;Biswas, Sampad K.;Gupta, Satish C.;
7:7:27:2     Nanomechanical properties of AlN(103) thin films by nanoindentation
DOI:10.1016/j.jallcom.2009.11.166  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:13  AU: Jian, Sheng-Rui;Chen, Guo-Ju;Jang, Jason S-C.;Lai, Yi-Shao;
7:7:27:3     Shock deformation of coarse grain alumina above Hugoniot elastic limit
DOI:10.1007/s10853-010-4409-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:15  AU: Mukhopadhyay, Anoop K.;Joshi, Keshaw D.;Dey, Arjun;Chakraborty, Riya;Rav, Amit;Biswas, Sampad K.;Gupta, Satish C.;
7:7:27:4     Microstructural characterization of alumina-zirconia layered ceramics using positron annihilation spectroscopy
DOI:10.1016/j.actamat.2010.01.033  JN:ACTA MATERIALIA  PY:2010
  TC:3  AU: Parente, P.;Ortega, Y.;Savoini, B.;Monge, M. A.;Tucci, A.;Esposito, L.;Sanchez-Herencia, A. J.;
7:7:27:5     Characterization of residual compressive stresses in layered ceramics by positron annihilation spectroscopy
DOI:10.1016/j.jeurceramsoc.2012.06.006  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Parente, Paola;Ortega, Yanicet;Savoini, Begona;Monge, Miguel A.;Tucci, Antonella;Esposito, Leonardo;Ferrari, Begona;Javier Sanchez-Herencia, A.;
7:7:27:6     Evaluation of microwave processed glass-ceramic coating on nimonic superalloy substrate
DOI:10.1016/j.ceramint.2009.12.003  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:6  AU: Das, S.;Mukhopadhyay, A. K.;Datta, S.;Basu, D.;
7:7:27:7     Cordierite based glass-ceramic glazed floor tiles by microwave processing
DOI:10.1016/j.matchar.2014.05.023  JN:MATERIALS CHARACTERIZATION  PY:2014
  TC:0  AU: Ghosh, Sumana;Pal, Kalyan Sundar;Mandal, Ashis Kumar;Biswas, Nilormi;Bhattacharya, Manjima;Bandyopadhyay, Payel;
7:7:27:8     Electron microscopy of shock deformation in alumina
DOI:10.1016/j.ceramint.2011.03.034  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:9  AU: Mukhopadhyay, Anoop K.;Joshi, Keshaw D.;Dey, Arjun;Chakraborty, Riya;Mandal, Ashok K.;Rav, Amit;Ghosh, Jiten;Bysakh, Sandip;Biswas, Sampad K.;Gupta, Satish C.;
7:7:28:1     Spectroscopic ellipsometric modeling of a Bi-Te-Se write layer of an optical data storage device as guided by atomic force microscopy, scanning electron microscopy, and X-ray diffraction
DOI:10.1016/j.tsf.2014.08.026  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Wang, Hao;Madaan, Nitesh;Bagley, Jacob;Diwan, Anubhav;Liu, Yiqun;Davis, Robert C.;Lunt, Barry M.;Smith, Stacey J.;Linford, Matthew R.;
7:7:28:2     Carbon-Coated Tellurium for Optical Data Storage
DOI:10.1021/am100383j  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2010
  TC:6  AU: Abbott, Jonathan;Niederhauser, Travis L.;Hansen, Douglas P.;Perkins, Raymond T.;Bell, David A.;Bard, Erik C.;Lunt, Barry M.;Worthington, Mark O.;Miller, C. Michael;Hyatt, Daniel F.;Asplund, Matthew C.;Jiang, Guilin;Linford, Matthew R.;Vanfleet, Richard R.;Davis, Robert C.;
7:7:28:3     Oxidation of graphene 'bow tie' nanofuses for permanent, write-once-read-many data storage devices
DOI:10.1088/0957-4484/24/13/135202  JN:NANOTECHNOLOGY  PY:2013
  TC:2  AU: Pearson, A. C.;Jamieson, S.;Linford, M. R.;Lunt, B. M.;Davis, R. C.;
7:7:28:4     Ultra-precision raster milling-induced phase decomposition and plastic deformation at the surface of a Zn-Al-based alloy
DOI:10.1016/j.scriptamat.2009.09.021  JN:SCRIPTA MATERIALIA  PY:2010
  TC:7  AU: Zhu, Y. H.;To, S.;Lee, W. B.;Zhang, S. J.;Cheung, C. F.;
7:7:28:5     Carbon/Ternary Alloy/Carbon Optical Stack on Mylar as an Optical Data Storage Medium to Potentially Replace Magnetic Tape
DOI:10.1021/am401693u  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2013
  TC:2  AU: Wang, Hao;Lunt, Barry M.;Gates, Richard J.;Asplund, Matthew C.;Shutthanandan, V.;Davis, Robert C.;Linford, Matthew R.;
7:7:28:6     Electropulsing-induced microstructure evolution and its effect on electrical conductivity of (Bi0.25Sb0.75)(2)Te-3 thin films
DOI:10.1016/j.scriptamat.2013.03.032  JN:SCRIPTA MATERIALIA  PY:2013
  TC:3  AU: Zhu, Y. H.;Jiang, J.;Xiao, Y. K.;Luk, C. M.;Lai, W. E.;
7:7:28:7     Real time spectroscopic ellipsometry of Ag/ZnO and Al/ZnO interfaces for back-reflectors in thin film Si:H photovoltaics
DOI:10.1016/j.tsf.2010.11.093  JN:THIN SOLID FILMS  PY:2011
  TC:10  AU: Dahal, Lila Raj;Sainju, Deepak;Podraza, N. J.;Marsillac, S.;Collins, R. W.;
7:7:28:8     Approach for extracting complex dielectric function spectra in weakly-absorbing regions
DOI:10.1016/j.tsf.2014.03.020  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Gautam, L. Karki;Haneef, H.;Junda, M. M.;Saint John, D. B.;Podraza, N. J.;
7:7:28:9     Static electropulsing-induced phase transformations of a cold-deformed ZA27 alloy
DOI:10.1557/jmr.2011.185  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:0  AU: Zhu, Yaohua;To, Suet;Liu, Xianming;Hu, Guoliang;Xu, Qing;
7:7:29:1     High Performance Poly-Si Thin Film Transistors Fabricated by Self-Aligned Seed Induced Lateral Crystallization
DOI:10.1007/s13391-011-0410-6  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:7  AU: Byun, Chang Woo;Son, Se Wan;Lee, Yong Woo;Yun, Seung Jae;Lee, Sang Joo;Joo, Seung Ki;
7:7:29:2     Using Phosphorus-Doped alpha-Si Gettering Layers to Improve NILC Poly-Si TFT Performance
DOI:10.1007/s11664-009-1027-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2010
  TC:7  AU: Wang, Bau-Ming;Wu, YewChung Sermon;
7:7:29:3     Effect of Ni silicide density on electrical performance of silicide-induced crystallized polycrystalline silicon thin-film transistors
DOI:10.1007/s13391-012-2112-0  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:6  AU: Byun, Chang Woo;Reddy, A. Mallikarjuna;Son, Se Wan;Joo, Seung Ki;
7:7:29:4     High Performance Low Temperature Polycrystalline Si Thin-Film Transistors Fabricated by Silicide Seed-Induced Lateral Crystallization
DOI:10.1007/s13391-012-2079-x  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:7  AU: Byun, Chang Woo;Son, Se Wan;Lee, Yong Woo;Joo, Seung Ki;
7:7:29:5     Fabrication of a High-Performance Poly-Si Thin-Film Transistor Using a Poly-Si Film Prepared by Silicide-Enhanced Rapid Thermal Annealing Process
DOI:10.1007/s13391-014-4095-5  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:0  AU: Yang, Yong Ho;Ahn, Kyung Min;Kang, Seung Mo;Moon, Sun Hong;Ahn, Byung Tae;
7:7:29:6     Novel Crosslinked PVA Without Photoinitiator for Organic Passivation Layers of Pentacene Thin-Film Transistors
DOI:10.1080/15421406.2014.936806  JN:MOLECULAR CRYSTALS AND LIQUID CRYSTALS  PY:2014
  TC:1  AU: Yang, Hoon Joo;Yi, Mi Hye;Ahn, Taek;
7:7:29:7     Doping Effect on the Metal-induced Lateral Crystallization Rate
DOI:10.1007/s13391-012-2052-8  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:2  AU: Yang, Gui Fu;Lee, Yong Woo;Byun, Chang Woo;Son, Se Wan;Joo, Seung Ki;
7:7:29:8     Doping Effect on the Metal-induced Lateral Crystallization Rate (vol 8, pg 117, 2012)
DOI:10.1007/s13391-012-1052-z  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:0  AU: Yang, Gui Fu;Lee, Yong Woo;Byun, Chang Woo;Son, Se Wan;Joo, Seung Ki;
7:7:30:1     Dielectric, AC-impedance, modulus studies on 0.5BaTiO(3) center dot 0.5CaCu(3)Ti(4)O(12) nano-composite ceramic synthesized by one-pot, glycine-assisted nitrate-gel route
DOI:10.1016/j.ceramint.2014.04.001  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Singh, Laxman;Rai, Uma Shanker;Mandal, Kamdeo;Sin, Byung Cheol;Lee, Sang-Ick;Lee, Youngil;
7:7:30:2     Temperature-dependent ac conductivity and dielectric response of vanadium doped CaCu3Ti4O12 ceramic
DOI:10.1007/s00339-011-6382-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:7  AU: Sen, A.;Maiti, U. N.;Thapa, R.;Chattopadhyay, K. K.;
7:7:30:3     Dielectric properties of zinc doped nanocrystalline calcium copper titanate synthesized by different approach
DOI:10.1016/j.materresbull.2013.02.005  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:7  AU: Singh, Laxman;Rai, U. S.;Mandal, K. D.;
7:7:30:4     Dielectric properties of CaCu3Ti4-xCoxO12 (x=0.10, 0.20, and 0.30) synthesized by semi-wet route
DOI:10.1016/j.matchemphys.2010.02.037  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:8  AU: Rai, Alok Kumar;Mandal, K. D.;Kumar, D.;Parkash, Om;
7:7:30:5     Sintering Effects on Dielectric Properties of Zn-Doped CaCu3Ti4O12 Ceramic Synthesized by Modified Sol-Gel Route
DOI:10.1007/s13391-012-2095-x  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:3  AU: Singh, Laxman;Rai, U. S.;Rai, Alok Kumar;Mandal, K. D.;
7:7:31:1     Thin film colossal dielectric constant oxide La2-xSrxNiO4: Synthesis, dielectric relaxation measurements, and electrode effects
DOI:10.1063/1.3528161  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Podpirka, Adrian;Ramanathan, Shriram;
7:7:31:2     Schottky barrier height and conduction mechanisms in ferroelectric bismuth titanate
DOI:10.1063/1.3298645  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Liu, Fen;Ma, Ying;Yang, Feng;Zhou, Yichun;
7:7:31:3     Heteroepitaxy and crystallographic orientation transition in La1.875Sr0.125NiO4 thin films on single crystal SrTiO3
DOI:10.1557/jmr.2013.121  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:0  AU: Podpirka, Adrian;Balakrishnan, Viswanath;Ramanathan, Shriram;
7:7:31:4     Leakage behaviors of ferroelectric (Bi3.15Nd0.85)Ti3O12 thin film derived from RF sputtering
DOI:10.1007/s00339-011-6531-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:1  AU: Gao, X. S.;Wang, J.;
7:7:31:5     Thickness-dependent orientation evolution in nickel thin films grown on yttria-stabilized zirconia single crystals
DOI:10.1080/14786435.2011.608086  JN:PHILOSOPHICAL MAGAZINE  PY:2011
  TC:2  AU: Viswanath, B.;Ko, Changhyun;Ramanathan, Shriram;
7:7:32:1     Colossal dielectric constant of poly- and single-crystalline CaCu3Ti4O12 fibres grown by the laser floating zone technique
DOI:10.1016/j.actamat.2010.09.014  JN:ACTA MATERIALIA  PY:2011
  TC:10  AU: Amaral, F.;Costa, L. C.;Valente, M. A.;Fernandes, A. J. S.;Franco, N.;Alves, E.;Costa, F. M.;
7:7:32:2     Effect of Processing Parameters on Ferroelectric Properties of 0.5(Ba,Ca)TiO3-0.5Ba(Zr,Ti)O-3:Bulk, Thin Films and Fibers
DOI:10.1080/00150193.2014.894857  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Venkata Ramana, E.;Ferreira, N. M.;Graca, M. P. F.;Valente, M. A.;
7:7:32:3     Reassessment of the impedance spectra and dielectric responses of undoped and CaSiO3-doped CaCu3Ti4O12
DOI:10.1063/1.3527926  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Fang, Tsang-Tse;Chung, Han-Yang;
7:7:32:4     Effects of Mn doping on the electrical and dielectric properties of CaCu3Ti4O12 fibres
DOI:10.1016/j.ceramint.2014.08.002  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Amaral, F.;Clemente, E.;Valente, M. A.;Costa, L. C.;Costa, F. M.;
7:7:32:5     Role of strained nano-regions in the formation of subgrains in CaCu3Ti4O12
DOI:10.1063/1.3610520  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Fang, Tsang-Tse;Wang, Yong-Huei;Kuo, Jui-Chao;
7:7:32:6     Enhancement of superconductivity in LFZ-grown BSCCO fibres by steeper axial temperature gradients
DOI:10.1016/j.apsusc.2011.11.054  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:6  AU: Vieira, J. M.;Silva, R. A.;Silva, R. F.;Costa, F. M.;
7:7:32:7     Effect of Pb doping on the electrical properties of textured Bi-2212 superconductors
DOI:10.1016/j.jeurceramsoc.2014.04.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Sotelo, A.;Rasekh, Sh.;Constantinescu, G.;Amaveda, H.;Torres, M. A.;Madre, M. A.;Diez, J. C.;
7:7:33:1     Nanocrystals of a new complex perovskite dielectric Ba2TmSbO6
DOI:10.1016/j.jallcom.2011.09.064  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Nair, V. M.;Jose, R.;Kumar, G. M. Anil;Yusoff, Mashitah M.;Wariar, P. R. S.;
7:7:33:2     Magnetic properties of Ba2HoSbO6 with a frustrated lattice geometry
DOI:10.1103/PhysRevB.81.064425  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Calder, S.;Ke, X.;Bert, F.;Amato, A.;Baines, C.;Carboni, C.;Cava, R. J.;Daoud-Aladine, A.;Deen, P.;Fennell, T.;Hillier, A. D.;Karunadasa, H.;Taylor, J. W.;Mendels, P.;Schiffer, P.;Bramwell, S. T.;
7:7:33:3     Structural, vibrational and electrical properties of ordered double perovskite oxide BaLaMnSbO6
DOI:10.1016/j.jallcom.2013.12.124  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Bharti, Chandrahas;Sen, A.;Chanda, Sadhan;Sinha, T. P.;
7:7:33:4     Effect of indium doping on structural, magnetic and transport properties of ordered Sr2FeMoO6 double perovskite
DOI:10.1016/j.jallcom.2011.02.034  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Markandeya, Y.;Saritha, D.;Vithal, M.;Singh, A. K.;Bhikshamaiah, G.;
7:7:33:5     FT-Raman and FT-IR vibrational spectroscopic studies of Sr2RESbO6 (RE = La to Lu and Y) double perovskites
DOI:10.1016/j.jallcom.2012.05.095  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Fernandez-Martinez, F.;Montero, J. L.;Carrillo, I.;Colon, C.;
7:7:33:6     Strong correlation between structural, magnetic and transport properties of non-stoichiometric Sr2FexMo2-xO6 ( 0.8 <= x <= 1.5) double perovskites
DOI:10.1016/j.jallcom.2011.06.108  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Markandeya, Y.;Suresh, K.;Bhikshamaiah, G.;
7:7:33:7     First-principles study of structural, vibrational and dielectric properties of double perovskites Ba(2)LnSbO(6) (Ln = Sm, Gd, Dy and Y)
DOI:10.1016/j.jallcom.2012.08.106  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Karandeep;Gupta, H. C.;Kumar, S.;
7:7:34:1     Synthesis, characterization of double perovskite Ca2MSbO6 (M = Dy, Fe, Cr, Al) materials via sol-gel auto-combustion and their catalytic properties
DOI:10.1016/j.matchar.2013.07.005  JN:MATERIALS CHARACTERIZATION  PY:2013
  TC:0  AU: Feraru, S.;Samoila, P.;Borhan, A. I.;Ignat, M.;Iordan, A. R.;Palamaru, M. N.;
7:7:34:2     Electronic, crystal structure and morphological properties of the Sr2DyRuO6 double perovskite
DOI:10.1016/j.matlet.2012.05.041  JN:MATERIALS LETTERS  PY:2012
  TC:8  AU: Triana, C. A.;Landinez Tellez, D. A.;Arbey Rodriguez, J.;Fajardo, F.;Roa-Rojas, J.;
7:7:34:3     Crystal and magnetic study of the disordered perovskites Ca(Mn0.5Sb0.5)O-3 and Ca(Fe0.5Sb0.5)O-3
DOI:10.1016/j.materresbull.2010.06.036  JN:MATERIALS RESEARCH BULLETIN  PY:2010
  TC:7  AU: Retuerto, M.;Martinez-Lope, M. J.;Garcia-Hernandez, M.;Munoz, A.;Fernandez-Diaz, M. T.;Alonso, J. A.;
7:7:34:4     High temperature-induced phase transitions in Sr2GdRuO6 complex perovskite
DOI:10.1016/j.materresbull.2011.08.024  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:7  AU: Triana, C. A.;Corredor, L. T.;Landinez Tellez, D. A.;Roa-Rojas, J.;
7:7:34:5     Synthesis, structural and electrical properties of double perovskite Sr2NiMoO6 ceramics
DOI:10.1007/s00339-011-6744-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Prasatkhetragarn, A.;Kaowphong, S.;Yimnirun, R.;
7:7:34:6     Hydrothermal synthesis and Sb-121 Mossbauer characterization of perovskite-type oxides: Ba(2)SbLnO(6) (Ln=Pr, Nd, Sm, Eu)
DOI:10.1016/j.matchar.2010.02.012  JN:MATERIALS CHARACTERIZATION  PY:2010
  TC:4  AU: Wu, Liyan;Ma, Jianmin;Huang, Hongbo;Tian, Ruifang;Zheng, Wenjun;Hsia, Yuanfu;
7:7:34:7     Synthesis process and structural characterization of the Sr2EuRuO6 complex perovskite
DOI:10.1016/j.jallcom.2011.12.033  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Triana, C. A.;Landinez Tellez, D. A.;Roa-Rojas, J.;
7:7:34:8     Rotational and translational distortions of the crystal structure of the Sr(2)HrRuO(6) (Hr = Ho, Dy, Gd, Eu) complex perovskites
DOI:10.1016/j.matchemphys.2013.02.061  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:3  AU: Triana, C. A.;Landinez Tellez, D. A.;Roa-Rojas, J.;
7:7:35:1:1     Effect of Pad Surface Roughness on Material Removal Rate in Chemical Mechanical Polishing Using Ultrafine Colloidal Ceria Slurry
DOI:10.1007/s13391-012-2144-5  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:3  AU: Han, Sol;Kim, Hong Jin;Hong, Myung Ki;Kwon, Byoung Ho;Lee, Kuntack;Ko, Youngsun;
7:7:35:1:2     Correlation between Process Parameters and Electrochemical Surface State for Electrochemical-mechanical Polishing Application of Copper in Acid- and Alkali-based Electrolyte
DOI:10.1007/03391-011-1000-3  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:2  AU: Lee, Youngkyun;Seo, Yong-Jin;Yang, Jun-Won;Kim, Hyung-Ho;Park, Yeongbong;Jeong, Haedo;
7:7:35:1:3     Effect of heat according to wafer size on the removal rate and profile in CMP process
DOI:10.1007/s13391-013-6003-9  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:1  AU: Park, Yeongbong;Lee, Youngkyun;Lee, Hyunseop;Jeong, Haedo;
7:7:35:1:4     Evaluation of Oxide-Chemical Mechanical Polishing Characteristics Using Ceria-Mixed Abrasive Slurry
DOI:10.1007/s13391-012-2056-4  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:4  AU: Lee, Youngkyun;Seo, Yong-Jin;Jeong, Haedo;
7:7:35:2:1     First observation on the feasibility of scratch formation by pad-particle mixture in CMP process
DOI:10.1016/j.apsusc.2012.05.044  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:4  AU: Sung, In-Ha;Kim, Hong Jin;Yeo, Chang Dong;
7:7:35:2:2     Investigation on Surface Hardening of Polyurethane Pads During Chemical Mechanical Polishing (CMP)
DOI:10.1007/s11664-009-1064-0  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2010
  TC:6  AU: Yang, Ji Chul;Oh, Dong Won;Kim, Ho Joong;Kim, Taesung;
7:7:35:2:3     Experimental Evaluation of the Effect of Pad Debris Size on Microscratches during CMP Process
DOI:10.1007/s11664-012-2334-9  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:0  AU: Yang, Ji Chul;Kim, Hojoong;Oh, Dong Won;Won, Jai-Hyung;Lee, Chil-Gee;Kim, Taesung;
7:7:36:1     Red shift and higher photoluminescence emission of CCTO thin films undergoing pressure treatment
DOI:10.1016/j.jallcom.2013.08.210  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Sequinel, T.;Garcia, I. G.;Tebcherani, S. M.;Kubaski, E. T.;Oliveira, L. H.;Siu Li, M.;Longo, E.;Varela, J. A.;
7:7:36:2     Nanomechanical properties of glass-ceramic films obtained by pressure impregnation of oxide powders on commercial float glass surfaces
DOI:10.1016/j.jnoncrysol.2009.11.006  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2010
  TC:4  AU: Cava, S.;Sequinel, T.;Tebcherani, S. M.;Michel, M. D.;Lepienski, C. M.;Varela, J. A.;
7:7:36:3     Intense photoluminescence emission at room temperature in calcium copper titanate powders
DOI:10.1016/j.ceramint.2012.11.034  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:4  AU: Moura, F.;Simoes, A. Z.;Deus, R. C.;Silva, M. R.;Varela, J. A.;Longo, E.;
7:7:36:4     IR reflectance characterization of glass-ceramic films obtained by high pressure impregnation of SnO2 nanopowders on float glass
DOI:10.1016/j.ceramint.2011.01.013  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:2  AU: Sequinel, T.;Cava, S.;Pimenta, J. O.;Pianaro, S. A.;Tebcherani, S. M.;Varela, J. A.;
7:7:36:5     Effect of temperature on glass-ceramic films prepared by impregnation of commercial float glass surfaces with oxide powders under pressure
DOI:10.1016/j.tsf.2010.05.087  JN:THIN SOLID FILMS  PY:2010
  TC:2  AU: Cava, S.;Sequinel, T.;Tebcherani, S. M.;Lazaro, S. R.;Pianaro, S. A.;Varela, J. A.;
7:7:37:1     Non-symmetric superparamagnetic clusters in the relaxor manganites Sr2-xBixMnTiO6 (0 <= x <= 0.75)
DOI:10.1039/c2jm30670k  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:2  AU: Alvarez-Serrano, Inmaculada;Luisa Lopez, M.;Rubio, Fausto;Garcia-Hernandez, Mar;Cuello, Gabriel J.;Pico, Carlos;Luisa Veiga, M.;
7:7:37:2     Room temperature electroresistance in Sr2-xGdxMnTiO6 perovskites (0 <= x <= 1)
DOI:10.1016/j.jallcom.2011.01.130  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:5  AU: Biskup, N.;Garcia-Hernandez, M.;Alvarez-Serrano, I.;Lopez, M. L.;Veiga, M. L.;
7:7:37:3     Structural Characterization and Evolution of the Electronic Behavior of New Sr2-xGdxMnTiO6 (0 <= x <= 1) Perovskites
DOI:10.1111/j.1551-2916.2010.04054.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Alvarez-Serrano, Inmaculada;Luisa Lopez, M.;Angeles Arillo, M.;Garcia-Hernandez, Mar;Rodriguez-Castellon, Enrique;Jimenez-Lopez, A.;Luisa Veiga, M.;Pico, Carlos;
7:7:37:4     Magnetization and neutron diffraction studies on Sr2TiMnO6
DOI:10.1063/1.3562917  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Lamsal, Jagat;Mondal, Rajib;Kumar, Anil;Bharathi, K. Kamala;Santhosh, P. N.;Nirmala, R.;Nigam, A. K.;Yelon, W. B.;Quezado, S.;Malik, S. K.;
7:7:38:1     Atomic scale study of thermal reduction of nano goethite coexisting with magnetite
DOI:10.1063/1.4790614  JN:AIP ADVANCES  PY:2013
  TC:3  AU: Singh, L. Herojit;Govindaraj, R.;Mythili, R.;Amarendra, G.;Sundar, C. S.;
7:7:38:2     Size-dependent magnetic ordering and spin dynamics in DyPO4 and GdPO4 nanoparticles
DOI:10.1103/PhysRevB.84.094408  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Evangelisti, Marco;Sorop, Tibi G.;Bakharev, Oleg N.;Visser, Dirk;Hillier, Adrian D.;Alonso, Juan J.;Haase, Markus;Boatner, Lynn A.;de Jongh, L. Jos;
7:7:38:3     Thermoinduced magnetic moment in akaganeite nanoparticles
DOI:10.1103/PhysRevB.83.214426  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Urtizberea, A.;Luis, F.;Millan, A.;Natividad, E.;Palacio, F.;Kampert, E.;Zeitler, U.;
7:7:38:4     Local structure and magnetic properties of cubic iron oxide nanoparticles formed in zeolite as deduced using Mossbauer spectroscopy
DOI:10.1063/1.4828498  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Singh, L. Herojit;Govindaraj, R.;Amarendra, G.;Sundar, C. S.;
7:7:38:5     A muon spin relaxation study of the metal-organic magnet Ni(TCNQ)(2)
DOI:10.1063/1.4798616  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Berlie, Adam;Terry, Ian;Giblin, Sean;Lancaster, Tom;Szablewski, Marek;
7:7:38:6     Magnetically induced structural reorientation in magnetite studied by nuclear magnetic resonance
DOI:10.1063/1.3501108  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:7  AU: Chlan, V.;Kouril, K.;Stepankova, H.;Reznicek, R.;Stepanek, J.;Tabis, W.;Krol, G.;Tarnawski, Z.;Kakol, Z.;Kozlowski, A.;
7:7:39:1     Selective substitution and tetragonality by Co-doping of dysprosium and thulium on dielectric properties of barium titanate ceramics
DOI:10.1007/s13391-011-0612-y  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:8  AU: Kim, Jungdae;Kim, Dowan;Kim, Jinseong;Kim, Yong-nam;Hui, K. N.;Lee, Heesoo;
7:7:39:2     Phase and electrical properties of PZT thin films embedded with CuO nano-particles by a hybrid sol-gel route
DOI:10.1007/s13391-013-0009-1  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:4  AU: Sreesattabud, Tharathip;Gibbons, Brady J.;Watcharapasorn, Anucha;Jiansirisomboon, Sukanda;
7:7:39:3     Properties of BaTiO3 Films Sputter Deposited on PET for Pulse Power Capacitors
DOI:10.1080/00150193.2013.848761  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Park, Sang Shik;
7:7:39:4     High Resolution 3-D Imaging for characteristics of (111)-Oriented Pb(Zr0.35Ti0.65)O-3 Thin Film by Using Time-of-Flight Secondary Ion Mass Spectrometry and Piezoresponse Force Microscopy
DOI:10.1007/s13391-011-0916-y  JN:ELECTRONIC MATERIALS LETTERS  PY:2011
  TC:5  AU: Shin, Hyun-Chang;Song, Joon-Tae;
7:7:40:1     Bipolar carrier transport in tris(8-hydroxy-quinolinato) aluminum observed by impedance spectroscopy measurements
DOI:10.1063/1.3615950  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:15  AU: Ishihara, Shingo;Hase, Hiroyuki;Okachi, Takayuki;Naito, Hiroyoshi;
7:7:40:2     High-efficiency green phosphorescent organic light-emitting diodes with double-emission layer and thick N-doped electron transport layer
DOI:10.1016/j.tsf.2013.05.012  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Nobuki, Shunichiro;Wakana, Hironori;Ishihara, Shingo;Mikami, Akiyoshi;
7:7:40:3     Determination of electron mobility in tris(8-hydroxy-quinolinato) aluminum by admittance spectroscopy
DOI:10.1063/1.4821280  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Wang, Yanping;Chen, Jiangshan;Dong, Lisong;Ma, Dongge;
7:7:40:4     Characterization of defects in Mg doped GaN epitaxial layers using conductance measurements
DOI:10.1016/j.tsf.2011.11.020  JN:THIN SOLID FILMS  PY:2012
  TC:6  AU: Elsherif, O. S.;Vernon-Parry, K. D.;Dharmadasa, I. M.;Evans-Freeman, J. H.;Airey, R. J.;Kappers, M. J.;Humphreys, C. J.;
7:7:40:5     Demonstration of determination of electron and hole drift-mobilities in organic thin films by means of impedance spectroscopy measurements
DOI:10.1016/j.tsf.2013.08.022  JN:THIN SOLID FILMS  PY:2014
  TC:6  AU: Ishihara, Shingo;Hase, Hiroyuki;Okachi, Takayuki;Naito, Hiroyoshi;
7:7:40:6     Impedance spectroscopy for high resolution measurements of energetic distributions of localized states in organic semiconductors
DOI:10.1016/j.tsf.2013.05.159  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Hase, Hiroyuki;Okachi, Takayuki;Ishihara, Shingo;Nagase, Takashi;Kobayashi, Takashi;Naito, Hiroyoshi;
7:7:41:1     Effect of annealing conditions on the magnetism of Ni-doped La0.4Sr0.6TiO3-delta powders
DOI:10.1016/j.jmmm.2009.08.031  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:6  AU: Liu, K. L.;Yuan, S. L.;Tian, Z. M.;He, J. H.;Li, P.;Yin, S. Y.;Zheng, X. F.;Wang, C. H.;Duan, H. N.;Huo, S. X.;
7:7:41:2     Synthesis, magnetization, and photocatalytic activity of LaFeO3 and LaFe0.9Mn0.1O3-delta
DOI:10.1007/s10853-012-6845-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:4  AU: Wei, Zhi-Xian;Wang, Yan;Liu, Ji-Ping;Xiao, Cai-Mei;Zeng, Wei-Wei;Ye, Shao-Bo;
7:7:41:3     Preparation of SrTi0.1Fe0.9O3-delta and its photocatalysis activity for degradation of methyl orange in water
DOI:10.1016/j.matchemphys.2011.09.038  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:5  AU: Chen, Hong-Xia;Wei, Zhi-Xian;Wang, Yan;Zeng, Wei-Wei;Xiao, Cai-Mei;
7:7:41:4     Synthesis, magnetization and photocatalytic activity of LaFeO3 and LaFe0.5Mn0.5-xO3-delta
DOI:10.1016/j.matchemphys.2012.07.052  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:9  AU: Wei, Zhi-Xian;Wang, Yan;Liu, Ji-Ping;Xiao, Cai-Mei;Zeng, Wei-Wei;
7:7:42:1     Dielectric relaxation behaviors of pure and Pr6O11-doped CaCu3Ti4O12 ceramics in high temperature range
DOI:10.1016/j.jallcom.2011.02.105  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:8  AU: Xu, L. F.;Qi, P. B.;Song, X. P.;Luo, X. J.;Yang, C. P.;
7:7:42:2     Effects of praseodymium substitution on electrical properties of CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2013.05.121  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Rai, Alok Kumar;Gim, Jihyeon;Shin, Eui-chol;Seo, Hyun-Ho;Mathew, Vinod;Mandal, K. D.;Parkash, Om;Lee, Jong-Sook;Kim, Jaekook;
7:7:42:3     Positive temperature coefficient resistor behavior in praseodymium-doped ZnO (000(1)over-bar) vertical bar (000(1)over-bar) boundaries
DOI:10.1063/1.3432444  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Lee, Jong-Sook;Kim, Yong;Shin, Eui-Chol;Maier, Joachim;
7:7:42:4     Positive temperature coefficient resistor behavior in praseodymium-doped ZnO (000(1)over-bar)vertical bar(000(1)over-bar) boundaries (vol 96, 202104, 2010)
DOI:10.1063/1.3453760  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:0  AU: Lee, Jong-Sook;Kim, Yong;Shin, Eui-Chol;Maier, Joachim;
7:7:42:5     Structural, dielectric properties and electrical conduction behaviour of Dy substituted CaCu3Ti4O12 ceramics
DOI:10.1016/j.ceramint.2012.05.078  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Kashyap, Raman;Mishra, R. K.;Thakur, O. P.;Tandon, R. P.;
7:7:43:1     Electrical conductivity anomaly and X-ray photoelectron spectroscopy investigation of YCr1-xMnxO3 negative temperature coefficient ceramics
DOI:10.1063/1.4868435  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Zhang, Bo;Zhao, Qing;Chang, Aimin;Li, Yiyu;Liu, Yin;Wu, Yiquan;
7:7:43:2     Hydroxide precursors to produce nanometric YCrO3: Characterization and conductivity analysis
DOI:10.1016/j.materresbull.2012.02.043  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:5  AU: Duran, A.;Meza F, C.;Carbajal Arizaga, Gregorio Guadalupe;
7:7:43:3     Biferroic LuCrO3: Structural characterization, magnetic and dielectric properties
DOI:10.1016/j.matchemphys.2013.11.026  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Duran, A.;Meza F, C.;Moran, E.;Alario-Franco, M. A.;Ostos, C.;
7:7:43:4     Moisture sensitivity of YCr(1-x)MnxO3 perovskites
DOI:10.1016/j.ceramint.2009.10.021  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:5  AU: Nivot, Christelle;Bernard, Jerome;Lelievre, C.;Haussonne, Jean-Marie;Houivet, David;
7:7:44:1     Planarized thick copper gate polycrystalline silicon thin film transistors for ultra-large AMOLED displays
DOI:10.1007/s13391-012-2122-y  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:8  AU: Yun, Seung Jae;Lee, Yong Woo;Son, Se Wan;Byun, Chang Woo;Reddy, A. Mallikarjuna;Joo, Seung Ki;
7:7:44:2     Threshold Voltage Model of Fast-Moving Ball Actuator
DOI:10.1007/s13391-013-3227-7  JN:ELECTRONIC MATERIALS LETTERS  PY:2014
  TC:0  AU: Hong, MunPyo;Lee, Jongmo;Jhun, Chul Gyu;Yoon, Ho Won;Bae, Byung Seong;Han, Seungoh;
7:7:44:3     Red fluorescent DCM derivatives with the bulky adamantyl and bicyclo[2,2,2]octyl groups for organic light emitting diodes (OLEDs)
DOI:10.1007/s13391-013-6007-5  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:1  AU: Jang, Heung Soo;Lee, Kum Hee;Lee, Seok Jae;Kim, Young Kwan;Yoon, Seung Soo;
7:7:44:4     Soluble N-Type organic thin-film transistors with enhanced electrical characteristics
DOI:10.1007/s13391-013-6031-5  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:4  AU: Lee, Ho Won;Lee, Seok Jae;Koo, Ja Ryong;Cho, Eou Sik;Kwon, Sang Jik;Kim, Woo Young;Park, Jaehoon;Kim, Young Kwan;
7:7:44:5     Investigation of the instability of low-temperature poly-silicon thin film transistors under a negative bias temperature stress
DOI:10.1007/s13391-013-3173-4  JN:ELECTRONIC MATERIALS LETTERS  PY:2013
  TC:0  AU: Kim, Yu-Mi;Jeong, Kwang-Seok;Yun, Ho-Jin;Yang, Seung-Dong;Lee, Sang-Youl;Lee, Hi-Deok;Lee, Ga-Won;
7:7:45:1     Soft-mode behavior and incipient ferroelectricity in Na1/2Bi1/2Cu3Ti4O12
DOI:10.1103/PhysRevB.81.224112  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Ferrarelli, Matthew C.;Nuzhnyy, Dmitry;Sinclair, Derek C.;Kamba, Stanislav;
7:7:45:2     Influence of oxygen vacancy on the electronic structure of CaCu3Ti4O12 and its deep-level vacancy trap states by first-principle calculation
DOI:10.1063/1.3697899  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Xiao, H. B.;Yang, C. P.;Huang, C.;Xu, L. F.;Shi, D. W.;Marchenkov, V. V.;Medvedeva, I. V.;Baerner, K.;
7:7:45:3     Intrinsic and extrinsic dielectric responses of CaCu3Ti4O12 thin films
DOI:10.1063/1.3644962  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Rubinger, C. P. L.;Moreira, R. L.;Ribeiro, G. M.;Matinaga, F. M.;Laurent, S. Autier;Mercey, B.;Lobo, R. P. S. M.;
7:7:46:1     Intergrain connectivity of MgB2 ceramics studied by impedance analysis
DOI:10.1063/1.3462398  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Wang, C. C.;Wang, C.;Zeng, R.;Dou, S. X.;
7:7:46:2     Defect structure of ultrafine MgB2 nanoparticles
DOI:10.1063/1.4902375  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Bateni, Ali;Repp, Sergej;Thomann, Ralf;Acar, Selcuk;Erdem, Emre;Somer, Mehmet;
7:7:46:3     Influence of Mg deficiency on crystal structure and superconducting properties in MgB2 single crystals
DOI:10.1103/PhysRevB.81.054520  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Zhigadlo, N. D.;Katrych, S.;Karpinski, J.;Batlogg, B.;Bernardini, F.;Massidda, S.;Puzniak, R.;
7:7:46:4     Superconducting transition width under magnetic field in MgB2 polycrystalline samples
DOI:10.1063/1.3488631  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:0  AU: Wang, C. C.;Zeng, R.;Xu, X.;Dou, S. X.;
7:7:47:1     Effects of BaO-B2O3-SiO2 glass additive on dielectric properties of Ba(Co0.5Nb0.5)O-3 ceramics
DOI:10.1016/j.matlet.2014.05.181  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Wang, Zhuo;Li, Hai Juan;Zhang, Liang Liang;Wen, Yong Fei;Pu, Yong Ping;
7:7:47:2     Influence of Ba-Zn-B additives on the sintering behavior and dielectric properties of BaNd2Ti4O12 ceramics
DOI:10.1016/j.matlet.2011.11.003  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Long, Mingzhu;Tang, Bin;Zhang, Shuren;Yu, Shengquan;
7:7:48:1     Transformation from insulating p-type to semiconducting n-type conduction in CaCu3Ti4O12-related Na(Cu5/2Ti1/2)Ti4O12 ceramics
DOI:10.1063/1.4813875  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Li, Ming;Sinclair, Derek C.;
7:7:48:2     Influence of high levels of Nb and Ti doping on the dielectric properties of CaCu3Ti4O12 type of compounds
DOI:10.1016/j.matchemphys.2009.12.006  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:5  AU: Rivas-Murias, B.;Sanchez-Andujar, M.;Rivas, J.;Senaris-Rodriguez, M. A.;
7:7:49:1     Electrical properties of low temperature sintered copper and titanium-codoped copper zinc ferrites
DOI:10.1016/j.jallcom.2010.04.134  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Hsiang, Hsing-I.;Mei, Li-Then;Hsi, Chi-Shiung;Liu, Yi-Lang;Yen, Fu-Su;
7:7:49:2     Effects of a non-magnetic CuZn ferrite layer on cofiring and electrical properties of a low-fire, multilayer NiCuZn ferrite inductor
DOI:10.1016/j.ceramint.2013.03.012  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Tung, Yi-Ling;Jean, Jau-Ho;Cheng, Ya-Hwang;
7:7:50:1     IBLC effect leading to colossal dielectric constant in layered structured Eu2CuO4 ceramic
DOI:10.1016/j.ceramint.2013.08.123  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Salame, Paresh;Drai, Renangso;Prakash, Om;Kulkarni, A. R.;
7:7:50:2     Exceptionally High Dielectric Constant in Ceramic Pr2CuO4
DOI:10.1111/jace.12306  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Salame, Paresh H.;Prakash, Om;Kulkarni, A. R.;
7:8:1:1     Color-Tunable Up-Conversion Emission and Infrared Photoluminescence and Dielectric Relaxation of Er3+/Yb3+ Co-Doped Bi2Ti2O7 Pyrochlore Thin Films
DOI:10.1111/jace.12187  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Zhao, Jianxiong;Zhang, Qinyuan;Qin, Ni;Li, Baojun;Bao, Dinghua;
7:8:1:2     Raman study of phonon modes in bismuth pyrochlores
DOI:10.1103/PhysRevB.82.214302  JN:PHYSICAL REVIEW B  PY:2010
  TC:23  AU: Arenas, D. J.;Gasparov, L. V.;Qiu, Wei;Nino, J. C.;Patterson, Charles H.;Tanner, D. B.;
7:8:1:3     Structure and dielectric properties of sputtered bismuth magnesium niobate thin films
DOI:10.1016/j.tsf.2012.06.035  JN:THIN SOLID FILMS  PY:2012
  TC:18  AU: Gao, Libin;Jiang, Shuwen;Li, Ruguan;Li, Bin;Li, Yanrong;
7:8:1:4     Dielectric properties and electrical behaviors of tunable Bi1.5MgNb1.5O7 thin films
DOI:10.1016/j.ceramint.2011.12.069  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:14  AU: Li, Lingxia;Zhang, Xiaoyu;Ji, Lujie;Ning, Pingfan;Liao, Qingwei;
7:8:1:5     Effect of magnesium content on structure and dielectric properties of cubic bismuth magnesium niobate pyrochlores
DOI:10.1016/j.ceramint.2013.08.085  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Gao, Libin;Jiang, Shuwen;Li, Ruguan;Li, Bin;Li, Yanrong;
7:8:1:6     Bismuth Zinc Niobate Pyrochlore, a Relaxor-Like Non-Ferroelectric
DOI:10.1111/j.1551-2916.2011.04779.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Osman, Rozana A. M.;Maso, Nahum;West, Anthony R.;
7:8:1:7     Green Up-Conversion Photoluminescence and Dielectric Relaxation of Ho3+/Yb3+-Codoped Bi2Ti2O7 Pyrochlore Thin Films
DOI:10.1111/jace.12576  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:4  AU: Zhao, Jianxiong;Qin, Ni;Bao, Dinghua;
7:8:1:8     Dielectric properties and microstructural characterization of cubic pyrochlored bismuth magnesium niobates
DOI:10.1007/s00339-013-7843-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:4  AU: Zhang, Yuan;Zhang, Zhihao;Zhu, Xinhua;Liu, Zhiguo;Li, Yangyang;Al-Kassab, Talaat;
7:8:1:9     Electrical characterization and equivalent circuit analysis of (Bi(1.5)Zn(0.5))(Nb(0.5)Ti(1.5))O(7) Pyrochlore, a relaxor ceramic
DOI:10.1063/1.3553883  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Osman, Rozana A. M.;West, Anthony R.;
7:8:1:10     Influence of post deposition annealing on crystallinity and dielectric properties of bismuth magnesium niobate thin films
DOI:10.1016/j.apsusc.2013.07.127  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: Gao, Libin;Jiang, Shuwen;Li, Ruguan;Li, Bin;Li, Yanrong;
7:8:1:11     Structure and dielectric properties of rf sputtered Bi2O3-MgO-Nb2O5 pyrochlore thin films
DOI:10.1016/j.jallcom.2014.02.046  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Gao, Libin;Jiang, Shuwen;Li, Ruguan;Li, Yanrong;
7:8:1:12     Enhancement of upconversion luminescence of three-dimensional ordered macroporous Bi2Ti2O7:Er3+, Yb3+ by co-doping of Li+ ions
DOI:10.1016/j.matlet.2014.05.170  JN:MATERIALS LETTERS  PY:2014
  TC:5  AU: Cun, Yangke;Yang, Zhengwen;Liao, Jiayan;Qiu, Jianbei;Song, Zhiguo;Yang, Yong;
7:8:1:13     Properties and thermal stability of solution processed ultrathin, high-k bismuth titanate (Bi2Ti2O7) films
DOI:10.1016/j.materresbull.2012.01.001  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:5  AU: Hardy, A.;Van Elshocht, S.;De Dobbelaere, C.;Hadermann, J.;Pourtois, G.;De Gendt, S.;Afanas'ev, V. V.;Van Bael, M. K.;
7:8:1:14     Atomic-scale microstructures, Raman spectra and dielectric properties of cubic pyrochlore-typed Bi1.5MgNb1.5O7 dielectric ceramics
DOI:10.1016/j.ceramint.2014.01.007  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Li, Yangyang;Zhu, Xinhua;Kassab, T. A.;
7:8:1:15     Dielectric Properties of the Bismuth Neodymium Titanate Pyrochlore Solid Solution
DOI:10.1111/j.1551-2916.2012.05108.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Kunej, Spela;Skapin, Sreco D.;Suvorov, Danilo;
7:8:1:16     Atomic-scale microstructural characterization and dielectric properties of crystalline cubic pyrochlore Bi1.5MgNb1.5O7 nanoparticles synthesized by sol-gel method
DOI:10.1007/s11051-013-2208-y  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:0  AU: Zhang, Yuan;Zhu, Xinhua;Zhou, Shunhua;Zhu, Jianmin;Liu, Zhiguo;Al-Kassab, Talaat;
7:8:2:1     Influence of substrate temperature on structures and dielectric properties of pyrochlore Bi1.5Zn1.0Nb1.5O7 thin films prepared by pulsed laser deposition
DOI:10.1016/j.apsusc.2010.04.056  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:19  AU: Zhang, Xiaohua;Ren, Wei;Shi, Peng;Tian, Aifeng;Xin, Hong;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:8:2:2     Effect of oxygen pressure on structure and properties of Bi1.5Zn1.0Nb1.5O7 pyrochlore thin films prepared by pulsed laser deposition
DOI:10.1016/j.apsusc.2009.10.020  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:19  AU: Zhang, Xiaohua;Ren, Wei;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;
7:8:2:3     Structural, Optical, and Dielectric Properties of Bi1.5-xZn0.92-yNb1.5O6.92-delta Thin Films Grown by PLD on R-plane Sapphire and LaAlO3 Substrates
DOI:10.1021/am301152r  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:2  AU: Le Febvrier, A.;Galca, A. C.;Corredores, Y.;Deputier, S.;Bouquet, V.;Demange, V.;Castel, X.;Sauleau, R.;Lefort, R.;Zhang, L. Y.;Tanne, G.;Pintilie, L.;Guilloux-Viry, M.;
7:8:2:4     Substrate-target distance dependence of structural and optical properties in case of Pb(Zr,Ti)O-3 films obtained by pulsed laser deposition
DOI:10.1016/j.apsusc.2011.01.056  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:17  AU: Galca, A. C.;Stancu, V.;Husanu, M. A.;Dragoi, C.;Gheorghe, N. G.;Trupina, L.;Enculescu, M.;Vasile, E.;
7:8:2:5     Structures and dielectric properties of pyrochlore bismuth zinc niobate thin films with zinc compensation
DOI:10.1016/j.jallcom.2012.11.008  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:10  AU: Zhang, Xiaohua;Ren, Wei;Shi, Peng;Wu, Xiaoqing;Chen, Xiaofeng;Yao, Xi;
7:8:2:6     Structural and dielectric properties of Bi2Zn2/3Nb4/3O7 thin films prepared by pulsed laser deposition at low temperature for embedded capacitor applications
DOI:10.1016/j.jallcom.2011.06.120  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Zhang, Xiaohua;Ren, Wei;Shi, Peng;Khan, M. Saeed;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:8:2:7     Ferroelectric and dielectric multilayer heterostructures based on KTa0.65Nb0.35O3 and Bi1.5-xZn0.92-yNb1.5O6.92-1.5x-y grown by pulsed laser deposition and chemical solution deposition for high frequency tunable devices
DOI:10.1016/j.tsf.2011.10.142  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Le Febvrier, A.;Deputier, S.;Bouquet, V.;Demange, V.;Ollivier, S.;Galca, A. C.;Dragoi, C.;Radu, R.;Pintilie, L.;Guilloux-Viry, M.;
7:8:2:8     Structures and electric properties of cubic bismuth based pyrochlore thin films grown by pulsed laser deposition
DOI:10.1016/j.jallcom.2014.06.044  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Zhang, Xiaohua;Ren, Wei;Xin, Feng;Shi, Peng;
7:8:2:9     Structure, composition and microwave dielectric properties of bismuth zinc niobate pyrochlore thin films
DOI:10.1063/1.4902172  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Wang, Zhao;Ren, Wei;Zhan, Xuelei;Shi, Peng;Wu, Xiaoqing;
7:8:2:10     Structure and microwave dielectric properties of Bi1.5Zn1.0Nb1.5O7 thin films deposited on alumina substrates by pulsed laser deposition
DOI:10.1016/j.tsf.2012.04.023  JN:THIN SOLID FILMS  PY:2012
  TC:7  AU: Zhang, Xiaohua;Ren, Wei;Zhan, Xuelei;Wang, Zhao;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:8:2:11     Temperature-dependent dielectric relaxation in bismuth zinc niobate thin films
DOI:10.1063/1.3455897  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Booth, James C.;Orloff, Nathan D.;Cagnon, Joel;Lu, Jiwei;Stemmer, Susanne;
7:8:2:12     Preparation and electrical properties of Bi2Zn2/3Nb4/3O7 thin films deposited at room temperature for embedded capacitor applications
DOI:10.1016/j.ceramint.2011.04.053  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Zhang, Xiaohua;Ren, Wei;Shi, Peng;Khan, M. Saeed;Chen, Xiaofeng;Wu, Xiaoqing;Yao, Xi;
7:8:2:13     Influences of post-annealing on structural and electrical properties of Bi1.5Zn1.0Nb1.5O7 thin films prepared by pulsed laser deposition
DOI:10.1016/j.mseb.2012.04.019  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2012
  TC:2  AU: Zhang, Xiaohua;Ren, Wei;
7:8:2:14     Structural and electric properties of Bi2Zn2/3Nb4/3O7 thin films prepared by pulsed laser deposition
DOI:10.1007/s00339-013-7655-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Zhang, Xiaohua;Ren, Wei;Shi, Peng;Wu, Xiaoqing;Chen, Xiaofeng;Yao, Xi;
7:8:2:15     Investigation of DC magnetron-sputtered TiO2 coatings: Effect of coating thickness, structure, and morphology on photocatalytic activity
DOI:10.1016/j.apsusc.2014.06.047  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Daviosdottir, Svava;Shabadi, Rajashekhara;Galca, Aurelian Catalin;Andersen, Inge Ha Id;Dirscherl, Kai;Ambat, Rajan;
7:8:2:16     Microwave dielectric properties of bismuth zinc niobate thin films deposited on alumina by pulsed laser deposition
DOI:10.1016/j.ceramint.2012.10.120  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Wang, Zhao;Ren, Wei;Zhang, Xiaohua;Shi, Peng;Wu, Xiaoqing;Chen, Xiaofeng;
7:8:2:17     The effect of the top electrode interface on the hysteretic behavior of epitaxial ferroelectric Pb(Zr,Ti)O-3 thin films with bottom SrRuO3 electrode
DOI:10.1063/1.4754318  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Pintilie, L.;Pasuk, I.;Negrea, R.;Filip, L. D.;Pintilie, I.;
7:8:2:18     Structures and Dielectric Properties of Bi1.5Zn1.0Nb1.5O7 Thin Films Prepared by Pulsed Laser Deposition at Low Temperature
DOI:10.1080/00150193.2010.484728  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Zhang, Xiaohua;Ren, Wei;Shi, Peng;Xin, Hong;Chen, Xiaofeng;Wu, Xiaoqing;
7:8:3:1     Novel monoclinic zirconolite in Bi2O3-CuO-Ta2O5 ternary system: Phase equilibria, structural and electrical properties
DOI:10.1016/j.jallcom.2013.11.197  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Tan, K. B.;Chon, M. P.;Khaw, C. C.;Zainal, Z.;Yap, Y. H. Taufiq;Tan, P. Y.;
7:8:3:2     Synthesis, structural and electrical properties of novel pyrochlores in the Bi2O3-CuO-Ta2O5 ternary system
DOI:10.1016/j.ceramint.2012.02.007  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Chon, M. P.;Tan, K. B.;Khaw, C. C.;Zainal, Z.;Taufiq-Yap, Y. H.;Tan, P. Y.;
7:8:3:3     Improved dielectric properties of (Bi1.5Zn0.5)(Zn0.5Nb1.5)O-7 by the substitution of Zn2+ on the A site based on the structure characteristics
DOI:10.1016/j.ceramint.2014.03.040  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Li, Lingxia;Jin, Yuxin;Zhang, Ping;
7:8:3:4     Structures and solid solution mechanisms of pyrochlore phases in the systems Bi2O3-ZnO-(Nb, Ta)(2)O-5
DOI:10.1016/j.jallcom.2010.08.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Tan, K. B.;Khaw, C. C.;Lee, C. K.;Zainal, Z.;Miles, G. C.;
7:8:3:5     Structures, phase transformations, and dielectric properties of Bi-2(Zn1-xMgx)(2/3)Nb4/3O7 pyrochlore ceramics as temperature stable LTCC material
DOI:10.1016/j.jallcom.2014.03.074  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Li, Lingxia;Jin, Yuxin;Dong, Helei;Yu, Shihui;Xu, Dan;
7:8:3:6     Phase equilibria and electrical properties of pyrochlore and zirconolite phases in the Bi2O3-ZnO-Ta2O5 system
DOI:10.1016/j.jeurceramsoc.2011.10.012  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:8  AU: Khaw, C. C.;Tan, K. B.;Lee, C. K.;West, A. R.;
7:8:3:7     Effect of Sn4+ substitution on the dielectric properties of Bi2O3-ZnO-Nb2O5 pyrochlores
DOI:10.1016/j.ceramint.2014.07.044  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Li, L. X.;Jin, Y. X.;Dong, H. L.;Yu, S. H.;Xu, D.;
7:8:3:8     Energy band gap and dispersive optical parameters in Bi1.5Zn0.92Nb1.5O6.92 pyrochlore ceramics
DOI:10.1016/j.jallcom.2010.02.170  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Qasrawi, A. F.;Mergen, A.;
7:8:3:9     Effect of Ag on the sintering and dielectric properties behavior of Bi1.5ZnNb1.5O7 ceramics
DOI:10.1016/j.jallcom.2009.10.160  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Liu, Weihong;Wang, Hong;Li, Kecheng;Yao, Xi;
7:8:3:10     Subsolidus phase equilibria and magnetic characterization of the pyrochlore in the Bi2O3-Fe2O3-Sb2Ox system
DOI:10.1016/j.jallcom.2013.06.096  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Egorysheva, A. V.;Ellert, O. G.;Maksimov, Yu. V.;Volodin, V. D.;Efimov, N. N.;Novotortsev, V. M.;
7:8:3:11     Synthesis and characterization of Bi1.5Zn0.92Nb1.5-xSnxO6.92-x/2 pyrochlore ceramics
DOI:10.1016/j.ceramint.2012.01.079  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:10  AU: Qasrawi, A. F.;Kmail, Bayan H.;Mergen, A.;
7:8:3:12     Phase equilibria and dielectric properties of Bi3+(5/2)xMg2-xNb3-(3/2)xO14-x cubic pyrochlores
DOI:10.1016/j.ceramint.2013.08.087  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Tan, P. Y.;Tan, K. B.;Khaw, C. C.;Zainal, Z.;Chen, S. K.;Chon, M. P.;
7:8:3:13     Dielectric properties of cubic bismuth based pyrochlores containing lithium and fluorine
DOI:10.1016/j.jeurceramsoc.2009.06.032  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Banys, Juras;Rudys, Saulius;Ivanov, Maksim;Li, Jing;Wang, Hong;
7:8:3:14     Structural and electrical properties of bismuth magnesium tantalate pyrochlores
DOI:10.1016/j.ceramint.2012.03.050  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Tan, P. Y.;Tan, K. B.;Khaw, C. C.;Zainal, Z.;Chen, S. K.;Chon, M. P.;
7:8:3:15     Synthesis and characterization of the pyrochlore Bi1.56Sb1.48-xNbxCo0.96O7 solid solution
DOI:10.1016/j.jallcom.2009.12.059  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Sellami, Mayouf;Caignaert, Vincent;Bekka, Ahmed;Bettahar, Noureddine;
7:8:3:16     Ba0.7Sr0.3TiO3-glass-silver percolative composite
DOI:10.1016/j.ceramint.2009.06.019  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:3  AU: Deepa, K. S.;Priyatha, P. L.;Parameswaran, P.;Sebastian, M. T.;James, J.;
7:8:3:17     Dielectric properties of Sm, Nd and Fe doped Bi1.5Zn0.92Nb1.5O6.92 pyrochlores
DOI:10.1016/j.ceramint.2010.08.010  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:8  AU: Mergen, A.;Zorlu, H.;Ozdemir, M.;Yumak, M.;
7:8:3:18     Structural, electrical and dielectric properties of Bi1.5Zn0.92Nb1.5-xTaxO6.92 pyrochlore ceramics
DOI:10.1016/j.ceramint.2011.07.046  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Qasrawi, A. F.;Mergen, A.;
7:8:3:19     Effect of yttrium solubility on the structural and optical properties of Bi1.5-xYxZn0.92Nb1.5O6.92 pyrochlore ceramics
DOI:10.1016/j.ceramint.2013.04.050  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Qasrawi, A. F.;Mergen, A.;
7:8:3:20     Influence of matrix conductivity and Coulomb blockade effect on the percolation threshold of insulator-conductor composites
DOI:10.1016/j.compscitech.2013.01.012  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2013
  TC:5  AU: Deepa, K. S.;Gopika, M. S.;James, J.;
7:8:3:21     The Effect of MgO on the Structure and Dielectric Properties of alpha-BZN Ceramics
DOI:10.1080/00150193.2013.838933  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Song Tianxiu;Ding Shihua;Zhang Qian;Zeng Zhuowei;
7:8:4:1     Optimization of PST Thin Films Grown by Sputtering and Complete Dielectric Performance Evaluation: An Alternative Material for Tunable Devices
DOI:10.1111/j.1551-2916.2011.04683.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:11  AU: Lei, Xiuyun;Remiens, Denis;Ponchel, Freddy;Soyer, Caroline;Wang, Genshui;Dong, Xianlin;
7:8:4:2     Perfectly (001)- and (111)-Oriented (Ba,Sr)TiO3 Thin Films Sputtered on Pt/TiOx/SiO2/Si Without Buffer Layers
DOI:10.1111/j.1551-2916.2009.03427.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Yang, Lihui;Wang, Genshui;Dong, Xianlin;Remiens, Denis;
7:8:4:3     Dielectric, ferroelectric and piezoelectric properties of 100-oriented Pb0.4Sr0.6TiO3 thin film sputtered on LaNiO3 electrode
DOI:10.1016/j.jcrysgro.2012.03.026  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:8  AU: Lei, Xiuyun;Remiens, Denis;Sama, Nossikpendou;Chen, Ying;Mao, Chaoliang;Dong, Xianlin;Wang, Genshui;
7:8:4:4     Low-temperature crystallization of high performance Pb0.4Sr0.6TiO3 films compatible with the current silicon-based microelectronic technology
DOI:10.1063/1.4807792  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Li, Kui;Remiens, Denis;Dong, Xianlin;Costecalde, Jean;Sama, Nossikpendou;Li, Tao;Du, Gang;Chen, Ying;Wang, Genshui;
7:8:4:5     Effect of polarization switching cycles on the dielectric response and Rayleigh constant in Pb0.4Sr0.6TiO3 thin films
DOI:10.1063/1.4864761  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Li, Kui;Dong, Xianlin;Remiens, Denis;Li, Tao;Chen, Ying;Wang, Genshui;
7:8:4:6     Enhanced tunability performance of low temperature crystallized Pb0.4Sr0.6TiO3 thin films derived from distinct microstructure
DOI:10.1016/j.matlet.2013.06.058  JN:MATERIALS LETTERS  PY:2013
  TC:5  AU: Li, Kui;Remiens, Denis;Dong, Xianlin;Costecalde, Jean;Sama, Nossikpendou;Lei, Xiuyun;Li, Tao;Du, Gang;Wang, Genshui;
7:8:4:7     The effect of deposition power on the micro-structure and dielectric response of Pb0.4Sr0.6TiO3 thin films
DOI:10.1016/j.ceramint.2013.05.115  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Li, Kui;Remiens, Denis;Du, Gang;Li, Tao;Dong, Xianlin;Wang, Genshui;
7:8:4:8     Low Temperature Deposition of High Performance Lead Strontium Titanate Thin Films by in situ RF Magnetron Sputtering
DOI:10.1111/jace.12198  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Li, Kui;Dong, Xianlin;Remiens, Denis;Lei, Xiuyun;Li, Tao;Du, Gang;Wang, Genshui;
7:8:4:9     Crystallographic orientation dependence of dielectric response in lead strontium titanate thin films
DOI:10.1016/j.jcrysgro.2013.05.017  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:2  AU: Li, Kui;Remiens, Denis;Costecalde, Jean;Sama, Nossikpendou;Du, Gang;Li, Tao;Dong, Xianlin;Wang, Genshui;
7:8:4:10     Effect of LaNiO3 buffer layer on dielectric and tunable properties of Pb0.82La0.08Sr0.1Ti0.98O3 thin films on Pt/Ti/SiO2/Si substrates
DOI:10.1016/jacrysgro.2014.07.016  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:1  AU: Liu, Liu;Tang, Minghua;Tang, Zhenhua;Xu, Dinglin;Li, Linqi;Zhou, Yichun;
7:8:4:11     Polymer-Based Route to Ferroelectric Lead Strontium Titanate Thin Films
DOI:10.1002/app.40901  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2014
  TC:1  AU: Benkler, Manuel;Hobmaier, Jost;Gleissner, Uwe;Medesi, Anna;Hertkorn, Daniel;Hanemann, Thomas;
7:8:5:1     Atomic displacements in the charge ice pyrochlore Bi2Ti2O6O ' studied by neutron total scattering
DOI:10.1103/PhysRevB.81.144113  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Shoemaker, Daniel P.;Seshadri, Ram;Hector, Andrew L.;Llobet, Anna;Proffen, Thomas;Fennie, Craig J.;
7:8:5:2     Bi2Ti2O7: It Is Not What You Have Read
DOI:10.1021/cm202154c  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:26  AU: Esquivel-Elizondo, J. Roberto;Hinojosa, Beverly Brooks;Nino, Juan C.;
7:8:5:3     Incoherent Bi off-centering in Bi2Ti2O6O ' and Bi2Ru2O6O ': Insulator versus metal
DOI:10.1103/PhysRevB.84.064117  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Shoemaker, Daniel P.;Seshadri, Ram;Tachibana, Makoto;Hector, Andrew L.;
7:8:5:4     Capturing dynamic cation hopping in cubic pyrochlores
DOI:10.1063/1.3630005  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Hinojosa, Beverly Brooks;Asthagiri, Aravind;Nino, Juan C.;
7:8:5:5     First-principles calculation of the structure and dielectric properties of Bi2Ti2O7
DOI:10.1103/PhysRevB.82.155103  JN:PHYSICAL REVIEW B  PY:2010
  TC:6  AU: Patterson, Charles H.;
7:8:5:6     Energy landscape in frustrated systems: Cation hopping in pyrochlores
DOI:10.1063/1.4813083  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Hinojosa, Beverly Brooks;Asthagiri, Aravind;Nino, Juan C.;
7:8:5:7     New (Bi1.88Fe0.12)(Fe1.42Te0.58)O-6.87 Pyrochlore with Spin-Glass Transition
DOI:10.1021/cm200281z  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:10  AU: Babu, Gunda Santosh;Valant, Matjaz;Page, Katharine;Llobet, Anna;Kolodiazhnyi, Taras;Axelsson, Anna-Karin;
7:8:5:8     Dielectric Properties and Relaxation of Bi2Ti2O7
DOI:10.1111/jace.12803  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Turner, Christopher G.;Esquivel-Elizondo, J. Roberto;Nino, Juan C.;
7:8:5:9     Pyrochlore Range from Bi2O3-Fe2O3-TeO3 System for LTCC and Photocatalysis and the Crystal Structure of New Bi-3(Fe0.56Te0.44)(3)O-11
DOI:10.1111/j.1551-2916.2011.04801.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:10  AU: Valant, Matjaz;Babu, Gunda Santosh;Vrcon, Mojca;Kolodiazhnyi, Taras;Axelsson, Anna-Karin;
7:8:5:10     Bismuth manganese titanate: Crystal structure and properties
DOI:10.1016/j.ssi.2012.02.051  JN:SOLID STATE IONICS  PY:2012
  TC:4  AU: Piir, I. V.;Sekushin, N. A.;Grass, V. E.;Ryabkov, Y. I.;Chezhina, N. V.;Nekipelov, S. V.;Sivkov, V. N.;Vyalikh, D. V.;
7:8:5:11     Chemistry, structure and properties of bismuth copper titanate pyrochlores
DOI:10.1016/j.ssi.2013.08.041  JN:SOLID STATE IONICS  PY:2014
  TC:0  AU: Piir, I. V.;Koroleva, M. S.;Ryabkov, Yu. I.;Pikalova, E. Yu.;Nekipelov, S. V.;Sivkov, V. N.;Vyalikh, D. V.;
7:8:5:12     Dielectric tunability analysis of pyrochlore Bi1.5Zn1.0Nb1.5O7 using epitaxial films on pyrochlore Bi2Ru2O7 conductive layers
DOI:10.1063/1.4861221  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Nakajima, Mitsumasa;Ikariyama, Rikyu;Krishnan, P. S. Sankara Rama;Yamada, Tomoaki;Funakubo, Hiroshi;
7:8:5:13     Phase Transition in Weberite-Type Gd3NbO7
DOI:10.1111/j.1551-2916.2009.03494.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Cai, Lu;Denev, Sava;Gopalan, Venkatraman;Nino, Juan C.;
7:8:5:14     Effects of Nonstoichiometry and Cocatalyst Loading on the Photocatalytic Hydrogen Production with (Y1.5Bi0.5)(1-x)Ti2O7-3x and (YBi)(1-x)Ti2O7-3x Pyrochlores
DOI:10.1111/jace.12013  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:2  AU: Merka, Oliver;Raisch, Olga;Steinbach, Frank;Bahnemann, Detlef W.;Wark, Michael;
7:8:5:15     A solution chemistry approach to epitaxial growth and stabilisation of Bi2Ti2O7 films
DOI:10.1039/c4ta04352a  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:0  AU: Oropeza, Freddy E.;Villar-Garcia, Ignacio J.;Palgrave, Robert G.;Payne, David J.;
7:8:6:1     Microwave properties of epitaxial (111)-oriented Ba0.6Sr0.4TiO3 thin films on Al2O3(0001) up to 40 GHz
DOI:10.1063/1.3478015  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:17  AU: Yang, Lihui;Ponchel, Freddy;Wang, Genshui;Remiens, Denis;Legier, Jean-Fancois;Chateigner, Daniel;Dong, Xianlin;
7:8:6:2     Tunable Dielectric Characteristics of (111)-Oriented Barium Strontium Titanate Thin Films Deposited on Platinized Si Substrates
DOI:10.1007/s13391-012-2078-y  JN:ELECTRONIC MATERIALS LETTERS  PY:2012
  TC:4  AU: Saravanan, K. Venkata;Sudheendran, K.;Raju, K. C. James;
7:8:6:3     Controlled crystalline orientation of SrTiO3 thin films grown on Pt(111)/Ti/alpha-Al2O3(0001) substrates: Effect of growth temperature and Ti layer thickness
DOI:10.1016/j.apsusc.2014.04.186  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:0  AU: Panomsuwan, Gasidit;Takai, Osamu;Saito, Nagahiro;
7:8:6:4     Atomic-scale characterization of the SrTiO3 Sigma 3 (112) [(1)over-bar10] grain boundary
DOI:10.1103/PhysRevB.81.134109  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Dudeck, K. J.;Benedek, N. A.;Finnis, M. W.;Cockayne, D. J. H.;
7:8:6:5     Epitaxial growth of (111)-oriented BaTiO3/SrTiO3 perovskite superlattices on Pt(111)/Ti/Al2O3(0001) substrates
DOI:10.1063/1.4820780  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Panomsuwan, Gasidit;Takai, Osamu;Saito, Nagahiro;
7:8:6:6     Effects of Ultrathin TiOx Seeding Layer on Crystalline Orientation and Electrical Properties of Sputtered (Ba,Sr)TiO3 Thin Films
DOI:10.1111/j.1551-2916.2010.03677.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Yang, Lihui;Wang, Genshui;Dong, Xianlin;Remiens, Denis;
7:8:6:7     Enhanced tunable dielectric properties of Ba0.5Sr0.5TiO3/Bi1.5Zn1.0Nb1.5O7 multilayer thin films by a sol-gel process
DOI:10.1016/j.tsf.2011.04.118  JN:THIN SOLID FILMS  PY:2011
  TC:11  AU: Yan, Xin;Ren, Wei;Shi, Peng;Wu, Xiaoqing;Yao, Xi;
7:8:6:8     The Effect of Ba/Sr Ratio on Electrical and Optical Properties of BaxSr(1-x)TiO3 (x=0.25; 0.35; 0.45; 0.55) Thin Film Semiconductor
DOI:10.1080/00150193.2012.742351  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Irzaman;Syafutra, Heriyanto;Rancasa, Endang;Nuayi, Abdul Wahidin;Rahman, Tb Gamma Nur;Nuzulia, Nur Aisyah;Supu, Idawati;Sugianto;Tumimomor, Farly;Surianty;Muzikarno, Otto;Masrur;
7:8:6:9     Enhanced memory window of Au/BaTiO3/SrTiO3/Si(001) MFIS structure with high c-axis orientation for non-volatile memory applications
DOI:10.1007/s00339-012-7011-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:6  AU: Panomsuwan, Gasidit;Takai, Osamu;Saito, Nagahiro;
7:8:6:10     Unusual Curie Point Independence of Thickness and Interfacial Properties for Perfectly (111)-Oriented Ba0.6Sr0.4TiO3 Thin Films
DOI:10.1111/j.1551-2916.2010.03877.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:1  AU: Yang, Lihui;Wang, Genshui;Dong, Xianlin;Remiens, Denis;
7:8:6:11     Microwave characterization of tunable interdigitated capacitances on BaTiSnO3 thin films deposited by sol-gel
DOI:10.1063/1.4895766  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Waldhoff, Nicolas;Fasquelle, Didier;Blary, Karine;
7:8:6:12     Tunable Interdigitated Capacitances on Ba0.3Sr0.7TiO3 Thin-Film
DOI:10.1080/10584587.2013.780151  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Ghalem, Areski;Ponchel, Freddy;Remiens, Denis;Legier, Jean-Francois;Lasri, Tuami;
7:8:6:13     Growth of Highly (100)-Oriented SrTiO3 Thin Films on Si(111) Substrates Without Buffer Layer
DOI:10.1111/jace.12912  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Panomsuwan, Gasidit;Takai, Osamu;Saito, Nagahiro;
7:8:6:14     MOCVD growth of barium-strontium titanate films using newly developed barium and strontium precursors
DOI:10.1016/j.tsf.2009.12.053  JN:THIN SOLID FILMS  PY:2010
  TC:1  AU: Shuster, G.;Kreinin, O.;Lakin, E.;Kuzmina, N. P.;Zolotoyabko, E.;
7:8:7:1     Dielectric microwave characterizations of (Ba,Sr)TiO3 film deposited on high resistivity silicon substrate: Analysis by two-dimensional tangential finite element method
DOI:10.1063/1.3309423  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Ponchel, F.;Midy, J.;Legier, J. F.;Soyer, C.;Remiens, D.;Lasri, T.;Gueguan, G.;
7:8:7:2     A fully distributed non linear waveguide using (Pb,Sr)TiO3 thin film: Second and third harmonics generation
DOI:10.1063/1.4831660  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Ponchel, F.;Burgnies, L.;Ducatteau, D.;Lheurette, E.;Remiens, D.;Lippens, D.;
7:8:7:3     Rigorous extraction tunability of Si-integrated Ba0.3Sr0.7TiO3 thin film up to 60 GHz
DOI:10.1063/1.3454772  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:7  AU: Ponchel, Freddy;Legier, Jean-Fancois;Soyer, Caroline;Remiens, Denis;Midy, Jean;Lasri, Tuami;Gueguan, Guillaume;
7:8:7:4     X-ray combined analysis of fiber-textured and epitaxial Ba(Sr,Ti)O-3 thin films deposited by radio frequency sputtering
DOI:10.1063/1.3592282  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Remiens, D.;Yang, L.;Ponchel, F.;Legier, J. F.;Chateigner, D.;Wang, G.;Dong, X.;
7:8:7:5     Microwave evaluation of Pb0.4Sr0.6TiO3 thin films prepared by magnetron sputtering on silicon: Performance comparison with Ba0.3Sr0.7TiO3 thin films
DOI:10.1063/1.3656065  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Ponchel, F.;Lei, X.;Remiens, D.;Wang, G.;Dong, X.;
7:8:7:6     Dielectric dispersion of BaSrTiO3 thin film from centimeter to submillimeter wavelengths
DOI:10.1063/1.3531534  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Houzet, Gregory;Blary, Karine;Lepilliet, Sylvie;Lippens, Didier;Burgnies, Ludovic;Velu, Gabriel;Carru, Jean-Claude;Nguema, Edwin;Mounaix, Patrick;
7:8:7:7     Dielectric relaxation analysis of Pb(Zr-0.54,Ti-0.46)O-3 thin films: Electric field dependence
DOI:10.1063/1.4904514  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Ponchel, F.;Sama, N.;Remiens, D.;Lasri, T.;
7:8:7:8     Oxygen effects on barium strontium titanate morphology and MOS device performance
DOI:10.1016/j.matlet.2012.11.003  JN:MATERIALS LETTERS  PY:2013
  TC:3  AU: Abdel-Motaleb, Ibrahim;Akula, Bhavya;Leedy, Kevin;Cortez, Rebecca;
7:8:7:9     Ionic Polarization Occurrence in BaSrTiO3 Thin Film by THz-Time Domain Spectroscopy
DOI:10.1080/00150193.2012.677682  JN:FERROELECTRICS  PY:2012
  TC:2  AU: Houzet, G.;Blary, K.;Lepilliet, S.;Lippens, D.;Burgnies, L.;Velu, G.;Carru, J. C.;Nguema, E.;Mounaix, P.;
7:8:7:10     Structural and multiferroic properties of Fe-doped Ba0.5Sr0.5TiO3 solids
DOI:10.1016/j.jmmm.2012.08.023  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Guo, Zhengang;Pan, Liqing;Bi, Chong;Qiu, Hongmei;Zhao, Xuedan;Yang, Lihong;Rafique, M. Yasir;
7:8:7:11     Electrical, Dielectric and Magnetic Properties of CoFe2O4-BaTiO3 Composite Films with Core-Shell Structure
DOI:10.1080/00150193.2010.484668  JN:FERROELECTRICS  PY:2010
  TC:6  AU: Zhang, Ling;Zhai, Jiwei;Mo, Weifeng;Yao, Xi;
7:8:7:12     Influence of Annealing Temperature on Magnetoelectric Properties of CoFe2O4/Pt/Pb(Z(r0.3)T(i0.7)) O-3 Thin Films
DOI:10.1080/00150193.2014.894370  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Eum, Y. J.;Hwang, S. -O.;Ryu, J.;Kim, J. -W.;Koo, C. Y.;Lee, J. -Y.;Lee, H. Y.;
7:8:8:1     Magnonic crystals-based tunable microwave phase shifters
DOI:10.1063/1.4890476  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhu, Y.;Chi, K. H.;Tsai, C. S.;
7:8:8:2     Electrically and magnetically tunable phase shifters based on a barium strontium titanate-yttrium iron garnet layered structure
DOI:10.1063/1.3486463  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:10  AU: Leach, J. H.;Liu, H.;Avrutin, V.;Rowe, E.;Oezguer, Ue;Morkoc, H.;Song, Y.-Y.;Wu, M.;
7:8:8:3     High-frequency susceptibility of a weak ferromagnet with magnetostrictive magnetoelectric coupling: Using heterostructures to tailor electromagnon frequencies
DOI:10.1103/PhysRevB.81.094405  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Livesey, K. L.;Stamps, R. L.;
7:8:8:4     Nonlinear multiferroic phase shifters for microwave frequencies
DOI:10.1063/1.4864315  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Ustinov, Alexey B.;Kalinikos, Boris A.;Srinivasan, G.;
7:8:8:5     Magnetically tunable double-negative material composed of ferrite-dielectric and metallic mesh
DOI:10.1063/1.3359718  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:18  AU: He, Guanghua;Wu, Rui-xin;Poo, Yin;Chen, Ping;
7:8:8:6     Self-generation and management of spin-electromagnetic wave solitons and chaos
DOI:10.1063/1.4881889  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ustinov, Alexey B.;Kondrashov, Alexandr V.;Nikitin, Andrey A.;Kalinikos, Boris A.;
7:8:8:7     All-thin-film multilayered multiferroic structures with a slot-line for spin-electromagnetic wave devices
DOI:10.1063/1.4867985  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Nikitin, Andrey A.;Ustinov, Alexey B.;Semenov, Alexander A.;Kalinikos, Boris A.;Lahderanta, E.;
7:8:8:8     Hybridization of electromagnetic, spin and acoustic waves in magnetic having conical spiral ferromagnetic order
DOI:10.1016/j.jmmm.2012.10.021  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:7  AU: Bychkov, Igor V.;Kuzmin, Dmitry A.;Shavrov, Vladimir G.;
7:8:8:9     Excitation spectrum of multiferroics at finite temperatures
DOI:10.1103/PhysRevB.83.134409  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Michael, Thomas;Trimper, Steffen;
7:8:8:10     Sub-THz dielectric resonance in single crystal yttrium iron garnet and magnetic field tuning of the modes
DOI:10.1063/1.3607873  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Popov, M. A.;Zavislyak, I. V.;Srinivasan, G.;
7:8:8:11     Iron based microstrip phase shifter; optimization of phase shift
DOI:10.1063/1.3672843  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Kuanr, Bijoy K.;Fal, T. J.;Celinski, Z.;Camley, R. E.;
7:8:8:12     Soliton generation in active nonlinear metamaterials
DOI:10.1063/1.4866856  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:5  AU: Kozyrev, Alexander B.;Shadrivov, Ilya V.;Kivshar, Yuri S.;
7:8:8:13     A magnetically- and electrically-tunable microwave phase shifter using yttrium iron garnet/gadolinium gallium garnet thin film
DOI:10.1063/1.3671779  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Zhu, Yun;Qiu, Gang;Tsai, Chen S.;
7:8:9:1     Strain-assisted control of high stable dielectric tunability in (100) oriented (Pb,Sr)TiO3 thin films
DOI:10.1016/j.jallcom.2013.04.101  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Zheng, Zan;Hu, Tao;Yao, Yiying;Weng, Wenjian;Han, Gaorong;Ma, Ning;Du, Piyi;
7:8:9:2     Control of tensile stress on inducing formation and tunability of (100) oriented PbxSr1-xTiO3 thin films
DOI:10.1007/s00339-014-8490-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Hu, Tao;Fu, Hao;Zheng, Zan;Ma, Ning;Du, Piyi;
7:8:9:3     High dielectric tunability of (100) oriented PbxSr1-xTiO3 thin film coordinately controlled by dipole activation and phase anisotropy
DOI:10.1063/1.3671645  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Zheng, Zan;Yao, Yiying;Weng, Wenjian;Han, Gaorong;Ma, Ning;Du, Piyi;
7:8:9:4     Hybrid influences of defect dipole and intrinsic inducing field on orientation of PbTiO3 thin film deposited on Indium Tin Oxide/glass substrate
DOI:10.1016/j.tsf.2011.11.050  JN:THIN SOLID FILMS  PY:2012
  TC:4  AU: Zheng, Zan;Yao, Yiying;Weng, Wenjian;Han, Gaorong;Ma, Ning;Du, Piyi;
7:8:9:5     Multilayer Bi1.5Zn1.0Nb1.5O7/Ba0.6Sr0.4TiO3/Bi1.5Zn1.0Nb1.5O7 thin films for tunable microwave applications
DOI:10.1016/j.apsusc.2010.09.076  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:8  AU: Singh, Jitendra;Krupanidhi, S. B.;
7:8:9:6     Dipole azimuth dependent permittivity in randomly and (100) oriented (Pb,Sr) TiO3 thin films
DOI:10.1039/c1jm11085c  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:8  AU: Zheng, Zan;Yao, Yiying;Weng, Wenjian;Han, Gaorong;Ma, Ning;Du, Piyi;
7:8:9:7     The effect of Tb doped PbTiO3 inducing layer on texture and tunable property of sol-gel derived Pb0.4Sr0.6TiO3 thin films grown on ITO/glass substrate
DOI:10.1016/j.jcrysgro.2010.11.096  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:6  AU: Li, X. T.;Wang, B.;Weng, W. J.;Han, G. R.;Song, C. L.;Ma, N.;Du, P. Y.;
7:8:9:8     Size effects in Fe3+-doped PbTiO3 nanocrystals-Formation and orientation of (Fe-Ti '-V-O(center dot center dot))(center dot) defect-dipoles
DOI:10.1016/j.jeurceramsoc.2009.04.034  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Erdem, Emre;Kiraz, Kamil;Somer, Mehmet;Eichel, Ruediger-A.;
7:8:9:9     High-temperature dielectric response in pulsed laser deposited Bi1.5Zn1.0Nb1.5O7 thin films
DOI:10.1063/1.3457335  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Singh, Jitendra;Kalghatgi, A. T.;Parui, Jayanta;Krupanidhi, S. B.;
7:8:9:10     Structure, morphology and optical properties of multilayered sol-gel BaTi0.85Zr0.15O3 thin films
DOI:10.1016/j.apsusc.2012.11.036  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:3  AU: Vasilescu, Catalina A.;Crisan, Maria;Ianculescu, Adelina C.;Raileanu, Malina;Gartner, Mariuca;Anastasescu, Mihai;Dragan, Nicolae;Crisan, Dorel;Gavrila, Raluca;Trusca, Roxana;
7:8:10:1     Large three-photon absorption in Ba0.5Sr0.5TiO3 films studied using Z-scan technique
DOI:10.1063/1.3447930  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:21  AU: Saravanan, K. Venkata;Raju, K. C. James;Krishna, M. Ghanashyam;Tewari, Surya P.;Rao, S. Venugopal;
7:8:10:2     Sterically demanding zinc(II) phthalocyanines: synthesis, optical, electrochemical, nonlinear optical, excited state dynamics studies
DOI:10.1039/c3tc31640h  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:8  AU: Swain, Debasis;Singh, Radhakant;Singh, Varun Kumar;Krishna, Narra Vamsi;Giribabu, Lingamallu;Rao, Soma Venugopal;
7:8:10:3     Ultrafast excited state dynamics and dispersion studies of nonlinear optical properties in dinaphthoporphycenes
DOI:10.1063/1.3701274  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:15  AU: Swain, Debasis;Anusha, P. T.;Prashant, T. Shuvan;Tewari, Surya P.;Sarma, Tridib;Panda, Pradeepta K.;Rao, S. Venugopal;
7:8:10:4     Large femtosecond third-order optical nonlinearity of Bi3.15Nd0.85Ti3O12 ferroelectric thin films
DOI:10.1063/1.4900758  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, S.;Zhong, X. L.;Cheng, G. H.;Liu, X.;Wang, J. B.;Huang, J.;Song, H. J.;Tan, C. B.;Li, B.;Zhou, Y. C.;
7:8:10:5     Picosecond nonlinear optical studies of unsymmetrical alkyl and alkoxy phthalocyanines
DOI:10.1016/j.matlet.2010.06.004  JN:MATERIALS LETTERS  PY:2010
  TC:30  AU: Anusha, P. T.;Reeta, P. Silviya;Giribabu, L.;Tewari, Surya P.;Rao, S. Venugopal;
7:8:10:6     Thiazole based novel functional colorants: Synthesis, characterization and nonlinear optical studies using picosecond Z-scan technique
DOI:10.1016/j.optmat.2012.11.018  JN:OPTICAL MATERIALS  PY:2013
  TC:3  AU: Singh, Balvant Shyam;Lobo, Hyacintha Rennet;Podagatlapalli, G. Krishna;Rao, S. Venugopal;Shankarling, Ganapati Subray;
7:8:10:7     Tuning the Structural and Optical Properties of Bismuth Titanate by Different Nd Substitution Content
DOI:10.1080/10584587.2012.670058  JN:INTEGRATED FERROELECTRICS  PY:2012
  TC:4  AU: Zang, Yongyuan;Xie, Dan;Chen, Yu;Wu, Xiao;Li, Gang;Plant, David;
7:8:10:8     Enhanced femtosecond optical nonlinearity of Mn doped Ba0.6Sr0.4TiO3 films
DOI:10.1063/1.3527969  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Ning, Tingyin;Chen, Cong;Wang, Can;Zhou, Yueliang;Zhang, Dongxiang;Ming, Hai;Yang, Guozhen;
7:8:10:9     Effect of lanthanum doping on linear and nonlinear-optical properties of Bi3TiNbO9 thin films
DOI:10.1016/j.jallcom.2011.02.048  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Chen, Hengzhi;Yang, Bin;Zhang, Mingfu;Wang, Feiyan;Cheah, Kokwai;Cao, Wenwu;
7:8:10:10     Optical anisotropy in bismuth titanate: An experimental and theoretical study
DOI:10.1063/1.4870460  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Roy, Amritendu;Prasad, Rajendra;Auluck, Sushil;Garg, Ashish;
7:8:10:11     Reverse saturation absorption spectra and optical limiting properties of chlorinated tetrasubstituted phthalocyanines containing different metals
DOI:10.1016/j.optmat.2012.05.018  JN:OPTICAL MATERIALS  PY:2012
  TC:8  AU: Tuhl, Ahmad;Manaa, Hacene;Makhseed, Saad;Al-Awadi, Nouria;Mathew, Jacob;Ibrahim, Hamada Mohamed;Nyokong, Tebello;Behbehani, Haider;
7:8:10:12     Microwave characteristics of sol-gel based Ag-doped (Ba0.6Sr0.4)TiO3 thin films
DOI:10.1016/j.tsf.2014.06.047  JN:THIN SOLID FILMS  PY:2014
  TC:2  AU: Kim, Kyoung-Tae;Kim, Cheolbok;Senior, David E.;Kim, Dongsu;Yoon, Yong-Kyu;
7:8:10:13     Indium(III) and Gallium(III) phthalocyanines-based nanohybrid materials for optical limiting
DOI:10.1016/j.matchemphys.2012.09.005  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:3  AU: Gu, Huili;Li, Shuai;Wang, Jun;Blau, Werner J.;Chen, Yu;
7:8:10:14     Study on third-order nonlinear optical properties of 4-methylsulfanyl chalcone derivatives using picosecond pulses
DOI:10.1016/j.materresbull.2012.06.063  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:7  AU: D'silva, E. D.;Podagatlapalli, G. Krishna;Rao, S. Venugopal;Dharmaprakash, S. M.;
7:8:11:1     Fabrication of PbS nanoparticle coated amorphous carbon nanotubes: Structural, thermal and field emission properties
DOI:10.1016/j.materresbull.2011.06.006  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:16  AU: Jana, S.;Banerjee, D.;Jha, A.;Chattopadhyay, K. K.;
7:8:11:2     Magnetron sputtering derived (100) oriented Pb0.4Sr0.6(Ti0.97Mg0.03)O-2.97 thin film on inducing-layer/glass substrate with outstanding tunability
DOI:10.1016/j.apsusc.2013.10.002  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: Fang, Junfei;Hu, Tao;Chen, Jingfeng;Han, Gaorong;Weng, Wenjian;Ma, Ning;Du, Piyi;
7:8:11:3     Electromagnetic and microwave absorbing properties of amorphous carbon nanotube-cadmium selenide quantum dot hybrids
DOI:10.1016/j.matchemphys.2012.12.006  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2013
  TC:4  AU: Tan, Kim Han;Ahmad, Roslina;Johan, Mohd Rafie;
7:8:11:4     Synthesis and size dependent optical studies in CdSe quantum dots via inverse micelle technique
DOI:10.1016/j.matchemphys.2010.06.053  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:19  AU: Hamizi, Nor Aliya;Johan, Mohd Rafie;
7:8:11:5     Enhanced Visible Light Absorption by 3C-SiC Nanoparticles Embedded in Si Solar Cells by Plasma-Enhanced Chemical Vapor Deposition
DOI:10.1155/2013/953790  JN:JOURNAL OF NANOMATERIALS  PY:2013
  TC:0  AU: Parida, Bhaskar;Choi, Jaeho;Lim, Gyoungho;Kim, Kiseok;Kim, Keunjoo;
7:8:11:6     Surface structure and optical property of amorphous carbon nanotubes hybridized with cadmium selenide quantum dots
DOI:10.1007/s11051-013-1920-y  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:1  AU: Tan, Kim Han;Johan, Mohd Rafie;
7:8:11:7     Physico-chemical studies of amorphous carbon nanotubes synthesized at low temperature
DOI:10.1016/j.materresbull.2012.04.073  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:11  AU: Tan, Kim Han;Ahmad, Roslina;Leo, Bey Fen;Yew, Ming Chian;Ang, Bee Chin;Johan, Mohd Rafie;
7:8:11:8     One dimensional silicon nanostructures prepared by oxidized porous silicon under heat treatment
DOI:10.1016/j.apsusc.2014.08.108  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:1  AU: Vendamani, V. S.;Pathak, A. P.;Rao, S. V. S. Nageswara;
7:8:12:1     Bi1.5Mg1.0Nb1.5O7/Ba0.6Sr0.4TiO3 bilayer thin films prepared by pulsed laser deposition
DOI:10.1016/j.jallcom.2014.05.217  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Yu, Shihui;Li, Lingxia;Zhang, Ning;Dong, Helei;Xu, Dan;Zhang, Weifeng;
7:8:12:2     Dielectric and tunable properties of Zr doped BST ceramics prepared by spark plasma sintering
DOI:10.1016/j.jallcom.2012.04.010  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:7  AU: Wang, Xilin;Huang, Rongxia;Zhao, Yongjie;Zhao, Yuzhen;Zhou, Heping;Jia, Zhidong;
7:8:12:3     Structure and ferroelectric studies of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3 piezoelectric ceramics
DOI:10.1016/j.materresbull.2013.05.108  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:8  AU: Ramana, Venkata E.;Mahajan, A.;Graca, M. P. F.;Mendiratta, S. K.;Monteiro, J. M.;Valente, M. A.;
7:8:12:4     Enhanced microwave dielectric tunability of Ba0.5Sr0.5TiO3 thin films grown with reduced strain on DyScO3 substrates by three-step technique
DOI:10.1063/1.4789008  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Liu, Hongrui;Avrutin, Vitaliy;Zhu, Congyong;Oezguer, Uemit;Yang, Juan;Lu, Changzhi;Morkoc, Hadis;
7:8:12:5     Dielectric properties of low-temperature sintered Ba0.6Sr0.4TiO3 thick films prepared by reactive sintering method
DOI:10.1016/j.jallcom.2011.06.121  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:6  AU: Zhang, Minghui;Wang, Hong;Yang, Haibo;Wu, Xinguang;Liu, Weihong;Yao, Xi;
7:8:12:6     The structural and electrical properties of Mn-doped Ba0.6Sr0.4TiO3 films prepared by metal organic deposition method
DOI:10.1016/j.jallcom.2013.04.154  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Wang, Xiaofei;Lv, Shijie;Zhang, Chao;Hu, Qiubo;Li, Liben;
7:8:12:7     BaxSr1-xTiO3 thin films prepared by OTS monomolecular film reverse induction and liquid phase self-assembly method
DOI:10.1016/j.jallcom.2012.11.049  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Zhao Gaoyang;Tan Guoqiang;Yin Jun;Han Weiguang;Xia Ao;Ren Huijun;
7:8:13:1     Raman spectroscopy evidence of inhomogeneous disorder in the bismuth-oxygen framework of Bi25InO39 and other sillenites
DOI:10.1103/PhysRevB.86.144116  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Arenas, D. J.;Jegorel, Theo;Knab, Chris;Gasparov, L. V.;Martin, C.;Pajerowski, Daniel M.;Kohno, Hideo;Lufaso, Michael W.;
7:8:13:2     Electron diffraction study of the sillenites Bi12SiO20, Bi25FeO39 and Bi25InO39: Evidence of short-range ordering of oxygen-vacancies in the trivalent sillenites
DOI:10.1063/1.4893341  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Scurti, Craig A.;Auvray, Nicolas;Lufaso, Michael W.;Takeda, Seiji;Kohno, Hideo;Arenas, D. J.;
7:8:13:3     Structural, linear and enhanced third-order nonlinear optical properties of Bi12SiO20 nanocrystals
DOI:10.1016/j.matchemphys.2011.06.010  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:9  AU: Sekhar, H.;Kiran, P. Prem;Rao, D. Narayana;
7:8:13:4     High pressure stability of bismuth sillenite: A Raman spectroscopic and x-ray diffraction study
DOI:10.1063/1.3496659  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Rao, Rekha;Garg, Alka B.;Sakuntala, T.;
7:8:13:5     Optical recording mechanisms in undoped titanosillenite crystals
DOI:10.1063/1.3533421  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Jerez, Vladimir;de Oliveira, Ivan;Frejlich, Jaime;
7:8:13:6     Synthesis and characterization of strontium and barium bismuth borate glass-ceramics
DOI:10.1016/j.jnoncrysol.2014.01.037  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2014
  TC:1  AU: Rejisha, S. R.;Anjana, P. S.;Gopakumar, N.;Santha, N.;
7:8:13:7     Low temperature synthesis, structural, and magnetic characterization of manganese sillenite Bi12MnO20
DOI:10.1063/1.3362927  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: de Oliveira, L. A. S.;Sinnecker, J. P.;Vieira, M. D.;Penton-Madrigal, A.;
7:8:13:8     Optical recording mechanisms in undoped titanosillenite crystals (vol 109, 024901, 2011)
DOI:10.1063/1.3587177  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Jerez, Vladimir;de Oliveira, Ivan;Frejlich, Jaime;
7:8:14:1     Investigation of initial epitaxial growth of (Ba, Sr)TiO3 thin film on (001) SrTiO3 substrate using first-principles calculations
DOI:10.1016/j.jallcom.2013.01.082  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Wei, L. J.;Guo, J. X.;Ge, D. Y.;Dai, X. H.;Guan, L.;Wang, Y. L.;Liu, B. T.;
7:8:14:2     Effect of bottom electrode on the microstructure and electrical properties of sputtered BaTiO3 films on MgO substrates
DOI:10.1016/j.jallcom.2013.06.093  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Zhang, Wei;Kang, Limin;Yuan, Meiling;Yang, Qian;Ouyang, Jun;
7:8:14:3     Enhanced dielectric constant and fatigue-resistance of PbZr0.4Ti0.6O3 capacitor with magnetic intermetallic FePt top electrode
DOI:10.1063/1.3457382  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Liu, B. T.;Zhao, J. W.;Li, X. H.;Zhou, Y.;Bian, F.;Wang, X. Y.;Zhao, Q. X.;Wang, Y. L.;Guo, Q. L.;Wang, L. X.;Zhang, X. Y.;
7:8:14:4     Impedance spectroscopic and dielectric analysis of Ba0.7Sr0.3TiO3 thin films
DOI:10.1016/j.jallcom.2012.02.137  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:12  AU: Rouahi, A.;Kahouli, A.;Sylvestre, A.;Defay, E.;Yangui, B.;
7:8:14:5     In situ preparation of high dielectric constant, low-loss ferroelectric BaTiO3 films on Si at 500 degrees C
DOI:10.1016/j.apsusc.2013.01.023  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:3  AU: Yuan, Meiling;Zhang, Wei;Wang, Xianyang;Pan, Wei;Wang, Li;Ouyang, Jun;
7:8:14:6     Investigation of periodic Ni-Ti multilayers
DOI:10.1016/j.tsf.2013.06.001  JN:THIN SOLID FILMS  PY:2013
  TC:0  AU: Veres, T.;Cser, L.;Bodnarchuck, V.;Ignatovich, V.;Horvath, Z. E.;Nagy, B.;
7:8:14:7     Modelling and simulation of reaction mechanisms in early growth of STO thin films from ab initio calculations
DOI:10.1016/j.commatsci.2010.06.034  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2010
  TC:1  AU: Yang, Chun;Yi, Yu;Li, Yan Rong;
7:8:15:1     Improved Dielectric Properties of Bi1.5Zn1.0Nb1.5O7/(111)-Oriented Ba0.6Sr0.4TiO3 Bilayered Films for Tunable Microwave Applications
DOI:10.1111/j.1551-2916.2009.03516.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:11  AU: Yang, Lihui;Wang, Genshui;Dong, Xianlin;Remiens, Denis;
7:8:15:2     Enhanced tunability of Bi3/2MNb3/2O7 (M=Zn, Mg, Ni) thin films
DOI:10.1016/j.matlet.2012.07.087  JN:MATERIALS LETTERS  PY:2012
  TC:4  AU: Ning, Pingfan;Li, Lingxia;Zhang, Xiaoyu;Wang, Mingjing;Xia, Wangsuo;
7:8:15:3     Coupled microstrip line microwave phase shifter using ferroelectric thin film varactors
DOI:10.1063/1.3686615  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Sheng, Su;Ong, C. K.;
7:8:15:4     Study of dielectric loss mechanisms in Bi1.5MgNb1.5O7 thin film varactors
DOI:10.1063/1.4812586  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Gao, Libin;Jiang, Shuwen;Xiao, Yong;Li, Ruguan;Li, Yanrong;
7:8:15:5     Microwave Properties of Bi1.5Zn1.0Nb1.5O7/Ba0.6Sr0.4TiO3 Hetero Layered Films Directly Sputtered on Si up to 50 GHz
DOI:10.1111/j.1551-2916.2011.04610.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Yang, Lihui;Wang, Genshui;Dong, Xianlin;Ponchel, Freddy;Remiens, Denis;
7:8:15:6     Suppression of slow capacitance relaxation phenomenon in Pt/Ba0.3Sr0.7TiO3/Pt thin film ferroelectric structures by annealing in oxygen atmosphere
DOI:10.1063/1.4863436  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Altynnikov, A. G.;Gagarin, A. G.;Gaidukov, M. M.;Tumarkin, A. V.;Petrov, P. K.;Alford, N.;Kozyrev, A. B.;
7:8:16:1     Large dielectric tuning and microwave phase shift at low electric field in epitaxial Ba0.5Sr0.5TiO3 on SrTiO3
DOI:10.1063/1.3359707  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:15  AU: Leach, J. H.;Liu, H.;Avrutin, V.;Xiao, B.;Ozgur, U.;Morkoc, H.;Das, J.;Song, Y. Y.;Patton, C. E.;
7:8:16:2     The structure and dielectric properties of a novel kind of doped Ba0.6Sr0.4TiO3 film
DOI:10.1016/j.matchemphys.2012.06.009  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:13  AU: Liao, Jiaxuan;Wei, Xubo;Xu, Ziqiang;Wei, Xiongbang;Wang, Peng;
7:8:16:3     Preparation and Dielectric Properties of Cerium and Manganese Codoped Ba0.6Sr0.4TiO3 Ferroelectric Films
DOI:10.1080/10584587.2013.787521  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:2  AU: Liao, Jiaxuan;Wang, Peng;Wei, Xubo;Xu, Ziqiang;Wei, Xiongbang;Yang, Bangchao;
7:8:16:4     A Novelly Designed Ba0.6Sr0.4TiO3 Film with High Tunability and Low Dielectric Loss
DOI:10.1080/10584587.2014.901868  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Liao, Jiaxuan;Huang, Jiaqi;Wei, Xubo;Xu, Ziqiang;Wang, Peng;
7:8:16:5     Improved Mechanisms for Excellent Tunable Microwave Ce and Mn Codoped Ba0.6Sr0.4TiO3 Thin Films
DOI:10.1080/10584587.2014.901875  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Liao, Jiaxuan;Wang, Sizhe;Wei, Xubo;Xu, Ziqiang;Wang, Peng;
7:8:16:6     Influence of Film Thickness on Dielectric Properties of Y and Mn Alternately Doped BST Films
DOI:10.1080/10584587.2014.901873  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Zhang, Weifang;Liao, Jiaxuan;Huang, Jiaqi;
7:8:16:7     Enhanced ferroelectric properties of Mg doped (Ba,Sr)TiO3 thick films grown on (001) SrTiO3 substrates
DOI:10.1016/j.tsf.2011.12.019  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Liu, Hong;Zhu, Jianguo;Chen, Qiang;Yu, Ping;Xiao, Dingquan;
7:8:17:1     Highly tunable microwave stub resonator on ferroelectric KTa0.5Nb0.5O3 thin film
DOI:10.1063/1.3626040  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Simon, Q.;Corredores, Y.;Castel, X.;Benzerga, R.;Sauleau, R.;Mahdjoubi, K.;Le Febvrier, A.;Deputier, S.;Guilloux-Viry, M.;Zhang, L.;Laurent, P.;Tanne, G.;
7:8:17:2     Development of a microwave capacitive method for the spectroscopy of the complex permittivity
DOI:10.1063/1.4902317  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Jegou, C.;Agnus, G.;Maroutian, T.;Pillard, V.;Devolder, T.;Crozat, P.;Lecoeur, P.;Aubert, P.;
7:8:17:3     Temperature dependence of the conduction mechanisms through a Pb(Zr,Ti)O-3 thin film
DOI:10.1016/j.tsf.2013.12.043  JN:THIN SOLID FILMS  PY:2014
  TC:1  AU: Jegou, C.;Michalas, L.;Maroutian, T.;Agnus, G.;Koutsoureli, M.;Papaioannou, G.;Largeau, L.;Troadec, D.;Leuliet, A.;Aubert, P.;Lecoeur, Ph.;
7:8:17:4     Characterization in a Wide Frequency Range (40MHz-67GHz) of a KTa0.65Nb0.35O3 Thin Film for Tunable Applications
DOI:10.1080/10584587.2014.957091  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Houzet, Gregory;Lacrevaz, Thierry;Bermond, Cedric;Flechet, Bernard;Le Febvrier, Arnaud;Deputier, Stephanie;Guilloux-Viry, Maryline;Queffelec, Patrick;
7:8:17:5     Intercomparison of permittivity measurement techniques for ferroelectric thin layers
DOI:10.1063/1.4858388  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:5  AU: Queffelec, P.;Laur, V.;Chevalier, A.;Le Floch, J. -M.;Passerieux, D.;Cros, D.;Madrangeas, V.;Le Febvrier, A.;Deputier, S.;Guilloux-Viry, M.;Houzet, G.;Lacrevaz, T.;Bermond, C.;Flechet, B.;
7:8:17:6     Study of ferroelectric/dielectric multilayers for tunable stub resonator applications at microwaves
DOI:10.1016/j.tsf.2013.11.068  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Corredores, Y.;Le Febvrier, A.;Castel, X.;Sauleau, R.;Benzerga, R.;Deputier, S.;Guilloux-Viry, M.;Mekadmini, A.;Martin, N.;Tanne, G.;
7:8:18:1     Dielectric properties of La/Mn codoped Ba0.63Sr0.37TiO3 thin films prepared by RF magnetron sputtering
DOI:10.1016/j.ceramint.2014.04.039  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Song, Lirong;Chen, Ying;Wang, Genshui;Yang, Lihui;Li, Tao;Gao, Feng;Dong, Xianlin;
7:8:18:2     Electrically Programmable Bistable Capacitor for High-Frequency Applications Based on Charge Storage at the (Ba,Sr)TiO3/Al2O3 Interface
DOI:10.1002/adfm.201200405  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:4  AU: Li, Shunyi;Zheng, Yuliang;Jakoby, Rolf;Klein, Andreas;
7:8:18:3     Microstructure and electrical properties of Mn-doped barium strontium titanate thin films prepared on copper foils
DOI:10.1016/j.apsusc.2010.04.042  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:16  AU: Fan, Yanhua;Yu, Shuhui;Sun, Rong;Li, Lei;Yin, Yansheng;Wong, Ka-Wai;Du, Ruxu;
7:8:18:4     Fabrication and Dielectric Properties of Ba0.63Sr0.37TiO3 Thin Films on SiC Substrates
DOI:10.1111/jace.13218  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Song, Lirong;Chen, Ying;Wang, Genshui;Yang, Lihui;Ge, Jun;Dong, Xianlin;Xiang, Pinghua;Zhang, Yuanyuan;Tang, Xiaodong;
7:8:18:5     Preparation and characterization of La-doped Ba(1-x)SrxTiO3 powders and thin films
DOI:10.1016/j.tsf.2009.10.036  JN:THIN SOLID FILMS  PY:2010
  TC:4  AU: Hao, Su-E;Wang, Chun-Yan;Fu, Dong-Sheng;Zhang, Ju-Sheng;Wei, Yuan;Wang, Wei-Li;
7:8:18:6     Characterization of Manganese Ions in Mn-substituted Ba0.67Sr0.33MnxTi1-xO3 Thin Films
DOI:10.1080/00150193.2013.842859  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Chen, Xiaoyang;Yang, Chunli;Fan, Minglei;Xu, Zunping;Zhu, Jianguo;Yu, Ping;
7:8:19:1     Electrical Properties of Lead-free Niobium Rich Piezoelectric (K0.95Li0.05) (Ta1-xNbx) O-3 Single Crystals
DOI:10.1080/10584587.2011.637010  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:9  AU: Li, Jun;Li, Yang;Zhou, Zhongxiang;Guo, Ruyan;Bhalla, Amar;
7:8:19:2     Frequency Dependent Electro-Optic Properties of Potassium Lithium Tantalate Niobate Single Crystal
DOI:10.1080/00150193.2011.635547  JN:FERROELECTRICS  PY:2011
  TC:11  AU: Li, Yang;Li, Jun;Zhou, Zhongxiang;Guo, Ruyan;Bhalla, Amar;
7:8:19:3     Thermal expansion behavior and polarization properties of lead-free ferroelectric potassium lithium tantalate niobate single crystals
DOI:10.1016/j.ceramint.2013.05.137  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Li, Yang;Li, Jun;Zhou, Zhongxiang;Guo, Ruyan;Bhalla, Amar;
7:8:19:4     Pyroelectric properties of lead-free ferroelectric niobium-rich potassium lithium tantalate niobate single crystals
DOI:10.1016/j.ceramint.2013.03.028  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Li, Jun;Li, Yang;Zhou, Zhongxiang;Guo, Ruyan;Bhalla, Amar;
7:8:19:5     Structure and dielectric properties of niobium-rich potassium lithium tantalate niobate single crystals
DOI:10.1016/j.ceramint.2013.03.067  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Li, Jun;Li, Yang;Zhou, Zhongxiang;Guo, Ruyan;Bhalla, Amar S.;
7:8:19:6     Orientation dependent electro-optic properties of K0.95Li0.05Ta0.41Nb0.59O3 single crystal: Experiment and simulation
DOI:10.1063/1.4867049  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Li, J.;Li, Y.;Zhou, Z. Z.;Guo, R. Y.;Bhalla, A. S.;
7:8:19:7     Thermal expansion behavior and estimated total polarizations of lead zirconate titanate-lead nickel niobate ceramics
DOI:10.1016/j.matlet.2010.06.020  JN:MATERIALS LETTERS  PY:2010
  TC:3  AU: Unruan, Muangjai;Prasatkhetragarn, Anurak;Laosiritaworn, Yongyut;Ananta, Supon;Khamman, Orawan;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar;
7:8:19:8     Piezoelectric and ferroelectric properties of lead-free niobium-rich potassium lithium tantalate niobate single crystals
DOI:10.1016/j.materresbull.2013.08.077  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:2  AU: Li, Jun;Li, Yang;Zhou, Zhongxiang;Guo, Ruyan;Bhalla, Amar S.;
7:8:19:9     Estimation of Total Polarization and Thermal Expansion Behavior in PZT-PCN Ceramics
DOI:10.1080/10584587.2011.616439  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:0  AU: Unruan, Muangjai;Prasatkhetragarn, Anurak;Yimnirun, Rattikorn;Guo, Ruyan;Bhalla, Amar;
7:8:19:10     Linear electrooptic coefficient r(51) of tetragonal potassium lithium tantalate niobate K0.95Li0.05Ta0.40Nb0.60O3 single crystal
DOI:10.1364/OME.3.002063  JN:OPTICAL MATERIALS EXPRESS  PY:2013
  TC:0  AU: Li, Jun;Li, Yang;Zhou, Zhongxiang;Bhalla, Amar;Guo, Ruyan;
7:8:20:1     Solution of the Bethe-Salpeter equation without empty electronic states: Application to the absorption spectra of bulk systems
DOI:10.1103/PhysRevB.85.045116  JN:PHYSICAL REVIEW B  PY:2012
  TC:10  AU: Rocca, Dario;Ping, Yuan;Gebauer, Ralph;Galli, Giulia;
7:8:20:2     First-principles study of excitonic effects in Raman intensities
DOI:10.1103/PhysRevB.88.094305  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Gillet, Yannick;Giantomassi, Matteo;Gonze, Xavier;
7:8:20:3     Ferroelectric and nonlinear optical properties of the LiNbO3-type ZnGeO3 from first-principles study
DOI:10.1016/j.jallcom.2011.11.017  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Zhang, J.;Xu, B.;Qin, Z.;Li, X. F.;Yao, K. L.;
7:8:20:4     Speeding up the solution of the Bethe-Salpeter equation by a double-grid method and Wannier interpolation
DOI:10.1103/PhysRevB.86.125203  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Kammerlander, David;Botti, Silvana;Marques, Miguel A. L.;Marini, Andrea;Attaccalite, Claudio;
7:8:20:5     First-principles characterization of the electronic and optical properties of hexagonal LiIO3
DOI:10.1016/j.optmat.2014.04.009  JN:OPTICAL MATERIALS  PY:2014
  TC:0  AU: Van Troeye, B.;Gillet, Y.;Ponce, S.;Gonze, X.;
7:8:20:6     Ab initio calculations of absorption spectra of semiconducting nanowires within many-body perturbation theory
DOI:10.1103/PhysRevB.85.035316  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Ping, Yuan;Rocca, Dario;Lu, Deyu;Galli, Giulia;
7:8:21:1     Effects of vanadium substitution on the electrical performance of amorphous SrBi2Ta2O9 thin-film capacitors
DOI:10.1016/j.scriptamat.2014.01.015  JN:SCRIPTA MATERIALIA  PY:2014
  TC:0  AU: Kang, Min-Gyu;Cho, Kwang-Hwan;Nahm, Sahn;Yoon, Seok-Jin;Kang, Chong-Yun;
7:8:21:2     Room-temperature pulsed laser deposition and dielectric properties of amorphous Bi3.95Er0.05Ti3O12 thin films on conductive substrates
DOI:10.1007/s00339-012-7326-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:1  AU: Mo, Zhong;Miao, Xinrui;Liang, Lirong;Deng, Wenli;Li, Baojun;Bao, Dinghua;
7:8:21:3     Room-temperature preparation and dielectric properties of amorphous Bi3.95Er0.05Ti3O12 thin films on flexible polyimide substrates via pulsed laser deposition method
DOI:10.1016/j.apsusc.2012.01.140  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:2  AU: Mo, Zhong;Wu, Guangheng;Bao, Dinghua;
7:8:21:4     Effect of bottom electrodes on dielectric properties of high frequency Ba0.5Sr0.5TiO3 parallel plate varactor
DOI:10.1016/j.tsf.2009.09.063  JN:THIN SOLID FILMS  PY:2010
  TC:5  AU: Sheng, Su;Zhang, Xiao-Yu;Wang, Peng;Ong, C. K.;
7:8:21:5     Structural and electrical properties of Bi2O3-Nb2O5 thin films grown at low temperatures by pulsed laser deposition
DOI:10.1016/j.actamat.2011.05.017  JN:ACTA MATERIALIA  PY:2011
  TC:3  AU: Sun, Jong-Woo;Kang, Lee-Seung;Kim, Jin-Seong;Joung, Mi-Ri;Nahm, Sahn;Seong, Tae-Geun;Kang, Chong-Yun;Kim, Jong-Hee;
7:8:22:1     Quasi-rapid thermal annealing studies on barium strontium titanate thin films deposited on fused silica substrates
DOI:10.1016/j.jallcom.2013.03.117  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:2  AU: Saravanan, K. Venkata;Raju, K. C. James;
7:8:22:2     Defect enhanced optic and electro-optic properties of lead zirconate titanate thin films
DOI:10.1063/1.3664137  JN:AIP ADVANCES  PY:2011
  TC:1  AU: Zhu, M. M.;Du, Z. H.;Ma, J.;
7:8:22:3     Improved electrical properties after post annealing of Ba0.7Sr0.3TiO3 thin films for MIM capacitor applications
DOI:10.1007/s00339-012-7107-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:4  AU: Rouahi, A.;Kahouli, A.;Sylvestre, A.;Jomni, F.;Defay, E.;Yangui, B.;
7:8:22:4     Thickness dependence of strain and in-plane dielectric properties of highly (001) oriented (Ba,Sr)TiO3 thin films
DOI:10.1016/j.tsf.2010.05.091  JN:THIN SOLID FILMS  PY:2010
  TC:5  AU: Lu, Shengbo;Xu, Zhenkui;Zhai, Jiwei;
7:8:22:5     Effects of oxygen plasma treatment on the dielectric properties of Ba0.7Sr0.3TiO3 thin films
DOI:10.1016/j.apsusc.2010.10.121  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:2  AU: Tan, Lefan;Xiong, Niandeng;
7:8:22:6     Preparation and Growth of Predominantly (100)-Oriented Ca0.4Sr0.6Bi4Ti4O15 Thin Film by Rapid Thermal Annealing
DOI:10.1111/j.1551-2916.2012.05160.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:0  AU: Fan, Suhua;Dong, Pengchao;Zhang, Fengqing;Chen, Yang;Wang, Yingying;
7:8:23:1     Microwave tunable dielectric properties of multilayer CNT membranes for smart applications
DOI:10.1007/s00339-012-6979-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:2  AU: Liu, L.;Yang, Z. H.;Kong, L. B.;Yin, W. Y.;Wang, S.;
7:8:23:2     Tunable dual-band ferrite-based metamaterials with dual negative refractions
DOI:10.1007/s00339-011-6638-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:18  AU: Huang, Y. J.;Wen, G. J.;Yang, Y. J.;Xie, K.;
7:8:23:3     Ferrite based metamaterials with thermo-tunable negative refractive index
DOI:10.1063/1.4823598  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Bi, Ke;Dong, Guoyan;Fu, Xiaojian;Zhou, Ji;
7:8:23:4     Effective electromagnetic properties of honeycomb substrate coated with dielectric or magnetic layer
DOI:10.1007/s00339-014-8458-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Liu, L.;Fan, C. Z.;Zhu, N. B.;Zhao, Z. Y.;Liu, R. P.;
7:8:23:5     Magnetic surface plasmon-induced tunable photonic bandgaps in two-dimensional magnetic photonic crystals
DOI:10.1007/s00339-011-6642-3  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2011
  TC:5  AU: Shen, Jian;Liu, Shiyang;Cao, Rong;Fan, Xin;Du, Junjie;Zhang, Huaiwu;Lin, Zhifang;Chui, Siu-Tat;Xiao, John Q.;
7:8:23:6     Tunable properties of microwire composites at microwave frequency
DOI:10.1007/s00339-012-7454-9  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Liu, L.;Rozanov, K. N.;Abshinova, M.;
7:8:24:1     Electric field-tunable BaxSr1-xTiO3 films with high figures of merit grown by molecular beam epitaxy
DOI:10.1063/1.4773034  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Mikheev, Evgeny;Kajdos, Adam P.;Hauser, Adam J.;Stemmer, Susanne;
7:8:24:2     Highly conducting SrMoO3 thin films for microwave applications
DOI:10.1063/1.4896339  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Radetinac, Aldin;Mani, Arzhang;Melnyk, Sergiy;Nikfalazar, Mohammad;Ziegler, Jurgen;Zheng, Yuliang;Jakoby, Rolf;Alff, Lambert;Komissinskiy, Philipp;
7:8:24:3     Epitaxially Stabilized EuMoO3: A New Itinerant Ferromagnet
DOI:10.1021/cm302231k  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:7  AU: Kozuka, Yusuke;Seki, Hidenobu;Fujita, Takahiro C.;Chakraverty, Suvankar;Yoshimatsu, Kohei;Kumigashira, Hiroshi;Oshima, Masaharu;Bahramy, Mohammad S.;Arita, Ryotaro;Kawasaki, Masashi;
7:8:24:4     Single-crystalline Sr2MoO4 films as prepared by pulsed laser deposition
DOI:10.1016/j.jcrysgro.2011.03.009  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:2  AU: Radetinac, A.;Takahashi, K. S.;Alff, L.;Kawasaki, M.;Tokura, Y.;
7:8:24:5     Charge-spin-coupled electrical transport properties in EuMoO3/SrTiO3 superlattices
DOI:10.1103/PhysRevB.87.205402  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Fujita, T. C.;Kozuka, Y.;Seki, H.;Kawasaki, M.;
7:8:25:1     Highly textured laser annealed Pb(Zr0.52Ti0.48)O-3 thin films
DOI:10.1063/1.3615295  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Bharadwaja, S. S. N.;Griggio, F.;Kulik, J.;Trolier-McKinstry, S.;
7:8:25:2     Large in-plane permittivity of Ba0.6Sr0.4TiO3 thin films crystallized using excimer laser annealing at 300 degrees C
DOI:10.1063/1.4770307  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Kang, Min-Gyu;Cho, Kwang-Hwan;Do, Young Ho;Lee, Young-Jin;Nahm, Sahn;Yoon, Seok-Jin;Kang, Chong-Yun;
7:8:25:3     Effect of Pt bottom electrode texture selection on the tetragonality and physical properties of Ba0.8Sr0.2TiO3 thin films produced by pulsed laser deposition
DOI:10.1063/1.4748288  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Silva, J. P. B.;Sekhar, K. C.;Almeida, A.;Moreira, J. Agostinho;Martin-Sanchez, J.;Pereira, M.;Khodorov, A.;Gomes, M. J. M.;
7:8:25:4     Influence of laser repetition rate on ferroelectric properties of pulsed laser deposited BaTiO3 films on platinized silicon substrate
DOI:10.1007/s00339-013-7948-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:0  AU: Silva, J. P. B.;Sekhar, K. C.;Almeida, A.;Agostinho Moreira, J.;Pereira, M.;Gomes, M. J. M.;
7:8:25:5     Ba0.8Sr0.2TiO3 films crystallized on glass and platinized substrates by laser-assisted annealing at room temperature
DOI:10.1007/s00339-013-8218-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:0  AU: Silva, J. P. B.;Khodorov, A.;Almeida, A.;Agostinho Moreira, J.;Pereira, M.;Gomes, M. J. M.;
7:8:25:6     Effects of oxygen partial pressure on the ferroelectric properties of pulsed laser deposited Ba0.8Sr0.2TiO3 thin films
DOI:10.1007/s00339-013-7602-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:3  AU: Silva, J. P. B.;Sekhar, K. C.;Almeida, A.;Agostinho Moreira, J.;Pereira, M.;Gomes, M. J. M.;
7:8:25:7     In situ laser annealing during growth of Pb(Zr0.52Ti0.48)O-3 thin films
DOI:10.1063/1.4816157  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Rajashekhar, Adarsh;Fox, Austin;Bharadwaja, S. S. N.;Trolier-McKinstry, Susan;
7:8:26:1     Enhanced leakage current performance and conduction mechanisms of Bi1.5Zn1.0Nb1.5O7/Ba0.5Sr0.5TiO3 bilayered thin films
DOI:10.1063/1.4757952  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:7  AU: Li, Ruguan;Jiang, Shuwen;Gao, Libin;Li, Yanrong;
7:8:26:2     Effect of thickness on the dielectric properties of bismuth magnesium niobium thin films deposited by rf magnetron sputtering
DOI:10.1016/j.ceramint.2014.04.042  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Li, Lingxia;Xu, Dan;Yu, Shihui;Dong, Helei;Jin, Yuxin;
7:8:26:3     Influence of Post Deposition Annealing Process on the Optical and Microwave Dielectric Properties of Bi1.5Zn1.0Nb1.5O7 Thin Films
DOI:10.1080/10584587.2010.490703  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:4  AU: Sudheendran, K.;Raju, K. C. James;
7:8:26:4     Characterization of lutetium oxide-based thin-film capacitors by impedance spectroscopy
DOI:10.1016/j.jnoncrysol.2009.09.041  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2010
  TC:2  AU: Wiktorczyk, Tadeusz;
7:8:26:5     Thickness-ratio-dependent dielectric properties of Bi1.5Zn1.0Nb1.5O7/Ba0.5Sr0.5TiO3 bilayered thin films
DOI:10.1016/j.mseb.2013.04.010  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2013
  TC:2  AU: Li, Ruguan;Jiang, Shuwen;Gao, Libin;Li, Yanrong;
7:8:26:6     The effect of thickness and temperature on dielectric properties of lutetium oxide thin films grown by electron-beam deposition on quartz
DOI:10.1016/j.tsf.2012.08.035  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Wiktorczyk, Tadeusz;
7:8:27:1     An observation of charge trapping phenomena in GaN/AlGaN/Gd2O3/Ni-Au structure
DOI:10.1063/1.3596382  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Chang, Liann Be;Das, Atanu;Lin, Ray Ming;Maikap, Siddheswar;Jeng, Ming Jer;Chou, Shu Tsun;
7:8:27:2     Investigation of temperature dependent threshold voltage variation of Gd2O3/AlGaN/GaN metal-oxide-semiconductor heterostructure
DOI:10.1063/1.4750481  JN:AIP ADVANCES  PY:2012
  TC:2  AU: Das, Atanu;Chang, Liann Be;Lin, Ray Ming;
7:8:27:3     Electron trap memory characteristics of LiNbO3 film/AlGaN/GaN heterostructure
DOI:10.1063/1.3294308  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:5  AU: Hao, L. Z.;Zhu, J.;Luo, W. B.;Zeng, H. Z.;Li, Y. R.;Zhang, Y.;
7:8:27:4     Physical and electrical characteristics of AlGaN/GaN metal-oxide-semiconductor high-electron-mobility transistors with rare earth Er2O3 as a gate dielectric
DOI:10.1016/j.tsf.2013.01.028  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Lin, Ray-Ming;Chu, Fu-Chuan;Das, Atanu;Liao, Sheng-Yu;Chou, Shu-Tsun;Chang, Liann-Be;
7:8:28:1     Characteristics of highly (001) oriented (K,Na)NbO3 films grown on LaNiO3 bottom electrodes by RF magnetron sputtering
DOI:10.1016/j.ceramint.2012.07.074  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:9  AU: Li, Tao;Wang, Genshui;Remiens, Denis;Dong, Xianlin;
7:8:28:2     Electrical properties of lead-free KNN films on SRO/STO by RF magnetron sputtering
DOI:10.1016/j.ceramint.2013.07.005  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Li, Tao;Wang, Genshui;Li, Kui;Du, Gang;Chen, Ying;Zhou, Zhiyong;Remiens, Denis;Dong, Xianlin;
7:8:28:3     Influence of LNO Top Electrodes on Electrical Properties of KNN/LNO Thin Films Prepared by RF Magnetron Sputtering
DOI:10.1111/jace.12047  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:5  AU: Li, Tao;Wang, Genshui;Li, Kui;Sama, Nossikpendou;Remiens, Denis;Dong, Xianlin;
7:8:29:1     Low-Dielectric-Loss Barium Strontium Titanate Thin Films with MgO Buffer Layer for Tunable Microwave Devices
DOI:10.1007/s11664-013-2673-1  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:5  AU: Bian, Yanlong;Wang, Hui;Zhai, Jiwei;
7:8:29:2     Low temperature dielectric characterization of Mg-doped SrTiO3 thin films prepared by sol-gel
DOI:10.1063/1.3360213  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Okhay, Olena;Wu, Aiying;Vilarinho, Paula M.;Tkach, Alexander;
7:8:29:3     Dielectric response of polycrystalline Sr1-1.5xBixTiO3 thin films under direct current bias
DOI:10.1063/1.3463472  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Okhay, Olena;Wu, Aiying;Vilarinho, Paula M.;Tkach, Alexander;
7:8:29:4     Magnetic Anomaly and Dielectric Tunability of (Sr,Mn)TiO3 Thin Films
DOI:10.1080/00150193.2012.672038  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Tkach, Alexander;Okhay, Olena;Wu, Aiying;Vilarinho, Paula M.;Bedanta, Subhankar;Shvartsman, Vladimir V.;Borisov, Pavel;
7:8:29:5     Comparison of Microwave Dielectric Properties of Ba0.6Sr0.4TiO3 Thin Films Grown on (100) LaAlO3 and (100) MgO Single-Crystal Substrates
DOI:10.1007/s11664-013-2489-z  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:3  AU: Wang, Hui;Bian, Yanlong;Shen, Bo;Zhai, Jiwei;
7:8:30:1     Dielectric tunability and electro-optic effect of Ba0.5Sr0.5TiO3 thin films
DOI:10.1063/1.3371679  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:9  AU: Takeda, K.;Muraishi, T.;Hoshina, T.;Takeda, H.;Tsurumi, T.;
7:8:30:2     Microstructure and dielectric properties of (Ba0.6Sr0.4)TiO3 thin films grown on super smooth glazed-Al2O3 ceramics substrate
DOI:10.1016/j.apsusc.2011.09.117  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:2  AU: Chen, Hongwei;Yang, Chuanren;Zheng, Shanxue;Zhang, Jihua;Zhang, Qiaozhen;Lei, Guanhuan;Lou, Feizhi;Yang, Lijun;
7:8:30:3     Improved Ferroelectric Phase Shifter by Inserting Spiral Inductors into Ground
DOI:10.1080/10584587.2011.621760  JN:INTEGRATED FERROELECTRICS  PY:2011
  TC:0  AU: Zhang, Jihua;Chen, Hongwei;Lei, Guanhuan;He, Wei;Liao, Yu;Zhang, Qiaozhen;Yang, Chuanren;
7:8:30:4     Enhanced leakage current properties of Ni-doped Ba0.6Sr0.4TiO3 thin films driven by modified band edge state
DOI:10.1063/1.3291124  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Seo, Hyungtak;Kim, Young-Bae;Lucovsky, Gerald;Kim, Il-Doo;Chung, Kwun-Bum;Kobayashi, Hikaru;Choi, Duck-Kyun;
7:8:31:1     Crystal structures, phase stability, and dielectric properties of (1-x) Bi3/2MgNb3/2O7-x Bi2Zn2/3Nb4/3O7 ceramics
DOI:10.1016/j.jallcom.2014.07.002  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Dong, H. L.;Li, L. X.;Jin, Y. X.;Yu, S. H.;Xu, D.;
7:8:31:2     The tolerance factors of the pyrochlore crystal structure
DOI:10.1039/c0jm03380d  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:10  AU: Cai, Lu;Arias, Alex L.;Nino, Juan C.;
7:8:31:3     Mechanism of dielectric nonlinear characteristics in bismuth-based cubic pyrochlores
DOI:10.1016/j.ceramint.2014.05.101  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Wang Wei;Ning Pingfan;Fang Jinglu;Wang Weixing;
7:8:31:4     Effect of excess Bi2O3 on structures and dielectric properties of Bi1.5Zn1.0Nb1.5O7 thin films deposited at room temperature by RF magnetron sputtering
DOI:10.1016/j.ceramint.2012.10.115  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Khan, M. Saeed;Ren, Wei;Shi, Peng;Chen, Xiaofeng;Wu, Xiaoqing;
7:8:32:1     Synthesis, crystal growth and mechanical properties of Bismuth Silicon Oxide (BSO) single crystal
DOI:10.1016/j.jallcom.2013.11.038  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Riscob, B.;Shkir, Mohd.;Ganesh, V.;Vijayan, N.;Maurya, K. K.;Rao, K. Kishan;Bhagavannarayana, G.;
7:8:32:2     Solubility and optical activity of Bi12SiO20 crystals
DOI:10.1016/j.jcrysgro.2012.01.010  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:2  AU: He, Xiaoling;Zhou, Haitao;Zhou, Weining;Hu, Zhanggui;Zhang, Changlong;Huo, Hande;Wang, Jinliang;Zuo, Yanbin;Lu, Fuhua;
7:8:32:3     Raman and optical spectroscopy characteristics of Se-doped Bi12SiO20 crystals
DOI:10.1016/j.optmat.2011.04.001  JN:OPTICAL MATERIALS  PY:2011
  TC:2  AU: Milenov, T. I.;Rafailov, P. M.;Thomsen, C.;Egorysheva, A.;Titorenkova, R.;Kostova, B.;Skorikov, V.;
7:8:32:4     Effect of SiO2 on Bi12SiO20 crystals grown by hydrothermal technology
DOI:10.1016/j.jcrysgro.2010.10.185  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:3  AU: He, Xiaoling;Zhou, Weining;Zhang, Changlong;Zhou, Haitao;Hu, Zhanggui;Huo, Hande;Zuo, Yanbin;Lu, Fuhua;Wang, Jinliang;Qin, Shijie;Li, Dongping;Zhang, Haixia;Chen, Yixin;
7:8:33:1     Relaxor-like Dielectric Behavior in Stoichiometric Sillenite Bi12SiO20
DOI:10.1021/cm3031363  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:2  AU: Hu, Yu;Sinclair, Derek C.;
7:8:33:2     Ba2Bi1.4Nb0.6O6: A Nonferroelectric, High Permittivity Oxide
DOI:10.1021/cm301013v  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:2  AU: Tan, Chaou C.;Feteira, Antonio;Sinclair, Derek C.;
7:9:1:1     Chemistry and applications of oxynitride perovskites
DOI:10.1039/c2jm13182j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:37  AU: Fuertes, Amparo;
7:9:1:2     Sinterability of the oxynitride LaTiO2N with perovskite-type structure
DOI:10.1016/j.jallcom.2013.10.071  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:4  AU: Li, Duan;Li, Wenjie;Fasel, Claudia;Shen, James;Riedel, Ralf;
7:9:1:3     Electronic Tuning of Two Metals and Colossal Magnetoresistances in EuWO1+xN2-x Perovskites
DOI:10.1021/ja910745b  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2010
  TC:22  AU: Yang, Minghui;Oro-Sole, Judith;Kusmartseva, Anna;Fuertes, Amparo;Attfield, J. Paul;
7:9:1:4     First-Principles Study on Relaxor-Type Ferroelectric Behavior without Chemical Inhomogeneity in BaTaO2N and SrTaO2N
DOI:10.1021/cm302335q  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:14  AU: Hinuma, Yoyo;Moriwake, Hiroki;Zhang, Ya-Ru;Motohash, Teruki;Kikkawa, Shinichi;Tanaka, Isao;
7:9:1:5     Sintering and dielectric properties of perovskite SrTaO2N ceramics
DOI:10.1016/j.jeurceramsoc.2011.12.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:20  AU: Zhang, Ya-Ru;Motohashi, Teruki;Masubuchi, Yuji;Kikkawa, Shinichi;
7:9:1:6     Electronic Structure of Tantalum Oxynitride Perovskite Photocatalysts
DOI:10.1021/cm401815w  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:14  AU: Balaz, Snjezana;Porter, Spencer H.;Woodward, Patrick M.;Brinson, Leonard J.;
7:9:1:7     Growth of (Sr,La)-(Ta,Ti)-O-N perovskite oxide and oxynitride films by radio frequency magnetron sputtering: Influence of the reactive atmosphere on the film structure
DOI:10.1016/j.jcrysgro.2014.12.001  JN:JOURNAL OF CRYSTAL GROWTH  PY:2015
  TC:0  AU: Le Paven, C.;Le Gendre, L.;Benzerga, R.;Chevire, F.;Tessier, F.;Jacq, S.;Traore-Mantion, S.;Sharaiha, A.;
7:9:1:8     Synthesis and crystal structure of K2NiF4-type novel Gd1+xCa1-xAlO4-xNx oxynitrides
DOI:10.1016/j.jallcom.2013.08.140  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Masubuchi, Yuji;Hata, Tomoyuki;Motohashi, Teruki;Kikkawa, Shinichi;
7:9:1:9     Thermally Robust Anion-Chain Order in Oxynitride Perovskites
DOI:10.1021/cm4037132  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:6  AU: Clark, Lucy;Oro-Sole, Judith;Knight, Kevin S.;Fuertes, Amparo;Attfield, J. Paul;
7:9:1:10     Additive Sintering, Postannealing, and Dielectric Properties of SrTaO2N
DOI:10.1111/jace.12806  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Sun, Shi-Kuan;Zhang, Ya-Ru;Masubuchi, Yuji;Motohashi, Teruki;Kikkawa, Shinichi;
7:9:1:11     Hot isostatic press sintering and dielectric properties of SrTaO2N ceramics
DOI:10.1016/j.ceramint.2012.08.063  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Zhang, Y-R.;Masubuchi, Y.;Motohashi, T.;Kikkawa, S.;Hirota, K.;
7:9:1:12     Direct synthesis of SrTaO2N from SrCO3/Ta3N5 involving CO evolution
DOI:10.1016/j.jeurceramsoc.2014.07.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Sun, Shi-Kuan;Motohashi, Teruki;Masubuchi, Yuji;Kikkawa, Shinichi;
7:9:1:13     Subextensive Entropies and Open Order in Perovskite Oxynitrides
DOI:10.1021/ja300847m  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:6  AU: Camp, Philip J.;Fuertes, Amparo;Attfield, J. Paul;
7:9:1:14     A novel LaFeO3-XNX oxynitride. Synthesis and characterization
DOI:10.1016/j.jallcom.2012.09.042  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:6  AU: Sierra Gallego, G.;Marin Alzate, N.;Arnache, O.;
7:9:1:15     High-Mobility Electron Conduction in Oxynitride: Anatase TaON
DOI:10.1021/cm402720d  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:8  AU: Suzuki, Atsushi;Hirose, Yasushi;Oka, Daichi;Nakao, Shoichiro;Fukumura, Tomoteru;Ishii, Satoshi;Sasa, Kimikazu;Matsuzaki, Hiroyuki;Hasegawa, Tetsuya;
7:9:1:16     Can we predict the formability of perovskite oxynitrides from tolerance and octahedral factors?
DOI:10.1039/c3ta10216e  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2013
  TC:7  AU: Li, Wenjie;Ionescu, Emanuel;Riedel, Ralf;Gurlo, Aleksander;
7:9:1:17     Morphology and band gap variations of oxynitride LaTaON2 depending on the ammonolysis temperature and precursor
DOI:10.1007/s10853-012-6420-4  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:8  AU: Park, Na-Young;Kim, Young-Il;
7:9:1:18     Characterization of Nd2AlO3N and Sm2AlO3N oxynitrides synthesized by carbothermal reduction and nitridation
DOI:10.1016/j.jallcom.2011.02.138  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Chevire, Francois;Pallu, Arthur;Ray, Erwan;Tessier, Franck;
7:9:1:19     Effects of KC1 flux on the morphology, anion composition, and chromaticity of perovskite oxynitrides, CaTaO2N, SrTaO2N, and LaTaON2
DOI:10.1016/j.ceramint.2013.10.100  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:6  AU: Kim, Young-Il;
7:9:1:20     Oxygen transport and isotopic exchange in iron oxide/YSZ thermochemically-active materials via splitting of C(O-18)(2) at high temperature studied by thermogravimetric analysis and secondary ion mass spectrometry
DOI:10.1039/c2jm15324f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:21  AU: Coker, Eric N.;Ohlhausen, James A.;Ambrosini, Andrea;Miller, James E.;
7:9:1:21     Stress stabilization of a new ferroelectric phase incorporated into SrTaO2N thin films
DOI:10.1063/1.4891981  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhu, Wenliang;Kamisaka, Hideyuki;Oka, Daichi;Hirose, Yasushi;Leto, Andrea;Hasegawa, Tetsuya;Pezzotti, Giuseppe;
7:9:1:22     New luminescent rare earth activated oxynitridosilicates and oxynitridogermanates with the apatite structure
DOI:10.1039/c2jm35168d  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:5  AU: Thomas, Sebastien;Oro-Sole, Judith;Glorieux, Benoit;Jubera, Veronique;Buissette, Valerie;Le Mercier, Thierry;Garcia, Alain;Fuertes, Amparo;
7:9:1:23     Synthesis, anion order and magnetic properties of RVO3-xNx perovskites (R = La, Pr, Nd; 0 <= x <= 1)
DOI:10.1039/c3tc32362e  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2014
  TC:3  AU: Oro-Sole, Judith;Clark, Lucy;Kumar, Nitesh;Bonin, William;Sundaresan, A.;Attfield, J. Paul;Rao, C. N. R.;Fuertes, Amparo;
7:9:1:24     Rare earth niobium oxynitrides, LnNbON(2-delta) (Ln = Y, La, Pr, Nd, Gd, Dy): Synthesis, structure and properties
DOI:10.1016/j.materresbull.2011.07.009  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:5  AU: Kumar, Nitesh;Sundaresan, A.;Rao, C. N. R.;
7:9:1:25     Enhanced leakage current behavior of Sr2Ta2O7-x/SrTiO3 bilayer dielectrics for metal-insulator-metal capacitors
DOI:10.1016/j.tsf.2011.01.001  JN:THIN SOLID FILMS  PY:2011
  TC:2  AU: Kaynak, C. Baristiran;Lukosius, M.;Costina, I.;Tillack, B.;Wenger, Ch.;Ruhl, G.;Blomberg, T.;
7:9:2:1     Magnetic and optical investigations on LaFeO3 powders with different particle sizes and corresponding ceramics
DOI:10.1016/j.ssi.2013.07.001  JN:SOLID STATE IONICS  PY:2013
  TC:9  AU: Koeferstein, Roberto;Jaeger, Lothar;Ebbinghaus, Stefan G.;
7:9:2:2     Synthesis and characterization of nano-LaFeO3 powders by a soft-chemistry method and corresponding ceramics
DOI:10.1016/j.ssi.2012.10.017  JN:SOLID STATE IONICS  PY:2013
  TC:10  AU: Koeferstein, Roberto;Ebbinghaus, Stefan G.;
7:9:2:3     Pure phase LaFeO3 perovskite with improved surface area synthesized using different routes and its characterization
DOI:10.1016/j.matchemphys.2009.09.005  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:35  AU: Gosavi, Priti V.;Biniwale, Rajesh B.;
7:9:2:4     Lanthanum ferrite ferromagnetic nanocrystallites by a polymeric precursor route
DOI:10.1016/j.jallcom.2010.12.162  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:15  AU: Popa, Monica;Moreno, Jose M. Calderon;
7:9:2:5     Synthesis, characterization, and property studies of (La, Ag) FeO3 (0.0 <= x <= 0.3) perovskites
DOI:10.1016/j.jallcom.2009.08.059  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:19  AU: Bellakki, Manjunath B.;Kelly, Brandon J.;Manivannan, V.;
7:9:2:6     Polymetallic citric complexes as precursors for spray-pyrolysis deposition of thin LaFeO3 films
DOI:10.1016/j.tsf.2014.03.036  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Milanova, M.;Zaharieva, J.;Todorovska, R.;Todorovsky, D.;
7:9:2:7     A unique and facile preparation of lanthanum ferrite nanoparticles in emulsion nanoreactors: Morphology, structure, and efficient photocatalysis
DOI:10.1016/j.mssp.2014.01.017  JN:MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING  PY:2014
  TC:7  AU: Abazari, Reza;Sanati, Soheila;Saghatforoush, Lotf Ali;
7:9:2:8     Synthesis and anomalous magnetic properties of LaFeO3 nanoparticles by hot soap method
DOI:10.1016/j.matchemphys.2011.05.015  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:6  AU: Fujii, Tatsuo;Matsusue, Ikkoh;Nakatsuka, Daisuke;Nakanishi, Makoto;Takada, Jun;
7:9:2:9     Synthesis of nanocrystalline LaFeO3 powders via glucose sol-gel route
DOI:10.1016/j.matchemphys.2011.05.054  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:14  AU: Liu, Ting;Xu, Yebin;
7:9:2:10     Nano-LaFeO3 powder preparation by calcining an emulsion precursor
DOI:10.1016/j.matchemphys.2010.03.039  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:15  AU: Chandradass, J.;Kim, Ki Hyeon;
7:9:2:11     Conduction and magnetization improvement of BiFeO3 multiferroic nanoparticles by Ag+ doping
DOI:10.1016/j.materresbull.2013.09.011  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:3  AU: Ahmed, M. A.;Mansour, S. F.;El-Dek, S. I.;Abu-Abdeen, M.;
7:9:2:12     Controlled synthesis of La1-xSrxCrO3 nanoparticles by hydrothermal method with nonionic surfactant and their ORR activity in alkaline medium
DOI:10.1016/j.materresbull.2013.04.084  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:2  AU: Choi, Bo Hyun;Park, Shin-Ae;Park, Bong Kyu;Chun, Ho Hwan;Kim, Yong-Tae;
7:9:3:1     Synthesis and photocatalytic properties of LaMnO3-graphene nanocomposites
DOI:10.1016/j.jallcom.2013.09.030  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:5  AU: Hu, Jie;Ma, Jiahua;Wang, Lina;Huang, Hao;
7:9:3:2     Preparation of Ca-doped LaFeO3 nanopowders in a reverse microemulsion and their visible light photocatalytic activity
DOI:10.1016/j.matlet.2009.10.048  JN:MATERIALS LETTERS  PY:2010
  TC:33  AU: Li, Fa-tang;Liu, Ying;Liu, Rui-hong;Sun, Zhi-min;Zhao, Di-shun;Kou, Cheng-guang;
7:9:3:3     Preparation, characterization and photocatalytic activity of Co-doped LaMnO3/graphene composites
DOI:10.1016/j.powtec.2014.01.071  JN:POWDER TECHNOLOGY  PY:2014
  TC:2  AU: Hu, Jie;Ma, Jiahua;Wang, Lina;Huang, Hao;Ma, Luwei;
7:9:3:4     Preparation, characterization and photocatalytic properties of terbium orthoferrite nanopowder
DOI:10.1016/j.apt.2012.06.009  JN:ADVANCED POWDER TECHNOLOGY  PY:2013
  TC:15  AU: Yang, H.;Zhang, J. X.;Lin, G. J.;Xian, T.;Jiang, J. L.;
7:9:3:5     Preparation of La1-xSrxMnO3/graphene thin films and their photocatalytic activity
DOI:10.1016/j.mseb.2013.11.005  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2014
  TC:2  AU: Hu, Jie;Ma, Jiahua;Wang, Lina;Huang, Hao;
7:9:3:6     Hydrothermal preparation, characterization and enhanced properties of reduced graphene-BiFeO3 nanocomposite
DOI:10.1016/j.matlet.2012.09.045  JN:MATERIALS LETTERS  PY:2013
  TC:8  AU: Li, Tie;Shen, Jianfeng;Li, Na;Ye, Mingxin;
7:9:3:7     Emergence of ferromagnetism and Jahn-Teller distortion in LaMn1-xCrxO3 (x < 0.15)
DOI:10.1103/PhysRevB.87.220404  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Ramos, Aline Y.;Tolentino, Helio C. N.;Soares, Marcio M.;Grenier, Stephane;Bunau, Oana;Joly, Yves;Baudelet, Francois;Wilhelm, Fabrice;Rogalev, Andrei;Souza, Raquel A.;Souza-Neto, Narcizo M.;Proux, Olivier;Testemale, Denis;Caneiro, Alberto;
7:9:3:8     Single-step synthesis of nano-sized perovskite-type oxide/carbon nanotube composites and their electrocatalytic oxygen-reduction activities
DOI:10.1039/c0jm02600j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:16  AU: Miyazaki, Kohei;Kawakita, Ken-ichi;Abe, Takeshi;Fukutsuka, Tomokazu;Kojima, Kazuo;Ogumi, Zempachi;
7:9:3:9     Reduction of critical field for magnetic and orbital-ordering phase transition in impurity-substituted Nd0.45Sr0.55MnO3 crystal
DOI:10.1063/1.4866050  JN:APL MATERIALS  PY:2014
  TC:0  AU: Izuchi, Y.;Akaki, M.;Akahoshi, D.;Kuwahara, H.;
7:9:3:10     Universal effect of Mn-site doping on charge ordering in La1/3Ca2/3MnO3
DOI:10.1016/j.jmmm.2013.04.061  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:3  AU: Orlova, T. S.;Laval, J. Y.;Monod, Ph.;Noudem, J. G.;Greshnov, A. A.;
7:9:3:11     Element-specific and bulk magnetism, electronic, and crystal structures of La0.70Ca0.30Mn1-xCrxO3
DOI:10.1103/PhysRevB.85.104401  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Terashita, H.;Cezar, J. C.;Ardito, F. M.;Bufaical, L. F.;Granado, E.;
7:9:3:12     Structure, Dye Degradation Activity and Stability of Oxygen Defective BaFeO3-x
DOI:10.2320/matertrans.M2010206  JN:MATERIALS TRANSACTIONS  PY:2010
  TC:3  AU: Sun, Mengmeng;Jiang, Yinshan;Li, Fangfei;Xia, Maosheng;Xue, Bing;Liu, Darui;
7:9:3:13     Effect of oxygen vacancy variation on the photo-assisted degradation and structural phase transition of oxygen defective Ba(Fe,Co)O3-x
DOI:10.1016/j.materresbull.2011.02.036  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:2  AU: Sun, Mengmeng;Jiang, Yinshan;Li, Fangfei;Xia, Maosheng;Xue, Bing;Liu, Darui;
7:9:4:1     Fabrication of unique ribbon-like porous LaFeO3 nanofibers photocatalyst via electrospinning
DOI:10.1007/s00339-014-8559-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Li, Shudan;He, Zhixiao;Wang, Xianlei;Gao, Kun;
7:9:4:2     Preparation of stable cubic LaFeO3 nanoparticles using carbon nanotubes as templates
DOI:10.1039/c3ta10828g  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2013
  TC:5  AU: Mihai, Oana;Raaen, Steinar;Chen, De;Holmen, Anders;
7:9:4:3     Facile preparation of porous LaFeO3 nanomaterial by self-combustion of ionic liquids
DOI:10.1016/j.matlet.2010.10.049  JN:MATERIALS LETTERS  PY:2011
  TC:17  AU: Li, Fa-tang;Liu, Ying;Sun, Zhi-min;Liu, Rui-hong;Kou, Cheng-guang;Zhao, Ye;Zhao, Di-shun;
7:9:4:4     Photocatalytic hydrogen generation through water splitting on nano-crystalline LaFeO3 perovskite
DOI:10.1016/j.ijhydene.2012.01.120  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2012
  TC:26  AU: Tijare, Saumitra N.;Joshi, Meenal V.;Padole, Priyanka S.;Mangrulkar, Priti A.;Rayalu, Sadhana S.;Labhsetwar, Nitin K.;
7:9:4:5     Structural and electrical properties of calcium substituted lanthanum ferrite powders
DOI:10.1016/j.powtec.2012.07.026  JN:POWDER TECHNOLOGY  PY:2012
  TC:9  AU: Andoulsi, Refka;Horchani-Naifer, Karima;Ferid, Mokhtar;
7:9:4:6     LaFeO3-based nanopowders prepared by a soft-hard templating approach: the effect of silica texture
DOI:10.1039/c3ta15382g  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:0  AU: Deganello, Francesca;Testa, Maria Luisa;La Parola, Valeria;Longo, Alessandro;Tavares, Ana C.;
7:9:4:7     Electrical conductivity of La1-x,Ca-x,FeO3-delta solid solutions
DOI:10.1016/j.ceramint.2013.01.085  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Andoulsi, Refka;Horchani-Naifer, Karima;Ferid, Mokhtar;
7:9:4:8     Synthesis of ultrafine lanthanum ferrite (LaFeO3) fibers via electrospinning
DOI:10.1016/j.matlet.2010.06.005  JN:MATERIALS LETTERS  PY:2010
  TC:16  AU: Leng, Jing;Li, Shuang;Wang, Zhongshan;Xue, Yanfeng;Xu, Dapeng;
7:9:4:9     Synthesis and optimization of barium manganate nanofibers by electrospinning
DOI:10.1016/j.ceramint.2011.09.026  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:7  AU: Hayat, Khizar;Rafiq, M. A.;Hasan, M. M.;
7:9:4:10     A simple and efficient preparation of LaFeO3 nanopowders by glycine-nitrate process: Effect of glycine concentration
DOI:10.1016/j.ceramint.2011.07.026  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:10  AU: Kondakindi, Rajender R.;Karan, Kunal;Peppley, Brant A.;
7:9:4:11     A novel doped CeO2-LaFeO3 composite oxide as both anode and cathode for solid oxide fuel cells
DOI:10.1016/j.ijhydene.2012.06.064  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2012
  TC:3  AU: Liu, Limin;Sun, Kening;Li, Xiaokun;Zhang, Ming;Liu, Yibo;Zhang, Naiqing;Zhou, Xiaoliang;
7:9:4:12     Oxygen nonstoichiometry and defect chemistry of the mixed conductor La0.9Ca0.1FeO3-delta at low oxygen partial pressure
DOI:10.1016/j.ssi.2013.08.039  JN:SOLID STATE IONICS  PY:2013
  TC:3  AU: Geary, Tim C.;Adler, Stuart B.;
7:9:5:1     Microwave-assisted synthesis of perovskite ReFeO3 (Re: La, Sm, Eu, Gd) photocatalyst
DOI:10.1016/j.mseb.2010.03.050  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:44  AU: Ding, Jianlin;Lue, Xiaomeng;Shu, Huoming;Xie, Jimin;Zhang, Hui;
7:9:5:2     Controllable synthesis of hexagonal and orthorhombic YFeO3 and their visible-light photocatalytic activities
DOI:10.1016/j.matlet.2012.04.080  JN:MATERIALS LETTERS  PY:2012
  TC:18  AU: Zhang, Yuewei;Yang, Jingxia;Xu, Jianfeng;Gao, Qiuyue;Hong, Zhanglian;
7:9:5:3     Synergistic photocatalytic activity of LnFeO(3) (Ln = Pr, Y) perovskites under visible-light illumination
DOI:10.1016/j.ceramint.2014.05.097  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Li, Li;Zhang, Min;Tian, Peng;Gu, Wen;Wang, Xiong;
7:9:5:4     Enhanced visible light-responsive photocatalytic activity of LnFeO(3) (Ln = La, Sm) nanoparticles by synergistic catalysis
DOI:10.1016/j.materresbull.2013.10.027  JN:MATERIALS RESEARCH BULLETIN  PY:2014
  TC:5  AU: Li, Li;Wang, Xiong;Zhang, Yange;
7:9:5:5     Synthesis of GdFeO3 microspheres assembled by nanoparticles as magnetically recoverable and visible-light-driven photocatalysts
DOI:10.1016/j.matlet.2012.08.140  JN:MATERIALS LETTERS  PY:2012
  TC:5  AU: Li, Xun;Duan, Zeng-Qiang;
7:9:5:6     n-La2Ti2O7/p-LaCrO3: a novel heterojunction based composite photocatalyst with enhanced photoactivity towards hydrogen production
DOI:10.1039/c4ta02401j  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2014
  TC:2  AU: Nashim, Amtul;Parida, Kulamani;
7:9:5:7     Solvothermal Synthesis and Visible-Light Driven Photocatalytic Properties of YFeO3 Nanoparticles
DOI:10.1080/10584587.2014.899876  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Zhang, Yuewei;Feng, Jingyao;Xu, Jianfeng;Chen, Guanqin;Hong, Zhanglian;
7:9:5:8     Preparation of Nanocrystalline GdFeO3 by Microwave Method and Its Visible-light Photocatalytic Activity
DOI:10.1080/10584587.2014.902720  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Tang, Peisong;Hu, Yingying;Lin, Tingting;Jiang, Zhen;Tang, Chaowan;
7:9:5:9     Template-free solvothermal synthesis of ZnO nanoparticles with controllable size and their size-dependent optical properties
DOI:10.1016/j.matlet.2011.09.007  JN:MATERIALS LETTERS  PY:2012
  TC:14  AU: Lian, Jiabiao;Liang, Yao;Kwong, Fung-luen;Ding, Zhimin;Ng, Dickon H. L.;
7:9:5:10     Sol-gel Synthesis and Photoluminescence Characterization of Ba2SiO4:Eu2+ Green Phosphors for White-LED Application
DOI:10.1080/10584587.2014.904192  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:1  AU: Zhang, Yuewei;Feng, Jingyao;Sai, Qinglin;Ma, Mengjia;Yang, Jingxia;Liu, Yi;
7:9:5:11     Low temperature crystallization of yttrium orthoferrite by organic acid-assisted sol-gel synthesis
DOI:10.1016/j.matlet.2013.09.108  JN:MATERIALS LETTERS  PY:2014
  TC:3  AU: Stevens, Frederic;Cloots, Rudi;Poelman, Dirk;Vertruyen, Benedicte;Henrist, Catherine;
7:9:6:1     Evidence for Strain-Induced Ferroelectric Order in Epitaxial Thin-Film KTaO3
DOI:10.1103/PhysRevLett.104.227601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:19  AU: Tyunina, M.;Narkilahti, J.;Plekh, M.;Oja, R.;Nieminen, R. M.;Dejneka, A.;Trepakov, V.;
7:9:6:2     Lattice dynamics and broad-band dielectric properties of the KTaO3 ceramics
DOI:10.1063/1.4714545  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Glinsek, Sebastjan;Nuzhnyy, Dmitry;Petzelt, Jan;Malic, Barbara;Kamba, Stanislav;Bovtun, Viktor;Kempa, Martin;Skoromets, Volodymyr;Kuzel, Petr;Gregora, Ivan;Kosec, Marija;
7:9:6:3     Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy
DOI:10.1063/1.3624710  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Skoromets, V.;Glinsek, S.;Bovtun, V.;Kempa, M.;Petzelt, J.;Kamba, S.;Malic, B.;Kosec, M.;Kuzel, P.;
7:9:6:4     Ferromagnetic-nonmagnetic and metal-insulator phase transitions at the interfaces of KTaO3 and PbTiO3
DOI:10.1063/1.4898738  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yang, Yi;Lin, Chen-Sheng;Chen, Jin-Feng;Hu, Lei;Cheng, Wen-Dan;
7:9:6:5     Tuning of dielectric properties of SrTiO3 in the terahertz range
DOI:10.1103/PhysRevB.84.174121  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Skoromets, V.;Kadlec, F.;Kadlec, C.;Nemec, H.;Rychetsky, I.;Panaitov, G.;Mueller, V.;Fattakhova-Rohlfing, D.;Moch, P.;Kuzel, P.;
7:9:6:6     Systematic study of terahertz response of SrTiO3 based heterostructures: Influence of strain, temperature, and electric field
DOI:10.1103/PhysRevB.89.214116  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Skoromets, V.;Kadlec, C.;Drahokoupil, J.;Schubert, J.;Hlinka, J.;Kuzel, P.;
7:9:6:7     Modulation of dielectric properties of KTaO3 in terahertz region via 532nm continuous-wave laser
DOI:10.1364/OME.4.002595  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:0  AU: Wu, L.;Li, H.;Jiang, L.;Ding, C.;Sheng, Q.;Ding, X.;Yao, J.;
7:9:6:8     Induced polarized state in intentionally grown oxygen deficient KTaO3 thin films
DOI:10.1063/1.4813324  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Mota, D. A.;Romaguera-Barcelay, Y.;Tkach, A.;Perez de la Cruz, J.;Vilarinho, P. M.;Tavares, P. B.;Agostinho Moreira, J.;Almeida, A.;
7:9:6:9     Terahertz Time-Domain Spectroscopy of 0.73Pb(Mg1/3Nb2/3)O3-0.27PbTiO3 Single Crystal
DOI:10.1111/jace.12958  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Yong, Zehui;He, Lianxing;Li, Bo;Hu, Mingzhe;Lam, Chi Hang;Wang, Yu;
7:9:6:10     Dielectric properties of NaNbO3: SrTiO3 interface nanolayer
DOI:10.1063/1.3527900  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Tyunina, M.;Oja, R.;Plekh, M.;Nieminen, R. M.;
7:9:6:11     Strontium titanate/silicon-based terahertz photonic crystal multilayer stack
DOI:10.1007/s00339-011-6743-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:1  AU: Xin, J. Z.;Jim, K. L.;Yang, J.;Gong, X. J.;Chen, L. Q.;Gao, F.;Tsang, Y. H.;Chan, H. L. W.;Leung, C. W.;
7:9:6:12     Structural, elastic, electronic and thermodynamic properties of KTaO3 and NaTaO3: Ab initio investigations
DOI:10.1016/j.commatsci.2013.03.030  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2013
  TC:6  AU: Bouafia, H.;Hiadsi, S.;Abidri, B.;Akriche, A.;Ghalouci, L.;Sahli, B.;
7:9:6:13     Tackling Polar Response in Oxygen Deficient KTaO3 Thin Films
DOI:10.1080/00150193.2014.893804  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Mota, D. A.;Romaguera-Barcelay, Y.;Tkach, A.;Perez de la Cruz, J.;Vilarinho, P. M.;Tavares, P. B.;Agostinho Moreira, J.;Almeida, A.;
7:9:7:1     Nanocrystalline LaFeO3 preparation and thermal process of precursor
DOI:10.1016/j.apt.2012.08.009  JN:ADVANCED POWDER TECHNOLOGY  PY:2013
  TC:7  AU: Zhou Kaiwen;Wu Xuehang;Wu Wenwei;Xie Jun;Tang Siqi;Liao Sen;
7:9:7:2     Synthesis of perovskite LaCoO3 by thermal decomposition of oxalates: Phase evolution and kinetics of the thermal transformation of the precursor
DOI:10.1016/j.ceramint.2013.11.048  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:5  AU: Wang Kaituo;Wu Xuehang;Wu Wenwei;Li Yongni;Liao Sen;
7:9:7:3     Nanocrystalline Nd2O3: Preparation, phase evolution, and kinetics of thermal decomposition of precursor
DOI:10.1016/j.ceramint.2013.10.007  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:4  AU: Qin Liqin;Wang Kaituo;Wu Xuehang;Wu Wenwei;Liao Sen;Li Gengming;
7:9:7:4     A simple method to prepare indium oxide nanoparticles: Structural, microstructural and magnetic properties
DOI:10.1016/j.apt.2010.05.006  JN:ADVANCED POWDER TECHNOLOGY  PY:2011
  TC:19  AU: Chandradass, J.;Bae, Dong Sik;Kim, Ki Hyeon;
7:9:7:5     Nanocrystalline LaMnO3 preparation and kinetics of crystallization process
DOI:10.1016/j.apt.2012.04.004  JN:ADVANCED POWDER TECHNOLOGY  PY:2013
  TC:7  AU: Wu Wenwei;Cai Jinchao;Wu Xuehang;Liao Sen;Wang Kaituo;Tao Lin;
7:9:7:6     Characterization by Fourier transform infrared spectroscopy of hydroxyapatite co-doped with zinc and fluoride
DOI:10.1016/j.ceramint.2013.03.029  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:11  AU: Uysal, I.;Severcan, F.;Evis, Z.;
7:9:7:7     LaCoO3 ceramics obtained from reactive powders
DOI:10.1016/j.ceramint.2012.03.054  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Predoana, L.;Malic, B.;Crisan, D.;Dragan, N.;Anastasescu, M.;Calderon-Moreno, J.;Scurtu, R.;Zaharescu, M.;
7:9:7:8     Controlled synthesis of Nd(OH)(3) and Nd2O3 nanoparticles by microemulsion method
DOI:10.1016/j.matchemphys.2010.03.004  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:8  AU: Zhu, Wenqing;Ma, Jin;Xu, Lei;Zhang, Wenzhao;Chen, Yashao;
7:9:7:9     Effect of process parameters on electrochemical properties of mechanically prepared composite powders for solid oxide fuel cells
DOI:10.1016/j.apt.2010.08.004  JN:ADVANCED POWDER TECHNOLOGY  PY:2011
  TC:1  AU: Hobara, Natsuro;Takizawa, Koichi;Hagiwara, Akifusa;Sato, Kazuyoshi;Abe, Hiroya;Naito, Makio;
7:9:7:10     Study of the Gelling Process in the La-Co-Citric Acid System
DOI:10.1111/j.1551-2916.2011.04965.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Predoana, Luminita;Jitianu, Andrei;Malic, Barbara;Zaharescu, Maria;
7:9:7:11     Template-free synthesis of neodymium hydroxide nanorods by microwave-assisted hydrothermal process, and of neodymium oxide nanorods by thermal decomposition
DOI:10.1016/j.ceramint.2012.01.065  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:3  AU: Phuruangrat, Anukorn;Thongtem, Somchai;Thongtem, Titipun;
7:9:8:1     The influence of the additive BaGeO3 on BaSnO3 ceramics
DOI:10.1016/j.jeurceramsoc.2009.12.015  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:8  AU: Koeferstein, Roberto;Jaeger, Lothar;Zenkner, Mandy;Mueller, Thomas;Ebbinghaus, Stefan G.;
7:9:8:2     Phase transition and dielectric properties of BaTiO3 ceramics containing 10 mol% BaGeO3
DOI:10.1016/j.matchemphys.2009.08.026  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:11  AU: Koeferstein, Roberto;Jaeger, Lothar;Zenkner, Mandy;Ebbinghaus, Stefan G.;
7:9:8:3     Influence of ZnO additive on the properties of Y-doped BaSnO3 proton conductor
DOI:10.1016/j.mseb.2011.06.009  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2011
  TC:7  AU: Wang, Yanzhong;Chesnaud, Anthony;Bevillon, Emile;Yang, Jinlong;Dezanneau, Guilhem;
7:9:8:4     Semiconducting properties of Ge-doped BaSnO3 ceramic
DOI:10.1016/j.jallcom.2010.07.041  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:4  AU: Koferstein, Roberto;Yakuphanoglu, Fahrettin;
7:9:8:5     BaSnO3 based thermally stable capacitors
DOI:10.1016/j.jallcom.2012.07.072  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:3  AU: Bucur, Raul Alin;Bucur, Alexandra Ioana;Novaconi, Stefan;Nicoara, Irina;
7:9:8:6     The influence of BaGeO3 on the properties of Ba(Ti1-x Sn (x) )O-3 ceramics on the basis of sol-gel powders
DOI:10.1007/s10853-010-5092-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:2  AU: Zenkner, Mandy;Koeferstein, Roberto;Ebbinghaus, Stefan G.;Jaeger, Lothar;
7:9:8:7     Synthesis and characterization of a nano-scaled barium cerate perovskite powder using starch as polymerization agent
DOI:10.1016/j.ssi.2011.09.010  JN:SOLID STATE IONICS  PY:2011
  TC:3  AU: Koeferstein, Roberto;Hesse, Dietrich;Ebbinghaus, Stefan G.;
7:9:8:8     Sintering of a fine-grained BaCeO(3) powder obtained from a co-precipitation method
DOI:10.1007/s10853-010-4741-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:6  AU: Koeferstein, Roberto;Jaeger, Lothar;Ebbinghaus, Stefan G.;
7:9:8:9     Synthesis and sintering of nano-sized BaSnO3 powders containing BaGeO3
DOI:10.1007/s10853-010-4432-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:2  AU: Koeferstein, Roberto;Jaeger, Lothar;Zenkner, Mandy;Garcia-Garcia, Francisco Javier;Ebbinghaus, Stefan G.;
7:9:9:1     Sol-Gel Synthesis and Photo-Fenton-Like Catalytic Activity of EuFeO3 Nanoparticles
DOI:10.1111/j.1551-2916.2011.04522.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:25  AU: Ju, Lingling;Chen, Zhiyuan;Fang, Liang;Dong, Wen;Zheng, Fengang;Shen, Mingrong;
7:9:9:2     Controllable Synthesis of Pure-Phase Rare-Earth Orthoferrites Hollow Spheres with a Porous Shell and Their Catalytic Performance for the CO plus NO Reaction
DOI:10.1021/cm101419w  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:33  AU: Li, Xun;Tang, Changjin;Ai, Man;Dong, Lin;Xu, Zheng;
7:9:9:3     Dielectric relaxation of NdMnO3 nanoparticles
DOI:10.1016/j.materresbull.2013.07.027  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:2  AU: Saha, Sujoy;Chanda, Sadhan;Dutta, Alo;Sinha, T. P.;
7:9:9:4     Effect of tartaric acid on the microstructure and photoluminescence of SrTiO3:Pr3+ phosphors prepared by a sol-gel method
DOI:10.1016/j.matchemphys.2010.04.012  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:6  AU: He, Xiuxian;Dong, Wen;Zheng, Fengang;Fang, Liang;Shen, Mingrong;
7:9:9:5     Raman spectroscopy and dielectric properties of nanoceramic NdFeO3
DOI:10.1016/j.materresbull.2012.12.075  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Chanda, Sadhan;Saha, Sujoy;Dutta, Alo;Sinha, T. P.;
7:9:10:1     Molten salts activated by high-energy milling: A useful, low-temperature route for the synthesis of multiferroic compounds
DOI:10.1016/j.jallcom.2013.09.003  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Hernandez-Ramirez, Anayantzin;Martinez-Luevanos, Antonia;Fuentes, Antonio F.;Nelson, Anna-Gay D.;Ewing, Rodney C.;Montemayor, Sagrario M.;
7:9:10:2     Synthesis of LaMo3 (M = Fe, Co, Ni) using nitrate or nitrite molten salts
DOI:10.1016/j.jallcom.2010.08.073  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:15  AU: Yang, Jun;Li, Runsheng;Zhou, Junyi;Li, Xiaoci;Zhang, Yuanming;Long, Yulin;Li, Yongwang;
7:9:10:3     A "Green Chemistry" Approach to the Synthesis of Rare-Earth Aluminates: Perovskite-Type LaAlO3 Nanoparticles in Molten Nitrates
DOI:10.1111/j.1551-2916.2011.05043.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:11  AU: Mendoza-Mendoza, Esmeralda;Montemayor, Sagrario M.;Escalante-Garcia, Jose I.;Fuentes, Antonio F.;
7:9:10:4     Molten salts synthesis and electrical properties of Sr- and/or Mg-doped perovskite-type LaAlO3 powders
DOI:10.1007/s10853-012-6520-1  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:5  AU: Mendoza-Mendoza, Esmeralda;Padmasree, Karinjilottu P.;Montemayor, Sagrario M.;Fuentes, Antonio F.;
7:9:10:5     A facile and "green-chemistry" method to synthesize pure and Nd-doped Y3Al5O12 nanopowders at low-temperatures
DOI:10.1016/j.ceramint.2013.05.057  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:1  AU: Mendoza-Mendoza, Esmeralda;Montemayor, Sagrario M.;Maczka, Miroslaw;Marciniak, Lukasz;Fuentes, Antonio F.;
7:9:10:6     Phase Transitions of BiFeO3-LaFeO3 Solid Solutions
DOI:10.1080/00150191003711301  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Yoneda, Yasuhiro;Kohara, Shinji;Yoshii, Kenji;
7:9:11:1     Innovative solvo-combustion route for the rapid synthesis of MoO3 and Sm2O3 materials
DOI:10.1016/j.ceramint.2013.07.095  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Ruiz-Gomez, Miguel A.;Gomez-Solis, Christian;Zarazua-Morin, Maria E.;Tones-Martinez, Leticia M.;Juarez-Ramirez, Isaias;Sanchez-Martinez, Daniel;Figueroa-Torres, Mayra Z.;
7:9:11:2     Effects of PVA content on the synthesis of LaFeO3 via sol-gel route
DOI:10.1016/j.ceramint.2010.11.045  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:21  AU: Feng, Jiansheng;Liu, Ting;Xu, Yebin;Zhao, Jingyuan;He, Yanyan;
7:9:11:3     Low-temperature combustion synthesis of nanocrystalline HoFeO3 powders via a sol-gel method using glycin
DOI:10.1016/j.ceramint.2012.01.007  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Jiang, Linwen;Liu, Weiliang;Wu, Anhua;Xu, Jun;Liu, Qian;Qian, Guoxing;Zhang, Huaijin;
7:9:11:4     Microstructural study of aged ferrite powders for sensing layers
DOI:10.1016/j.ceramint.2012.11.086  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Tulliani, Jean-Marc;Borgna, Mirko;Grigioni, Ivan;Sora, Isabella Natali;
7:9:11:5     Microstructure and electrical properties of La1-xSrxFeO3(x=0-0.6) film by a screen-printing method
DOI:10.1016/j.matlet.2014.05.140  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Cui, Xueying;Li, Shengli;Zhu, Xinde;
7:9:11:6     Solid-state combustion synthesis of spinel LiMn2O4 using glucose as a fuel
DOI:10.1016/j.ceramint.2012.11.068  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:13  AU: Zhou, Xianyan;Chen, Mimi;Xiang, Mingwu;Bai, Hong Li;Guo, Junming;
7:9:11:7     Electrical characterization of room temperature humidity sensors in La0.8Sr0.2Fe1-xCuxO3 (x=0, 0.05, 0.10)
DOI:10.1016/j.ceramint.2011.11.059  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:6  AU: Cavalieri, A.;Caronna, T.;Natali Sora, I.;Tulliani, J. M.;
7:9:12:1     Low temperature synthesis and photocatalytic property of perovskite-type LaCoO3 hollow spheres
DOI:10.1016/j.jallcom.2013.04.092  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:14  AU: Fu, Shasha;Niu, Helin;Tao, Zhiyin;Song, Jiming;Mao, Changjie;Zhang, Shengyi;Chen, Changle;Wang, Dong;
7:9:12:2     Sol-gel synthesis of Bi3.25La0.75Ti3O12 nanotubes
DOI:10.1016/j.jallcom.2011.01.115  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:4  AU: Wang, Wen;Ke, Hua;Rao, Jiancun;Feng, Jinbiao;Feng, Ming;Jia, Dechang;Zhou, Yu;
7:9:13:1     Screened hybrid functional applied to 3d(0)-> 3d(8) transition-metal perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing parameter on the structural, electronic, and magnetic properties
DOI:10.1103/PhysRevB.86.235117  JN:PHYSICAL REVIEW B  PY:2012
  TC:14  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Aizin, Gregory R.;Dyer, Gregory C.;Transmission line theory of collective plasma excitations in periodic;two-dimensional electron systems: Finite plasmonic crystals and Tamm;states;PHYSICAL REVIEW B;86;23;235316;10.1103/PhysRevB.86.235316;DEC 28 2012;2012;We present a comprehensive theory of the one-dimensional plasmonic;crystal formed in the grating-gated two-dimensional electron gas (2DEG);in semiconductor heterostructures. To describe collective plasma;excitations in the 2DEG, we develop a generalized transmission line;theoretical formalism consistent with the plasma hydrodynamic model. We;then apply this formalism to analyze the plasmonic spectra of 2DEG;systems with steplike periodic changes of electron density, gate;screening, or both. We show that in a periodically modulated 2DEG, a;plasmonic crystal is formed, and we derive closed-form analytical;expressions describing its energy band spectrum for both infinite and;finite size crystals. Our results demonstrate a nonmonotonic dependence;of the plasmonic band gap width on the electron density modulation. At;so-called transparency points, where the plasmon propagates through the;periodic 2DEG in a resonant manner, the plasmonic band gaps vanish. In;semi-infinite plasmonic crystals, we demonstrate the formation of;plasmonic Tamm states and analytically derive their energy dispersion;and spatial localization. Finally, we present detailed numerical;analysis of the plasmonic band structure of a finite four-period;plasmonic crystal terminated either by an ohmic contact or by an;infinite barrier on each side. We trace the evolution of the plasmonic;band spectrum, including the Tamm states, with changing electron density;modulation and analyze the boundary conditions necessary for formation;of the Tamm states. We also analyze interaction between the Tamm states;formed at the opposite edges of the short length plasmonic crystal. The;validity of our theoretical approach was confirmed in experimental;studies of plasmonic crystals in short, modulated plasmonic cavities;[Dyer et al., Phys. Rev. Lett. 109, 126803 (2012)], which demonstrated;excellent quantitative agreement between theory and experiment.;DOI:10.1103/PhysRevB.86.235316;9;0;0;0;9;1098-0121;WOS:000312833200005;;;J;Arakawa, Tomonori;Tanaka, Takahiro;Chida, Kensaku;Matsuo, Sadashige;Nishihara, Yoshitaka;Chiba, Daichi;Kobayashi, Kensuke;Ono, Teruo;Fukushima, Akio;Yuasa, Shinji;Low-frequency and shot noises in CoFeB/MgO/CoFeB magnetic tunneling;junctions;PHYSICAL REVIEW B;86;22;224423;10.1103/PhysRevB.86.224423;DEC 28 2012;2012;The low-frequency and shot noises in spin-valve CoFeB/MgO/CoFeB magnetic;tunneling junctions were studied at low temperature. The measured 1/f;noise around the magnetic hysteresis loops of the free layer indicates;that the main origin of the 1/f noise is the magnetic fluctuation, which;is discussed in terms of a fluctuation-dissipation relation. Random;telegraph noise (RTN) is observed to be symmetrically enhanced in the;hysteresis loop with regard to the two magnetic configurations. We found;that this enhancement is caused by the fluctuation between two magnetic;states in the free layer. Although the 1/f noise is almost independent;of the magnetic configuration, the RTN is enhanced in the antiparallel;configuration. These findings indicate the presence of spin-dependent;activation of RTN. Shot noise reveals the spin-dependent coherent;tunneling process via a crystalline MgO barrier. DOI:;10.1103/PhysRevB.86.224423;Kobayashi, Kensuke/E-5404-2010;Kobayashi, Kensuke/0000-0001-7072-5945;4;0;0;0;4;1098-0121;WOS:000312832400004;;;J;Cucchiara, J.;Le Gall, S.;Fullerton, E. E.;Kim, J. -V.;Ravelosona, D.;Henry, Y.;Katine, J. A.;Kent, A. D.;Bedau, D.;Gopman, D.;Mangin, S.;Domain wall motion in nanopillar spin-valves with perpendicular;anisotropy driven by spin-transfer torques;PHYSICAL REVIEW B;86;21;214429;10.1103/PhysRevB.86.214429;DEC 28 2012;2012;Using transport measurements and micromagnetic simulations we have;investigated the domain wall motion driven by spin-transfer torques in;all-perpendicular hexagonal nanopillar spin-valves. In particular, we;probe domain walls nucleated in the free layer of the spin-valves, which;are then pinned in the devices. We have determined both the;field-current state diagrams for the domain-wall state and the thermally;activated dynamics of the nucleation and depinning processes. We show;that the nucleation process is well-described by a modified Neel-Brown;model taking into account the spin-transfer torque, whereas the;depinning process is independent of the current. This is confirmed by an;analytical calculation which shows that spin-torques have no effect on;the Arrhenius escape rate associated with thermally activated domain;wall depinning in this geometry. Furthermore, micromagnetic simulations;indicate that spin-transfer only weakly affects the domain wall motion,;but instead modifies the inner domain wall structure. DOI:;10.1103/PhysRevB.86.214429;Kim, Joo-Von/B-3672-2008; Fullerton, Eric/H-8445-2013;Kim, Joo-Von/0000-0002-3849-649X; Fullerton, Eric/0000-0002-4725-9509;0;0;0;0;0;1098-0121;WOS:000312830800003;;;J;Fernandez-Dominguez, A. I.;Zhang, P.;Luo, Y.;Maier, S. A.;Garcia-Vidal, F. J.;Pendry, J. B.;Transformation-optics insight into nonlocal effects in separated;nanowires;PHYSICAL REVIEW B;86;24;241110;10.1103/PhysRevB.86.241110;DEC 28 2012;2012;We present a transformation-optics approach which sheds analytical;insight into the impact that spatial dispersion has on the optical;response of separated dimers of metallic nanowires. We show that;nonlocal effects are apparent at interparticle distances one order of;magnitude larger than the longitudinal plasmon decay length, which;coincides with the spatial regime where electron tunneling phenomena;occur. Our method also clarifies the interplay between nonlocal and;radiation effects taking place in the nanostructure, yielding the dimer;dimensions that optimize its light harvesting capabilities. DOI:;10.1103/PhysRevB.86.241110;Luo, Yu/C-7799-2009; Fernandez-Dominguez, Antonio I./C-4448-2013; Garcia-Vidal, Francisco /B-8280-2011;Luo, Yu/0000-0003-2925-682X; Fernandez-Dominguez, Antonio;I./0000-0002-8082-395X; Garcia-Vidal, Francisco /0000-0003-4354-0982;10;0;0;0;10;1098-0121;WOS:000312834100001;;;J;Gati, E.;Koehler, S.;Guterding, D.;Wolf, B.;Knoener, S.;Ran, S.;Bud'ko, S. L.;Canfield, P. C.;Lang, M.;Hydrostatic-pressure tuning of magnetic, nonmagnetic, and;superconducting states in annealed Ca(Fe1-xCox)(2)As-2;PHYSICAL REVIEW B;86;22;220511;10.1103/PhysRevB.86.220511;DEC 28 2012;2012;We report on measurements of the magnetic susceptibility and electrical;resistance under He-gas pressure on single crystals of;Ca(Fe1-xCox)(2)As-2. We find that for properly heat-treated crystals;with modest Co concentration, x = 0.028, the salient ground states;associated with iron-arsenide superconductors, i.e.,;orthorhombic/antiferromagnetic (o/afm), superconducting, and nonmagnetic;collapsed-tetragonal (cT) states can be accessed all in one sample with;reasonably small and truly hydrostatic pressure. This is possible owing;to the extreme sensitivity of the o/afm (for T <= T-s,T-N) and;superconducting (T <= T-c) states against variation of pressure,;disclosing pressure coefficients of dT(s,N)/dP = -(1100 +/- 50) K/GPa;and dT(c)/dP = -(60 +/- 3) K/GPa, respectively. Systematic;investigations of the various phase transitions and ground states via;pressure tuning revealed no coexistence of bulk superconductivity (sc);with the o/afm state which we link to the strongly first-order character;of the corresponding structural/magnetic transition in this compound.;Our results, together with literature results, indicate that preserving;fluctuations associated with the o/afm transition to low enough;temperatures is vital for sc to form. DOI: 10.1103/PhysRevB.86.220511;Canfield, Paul/H-2698-2014;14;0;0;0;14;1098-0121;WOS:000312832400001;;;J;Hakobyan, Ye.;Tadmor, E. B.;James, R. D.;Objective quasicontinuum approach for rod problems;PHYSICAL REVIEW B;86;24;245435;10.1103/PhysRevB.86.245435;DEC 28 2012;2012;An objective quasicontinuum (OQC) method is developed for simulating;rodlike systems that can be represented as a combination of locally;objective structures. An objective structure (OS) is one for which a;group of atoms, called a "fundamental domain" (FD), is repeated using;specific rules of translation and rotation to build a more complex;structure. An objective Cauchy-Born rule defines the kinematics of the;OS atoms in terms of a set of symmetry parameters and the positions of;the FD atoms. The computational advantage lies in the capability of;representing a large system of atoms through a small set of symmetry;parameters and FD atom positions. As an illustrative example, we;consider the deformation of a copper single-crystal nanobeam which can;be described as an OS. OQC simulations are performed for uniform and;nonuniform bending for two different orientations (nanobeam axis;oriented along [111] and [100]) and compared with elastica results. In;the uniform bending case, the [111]-oriented single-crystal nanobeam;experiences elongation, while the [100]-oriented nanobeam experiences;contraction in total length. The nonuniform bending allows for;stretching, contraction, and bending as deformation. Under certain;loading conditions, dislocation nucleation is observed within the FD.;DOI: 10.1103/PhysRevB.86.245435 PACS number(s): 61.46.Km, 62.23.Hj,;81.07.Gf, 02.70.Ns;1;0;0;0;1;1098-0121;WOS:000312834100006;;;J;He, Jing;Wang, Bo;Kou, Su-Peng;Ferromagnetism and antiferromagnetism of a correlated topological;insulator with a flat band;PHYSICAL REVIEW B;86;23;235146;10.1103/PhysRevB.86.235146;DEC 28 2012;2012;In this paper, based on the mean-field approach and random-phase;approximation, we studied the magnetic properties of the spinfull;Haldane model on honeycomb lattice of topological flat band with onsite;repulsive Coulomb interaction. We found that the antiferromagnetic (AF);order is more stable than the ferromagnetic (FM) order at, or near, half;filling. Away from half filling, the phase diagram becomes complex: at;large doping, the FM order is more stable than the AF order due to the;flatness of band structure. In particular, we found that at quarter;filling, the system becomes a Chern number Q = 1 topological insulator;induced by the FM order. DOI:10.1103/PhysRevB.86.235146;1;0;0;0;1;1098-0121;WOS:000312833200002;;;J;Hu, Jianbo;Misochko, Oleg V.;Goto, Arihiro;Nakamura, Kazutaka G.;Delayed formation of coherent LO phonon-plasmon coupled modes in n- and;p-type GaAs measured using a femtosecond coherent control technique;PHYSICAL REVIEW B;86;23;235145;10.1103/PhysRevB.86.235145;DEC 28 2012;2012;Coherent control experiments using a pair of collinear femtosecond laser;pulses have been carried out to manipulate longitudinal optical (LO);phonon-plasmon coupled (LOPC) modes in both p-and n-type GaAs. By tuning;the interpulse separation, remarkably distinct responses have been;observed in the two samples. To understand the results obtained a;phenomenological model taking the delayed formation of coherent LOPC;modes into account is proposed. The model suggests that the lifetime of;coherent LOPC modes plays a key role and the interference of the;coherent LO phonons excited successively by two pump pulses strongly;affects the manipulation of coherent LOPC modes.;DOI:10.1103/PhysRevB.86.235145;Oleg, Misochko/E-6136-2013; Nakamura, Kazutaka/F-4095-2014;0;0;0;0;0;1098-0121;WOS:000312833200001;;;J;Imura, Ken-Ichiro;Okamoto, Mayuko;Yoshimura, Yukinori;Takane, Yositake;Ohtsuki, Tomi;Finite-size energy gap in weak and strong topological insulators;PHYSICAL REVIEW B;86;24;245436;10.1103/PhysRevB.86.245436;DEC 28 2012;2012;The nontrivialness of a topological insulator (TI) is characterized;either by a bulk topological invariant or by the existence of a;protected metallic surface state. Yet, in realistic samples of finite;size, this nontrivialness does not necessarily guarantee the gaplessness;of the surface state. Depending on the geometry and on the topological;indices, a finite-size energy gap of different nature can appear, and,;correspondingly, exhibit various scaling behaviors of the gap. The;spin-to-surface locking provides one such gap-opening mechanism,;resulting in a power-law scaling of the energy gap. Weak and strong TIs;show different degrees of sensitivity to the geometry of the sample. As;a noteworthy example, a strong TI nanowire of a rectangular-prism shape;is shown to be more gapped than that of a weak TI of precisely the same;geometry. DOI: 10.1103/PhysRevB.86.245436 PACS number(s): 73.22.-f,;73.20.At, 72.80.Sk;Imura, Ken/D-6633-2013;11;0;0;0;11;1098-0121;WOS:000312834100007;;;J;Lenertz, M.;Alaria, J.;Stoeffler, D.;Colis, S.;Dinia, A.;Mentre, O.;Andre, G.;Porcher, F.;Suard, E.;Magnetic structure of ground and field-induced ordered states of;low-dimensional alpha-CoV2O6: Experiment and theory;PHYSICAL REVIEW B;86;21;214428;10.1103/PhysRevB.86.214428;DEC 28 2012;2012;In this work, we investigate the magnetic properties of the monoclinic;alpha-CoV2O6 by powder neutron diffraction measurements and ab initio;calculations. An emphasis has been pointed towards the magnetic;structure and the interaction between the Co ions leading to magnetic;frustrations in this compound. Neutron diffraction experiments were;carried out both in the ground state (zero magnetic field) and under;applied external field of 2.5 and 5 T corresponding to the ferrimagnetic;and ferromagnetic states, respectively. The antiferromagnetic ground;state below 14 K corresponds to k = (1,0, 1/2) magnetic propagation;vector in C1 space group. The magnetic structure can be described by;ferromagnetic interactions along the chains (b axis) and;antiferromagnetic coupling between the chains (along a and c axes). The;ferrimagnetic structure implies a ninefold unit cell (3a, b, 3c) in;which ferromagnetic chains follow an "up-up-down" sequence along the a;and c axes. In the ferromagnetic state, the spin orientations remain;unchanged while every chain lies ferromagnetically ordered. In all;cases, the magnetic moments lie in the ac plane, along the CoO6;octahedra axis, at an angle of 9.3 degrees with respect to the c axis.;The magnetic structure of alpha-CoV2O6 resolved for all the ordered;states is successfully related to a theoretical model. Ab initio;calculations allowed us to (i) confirm the ground-state magnetic;structure, (ii) calculate the interactions between the Co ions, (iii);explain the frustration leading to the stepped variation of the;magnetization curves, (iv) calculate the orbital magnetic moment (1.5;mu(B)) on Co atoms, and (v) confirm the direction of the magnetic;moments near the c direction. DOI: 10.1103/PhysRevB.86.214428;10;0;0;0;10;1098-0121;WOS:000312830800002;;;J;Nakajima, Nobuo;Oki, Megumi;Isohama, Yoichi;Maruyama, Hiroshi;Tezuka, Yasuhisa;Ishiji, Kotaro;Iwazumi, Toshiaki;Okada, Kozo;Enhancement of dielectric constant of BaTiO3 nanoparticles studied by;resonant x-ray emission spectroscopy;PHYSICAL REVIEW B;86;22;224114;10.1103/PhysRevB.86.224114;DEC 28 2012;2012;The nanoscopic origin of the enhancement of the dielectric constant of;BaTiO3 nanoparticles was investigated by means of Ti K beta resonant;x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer;excitations were observed, one of which disappeared as the particle size;(d) was reduced, while the other remained unchanged. This is consistent;with the fact that tetragonality was also reduced with decreasing d. The;origin of the large enhancement in the dielectric constant is briefly;discussed from a microscopic point of view. DOI:;10.1103/PhysRevB.86.224114;3;0;0;0;3;1098-0121;WOS:000312832400003;;;J;Olmon, Robert L.;Slovick, Brian;Johnson, Timothy W.;Shelton, David;Oh, Sang-Hyun;Boreman, Glenn D.;Raschke, Markus B.;Optical dielectric function of gold;PHYSICAL REVIEW B;86;23;235147;10.1103/PhysRevB.86.235147;DEC 28 2012;2012;In metal optics gold assumes a special status because of its practical;importance in optoelectronic and nano-optical devices, and its role as a;model system for the study of the elementary electronic excitations that;underlie the interaction of electromagnetic fields with metals. However,;largely inconsistent values for the frequency dependence of the;dielectric function describing the optical response of gold are found in;the literature. We performed precise spectroscopic ellipsometry;measurements on evaporated gold, template-stripped gold, and;single-crystal gold to determine the optical dielectric function across;a broad spectral range from 300 nm to 25 mu m (0.05-4.14 eV) with high;spectral resolution. We fit the data to the Drude free-electron model,;with an electron relaxation time tau(D) = 14 +/- 3 fs and plasma energy;h omega(p) = 8.45 eV. We find that the variation in dielectric functions;for the different types of samples is small compared to the range of;values reported in the literature. Our values, however, are comparable;to the aggregate mean of the collection of previous measurements from;over the past six decades. This suggests that although some variation;can be attributed to surface morphology, the past measurements using;different approaches seem to have been plagued more by systematic errors;than previously assumed. DOI:10.1103/PhysRevB.86.235147;22;2;0;0;22;1098-0121;WOS:000312833200003;;;J;Phuong, L. Q.;Ichimiya, M.;Ishihara, H.;Ashida, M.;Multiple light-coupling modes of confined excitons observable in;photoluminescence spectra of high-quality CuCl thin films;PHYSICAL REVIEW B;86;23;235449;10.1103/PhysRevB.86.235449;DEC 28 2012;2012;We report the observation of multiple light-coupling modes of excitons;confined in CuCl thin films with thicknesses of a few hundred nanometers;beyond the long-wavelength approximation in photoluminescence spectra.;Due to a remarkably long coupling length between light and;multinode-type excitons resulted from very high crystalline quality of;thin films, photoluminescence signals from the excitonic states;corresponding to not only odd but also even quantum numbers, which are;optically forbidden in the long-wavelength approximation, are clearly;observed. The full width at half maximum of the excitonic state deduced;qualitatively from the corresponding photoluminescence band shows almost;the same dependence on the quantum number as the theoretical prediction.;DOI:10.1103/PhysRevB.86.235449;0;0;0;0;0;1098-0121;WOS:000312833200008;;;J;Reynoso, Andres A.;Usaj, Gonzalo;Balseiro, C. A.;Feinberg, D.;Avignon, M.;Spin-orbit-induced chirality of Andreev states in Josephson junctions;PHYSICAL REVIEW B;86;21;214519;10.1103/PhysRevB.86.214519;DEC 28 2012;2012;We study Josephson junctions (JJs) in which the region between the two;superconductors is a multichannel system with Rashba spin-orbit coupling;(SOC) where a barrier or a quantum point contact (QPC) is present. These;systems might present unconventional Josephson effects such as Josephson;currents for zero phase difference or critical currents that depend on;the current direction. Here, we discuss how the spin polarizing;properties of the system in the normal state affect the spin;characteristics of the Andreev bound states inside the junction. This;results in a strong correlation between the spin of the Andreev states;and the direction in which they transport Cooper pairs. While the;current-phase relation for the JJ at zero magnetic field is;qualitatively unchanged by SOC, in the presence of a weak magnetic;field, a strongly anisotropic behavior and the mentioned anomalous;Josephson effects follow. We show that the situation is not restricted;to barriers based on constrictions such as QPCs and should generically;arise if in the normal system the direction of the carrier's spin is;linked to its direction of motion. DOI: 10.1103/PhysRevB.86.214519;Usaj, Gonzalo/E-6394-2010;Usaj, Gonzalo/0000-0002-3044-5778;5;0;0;0;5;1098-0121;WOS:000312830800005;;;J;Sato, W.;Komatsuda, S.;Ohkubo, Y.;Characteristic local association of In impurities dispersed in ZnO;PHYSICAL REVIEW B;86;23;235209;10.1103/PhysRevB.86.235209;DEC 28 2012;2012;Local environments in 0.5 at.% In-doped ZnO were investigated by means;of the time-differential perturbed angular correlation (TDPAC) method.;In a comparative study, using the Cd-111 probe nuclei as the decay;products of different parents, In-111 and Cd-111m, we found that In-111;microscopically forms a unique structure with nonradioactive In ion(s);dispersed in ZnO, whereas (111)mCd has no specific interaction with the;In impurities. The spectral damping of the TDPAC spectra is attributed;to the aftereffect following the EC decay of In-111. It was demonstrated;from the aftereffect that the local density and/or mobility of;conduction electrons at the In-111 probe site in the In-doped ZnO is;lowered due to the characteristic structure locally formed by the;dispersed In ion(s). DOI:10.1103/PhysRevB.86.235209;1;0;0;0;1;1098-0121;WOS:000312833200004;;;J;Sherman, Benjamin L.;Wilson, Hugh F.;Weeraratne, Dayanthie;Militzer, Burkhard;Ab initio simulations of hot dense methane during shock experiments;PHYSICAL REVIEW B;86;22;224113;10.1103/PhysRevB.86.224113;DEC 28 2012;2012;Using density functional theory molecular dynamics simulations, we;predict shock Hugoniot curves of precompressed methane up to 75 000 K;for initial densities ranging from 0.35 to 0.70 g cm(-3). At 4000 K, we;observe the transformation into a metallic, polymeric state consisting;of long hydrocarbon chains. These chains persist when the sample is;quenched to 300 K, leading to an increase in shock compression. At 6000;K, the sample transforms into a plasma composed of many, short-lived;chemical species. We conclude by discussing implications for the;interiors of Uranus and Neptune and analyzing the possibility of;creating a superionic state of methane in high pressure experiments.;DOI:10.1103/PhysRevB.86.224113;Wilson, Hugh/B-3447-2009;4;0;0;0;4;1098-0121;WOS:000312832400002;;;J;Trescher, Maximilian;Bergholtz, Emil J.;Flat bands with higher Chern number in pyrochlore slabs;PHYSICAL REVIEW B;86;24;241111;10.1103/PhysRevB.86.241111;DEC 28 2012;2012;A large number of recent works point to the emergence of intriguing;analogs of fractional quantum Hall states in lattice models due to;effective interactions in nearly flat bands with Chern number C = 1.;Here, we provide an intuitive and efficient construction of almost;dispersionless bands with higher Chern numbers. Inspired by the physics;of quantum Hall multilayers and pyrochlore-based transition-metal;oxides, we study a tight-binding model describing spin-orbit coupled;electrons in N parallel kagome layers connected by apical sites forming;N - 1 intermediate triangular layers (as in the pyrochlore lattice). For;each N, we find finite regions in parameter space giving a virtually;flat band with C = N. We analytically express the states within these;topological bands in terms of single-layer states and thereby explicitly;demonstrate that the C = N wave functions have an appealing structure in;which layer index and translations in reciprocal space are intricately;coupled. This provides a promising arena for new collective states of;matter. DOI: 10.1103/PhysRevB.86.241111;Bergholtz, Emil/C-3820-2008;Bergholtz, Emil/0000-0002-9739-2930;29;0;1;0;29;1098-0121;WOS:000312834100002;;;J;van Duijn, J.;Ruiz-Bustos, R.;Daoud-Aladine, A.;Kagome-like lattice distortion in the pyrochlore material Hg2Ru2O7;PHYSICAL REVIEW B;86;21;214111;10.1103/PhysRevB.86.214111;DEC 28 2012;2012;The structural transition which accompanies the metal to insulator;transition (MIT), at T = 107 K, in the pyrochlore material Hg2Ru2O7, was;investigated by high-resolution neutron powder diffraction measurements.;Below the MIT the symmetry is lowered from cubic to monoclinic and the;Ru-Ru bonds, which are equal in the pyrochlore phase (3.60147 angstrom),;become split into short (3.599 37 angstrom), medium (3.6028 angstrom),;and long bonds (3.6047 angstrom). As a result the exchange interactions;between the Ru atoms become more two dimensional. The short and medium;bonds form layers, which are separated by the long bonds, that run;parallel to the monoclinic ab plane. Overall the low-temperature;structure of Hg2Ru2O7 can best be described as a stacking of Kagome-like;layers. DOI: 10.1103/PhysRevB.86.214111;0;0;0;0;0;1098-0121;WOS:000312830800001;;;J;Vanevic, Mihajlo;Belzig, Wolfgang;Control of electron-hole pair generation by biharmonic voltage drive of;a quantum point contact;PHYSICAL REVIEW B;86;24;241306;10.1103/PhysRevB.86.241306;DEC 28 2012;2012;A time-dependent electromagnetic field creates electron-hole excitations;in a Fermi sea at low temperature. We show that the electron-hole pairs;can be generated in a controlled way using harmonic and biharmonic;time-dependent voltages applied to a quantum contact, and we obtain the;probabilities of the pair creations. For a biharmonic voltage drive, we;find that the probability of a pair creation decreases in the presence;of an in-phase second harmonic. This accounts for the suppression of the;excess noise observed experimentally (Gabelli and Reulet,;arXiv:1205.3638), proving that dynamic control and detection of;elementary excitations in quantum conductors are within the reach of the;present technology. DOI: 10.1103/PhysRevB.86.241306;6;1;0;0;6;1098-0121;WOS:000312834100004;;;J;Virgus, Yudistira;Purwanto, Wirawan;Krakauer, Henry;Zhang, Shiwei;Ab initio many-body study of cobalt adatoms adsorbed on graphene;PHYSICAL REVIEW B;86;24;241406;10.1103/PhysRevB.86.241406;DEC 28 2012;2012;Many recent calculations have been performed to study a Co atom adsorbed;on graphene, with significantly varying results on the nature of the;bonding. We use the auxiliary-field quantum Monte Carlo method and a;size-correction embedding scheme to accurately calculate the binding;energy of Co on graphene. We find that as a function of the distance h;between the Co atom and the sixfold hollow site, there are three;distinct ground states corresponding to three electronic configurations;of the Co atom. Two of these states provide binding and exhibit a;double-well feature with nearly equal binding energy of 0.4 eV at h =;1.51 and h = 1.65 angstrom, corresponding to low-spin Co-2 (3d(9) 4s(0));and high-spin Co-4 (3d(8) 4s(1)), respectively. DOI:;10.1103/PhysRevB.86.241406;3;0;0;0;3;1098-0121;WOS:000312834100005;;;J;Xing, Jie;Li, Sheng;Ding, Xiaxin;Yang, Huan;Wen, Hai-Hu;Superconductivity appears in the vicinity of semiconducting-like;behavior in CeO1-xFxBiS2;PHYSICAL REVIEW B;86;21;214518;10.1103/PhysRevB.86.214518;DEC 28 2012;2012;Resistive and magnetic properties have been measured in BiS2-based;samples CeO1-xFxBiS2 with a systematic substitution of O with F (0 < x <;0.6). In contrast to the band-structure calculations, it is found that;the parent phase of CeOBiS2 is a bad metal instead of a band insulator.;By doping electrons into the system, it is surprising to find that;superconductivity appears together with a semiconducting normal state.;This evolution is clearly different from the cuprate and the iron;pnictide systems, and is interpreted as approaching the Pomeranchuk;transition with a von Hove singularity and the possible;charge-density-wave instability. Furthermore, ferromagnetism, which may;arise from the Ce magnetic moments, has been observed in the;low-temperature region in all samples, suggesting the coexistence of;superconductivity and ferromagnetism in the superconducting samples.;DOI: 10.1103/PhysRevB.86.214518;55;0;1;0;56;1098-0121;WOS:000312830800004;;;J;Yaji, Koichiro;Hatta, Shinichiro;Aruga, Tetsuya;Okuyama, Hiroshi;Structural and electronic properties of the Pb/Ge(111)-beta(root 3 x;root 3)R30 degrees surface studied by photoelectron spectroscopy and;first-principles calculations;PHYSICAL REVIEW B;86;23;235317;10.1103/PhysRevB.86.235317;DEC 28 2012;2012;We have studied structural and electronic properties of a Ge(111);surface covered with a monatomic Pb layer [Pb/Ge(111)-beta] by means of;core-level photoelectron spectroscopy, angle-resolved photoelectron;spectroscopy (ARPES), and a first-principles band structure calculation.;There has been a controversy about the surface structure of;Pb/Ge(111)-beta between a close-packed model with a coverage of 4/3;monolayers and a trimer model with a coverage of 1 monolayer. This;problem has been examined by analyzing the line shape of a Pb 5d;core-level spectrum and comparing the experimental band structure with;those calculated for two models. The line shape of the core-level;spectrum agrees with a close-packed model. The valence band structure;observed by ARPES has been well reproduced by the calculation employing;the close-packed model. The close-packed model therefore describes;correctly the surface structure of Pb/Ge(111)-beta. The;scanning-tunneling microscopy (STM) image simulated for the close-packed;model is in good agreement with the experimental filled-state STM image,;in which three protrusions per unit cell were observed.;DOI:10.1103/PhysRevB.86.235317;Aruga, Tetsuya/B-7782-2010; Okuyama, Hiroshi/H-7570-2014;2;1;0;0;2;1098-0121;WOS:000312833200006;;;J;Yang, Shuo;Gu, Zheng-Cheng;Sun, Kai;Das Sarma, S.;Topological flat band models with arbitrary Chern numbers;PHYSICAL REVIEW B;86;24;241112;10.1103/PhysRevB.86.241112;DEC 28 2012;2012;We report the theoretical discovery of a systematic scheme to produce;topological flat bands (TFBs) with arbitrary Chern numbers. We find that;generically a multiorbital high Chern number TFB model can be;constructed by considering multilayer Chern number C = 1 TFB models with;enhanced translational symmetry. A series of models are presented as;examples, including a two-band model on a triangular lattice with a;Chern number C = 3 and an N-band square lattice model with C = N for an;arbitrary integer N. In all these models, the flatness ratio for the;TFBs is larger than 30 and increases with increasing Chern number. In;the presence of appropriate interparticle interactions, these models are;likely to lead to the formation of Abelian and non-Abelian fractional;Chern insulators. As a simple example, we test the C = 2 model with;hardcore bosons at 1/3 filling, and an intriguing fractional quantum;Hall state is observed. DOI: 10.1103/PhysRevB.86.241112;Sun, Kai/F-2282-2010; Yang, Shuo/D-1372-2011; Das Sarma, Sankar/B-2400-2009; Gu, Zheng-Cheng/L-5415-2014;Sun, Kai/0000-0001-9595-7646; Yang, Shuo/0000-0001-9733-8566;;24;0;1;0;24;1098-0121;WOS:000312834100003;;;J;Yue, Qu;Chang, Shengli;Tan, Jichun;Qin, Shiqiao;Kang, Jun;Li, Jingbo;Symmetry-dependent transport properties and bipolar spin filtering in;zigzag alpha-graphyne nanoribbons;PHYSICAL REVIEW B;86;23;235448;10.1103/PhysRevB.86.235448;DEC 28 2012;2012;First-principles calculations are performed to investigate the transport;properties of zigzag alpha-graphyne nanoribbons (ZaGNRs). It is found;that asymmetric Z alpha GNRs behave as conductors with linear;current-voltage relationships, whereas symmetric Z alpha GNRs have very;small currents under finite bias voltages, similar to those of zigzag;graphene nanoribbons. The symmetry-dependent transport properties arise;from different coupling rules between the pi and pi* subbands around the;Fermi level, which are dependent on the wave-function symmetry of the;two subbands. Based on the coupling rules, we further demonstrate the;bipolar spin-filtering effect in the symmetric Z alpha GNRs. It is shown;that nearly 100% spin-polarized current can be produced and modulated by;the direction of bias voltage and/or magnetization configuration of the;electrodes. Moreover, the magnetoresistance effect with the order larger;than 500 000% is also predicted. Our calculations suggest Z alpha GNRs;as a promising candidate material for spintronics.;DOI:10.1103/PhysRevB.86.235448;Kang, Jun/F-7105-2011;7;1;0;0;7;1098-0121;WOS:000312833200007;;;J;Berry, Joel;Provatas, Nikolas;Rottler, Joerg;Sinclair, Chad W.;Defect stability in phase-field crystal models: Stacking faults and;partial dislocations;PHYSICAL REVIEW B;86;22;224112;10.1103/PhysRevB.86.224112;DEC 27 2012;2012;The primary factors controlling defect stability in phase-field crystal;(PFC) models are examined, with illustrative examples involving several;existing variations of the model. Guidelines are presented for;constructing models with stable defect structures that maintain high;numerical efficiency. The general framework combines both long-range;elastic fields and basic features of atomic-level core structures, with;defect dynamics operable over diffusive time scales. Fundamental;elements of the resulting defect physics are characterized for the case;of fcc crystals. Stacking faults and split Shockley partial dislocations;are stabilized for the first time within the PFC formalism, and various;properties of associated defect structures are characterized. These;include the dissociation width of perfect edge and screw dislocations,;the effect of applied stresses on dissociation, Peierls strains for;glide, and dynamic contraction of gliding pairs of partials. Our results;in general are shown to compare favorably with continuum elastic;theories and experimental findings. DOI: 10.1103/PhysRevB.86.224112;Rottler, Joerg/L-5539-2013;8;0;0;0;8;1098-0121;WOS:000312831900001;;;J;Emary, Clive;Lambert, Neill;Nori, Franco;Leggett-Garg inequality in electron interferometers;PHYSICAL REVIEW B;86;23;235447;10.1103/PhysRevB.86.235447;DEC 27 2012;2012;We consider the violation of the Leggett-Garg inequality in electronic;Mach-Zehnder inteferometers. This setup has two distinct advantages over;earlier quantum-transport proposals: Firstly, the required correlation;functions can be obtained without time-resolved measurements. Secondly,;the geometry of an interferometer allows one to construct the;correlation functions from ideal negative measurements, which addresses;the noninvasiveness requirement of the Leggett-Garg inequality. We;discuss two concrete realizations of these ideas: the first in quantum;Hall edge-channels, the second in a double quantum dot interferometer.;DOI: 10.1103/PhysRevB.86.235447 PACS number(s): 03.65.Ud, 73.23.-b,;03.65.Ta, 42.50.Lc;Lambert, Neill/B-4998-2009; Emary, Clive/B-9596-2008; Nori, Franco/B-1222-2009;Emary, Clive/0000-0002-9822-8390; Nori, Franco/0000-0003-3682-7432;3;0;0;0;3;1098-0121;WOS:000312832900004;;;J;Kato, Yuto;Endo, Akira;Katsumoto, Shingo;Iye, Yasuhiro;Geometric resonances in the magnetoresistance of hexagonal lateral;superlattices;PHYSICAL REVIEW B;86;23;235315;10.1103/PhysRevB.86.235315;DEC 27 2012;2012;We have measured magnetoresistance of hexagonal lateral superlattices.;We observe three types of oscillations engendered by periodic potential;modulation having hexagonal-lattice symmetry: amplitude modulation of;the Shubnikov-de Haas oscillations, commensurability oscillations, and;the geometric resonances of open orbits generated by Bragg reflections.;The latter two reveal the presence of two characteristic periodicities,;root 3a/2 and a/2, inherent in a hexagonal lattice with the lattice;constant a. The formation of the hexagonal-superlattice minibands;manifested by the observation of open orbits marks the first step toward;realizing massless Dirac fermions in semiconductor 2DEGs. DOI:;10.1103/PhysRevB.86.235315 PACS number(s): 73.43.Qt, 73.23.-b, 73.21.Cd;1;0;0;0;1;1098-0121;WOS:000312832900002;;;J;Lin, I-Tan;Liu, Jia-Ming;Shi, Kai-Yao;Tseng, Pei-Shan;Wu, Kuang-Hsiung;Luo, Chih-Wei;Li, Lain-Jong;Terahertz optical properties of multilayer graphene: Experimental;observation of strong dependence on stacking arrangements and;misorientation angles;PHYSICAL REVIEW B;86;23;235446;10.1103/PhysRevB.86.235446;DEC 27 2012;2012;The optical conductivity of monolayer and multilayer graphene in the;terahertz spectral region is experimentally measured using terahertz;time-domain spectroscopy. The stacking arrangement and the;misorientation angle of each sample are determined by Raman;spectroscopy. The chemical potential of each sample is measured using;ultrafast midinfrared pump-probe spectroscopy to be 63 or 64 meV for all;samples. The intraband scattering rate can be obtained by fitting the;measured data with theoretical models. Other physical parameters,;including carrier density, dc conductivity, and carrier mobility, of;each sample can also be deduced from the theoretical fitting. The;fitting results show the existence of misoriented or AA-stacked layers;with an interaction energy of alpha(1) = 217 meV in our multilayer;samples. Here we show that the scattering rate strongly depends on the;stacking arrangement of the sample. High scattering rates and high;optical conductivity are associated with AA-stacked samples, while lower;ones are associated with misoriented multilayer graphene. This implies;that the THz optoelectronic properties of multilayer graphene can be;tuned by purposefully misorienting layers or employing different;stacking schemes. DOI: 10.1103/PhysRevB.86.235446 PACS number(s):;78.67.Wj, 61.48.Gh, 72.80.Vp, 73.50.Mx;Li, Lain-Jong/D-5244-2011; Luo, Chih Wei/D-3485-2013;Li, Lain-Jong/0000-0002-4059-7783; Luo, Chih Wei/0000-0002-6453-7435;11;0;0;0;11;1098-0121;WOS:000312832900003;;;J;Lundgren, Rex;Chua, Victor;Fiete, Gregory A.;Entanglement entropy and spectra of the one-dimensional Kugel-Khomskii;model;PHYSICAL REVIEW B;86;22;224422;10.1103/PhysRevB.86.224422;DEC 27 2012;2012;We study the quantum entanglement of the spin and orbital degrees of;freedom in the one-dimensional Kugel-Khomskii model, which includes both;gapless and gapped phases, using analytical techniques and exact;diagonalization with up to 16 sites. We compute the entanglement entropy;and the entanglement spectra using a variety of partitions or "cuts" of;the Hilbert space, including two distinct real-space cuts and a;momentum-space cut. Our results show that the Kugel-Khomski model;possesses a number of new features not previously encountered in studies;of the entanglement spectra. Notably, we find robust gaps in the;entanglement spectra for both gapped and gapless phases with the orbital;partition, and show these are not connected to each other. The counting;of the low-lying entanglement eigenvalues shows that the "virtual edge";picture, which equates the low-energy Hamiltonian of a virtual edge,;here one gapless leg of a two-leg ladder, to the "low-energy";entanglement Hamiltonian, breaks down for this model, even though the;equivalence has been shown to hold for a similar cut in a large class of;closely related models. In addition, we show that a momentum space cut;in the gapless phase leads to qualitative differences in the;entanglement spectrum when compared with the same cut in the gapless;spin-1/2 Heisenberg spin chain. We emphasize the new information content;in the entanglement spectra compared to the entanglement entropy, and;using quantum entanglement, we present a refined phase diagram of the;model. Using analytical arguments, exploiting various symmetries of the;model, and applying arguments of adiabatic continuity from two exactly;solvable points of the model, we are also able to prove several results;regarding the structure of the low-lying entanglement eigenvalues. DOI:;10.1103/PhysRevB.86.224422;11;0;1;0;12;1098-0121;WOS:000312831900002;;;J;L'vov, Victor S.;Nazarenko, Sergey V.;Comment on "Symmetry of Kelvin-wave dynamics and the Kelvin-wave cascade;in the T=0 superfluid turbulence";PHYSICAL REVIEW B;86;22;226501;10.1103/PhysRevB.86.226501;DEC 27 2012;2012;We comment on the paper by Sonin [Phys. Rev. B 85, 104516 (2012)] with;most statements of which we disagree. We use this option to shed light;on some important issues of a theory of Kelvin-wave turbulence, touched;on in Sonin's paper, in particular, on the relation between the Vinen;spectrum of strong and the L'vov-Nazarenko spectrum of weak turbulence;of Kelvin waves. We also discuss the role of explicit calculation of the;Kelvin-wave interaction Hamiltonian and "symmetry arguments" that have;to resolve a contradiction between the Kozik-Svistunov and the;L'vov-Nazarenko spectrum of weak turbulence of Kelvin waves. DOI:;10.1103/PhysRevB.86.226501;5;1;0;0;5;1098-0121;WOS:000312831900003;;;J;Misguich, G.;Schwinger boson mean-field theory: Numerics for the energy landscape and;gauge excitations in two-dimensional antiferromagnets;PHYSICAL REVIEW B;86;24;245132;10.1103/PhysRevB.86.245132;DEC 27 2012;2012;We perform some systematic numerical search for Schwinger boson;mean-field states on square and triangular clusters. We look for;possible inhomogeneous ground states as well as low-energy excited;saddle points. The spectrum of the Hessian is also computed for each;solution. On the square lattice, we find gapless U(1) gauge modes in the;nonmagnetic phase. In the Z(2) liquid phase of the triangular lattice,;we identify the topological degeneracy as well as vison states.;DOI:10.1103/PhysRevB.86.245132;2;0;0;0;2;1098-0121;WOS:000312833600001;;;J;Mokhlespour, Salman;Haverkort, J. E. M.;Slepyan, Gregory;Maksimenko, Sergey;Hoffmann, A.;Collective spontaneous emission in coupled quantum dots: Physical;mechanism of quantum nanoantenna;PHYSICAL REVIEW B;86;24;245322;10.1103/PhysRevB.86.245322;DEC 27 2012;2012;We investigate the collective spontaneous emission in a system of two;identical quantum dots (QDs) strongly coupled through the dipole-dipole;(d-d) interaction. The QDs are modeled as two-level quantum objects,;while the d-d interaction is described as the exchange of a virtual;photon through the photonic reservoir. The master equation approach is;used in the analysis. The main attention is focused on antenna;characteristics of the two-QD system-the radiation intensity dependence;on the meridian and azimuthal angles of observation. We show that the;radiation pattern of such a system is nonstationary and its temporal;behavior depends on the initial quantum state. In particular, for;entangled initial states the radiative pattern exhibits oscillations on;the frequency which corresponds to the d-d interaction energy. We also;analyze spectral properties of the directional diagram. The comparison;of radiation patterns is carried out for two QDs and two classical;dipoles. The concept of quantum nanoantenna is proposed based on;collective spontaneous emission in QD ensembles.;DOI:10.1103/PhysRevB.86.245322;Maksimenko, Sergey/F-1888-2011;Maksimenko, Sergey/0000-0002-8271-0449;8;1;0;0;8;1098-0121;WOS:000312833600002;;;J;Muravev, V. M.;Gusikhin, P. A.;Tsydynzhapov, G. E.;Fortunatov, A. A.;Kukushkin, I. V.;Spectroscopy of terahertz radiation using high-Q photonic crystal;microcavities;PHYSICAL REVIEW B;86;23;235144;10.1103/PhysRevB.86.235144;DEC 27 2012;2012;We report observation of high-Q resonance in the photoresponse of a;detector embedded in the 2D photonic crystal slab (PCS) microcavity;illuminated by terahertz radiation. The detector and PCS are fabricated;from a single GaAs wafer in a unified process. The influence of the;period of PCS lattice, microcavity geometry, and detector location on;the resonant photoresponse is studied. The resonance is found to;originate from coupling of the fundamental PCS microcavity photon mode;to the detector. The phenomenon can be exploited to devise a;spectrometer-on-a-chip for terahertz range. DOI:;10.1103/PhysRevB.86.235144 PACS number(s): 42.50.-p, 42.70.Qs, 42.79.-e,;73.21.-b;0;0;0;0;0;1098-0121;WOS:000312832900001;;;J;Reguzzoni, M.;Fasolino, A.;Molinari, E.;Righi, M. C.;Potential energy surface for graphene on graphene: Ab initio derivation,;analytical description, and microscopic interpretation;PHYSICAL REVIEW B;86;24;245434;10.1103/PhysRevB.86.245434;DEC 27 2012;2012;We derive an analytical expression that describes the interaction energy;between two graphene layers identically oriented as a function of the;relative lateral and vertical positions, in excellent agreement with;first principles calculations. Thanks to its formal simplicity, the;proposed model allows for an immediate interpretation of the;interactions, in particular of the potential corrugation. This last;quantity plays a crucial role in determining the intrinsic resistance to;interlayer sliding and its increase upon compression influences the;frictional behavior under load. We show that, for these weakly adherent;layers, the corrugation possesses the same nature and z dependence of;Pauli repulsion. We investigate the microscopic origin of these;phenomena by analyzing the electronic charge distribution: We observe a;pressure-induced charge transfer from the interlayer region toward the;near-layer regions, with a much more consistent depletion of charge;occurring for the AA stacking than for the AB stacking of the two;layers. DOI:10.1103/PhysRevB.86.245434;8;0;0;0;8;1098-0121;WOS:000312833600003;;;J;Sonin, E. B.;Reply to "Comment on 'Symmetry of Kelvin-wave dynamics and the;Kelvin-wave cascade in the T=0 superfluid turbulence'";PHYSICAL REVIEW B;86;22;226502;10.1103/PhysRevB.86.226502;DEC 27 2012;2012;The goal of the Comment by L'vov and Nazarenko is to refute my;perviously published criticism of their mechanism of the Kelvin-wave;cascade. It is important, however, that, in their Comment, L'vov and;Nazarenko admitted that the Hamiltonian, from which they derived their;mechanism, is not tilt invariant. This provides full ammunition to their;critics, who believe that their mechanism is in conflict with the tilt;symmetry of the Kelvin-wave dynamics and, therefore, is not valid for;the real isotropic world. DOI: 10.1103/PhysRevB.86.226502;3;1;0;0;3;1098-0121;WOS:000312831900004;;;J;Swaminathan, Narasimhan;Morgan, Dane;Szlufarska, Izabela;Role of recombination kinetics and grain size in radiation-induced;amorphization;PHYSICAL REVIEW B;86;21;214110;10.1103/PhysRevB.86.214110;DEC 27 2012;2012;Using a rate theory model for a generic one-component material, we;investigated interactions between grain size and recombination kinetics;of radiation-induced defects. Specifically, by varying parametrically;nondimensional kinetic barriers for defect diffusion and recombination,;we determined the effect of these parameters on the shape of the dose to;amorphization versus temperature curves. We found that whether grain;refinement to the nanometer regime improves or deteriorates radiation;resistance of a material depends on the barriers to defect migration and;recombination, as well as on the temperature for the intended use of the;material. We show that the effects of recombination barriers and of;grain refinement can be coupled to each other to produce a phenomenon of;interstitial starvation. In interstitial starvation, a significant;number of interstitials annihilate at the grain boundary, leaving behind;unrecombined vacancies, which in turn amorphize the material. The same;rate theory model with material-specific parameters was used to predict;the grain-size dependence of the critical amorphization temperature in;SiC. Parameters for the SiC model were taken from ab initio;calculations. We find that the fine-grained SiC has a lower radiation;resistance when compared to the polycrystalline SiC due to the presence;of high-energy barrier for recombination of carbon Frenkel pairs and due;to the interstitial starvation phenomenon. DOI:;10.1103/PhysRevB.86.214110;Morgan, Dane/B-7972-2008;Morgan, Dane/0000-0002-4911-0046;5;0;0;0;5;1098-0121;WOS:000312830600001;;;J;Ahart, Muhtar;Sinogeikin, Stanislav;Shebanova, Olga;Ikuta, Daijo;Ye, Zuo-Guang;Mao, Ho-kwang;Cohen, R. E.;Hemley, Russell J.;Pressure dependence of the monoclinic phase in;(1-x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) solid solutions;PHYSICAL REVIEW B;86;22;224111;10.1103/PhysRevB.86.224111;DEC 26 2012;2012;We combine high-pressure x-ray diffraction, high-pressure Raman;scattering, and optical microscopy to investigate a series of (1 -;x)Pb(Mg1/3Nb2/3)O-3-xPbTiO(3) (PMN-xPT) solid solutions (x = 0.2, 0.3,;0.33, 0.35, 0.37, 0.4) in diamond anvil cells up to 20 GPa at 300 K. The;Raman spectra show a peak centered at 380 cm(-1) starting above 6 GPa;for all samples, in agreement with previous observations. X-ray;diffraction measurements are consistent with this spectral change;indicating a structural phase transition; we find that the triplet at;the pseudocubic (220) Bragg peak merges into a doublet above 6 GPa. Our;results indicate that the morphotropic phase boundary region (x = 0.33 -;0.37) with the presence of monoclinic symmetry persists up to 7 GPa. The;pressure dependence of ferroelectric domains in PMN-0.32PT single;crystals was observed using a polarizing optical microscope. The domain;wall density decreases with pressure and the domains disappear at a;modest pressure of 3 GPa. We propose a pressure-composition phase;diagram for PMN-xPT solid solutions. DOI: 10.1103/PhysRevB.86.224111;Cohen, Ronald/B-3784-2010;Cohen, Ronald/0000-0001-5871-2359;2;0;0;0;2;1098-0121;WOS:000312831800006;;;J;Akrap, Ana;Tran, Michael;Ubaldini, Alberto;Teyssier, Jeremie;Giannini, Enrico;van der Marel, Dirk;Lerch, Philippe;Homes, Christopher C.;Optical properties of Bi2Te2Se at ambient and high pressures;PHYSICAL REVIEW B;86;23;235207;10.1103/PhysRevB.86.235207;DEC 26 2012;2012;The temperature dependence of the complex optical properties of the;three-dimensional topological insulator Bi2Te2Se is reported for light;polarized in the a-b planes at ambient pressure, as well as the effects;of pressure at room temperature. This material displays a semiconducting;character with a bulk optical gap of E-g similar or equal to 300 meV at;295 K. In addition to the two expected infrared-active vibrations;observed in the planes, there is an additional fine structure that is;attributed to either the removal of degeneracy or the activation of;Raman modes due to disorder. A strong impurity band located at similar;or equal to 200 cm(-1) is also observed. At and just above the optical;gap, several interband absorptions are found to show a strong;temperature and pressure dependence. As the temperature is lowered these;features increase in strength and harden. The application of pressure;leads to a very abrupt closing of the gap above 8 GPa, and strongly;modifies the interband absorptions in the midinfrared spectral range.;While ab initio calculations fail to predict the collapse of the gap,;they do successfully describe the size of the band gap at ambient;pressure, and the magnitude and shape of the optical conductivity. DOI:;10.1103/PhysRevB.86.235207;Teyssier, Jeremie/A-6867-2013; Akrap, Ana/G-1409-2013;Akrap, Ana/0000-0003-4493-5273;10;0;0;0;10;1098-0121;WOS:000312832600007;;;J;Andersen, Kirsten;Jacobsen, Karsten W.;Thygesen, Kristian S.;Spatially resolved quantum plasmon modes in metallic nano-films from;first-principles;PHYSICAL REVIEW B;86;24;245129;10.1103/PhysRevB.86.245129;DEC 26 2012;2012;Electron energy loss spectroscopy (EELS) can be used to probe plasmon;excitations in nanostructured materials with atomic-scale spatial;resolution. For structures smaller than a few nanometers, quantum;effects are expected to be important, limiting the validity of widely;used semiclassical response models. Here we present a method to identify;and compute spatially resolved plasmon modes from first-principles based;on a spectral analysis of the dynamical dielectric function. As an;example we calculate the plasmon modes of 0.5 to 4 nm thick Na films and;find that they can be classified as (conventional) surface modes,;subsurface modes, and a discrete set of bulk modes resembling standing;waves across the film. We find clear effects of both quantum confinement;and nonlocal response. The quantum plasmon modes provide an intuitive;picture of collective excitations of confined electron systems and offer;a clear interpretation of spatially resolved EELS spectra. DOI:;10.1103/PhysRevB.86.245129;Jacobsen, Karsten/B-3602-2009; Thygesen, Kristian /B-1062-2011;6;0;0;0;6;1098-0121;WOS:000312833400007;;;J;Baker, A. M. R.;Alexander-Webber, J. A.;Altebaeumer, T.;Janssen, T. J. B. M.;Tzalenchuk, A.;Lara-Avila, S.;Kubatkin, S.;Yakimova, R.;Lin, C. -T.;Li, L. -J.;Nicholas, R. J.;Weak localization scattering lengths in epitaxial, and CVD graphene;PHYSICAL REVIEW B;86;23;235441;10.1103/PhysRevB.86.235441;DEC 26 2012;2012;Weak localization in graphene is studied as a function of carrier;density in the range from 1 x 10(11) cm(-2) to 1.43 x 10(13) cm(-2);using devices produced by epitaxial growth onto SiC and CVD growth on;thin metal film. The magnetic field dependent weak localization is found;to be well fitted by theory, which is then used to analyze the;dependence of the scattering lengths L-phi, L-i, and L-* on carrier;density. We find no significant carrier dependence for L-phi, a weak;decrease for L-i with increasing carrier density just beyond a large;standard error, and a n(-1/4) dependence for L-*. We demonstrate that;currents as low as 0.01 nA are required in smaller devices to avoid;hot-electron artifacts in measurements of the quantum corrections to;conductivity. DOI: 10.1103/PhysRevB.86.235441;Lara-Avila, Samuel/B-4878-2013; Lin, Cheng-Te/D-5203-2011; Materials, Semiconductor/I-6323-2013;Lara-Avila, Samuel/0000-0002-8331-718X; Lin,;Cheng-Te/0000-0002-7090-9610;;11;0;0;0;11;1098-0121;WOS:000312832600015;;;J;Bergeret, F. S.;Verso, A.;Volkov, A. F.;Electronic transport through ferromagnetic and superconducting junctions;with spin-filter tunneling barriers;PHYSICAL REVIEW B;86;21;214516;10.1103/PhysRevB.86.214516;DEC 26 2012;2012;We present a theoretical study of the quasiparticle and subgap;conductance of generic X/I-sf/S-M junctions with a spin-filter barrier;I-sf, where X is either a normal N or a ferromagnetic metal F and S-M is;a superconductor with a built-in exchange field. Our study is based on;the tunneling Hamiltonian and the Green's-function technique. First, we;focus on the quasiparticle transport, both above and below the;superconducting critical temperature. We obtain a general expression for;the tunneling conductance which is valid for arbitrary values of the;exchange field and arbitrary magnetization directions in the electrodes;and in the spin-filter barrier. In the second part, we consider the;subgap conductance of a N/I-sf/S junction, where S is a conventional;superconductor. In order to account for the spin-filter effect at;interfaces, we heuristically derive boundary conditions for the;quasiclassical Green's functions. With the help of these boundary;conditions, we show that the proximity effect and the subgap conductance;are suppressed by spin filtering in a N/I-sf/S junction. Our work;provides useful tools for the study of spin-polarized transport in;hybrid structures both in the normal and in the superconducting state.;DOI: 10.1103/PhysRevB.86.214516;CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;7;1;0;0;7;1098-0121;WOS:000312830400009;;;J;Beugnot, Jean-Charles;Laude, Vincent;Electrostriction and guidance of acoustic phonons in optical fibers;PHYSICAL REVIEW B;86;22;224304;10.1103/PhysRevB.86.224304;DEC 26 2012;2012;We investigate the generation of acoustic phonons in optical fibers via;electrostriction from coherent optical waves. Solving the elastodynamic;equation subject to the electrostrictive force, we are able to reproduce;the experimental spectra found in standard and photonic crystal fibers.;We discuss the two important practical cases of forward interaction,;dominated by elastic resonances of the fiber, and backward interaction,;for which an efficient mechanism of phonon guidance is found. The last;result describes the formation of the coherent phonon beam involved in;stimulated Brillouin scattering. DOI: 10.1103/PhysRevB.86.224304;Laude, Vincent/C-4484-2008;Laude, Vincent/0000-0001-8930-8797;3;0;0;0;3;1098-0121;WOS:000312831800007;;;J;Blanc, Nils;Coraux, Johann;Vo-Van, Chi;N'Diaye, Alpha T.;Geaymond, Olivier;Renaud, Gilles;Local deformations and incommensurability of high-quality epitaxial;graphene on a weakly interacting transition metal;PHYSICAL REVIEW B;86;23;235439;10.1103/PhysRevB.86.235439;DEC 26 2012;2012;We investigate the fine structure of graphene on iridium, which is a;model for graphene weakly interacting with a transition-metal substrate.;Even the highest-quality epitaxial graphene displays tiny imperfections,;i.e., small biaxial strains of similar to 0.3%, rotations of similar to;0.5 degrees, and shears over distances of similar to 100 nm, and is;found incommensurate, as revealed by x-ray diffraction and scanning;tunneling microscopy. These structural variations are mostly induced by;the increase of the lattice parameter mismatch when cooling the sample;from the graphene preparation temperature to the measurement;temperature. Although graphene weakly interacts with iridium, its;thermal expansion is found to be positive, contrary to free-standing;graphene. The structure of graphene and its variations is very sensitive;to the preparation conditions. All these effects are consistent with;initial growth and subsequent pinning of graphene at steps. DOI:;10.1103/PhysRevB.86.235439;Coraux, Johann/A-7897-2008;5;0;0;0;5;1098-0121;WOS:000312832600013;;;J;Blomeier, S.;Candeloro, P.;Hillebrands, B.;Reuscher, B.;Brodyanski, A.;Kopnarski, M.;Micromagnetism and magnetization reversal of embedded ferromagnetic;elements (vol 74, 184405, 2006);PHYSICAL REVIEW B;86;21;219904;10.1103/PhysRevB.86.219904;DEC 26 2012;2012;Hillebrands, Burkard/C-6242-2008;Hillebrands, Burkard/0000-0001-8910-0355;0;0;0;0;0;1098-0121;WOS:000312830400011;;;J;Bud'ko, Sergey L.;Liu, Yong;Lograsso, Thomas A.;Canfield, Paul C.;Hydrostatic and uniaxial pressure dependence of superconducting;transition temperature of KFe2As2 single crystals;PHYSICAL REVIEW B;86;22;224514;10.1103/PhysRevB.86.224514;DEC 26 2012;2012;We present heat capacity, c-axis thermal expansion and;pressure-dependent, low-field, temperature-dependent magnetization for;pressures up to similar to 12 kbar, data for KFe2As2 single crystals.;T-c decreases under pressure with dT(c)/dP approximate to -0.10 K/kbar.;The inferred uniaxial, c-axis, pressure derivative is positive,;dT(c)/dp(c) approximate to 0.11 K/kbar. The data are analyzed in;comparison with those for overdoped Fe-based superconductors. Arguments;are presented that superconductivity in KFe2As2 may be different from;the other overdoped, Fe-based materials in the 122 family. DOI:;10.1103/PhysRevB.86.224514;Canfield, Paul/H-2698-2014;9;0;0;0;9;1098-0121;WOS:000312831800013;;;J;Bulaevskii, Lev N.;Lin, Shi-Zeng;Self-induced pinning of vortices in the presence of ac driving force in;magnetic superconductors;PHYSICAL REVIEW B;86;22;224513;10.1103/PhysRevB.86.224513;DEC 26 2012;2012;We derive the response of the magnetic superconductors in the vortex;state to the ac Lorentz force, F-L (t) = F-ac sin(omega t), taking into;account the interaction of vortices with the magnetic moments described;by the relaxation dynamics (polaronic effect). At low amplitudes of the;driving force F-ac the dissipation in the system is suppressed due to;the enhancement of the effective viscosity at low frequencies and due to;formation of the magnetic pinning at high frequencies omega. In the;adiabatic limit with low frequencies omega and high amplitude of the;driving force F-ac, the vortex and magnetic polarization form a vortex;polaron when F-L (t) is small. When F-L increases, the vortex polaron;accelerates and at a threshold driving force, the vortex polaron;dissociates and the motion of vortex and the relaxation of magnetization;are decoupled. When F-L decreases, the vortex is retrapped by the;background of remnant magnetization and they again form vortex polaron.;This process repeats when F-L (t) increases in the opposite direction.;Remarkably, after dissociation, decoupled vortices move in the periodic;potential induced by magnetization which remains for some periods of;time due to retardation after the decoupling. At this stage vortices;oscillate with high frequencies determined by the Lorentz force at the;moment of dissociation. We derive also the creep rate of vortices and;show that magnetic moments suppress creep rate. DOI:;10.1103/PhysRevB.86.224513;Lin, Shi-Zeng/B-2906-2008;Lin, Shi-Zeng/0000-0002-4368-5244;3;0;0;0;3;1098-0121;WOS:000312831800012;;;J;Butler, C. A. M.;Hobson, P. A.;Hibbins, A. P.;Sambles, J. R.;Resonant microwave transmission from a double layer of subwavelength;metal square arrays: Evanescent handedness;PHYSICAL REVIEW B;86;24;241109;10.1103/PhysRevB.86.241109;DEC 26 2012;2012;Adouble layer of identical subwavelengthmetal patch arrays is;experimentally shown to be electromagnetically chiral due to the;evanescent coupling of the near fields between nonchiral layers-it;exhibits "evanescent handedness." Despite each layer being intrinsically;isotropic in the plane with four mirror planes orthogonal to the plane;of the structure, circular dichroism, leading to significant;polarization rotation, is found in the resonant microwave transmission;for any incident linear polarization. DOI: 10.1103/PhysRevB.86.241109;1;0;0;0;1;1098-0121;WOS:000312833400002;;;J;Calder, S.;Cao, G. -X.;Lumsden, M. D.;Kim, J. W.;Gai, Z.;Sales, B. C.;Mandrus, D.;Christianson, A. D.;Magnetic structural change of Sr2IrO4 upon Mn doping;PHYSICAL REVIEW B;86;22;220403;10.1103/PhysRevB.86.220403;DEC 26 2012;2012;The layered 5d transition-metal oxide Sr2IrO4 has been shown to host a;novel J(eff) = 1/2 Mott spin-orbit insulating state with;antiferromagnetic ordering, leading to comparisons with the layered;cuprates. Here we study the effect of substituting Mn for Ir in single;crystals of Sr2Ir0.9Mn0.1O4 through an investigation involving bulk;measurements and resonant x-ray and neutron scattering. We observe a new;long-range magnetic structure emerge upon doping through a reordering of;the spins from the basal plane to the c axis with a reduced ordering;temperature compared to Sr2IrO4 . The strong enhancement of the magnetic;x-ray scattering intensity at the L-3 edge relative to the L-2 edge;indicates that the J(eff) = 1/2 state is robust and capable of hosting a;variety of ground states. DOI: 10.1103/PhysRevB.86.220403;Gai, Zheng/B-5327-2012; Mandrus, David/H-3090-2014;Gai, Zheng/0000-0002-6099-4559;;9;1;0;0;9;1098-0121;WOS:000312831800002;;;J;Camjayi, Alberto;Arrachea, Liliana;Conductance of a quantum dot in the Kondo regime connected to dirty;wires;PHYSICAL REVIEW B;86;23;235143;10.1103/PhysRevB.86.235143;DEC 26 2012;2012;We study the transport behavior induced by a small bias voltage through;a quantum dot connected to one-channel disordered wires by means of a;quantum Monte Carlo method. We model the quantum dot by the;Hubbard-Anderson impurity and the wires by the one-dimensional Anderson;model with diagonal disorder within a length. We present a complete;description of the probability distribution function of the conductance;within the Kondo regime. DOI: 10.1103/PhysRevB.86.235143;1;0;0;0;1;1098-0121;WOS:000312832600005;;;J;Chen, Ying;Liu, Rui;Cai, Min;Shinar, Ruth;Shinar, Joseph;Extremely strong room-temperature transient photocurrent-detected;magnetic resonance in organic devices;PHYSICAL REVIEW B;86;23;235442;10.1103/PhysRevB.86.235442;DEC 26 2012;2012;An extremely strong room-temperature photocurrent- (PC- or I-PC-);detected magnetic resonance (PCDMR) that elucidates transport and;trapping phenomena in organic devices, in particular solar cells, is;described. When monitoring the transient PCDMR in indium tin oxide;(ITO)/poly(2-methoxy-5-(2'-ethyl)-hexoxy-1,4-phenylenevinylene);(MEH-PPV)/Al devices, where the MEH-PPV film was baked overnight at 100;degrees C in O-2, it is observed that | Delta I-PC/I-PC| peaks at values;>> 1, where Delta I-PC is the change in I-PC induced by magnetic;resonance conditions. Importantly, Delta I-PC and I-PC are of different;origin. The mechanism most likely responsible for this effect is the;spin-dependent formation of spinless bipolarons adjacent to negatively;charged deep traps, apparently induced in particular by oxygen centers,;to form trions. DOI: 10.1103/PhysRevB.86.235442;Cai, Min/A-2678-2014;1;0;0;0;1;1098-0121;WOS:000312832600016;;;J;Cho, Gil Young;Bardarson, Jens H.;Lu, Yuan-Ming;Moore, Joel E.;Superconductivity of doped Weyl semimetals: Finite-momentum pairing and;electronic analog of the He-3-A phase;PHYSICAL REVIEW B;86;21;214514;10.1103/PhysRevB.86.214514;DEC 26 2012;2012;We study superconducting states of doped inversion-symmetric Weyl;semimetals. Specifically, we consider a lattice model realizing a Weyl;semimetal with an inversion symmetry and study the superconducting;instability in the presence of a short-ranged attractive interaction.;With a phonon-mediated attractive interaction, we find two competing;states: a fully gapped finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov;pairing state and a nodal even-parity pairing state. We show that, in a;BCS-type approximation, the finite-momentum pairing state is;energetically favored over the usual even-parity paired state and is;robust against weak disorder. Although energetically unfavorable, the;even-parity pairing state provides an electronic analog of the He-3-A;phase in that the nodes of the even-parity state carry nontrivial;winding numbers and therefore support a surface flat band. We briefly;discuss other possible superconducting states that may be realized in;Weyl semimetals. DOI: 10.1103/PhysRevB.86.214514;12;0;0;0;12;1098-0121;WOS:000312830400007;;;J;Duivenvoorden, Kasper;Quella, Thomas;Discriminating string order parameter for topological phases of gapped;SU(N) spin chains;PHYSICAL REVIEW B;86;23;235142;10.1103/PhysRevB.86.235142;DEC 26 2012;2012;One-dimensional gapped spin chains with symmetry PSU(N) = SU(N)/Z(N) are;known to possess N different topological phases. In this paper, we;introduce a nonlocal string order parameter which characterizes each of;these N phases unambiguously. Numerics confirm that our order parameter;allows one to extract a quantized topological invariant from a given;nondegenerate gapped ground state wave function. Discontinuous jumps in;the discrete topological order that arise when varying physical;couplings in the Hamiltonian may be used to detect quantum phase;transitions between different topological phases. DOI:;10.1103/PhysRevB.86.235142;Quella, Thomas/A-2630-2012;Quella, Thomas/0000-0002-5441-4124;6;0;0;0;6;1098-0121;WOS:000312832600004;;;J;Gao Xianlong;Chen, A-Hai;Tokatly, I. V.;Kurth, S.;Lattice density functional theory at finite temperature with strongly;density-dependent exchange-correlation potentials;PHYSICAL REVIEW B;86;23;235139;10.1103/PhysRevB.86.235139;DEC 26 2012;2012;The derivative discontinuity of the exchange-correlation (xc) energy at;an integer particle number is a property of the exact, unknown xc;functional of density functional theory (DFT) which is absent in many;popular local and semilocal approximations. In lattice DFT,;approximations exist which exhibit a discontinuity in the xc potential;at half-filling. However, due to convergence problems of the Kohn-Sham;(KS) self-consistency cycle, the use of these functionals is mostly;restricted to situations where the local density is away from;half-filling. Here a numerical scheme for the self-consistent solution;of the lattice KS Hamiltonian with a local xc potential with rapid (or;quasidiscontinuous) density dependence is suggested. The problem is;formulated in terms of finite-temperature DFT where the discontinuity in;the xc potential emerges naturally in the limit of zero temperature. A;simple parametrization is suggested for the xc potential of the uniform;one-dimensional (1D) Hubbard model at finite temperature which is;obtained from the solution of the thermodynamic Bethe ansatz. The;feasibility of the numerical scheme is demonstrated by application to a;model of fermionic atoms in a harmonic trap. The corresponding density;profile exhibits a plateau of integer occupation at low temperatures;which melts away for higher temperatures. DOI:;10.1103/PhysRevB.86.235139;Tokatly, Ilya/D-9554-2011; Chen, Ahai/D-6169-2013; Xianlong, Gao/K-8744-2012;Tokatly, Ilya/0000-0001-6288-0689; Xianlong, Gao/0000-0001-6914-3163;4;0;0;0;4;1098-0121;WOS:000312832600001;;;J;Hanson, George W.;Forati, Ebrahim;Linz, Whitney;Yakovlev, Alexander B.;Excitation of terahertz surface plasmons on graphene surfaces by an;elementary dipole and quantum emitter: Strong electrodynamic effect of;dielectric support;PHYSICAL REVIEW B;86;23;235440;10.1103/PhysRevB.86.235440;DEC 26 2012;2012;The excitation of transverse magnetic (TM) surface plasmons by a point;dipole in the vicinity of a multilayered graphene/dielectric system is;examined. It was previously shown that the surface plasmon (SP) excited;by a vertical dipole on an isolated graphene sheet exhibits a strong;excitation peak in the THz region; here we show that, in the presence of;a finite-thickness dielectric support layer such as SiO2, considerable;spectral content is transferred to a second (perturbed dielectric slab);mode, greatly decreasing and redshifting the excitation peak. The;presence of a Si half-space also diminishes the excitation strength, but;for graphene on top of SiO2-Si the presence of the SiO2 layer creates a;spacer restoring the excitation peak. A two-level quantum emitter is;also considered, where it is shown that the addition of a thin;dielectric support slab and SiO2-Si geometries affects the spontaneous;decay rate in a manner similar to the classical dipole SP excitation;peak. DOI: 10.1103/PhysRevB.86.235440;10;0;0;0;10;1098-0121;WOS:000312832600014;;;J;Hillier, N. J.;Foroozani, N.;Zocco, D. A.;Hamlin, J. J.;Baumbach, R. E.;Lum, I. K.;Maple, M. B.;Schilling, J. S.;Intrinsic dependence of T-c on hydrostatic (He-gas) pressure for;superconducting LaFePO, PrFePO, and NdFePO single crystals;PHYSICAL REVIEW B;86;21;214517;10.1103/PhysRevB.86.214517;DEC 26 2012;2012;Since their discovery in 2008, the Fe-based superconductors have;attracted a great deal of interest. Regrettably, themechanism(s);responsible for the superconductivity has yet to be unequivocally;identified. High pressure is an important variable since its application;moderates the pairing interaction. Thus far, the LnFePO (Ln = La, Pr,;Nd, Sm, Gd) family of superconductors has received relatively little;attention. Early high-pressure studies on LaFePO found that T-c;initially increased with pressure before passing through a maximum at;higher pressures. The present studies on both polycrystalline and;single-crystalline LaFePO, PrFePO, and NdFePO utilize the most;hydrostatic pressure medium available, i.e., dense He. Surprisingly, for;all samples, T-c is found to initially decrease rapidly with pressure at;the rate dT(c)/dP similar or equal to -2 to -3K/GPa. Less hydrostatic;pressure media thus appear to enhance the value of T-c in these;materials. These results give yet further evidence that the;superconducting state in Fe-based superconductors is extraordinarly;sensitive to lattice strain. DOI: 10.1103/PhysRevB.86.214517;Foroozani, Neda/H-2720-2013; Zocco, Diego/O-3440-2014;2;0;0;0;2;1098-0121;WOS:000312830400010;;;J;Hinuma, Yoyo;Oba, Fumiyasu;Kumagai, Yu;Tanaka, Isao;Ionization potentials of (112) and (11(2)over-bar) facet surfaces of;CuInSe2 and CuGaSe2;PHYSICAL REVIEW B;86;24;245433;10.1103/PhysRevB.86.245433;DEC 26 2012;2012;The ionization potentials of the faceted and nonfaceted (110) surfaces;of CuInSe2 (CIS) and CuGaSe2 (CGS), which are key components of;CuIn1-xGaxSe2 (CIGS) thin-film solar cells, are investigated using;first-principles calculations based on a hybrid Hartree-Fock density;functional theory approach. Slab models of the chalcopyrite (110);surface with both (112) and (11 (2) over bar) facets on each surface of;the slab are employed. Surface energy evaluations point out that two;types of faceted surfaces with point defects, namely a combination of;Cu-In (Cu-Ga) and In-Cu (Ga-Cu) antisites and a combination of Cu;vacancies and In-Cu (Ga-Cu) antisites, are the most stable depending on;the chemical potentials. The ionization potentials are evaluated with;two definitions: One highly sensitive to and the other less sensitive to;localized surface states. The latter varies by 0.4 eV in CIS and 0.5 eV;in CGS with the surface structure. The ionization potentials are reduced;by 0.2 eV for faceted surfaces with Cu-In (Cu-Ga) and In-Cu (Ga-Cu);antisites when the effects of the localized surface states are;considered. The values of both ionization potentials are similar between;CIS and CGS with a difference of about 0.1 eV for the most stable;surface structures. DOI: 10.1103/PhysRevB.86.245433;Kumagai, Yu/H-8104-2012; Tanaka, Isao/B-5941-2009; Oba, Fumiyasu/J-9723-2014;9;0;1;0;9;1098-0121;WOS:000312833400018;;;J;Hortamani, M.;Wiesendanger, R.;Role of hybridization in the Rashba splitting of noble metal monolayers;on W(110);PHYSICAL REVIEW B;86;23;235437;10.1103/PhysRevB.86.235437;DEC 26 2012;2012;In contradiction to the nature of the spin-orbit driven Rashba splitting;of surface states which increases with atomic number, Shikin et al.;[Phys. Rev. Lett. 100, 057601 (2008)] have observed that the size of the;splitting in Au overlayers on W(110) is smaller than for Ag overlayers.;In the framework of first-principle density functional theory, we have;studied the origin of the Rashba splitting at Au/Ag overlayers on the;W(110) surface. We show how the asymmetric behavior of the wave function;in the vicinity of the surface atom nucleus, in addition to the strength;of the nuclear potential gradient, plays a crucial role for the size of;the splitting. The influence of the electronic structure and spin;dependent hybridization on the Rashba splitting is discussed. The;asymmetric behavior of the surface wave function originates from the;surface-interface sp-d hybridization. We find that a spin dependent;hybridization in the Ag overlayer influences strongly the size of the;Rashba splitting. DOI: 10.1103/PhysRevB.86.235437;1;0;0;0;1;1098-0121;WOS:000312832600011;;;J;Hu, Xiang;Rueegg, Andreas;Fiete, Gregory A.;Topological phases in layered pyrochlore oxide thin films along the;[111] direction;PHYSICAL REVIEW B;86;23;235141;10.1103/PhysRevB.86.235141;DEC 26 2012;2012;We theoretically study a multiband Hubbard model of pyrochlore oxides of;the form A(2)B(2)O(7), where B is a heavy transition metal ion with;strong spin-orbit coupling, in a thin-film geometry orientated along the;[111] direction. Along this direction, the pyrochlore lattice consists;of alternating kagome and triangular lattice planes of B ions. We;consider a single kagome layer, a bilayer, and the two different;trilayers. As a function of the strength of the spin-orbit coupling, the;direct and indirect d-orbital hopping, and the band filling, we identify;a number of scenarios where a noninteracting time-reversal-invariant;Z(2) topological phase is expected and we suggest some candidate;materials. We study the interactions in the half-filled d shell within;Hartree-Fock theory and identify parameter regimes where a zero magnetic;field Chern insulator with Chern number +/- 1 can be found. The most;promising geometries for topological phases appear to be the bilayer;which supports both a Z(2) topological insulator and a Chern insulator,;and the triangular-kagome-triangular trilayer which supports a;relatively robust Chern insulator phase. DOI: 10.1103/PhysRevB.86.235141;Ruegg, Andreas/B-4498-2010;12;0;0;0;12;1098-0121;WOS:000312832600003;;;J;Janotti, A.;Bjaalie, L.;Gordon, L.;Van de Walle, C. G.;Controlling the density of the two-dimensional electron gas at the;SrTiO3/LaAlO3 interface;PHYSICAL REVIEW B;86;24;241108;10.1103/PhysRevB.86.241108;DEC 26 2012;2012;The polar discontinuity at the SrTiO3/LaAlO3 interface (STO/LAO) can in;principle sustain an electron density of 3.3 x 10(14) cm(-2) (0.5;electrons per unit cell). However, experimentally observed densities are;more than an order of magnitude lower. Using a combination of;first-principles and Schrodinger-Poisson simulations we show that the;problem lies in the asymmetric nature of the structure, i.e., the;inability to form a second LAO/STO interface that is a mirror image of;the first, or to fully passivate the LAO surface. Our insights apply to;oxide interfaces in general, explaining for instance why the;SrTiO3/GdTiO3 interface has been found to exhibit the full density of;3.3 x 10(14) cm(-2). DOI: 10.1103/PhysRevB.86.241108;Janotti, Anderson/F-1773-2011; Van de Walle, Chris/A-6623-2012;Janotti, Anderson/0000-0001-5028-8338; Van de Walle,;Chris/0000-0002-4212-5990;11;0;0;0;11;1098-0121;WOS:000312833400001;;;J;Kim, Changsoo;Jo, Euna;Kang, Byeongki;Kwon, Sangil;Lee, Soonchil;Shim, Jeong Hyun;Suzuki, Takehiko;Katsufuji, Takuro;Giant magnetic anisotropy in Mn3O4 investigated by Mn-55(2+) and;Mn-55(3+) NMR;PHYSICAL REVIEW B;86;22;224420;10.1103/PhysRevB.86.224420;DEC 26 2012;2012;In Mn3O4, the magnetization along the c axis is different from that;along the ab plane even in the strong field of 30 T. To investigate the;origin of the huge magnetic anisotropy, Mn2+ and Mn3+ nuclear magnetic;resonance spectra were measured in the 7-T magnetic field. The canting;angle of the magnetic moments was estimated for various directions of;field by rotating a single-crystalline Mn3O4 sample. One of the main;results is that Mn3+ moments lie nearly in the ab plane in the external;field perpendicular to the plane, meaning that the macroscopic magnetic;anisotropy of Mn3O4 originates from the magnetic anisotropy of Mn3+ in;the ab plane. The anisotropy field is estimated to be about 65 T. It is;obvious that the Yafet-Kittel structure made of Mn2+ and Mn3+ spins lies;in the ab plane due to this huge magnetic anisotropy, contrary to the;previous reports. By the least-squares fit of the canting angle data for;various field directions to a simple model, we obtained that J(BB) =;1.88J(AB) - 0.09 meV and K-A = -14.7J(AB) + 2.0 meV, where J(AB), J(BB),;and K-A are the exchange interaction constants between Mn2+ moments,;Mn2+ and Mn3+ moments, and an anisotropy constant of Mn2+, respectively.;DOI: 10.1103/PhysRevB.86.224420;Suzuki, Takehito/B-3038-2013; Lee, Soonchil/C-1963-2011;3;0;0;0;3;1098-0121;WOS:000312831800010;;;J;Kimber, Robin G. E.;Wright, Edward N.;O'Kane, Simon E. J.;Walker, Alison B.;Blakesley, James C.;Mesoscopic kinetic Monte Carlo modeling of organic photovoltaic device;characteristics;PHYSICAL REVIEW B;86;23;235206;10.1103/PhysRevB.86.235206;DEC 26 2012;2012;Measured mobility and current-voltage characteristics of single layer;and photovoltaic (PV) devices composed of;poly{9,9-dioctylfluorene-co-bis[N,N'-(4-butylphenyl)]bis(N,N'-phenyl-1,4;-phenylene)diamine} (PFB) and;poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) have been;reproduced by a mesoscopic model employing the kinetic Monte Carlo (KMC);approach. Our aim is to show how to avoid the uncertainties common in;electrical transport models arising from the need to fit a large number;of parameters when little information is available, for example, a;single current-voltage curve. Here, simulation parameters are derived;from a series of measurements using a self-consistent "building-blocks";approach, starting from data on the simplest systems. We found that site;energies show disorder and that correlations in the site energies and a;distribution of deep traps must be included in order to reproduce;measured charge mobility-field curves at low charge densities in bulk;PFB and F8BT. The parameter set from the mobility-field curves;reproduces the unipolar current in single layers of PFB and F8BT and;allows us to deduce charge injection barriers. Finally, by combining;these disorder descriptions and injection barriers with an optical;model, the external quantum efficiency and current densities of blend;and bilayer organic PV devices can be successfully reproduced across a;voltage range encompassing reverse and forward bias, with the;recombination rate the only parameter to be fitted, found to be 1 x;10(7) s(-1). These findings demonstrate an approach that removes some of;the arbitrariness present in transport models of organic devices, which;validates the KMC as an accurate description of organic optoelectronic;systems, and provides information on the microscopic origins of the;device behavior. DOI: 10.1103PhysRevB.86.235206;20;0;1;0;20;1098-0121;WOS:000312832600006;;;J;Kishine, Jun-ichiro;Bostrem, I. G.;Ovchinnikov, A. S.;Sinitsyn, Vl. E.;Coherent sliding dynamics and spin motive force driven by crossed;magnetic fields in a chiral helimagnet;PHYSICAL REVIEW B;86;21;214426;10.1103/PhysRevB.86.214426;DEC 26 2012;2012;We demonstrate that the chiral soliton lattice formed from a chiral;helimagnet exhibits a coherent sliding motion when a time-dependent;magnetic field is applied parallel to the helical axis, in addition to a;static field perpendicular to the helical axis. To describe the coherent;sliding, we use the collective coordinate method and a numerical;analysis. We also show that the time-dependent sliding velocity causes a;time-varying Berry cap which creates a spin motive force. A salient;feature of the chiral soliton lattice is the appearance of a strongly;amplified spin motive force which is directly proportional to the;macroscopic number of solitons (magnetic kinks). DOI:;10.1103/PhysRevB.86.214426;2;0;0;0;2;1098-0121;WOS:000312830400005;;;J;Kratzer, M.;Rubezhanska, M.;Prehal, C.;Beinik, I.;Kondratenko, S. V.;Kozyrev, Yu N.;Teichert, C.;Electrical and photovoltaic properties of self-assembled Ge nanodomes on;Si(001);PHYSICAL REVIEW B;86;24;245320;10.1103/PhysRevB.86.245320;DEC 26 2012;2012;SiGe nano-size islands play a key role in novel electronic and;optoelectronic devices. Therefore, the understanding of basic electrical;properties of individual nanoislands is crucial. Here, the electrical;and photovoltaic properties of individual self-assembled Ge nanodomes;(NDs) on Si(001) have been studied by conductive and photoconductive;atomic force microscopy (AFM). The transition areas between the {113};and {15 3 23} facets turned out to be most conductive whereas the {113};facets exhibit minimum conductivity, which is attributed to a local;increase in Si concentration. Local current-to-voltage measurements;revealed that the NDs show an ohmic resistance, which is in the M Omega;region and scales with the ND-substrate interface area. Upon;illumination by the AFM feedback laser at 860 nm, a photovoltage is;generated. This photovoltage originates in the p-i-n structure formed;between the p-type substrate, the Ge ND, and the n-type diamond AFM;probe. DOI: 10.1103/PhysRevB.86.245320;Teichert, Christian/F-1003-2013;3;0;0;0;3;1098-0121;WOS:000312833400010;;;J;Kudasov, Yu. B.;Maslov, D. A.;Frustration and charge order in LuFe2O4;PHYSICAL REVIEW B;86;21;214427;10.1103/PhysRevB.86.214427;DEC 26 2012;2012;The nature of a transition from two-to three-dimensional charge order;(2D-CO -> 3D-CO) in the multiferroic material LuFe2O4 is discussed. It;is shown that a high-temperature ordered phase of the Ising model with;antiferromagnetic or antiferroelectric (AF) interactions on a triangular;bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which;is a generalization of a well-known partially disordered AF structure;for the triangular lattice. The DPDA state is stable against a variation;of interaction parameters in a wide range. It is demonstrated that the;transition of W layers to the DPDA state gives rise to the 2D-CO phase;in LuFe2O4 at a high temperature. DOI: 10.1103/PhysRevB.86.214427;1;1;0;0;1;1098-0121;WOS:000312830400006;;;J;Lee, Janghee;Park, Joonbum;Lee, Jae-Hyeong;Kim, Jun Sung;Lee, Hu-Jong;Gate-tuned differentiation of surface-conducting states in;Bi1.5Sb0.5Te1.7Se1.3 topological-insulator thin crystals;PHYSICAL REVIEW B;86;24;245321;10.1103/PhysRevB.86.245321;DEC 26 2012;2012;Using field-angle, temperature, and back-gate-voltage dependence of the;weak antilocalization (WAL) and universal conductance fluctuations of;thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in;combination with gate-tuned Hall resistivity measurements, we reliably;separated the surface conduction of the topological nature from both the;bulk conduction and topologically trivial surface conduction. We;minimized the bulk conduction in the crystals and back-gate tuned the;Fermi level to the topological bottom-surface band while keeping the top;surface insensitive to back-gating with the optimal crystal thickness of;similar to 100 nm. We argue that the WAL effect occurring by the;coherent diffusive motion of carriers in relatively low magnetic fields;is more essential than other transport tools such as the Shubnikov-de;Hass oscillations for confirming the conduction by the topologically;protected surface state. Our approach provides a highly coherent picture;of the surface transport properties of topological insulators and a;reliable means of investigating the fundamental topological nature of;surface conduction and possible quantum-device applications related to;momentum-locked spin polarization in surface states. DOI:;10.1103/PhysRevB.86.245321;Kim, Jun Sung/G-8861-2012; Lee, Janghee/E-7471-2013;Lee, Janghee/0000-0002-7398-9097;11;2;1;0;11;1098-0121;WOS:000312833400011;;;J;Lee, Soo-Yong;Lee, Hyun-Woo;Sim, H. -S.;Visibility recovery by strong interaction in an electronic Mach-Zehnder;interferometer;PHYSICAL REVIEW B;86;23;235444;10.1103/PhysRevB.86.235444;DEC 26 2012;2012;We study the evolution of a single-electron packet of Lorentzian shape;along an edge of the integer quantum Hall regime or in a Mach-Zehnder;interferometer, considering a capacitive Coulomb interaction and using a;bosonization approach. When the packet propagates along a chiral quantum;Hall edge, we find that its electron density profile becomes more;distorted from Lorentzian due to the generation of electron-hole;excitations, as the interaction strength increases yet stays in a;weak-interaction regime. However, as the interaction strength becomes;larger and enters a strong-interaction regime, the distortion becomes;weaker and eventually the Lorentzian packet shape is recovered. The;recovery of the packet shape leads to an interesting feature of the;interference visibility of the symmetric Mach-Zehnder interferometer;whose two arms have the same interaction strength. As the interaction;strength increases, the visibility decreases from the maximum value in;the weak-interaction regime and then increases to the maximum value in;the strong-interaction regime. We argue that this counterintuitive;result also occurs under other types of interactions. DOI:;10.1103/PhysRevB.86.235444;Lee, Hyun-Woo/B-8995-2008; Sim, Heung-Sun/C-1624-2011;Lee, Hyun-Woo/0000-0002-1648-8093;;1;0;0;0;1;1098-0121;WOS:000312832600018;;;J;Li, Qiuzi;Rossi, E.;Das Sarma, S.;Two-dimensional electronic transport on the surface of three-dimensional;topological insulators;PHYSICAL REVIEW B;86;23;235443;10.1103/PhysRevB.86.235443;DEC 26 2012;2012;We present a theoretical approach to describe the two-dimensional (2D);transport properties of the surfaces of three-dimensional topological;insulators (3DTIs) including disorder and phonon scattering effects. The;method that we present is able to take into account the effects of the;strong disorder-induced carrier density inhomogeneities that;characterize the ground state of the surfaces of 3DTIs, especially at;low doping, as recently shown experimentally. Due to the inhomogeneous;nature of the carrier density landscape, standard theoretical techniques;based on ensemble averaging over disorder assuming a spatially uniform;average carrier density are inadequate. Moreover the presence of strong;spatial potential and density fluctuations greatly enhances the effect;of thermally activated processes on the transport properties. The theory;presented is able to take into account all the effects due to the;disorder-induced inhomogeneities, momentum scattering by disorder, and;the effect of electron-phonon scattering processes. As a result the;developed theory is able to accurately describe the transport properties;of the surfaces of 3DTIs both at zero and finite temperature. DOI:;10.1103/PhysRevB.86.235443;Rossi, Enrico/K-2837-2012; Li, Qiuzi/F-6474-2011; Das Sarma, Sankar/B-2400-2009;Rossi, Enrico/0000-0002-2647-3610;;8;1;0;0;8;1098-0121;WOS:000312832600017;;;J;Liang, S. H.;Liu, D. P.;Tao, L. L.;Han, X. F.;Guo, Hong;Organic magnetic tunnel junctions: The role of metal-molecule interface;PHYSICAL REVIEW B;86;22;224419;10.1103/PhysRevB.86.224419;DEC 26 2012;2012;We report a first-principles theoretical investigation of spin-polarized;quantum transport in organic magnetic tunnel junctions (OMTJs) to;provide a microscopic understanding on the sign of the tunnel;magnetoresistance ratio (TMR). We consider two different OMTJs, formed;by sandwiching 1-stearic acid radicals (1-SAR) or 1,18-stearic diacid;radicals (1,18-SDR) between two Ni electrodes. Even though the main;difference between them is only on one of the Ni/molecule contacts, such;a structure difference is found to induce a significant sign change of;the TMR. The TMR is negative for 1-SAR at -19.6%, but is positive for;1,18-SDR at 13.7%. By investigating the concept of scattering density of;states (SDOS), we found that scattering processes of p electrons at the;Ni/molecule interface determines the sign of TMR. Based on spin;polarization of the SDOS, we extend the Julliere model to explain both;the sign and the value of the TMR qualitatively and semiquantitatively.;It is concluded that understanding spin-polarized quantum transport in;organic magnetic tunnel junction requires a comprehensive knowledge of;the electronic structures of the molecule, the metal electrode, and the;metal-molecule contacts. DOI: 10.1103/PhysRevB.86.224419;Guo, Hong/A-8084-2010;4;0;0;0;4;1098-0121;WOS:000312831800009;;;J;Liew, T. C. H.;Holographic arrays based on semiconductor microstructures;PHYSICAL REVIEW B;86;23;235314;10.1103/PhysRevB.86.235314;DEC 26 2012;2012;A concept of complex reflectivity modulation is proposed based on the;electrical control of quantum well exciton resonances that influence the;propagation of light in a layered semiconductor structure. By variation;in exciton energies, both the intensity and the phase of reflected light;can be fully controlled. Unlike previous devices, for full complex light;modulation, the design is based on a single device in a single;structure. The device allows complete 100% intensity contrast and allows;for the construction of small pixel sizes with fast response times. DOI:;10.1103/PhysRevB.86.235314;1;0;0;0;1;1098-0121;WOS:000312832600010;;;J;Lin, Chien-Hung;Sensarma, Rajdeep;Sengupta, K.;Sarma, S. Das;Quantum dynamics of disordered bosons in an optical lattice;PHYSICAL REVIEW B;86;21;214207;10.1103/PhysRevB.86.214207;DEC 26 2012;2012;We study the equilibrium and nonequilibrium properties of strongly;interacting bosons on a lattice in the presence of a random bounded;disorder potential. Using a Gutzwiller projected variational technique,;we study the equilibrium phase diagram of the disordered Bose-Hubbard;model and obtain the Mott insulator, Bose glass, and superfluid phases.;We also study the nonequilibrium response of the system under a periodic;temporal drive where, starting from the superfluid phase, the hopping;parameter is ramped down linearly in time, and back to its initial;value. We study the density of excitations created, the change in the;superfluid order parameter, and the energy pumped into the system in;this process as a function of the inverse ramp rate tau. For the clean;case the density of excitations goes to a constant, while the order;parameter and energy relax as 1/tau and 1/tau(2) respectively. With;disorder, the excitation density decays exponentially with t, with the;decay rate increasing with the disorder, to an asymptotic value;independent of the disorder. The energy and change in order parameter;also decrease as tau is increased. DOI: 10.1103/PhysRevB.86.214207;Das Sarma, Sankar/B-2400-2009;1;0;0;0;1;1098-0121;WOS:000312830400001;;;J;Luo, Yongkang;Bao, Jinke;Shen, Chenyi;Han, Jieke;Yang, Xiaojun;Lv, Chen;Li, Yuke;Jiao, Wenhe;Si, Bingqi;Feng, Chunmu;Dai, Jianhui;Cao, Guanghan;Xu, Zhu-An;Magnetism and crystalline electric field effect in ThCr2Si2-type;CeNi2As2;PHYSICAL REVIEW B;86;24;245130;10.1103/PhysRevB.86.245130;DEC 26 2012;2012;A millimeter-sized ThCr2Si2-type CeNi2As2 single crystal was synthesized;by the NaAs flux method and its physical properties were investigated by;magnetization, transport, and specific-heat measurements. In contrast to;the previously reported CaBe2Ge2-type CeNi2As2, the ThCr2Si2-type;CeNi2As2 is a highly anisotropic uniaxial antiferromagnet with the;transition temperature T-N = 4.8 K. A magnetic-field-induced spin-flop;transition was seen below T-N when the applied B is parallel to the c;axis, the magnetic easy axis, together with a huge frustration parameter;f = theta(W)/T-N. A pronounced Schottky-type anomaly in specific heat;was also found around 160 K, which could be attributed to the;crystalline electric field effect with the excitation energies being;fitted to Delta(1) = 325 K and Delta(2) = 520 K, respectively. Moreover,;the in-plane resistivity anisotropy and low-temperature x-ray;diffractions suggest that this compound is a rare example exhibiting a;possible structure distortion induced by the 4f-electron magnetic;frustration. DOI: 10.1103/PhysRevB.86.245130;Cao, Guanghan/C-4753-2008;5;0;0;0;5;1098-0121;WOS:000312833400008;;;J;Margaris, G.;Trohidou, K. N.;Iannotti, V.;Ausanio, G.;Lanotte, L.;Fiorani, D.;Magnetic behavior of dense nanoparticle assemblies: Interplay of;interparticle interactions and particle system morphology;PHYSICAL REVIEW B;86;21;214425;10.1103/PhysRevB.86.214425;DEC 26 2012;2012;The role of interparticle interactions and the morphology in the;magnetic behavior of dense assemblies of Fe nanoparticles with;concentration well above the percolation threshold has been studied;using the Monte Carlo simulations technique. The initial and;temperature-dependent magnetization curves have been calculated for;different conditions of the assembly morphology and the interparticle;interaction strengths. Our simulations showed that the strong;competition between the anisotropy and exchange energies in nonuniform;dense assemblies results in a frustration of the nanoparticles moments;coupling and creates plateaus and abrupt steps, which indicate a sudden,;collective spin reversal, for low and intermediate dipolar strengths. In;the case of strong dipolar interactions, the stepwise behavior becomes;smoother and gradually disappears. DOI: 10.1103/PhysRevB.86.214425;2;0;0;0;2;1098-0121;WOS:000312830400004;;;J;Marom, Noa;Caruso, Fabio;Ren, Xinguo;Hofmann, Oliver T.;Koerzdoerfer, Thomas;Chelikowsky, James R.;Rubio, Angel;Scheffler, Matthias;Rinke, Patrick;Benchmark of GW methods for azabenzenes;PHYSICAL REVIEW B;86;24;245127;10.1103/PhysRevB.86.245127;DEC 26 2012;2012;Many-body perturbation theory in the GW approximation is a useful method;for describing electronic properties associated with charged;excitations. A hierarchy of GW methods exists, starting from;non-self-consistent G(0)W(0), through partial self-consistency in the;eigenvalues and in the Green's function (scGW(0)), to fully;self-consistent GW (scGW). Here, we assess the performance of these;methods for benzene, pyridine, and the diazines. The quasiparticle;spectra are compared to photoemission spectroscopy (PES) experiments;with respect to all measured particle removal energies and the ordering;of the frontier orbitals. We find that the accuracy of the calculated;spectra does not match the expectations based on their level of;self-consistency. In particular, for certain starting points G(0)W(0);and scGW(0) provide spectra in better agreement with the PES than scGW.;DOI: 10.1103/PhysRevB.86.245127;Rinke, Patrick/A-4208-2010; Caruso, Fabio/D-5917-2013; Korzdorfer, Thomas/B-8266-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Ren, Xinguo/N-4768-2014;Rinke, Patrick/0000-0002-5967-9965;;17;0;0;0;17;1098-0121;WOS:000312833400006;;;J;Marty, K.;Christianson, A. D.;dos Santos, A. M.;Sipos, B.;Matsubayashi, K.;Uwatoko, Y.;Fernandez-Baca, J. A.;Tulk, C. A.;Maier, T. A.;Sales, B. C.;Lumsden, M. D.;Effect of pressure on the neutron spin resonance in the unconventional;superconductor FeTe0.6Se0.4;PHYSICAL REVIEW B;86;22;220509;10.1103/PhysRevB.86.220509;DEC 26 2012;2012;We have carried out a pressure study of the unconventional;superconductor FeTe0.6Se0.4 up to 1.5 GPa by neutron scattering,;resistivity, and magnetic susceptibility measurements. The neutron spin;resonance energy and the superconducting transition temperature have;been extracted as a function of applied pressure in samples obtained;from the same crystal. Both increase with pressure up to amaximum at;approximate to 1.3 GPa, directly demonstrating a correlation between;these two fundamental parameters of unconventional superconductivity. A;comparison between the quantitative evolution of T-c and the resonance;energy as a function of applied pressure is also discussed. These;measurements serve to demonstrate the feasibility of using pressure;dependent inelastic neutron scattering to explore the relationship;between the resonance energy and T-c in unconventional superconductors.;DOI: 10.1103/PhysRevB.86.220509;Maier, Thomas/F-6759-2012; Fernandez-Baca, Jaime/C-3984-2014; Matsubayashi, Kazuyuki/F-7696-2013;3;0;0;0;3;1098-0121;WOS:000312831800004;;;J;Mesterhazy, D.;Berges, J.;von Smekal, L.;Effect of short-range interactions on the quantum critical behavior of;spinless fermions on the honeycomb lattice;PHYSICAL REVIEW B;86;24;245431;10.1103/PhysRevB.86.245431;DEC 26 2012;2012;We present a functional renormalization group investigation of an;Euclidean three-dimensional matrix Yukawa model with U(N) symmetry,;which describes N = 2 Weyl fermions that effectively interact via a;short-range repulsive interaction. This system relates to an effective;low-energy theory of spinless electrons on the honeycomb lattice and can;be seen as a simple model for suspended graphene. We find a continuous;phase transition characterized by large anomalous dimensions for the;fermions and composite degrees of freedom. The critical exponents define;a new universality class distinct from Gross-Neveu type models,;typically considered in this context. DOI: 10.1103/PhysRevB.86.245431;7;0;0;0;7;1098-0121;WOS:000312833400016;;;J;Mizuguchi, Yoshikazu;Fujihisa, Hiroshi;Gotoh, Yoshito;Suzuki, Katsuhiro;Usui, Hidetomo;Kuroki, Kazuhiko;Demura, Satoshi;Takano, Yoshihiko;Izawa, Hiroki;Miura, Osuke;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;86;22;220510;10.1103/PhysRevB.86.220510;DEC 26 2012;2012;Exotic superconductivity has often been discovered in materials with a;layered (two-dimensional) crystal structure. The low dimensionality can;affect the electronic structure and can realize high transition;temperatures (T-c) and/or unconventional superconductivity mechanisms.;We show superconductivity in a new bismuth-oxysulfide compound Bi4O4S3.;Crystal structure analysis indicates that this superconductor has a;layered structure composed of a stacking of spacer layers and BiS2;layers. Band calculation suggests that the Fermi level for Bi4O4S3 is;just on the peak position of the partial density of states of the Bi 6p;orbital within the BiS2 layer. The BiS2 layer will be a basic structure;which provides another universality class for a layered superconducting;family, and this opens up a new field in the physics and chemistry of;low-dimensional superconductors. DOI: 10.1103/PhysRevB.86.220510;68;0;3;0;70;1098-0121;WOS:000312831800005;;;J;Mutiso, Rose M.;Sherrott, Michelle C.;Li, Ju;Winey, Karen I.;Simulations and generalized model of the effect of filler size;dispersity on electrical percolation in rod networks;PHYSICAL REVIEW B;86;21;214306;10.1103/PhysRevB.86.214306;DEC 26 2012;2012;We present a three-dimensional simulation of electrical conductivity in;isotropic, polydisperse rod networks from which we determine the;percolation threshold (phi(c)). Existing analytical models that account;for size dispersity are formulated in the slender-rod limit and are less;accurate for predicting phi(c) in composites with rods of modest L/D.;Using empirical approximations from our simulation data, we generalized;the excluded volume percolation model to account for both finite L/D and;size dispersity, providing a solution for phi(c) of polydisperse rod;networks that is quantitatively accurate across the entire L/D range.;DOI: 10.1103/PhysRevB.86.214306;Li, Ju/A-2993-2008;Li, Ju/0000-0002-7841-8058;12;0;0;0;12;1098-0121;WOS:000312830400002;;;J;Nishikawa, Y.;Hewson, A. C.;Hund's rule coupling in models of magnetic impurities and quantum dots;PHYSICAL REVIEW B;86;24;245131;10.1103/PhysRevB.86.245131;DEC 26 2012;2012;Studies of the effects of the Hund's rule coupling J(H) in multiple;orbit impurities or quantum dots using different models have led to;quite different predictions for the Kondo temperature T-K as a function;of J(H). We show that the differences depend on whether or not the;models conserve orbital angular momentum about the impurity site. Using;numerical renormalization-group calculations, we deduce the renormalized;parameters for the Fermi liquid regime and show that, despite the;differences between the models, the low-energy fixed point in the;strong-correlation regime is universal, with a single energy scale T-K;and just two renormalized interaction parameters, a renormalized single;orbital term, (U) over tilde = 4T(K), and a renormalized Hund's rule;term, (J) over tilde (H) = 8T(K)/3. DOI: 10.1103/PhysRevB.86.245131;3;0;0;0;3;1098-0121;WOS:000312833400009;;;J;Oliveira, G. N. P.;Pereira, A. M.;Lopes, A. M. L.;Amaral, J. S.;dos Santos, A. M.;Ren, Y.;Mendonca, T. M.;Sousa, C. T.;Amaral, V. S.;Correia, J. G.;Araujo, J. P.;Dynamic off-centering of Cr3+ ions and short-range magneto-electric;clusters in CdCr2S4;PHYSICAL REVIEW B;86;22;224418;10.1103/PhysRevB.86.224418;DEC 26 2012;2012;The cubic spinel CdCr2S4 gained recently a vivid interest, given the;relevance of relaxor-like dielectric behavior in its paramagnetic phase.;By a singular combination of local probe techniques, namely, pair;distribution function and perturbed angular correlation, we firmly;establish that the Cr ion plays the central key role on this exotic;phenomenon, namely, through a dynamic off-centering displacement of its;coordination sphere. We further show that this off-centering of the;magnetic Cr ion gives rise to a peculiar entanglement between the polar;and magnetic degrees of freedom, stabilizing, in the paramagnetic phase,;short-range magnetic clusters, clearly seen in ultralow-field;susceptibility measurements. Moreover, the Landau theory is here used to;demonstrate that a linear coupling between the magnetic and polar order;parameters is sufficient to justify the appearance of magnetic cluster;in the paramagnetic phase of this compound. These results open insights;on the hotly debated magnetic and polar interaction, setting a step;forward in the reinterpretation of the coupling of different physical;degrees of freedom. DOI: 10.1103/PhysRevB.86.224418;Universidade Aveiro, Departamento Fisica/E-4128-2013; Amaral, Vitor/A-1570-2009; Pereira, Andre/B-4648-2008; Amaral, Joao/C-6354-2009; Lopes, Armandina/I-5066-2013; Martins Correia, Joao Guilherme/J-5473-2013; Esteves de Araujo, Joao Pedro/D-4389-2011;Amaral, Vitor/0000-0003-3359-7133; Pereira, Andre/0000-0002-8587-262X;;Amaral, Joao/0000-0003-0488-9372; Lopes, Armandina/0000-0001-8776-0894;;Martins Correia, Joao Guilherme/0000-0002-8848-0824; Esteves de Araujo,;Joao Pedro/0000-0002-1646-7727;7;1;0;0;7;1098-0121;WOS:000312831800008;;;J;Olund, Christopher T.;Zhao, Erhai;Current-phase relation for Josephson effect through helical metal;PHYSICAL REVIEW B;86;21;214515;10.1103/PhysRevB.86.214515;DEC 26 2012;2012;Josephson junctions fabricated on the surface of three-dimensional;topological insulators ( TI) show a few unusual properties distinct from;conventional Josephson junctions. In these devices, the Josephson;coupling and the supercurrent are mediated by helical metal, the;two-dimensional surface state of the TI. A line junction of this kind is;known to support Andreev bound states at zero energy for phase bias pi;and, consequently, the so-called fractional ac Josephson effect.;Motivated by recent experiments on TI-based Josephson junctions, here we;describe a convenient algorithm to compute the bound-state spectrum and;the current-phase relation for junctions of finite length and width. We;present analytical results for the bound-state spectrum, and discuss the;dependence of the current-phase relation on the length and width of the;junction, the chemical potential of the helical metal, and temperature.;A thorough understanding of the current-phase relation may help in;designing topological superconducting qubits and manipulating Majorana;fermions. DOI: 10.1103/PhysRevB.86.214515;Zhao, Erhai/B-3463-2010;Zhao, Erhai/0000-0001-8954-1601;5;0;0;0;5;1098-0121;WOS:000312830400008;;;J;Pakdel, Sahar;Miri, MirFaez;Faraday rotation and circular dichroism spectra of gold and silver;nanoparticle aggregates;PHYSICAL REVIEW B;86;23;235445;10.1103/PhysRevB.86.235445;DEC 26 2012;2012;We study the magneto-optical response of noble metal nanoparticle;clusters. We consider the interaction between the light-induced dipoles;of particles. In the presence of a magnetic field, the simplest achiral;cluster, a dimer, exhibits circular dichroism (CD). The CD of a dimer;depends on the directions of the magnetic field and the light wave;vector. The CD of a populous cluster weakly depends on the magnetic;field. Upon scattering from the cluster, an incident linearly polarized;light with polarization azimuth. becomes elliptically polarized. The;polarization azimuth rotation and ellipticity angle variation are;sinusoidal functions of 2 phi.. The anisotropy and the chirality of the;cluster control the amplitude and offset of these sinusoidal functions.;The Faraday rotation and Faraday ellipticity are also sinusoidal;functions of 2 phi. Near the surface plasmon frequency, Faraday rotation;and Faraday ellipticity increase. DOI: 10.1103/PhysRevB.86.235445;6;0;0;0;6;1098-0121;WOS:000312832600019;;;J;Pedersen, Jesper Goor;Brynildsen, Mikkel H.;Cornean, Horia D.;Pedersen, Thomas Garm;Optical Hall conductivity in bulk and nanostructured graphene beyond the;Dirac approximation;PHYSICAL REVIEW B;86;23;235438;10.1103/PhysRevB.86.235438;DEC 26 2012;2012;We present a perturbative method for calculating the optical Hall;conductivity in a tight-binding framework based on the Kubo formalism.;The method involves diagonalization only of the Hamiltonian in absence;of the magnetic field, and thus avoids the computational problems;usually arising due to the huge magnetic unit cells required to maintain;translational invariance in the presence of a Peierls phase. A recipe;for applying the method to numerical calculations of the magneto-optical;response is presented. We apply the formalism to the case of ordinary;and gapped graphene in a next-nearest-neighbor tight-binding model as;well as graphene antidot lattices. In both cases, we find unique;signatures in the Hall response that are not captured in continuum;(Dirac) approximations. These include a nonzero optical Hall;conductivity even when the chemical potential is at the Dirac point;energy. Numerical results suggest that this effect should be measurable;in experiments. DOI: 10.1103/PhysRevB.86.235438;Goor Pedersen, Jesper/C-3965-2008; Cornean, Horia/A-4064-2008;Goor Pedersen, Jesper/0000-0002-8411-240X; Cornean,;Horia/0000-0003-2700-8785;1;0;0;0;1;1098-0121;WOS:000312832600012;;;J;Rodriguez, Alejandro W.;Reid, M. T. Homer;Johnson, Steven G.;Fluctuating-surface-current formulation of radiative heat transfer for;arbitrary geometries;PHYSICAL REVIEW B;86;22;220302;10.1103/PhysRevB.86.220302;DEC 26 2012;2012;We describe a fluctuating-surface-current formulation of radiative heat;transfer, applicable to arbitrary geometries in both the near and far;field, that directly exploits efficient and sophisticated techniques;from the boundary-element method. We validate as well as extend previous;results for spheres and cylinders, and also compute the heat transfer in;a more complicated geometry consisting of two interlocked rings.;Finally, we demonstrate how this method can be adapted to compute the;spatial distribution of heat flux on the surfaces of the bodies. DOI:;10.1103/PhysRevB.86.220302;13;0;0;0;13;1098-0121;WOS:000312831800001;;;J;Saidi, Wissam A.;Lee, Minyoung;Li, Liang;Zhou, Guangwen;McGaughey, Alan J. H.;Ab initio atomistic thermodynamics study of the early stages of Cu(100);oxidation;PHYSICAL REVIEW B;86;24;245429;10.1103/PhysRevB.86.245429;DEC 26 2012;2012;Using an ab initio atomistic thermodynamics framework, we identify the;stable surface structures during the early stages of Cu(100) oxidation;at finite temperature and pressure conditions. We predict the clean;surface, the 0.25 monolayer oxygen-covered surface, and the missing-row;reconstruction as thermodynamically stable structures in range of;100-1000 K and 10(-15)-10(5) atm, consistent with previous experimental;and theoretical results. We also investigate the thermodynamic;stabilities of possible precursors to Cu2O formation including;missing-row reconstruction structures that include extra on-or;subsurface oxygen atoms as well as boundary phases formed from two;missing-row nanodomains. While these structures are not predicted to be;thermodynamically stable for oxygen chemical potentials below the;nucleation limit of Cu2O, they are likely to exist due to kinetic;hindrance. DOI: 10.1103/PhysRevB.86.245429;Li, Liang/C-5782-2012;7;0;0;0;7;1098-0121;WOS:000312833400014;;;J;Sakuma, R.;Miyake, T.;Aryasetiawan, F.;Self-energy and spectral function of Ce within the GW approximation;PHYSICAL REVIEW B;86;24;245126;10.1103/PhysRevB.86.245126;DEC 26 2012;2012;To investigate how far the GW approximation can treat systems with;strong on-site correlations, we perform calculations of the;self-energies and spectral functions of alpha-and gamma-Ce within the GW;approximation. For this strongly correlated material, the screened;interaction exhibits a complex and rich structure which is attributed to;strong particle-hole transitions involving localized 4f states. This;structure in the screened interaction is carried over to the;self-energy, which in turn yields spectral functions with multiple;peaks. A satellite at around 5 eV above the Fermi level is formed, which;is reminiscent of the experimentally observed upper Hubbard band, while;the experimentally observed peak structure below the Fermi level at -2;eV and disappearance of the quasiparticle peak in the. phase are not;reproduced. DOI: 10.1103/PhysRevB.86.245126;6;0;0;0;6;1098-0121;WOS:000312833400005;;;J;Schulze, T. P.;Smereka, P.;Kinetic Monte Carlo simulation of heteroepitaxial growth: Wetting;layers, quantum dots, capping, and nanorings;PHYSICAL REVIEW B;86;23;235313;10.1103/PhysRevB.86.235313;DEC 26 2012;2012;A new kinetic Monte Carlo algorithm that efficiently accounts for;elastic strain is presented and applied to study various phenomena that;take place during heteroepitaxial growth. For example, it is;demonstrated that faceted quantum dots occur via the layer-by-layer;nucleation of prepyramids on top of a critical layer with faceting;occurring by anisotropic surface diffusion. It is also shown that the;dot growth is enhanced by the depletion of the critical layer which;leaves behind a wetting layer. Capping simulations provide insight into;the mechanisms behind dot erosion and ring formation. The algorithm used;for the simulations presented here is based on the observation that;adatom and dimer motion is essentially decoupled from the elastic field.;This is exploited by decomposing the film into two parts: the weakly;bonded portion and the strongly bonded portion. The weakly bonded;portion is taken to evolve independent of the elastic field. In this way;the elastic field need only be updated infrequently. Extensive;validation reveals that there is little loss of fidelity but the;algorithm is fifteen to twenty times faster. DOI:;10.1103/PhysRevB.86.235313;Smereka, Peter/F-9974-2013;7;0;0;0;7;1098-0121;WOS:000312832600009;;;J;Shukla, D. K.;Francoual, S.;Skaugen, A.;von Zimmermann, M.;Walker, H. C.;Bezmaternykh, L. N.;Gudim, I. A.;Temerov, V. L.;Strempfer, J.;Ho and Fe magnetic ordering in multiferroic HoFe3(BO3)(4);PHYSICAL REVIEW B;86;22;224421;10.1103/PhysRevB.86.224421;DEC 26 2012;2012;Resonant and nonresonant x-ray scattering studies on HoFe3(BO3)(4);reveal competing magnetic ordering of Ho and Fe moments. Temperature and;x-ray polarization dependent measurements employed at the Ho L-3 edge;directly reveal a spiral spin order of the induced Ho moments in the ab;plane propagating along the c axis, a screw-type magnetic structure. At;about 22.5 K the Fe spins are observed to rotate within the basal plane;inducing spontaneous electric polarization, P. Components of P in the;basal plane and along the c axis can be scaled with the separated;magnetic x-ray scattering intensities of the Fe and Ho magnetic;sublattices, respectively. DOI: 10.1103/PhysRevB.86.224421;Walker, Helen/C-4201-2011; Shukla, Dinesh /D-2232-2012;Walker, Helen/0000-0002-7859-5388;;1;0;0;0;1;1098-0121;WOS:000312831800011;;;J;Smolenski, T.;Kazimierczuk, T.;Goryca, M.;Jakubczyk, T.;Klopotowski, L.;Cywinski, L.;Wojnar, P.;Golnik, A.;Kossacki, P.;In-plane radiative recombination channel of a dark exciton in;self-assembled quantum dots;PHYSICAL REVIEW B;86;24;241305;10.1103/PhysRevB.86.241305;DEC 26 2012;2012;We demonstrate evidence for a radiative recombination channel of dark;excitons in self-assembled quantum dots. This channel is due to a light;hole admixture in the excitonic ground state. Its presence was;experimentally confirmed by a direct observation of the dark exciton;photoluminescence from a cleaved edge of the sample. The;polarization-resolved measurements revealed that a photon created from;the dark exciton recombination is emitted only in the direction;perpendicular to the growth axis. Strong correlation between the dark;exciton lifetime and the in-plane hole g factor enabled us to show that;the radiative recombination is a dominant decay channel of the dark;excitons in CdTe/ZnTe quantum dots. DOI: 10.1103/PhysRevB.86.241305;Cywinski, Lukasz/E-5348-2010;8;0;0;0;8;1098-0121;WOS:000312833400004;;;J;Tahara, H.;Bamba, M.;Ogawa, Y.;Minami, F.;Observation of a dynamical mixing process of exciton-polaritons in a;ZnSe epitaxial layer using four-wave mixing spectroscopy;PHYSICAL REVIEW B;86;23;235208;10.1103/PhysRevB.86.235208;DEC 26 2012;2012;We have observed a coherent spectral change of exciton-polaritons in a;ZnSe epitaxial layer through spectrally resolved four-wave mixing;spectroscopy. The spectra exhibit an exchange of the dominant peak;position between the different polariton branches depending on the delay;time of the second pulse. This result reflects the initial creation;process of polaritons with many-body interactions. The calculation based;on the exciton-photon microscopic model reveals that the spectral change;occurs due to the four-particle correlations between heavy-hole and;light-hole excitons; it clearly shows the dynamical mixing process of;exciton-polaritons in the initial creation. DOI:;10.1103/PhysRevB.86.235208;1;0;0;0;1;1098-0121;WOS:000312832600008;;;J;Tomio, Yuh;Suzuura, Hidekatsu;Ando, Tsuneya;Cross-polarized excitons in double-wall carbon nanotubes;PHYSICAL REVIEW B;86;24;245428;10.1103/PhysRevB.86.245428;DEC 26 2012;2012;Optical absorption in double-wall carbon nanotubes for light polarized;perpendicular to the tube axis is studied by taking into account exciton;effects and depolarization effects within an effective-mass theory. The;Coulomb interaction is suppressed by not only intrawall screening;effects but also interwall screening, leading to the reduction of;exciton binding energies and band gaps. When two tubes are both;semiconducting, a clear exciton peak still survives even under;depolarization effects for the outer tube, but the exciton peak of the;inner tube has an asymmetric Fano line shape due to the coupling with;continuum states of the outer tube. When a double-wall nanotube contains;a metallic tube, either inner or outer, the exciton of the;semiconducting tube loses its peak structure under depolarization;effects. DOI: 10.1103/PhysRevB.86.245428;SUZUURA, Hidekatsu/F-7605-2012;0;0;0;0;0;1098-0121;WOS:000312833400013;;;J;Tsvelik, A. M.;Model description of the supersolid state in YBa2Cu3O6+x;PHYSICAL REVIEW B;86;22;220508;10.1103/PhysRevB.86.220508;DEC 26 2012;2012;I employ a semiphenomenological model introduced by Tsvelik and Chubukov;[Phys. Rev. Lett. 98, 237001 (2007)] to describe the state with;coexisting superconductivity (SC) and charge density wave (CDW) recently;discovered in YBa2Cu3O6+x (YBCO). The SC and the CDW order parameter;fields are united in a single pseudospin and can be rotated into each;other. It is suggested that disorder creates isolated pseudospins which;become centers of inelastic scattering of electrons. It is suggested;that this scattering is responsible for the logarithmic upturn in the;resistivity rho(T) similar to - ln T observed at low doping. DOI:;10.1103/PhysRevB.86.220508;0;0;0;0;0;1098-0121;WOS:000312831800003;;;J;Uebelacker, Stefan;Honerkamp, Carsten;Self-energy feedback and frequency-dependent interactions in the;functional renormalization group flow for the two-dimensional Hubbard;model;PHYSICAL REVIEW B;86;23;235140;10.1103/PhysRevB.86.235140;DEC 26 2012;2012;We study the impact of including self-energy feedback and;frequency-dependent interactions on functional renormalization group;flows for the two-dimensional Hubbard model on the square lattice at;weak to moderate coupling strength. Previous studies using the;functional renormalization group had ignored these two ingredients to a;large extent, and the question is how much the flows to strong coupling;analyzed by this method depend on these approximations. Here we include;the imaginary part of the self-energy on the imaginary axis and the;frequency dependence of the running interactions on a frequency mesh of;10 frequencies on the Matsubara axis. We find that (i) the critical;scales for the flows to strong coupling are shifted downward by a factor;that is usually of order 1 but can get larger in specific parameter;regions, and (ii) that the leading channel in this flow does not depend;strongly on whether self-energies and frequency dependence is included;or not. We also discuss the main features of the self-energies;developing during the flows. DOI: 10.1103/PhysRevB.86.235140;5;0;0;0;5;1098-0121;WOS:000312832600002;;;J;Velizhanin, Kirill A.;Shahbazyan, Tigran V.;Long-range plasmon-assisted energy transfer over doped graphene;PHYSICAL REVIEW B;86;24;245432;10.1103/PhysRevB.86.245432;DEC 26 2012;2012;We demonstrate that longitudinal plasmons in doped monolayer graphene;can mediate highly efficient long-range energy transfer between nearby;fluorophores, e.g., semiconductor quantum dots. We derive a simple;analytical expression for the energy transfer efficiency that;incorporates all the essential processes involved. We perform numerical;calculations of the transfer efficiency for a pair of PbSe quantum dots;near graphene for interfluorophore distances of up to 1 mu m and find;that the plasmon-assisted long-range energy transfer can be enhanced by;up to a factor of similar to 10(4) relative to the Forster's transfer in;vacuum.;Velizhanin, Kirill/C-4835-2008;3;0;0;0;3;1098-0121;WOS:000312833400017;;;J;Vivo, Edoardo;Nicoli, Matteo;Engler, Martin;Michely, Thomas;Vazquez, Luis;Cuerno, Rodolfo;Strong anisotropy in surface kinetic roughening: Analysis and;experiments;PHYSICAL REVIEW B;86;24;245427;10.1103/PhysRevB.86.245427;DEC 26 2012;2012;We report an experimental assessment of surface kinetic roughening;properties that are anisotropic in space. Working for two specific;instances of silicon surfaces irradiated by ion-beam sputtering under;diverse conditions (with and without concurrent metallic impurity;codeposition), we verify the predictions and consistency of a recently;proposed scaling Ansatz for surface observables like the two-dimensional;(2D) height power spectral density (PSD). In contrast with other;formulations, this ansatz is naturally tailored to the study of;two-dimensional surfaces, and allows us to readily explore the;implications of anisotropic scaling for other observables, such as;real-space correlation functions and PSD functions for 1D profiles of;the surface. Our results confirm that there are indeed actual;experimental systems whose kinetic roughening is strongly anisotropic,;as consistently described by this scaling analysis. In the light of our;work, some types of experimental measurements are seen to be more;affected by issues like finite space resolution effects, etc. that may;hinder a clear-cut assessment of strongly anisotropic scaling in the;present and other practical contexts. DOI: 10.1103/PhysRevB.86.245427;VAZQUEZ, LUIS/A-1272-2009;VAZQUEZ, LUIS/0000-0001-6220-2810;2;0;0;0;2;1098-0121;WOS:000312833400012;;;J;Weiler, S.;Ulhaq, A.;Ulrich, S. M.;Richter, D.;Jetter, M.;Michler, P.;Roy, C.;Hughes, S.;Phonon-assisted incoherent excitation of a quantum dot and its emission;properties;PHYSICAL REVIEW B;86;24;241304;10.1103/PhysRevB.86.241304;DEC 26 2012;2012;We present a detailed study of a phonon-assisted incoherent excitation;mechanism of single quantum dots. A spectrally detuned continuous-wave;laser couples to a quantum dot transition by mediation of acoustic;phonons, whereby excitation efficiencies up to 20% with respect to;strictly resonant excitation can be achieved at T = 9 K.;Laser-frequency-dependent analysis of the quantum dot intensity;distinctly maps the underlying acoustic phonon bath and shows good;agreement with our polaron master equation theory. An analytical;solution for the steady-state exciton density (which is proportional to;the photoluminescence) is introduced which predicts a broadband;incoherent coupling process mediated by electron-phonon scattering.;Moreover, we investigate the coherence properties of the emitted light;with respect to strictly resonant versus phonon-assisted excitation,;revealing the importance of narrow band triggered emitter-state;initialization for possible applications of a quantum dot exciton system;as a qubit. DOI: 10.1103/PhysRevB.86.241304;Jetter, Michael/I-8270-2012;8;0;0;0;8;1098-0121;WOS:000312833400003;;;J;Zhang, L.;Schwertfager, N.;Cheiwchanchamnangij, T.;Lin, X.;Glans-Suzuki, P. -A.;Piper, L. F. J.;Limpijumnong, S.;Luo, Y.;Zhu, J. F.;Lambrecht, W. R. L.;Guo, J. -H.;Electronic band structure of graphene from resonant soft x-ray;spectroscopy: The role of core-hole effects;PHYSICAL REVIEW B;86;24;245430;10.1103/PhysRevB.86.245430;DEC 26 2012;2012;The electronic structure and band dispersion of graphene on SiO2 have;been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission;spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS).;Using first-principles calculations, it is found that the core-hole;effect is dramatic in XAS while it has negligible consequences in XES.;Strong dispersive features, due to the conservation of crystal momentum,;are observed in RIXS spectra. Simulated RIXS spectra based on the;Kramers-Heisenberg theory agree well with the experimental results,;provided a shift between RIXS and XAS due to the absence or presence of;the core hole is taken into account. DOI: 10.1103/PhysRevB.86.245430;Luo, Yi/B-1449-2009; Zhu, Junfa/E-4020-2010;Luo, Yi/0000-0003-0007-0394; Zhu, Junfa/0000-0003-0888-4261;10;1;0;0;10;1098-0121;WOS:000312833400015;;;J;Zhang, Steven S. -L.;Zhang, Shufeng;Spin convertance at magnetic interfaces;PHYSICAL REVIEW B;86;21;214424;10.1103/PhysRevB.86.214424;DEC 26 2012;2012;Exchange interaction between conduction electrons and magnetic moments;at magnetic interfaces leads to mutual conversion between spin current;and magnon current. We introduce a concept of spin convertance which;quantitatively measures magnon current induced by spin accumulation and;spin current created by magnon accumulation at a magnetic interface. We;predict several phenomena on charge and spin drag across a magnetic;insulator spacer for a few layered structures. DOI:;10.1103/PhysRevB.86.214424;Zhang, Shufeng/G-7833-2011;10;1;0;0;10;1098-0121;WOS:000312830400003;;;J;Nakhmedov, Enver;Alekperov, Oktay;Oppermann, Reinhold;Effects of randomness on the critical temperature in;quasi-two-dimensional organic superconductors;PHYSICAL REVIEW B;86;21;214513;10.1103/PhysRevB.86.214513;DEC 21 2012;2012;The effects of nonmagnetic disorder on the critical temperature T-c of;organic weak-linked layered superconductors with singlet in-plane;pairing are considered. A randomness in the interlayer Josephson;coupling is shown to destroy phase coherence between the layers, and T-c;suppresses smoothly in a large extent of the disorder strength.;Nevertheless, the disorder of arbitrarily high strength cannot destroy;completely the superconducting phase. The obtained quasilinear decrease;of the critical temperature with increasing disorder strength is in good;agreement with experimental measurements. DOI:;10.1103/PhysRevB.86.214513;0;0;0;0;0;1098-0121;WOS:000312693200004;;;J;Sanson, Andrea;Giarola, Marco;Rossi, Barbara;Mariotto, Gino;Cazzanelli, Enzo;Speghini, Adolfo;Vibrational dynamics of single-crystal YVO4 studied by polarized;micro-Raman spectroscopy and ab initio calculations;PHYSICAL REVIEW B;86;21;214305;10.1103/PhysRevB.86.214305;DEC 21 2012;2012;The vibrational properties of yttrium orthovanadate (YVO4) single;crystals, with tetragonal zircon structure, have been investigated by;means of polarized micro-Raman spectroscopy and ab initio calculations.;Raman spectra were taken at different polarizations and orientations;carefully set by the use of a micromanipulator, so that all of the;twelve Raman-active modes, expected on the basis of the group theory,;were selected in turn and definitively assigned in wave number and;symmetry. In particular the E-g(4) mode, assigned incorrectly in;previous literature, has been observed at 387 cm(-1). Moreover, the very;weak E-g(1) mode, peaked at about 137 cm(-1), was clearly observed only;under some excitation wavelengths, and its peculiar Raman excitation;profile was measured within a wide region of the visible. Finally, ab;initio calculations based on density-functional theory have been;performed in order to determine both Raman and infrared vibrational;modes and to corroborate the experimental results. The rather good;agreement between computational and experimental frequencies is slightly;better than in previous computational works and supports our;experimental symmetry assignments. DOI: 10.1103/PhysRevB.86.214305;Mariotto, Gino/B-1629-2013; Speghini, Adolfo/G-3474-2012;1;0;0;0;1;1098-0121;WOS:000312693200002;;;J;Thomson, R. I.;Jain, P.;Cheetham, A. K.;Carpenter, M. A.;Elastic relaxation behavior, magnetoelastic coupling, and order-disorder;processes in multiferroic metal-organic frameworks;PHYSICAL REVIEW B;86;21;214304;10.1103/PhysRevB.86.214304;DEC 21 2012;2012;Resonant ultrasound spectroscopy has been used to analyze magnetic and;ferroelectric phase transitions in two multiferroic metal-organic;frameworks (MOFs) with perovskite-like structures;[(CH3)(2)NH2]M(HCOO)(3)(DMA[M] F, M = Co, Mn). Elastic and anelastic;anomalies are evident at both the magnetic ordering temperature and;above the higher temperature ferroelectric transition. Broadening of;peaks above the ferroelectric transition implies the diminishing;presence of a dynamic process and is caused by an ordering of the;central DMA ([(CH3)(2)NH2](+)) cation which ultimately causes a change;in the hydrogen bond conformation and provides the driving mechanism for;ferroelectricity. This is unlike traditional mechanisms for;ferroelectricity in perovskites which typically involve ionic;displacements. A comparison of these mechanisms is made by drawing on;examples from the literature. Small elastic stiffening at low;temperatures suggests weak magnetoelastic coupling in these materials.;This behavior is consistent with other magnetic systems studied,;although there is no change in Q(-1) associated with magnetic;order-disorder, and is the first evidence of magnetoelastic coupling in;MOFs. This could help lead to the tailoring of MOFs with a larger;coupling leading to magnetoelectric coupling via a common strain;mechanism. DOI: 10.1103/PhysRevB.86.214304;Jain, Prashant/C-8135-2009;15;4;0;0;15;1098-0121;WOS:000312693200001;;;J;Yin, Junqi;Eisenbach, Markus;Nicholson, Don M.;Rusanu, Aurelian;Effect of lattice vibrations on magnetic phase transition in bcc iron;PHYSICAL REVIEW B;86;21;214423;10.1103/PhysRevB.86.214423;DEC 21 2012;2012;The most widely taught example of a magnetic transition is that of Fe at;1043 K. Despite the high temperature most discussions of this transition;focus on the magnetic states of a fixed spin lattice with lattice;vibrations analyzed separately and simply added. We propose a model of;alpha iron that fully couples spin and displacement degrees of freedom.;Results demonstrate a significant departure from models that treat these;coordinates independently. The success of the model rests on a first;principles calculation of changes in energy with respect to spin;configurations on a bcc-iron lattice with displacements. Complete;details of environment-dependent exchange interactions that augment the;Finnis-Sinclair potential are given and comparisons to measurements are;made. We find that coupling has no effect on critical exponents, a small;effect on the transition temperature, T-c, and a large effect on the;entropy of transformation. DOI: 10.1103/PhysRevB.86.214423;Ni, Daye/F-6920-2014;5;0;0;0;5;1098-0121;WOS:000312693200003;;;J;Butler, Keith T.;Harding, John H.;Atomistic simulation of doping effects on growth and charge transport in;Si/Ag interfaces in high-performance solar cells;PHYSICAL REVIEW B;86;24;245319;10.1103/PhysRevB.86.245319;DEC 21 2012;2012;We present the results of a first-principles atomistic simulation study;of the effects of phosphorus doping on the silver/silicon interface as;found in high-performance solar cells. Calculating the interfacial;stabilities of the (110)/(110) and (111)/(111) interfaces we demonstrate;how the presence of phosphorus increases the nucleation rate of silver;crystallites and how the relative stabilities of the interfaces depend;on the doping. We then calculate the electronic structure of the;interfaces, demonstrating how the presence of phosphorus leads to a;buildup of positive charge in the silicon and an opposite negative;charge in the silver. Finally we show how this charge buildup;significantly affects the n-type Schottky barriers at the interfaces, in;both cases lowering the Schottky barrier by more than 100 meV. DOI:;10.1103/PhysRevB.86.245319;4;0;0;0;4;1098-0121;WOS:000312697500004;;;J;Carbotte, J. P.;Schachinger, E.;c-axis optical sum in underdoped superconducting cuprates;PHYSICAL REVIEW B;86;22;224512;10.1103/PhysRevB.86.224512;DEC 21 2012;2012;In conventional metals, the total optical spectral weight under the real;part of the dynamical conductivity remains unchanged in going from;normal to superconducting state. In the underdoped cuprates, however,;experiments found that the interlayer conductivity no longer respects;this sum rule. Here, we find that a recently proposed phenomenological;model of the pseudogap state which is based on ideas of a resonating;valence bond spin liquid naturally leads to such a sum-rule violation.;For the interplane charge transfer, a coherent tunneling model is used.;We also obtain analytic results based on a simplification of the theory;which reduces it to an arc model. This provides further insight into the;effect of the opening of a pseudogap on the c-axis optical conductivity;Re[sigma(c)(omega)]. The missing area under Re[sigma(c)(omega)];normalized to the superfluid density, which is found to be one in the;Fermi-liquid limit with no pseudogap, is considerably reduced when the;pseudogap becomes large and the size of the Luttinger pockets or arcs is;small.;2;0;0;0;2;1098-0121;WOS:000312693900004;;;J;Das Sarma, S.;Sau, Jay D.;Stanescu, Tudor D.;Splitting of the zero-bias conductance peak as smoking gun evidence for;the existence of the Majorana mode in a superconductor-semiconductor;nanowire;PHYSICAL REVIEW B;86;22;220506;10.1103/PhysRevB.86.220506;DEC 21 2012;2012;Recent observations of a zero-bias conductance peak in tunneling;transport measurements in superconductor-semiconductor nanowire devices;provide evidence for the predicted zero-energy Majorana modes, but not;the conclusive proof of their existence. We establish that direct;observation of a splitting of the zero-bias conductance peak can serve;as the smoking gun evidence for the existence of the Majorana mode. We;show that the splitting has an oscillatory dependence on the Zeeman;field (chemical potential) at fixed chemical potential (Zeeman field).;By contrast, when the density is constant rather than the chemical;potential-the likely situation in the current experimental setups-the;splitting oscillations are generically suppressed. Our theory predicts;the conditions under which the splitting oscillations can serve as the;smoking gun for the experimental confirmation of the elusive Majorana;mode.;Das Sarma, Sankar/B-2400-2009;23;0;0;0;23;1098-0121;WOS:000312693900001;;;J;Durach, Maxim;Rusina, Anastasia;Transforming Fabry-Perot resonances into a Tamm mode;PHYSICAL REVIEW B;86;23;235312;10.1103/PhysRevB.86.235312;DEC 21 2012;2012;We propose an optical structure composed of two metal nanolayers;enclosing a distributed Bragg reflector (DBR) mirror. The structure is;an open photonic system whose bound modes are coupled to external;radiation. We apply the special theoretical treatment based on inversion;symmetry of the structure to classify its resonances. We show that the;structure supports resonances transitional between Fabry-Perot modes and;Tamm plasmons. When the dielectric contrast of the DBR is removed these;modes are a pair of conventional Fabry-Perot resonances. They spectrally;merge into a Tamm mode at high contrast. The optical properties of the;structure in the frequency range of the DBR stop band, including highly;beneficial 50% transmittivity through thick structures with;sub-skin-depth metal films, are determined by the hybrid quasinormal;modes of the open nonconservative structure under consideration. The;results can find a broad range of applications in photonics and;optoelectronics, including the possibility of coherent control over;optical fields in the class of structures similar to the one proposed;here. DOI: 10.1103/PhysRevB.86.235312;3;0;1;0;4;1098-0121;WOS:000312694800003;;;J;Gumeniuk, Roman;Sarkar, Rajib;Geibel, Christoph;Schnelle, Walter;Paulmann, Carsten;Baenitz, Michael;Tsirlin, Alexander A.;Guritanu, Violeta;Sichelschmidt, Joerg;Grin, Yuri;Leithe-Jasper, Andreas;YbPtGe2: A multivalent charge-ordered system with an unusual spin;pseudogap;PHYSICAL REVIEW B;86;23;235138;10.1103/PhysRevB.86.235138;DEC 21 2012;2012;We performed a study of the structural and physical properties of;YbPtGe2. This compound is a multivalent charge-ordered system presenting;an unusual spin pseudogap below 200 K. The crystal structure of YbPtGe2;is refined from single-crystal and powder high-resolution synchrotron;x-ray diffraction data at different temperatures. Analysis of the;structural features of YbPtGe2, together with a combined study of Yb;L-III x-ray absorption spectroscopy, magnetic susceptibility chi(T),;thermopower S(T), and Yb-171 and Pt-195 NMR indicate half of the Yb;atoms to be in an intermediate valence state with an electronic;configuration close to 4f(13) (Yb3+), while for the remaining Yb atoms;the 4f(14) (Yb2+) configuration with almost no valence fluctuations is;most likely. A drastic drop of the magnetic susceptibility and a;decrease of the isotropic shift K-195(iso)(T) with decreasing;temperature in the temperature range of 50-200 K evidence the opening of;a spin pseudogap with an activation energy of Delta/k(B) similar to 200;K. Surprisingly, transport properties do not show clear evidence for the;opening of a charge gap, thus excluding a standard Kondo-insulator;scenario. Possible origins for this unusual electronic (valence);behavior are discussed. DOI: 10.1103/PhysRevB.86.235138;Sichelschmidt, Joerg/A-6005-2013; Sarkar, Rajib/G-9738-2011; Tsirlin, Alexander/D-6648-2013;3;1;0;0;3;1098-0121;WOS:000312694800002;;;J;Ivek, T.;Kovacevic, I.;Pinteric, M.;Korin-Hamzic, B.;Tomic, S.;Knoblauch, T.;Schweitzer, D.;Dressel, M.;Cooperative dynamics in charge-ordered state of alpha-(BEDT-TTF)(2)I-3;PHYSICAL REVIEW B;86;24;245125;10.1103/PhysRevB.86.245125;DEC 21 2012;2012;Electric-field-dependent pulse measurements are reported in the;charge-ordered state of alpha-(BEDT-TTF)(2)I-3. At low electric fields;up to about 50 V/cm only negligible deviations from Ohmic behavior can;be identified with no threshold field. At larger electric fields and up;to about 100 V/cm a reproducible negative differential resistance is;observed with a significant change in shape of the measured resistivity;in time. These changes critically depend on whether constant voltage or;constant current is applied to the single crystal. At high enough;electric fields the resistance displays a dramatic drop down to metallic;values and relaxes subsequently in a single-exponential manner to its;low-field steady-state value. We argue that such an;electric-field-induced negative differential resistance and switching to;transient states are fingerprints of cooperative domain-wall dynamics;inherent to two-dimensional bond-charge density waves with;ferroelectric-like nature. DOI: 10.1103/PhysRevB.86.245125;Dressel, Martin/D-3244-2012; Ivek, Tomislav/D-5298-2011; Tomic, Silvia/D-5466-2011;3;0;0;0;3;1098-0121;WOS:000312697500002;;;J;Katanin, A.;Longitudinal and transverse static spin fluctuations in layered;ferromagnets and antiferromagnets;PHYSICAL REVIEW B;86;22;224416;10.1103/PhysRevB.86.224416;DEC 21 2012;2012;We analyze the momentum dependence of static susceptibilities of layered;local-moment systems below Curie (Neel) temperature within the 1/S;expansion, the renormalization-group (RG) approach, and the first order;of the 1/N expansion. We argue that already at sufficiently low;temperatures the previously known results of the spin-wave theory and RG;approach for the transverse spin susceptibility acquire strong;corrections, which appear due to the interaction of the incoming magnon;having momentum q with virtual magnons having momenta k < q. Such;corrections cannot be treated in the standard RG approach but can be;described by both 1/S and 1/N expansions. The results of these;expansions can be successfully extrapolated to T = T-M, yielding the;correct weight of static spin fluctuations, determined by the O(3);symmetry. For the longitudinal susceptibility, the summation of leading;terms of the 1/S expansion within the parquet approach allows us to;fulfill the sum rule for the weights of transverse and longitudinal;fluctuations in a broad temperature region below T-M outside the;critical regime. We also discuss the effect of longitudinal spin;fluctuations on the (sublattice) magnetization of layered systems.;Katanin, Andrey/J-4706-2013;Katanin, Andrey/0000-0003-1574-657X;0;0;0;0;0;1098-0121;WOS:000312693900002;;;J;Liu, Jingbo;Mendis, Rajind;Mittleman, Daniel M.;Designer reflectors using spoof surface plasmons in the terahertz range;PHYSICAL REVIEW B;86;24;241405;10.1103/PhysRevB.86.241405;DEC 21 2012;2012;We show that spoof surface plasmons can be used to control the;reflection of terahertz radiation at the output facet of a;parallel-plate waveguide. Using a periodic groove pattern on the output;face, reflectivity approaching 100% can be achieved within a limited;spectral range. Unlike the conventional geometry for plasmon-enhanced;transmission, this approach enables a unique method for studying the;coupling between the guided mode and the surface plasmon through;angle-dependent measurement of the plasmon-mediated reflection. A simple;model incorporating the surface plasmon coupling to the waveguide mode;can adequately explain all of the observed phenomena, including the;observed Goos-Hanchen shift in the reflected beam. DOI:;10.1103/PhysRevB.86.241405;2;0;0;0;2;1098-0121;WOS:000312697500001;;;J;Sato, Toshihiro;Hattori, Kazumasa;Tsunetsugu, Hirokazu;Transport criticality at the Mott transition in a triangular-lattice;Hubbard model;PHYSICAL REVIEW B;86;23;235137;10.1103/PhysRevB.86.235137;DEC 21 2012;2012;We study electric transport near the Mott metal-insulator transition in;a triangular-lattice Hubbard model at half filling. We calculate optical;conductivity sigma(omega) based on a cellular dynamical mean-field;theory including vertex corrections inside the cluster. Near the Mott;critical end point, a Drude analysis in the metallic region suggests;that the change in the Drude weight is important rather than that in the;transport scattering rate for the Mott transition. In the insulating;region, there emerges an "in-gap" peak in sigma(omega) at low omega near;the Mott transition, and this smoothly connects to the Drude peak in the;metallic region with decreasing Coulomb repulsion. We find that the;weight of these peaks exhibits a power-law behavior upon controlling;Coulomb repulsion at the critical temperature. The obtained critical;exponent suggests that conductivity does not correspond to magnetization;or energy density of the Ising universality class in contrast to several;previous works. DOI: 10.1103/PhysRevB.86.235137;Hattori, Kazumasa/B-2554-2013;1;0;0;0;1;1098-0121;WOS:000312694800001;;;J;Schaffer, Robert;Bhattacharjee, Subhro;Kim, Yong Baek;Quantum phase transition in Heisenberg-Kitaev model;PHYSICAL REVIEW B;86;22;224417;10.1103/PhysRevB.86.224417;DEC 21 2012;2012;We explore the nature of the quantum phase transition between a;magnetically ordered state with collinear spin pattern and a gapless;Z(2) spin liquid in the Heisenberg-Kitaev model. We construct a slave;particle mean-field theory for the Heisenberg-Kitaev model in terms of;complex fermionic spinons. It is shown that this theory, formulated in;the appropriate basis, is capable of describing the Kitaev spin liquid;as well as the transition between the gapless Z(2) spin liquid and the;so-called stripy antiferromagnet. Within our mean-field theory, we find;a discontinuous transition from the Z(2) spin liquid to the stripy;antiferromagnet. We argue that subtle spinon confinement effects,;associated with the instability of gapped U(1) spin liquid in two;spatial dimensions, play an important role at this transition. The;possibility of an exotic continuous transition is briefly addressed.;13;0;0;0;13;1098-0121;WOS:000312693900003;;;J;Schaich, W. L.;Puscasu, Irina;Tuning infrared emission from microstrip arrays;PHYSICAL REVIEW B;86;24;245423;10.1103/PhysRevB.86.245423;DEC 21 2012;2012;Earlier work has shown that a narrow-frequency-band, wide-angle emission;is produced by an array of metal patches supported on a thin dielectric;layer covering a ground plane. The modes responsible for this emission;are local plasmons trapped under the metal patches. As the dielectric;layer thickness, h(d), is increased, the resonant emission fades in;strength because the plasmon modes can no longer be trapped under a;single patch. Further increases in h(d), making it comparable to the;light wavelength in the dielectric layer, lead to a collection of new;emission peaks. These are narrower than the one peak found for small;h(d) but they are not well separated. We have found that some of these;peaks can be suppressed over a narrow range of h(d). This leaves one;with well-separated, narrow-band emission peaks. We have identified the;physical mechanism for this selective suppression of emission peaks.;DOI: 10.1103/PhysRevB.86.245423;0;0;0;0;0;1098-0121;WOS:000312697500005;;;J;Teperik, T. V.;Degiron, A.;Design strategies to tailor the narrow plasmon-photonic resonances in;arrays of metallic nanoparticles;PHYSICAL REVIEW B;86;24;245425;10.1103/PhysRevB.86.245425;DEC 21 2012;2012;Arrays of metallic nanoparticles can support mixed plasmon-photonic;resonances known as lattice surface modes. Their properties are well;known, but a general strategy to control their properties is still;lacking. In this article, we offer a perspective on the formation of;these modes and show that their excitation depends on constructive and;destructive interferences between the excitation field and the light;scattered by the resonant nanoparticles. It is therefore possible to;design the response of the system through a careful choice of the;excitation conditions and/or by tuning the polarizability of the;particles forming the periodic arrays. DOI: 10.1103/PhysRevB.86.245425;10;0;0;0;10;1098-0121;WOS:000312697500007;;;J;Thakurathi, Manisha;Sen, Diptiman;Dutta, Amit;Fidelity susceptibility of one-dimensional models with twisted boundary;conditions;PHYSICAL REVIEW B;86;24;245424;10.1103/PhysRevB.86.245424;DEC 21 2012;2012;Recently it has been shown that the fidelity of the ground state of a;quantum many-body system can be used todetect its quantum critical;points (QCPs). If g denotes the parameter in the Hamiltonian with;respect to which the fidelity is computed, we find that for;one-dimensional models with large but finite size, the fidelity;susceptibility chi(F) can detect a QCP provided that the correlation;length exponent satisfies nu < 2. We then show that chi(F) can be used;to locate a QCP even if nu >= 2 if we introduce boundary conditions;labeled by a twist angle N theta, where N is the system size. If the QCP;lies at g = 0, we find that if N is kept constant, chi(F) has a scaling;form given by chi(F) similar to theta(-2/nu) f (g/theta(1/nu)) if theta;<< 2 pi/N. We illustrate this both in a tight-binding model of fermions;with a spatially varying chemical potential with amplitude h and period;2q in which nu = q, and in a XY spin-1/2 chain in which nu = 2. Finally;we show that when q is very large, the model has two additional QCPs at;h = +/- 2 which cannot be detected by studying the energy spectrum but;are clearly detected by chi(F). The peak value and width of chi(F) seem;to scale as nontrivial powers of q at these QCPs. We argue that these;QCPs mark a transition between extended and localized states at the;Fermi energy. DOI: 10.1103/PhysRevB.86.245424;3;0;0;0;3;1098-0121;WOS:000312697500006;;;J;Thalmeier, Peter;Akbari, Alireza;Inelastic magnetic scattering effect on local density of states of;topological insulators;PHYSICAL REVIEW B;86;24;245426;10.1103/PhysRevB.86.245426;DEC 21 2012;2012;Magnetic ions such as Fe, Mn, and Co with localized spins may be;adsorbed on the surface of topological insulators such as Bi2Se3. They;form scattering centers for the helical surface states which have a;Dirac cone dispersion as long as the local spins are disordered.;However, the local density of states (LDOS) may be severely modified by;the formation of bound states. Commonly, only elastic scattering due to;normal and exchange potentials of the adatom is assumed. Magnetization;measurements show, however, that considerable magnetic single-ion;anisotropies exist which lead to a splitting of the local impurity spin;states, resulting in a singlet ground state. Therefore inelastic;scattering processes of helical Dirac electrons become possible, as;described by a dynamical local self-energy of second order in the;exchange interaction. The self energy influences bound-state formation;and leads to significant new anomalies in the LDOS at low energies and;low temperatures, which we calculate within the T-matrix approach. We;propose that they may be used for spectroscopy of local impurity spin;states by appropriate tuning of the chemical potential and magnetic;field. DOI: 10.1103/PhysRevB.86.245426;Akbari, Alireza/A-3738-2012;0;0;0;0;0;1098-0121;WOS:000312697500008;;;J;Ungier, W.;Wilamowski, Z.;Jantsch, W.;Spin-orbit force due to Rashba coupling at the spin resonance condition;PHYSICAL REVIEW B;86;24;245318;10.1103/PhysRevB.86.245318;DEC 21 2012;2012;We analyze the effect of Rashba type of spin-orbit (SO) coupling on the;electron dynamics and the rf electrical conductivity. We show that in;addition to the momentum current an additional SO current occurs which;can be attributed to a SO contribution to the electric Lorentz force.;This Rashba SO force is proportional to the time derivative of the;electron magnetization. Therefore, in a static electromagnetic field SO;interaction does not affect the electric or the spin current. Applying;an rf electric current, however, an rf magnetization can be efficiently;induced via the rf Rashba field. Thus, at the Larmor frequency a;characteristic current induced electron spin resonance occurs. There the;absorbed electric power is efficiently converted into magnetic energy.;DOI: 10.1103/PhysRevB.86.245318;1;0;0;0;1;1098-0121;WOS:000312697500003;;;J;Chen, Xie;Wen, Xiao-Gang;Chiral symmetry on the edge of two-dimensional symmetry protected;topological phases;PHYSICAL REVIEW B;86;23;235135;10.1103/PhysRevB.86.235135;DEC 20 2012;2012;Symmetry protected topological (SPT) states are short-range entangled;states with symmetry. The boundary of a SPT phases has either gapless;excitations or degenerate ground states, around a gapped bulk. Recently,;we proposed a systematic construction of SPT phases in interacting;bosonic systems, however it is not very clear what is the form of the;low-energy excitations on the gapless edge. In this paper, we answer;this question for two-dimensional (2D) bosonic SPT phases with Z(N) and;U(1) symmetry. We find that while the low-energy modes of the gapless;edges are nonchiral, symmetry acts on them in a "chiral" way, i.e., acts;on the right movers and the left movers differently. This special;realization of symmetry protects the gaplessness of the otherwise;unstable edge states by prohibiting a direct scattering between the left;and right movers. Moreover, understanding of the low-energy effective;theory leads to experimental predictions about the SPT phases. In;particular, we find that all the 2D U(1) SPT phases have even integer;quantized Hall conductance. DOI: 10.1103/PhysRevB.86.235135;12;1;1;0;12;1098-0121;WOS:000312694400001;;;J;Croy, Alexander;Midtvedt, Daniel;Isacsson, Andreas;Kinaret, Jari M.;Nonlinear damping in graphene resonators;PHYSICAL REVIEW B;86;23;235435;10.1103/PhysRevB.86.235435;DEC 20 2012;2012;Based on a continuum mechanical model for single-layer graphene, we;propose and analyze a microscopic mechanism for dissipation in;nanoelectromechanical graphene resonators. We find that coupling between;flexural modes and in-plane phonons leads to linear and nonlinear;damping of out-of-plane vibrations. By tuning external parameters such;as bias and ac voltages, one can cross over from a linear-to a;nonlinear-damping dominated regime. We discuss the behavior of the;effective quality factor in this context. DOI:;10.1103/PhysRevB.86.235435;Isacsson, Andreas/A-6932-2008; Croy, Alexander/D-4149-2013;Croy, Alexander/0000-0001-9296-9350;13;1;0;0;13;1098-0121;WOS:000312694400004;;;J;Juarez-Reyes, L.;Pastor, G. M.;Stepanyuk, V. S.;Tuning substrate-mediated magnetic interactions by external surface;charging: Co and Fe impurities on Cu(111);PHYSICAL REVIEW B;86;23;235436;10.1103/PhysRevB.86.235436;DEC 20 2012;2012;The substrate-mediated magnetic interactions between substitutional Co;and Fe impurities at the Cu(111) surface have been theoretically;investigated as a function of external surface charging. The;modification of the interactions as a result of the metallic screening;and charge rearrangements are determined self-consistently from first;principles by using the Green's-function Korringa-Kohn-Rostoker method.;As in the neutral Cu(111) surface, the effective magnetic exchange;coupling Delta E between impurities shows;Ruderman-Kittel-Kasuya-Yosida-like (RKKY) oscillations as a function of;the interimpurity distance. At large interimpurity distances, the;wavelength of the RKKY oscillation is not significantly affected by the;value and polarity of the external surface charge. Still, important;changes in the magnitude of Delta E are observed. For short distances,;up to fourth nearest neighbors, surface charging offers remarkable;possibilities of controlling the sign and strength of the magnetic;coupling. A nonmonotonous dependence of Delta E, including changes from;ferromagnetic to antiferromagnetic coupling, is observed as a function;of overlayer charging. The charge-induced changes in the surface;electronic structure, local magnetic moments, electronic densities of;states, and interaction energies are analyzed from a local perspective.;The resulting possibilities of manipulating the magnetic interactions in;surface nanostructures are discussed. DOI: 10.1103/PhysRevB.86.235436;2;0;0;0;2;1098-0121;WOS:000312694400005;;;J;Kurahashi, M.;Sun, X.;Yamauchi, Y.;Magnetic properties of O-2 adsorbed on Cu(100): A spin-polarized;metastable He beam study;PHYSICAL REVIEW B;86;24;245421;10.1103/PhysRevB.86.245421;DEC 20 2012;2012;Magnetic properties of O-2 adsorbed on Cu(100) were investigated by;monitoring the spin dependence in Penning ionization of metastable;He(2(3)S) under external magnetic fields of 0-5 T. A clear spin;polarization was found for the 3 sigma and 1 pi(u) orbitals of;physisorbed O-2 under external fields, while the spin polarization;disappeared when O-2 was changed into the chemisorbed state at >50 K.;The magnetic susceptibility at the surface of multilayer and monolayer;of physisorbed O-2 on Cu(100) was similar to that for the bulk liquid;O-2. Observed exchange splittings and spin polarization suggest that a;physisorbed O-2 molecule has a magnetic moment close to that for an;isolated O-2 molecule even at submonolayer coverages, while a density;functional theory calculation predicts a much reduced magnetic moment;for O-2 directly adsorbed on Cu(100). DOI: 10.1103/PhysRevB.86.245421;KURAHASHI, Mitsunori/H-2801-2011;1;0;0;0;1;1098-0121;WOS:000312696900004;;;J;Livneh, Y.;Klipstein, P. C.;Klin, O.;Snapi, N.;Grossman, S.;Glozman, A.;Weiss, E.;k . p model for the energy dispersions and absorption spectra of;InAs/GaSb type-II superlattices;PHYSICAL REVIEW B;86;23;235311;10.1103/PhysRevB.86.235311;DEC 20 2012;2012;We have fitted the k . p model derived recently by one of the authors;[Klipstein, Phys. Rev. B 81, 235314 (2010)] to experimentally measured;photoabsorption spectra at 77 and 300 K for representative InAs/GaSb;superlattices with band-gap wavelengths between 4.3 and 10.5 mu m. The;model is able to reproduce the main features of the absorption spectra,;including a strong peak from the zone boundary HH2 -> E-1 transition. We;have also used the same model to predict the band-gap wavelengths of;over 30 more superlattices, measured by photoluminescence spectroscopy.;The maximum error is 0.6 mu m, which corresponds to an uncertainty of;less than 0.4 ML in layer width. This is comparable with the;experimental uncertainty in layer widths, determined by in situ;beam-flux measurements in the growth reactor. By eliminating all terms;from the Hamiltonian, the energy contribution of which is less than the;error due to the uncertainty in layer widths, the number of unknown;fitting parameters has been reduced to six: two Luttinger parameters,;three interface parameters, and the valence band offset. The remaining;four Luttinger parameters are not independent and are determined from;the two independent ones. Our set of Luttinger parameters is close to;that reported by Lawaetz [Phys. Rev. B 4, 3460 (1971)], with a maximum;deviation in any parameter of 0.6. The interface parameters are diagonal;and have values of D-S = 3 eV angstrom, D-X = 1.3 eV angstrom, and D-Z =;1.1 eV angstrom at 77 K. The off-diagonal interface parameters alpha and;beta are too small to be fitted with any accuracy and have negligible;effect on the unpolarized photoabsorption spectra. We also propose;values for the room-temperature Luttinger and interface parameters. The;fitted unstrained InAs/GaSb band overlap is 0.142 eV. DOI:;10.1103/PhysRevB.86.235311;5;0;0;0;5;1098-0121;WOS:000312694400003;;;J;Sales, Brian C.;May, Andrew F.;McGuire, Michael A.;Stone, Matthew B.;Singh, David J.;Mandrus, David;Transport, thermal, and magnetic properties of the narrow-gap;semiconductor CrSb2;PHYSICAL REVIEW B;86;23;235136;10.1103/PhysRevB.86.235136;DEC 20 2012;2012;Resistivity, the Hall effect, the Seebeck coefficient, thermal;conductivity, heat capacity, and magnetic susceptibility data are;reported for CrSb2 single crystals. In spite of some unusual features in;electrical transport and Hall measurements below 100 K, only one phase;transition is found in the temperature range from 2 to 750 K;corresponding to long-range antiferromagnetic order below T-N;approximate to 273 K. Many of the low-temperature properties can be;explained by the thermal depopulation of carriers from the conduction;band into a low-mobility band located approximately 16 meV below the;conduction-band edge, as deduced from the Hall effect data. In analogy;with what occurs in Ge, the low-mobility band is likely an impurity;band. The Seebeck coefficient, S, is large and negative for temperatures;from 2 to 300 K ranging from approximate to -70 mu V/K at 300 K to -4500;mu V/K at 18 K. A large maximum in vertical bar S vertical bar at 18 K;is likely due to phonon drag, with the abrupt drop in vertical bar S;vertical bar below 18 K due to the thermal depopulation of the;high-mobility conduction band. The large thermal conductivity between 10;and 20 K (approximate to 350 W/m K) is consistent with this;interpretation, as are detailed calculations of the Seebeck coefficient;made using the complete calculated electronic structure. These data are;compared to data reported for FeSb2, which crystallizes in the same;marcasite structure, and FeSi, another unusual narrow-gap semiconductor.;DOI: 10.1103/PhysRevB.86.235136;Stone, Matthew/G-3275-2011; McGuire, Michael/B-5453-2009; May, Andrew/E-5897-2011; Mandrus, David/H-3090-2014;McGuire, Michael/0000-0003-1762-9406;;7;0;0;0;7;1098-0121;WOS:000312694400002;;;J;Toews, W.;Pastor, G. M.;Spin-polarized density-matrix functional theory of the single-impurity;Anderson model;PHYSICAL REVIEW B;86;24;245123;10.1103/PhysRevB.86.245123;DEC 20 2012;2012;Lattice density functional theory (LDFT) is used to investigate spin;excitations in the single-impurity Anderson model. In this method, the;single-particle density matrix gamma(ij sigma) with respect to the;lattice sites replaces the wave function as the basic variable of the;many-body problem. A recently developed two-level approximation (TLA) to;the interaction-energy functional W[gamma] is extended to systems having;spin-polarized density distributions and bond orders. This allows us to;investigate the effect of external magnetic fields and, in particular,;the important singlet-triplet gap Delta E, which determines the Kondo;temperature. Applications to finite Anderson rings and square lattices;show that the gap Delta E as well as other ground-state and;excited-state properties are very accurately reproduced. One concludes;that the spin-polarized TLA is reliable in all interaction regimes, from;weak to strong correlations, for different hybridization strengths and;for all considered impurity valence states. In this way the efficiency;of LDFT to account for challenging electron-correlation effects is;demonstrated. DOI: 10.1103/PhysRevB.86.245123;1;0;0;0;1;1098-0121;WOS:000312696900002;;;J;Weichselbaum, Andreas;Tensor networks and the numerical renormalization group;PHYSICAL REVIEW B;86;24;245124;10.1103/PhysRevB.86.245124;DEC 20 2012;2012;The full-density-matrix numerical renormalization group has evolved as a;systematic and transparent setting for the calculation of;thermodynamical quantities at arbitrary temperatures within the;numerical renormalization group (NRG) framework. It directly evaluates;the relevant Lehmann representations based on the complete basis sets;introduced by Anders and Schiller [Phys. Rev. Lett. 95, 196801 (2005)].;In addition, specific attention is given to the possible feedback from;low-energy physics to high energies by the explicit and careful;construction of the full thermal density matrix, naturally generated;over a distribution of energy shells. Specific examples are given in;terms of spectral functions (fdmNRG), time-dependent NRG (tdmNRG),;Fermi-golden-rule calculations (fgrNRG) as well as the calculation of;plain thermodynamic expectation values. Furthermore, based on the very;fact that, by its iterative nature, the NRG eigenstates are naturally;described in terms of matrix product states, the language of tensor;networks has proven enormously convenient in the description of the;underlying algorithmic procedures. This paper therefore also provides a;detailed introduction and discussion of the prototypical NRG;calculations in terms of their corresponding tensor networks. DOI:;10.1103/PhysRevB.86.245124;Weichselbaum, Andreas/I-8858-2012;Weichselbaum, Andreas/0000-0002-5832-3908;8;0;0;0;8;1098-0121;WOS:000312696900003;;;J;Yan, Jun;Jacobsen, Karsten W.;Thygesen, Kristian S.;Conventional and acoustic surface plasmons on noble metal surfaces: A;time-dependent density functional theory study;PHYSICAL REVIEW B;86;24;241404;10.1103/PhysRevB.86.241404;DEC 20 2012;2012;First-principles calculations of the conventional and acoustic surface;plasmons (CSPs and ASPs) on the (111) surfaces of Cu, Ag, and Au are;presented. The effect of s-d interband transitions on both types of;plasmons is investigated by comparing results from the local density;approximation and an orbital-dependent exchange-correlation (xc);potential that improves the position and width of the d bands. The;plasmon dispersions calculated with the latter xc potential agree well;with electron energy loss spectroscopy (EELS) experiments. For both the;CSP and ASP, the same trend of Cu < Au < Ag is found for the plasmon;energies and is attributed to the reduced screening by interband;transitions from Cu, to Au and Ag. This trend for the ASP, however,;contradicts a previous model prediction. While the ASP is seen as a weak;feature in the EELS, it can be clearly identified in the static and;dynamic dielectric band structure. DOI: 10.1103/PhysRevB.86.241404;Jacobsen, Karsten/B-3602-2009; Yan, Jun/K-3474-2012; Thygesen, Kristian /B-1062-2011;7;0;0;0;7;1098-0121;WOS:000312696900001;;;J;Euchner, H.;Pailhes, S.;Nguyen, L. T. K.;Assmus, W.;Ritter, F.;Haghighirad, A.;Grin, Y.;Paschen, S.;de Boissieu, M.;Phononic filter effect of rattling phonons in the thermoelectric;clathrate Ba8Ge40+xNi6-x;PHYSICAL REVIEW B;86;22;224303;10.1103/PhysRevB.86.224303;DEC 20 2012;2012;One of the key requirements for good thermoelectric materials is a low;lattice thermal conductivity. Here we present a combined neutron;scattering and theoretical investigation of the lattice dynamics in the;type I clathrate system Ba-Ge-Ni, which fulfills this requirement. We;observe a strong hybridization between phonons of the Ba guest atoms and;acoustic phonons of the Ge-Ni host structure over a wide region of the;Brillouin zone, which is in contrast with the frequently adopted picture;of isolated Ba atoms in Ge-Ni host cages. It occurs without a strong;decrease of the acoustic phonon lifetime, which contradicts the usual;assumption of strong anharmonic phonon-phonon scattering processes.;Within the framework of ab initio density-functional theory calculations;we interpret these hybridizations as a series of anticrossings which act;as a low-pass filter, preventing the propagation of acoustic phonons. To;highlight the effect of such a phononic low-pass filter on the thermal;transport, we compute the contribution of acoustic phonons to the;thermal conductivity of Ba8Ge40Ni6 and compare it to those of pure Ge;and a Ge-46 empty-cage model system. DOI: 10.1103/PhysRevB.86.224303;Paschen, Silke/C-3841-2014;Paschen, Silke/0000-0002-3796-0713;8;1;0;0;8;1098-0121;WOS:000312693600002;;;J;Harvey, J. -P.;Gheribi, A. E.;Chartrand, P.;Thermodynamic integration based on classical atomistic simulations to;determine the Gibbs energy of condensed phases: Calculation of the;aluminum-zirconium system;PHYSICAL REVIEW B;86;22;224202;10.1103/PhysRevB.86.224202;DEC 20 2012;2012;In this work, an in silico procedure to generate a fully coherent set of;thermodynamic properties obtained from classical molecular dynamics (MD);and Monte Carlo (MC) simulations is proposed. The procedure is applied;to the Al-Zr system because of its importance in the development of high;strength Al-Li alloys and of bulk metallic glasses. Cohesive energies of;the studied condensed phases of the Al-Zr system (the liquid phase, the;fcc solid solution, and various orthorhombic stoichiometric compounds);are calculated using the modified embedded atom model (MEAM) in the;second-nearest-neighbor formalism (2NN). The Al-Zr MEAM-2NN potential is;parameterized in this work using ab initio and experimental data found;in the literature for the AlZr3-L1(2) structure, while its predictive;ability is confirmed for several other solid structures and for the;liquid phase. The thermodynamic integration (TI) method is implemented;in a general MC algorithm in order to evaluate the absolute Gibbs energy;of the liquid and the fcc solutions. The entropy of mixing calculated;from the TI method, combined to the enthalpy of mixing and the heat;capacity data generated from MD/MC simulations performed in the;isobaric-isothermal/canonical (NPT/NVT) ensembles are used to;parameterize the Gibbs energy function of all the condensed phases in;the Al-rich side of the Al-Zr system in a CALculation of PHAse Diagrams;(CALPHAD) approach. The modified quasichemical model in the pair;approximation (MQMPA) and the cluster variation method (CVM) in the;tetrahedron approximation are used to define the Gibbs energy of the;liquid and the fcc solid solution respectively for their entire range of;composition. Thermodynamic and structural data generated from our MD/MC;simulations are used as input data to parameterize these thermodynamic;models. A detailed analysis of the validity and transferability of the;Al-Zr MEAM-2NN potential is presented throughout our work by comparing;the predicted properties obtained from this formalism with available ab;initio and experimental data for both liquid and solid phases. DOI:;10.1103/PhysRevB.86.224202;0;0;0;0;0;1098-0121;WOS:000312693600001;;;J;Hoffman, Silas;Upadhyaya, Pramey;Tserkovnyak, Yaroslav;Spin-torque ac impedance in magnetic tunnel junctions;PHYSICAL REVIEW B;86;21;214420;10.1103/PhysRevB.86.214420;DEC 20 2012;2012;Subjecting a magnetic tunnel junction (MTJ) to a spin-transfer torque;and/or electric voltage-induced magnetic anisotropy induces magnetic;precession, which can reciprocally pump current through the circuit.;This results in an ac impedance, which is sensitive to the magnetic;field applied to the MTJ. Measurement of this impedance can be used to;characterize the nature of the coupling between the magnetic free layer;and the electric input as well as a readout of the magnetic;configuration of the MTJ. DOI: 10.1103/PhysRevB.86.214420;1;0;0;0;1;1098-0121;WOS:000312674200003;;;J;Martinez, Enrique;Caro, Alfredo;Atomistic modeling of long-term evolution of twist boundaries under;vacancy supersaturation;PHYSICAL REVIEW B;86;21;214109;10.1103/PhysRevB.86.214109;DEC 20 2012;2012;Vacancy accumulation in 4 degrees {110} bcc Fe and 2 degrees {111} fcc;Cu twist boundaries (TBs) has been studied. These interfaces are;characterized by different sets of screw dislocations: two sets of;a(0)/2 < 111 > and one set of a(0)/2 < 100 > in Fe and three sets of;a(0)/6 < 112 > in Cu. We observe that vacancies agglomerate;preferentially at the misfit dislocation intersections (MDIs), where;their formation energy is lower. In bcc the dislocation structure;remains stable, but in fcc the interface rearranges itself increasing;the stacking fault area. To perform this study a kinetic Monte Carlo;algorithm coupled with the molecular dynamics code LAMMPS has been;developed. Atomic positions are relaxed at every step after an event;takes place to account for long-range strain fields. The events;considered in this work are vacancy migration hops. The rates are;calculated via harmonic transition state theory with the energy at the;saddle point obtained either by a linear approximation considering the;relaxed energy of the initial and final configurations or the;nudged-elastic band method depending on the vacancy position in the;sample. Vacancy diffusivities at both interfaces have also been;calculated. For the {110} TB in Fe the diffusivity is of the same order;of magnitude as in bulk (D-TB(Fe) = 2.60 x 10(-13) m(2)/s) while at the;{111} TB in Cu, diffusivities are two orders of magnitude larger than in;bulk (D-TB(Cu) = 2.06 x 10(-12) m(2)/s). The correlation factors at both;interfaces are extremely low (f(TB)(Fe) = 1.61 x 10(-4) and f(TB)(Cu) =;3.34 x 10(-4)), highlighting the importance of trapping sites at these;interfaces. DOI: 10.1103/PhysRevB.86.214109;3;1;0;0;3;1098-0121;WOS:000312674200002;;;J;McCash, Kevin;Srikanth, A.;Ponomareva, I.;Competing polarization reversal mechanisms in ferroelectric nanowires;PHYSICAL REVIEW B;86;21;214108;10.1103/PhysRevB.86.214108;DEC 20 2012;2012;Polarization reversal in ferroelectrics has been a subject of intense;interest for many years owing to both its scientific appeal and;practical utility. In recent years the interest has increased even;further thanks to the expectations of achieving ultrafast polarization;reversal at the nanoscale. While most of the studies up to now are;focused on the polarization reversal in ferroelectric thin films, we;report the intrinsic dynamics of ultrafast polarization reversal in;ferroelectric nanowires. Using atomistic first-principles-based;simulations, we trace the time evolution of polarization under applied;electric field to reveal the existence of two competing polarization;reversal mechanisms: (i) domain-driven and (ii) homogeneous. The;analysis of their microscopic origin allows us to postulate the;associated laws and leads to a deeper understanding of polarization;reversal dynamics in general. In addition, we find that in defect-free;nanowires the polarization reversal can occur within picoseconds, which;potentially is very promising for ultrafast memory and other;applications. DOI: 10.1103/PhysRevB.86.214108;Ponomareva, Inna/C-4067-2012;6;0;0;0;6;1098-0121;WOS:000312674200001;;;J;Silaev, M. A.;Volovik, G. E.;Topological Fermi arcs in superfluid He-3;PHYSICAL REVIEW B;86;21;214511;10.1103/PhysRevB.86.214511;DEC 20 2012;2012;We consider fermionic states bound on domain walls in a Weyl superfluid;He-3-A and on interfaces between He-3-A and a fully gapped topological;superfluid He-3-B. We demonstrate that in both cases the fermionic;spectrum contains Fermi arcs that are continuous nodal lines of energy;spectrum terminating at the projections of two Weyl points to the plane;of surface states in momentum space. The number of Fermi arcs is;determined by the index theorem that relates bulk values of the;topological invariant to the number of zero-energy surface states. The;index theorem is consistent with an exact spectrum of Bogolubov-de;Gennes equation obtained numerically, meanwhile, the quasiclassical;approximation fails to reproduce the correct number of zero modes. Thus;we demonstrate that topology describes the properties of the exact;spectrum beyond the quasiclassical approximation. DOI:;10.1103/PhysRevB.86.214511;8;0;0;0;8;1098-0121;WOS:000312674200006;;;J;Sluka, V.;Kakay, A.;Deac, A. M.;Buergler, D. E.;Hertel, R.;Schneider, C. M.;Quenched Slonczewski windmill in spin-torque vortex oscillators;PHYSICAL REVIEW B;86;21;214422;10.1103/PhysRevB.86.214422;DEC 20 2012;2012;We present a combined analytical and numerical study on double-vortex;spin-torque nano-oscillators and describe a mechanism that suppresses;the windmill modes. The magnetization dynamics is dominated by the;gyrotropic precession of the vortex in one of the ferromagnetic layers.;In the other layer, the vortex gyration is strongly damped. The;dominating layer for the magnetization dynamics is determined by the;sign of the product between sample current and the chiralities.;Measurements on Fe/Ag/Fe nanopillars support these findings. The results;open up a new perspective for building high quality-factor spin-torque;oscillators operating at selectable, well-separated frequency bands.;DOI: 10.1103/PhysRevB.86.214422;Deac, Alina/D-2961-2012; Buergler, Daniel/I-7408-2012; Kakay, Attila/B-7106-2008; Schneider, Claus/H-7453-2012;Buergler, Daniel/0000-0002-5579-4886; Kakay, Attila/0000-0002-3195-219X;;Schneider, Claus/0000-0002-3920-6255;4;0;0;0;4;1098-0121;WOS:000312674200005;;;J;Strohm, C.;Roth, T.;Detlefs, C.;van der Linden, P.;Mathon, O.;Element-selective magnetometry in ferrimagnetic erbium iron garnet;PHYSICAL REVIEW B;86;21;214421;10.1103/PhysRevB.86.214421;DEC 20 2012;2012;The emergence of a field induced canted phase below a critical;temperature is one of the characteristic properties of ferrimagnets with;two inequivalent antiferromagnetically coupled sublattices. Using x-ray;magnetic circular dichroism at the Fe K edge, we have performed element;selective magnetometry in ferrimagnetic erbium iron garnet in fields up;to 30 T. The signal from the tetrahedral Fe sites at 70 K allows the;detection of the two transitions at 10 and 23 T bounding the canted;phase and the direct observation of the reversal of the Fe-sublattice;magnetization within this phase. DOI: 10.1103/PhysRevB.86.214421;Detlefs, Carsten/B-6244-2008;Detlefs, Carsten/0000-0003-2573-2286;0;0;0;0;0;1098-0121;WOS:000312674200004;;;J;Yang, Huan;Wang, Zhenyu;Fang, Delong;Li, Sheng;Kariyado, Toshikaze;Chen, Genfu;Ogata, Masao;Das, Tanmoy;Balatsky, A. V.;Wen, Hai-Hu;Unexpected weak spatial variation in the local density of states induced;by individual Co impurity atoms in superconducting Na(Fe1-xCox)As;crystals revealed by scanning tunneling spectroscopy;PHYSICAL REVIEW B;86;21;214512;10.1103/PhysRevB.86.214512;DEC 20 2012;2012;We use spatially resolved scanning tunneling spectroscopy in;Na(Fe1-xCox)As to investigate the impurity effect induced by Co dopants.;The Co impurities are successfully identified, and the spatial;distributions of local density of state at different energies around;these impurities are investigated. It is found that the spectrum shows;negligible spatial variation at different positions near the Co;impurity, although there is a continuum of the in-gap states which lifts;the zero-bias conductance to a finite value. Our results put constraints;on the S +/- and S++ models and sharpen the debate on the role of;scattering potentials induced by the Co dopants. DOI:;10.1103/PhysRevB.86.214512;Das, Tanmoy/F-7174-2013;9;0;1;0;9;1098-0121;WOS:000312674200007;;;J;Chen, Gang;Hermele, Michael;Magnetic orders and topological phases from f-d exchange in pyrochlore;iridates;PHYSICAL REVIEW B;86;23;235129;10.1103/PhysRevB.86.235129;DEC 19 2012;2012;We study theoretically the effects of f-d magnetic exchange interaction;in the R2Ir2O7 pyrochlore iridates. The R3+ f electrons form localized;Kramers or non-Kramers doublets, while the Ir4+ d electrons are more;itinerant and feel a strong spin-orbit coupling. We construct and;analyze a minimal model capturing this physics, treating the Ir;subsystem using a Hubbard-type model. First neglecting the Hubbard;interaction, we find Weyl semimetal and Axion insulator phases induced;by the f-d exchange. Next, we find that f-d exchange can cooperate with;the Hubbard interaction to stabilize the Weyl semimetal over a larger;region of parameter space than when it is induced by d-electron;correlations alone. Applications to experiments are discussed. DOI:;10.1103/PhysRevB.86.235129;15;1;0;0;15;1098-0121;WOS:000312495500002;;;J;Hung, Ling-Yan;Wan, Yidun;String-net models with Z(N) fusion algebra;PHYSICAL REVIEW B;86;23;235132;10.1103/PhysRevB.86.235132;DEC 19 2012;2012;We study the Levin-Wen string-net model with a Z(N) type fusion algebra.;Solutions of the local constraints of this model correspond to Z(N);gauge theory and double Chern-Simons theories with quantum groups. For;the first time, we explicitly construct a spin-(N - 1)/2 model with Z(N);gauge symmetry on a triangular lattice as an exact dual model of the;string-net model with a Z(N) type fusion algebra on a honeycomb lattice.;This exact duality exists only when the spins are coupled to a Z(N);gauge field living on the links of the triangular lattice. The ungauged;Z(N) lattice spin models are a class of quantum systems that bear;symmetry-protected topological phases that may be classified by the;third cohomology group H-3(Z(N), U(1)) of Z(N). Our results apply also;to any case where the fusion algebra is identified with a finite group;algebra or a quantum group algebra. DOI: 10.1103/PhysRevB.86.235132;9;0;0;0;9;1098-0121;WOS:000312495500005;;;J;Husser, H.;Pehlke, E.;Analysis of two-photon photoemission from Si(001);PHYSICAL REVIEW B;86;23;235134;10.1103/PhysRevB.86.235134;DEC 19 2012;2012;We have applied our ab initio simulation approach for the photoemission;process at solid surfaces to calculate two-photon photoemission spectra;from the p(2 x 2)-reconstructed Si(001) surface. In this approach, the;ground-state electronic structure of the surface is obtained within;density functional theory. The subsequent time-dependent simulation is;carried through at frozen effective potential, while an optical;potential is applied to account for inelastic scattering in the excited;state. We have derived normal emission spectra for s-and p-polarized;light with photon energies in the range (h) over bar omega = 3.85-4.75;eV. The dependence of the theoretical spectra on photon energy and;polarization is analyzed and compared to experimental spectra from the;literature. To unravel the role of the unoccupied states between Fermi;energy and the vacuum level which are acting as intermediate states in;the excitation process, we investigate the expression for the two-photon;photocurrent from perturbation theory. The scattering states, which;serve as the final states of photoemission, are obtained from a;time-dependent simulation of a LEED-type experiment. The evaluation of;the dipole matrix elements allows us to identify the relevant bulk band;transitions and to address the influence of surface states. DOI:;10.1103/PhysRevB.86.235134;0;0;0;0;0;1098-0121;WOS:000312495500007;;;J;Jenkins, Gregory S.;Sushkov, Andrei B.;Schmadel, Don C.;Kim, M. -H.;Brahlek, Matthew;Bansal, Namrata;Oh, Seongshik;Drew, H. Dennis;Giant plateau in the terahertz Faraday angle in gated Bi2Se3;PHYSICAL REVIEW B;86;23;235133;10.1103/PhysRevB.86.235133;DEC 19 2012;2012;We report gated terahertz Faraday angle measurements on epitaxial Bi2Se3;thin films capped with In2Se3. A plateau is observed in the real part of;the Faraday angle at an onset gate voltage corresponding to no band;bending at the surface, which persists into accumulation. The plateau is;two orders of magnitude flatter than the step size expected from a;single Landau level in the low-frequency limit, quantized in units of;the fine structure constant. At 8 T, the plateau extends over a range of;gate voltage that spans an electron density greater than 14 times the;quantum flux density. Both the imaginary part of the Faraday angle and;transmission measurements indicate dissipative off-axis and longitudinal;conductivity channels associated with the plateau. DOI:;10.1103/PhysRevB.86.235133;6;0;0;0;6;1098-0121;WOS:000312495500006;;;J;Maciejko, Joseph;Qi, Xiao-Liang;Karch, Andreas;Zhang, Shou-Cheng;Models of three-dimensional fractional topological insulators;PHYSICAL REVIEW B;86;23;235128;10.1103/PhysRevB.86.235128;DEC 19 2012;2012;Time-reversal invariant three-dimensional topological insulators can be;defined fundamentally by a topological field theory with a quantized;axion angle theta of 0 or pi. It was recently shown that fractional;quantized values of theta are consistent with time-reversal invariance;if deconfined, gapped, fractionally charged bulk excitations appear in;the low-energy spectrum due to strong correlation effects, leading to;the concept of a fractional topological insulator. These fractionally;charged excitations are coupled to emergent gauge fields, which ensure;that the microscopic degrees of freedom, the original electrons, are;gauge-invariant objects. A first step towards the construction of;microscopic models of fractional topological insulators is to understand;the nature of these emergent gauge theories and their corresponding;phases. In this work, we show that low-energy effective gauge theories;of both Abelian or non-Abelian type are consistent with a fractional;quantized axion angle if they admit a Coulomb phase or a Higgs phase;with gauge group broken down to a discrete subgroup. The Coulomb phases;support gapless but electrically neutral bulk excitations while the;Higgs phases are fully gapped. The Higgs and non-Abelian Coulomb phases;exhibit multiple ground states on boundaryless spatial three-manifolds;with nontrivial first homology, while the Abelian Coulomb phase has a;unique ground state. The ground-state degeneracy receives an additional;contribution on manifolds with boundary due to the induced boundary;Chern-Simons term. DOI: 10.1103/PhysRevB.86.235128;Zhang, Shou-Cheng/B-2794-2010;6;0;0;0;6;1098-0121;WOS:000312495500001;;;J;Mikheev, E.;Stolichnov, I.;De Ranieri, E.;Wunderlich, J.;Trodahl, H. J.;Rushforth, A. W.;Riester, S. W. E.;Campion, R. P.;Edmonds, K. W.;Gallagher, B. L.;Setter, N.;Magnetic domain wall propagation under ferroelectric control;PHYSICAL REVIEW B;86;23;235130;10.1103/PhysRevB.86.235130;DEC 19 2012;2012;Control of magnetic domain walls (DWs) and their propagation is among;the most promising development directions for future information-storage;devices. The well-established tools for such manipulation are the;spin-torque transfer from electrical currents and strain. The focus of;this paper is an alternative concept based on the nonvolatile;ferroelectric field effect on DWs in a ferromagnet with carrier-mediated;exchange coupling. The integrated ferromagnet/ferroelectric structure;yields two superimposed ferroic patterns strongly coupled by an electric;field. Using this coupling, we demonstrate an easy-to-form, stable,;nondestructive, and electrically rewritable switch on magnetic domain;wall propagation. DOI: 10.1103/PhysRevB.86.235130;Stolichnov, Igor/B-3331-2014; Wunderlich, Joerg/G-6918-2014;Stolichnov, Igor/0000-0003-0606-231X;;2;0;0;0;2;1098-0121;WOS:000312495500003;;;J;Yamaoka, Hitoshi;Zekko, Yumiko;Kotani, Akio;Jarrige, Ignace;Tsujii, Naohito;Lin, Jung-Fu;Mizuki, Jun'ichiro;Abe, Hideki;Kitazawa, Hideaki;Hiraoka, Nozomu;Ishii, Hirofumi;Tsuei, Ku-Ding;Electronic transitions in CePd2Si2 studied by resonant x-ray emission;spectroscopy at high pressures and low temperatures;PHYSICAL REVIEW B;86;23;235131;10.1103/PhysRevB.86.235131;DEC 19 2012;2012;Temperature and pressure dependences of the electronic structure of the;heavy-fermion system CePd2Si2 have been investigated using partial;fluorescence yield x-ray absorption spectroscopy and resonant x-ray;emission spectroscopy at the Ce L-3 edge. The temperature dependence has;also been measured for CeRh2Si2 for comparison. In both compounds Ce is;in a weakly mixed valence state at ambient pressure, mostly f(1) with a;small contribution from the f(0) component. No temperature dependence of;the Ce valence is observed at temperatures as low as 8 K. In CePd2Si2 at;19 K, however, the Ce valence shows a continuous increase with pressure,;indicating pressure-induced delocalization of the 4f states. Theoretical;calculations based on the single impurity Anderson model reproduce the;experimental results well. Pressure dependence of the difference between;the ground state valence and the measured valence including the final;state effect is also discussed. DOI: 10.1103/PhysRevB.86.235131;Lin, Jung-Fu/B-4917-2011;3;0;0;0;3;1098-0121;WOS:000312495500004;;;J;Zolyomi, V.;Ivady, V.;Gali, A.;Enhancement of electron-nuclear hyperfine interaction at lattice defects;in semiconducting single-walled carbon nanotubes studied by ab initio;density functional theory calculations;PHYSICAL REVIEW B;86;23;235433;10.1103/PhysRevB.86.235433;DEC 19 2012;2012;We present a first principles study of the electron-nuclear;hyperfine-interaction (HF) in achiral single-walled carbon nanotubes;(SWCNTs). We show that while HF coupling is small in perfect nanotubes,;it is significantly enhanced near lattice defects such as vacancies and;Stone-Wales pairs. The enhancement of hyperfine coupling near the;defects varies considerably in different nanotubes which might pave the;way to simultaneously identifying the chirality of carbon nanotubes and;the defects inside them by sophisticated magnetic resonance techniques.;Charged vacancy is proposed as a candidate for solid state qubit in;semiconducting SWCNTs. DOI: 10.1103/PhysRevB.86.235433;0;0;0;0;0;1098-0121;WOS:000312495500008;;;J;Castro, M.;Gago, R.;Vazquez, L.;Munoz-Garcia, J.;Cuerno, R.;Stress-induced solid flow drives surface nanopatterning of silicon by;ion-beam irradiation;PHYSICAL REVIEW B;86;21;214107;10.1103/PhysRevB.86.214107;DEC 19 2012;2012;Ion-beam sputtering (IBS) is known to produce surface nanopatterns over;macroscopic areas on a wide range of materials. However, in spite of the;technological potential of this route to nanostructuring, the physical;process by which these surfaces self-organize remains poorly understood.;We have performed detailed experiments of IBS on Si substrates that;validate dynamical and morphological predictions from a hydrodynamic;description of the phenomenon. We introduce a systematic approach to;perform the experiments under conditions that guarantee the;applicability of a linear description, helping to clarify the;experimental framework in which theories should be tested. Among our;results, the pattern wavelength is experimentally seen to depend almost;linearly on ion energy, in agreement with existing results for other;targets that are amorphous or become so under irradiation. Our work;substantiates flow of a nanoscopically thin and highly viscous surface;layer, driven by the stress created by the ion beam, as an accurate;description of this class of systems.;Gago, Raul/C-6762-2008; VAZQUEZ, LUIS/A-1272-2009; Munoz-Garcia, Javier/C-1135-2011; Castro, Mario/A-3585-2009;Gago, Raul/0000-0003-4388-8241; VAZQUEZ, LUIS/0000-0001-6220-2810;;Castro, Mario/0000-0003-3288-6144;22;0;0;0;22;1098-0121;WOS:000312494800001;;;J;Fishman, Randy S.;Furukawa, Nobuo;Haraldsen, Jason T.;Matsuda, Masaaki;Miyahara, Shin;Identifying the spectroscopic modes of multiferroic BiFeO3;PHYSICAL REVIEW B;86;22;220402;10.1103/PhysRevB.86.220402;DEC 19 2012;2012;We have identified the modes of multiferroic BiFeO3 measured by THz and;Raman spectroscopies. Excellent agreement with the observed peaks is;obtained by including the effects of easy-axis anisotropy along the;direction of the electric polarization. By distorting the cycloidal spin;state, anisotropy splits the Psi(perpendicular to 1) mode into peaks at;20 and 21.5 cm(-1) and activates the lower Phi(+/- 2) mode at 27 cm(-1);(T = 200 K). An electromagnon is identified with the upper Psi(+/- 1);mode at 21.5 cm(-1). Our results also explain recent inelastic;neutron-scattering measurements. DOI:10.1103/PhysRevB.86.220402;Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013; Lujan Center, LANL/G-4896-2012;Haraldsen, Jason/0000-0002-8641-5412;;8;0;0;0;8;1098-0121;WOS:000312495200001;;;J;Geraedts, Scott D.;Motrunich, Olexei I.;Monte Carlo study of a U(1) x U(1) loop model with modular invariance;PHYSICAL REVIEW B;86;24;245121;10.1103/PhysRevB.86.245121;DEC 19 2012;2012;We study a U(1) x U(1) system in (2+1) dimensions with long-range;interactions and mutual statistics. The model has the same form after;the application of operations from the modular group, a property which;we call modular invariance. Using the modular invariance of the model,;we propose a possible phase diagram. We obtain a sign-free reformulation;of the model and study it in Monte Carlo. This study confirms our;proposed phase diagram. We use the modular invariance to analytically;determine the current-current correlation functions and conductivities;in all the phases in the diagram, as well as at special "fixed" points;which are unchanged by an operation from the modular group. We;numerically determine the order of the phase transitions, and find;segments of second-order transitions. For the statistical interaction;parameter theta = pi, these second-order transitions are evidence of a;critical loop phase obtained when both loops are trying to condense;simultaneously. We also measure the critical exponents of the;second-order transitions. DOI: 10.1103/PhysRevB.86.245121;1;0;0;0;1;1098-0121;WOS:000312495800003;;;J;Giering, Kay-Uwe;Salmhofer, Manfred;Self-energy flows in the two-dimensional repulsive Hubbard model;PHYSICAL REVIEW B;86;24;245122;10.1103/PhysRevB.86.245122;DEC 19 2012;2012;We study the two-dimensional repulsive Hubbard model by functional;renormalization group methods, using our recently proposed channel;decomposition of the interaction vertex. The main technical advance of;this work is that we calculate the full Matsubara frequency dependence;of the self-energy and the interaction vertex in the whole frequency;range without simplifying assumptions on its functional form, and that;the effects of the self-energy are fully taken into account in the;equations for the flow of the two-body vertex function. At Van Hove;filling, we find that the Fermi-surface deformations remain small at;fixed particle density and have a minor impact on the structure of the;interaction vertex. The frequency dependence of the self-energy,;however, turns out to be important, especially at a transition from;ferromagnetism to d-wave superconductivity. We determine;non-Fermi-liquid exponents at this transition point. DOI:;10.1103/PhysRevB.86.245122;14;0;0;0;14;1098-0121;WOS:000312495800004;;;J;Le Roux, Sebastien;Bouzid, Assil;Boero, Mauro;Massobrio, Carlo;Structural properties of glassy Ge2Se3 from first-principles molecular;dynamics;PHYSICAL REVIEW B;86;22;224201;10.1103/PhysRevB.86.224201;DEC 19 2012;2012;The structural properties of glassy Ge2Se3 were studied in the framework;of first-principles molecular dynamics by using the Becke-Lee-Yang-Parr;scheme for the treatment of the exchange-correlation functional in;density functional theory. Our results for the total neutron structure;factor and the total pair distribution function are in very good;agreement with the experimental results. When compared to the structural;description obtained for liquid Ge2Se3, glassy Ge2Se3 is found to be;characterized by a larger percentage of fourfold coordinated Ge atoms;and a lower number of miscoordinations. However, Ge-Ge homopolar bonds;inevitably occur due to the lack of Se atoms available, at this;concentration, to form GeSe4 tetrahedra. Focusing on the family of;glasses GexSe1-x, the present results allow a comparison to be carried;out in reciprocal and real space among three prototypical glassy;structures. The first was obtained at the stoichiometric composition;(glassy GeSe2), the second at a Se-rich composition (glassy GeSe4) and;the third at a Ge-rich composition (glassy Ge2Se3). All networks are;consistent with the "8 - N" rule, in particular, glassy GeSe4, which;exhibits the highest degree of chemical order. The electronic structure;of glassy Ge2Se3 has been characterized by using the Wannier localized;orbital formalism. The analysis of the Ge environment shows the presence;of dangling, ionocovalent Ge-Se, and covalent bonds, the latter related;to Ge-Ge connections. DOI: 10.1103/PhysRevB.86.224201;BOERO, Mauro/M-2358-2014;BOERO, Mauro/0000-0002-5052-2849;6;0;0;0;6;1098-0121;WOS:000312495200004;;;J;Matthews, M. J.;Castelnovo, C.;Moessner, R.;Grigera, S. A.;Prabhakaran, D.;Schiffer, P.;High-temperature onset of field-induced transitions in the spin-ice;compound Dy2Ti2O7;PHYSICAL REVIEW B;86;21;214419;10.1103/PhysRevB.86.214419;DEC 19 2012;2012;We have studied the field-dependent ac magnetic susceptibility of single;crystals of Dy2Ti2O7 spin ice along the [111] direction in the;temperature range 1.8-7 K. Our data reflect the onset of local spin-ice;order in the appearance of different field regimes. In particular, we;observe a prominent feature at approximately 1.0 T that is a precursor;of the low-temperature metamagnetic transition out of field-induced;kagome ice, below which the kinetic constraints imposed by the ice rules;manifest themselves in a substantial frequency dependence of the;susceptibility. Despite the relatively high temperatures, our results;are consistent with a monopole picture, and they demonstrate that such a;picture can give physical insight into spin-ice systems even outside the;low-temperature, low-density limit where monopole excitations are;well-defined quasiparticles.;6;2;0;0;6;1098-0121;WOS:000312494800002;;;J;Nuss, Martin;Heil, Christoph;Ganahl, Martin;Knap, Michael;Evertz, Hans Gerd;Arrigoni, Enrico;von der Linden, Andwolfgang;Steady-state spectra, current, and stability diagram of a quantum dot: A;nonequilibrium variational cluster approach;PHYSICAL REVIEW B;86;24;245119;10.1103/PhysRevB.86.245119;DEC 19 2012;2012;We calculate steady-state properties of a strongly correlated quantum;dot under voltage bias by means of nonequilibrium cluster perturbation;theory and the nonequilibrium variational cluster approach,;respectively. Results for the steady-state current are benchmarked;against data from accurate matrix product state based time evolution. We;show that for low to medium interaction strength, nonequilibrium cluster;perturbation theory already yields good results, while for higher;interaction strength the self-consistent feedback of the nonequilibrium;variational cluster approach significantly enhances the accuracy. We;report the current-voltage characteristics for different interaction;strengths. Furthermore we investigate the nonequilibrium local density;of states of the quantum dot and illustrate that within the variational;approach a linear splitting and broadening of the Kondo resonance is;predicted which depends on interaction strength. Calculations with;applied gate voltage, away from particle-hole symmetry, reveal that the;maximum current is reached at the crossover from the Kondo regime to the;doubly occupied or empty quantum dot. Obtained stability diagrams;compare very well to recent experimental data [A. V. Kretinin et al.,;Phys. Rev. B 84, 245316 (2011)]. DOI: 10.1103/PhysRevB.86.245119;Knap, Michael/H-3344-2011; Arrigoni, Enrico/E-4507-2012; Nuss, Martin/J-5674-2014;Knap, Michael/0000-0002-7093-9502; Arrigoni, Enrico/0000-0002-1347-3080;;;7;0;0;0;7;1098-0121;WOS:000312495800001;;;J;Rottler, Andreas;Krueger, Benjamin;Heitmann, Detlef;Pfannkuche, Daniela;Mendach, Stefan;Route towards cylindrical cloaking at visible frequencies using an;optimization algorithm;PHYSICAL REVIEW B;86;24;245120;10.1103/PhysRevB.86.245120;DEC 19 2012;2012;We derive a model based on the Maxwell-Garnett effective-medium theory;that describes a cylindrical cloaking shell composed of metal rods which;are radially aligned in a dielectric host medium. We propose and;demonstrate a minimization algorithm that calculates for given material;parameters the optimal geometrical parameters of the cloaking shell such;that its effective optical parameters fit the best to the required;permittivity distribution for cylindrical cloaking. By means of;sophisticated full-wave simulations we find that a cylindrical cloak;with good performance using silver as the metal can be designed with our;algorithm for wavelengths in the red part of the visible spectrum (623;nm < lambda < 773 nm). We also present a full-wave simulation of such a;cloak at an exemplary wavelength of lambda = 729 nm (h omega = 1.7 eV);which indicates that our model is useful to find design rules of cloaks;with good cloaking performance. Our calculations investigate a structure;that is easy to fabricate using standard preparation techniques and;therefore pave the way to a realization of guiding light around an;object at visible frequencies, thus rendering it invisible. DOI:;10.1103/PhysRevB.86.245120;Krueger, Benjamin/B-7466-2009;Krueger, Benjamin/0000-0001-8502-368X;0;0;0;0;0;1098-0121;WOS:000312495800002;;;J;Tokiwa, Y.;Huebner, S. -H.;Beck, O.;Jeevan, H. S.;Gegenwart, P.;Unique phase diagram with narrow superconducting dome in;EuFe2(As1-xPx)(2) due to Eu2+ local magnetic moments;PHYSICAL REVIEW B;86;22;220505;10.1103/PhysRevB.86.220505;DEC 19 2012;2012;The interplay between superconductivity and Eu2+ magnetic moments in;EuFe2(As1-xPx)(2) is studied with electrical resistivity measurements;under hydrostatic pressure on x = 0.13 and x = 0.18 single crystals. We;can map hydrostatic pressure to chemical pressure x and show that;superconductivity is confined to a very narrow range 0.18 <= x <= 0.23;in the phase diagram, beyond which ferromagnetic (FM) Eu ordering;suppresses superconductivity. The change from antiferro- to FM Eu;ordering at the latter concentration coincides with a Lifshitz;transition and the complete depression of iron magnetic order. DOI:;10.1103/PhysRevB.86.220505;6;0;0;0;6;1098-0121;WOS:000312495200002;;;J;Tran Doan Huan;Amsler, Maximilian;Vu Ngoc Tuoc;Willand, Alexander;Goedecker, Stefan;Low-energy structures of zinc borohydride Zn(BH4)(2);PHYSICAL REVIEW B;86;22;224110;10.1103/PhysRevB.86.224110;DEC 19 2012;2012;We present a systematic study of the low-energy structures of zinc;borohydride, a crystalline material proposed for the purpose of hydrogen;storage. In addition to previously proposed structures, many new;low-energy structures of zinc borohydride are found by utilizing;theminima-hopping method. We identify a new dynamically stable structure;which belongs to the I4(1)22 space group as the lowest-energy phase of;zinc borohydride at low temperatures. A low transition barrier between;I4(1)22 and P1, the two lowest-lying phases of zinc borohydride, is;predicted, implying that a coexistence of low-energy phases of zinc;borohydride is possible at ambient conditions. An analysis based on the;simulated x-ray-diffraction pattern reveals that the I4(1)22 structure;exhibits the same major features as the experimentally synthesized zinc;borohydride samples. DOI: 10.1103/PhysRevB.86.224110;Amsler, Maximilian/H-4718-2013; Tran, Huan/K-3587-2013;Tran, Huan/0000-0002-8093-9426;4;0;0;0;4;1098-0121;WOS:000312495200003;;;J;van den Berg, T. L.;Raymond, L.;Verga, A.;Enhanced spin Hall effect in strong magnetic disorder;PHYSICAL REVIEW B;86;24;245420;10.1103/PhysRevB.86.245420;DEC 19 2012;2012;We consider a two-dimensional electron gas in an inversion asymmetric;layer and in the presence of spatially distributed magnetic impurities.;We investigate the relationship between the geometrical properties of;the wave function and the system's spin-dependent transport properties.;A localization transition, arising when disorder is increased, is;exhibited by the appearance of a fractal state with finite inverse;participation ratio. Below the transition, interference effects modify;the carrier's diffusion, as revealed by the dependence on the scattering;time of the power law exponents characterizing the spreading of a wave;packet. Above the transition, in the strong disorder regime, we find;that the states are spin polarized and localized around the impurities.;A significant enhancement of the spin current develops in this regime.;DOI: 10.1103/PhysRevB.86.245420;RAYMOND, Laurent/B-6025-2008;RAYMOND, Laurent/0000-0002-5014-1333;0;0;0;0;0;1098-0121;WOS:000312495800005;;;J;Bauer, Oliver;Mercurio, Giuseppe;Willenbockel, Martin;Reckien, Werner;Schmitz, Christoph Heinrich;Fiedler, Benjamin;Soubatch, Serguei;Bredow, Thomas;Tautz, Frank Stefan;Sokolowski, Moritz;Role of functional groups in surface bonding of planar pi-conjugated;molecules;PHYSICAL REVIEW B;86;23;235431;10.1103/PhysRevB.86.235431;DEC 18 2012;2012;The trends in the bonding mechanism of 3,4,9,10-perylenetetracarboxylic;acid dianhydride (PTCDA) to the Ag(111), Ag(100), and Ag(110) surfaces;were analyzed on the basis of data obtained from x-ray standing waves;and dispersion-corrected density functional theory. Of importance are;the attractive local O-Ag bonds on the anhydride groups. They are the;shorter, the more open the surface is, and lead even to partly repulsive;interactions between the perylene core and the surface. In parallel,;there is an increasing charge donation from the Ag surface into the pi;system of the PTCDA. This synergism explains the out-of-plane distortion;of the adsorbed PTCDA and the surface buckling. DOI:;10.1103/PhysRevB.86.235431;13;1;0;0;13;1098-0121;WOS:000312445200001;;;J;Saptsov, R. B.;Wegewijs, M. R.;Fermionic superoperators for zero-temperature nonlinear transport:;Real-time perturbation theory and renormalization group for Anderson;quantum dots;PHYSICAL REVIEW B;86;23;235432;10.1103/PhysRevB.86.235432;DEC 18 2012;2012;We study electron quantum transport through a strongly interacting;Anderson quantum dot at finite bias voltage and magnetic field at zero;temperature using the real-time renormalization group (RT-RG) in the;framework of a kinetic (generalized master) equation for the reduced;density operator. To this end, we further develop the general,;finite-temperature real-time transport formalism by introducing field;superoperators that obey fermionic statistics. This direct second;quantization in Liouville Fock space strongly simplifies the;construction of operators and superoperators that transform irreducibly;under the Anderson-model symmetry transformations. The fermionic field;superoperators naturally arise from the univalence (fermion-parity);superselection rule of quantum mechanics for the total system of quantum;dot plus reservoirs. Expressed in these field superoperators, the causal;structure of the perturbation theory for the effective time-evolution;superoperator kernel becomes explicit. Using the constraints of the;causal structure, we construct a parametrization of the exact effective;time-evolution kernel for which we analytically find the eigenvectors;and eigenvalues in terms of a minimal set of only 30 independent;coefficients. The causal structure also implies the existence of a;fermion-parity protected eigenvector of the exact Liouvillian,;explaining a recently reported result on adiabatic driving;[Contreras-Pulido et al., Phys. Rev. B 85, 075301 (2012)] and;generalizing it to arbitrary order in the tunnel coupling Gamma.;Furthermore, in the wide-band limit, the causal representation;exponentially reduces the number of diagrams for the time-evolution;kernel. The remaining diagrams can be identified simply by their;topology and are manifestly independent of the energy cutoff term by;term. By an exact reformulation of this series, we integrate out all;infinite-temperature effects, obtaining an expansion targeting only the;nontrivial, finite-temperature corrections, and the exactly conserved;transport current follows directly from the time-evolution kernel. From;this new series, the previously formulated RT-RG equations are obtained;naturally. We perform a complete one-plus-two-loop RG analysis at finite;voltage and magnetic field, while systematically accounting for the;dependence of all renormalized quantities on both the quantum dot and;reservoir frequencies. Using the second quantization in Liouville space;and symmetry restrictions, we obtain analytical RT-RG equations, which;can be solved numerically in an efficient way, and we extensively study;the model parameter space, excluding the Kondo regime where the;one-plus-two-loop approach is obviously invalid. The incorporated;renormalization effects result in an enhancement of the inelastic;cotunneling peak, even at a voltage similar to magnetic field similar to;tunnel coupling Gamma. Moreover, we find a tunnel-induced nonlinearity;of the stability diagrams (Coulomb diamonds) at finite voltage, both in;the single-electron tunneling and inelastic cotunneling regime. DOI:;10.1103/PhysRevB.86.235432;Wegewijs, Maarten/A-3512-2012;Wegewijs, Maarten/0000-0002-2972-3822;9;0;0;0;9;1098-0121;WOS:000312445200002;;;J;Tyrrell, E. J.;Smith, J. M.;Effective mass modeling of excitons in type-II quantum dot;heterostructures (vol 84, 165328, 2011);PHYSICAL REVIEW B;86;23;239905;10.1103/PhysRevB.86.239905;DEC 18 2012;2012;0;0;0;0;0;1098-0121;WOS:000312445200003;;;J;Buividovich, P. V.;Polikarpov, M. I.;Monte Carlo study of the electron transport properties of monolayer;graphene within the tight-binding model;PHYSICAL REVIEW B;86;24;245117;10.1103/PhysRevB.86.245117;DEC 18 2012;2012;We study the effect of Coulomb interaction between charge carriers on;the properties of graphene monolayer, assuming that the strength of the;interaction is controlled by the dielectric permittivity of the;substrate on which the graphene layer is placed. To this end, we;consider the tight-binding model on the hexagonal lattice coupled to the;noncompact gauge field. The action of the latter is also discretized on;the hexagonal lattice. Equilibrium ensembles of gauge field;configurations are obtained using the hybrid Monte Carlo algorithm. Our;numerical results indicate that at sufficiently strong coupling, that;is, at sufficiently small substrate dielectric permittivities epsilon;less than or similar to 4 and at sufficiently small temperatures T less;than or similar to 1 x 10(4) K, the symmetry between simple sublattices;of hexagonal lattice breaks down spontaneously and the low-frequency;conductivity gradually decreases down to 20-30% of its weak-coupling;value. On the other hand, in the weak-coupling regime (with epsilon;greater than or similar to 4), the conductivity practically does not;depend on epsilon and is close to the universal value sigma(0) = 1/4.;DOI: 10.1103/PhysRevB.86.245117;15;0;0;0;15;1098-0121;WOS:000312445700002;;;J;Cheng, Ran;Niu, Qian;Electron dynamics in slowly varying antiferromagnetic texture;PHYSICAL REVIEW B;86;24;245118;10.1103/PhysRevB.86.245118;DEC 18 2012;2012;Adiabatic dynamics of conduction electrons in antiferromagnetic (AFM);materials with slowly varying spin texture is developed. Quite different;from the ferromagnetic (FM) case, adiabaticity in AFM texture does not;imply perfect alignment of conduction electron spins with background;profile, instead, it introduces an internal dynamics between degenerate;bands. As a result, the orbital motion of conduction electrons becomes;spin dependent and is affected by two emergent gauge fields: one of them;is the non-Abelian version of what has been discovered in FM systems;;the other leads to an anomalous velocity that has no FM counterpart. Two;examples with experimental predictions are provided. DOI:;10.1103/PhysRevB.86.245118;Niu, Qian/G-9908-2013; Cheng, Ran/M-9260-2014;Cheng, Ran/0000-0003-0166-2172;12;0;0;0;12;1098-0121;WOS:000312445700003;;;J;Cuadrado, R.;Chantrell, R. W.;Electronic and magnetic properties of bimetallic L1(0) cuboctahedral;clusters by means of fully relativistic density-functional-based;calculations;PHYSICAL REVIEW B;86;22;224415;10.1103/PhysRevB.86.224415;DEC 18 2012;2012;By means of density functional theory and the generalized gradient;approximation, we present a structural, electronic, and magnetic study;of FePt-, CoPt-, FeAu-, and FePd-based L1(0) ordered cuboctahedral;nanoparticles, with total numbers of atoms N-tot = 13, 55, 147. After a;conjugate gradient relaxation, the nanoparticles retain their L1(0);symmetry, but the small displacements of the atomic positions tune the;electronic and magnetic properties. The value of the total magnetic;moment stabilizes as the size increases. We also show that the magnetic;anisotropy energy (MAE) depends on the size as well as the position of;the Fe-atomic planes in the clusters. We address the influence on the;MAE of the surface shape, finding a small in-plane MAE for (Fe,;Co)(24)Pt-31 nanoparticles. DOI: 10.1103/PhysRevB.86.224415;7;0;0;0;7;1098-0121;WOS:000312445000002;;;J;Deisenhofer, J.;Schaile, S.;Teyssier, J.;Wang, Zhe;Hemmida, M.;von Nidda, H. -A. Krug;Eremina, R. M.;Eremin, M. V.;Viennois, R.;Giannini, E.;van der Marel, D.;Loidl, A.;Electron spin resonance and exchange paths in the orthorhombic dimer;system Sr2VO4;PHYSICAL REVIEW B;86;21;214417;10.1103/PhysRevB.86.214417;DEC 18 2012;2012;We report on susceptibility and electron spin resonance (ESR);measurements at X- and Q-band frequencies of Sr2VO4 with orthorhombic;symmetry. In this dimer system, the V4+ ions are in tetrahedral;environment and are coupled by an antiferromagnetic intradimer exchange;constant J/k(B) approximate to 100 K to form a singlet ground state;without any phase transitions between room temperature and 2 K. Based on;an extended Huckel tight-binding analysis, we identify the strongest;exchange interaction to occur between two inequivalent vanadium sites;via two intermediate oxygen ions. The ESR absorption spectra can be well;fitted by a single Lorentzian line and the temperature dependence of the;ESR intensity, and the dc susceptibility can be modeled by using the;Bleaney-Bowers approach for independent dimers. The temperature;dependence of the ESR linewidth at X-band frequency can be modeled by a;superposition of a linear increase with temperature with a slope alpha =;1.35 Oe/K and a thermally activated behavior with an activation energy;Delta/k(B) = 1418 K, both of which point to spin-phonon coupling as the;dominant relaxation mechanism in this compound.;Teyssier, Jeremie/A-6867-2013; Deisenhofer, Joachim/G-8937-2011;Deisenhofer, Joachim/0000-0002-7645-9390;3;0;0;0;3;1098-0121;WOS:000312444700001;;;J;Hsu, Chen-Hsuan;Wang, Zhiqiang;Chakravarty, Sudip;Spin dynamics of possible density wave states in the pseudogap phase of;high-temperature superconductors;PHYSICAL REVIEW B;86;21;214510;10.1103/PhysRevB.86.214510;DEC 18 2012;2012;In a recent inelastic neutron scattering experiment in the pseudogap;state of the high-temperature superconductor YBa2Cu3O6.6, an unusual;"vertical" dispersion of the spin excitations with a large in-plane;anisotropy was observed. In this paper, we discuss in detail the spin;susceptibility of the singlet d-density wave, the triplet d-density wave;as well as the more common spin density wave orders with hopping;anisotropies. From numerical calculations within the framework of random;phase approximation, we find nearly vertical dispersion relations for;spin excitations with anisotropic incommensurability at low energy omega;<= 90 meV, which are reminiscent of the experiments. At very high energy;omega >= 165 meV, we also find energy-dependent incommensurability.;Although there are some important differences between the three cases,;unpolarized neutron measurements cannot discriminate between these;alternate possibilities; the vertical dispersion, however, is a distinct;feature of all three density wave states in contrast to the;superconducting state, which shows an hour-glass shape dispersion.;0;0;0;0;0;1098-0121;WOS:000312444700003;;;J;Jain, S.;Schultheiss, H.;Heinonen, O.;Fradin, F. Y.;Pearson, J. E.;Bader, S. D.;Novosad, V.;Coupled vortex oscillations in mesoscale ferromagnetic double-disk;structures;PHYSICAL REVIEW B;86;21;214418;10.1103/PhysRevB.86.214418;DEC 18 2012;2012;Coupled resonance modes in connected ferromagnetic double-dot structures;have been investigated as a function of the overlap between the dots,;both experimentally and via micromagnetic simulations. An asymmetry is;observed in the frequency spectrum about zero field. Softening of the;magnetization during vortex core precession when the cores are near the;overlap region results in low-frequency modes and a splitting;corresponding to different polarity combinations. A range of vortex;resonance frequencies are identified that can be tuned by varying the;overlap area. This study provides insight into the control of the;dynamic response in coupled mesoscale magnetic structures.;Jain, Shikha/J-4734-2012; Novosad, Valentyn/C-2018-2014;7;0;0;0;7;1098-0121;WOS:000312444700002;;;J;Kim, Isaac H.;Perturbative analysis of topological entanglement entropy from;conditional independence;PHYSICAL REVIEW B;86;24;245116;10.1103/PhysRevB.86.245116;DEC 18 2012;2012;We use the structure of conditionally independent states to analyze the;stability of topological entanglement entropy. For the ground state of;the quantum double or Levin-Wen model, we obtain a bound on the;first-order perturbation of topological entanglement entropy in terms of;its energy gap and subsystem size. The bound decreases superpolynomially;with the size of the subsystem, provided the energy gap is nonzero. We;also study the finite-temperature stability of stabilizer models, for;which we prove a stronger statement than the strong subadditivity of;entropy. Using this statement and assuming (i) finite correlation length;and (ii) small conditional mutual information of certain configurations,;first-order perturbation effect for arbitrary local perturbation can be;bounded. We discuss the technical obstacles in generalizing these;results. DOI: 10.1103/PhysRevB.86.245116;4;0;0;0;4;1098-0121;WOS:000312445700001;;;J;Metelmann, A.;Brandes, T.;Transport through single-level systems: Spin dynamics in the;nonadiabatic regime;PHYSICAL REVIEW B;86;24;245317;10.1103/PhysRevB.86.245317;DEC 18 2012;2012;We investigate the Fano-Anderson model coupled to a large ensemble of;spins under the influence of an external magnetic field. The interaction;between the two spin systems is treated within a mean-field approach,;and we assume an anisotropic coupling between these two systems. By;using a nonadiabatic approach, we make no further approximations in the;theoretical description of our system, apart from the semiclassical;treatment. Therewith, we can include the short-time dynamics as well as;the broadening of the energy levels arising due to the coupling to the;external electronic reservoirs. We study the spin dynamics in the regime;of low and high bias. For the infinite bias case, we compare our results;to those obtained from a simpler rate equation approach, where;higher-order transitions are neglected. We show that these higher-order;terms are important in the range of low magnetic field. Additionally, we;analyze extensively the finite bias regime with methods from nonlinear;dynamics, and we discuss the possibility of switching of the large spin.;DOI: 10.1103/PhysRevB.86.245317;2;0;0;0;2;1098-0121;WOS:000312445700004;;;J;Nastar, M.;Soisson, F.;Atomistic modeling of phase transformations: Point-defect concentrations;and the time-scale problem;PHYSICAL REVIEW B;86;22;220102;10.1103/PhysRevB.86.220102;DEC 18 2012;2012;The time scale of diffusive phase transformations in alloys depends on;point-defect concentrations, which evolve with the microstructure. We;present a simple method that provides a physical time scale for;atomistic simulations of such transformations, even when performed with;constant point-defect numbers. It also gives an on-the-fly evaluation of;the real point-defect concentration, when equilibrium conditions are;fulfilled. The method is applied to kinetic Monte Carlo simulations of;precipitation in binary alloys occurring by vacancy diffusion. The;vacancy concentration is found to be very dependent on the difference in;formation energy between the matrix and the precipitates, and therefore;on the composition and volume fraction of these two phases. The effect;of the interface curvature, through a Gibbs-Thomson effect, is revealed.;A mean-field approximation is also developed for computing the;point-defect concentrations. Contrary to previous models, it takes into;account the short range order in nonideal and concentrated solutions.;Atomistic simulations and mean-field simulations are validated by direct;comparisons. DOI: 10.1103/PhysRevB.86.220102;soisson, frederic/B-2917-2009;soisson, frederic/0000-0001-6435-6119;6;0;0;0;6;1098-0121;WOS:000312445000001;;;J;Abd El-Fattah, Z. M.;Matena, M.;Corso, M.;Ormaza, M.;Ortega, J. E.;Schiller, F.;Modifying the Cu(111) Shockley surface state by Au alloying;PHYSICAL REVIEW B;86;24;245418;10.1103/PhysRevB.86.245418;DEC 17 2012;2012;The deposition of submonolayer amounts of Au onto Cu(111) results in a;Au-Cu surface alloy with temperature- and thickness-dependent;stoichiometry. Upon alloying, the characteristic Shockley state of;Cu(111) is modified, shifting to 0.53 eV binding energy for a particular;surface Au2Cu concentration, which is a very high binding energy for a;noble-metal surface. Based on a phase accumulation model analysis, we;discuss how this unusually large shift is likely reflecting an effective;increase in the topmost layer thickness of the order of, but smaller;than, the value expected from the moire undulation. DOI:;10.1103/PhysRevB.86.245418;CSIC-UPV/EHU, CFM/F-4867-2012; ortega, enrique/I-4445-2012; Corso, Martina/B-7768-2014; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000312365800013;;;J;Baledent, V.;Rullier-Albenque, F.;Colson, D.;Monaco, G.;Rueff, J. -P.;Stability of the Fe electronic structure through temperature-, doping-,;and pressure-induced transitions in the BaFe2As2 superconductors;PHYSICAL REVIEW B;86;23;235123;10.1103/PhysRevB.86.235123;DEC 17 2012;2012;We report on a survey of Fe electronic properties in the;temperature-pressure phase diagram of the Co-doped pnictides BaFe2As2;superconductors by hard x-ray absorption spectroscopy at the Fe K edge;in the high-resolution, partial fluorescence yield mode. The absorption;spectra are found remarkably stable through the temperature-induced;phase transitions while pressure leads to slight energy shift of the;main edge but not of the pre-edge. The latter effect is ascribed to the;lattice compression and band widening effects under pressure as;confirmed by multiple scattering simulations. Our results suggest that;from the Fe electronic structure point of view, doping and pressure are;equivalent ways to destabilize the magnetic phase to the advantage of;superconductivity. DOI: 10.1103/PhysRevB.86.235123;0;0;0;0;0;1098-0121;WOS:000312365200003;;;J;Bejas, Matias;Greco, Andres;Yamase, Hiroyuki;Possible charge instabilities in two-dimensional doped Mott insulators;PHYSICAL REVIEW B;86;22;224509;10.1103/PhysRevB.86.224509;DEC 17 2012;2012;Motivated by the growing evidence of the importance of charge;fluctuations in the pseudogap phase in high-temperature cuprate;superconductors, we apply a large-N expansion formulated in a path;integral representation of the two-dimensional t - J model on a square;lattice. We study all possible charge instabilities of the paramagnetic;state in leading order of the 1/N expansion. While the d-wave charge;density wave (flux phase) becomes the leading instability for various;choices of model parameters, we find that a d-wave Pomeranchuk;(electronic nematic phase) instability occurs as a next leading one. In;particular, the nematic state has a strong tendency to become;inhomogeneous. In the presence of a large second nearest-neighbor;hopping integral, the flux phase is suppressed and the electronic;nematic instability becomes leading in a high doping region. Besides;these two major instabilities, bond-order phases occur as weaker;instabilities close to half-filling. Phase separation is also detected;in a finite temperature region near half-filling. DOI:;10.1103/PhysRevB.86.224509;7;0;0;0;7;1098-0121;WOS:000312364700006;;;J;Chen, S. L.;Chen, W. M.;Buyanova, I. A.;Zeeman splitting and dynamics of an isoelectronic bound exciton near the;band edge of ZnO;PHYSICAL REVIEW B;86;23;235205;10.1103/PhysRevB.86.235205;DEC 17 2012;2012;Comprehensive time-resolved photoluminescence and magneto-optical;measurements are performed on a bound exciton (BX) line peaking at;3.3621 eV (labeled as I*). Though the energy position of I* lies within;the same energy range as that for donor bound exciton (DX) transitions,;its behavior in an applied magnetic field is found to be distinctly;different from that observed for DXs bound to either ionized or neutral;donors. An exciton bound to an isoelectronic center with a;hole-attractive local potential is shown to provide a satisfactory model;that can account for all experimental results of the I* transition. DOI:;10.1103/PhysRevB.86.235205;Chen, Weimin/J-4660-2012;Chen, Weimin/0000-0002-6405-9509;5;0;0;0;5;1098-0121;WOS:000312365200008;;;J;Chen, Zuhuang;Zou, Xi;Ren, Wei;You, Lu;Huang, Chuanwei;Yang, Yurong;Yang, Ping;Wang, Junling;Sritharan, Thirumany;Bellaiche, L.;Chen, Lang;Study of strain effect on in-plane polarization in epitaxial BiFeO3 thin;films using planar electrodes;PHYSICAL REVIEW B;86;23;235125;10.1103/PhysRevB.86.235125;DEC 17 2012;2012;Epitaxial strain plays an important role in determining physical;properties of perovskite ferroelectric oxide thin films because of the;inherent coupling between the strain and the polarization. However, it;is very challenging to directly measure properties such as polarization;in ultrathin strained films, using traditional sandwich capacitor;devices, because of high leakage current. Hence, a planar electrode;device with different crystallographical orientations between;electrodes, which is able to measure the polarization response with;different electric field orientation, is used successfully in this work;to directly measure the in-plane polarization-electric-field (P-E);hysteresis loops in fully strained thin films. We used BiFeO3 (BFO) as a;model system and measured in-plane P-E loops not only in the;rhombohedral-like (R-like) BFO thin films but also in largely strained;BFO films exhibiting the pure tetragonal-like (T-like) phase. The exact;magnitude and direction of the spontaneous polarization vector of the;T-like phase is deduced thanks to the collection of in-plane;polarization components along different orientations. It is also shown;that the polarization vector in the R-like phase of BiFeO3 is;constrained to lie within the (1 (1) over bar 10) plane and rotates from;the [111] towards the [001] pseudocubic direction when the compressive;strain is increased from zero. At high misfit strains such as -4.4%, the;pure T-like phase is obtained and its polarization vector is constrained;to lie in the (010) plane with a significantly large in-plane component,;similar to 44 mu C/cm(2). First-principles calculations are carried out;in parallel, and provide a good agreement with the experimental results.;DOI: 10.1103/PhysRevB.86.235125;CHEN, LANG/A-2251-2011; You, Lu/H-1512-2011; Ren, Wei/D-2081-2009; HUANG, CHUANWEI/F-9858-2011; WANG, Junling/B-3596-2009; Yang, Ping/C-5612-2008; Chen, Zuhuang/E-7131-2011; Sritharan, Thirumany/G-4890-2010;WANG, Junling/0000-0003-3663-7081; Chen, Zuhuang/0000-0003-1912-6490;;8;1;0;0;8;1098-0121;WOS:000312365200005;;;J;Croitoru, M. D.;Buzdin, A. I.;Extended Lawrence-Doniach model: The temperature evolution of the;in-plane magnetic field anisotropy;PHYSICAL REVIEW B;86;22;224508;10.1103/PhysRevB.86.224508;DEC 17 2012;2012;Using the quasiclassical formalism, we provide the description of the;temperature and field-direction dependence of the in-plane upper;critical field in layered superconductors, taking into account the;interlayer Josephson coupling and the paramagnetic spin splitting. We;generalize the Lawrence-Doniach model for the case of high magnetic;fields and show that the reentrant superconductivity is naturally;described by our formalism when neglecting the Pauli pair-breaking;effect. We demonstrate that in layered superconductors the in-plane;anisotropy of the onset of superconductivity exhibits four different;temperature regimes: from the Ginzburg-Landau type in the vicinity of;the critical temperature T-c0 with anisotropies of coherence lengths, up;to the Fulde-Ferell-Larkin-Ovchinnikov type induced by the strong;interference between the modulation vector and the orbital effect. Our;results are in agreement with the experimental measurements of the;field-angle dependence of the superconducting onset temperature of the;organic compound (TMTSF)(2)ClO4. DOI: 10.1103/PhysRevB.86.224508;Buzdin, Alexander/I-6038-2013; Croitoru, Mihail/J-9934-2014;Croitoru, Mihail/0000-0002-3014-8634;3;0;0;0;3;1098-0121;WOS:000312364700005;;;J;Dhital, Chetan;Abernathy, D. L.;Zhu, Gaohua;Ren, Zhifeng;Broido, D.;Wilson, Stephen D.;Inelastic neutron scattering study of phonon density of states in;nanostructured Si1-xGex thermoelectrics;PHYSICAL REVIEW B;86;21;214303;10.1103/PhysRevB.86.214303;DEC 17 2012;2012;Inelastic neutron scattering measurements are utilized to explore;relative changes in the generalized phonon density of states of;nanocrystalline Si1-xGex thermoelectric materials prepared via;ball-milling and hot-pressing techniques. Dynamic signatures of Ge;clustering can be inferred from the data by referencing the resulting;spectra to a density functional theoretical model assuming homogeneous;alloying via the virtual-crystal approximation. Comparisons are also;presented between as-milled Si nanopowder and bulk, polycrystalline Si;where a preferential low-energy enhancement and lifetime broadening of;the phonon density of states appear in the nanopowder. Negligible;differences are however observed between the phonon spectra of bulk Si;and hot-pressed, nanostructured Si samples suggesting that changes to;the single-phonon dynamics above 4 meV play only a secondary role in the;modified heat conduction of this compound.;BL18, ARCS/A-3000-2012; Abernathy, Douglas/A-3038-2012; Ren, Zhifeng/B-4275-2014;1;0;0;0;1;1098-0121;WOS:000312364200002;;;J;Farahani, S. K. Vasheghani;Veal, T. D.;Sanchez, A. M.;Bierwagen, O.;White, M. E.;Gorfman, S.;Thomas, P. A.;Speck, J. S.;McConville, C. F.;Influence of charged-dislocation density variations on carrier mobility;in heteroepitaxial semiconductors: The case of SnO2 on sapphire;PHYSICAL REVIEW B;86;24;245315;10.1103/PhysRevB.86.245315;DEC 17 2012;2012;In highly mismatched heteroepitaxial systems, the influence of carrier-;and dislocation-density variations on carrier mobility is revealed.;Transmission electronmicroscopy reveals the variation of dislocation;density through a series of SnO2 films grown by molecular-beam epitaxy;on sapphire substrates where the lattice mismatch exceeds 11%. A;layer-by-layer parallel conduction treatment of the carrier mobility in;SnO2 epilayers is used to illustrate the dominant role of the;depth-dependent dislocation density and charge profile in determining;the film-thickness dependence of the transport properties.;Thomas, Pam/G-3532-2010; Sanchez, Ana/F-3153-2010;Sanchez, Ana/0000-0002-8230-6059;0;0;0;0;0;1098-0121;WOS:000312365800009;;;J;Ferraz, Alvaro;Kochetov, Evgeny;Comment on "Fermi surface reconstruction in hole-doped t-J models;without long-range antiferromagnetic order";PHYSICAL REVIEW B;86;24;247103;10.1103/PhysRevB.86.247103;DEC 17 2012;2012;0;0;0;0;0;1098-0121;WOS:000312365800015;;;J;Frimmer, Martin;Koenderink, A. Femius;Superemitters in hybrid photonic systems: A simple lumping rule for the;local density of optical states and its breakdown at the unitary limit;PHYSICAL REVIEW B;86;23;235428;10.1103/PhysRevB.86.235428;DEC 17 2012;2012;We theoretically investigate how the enhancement of the radiative decay;rate of a spontaneous emitter provided by coupling to an optical antenna;is modified when this "superemitter" is introduced into a complex;photonic environment that provides an enhanced local density of optical;states (LDOS) itself, such as a microcavity or stratified medium. We;show that photonic environments with increased LDOS further boost the;performance of antennas that scatter weakly, for which a simple;multiplicative LDOS lumping rule holds. In contrast, enhancements;provided by antennas close to the unitary limit, i.e., close to the;limit of maximally possible scattering strength, are strongly reduced by;an enhanced LDOS of the environment. Thus, we identify multiple;scattering in hybrid photonic systems as a powerful mechanism for LDOS;engineering. DOI: 10.1103/PhysRevB.86.235428;Koenderink, A. Femius/A-3955-2008;Koenderink, A. Femius/0000-0003-1617-5748;7;0;0;0;7;1098-0121;WOS:000312365200011;;;J;Gasparinetti, S.;Kamleitner, I.;Coherent Cooper-pair pumping by magnetic flux control;PHYSICAL REVIEW B;86;22;224510;10.1103/PhysRevB.86.224510;DEC 17 2012;2012;We introduce and discuss a scheme for Cooper-pair pumping. The scheme;relies on the coherent transfer of a superposition of charge states;across a superconducting island and is realized by adiabatic;manipulation of magnetic fluxes. Differently from previous;implementations, it does not require any modulation of electrostatic;potentials. We find a peculiar dependence of the pumped charge on the;superconducting phase bias across the pump and that an arbitrarily large;amount of charge can be pumped in a single cycle when the phase bias is;pi. We explain these features and their relation to the adiabatic;theorem. DOI: 10.1103/PhysRevB.86.224510;Gasparinetti, Simone/C-2991-2014;Gasparinetti, Simone/0000-0002-7238-693X;3;0;0;0;3;1098-0121;WOS:000312364700007;;;J;Gu, B.;Ziman, T.;Maekawa, S.;Theory of the spin Hall effect, and its inverse, in a ferromagnetic;metal near the Curie temperature;PHYSICAL REVIEW B;86;24;241303;10.1103/PhysRevB.86.241303;DEC 17 2012;2012;We give a theory of the inverse spin Hall effect (ISHE) in ferromagnetic;metals based on skew scattering via collective spin fluctuations. This;extends Kondo's theory of the anomalous Hall effect (AHE) to include;short-range spin-spin correlations. We find a relation between the ISHE;and the four-spin correlations near the Curie temperature T-C. Such;four-spin correlations do not contribute to the AHE, which relates to;the three-spin correlations. Thus our theory shows an essential;difference between the AHE and ISHE, providing an essential complement;to Kondo's classic theory of the AHE in metals. We note the relation to;skew-scattering mechanisms based on impurity scattering. Our theory can;be compared to recent experimental results by Wei et al. [Nat. Commun.;3, 1058 (2012)] for the ISHE in ferromagnetic alloys. DOI:;10.1103/PhysRevB.86.241303;Gu, Bo/B-6145-2011;Gu, Bo/0000-0003-2216-8413;1;0;0;0;1;1098-0121;WOS:000312365800003;;;J;Guedes, E. B.;Abbate, M.;Ishigami, K.;Fujimori, A.;Yoshimatsu, K.;Kumigashira, H.;Oshima, M.;Vicentin, F. C.;Fonseca, P. T.;Mossanek, R. J. O.;Core level and valence band spectroscopy of SrRuO3: Electron correlation;and covalence effects;PHYSICAL REVIEW B;86;23;235127;10.1103/PhysRevB.86.235127;DEC 17 2012;2012;We studied the electronic structure of SrRuO3 using several;spectroscopic techniques. These include ( resonant) photoemission, x-ray;absorption, and optical conductivity. The experimental results were;interpreted using an extended cluster model, which takes into account;electron correlation and the Ru 4d-O 2p covalence. The analysis shows;that this material is in the negative charge transfer regime, where the;ground state is dominated by the 4d(5) (L) under bar configuration with;an occupation of 47%. This is mainly due to the relatively large crystal;field and exchange splitting in the Ru 4d states. The electronic;structure of SrRuO3 is strongly influenced by the Ru 4d-O 2p;hybridization. Thus, the oxygen states should be explicitly considered;in the analysis of the physical properties of this system. However,;correlation effects are also important in this system giving rise to the;coherent peak in the valence band spectra. DOI:;10.1103/PhysRevB.86.235127;Mossanek, Rodrigo /E-8113-2010;1;0;0;0;1;1098-0121;WOS:000312365200007;;;J;Gull, E.;Millis, A. J.;Energetics of superconductivity in the two-dimensional Hubbard model;PHYSICAL REVIEW B;86;24;241106;10.1103/PhysRevB.86.241106;DEC 17 2012;2012;The energetics of the interplay between superconductivity and the;pseudogap in high-temperature superconductivity is examined using the;eight-site dynamical cluster approximation to the two-dimensional;Hubbard model. Two regimes of superconductivity are found: a;weak-coupling/large-doping regime in which the onset of;superconductivity causes a reduction in potential energy and an increase;in kinetic energy, and a strong-coupling regime in which;superconductivity is associated with an increase in potential energy and;a decrease in kinetic energy. The crossover between the two regimes is;found to coincide with the boundary of the normal-state pseudogap,;providing further evidence of the unconventional nature of;superconductivity in the pseudogap regime. However, the absence, in the;strongly correlated but nonsuperconducting state, of discernibly;nonlinear response to an applied pairing field suggests that resonating;valence bond physics is not the origin of the kinetic-energy driven;superconductivity. DOI: 10.1103/PhysRevB.86.241106;Gull, Emanuel/A-2362-2010;Gull, Emanuel/0000-0002-6082-1260;10;1;0;0;10;1098-0121;WOS:000312365800001;;;J;Hiltscher, Bastian;Governale, Michele;Koenig, Juergen;ac Josephson transport through interacting quantum dots;PHYSICAL REVIEW B;86;23;235427;10.1103/PhysRevB.86.235427;DEC 17 2012;2012;We investigate the ac Josephson current through a quantum dot with;strong Coulomb interaction attached to two superconducting and one;normal lead. To this end, we perform a perturbation expansion in the;tunneling couplings within a diagrammatic real-time technique. The ac;Josephson current is connected to the reduced density matrix elements;that describe superconducting correlations induced on the quantum dot;via proximity effect. We analyze the dependence of the ac signal on the;level position of the quantum dot, the charging energy, and the applied;bias voltages. DOI: 10.1103/PhysRevB.86.235427;2;0;0;0;2;1098-0121;WOS:000312365200010;;;J;Kambe, Takashi;He, Xuexia;Takahashi, Yosuke;Yamanari, Yusuke;Teranishi, Kazuya;Mitamura, Hiroki;Shibasaki, Seiji;Tomita, Keitaro;Eguchi, Ritsuko;Goto, Hidenori;Takabayashi, Yasuhiro;Kato, Takashi;Fujiwara, Akihiko;Kariyado, Toshikaze;Aoki, Hideo;Kubozono, Yoshihiro;Synthesis and physical properties of metal-doped picene solids;PHYSICAL REVIEW B;86;21;214507;10.1103/PhysRevB.86.214507;DEC 17 2012;2012;We report electronic-structure and physical properties of metal-doped;picene as well as selective synthesis of the phase that exhibits 18-K;superconducting transition. First, Raman scattering is used to;characterize the number of electrons transferred from the dopants to;picene molecules, where a softening of Raman scattering peaks enables us;to determine the number of transferred electrons. From this, we have;identified that three electrons are transferred to each picene molecule;in the superconducting doped picene solids. Second, we report pressure;dependence of T-c in 7- and 18-K phases of K(3)picene. The 7-K phase;shows a negative pressure dependence, while the 18-K phase exhibits a;positive pressure dependence which can not be understood with a simple;phonon mechanism of BCS superconductivity. Third, we report a synthesis;method for superconducting K(3)picene by a solution process with;monomethylamine CH3NH2. This method enables us to prepare selectively;the K(3)picene sample exhibiting 18-K superconducting transition. The;method for preparing K(3)picene with T-c = 18 K found here may;facilitate clarification of the mechanism of superconductivity.;Takabayashi, Yasuhiro/A-5014-2013; EGUCHI, Ritsuko/H-4129-2011; Aoki, Hideo/A-2525-2009; KUBOZONO, Yoshihiro/B-2091-2011; KAMBE, Takashi/B-2117-2011;Takabayashi, Yasuhiro/0000-0002-3493-2194; Aoki,;Hideo/0000-0002-7332-9355;;14;0;0;0;14;1098-0121;WOS:000312364200006;;;J;Kandpal, Hem C.;Koepernik, Klaus;Richter, Manuel;Strong magnetic anisotropy of chemically bound Co dimers in a graphene;sheet;PHYSICAL REVIEW B;86;23;235430;10.1103/PhysRevB.86.235430;DEC 17 2012;2012;The magnetism of cobalt atoms and dimers bound by single vacancies in a;graphene sheet is investigated by means of relativistic density;functional calculations. In both cases, local magnetic moments are;formed despite strong chemical binding. While orbital magnetism is;suppressed in the Co atoms, magnetic bistability with an anisotropy;barrier of about 50 meV is possible in the chemically bound Co dimers.;The feasibility of their preparation is demonstrated and a general;construction principle for similar (sub-)nanometer size magnets is;proposed. DOI: 10.1103/PhysRevB.86.235430;3;0;0;0;3;1098-0121;WOS:000312365200013;;;J;Kawai, Shigeki;Glatzel, Thilo;Such, Bartosz;Koch, Sascha;Baratoff, Alexis;Meyer, Ernst;Energy dissipation in dynamic force microscopy on KBr(001) correlated;with atomic-scale adhesion phenomena;PHYSICAL REVIEW B;86;24;245419;10.1103/PhysRevB.86.245419;DEC 17 2012;2012;Atomic-scale adhesion phenomena between KBr tip and sample were studied;by dynamic force spectroscopy with a small amplitude of down to 285 pm;at room temperature. The high-resonance frequency of the second flexural;mode of a silicon cantilever (approximate to 1 MHz) suppresses an;apparent dissipation energy caused by undesirable mechanical couplings;in between the cantilever and the dither piezo actuator. Further, the;Joule heating dissipation contribution and the noise-equivalent;dissipation energy were reduced by setting a smaller amplitude. Usage of;a high resonance frequency and a smaller amplitude enables us to perform;highly sensitive measurements of the atomic-scale adhesion and the;tip-instability-related energy dissipation. Tip changes, caused by;tip-sample interactions and thermal energy, resulted in three different;dissipation energy levels (Delta E-ts approximate to 25 meV/cycle). This;infrequent change of the tip apex condition often prevents a stable;imaging with small amplitude. Our systematic measurement shows that the;atomic adhesion is caused mainly in the tip itself, and a sharper and;softer tip induced a larger energy dissipation. DOI:;10.1103/PhysRevB.86.245419;Glatzel, Thilo/F-2639-2011; Kawai, Shigeki/C-8517-2012;2;0;0;0;2;1098-0121;WOS:000312365800014;;;J;Kim, Younghyun;Cano, Jennifer;Nayak, Chetan;Majorana zero modes in semiconductor nanowires in contact with;higher-T-c superconductors;PHYSICAL REVIEW B;86;23;235429;10.1103/PhysRevB.86.235429;DEC 17 2012;2012;We analyze the prospects for stabilizing Majorana zero modes in;semiconductor nanowires that are proximity coupled to higher-temperature;superconductors. We begin with the case of iron pnictides which, though;they are s-wave superconductors, are believed to have superconducting;gaps that change sign. We then consider the case of cuprate;superconductors. We show that a nanowire on a steplike surface,;especially in an orthorhombic material such as YBCO, can support;Majorana zero modes at an elevated temperature. DOI:;10.1103/PhysRevB.86.235429;1;0;0;0;1;1098-0121;WOS:000312365200012;;;J;Kovylina, Miroslavna;Morales, Rafael;Labarta, Amilcar;Batlle, Xavier;Magnetization reversal in Ni/FeF2 heterostructures with the coexistence;of positive and negative exchange bias;PHYSICAL REVIEW B;86;22;224414;10.1103/PhysRevB.86.224414;DEC 17 2012;2012;Magnetization reversal mechanisms are studied in Ni/FeF2;heterostructures with the coexistence of positive and negative exchanged;bias (PEB/NEB), showing single and double hysteresis loops (DHL) in;magnetoresistance measurements. Micromagnetic simulations show that PEB;and NEB domains of a minimum critical size must be introduced in order;to reproduce the occurrence of DHLs. The simulations reveal that;different magnetic configurations and, hence, different magnetization;reversal processes take place in a ferromagnet (FM) on top of minority;PEB domains that are either greater or smaller than the critical size.;In particular, for the case of DHLs, core reversal of a depthwise domain;wall is observed over minority PEB domains when the magnetic field is;decreased from positive saturation. As the field is further decreased, a;complex domain-wall evolution takes place in the FM, including the;dependences of the domain-wall width and domain size on the magnetic;field and distance from the antiferromagnet (AF). These effects should;be taken into account when the domain size is estimated from data;measured by depth-dependent techniques since they average the;distribution of domain sizes in the FM for different distances from the;AF. DOI: 10.1103/PhysRevB.86.224414;Labarta, Amilcar/B-4539-2012; Batlle, Xavier/H-5795-2012;Labarta, Amilcar/0000-0003-0904-4678;;2;0;0;0;2;1098-0121;WOS:000312364700004;;;J;Kuga, Kentaro;Morrison, Gregory;Treadwell, LaRico;Chan, Julia Y.;Nakatsuji, Satoru;Magnetic order induced by Fe substitution of Al site in the;heavy-fermion systems alpha-YbAlB4 and beta-YbAlB4;PHYSICAL REVIEW B;86;22;224413;10.1103/PhysRevB.86.224413;DEC 17 2012;2012;beta-YbAlB4 is a heavy-fermion superconductor that exhibits a quantum;criticality without tuning at zero field and under ambient pressure. We;have succeeded in substituting Fe for Al in beta-YbAlB4 as well as the;polymorphous compound alpha-YbAlB4, which in contrast has a heavy;Fermi-liquid ground state. Full structure determination by;single-crystal x-ray diffraction confirmed no change in crystal;structure for both alpha- and beta-YbAlB4, in addition to volume;contraction with Fe substitution. Our measurements of the magnetization;and specific heat indicate that both alpha-YbAl0.93Fe0.07B4 and;beta-YbAl0.94Fe0.06B4 exhibit a magnetic order, most likely of a canted;antiferromagnetic type, at 7 similar to 9 K. The increase in the entropy;as well as the decrease in the antiferromagnetic Weiss temperature with;the Fe substitution in both systems indicates that the chemical pressure;due to the Fe substitution suppresses the Kondo temperature and induces;the magnetism. DOI: 10.1103/PhysRevB.86.224413;Chan, Julia/C-5392-2008;2;0;0;0;2;1098-0121;WOS:000312364700003;;;J;Lee, Yu-Wen;Lee, Yu-Li;Chung, Chung-Hou;Nonequilibrium noise correlations in a point contact of helical edge;states;PHYSICAL REVIEW B;86;23;235121;10.1103/PhysRevB.86.235121;DEC 17 2012;2012;We investigate theoretically the nonequilibrium finite-frequency current;noise in a four-terminal quantum point contact of interacting helical;edge states at a finite bias voltage. Special focus is put on the;effects of the single-particle and two-particle scattering between the;two helical edge states on the fractional charge quasiparticle;excitations shown in the nonequilibrium current noise spectra. Via the;Keldysh perturbative approach, we find that the effects of the;single-particle and the two-particle scattering processes on the current;noise depend sensitively on the Luttinger liquid parameter. Moreover,;the Fano factors for the auto-and cross correlations of the currents in;the terminals are distinct from the ones for tunneling between the;chiral edge states in the quantum Hall liquid. The current noise spectra;in the single-particle-scattering-dominated and the;two-particle-scattering-dominated regime are shown. Experimental;implications of our results on the transport through the helical edges;in two-dimensional topological insulators are discussed. DOI:;10.1103/PhysRevB.86.235121;6;0;0;0;6;1098-0121;WOS:000312365200001;;;J;Leppert, L.;Albuquerque, R. Q.;Kuemmel, S.;Gold-platinum alloys and Vegard's law on the nanoscale;PHYSICAL REVIEW B;86;24;241403;10.1103/PhysRevB.86.241403;DEC 17 2012;2012;The structure of gold-platinum nanoparticles is heavily debated as;theoretical calculations predict core-shell particles, whereas x-ray;diffraction experiments frequently detect randomly mixed alloys. By;calculating the structure of gold-platinum nanoparticles with diameters;of up to approximate to 3.5 nm and simulating their x-ray diffraction;patterns, we show that these seemingly opposing findings need not be in;contradiction: Shells of gold are hardly visible in usual x-ray;scattering, and the interpretation of Vegard's law is ambiguous on the;nanoscale. DOI: 10.1103/PhysRevB.86.241403;Albuquerque, Rodrigo/A-8433-2013; Kummel, Stephan/K-5634-2014;4;0;0;0;4;1098-0121;WOS:000312365800004;;;J;Lin, Chien-Hung;Sau, Jay D.;Das Sarma, S.;Zero-bias conductance peak in Majorana wires made of;semiconductor/superconductor hybrid structures;PHYSICAL REVIEW B;86;22;224511;10.1103/PhysRevB.86.224511;DEC 17 2012;2012;Motivated by a recent experimental report Mourik et al. [Science 336,;1003 (2012)] claiming the likely observation of the Majorana mode in a;semiconductor-superconductor hybrid structure, we study theoretically;the dependence of the zero-bias conductance peak associated with the;zero-energy Majorana mode in the topological superconducting phase as a;function of temperature, tunnel barrier potential, and a magnetic field;tilted from the direction of the wire for realistic wires of finite;lengths. We find that higher temperatures and tunnel barriers as well as;a large magnetic field in the direction transverse to the wire length;could very strongly suppress the zero- bias conductance peak as observed;in recent experiments. We also show that a strong magnetic field along;the wire could eventually lead to the splitting of the zero bias peak;into a doublet with the doublet energy splitting oscillating as a;function of increasing magnetic field. Our results based on the standard;theory of topological superconductivity in a semiconductor hybrid;structure in the presence of proximity-induced superconductivity,;spin-orbit coupling, and Zeeman splitting show that the recently;reported experimental data are generally consistent with the existing;theory that led to the predictions for the existence of the Majorana;modes in the semiconductor hybrid structures in spite of some apparent;anomalies in the experimental observations at first sight. We also make;a prediction for the future observation of Majorana splitting in finite;wires used in the experiments. DOI: 10.1103/PhysRevB. 86.224511;Das Sarma, Sankar/B-2400-2009;22;0;1;0;22;1098-0121;WOS:000312364700008;;;J;Marchal, R.;Boyko, O.;Bonello, B.;Zhao, J.;Belliard, L.;Oudich, M.;Pennec, Y.;Djafari-Rouhani, B.;Dynamics of confined cavity modes in a phononic crystal slab;investigated by in situ time-resolved experiments;PHYSICAL REVIEW B;86;22;224302;10.1103/PhysRevB.86.224302;DEC 17 2012;2012;The confinement of elastic waves within a single defect in a phononic;crystal slab is investigated both experimentally and theoretically. The;structure is formed by a honeycomb lattice of air holes in a silicon;plate with one hole missing in its center. The frequencies and;polarizations of the localized modes in the first band gap are computed;with a finite element method. A noncontact laser ultrasonic technique is;used both to excite flexural Lamb waves and to monitor in situ the;displacement field within the cavity. We report on the time evolution of;confinement, which is distinct according to the symmetry of the;eigenmode. DOI: 10.1103/PhysRevB.86.224302;3;0;0;0;3;1098-0121;WOS:000312364700002;;;J;Martinez, Enrique;Senninger, Oriane;Fu, Chu-Chun;Soisson, Frederic;Decomposition kinetics of Fe-Cr solid solutions during thermal aging;PHYSICAL REVIEW B;86;22;224109;10.1103/PhysRevB.86.224109;DEC 17 2012;2012;The decomposition of Fe-Cr solid solutions during thermal aging is;modeled by atomistic kinetic Monte Carlo simulations, using a rigid;lattice approximation with pair interactions that depend on the local;composition and temperature. The pair interactions are fitted on ab;initio calculations of mixing energies and vacancy migration barriers at;0 K. The entropic contributions to the mixing of Fe-Cr alloys and to the;vacancy formation and migration free energies are taken into account.;The model reproduces the change in sign of the mixing energy with the;alloy composition and gives realistic thermodynamic and kinetic;properties, including an asymmetrical miscibility gap at low temperature;and diffusion coefficients in good agreement with available experimental;data. Simulations of short-range ordering and alpha-alpha' decomposition;are performed at 773 and 813 K for Cr concentrations between 10% and;50%. They are compared with experimental kinetics based on;three-dimensional atom probe and neutron scattering measurements. The;possible effect of magnetic properties on diffusion in the alpha and;alpha' phases, and therefore on the decomposition kinetics, is;emphasized. DOI: 10.1103/PhysRevB.86.224109;soisson, frederic/B-2917-2009; Lujan Center, LANL/G-4896-2012;soisson, frederic/0000-0001-6435-6119;;6;0;0;0;6;1098-0121;WOS:000312364700001;;;J;Moon, Eun-Gook;Xu, Cenke;Exotic continuous quantum phase transition between Z(2) topological spin;liquid and Neel order;PHYSICAL REVIEW B;86;21;214414;10.1103/PhysRevB.86.214414;DEC 17 2012;2012;Recent numerical simulations with different techniques have all;suggested the existence of a continuous quantum phase transition between;the Z(2) topological spin-liquid phase and a conventional Neel order.;Motivated by this numerical progress, we propose a candidate theory for;such Z(2)-Neel transition. We first argue on general grounds that, for a;SU(2)-invariant system, this transition can not be interpreted as the;condensation of spinons in the Z(2) spin-liquid phase. Then, we propose;that such Z(2)-Neel transition is driven by proliferating the bound;state of the bosonic spinon and vison excitation of the Z(2) spin;liquid, i.e., the so-called (e, m)-type excitation. Universal critical;exponents associated with this exotic transition are computed using 1/N;expansion. This theory predicts that at the Z(2)-Neel transition, there;is an emergent quasi-long-range power-law correlation of columnar;valence bond solid order parameter.;6;0;0;0;6;1098-0121;WOS:000312364200003;;;J;Moskvin, A. S.;Gippius, A. A.;Tkachev, A. V.;Mahajan, A. V.;Chakrabarty, T.;Presniakov, I. A.;Sobolev, A. V.;Demazeau, G.;Direct evidence of non-Zhang-Rice Cu3+ centers in La2Li0.5Cu0.5O4;PHYSICAL REVIEW B;86;24;241107;10.1103/PhysRevB.86.241107;DEC 17 2012;2012;A well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+;center in hole-doped cuprates is a leading paradigm in modern theories;of high-temperature superconductivity. However, a dramatic temperature;evolution of the Li-6,Li-7 NMR signal in La2Li0.5Cu0.5O4, a system with;a regular lattice of well-isolated Cu3+ centers, reveals significant;magnetic fluctuations and suggests a quasidegeneracy to be a generic;property of their ground state at variance with the simple ZR model. We;argue for a competition of the ZR state with nearby states formed by a;"doped" hole occupying purely oxygen nonbonding a(2g)(pi) and e(u)(pi);orbitals rather than a conventional b(1g)(d(x2-y2))Cu 3d-O 2p hybrid.;The temperature variation of the Li-6,Li-7 NMR line shape and;spin-lattice relaxation rate point to a gradual slowing down of some;magnetic order parameter's fluctuations without distinct signatures of a;phase transition down to T = 2 K. This behavior agrees with a stripelike;ferrodistortive fluctuating Ammm order in a two-dimensional structure of;the (CuLi)O-2 planes accompanied by unconventional oxygen orbital;antiferromagnetic fluctuations. DOI: 10.1103/PhysRevB.86.241107;Gippius, Andrey/D-1139-2010; Sobolev, Alexey/C-3832-2009;Sobolev, Alexey/0000-0002-8085-5425;0;0;0;0;0;1098-0121;WOS:000312365800002;;;J;Nguyen, P. D.;Kepaptsoglou, D. M.;Erni, R.;Ramasse, Q. M.;Olsen, A.;Quantum confinement of volume plasmons and interband transitions in;germanium nanocrystals;PHYSICAL REVIEW B;86;24;245316;10.1103/PhysRevB.86.245316;DEC 17 2012;2012;The plasmonic properties of individual quantum-sized Ge nanocrystals;(NCs) were observed and systematically analyzed by aberration-corrected;scanning transmission electron microscopy (STEM) and electron energy;loss spectroscopy (EELS). For this purpose, Ge NCs embedded in an SiO2;matrix with controllable size, density, and structure were fabricated;using magnetron sputtering. The size dependence of the Ge plasmon;energies in the size range of 5-9 nm is shown to be well depicted by the;so-called medium quantum confinement (QC) model, with an effective mass;of 0.57m(0) (contrary to expectations of a stronger quantum effect). In;the very low-loss region of the EEL spectra, an apparent blue shift of;the E-2 interband transition peak up to 2 eV and a strong reduction in;the oscillator strength were measured for the NCs in the size range of;4-6 nm. It indicates for this smaller size range a transition to a QC;regime where the band structure and the density of states are modified;dramatically. These trends are explained by a combination of low-loss;and core-loss EELS results, which show that the Ge NCs are surrounded;uniformly by nearly stoichiometric SiO2. This local chemistry is shown;to provide an infinite potential barrier and to confine electrons and;holes in the spherically shaped Ge NCs. In addition to pure QC effects;in the Ge NCs, the SiO2 matrix thus plays an important role in the;strength of the observed QC and interband transitions. DOI:;10.1103/PhysRevB.86.245316;2;0;0;0;2;1098-0121;WOS:000312365800010;;;J;Roedl, Claudia;Bechstedt, Friedhelm;Optical and energy-loss spectra of the antiferromagnetic transition;metal oxides MnO, FeO, CoO, and NiO including quasiparticle and;excitonic effects;PHYSICAL REVIEW B;86;23;235122;10.1103/PhysRevB.86.235122;DEC 17 2012;2012;We calculate the frequency-dependent dielectric function for the series;of antiferromagnetic transition metal oxides (TMOs) from MnO to NiO;using many-body perturbation theory. Quasiparticle, excitonic, and;local-field effects are taken into account by solving the Bethe-Salpeter;equation in the framework of collinear spin polarization. The optical;spectra are based on electronic structures which have been obtained;using density-functional theory with a hybrid functional containing;screened exchange (HSE03) and a subsequent quasiparticle calculation in;the GW approximation to describe exchange and correlation effects;adequately. These sophisticated quasiparticle band structures are mapped;to electronic structures resulting from the computationally less;expensive GGA + U + Delta scheme that includes an on-site interaction U;and a scissors shift Delta and allows us to calculate the large number;of electronic states that is necessary to construct the Bethe-Salpeter;Hamiltonian. For an accurate description of the optical spectra, an;appropriate treatment of the strong electron-hole attraction is;mandatory to obtain agreement with the experimentally observed;absorption-peak positions. The itinerant s and p states as well as the;localized transition metal 3d states have to be considered on an equal;footing. We find that a purely atomic picture is not suitable to;understand the optical absorption spectra of the TMOs. Reflectivity;spectra, absorption coefficients, and loss functions at vanishing;momentum transfer are computed in a wide spectral range and discussed in;light of the available experimental data. DOI:;10.1103/PhysRevB.86.235122;8;1;0;0;8;1098-0121;WOS:000312365200002;;;J;Schlickeiser, F.;Atxitia, U.;Wienholdt, S.;Hinzke, D.;Chubykalo-Fesenko, O.;Nowak, U.;Temperature dependence of the frequencies and effective damping;parameters of ferrimagnetic resonance;PHYSICAL REVIEW B;86;21;214416;10.1103/PhysRevB.86.214416;DEC 17 2012;2012;Recent experiments on all-optical switching in GdFeCo and CoGd have;raised the question about the importance of the angular momentum or the;magnetization compensation point for ultrafast magnetization dynamics.;We investigate the dynamics of ferrimagnets by means of computer;simulations as well as analytically. The results from atomistic modeling;are explained by a theory based on the two-sublattice;Landau-Lifshitz-Bloch equation. Similarly to the experimental results;and unlike predictions based on the macroscopic Landau-Lifshitz;equation, we find an increase in the effective damping at temperatures;approaching the Curie temperature. Further results for the temperature;dependence of the frequencies and effective damping parameters of the;normal modes represent an improvement of former approximated solutions,;building a better basis for comparison to recent experiments.;Atxitia, Unai/A-8870-2010;4;0;0;0;4;1098-0121;WOS:000312364200005;;;J;Smith, R. F.;Minich, R. W.;Rudd, R. E.;Eggert, J. H.;Bolme, C. A.;Brygoo, S. L.;Jones, A. M.;Collins, G. W.;Orientation and rate dependence in high strain-rate compression of;single-crystal silicon;PHYSICAL REVIEW B;86;24;245204;10.1103/PhysRevB.86.245204;DEC 17 2012;2012;High strain-rate ((epsilon)over dot similar to 10(6)-10(9) s(-1));compression of single crystal Si reveals strong orientation- and;rate-dependent precursor stresses. At these high compression rates, the;peak elastic stress, sigma(E_Peak), for Si [100], [110], and [111];exceeds twice the Hugoniot elastic limit. Near the loading surface, the;rate at which Si evolves from uniaxial compression to a;three-dimensional relaxed state is exponentially dependent on;sigma(E_Peak) and independent of initial crystal orientation. At later;times, the high elastic wave speed results in a temporal decoupling of;the elastic precursor from the main inelastic wave. A rapid;high-(epsilon)over dot increase in the measured elastic stress at the;onset of inelastic deformation is consistent with a transition from;dislocation flow mediated by thermal activation to a phonon drag regime.;DOI: 10.1103/PhysRevB.86.245204;3;0;0;0;3;1098-0121;WOS:000312365800006;;;J;Svensson, S. P.;Sarney, W. L.;Hier, H.;Lin, Y.;Wang, D.;Donetsky, D.;Shterengas, L.;Kipshidze, G.;Belenky, G.;Band gap of InAs1-xSbx with native lattice constant;PHYSICAL REVIEW B;86;24;245205;10.1103/PhysRevB.86.245205;DEC 17 2012;2012;The band gap energy of the alloy InAsSb has been studied as a function;of composition with special emphasis on minimization of strain-induced;artifacts. The films were grown by molecular beam epitaxy on GaSb;substrates with compositionally graded buffer layers that were designed;to produce strain-free films. The compositions were precisely determined;by high-resolution x-ray diffraction. Evidence for weak, long-range,;group-V ordering was detected in materials exhibiting residual strain;and relaxation. In contrast, unstrained films having the nondistorted;cubic form showed no evidence of group-V ordering. The photoluminescence;(PL) peak positions therefore corresponds to the inherent band gap of;unstrained, unrelaxed, InAsSb. PL peaks were recorded for compositions;up to 46% Sb, reaching a peak wavelength of 10.3 mu m, observed under;low excitation at T = 13 K. The alloy band gap energies determined from;PL maxima are described with a bowing parameter of 0.87 eV, which is;significantly larger than measured for InAsSb in earlier work. The;sufficiently large bowing parameter and the ability to grow the alloys;without ordering allows direct band gap InAsSb to be a candidate;material for low-temperature long-wavelength infrared detector;applications. DOI: 10.1103/PhysRevB.86.245205;8;0;0;0;8;1098-0121;WOS:000312365800007;;;J;Thirupathaiah, S.;Evtushinsky, D. V.;Maletz, J.;Zabolotnyy, V. B.;Kordyuk, A. A.;Kim, T. K.;Wurmehl, S.;Roslova, M.;Morozov, I.;Buechner, B.;Borisenko, S. V.;Weak-coupling superconductivity in electron-doped NaFe0.95Co0.05As;revealed by ARPES;PHYSICAL REVIEW B;86;21;214508;10.1103/PhysRevB.86.214508;DEC 17 2012;2012;We report a systematic study on the electronic structure and;superconducting (SC) gaps in electron-doped NaFe0.95Co0.05As;superconductor using angle-resolved photoemission spectroscopy. Holelike;Fermi sheets are at the zone center and electronlike Fermi sheets are at;the zone corner, and are mainly contributed by xz and yz orbital;characters. Our results reveal a Delta/KBTc in the range of 1.8-2.1,;suggesting a weak-coupling superconductivity in these compounds. Gap;closing above the transition temperature (T-c) shows the absence of;pseudogaps. Gap evolution with temperature follows the BCS gap equation;near the Gamma, Z, and M high symmetry points. Furthermore, an almost;isotropic superconductivity along the k(z) direction in the momentum;space is observed by varying the excitation energies.;Wurmehl, Sabine/A-5872-2009; Morozov, Igor/C-4329-2011; Borisenko, Sergey/G-6743-2012; Roslova, Maria/F-7352-2013;Borisenko, Sergey/0000-0002-5046-4829;;6;0;0;0;6;1098-0121;WOS:000312364200007;;;J;Tsuda, Kenji;Sano, Rikiya;Tanaka, Michiyoshi;Nanoscale local structures of rhombohedral symmetry in the orthorhombic;and tetragonal phases of BaTiO3 studied by convergent-beam electron;diffraction;PHYSICAL REVIEW B;86;21;214106;10.1103/PhysRevB.86.214106;DEC 17 2012;2012;The symmetries of the rhombohedral, orthorhombic, and tetragonal phases;of barium titanate (BaTiO3) are investigated using convergent-beam;electron diffraction. Nanometer-sized local structures with rhombohedral;symmetry are observed in both the orthorhombic and tetragonal phases.;This indicates that an order-disorder character exists in phase;transformations of BaTiO3. The nanostructures in these phases are;discussed in terms of an order-disorder model with off-centered Ti in;the < 111 > directions.;6;0;0;0;6;1098-0121;WOS:000312364200001;;;J;Ulstrup, Soren;Frederiksen, Thomas;Brandbyge, Mads;Nonequilibrium electron-vibration coupling and conductance fluctuations;in a C-60 junction;PHYSICAL REVIEW B;86;24;245417;10.1103/PhysRevB.86.245417;DEC 17 2012;2012;We investigate chemical bond formation and conductance in a molecular;C-60 junction under finite bias voltage using first-principles;calculations based on density functional theory and nonequilibrium;Green's functions (DFT-NEGF). At the point of contact formation we;identify a remarkably strong coupling between the C-60 motion and the;molecular electronic structure. This is only seen for positive sample;bias, although the conductance itself is not strongly polarity;dependent. The nonequilibrium effect is traced back to a sudden shift in;the position of the voltage drop with a small C-60 displacement.;Combined with a vibrational heating mechanism we construct a model from;our results that explain the polarity-dependent two-level conductance;fluctuations observed in recent scanning tunneling microscopy (STM);experiments [N. Neel et al., Nano Lett. 11, 3593 (2011)]. These findings;highlight the significance of nonequilibrium effects in chemical bond;formation/breaking and in electron-vibration coupling in molecular;electronics. DOI: 10.1103/PhysRevB.86.245417;Frederiksen, Thomas/D-3545-2011; Brandbyge, Mads/C-6095-2008; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;Frederiksen, Thomas/0000-0001-7523-7641;;4;0;0;0;4;1098-0121;WOS:000312365800012;;;J;Urdaniz, M. C.;Barral, M. A.;Llois, A. M.;Magnetic exchange coupling in 3d-transition-metal atomic chains adsorbed;on Cu2N/Cu(001);PHYSICAL REVIEW B;86;24;245416;10.1103/PhysRevB.86.245416;DEC 17 2012;2012;Covalent substrates can give rise to a variety of magnetic interaction;mechanisms among adsorbed transition-metal atoms building atomic;nanostructures. We show this by calculating the ground state magnetic;configuration of monoatomic 3d chains deposited on a monolayer of Cu2N;grown on Cu(001) as a function of d filling and of adsorption sites of;these nanostructures. DOI: 10.1103/PhysRevB.86.245416;1;0;0;0;1;1098-0121;WOS:000312365800011;;;J;Vaz, Eduardo;Kyriakidis, Jordan;Resonant regimes in the Fock-space coherence of multilevel quantum dots;PHYSICAL REVIEW B;86;23;235310;10.1103/PhysRevB.86.235310;DEC 17 2012;2012;The coherence between quantum states with different particle numbers-the;Fock-space coherence-qualitatively differs from the more common;Hilbert-space coherence between states with equal particle numbers. For;a quantum dot with multiple channels available for transport, we find;the conditions for decoupling the dynamics of the Fock-space coherence;from both the Hilbert-space coherence as well as the population;dynamics. We further find specific energy and coupling regimes where a;long-lived resonance in the Fock-space coherence of the system is;realized, even where no resonances are found either in the populations;or Hilbert-space coherence. Numerical calculations show this resonance;remains robust in the presence of both boson-mediated relaxation and;transport through the quantum dot. DOI: 10.1103/PhysRevB.86.235310;1;0;0;0;1;1098-0121;WOS:000312365200009;;;J;Ward, D. K.;Zhou, X. W.;Wong, B. M.;Doty, F. P.;Zimmerman, J. A.;Analytical bond-order potential for the Cd-Zn-Te ternary system;PHYSICAL REVIEW B;86;24;245203;10.1103/PhysRevB.86.245203;DEC 17 2012;2012;Cd-Zn-Te ternary alloyed semiconductor compounds are key materials in;radiation detection and photovoltaic applications. Currently,;crystalline defects such as dislocations limit the performance of these;materials. Atomistic simulations are a powerful method for exploring;crystalline defects at a resolution unattainable by experimental;techniques. To enable accurate atomistic simulations of defects in the;Cd-Zn-Te systems, we develop a full Cd-Zn-Te ternary bond-order;potential. This Cd-Zn-Te potential has numerous unique advantages over;other potential formulations: (1) It is analytically derived from;quantum mechanical theories and is therefore more likely to be;transferable to environments that are not explicitly tested. (2) A;variety of elemental and compound configurations (with coordination;varying from 1 to 12) including small clusters, bulk lattices, defects,;and surfaces are explicitly considered during parameterization. As a;result, the potential captures structural and property trends close to;those seen in experiments and quantum mechanical calculations and;provides a good description of melting temperature, defect;characteristics, and surface reconstructions. (3) Most importantly, this;potential is validated to correctly predict the crystalline growth of;the ground-state structures for Cd, Zn, Te elements as well as CdTe,;ZnTe, and Cd1-xZnxTe compounds during highly challenging molecular;dynamics vapor deposition simulations. DOI: 10.1103/PhysRevB.86.245203;Wong, Bryan/B-1663-2009;Wong, Bryan/0000-0002-3477-8043;7;0;0;0;7;1098-0121;WOS:000312365800005;;;J;Williams, M. E.;Sims, H.;Mazumdar, D.;Butler, W. H.;Effects of 3d and 4d transition metal substitutional impurities on the;electronic properties of CrO2;PHYSICAL REVIEW B;86;23;235124;10.1103/PhysRevB.86.235124;DEC 17 2012;2012;We present first-principles-based density functional theory calculations;of the electronic and magnetic structure of CrO2 with 3d and 4d;substitutional impurities. We find that the half-metallicity of CrO2;remains intact for the ground state of all of the calculated;substitutions. We also observe two periodic trends as a function of the;number of valence electrons: if the substituted atom has six or fewer;valence electrons, the number of down spin electrons associated with the;impurity ion is zero, resulting in ferromagnetic alignment of the;impurity magnetic moment with the magnetization of the CrO2 host. For;substituent atoms with eight to ten valence electrons (with the;exception of Ni), the number of down-spin electrons contributed by the;impurity ion remains fixed at three as the number contributed to the;majority increases from one to three resulting in antiferromagnetic;alignment between impurity moment and host magnetization. In impurities;with seven valence electrons, the zero down-spin and threse down-spin;configurations are very close in energy. At 11 valence electrons, the;energy is minimized when the substituent ion contributes five down-spin;electrons. The moments on the 4d impurities, particularly Nb and Mo,;tend to be delocalized compared with those of the 3ds. DOI:;10.1103/PhysRevB.86.235124;0;0;0;0;0;1098-0121;WOS:000312365200004;;;J;Yan, Xin-Zhong;Ting, C. S.;Possible broken inversion and time-reversal symmetry state of electrons;in bilayer graphene;PHYSICAL REVIEW B;86;23;235126;10.1103/PhysRevB.86.235126;DEC 17 2012;2012;With the two-band continuum model, we study the broken inversion and;time-reversal symmetry state of electrons with finite-range repulsive;interactions in bilayer graphene. In the state, there are overlapped;loop currents in each layer. With the analytical solution to the;mean-field Hamiltonian, we obtain the electronic spectra. The ground;state is gapped. In the presence of the magnetic field B, the energy gap;grows with increasing B, in excellent agreement with the experimental;observation. Such an energy-gap behavior originates from the;disappearance of a Landau level of n = 0 and 1 states. The present;result resolves explicitly the puzzle of the gap dependence of B. DOI:;10.1103/PhysRevB.86.235126;6;0;0;0;6;1098-0121;WOS:000312365200006;;;J;Yin, Z. P.;Haule, K.;Kotliar, G.;Fractional power-law behavior and its origin in iron-chalcogenide and;ruthenate superconductors: Insights from first-principles calculations;(vol 86, 195141, 2012);PHYSICAL REVIEW B;86;23;239904;10.1103/PhysRevB.86.239904;DEC 17 2012;2012;2;0;0;0;2;1098-0121;WOS:000312365200014;;;J;Zhigadlo, N. D.;Weyeneth, S.;Katrych, S.;Moll, P. J. W.;Rogacki, K.;Bosma, S.;Puzniak, R.;Karpinski, J.;Batlogg, B.;High-pressure flux growth, structural, and superconducting properties of;LnFeAsO (Ln = Pr, Nd, Sm) single crystals;PHYSICAL REVIEW B;86;21;214509;10.1103/PhysRevB.86.214509;DEC 17 2012;2012;Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with;lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high;pressure. The crystals are of good structural quality and become;superconducting when O is partially substituted by F (PrFeAsO1-xFx and;NdFeAsO1-xFx) or when Fe is substituted by Co (SmFe1-xCoxAsO). From;magnetization measurements, we estimate the temperature dependence and;anisotropy of the upper critical field and the critical current density;of underdoped PrFeAsO0.7F0.3 crystal with T-c approximate to 25 K.;Single crystals of SmFe1-xCoxAsO with maximal T-c up to 16.3 K for x;approximate to 0.08 were grown. From transport and magnetic;measurements, we estimate the critical fields and their anisotropy and;find these superconducting properties to be quite comparable to the ones;in SmFeAsO1-xFx with a much higher T-c approximate to 50 K. The;magnetically measured critical current densities are as high as 10(9);A/m(2) at 2 K up to 7 T, with indication of the usual fishtail effect.;The upper critical field estimated from resistivity measurements is;anisotropic with slopes of similar to - 8.7 T/K (H parallel to ab plane);and similar to - 1.7 T/K (H parallel to c axis). This anisotropy;(similar to 5) is similar to that in other Ln1111 crystals with various;higher T-c's.;Puzniak, Roman/N-1643-2013;Puzniak, Roman/0000-0001-5636-5541;7;0;0;0;7;1098-0121;WOS:000312364200008;;;J;Zhu, Guobao;Yang, Shengyuan A.;Fang, Cheng;Liu, W. M.;Yao, Yugui;Theory of orbital magnetization in disordered systems;PHYSICAL REVIEW B;86;21;214415;10.1103/PhysRevB.86.214415;DEC 17 2012;2012;We present a general formula of the orbital magnetization of disordered;systems based on the Keldysh Green's function theory in the;gauge-covariant Wigner space. In our approach, the gauge invariance of;physical quantities is ensured from the very beginning, and the vertex;corrections are easily included. Our formula applies not only for;insulators but also for metallic systems where the quasiparticle;behavior is usually strongly modified by the disorder scattering. In the;absence of disorders, our formula recovers the previous results obtained;from the semiclassical theory and the perturbation theory. As an;application, we calculate the orbital magnetization of a weakly;disordered two-dimensional electron gas with Rashba spin-orbit coupling.;We find that for the short-range disorder scattering, its major effect;is to the shifting of the distribution of orbital magnetization;corresponding to the quasiparticle energy renormalization.;Yao, Yugui/A-8411-2012; Yang, Shengyuan/L-2848-2014;6;0;1;0;7;1098-0121;WOS:000312364200004;;;J;Zhukov, E. A.;Yugov, O. A.;Yugova, I. A.;Yakovlev, D. R.;Karczewski, G.;Wojtowicz, T.;Kossut, J.;Bayer, M.;Resonant spin amplification of resident electrons in CdTe/(Cd,Mg)Te;quantum wells subject to tilted magnetic fields;PHYSICAL REVIEW B;86;24;245314;10.1103/PhysRevB.86.245314;DEC 17 2012;2012;Electron spin coherence in CdTe/(Cd,Mg)Te quantum wells is studied;experimentally and theoretically in tilted external magnetic fields;generated by a superconducting vector magnet. The long-lived spin;coherence is measured by pump-probe Kerr rotation in the resonant spin;amplification (RSA) regime. The shape of RSA signals is very sensitive;to weak magnetic field components deviating from the Voigt or Faraday;geometries. DOI: 10.1103/PhysRevB.86.245314;Yugova, Irina/F-6823-2011;Yugova, Irina/0000-0003-0020-3679;3;0;0;0;3;1098-0121;WOS:000312365800008;;;J;Adelstein, Nicole;Mun, B. Simon;Ray, Hannah L.;Ross, Philip N., Jr.;Neaton, Jeffrey B.;De Jonghe, Lutgard C.;Structure and electronic properties of cerium orthophosphate: Theory and;experiment (vol 83, 205104, 2011);PHYSICAL REVIEW B;86;23;239903;10.1103/PhysRevB.86.239903;DEC 14 2012;2012;Mun, Bongjin /G-1701-2013;0;0;0;0;0;1098-0121;WOS:000312365100009;;;J;Bagchi, Debarshee;Mohanty, P. K.;Thermally driven classical Heisenberg model in one dimension;PHYSICAL REVIEW B;86;21;214302;10.1103/PhysRevB.86.214302;DEC 14 2012;2012;We study thermal transport in a classical one-dimensional Heisenberg;model employing a discrete-time odd-even precessional update scheme.;This dynamics equilibrates a spin chain for any arbitrary temperature;and finite value of the integration time step Delta t. We rigorously;show that in presence of driving, the system attains local thermal;equilibrium, which is a strict requirement of Fourier law. In the;thermodynamic limit, heat current for such a system obeys Fourier law;for all temperatures, as has been recently shown [A. V. Savin, G. P.;Tsironis, and X. Zotos, Phys. Rev. B 72, 140402(R) (2005)]. Finite;systems, however, show an apparent ballistic transport which crosses;over to a diffusive one as the system size is increased. We provide;exact results for current and energy profiles in zero- and;infinite-temperature limits. DOI: 10.1103/PhysRevB.86.214302;3;0;0;0;3;1098-0121;WOS:000312364100001;;;J;Barasinski, A.;Kamieniarz, G.;Drzewinski, A.;Magnetization-based assessment of correlation energy in canted;single-chain magnets;PHYSICAL REVIEW B;86;21;214412;10.1103/PhysRevB.86.214412;DEC 14 2012;2012;We demonstrate numerically that for the strongly anisotropic;homometallic S = 2 canted single-chain magnet described by the quantum;antiferromagnetic Heisenberg model, the correlation energy and exchange;coupling constant can be directly estimated from the;in-field-magnetization profile found along the properly selected;crystallographic direction. In the parameter space defined by the;spherical angles (phi, theta) determining the axes orientation, four;regions are identified with different sequences of the characteristic;field-dependent magnetization profiles representing the;antiferromagnetic, metamagnetic, and weak ferromagnetic type behavior.;These sequences provide a criterion for the applicability of the;anisotropic quantum Heisenberg model to a given experimental system. Our;analysis shows that the correlation energy decreases linearly with field;and vanishes for a given value H-cr, which defines a special coordinates;in the metamagnetic profile relevant for the zero-field correlation;energy and magnetic coupling. For the single-chain magnet formed by the;strongly anisotropic manganese(III) acetate meso-tetraphenylporphyrin;complexes coupled to the phenylphosphinate ligands, the experimental;metamagnetic-type magnetization curve in the c direction yields an;accurate estimate of the values of correlation energy Delta(xi)/k(B) =;7.93 K and exchange coupling J/k(B) = 1.20 K. DOI:;10.1103/PhysRevB.86.214412;1;0;0;0;1;1098-0121;WOS:000312364100004;;;J;Brinzari, T. V.;Chen, P.;Tung, L. -C.;Kim, Y.;Smirnov, D.;Singleton, J.;Miller, Joel. S.;Musfeldt, J. L.;Magnetoelastic coupling in [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] molecule-based;magnet;PHYSICAL REVIEW B;86;21;214411;10.1103/PhysRevB.86.214411;DEC 14 2012;2012;Infrared and Raman vibrational spectroscopies were employed to explore;the lattice dynamics of [Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] through the;field- and temperature-driven magnetic transitions. The high field work;reveals systematic changes in the C equivalent to N stretching mode and;Cr-containing phonons as the system is driven away from the;antiferromagnetic state. The magnetic intersublattice coalescence;transition at B-c similar or equal to 0.08 T, on the contrary, is purely;magnetic and takes place with no lattice involvement. The variable;temperature spectroscopy affirms overall [Cr(CN)(6)](3-) flexibility;along with stronger intermolecular interactions at low temperature.;Based on a displacement pattern analysis, we discuss the local lattice;distortions in terms of an adaptable chromium environment. These;findings provide deeper understanding of spin-lattice coupling in;[Ru-2(O2CMe)(4)](3)[Cr(CN)(6)] and may be useful in the development of;technologically important molecule-based magnets. DOI:;10.1103/PhysRevB.86.214411;4;2;0;0;4;1098-0121;WOS:000312364100003;;;J;Chan, Tzu-Liang;Capacitance of metallic and semiconducting nanowires examined by;first-principles calculations;PHYSICAL REVIEW B;86;24;245414;10.1103/PhysRevB.86.245414;DEC 14 2012;2012;The capacitance of Al < 110 > and P-doped Si < 110 > nanowires a few;nanometers in diameter are examined by first-principles calculations.;During charging, the metallic nanowire expels the charge to its surface,;and its capacitance stays relatively constant. For the semiconducting;nanowire, depletion of conduction electrons can lead to an increase in;the work function, which results in a drop in the capacitance when;charged beyond a threshold. This study is made possible by developing a;formalism for total energy calculations of charged periodic systems with;a specific electrostatic boundary condition. DOI:;10.1103/PhysRevB.86.245414;1;0;0;0;1;1098-0121;WOS:000312365400006;;;J;Dias, R. G.;del Rio, Lidia;Goltsev, A. V.;Interplay between potential and spin-flip scattering in systems with;depleted density of states;PHYSICAL REVIEW B;86;23;235120;10.1103/PhysRevB.86.235120;DEC 14 2012;2012;We study the behavior of a magnetic impurity in systems with a depleted;density of states by use of the spin-1/2 single-impurity Anderson model;and the equation of motion approach. We calculate the impurity spectral;function and study the role of potential and spin-flip scattering. We;show that in these systems, if the hybridization is larger than a;critical value, a narrow virtual bound resonance emerges. The resonance;peak appears much below the Fermi energy and is dominated by the;contribution of potential scattering of conduction electrons by the;magnetic impurity while spin-flip scattering only gives a nonsingular;temperature-dependent contribution to this peak. These results are in;contrast to behavior of impurities in normal metals where it is;spin-flip scattering that is responsible for the Kondo peak near the;Fermi level while potential scattering gives a nonsignificant;renormalization of the exchange coupling. We also show that the virtual;bound resonance leads to a strong renormalization of the effective;exchange coupling between conduction and impurity spins. The narrow;virtual bound resonance can be observed in graphene with magnetic;impurities where its spectral weight and position is strongly influenced;by the van Hove singularity. DOI: 10.1103/PhysRevB.86.235120;Universidade Aveiro, Departamento Fisica/E-4128-2013; Dias, Ricardo/J-6007-2013;Dias, Ricardo/0000-0002-5128-5531;0;0;0;0;0;1098-0121;WOS:000312365100001;;;J;Ganeshan, Sriram;Abanov, Alexander G.;Averin, Dmitri V.;Fractional quantum Hall interferometers in a strong tunneling regime:;The role of compactness in edge fields;PHYSICAL REVIEW B;86;23;235309;10.1103/PhysRevB.86.235309;DEC 14 2012;2012;We consider multiple-point tunneling in the interferometers formed;between edges of electron liquids with, in general, different filling;factors in the regime of the fractional quantum Hall effect (FQHE). We;derive an effective matrix Caldeira-Leggett model for the multiple;tunneling contacts connecting the chiral single-mode FQHE edges. It is;shown that the compactness of the Wen-Frohlich chiral boson fields;describing the FQHE edge modes plays a crucial role in eliminating the;spurious nonlocality of the electron transport properties of the FQHE;interferometers arising in the regime of strong tunneling. DOI:;10.1103/PhysRevB.86.235309;0;0;0;0;0;1098-0121;WOS:000312365100004;;;J;Giannazzo, F.;Deretzis, I.;La Magna, A.;Roccaforte, F.;Yakimova, R.;Electronic transport at monolayer-bilayer junctions in epitaxial;graphene on SiC;PHYSICAL REVIEW B;86;23;235422;10.1103/PhysRevB.86.235422;DEC 14 2012;2012;Two-dimensional maps of the electronic conductance in epitaxial graphene;grown on SiC were obtained by calibrated conductive atomic force;microscopy. The correlation between morphological and electrical maps;revealed the local conductance degradation in epitaxial graphene over;the SiC substrate steps or at the junction between monolayer (1L) and;bilayer (2L) graphene regions. The effect of steps strongly depends on;the charge transfer phenomena between the step sidewall and graphene,;whereas the resistance increase at the 1L/2L junction is a purely;quantum-mechanical effect independent on the interaction with the;substrate. First-principles transport calculations indicate that the;weak wave-function coupling between the 1L pi/pi* bands with the;respective first bands of the 2L region gives rise to a strong;suppression of the conductance for energies within +/- 0.48 eV from the;Dirac point. Conductance degradation at 1L/2L junctions is therefore a;general issue for large area graphene with a certain fraction of;inhomogeneities in the layer number, including graphene grown by;chemical vapor deposition on metals. DOI: 10.1103/PhysRevB.86.235422;Materials, Semiconductor/I-6323-2013;11;0;0;0;11;1098-0121;WOS:000312365100005;;;J;Hintzsche, L. E.;Fang, C. M.;Watts, T.;Marsman, M.;Jordan, G.;Lamers, M. W. P. E.;Weeber, A. W.;Kresse, G.;Density functional theory study of the structural and electronic;properties of amorphous silicon nitrides: Si3N4-x:H;PHYSICAL REVIEW B;86;23;235204;10.1103/PhysRevB.86.235204;DEC 14 2012;2012;We present ab initio density functional theory studies for;stoichiometric as well as nonstoichiometric amorphous silicon nitride,;varying the stoichiometry between Si3N4.5 and Si3N3. Stoichiometric;amorphous Si3N4 possesses the same local structure as crystalline Si3N4,;with Si being fourfold coordinated and N being threefold coordinated.;Only few Si-Si and N-N bonds and other defects are found in;stoichiometric silicon nitride, and the electronic properties are very;similar to the crystalline bulk. In over-stoichiometric Si3N4+x, the;additional N results in N-N bonds, whereas in under-stoichiometric;Si3N4-x the number of homopolar Si-Si bonds increases with decreasing N;content. Analysis of the structure factor and the local coordination of;the Si atoms indicates a slight tendency towards Si clustering, although;at the investigated stoichiometries, phase separation is not observed.;In the electronic properties, the conduction-band minimum is dominated;by Si states, whereas the valence-band maximum is made up by lone pair N;states. Towards Si rich samples, the character of the valence-band;maximum becomes dominated by Si states corresponding to Si-Si bonding;linear combinations. Adding small amounts of hydrogen, as typically used;in passivating layers of photovoltaic devices, has essentially no impact;on the overall structural and electronic properties. DOI:;10.1103/PhysRevB.86.235204;Fang, Chang Ming/E-9213-2013;3;0;0;0;3;1098-0121;WOS:000312365100002;;;J;Joung, Daeha;Khondaker, Saiful I.;Efros-Shklovskii variable-range hopping in reduced graphene oxide sheets;of varying carbon sp(2) fraction;PHYSICAL REVIEW B;86;23;235423;10.1103/PhysRevB.86.235423;DEC 14 2012;2012;We investigate the low-temperature electron transport properties of;chemically reduced graphene oxide (RGO) sheets with different carbon;sp(2) fractions of 55% to 80%. We show that in the low-bias (Ohmic);regime, the temperature (T) dependent resistance (R) of all the devices;follow Efros-Shklovskii variable range hopping (ES-VRH) R similar to;exp[(T-ES/T)(1/2)] with T-ES decreasing from 3.1 x 10(4) to 0.42 x 10(4);K and electron localization length increasing from 0.46 to 3.21 nm with;increasing sp(2) fraction. From our data, we predict that for the;temperature range used in our study, Mott-VRH may not be observed even;at 100% sp(2) fraction samples due to residual topological defects and;structural disorders. From the localization length, we calculate a;band-gap variation of our RGO from 1.43 to 0.21 eV with increasing sp(2);fraction from 55 to 80%, which agrees remarkably well with theoretical;predictions. We also show that, in the high bias non-Ohmic regime at low;temperature, the hopping is field driven and the data follow R similar;to exp[(E0/E)(1/2)] providing further evidence of ES-VRH. DOI:;10.1103/PhysRevB.86.235423;14;0;0;0;14;1098-0121;WOS:000312365100006;;;J;Kim, Se-Heon;Homyk, Andrew;Walavalkar, Sameer;Scherer, Axel;High-Q impurity photon states bounded by a photonic band pseudogap in an;optically thick photonic crystal slab;PHYSICAL REVIEW B;86;24;245114;10.1103/PhysRevB.86.245114;DEC 14 2012;2012;We show that, taking a two-dimensional photonic crystal slab system as;an example, surprisingly high quality factors (Q) over 10(5) are;achievable, even in the absence of a rigorous photonic band gap. We find;that the density of in-plane Bloch modes can be controlled by creating;additional photon feedback from a finite-size photonic-crystal boundary;that serves as a low-Q resonator. This mechanism enables significant;reduction in the coupling strength between the bound state and the;extended Bloch modes by more than a factor of 40. DOI:;10.1103/PhysRevB.86.245114;Walavalkar, Sameer/B-3196-2013; Kim, Se-Heon/C-5498-2008;Walavalkar, Sameer/0000-0002-7628-9600;;2;0;0;0;2;1098-0121;WOS:000312365400001;;;J;Kravets, A. F.;Timoshevskii, A. N.;Yanchitsky, B. Z.;Bergmann, M. A.;Buhler, J.;Andersson, S.;Korenivski, V.;Temperature-controlled interlayer exchange coupling in strong/weak;ferromagnetic multilayers: A thermomagnetic Curie switch;PHYSICAL REVIEW B;86;21;214413;10.1103/PhysRevB.86.214413;DEC 14 2012;2012;We investigate interlayer exchange coupling based on driving a;strong/weak/strong ferromagnetic trilayer through the Curie point of the;weakly ferromagnetic spacer, with exchange coupling between the strongly;ferromagnetic outer layers that can be switched on and off, or varied;continuously in magnitude by controlling the temperature of the;material. We use Ni-Cu alloys of varied composition as the spacer;material and model the effects of proximity-induced magnetism and the;interlayer exchange coupling through the spacer from first principles,;taking into account not only thermal spin disorder but also the;dependence of the atomic moment of Ni on the nearest-neighbor;concentration of the nonmagnetic Cu. We propose and demonstrate a;gradient-composition spacer, with a lower Ni concentration at the;interfaces, for greatly improved effective-exchange uniformity and;significantly improved thermomagnetic switching in the structure. The;reported multilayer materials can form the base for a variety of;magnetic devices, such as sensors, oscillators, and memory elements;based on thermomagnetic Curie switching. DOI: 10.1103/PhysRevB.86.214413;Korenivski, Vladislav/N-7355-2014;Korenivski, Vladislav/0000-0003-2339-1692;4;0;0;0;4;1098-0121;WOS:000312364100005;;;J;Little, C. E.;Anufriev, R.;Iorsh, I.;Kaliteevski, M. A.;Abram, R. A.;Brand, S.;Tamm plasmon polaritons in multilayered cylindrical structures;PHYSICAL REVIEW B;86;23;235425;10.1103/PhysRevB.86.235425;DEC 14 2012;2012;It is shown that cylindrical Bragg reflector structures with either a;metal core, a metal cladding, or both can support Tamm plasmon;polaritons (TPPs) that can propagate axially along the interface between;the metallic layer and the adjacent dielectric. A transfer matrix;formalism for cylindrical multilayered structures is used in association;with cavity phase matching considerations to design structures that;support Tamm plasmon polaritons at specified frequencies, and to explore;the field distributions and the dispersion relations of the excitations.;The cylindrical TPPs can exist in both the TE and TM polarizations for;the special cases of modes with either azimuthal isotropy or zero axial;propagation constant and also as hybrid cylindrical modes when neither;of those conditions applies. In the cases considered the TPPs have low;effective masses and low group velocities. Also, when there is both;metallic core and cladding, near degenerate modes localized at each;metallic interface can couple to produce symmetric and antisymmetric;combinations whose frequency difference is in the terahertz regime. DOI:;10.1103/PhysRevB.86.235425;Brand, Stuart/A-1658-2009;Brand, Stuart/0000-0002-1757-5017;3;0;0;0;3;1098-0121;WOS:000312365100008;;;J;Machida, Manabu;Iitaka, Toshiaki;Miyashita, Seiji;ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale;molecular magnet V-15;PHYSICAL REVIEW B;86;22;224412;10.1103/PhysRevB.86.224412;DEC 14 2012;2012;The intensity of electron spin resonance (ESR) of the nanoscale;molecular magnet V-15 is studied. We calculate the temperature;dependence of the intensity at temperatures from high to low. In;particular, we find that the low-temperature ESR intensity is;significantly affected by the Dzyaloshinsky-Moriya interaction. DOI:;10.1103/PhysRevB.86.224412;1;0;0;0;1;1098-0121;WOS:000312364500003;;;J;Meinert, Markus;Friedrich, Christoph;Reiss, Guenter;Bluegel, Stefan;GW study of the half-metallic Heusler compounds Co2MnSi and Co2FeSi;PHYSICAL REVIEW B;86;24;245115;10.1103/PhysRevB.86.245115;DEC 14 2012;2012;Quasiparticle spectra of potentially half-metallic Co2MnSi and Co2FeSi;Heusler compounds have been calculated within the one-shot GW;approximation in an all-electron framework without adjustable;parameters. For Co2FeSi the many-body corrections are crucial: a;pseudogap opens and good agreement of the magnetic moment with;experiment is obtained. Otherwise, however, the changes with respect to;the density-functional-theory starting point are moderate. For both;cases we find that photoemission and x-ray absorption spectra are well;described by the calculations. By comparison with the GW density of;states, we conclude that the Kohn-Sham eigenvalue spectrum provides a;reasonable approximation for the quasiparticle spectrum of the Heusler;compounds considered in this work. DOI: 10.1103/PhysRevB.86.245115;Reiss, Gunter/A-3423-2010; Meinert, Markus/E-8794-2011; Blugel, Stefan/J-8323-2013; Friedrich, Christoph/L-5029-2013;Reiss, Gunter/0000-0002-0918-5940; Blugel, Stefan/0000-0001-9987-4733;;Friedrich, Christoph/0000-0002-3315-7536;7;1;0;0;7;1098-0121;WOS:000312365400002;;;J;Misiorny, Maciej;Weymann, Ireneusz;Barnas, Jozef;Underscreened Kondo effect in S=1 magnetic quantum dots: Exchange,;anisotropy, and temperature effects;PHYSICAL REVIEW B;86;24;245415;10.1103/PhysRevB.86.245415;DEC 14 2012;2012;We present a theoretical analysis of the effects of uniaxial magnetic;anisotropy and contact-induced exchange field on the underscreened Kondo;effect in S = 1 magnetic quantum dots coupled to ferromagnetic leads.;First, by using the second-order perturbation theory we show that the;coupling to spin-polarized electrode results in an effective exchange;field B-eff and an effective magnetic anisotropy D-eff. Second, we;confirm these findings by using the numerical renormalization group;method, which is employed to study the dependence of the quantum-dot;spectral functions, as well as quantum-dot spin, on various parameters;of the system. We show that the underscreened Kondo effect is generally;suppressed due to the presence of effective exchange field and can be;restored by tuning the anisotropy constant, when vertical bar D-eff;vertical bar = |B-eff vertical bar. The Kondo effect can also be;restored by sweeping an external magnetic field, and the restoration;occurs twice in a single sweep. From the distance between the restored;Kondo resonances one can extract the information about both the exchange;field and the effective anisotropy. Finally, we calculate the;temperature dependence of linear conductance for the parameters where;the Kondo effect is restored and show that the restored Kondo resonances;display a universal scaling of S = 1/2 Kondo effect. DOI:;10.1103/PhysRevB.86.245415;3;0;0;0;3;1098-0121;WOS:000312365400007;;;J;Monette, Gabriel;Nateghi, Nima;Masut, Remo A.;Francoeur, Sebastien;Menard, David;Plasmonic enhancement of the magneto-optical response of MnP;nanoclusters embedded in GaP epilayers;PHYSICAL REVIEW B;86;24;245312;10.1103/PhysRevB.86.245312;DEC 14 2012;2012;We report on the magneto-optical activity of MnP nanoclusters embedded;in GaP epilayers and MnP thin film as a function of temperature,;magnetic field, and wavelength in the near infrared and visible. The;measured Faraday rotation originates from the ferromagnetic;magnetization of the metallic MnP phase and exhibits a hysteretic;behavior as a function of an externally applied magnetic field closely;matching that of the magnetization. The Faraday rotation spectrum of MnP;shows a magnetoplasmonic resonance whose energy depends on the MnP;filling factor and surrounding matrix permittivity. At resonance, the;measured rotary power for the epilayer systems increases by a factor of;2 compared to that of the MnP film in terms of degrees of rotation per;MnP thickness for an applied magnetic field of 410 mT. We propose an;effective medium model, which qualitatively reproduces the Faraday;rotation and the magnetocircular dichroism spectra, quantitatively;determines the spectral shift induced by variations in the MnP volume;fraction, and demonstrates the influence of the shape and orientation;distributions of ellipsoidal MnP nanoclusters on the magneto-optical;activity and absorption spectra. DOI: 10.1103/PhysRevB.86.245312;Menard, David/A-6862-2010; Francoeur, Sebastien/E-6614-2011; Masut, Remo/I-3727-2014;Menard, David/0000-0003-2207-3422;;2;0;0;0;2;1098-0121;WOS:000312365400003;;;J;Morgan, Steven W.;Oganesyan, Vadim;Boutis, Gregory S.;Multispin correlations and pseudothermalization of the transient density;matrix in solid-state NMR: Free induction decay and magic echo;PHYSICAL REVIEW B;86;21;214410;10.1103/PhysRevB.86.214410;DEC 14 2012;2012;Quantum unitary evolution typically leads to thermalization of generic;interacting many-body systems. There are very few known general methods;for reversing this process, and we focus on the magic echo, a;radio-frequency pulse sequence known to approximately "rewind" the time;evolution of dipolar coupled homonuclear spin systems in a large;magnetic field. By combining analytic, numerical, and experimental;results, we systematically investigate factors leading to the;degradation of magic echoes, as observed in reduced revival of mean;transverse magnetization. Going beyond the conventional analysis based;on mean magnetization, we use a phase-encoding technique to measure the;growth of spin correlations in the density matrix at different points in;time following magic echoes of varied durations and compare the results;to those obtained during a free induction decay. While considerable;differences are documented at short times, the long-time behavior of the;density matrix appears to be remarkably universal among the types of;initial states considered: simple low-order multispin correlations are;observed to decay exponentially at the same rate, seeding the onset of;increasingly complex high-order correlations. This manifestly athermal;process is constrained by conservation of the second moment of the;spectrum of the density matrix and proceeds indefinitely, assuming;unitary dynamics. DOI: 10.1103/PhysRevB.86.214410;3;0;0;0;3;1098-0121;WOS:000312364100002;;;J;Sung, N. H.;Roh, C. J.;Kim, K. S.;Cho, B. K.;Possible multigap superconductivity and magnetism in single crystals of;superconducting La2Pt3Ge5 and Pr2Pt3Ge5;PHYSICAL REVIEW B;86;22;224507;10.1103/PhysRevB.86.224507;DEC 14 2012;2012;We herein describe our investigation of the superconducting and magnetic;properties of the rare-earth ternary germanide intermetallic compounds;La2Pt3Ge5 and Pr2Pt3Ge5. Single crystals of La2Pt3Ge5 and Pr2Pt3Ge5 were;synthesized using the high-temperature metal flux method. Both types of;crystal formed in a U2Co3Si5-type orthorhombic structure (space group;Ibam). La2Pt3Ge5 showed the onset of superconducting phase transition at;T-c = 8.1 K, which, to the best of our knowledge, is the highest Tc of;all the R2M3X5 (R = rare-earth elements, M = transition metal, and X =;s-p metal) superconductors, and from the specific heat data, it was;found to have multigap superconductivity. Pr2Pt3Ge5 showed both a;superconducting phase transition at T-c = 7.8 K and two;antiferromagnetic transitions at T-N1 = 3.5 K and T-N2 = 4.2 K, which;indicates the coexistence of superconductivity and magnetism. However,;the correlation between the superconductivity and the magnetism was too;weak to be observed. In its normal state, Pr2Pt3Ge5 revealed strong;magnetic anisotropy, probably due to the crystalline electric field;effect. DOI: 10.1103/PhysRevB.86.224507;1;0;0;0;1;1098-0121;WOS:000312364500004;;;J;Suzuki, Takafumi;Sato, Masahiro;Gapless edge states and their stability in two-dimensional quantum;magnets;PHYSICAL REVIEW B;86;22;224411;10.1103/PhysRevB.86.224411;DEC 14 2012;2012;We study the nature of edge states in extrinsically and spontaneously;dimerized states of two-dimensional spin-1/2 antiferromagnets, by;performing quantum Monte Carlo simulation. We show that a gapless edge;mode emerges in the wide region of the dimerized phases, and the;critical exponent of spin correlators along the edge deviates from the;value of Tomonaga-Luttinger liquid (TLL) universality in large but;finite systems at low temperatures. We also demonstrate that the gapless;nature at edges is stable against several perturbations such as external;magnetic field, easy-plane XXZ anisotropy, Dzyaloshinskii-Moriya;interaction, and further-neighbor exchange interactions. The edge states;exhibit non-TLL behavior, depending strongly on model parameters and;kinds of perturbations. Possible ways of detecting these edge states are;discussed. Properties of edge states we show in this paper could also be;used as reference points to study other edge states of more exotic;gapped magnetic phases such as spin liquids. DOI:;10.1103/PhysRevB.86.224411;0;0;0;0;0;1098-0121;WOS:000312364500002;;;J;Tian, H. Y.;Chan, K. S.;Wang, J.;Efficient spin injection in graphene using electron optics;PHYSICAL REVIEW B;86;24;245413;10.1103/PhysRevB.86.245413;DEC 14 2012;2012;We investigate theoretically spin injection efficiency from the;ferromagnetic graphene to normal graphene (FG/NG) based on electron;optics, where the magnetization in the FG is assumed from the magnetic;proximity effect. Based on a graphene lattice model, we demonstrated;that one spin-species electron flow from a point source could be nearly;suppressed through the FG-NG interface, when the total internal;reflection effect occurs with the help of an additional barrier masking;the Klein tunneling, while the opposite spin-species electron flow could;even be collimated due to the negative refraction under suitable;parameters. Not only at the focusing point is the efficient spin;injection achieved, but in the whole NG region the spin injection;efficiency can also be maintained at a high level. It is also shown that;the nonideal FG-NG interface could reduce the spin injection efficiency;since the electron optics phenomena are weakened owing to the;interfacial backscattering. Our findings may shed light on making;graphene-based spin devices in the spintronics field. DOI:;10.1103/PhysRevB.86.245413;3;0;2;0;3;1098-0121;WOS:000312365400005;;;J;Vasko, F. T.;Mitin, V. V.;Ryzhii, V.;Otsuji, T.;Interplay of intra- and interband absorption in a disordered graphene;PHYSICAL REVIEW B;86;23;235424;10.1103/PhysRevB.86.235424;DEC 14 2012;2012;The absorption of heavily doped graphene in the terahertz and;midinfrared spectral regions is considered, taking into account both the;elastic scattering due to finite-range disorder and the variations of;concentration due to long-range disorder. The interplay between intra-;and interband transitions is analyzed for the high-frequency regime of;response, near the Pauli blocking threshold. The gate voltage and;temperature dependencies of the absorption efficiency are calculated. It;is demonstrated that for typical parameters, the smearing of the;interband absorption edge is determined by a partly screened;contribution to long-range disorder while the intraband absorption is;determined by finite-range scattering. The latter yields the spectral;dependencies which deviate from those following from the Drude formula.;The obtained dependencies are in agreement with recent experimental;results. The comparison of the results of our calculations with the;experimental data provides a possibility to extract the disorder;characteristics. DOI: 10.1103/PhysRevB.86.235424;10;0;0;0;10;1098-0121;WOS:000312365100007;;;J;Violante, C.;Conte, A. Mosca;Bechstedt, F.;Pulci, O.;Geometric, electronic, and optical properties of the Si(111)2x1 surface:;Positive and negative buckling;PHYSICAL REVIEW B;86;24;245313;10.1103/PhysRevB.86.245313;DEC 14 2012;2012;The Si(111)2x1 is among the most investigated surfaces. Nonetheless,;several issues are still not understood. Its reconstruction is well;explained in terms of the Pandey model with a slight buckling (tilting);of the topmost atoms; two different isomers of the surface,;conventionally named positive and negative buckling, exist. Usually,;scanning tunneling microscopy (STM) experiments identify the positive;buckling isomer as the stable reconstruction at room temperature.;However, at low temperatures and for high n doping of the substrate,;recent scanning tunneling spectroscopy (STS) measurements found the;coexistence of positive and negative buckling on the Si(111) 2x1;surface. In this work, state-of-the-art ab initio methods, based on;density functional theory and on many-body perturbation theory, have;been used to obtain structural, electronic, and optical properties of;Si(111) 2x1 positive and negative buckling. The theoretical reflectance;anisotropy spectra (RAS), with the inclusion of the excitonic effects,;can provide a way to deepen the understanding of the coexistence of the;isomers. DOI: 10.1103/PhysRevB.86.245313;5;0;0;0;5;1098-0121;WOS:000312365400004;;;J;Yuge, Tatsuro;Sagawa, Takahiro;Sugita, Ayumu;Hayakawa, Hisao;Geometrical pumping in quantum transport: Quantum master equation;approach;PHYSICAL REVIEW B;86;23;235308;10.1103/PhysRevB.86.235308;DEC 14 2012;2012;For an open quantum system, we investigate the pumped current induced by;a slow modulation of control parameters on the basis of the quantum;master equation and full counting statistics. We find that the average;and the cumulant generating function of the pumped quantity are;characterized by the geometrical Berry-phase-like quantities in the;parameter space, which is associated with the generator of the master;equation. From our formulation, we can discuss the geometrical pumping;under the control of the chemical potentials and temperatures of;reservoirs. We demonstrate the formulation by spinless electrons in;coupled quantum dots. We show that the geometrical pumping is prohibited;for the case of noninteracting electrons if we modulate only;temperatures and chemical potentials of reservoirs, while the;geometrical pumping occurs in the presence of an interaction between;electrons. DOI: 10.1103/PhysRevB.86.235308;5;0;0;0;5;1098-0121;WOS:000312365100003;;;J;Zhang, Yanning;Wang, Hui;Wu, Ruqian;First-principles determination of the rhombohedral magnetostriction of;Fe100-xAlx and Fe100-xGax alloys;PHYSICAL REVIEW B;86;22;224410;10.1103/PhysRevB.86.224410;DEC 14 2012;2012;Through systematic density functional calculations using the full;potential linearized augmented plane-wave (FLAPW) method, the;rhombohedral magnetostriction (lambda(111)) of Fe100-xAlx and Fe100-xGax;alloys are studied for x up to 25. Theoretical calculations;satisfactorily reproduce the main features of experimental;lambda(111)(x) curves, except for dilute alloys with x < 5. Detailed;analyses on electronic and structural properties indicate the importance;of availability and symmetry of dangling bonds for the sign change of;lambda(111) around x = 16. In addition, the impurity induced local;distortion might be a possible reason for the disagreement between;theory and experiment for lambda(111) of the bulk bcc Fe. DOI:;10.1103/PhysRevB.86.224410;ZHANG, YANNING/A-3316-2013; Wu, Ruqian/C-1395-2013;0;0;0;0;0;1098-0121;WOS:000312364500001;;;J;Al Attar, Hameed A.;Monkman, Andrew P.;Controlled energy transfer between isolated donor-acceptor molecules;intercalated in thermally self-ensemble two-dimensional hydrogen bonding;cages;PHYSICAL REVIEW B;86;23;235420;10.1103/PhysRevB.86.235420;DEC 13 2012;2012;Thermally assembled hydrogen bonding cages which are neither size nor;guest specific have been developed using a poly (vinyl alcohol) (PVA);host. A water-soluble conjugated polymer;poly(2,5-bis(3-sulfonatopropoxy)-1,4-phenylene, disodium;salt-alt-1,4-phenylene) (PPP-OPSO3) as a donor and;tris(2,2-bipyridyl)-ruthenium(II) [Ru(bpy)(3)(2+)] as an acceptor have;been isolated and trapped in such a PVA matrix network. This is a unique;system that shows negligible exciton diffusion and the donor and;acceptor predominantly interact by a direct single step excitation;transfer process (DSSET). Singlet and triplet exciton quenching have;been studied. Time-resolved fluorescence lifetime measurement at;different acceptor concentrations has enabled us to determine the;dimensionality of the energy-transfer process within the PVA scaffold.;Our results reveal that the PVA hydrogen bonding network effectively;isolates the donor-acceptor molecules in a two-dimensional layer;structure (lamella) leading to the condition where a precise control of;the energy and charge transfer is possible.;Monkman, Andy/B-1521-2013;Monkman, Andy/0000-0002-0784-8640;0;0;0;0;0;1098-0121;WOS:000312291900005;;;J;Anzenberg, Eitan;Perkinson, Joy C.;Madi, Charbel S.;Aziz, Michael J.;Ludwig, Karl F., Jr.;Nanoscale surface pattern formation kinetics on germanium irradiated by;Kr+ ions;PHYSICAL REVIEW B;86;24;10.1103/PhysRevB.86.245412;DEC 13 2012;2012;Nanoscale surface topography evolution on Ge surfaces irradiated by 1;keV Kr+ ions is examined in both directions perpendicular and parallel;to the projection of the ion beam on the surface. Grazing incidence;small angle x-ray scattering is used to measure in situ the evolution of;surface morphology via the linear dispersion relation. A transition from;smoothing (stability) to pattern-forming instability is observed at a;critical ion incidence angle of approximately 62 degrees with respect to;the surface normal. The linear theory quadratic coefficients which;determine the surface stability/instability are determined as a function;of bombardment angle. The Ge surface evolution during Kr+ irradiation is;qualitatively similar to that observed for Ar+ irradiation of Si.;However, in contrast to the case of Si under Ar+ irradiation, the;critical angle separating stability and instability for Ge under Kr+;irradiation cannot be quantitatively reproduced by the simple;Carter-Vishnyakov mass redistribution model. DOI:;10.1103/PhysRevB.86.245412;5;0;0;0;5;1098-0121;WOS:000312292600006;;;J;Arnardottir, K. B.;Kyriienko, O.;Shelykh, I. A.;Hall effect for indirect excitons in an inhomogeneous magnetic field;PHYSICAL REVIEW B;86;24;245311;10.1103/PhysRevB.86.245311;DEC 13 2012;2012;We study the effect of an inhomogeneous out-of-plane magnetic field on;the behavior of two-dimensional (2D) spatially indirect excitons. Due to;the difference of the magnetic field acting on electrons and holes, the;total Lorentz force affecting the center of mass motion of an indirect;exciton appears. Consequently, an indirect exciton acquires an effective;charge proportional to the gradient of the magnetic field. The;appearance of the Lorentz force causes the Hall effect for neutral;bosons, which can be detected by measurement of the spatially;inhomogeneous blueshift of the photoluminescence using a counterflow;experiment. DOI: 10.1103/PhysRevB.86.245311;Kyriienko, Oleksandr/M-5163-2014;Kyriienko, Oleksandr/0000-0002-6259-6570;2;0;0;0;2;1098-0121;WOS:000312292600004;;;J;Baek, S. -H.;Loew, T.;Hinkov, V.;Lin, C. T.;Keimer, B.;Buechner, B.;Grafe, H. -J.;Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single;crystals revealed by Cu-63 NMR;PHYSICAL REVIEW B;86;22;220504;10.1103/PhysRevB.86.220504;DEC 13 2012;2012;We report a Cu-63 NMR investigation in detwinned YBa2Cu3Oy single;crystals, focusing on the highly underdoped regime (y = 6.35-6.6).;Measurements of both the spectra and the spin-lattice relaxation rates;of Cu-63 uncover the emergence of static order at a well-defined onset;temperature T-0 with an as yet unknown order parameter. While T-0 is;rapidly suppressed with increasing hole doping concentration p, the spin;pseudogap was identified only near and above the doping content at which;T-0 -> 0. Our data indicate the presence of a critical hole doping p(c);similar to 0.1, which may control both the static order at p < p(c) and;the spin pseudogap at p > p(c). DOI: 10.1103/PhysRevB.86.220504;Baek, Seung-Ho/F-4733-2011;Baek, Seung-Ho/0000-0002-0059-8255;6;1;0;0;6;1098-0121;WOS:000312291200001;;;J;Bieri, Samuel;Serbyn, Maksym;Senthil, T.;Lee, Patrick A.;Paired chiral spin liquid with a Fermi surface in S=1 model on the;triangular lattice;PHYSICAL REVIEW B;86;22;224409;10.1103/PhysRevB.86.224409;DEC 13 2012;2012;Motivated by recent experiments on Ba3NiSb2O9, we investigate possible;quantum spin liquid ground states for spin S = 1 Heisenberg models on;the triangular lattice. We use variational Monte Carlo techniques to;calculate the energies of microscopic spin liquid wave functions where;spin is represented by three flavors of fermionic spinon operators.;These energies are compared with the energies of various competing;three-sublattice ordered states. Our approach shows that the;antiferromagnetic Heisenberg model with biquadratic term and single-ion;anisotropy does not have a low-temperature spin liquid phase. However,;for an SU(3)-invariant model with sufficiently strong ring-exchange;terms, we find a paired chiral quantum spin liquid with a Fermi surface;of deconfined spinons that is stable against all types of ordering;patterns we considered. We discuss the physics of this exotic spin;liquid state in relation to the recent experiment and suggest new ways;to test this scenario. DOI: 10.1103/PhysRevB.86.224409;Bieri, Samuel/L-1045-2013;11;0;0;0;11;1098-0121;WOS:000312291200002;;;J;Busch, M.;Seifert, J.;Meyer, E.;Winter, H.;Evidence for longitudinal coherence in fast atom diffraction;PHYSICAL REVIEW B;86;24;241402;10.1103/PhysRevB.86.241402;DEC 13 2012;2012;Angular distributions for grazing scattering of keV H atoms from an;Al2O3(11 (2) over bar0) surface were recorded. These distributions;reveal defined diffraction patterns which can be understood in terms of;quantum scattering from well-ordered surfaces. From the observation of;so-called Laue circles, we conclude a high degree of longitudinal;coherence for fast atom diffraction at surfaces which allows one to;resolve periodicity intervals of several 100 angstrom. We demonstrate;this feature in scattering experiments from the reconstructed (12 x 4);phase of an Al2O3(11 (2) over bar0) surface obtained after annealing at;temperatures of about 2000 K. DOI: 10.1103/PhysRevB.86.241402;4;0;0;0;4;1098-0121;WOS:000312292600002;;;J;Chen, Chien-Chun;Jiang, Huaidong;Rong, Lu;Salha, Sara;Xu, Rui;Mason, Thomas G.;Miao, Jianwei;Reply to "Comment on 'Three-dimensional imaging of a phase object from a;single sample orientation using an optical laser'";PHYSICAL REVIEW B;86;22;226102;10.1103/PhysRevB.86.226102;DEC 13 2012;2012;In a technical comment to our paper [Phys. Rev. B 84, 224104 (2011)],;Wei and Liu criticized our work without providing theoretical,;numerical, or experimental evidence. Furthermore, we believe they;misinterpreted our matrix rank analysis of ankylography and their;statements about our experiment are inaccurate. Below is our detailed;point-by-point response to their criticisms. DOI:;10.1103/PhysRevB.86.226102;Rong, Lu/L-6195-2014;Rong, Lu/0000-0003-4614-6411;0;0;0;0;0;1098-0121;WOS:000312291200004;;;J;Dubail, J.;Read, N.;Rezayi, E. H.;Edge-state inner products and real-space entanglement spectrum of trial;quantum Hall states;PHYSICAL REVIEW B;86;24;245310;10.1103/PhysRevB.86.245310;DEC 13 2012;2012;We consider the trial wave functions for the fractional quantum Hall;effect that are given by conformal blocks, and construct their;associated edge excited states in full generality. The inner products;between these edge states are computed in the thermodynamic limit,;assuming generalized screening (i.e., short-range correlations only);inside the quantum Hall droplet and using the language of boundary;conformal field theory (boundary CFT). These inner products take;universal values in this limit: they are equal to the corresponding;inner products in the bulk two-dimensional chiral CFT which underlies;the trial wave function. This is a bulk/edge correspondence; it shows;the equality between equal-time correlators along the edge and the;correlators of the bulk CFT up to a Wick rotation. This approach is then;used to analyze the entanglement spectrum of the ground state obtained;with a bipartition A boolean OR B in real space. Starting from our;universal result for inner products in the thermodynamic limit, we;tackle corrections to scaling using standard field-theoretic and;renormalization- group arguments. We prove that generalized screening;implies that the entanglement Hamiltonian H-E = -ln rho(A) is;isospectral to an operator that is local along the cut between A and B.;We also show that a similar analysis can be carried out for particle;partition. We discuss the close analogy between the formalism of trial;wave functions given by conformal blocks and tensor product states, for;which results analogous to ours have appeared recently. Finally, the;edge theory and entanglement spectrum of p(x) +/- ip(y) paired;superfluids are treated in a similar fashion in the Appendixes. DOI:;10.1103/PhysRevB.86.245310;Read, Nicholas/J-6030-2012;14;0;0;0;14;1098-0121;WOS:000312292600003;;;J;He, Jiangang;Franchini, Cesare;
7:9:13:2     Materials properties of magnesium and calcium hydroxides from first-principles calculations
DOI:10.1016/j.commatsci.2014.07.007  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:1  AU: Pishtshev, A.;Karazhanov, S. Zh;Klopov, M.;
7:9:13:3     Pressure driven spin crossover and isostructural phase trans on in LaFeO3
DOI:10.1063/1.4858424  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Javaid, Saqib;Akhtar, M. Javed;Ahmad, Irfan;Younas, Muhammad;Shah, Shafqat H.;Ahmad, Iftikhar;
7:9:13:4     Pressure-induced magnetic, structural, and electronic phase transitions in LaFeO3: A density functional theory (generalized gradient approximation) plus U study
DOI:10.1063/1.4887802  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Javaid, Saqib;Akhtar, M. Javed;
7:9:13:5     Screened hybrid functional applied to 3d(0) -> 3d(8) transition-metal perovskites LaMO3 (M = Sc-Cu): Influence of the exchange mixing parameter on the structural, electronic, and magnetic properties (vol 86, 235117, 2012)
DOI:10.1103/PhysRevB.90.039907  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: He, Jiangang;Franchini, Cesare;
7:9:13:6     DOS Calculation Analysis of New Transparent Conductor Mg(OH)2-C
DOI:10.2320/matertrans.M2011046  JN:MATERIALS TRANSACTIONS  PY:2011
  TC:2  AU: Murakami, Takahiro;Honjo, Takamitsu;Kuji, Toshiro;
7:9:14:1     Mechanism and Role of Mechanochemical Activation in the Synthesis of (K,Na,Li)(Nb,Ta)O-3 Ceramics
DOI:10.1111/j.1551-2916.2010.03643.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Rojac, Tadej;Bencan, Andreja;Kosec, Marija;
7:9:14:2     Mechanochemical synthesis of NaNbO3: A complementary study of reaction mechanism using Raman spectroscopy and quadrupole perturbed Na-23 nuclear magnetic resonance
DOI:10.1016/j.ssi.2012.02.060  JN:SOLID STATE IONICS  PY:2012
  TC:6  AU: Rojac, T.;Malic, B.;Kosec, M.;Polomska, M.;Hilczer, B.;Zupancic, B.;Zalar, B.;
7:9:14:3     Combined Analytical Transmission Electron Microscopy Approach to Reliable Composition Evaluation of KTaO3
DOI:10.1111/j.1551-2916.2010.04288.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:1  AU: Tchernychova, Elena;Glinsek, Sebastjan;Malic, Barbara;Kosec, Marija;
7:9:14:4     KTaO3 Ceramics Prepared by the Mechanochemically Activated Solid-State Synthesis
DOI:10.1111/j.1551-2916.2010.04254.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Glinsek, Sebastjan;Malic, Barbara;Rojac, Tadej;Filipic, Cene;Budic, Bojan;Kosec, Marija;
7:9:14:5     Mechanochemical reactions in Na2CO3-M2O5 (M = V, Nb, Ta) powder mixtures: Influence of transition-metal oxide on reaction rate
DOI:10.1016/j.ssi.2011.03.011  JN:SOLID STATE IONICS  PY:2011
  TC:6  AU: Rojac, Tadej;Trtnik, Ziva;Kosec, Marija;
7:9:14:6     Chemistry, Processing, and Microwave Dielectric Properties of Mn-Substituted KTaO3 Ceramics
DOI:10.1111/j.1551-2916.2009.03467.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Axelsson, Anna-Karin;Pan, Yuya;Valant, Matjaz;Alford, Neil McN.;
7:9:14:7     Influence of point defects in KTaO3 on low-temperature dielectric relaxation
DOI:10.1016/j.jeurceramsoc.2009.09.034  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:2  AU: Axelsson, Anna-Karin;Valant, Matjaz;Alford, Neil McN.;
7:9:15:1     Characterization and magnetic properties of LaFeO3 nanofibers synthesized by electrospinning
DOI:10.1016/j.jallcom.2013.08.191  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:12  AU: Lee, Won-Yong;Yun, Hyung Joong;Yoon, Jong-Won;
7:9:15:2     Surface and shape anisotropy effects in LaFeO3 nanoparticles
DOI:10.1063/1.3590389  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Wang, Dan;Gong, Menglian;
7:9:15:3     Synthesis of large surface area LaFeO3 nanoparticles by SBA-16 template method as high active visible photocatalysts
DOI:10.1007/s11051-009-9647-5  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2010
  TC:31  AU: Su, Haijiao;Jing, Liqiang;Shi, Keying;Yao, Changhao;Fu, Honggang;
7:9:15:4     Structural, magnetic and Eu-151 Mossbauer studies of mechanosynthesized nanocrystalline EuCr1-xFexO3 particles
DOI:10.1016/j.actamat.2013.04.015  JN:ACTA MATERIALIA  PY:2013
  TC:3  AU: Widatallah, H. M.;Al-Shahumi, T. M.;Klencsar, Z.;Pekala, M.;Gismelseed, A. M.;Al-Omari, I. A.;Al-Rawas, A. D.;Seifu, D.;
7:9:16:1     Structural and optical characterization of BaSnO3 nanopowder synthesized through a novel combustion technique
DOI:10.1016/j.jallcom.2010.10.056  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:20  AU: Deepa, A. S.;Vidya, S.;Manu, P. C.;Solomon, Sam;John, Annamma;Thomas, J. K.;
7:9:16:2     Structural, optical and magnetic properties of Fe-doped barium stannate thin films grown by PLD
DOI:10.1016/j.apsusc.2013.05.076  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: James, K. K.;Aravind, Arun;Jayaraj, M. K.;
7:9:16:3     Difference in the Nature of Eu3+ Environment in Eu3+-Doped BaTiO3 and BaSnO3
DOI:10.1111/jace.12596  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:1  AU: Patel, Dinesh K.;Vishwanadh, Bathula;Sudarsan, Vasanthakumaran;Kulshreshtha, Shailendra K.;
7:9:16:4     Synthesis and characterization of terbium-doped SrSnO3 pigments
DOI:10.1016/j.ceramint.2014.04.110  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:1  AU: Dohnalova, Zaneta;Gorodylova, Nataliia;Sulcova, Petra;Vlcek, Milan;
7:9:16:5     A Two-StepMethod to Synthesize BaSn(OH)(6) Crystalline Nanorods and Their Thermal Decomposition to Barium Stannate
DOI:10.1155/2012/912731  JN:JOURNAL OF NANOMATERIALS  PY:2012
  TC:0  AU: Wu, Xiaohong;Lv, Gang;Hu, Xiaoyan;Tang, Yiwen;
7:9:16:6     Hexagonal BaTiO3:Eu3(+) Nanoparticles: A Kinetically Stable Phase Prepared at Low Temperatures
DOI:10.1111/j.1551-2916.2010.04077.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Patel, Dinesh K.;Vishwanadh, Bathula;Sudarsan, Vasanthakumaran;Vatsa, Rajesh K.;Kulshreshtha, Shailendra K.;
7:9:17:1     Structure and magnetic properties of GdxY1-xFeO3 obtained by mechanosynthesis
DOI:10.1016/j.jallcom.2013.04.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:1  AU: Bolarin-Miro, A. M.;Sanchez-De Jesus, F.;Cortes-Escobedo, C. A.;Valenzuela, R.;Ammar, S.;
7:9:17:2     Mechanochemically assisted synthesis of yttrium-lanthanum orthoferrite: Structural and magnetic characterization
DOI:10.1016/j.jallcom.2009.10.061  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:7  AU: Cristobal, A. A.;Botta, P. M.;Bercoff, P. G.;Aglietti, E. F.;Bertorello, H. R.;Porto Lopez, J. M.;
7:9:17:3     Synthesis, structure and magnetic properties of distorted YxLa1-xFeO3: Effects of mechanochemical activation and composition
DOI:10.1016/j.matchemphys.2011.09.014  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:5  AU: Cristobal, A. A.;Botta, P. M.;Aglietti, E. F.;Conconi, M. S.;Bercoff, P. G.;Porto Lopez, J. M.;
7:9:18:1     Simple fabrication of polyhedral grain-like microparticle Cu0.5Zn0.5HPO4 center dot H2O and porous structure CuZnP2O7
DOI:10.1016/j.ceramint.2011.07.022  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:2  AU: Boonchom, Banjong;Vittayakorn, Naratip;
7:9:18:2     Solid solutions of mixed metal Mn3-xMgxFe4(PO4)(6) orthophosphates: Colouring performance within a double-firing ceramic glaze
DOI:10.1016/j.ceramint.2010.09.004  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:2  AU: Llusar, M.;Badenes, J. A.;Garcia, A.;Gargori, C.;Galindo, R.;Monros, G.;
7:9:18:3     Blue-violet ceramic pigments based on Co and Mg Co2-xMgxP2O7 diphosphates
DOI:10.1016/j.jeurceramsoc.2010.03.017  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Llusar, M.;Zielinska, A.;Tena, M. A.;Badenes, J. A.;Monros, G.;
7:9:18:4     Synthesis of diphosphate Mn2-xMgxP2O7 solid solutions with thortveitite structure: New pink ceramic dyes for the colouration of ceramic glazes
DOI:10.1016/j.jeurceramsoc.2011.10.051  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:4  AU: Llusar, M.;Garcia, A.;Gargori, C.;Galindo, R.;Badenes, J. A.;Monros, G.;
7:9:18:5     Synthesis and ferromagnetic property of new binary copper iron pyrophosphate CuFeP2O7
DOI:10.1016/j.matlet.2009.10.058  JN:MATERIALS LETTERS  PY:2010
  TC:5  AU: Boonchom, Banjong;Vittayakorn, Naratip;
7:9:18:6     A facile microwave-induced synthesis of titanium pyrophosphate nanocrystals
DOI:10.1016/j.matlet.2012.06.009  JN:MATERIALS LETTERS  PY:2012
  TC:1  AU: Wang, Rui;Ye, Junwei;Ning, Guiling;Jiang, Heng;Zhou, Weilei;Sun, Fuhong;
7:9:19:1     Influence of the sputtering reactive gas on the oxide and oxynitride La-Ti-O-N deposition by RF magnetron sputtering
DOI:10.1016/j.apsusc.2012.10.059  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:4  AU: Lu, Y.;Le Paven-Thivet, C.;Benzerga, R.;Le Gendre, L.;Sharaiha, A.;Tessier, F.;Chevire, F.;
7:9:19:2     Perovskite oxynitride LaTiOxNy thin films: Dielectric characterization in low and high frequencies
DOI:10.1016/j.tsf.2011.01.226  JN:THIN SOLID FILMS  PY:2011
  TC:8  AU: Lu, Y.;Ziani, A.;Le Paven-Thivet, C.;Benzerga, R.;Le Gendre, L.;Fasquelle, D.;Kassem, H.;Tessier, F.;Vigneras, V.;Carru, J. -C.;Sharaiha, A.;
7:9:19:3     Miniaturized notch antenna based on lanthanum titanium perovskite oxide thin films
DOI:10.1016/j.tsf.2014.04.011  JN:THIN SOLID FILMS  PY:2014
  TC:0  AU: Nguyen, H.;Benzerga, R.;Delaveaud, C.;Le Paven, C.;Lu, Y.;Sharaiha, A.;Le Gendre, L.;Deputier, S.;Tessier, F.;Chevire, F.;Castel, X.;
7:9:19:4     Pulsed laser deposition and characterisation of perovskite-type LaTiO3-xNx thin films
DOI:10.1016/j.actamat.2011.08.019  JN:ACTA MATERIALIA  PY:2011
  TC:4  AU: Marozau, I.;Shkabko, A.;Doebeli, M.;Lippert, T.;Mallepell, M.;Schneider, C. W.;Weidenkaff, A.;Wokaun, A.;
7:9:19:5     High electric tunability on oxynitride perovskite LaTiO2N thin films
DOI:10.1016/j.matlet.2011.06.095  JN:MATERIALS LETTERS  PY:2011
  TC:5  AU: Fasquelle, D.;Ziani, A.;Le Paven-Thivet, C.;Le Gendre, L.;Carru, J.;
7:9:20:1     A two step molten method for low temperature synthesis of La0.9Bi0.1AlO3 relaxor nanocrystalline
DOI:10.1016/j.jallcom.2013.09.075  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Wang, Sai;Hou, Yu-dong;Ge, Hai-yan;Zheng, Mu-peng;Zhu, Man-kang;Zhang, Ming;Yan, Hui;
7:9:20:2     Effect of annealing on the temperature-dependent dielectric properties of LaAlO3 at terahertz frequencies
DOI:10.1063/1.3679725  JN:AIP ADVANCES  PY:2012
  TC:4  AU: Zou, Xingquan;He, Mi;Springer, Daniel;Lee, Dongwook;Nair, Saritha K.;Cheong, Siew Ann;Wu, Tom;Panagopoulos, C.;Talbayev, D.;Chia, Elbert E. M.;
7:9:20:3     Dielectric relaxations of LaAlO3 ceramics over broad temperature range
DOI:10.1016/j.jallcom.2012.12.041  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:1  AU: Lei, Changmei;Wang, Chunchang;Wang, Guojing;Sun, Xiaohong;Li, Teng;Liu, Lina;
7:9:20:4     Bismuth-induced ferroelectric relaxor behavior in paraelectric LaAlO3
DOI:10.1063/1.3660777  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Si, Mei-Ju;Hou, Yu-Dong;Ge, Hai-Yan;Zhu, Man-Kang;Yan, Hui;
7:9:21:1     Ta L-3-edge XANES study of perovskite oxynitrides ATaO(2)N (A = Ca, Sr, Ba)
DOI:10.1016/j.jallcom.2013.10.155  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Paek, Seung-Min;Kim, Young-Il;
7:9:21:2     Role of initial potassium excess on the properties of potassium tantalate ceramics
DOI:10.1016/j.jeurceramsoc.2011.06.012  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:5  AU: Tkach, Alexander;Vilarinho, Paula M.;Almeida, Abilio;
7:9:21:3     Size-strain line broadening analysis of high-permittivity oxynitrides BaTaO2N and BaNbO2N
DOI:10.1016/j.ceramint.2011.10.078  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Kim, Young-Il;
7:9:22:1     K0.9982Li0.0018TaO3 Crystal Under External DC Electric Field
DOI:10.1080/00150193.2012.675266  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Trybula, Z.;Los, S. Z.;Trybula, M.;Kaszynska, K.;Dec, J.;Miga, S.;Laguta, V. V.;
7:9:22:2     Dynamics of Li+ dipoles at very low concentration in quantum paraelectric potassium tantalate
DOI:10.1063/1.3406202  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Dec, J.;Miga, S.;Trybula, Z.;Kaszynska, K.;Kleemann, W.;
7:9:22:3     Non-Linear Dielectric Susceptibility Near to the Field-Induced Ferroelectric Phase Transition of K0.937Li0.063TaO3
DOI:10.1080/00150193.2010.505462  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Miga, S.;Kleemann, W.;Dec, J.;
7:9:22:4     Does Highly Dilute KTaO3:Li Undergo Collective Glassy Freezing?
DOI:10.1080/00150193.2010.489873  JN:FERROELECTRICS  PY:2010
  TC:2  AU: Dec, J.;Miga, S.;Kleemann, W.;Trybula, Z.;Kaszynska, K.;
7:9:22:5     Ferroelectric Phase Transitions Viewed Via Nonlinear Dielectric Response
DOI:10.1080/00150193.2011.578500  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Dec, J.;Miga, S.;Kleemann, W.;
7:9:23:1     Electrical, optical and photoelectrochemical properties of BaSnO3-delta Applications to hydrogen evolution
DOI:10.1016/j.jallcom.2010.06.081  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Omeiri, S.;Hadjarab, B.;Bouguelia, A.;Trari, M.;
7:9:23:2     Dielectric and Impedance Spectroscopy of BaSnO3 and Ba2SnO4
DOI:10.1080/00150193.2014.892812  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Katiliute, R. M.;Seibutas, P.;Ivanov, M.;Grigalaitis, R.;Stanulis, A.;Banys, J.;Kareiva, A.;
7:9:23:3     Blue light emitting SrSn(OH)(6) nano-rods doped with lanthanide ions (Eu3+, Tb3+ and Dy3+)
DOI:10.1016/j.materresbull.2012.11.047  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:0  AU: Patel, D. K.;Nuwad, J.;Rajeswari, B.;Vishwanadh, B.;Sudarsan, V.;Vatsa, R. K.;Kadam, R. M.;Pillai, C. G. S.;Kulshreshtha, S. K.;
7:9:24:1     Topochemical Synthesis of Europium Molybdenum Oxynitride Pyrochlores
DOI:10.1021/cm101726b  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:7  AU: Yang, Minghui;Oro-Sole, Judith;Fuertes, Amparo;Attfield, J. Paul;
7:9:24:2     Preparation and neutron diffraction study of Dion-Jacobson type oxynitrides LiLaTa2O7-3xN2x (x=0.09, 0.29)
DOI:10.1016/j.materresbull.2012.11.069  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:3  AU: Lee, Eunhye;Kim, Seung-Joo;Paik, Younkee;Kim, Young-Il;
7:9:24:3     Dielectric oxynitride LaTiOxNy thin films deposited by reactive radio-frequency sputtering
DOI:10.1016/j.tsf.2011.10.192  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Ziani, A.;Le Paven-Thivet, C.;Fasquelle, D.;Le Gendre, L.;Benzerga, R.;Tessier, F.;Chevire, F.;Carru, J. C.;Sharaiha, A.;
7:10:1:1     On the energy harvesting potential of piezoaeroelastic systems
DOI:10.1063/1.3427405  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:98  AU: Erturk, A.;Vieira, W. G. R.;De Marqui, C., Jr.;Inman, D. J.;
7:10:1:2     Underwater energy harvesting from a heavy flag hosting ionic polymer metal composites
DOI:10.1063/1.3569738  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:54  AU: Giacomello, Alberto;Porfiri, Maurizio;
7:10:1:3     A T-shaped piezoelectric cantilever for fluid energy harvesting
DOI:10.1063/1.3503609  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:37  AU: Kwon, Soon-Duck;
7:10:1:4     A scalable concept for micropower generation using flow-induced self-excited oscillations
DOI:10.1063/1.3385780  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:23  AU: St Clair, D.;Bibo, A.;Sennakesavababu, V. R.;Daqaq, M. F.;Li, G.;
7:10:1:5     Hybrid piezoelectric-inductive flow energy harvesting and dimensionless electroaeroelastic analysis for scaling
DOI:10.1063/1.4789433  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Dias, J. A. C.;De Marqui, C., Jr.;Erturk, A.;
7:10:1:6     Energy exchange between a vortex ring and an ionic polymer metal composite
DOI:10.1063/1.3693184  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:21  AU: Peterson, Sean D.;Porfiri, Maurizio;
7:10:1:7     Performance enhancement of piezoelectric energy harvesters from wake galloping
DOI:10.1063/1.4816075  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Abdelkefi, A.;Scanlon, J. M.;McDowell, E.;Hajj, M. R.;
7:10:1:8     Comparative study of tip cross-sections for efficient galloping energy harvesting
DOI:10.1063/1.4792737  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:17  AU: Yang, Yaowen;Zhao, Liya;Tang, Lihua;
7:10:1:9     Dramatic enhancement of structure-borne wave energy harvesting using an elliptical acoustic mirror
DOI:10.1063/1.4719098  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Carrara, M.;Cacan, M. R.;Leamy, M. J.;Ruzzene, M.;Erturk, A.;
7:10:1:10     Performance of a piezoelectric energy harvester driven by air flow
DOI:10.1063/1.3676272  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Kwuimy, C. A. Kitio;Litak, G.;Borowiec, M.;Nataraj, C.;
7:10:1:11     On the optimal performance and universal design curves of galloping energy harvesters
DOI:10.1063/1.4861599  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Bibo, A.;Daqaq, M. F.;
7:10:1:12     Enhanced aeroelastic energy harvesting by exploiting combined nonlinearities: theory and experiment
DOI:10.1088/0964-1726/20/9/094007  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:31  AU: Sousa, V. C.;Anicezio, M. de M.;De Marqui, C., Jr.;Erturk, A.;
7:10:1:13     The experimental validation of a new energy harvesting system based on the wake galloping phenomenon
DOI:10.1088/0964-1726/20/5/055022  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:38  AU: Jung, Hyung-Jo;Lee, Seung-Woo;
7:10:1:14     Energy exchange during slamming impact of an ionic polymer metal composite
DOI:10.1063/1.4748577  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:13  AU: Cha, Y.;Phan, C. N.;Porfiri, M.;
7:10:1:15     Investigation of concurrent energy harvesting from ambient vibrations and wind using a single piezoelectric generator
DOI:10.1063/1.4811408  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:8  AU: Bibo, A.;Daqaq, M. F.;
7:10:1:16     Interactions of vortices with a flexible beam with applications in fluidic energy harvesting
DOI:10.1063/1.4861927  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Goushcha, O.;Elvin, N.;Andreopoulos, Y.;
7:10:1:17     Ambient wind energy harvesting using cross-flow fluttering
DOI:10.1063/1.3525045  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:59  AU: Li, Shuguang;Yuan, Jianping;Lipson, Hod;
7:10:1:18     Role of mass on the stability of flag/flags in uniform flow
DOI:10.1063/1.4813006  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:10  AU: Tian, Fang-Bao;
7:10:1:19     Energy harvesting using ionic electro-active polymer thin films with Ag-based electrodes
DOI:10.1088/0964-1726/19/4/045026  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:24  AU: Anand, S. V.;Arvind, K.;Bharath, P.;Mahapatra, D. Roy;
7:10:1:20     The performance of a self-excited fluidic energy harvester
DOI:10.1088/0964-1726/21/2/025007  JN:SMART MATERIALS & STRUCTURES  PY:2012
  TC:33  AU: Akaydin, H. D.;Elvin, N.;Andreopoulos, Y.;
7:10:1:21     Scaling the dynamic response and energy harvesting potential of piezoelectric beams
DOI:10.1063/1.4773210  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Akcabay, Deniz Tolga;Young, Yin Lu;
7:10:1:22     Ionic polymer transducers in sensing: Implications of the streaming potential hypothesis for varied electrode architecture and loading rate
DOI:10.1063/1.3456066  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Gao, Fei;Weiland, Lisa M.;
7:10:1:23     Aeroelastic flutter energy harvester design: the sensitivity of the driving instability to system parameters
DOI:10.1088/0964-1726/20/12/125017  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:21  AU: Bryant, Matthew;Wolff, Eric;Garcia, Ephrahim;
7:10:1:24     An energy harvester using piezoelectric cantilever beams undergoing coupled bending-torsion vibrations
DOI:10.1088/0964-1726/20/11/115007  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:31  AU: Abdelkefi, A.;Najar, F.;Nayfeh, A. H.;Ben Ayed, S.;
7:10:1:25     Design and performance of a centimetre-scale shrouded wind turbine for energy harvesting
DOI:10.1088/0964-1726/20/8/085021  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:8  AU: Howey, D. A.;Bansal, A.;Holmes, A. S.;
7:10:1:26     Generation of Lamb waves through surface mounted macro-fiber composite transducers
DOI:10.1088/0964-1726/20/2/025020  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:4  AU: Collet, M.;Ruzzene, M.;Cunefare, K. A.;
7:10:2:1     Energy-harvesting device with mechanical frequency-up conversion mechanism for increased power efficiency and wideband operation
DOI:10.1063/1.3360219  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:52  AU: Jung, Seok-Min;Yun, Kwang-Seok;
7:10:2:2     A two-dimensional broadband vibration energy harvester using magnetoelectric transducer
DOI:10.1063/1.4847755  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Yang, Jin;Wen, Yumei;Li, Ping;Yue, Xihai;Yu, Qiangmo;Bai, Xiaoling;
7:10:2:3     A multi-frequency sandwich type electromagnetic vibration energy harvester
DOI:10.1063/1.4722814  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Chen, Jingdong;Chen, Di;Yuan, Tao;Chen, Xiang;
7:10:2:4     Design and optimization of a bi-axial vibration-driven electromagnetic generator
DOI:10.1063/1.4895994  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yang, Jin;Yu, Qiangmo;Zhao, Jiangxin;Zhao, Nian;Wen, Yumei;Li, Ping;Qiu, Jing;
7:10:2:5     Pre-patterned ZnO nanoribbons on soft substrates for stretchable energy harvesting applications
DOI:10.1063/1.4807320  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Ma, Teng;Wang, Yong;Tang, Rui;Yu, Hongyu;Jiang, Hanqing;
7:10:2:6     A low profile vibro-impacting energy harvester with symmetrical stops
DOI:10.1063/1.3521265  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:26  AU: Moss, Scott;Barry, Alex;Powlesland, Ian;Galea, Steve;Carman, Gregory P.;
7:10:2:7     Tuning of nonlinear vibration via topology variation and its application in energy harvesting
DOI:10.1063/1.3676661  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:11  AU: Dai, Xuhan;Miao, Xiaodan;Sui, Linghe;Zhou, Hailin;Zhao, Xiaolin;Ding, Guifu;
7:10:2:8     A non-resonant, frequency up-converted electromagnetic energy harvester from human-body-induced vibration for hand-held smart system applications
DOI:10.1063/1.4867216  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:6  AU: Halim, Miah A.;Park, Jae Y.;
7:10:2:9     Energy Harvesting from Ambient Vibrations with Arbitrary In-Plane Motion Directions Using a Magnetostrictive/Piezoelectric Laminate Composite Transducer
DOI:10.1007/s11664-014-3056-y  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:1  AU: Yang, Jin;Wen, Yumei;Li, Ping;Yue, Xihai;Yu, Qiangmo;
7:10:2:10     A generator with nonlinear spring oscillator to provide vibrations of multi-frequency
DOI:10.1063/1.3664223  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Yang, Bin;Liu, Jingquan;Tang, Gang;Luo, Jiangbo;Yang, Chunsheng;Li, Yigui;
7:10:2:11     Broadband electromagnetic power harvester from vibrations via frequency conversion by impact oscillations
DOI:10.1063/1.4895927  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Yuksek, N. S.;Feng, Z. C.;Almasri, M.;
7:10:2:12     Power generation from human body motion through magnet and coil arrays with magnetic spring
DOI:10.1063/1.4865792  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zhang, Qian;Wang, Yufeng;Kim, Eun Sok;
7:10:2:13     On square-wave-driven stochastic resonance for energy harvesting in a bistable system
DOI:10.1063/1.4903167  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Su, Dongxu;Zheng, Rencheng;Nakano, Kimihiko;Cartmell, Matthew P.;
7:10:2:14     Random analysis on controlled buckling structure for energy harvesting
DOI:10.1063/1.4789998  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Wang, Yong;Ma, Teng;Yu, Hongyu;Jiang, Hanqing;
7:10:2:15     Frequency up-converted wide bandwidth piezoelectric energy harvester using mechanical impact
DOI:10.1063/1.4816249  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Halim, Miah A.;Khym, S.;Park, J. Y.;
7:10:2:16     Conceptual design of rotary magnetostrictive energy harvester
DOI:10.1063/1.4865976  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Park, Young-Woo;Kang, Han-Sam;Wereley, Norman M.;
7:10:3:1     Energy harvesting from base excitation of ionic polymer metal composites in fluid environments
DOI:10.1088/0964-1726/19/1/015003  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:102  AU: Aureli, Matteo;Prince, Chekema;Porfiri, Maurizio;Peterson, Sean D.;
7:10:3:2     Underwater thrust and power generation using flexible piezoelectric composites: an experimental investigation toward self-powered swimmer-sensor platforms
DOI:10.1088/0964-1726/20/12/125013  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:32  AU: Erturk, Alper;Delporte, Ghislain;
7:10:3:3     Finite amplitude vibrations of a sharp-edged beam immersed in a viscous fluid near a solid surface
DOI:10.1063/1.4765029  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Grimaldi, Emma;Porfiri, Maurizio;Soria, Leonardo;
7:10:3:4     Nonlinear finite amplitude torsional vibrations of cantilevers in viscous fluids
DOI:10.1063/1.4730383  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Aureli, Matteo;Pagano, Christopher;Porfiri, Maurizio;
7:10:3:5     Low frequency and large amplitude oscillations of cantilevers in viscous fluids
DOI:10.1063/1.3405720  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:26  AU: Aureli, Matteo;Porfiri, Maurizio;
7:10:3:6     Temporally-resolved hydrodynamics in the vicinity of a vibrating ionic polymer metal composite
DOI:10.1063/1.3410727  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:17  AU: Prince, Chekema;Lin, Weiyang;Lin, Jenny;Peterson, Sean D.;Porfiri, Maurizio;
7:10:3:7     A particle image velocimetry study of the flow physics generated by a thin lamina oscillating in a viscous fluid
DOI:10.1063/1.4863721  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Jalalisendi, Mohammad;Panciroli, Riccardo;Cha, Youngsu;Porfiri, Maurizio;
7:10:3:8     Nonlinear hydrodynamic damping of sharp-edged cantilevers in viscous fluids undergoing multi-harmonic base excitation
DOI:10.1063/1.4769307  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:11  AU: Facci, Andrea L.;Porfiri, Maurizio;
7:10:3:9     Preparation and characterization of lead-free (K0.47Na0.51Li0.02)(Nb0.8Ta0.2)O-3 piezoceramic/epoxy composites with 0-3 connectivity
DOI:10.1016/j.ceramint.2011.04.096  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Le, Duc Thang;Do, Nam Binh;Kim, Dae Uk;Hong, Inki;Kim, Ill-Whan;Lee, Jae Shin;
7:10:3:10     Temporally-resolved hydrodynamics in the vicinity of a vibrating ionic polymer metal composite (vol 107, 094908, 2010)
DOI:10.1063/1.3689755  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Prince, Chekema;Lin, Weiyang;Lin, Jenny;Peterson, Sean D.;Porfiri, Maurizio;
7:10:3:11     Finite amplitude vibrations of a sharp-edged beam immersed in a viscous fluid near a solid surface (vol 112, 104907, 2012)
DOI:10.1063/1.4775734  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Grimaldi, Emma;Porfiri, Maurizio;Soria, Leonardo;
7:10:4:1     Energy harvesting from self-sustained aeroelastic limit cycle oscillations of rectangular wings
DOI:10.1063/1.4895457  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Zhao, Dan;Ega, Evan;
7:10:4:2     Development of piezoelectric microcantilever flow sensor with wind-driven energy harvesting capability
DOI:10.1063/1.4723846  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:20  AU: Liu, Huicong;Zhang, Songsong;Kathiresan, Ramprakash;Kobayashi, Takeshi;Lee, Chengkuo;
7:10:4:3     Rainwater- and air-driven 40 mm bladeless electromagnetic energy harvester
DOI:10.1063/1.4813907  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Zhao, Dan;Khoo, Joe;
7:10:4:4     Polymer piezoelectric energy harvesters for low wind speed
DOI:10.1063/1.4861187  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Li, Dong Jun;Hong, Seungbum;Gu, Shiyuan;Choi, YoonYoung;Nakhmanson, Serge;Heinonen, Olle;Karpeev, Dmitry;No, Kwangsoo;
7:10:4:5     Energy harvesting from a convection-driven Rijke-Zhao thermoacoustic engine
DOI:10.1063/1.4767914  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:21  AU: Zhao, Dan;Chew, Y.;
7:10:4:6     Energy harvesting from a standing wave thermoacoustic-piezoelectric resonator
DOI:10.1063/1.4712630  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:24  AU: Smoker, J.;Nouh, M.;Aldraihem, O.;Baz, A.;
7:10:4:7     Dual-mode operation of flexible piezoelectric polymer diaphragm for intracranial pressure measurement
DOI:10.1063/1.3299003  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Li, Chunyan;Wu, Pei-Ming;Shutter, Lori A.;Narayan, Raj K.;
7:10:4:8     Smart catheter flow sensor for real-time continuous regional cerebral blood flow monitoring
DOI:10.1063/1.3669705  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Li, Chunyan;Wu, Pei-Ming;Hartings, Jed A.;Wu, Zhizhen;Ahn, Chong H.;LeDoux, David;Shutter, Lori A.;Narayan, Raj K.;
7:10:4:9     Elastically bounded flapping wing for energy harvesting
DOI:10.1063/1.4729936  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:10  AU: Boragno, C.;Festa, R.;Mazzino, A.;
7:10:4:10     Parametric energy conversion of thermoacoustic vibrations
DOI:10.1063/1.4714693  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Guthy, C.;Van Neste, A. C. W.;Mitra, S.;Bhattacharjee, S.;Thundat, T.;
7:10:4:11     Multimodal piezoelectric wind energy harvesters
DOI:10.1088/0964-1726/20/8/085030  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:10  AU: Ovejas, V. J.;Cuadras, A.;
7:10:4:12     Rainwater- and air-driven 40 mm bladeless electromagnetic energy harvester (vol 103, 033904, 2013)
DOI:10.1063/1.4902876  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Zhao, Dan;Khoo, Joe;
7:10:5:1     A piezoelectric bistable plate for nonlinear broadband energy harvesting
DOI:10.1063/1.3487780  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:83  AU: Arrieta, A. F.;Hagedorn, P.;Erturk, A.;Inman, D. J.;
7:10:5:2     Bi-stable energy harvesting based on a simply supported piezoelectric buckled beam
DOI:10.1063/1.4821644  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Xu, Chundong;Liang, Zhu;Ren, Bo;Di, Wenning;Luo, Haosu;Wang, Dong;Wang, Kailing;Chen, Zhifang;
7:10:5:3     Energy harvesting in the super-harmonic frequency region of a twin-well oscillator
DOI:10.1063/1.3684579  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:34  AU: Masana, R.;Daqaq, M. F.;
7:10:5:4     Enhanced buckled-beam piezoelectric energy harvesting using midpoint magnetic force
DOI:10.1063/1.4816518  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Zhu, Yang;Zu, Jean W.;
7:10:5:5     Broadband vibration energy harvesting based on cantilevered piezoelectric bi-stable composites
DOI:10.1063/1.4803918  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Arrieta, A. F.;Delpero, T.;Bergamini, A. E.;Ermanni, P.;
7:10:5:6     Energy harvesting from coherent resonance of horizontal vibration of beam excited by vertical base motion
DOI:10.1063/1.4895921  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Lan, C. B.;Qin, W. Y.;
7:10:5:7     Optimal configurations of bistable piezo-composites for energy harvesting
DOI:10.1063/1.3693523  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:17  AU: Betts, D. N.;Kim, H. A.;Bowen, C. R.;Inman, D. J.;
7:10:5:8     Variable stiffness characteristics of embeddable multi-stable composites
DOI:10.1016/j.compscitech.2014.03.017  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2014
  TC:5  AU: Arrieta, Andres F.;Kuder, Izabela K.;Waeber, Tobias;Ermanni, Paolo;
7:10:5:9     Passive load alleviation bi-stable morphing concept
DOI:10.1063/1.4739412  JN:AIP ADVANCES  PY:2012
  TC:9  AU: Arrieta, A. F.;Bilgen, O.;Friswell, M. I.;Hagedorn, P.;
7:10:6:1     A physics-based model of the electrical impedance of ionic polymer metal composites
DOI:10.1063/1.4729051  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:26  AU: Cha, Youngsu;Aureli, Matteo;Porfiri, Maurizio;
7:10:6:2     Effect of metal diffusion on mechanoelectric property of ionic polymer-metal composite
DOI:10.1063/1.3517447  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Tiwari, Rashi;Kim, Kwang J.;
7:10:6:3     Mechanoelectric transduction in ionic polymer-metal composite
DOI:10.1063/1.4798496  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Tiwari, Rashi;Kim, Kwang J.;
7:10:6:4     Electrode of ionic polymer-metal composite sensors: Modeling and experimental investigation
DOI:10.1063/1.4876255  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Shen, Qi;Kim, Kwang J.;Wang, Tianmiao;
7:10:6:5     Disc-shaped ionic polymer metal composites for use in mechano-electrical applications
DOI:10.1088/0964-1726/19/6/065016  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:38  AU: Tiwari, R.;Kim, K. J.;
7:10:6:6     Prediction of the ionic polymer transducer sensing of shear loading
DOI:10.1088/0964-1726/20/9/094013  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:28  AU: Zangrilli, U.;Weiland, L. M.;
7:10:6:7     Influence of temperature on the impedance of ionic polymer metal composites
DOI:10.1016/j.matlet.2014.06.183  JN:MATERIALS LETTERS  PY:2014
  TC:3  AU: Cha, Youngsu;Kim, Hubert;Porfiri, Maurizio;
7:10:6:8     Implications of multiscale modeling on sensing predictions in Nafion
DOI:10.1088/0964-1726/19/9/094011  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:5  AU: Zangrilli, U.;Gao, F.;Weiland, L. M.;
7:10:7:1     Broadband energy-harvesting using a two degree-of-freedom vibrating body
DOI:10.1063/1.3595278  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:30  AU: Kim, In-Ho;Jung, Hyung-Jo;Lee, Bo Mi;Jang, Seon-Jun;
7:10:7:2     Enhanced broadband piezoelectric energy harvesting using rotatable magnets
DOI:10.1063/1.4803445  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:10  AU: Zhou, Shengxi;Cao, Junyi;Erturk, Alper;Lin, Jing;
7:10:7:3     The magnetic coupling of a piezoelectric cantilever for enhanced energy harvesting efficiency
DOI:10.1088/0964-1726/19/4/045012  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:28  AU: Lin, Ji-Tzuoh;Lee, Barclay;Alphenaar, Bruce;
7:10:7:4     A nonlinear piezoelectric energy harvester with magnetic oscillator
DOI:10.1063/1.4748794  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:18  AU: Tang, Lihua;Yang, Yaowen;
7:10:7:5     An innovative tri-directional broadband piezoelectric energy harvester
DOI:10.1063/1.4830371  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Su, Wei-Jiun;Zu, Jean;
7:10:7:6     Towards an autonomous self-tuning vibration energy harvesting device for wireless sensor network applications
DOI:10.1088/0964-1726/20/2/025004  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:30  AU: Challa, Vinod R.;Prasad, M. G.;Fisher, Frank T.;
7:10:7:7     A tunable kinetic energy harvester with dynamic over range protection
DOI:10.1088/0964-1726/19/11/115005  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:5  AU: Ayala-Garcia, I. N.;Zhu, D.;Tudor, M. J.;Beeby, S. P.;
7:10:8:1     Ultra-wide bandwidth piezoelectric energy harvesting
DOI:10.1063/1.3629551  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:44  AU: Hajati, Arman;Kim, Sang-Gook;
7:10:8:2     Bistable springs for wideband microelectromechanical energy harvesters
DOI:10.1063/1.4775687  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:9  AU: Nguyen, Son D.;Halvorsen, Einar;Paprotny, Igor;
7:10:8:3     Three-dimensional micro electromechanical system piezoelectric ultrasound transducer
DOI:10.1063/1.4772469  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Hajati, Arman;Latev, Dimitre;Gardner, Deane;Hajati, Azadeh;Imai, Darren;Torrey, Marc;Schoeppler, Martin;
7:10:8:4     On the stochastic excitation of monostable and bistable electroelastic power generators: Relative advantages and tradeoffs in a physical system
DOI:10.1063/1.4795296  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:13  AU: Zhao, S.;Erturk, A.;
7:10:8:5     Monolithic ultrasonic integrated circuits based on micromachined semi-ellipsoidal piezoelectric domes
DOI:10.1063/1.4831988  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Hajati, Arman;Latev, Dimitre;Gardner, Deane;Ottosson, Mats;Imai, Darren;Torrey, Marc;Schoeppler, Martin;
7:10:8:6     Ultra-wide frequency broadening mechanism for micro-scale electromagnetic energy harvester
DOI:10.1063/1.4863565  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Liu, Huicong;Koh, Kah How;Lee, Chengkuo;
7:10:8:7     Experimental verification of a bridge-shaped, nonlinear vibration energy harvester
DOI:10.1063/1.4902116  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Gafforelli, Giacomo;Corigliano, Alberto;Xu, Ruize;Kim, Sang-Gook;
7:10:9:1     Powering pacemakers from heartbeat vibrations using linear and nonlinear energy harvesters
DOI:10.1063/1.3679102  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:42  AU: Karami, M. Amin;Inman, Daniel J.;
7:10:9:2     Charge redistribution in piezoelectric energy harvesters
DOI:10.1063/1.3685701  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:11  AU: Stewart, Mark;Weaver, Paul M.;Cain, Markys;
7:10:9:3     Size effect of flexible proof mass on the mechanical behavior of micron-scale cantilevers for energy harvesting applications
DOI:10.1063/1.3663858  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Kim, Miso;Hong, Seungbum;Miller, Dean J.;Dugundji, John;Wardle, Brian L.;
7:10:9:4     On the minimum coupling required for maximum theoretical power capture from vibration energy harvesters
DOI:10.1063/1.4749824  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Kim, D.;Hewa-Kasakarage, N. N.;Yoon, S.;Hall, N. A.;
7:10:9:5     Coulomb-damped resonant generators using piezoelectric transduction
DOI:10.1063/1.4726108  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Miller, L. M.;Mitcheson, P. D.;Halvorsen, E.;Wright, P. K.;
7:10:9:6     Enhanced energy harvesting performance of the piezoelectric unimorph with perpendicular electrodes
DOI:10.1063/1.4891851  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ma, Ming;Xia, Song;Li, Zhenrong;Xu, Zhuo;Yao, Xi;
7:10:9:7     Piezoelectric conversion and energy harvesting enhancement by initial energy injection
DOI:10.1063/1.3462304  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Lallart, Mickael;Guyomar, Daniel;
7:10:9:8     Medical Applications of Piezoelectric Microelectromechanical Systems
DOI:10.1080/10584587.2012.694741  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:0  AU: Griggio, F.;Kim, H.;Ural, S. O.;Jackson, T. N.;Choi, K.;Tutwiler, R. L.;Trolier-Mckinstry, S.;
7:10:9:9     Ear canal dynamic motion as a source of power for in-ear devices
DOI:10.1063/1.4792307  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Delnavaz, Aidin;Voix, Jeremie;
7:10:10:1     Magnetopiezoelastic energy harvesting driven by random excitations
DOI:10.1063/1.3436553  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:57  AU: Litak, G.;Friswell, M. I.;Adhikari, S.;
7:10:10:2     A broadband vibrational energy harvester
DOI:10.1063/1.4729875  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:9  AU: Van Blarigan, Louis;Danzl, Per;Moehlis, Jeff;
7:10:10:3     A magnetoelectric energy harvester with the magnetic coupling to enhance the output performance
DOI:10.1063/1.3677877  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Bai, Xiaoling;Wen, Yumei;Yang, Jin;Li, Ping;Qiu, Jing;Zhu, Ying;
7:10:10:4     Fabrication of Relaxer-Based Piezoelectric Energy Harvesters Using a Sacrificial Poly-Si Seeding Layer
DOI:10.1007/s11664-014-3308-x  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:2  AU: Fuentes-Fernandez, E. M. A.;Salomon-Preciado, A. M.;Gnade, B. E.;Quevedo-Lopez, M. A.;Shah, P.;Alshareef, H. N.;
7:10:10:5     The analysis of piezomagnetoelastic energy harvesters under broadband random excitations
DOI:10.1063/1.3560523  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:35  AU: Ali, S. F.;Adhikari, S.;Friswell, M. I.;Narayanan, S.;
7:10:10:6     Piezoelectric energy harvesting with parametric uncertainty
DOI:10.1088/0964-1726/19/10/105010  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:15  AU: Ali, S. F.;Friswell, M. I.;Adhikari, S.;
7:10:10:7     Nonlinear vibration energy harvester using diamagnetic levitation
DOI:10.1063/1.3583675  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Liu, L.;Yuana, F. G.;
7:10:10:8     Fabrication and Characterization of Pb(Zr-0.53,Ti-0.47)O-3-Pb(Nb-1/3,Zn-2/3)O-3 Thin Films on Cantilever Stacks
DOI:10.1007/s11664-010-1407-x  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2011
  TC:3  AU: Fuentes-Fernandez, E.;Debray-Mechtaly, W.;Quevedo-Lopez, M. A.;Gnade, B.;Rajasekaran, A.;Hande, A.;Shah, P.;Alshareef, H. N.;
7:10:11:1     Broadband vibration-based energy harvesting improvement through frequency up-conversion by magnetic excitation
DOI:10.1088/0964-1726/19/6/065020  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:47  AU: Wickenheiser, A. M.;Garcia, E.;
7:10:11:2     A wideband vibration energy harvester based on a folded asymmetric gapped cantilever
DOI:10.1063/1.4863923  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Hu, Yating;Xu, Yong;
7:10:11:3     Power enhancing by reversing mode sequence in tuned mass-spring unit attached vibration energy harvester
DOI:10.1063/1.4813314  JN:AIP ADVANCES  PY:2013
  TC:5  AU: Kim, Jae Eun;Kim, Yoon Young;
7:10:11:4     Experimental Duffing oscillator for broadband piezoelectric energy harvesting
DOI:10.1088/0964-1726/20/10/102001  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:32  AU: Sebald, Gael;Kuwano, Hiroki;Guyomar, Daniel;Ducharne, Benjamin;
7:10:11:5     Piezoelectric energy harvester converting strain energy into kinetic energy for extremely low frequency operation
DOI:10.1063/1.4869130  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kwon, Dae-Sung;Ko, Hee-Jin;Kim, Min-Ook;Oh, Yongkeun;Sim, Jaesam;Lee, Kyounghoon;Cho, Kyung-Ho;Kim, Jongbaeg;
7:10:11:6     A small-form-factor piezoelectric vibration energy harvester using a resonant frequency-down conversion
DOI:10.1063/1.4898662  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Sun, Kyung Ho;Kim, Young-Cheol;Kim, Jae Eun;
7:10:11:7     Plucked piezoelectric bimorphs for knee-joint energy harvesting: modelling and experimental validation
DOI:10.1088/0964-1726/20/5/055007  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:23  AU: Pozzi, Michele;Zhu, Meiling;
7:10:11:8     Bi-stable frequency up-conversion piezoelectric energy harvester driven by non-contact magnetic repulsion
DOI:10.1088/0964-1726/20/12/125011  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:16  AU: Tang, Q. C.;Yang, Y. L.;Li, Xinxin;
7:10:12:1:1     Revisit of series-SSHI with comparisons to other interfacing circuits in piezoelectric energy harvesting
DOI:10.1088/0964-1726/19/12/125009  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:39  AU: Lien, I. C.;Shu, Y. C.;Wu, W. J.;Shiu, S. M.;Lin, H. C.;
7:10:12:1:2     Improving the performance of a piezoelectric energy harvester using a variable thickness beam
DOI:10.1088/0964-1726/19/10/105020  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:18  AU: Paquin, Simon;St-Amant, Yves;
7:10:12:1:3     Analysis of synchronized charge extraction for piezoelectric energy harvesting
DOI:10.1088/0964-1726/20/8/085022  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:20  AU: Tang, Lihua;Yang, Yaowen;
7:10:12:1:4     Analysis of piezoelectric circular diaphragm energy harvesters for use in a pressure fluctuating system
DOI:10.1088/0964-1726/19/2/025016  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:22  AU: Mo, Changki;Radziemski, Leon J.;Clark, William W.;
7:10:12:1:5     Experimental validation of energy harvesting performance for pressure-loaded piezoelectric circular diaphragms
DOI:10.1088/0964-1726/19/7/075010  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:14  AU: Mo, Changki;Radziemski, Leon J.;Clark, William W.;
7:10:12:2:1     Optimization of an electret-based energy harvester
DOI:10.1088/0964-1726/19/7/075015  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:32  AU: Boisseau, S.;Despesse, G.;Sylvestre, A.;
7:10:12:2:2     Ferroelectric dipole electrets for output power enhancement in electrostatic vibration energy harvesters
DOI:10.1063/1.4824831  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Asanuma, Haruhiko;Oguchi, Hiroyuki;Hara, Motoaki;Yoshida, Ryo;Kuwano, Hiroki;
7:10:12:2:3     Transient Charging Behavior of an Energy Harvesting System Using SSHI Interface
DOI:10.1080/10584587.2014.903764  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Fan, Kangqi;Xu, Chunhui;
7:10:12:2:4     Cantilever-based electret energy harvesters
DOI:10.1088/0964-1726/20/10/105013  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:23  AU: Boisseau, S.;Despesse, G.;Ricart, T.;Defay, E.;Sylvestre, A.;
7:10:13:1     Structure-performance relationships for cantilever-type piezoelectric energy harvesters
DOI:10.1063/1.4879876  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Cho, Kyung-Hoon;Park, Hwi-Yeol;Heo, Jin S.;Priya, Shashank;
7:10:13:2     Energy harvester array using piezoelectric circular diaphragm for broadband vibration
DOI:10.1063/1.4878537  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Xiao, Zhao;Yang, Tong Qing;Dong, Ying;Wang, Xiu Cai;
7:10:13:3     Increased piezoelectric energy harvesting from human footstep motion by using an amplification mechanism
DOI:10.1063/1.4897624  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Xie, Longhan;Cai, Mingjing;
7:10:13:4     Micro-fabricated lead zirconate titanate bent cantilever energy harvester with multi-dimensional operation
DOI:10.1063/1.4789754  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:7  AU: Park, J. C.;Khym, S.;Park, J. Y.;
7:10:13:5     Powering a wireless sensor node with a vibration-driven piezoelectric energy harvester
DOI:10.1088/0964-1726/20/12/125006  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:15  AU: Reilly, Elizabeth K.;Burghardt, Fred;Fain, Romy;Wright, Paul;
7:10:13:6     Vibration energy harvesting with a clamped piezoelectric circular diaphragm
DOI:10.1016/j.ceramint.2011.04.099  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:14  AU: Chen, Xu-rui;Yang, Tong-qing;Wang, Wei;Yao, Xi;
7:10:14:1     Piezoelectric films for high frequency ultrasonic transducers in biomedical applications
DOI:10.1016/j.pmatsci.2010.09.001  JN:PROGRESS IN MATERIALS SCIENCE  PY:2011
  TC:50  AU: Zhou, Qifa;Lau, Sienting;Wu, Dawei;Shung, Kirk;
7:10:14:2     Enhanced piezoelectric performance of composite sol-gel thick films evaluated using piezoresponse force microscopy
DOI:10.1063/1.4801975  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Liu, Yuanming;Lam, Kwok Ho;Shung, K. Kirk;Li, Jiangyu;Zhou, Qifa;
7:10:14:3     Lift-Off PMN-PT Thick Film for High-Frequency Ultrasonic Biomicroscopy
DOI:10.1111/j.1551-2916.2010.03873.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Zhu, Benpeng;Han, Jiangxue;Shi, Jing;Shung, Koping Krik;Wei, Qing;Huang, Yuhong;Kosec, Marija;Zhou, Qifa;
7:10:14:4     PMN-PT single crystal thick films on silicon substrate for high-frequency micromachined ultrasonic transducers
DOI:10.1007/s00339-009-5381-1  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:7  AU: Peng, J.;Lau, S. T.;Chao, C.;Dai, J. Y.;Chan, H. L. W.;Luo, H. S.;Zhu, B. P.;Zhou, Q. F.;Shung, K. K.;
7:10:14:5     Silver doped 0.9PMN-PT-0.1PZT composite films for very high frequency ultrasonic transducer applications
DOI:10.1007/s00339-013-7558-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:1  AU: Hsu, Hsiu-Sheng;Benjauthrit, Vatcharee;Wei, Qiang;Huang, Yuhong;Zhou, Qifa;Shung, K. Kirk;
7:10:14:6     Sol-gel derived PMN-PT thick films for high frequency ultrasound linear array applications
DOI:10.1016/j.ceramint.2013.04.054  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Zhu, B. P.;Wu, D. W.;Zhang, Y.;Ou-Yang, J.;Chen, S.;Yang, X. F.;
7:10:15:1     Poisson noise induced switching in driven micromechanical resonators
DOI:10.1103/PhysRevB.86.155420  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Zou, J.;Buvaev, S.;Dykman, M.;Chan, H. B.;
7:10:15:2     The role of excitations statistic and nonlinearity in energy harvesting from random impulsive excitations
DOI:10.1063/1.3647556  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:17  AU: Khovanova, N. A.;Khovanov, I. A.;
7:10:15:3     Concise and high-fidelity predictive criteria for maximizing performance and robustness of bistable energy harvesters
DOI:10.1063/1.4790381  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:18  AU: Harne, R. L.;Thota, M.;Wang, K. W.;
7:10:15:4     Numerical simulations versus theoretical predictions for a non-Gaussian noise induced escape problem in application to full counting statistics
DOI:10.1103/PhysRevB.89.085419  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Khovanov, I. A.;Khovanova, N. A.;
7:10:15:5     Switching Exponent Scaling near Bifurcation Points for Non-Gaussian Noise
DOI:10.1103/PhysRevLett.104.140601  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:6  AU: Billings, Lora;Schwartz, Ira B.;McCrary, Marie;Korotkov, A. N.;Dykman, M. I.;
7:10:16:1     Sensor shape design for piezoelectric cantilever beams to harvest vibration energy
DOI:10.1063/1.3457330  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:27  AU: Friswell, Michael I.;Adhikari, Sondipon;
7:10:16:2     Performance of unimorph cantilever generator using Cr/Nb doped Pb(Zr0.54Ti0.46)O-3 thick film for energy harvesting device applications
DOI:10.1016/j.jeurceramsoc.2012.09.001  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:10  AU: Kim, Kyoung-Bum;Kim, Chang-Il;Jeong, Young Hun;Lee, Young-Jin;Cho, Jeong-Ho;Paik, Jong-Hoo;Nahm, Sahn;
7:10:16:3     Vibration energy harvesting using piezoelectric unimorph cantilevers with unequal piezoelectric and nonpiezoelectric lengths
DOI:10.1063/1.3521389  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Gao, Xiaotong;Shih, Wei-Heng;Shih, Wan Y.;
7:10:16:4     The potential comb improves the efficiency of low-frequency energy harvesting
DOI:10.1063/1.3592189  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Gendelman, B.;Gendelman, O.;Pogreb, R.;Bormashenko, E.;
7:10:16:5     A piezoelectric device for impact energy harvesting
DOI:10.1088/0964-1726/20/10/105008  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:12  AU: Jacquelin, E.;Adhikari, S.;Friswell, M. I.;
7:10:16:6     A geometric parameter study of piezoelectric coverage on a rectangular cantilever energy harvester
DOI:10.1088/0964-1726/20/8/085004  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:7  AU: Patel, R.;McWilliam, S.;Popov, A. A.;
7:10:17:1     A wideband acoustic energy harvester using a three degree-of-freedom architecture
DOI:10.1063/1.4826257  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Peng, Xiao;Wen, Yumei;Li, Ping;Yang, Aichao;Bai, Xiaoling;
7:10:17:2     Nanostructured graphene for energy harvesting
DOI:10.1103/PhysRevB.84.161401  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Lopez-Suarez, Miquel;Rurali, Riccardo;Gammaitoni, Luca;Abadal, Gabriel;
7:10:17:3     Inducing bistability with local electret technology in a microcantilever based non-linear vibration energy harvester
DOI:10.1063/1.4800926  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Lopez-Suarez, M.;Agusti, J.;Torres, F.;Rurali, R.;Abadal, G.;
7:10:17:4     Locally resonant periodic structures with low-frequency band gaps
DOI:10.1063/1.4816052  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Cheng, Zhibao;Shi, Zhifei;Mo, Y. L.;Xiang, Hongjun;
7:10:17:5     Seismic isolation of two dimensional periodic foundations
DOI:10.1063/1.4891837  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Yan, Y.;Laskar, A.;Cheng, Z.;Menq, F.;Tang, Y.;Mo, Y. L.;Shi, Z.;
7:10:17:6     Acoustic energy harvesting by piezoelectric curved beams in the cavity of a sonic crystal
DOI:10.1088/0964-1726/19/4/045016  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:25  AU: Wang, Wei-Chung;Wu, Liang-Yu;Chen, Lien-Wen;Liu, Chia-Ming;
7:10:18:1     Multi-resonant energy harvester exploiting high-mode resonances frequency down-shifted by a flexible body beam
DOI:10.1063/1.4754147  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Seo, Min-Ho;Choi, Dong-Hoon;Kim, In-Ho;Jung, Hyung-Jo;Yoon, Jun-Bo;
7:10:18:2     A Branched Beam-Based Vibration Energy Harvester
DOI:10.1007/s11664-014-3398-5  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Zhang, Guangcheng;Hu, Junhui;
7:10:18:3     Multi-resonant energy harvester exploiting high-mode resonances frequency down-shifted by a flexible body beam (vol 101, 123903, 2012)
DOI:10.1063/1.4759465  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:2  AU: Seo, Min-Ho;Choi, Dong-Hoon;Kim, In-Ho;Jung, Hyung-Jo;Yoon, Jun-Bo;
7:10:18:4     Design of a multiresonant beam for broadband piezoelectric energy harvesting
DOI:10.1088/0964-1726/19/9/094009  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:21  AU: Qi, Shaofan;Shuttleworth, Roger;Oyadiji, S. Olutunde;Wright, Jan;
7:10:18:5     Liquid-based electrostatic energy harvester with high sensitivity to human physical motion
DOI:10.1088/0964-1726/20/12/125012  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:10  AU: Choi, Dong-Hoon;Han, Chang-Hoon;Kim, Hyun-Don;Yoon, Jun-Bo;
7:10:19:1     Resonant manifestation of intrinsic nonlinearity within electroelastic micropower generators
DOI:10.1063/1.3530449  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:20  AU: Stanton, Samuel C.;Erturk, Alper;Mann, Brian P.;Inman, Daniel J.;
7:10:19:2     Nonlinear piezoelectricity in electroelastic energy harvesters: Modeling and experimental identification
DOI:10.1063/1.3486519  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:37  AU: Stanton, Samuel C.;Erturk, Alper;Mann, Brian P.;Inman, Daniel J.;
7:10:19:3     Parametrically excited nonlinear piezoelectric compact wind turbine
DOI:10.1016/j.renene.2012.07.037  JN:RENEWABLE ENERGY  PY:2013
  TC:8  AU: Karami, M. Amin;Farmer, Justin R.;Inman, Daniel J.;
7:10:20:1     Electromagnetic hydrophone with tomographic system for absolute velocity field mapping
DOI:10.1063/1.4726178  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Grasland-Mongrain, Pol;Mari, Jean-Martial;Gilles, Bruno;Chapelon, Jean-Yves;Lafon, Cyril;
7:10:20:2     Tip-sensitive all-silica fiber-optic Fabry-Perot ultrasonic hydrophone for charactering high intensity focused ultrasound fields
DOI:10.1063/1.4816329  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Wang, D. H.;Jia, P. G.;Wang, S. J.;Zhao, C. L.;Zeng, D. P.;Wang, H.;Li, F. Q.;
7:10:20:3     Low frequency driven oscillations of cantilevers in viscous fluids at very low Reynolds number
DOI:10.1063/1.4805072  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Cranch, G. A.;Lane, J. E.;Miller, G. A.;Lou, J. W.;
7:10:20:4     Acoustic characterization of high intensity focused ultrasound fields generated from a transmitter with a large aperture
DOI:10.1063/1.4868597  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Chen, Tao;Fan, Tingbo;Zhang, Wei;Qiu, Yuanyuan;Tu, Juan;Guo, Xiasheng;Zhang, Dong;
7:10:21:1     Energy harvesting: State-of-the-art
DOI:10.1016/j.renene.2010.06.014  JN:RENEWABLE ENERGY  PY:2011
  TC:88  AU: Harb, Adnan;
7:10:21:2     An optimized energy harvester for moving mass induced vibration
DOI:10.1088/0964-1726/20/5/055017  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:0  AU: Bai, Mingsian R.;Tsai, Yao Kun;
7:10:21:3     Piezoelectric Water Drop Energy Harvesting
DOI:10.1007/s11664-013-2826-2  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2014
  TC:0  AU: Al Ahmad, Mahmoud;
7:10:21:4     Design and characterization of an electromagnetic energy harvester for vehicle suspensions
DOI:10.1088/0964-1726/19/4/045003  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:29  AU: Zuo, Lei;Scully, Brian;Shestani, Jurgen;Zhou, Yu;
7:10:22:1     Hybrid rotary-translational vibration energy harvester using cycloidal motion as a mechanical amplifier
DOI:10.1063/1.4861601  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:3  AU: Moss, Scott D.;Hart, Genevieve A.;Burke, Stephen K.;Carman, Gregory P.;
7:10:22:2     Enhancing mechanical energy harvesting with dynamics escaped from potential well
DOI:10.1063/1.3694272  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Ma, T.;Zhang, H.;
7:10:22:3     Reaping the potentials of nonlinear energy harvesting with tunable damping and modulation of the forcing functions
DOI:10.1063/1.4879846  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Ma, T.;Zhang, H.;
7:10:22:4     A tunable rotational energy harvester for low frequency vibration
DOI:10.1063/1.3644130  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:7  AU: Jang, Seon-Jun;Kim, In-Ho;Jung, Hyung-Jo;Lee, Yoon-Pyo;
7:10:23:1     High power density vibration energy harvester with high permeability magnetic material
DOI:10.1063/1.3549607  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Xing, X.;Yang, G. M.;Liu, M.;Lou, J.;Obi, O.;Sun, N. X.;
7:10:23:2     Right-angle piezoelectric cantilever with improved energy harvesting efficiency
DOI:10.1063/1.3374880  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:15  AU: Xu, Jia Wen;Shao, Wei Wei;Kong, Fan Rang;Feng, Zhi Hua;
7:10:23:3     Nanocrystalline ribbons for energy harvesting applications
DOI:10.1063/1.4864437  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Chiriac, H.;Tibu, M.;Lupu, N.;Skorvanek, I.;Ovari, T. -A.;
7:10:24:1     Influence of pulse poling on the piezoelectric property of Pb(Zr-0.52, Ti-0.48)O-3 thin films
DOI:10.1063/1.4901912  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Kobayashi, Takeshi;Suzuki, Yasuhiro;Makimoto, Natsumi;Funakubo, Hiroshi;Maeda, Ryutaro;
7:10:24:2     A digital output piezoelectric accelerometer using a Pb(Zr, Ti)O-3 thin film array electrically connected in series
DOI:10.1088/0964-1726/19/10/105030  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:15  AU: Kobayashi, T.;Okada, H.;Masuda, T.;Maeda, R.;Itoh, T.;
7:10:24:3     A digital output accelerometer using MEMS-based piezoelectric accelerometers and arrayed CMOS inverters with satellite capacitors
DOI:10.1088/0964-1726/20/6/065017  JN:SMART MATERIALS & STRUCTURES  PY:2011
  TC:4  AU: Kobayashi, T.;Okada, H.;Masuda, T.;Maeda, R.;Itoh, T.;
7:11:1:1     Origin of the giant magnetic moment in epitaxial Fe3O4 thin films
DOI:10.1103/PhysRevB.81.144420  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Orna, J.;Algarabel, P. A.;Morellon, L.;Pardo, J. A.;de Teresa, J. M.;Lopez Anton, R.;Bartolome, F.;Garcia, L. M.;Bartolome, J.;Cezar, J. C.;Wildes, A.;
7:11:1:2     Probing One Antiferromagnetic Antiphase Boundary and Single Magnetite Domain Using Nanogap Contacts
DOI:10.1021/nl902973p  JN:NANO LETTERS  PY:2010
  TC:20  AU: Wu, Han-Chun;Abid, Mohamed;Chun, Byong S.;Ramos, Rafael;Mryasov, Oleg N.;Shvets, Igor V.;
7:11:1:3     Spin and orbital moments of nanoscale Fe3O4 epitaxial thin film on MgO/GaAs(100)
DOI:10.1063/1.4871001  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Liu, W. Q.;Xu, Y. B.;Wong, P. K. J.;Maltby, N. J.;Li, S. P.;Wang, X. F.;Du, J.;You, B.;Wu, J.;Bencok, P.;Zhang, R.;
7:11:1:4     Positive antiphase boundary domain wall magnetoresistance in Fe3O4 (110) heteroepitaxial films
DOI:10.1103/PhysRevB.83.134436  JN:PHYSICAL REVIEW B  PY:2011
  TC:14  AU: Sofin, R. G. S.;Arora, S. K.;Shvets, I. V.;
7:11:1:5     Magnetic and transport properties of epitaxial stepped Fe3O4(100) thin films
DOI:10.1063/1.4897001  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Wu, Han-Chun;Syrlybekov, Askar;Mauit, Ozhet;Mouti, Anas;Coileain, Cormac O.;Abid, Mourad;Abid, Mohamed;Shvets, Igor V.;
7:11:1:6     Anomalous magnetization reversal due to proximity effect of antiphase boundaries
DOI:10.1103/PhysRevB.84.212403  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Sofin, R. G. S.;Wu, Han-Chun;Shvets, I. V.;
7:11:1:7     Gate voltage induced phase transition in magnetite nanowires
DOI:10.1063/1.4793529  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Gooth, Johannes;Zierold, Robert;Gluschke, Jan G.;Boehnert, Tim;Edinger, Stefan;Barth, Sven;Nielsch, Kornelius;
7:11:1:8     Verwey transition in Fe3O4 thin films: Influence of oxygen stoichiometry and substrate-induced microstructure
DOI:10.1103/PhysRevB.90.125142  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Liu, X. H.;Rata, A. D.;Chang, C. F.;Komarek, A. C.;Tjeng, L. H.;
7:11:1:9     Transversal magneto-resistance in epitaxial Fe3O4 and Fe3O4/NiO exchange biased system
DOI:10.1063/1.4739951  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:5  AU: Wu, Han-Chun;Ramos, R.;Sofin, R. G. S.;Liao, Zhi-Min;Abid, M.;Shvets, I. V.;
7:11:1:10     Epitaxial growth and magnetic properties of ultrathin iron oxide films on BaTiO3(001)
DOI:10.1063/1.4821259  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Babu, V. Hari;Govind, R. K.;Schindler, K. -M.;Welke, M.;Denecke, R.;
7:11:1:11     Epitaxial growth of gamma-Fe2O3 thin films on MgO substrates by pulsed laser deposition and their properties
DOI:10.1016/j.actamat.2012.10.003  JN:ACTA MATERIALIA  PY:2013
  TC:5  AU: Huang, X. L.;Yang, Y.;Ding, J.;
7:11:1:12     Charge ordering in reactive sputtered (100) and (111) oriented epitaxial Fe3O4 films
DOI:10.1016/j.scriptamat.2013.02.050  JN:SCRIPTA MATERIALIA  PY:2013
  TC:3  AU: Mi, Wenbo;Guo, Zaibing;Wang, Qingxiao;Yang, Yang;Bai, Haili;
7:11:1:13     Thickness Dependence of Fe3O4/MgO Thin Film Properties: Density Functional Theory Investigation
DOI:10.1080/10584587.2014.905408  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Pramchu, Sittichain;Laosiritaworn, Yongyut;
7:11:1:14     Characterization of Fe3O4/GaAs(100) ultrathin films prepared by oxidizing kinetically-stabilized Fe layers
DOI:10.1016/j.tsf.2012.10.092  JN:THIN SOLID FILMS  PY:2012
  TC:1  AU: Lee, Jae-Min;Cho, Deok-Yong;Kim, Yongsam;Noh, D. Y.;Park, B. -G.;Kim, J. -Y.;Oh, S. -J.;
7:11:1:15     Lattice template effect on epitaxial gamma-Fe2O3 films prepared by metal organic deposition
DOI:10.1063/1.3309770  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Manago, Takashi;Sonobe, Tomoyuki;Yamaguchi, Iwao;Takano, Fumiyoshi;
7:11:2:1     Structural transformation in magnetite below the Verwey transition
DOI:10.1103/PhysRevB.83.104105  JN:PHYSICAL REVIEW B  PY:2011
  TC:30  AU: Blasco, Javier;Garcia, Joaquin;Subias, Gloria;
7:11:2:2     First-principles determination of charge and orbital interactions in Fe3O4
DOI:10.1103/PhysRevB.81.205113  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Zhou, Fei;Ceder, Gerbrand;
7:11:2:3     Symmetry of Orbital Order in Fe3O4 Studied by Fe L-2,L-3 Resonant X-Ray Diffraction
DOI:10.1103/PhysRevLett.108.227203  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:9  AU: Tanaka, A.;Chang, C. F.;Buchholz, M.;Trabant, C.;Schierle, E.;Schlappa, J.;Schmitz, D.;Ott, H.;Metcalf, P.;Tjeng, L. H.;Schuessler-Langeheine, C.;
7:11:2:4     Electronic orders in the Verwey structure of magnetite
DOI:10.1103/PhysRevB.85.125119  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Senn, Mark S.;Loa, Ingo;Wright, Jon P.;Attfield, J. Paul;
7:11:2:5     Analysis of charge and orbital order in Fe3O4 by Fe L-2,L-3 resonant x-ray diffraction
DOI:10.1103/PhysRevB.88.195110  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Tanaka, A.;Chang, C. F.;Buchholz, M.;Trabant, C.;Schierle, E.;Schlappa, J.;Schmitz, D.;Ott, H.;Metcalf, P.;Tjeng, L. H.;Schuessler-Langeheine, C.;
7:11:2:6     Hybrid DFT calculation of Fe-57 NMR resonances and orbital order in magnetite
DOI:10.1103/PhysRevB.90.075134  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Patterson, C. H.;
7:11:2:7     Time-resolved resonant soft x-ray diffraction with free-electron lasers: Femtosecond dynamics across the Verwey transition in magnetite
DOI:10.1063/1.3584855  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:14  AU: Pontius, N.;Kachel, T.;Schuessler-Langeheine, C.;Schlotter, W. F.;Beye, M.;Sorgenfrei, F.;Chang, C. F.;Foehlisch, A.;Wurth, W.;Metcalf, P.;Leonov, I.;Yaresko, A.;Stojanovic, N.;Berglund, M.;Guerassimova, N.;Duesterer, S.;Redlin, H.;Duerr, H. A.;
7:11:2:8     Anharmonicity due to Electron-Phonon Coupling in Magnetite
DOI:10.1103/PhysRevLett.110.207204  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Hoesch, Moritz;Piekarz, Przemyslaw;Bosak, Alexey;Le Tacon, Mathieu;Krisch, Michael;Kozlowski, Andrzej;Oles, Andrzej M.;Parlinski, Krzysztof;
7:11:2:9     Size Dependence of Metal-Insulator Transition in Stoichiometric Fe3O4 Nanocrystals
DOI:10.1021/acs.nanolett.5b00331  JN:NANO LETTERS  PY:2015
  TC:0  AU: Lee, Jisoo;Kwon, Soon Gu;Park, Je-Geun;Hyeon, Taeghwan;
7:11:2:10     Speed limit of the insulator-metal transition in magnetite
DOI:10.1038/NMAT3718  JN:NATURE MATERIALS  PY:2013
  TC:19  AU: de Jong, S.;Kukreja, R.;Trabant, C.;Pontius, N.;Chang, C. F.;Kachel, T.;Beye, M.;Sorgenfrei, F.;Back, C. H.;Braeuer, B.;Schlotter, W. F.;Turner, J. J.;Krupin, O.;Doehler, M.;Zhu, D.;Hossain, M. A.;Scherz, A. O.;Fausti, D.;Novelli, F.;Esposito, M.;Lee, W. S.;Chuang, Y. D.;Lu, D. H.;Moore, R. G.;Yi, M.;Trigo, M.;Kirchmann, P.;Pathey, L.;Golden, M. S.;Buchholz, M.;Metcalf, P.;Parmigiani, F.;Wurth, W.;Foehlisch, A.;Schuessler-Langeheine, C.;Duerr, H. A.;
7:11:2:11     Nuclear inelastic scattering studies of lattice dynamics in magnetite with a first- and second-order Verwey transition
DOI:10.1103/PhysRevB.85.104301  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Kolodziej, Tomasz;Kozlowski, Andrzej;Piekarz, Przemyslaw;Tabis, Wojciech;Kakol, Zbigniew;Zajac, Marcin;Tarnawski, Zbigniew;Honig, Juergen M.;Oles, Andrzej M.;Parlinski, Krzysztof;
7:11:2:12     Direct Observation of Charge Ordering in Magnetite Using Resonant Multiwave X-Ray Diffraction
DOI:10.1103/PhysRevLett.108.146404  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: Weng, Shih-Chang;Lee, Yen-Ru;Chen, Cheng-Gang;Chu, Chia-Hung;Soo, Yun-Liang;Chang, Shih-Lin;
7:11:2:13     Comment on "Direct Observation of Charge Ordering in Magnetite Using Resonant Multiwave X-Ray Diffraction"
DOI:10.1103/PhysRevLett.109.049701  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:1  AU: Garcia, Joaquin;Subias, Gloria;
7:11:2:14     Intrinsic and extrinsic x-ray absorption effects in soft x-ray diffraction from the superstructure in magnetite
DOI:10.1103/PhysRevB.83.073105  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Chang, C. F.;Schlappa, J.;Buchholz, M.;Tanaka, A.;Schierle, E.;Schmitz, D.;Ott, H.;Sutarto, R.;Willers, T.;Metcalf, P.;Tjeng, L. H.;Schuessler-Langeheine, C.;
7:11:2:15     Molecular dynamics potentials in magnetite (Fe3O4) modeling
DOI:10.1016/j.commatsci.2011.06.007  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2011
  TC:2  AU: Soontrapa, C.;Chen, Y.;
7:11:2:16     Symmetry of Orbital Order in Fe3O4 Studied by Fe L-2,L-3 Resonant X-Ray Diffraction (vol 108, 227203, 2012)
DOI:10.1103/PhysRevLett.109.119901  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:0  AU: Tanaka, A.;Chang, C. F.;Buchholz, M.;Trabant, C.;Schierle, E.;Schlappa, J.;Schmitz, D.;Ott, H.;Metcalf, P.;Tjeng, L. H.;Schuessler-Langeheine, C.;
7:11:2:17     Nanoparticle Assemblies as Memristors (vol 9, pg 2229, 2009)
DOI:10.1021/nl101926w  JN:NANO LETTERS  PY:2010
  TC:1  AU: Kim, Tae Hee;Jang, Eun Young;Lee, Nyun Jong;Choi, Deung Jang;Lee, Kyung-Jin;Jang, Jung-tak;Choi, Jin-sil;Moon, Seung Ho;Cheon, Jinwoo;
7:11:3:1     Semiconductor-half metal transition at the Fe3O4(001) surface upon hydrogen adsorption
DOI:10.1103/PhysRevB.82.125413  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Parkinson, Gareth S.;Mulakaluri, Narasimham;Losovyj, Yaroslav;Jacobson, Peter;Pentcheva, Rossitza;Diebold, Ulrike;
7:11:3:2     Antiphase domain boundaries at the Fe3O4(001) surface
DOI:10.1103/PhysRevB.85.195450  JN:PHYSICAL REVIEW B  PY:2012
  TC:11  AU: Parkinson, Gareth S.;Manz, Thomas A.;Novotny, Zbynek;Sprunger, Phillip T.;Kurtz, Richard L.;Schmid, Michael;Sholl, David S.;Diebold, Ulrike;
7:11:3:3     Probing the surface phase diagram of Fe3O4(001) towards the Fe-rich limit: Evidence for progressive reduction of the surface
DOI:10.1103/PhysRevB.87.195410  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Novotny, Zbynek;Mulakaluri, Narasimham;Edes, Zoltan;Schmid, Michael;Pentcheva, Rossitza;Diebold, Ulrike;Parkinson, Gareth S.;
7:11:3:4     Room Temperature Water Splitting at the Surface of Magnetite
DOI:10.1021/ja203432e  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:27  AU: Parkinson, Gareth S.;Novotny, Zbynek;Jacobson, Peter;Schmid, Michael;Diebold, Ulrike;
7:11:3:5     Cluster Nucleation and Growth from a Highly Supersaturated Adatom Phase: Silver on Magnetite
DOI:10.1021/nn502895s  JN:ACS NANO  PY:2014
  TC:3  AU: Bliem, Roland;Kosak, Rukan;Perneczky, Lukas;Novotny, Zbynek;Gamba, Oscar;Fobes, David;Mao, Zhiqiang;Schmid, Michael;Blaha, Peter;Diebold, Ulrike;Parkinson, Gareth S.;
7:11:3:6     Ordered Array of Single Adatoms with Remarkable Thermal Stability: Au/Fe3O4(001)
DOI:10.1103/PhysRevLett.108.216103  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:15  AU: Novotny, Zbynek;Argentero, Giacomo;Wang, Zhiming;Schmid, Michael;Diebold, Ulrike;Parkinson, Gareth S.;
7:11:3:7     Direct observation of a positive spin polarization at the (111) surface of magnetite
DOI:10.1103/PhysRevB.85.180409  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Pratt, A.;Kurahashi, M.;Sun, X.;Gilks, D.;Yamauchi, Y.;
7:11:3:8     Carbon monoxide-induced adatom sintering in a Pd-Fe3O4 model catalyst
DOI:10.1038/NMAT3667  JN:NATURE MATERIALS  PY:2013
  TC:30  AU: Parkinson, Gareth S.;Novotny, Zbynek;Argentero, Giacomo;Schmid, Michael;Pavelec, Jiri;Kosak, Rukan;Blaha, Peter;Diebold, Ulrike;
7:11:3:9     Insight into Magnetite's Redox Catalysis from Observing Surface Morphology during Oxidation
DOI:10.1021/ja402599t  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2013
  TC:8  AU: Nie, Shu;Starodub, Elena;Monti, Matteo;Siegel, David A.;Vergara, Lucia;El Gabaly, Farid;Bartelt, Norman C.;de la Figuera, Juan;McCarty, Kevin F.;
7:11:3:10     Real-space imaging of the Verwey transition at the (100) surface of magnetite
DOI:10.1103/PhysRevB.88.161410  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: de la Figuera, Juan;Novotny, Zbynek;Setvin, Martin;Liu, Tijiang;Mao, Zhiqiang;Chen, Gong;N'Diaye, Alpha T.;Schmid, Michael;Diebold, Ulrike;Schmid, Andreas K.;Parkinson, Gareth S.;
7:11:3:11     Termination and Verwey transition of the (111) surface of magnetite studied by scanning tunneling microscopy and first-principles calculations
DOI:10.1103/PhysRevB.81.235429  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Shimizu, Tomoko K.;Jung, Jaehoon;Kato, Hiroyuki S.;Kim, Yousoo;Kawai, Maki;
7:11:3:12     Recovery of the half-metallicity of an Fe3O4(100) surface by atomic hydrogen adsorption
DOI:10.1103/PhysRevB.81.193402  JN:PHYSICAL REVIEW B  PY:2010
  TC:16  AU: Kurahashi, M.;Sun, X.;Yamauchi, Y.;
7:11:3:13     Probing the surface phase diagram of Fe3O4(001) towards the Fe-rich limit: Evidence for progressive reduction of the surface (vol 87, 195410, 2013)
DOI:10.1103/PhysRevB.88.039902  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Novotny, Zbynek;Mulakaluri, Narasimham;Edes, Zoltan;Schmid, Michael;Pentcheva, Rossitza;Diebold, Ulrike;Parkinson, Gareth S.;
7:11:3:14     Surface properties of the clean and Au/Pd covered Fe3O4(111): DFT and DFT+U study
DOI:10.1103/PhysRevB.85.125414  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Kiejna, Adam;Ossowski, Tomasz;Pabisiak, Tomasz;
7:11:3:15     Atomically resolved nucleation and initial growth of a Ag three-dimensional island on Si(001) substrate
DOI:10.1103/PhysRevB.83.205433  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Takeuchi, Osamu;Kageshima, Masami;Sakama, Hiroshi;Kawazu, Akira;
7:11:3:16     Order-disorder phase transition on the (100) surface of magnetite
DOI:10.1103/PhysRevB.88.235436  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;
7:11:3:17     Tuning Ag/Si(100) island size, shape, and density
DOI:10.1063/1.4824744  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Kong, Dexin;Drucker, Jeff;
7:11:4:1     Three dimensional nano-seeding assembly of ferromagnetic Fe/LaSrFeO4 nano-hetero dot array
DOI:10.1063/1.4739719  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Okada, K.;Sakamoto, T.;Fujiwara, K.;Hattori, A. N.;Kanki, T.;Tanaka, H.;
7:11:4:2     Epitaxial inversion on ferromagnetic (Fe,Zn)(3)O-4/ferroelectric BiFeO3 core-shell nanodot arrays using three dimensional nano-seeding assembly
DOI:10.1063/1.4794810  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Sakamoto, Takuya;Okada, Koichi;Hattori, Azusa N.;Kanki, Teruo;Borowiak, Alexis S.;Gautier, Brice;Vilquin, Bertrand;Tanaka, Hidekazu;
7:11:4:3     Direct fabrication of integrated 3D epitaxial functional transition metal oxide nanostructures using extremely small hollow nanopillar nano-imprint metal masks
DOI:10.1088/0957-4484/22/18/185306  JN:NANOTECHNOLOGY  PY:2011
  TC:10  AU: Cha, Nam-Goo;Kanki, Teruo;Tanaka, Hidekazu;
7:11:4:4     Revealing magnetic domain structure in functional Fe2.5Zn0.5O4 wires by transmission electron microscopy
DOI:10.1016/j.actamat.2013.10.015  JN:ACTA MATERIALIA  PY:2014
  TC:4  AU: Murakami, Y.;Ohta, A.;Hattori, A. N.;Kanki, T.;Aizawa, S.;Tanigaki, T.;Park, H. S.;Tanaka, H.;Shindo, D.;
7:11:4:5     Position-controlled functional oxide lateral heterostructures consisting of artificially aligned (Fe, Zn)(3)O-4 nanodots and BiFeO3 matrix
DOI:10.1088/0957-4484/23/33/335302  JN:NANOTECHNOLOGY  PY:2012
  TC:5  AU: Sakamoto, Takuya;Okada, Koichi;Hattori, Azusa N.;Kanki, Teruo;Tanaka, Hidekazu;
7:11:4:6     Giant Magnetoresistance Observed in (Fe,Mn)(3)O-4 Artificial Nanoconstrained Structures at Room Temperature
DOI:10.1021/nl100542a  JN:NANO LETTERS  PY:2010
  TC:10  AU: Goto, Kazuya;Kanki, Teruo;Kawai, Tomoji;Tanaka, Hidekazu;
7:11:4:7     Enhancement of Spin Polarization in a Transition Metal Oxide Ferromagnetic Nanodot Diode
DOI:10.1021/nl102601m  JN:NANO LETTERS  PY:2011
  TC:8  AU: Yamanaka, Satoru;Kanki, Teruo;Kawai, Tomoji;Tanaka, Hidekazu;
7:11:4:8     Preparation of ferroelectric field effect transistor based on sustainable strongly correlated (Fe,Zn)(3)O-4 oxide semiconductor and their electrical transport properties
DOI:10.1063/1.3564885  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Takaobushi, Junichi;Kanki, Teruo;Kawai, Tomoji;Tanaka, Hidekazu;
7:11:5:1     Vibrational Spectroscopic Characterization of Hematite, Maghemite, and Magnetite Thin Films Produced by Vapor Deposition
DOI:10.1021/am1004943  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2010
  TC:108  AU: Jubb, Aaron M.;Allen, Heather C.;
7:11:5:2     Reflectance anisotropy spectroscopy of magnetite (110) surfaces
DOI:10.1103/PhysRevB.89.195118  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Fleischer, K.;Verre, R.;Mauit, O.;Sofin, R. G. S.;Farrell, L.;Byrne, C.;Smith, C. M.;McGilp, J. F.;Shvets, I. V.;
7:11:5:3     Low temperature oxidation mechanisms of nanocrystalline magnetite thin film
DOI:10.1063/1.4772714  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:10  AU: Bourgeois, F.;Gergaud, P.;Renevier, H.;Leclere, C.;Feuillet, G.;
7:11:5:4     Increasing the Efficiency of Single Walled Carbon Nanotube Amplification by Fe-Co Catalysts Through the Optimization of CH4/H-2 Partial Pressures
DOI:10.1021/nl201315j  JN:NANO LETTERS  PY:2011
  TC:11  AU: Orbaek, Alvin W.;Owens, Andrew C.;Barron, Andrew R.;
7:11:5:5     Stability and capping of magnetite ultra-thin films
DOI:10.1063/1.4876059  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:2  AU: Fleischer, K.;Mauit, O.;Shvets, I. V.;
7:11:5:6     The development of a 'process map' for the growth of carbon nanomaterials from ferrocene by injection CVD
DOI:10.1039/c3ta13543h  JN:JOURNAL OF MATERIALS CHEMISTRY A  PY:2013
  TC:2  AU: Orbaek, Alvin W.;Aggarwal, Neerja;Barron, Andrew R.;
7:11:5:7     Organics Exposure in Orbit (OREOcube): A Next-Generation Space Exposure Platform
DOI:10.1021/la501203g  JN:LANGMUIR  PY:2014
  TC:0  AU: Elsaesser, Andreas;Quinn, Richard C.;Ehrenfreund, Pascale;Mattioda, Andrew L.;Ricco, Antonio J.;Alonzo, Jason;Breitenbach, Alex;Chan, Yee Kim;Fresneau, Aurelien;Salama, Farid;Santos, Orlando;
7:11:6:1     Supercritical fluid technology: A reliable process for high quality BaTiO3 based nanomaterials
DOI:10.1016/j.apt.2014.02.016  JN:ADVANCED POWDER TECHNOLOGY  PY:2014
  TC:4  AU: Philippot, Gilles;Elissalde, Catherine;Maglione, Mario;Aymonier, Cyril;
7:11:6:2     Continuous supercritical hydrothermal synthesis of iron oxide nanoparticle dispersions and their characterization
DOI:10.1007/s11051-014-2350-1  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2014
  TC:0  AU: de Tercero, M. Daschner;Roeder, C.;Fehrenbacher, U.;Teipel, U.;Tuerk, M.;
7:11:6:3     Hydrothermal synthesis of organic hybrid BaTiO3 nanoparticles using a supercritical continuous flow reaction system
DOI:10.1016/j.jcrysgro.2010.09.042  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:11  AU: Hayashi, Hiromichi;Noguchi, Takio;Islam, Nazrul M.;Hakuta, Yukiya;Imai, Yusuke;Ueno, Nobuhiko;
7:11:6:4     Hydrothermal synthesis of BaTiO3 nanoparticles using a supercritical continuous flow reaction system
DOI:10.1016/j.jcrysgro.2010.03.034  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:13  AU: Hayashi, Hiromichi;Noguchi, Takio;Islam, Nazrul M.;Hakuta, Yukiya;Imai, Yusuke;Ueno, Nobuhiko;
7:11:6:5     Continuous supercritical synthesis of high quality UV-emitting ZnO nanocrystals for optochemical applications
DOI:10.1039/c3tc30737a  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:7  AU: Ilin, Evgeniy S.;Marre, Samuel;Jubera, Veronique;Aymonier, Cyril;
7:11:6:6     High- Rate Continuous Synthesis of Nanocrystalline Perovskites and Metal Oxides in a Colliding Vapor Stream of Microdroplets
DOI:10.1002/adfm.201301916  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:0  AU: Ould-Ely, Teyeb;Kaplan-Reinig, Lyle;Morse, Daniel E.;
7:11:6:7     Crystal growth and magnetic properties of the double perovskites R2MnNiO6 (R=Pr, Sm and Ho) by a hydrothermal route
DOI:10.1016/j.jcrysgro.2011.06.002  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:2  AU: Zhang, Ganghua;Li, Guobao;Liao, Fuhui;Fu, Yin;Xiong, Ming;Lin, Jianhua;
7:11:6:8     Atomistic Field Theory of Nano Energy Harvesting
DOI:10.1166/jctn.2011.1744  JN:JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE  PY:2011
  TC:2  AU: Chen, James;
7:11:7:1     Exchange bias effects in epitaxial Fe3O4/BiFeO3 heterostructures
DOI:10.1063/1.4729408  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:19  AU: Qu, T. L.;Zhao, Y. G.;Yu, P.;Zhao, H. C.;Zhang, S.;Yang, L. F.;
7:11:7:2     Electronic and magnetic structure at the Fe/Fe3O4 interface
DOI:10.1103/PhysRevB.84.104407  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Kida, T.;Honda, S.;Itoh, H.;Inoue, J.;Yanagihara, H.;Kita, E.;Mibu, K.;
7:11:7:3     Coexistence of strong ferromagnetism and polar switching at room temperature in Fe3O4-BiFeO3 nanocomposite thin films
DOI:10.1063/1.3500826  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:11  AU: Weal, E.;Patnaik, S.;Bi, Z.;Wang, H.;Fix, T.;Kursumovic, A.;Driscoll, J. L. MacManus;
7:11:7:4     Electronic and magnetic structure of Fe3O4/BiFeO3 multiferroic superlattices: First principles calculations
DOI:10.1063/1.4755805  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Yang, H.;Jin, C.;Mi, W. B.;Bai, H. L.;Chen, G. F.;
7:11:7:5     Generation of BiFeO3-Fe3O4 Janus particles based on droplet microfluidic method
DOI:10.1063/1.4891955  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Shasha;Yu, Xiaolei;You, Sujian;Cai, Bo;Liu, Chang;Liu, Huiqin;Liu, Wei;Guo, Shi-Shang;Zhao, Xing-Zhong;
7:11:7:6     Magnetic and electronic properties of Fe3O4/graphene heterostructures: First principles perspective
DOI:10.1063/1.4793590  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Mi, Wenbo;Yang, Hua;Cheng, Yingchun;Chen, Guifeng;Bai, Haili;
7:11:7:7     Transport and magnetic properties of Bi2Fe4O9-Fe3O4 nanocomposite films grown on LaAlO3 (100) substrates by molecular beam epitaxy
DOI:10.1016/j.matlet.2013.03.008  JN:MATERIALS LETTERS  PY:2013
  TC:1  AU: Tuan Anh Duong;Tran Viet Cuong;Shin, Yooleemi;Cho, Sunglae;
7:11:8:1     Pyroelectric detection of spontaneous polarization in magnetite thin films
DOI:10.1103/PhysRevB.86.144105  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Takahashi, R.;Misumi, H.;Lippmaa, M.;
7:11:8:2     Tuning of multiferroic orders correlated to oxygen stoichiometry in magnetite films
DOI:10.1063/1.4897629  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Dey, K.;Ghosh, A.;Modak, P.;Indra, A.;Majumdar, S.;Giri, S.;
7:11:8:3     Relaxor ferroelectricity and the freezing of short-range polar order in magnetite
DOI:10.1103/PhysRevB.83.195109  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Schrettle, F.;Krohns, S.;Lunkenheimer, P.;Brabers, V. A. M.;Loidl, A.;
7:11:8:4     Sub-bandgap photocurrent effects on dynamic pyroelectric measurement in Pt/PbTiO3/Nb:SrTiO3 heterostructures
DOI:10.1063/1.4736262  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Takahashi, R.;Tybell, T.;Lippmaa, M.;
7:11:9:1     Terahertz spectroscopy of low-energy excitations in charge-ordered La0.25Ca0.75MnO3
DOI:10.1103/PhysRevB.81.125132  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Zhang, T.;Zhukova, E.;Gorshunov, B.;Wu, D.;Prokhorov, A. S.;Torgashev, V. I.;Maksimov, E. G.;Dressel, M.;
7:11:9:2     Optical investigation of the collective dynamics of charge-orbital density waves in layered manganites
DOI:10.1103/PhysRevB.82.140409  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Fujioka, J.;Ida, Y.;Takahashi, Y.;Kida, N.;Shimano, R.;Tokura, Y.;
7:11:9:3     Boson peak in overdoped manganites La1-xCaxMnO3
DOI:10.1103/PhysRevB.87.245124  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Gorshunov, B.;Zhukova, E.;Torgashev, V. I.;Kadyrov, L. S.;Motovilova, E. A.;Fischgrabe, F.;Moshnyaga, V.;Zhang, T.;Kremer, R.;Pracht, U.;Zapf, S.;Dressel, M.;
7:11:9:4     Charge density waves condensate as measure of charge order and disorder in Eu1-xSrxMnO3 (x=0.50, 0.58) manganites
DOI:10.1063/1.3680094  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:4  AU: Pandey, Parul;Awari, Nilesh;Rana, Rakesh;Singh, Abhishek;Prabhu, S. S.;Rana, D. S.;
7:11:9:5     Anisotropy-induced crossover from Drude conductivity to charge-density-wave excitations in a stripe-type charge-ordered manganite
DOI:10.1103/PhysRevB.87.224421  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Rana, Rakesh;Pandey, Parul;Rana, D. S.;Mavani, K. R.;Kawayama, I.;Murakami, H.;Tonouchi, M.;
7:11:9:6     Charge density wave excitations in stripe-type charge ordered Pr0.5Sr0.5MnO3 manganite
DOI:10.1063/1.4772474  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Rana, Rakesh;Rana, D. S.;Mavani, K. R.;Kawayama, I.;Murakami, H.;Tonouchi, M.;
7:11:9:7     Conductance fluctuations in metal-nanoparticle-metal junctions
DOI:10.1103/PhysRevB.82.155437  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Govor, L. V.;Bauer, G. H.;Reiter, G.;Parisi, J.;
7:11:10:1     Tailoring interlayer exchange coupling of ferromagnetic films across MgO with Fe nanoclusters
DOI:10.1103/PhysRevB.81.094406  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Wong, Jared J. I.;Ramirez, Luciana;Swartz, A. G.;Hoff, A.;Han, Wei;Li, Yan;Kawakami, R. K.;
7:11:10:2     Spatial Fluctuations of Loose Spin Coupling in CuMn/Co Multilayers
DOI:10.1103/PhysRevLett.107.127201  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:7  AU: Saerbeck, T.;Loh, N.;Lott, D.;Toperverg, B. P.;Mulders, A. M.;Fraile Rodriguez, A.;Freeland, J. W.;Ali, M.;Hickey, B. J.;Stampfl, A. P. J.;Klose, F.;Stamps, R. L.;
7:11:10:3     Electric field control of the Verwey transition and induced magnetoelectric effect in magnetite
DOI:10.1103/PhysRevB.86.060409  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Wong, Jared J. I.;Swartz, Adrian G.;Zheng, Renjing;Han, Wei;Kawakami, Roland K.;
7:11:10:4     Oscillatory Spin Polarization and Magneto-Optical Kerr Effect in Fe3O4 Thin Films on GaAs(001)
DOI:10.1103/PhysRevLett.105.167203  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:5  AU: Li, Yan;Han, Wei;Swartz, A. G.;Pi, K.;Wong, J. J. I.;Mack, S.;Awschalom, D. D.;Kawakami, R. K.;
7:11:10:5     Specular and off-specular polarized neutron reflectometry of canted magnetic domains in loose spin coupled CuMn/Co multilayers
DOI:10.1103/PhysRevB.85.014411  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Saerbeck, T.;Loh, N.;Lott, D.;Toperverg, B. P.;Mulders, A. M.;Ali, M.;Hickey, B. J.;Stampfl, A. P. J.;Klose, F.;Stamps, R. L.;
7:11:11:1     Chemical ordering dependence of interlayer exchange coupling in Co-Mn-Si/Cr/Co-Mn-Si trilayer structures
DOI:10.1103/PhysRevB.81.054426  JN:PHYSICAL REVIEW B  PY:2010
  TC:12  AU: Bosu, S.;Sakuraba, Y.;Saito, K.;Wang, H.;Mitani, S.;Takanashi, K.;
7:11:11:2     Ab initio study of magnetic structure and exchange coupling in Co2MnSi/Cr/Co2MnSi trilayers
DOI:10.1103/PhysRevB.82.014413  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Kakeno, W.;Honda, S.;Itoh, H.;Inoue, J.;
7:11:11:3     Spacer layer thickness dependence of exchange coupling in Co-enriched Co-Mn-Si/Cr/Co-Mn-Si epitaxial trilayers
DOI:10.1063/1.3663362  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Bosu, S.;Sakuraba, Y.;Saito, K.;Wang, H.;Takanashi, K.;
7:11:11:4     Effect of chemical ordering on 90 degrees interlayer coupling in epitaxial Co-Fe/Cr/Co-Fe thin films
DOI:10.1016/j.jmmm.2014.06.044  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Bosu, S.;Sakuraba, Y.;Saito, K.;Izumi, K.;Koganezawa, T.;Takanashi, K.;
7:11:11:5     Structure determination of thin CoFe films by anomalous x-ray diffraction
DOI:10.1063/1.4755801  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Gloskovskii, Andrei;Stryganyuk, Gregory;Ouardi, Siham;Fecher, Gerhard H.;Felser, Claudia;Hamrle, Jaroslav;Pistora, Jaromir;Bosu, Subrojati;Saito, Kesami;Sakuraba, Yuya;Takanashi, Koki;
7:11:11:6     Effects of magnetic seed-layers on the structural and magnetic properties of Co2MnSi Heusler alloy
DOI:10.1016/j.matchemphys.2012.07.029  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:0  AU: Bae, Taejin;Lee, Sangho;Hong, Jongill;Lee, Dong Ryeol;Roh, Jaesung;
7:11:12:1     Synthesis of multiferroic Er-Fe-O thin films by atomic layer and chemical vapor deposition
DOI:10.1063/1.4865774  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Mantovan, R.;Vangelista, S.;Wiemer, C.;Lamperti, A.;Tallarida, G.;Chikoidze, E.;Dumont, Y.;Fanciulli, M.;
7:11:12:2     Synthesis of magnetic tunnel junctions with full in situ atomic layer and chemical vapor deposition processes
DOI:10.1016/j.tsf.2011.08.037  JN:THIN SOLID FILMS  PY:2012
  TC:9  AU: Mantovan, R.;Vangelista, S.;Kutrzeba-Kotowska, B.;Cocco, S.;Lamperti, A.;Tallarida, G.;Mameli, D.;Fanciulli, M.;
7:11:12:3     Chemical vapor deposition growth of Fe3O4 thin films and Fe/Fe3O4 bi-layers for their integration in magnetic tunnel junctions
DOI:10.1016/j.tsf.2011.10.128  JN:THIN SOLID FILMS  PY:2012
  TC:10  AU: Vangelista, S.;Mantovan, R.;Cocco, S.;Lamperti, A.;Salicio, O.;Fanciulli, M.;
7:11:12:4     Magnetic and magnetodielectric properties of erbium iron garnet ceramic
DOI:10.1063/1.4776716  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Maignan, A.;Singh, K.;Simon, Ch;Lebedev, O. I.;Martin, C.;Tan, H.;Verbeeck, J.;Van Tendeloo, G.;
7:11:12:5     Investigation of atomic layer deposition of magnesium oxide on a CoFeB layer for three-dimensional magnetic tunneling junctions
DOI:10.1016/j.jallcom.2013.11.227  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Song, Jeong-Gyu;Park, Jusang;Yoon, Jaehong;Kim, Keewon;Jang, Youngman;Kim, Kwangseok;Kim, Hyungjun;
7:11:12:6     Chemical vapor deposition of polycrystalline Fe3O4 thin films by using the cyclohexadiene iron tricarbonyl liquid precursor
DOI:10.1063/1.3683082  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Mantovan, R.;Vangelista, S.;Cocco, S.;Lamperti, A.;Salicio, O.;
7:11:12:7     Origin of enhanced magnetization in rare earth doped multiferroic bismuth ferrite
DOI:10.1063/1.4865958  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Nayek, C.;Tamilselvan, A.;Thirmal, Ch;Murugavel, P.;Balakumar, S.;
7:11:13:1     Anomalous magnetic properties of the epitaxial CoFe2O4 films prepared by reactive cosputtering
DOI:10.1063/1.3608041  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Jin, C.;Liu, H.;Li, P.;Kuang, D. F.;Bai, H. L.;
7:11:13:2     Electronic structure near an antiphase boundary in magnetite
DOI:10.1103/PhysRevB.81.104422  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Arras, R.;Calmels, L.;Warot-Fonrose, B.;
7:11:13:3     Experimental and first-principles study on the magnetic and transport properties of Ti-doped Fe3O4 epitaxial films
DOI:10.1063/1.3650252  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Jin, C.;Mi, W. B.;Li, P.;Bai, H. L.;
7:11:13:4     On the optical properties and low pressure-induced spin transition in magnetite from ab initio calculations
DOI:10.1016/j.jmmm.2012.12.026  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Siberchicot, Bruno;
7:11:13:5     Investigation of the interfacial structure and transport properties of Fe3O4-SrTiO3 composite films
DOI:10.1016/j.apsusc.2013.09.068  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:0  AU: Jin, C.;Zheng, D. X.;Li, P.;Mi, W. B.;Bai, H. L.;
7:11:14:1     Position-, size-, and shape-controlled highly crystalline ZnO nanostructures
DOI:10.1088/0957-4484/22/41/415301  JN:NANOTECHNOLOGY  PY:2011
  TC:14  AU: Hattori, Azusa N.;Ono, Atsushi;Tanaka, Hidekazu;
7:11:14:2     Controlled fabrication of artificial ferromagnetic (Fe, Mn)(3)O-4 nanowall-wires by a three-dimensional nanotemplate pulsed laser deposition method
DOI:10.1088/0957-4484/23/48/485308  JN:NANOTECHNOLOGY  PY:2012
  TC:6  AU: Kushizaki, Takayoshi;Fujiwara, Kohei;Hattori, Azusa N.;Kanki, Teruo;Tanaka, Hidekazu;
7:11:14:3     Colossal magnetoresistive (La,Pr,Ca)MnO3 nanobox array structures constructed by the three-dimensional nanotemplate pulsed laser deposition technique
DOI:10.1063/1.4834876  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Nguyen, T. V. A.;Hattori, A. N.;Fujiwara, Y.;Ueda, S.;Tanaka, H.;
7:11:14:4     Identification of Giant Mott Phase Transition of Single Electric Nanodomain in Manganite Nanowall Wire
DOI:10.1021/acs.nanolett.5b00264  JN:NANO LETTERS  PY:2015
  TC:1  AU: Hattori, Azusa N.;Fujiwara, Yasushi;Fujiwara, Kohei;Thi Van Anh Nguyen;Nakamura, Takuro;Ichimiya, Masayoshi;Ashida, Masaaki;Tanaka, Hidekazu;
7:11:14:5     Estimation of dc transport dynamics in strongly correlated (La,Pr,Ca)MnO3 film using an insulator-metal composite model for terahertz conductivity
DOI:10.1063/1.4890109  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Nguyen, T. V. A.;Hattori, A. N.;Nagai, M.;Nakamura, T.;Fujiwara, K.;Ashida, M.;Tanaka, H.;
7:11:15:1     Magnetism in nanometer-thick magnetite
DOI:10.1103/PhysRevB.85.020404  JN:PHYSICAL REVIEW B  PY:2012
  TC:19  AU: Monti, Matteo;Santos, Benito;Mascaraque, Arantzazu;Rodriguez de la Fuente, Oscar;Angel Nino, Miguel;Mentes, Tevfik Onur;Locatelli, Andrea;McCarty, Kevin F.;Marco, Jose F.;de la Figuera, Juan;
7:11:15:2     Defects and inhomogeneities in Fe3O4(111) thin film growth on Pt(111)
DOI:10.1103/PhysRevB.86.155430  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Sala, A.;Marchetto, H.;Qin, Z. -H.;Shaikhutdinov, S.;Schmidt, Th;Freund, H. -J.;
7:11:15:3     Magnetic and magnetotransport properties of ZnxFe3-xO4-y thin films
DOI:10.1063/1.4903211  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Jedrecy, N.;Hebert, C.;Perriere, J.;Nistor, M.;Millon, E.;
7:11:15:4     Vibrational spectra of CO adsorbed on oxide thin films: A tool to probe the surface defects and phase changes of oxide thin films
DOI:10.1116/1.4858619  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A  PY:2014
  TC:0  AU: Savara, Aditya;
7:11:15:5     Ferrimagnetism in a ultra-thin decorated Ising film
DOI:10.1016/j.jmmm.2013.02.008  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:7  AU: Kaneyoshi, T.;
7:11:16:1     Absence of abrupt pressure-induced magnetic transitions in magnetite
DOI:10.1103/PhysRevB.82.140412  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Baudelet, Francois;Pascarelli, Sakura;Mathon, Olivier;Itie, Jean-Paul;Polian, Alain;Chervin, Jean-Claude;
7:11:16:2     Spin state of iron in Fe3O4 magnetite and h-Fe3O4
DOI:10.1103/PhysRevB.87.155141  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Bengtson, Amelia;Morgan, Dane;Becker, Udo;
7:11:16:3     Pressure dependence of the Verwey transition in magnetite: An infrared spectroscopic point of view
DOI:10.1063/1.4758303  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Ebad-Allah, J.;Baldassarre, L.;Sing, M.;Claessen, R.;Brabers, V. A. M.;Kuntscher, C. A.;
7:11:16:4     Stability of the ferromagnetic ground state of La2MnNiO6 against large compressive stress
DOI:10.1103/PhysRevB.84.100403  JN:PHYSICAL REVIEW B  PY:2011
  TC:2  AU: Haskel, D.;Fabbris, G.;Souza-Neto, N. M.;van Veenendaal, M.;Shen, G.;Smith, A. E.;Subramanian, M. A.;
7:11:16:5     Pressure-induced magnetoresistivity reversal in magnetite
DOI:10.1063/1.3663217  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Su, Ningning;Han, Yonghao;Ma, Yanzhang;Liu, Hongwu;Ma, Boheng;Gao, Chunxiao;
7:11:17:1     Half-metallicity, magnetic moments, and gap states in oxygen-deficient magnetite for spintronic applications
DOI:10.1063/1.3678028  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Arras, R.;Calmels, L.;Warot-Fonrose, B.;
7:11:17:2     Effects of impurity states on exchange coupling in Fe/Fe3O4 junctions
DOI:10.1103/PhysRevB.85.184431  JN:PHYSICAL REVIEW B  PY:2012
  TC:0  AU: Inoue, J.;Honda, S.;Itoh, H.;Mibu, K.;Yanagihara, H.;Kita, E.;
7:11:17:3     Numerical simulation of random magnetic anisotropy with solid magnetization grains
DOI:10.1016/j.jmmm.2010.08.015  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:7  AU: Lee, S. -J.;Sato, S.;Yanagihara, H.;Kita, E.;Mitsumata, C.;
7:11:17:4     Electronic structure and hyperfine fields in non-stoichiometric magnetite above the Verwey transition
DOI:10.1016/j.jmmm.2009.03.026  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Chlan, Vojtech;Novak, Pavel;Stepankova, Helena;Reznicek, Richard;Kouril, Karel;Kozlowski, Andrzej;
7:11:17:5     Random magnetic anisotropy in isotropic nanocrystalline composite permanent magnets
DOI:10.1063/1.3573483  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Sato, Suguru;Lee, S. J.;Mitsumata, Chiharu;Yanagihara, Hideto;Kita, Eiji;
7:11:18:1     Interplay of bulk and interface effects in the electric-field-driven transition in magnetite
DOI:10.1103/PhysRevB.81.045123  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Fursina, A. A.;Sofin, R. G. S.;Shvets, I. V.;Natelson, D.;
7:11:18:2     Verwey transition in single magnetite nanoparticles
DOI:10.1103/PhysRevB.90.075122  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Yu, Q.;Mottaghizadeh, A.;Wang, H.;Ulysse, C.;Zimmers, A.;Rebuttini, V.;Pinna, N.;Aubin, H.;
7:11:18:3     Metal Oxide Resistive Switching: Evolution of the Density of States Across the Metal-Insulator Transition
DOI:10.1103/PhysRevLett.112.066803  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:1  AU: Mottaghizadeh, A.;Yu, Q.;Lang, P. L.;Zimmers, A.;Aubin, H.;
7:11:18:4     Interfacial transport properties between a strongly correlated transition metal oxide and a metal: Contact resistance in Fe3O4/M (M=Cu, Au, Pt) nanostructures
DOI:10.1103/PhysRevB.82.245112  JN:PHYSICAL REVIEW B  PY:2010
  TC:3  AU: Fursina, A. A.;Sofin, R. G. S.;Shvets, I. V.;Natelson, D.;
7:11:19:1     Impact of interfacial roughness on spin filter tunneling
DOI:10.1063/1.3291065  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Miller, Casey W.;Belyea, Dustin D.;
7:11:19:2     Depth-selective electronic and magnetic properties of a Co2MnSi tunnel magneto-resistance electrode at a MgO tunnel barrier
DOI:10.1063/1.4769180  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:1  AU: Krumme, B.;Ebke, D.;Weis, C.;Makarov, S. I.;Warland, A.;Huetten, A.;Wende, H.;
7:11:19:3     Utility of reactively sputtered CuNx films in spintronics devices
DOI:10.1063/1.3703067  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Fang, Yeyu;Persson, J.;Zha, C.;Willman, J.;Miller, Casey W.;Akerman, Johan;
7:11:19:4     Spin switch based on double spin-filter tunnel junction geometry
DOI:10.1063/1.3500468  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:2  AU: Miao, G. X.;Moodera, J. S.;
7:11:20:1     Sliding charge density waves in manganites?
DOI:10.1016/j.jmmm.2009.03.003  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:10  AU: Fisher, B.;Genossar, J.;Patlagan, L.;Reisner, G. M.;
7:11:20:2     Metal-insulator transition and nonlinear conductivity in Mn-deficient (LaCa)MnO3
DOI:10.1063/1.3677999  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Fisher, B.;Genossar, J.;Patlagan, L.;Reisner, G. M.;
7:11:20:3     Charge growth, dispersion in europium manganite (EuMnO3-delta) ceramics revealed using opto-impedance probe
DOI:10.1016/j.jallcom.2011.02.081  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:1  AU: Radhakrishnan, S.;Jagannathan, R.;
7:11:20:4     Sliding charge-density waves in manganites
DOI:10.1038/nmat2841  JN:NATURE MATERIALS  PY:2010
  TC:3  AU: Fisher, B.;Genossar, J.;Patlagan, L.;Kar-Narayan, S.;Moya, X.;Loudon, J. C.;Mathur, N. D.;
7:11:21:1     Magnetic tunnel junctions with Al2O3 tunnel barriers prepared by atomic layer deposition
DOI:10.1063/1.4807132  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:5  AU: Liu, Xinfei;Shi, Jing;
7:11:21:2     Temperature and bias-voltage dependence of atomic-layer-deposited HfO2-based magnetic tunnel junctions
DOI:10.1063/1.4896994  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Fabretti, Savio;Zierold, Robert;Nielsch, Kornelius;Voigt, Carmen;Ronning, Carsten;Peretzki, Patrick;Seibt, Michael;Thomas, Andy;
7:11:21:3     Tunnel magnetoresistance in alumina, magnesia and composite tunnel barrier magnetic tunnel junctions
DOI:10.1016/j.jmmm.2011.01.011  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:3  AU: Schebaum, Oliver;Drewello, Volker;Auge, Alexander;Reiss, Guenter;Muenzenberg, Markus;Schuhmann, Henning;Seibt, Michael;Thomas, Andy;
7:11:22:1     Magnetite/hematite core/shell fibres grown by laser floating zone method
DOI:10.1016/j.apsusc.2013.01.108  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:0  AU: Ferreira, N. M.;Kovalevsky, A.;Valente, M. A.;Costa, F. M.;Frade, J.;
7:11:22:2     Growth and characterization of Fe3O4 films
DOI:10.1016/j.materresbull.2011.09.008  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:1  AU: Ding, Jian;Zhang, Di;Arita, Makoto;Ikoma, Yoshifumi;Nakamura, Kazuki;Saito, Katsuhiko;Guo, Qixin;
7:11:22:3     Lithium niobate bulk crystallization promoted by CO2 laser radiation
DOI:10.1016/j.apsusc.2011.08.050  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:2  AU: Ferreira, N. M.;Costa, F. M.;Nogueira, R. N.;Graca, M. P. F.;
7:12:1:1     Scattering of electron vortex beams on a magnetic crystal: Towards atomic-resolution magnetic measurements
DOI:10.1103/PhysRevB.89.134428  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Rusz, Jan;Bhowmick, Somnath;Eriksson, Mattias;Karlsson, Nikolaj;
7:12:1:2     Atomic scale electron vortices for nanoresearch
DOI:10.1063/1.3662012  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:41  AU: Verbeeck, J.;Schattschneider, P.;Lazar, S.;Stoeger-Pollach, M.;Loeffler, S.;Steiger-Thirsfeld, A.;Van Tendeloo, G.;
7:12:1:3     Boundaries for Efficient Use of Electron Vortex Beams to Measure Magnetic Properties
DOI:10.1103/PhysRevLett.111.105504  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Rusz, Jan;Bhowmick, Somnath;
7:12:1:4     Novel Vortex Generator and Mode Converter for Electron Beams
DOI:10.1103/PhysRevLett.109.084801  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:21  AU: Schattschneider, P.;Stoeger-Pollach, M.;Verbeeck, J.;
7:12:1:5     Mapping spin-polarized transitions with atomic resolution
DOI:10.1103/PhysRevB.85.134422  JN:PHYSICAL REVIEW B  PY:2012
  TC:13  AU: Schattschneider, P.;Schaffer, B.;Ennen, I.;Verbeeck, J.;
7:12:1:6     Achieving Atomic Resolution Magnetic Dichroism by Controlling the Phase Symmetry of an Electron Probe
DOI:10.1103/PhysRevLett.113.145501  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Rusz, Jan;Idrobo, Juan-Carlos;Bhowmick, Somnath;
7:12:1:7     Exploiting Lens Aberrations to Create Electron-Vortex Beams
DOI:10.1103/PhysRevLett.111.064801  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:18  AU: Clark, L.;Beche, A.;Guzzinati, G.;Lubk, A.;Mazilu, M.;Van Boxem, R.;Verbeeck, J.;
7:12:1:8     Relativistic Electron Vortex Beams: Angular Momentum and Spin-Orbit Interaction
DOI:10.1103/PhysRevLett.107.174802  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:43  AU: Bliokh, Konstantin Y.;Dennis, Mark R.;Nori, Franco;
7:12:1:9     Quantized Orbital Angular Momentum Transfer and Magnetic Dichroism in the Interaction of Electron Vortices with Matter
DOI:10.1103/PhysRevLett.108.074802  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:27  AU: Lloyd, Sophia;Babiker, Mohamed;Yuan, Jun;
7:12:1:10     Direct measurement of ferromagnetic ordering in biaxially strained LaCoO3 thin films
DOI:10.1063/1.3336010  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Klie, R. F.;Yuan, T.;Tanase, M.;Yang, G.;Ramasse, Q.;
7:12:1:11     Highly efficient electron vortex beams generated by nanofabricated phase holograms
DOI:10.1063/1.4863564  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:6  AU: Grillo, Vincenzo;Gazzadi, Gian Carlo;Karimi, Ebrahim;Mafakheri, Erfan;Boyd, Robert W.;Frabboni, Stefano;
7:12:1:12     Electron magnetic chiral dichroism in CrO2 thin films using monochromatic probe illumination in a transmission electron microscope
DOI:10.1016/j.jmmm.2012.06.012  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:7  AU: Loukya, B.;Zhang, X.;Gupta, A.;Datta, R.;
7:12:1:13     Spin-to-Orbital Angular Momentum Conversion and Spin-Polarization Filtering in Electron Beams
DOI:10.1103/PhysRevLett.108.044801  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:29  AU: Karimi, Ebrahim;Marrucci, Lorenzo;Grillo, Vincenzo;Santamato, Enrico;
7:12:1:14     Observation of the Larmor and Gouy Rotations with Electron Vortex Beams
DOI:10.1103/PhysRevLett.110.093601  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:16  AU: Guzzinati, Giulio;Schattschneider, Peter;Bliokh, Konstantin Y.;Nori, Franco;Verbeeck, Jo;
7:12:1:15     Interaction of Relativistic Electron-Vortex Beams with Few-Cycle Laser Pulses
DOI:10.1103/PhysRevLett.112.134801  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:3  AU: Hayrapetyan, Armen G.;Matula, Oliver;Aiello, Andrea;Surzhykov, Andrey;Fritzsche, Stephan;
7:12:1:16     Dichroism in the Interaction between Vortex Electron Beams, Plasmons, and Molecules
DOI:10.1103/PhysRevLett.113.066102  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Asenjo-Garcia, A.;Garcia de Abajo, F. J.;
7:12:1:17     How to Manipulate Nanoparticles with an Electron Beam?
DOI:10.1002/adma.201204206  JN:ADVANCED MATERIALS  PY:2013
  TC:19  AU: Verbeeck, Jo;Tian, He;Van Tendeloo, Gustaaf;
7:12:1:18     Real-space simulations of spin-polarized electronic transitions in iron
DOI:10.1103/PhysRevB.82.144418  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Schattschneider, P.;Verbeeck, J.;Mauchamp, V.;Jaouen, M.;Hamon, A. -L.;
7:12:1:19     Measuring the Orbital Angular Momentum of Electron Vortex Beams Using a Forked Grating
DOI:10.1103/PhysRevLett.111.074801  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:8  AU: Saitoh, Koh;Hasegawa, Yuya;Hirakawa, Kazuma;Tanaka, Nobuo;Uchida, Masaya;
7:12:1:20     Electromagnetic Vortex Fields, Spin, and Spin-Orbit Interactions in Electron Vortices
DOI:10.1103/PhysRevLett.109.254801  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:5  AU: Lloyd, S. M.;Babiker, M.;Yuan, J.;Kerr-Edwards, C.;
7:12:1:21     Simulation of Spatially Resolved Electron Energy Loss Near-Edge Structure for Scanning Transmission Electron Microscopy
DOI:10.1103/PhysRevLett.109.246101  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:3  AU: Prange, M. P.;Oxley, M. P.;Varela, M.;Pennycook, S. J.;Pantelides, S. T.;
7:12:1:22     Origination of electron magnetic chiral dichroism in cobalt-doped ZnO dilute magnetic semiconductors
DOI:10.1016/j.scriptamat.2011.05.013  JN:SCRIPTA MATERIALIA  PY:2011
  TC:5  AU: Zhang, Z. H.;Tao, H. L.;He, Ming;Li, Quan;
7:12:1:23     Local electronic structure information contained in energy-filtered diffraction patterns
DOI:10.1103/PhysRevB.84.064444  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Rusz, Jan;Rubino, Stefano;Eriksson, Olle;Oppeneer, Peter M.;Leifer, Klaus;
7:12:1:24     Detecting Transition Radiation from a Magnetic Moment
DOI:10.1103/PhysRevLett.110.264801  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Ivanov, Igor P.;Karlovets, Dmitry V.;
7:12:1:25     Comment on "Quantized Orbital Angular Momentum Transfer and Magnetic Dichroism in the Interaction of Electron Vortices with Matter"
DOI:10.1103/PhysRevLett.110.189501  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Schattschneider, P.;Loeffler, S.;Verbeeck, J.;
7:12:1:26     Quantitative magnetic measurements with transmission electron microscope
DOI:10.1016/j.jmmm.2009.06.032  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Rusz, Jan;Lidbaum, Hans;Liebig, Andreas;Hjorvarsson, Bjorgvin;Oppeneer, Peter M.;Rubino, Stefano;Eriksson, Olle;Leifer, Klaus;
7:12:1:27     Comment on "Quantized Orbital Angular Momentum Transfer and Magnetic Dichroism in the Interaction of Electron Vortices with Matter" Reply
DOI:10.1103/PhysRevLett.110.189502  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Lloyd, Sophia;Babiker, Mohamed;Yuan, Jun;
7:12:1:28     Observation of the hole state symmetry of MgB2 by inelastic scattering of fast electrons accompanied by boron K-shell excitation
DOI:10.1063/1.4768728  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Saitoh, Koh;Momonoi, Kota;Tanaka, Nobuo;Onari, Seiichiro;
7:12:1:29     Site-Specific Recoil Diffraction of Backscattered Electrons in Crystals
DOI:10.1103/PhysRevLett.106.085503  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:6  AU: Winkelmann, Aimo;Vos, Maarten;
7:12:1:30     Generation of High-Energy Photons with Large Orbital Angular Momentum by Compton Backscattering
DOI:10.1103/PhysRevLett.106.013001  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:19  AU: Jentschura, U. D.;Serbo, V. G.;
7:12:1:31     Spin-to-Orbital Angular Momentum Conversion and Spin-Polarization Filtering in Electron Beams [vol 108, 044801, 2012]
DOI:10.1103/PhysRevLett.109.209901  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:0  AU: Karimi, Ebrahim;Marrucci, Lorenzo;Grillo, Vincenzo;Santamato, Enrico;
7:12:1:32     Comment on "Electromagnetic Vortex Fields, Spin, and Spin-Orbit Interactions in Electron Vortices"
DOI:10.1103/PhysRevLett.113.029501  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Schattschneider, P.;Rehr, J. J.;Allen, L. J.;
7:12:1:33     Interaction of Relativistic Electron-Vortex Beams with Few-Cycle Laser Pulses (vol 112, 134801, 2014)
DOI:10.1103/PhysRevLett.112.149903  JN:PHYSICAL REVIEW LETTERS  PY:2014
  TC:0  AU: Hayrapetyan, Armen G.;Matula, Oliver;Aiello, Andrea;Surzhykov, Andrey;Fritzsche, Stephan;
7:12:2:1     Advanced Electron Microscopy for Advanced Materials
DOI:10.1002/adma.201202107  JN:ADVANCED MATERIALS  PY:2012
  TC:30  AU: Van Tendeloo, Gustaaf;Bals, Sara;Van Aert, Sandra;Verbeeck, Jo;Van Dyck, Dirk;
7:12:2:2     Three-Dimensional Morphology of Iron Oxide Nanoparticles with Reactive Concave Surfaces. A Compressed Sensing-Electron Tomography (CS-ET) Approach
DOI:10.1021/nl202253a  JN:NANO LETTERS  PY:2011
  TC:43  AU: Saghi, Zineb;Holland, Daniel J.;Leary, Rowan;Falqui, Andrea;Bertoni, Giovanni;Sederman, Andrew J.;Gladden, Lynn F.;Midgley, Paul A.;
7:12:2:3     Measuring Porosity at the Nanoscale by Quantitative Electron Tomography
DOI:10.1021/nl103172r  JN:NANO LETTERS  PY:2010
  TC:37  AU: Biermans, E.;Molina, L.;Batenburg, K. J.;Bals, S.;Van Tendeloo, G.;
7:12:2:4     Structure and Relative Thermal Stability of Mesoporous (La,Sr)MnO3 Powders Prepared Using Evaporation-Induced Self-Assembly Methods
DOI:10.1111/j.1551-2916.2012.05236.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Chao, Robin;Munprom, Ratiporn;Petrova, Rumyana;Gerdes, Kirk;Kitchin, John R.;Salvador, Paul A.;
7:12:2:5     Three-dimensional visualization of nanoscale structure and deformation
DOI:10.1557/jmr.2013.245  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:0  AU: McCumiskey, Edward J.;Rudawski, Nicholas G.;Sawyer, W. Gregory;Taylor, Curtis R.;
7:12:3:1     Electromagnetic wave absorption properties of multi-walled carbon nanotubes decorated with La-doped BaTiO3 nanocrystals synthesized by a solvothermal method
DOI:10.1016/j.matchemphys.2011.01.015  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:15  AU: Bi, Cheng;Zhu, Meifang;Zhang, Qinghong;Li, Yaogang;Wang, Hongzhi;
7:12:3:2     Molten salt route of well dispersive barium titanate nanoparticles
DOI:10.1016/j.powtec.2011.11.043  JN:POWDER TECHNOLOGY  PY:2012
  TC:17  AU: Zhang, Yan;Wang, Liqiu;Xue, Dongfeng;
7:12:3:3     Low-temperature preparation of lanthanum-doped BiFeO3 crystallites by a sol-gel-hydrothermal method
DOI:10.1016/j.ceramint.2011.03.081  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:16  AU: Chen, Zhiwu;Hu, Jianqiang;Lu, Zhenya;He, Xinhua;
7:12:3:4     Low-temperature synthesis of BaTiO3 powders by the sol-gel-hydrothermal method
DOI:10.1016/j.ceramint.2013.02.055  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:15  AU: Wang, Wenwen;Cao, Lixin;Liu, Wei;Su, Ge;Zhang, Wenxing;
7:12:3:5     Formation mechanism of zirconia nano-particles containing pores prepared via sol-gel-hydrothermal method
DOI:10.1016/j.apt.2009.11.003  JN:ADVANCED POWDER TECHNOLOGY  PY:2010
  TC:7  AU: Chang, Qibing;Zhou, Jian-er;Wang, Yongqing;Meng, Guangyao;
7:12:3:6     Stearic acid gel derived MgTiO3 nanoparticles: A low temperature intermediate phase of Mg2TiO4
DOI:10.1016/j.jallcom.2009.11.181  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:13  AU: Li, Dandan;Wang, Liqiu;Xue, Dongfeng;
7:12:3:7     Low-temperature synthesis of single-crystalline BiFeO3 using molten KCl-KBr salt
DOI:10.1016/j.ceramint.2013.03.025  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:2  AU: Liu, Yin;Qian, Qian;Yi, Zhiguo;Zhang, Lei;Min, Fanfei;Zhang, Mingxu;
7:12:3:8     Preparation and microwave absorption properties of Ag-doped BaTiO3 nanocomposites
DOI:10.1016/j.jmmm.2014.05.037  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Zhang, Meng;Zheng, Ji;Liang, Lu;Jiang, Fei;Wang, Ying;
7:12:3:9     Synthesis and characterization of pure tetragonal nanocrystalline sulfated 8YSZ powder by sol-gel route
DOI:10.1016/j.powtec.2012.02.013  JN:POWDER TECHNOLOGY  PY:2012
  TC:6  AU: Heshmatpour, Felora;Khodaiy, Zahra;Aghakhanpour, Reza Babadi;
7:12:4:1     Resolving the Structure of Active Sites on Platinum Catalytic Nanoparticles
DOI:10.1021/nl101642f  JN:NANO LETTERS  PY:2010
  TC:48  AU: Chang, Lan Yun;Barnard, Amanda S.;Gontard, Lionel Cervera;Dunin-Borkowski, Rafal E.;
7:12:4:2     Direct Subangstrom Measurement of Surfaces of Oxide Particles
DOI:10.1103/PhysRevLett.105.226101  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:13  AU: Yu, R.;Hu, L. H.;Cheng, Z. Y.;Li, Y. D.;Ye, H. Q.;Zhu, J.;
7:12:4:3     Subangstrom Profile Imaging of Relaxed ZnO(10(1)over-bar0) Surfaces
DOI:10.1021/nl2036172  JN:NANO LETTERS  PY:2012
  TC:9  AU: He, Mo-Rigen;Yu, Rong;Zhu, Jing;
7:12:4:4     Atomic-scale determination of surface facets in gold nanorods
DOI:10.1038/NMAT3462  JN:NATURE MATERIALS  PY:2012
  TC:75  AU: Goris, Bart;Bals, Sara;Van den Broek, Wouter;Carbo-Argibay, Enrique;Gomez-Grana, Sergio;Liz-Marzan, Luis M.;Van Tendeloo, Gustaaf;
7:12:4:5     Surface-induced structural modification in ZnO nanoparticles
DOI:10.1007/s11051-012-1162-4  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2012
  TC:1  AU: Schoenhalz, Aline L.;Dalpian, Gustavo M.;
7:12:5:1     Significant increase of Curie temperature in nano-scale BaTiO3
DOI:10.1063/1.4901169  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Li, Yueliang;Liao, Zhenyu;Fang, Fang;Wang, Xiaohui;Li, Longtu;Zhu, Jing;
7:12:5:2     Fabrication of Monodispersed 5-nm BaTiO3 Nanocrystals with Narrow Size Distribution via One-Step Solvothermal Route
DOI:10.1111/j.1551-2916.2011.04805.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:13  AU: Zhang, Hui;Wang, Xiaohui;Tian, Zhibin;Zhong, Caifu;Zhang, Yichi;Sun, Changku;Li, Longtu;
7:12:5:3     Phase transitions in nanoparticles of BaTiO3 as functions of temperature and pressure
DOI:10.1063/1.4806996  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:5  AU: Han, Wei;Zhu, Jinlong;Zhang, Sijia;Zhang, Hui;Wang, Xiaohui;Wang, Qinglin;Gao, Chunxiao;Jin, Changqing;
7:12:5:4     Phase coexistence evolution of nano BaTiO3 as function of particle sizes and temperatures
DOI:10.1063/1.4751332  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Zhu, Jinlong;Han, Wei;Zhang, Hui;Yuan, Zhen;Wang, Xiaohui;Li, Longtu;Jin, Changqin;
7:12:5:5     Raman spectroscopic study of the size-dependent order parameter of barium titanate
DOI:10.1063/1.4880996  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Sendova, Mariana;Hosterman, Brian D.;
7:12:5:6     Active Silicon Integrated Nanophotonics: Ferroelectric BaTiO3 Devices
DOI:10.1021/nl404513p  JN:NANO LETTERS  PY:2014
  TC:12  AU: Xiong, Chi;Pernice, Wolfram H. P.;Ngai, Joseph H.;Reiner, James W.;Kumah, Divine;Walker, Frederick J.;Ahn, Charles H.;Tang, Hong X.;
7:12:6:1     Surfactant Organic Molecules Restore Magnetism in Metal-Oxide Nanoparticle Surfaces
DOI:10.1021/nl300665z  JN:NANO LETTERS  PY:2012
  TC:34  AU: Salafranca, Juan;Gazquez, Jaume;Perez, Nicolas;Labarta, Amilcar;Pantelides, Sokrates T.;Pennycook, Stephen J.;Batlle, Xavier;Varela, Maria;
7:12:6:2     Circular dichroism in the electron microscope: Progress and applications (invited)
DOI:10.1063/1.3365517  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:14  AU: Schattschneider, P.;Ennen, I.;Loeffler, S.;Stoeger-Pollach, M.;Verbeeck, J.;
7:12:6:3     Site-specific chirality in magnetic transitions
DOI:10.1016/j.jmmm.2012.03.050  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Ennen, I.;Loeffler, S.;Kuebel, C.;Wang, D.;Auge, A.;Huetten, A.;Schattschneider, P.;
7:12:6:4     Atomic site sensitivity of the energy loss magnetic chiral dichroic spectra of complex oxides
DOI:10.1063/1.3556769  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Calmels, L.;Rusz, J.;
7:12:7:1     Electronic structure of magnetic semiconductor CdCr2Te4: A possible spin-dependent symmetry filter
DOI:10.1063/1.4827818  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Sims, H.;Ramasamy, K.;Butler, W. H.;Gupta, A.;
7:12:7:2     Colloidal Synthesis of Magnetic CuCr2S4 Nanocrystals and Nanoclusters
DOI:10.1021/ja209575w  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:7  AU: Ramasamy, Karthik;Mazumdar, Dipanjan;Zhou, Ziyou;Wang, Yu-Hsiang A.;Gupta, Arunava;
7:12:7:3     CoxCu1-xCr2S4 Nanocrystals: Synthesis, Magnetism, and Band Structure Calculations
DOI:10.1021/cm401938f  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:3  AU: Ramasamy, Karthik;Sims, Hunter;Gupta, Ram K.;Kumar, Dhananjay;Butler, William H.;Gupta, Arunava;
7:12:7:4     Structural and magnetic resonance investigations of CuCr2S4 nanoclusters and nanocrystals
DOI:10.1063/1.4891993  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Pankrats, A. I.;Vorotynov, A. M.;Tugarinov, V. I.;Zharkov, S. M.;Velikanov, D. A.;Abramova, G. M.;Zeer, G. M.;Ramasamy, K.;Gupta, A.;
7:12:7:5     Synthesis, characterization and magnetic properties of nearly monodisperse CuCr2Se4 nanoparticles
DOI:10.1088/0957-4484/21/23/235603  JN:NANOTECHNOLOGY  PY:2010
  TC:7  AU: Lin, Chun-Rong;Yeh, Cheng-Lung;Lu, Shih-Zong;Lyubutin, Igor S.;Wang, Sheng-Chang;Suzdalev, Igor P.;
7:12:7:6     Electron spin resonance in CuCrS(2) chrome-copper disulphides synthesized by different methods
DOI:10.1063/1.3374679  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Abramova, Galina;Pankrats, Anatolii;Petrakovskii, German;Rasch, Julia C. E.;Boehm, Martin;Vorotynov, Aleksandr;Tugarinov, Vasilii;Szumszak, Rita;Bovina, Asya;Vasil'ev, Viktor;
7:12:8:1     Substrate-induced strain and its effect in CrO2 thin films
DOI:10.1063/1.3475993  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:6  AU: Pathak, M.;Sato, H.;Zhang, X.;Chetry, K. B.;Mazumdar, D.;LeClair, P.;Gupta, A.;
7:12:8:2     CrO2 thin films epitaxially grown on TiO2 (001): Electronic structure and magnetic properties
DOI:10.1063/1.3552991  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Huang, Xing;Yan, X. H.;Zhu, Z. H.;Yang, Y. R.;Guo, Y. D.;
7:12:8:3     Electrical switching effect of a single-unit-cell CrO2 layer on rutile TiO2 surface
DOI:10.1063/1.4869852  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Li, Si-Da;Liu, Bang-Gui;
7:12:8:4     Structural and magnetic properties of epitaxial CrO2 thin films grown on TiO2 (001) substrates
DOI:10.1063/1.4802957  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Zhang, Xueyu;Zhong, Xing;Visscher, P. B.;LeClair, Patrick R.;Gupta, Arunava;
7:12:8:5     Anomalous transport in half-metallic ferromagnetic CrO2
DOI:10.1103/PhysRevB.88.085123  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Anwar, M. S.;Aarts, J.;
7:12:8:6     Anomalous Hall effect behavior in (100) and (110) CrO2 thin films
DOI:10.1063/1.3583568  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Sato, H.;Pathak, M.;Mazumdar, D.;Zhang, X.;Mankey, G. J.;LeClair, P.;Gupta, A.;
7:12:9:1     Band gap narrowing in BaTiO3 nanoparticles facilitated by multiple mechanisms
DOI:10.1063/1.4871776  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:3  AU: Ramakanth, S.;Raju, K. C. James;
7:12:9:2     Thermometry based on phonon confinement effect in nanoparticles
DOI:10.1063/1.3565250  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:14  AU: Wang, Junwei;Huang, Liping;
7:12:9:3     Substrate effect on phonon confinement in TiO2 nanoparticles for thermal sensing application
DOI:10.1063/1.48959231  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Mishra, Ashish Kumar;Huang, Liping;
7:12:9:4     Synthesis of Monodispersed Barium Titanate Nanoparticles with Narrow Size Distribution by a Modified Alkoxide-Hydroxide Sol-Precipitation Method
DOI:10.1111/j.1551-2916.2010.04126.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Zhang, Xiaoquan;Wang, Xiaohui;Tian, Zhibin;Sun, Tieyu;Li, Longtu;
7:12:10:1     Observation of fluctuation-induced tunneling conduction in micrometer-sized tunnel junctions
DOI:10.1063/1.4749251  JN:AIP ADVANCES  PY:2012
  TC:5  AU: Lai, Yu-Ren;Yu, Kai-Fu;Lin, Yong-Han;Wu, Jong-Ching;Lin, Juhn-Jong;
7:12:10:2     Fluctuation-induced tunneling conduction through RuO2 nanowire contacts
DOI:10.1063/1.3638707  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Lin, Yong-Han;Lin, Juhn-Jong;
7:12:10:3     Barrier height and tunneling aspects in (110) CrO2 with its natural barrier
DOI:10.1063/1.3626471  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Pathak, M.;Mazumdar, D.;Karthik, V.;Zhang, X.;Chetry, K. B.;Keshavarz, S.;LeClair, P.;Gupta, A.;
7:12:10:4     Synthesis and electrical conductivity of perchlorate-doped TTF-diamide nanofibers with double and triple helix structures
DOI:10.1039/c0jm02628j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:11  AU: Ahn, Sejung;Kim, Yukyung;Beak, Seungjae;Ishimoto, Shohei;Enozawa, Hideo;Isomura, Eigo;Hasegawa, Masashi;Iyoda, Masahiko;Park, Yungwoo;
7:12:11:1     Determining the anisotropic exchange coupling of CrO2 via first-principles density functional theory calculations
DOI:10.1103/PhysRevB.81.224436  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Sims, H.;Oset, S. J.;Butler, W. H.;MacLaren, James M.;Marsman, Martijn;
7:12:11:2     A comparison of the growth modes of (100)- and (110)- oriented CrO2 films through the calculation of surface and interface energies
DOI:10.1063/1.3664768  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Chetry, K. B.;Sims, H.;Butler, W. H.;Gupta, A.;
7:12:11:3     Preparation and characterization of CrO2 films by Low Pressure Chemical Vapor Deposition from CrO3
DOI:10.1016/j.tsf.2013.04.118  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Aguilera, C.;Gonzalez, J. C.;Borras, A.;Margineda, D.;Gonzalez, J. M.;Gonzalez-Elipe, A. R.;Espinos, J. P.;
7:12:11:4     Electronic and magnetic structure of CrO2-RuO2 interfaces
DOI:10.1103/PhysRevB.84.054438  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Chetry, K. B.;Sims, H.;Butler, W. H.;Gupta, A.;
7:12:11:5     Comparing magnetotransport and surface magnetic properties of half-metallic CrO2 films grown by low pressure and atmospheric pressure chemical vapor deposition
DOI:10.1063/1.3367783  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:2  AU: Pathak, M.;Zhong, X.;Wang, J.;Zhang, X.;Klein, T. M.;LeClair, P.;Gupta, A.;
7:12:12:1     30-kV spin-polarized transmission electron microscope with GaAs-GaAsP strained superlattice photocathode
DOI:10.1063/1.4737177  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:8  AU: Kuwahara, M.;Kusunoki, S.;Jin, X. G.;Nakanishi, T.;Takeda, Y.;Saitoh, K.;Ujihara, T.;Asano, H.;Tanaka, N.;
7:12:12:2     Coherence of a spin-polarized electron beam emitted from a semiconductor photocathode in a transmission electron microscope
DOI:10.1063/1.4901745  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kuwahara, Makoto;Kusunoki, Soichiro;Nambo, Yoshito;Saitoh, Koh;Jin, Xiuguang;Ujihara, Toru;Asano, Hidefumi;Takeda, Yoshikazu;Tanaka, Nobuo;
7:12:12:3     Photoemission lifetime of a negative electron affinity gallium nitride photocathode
DOI:10.1116/1.4901566  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2014
  TC:1  AU: Nishitani, Tomohiro;Tabuchi, Masao;Amano, Hiroshi;Maekawa, Takuya;Kuwahara, Makoto;Meguro, Takashi;
7:12:13:1     In Situ Electrochemical Electron Microscopy Study of Oxygen Evolution Activity of Doped Manganite Perovskites
DOI:10.1002/adfm.201103173  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:12  AU: Raabe, Stephanie;Mierwaldt, Daniel;Ciston, Jim;Uijttewaal, Matthe;Stein, Helge;Hoffmann, Joerg;Zhu, Yimei;Bloechl, Peter;Jooss, Christian;
7:12:13:2     Energy saving in electrolytic hydrogen production using Co-Cr activation - Part I
DOI:10.1016/j.ijhydene.2012.08.075  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2012
  TC:1  AU: Miulovic, Snezana M.;Maslovara, Sladjana Lj.;Seovic, Mina M.;Radak, Bojan B.;Kaninski, Milica P. Marceta;
7:12:13:3     Cobalt-chrome activation of the nickel electrodes for the HER in alkaline water electrolysis - Part II
DOI:10.1016/j.ijhydene.2012.11.117  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2013
  TC:3  AU: Kaninski, Milica P. Marceta;Seovic, Mina M.;Miulovic, Snezana M.;Zugic, Dragana L.;Tasic, Gvozden S.;Saponjic, Dorde P.;
7:12:14:1     Influence of synthesis conditions on the properties of electrochemically synthesized BaTiO3 nanoparticles
DOI:10.1016/j.ceramint.2013.09.065  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Santos, G. O. S.;Silva, R. S.;Costa, L. P.;Cellet, T. S. P.;Rubira, A. F.;Eguiluz, K. I. B.;Salazar-Banda, G. R.;
7:12:14:2     Low-temperature fabrication of Ba1-xSrxTiO3 thin films with good dielectric properties on platinized silicon substrates
DOI:10.1016/j.jeurceramsoc.2009.05.010  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Zhu, X. H.;Defay, E.;Guigues, B.;Le Rhun, G.;Dubarry, C.;Aid, M.;
7:12:14:3     Low temperature fabrication of barium titanate hybrid films and their dielectric properties
DOI:10.1016/j.tsf.2010.10.037  JN:THIN SOLID FILMS  PY:2011
  TC:5  AU: Kobayashi, Yoshio;Saito, Hirobumi;Kinoshita, Takafumi;Nagao, Daisuke;Konno, Mikio;
7:12:15:1     Electron Vortex Production and Control Using Aberration Induced Diffraction Catastrophes
DOI:10.1103/PhysRevLett.110.033901  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:9  AU: Petersen, T. C.;Weyland, M.;Paganin, D. M.;Simula, T. P.;Eastwood, S. A.;Morgan, M. J.;
7:12:15:2     Transport of Intensity Phase Retrieval of Arbitrary Wave Fields Including Vortices
DOI:10.1103/PhysRevLett.111.173902  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:4  AU: Lubk, Axel;Guzzinati, Giulio;Boerrnert, Felix;Verbeeck, Jo;
7:12:15:3     Publisher's Note: Transport of Intensity Phase Retrieval of Arbitrary Wave Fields Including Vortices (vol 111, 173902, 2013)
DOI:10.1103/PhysRevLett.111.199902  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:0  AU: Lubk, Axel;Guzzinati, Giulio;Boerrnert, Felix;Verbeeck, Jo;
7:12:16:1     Higher-Order Laguerre-Gauss Mode Generation and Interferometry for Gravitational Wave Detectors
DOI:10.1103/PhysRevLett.105.231102  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:17  AU: Granata, M.;Buy, C.;Ward, R.;Barsuglia, M.;
7:12:16:2     Generation of High-Purity Higher-Order Laguerre-Gauss Beams at High Laser Power
DOI:10.1103/PhysRevLett.110.251101  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:6  AU: Carbone, L.;Bogan, C.;Fulda, P.;Freise, A.;Willke, B.;
7:12:17:1     Electromagnetic Duality Symmetry and Helicity Conservation for the Macroscopic Maxwell's Equations
DOI:10.1103/PhysRevLett.111.060401  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:9  AU: Fernandez-Corbaton, Ivan;Zambrana-Puyalto, Xavier;Tischler, Nora;Vidal, Xavier;Juan, Mathieu L.;Molina-Terriza, Gabriel;
7:12:17:2     Role of duality symmetry in transformation optics
DOI:10.1103/PhysRevB.88.085111  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Fernandez-Corbaton, Ivan;Molina-Terriza, Gabriel;
7:13:1:1     Low-temperature synthesis of solid-solution BaxSr1-xTiO3 nanocrystals
DOI:10.1039/c0jm00845a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:21  AU: Beier, Christopher W.;Cuevas, Marie A.;Brutchey, Richard L.;
7:13:1:2     Structural Evolution of BaTiO3 Nanocrystals Synthesized at Room Temperature
DOI:10.1021/ja303184w  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:20  AU: Rabuffetti, Federico A.;Brutchey, Richard L.;
7:13:1:3     Local Structure of Ba1-xSrxTiO3 and BaTi1-yZryO3 Nanocrystals Probed by X-ray Absorption and X-ray Total Scattering
DOI:10.1021/nn405629e  JN:ACS NANO  PY:2013
  TC:6  AU: Rabuffetti, Federico A.;Brutchey, Richard L.;
7:13:1:4     Low Temperature Synthesis of Complex Ba1-xSrxTi1-yZryO3 Perovskite Nanocrystals
DOI:10.1021/cm301754z  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:13  AU: Rabuffetti, Federico A.;Lee, John S.;Brutchey, Richard L.;
7:13:1:5     Vapor Diffusion Sol-Gel Synthesis of Fluorescent Perovskite Oxide Nanocrystals
DOI:10.1002/adma.201104645  JN:ADVANCED MATERIALS  PY:2012
  TC:11  AU: Rabuffetti, Federico A.;Lee, John S.;Brutchey, Richard L.;
7:13:1:6     Rapid Formation of Nanocrystalline BaTiO3 and Its Highly Stable Sol
DOI:10.1111/jace.13153  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Hao, Yanan;Wang, Xiaohui;Kim, Jinyong;Li, Longtu;
7:13:1:7     Low-temperature synthesis of crystalline BaTiO3 nanoparticles by one-step "organosol''-precipitation
DOI:10.1039/c2jm33373b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:13  AU: Gao, Yanling;Shvartsman, Vladimir V.;Elsukova, Anna;Lupascu, Doru C.;
7:13:1:8     Low-Temperature Synthesis of AMoO(4) (A = Ca, Sr, Ba) Scheelite Nanocrystals
DOI:10.1021/cm402867y  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:7  AU: Culver, Sean P.;Rabuffetti, Federico A.;Zhou, Shiliang;Mecklenburg, Matthew;Song, Yan;Melot, Brent C.;Brutchey, Richard L.;
7:13:1:9     Nonmonotonic crystallite-size dependence of the lattice parameter of nanocrystalline nickel
DOI:10.1063/1.3500827  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:10  AU: Sheng, J.;Welzel, U.;Mittemeijer, E. J.;
7:13:1:10     Tailoring the Mechanism of the Amorphous-to-Crystalline Phase Transition of PbTiO3 via Kinetically Controlled Hydrolysis
DOI:10.1021/cm2018289  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:6  AU: Rabuffetti, Federico A.;Brutchey, Richard L.;
7:13:2:1     An improved method for preparation of SrTiO3 nanoparticles
DOI:10.1016/j.matchemphys.2010.09.001  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:23  AU: da Silva, L. F.;Maia, L. J. Q.;Bernardi, M. I. B.;Andres, J. A.;Mastelaro, V. R.;
7:13:2:2     Single-Crystal-like Mesoporous SrTiO3 Spheres with Enhanced Photocatalytic Performance
DOI:10.1111/j.1551-2916.2010.03604.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:33  AU: Wei, Xiao;Xu, Gang;Ren, Zhaohui;Xu, Chunxiao;Weng, Wenjian;Shen, Ge;Han, Gaorong;
7:13:2:3     Microwave-assisted rapid synthesis and photocatalytic activity of mesoporous Nd-doped SrTiO3 nanospheres and nanoplates
DOI:10.1016/j.matlet.2013.02.107  JN:MATERIALS LETTERS  PY:2013
  TC:9  AU: Zheng, Jian-Qiang;Zhu, Ying-Jie;Xu, Jing-San;Lu, Bing-Qiang;Qi, Chao;Chen, Feng;Wu, Jin;
7:13:2:4     Synthesis, structure and properties of heavily Mn-doped perovskite-type SrTiO3 nanoparticles
DOI:10.1016/j.matchemphys.2013.09.034  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:3  AU: Trepakov, V.;Makarova, M.;Stupakov, O.;Tereshina, E. A.;Drahokoupil, J.;Cernansky, M.;Potucek, Z.;Borodavka, F.;Valvoda, V.;Lynnyk, A.;Jaeger, A.;Jastrabik, L.;Dejneka, A.;
7:13:2:5     Soft chemistry preparation methods and properties of strontium titanate nanoparticles
DOI:10.1016/j.optmat.2010.01.007  JN:OPTICAL MATERIALS  PY:2010
  TC:10  AU: Makarova, M.;Dejneka, A.;Franc, J.;Drahokoupil, J.;Jastrabik, L.;Trepakov, V.;
7:13:2:6     Porous SrTiO3 spheres with enhanced photocatalytic performance
DOI:10.1016/j.matlet.2011.09.045  JN:MATERIALS LETTERS  PY:2012
  TC:23  AU: Dong, Wenjun;Li, Xiaoyun;Yu, Jie;Guo, Wanchun;Li, Bingjie;Tan, Li;Li, Chaorong;Shi, Jianjun;Wang, Ge;
7:13:2:7     Liquid-solid reaction synthesis of SrTiO3 submicron-sized particles
DOI:10.1016/j.matchemphys.2011.01.056  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:5  AU: Liu, Xiaohua;Bai, Haixin;
7:13:2:8     Relationship between Crystal Shape, Photoluminescence, and Local Structure in SrTiO3 Synthesized by Microwave-Assisted Hydrothermal Method
DOI:10.1155/2012/890397  JN:JOURNAL OF NANOMATERIALS  PY:2012
  TC:2  AU: da Silva, Luis F.;Avansi, Waldir;Moreira, Mario L.;Mesquita, Alexandre;Maia, Lauro J. Q.;Andres, Juan;Longo, Elson;Mastelaro, Valmor R.;
7:13:2:9     Facile synthesis of SrTiO3 hollow microspheres built as assembly of nanocubes and their associated photocatalytic activity
DOI:10.1016/j.jcis.2011.02.032  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2011
  TC:21  AU: Zheng, Zhaoke;Huang, Baibiao;Qin, Xiaoyan;Zhang, Xiaoyang;Dai, Ying;
7:13:2:10     Solvothermal Synthesis of Shape-Controlled Perovskite MTiO3 (M = Ba, Sr, and Ca) Particles in H2O/Polyols Mixed Solutions
DOI:10.2320/matertrans.M2013350  JN:MATERIALS TRANSACTIONS  PY:2014
  TC:2  AU: Kimijima, Takeshi;Kanie, Kiyoshi;Nakaya, Masafumi;Muramatsu, Atsushi;
7:13:2:11     Fuel Additives and Heat Treatment Effect on the Structure and Morphology of Strontium Titanate Nanopowders Prepared by the Sol-gel Combustion Method
DOI:10.1080/00150193.2013.842110  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Klaytae, Thanawat;Panthong, Phiram;Boonma, Kanok;Thountom, Sarawut;
7:13:2:12     Solvothermal synthesis of SnNb2O6 nanoplates and enhanced photocatalytic H-2 evolution under visible light
DOI:10.1016/j.ijhydene.2013.09.032  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2014
  TC:2  AU: Seo, Se Won;Noh, Tae Hoon;Park, Sangbaek;Lee, Chan Woo;Kim, Sang Hyeon;Kim, Hae Jin;Park, Hun Ki;Hong, Kug Sun;
7:13:2:13     The poly(ethylene glycol) assisted preparation of NH4TiOF3 mesocrystals and their topotactic conversion to TiO2
DOI:10.1039/c2jm30872j  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:4  AU: Inoguchi, Masashi;Afzaal, Mohammad;Tanaka, Nobuhiko;O'Brien, Paul;
7:13:2:14     Chemical solution approach to SrTiO3 synthesis using a new precursor
DOI:10.1007/s10853-011-5817-9  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Wang, Y.;Zhou, L.;Li, C. S.;Yu, Z. M.;Li, J. S.;Jin, L. H.;Shen, Y.;Wang, P. F.;Lu, Y. F.;
7:13:2:15     Preparation of SrTiO3 Nanopowder via Sol-gel Combustion Method
DOI:10.1080/00150193.2013.843412  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Panthong, Phiram;Klaytae, Thanawat;Boonma, Kanok;Thountom, Sarawut;
7:13:2:16     Quantum size effect and emission enhancement by energy transfer in system: Nanosized SrTiO3 and Tb(III) ions entrapped on silica support
DOI:10.1016/j.jnoncrysol.2010.05.028  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2010
  TC:3  AU: Zalewska, Magdalena;Lipowska-Lastowka, Beata;Klonkowski, Andrzej M.;
7:13:2:17     Solvothermal synthesis of nanocrystalline KTaO3: Effect of solvent dielectric constant
DOI:10.1016/j.materresbull.2012.03.028  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:1  AU: Makarova, M.;Bykov, P.;Drahokoupil, J.;Cernansky, M.;Dlabacek, Z.;Dejneka, A.;Jastrabik, L.;Trepakova, V.;
7:13:3:1     High K Capacitors and OFET Gate Dielectrics from Self-Assembled BaTiO3 and (Ba,Sr)TiO3 Nanocrystals in the Superparaelectric Limit
DOI:10.1002/adfm.200901258  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2010
  TC:34  AU: Huang, Limin;Jia, Zhang;Kymissis, Ioannis;O'Brien, Stephen;
7:13:3:2     Structure and performance of dielectric films based on self-assembled nanocrystals with a high dielectric constant
DOI:10.1088/0957-4484/24/41/415602  JN:NANOTECHNOLOGY  PY:2013
  TC:3  AU: Huang, Limin;Liu, Shuangyi;Van Tassell, Barry J.;Liu, Xiaohua;Byro, Andrew;Zhang, Henan;Leland, Eli S.;Akins, Daniel L.;Steingart, Daniel A.;Li, Jackie;O'Brien, Stephen;
7:13:3:3     Comprehensive dielectric performance of bismuth acceptor doped BaTiO3 based nanocrystal thin film capacitors
DOI:10.1039/c2jm34044e  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:8  AU: Liu, Shuangyi;Zhang, Henan;Sviridov, Lev;Huang, Limin;Liu, Xiaohua;Samson, Jacopo;Akins, Dan;Li, Jackie;O'Brien, Stephen;
7:13:3:4     Intrinsic dielectric frequency dependent spectrum of a single domain tetragonal BaTiO3
DOI:10.1063/1.4734004  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:9  AU: Liu, Shuangyi;Huang, Limin;Li, Jackie;O'Brien, Stephen;
7:13:3:5     Influence of electromigration on the maximum operating field of (Ba,Sr)TiO3/parylene-C composite capacitors
DOI:10.1116/1.4828365  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:0  AU: Yang, Shyuan;Kymissis, Ioannis;Leland, Eli S.;Liu, Shuangyi;O'Brien, Stephen;
7:13:3:6     Comment on "Intrinsic dielectric frequency dependent spectrum of a single domain tetragonal BaTiO3" [J. Appl. Phys. 112, 014108 (2012)]
DOI:10.1063/1.4798231  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Deng, Hai-Yao;
7:13:3:7     Effects of polymerization conditions on the properties of poly(furfuryl alcohol) composite membranes
DOI:10.1002/app.35356  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2012
  TC:4  AU: He, Li;Li, Dan;Dong, Dehua;Yao, Jianfeng;Huang, Yi;Wang, Huanting;
7:13:3:8     Comment on "High K Capacitors and OFET Gate Dielectrics from Self-Assembled BaTiO3 and (Ba,Sr) TiO3 Nanocrystals in the Superparaelectric Limit" - On the Superparaelectric State in BaTiO3 Nanocrystals
DOI:10.1002/adfm.201002309  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2011
  TC:0  AU: Mitoseriu, Liliana;Buscaglia, Vincenzo;
7:13:3:9     Laboratory pentacene and parylene evaporation systems for fabricating organic thin film devices
DOI:10.1116/1.3557037  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:1  AU: Jia, Zhang;Lee, Vincent W.;Hsu, Yu-Jen;Kymissis, Ioannis;
7:13:3:10     Influence of Cobalt Ion Doping on Tetragonal-Orthorhombic Polymorphic Transformation and Dielectric Behavior of Barium Titanate Nanoparticles
DOI:10.1111/j.1551-2916.2010.04366.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Barik, Puspendu;Jana, Atanu;Kundu, Tapas Kumar;
7:13:3:11     Response to "Comment on 'Intrinsic dielectric frequency dependent spectrum of a single domain tetragonal BaTiO3'" [J. Appl. Phys. 113, 126104 (2013)]
DOI:10.1063/1.4798232  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Liu, S.;Huang, L.;Li, J.;O'Brien, S.;
7:13:3:12     Raman Responses in Mechanically Activated BaTiO3
DOI:10.1111/jace.12423  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Pavlovic, Vera P.;Nikolic, Maria V.;Pavlovic, Vladimir B.;Blanusa, Jovan;Stevanovic, Suzana;Mitic, Vojislav V.;Scepanovic, Maja;Vlahovic, Branislav;
7:13:3:13     Structure and performance of dielectric films based on self-assembled nanocrystals with a high dielectric constant (vol 24, 415602, 2013)
DOI:10.1088/0957-4484/24/49/499601  JN:NANOTECHNOLOGY  PY:2013
  TC:1  AU: Huang, Limin;Liu, Shuangyi;Van Tassell, Barry J.;Liu, Xiaohua;Byro, Andrew;Zhang, Henan;Leland, Eli S.;Akins, Daniel L.;Steingart, Daniel A.;Li, Jackie;O'Brien, Stephen;
7:13:3:14     Barrier properties of polyethylene terephthalate, atactic polypropylene, and cis-1,4-polybutadiene via molecular dynamics simulation
DOI:10.1039/c0sm01086c  JN:SOFT MATTER  PY:2011
  TC:4  AU: Whitley, David M.;Adolf, David B.;
7:13:4:1     Low temperature preparation of nanocrystalline SrTiO3 and BaTiO3 from alkaline earth nitrates and TiO2 nanocrystals
DOI:10.1016/j.powtec.2011.06.010  JN:POWDER TECHNOLOGY  PY:2011
  TC:9  AU: Liu, Shuang Zhi;Wang, Tian Xi;Yang, Li Yun;
7:13:4:2     Photocatalytic properties of SrTiO3 nanoparticles prepared by a polyacrylamide gel route
DOI:10.1016/j.matlet.2011.07.019  JN:MATERIALS LETTERS  PY:2011
  TC:9  AU: Xian, T.;Yang, H.;Dai, J. F.;Wei, Z. Q.;Ma, J. Y.;Feng, W. J.;
7:13:4:3     Solvothermal synthesis of strontium titanate nanocrystallines from metatitanic acid and photocatalytic activities
DOI:10.1016/j.powtec.2010.11.034  JN:POWDER TECHNOLOGY  PY:2011
  TC:11  AU: Wang, Ning;Kong, Deting;He, Hongcai;
7:13:4:4     Preparation of nanocrystalline SrTiO3 powder by sol-gel combustion method
DOI:10.1016/j.ceramint.2012.10.103  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Klaytae, Thanawat;Panthong, Phiram;Thountom, Sarawut;
7:13:4:5     Preparation of SrTiO3 nanoparticles by the combination of solid phase grinding and low temperature calcining
DOI:10.1016/j.matlet.2010.12.030  JN:MATERIALS LETTERS  PY:2011
  TC:7  AU: Zhu, Qi-An;Xu, Jun-Gu;Xiang, Shang;Chen, Li-Xia;Tan, Zhi-Gang;
7:13:4:6     Substitution site and photoluminescence spectra of Eu3+-substituted SrTiO3 prepared by Pechini method
DOI:10.1016/j.matlet.2011.03.078  JN:MATERIALS LETTERS  PY:2011
  TC:7  AU: Fujishiro, Fumito;Arakawa, Tomonori;Hashimoto, Takuya;
7:13:4:7     Microstructure and dielectric tunable properties of SrO(Sr1-xBaxTiO3)(n) microwave ceramics
DOI:10.1016/j.ceramint.2011.12.035  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:0  AU: Wang, Jiangying;Zhou, Huang;Liu, Jintao;Jin, Shengyong;Sun, Lina;Zhang, Jingji;
7:13:4:8     Milling-induced phenomena in SrTiO3
DOI:10.1016/j.ceramint.2013.12.019  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Psiuk, B.;Szade, J.;Wrzalik, R.;Osadnik, M.;Wala, T.;
7:13:5:1     Low temperature molten salt synthesis of SrTiO3 submicron crystallites and nanocrystals in the eutectic NaCl-KCl
DOI:10.1016/j.matlet.2009.11.040  JN:MATERIALS LETTERS  PY:2010
  TC:36  AU: Li, Hui-Ling;Du, Zhen-Ni;Wang, Gen-Lin;Zhang, Yong-Cai;
7:13:5:2     Synthesis and characterization of Bi3NbTiO9 powders prepared by molten salt method
DOI:10.1016/j.jallcom.2010.04.256  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Li, Bao-rang;Zhang, Nai-qiang;Chang, Hui-bin;Cheng, Yin;Bin-Cao;
7:13:5:3     Morphology and structure of LiNb0.6Ti0.5O3 particles by molten salt synthesis
DOI:10.1016/j.jallcom.2011.07.091  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:2  AU: Lu, Zhiyuan;Wang, Yilin;Wu, Wenjun;Li, Yongxiang;
7:13:5:4     Influence of synthesis conditions on the microstructure of Li-Ta-Ti-O microsheets by molten salt method
DOI:10.1016/j.ceramint.2013.09.046  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Zhang, Zhiqiang;Liu, Zhifu;Li, Yongxiang;
7:13:5:5     Anisotropic Dielectric Properties of LiNb0.6Ti0.5O3 Microwave Ceramics by Screen-Printing Templated Grain Growth
DOI:10.1111/j.1551-2916.2011.04717.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:2  AU: Lu, Zhiyuan;Li, Yali;Wang, Yilin;Wu, Wenjun;Li, Yongxiang;
7:13:5:6     Synthesis of Bi2SiO5 powder by molten salt method
DOI:10.1016/j.matlet.2012.01.111  JN:MATERIALS LETTERS  PY:2012
  TC:6  AU: Lu, Jun-que;Wang, Xiu-feng;Wu, Yuan-ting;Xu, Ya-qin;
7:13:5:7     The effects of processing parameters on molten salt synthesis of CaZrO3 nano-powders using oxide precursors
DOI:10.1016/j.powtec.2014.02.058  JN:POWDER TECHNOLOGY  PY:2014
  TC:1  AU: Fazli, Rahman;Golestani-Fard, F.;
7:13:5:8     Textured Li0.95Nb0.45Ti0.7O3 Microwave Ceramics with Continuously Tunable Dielectric Properties
DOI:10.1080/00150193.2012.676979  JN:FERROELECTRICS  PY:2012
  TC:0  AU: Lu, Zhiyuan;Wang, Yilin;Wu, Wenjun;Li, Yongxiang;
7:13:5:9     Synthesis and characterization of LiCoO2-coated LiNi0.8Co0.15Al0.05O2 cathode materials
DOI:10.1016/j.matlet.2012.05.100  JN:MATERIALS LETTERS  PY:2012
  TC:2  AU: Liu, Wanmin;Hu, Guorong;Du, Ke;Peng, Zhongdong;Cao, Yanbing;Liu, Qiang;
7:13:6:1     Enhanced dielectric properties of Ti-doped Ta2O5 single crystal grown by floating zone technique
DOI:10.1016/j.jallcom.2013.11.062  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:3  AU: Xu, Hong;Jiang, Yijian;Luo, Sijun;Ma, Yunfeng;Wang, Yue;
7:13:6:2     Molten salt synthesis of SrTiO3 nanocrystals using nanocrystalline TiO2 as a precursor
DOI:10.1016/j.powtec.2010.08.068  JN:POWDER TECHNOLOGY  PY:2011
  TC:6  AU: Wang, Tian Xi;Liu, Shuang Zhi;Chen, Jun;
7:13:6:3     Synthesis, characterization and photocatalytic properties of lithium tantalate
DOI:10.1016/j.matchar.2012.03.008  JN:MATERIALS CHARACTERIZATION  PY:2012
  TC:5  AU: Zielinska, Beata;Mijowska, Ewa;Kalenczuk, Ryszard J.;
7:13:6:4     Structural, optical, and morphological properties of laser ablated ZnO doped Ta2O5 films
DOI:10.1016/j.mseb.2010.03.065  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:6  AU: Krishnan, Renju R.;Vinodkumar, R.;Rajan, Geo;Gopchandran, K. G.;Pillai, V. P. Mahadevan;
7:13:6:5     Powder synthesis and properties of LiTaO3 ceramics
DOI:10.1016/j.apt.2014.01.011  JN:ADVANCED POWDER TECHNOLOGY  PY:2014
  TC:1  AU: Yang, Tao;Liu, Yan-gai;Zhang, Lei;Hu, Mei-ling;Yang, Qian;Huang, Zhao-hui;Fang, Ming-hao;
7:13:6:6     Powder Synthesis and Hot-Pressing of a LiTaO3 Ceramic
DOI:10.1111/j.1551-2916.2012.05267.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:3  AU: Chen, Ching-Fong;Llobet, Anna;Brennecka, Geoff L.;Forsyth, Robert T.;Guidry, Dennis R.;Papin, Pallas A.;McCabe, Rodney J.;
7:13:6:7     Photocatalytic hydrogen production in the water/methanol system using Pt/RE:NaTaO3 (RE = Y, La, Ce, Yb) catalysts
DOI:10.1016/j.ijhydene.2013.12.182  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2014
  TC:2  AU: Jana, P.;Mata Montero, C.;Pizarro, P.;Coronado, J. M.;Serrano, D. P.;de la Pena O'Shea, V. A.;
7:13:6:8     Growth and characterization of Fe:Ti:Al2O3 single crystal by floating zone method
DOI:10.1016/j.jcrysgro.2013.02.024  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:1  AU: Xu, Hong;Jiang, Yijian;Fan, Xiujun;Wang, Yue;Liu, Guoqing;
7:13:6:9     Characterization of domain configurations in LiTaO3/Al2O3 ceramic composites
DOI:10.1016/j.matchemphys.2010.08.085  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:3  AU: Liu, Yan'gai;Zhou, Yu;Jia, Dechang;Huang, Zhaohui;Fang, Minghao;
7:13:7:1     Effect of Firing Temperatures on Phase and Morphology Evolution of CaZrO3 Ceramics Synthesized Using the Combustion Technique
DOI:10.1080/00150191003744476  JN:FERROELECTRICS  PY:2010
  TC:9  AU: Thongtha, Atthakorn;Laowanidwatana, Artid;Bongkarn, Theerachai;
7:13:7:2     Influence of Sintering Temperature on Phase Formation, Microstructure and Dielectric Properties of Calcium and Strontium Doped BNT Ceramics Prepared via Combustion Technique
DOI:10.1080/00150193.2013.843425  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Sittiketkorn, Panadda;Laowanidwatana, Artid;Vittayakorn, Naratip;Bongkarn, Theerachai;
7:13:7:3     Fabrication of (Ba1-xSrx)(ZrxTi1-x) O-3 ceramics prepared using the combustion technique
DOI:10.1088/0964-1726/19/12/124001  JN:SMART MATERIALS & STRUCTURES  PY:2010
  TC:6  AU: Thongtha, A.;Angsukased, K.;Bongkarn, T.;
7:13:7:4     The Effects of Firing Temperatures on Phase Formation and Microstructure of Pb0.975Sr0.025TiO3 Ceramics Synthesized via the Combustion Technique
DOI:10.1080/00150191003751141  JN:FERROELECTRICS  PY:2010
  TC:5  AU: Sittiketkorn, Panadda;Ramaneepikool, Somnuk;Bongkarn, Theerachai;
7:13:7:5     Preparation of (Ba1-xSrx)(ZrxTi1-x)O3 Ceramics via the Solid State Reaction Method
DOI:10.1080/00150191003748907  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Thongtha, Atthakorn;Angsukased, Kritsana;Riyamongkol, Naowarat;Bongkarn, Theerachai;
7:13:7:6     Combustion Synthesis and Characterization of Perovskite (Pb0.75Ca0.13Sm0.08) (Ti0.98Mn0.02)O-3 Ceramics
DOI:10.1080/00150193.2013.843402  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Thongtha, Atthakorn;Tupmongkol, Sariya;Laowanidwatana, Artid;Bongkarn, Theerachai;
7:13:7:7     Phase Formation, Microstructure and Dielectric Properties of Bismuth Potassium Titanate Ceramic Fabricated Using the Combustion Technique
DOI:10.1080/10584587.2013.852921  JN:INTEGRATED FERROELECTRICS  PY:2013
  TC:1  AU: Thongtha, Atthakorn;Laowanidwatana, Artid;Bongkarn, Theerachai;
7:13:7:8     Low Temperature Fabrication of Lead-Free KNN-BNT Ceramics via the Combustion Technique
DOI:10.1080/00150193.2013.850351  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Mathrmool, Krailas;Akkarapongtrakul, Aniruj;Sukkum, Supattra;Bongkarn, Theerachai;
7:13:7:9     Effects of Ca and Mn Additions on the Microstructure and Dielectric Properties of (Bi0.5Na0.5)TiO3 Ceramics
DOI:10.1007/s11664-011-1731-9  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2011
  TC:8  AU: Yuan, Y.;Li, E. Z.;Li, B.;Tang, B.;Zhou, X. H.;
7:13:7:10     Low Temperature Fabrication of Dense Calcium Titanate Ceramics via Combustion Technique
DOI:10.1080/10584587.2014.874826  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Julphunthong, Phongthorn;Phengraek, Boonyaphas;Laowanidwatana, Artid;Bongkarn, Theerachai;
7:13:8:1     Structural and spectroscopic studies of La2Ce2O7: Disordered fluorite versus pyrochlore structure
DOI:10.1103/PhysRevB.85.132101  JN:PHYSICAL REVIEW B  PY:2012
  TC:8  AU: Reynolds, Emily;Blanchard, Peter E. R.;Zhou, Qingdi;Kennedy, Brendan J.;Zhang, Zhaoming;Jang, Ling-Yun;
7:13:8:2     Energetics and concentration of defects in Gd2Ti2O7 and Gd2Zr2O7 pyrochlore at high pressure
DOI:10.1016/j.actamat.2010.11.025  JN:ACTA MATERIALIA  PY:2011
  TC:14  AU: Wang, Jianwei;Zhang, Fuxiang;Lian, Jie;Ewing, Rodney C.;Becker, Udo;
7:13:8:3     Pressure and temperature phase diagram of Gd2Ti2O7 under irradiation
DOI:10.1063/1.4901577  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Catillon, G.;Chartier, A.;
7:13:8:4     Solid-state diffusion in amorphous zirconolite
DOI:10.1063/1.4901326  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Yang, C.;Zarkadoula, E.;Dove, M. T.;Todorov, I. T.;Geisler, T.;Brazhkin, V. V.;Trachenko, K.;
7:13:8:5     Novel potentials for modelling defect formation and oxygen vacancy migration in Gd2Ti2O7 and Gd2Zr2O7 pyrochlores
DOI:10.1039/c2jm15264a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:8  AU: Gunn, David S. D.;Allan, Neil L.;Foxhall, Henry;Harding, John H.;Purton, John A.;Smith, W.;Stein, Michael J.;Todorov, Ilian T.;Travis, Karl P.;
7:13:8:6     Understanding the radiation-induced amorphization of zirconolite using molecular dynamics and connectivity topology analysis
DOI:10.1080/14786435.2012.718448  JN:PHILOSOPHICAL MAGAZINE  PY:2013
  TC:3  AU: Foxhall, H. R.;Travis, K. P.;Hobbs, L. W.;Rich, S. C.;Owens, S. L.;
7:13:8:7     Rapid synthesis of single phase Gd2Zr2O7 pyrochlore waste forms by microwave sintering
DOI:10.1016/j.ceramint.2014.05.024  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Lu, Xirui;Ding, Yi;Dan, Hui;Yuan, Shibin;Mao, Xueli;Fan, Long;Wu, Yanlin;
7:13:9:1     Optical properties and band gap characterization of high dielectric constant oxides
DOI:10.1016/j.tsf.2011.10.195  JN:THIN SOLID FILMS  PY:2012
  TC:11  AU: Fursenko, O.;Bauer, J.;Lupina, G.;Dudek, P.;Lukosius, M.;Wenger, Ch.;Zaumseil, P.;
7:13:9:2     Investigation of Embedded Perovskite Nanoparticles for Enhanced Capacitor Permittivities
DOI:10.1021/am504831q  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2014
  TC:0  AU: Krause, Andreas;Weber, Walter M.;Pohl, Darius;Rellinghaus, Bernd;Verheijen, Marcel;Mikolajick, Thomas;
7:13:9:3     Ab initio calculations of the atomic and electronic structure of BaZrO3 (111) surfaces
DOI:10.1016/j.ssi.2012.10.023  JN:SOLID STATE IONICS  PY:2013
  TC:6  AU: Eglitis, R. I.;
7:13:9:4     Reduction of leakage currents with nanocrystals embedded in an amorphous matrix in metal-insulator-metal capacitor stacks
DOI:10.1063/1.3664395  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Krause, A.;Weber, W. M.;Schroeder, U.;Pohl, D.;Rellinghaus, B.;Heitmann, J.;Mikolajick, T.;
7:13:9:5     Evaluation of the electrical and physical properties of thin calcium titanate high-k insulators for capacitor applications
DOI:10.1116/1.3521507  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2011
  TC:3  AU: Krause, A.;Weber, W.;Jahn, A.;Richter, K.;Pohl, D.;Rellinghaus, B.;Schroeder, U.;Heitmann, J.;Mikolajick, T.;
7:13:9:6     First-Principles Calculations of the Atomic and Electronic Structure of CaTiO3 (111) Surfaces
DOI:10.1080/00150193.2011.623620  JN:FERROELECTRICS  PY:2011
  TC:8  AU: Eglitis, R. I.;
7:13:9:7     Effect of the composition on the bandgap width of high-kappa MexTiyOz (Me = Hf, Ta, Sr) layers
DOI:10.1016/j.tsf.2011.02.008  JN:THIN SOLID FILMS  PY:2011
  TC:2  AU: Wang, W. C.;Badylevich, M.;Afanas'ev, V. V.;Stesmans, A.;Popovici, M.;Tomida, K.;Menou, N.;Kittl, J. A.;Lukosius, M.;Kaynak, C. Baristiran;Wenger, Ch.;
7:13:10:1     Effect of oxygen vacancy on the dielectric relaxation of BaTiO3 thin films in a quenched state
DOI:10.1063/1.4717758  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Yao, Sheng-Hong;Yuan, Jin-Kai;Gonon, Patrice;Bai, Jinbo;Pairis, Sebastien;Sylvestre, Alain;
7:13:10:2     Extrinsic effects on dielectric response of ultrafine grain BaTiO3 ceramics
DOI:10.1063/1.3505924  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Zhang, Haitao;Deng, Xiangyun;Li, Ting;Zhang, Wen;Chen, Rike;Tian, Wenwei;Li, Jianbao;Wang, Xiaohui;Li, Longtu;
7:13:10:3     Dielectric and magnetic study of BaTi0.5Mn0.5O3 ceramics, synthesized by solid state sintering, mechanical alloying and chemical routes
DOI:10.1016/j.ceramint.2012.03.009  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Bhowmik, R. N.;
7:13:10:4     Local structure and magnetic inhomogeneity of nano-sized La0.7Sr0.3MnO3 manganites
DOI:10.1063/1.3603003  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:5  AU: Ulyanov, A. N.;Yang, D. S.;Mazur, A. S.;Krivoruchko, V. N.;Levchenko, G. G.;Danilenko, I. A.;Konstantinova, T. E.;
7:13:11:1     Dielectric Grain-Size Effect in High-Permittivity Ceramics
DOI:10.1080/00150193.2010.505511  JN:FERROELECTRICS  PY:2010
  TC:18  AU: Petzelt, Jan;
7:13:11:2     Effective dielectric function of porous Pb(Mg1/3Nb2/3)O-3 ceramics
DOI:10.1103/PhysRevB.89.214307  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Nuzhnyy, D.;Petzelt, J.;Rychetsky, I.;Trefalt, G.;
7:13:11:3     Size Effects in Fine Barium Titanate Particles
DOI:10.1080/00150193.2010.505514  JN:FERROELECTRICS  PY:2010
  TC:7  AU: Sedykh, P.;Michel, D.;Charnaya, E. V.;Haase, J.;
7:13:11:4     Paraelectric Permittivity of (Sr0.8Pb0.2)TiO3-MgO Composites with Low MgO Content
DOI:10.1080/00150193.2014.922841  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Somiya, Yoshitaka;Bhalla, Amar S.;Cross, L. Eric;
7:13:12:1     Dielectric relaxation study of amorphous TiTaO thin films in a large operating temperature range
DOI:10.1063/1.4761980  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Rouahi, A.;Kahouli, A.;Challali, F.;Besland, M. P.;Vallee, C.;Pairis, S.;Yangui, B.;Salimy, S.;Goullet, A.;Sylvestre, A.;
7:13:12:2     Atomic layer deposition of tantalum oxide and tantalum silicate from TaCl5, SiCl4, and O-3: growth behaviour and film characteristics
DOI:10.1039/c3tc31172d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:0  AU: Han, Jeong Hwan;Ungur, Elisaveta;Franquet, Alexis;Opsomer, Karl;Conard, Thierry;Moussa, Alain;De Gendt, Stefan;Van Elshocht, Sven;Adelmann, Christoph;
7:13:12:3     Ultra wide band frequency characterization of integrated TiTaO-based metal-insulator-metal devices
DOI:10.1063/1.3626067  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Bertaud, Thomas;Bermond, Cedric;Challali, Fatiha;Goullet, Antoine;Vallee, Christophe;Flechet, Bernard;
7:13:12:4     Atomic Vapor Depositions of Ti-Ta-O thin films for Metal-Insulator-Metal applications
DOI:10.1016/j.tsf.2011.01.239  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Lukosius, M.;Kaynak, C. Baristiran;Wenger, Ch.;Ruhl, G.;Rushworth, S.;Baumann, P.;
7:13:12:5     Preparation and characterization of TaAlOx high-kappa dielectric for metal-insulator-metal capacitor applications
DOI:10.1016/j.tsf.2010.07.020  JN:THIN SOLID FILMS  PY:2010
  TC:7  AU: Hota, M. K.;Mahata, C.;Bera, M. K.;Mallik, S.;Sarkar, C. K.;Varma, S.;Maiti, C. K.;
7:13:12:6     Improved interface properties of Ge metal-oxide-semiconductor capacitor with TaTiO gate dielectric by using in situ TaON passivation interlayer
DOI:10.1063/1.3581891  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:1  AU: Ji, F.;Xu, J. P.;Liu, J. G.;Li, C. X.;Lai, P. T.;
7:13:13:1     Broad-band conductivity and dielectric spectroscopy of composites of multiwalled carbon nanotubes and poly(ethylene terephthalate) around their low percolation threshold
DOI:10.1088/0957-4484/24/5/055707  JN:NANOTECHNOLOGY  PY:2013
  TC:12  AU: Nuzhnyy, D.;Savinov, M.;Bovtun, V.;Kempa, M.;Petzelt, J.;Mayoral, B.;McNally, T.;
7:13:13:2     Permittivity of Polycrystalline Material
DOI:10.1080/00150193.2013.822781  JN:FERROELECTRICS  PY:2013
  TC:0  AU: Klic, A.;Rychetsky, I.;
7:13:13:3     Dynamic Ferroelectric-Like Softening Due to the Conduction in Disordered and Inhomogeneous Systems: Giant Permittivity Phenomena
DOI:10.1080/00150193.2012.671732  JN:FERROELECTRICS  PY:2012
  TC:12  AU: Petzelt, J.;Rychetsky, I.;Nuzhnyy, D.;
7:13:13:4     Dielectric Response of Arbitrary-Shaped Clusters Studied by the Finite Element Method
DOI:10.1080/00150193.2012.674435  JN:FERROELECTRICS  PY:2012
  TC:6  AU: Rychetsky, I.;Klic, A.;
7:13:13:5     Parametrization of the Permittivity of the Multi-Component (n >= 2) Composite
DOI:10.1080/00150193.2011.594010  JN:FERROELECTRICS  PY:2011
  TC:3  AU: Rychetsky, I.;Klic, A.;
7:13:14:1     Preparation of SrTiO3 nanomaterial by a sol-gel-hydrothermal method
DOI:10.1007/s10853-009-4099-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2010
  TC:17  AU: Fuentes, S.;Zarate, R. A.;Chavez, E.;Munoz, P.;Diaz-Droguett, D.;Leyton, P.;
7:13:14:2     A novel solvothermal route for obtaining strontium titanate nanoparticles
DOI:10.1007/s11051-013-1525-5  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2013
  TC:1  AU: Marquez-Herrera, A.;Ovando-Medina, Victor M.;Corona-Rivera, Miguel A.;Hernandez-Rodriguez, E.;Zapata-Torres, M.;Campos-Gonzalez, E.;Guillen-Cervantes, A.;Zelaya-Angel, O.;Melendez-Lira, M.;
7:13:15:1     Sol-Gel Processing and Characterizations of a Ba0.75Sr0.25Ti 0.95Zr0.05O3 Ceramic
DOI:10.1111/j.1551-2916.2011.04646.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Chen, Ching-Fong;Reagor, David W.;Russell, Steven J.;Marksteiner, Quinn R.;Earley, Lawrence M.;Dalmas, Dale A.;Volz, Heather M.;Guidry, Dennis R.;Papin, Pallas A.;Yang, Pin;
7:13:15:2     Slip casting of sol-gel-synthesized barium strontium zirconium titanate ceramics
DOI:10.1007/s10853-013-7371-0  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:1  AU: Chen, Ching-Fong;Marksteiner, Quinn R.;King, Graham;Wynn, Thomas A.;Treiman, Michael B.;Dalmas, Dale A.;Llobet, Anna;Haynes, William B.;Guidry, Dennis R.;Papin, Pallas A.;
7:13:15:3     Lamination of magnesium oxide spacers to barium strontium zirconium titanate ceramics
DOI:10.1007/s10853-014-8238-8  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:1  AU: Chen, Ching-Fong;Marksteiner, Quinn R.;Reiten, Matthew R.;Wynn, Thomas A.;Guidry, Dennis R.;
7:14:1:1     Origin of superstructures in (double) perovskite thin films
DOI:10.1063/1.4895636  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Shabadi, V.;Major, M.;Komissinskiy, P.;Vafaee, M.;Radetinac, A.;Yazdi, M. Baghaie;Donner, W.;Alff, L.;
7:14:1:2     Ferrimagnetism and spontaneous ordering of transition metals in double perovskite La2CrFeO6 films
DOI:10.1103/PhysRevB.84.064436  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Chakraverty, S.;Ohtomo, A.;Okuyama, D.;Saito, M.;Okude, M.;Kumai, R.;Arima, T.;Tokura, Y.;Tsukimoto, S.;Ikuhara, Y.;Kawasaki, M.;
7:14:1:3     Local electronic and magnetic studies of an artificial La2FeCrO6 double perovskite
DOI:10.1063/1.3455323  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:14  AU: Gray, Benjamin;Lee, Ho Nyung;Liu, Jian;Chakhalian, J.;Freeland, J. W.;
7:14:1:4     Spontaneous atomic ordering and magnetism in epitaxially stabilized double perovskites
DOI:10.1557/jmr.2012.438  JN:JOURNAL OF MATERIALS RESEARCH  PY:2013
  TC:8  AU: Ohtomo, Akira;Chakraverty, Suvankar;Mashiko, Hisanori;Oshima, Takayoshi;Kawasaki, Masashi;
7:14:1:5     Energetic stability and magnetic coupling in (Cr1-xFex)(2)O-3: Evidence for a ferrimagnetic ilmenite-type superlattice from first principles
DOI:10.1103/PhysRevB.83.214424  JN:PHYSICAL REVIEW B  PY:2011
  TC:15  AU: Nabi, Hasan Sadat;Pentcheva, Rossitza;
7:14:1:6     Atomistic geometry and bonding characteristics at the Sr2FeTaO6/SrTiO3 interface
DOI:10.1063/1.4809536  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Lv, Shuhui;Saito, Mitsuhiro;Wang, Zhongchang;Chakraverty, Suvankar;Kawasaki, Masashi;Ikuhara, Yuichi;
7:14:1:7     Magnetic and electronic properties of ordered double-perovskite La2VMnO6 thin films
DOI:10.1103/PhysRevB.84.132411  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Chakraverty, S.;Yoshimatsu, K.;Kozuka, Y.;Kumigashira, H.;Oshima, M.;Makino, T.;Ohtomo, A.;Kawasaki, M.;
7:14:1:8     Spontaneous B-site order and metallic ferrimagnetism in LaSrVMoO6 grown by pulsed laser deposition
DOI:10.1063/1.4809937  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Chakraverty, S.;Yu, X. Z.;Kawasaki, M.;Tokura, Y.;Hwang, H. Y.;
7:14:1:9     Band-gap narrowing in alpha-(CrxFe1-x)(2)O-3 solid-solution films
DOI:10.1063/1.3669704  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:13  AU: Mashiko, Hisanori;Oshima, Takayoshi;Ohtomo, Akira;
7:14:1:10     Atomic-scale structure and electronic property of the La2FeCrO6/SrTiO3 interface
DOI:10.1063/1.4821795  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Lv, Shuhui;Saito, Mitsuhiro;Wang, Zhongchang;Chen, Chunlin;Chakraverty, Suvankar;Kawasaki, Masashi;Ikuhara, Yuichi;
7:14:1:11     Magnetic properties of Sr2FeTaO6 double perovskite epitaxially grown by pulsed-laser deposition
DOI:10.1063/1.3663214  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:3  AU: Chakraverty, S.;Saito, M.;Tsukimoto, S.;Ikuhara, Y.;Ohtomo, A.;Kawasaki, M.;
7:14:1:12     Structural and Magnetic Study of Cu (x) FeCr1-x O-2 Oxides Under High External Magnetic Fields
DOI:10.1007/s11664-013-2513-3  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2013
  TC:2  AU: Ozkendir, Osman Murat;
7:14:1:13     Phase formation, phonon behavior, and magnetic properties of novel ferromagnetic La3BAlMnO9 (B=Co or Ni) triple perovskites
DOI:10.1063/1.3360352  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Singh, M. P.;Truong, K. D.;Jandl, S.;Fournier, P.;
7:14:1:14     Multiferroic properties of La-doped Bi2FeCrO6 prepared by high-pressure synthesis
DOI:10.1063/1.3670576  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Bai, Feiming;Shi, Lei;Zhang, Huaiwu;Zhong, Zhiyong;Wang, Wendan;He, Duanwei;
7:14:2:1     Evaluation of half-metallic antiferromagnetism in A(2)CrFeO(6) (A = La, Sr)
DOI:10.1103/PhysRevB.85.224404  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Lee, Kwan-Woo;Ahn, Kyo-Hoon;
7:14:2:2     Evaluation of compensated magnetism in La2VCuO6: Exploration of charge states
DOI:10.1103/PhysRevB.84.115134  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Pardo, Victor;Pickett, Warren E.;
7:14:2:3     Compensated half-metallicity in the trigonally distorted perovskite NiCrO3
DOI:10.1103/PhysRevB.83.180406  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Lee, Kwan-Woo;Pickett, Warren E.;
7:14:2:4     Signature of an antiferromagnetic metallic ground state in heavily electron-doped Sr2FeMoO6
DOI:10.1103/PhysRevB.86.054433  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Jana, Somnath;Meneghini, Carlo;Sanyal, Prabuddha;Sarkar, Soumyajit;Saha-Dasgupta, Tanusri;Karis, Olof;Ray, Sugata;
7:14:2:5     Half-metallic ferrimagnetism driven by Coulomb-enhanced spin-orbit coupling in PdCrO3
DOI:10.1103/PhysRevB.84.172405  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Jin, Hyo-Sun;Lee, Kwan-Woo;
7:14:2:6     Atomic-scale chemical fluctuation in LaSrVMoO6, a proposed half-metallic antiferromagnet
DOI:10.1103/PhysRevB.82.180407  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Jana, Somnath;Singh, Vijay;Kaushik, S. D.;Meneghini, Carlo;Pal, Prabir;Knut, Ronny;Karis, Olof;Dasgupta, Indra;Siruguri, Vasudeva;Ray, Sugata;
7:14:2:7     Investigation of possible half-metallic antiferromagnets on double perovskites LaABB ' O-6 (A=Ca, Sr, Ba; B, B '=transition elements)
DOI:10.1063/1.3488642  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Chen, S. H.;Xiao, Z. R.;Liu, Y. P.;Wang, Y. K.;
7:14:2:8     Ni6Cr5MoO18: A compensated half metal predicted from first-principles
DOI:10.1063/1.4789351  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Wang, Jing;Zu, Ningning;Solovyev, Igor V.;Wu, Zhijian;
7:14:2:9     Half metal to insulator transition driven by electron doping in Ba2FeReO6
DOI:10.1016/j.jmmm.2013.03.016  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:1  AU: Wang, J.;Zu, N. N.;Wang, Y.;Wu, Z. J.;
7:14:2:10     LaSrVMoO6: A case study for A-site covalency-driven local cationic order in double perovskites
DOI:10.1103/PhysRevB.86.014203  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Jana, Somnath;Singh, Vijay;Nag, Abhishek;Meneghini, Carlo;Dasgupta, Indra;Aquilanti, Giuliana;Ray, Sugata;
7:14:2:11     Molten-Salt-Mediated Syntheses of Sr2FeReO6, Ba2FeReO6, and Sr2CrReO6: Particle Sizes, B/B ' Site Disorder, and Magnetic Properties
DOI:10.1021/cm202545z  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:9  AU: Fuoco, Lindsay;Rodriguez, Dianny;Peppel, Tim;Maggard, Paul A.;
7:14:2:12     Half metallic character of NiMoO3 driven by the electron correlation and spin-orbit coupling
DOI:10.1063/1.4739847  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:0  AU: Wang, J.;Wu, Z. J.;
7:14:2:13     First-principle calculation on nearly half-metallic antiferromagnetic behavior of double perovskites La2VReO6
DOI:10.1016/j.jmmm.2010.08.059  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:3  AU: Chen, S. H.;Xiao, Z. R.;Liu, Y. P.;Lee, P. H.;Wang, Y. K.;
7:14:2:14     The influence of the M (3d) replacement on structural, electronic and magnetic properties of Nb-based double perovskite Ba2MNbO6 (M = Sc, Ti, V and Cr): From FP-LMTO studies
DOI:10.1016/j.commatsci.2013.10.009  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:0  AU: H.-E., M. Musa Saad;
7:14:2:15     Electronic structures of compensated magnetism in double perovskites A(2)CrRu(Os) O-6 (A = Si, Ge, Sn, and Pb) from ab initio calculations
DOI:10.1016/j.jallcom.2012.08.066  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:0  AU: Fuh, Huei-Ru;Liu, Yun-Ping;Chen, Shao-Hua;Wang, Yin-Kuo;
7:14:3:1     Surface magnetism, Morin transition, and magnetic dynamics in antiferromagnetic alpha-Fe2O3 (hematite) nanograins
DOI:10.1063/1.3327433  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:36  AU: Bhowmik, R. N.;Saravanan, A.;
7:14:3:2     Structural characterization and ferromagnetic properties in Ga3+ doped alpha-Fe2O3 system prepared by coprecipitation route and vacuum annealing
DOI:10.1063/1.4896482  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:4  AU: Bhowmik, R. N.;Vijayasri, G.;Ranganathan, R.;
7:14:3:3     Magnetic, dielectric and photo-absorption study of a ferromagnetic semiconductor alpha-Fe1.4Ga0.6O3
DOI:10.1063/1.3624734  JN:AIP ADVANCES  PY:2011
  TC:8  AU: Naresh, N.;Bhowmik, R. N.;
7:14:3:4     Study of surface magnetism, exchange bias effect, and enhanced ferromagnetism in alpha-Fe1.4Ti0.6O3 alloy
DOI:10.1063/1.3585663  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Naresh, N.;Bhowmik, R. N.;Ghosh, B.;Banerjee, S.;
7:14:3:5     Synthesis and microstructural properties of alpha-Fe1-xGaxOOH solid solutions
DOI:10.1016/j.jallcom.2013.07.076  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:4  AU: Krehula, Stjepko;Krehula, Ljerka Kratofil;Music, Svetozar;
7:14:3:6     Band gap and function engineering for novel functional alloy semiconductors: Bloomed as magnetic properties at room temperature with alpha-(GaFe)(2)O-3
DOI:10.1063/1.4807651  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:13  AU: Kaneko, Kentaro;Kakeya, Itsuhiro;Komori, Sachio;Fujita, Shizuo;
7:14:3:7     Atomistic structure and energetics of interface between Mn-doped gamma-Ga2O3 and MgAl2O4
DOI:10.1007/s10853-011-5313-2  JN:JOURNAL OF MATERIALS SCIENCE  PY:2011
  TC:2  AU: Hayashi, Hiroyuki;Huang, Rong;Oba, Fumiyasu;Hirayama, Tsukasa;Tanaka, Isao;
7:14:4:1     Magnetization jumps and exchange bias induced by a partially disordered antiferromagnetic state in (FeTiO3)(0.9)-(Fe2O3)(0.1)
DOI:10.1063/1.4881527  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Song, P.;Li, G. K.;Ma, L.;Zhen, C. M.;Hou, D. L.;Wang, W. H.;Liu, E. K.;Chen, J. L.;Wu, G. H.;
7:14:4:2     Magnetic clusters in ilmenite-hematite solid solutions
DOI:10.1103/PhysRevB.81.224423  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Frandsen, C.;Burton, B. P.;Rasmussen, H. K.;McEnroe, S. A.;Morup, S.;
7:14:4:3     Slow dynamics and field-induced transitions in a mixed-valence oxide solid solution
DOI:10.1103/PhysRevB.83.224414  JN:PHYSICAL REVIEW B  PY:2011
  TC:9  AU: Charilaou, M.;Loeffler, J. F.;Gehring, A. U.;
7:14:4:4     Interaction-Induced Partitioning and Magnetization Jumps in the Mixed-Spin Oxide FeTiO3-Fe2O3
DOI:10.1103/PhysRevLett.107.057202  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:5  AU: Charilaou, M.;Sahu, K. K.;Zhao, S.;Loeffler, J. F.;Gehring, A. U.;
7:14:4:5     Steep energy landscapes and adjustable magnetization states in a four-layer mean-field model with competing interactions
DOI:10.1103/PhysRevB.86.104415  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Charilaou, M.;Sahu, K. K.;Gehring, A. U.;Loeffler, J. F.;
7:14:4:6     Large spontaneous magnetostriction in FeTiO3 and adjustable magnetic configuration in Fe(III)-doped FeTiO3
DOI:10.1103/PhysRevB.86.024439  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Charilaou, M.;Sheptyakov, D.;Loeffler, J. F.;Gehring, A. U.;
7:14:4:7     Monte Carlo study of partitioning mechanisms in mixed-spin Ising systems
DOI:10.1103/PhysRevB.84.224434  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Charilaou, M.;Sahu, K. K.;Gehring, A. U.;Loeffler, J. F.;
7:14:5:1     Effect of high-pressure on the electronic and magnetic properties in double perovskite oxide Sr2FeMoO6
DOI:10.1063/1.4768195  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Qian, Yan;Wu, Haiping;Lu, Ruifeng;Tan, Weishi;Xiao, Chuanyun;Deng, Kaiming;
7:14:5:2     S doping effect on the properties of double perovskite La2FeMoO6
DOI:10.1063/1.3697675  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:7  AU: Wu, Haiping;Lu, Ruifeng;Tan, Weishi;Xiao, Chuanyun;Deng, Kaiming;Qian, Yan;
7:14:5:3     Biaxial strain effect on the electronic and magnetic phase transitions in double perovskite La2FeMnO6: A first-principles study
DOI:10.1063/1.4818321  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Qian, Yan;Wu, Haiping;Kan, ErJun;Lu, Jian;Lu, Ruifeng;Liu, Yuzhen;Tan, Weishi;Xiao, Chuanyun;Deng, Kaiming;
7:14:5:4     The theoretical search for half-metallic material: The non-stoichiometric peroskite oxide Sr2FeCoO6-delta
DOI:10.1063/1.3644493  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Wu, Haiping;Qian, Yan;Tan, Weishi;Xiao, Chuanyun;Deng, Kaiming;Lu, Ruifeng;
7:14:5:5     Disorder induced magnetism and electrical conduction in La doped Ca2FeMoO6 double perovskite
DOI:10.1063/1.3510495  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:5  AU: Poddar, Asok;Bhowmik, R. N.;Muthuselvam, I. Panneer;
7:14:5:6     Disorder effect on the electronic and magnetic properties of Sr2FeCoO6: A density-functional theoretical investigation
DOI:10.1063/1.3653238  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Wu, Haiping;Wang, Lili;Qian, Yan;Tan, Weishi;Xiao, Chuanyun;Deng, Kaiming;
7:14:5:7     Enhanced ferromagnetism in nano-sized Zn0.95Mn0.05O grains
DOI:10.1016/j.jmmm.2010.02.035  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Bhowmik, R. N.;Poddar, Asok;Saravanan, A.;
7:14:6:1     Ferrimagnetism and possible double perovskite structure in half Cr-doped YMn0.5Cr0.5O3
DOI:10.1016/j.jallcom.2013.03.166  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:9  AU: Yang, Lei;Duanmu, Qingyong;Hao, Lin;Zhang, Zhongfeng;Wang, Xiaoping;Wei, Yiyong;Zhu, Hong;
7:14:6:2     Double-perovskite multiferroic Bi2FeCrO6 polycrystalline thin film: The structural, multiferroic, and ferroelectric domain properties
DOI:10.1016/j.jallcom.2012.11.187  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:11  AU: Sha, L.;Miao, J.;Wu, S. Z.;Xu, X. G.;Jiang, Y.;Qiao, L. J.;
7:14:6:3     Pressure induced semiconductor to half metal transition in Sr2NiReO6
DOI:10.1063/1.4826906  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Wang, Jing;Sun, Xiaobo;Zu, Ningning;Wu, Zhijian;
7:14:6:4     Layered B-site cation ordering: A key factor in ferrimagnetism of Y(2)MnCrO6
DOI:10.1016/j.jallcom.2014.02.119  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Hao, Lin;Yang, Lei;Lee, Ming-Hsien;Lin, Tseh-Hsing;Zhang, ZhongFeng;Xie, XiangNan;Zhu, Hong;
7:14:6:5     First-principles study of a pressure-induced spin transition in multiferroic Bi2FeCrO6
DOI:10.1103/PhysRevB.86.024415  JN:PHYSICAL REVIEW B  PY:2012
  TC:4  AU: Goffinet, Marco;Iniguez, Jorge;Ghosez, Philippe;
7:14:7:1     Investigation of high quality magnetite thin films grown on SrTiO3(001) substrates by pulsed laser deposition
DOI:10.1016/j.tsf.2012.10.076  JN:THIN SOLID FILMS  PY:2012
  TC:9  AU: Hamie, A.;Dumont, Y.;Popova, E.;Fouchet, A.;Warot-Fonrose, B.;Gatel, C.;Chikoidze, E.;Scola, J.;Berini, B.;Keller, N.;
7:14:7:2     Stoichiometric magnetite grown by infrared nanosecond pulsed laser deposition
DOI:10.1016/j.apsusc.2013.06.026  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:4  AU: Sanz, Mikel;Oujja, Mohamed;Rebollar, Esther;Marco, Jose F.;de la Figuera, Juan;Monti, Matteo;Bollero, Alberto;Camarero, Julio;Pedrosa, Francisco J.;Garcia-Hernandez, Mar;Castillejo, Marta;
7:14:7:3     Magnetic force microscopy of epitaxial magnetite films through the Verwey transition
DOI:10.1063/1.3502606  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:3  AU: Lee, A. K. H.;Jayathilaka, P. B.;Bauer, C. A.;Monti, M. C.;Markert, J. T.;de Lozanne, A.;Miller, Casey W.;
7:14:7:4     Room temperature in-plane (100) magnetic easy axis for Fe3O4/SrTiO3(001):Nb grown by infrared pulsed laser deposition
DOI:10.1063/1.4837656  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Monti, Matteo;Sanz, Mikel;Oujja, Mohamed;Rebollar, Esther;Castillejo, Marta;Pedrosa, Francisco J.;Bollero, Alberto;Camarero, Julio;Cunado, Jose Luis F.;Nemes, Norbert M.;Mompean, Federico J.;Garcia-Hernandez, Mar;Nie, Shu;McCarty, Kevin F.;N'Diaye, Alpha T.;Chen, Gong;Schmid, Andreas K.;Marco, Jose F.;de la Figuera, Juan;
7:14:7:5     Selective growth of pure magnetite thin films and/or nanowires grown in situ at a low temperature by pulsed laser deposition
DOI:10.1039/c2tc00672c  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:5  AU: Yun, Jong-Gu;Lee, Young-Mi;Lee, Won-Jae;Kim, Chang-Soo;Yoon, Soon-Gil;
7:14:7:6     Gold coating of micromechanical DNA biosensors by pulsed laser deposition
DOI:10.1063/1.4761986  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:0  AU: Rebollar, Esther;Sanz, Mikel;Esteves, Carina;Martinez, Nicolas F.;Ahumada, Oscar;Castillejo, Marta;
7:14:7:7     Laser ablation and deposition of wide bandgap semiconductors: plasma and nanostructure of deposits diagnosis
DOI:10.1007/s11051-011-0570-1  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:8  AU: Sanz, M.;Lopez-Arias, M.;Rebollar, E.;de Nalda, R.;Castillejo, M.;
7:14:7:8     Impact of ultrathin transition metal buffer layers on Fe3O4 thin films
DOI:10.1063/1.3350910  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Jayathilaka, P. B.;Bauer, C. A.;Williams, D. V.;Monti, M. C.;Markert, J. T.;Miller, Casey W.;
7:14:8:1     Direct Evidence of Fe2+-Fe3+ Charge Ordering in the Ferrimagnetic Hematite-Ilmenite Fe1.35Ti0.65O3-delta Thin Films
DOI:10.1103/PhysRevLett.111.167202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:3  AU: Bocher, L.;Popova, E.;Nolan, M.;Gloter, A.;Chikoidze, E.;March, K.;Warot-Fonrose, B.;Berini, B.;Stephan, O.;Keller, N.;Dumont, Y.;
7:14:8:2     Epitaxial growth of the high temperature ferromagnetic semiconductor Fe1.5Ti0.5O3 on silicon-compatible substrate
DOI:10.1063/1.3595271  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:6  AU: Hamie, Ali;Popova, Elena;Dumont, Yves;Chikoidze, Ekaterina;Warot-Fonrose, Benedicte;Berini, Bruno;Keller, Niels;
7:14:8:3     Conductivity type inversion in wide band gap antiferromagnetic FeTiO3
DOI:10.1063/1.4798537  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Chikoidze, E.;Tchelidze, T.;Popova, E.;Maso, P.;Ponjavidze, N.;Keller, N.;Dumont, Y.;
7:14:8:4     Magnetic structures of FeTiO3-Fe2O3 solid solution thin films studied by soft X-ray magnetic circular dichroism and ab initio multiplet calculations
DOI:10.1063/1.4868638  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Hojo, H.;Fujita, K.;Ikeno, H.;Matoba, T.;Mizoguchi, T.;Tanaka, I.;Nakamura, T.;Takeda, Y.;Okane, T.;Tanaka, K.;
7:14:8:5     Structural, optical, and magnetic properties of the ferromagnetic semiconductor hematite-ilmenite Fe(2-x)TixO(3-delta) thin films on SrTiO3(001) prepared by pulsed laser deposition
DOI:10.1063/1.3501104  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:3  AU: Hamie, A.;Dumont, Y.;Popova, E.;Scola, J.;Fouchet, A.;Berini, B.;Keller, N.;
7:14:9:1     Synthesis and properties of iridium-doped hematite (alpha-Fe2O3)
DOI:10.1016/j.jallcom.2012.08.009  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:6  AU: Krehula, Stjepko;Stefanic, Goran;Zadro, Kreso;Krehula, Ljerka Kratofil;Marcius, Marijan;Music, Svetozar;
7:14:9:2     IrFeOx/SiO2-A highly active catalyst for preferential CO oxidation in H-2
DOI:10.1016/j.ijhydene.2009.07.016  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2010
  TC:18  AU: Zhang, Wansheng;Huang, Yanqiang;Wang, Junhu;Liu, Kuo;Wang, Xiaodong;Wang, Aiqin;Zhang, Tao;
7:14:9:3     The effect of iridium(III) ions on the formation of iron oxides in a highly alkaline medium
DOI:10.1016/j.jallcom.2011.12.052  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:4  AU: Krehula, Stjepko;Music, Svetozar;
7:14:9:4     Development of porous alpha-Fe2O3 microstructure by forced hydrolysis of FeCl3 solutions in the presence of AOT
DOI:10.1016/j.jallcom.2012.04.011  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Stajdohar, Jasenka;Ristic, Mira;Music, Svetozar;
7:14:9:5     Growth of uniform lath-like alpha-(Fe,Al)OOH and disc-like alpha-(Fe,Al)(2)O-3 nanoparticles in a highly alkaline medium
DOI:10.1016/j.matchemphys.2010.03.063  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:4  AU: Krehula, Stjepko;Music, Svetozar;
7:14:9:6     Novel highly efficient alumina-supported cobalt nitride catalyst for preferential CO oxidation at high temperatures
DOI:10.1016/j.ijhydene.2010.11.082  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2011
  TC:9  AU: Yao, Zhiwei;Zhang, Xiaohong;Peng, Feng;Yu, Hao;Wang, Hongjuan;Yang, Jian;
7:14:10:1     How does spacer length of imidazolium gemini surfactants control the fabrication of 2D-Langmuir films of silver-nanoparticles at the air-water interface?
DOI:10.1016/j.jcis.2014.05.018  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2014
  TC:6  AU: Datta, Sougata;Biswas, Joydeep;Bhattacharya, Santanu;
7:14:10:2     Fe t(2g) band dispersion and spin polarization in thin films of Fe3O4(001)/MgO(001): Half-metallicity of magnetite revisited
DOI:10.1103/PhysRevB.87.085118  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Wang, W.;Mariot, J. -M.;Richter, M. C.;Heckmann, O.;Ndiaye, W.;De Padova, P.;Taleb-Ibrahimi, A.;Le Fevre, P.;Bertran, F.;Bondino, F.;Magnano, E.;Krempasky, J.;Blaha, P.;Cacho, C.;Parmigiani, F.;Hricovini, K.;
7:14:10:3     Fe3O4/gamma-Fe2O3 Nanoparticle Multilayers Deposited by the Langmuir-Blodgett Technique for Gas Sensors Application
DOI:10.1021/la404542u  JN:LANGMUIR  PY:2014
  TC:11  AU: Capone, S.;Manera, M. G.;Taurino, A.;Siciliano, P.;Rella, R.;Luby, S.;Benkovicova, M.;Siffalovic, P.;Majkova, E.;
7:14:10:4     Temperature dependent dendritic domain shapes in Langmuir monolayers of tetradecanoyl N-ethanolamide at the air-water interface
DOI:10.1016/j.jcis.2010.09.038  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2011
  TC:4  AU: Hossain, Md. Mufazzal;Iimura, Kenichi;Yoshida, Masaki;Kato, Teiji;
7:14:10:5     Enhanced Optical and Nonlinear Optical Responses in a Polyelectrolyte Templated Langmuir-Blodgett Film
DOI:10.1021/la104078g  JN:LANGMUIR  PY:2011
  TC:3  AU: Rajesh, K.;Balaswamy, B.;Yamamoto, K.;Yamaki, H.;Kawamata, J.;Radhakrishnan, T. P.;
7:14:10:6     Effect of head groups on the phase transitions in Gibbs adsorption layers at the air-water interface
DOI:10.1016/j.jcis.2010.04.007  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2010
  TC:2  AU: Hossain, Md. Mufazzal;Iimura, Kenichi;Yoshida, Masaki;Sakai, Takaya;Kato, Teiji;
7:14:11:1     Microwave-assisted preparation of submicron-sized FeTiO3 powders
DOI:10.1016/j.ceramint.2013.11.142  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:3  AU: Ru, Juanjian;Hua, Yixin;Xu, Cunying;Li, Jian;Li, Yan;Wang, Ding;Gong, Kai;Wang, Rui;Zhou, Zhongren;
7:14:11:2     Nano-ilmenite FeTiO3: Synthesis and characterization
DOI:10.1016/j.jmmm.2012.11.028  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:7  AU: Raghavender, A. T.;Nguyen Hoa Hong;Lee, Kyu Joon;Jung, Myung-Hwa;Skoko, Z.;Vasilevskiy, M.;Cerqueira, M. F.;Samantilleke, A. P.;
7:14:11:3     Influence of cation disorder on the magnetic properties of ball-milled ilmenite (FeTiO3)
DOI:10.1016/j.matchemphys.2012.06.050  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:1  AU: Morup, Steen;Rasmussen, Helge K.;Brok, Erik;Keller, Lukas;Frandsen, Cathrine;
7:14:11:4     Novel mechanochemical synthesis of fine FeTiO3 nanoparticles by a high-speed ball-milling process
DOI:10.1016/j.jallcom.2010.05.090  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Ohara, Satoshi;Sato, Kazuyoshi;Tan, Zhenquan;Shimoda, Hirofumi;Ueda, Masami;Fukui, Takehisa;
7:14:11:5     Synthesis, characterization and dye adsorption of ilmenite nanoparticles
DOI:10.1016/j.jnoncrysol.2010.09.070  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2011
  TC:20  AU: Chen, Y. H.;
7:14:11:6     Synthesis of ferromagnetic semiconductor 0.67FeTiO(3)-0.33Fe(2)O(3) powder by chemical co-precipitation
DOI:10.1016/j.jmmm.2009.11.011  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:4  AU: Yan, Shiming;Ge, Shihui;Qiao, Wen;Zuo, Yalu;
7:14:12:1     Magnetic coupling parameters at an oxide-oxide interface from first principles: Fe2O3-FeTiO3
DOI:10.1103/PhysRevB.81.214432  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Nabi, Hasan Sadat;Harrison, Richard J.;Pentcheva, Rossitza;
7:14:12:2     Spin states of iron impurities in magnesium oxide under pressure: A possible intermediate state
DOI:10.1103/PhysRevB.87.165113  JN:PHYSICAL REVIEW B  PY:2013
  TC:0  AU: Larico, R.;Assali, L. V. C.;Justo, J. F.;
7:14:12:3     Impact of excess iron on the calculated electronic and magnetic properties of gallium ferrite
DOI:10.1103/PhysRevB.85.174411  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Ibrahim, F.;Alouani, M.;
7:14:12:4     First principles study of the spontaneous electric polarization in Ga2-xFexO3
DOI:10.1016/j.tsf.2012.10.138  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Stoeffler, Daniel;
7:14:13:1     Magnetoelectric spintronics
DOI:10.1063/1.4811823  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:7  AU: Kleemann, W.;
7:14:13:2     Effect of lattice deformation on exchange coupling constants in Cr2O3
DOI:10.1063/1.4865780  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Kota, Yohei;Imamura, Hiroshi;Sasaki, Munetaka;
7:14:13:3     Exchange bias and coercivity of Ni80Fe20 layer coupled with Fe-doped Cr2O3
DOI:10.1063/1.3340508  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:1  AU: Ki, Sanghoon;Dho, Joonghoe;
7:14:14:1     (Sr1-xBax)FeO2 (0.4 <= x <= 1): A New Oxygen-Deficient Perovskite Structure
DOI:10.1021/ja3007403  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2012
  TC:6  AU: Yamamoto, Takafumi;Kobayashi, Yoji;Hayashi, Naoaki;Tassel, Cedric;Saito, Takashi;Yamanaka, Shoji;Takano, Mikio;Ohoyama, Kenji;Shimakawa, Yuichi;Yoshimura, Kazuyoshi;Kageyama, Hiroshi;
7:14:14:2     Random fan-out state induced by site-random interlayer couplings
DOI:10.1103/PhysRevB.84.214408  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Tamura, Ryo;Kawashima, Naoki;Yamamoto, Takafumi;Tassel, Cedric;Kageyama, Hiroshi;
7:14:14:3     Pressure-Induced Structural, Magnetic, and Transport Transitions in the Two-Legged Ladder Sr3Fe2O5
DOI:10.1021/ja200410z  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2011
  TC:8  AU: Yamamoto, Takafumi;Tassel, Cedric;Kobayashi, Yoji;Kawakami, Takateru;Okada, Taku;Yagi, Takehiko;Yoshida, Hideto;Kamatani, Takanori;Watanabe, Yoshitaka;Kikegawa, Takumi;Takano, Mikio;Yoshimura, Kazuyoshi;Kageyama, Hiroshi;
7:15:1:1     Metal-insulator transition and the Pr3+/Pr4+ valence shift in (Pr1-yYy)(0.7)Ca0.3CoO3
DOI:10.1103/PhysRevB.82.165107  JN:PHYSICAL REVIEW B  PY:2010
  TC:24  AU: Hejtmanek, J.;Santava, E.;Knizek, K.;Marysko, M.;Jirak, Z.;Naito, T.;Sasaki, H.;Fujishiro, H.;
7:15:1:2     Magnetically inhomogeneous ground state below the first-order valence transition in (Pr1-yYy)(0.7)Ca0.3CoO3-delta
DOI:10.1103/PhysRevB.89.184427  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Phelan, D.;Bhatti, Kanwal Preet;Taylor, M.;Wang, Shun;Leighton, C.;
7:15:1:3     Valence change of praseodymium in Pr0.5Ca0.5CoO3 investigated by x-ray absorption spectroscopy
DOI:10.1103/PhysRevB.84.115131  JN:PHYSICAL REVIEW B  PY:2011
  TC:17  AU: Herrero-Martin, J.;Garcia-Munoz, J. L.;Valencia, S.;Frontera, C.;Blasco, J.;Baron-Gonzalez, A. J.;Subias, G.;Abrudan, R.;Radu, F.;Dudzik, E.;Feyerherm, R.;
7:15:1:4     Valence transition in (Pr,Ca)CoO3 cobaltites: Charge migration at the metal-insulator transition
DOI:10.1103/PhysRevB.84.045104  JN:PHYSICAL REVIEW B  PY:2011
  TC:20  AU: Luis Garcia-Munoz, Jose;Frontera, Carlos;Baron-Gonzalez, Aura J.;Valencia, Sergio;Blasco, Javier;Feyerherm, Ralf;Dudzik, Esther;Abrudan, Radu;Radu, Florin;
7:15:1:5     Coupled valence and spin state transition in (Pr0.7Sm0.3)(0.7)Ca0.3CoO3
DOI:10.1103/PhysRevB.87.115114  JN:PHYSICAL REVIEW B  PY:2013
  TC:8  AU: Guillou, F.;Zhang, Q.;Hu, Z.;Kuo, C. Y.;Chin, Y. Y.;Lin, H. J.;Chen, C. T.;Tanaka, A.;Tjeng, L. H.;Hardy, V.;
7:15:1:6     Charge transfer, valence, and the metal-insulator transition in Pr0.5Ca0.5CoO3
DOI:10.1103/PhysRevB.81.155113  JN:PHYSICAL REVIEW B  PY:2010
  TC:27  AU: Knizek, K.;Hejtmanek, J.;Novak, P.;Jirak, Z.;
7:15:1:7     Spin-state transition in Pr0.5Ca0.5CoO3 analyzed by x-ray absorption and emission spectroscopies
DOI:10.1103/PhysRevB.86.125106  JN:PHYSICAL REVIEW B  PY:2012
  TC:12  AU: Herrero-Martin, J.;Garcia-Munoz, J. L.;Kvashnina, K.;Gallo, E.;Subias, G.;Alonso, J. A.;Baron-Gonzalez, A. J.;
7:15:1:8     Role of A-site cations in the metal-insulator transition in Pr0.5Ca0.5CoO3-gamma (gamma approximate to 0)
DOI:10.1103/PhysRevB.81.054427  JN:PHYSICAL REVIEW B  PY:2010
  TC:20  AU: Baron-Gonzalez, A. J.;Frontera, C.;Garcia-Munoz, J. L.;Blasco, J.;Ritter, C.;
7:15:1:9     Evolution of spin and valence states of (Pr0.7Sm0.3)(0.7)Ca0.3CoO3 at high temperature and high pressure
DOI:10.1103/PhysRevB.90.035107  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Chen, J. M.;Lee, J. M.;Haw, S. C.;Chen, S. A.;Hardy, V.;Guillou, F.;Chen, S. W.;Kuo, C. Y.;Pao, C. W.;Lee, J. F.;Hiraoka, N.;Ishii, H.;Tsuei, K. D.;Hu, Z.;
7:15:1:10     Structural, transport, and magnetic properties of narrow bandwidth Nd1-xCaxCoO3-delta and comparisons to Pr1-xCaxCoO3-delta
DOI:10.1103/PhysRevB.88.075119  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Phelan, D.;Suzuki, Y.;Wang, S.;Huq, A.;Leighton, C.;
7:15:1:11     Simultaneous valence shift of Pr and Tb ions at the spin-state transition in (Pr1-yTby)(0.7)Ca0.3CoO3
DOI:10.1103/PhysRevB.87.155153  JN:PHYSICAL REVIEW B  PY:2013
  TC:4  AU: Fujishiro, H.;Naito, T.;Takeda, D.;Yoshida, N.;Watanabe, T.;Nitta, K.;Hejtmanek, J.;Knizek, K.;Jirak, Z.;
7:15:1:12     Suppression of the metal-insulator transition by magnetic field in (Pr1-yYy)(0.7)Ca0.3CoO3 (y=0.0625)
DOI:10.1063/1.4884435  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Naito, Tomoyuki;Fujishiro, Hiroyuki;Nishizaki, Terukazu;Kobayashi, Norio;Hejtmanek, Jiri;Knizek, Karel;Jirak, Zdenek;
7:15:1:13     Spontaneous formation of an exchange-spring composite via magnetic phase separation in Pr1-xCaxCoO3
DOI:10.1103/PhysRevB.82.100411  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: El-Khatib, S.;Bose, Shameek;He, C.;Kuplic, J.;Laver, M.;Borchers, J. A.;Huang, Q.;Lynn, J. W.;Mitchell, J. F.;Leighton, C.;
7:15:1:14     The low temperature magnetostructural transition in Pr0.50Sr0.50CoO3: Bulk versus thin film behavior
DOI:10.1063/1.4865465  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Padilla-Pantoja, J.;Herrero-Martin, J.;Torrelles, X.;Bozzo, B.;Blasco, J.;Ritter, C.;Garcia-Munoz, J. L.;
7:15:1:15     Glassy ferromagnetism and phase separation in Pr0.5Ca0.5CoO3
DOI:10.1063/1.3671435  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Marysko, M.;Jirak, Z.;Hejtmanek, J.;Knizek, K.;
7:15:1:16     Transition from the diamagnetic insulator to ferromagnetic metal in La1-xSrxCoO3
DOI:10.1016/j.jmmm.2009.04.031  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:8  AU: Knizek, Karel;Jirak, Zdenek;Hejtmanek, Jiri;Novak, Pavel;
7:15:1:17     Thermally and field-driven spin-state transitions in (Pr1-yYy)(0.7)Ca0.3CoO3
DOI:10.1063/1.3559485  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Marysko, M.;Jirak, Z.;Knizek, K.;Novak, P.;Hejtmanek, J.;Naito, T.;Sasaki, H.;Fujishiro, H.;
7:15:1:18     Local orbital occupation and energy levels of Co in NaxCoO2: A soft x-ray absorption study
DOI:10.1103/PhysRevB.81.115138  JN:PHYSICAL REVIEW B  PY:2010
  TC:5  AU: Lin, H. -J.;Chin, Y. Y.;Hu, Z.;Shu, G. J.;Chou, F. C.;Ohta, H.;Yoshimura, K.;Hebert, S.;Maignan, A.;Tanaka, A.;Tjeng, L. H.;Chen, C. T.;
7:15:1:19     Determination of the Co Valence in Bilayer Hydrated Superconducting NaxCoO2 center dot yH(2)O by Soft X-Ray Absorption Spectroscopy
DOI:10.1103/PhysRevLett.107.066404  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:3  AU: Ohta, H.;Yoshimura, K.;Hu, Z.;Chin, Y. Y.;Lin, H. -J.;Hsieh, H. H.;Chen, C. T.;Tjeng, L. H.;
7:15:1:20     Phase diagram and isotope effect in (Pr1-yEuy)(0.7)Ca0.3CoO3 cobaltites exhibiting spin-state transitions
DOI:10.1103/PhysRevB.81.134427  JN:PHYSICAL REVIEW B  PY:2010
  TC:9  AU: Kalinov, A. V.;Gorbenko, O. Yu.;Taldenkov, A. N.;Rohrkamp, J.;Heyer, O.;Jodlauk, S.;Babushkina, N. A.;Fisher, L. M.;Kaul, A. R.;Kamenev, A. A.;Kuzmova, T. G.;Khomskii, D. I.;Kugel, K. I.;Lorenz, T.;
7:15:1:21     Spin-state crossover and low-temperature magnetic state in yttrium-doped Pr0.7Ca0.3CoO3
DOI:10.1103/PhysRevB.88.224412  JN:Algarabel, Pedro/K-8583-2014; Ibarra, Manuel Ricardo/K-1150-2014; Rodriguez Fernandez, Jesus/L-7960-2014;Morellon, Luis/0000-0003-3724-508X; Marcano Aguado,;Noelia/0000-0002-5331-9758;  PY:100  TC:arabel, Pedro/0000-0002-4698-3378;;Ibarra, Manuel Ricardo/0000-0003-0681-8260;;0;0;0;0;0;1098-0121;WOS:000332161300004;;;J;Minar, Jiri;Gremaud, Benoit;From antiferromagnetic ordering to magnetic textures in the;two-dimensional Fermi-Hubbard model with synthetic spin-orbit;interactions;PHYSICAL REVIEW B;88;23;235130;10.1103/PhysRevB.88.235130;DEC 30 2013;2013;We study the interacting Fermi-Hubbard model in two spatial dimensions;with synthetic gauge coupling of the spin-orbit Rashba type, at;half-filling. Using real-space mean-field theory, we numerically;determine the phase as a function of the interaction strength for;different values of the gauge-field parameter. For a fixed value of the;gauge field, we observe that when the strength of the repulsive;interaction is increased, the system enters into an antiferromagnetic;phase, then undergoes a first-order phase transition to a noncollinear;magnetic phase. Depending on the gauge-field parameter, this phase;further evolves to the one predicted from the effective Heisenberg model;obtained in the limit of large interaction strength. We explain the;presence of the antiferromagnetic phase at small interaction from the;computation of the spin-spin susceptibility, which displays a divergence;at low temperatures for the antiferromagnetic ordering. We discuss, how;the divergence is related to the nature of the underlying Fermi;surfaces. Finally, the fact that the first-order phase transitions for;different gauge-field parameters occur at unrelated critical interaction;strengths arises from a Hofstadter-like situation, i.e., for different;magnetic phases, the mean-field Hamiltonians have different;translational symmetries.;1;0;0;0;1;1098-0121;WOS:000332163500001;;;J;Rochal, S. B.;Lorman, V. L.;Yuzyuk, Yu. I.;Two-dimensional elasticity determines the low-frequency dynamics of;single-and double-walled carbon nanotubes;PHYSICAL REVIEW B;88;23;235435;10.1103/PhysRevB.88.235435;DEC 30 2013;2013;We develop a continuous theory of low-frequency dynamics for nanotubes;with walls constituted by singleatom monolayer, the topological;elasticity of which is not related to its vanishing macroscopic;thickness. The applicability region of the theory proposed includes all;truly two-dimensional materials such as graphene and MoS2. New;comprehensive interpretation and analytical expressions for;low-frequency modes in single-walled carbon nanotube (SWCNT) are given.;The theory unambiguously relates the radial breathing modes of SWCNT and;breathinglike modes of the double-walled carbon nanotube (DWCNT). The;existing Raman data on DWCNTs are fitted better than in the frame of;previous models.;Yuzyuk, Yuri/A-1285-2009;0;0;0;0;0;1098-0121;WOS:000332163500006;;;J;Wagner, Markus R.;Callsen, Gordon;Reparaz, Juan S.;Kirste, Ronny;Hoffmann, Axel;Rodina, Anna V.;Schleife, Andre;Bechstedt, Friedhelm;Phillips, Matthew R.;Effects of strain on the valence band structure and exciton-polariton;energies in ZnO;PHYSICAL REVIEW B;88;23;235210;10.1103/PhysRevB.88.235210;DEC 30 2013;2013;The uniaxial stress dependence of the band structure and the;exciton-polariton transitions in wurtzite ZnO is thoroughly studied;using modern first-principles calculations based on the HSE+ G(0)W(0);approach, k center dot p modeling using the deformation potential;framework, and polarized photoluminescence measurements. The ordering of;the valence bands [A(Gamma(7)), B(Gamma(9)), C(Gamma(7))] is found to be;robust even for high uniaxial and biaxial strains. Theoretical results;for the uniaxial pressure coefficients and splitting rates of the A, B,;and C valence bands and their optical transitions are obtained including;the effects of the spin-orbit interaction. The excitonic deformation;potentials are derived and the stress rates for hydrostatic pressure are;determined based on the results for uniaxial and biaxial stress. In;addition, the theory for the stress dependence of the exchange;interaction and longitudinal-transversal splitting of the exciton;polaritons is developed using the basic exciton functions of the;quasicubic approximation and taking the interaction between all exciton;states into account. It is shown that the consideration of these effects;is crucial for an accurate description of the stress dependence of the;optical spectra in ZnO. The theoretical results are compared to;polarized photoluminescence measurements of different ZnO substrates as;function of uniaxial pressure and experimental values reported in the;literature demonstrating an excellent agreement with the computed;pressure coefficients.;Wagner, Markus/A-3582-2009;Wagner, Markus/0000-0002-7367-5629;3;0;1;0;3;1098-0121;WOS:000332163500004;;;J;Zhang, Jian-Min;Ming, Wenmei;Huang, Zhigao;Liu, Gui-Bin;Kou, Xufeng;Fan, Yabin;Wang, Kang L.;Yao, Yugui;Stability, electronic, and magnetic properties of the magnetically doped;topological insulators Bi2Se3, Bi2Te3, and Sb2Te3;PHYSICAL REVIEW B;88;23;235131;10.1103/PhysRevB.88.235131;DEC 30 2013;2013;Magnetic interaction with the gapless surface states in a topological;insulator (TI) has been predicted to give rise to a few exotic quantum;phenomena. However, the effective magnetic doping of TI is still;challenging in the experiment. Using first-principles calculations, the;magnetic doping properties (V, Cr, Mn, and Fe) in three strong TIs;(Bi2Se3, Bi2Te3, and Sb2Te3) are investigated. We find that for all;three TIs the cation-site substitutional doping is most energetically;favorable with the anion-rich environment as the optimal growth;condition. Further, our results show that under the nominal doping;concentration of 4%, Cr- and Fe-doped Bi2Se3, Bi2Te3, and Cr-doped;Sb2Te3 remain as insulators, while all the V-and Mn-doped TIs, and;Fe-doped Sb2Te3 become metal. We also show that the magnetic interaction;of Cr-doped Bi2Se3 tends to be ferromagnetic, while Fe-doped Bi2Se3 is;likely to be antiferromagnetic. Finally, we estimate the magnetic;coupling and the Curie temperature for the promising ferromagnetic;insulator (Cr-doped Bi2Se3) by Monte Carlo simulation. These findings;may provide important guidance for the magnetism incorporation in TIs;experimentally.;Yao, Yugui/A-8411-2012; Liu, Gui-Bin/A-2724-2009; Zhang, Jian-Min/A-7757-2012;Liu, Gui-Bin/0000-0001-5935-7555;;4;0;0;0;4;1098-0121;WOS:000332163500002;;;J;Zitko, R.;Hansen, D.;Perepelitsky, E.;Mravlje, J.;Georges, A.;Shastry, B. S.;Extremely correlated Fermi liquid theory meets dynamical mean-field;theory: Analytical insights into the doping-driven Mott transition;PHYSICAL REVIEW B;88;23;235132;10.1103/PhysRevB.88.235132;DEC 30 2013;2013;We consider a doped Mott insulator in the large dimensionality limit;within both the recently developed extremely correlated Fermi liquid;(ECFL) theory and the dynamical mean-field theory (DMFT). We show that;the general structure of the ECFL sheds light on the rich frequency;dependence of the DMFT self-energy. Using the leading Fermi liquid form;of the two key auxiliary functions introduced in the ECFL theory, we;obtain an analytical ansatz, which provides a good quantitative;description of the DMFT self-energy down to hole doping level delta;similar or equal to 0.2. In particular, the deviation from Fermi liquid;behavior and the corresponding particle-hole asymmetry developing at a;low-energy scale are well reproduced by this ansatz. The DMFT being;exact at large dimensionality, our study also provides a benchmark of;the ECFL in this limit. We find that the main features of the;self-energy and spectral line shape are well reproduced by the ECFL;calculations in the O(lambda(2)) minimal scheme, for not too low doping;level delta greater than or similar to 0.3. The DMFT calculations;reported here are performed using a state-of-the-art numerical;renormalization-group impurity solver, which yields accurate results;down to an unprecedentedly small doping level delta less than or similar;to 0.001.;1;0;0;0;1;1098-0121;WOS:000332163500003;;;J;Barros, M. S. M.;Nascimento Junior, A. J.;Macedo-Junior, A. F.;Ramos, J. G. G. S.;Barbosa, A. L. R.;Open chaotic Dirac billiards: Weak (anti)localization, conductance;fluctuations, and decoherence;PHYSICAL REVIEW B;88;24;245133;10.1103/PhysRevB.88.245133;DEC 30 2013;2013;In this paper, we investigate the transport properties of open chaotic;Dirac billiards and their intrinsic (chiral universal) symmetry classes.;The prominent examples of these systems are some categories of;topological insulators and graphene structures. We extend the;diagrammatic method of integration over the unitary group and obtain;analytical results for the semiclassical limit and for the high quantum;limit in the universal regime. We show the emergence of quantum;fingerprints characteristic of the chiral symmetries, which are;amplified in the presence of a single open channel in each electronic;terminals. We compare the chaotic Dirac billiards with the "Schrodinger;billiards" in a myriad of regimes, exhibiting the differences between;the chiral universal classes and the Wigner-Dyson classes. Two numerical;methods were used to confirm our analytical findings, yielding also the;distribution of conductances. We also investigate analytically the;effect of dephasing using the characteristic time scales of the chaotic;billiards and we show the appearance of peculiar numbers of chaos.;0;0;0;0;0;1098-0121;WOS:000332164700008;;;J;Cooke, D. G.;Jepsen, P. Uhd;Lek, Jun Yan;Lam, Yeng Ming;Sy, F.;Dignam, M. M.;Picosecond dynamics of internal exciton transitions in CdSe nanorods;PHYSICAL REVIEW B;88;24;241307;10.1103/PhysRevB.88.241307;DEC 30 2013;2013;The picosecond dynamics of excitons in colloidal CdSe nanorods are;directly measured via their 1s to 2p-like internal transitions by;ultrabroadband terahertz spectroscopy. Broadened absorption peaks from;both the longitudinal and transverse states are observed at 8.5 and 11;THz, respectively. The onset of exciton-LO phonon coupling appears as a;bleach in the optical conductivity spectra at the LO phonon energy for;times > 1 ps after excitation. Simulations show a suppressed exciton;temperature due to thermally excited hole states being rapidly captured;onto ligands or unpassivated surface states. The relaxation kinetics are;manipulated and the longitudinal transition is quenched by surface;ligand exchange with hole capturing pyridine.;Lam, Yeng Ming/A-2230-2011;Lam, Yeng Ming/0000-0001-9390-8074;1;0;0;0;1;1098-0121;WOS:000332164700002;;;J;Cote, R.;Barrette, Manuel;Validity of the two-component model of bilayer and trilayer graphene in;a magnetic field;PHYSICAL REVIEW B;88;24;245445;10.1103/PhysRevB.88.245445;DEC 30 2013;2013;The eigenstates of an electron in the chiral two-dimensional electron;gas (C2DEG) formed in an AB-stacked bilayer or an ABC-stacked trilayer;graphene is a spinor with four or six components, respectively. These;components give the amplitude of the wave function on the four or six;carbon sites in the unit cell of the lattice. In the tight-binding;approximation, the eigenenergies are thus found by diagonalizing a 4 x 4;or a 6 x 6 matrix. In the continuum approximation where the electron;wave vector k << 1/a(0), with a(0) the lattice constant of the graphene;sheets, a common approximation is the two-component (or "two-band");model(1) where the eigenstates for the bilayer and trilayer systems are;described by a two-component spinor that gives the amplitude of the wave;function on the two sites with low energy vertical bar E vertical bar <<;gamma(1) where gamma(1) is the hopping energy between sites that are;directly above one another in adjacent layers. The two-component model;has been used extensively to study the phase diagram of the C2DEG in a;magnetic field as well as its transport and optical properties. In this;paper, we use a numerical approach to compute the eigenstates and Landau;level energies of the full tight-binding model in the continuum;approximation and compare them with the prediction of the two-component;model when the magnetic field or an electrical bias between the;outermost layers is varied. Our numerical analysis shows that the;two-component model is a good approximation for bilayer graphene in a;wide range of magnetic field and bias but mostly for Landau level M = 0.;The applicability of the two-component model in trilayer graphene, even;for level M = 0, is much more restricted. In this case, the;two-component model fails to reproduce some of the level crossings that;occur between the sublevels of M = 0.;3;0;0;0;3;1098-0121;WOS:000332164700013;;;J;Gammelmark, Soren;Zinner, Nikolaj Thomas;Dipoles on a two-leg ladder;PHYSICAL REVIEW B;88;24;245135;10.1103/PhysRevB.88.245135;DEC 30 2013;2013;We study polar molecules with long-range dipole-dipole interactions;confined to move on a two-leg ladder for different orientations of the;molecular dipole moments with respect to the ladder. Matrix product;states are employed to calculate the many-body ground state of the;system as a function of lattice filling fractions, perpendicular hopping;between the legs, and dipole interaction strength. We show that the;system exhibits zigzag ordering when the dipolar interactions are;predominantly repulsive. As a function of dipole moment orientation with;respect to the ladder, we find that there is a critical angle at which;ordering disappears. This angle is slightly larger than the angle at;which the dipoles are noninteracting along a single leg. This behavior;should be observable using current experimental techniques.;2;0;0;0;2;1098-0121;WOS:000332164700010;;;J;Hofer, Patrick P.;Buettiker, Markus;Emission of time-bin entangled particles into helical edge states;PHYSICAL REVIEW B;88;24;241308;10.1103/PhysRevB.88.241308;DEC 30 2013;2013;We propose a single-particle source which emits into the helical edge;states of a two-dimensional quantum spin Hall insulator. Without;breaking time-reversal symmetry, this source acts like a pair of;noiseless single-electron emitters which each inject separately into a;chiral edge state. By locally breaking time-reversal symmetry, the;source becomes a proper single-particle emitter which exhibits shot;noise. Due to its intrinsic helicity, this system can be used to produce;time-bin entangled pairs of electrons in a controlled manner. The noise;created by the source contains information on the emitted wave packets;and is proportional to the concurrence of the emitted state.;Hofer, Patrick/O-1062-2013;Hofer, Patrick/0000-0001-6036-7291;7;0;0;0;7;1098-0121;WOS:000332164700003;;;J;Leon, C.;Latge, A.;Half-metallicity study of graphene nanoribbon bilayers under external;fields;PHYSICAL REVIEW B;88;24;245446;10.1103/PhysRevB.88.245446;DEC 30 2013;2013;Here we discuss the possibility of modulating energy gaps of graphene;nanoribbon bilayers, with zigzag edges, by applying electric fields. The;system is disposed in the Bernal configuration and is described by a;Hubbard Hamiltonian. We follow a Hartree-Fock mean-field theory to;calculate the electronic properties of the system. Under the action of a;transversal electric field, half-metallicity is found: One of the spin;bands increases the gap energy as the intensity of the field is;increased whereas the other decreases until achieving a null gap. For a;particular electric field range, the system exhibits metallic and;semiconducting features depending on the spin band. Half-metallicity is;enhanced due to an extra effect for the bilayer system: The presence of;a robust plateau-like in the gap versus field intensity diagram, for an;intermediate energy gap value of the semiconducting band. The;correlation of the gap plateau with local magnetizations and charge;numbers in the two layers is investigated. Further applied gate voltages;on the ribbons are considered to investigate the possibilities of;getting new physical responses for tilted electric field configurations.;Possible spintronic applications can be driven based on the differential;spin-band features achieved.;1;0;0;0;1;1098-0121;WOS:000332164700014;;;J;Lundgren, Rex;Fuji, Yohei;Furukawa, Shunsuke;Oshikawa, Masaki;Entanglement spectra between coupled Tomonaga-Luttinger liquids:;Applications to ladder systems and topological phases;PHYSICAL REVIEW B;88;24;245137;10.1103/PhysRevB.88.245137;DEC 30 2013;2013;We study the entanglement spectrum (ES) and entropy between two coupled;Tomonaga-Luttinger liquids (TLLs) on parallel periodic chains. This;problem gives access to the entanglement properties of various;interesting systems, such as spin ladders as well as two-dimensional;topological phases. By expanding interchain interactions to quadratic;order in bosonic fields, we are able to calculate the ES for both gapped;and gapless systems using only methods for free theories. In certain;gapless phases of coupled nonchiral TLLs, we interestingly find an ES;with a dispersion relation proportional to the square root of the;subsystem momentum, which we relate to a long-range interaction in the;entanglement Hamiltonian. We numerically demonstrate the emergence of;this unusual dispersion in a model of hard-core bosons on a ladder. In;gapped phases of coupled nonchiral TLLs, which are relevant to spin;ladders and topological insulators, we show that the ES consists of;linearly dispersing modes, which resembles the spectrum of a;single-chain TLL but is characterized by a modified TLL parameter. Based;on a calculation for coupled chiral TLLs, we are also able to provide a;very simple proof for the correspondence between the ES and the;edge-state spectrum in quantum Hall systems consistent with previous;numerical and analytical studies.;Oshikawa, Masaki/F-4992-2011; Furukawa, Shunsuke/E-4416-2013;Oshikawa, Masaki/0000-0002-7637-7432;;6;0;0;0;6;1098-0121;WOS:000332164700012;;;J;Moon, Pilkyung;Koshino, Mikito;Optical properties of the Hofstadter butterfly in the moire superlattice;PHYSICAL REVIEW B;88;24;241412;10.1103/PhysRevB.88.241412;DEC 30 2013;2013;We investigate the optical absorption spectrum and the selection rule;for the Hofstadter butterfly in twisted bilayer graphene under magnetic;fields. We demonstrate that the absorption spectrum exhibits a;self-similar recursive pattern reflecting the fractal nature of the;energy spectrum. We find that the optical selection rule has a nested;self-similar structure as well, and it is governed by the conservation;of the total angular momentum summed over different hierarchies.;Moon, Pilkyung/A-2930-2010;Moon, Pilkyung/0000-0003-3994-4255;2;0;0;0;2;1098-0121;WOS:000332164700005;;;J;Poirier, Mario;de Lafontaine, Mathieu;Bourbonnais, Claude;Pouget, Jean-Paul;Charge, spin, and lattice effects in the spin-Peierls ground state of;MEM(TCNQ)(2);PHYSICAL REVIEW B;88;24;UNSP 245134;10.1103/PhysRevB.88.245134;DEC 30 2013;2013;We report an investigation of charge, spin, and lattice effects in the;spin-Peierls state of the organic compound MEM(TCNQ)(2). The 16.5-GHz;dielectric function along the chain axis shows an enhancement below the;spin-Peierls transition temperature near 18 K consistent with the charge;coupling to the elastic strain involved in the transition. The velocity;of two elastic modes perpendicular to the chain axis presents anomalies;at the transition, which can be explained with a Landau free-energy;model including a linear-quadratic coupling energy term between the;appropriate elastic strain e and the spin-Peierls magnetic gap Delta(q).;The analysis of the dielectric and elastic features aims toward an order;parameter with an associated critical exponent beta similar to 0.36,;which is similar to the three-dimensional behavior seen in other;spin-Peierls materials. All these effects studied in a magnetic field up;to 18 Teslas appear also compatible with a mean-field model of a;quasi-one-dimensional spin-Peierls system.;0;0;0;0;0;1098-0121;WOS:000332164700009;;;J;Syzranov, S. V.;Rodionov, Ya. I.;Kugel, K. I.;Nori, F.;Strongly anisotropic Dirac quasiparticles in irradiated graphene;PHYSICAL REVIEW B;88;24;241112;10.1103/PhysRevB.88.241112;DEC 30 2013;2013;We study quasiparticle dynamics in graphene exposed to a linearly;polarized electromagnetic wave of very large intensity. We demonstrate;that low-energy transport in such system can be described by an;effective time-independent Hamiltonian, characterized by multiple Dirac;points in the first Brillouin zone. Around each Dirac point the spectrum;is anisotropic: the velocity along the polarization of the radiation;significantly exceeds the velocity in the perpendicular direction.;Moreover, in some of the points the transverse velocity oscillates as a;function of the radiation intensity. We find that the conductance of a;graphene p-n junction in the regime of strong irradiation depends on the;polarization as G(theta) proportional to vertical bar sin theta vertical;bar(3/2), where theta is the angle between the polarization and the p-n;interface, and oscillates as a function of the radiation intensity.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332164700001;;;J;Toke, Csaba;Particle-hole symmetry and bifurcating ground-state manifold in the;quantum Hall ferromagnetic states of multilayer graphene;PHYSICAL REVIEW B;88;24;241411;10.1103/PhysRevB.88.241411;DEC 30 2013;2013;The orbital structure of the quantum Hall ferromagnetic states in the;zero-energy Landau level in chiral multilayer graphene (AB, ABC, ABCA,;etc. stackings) is determined by the exchange interaction with all;levels, including deep-lying states in the Dirac sea. This exchange;field favors orbitally coherent states with a U(1) orbital symmetry if;the filling factor nu is not a multiple of the number of layers. If;electrons fill the orbital sector of a fixed spin/valley component to;one-half, e.g., at nu = +/- 3, +/- 1 in the bilayer and at nu = +/- 2,;+/- 6 in the ABCA four-layer, there is a transition to a Z(2) x U(1);manifold. For weak interaction, the structure in the zero-energy Landau;band compensates for the different exchange interaction on the;sublattices in the Landau orbitals; on the other side, the ground state;comes in two copies that distribute charge on the sublattices;differently. We expect a sequence of similar bifurcations in multilayers;of Bernal stacking.;1;1;0;0;1;1098-0121;WOS:000332164700004;;;J;Tonegawa, S.;Hashimoto, K.;Ikada, K.;Tsuruhara, Y.;Lin, Y. -H.;Shishido, H.;Haga, Y.;Matsuda, T. D.;Yamamoto, E.;Onuki, Y.;Ikeda, H.;Matsuda, Y.;Shibauchi, T.;Cyclotron resonance study of quasiparticle mass and scattering rate in;the hidden-order and superconducting phases of URu2Si2;PHYSICAL REVIEW B;88;24;245131;10.1103/PhysRevB.88.245131;DEC 30 2013;2013;The observation of cyclotron resonance in ultraclean crystals of URu2Si2;[S. Tonegawa et al., Phys. Rev. Lett. 109, 036401 (2012)] provides;another route besides quantum oscillations to the determination of the;bulk electronic structure in the hidden-order phase. We report detailed;analyses of the resonance lines, which fully resolve the cyclotron mass;structure of the main Fermi surface sheets. A particular focus is given;to the anomalous splitting of the sharpest resonance line near the [110];direction under in-plane magnetic-field rotation, which implies peculiar;electronic structure in the hidden-order phase. The results under the;field rotation from [110] toward [001] direction reveal that the;splitting is a robust feature against field tilting from the basal;plane. This is in sharp contrast to the reported frequency branch alpha;in the quantum oscillation experiments showing a three-fold splitting;that disappears by a small field tilt, which can be explained by the;magnetic breakdown between the large hole sphere and small electron;pockets. Our analysis of the cyclotron resonance profiles reveals that;the heavier branch of the split line has a larger scattering rate,;providing evidence for the existence of hot-spot regions along the [110];direction. These results are consistent with the broken fourfold;rotational symmetry in the hidden-order phase, which can modify the;interband scattering in an asymmetric manner. We also extend our;measurements down to 0.7 K, which results in the observation of;cyclotron resonance in the superconducting state, where novel effects of;vortex dynamics may enter. We find that the cyclotron mass undergoes no;change in the superconducting state. In contrast, the quasiparticle;scattering rate shows a rapid decrease below the vortex-lattice melting;transition temperature, which supports the formation of quasiparticle;Bloch state in the vortex lattice phase.;Hashimoto, Kenichiro/C-4925-2012; Shibauchi, Takasada/B-9349-2008;Shibauchi, Takasada/0000-0001-5831-4924;2;1;0;0;2;1098-0121;WOS:000332164700006;;;J;Wang, Chenjie;Levin, Michael;Weak symmetry breaking in two-dimensional topological insulators;PHYSICAL REVIEW B;88;24;245136;10.1103/PhysRevB.88.245136;DEC 30 2013;2013;We show that there exist two-dimensional (2D) time-reversal invariant;fractionalized insulators with the property that both their boundary;with the vacuum and their boundary with a topological insulator can be;fully gapped without breaking time-reversal or charge conservation;symmetry. This result leads us to an apparent paradox: we consider a;geometry in which a disklike region made up of a topological insulator;is surrounded by an annular strip of a fractionalized insulator, which;is, in turn, surrounded by the vacuum. If we gap both boundaries of the;strip, we naively obtain an example of a gapped interface between a;topological insulator and the vacuum that does not break any;symmetries-an impossibility. The resolution of this paradox is that this;system spontaneously breaks time-reversal symmetry in an unusual way,;which we call weak symmetry breaking. In particular, we find that the;only order parameters that are sensitive to the symmetry breaking are;nonlocal operators that describe quasiparticle tunneling processes;between the two edges of the strip; expectation values of local order;parameters vanish exponentially in the limit of a wide strip. Also, we;find that the symmetry breaking in our system comes with a ground-state;degeneracy, but this ground-state degeneracy is topologically protected,;rather than symmetry protected. We show that this kind of symmetry;breaking can also occur at the edge of 2D fractional topological;insulators.;Wang, Chenjie/G-8652-2013;2;0;0;0;2;1098-0121;WOS:000332164700011;;;J;Zhang, Qingyun;Cheng, Yingchun;Gan, Li-Yong;Schwingenschloegl, Udo;Giant valley drifts in uniaxially strained monolayer MoS2;PHYSICAL REVIEW B;88;24;245447;10.1103/PhysRevB.88.245447;DEC 30 2013;2013;Using first-principles calculations, we study the electronic structure;of monolayer MoS2 under uniaxial strain. We show that the energy valleys;drift far off the corners of the Brillouin zone (K points), about 12;times the amount observed in graphene. Therefore, it is essential to;take this effect into consideration for a correct identification of the;band gap. The system remains a direct band gap semiconductor up to 4%;uniaxial strain, while the size of the band gap decreases from 1.73 to;1.54 eV. We also demonstrate that the splitting of the valence bands due;to inversion symmetry breaking and spin-orbit coupling is not sensitive;to strain.;Cheng, Yingchun/C-8895-2011; Gan, Liyong/D-8113-2013;3;0;0;0;3;1098-0121;WOS:000332164700015;;;J;Zhang, Wentao;Smallwood, Christopher L.;Jozwiak, Chris;Miller, Tristan L.;Yoshida, Yoshiyuki;Eisaki, Hiroshi;Lee, Dung-Hai;Lanzara, Alessandra;Signatures of superconductivity and pseudogap formation in;nonequilibrium nodal quasiparticles revealed by ultrafast angle-resolved;photoemission;PHYSICAL REVIEW B;88;24;245132;10.1103/PhysRevB.88.245132;DEC 30 2013;2013;We use time- and angle-resolved photoemission to measure the nodal;nonequilibrium electronic states in various dopings of;Bi2Sr2CaCu2O8+delta. We find that the initial pump-induced transient;signal of these ungapped states is strongly affected by the onset of the;superconducting gap at T-c, superconducting pairing fluctuations at T-p,;and the pseudogap at T*. Moreover, T-p marks a suggestive threshold in;the fluence-dependent transient signal, with the appearance of a;critical fluence below T-p that corresponds to the energy required to;break apart all Cooper pairs. These results challenge the notion of a;nodal-antinodal dichotomy in cuprate superconductors by establishing a;link between nodal quasiparticles and the cuprate phase diagram.;ZHANG, Wentao/B-3626-2011;4;1;0;0;4;1098-0121;WOS:000332164700007;;;J;Svintsov, D.;Vyurkov, V.;Ryzhii, V.;Otsuji, T.;Hydrodynamic electron transport and nonlinear waves in graphene;PHYSICAL REVIEW B;88;24;245444;10.1103/PhysRevB.88.245444;DEC 27 2013;2013;We derive the system of hydrodynamic equations governing the collective;motion of massless fermions in graphene. The obtained equations;demonstrate the lack of Galilean and Lorentz invariance and contain a;variety of nonlinear terms due to the quasirelativistic nature of;carriers. Using these equations, we show the possibility of soliton;formation in an electron plasma of gated graphene. The quasirelativistic;effects set an upper limit for soliton amplitude, which marks graphene;out of conventional semiconductors. The mentioned noninvariance of the;equations is revealed in spectra of plasma waves in the presence of;steady flow, which no longer obey the Doppler shift. The feasibility of;plasma-wave excitation by direct current in graphene channels is also;discussed.;Svintsov, Dmitry/I-1755-2014;0;0;0;0;0;1098-0121;WOS:000332160400002;;;J;Yan, Jun;Norskov, Jens K.;Calculated formation and reaction energies of 3d transition metal oxides;using a hierachy of exchange-correlation functionals;PHYSICAL REVIEW B;88;24;245204;10.1103/PhysRevB.88.245204;DEC 27 2013;2013;The formation and oxidation reaction energies of 16 transition metal;oxides (TMOs) are benchmarked against experiments with an increasing;complexity of the exchange-correlation (xc) functionals: PBE, PBE + U;with a single U for each transition metal element, PBE0 (25% exact;exchange included), EXX (100% exact exchange), and EXX + RPA (random;phase approximation for the correlation energy). Although rather;challenging on standard CPU computing facilities, the RPA calculations;were performed efficiently on graphic processing units (GPUs). For the;formation energies, the PBE + U, PBE0, EXX + RPA improves significantly;over PBE with mean absolute errors (MAE) of 0.83 (PBE), 0.39 (PBE + U),;0.34 (PBE0), and 0.39 (EXX + RPA) eV per oxygen. In addition, EXX+ RPA;improves over the other xc functionals on the oxidation reaction;energies, with MAE of 0.27 (PBE), 0.28 (PBE + U), 0.30 (PBE0), to 0.13;(EXX + RPA) eV per oxygen. The distinct trend observed for the;calculated oxidation reaction energies compared to the formation;energies is due to that the errors in formation energies for PBE and;EXX+ RPA are systematic; while for PBE + U and PBE0 the deviations have;both signs, so that the error cancellations between different valence;states work better for PBE and EXX + RPA. Finally, we compared the;performance of the EXX + RPA for total energies and G(0)W(0), which uses;the random phase approximation in constructing the W kernel, for band;gaps, and discuss a few challenges for the EXX + RPA method on TMOs.;0;0;0;0;0;1098-0121;WOS:000332160400001;;;J;Bahamon, D. A.;Neto, A. H. Castro;Pereira, Vitor M.;Effective contact model for geometry-independent conductance;calculations in graphene;PHYSICAL REVIEW B;88;23;235433;10.1103/PhysRevB.88.235433;DEC 27 2013;2013;A geometry-independent effective model for the contact self-energies is;proposed to calculate the quantum conductance of patterned graphene;devices using Green's functions. A Corbino disk, being the simplest;device where the contacts cannot be modeled as semi-infinite ribbons, is;chosen to illustrate this approach. This system's symmetry allows an;analytical solution against which numerical calculations on the lattice;can be benchmarked. The effective model perfectly describes the;conductance of Corbino disks at low-to-moderate energies, and is robust;against the size of the annular device region, the number of atoms on;the edge, external magnetic fields, or electronic disorder. The contact;model considered here affords an expedient, flexible, and;geometry-agnostic approach that easily allows the consideration of;device dimensions encompassing several million atoms, and realistic;radial dimensions of a few hundreds of nanometers.;Bahamon, Dario/G-1369-2012; Pereira, Vitor/D-4088-2009; Castro Neto, Antonio/C-8363-2014;Bahamon, Dario/0000-0003-3852-2085; Castro Neto,;Antonio/0000-0003-0613-4010;0;0;0;0;0;1098-0121;WOS:000332159200003;;;J;Hermann, Andreas;Ashcroft, N. W.;Hoffmann, Roald;Isotopic differentiation and sublattice melting in dense dynamic ice;PHYSICAL REVIEW B;88;21;214113;10.1103/PhysRevB.88.214113;DEC 27 2013;2013;The isotopes of hydrogen provide a unique exploratory laboratory for;examining the role of zero point energy (ZPE) in determining the;structural and dynamic features of the crystalline ices of water. There;are two critical regions of high pressure: (i) near 1 TPa and (ii) near;the predicted onset of metallization at around 5 TPa. At the lower;pressure of the two, we see the expected small isotopic effects on phase;transitions. Near metallization, however, the effects are much greater,;leading to a situation where tritiated ice could skip almost entirely a;phase available to the other isotopomers. For the higher pressure ices,;we investigate in some detail the enthalpics of a dynamic proton;sublattice, with the corresponding structures being quite ionic. The;resistance toward diffusion of single protons in the ground state;structures of high-pressure H2O is found to be large, in fact to the;point that the ZPE reservoir cannot overcome these. However, the;barriers toward a three-dimensional coherent or concerted motion of;protons can be much lower, and the ensuing consequences are explored.;Hermann, Andreas/E-8687-2010;Hermann, Andreas/0000-0002-8971-3933;1;0;0;0;1;1098-0121;WOS:000332157500001;;;J;Higashi, Yoichi;Nagai, Yuki;Machida, Masahiko;Hayashi, Nobuhiko;Field-angle resolved flux-flow resistivity as a phase-sensitive probe of;unconventional Cooper pairing;PHYSICAL REVIEW B;88;22;224511;10.1103/PhysRevB.88.224511;DEC 27 2013;2013;We theoretically investigate the applied magnetic field-angle dependence;of the flux-flow resistivity rho(f)(alpha(M)) for a uniaxially;anisotropic Fermi surface. rho(f) is related to the quasiparticle;scattering rate inside a vortex core, which reflects the sign change in;the superconducting pair potential. We find that rho(f)(alpha(M)) is;sensitive to the sign change in the pair potential and has its maximum;when the magnetic field is parallel to the gap-node direction. We;propose the measurement of the field-angle dependent oscillation of;rho(f)(alpha(M)) as a phase-sensitive field-angle resolved experiment.;Nagai, Yuki/B-6698-2011;Nagai, Yuki/0000-0001-5098-5440;0;0;0;0;0;1098-0121;WOS:000332158300001;;;J;Karakonstantakis, G.;Liu, L.;Thomale, R.;Kivelson, S. A.;Correlations and renormalization of the electron-phonon coupling in the;honeycomb Hubbard ladder and superconductivity in polyacene;PHYSICAL REVIEW B;88;22;224512;10.1103/PhysRevB.88.224512;DEC 27 2013;2013;We have performed extensive density matrix renormalization group (DMRG);studies of the Hubbard model on a honeycomb ladder. The band structure;(with Hubbard U = 0) exhibits an unusual quadratic band touching at;half-filling, which is associated with a quantum Lifshitz transition;from a band insulator to a metal. For one electron per site, nonzero U;drives the system into an insulating state in which there is no;pair-binding between added electrons; this implies that;superconductivity driven directly by the repulsive electron-electron;interactions is unlikely in the regime of small doping, x << 1. However,;the divergent density of states as x -> 0, the large values of the;phonon frequencies, and an unusual correlation induced enhancement of;the electron-phonon coupling imply that lightly doped polyacenes, which;approximately realize this structure, are good candidates for;high-temperature electron-phonon driven superconductivity.;1;1;0;0;1;1098-0121;WOS:000332158300002;;;J;Koerbel, Sabine;Elsaesser, Christian;Alignment of ferroelectric polarization and defect complexes in;copper-doped potassium niobate;PHYSICAL REVIEW B;88;21;214114;10.1103/PhysRevB.88.214114;DEC 27 2013;2013;Defect complexes consisting of Cu substitutionals on Nb sites and oxygen;vacancies in potassium niobate, KNbO3, are investigated with respect to;their contribution to ferroelectric hardening by means of;density-functional theory and classical atomistic simulations. We;determine the easy and hard directions for the ferroelectric;polarization created by these defect complexes, the energy differences;between easy and hard directions, and upper limits for the energy;barriers for switching the ferroelectric polarization between these;directions. The ferroelectric polarization preferentially aligns with;the defect complexes, which is expected to impede polarization switching;and hence to contribute to ferroelectric hardening.;1;0;0;0;1;1098-0121;WOS:000332157500002;;;J;Steger, Mark;Liu, Gangqiang;Nelsen, Bryan;Gautham, Chitra;Snoke, David W.;Balili, Ryan;Pfeiffer, Loren;West, Ken;Long-range ballistic motion and coherent flow of long-lifetime;polaritons;PHYSICAL REVIEW B;88;23;235314;10.1103/PhysRevB.88.235314;DEC 27 2013;2013;Exciton polaritons can be created in semiconductor microcavities. These;quasiparticles act as weakly interacting bosons with very light mass, of;the order of 10(-4) times the vacuum electron mass. Many experiments;have shown effects which can be viewed as due to a Bose-Einstein;condensate, or quasicondensate, of these particles. The lifetime of the;particles in most of those experiments has been of the order of a few;picoseconds, leading to significant nonequilibrium effects. By;increasing the cavity quality, we have made samples with longer;polariton lifetimes. With a photon lifetime on the order of 100-200 ps,;polaritons in these structures can not only come closer to reaching true;thermal equilibrium, a desired feature for many researchers working in;this field, but they can also travel much longer distances. We observe;the polaritons to ballistically travel on the order of 1 mm, and at;higher densities we see transport of a coherent condensate, or;quasicondensate, over comparable distances. In this paper we report a;quantitative analysis of the flow of the polaritons both in a low-;density, classical regime, and in the coherent regime at higher density.;Our analysis gives us a measure of the intrinsic lifetime for photon;decay from the microcavity and a measure of the strength of interactions;of the polaritons.;0;0;0;0;0;1098-0121;WOS:000332159200002;;;J;Sun, Dan;Wu, W.;Grigera, S. A.;Perry, R. S.;Mackenzie, A. P.;Julian, S. R.;Pressure study of nematicity and quantum criticality in Sr3Ru2O7 for an;in- plane field;PHYSICAL REVIEW B;88;23;235129;10.1103/PhysRevB.88.235129;DEC 27 2013;2013;We study the relationship between the nematic phases of Sr3Ru2O7 and;quantum criticality. At ambient pressure, one nematic phase is;associated with a metamagnetic quantum critical end point (QCEP) when;the applied magnetic field is near the c axis. We show, however, that;this metamagnetic transition does not produce the same nematic;signatures when the QCEP is reached by hydrostatic pressure with the;field applied in the ab plane. Moreover, a second nematic phase, that is;seen for field applied in the ab plane close to, but not right at, a;second metamagnetic anomaly, persists with minimal change to the highest;applied pressure, 16.55 kbar. Taken together our results suggest that;metamagnetic quantum criticality may not be necessary for the formation;of a nematic phase in Sr3Ru2O7.;0;0;0;0;0;1098-0121;WOS:000332159200001;;;J;Wierzbicki, M.;Swirkowicz, R.;Barnas, J.;Giant spin thermoelectric efficiency in ferromagnetic graphene;nanoribbons with antidots;PHYSICAL REVIEW B;88;23;235434;10.1103/PhysRevB.88.235434;DEC 27 2013;2013;Thermoelectric effects in zigzag graphene nanoribbons with parallel;alignment of the edge spin polarizations are investigated theoretically.;Spin and charge thermopower, electrical and heat conductance, and charge;and spin thermoelectric efficiency are calculated numerically for;pristine nanoribbons as well as for nanoribbons with periodic;one-dimensional lattice of structural defects in the form of antidots.;It is shown that structural defects reduce thermal conductance due to;phonons and open gaps in the corresponding electronic spectrum. This, in;turn, leads to a significant enhancement of the Seebeck and spin Seebeck;coefficients as well as of the thermoelectric efficiency. A giant;enhancement appears in certain regions of chemical potential (controlled;by doping or external gate) and survives at room temperatures.;1;0;0;0;1;1098-0121;WOS:000332159200004;;;J;Apalkov, Vadym;Stockman, Mark I.;Metal nanofilm in strong ultrafast optical fields;PHYSICAL REVIEW B;88;24;245438;10.1103/PhysRevB.88.245438;DEC 26 2013;2013;We predict that a metal nanofilm subjected to an ultrashort (near-single;oscillation) optical pulse of a high field amplitude greater than or;similar to 3 V/A at normal incidence undergoes an ultrafast (at subcycle;times less than or similar to 1 fs) transition to a state resembling;semimetal. Its reflectivity is greatly reduced, while its transmissivity;and the optical field inside the metal are greatly increased. Despite;the metal being a centrosymmetric medium, the strong pulse causes net;charge transfer in the direction determined by the carrier envelope;phase (CEP) of the pulse, which is opposite to the direction of the;maximum field.;2;0;0;0;2;1098-0121;WOS:000331756500005;;;J;Brems, Steven;Liu, Haoliang;Temst, Kristiaan;Van Haesendonck, Chris;Rotation sense of the magnetization in the Co/CoO exchange-bias system;probed with anisotropic magnetoresistance measurements;PHYSICAL REVIEW B;88;21;214427;10.1103/PhysRevB.88.214427;DEC 26 2013;2013;The possibility of tracking the average rotation sense of the;magnetization vector of a ferromagnetic layer upon magnetization;reversal by means of magnetotransport measurements is explored. It is;demonstrated that the rotation sense of the ferromagnetic magnetization;vector during a hysteresis loop can be determined for the;polycrystalline Co/CoO exchange bias system by measuring the anisotropic;magnetoresistance (AMR) with a specific choice of the measurement;geometry. The AMR measurements reveal that the rotation direction of the;magnetization vector can be reversed by performing an in-plane;hysteresis loop with a magnetic field perpendicular to the cooling;field. This reversal can be directly linked to the experimental fact;that after training, i.e., after performing hysteresis loops with a;field along the cooling field direction, the average orientation of the;uncompensated magnetization of the granular CoO antiferromagnet can be;largely rotated back to the initial orientation after field cooling by;applying a perpendicular field with the appropriate amplitude and;orientation.;1;0;0;0;1;1098-0121;WOS:000331751200005;;;J;Cuadra, J.;Sarkar, D.;Vina, L.;Hvam, J. M.;Nalitov, A.;Solnyshkov, D.;Malpuech, G.;Polarized emission in polariton condensates: Switching in a;one-dimensional natural trap versus inversion in two dimensions;PHYSICAL REVIEW B;88;23;235312;10.1103/PhysRevB.88.235312;DEC 26 2013;2013;We perform polarization resolved spectroscopy of two-and one-dimensional;microcavity-polariton condensates, which are formed by exciting the;system in the optical parametric oscillator configuration. We observe;polarization inversion for linearly polarized pumping parallel to the;wire in both the 1D and 2D systems. As the polarization plane of the;pump is rotated, the degree of linear polarization of the 2D system;oscillates between orthogonal polarizations with the same period as that;of the pump. However, the 1D system switches abruptly between two states;of high degree of linear polarization with half the period. Two;complementary models, based on semiclassical Boltzmann kinetic equations;and the Gross-Pitaevskii equation, respectively, obtain an excellent;agreement with the experimental results, providing a deep insight into;the mechanisms responsible for the polarization switching.;Vina, Luis/E-9415-2012;Vina, Luis/0000-0002-6376-6703;0;0;0;0;0;1098-0121;WOS:000331754500006;;;J;Das, Subrat Kumar;Singh, Viveka Nand;Majumdar, Pinaki;Magnon spectrum in the domain ferromagnetic state of antisite-disordered;double perovskites;PHYSICAL REVIEW B;88;21;214428;10.1103/PhysRevB.88.214428;DEC 26 2013;2013;In their ideal structure, double perovskites such as Sr2FeMoO6 have;alternating Fe and Mo along each cubic axis, and a homogeneous;ferromagnetic metallic ground state. Imperfect annealing leads to the;formation of structural domains. The moments on mislocated Fe atoms that;adjoin each other across the domain boundary have an antiferromagnetic;coupling between them. This leads to a peculiar magnetic state, with;ferromagnetic domains coupled antiferromagnetically. At a short distance;the system exhibits ferromagnetic correlation while at large length;scales the net moment is strongly suppressed due to interdomain;cancellation. We provide a detailed description of the spin-wave;excitations of this complex magnetic state, obtained within a 1/S;expansion, for a progressively higher degree of mislocation, i.e.,;antisite disorder. At a given wave vector the magnons propagate at;multiple energies, related, crudely, to "domain confined" modes with;which they have a large overlap. We provide a qualitative understanding;of the trend observed with growing antisite disorder, and contrast these;results to the much broader spectrum that one obtains for uncorrelated;antisites.;0;0;0;0;0;1098-0121;WOS:000331751200006;;;J;Dugaev, V. K.;Katsnelson, M. I.;Edge scattering of electrons in graphene: Boltzmann equation approach to;the transport in graphene nanoribbons and nanodisks;PHYSICAL REVIEW B;88;23;235432;10.1103/PhysRevB.88.235432;DEC 26 2013;2013;We discuss the contribution of edge scattering to the conductance of;graphene nanoribbons and nanoflakes. Using different possible types of;the boundary conditions for the electron wave function at the edge, we;found dependences of the momentum relaxation time and conductance on the;geometric sizes and on the carrier density. We also consider the case of;ballistic nanoribbon and nanodisk, for which the edge scattering is the;main mechanism of momentum relaxation.;3;0;0;0;3;1098-0121;WOS:000331754500008;;;J;Fossati, Paul C. M.;Van Brutzel, Laurent;Chartier, Alain;Crocombette, Jean-Paul;Simulation of uranium dioxide polymorphs and their phase transitions;PHYSICAL REVIEW B;88;21;214112;10.1103/PhysRevB.88.214112;DEC 26 2013;2013;In this article first-principles DFT calculations and molecular dynamics;simulations using empirical potentials have been used to study four;different polymorphs of uranium dioxide that appear under high;compressive and tensile deformations. It has been found, as expected,;that the ground-state structure is the fluorite-type structure (space;group Fm (3) over barm). Under high compressive deformation urania;transforms into cotunnite-type structure (space group Pnma), as already;known experimentally. The calculated transition pressure is 28 GPa in;agreement with the experimental data. Under tensile deformation urania;transforms into either scrutinyite-type structure (space group Pbcn) or;rutile-type (space group P4(2)/mnm) structure. These two phases are;almost energetically degenerate; hence it is impossible to distinguish;which phase is the most favorable. The transition pressure for both;phases is found to be equal to -10 GPa. Subsequently, assessment of four;of the most used empirical potentials for UO2-Morelon, Arima, Basak, and;Yakub-have been carried out comparing the equations of state with those;found with DFT calculations. The Morelon potential has been found to be;the most accurate to describe the different urania polymorphs. Using;this empirical potential and a dedicated minimization procedure,;complete transition pathways between the ground state (Fm (3) over barm);and both tensile structures (Pbcn or P4(2)/mnm) are described. Finally,;uniaxial tensile load molecular dynamics simulations have been;performed. It has been found that for load in the  AU: ;FN Thomson Reuters Web of Science™;1.0;J;Bakr, M.;Souliou, S. M.;Blanco-Canosa, S.;Zegkinoglou, I.;Gretarsson, H.;Strempfer, J.;Loew, T.;Lin, C. T.;Liang, R.;Bonn, D. A.;Hardy, W. N.;Keimer, B.;Le Tacon, M.;Lattice dynamical signature of charge density wave formation in;underdoped YBa2Cu3O6+x;PHYSICAL REVIEW B;88;21;214517;10.1103/PhysRevB.88.214517;DEC 31 2013;2013;We report a detailed Raman scattering study of the lattice dynamics in;detwinned single crystals of the underdoped high-temperature;superconductor YBa2Cu3O6+x (x = 0.75, 0.6, 0.55, and 0.45). Whereas at;room temperature the phonon spectra of these compounds are similar to;that of optimally doped YBa2Cu3O6.99, additional Raman-active modes;appear upon cooling below similar to 170-200Kin underdoped crystals. The;temperature dependence of these new features indicates that they are;associated with the incommensurate charge density wave state recently;discovered using synchrotron x-ray scattering techniques on the same;single crystals. Raman scattering thus has the potential to explore the;evolution of this state under extreme conditions.;Zegkinoglou, Ioannis/H-2343-2013; Le Tacon, Mathieu/D-8023-2011;Le Tacon, Mathieu/0000-0002-5838-3724;6;0;0;0;6;1098-0121;WOS:000332165200002;;;J;Benedicto, Jessica;Centeno, Emmanuel;Polles, Remi;Moreau, Antoine;Ultimate resolution of indefinite metamaterial flat lenses;PHYSICAL REVIEW B;88;24;245138;10.1103/PhysRevB.88.245138;DEC 31 2013;2013;We propose an approach allowing a systematic optimization of lenses;based on hyperbolic metamaterials. The lensing properties of these;highly anisotropic materials are summed up in a complex effective index;extracted from the complex dispersion relation. The analytical;expression of this effective index in the homogenization regime or its;direct computation from the Bloch band diagram in the resonant regime;leads to hyperbolic metamaterials that outperform the state-of-art flat;lenses. We show that feasible metal-dielectric multilayers provide;superresolved images for visible light (around 400 nm) even when fully;taking absorption into account.;0;0;0;0;0;1098-0121;WOS:000332166700001;;;J;Biswas, P. K.;Amato, A.;Baines, C.;Khasanov, R.;Luetkens, H.;Lei, Hechang;Petrovic, C.;Morenzoni, E.;Low superfluid density and possible multigap superconductivity in the;BiS2-based layered superconductor Bi4O4S3;PHYSICAL REVIEW B;88;22;224515;10.1103/PhysRevB.88.224515;DEC 31 2013;2013;The magnetic penetration depth lambda as a function of temperature in;Bi4O4S3 was studied by muon-spin-spectroscopy measurements. The;superfluid density of Bi4O4S3 is found to be very low. The dependence of;lambda (2) on temperature possibly suggests the existence of two;s-wave-type energy gaps with the zero-temperature values of 0.93 (3) and;0.09 (4) meV. The upturn in the temperature dependence of the upper;critical field close to T-c further supports multigap superconductivity;in Bi4O4S3. The presence of two superconducting energy gaps is;consistent with theoretical and other experimental studies. However, a;single-gap s-wave model fit with a gap of 0.88 (2) meV cannot be ruled;out completely. The value of lambda(T) at T = 0 K is estimated to be;lambda(0) = 861 (17) nm, one of the largest of all known layered;superconductors, reflecting a very low superfluid density.;Luetkens, Hubertus/G-1831-2011;4;0;0;0;4;1098-0121;WOS:000332166200005;;;J;Cao, G.;Qi, T. F.;Li, L.;Terzic, J.;Cao, V. S.;Yuan, S. J.;Tovar, M.;Murthy, G.;Kaul, R. K.;Evolution of magnetism in the single-crystal honeycomb iridates;(Na1-xLix)(2)IrO3;PHYSICAL REVIEW B;88;22;220414;10.1103/PhysRevB.88.220414;DEC 31 2013;2013;We report the successful synthesis of single crystals of the layered;iridate (Na1-xLix)(2)IrO3, 0 <= x <= 0.9, and a thorough study of its;structural, magnetic, thermal, and transport properties. This compound;allows a controlled interpolation between Na2IrO3 and Li2IrO3, while;maintaining the quantum magnetism of the honeycomb Ir4+ planes. The;measured phase diagram demonstrates a suppression of the Neel;temperature T-N at an intermediate x, indicating that the magnetic;orders in Na2IrO3 and Li2IrO3 are distinct. X-ray data show that for x;approximate to 0.7, when T-N is suppressed the most, the honeycomb;structure is least distorted, leading to the speculation that at this;intermediate doping of the material is closest to the spin liquid that;has been sought after in Na2IrO3 and Li2IrO3. By analyzing our magnetic;data with a single-ion theoretical model we also show that the trigonal;splitting on the Ir4+ ions changes sign from Na2IrO3 to Li2IrO3.;8;0;0;0;8;1098-0121;WOS:000332166200001;;;J;Farr, Warrick G.;Creedon, Daniel L.;Goryachev, Maxim;Benmessai, Karim;Tobar, Michael E.;Ultrasensitive microwave spectroscopy of paramagnetic impurities in;sapphire crystals at millikelvin temperatures;PHYSICAL REVIEW B;88;22;224426;10.1103/PhysRevB.88.224426;DEC 31 2013;2013;Progress in the emerging field of engineered quantum systems requires;the development of devices that can act as quantum memories. The;realization of such devices by doping solid-state cavities with;paramagnetic ions imposes a tradeoff between ion concentration and;cavity coherence time. Here, we investigate an alternative approach;involving interactions between photons and naturally occurring impurity;ions in ultrapure crystalline microwave cavities exhibiting;exceptionally high quality factors. We implement a hybrid whispering;gallery/electron spin resonance method to perform rigorous spectroscopy;of an undoped single-crystal sapphire resonator over the frequency range;8-19 GHz, and at external applied DC magnetic fields up to 0.9 T.;Measurements of high-purity sapphire cooled close to 100 mK reveal the;presence of Fe3+, Cr3+, and V2+ impurities. A host of electron;transitions are measured and identified, including the two-photon;classically forbidden quadrupole transition (Delta m(s) = 2) for Fe3+,;as well as hyperfine transitions of V2+.;Tobar, Michael/C-9763-2009; Creedon, Daniel/A-8772-2010; Goryachev, Maxim/K-5851-2013;Creedon, Daniel/0000-0003-2912-3381; Goryachev,;Maxim/0000-0002-0257-4054;5;0;0;0;5;1098-0121;WOS:000332166200004;;;J;Joseph, B.;Bendele, M.;Simonelli, L.;Maugeri, L.;Pyon, S.;Kudo, K.;Nohara, M.;Mizokawa, T.;Saini, N. L.;Local structural displacements across the structural phase transition in;IrTe2: Order-disorder of dimers and role of Ir-Te correlations;PHYSICAL REVIEW B;88;22;224109;10.1103/PhysRevB.88.224109;DEC 31 2013;2013;We have studied local structure of IrTe2 by Ir L-3-edge extended x-ray;absorption fine structure (EXAFS) measurements as a function of;temperature to investigate origin of the observed structural phase;transition at T-s similar to 270 K. The EXAFS results show an appearance;of longer Ir-Te bond length (Delta R similar to 0.05 angstrom) at T <;T-s. We have found Ir-Ir dimerization, characterized by distinct Ir-Ir;bond lengths (Delta R similar to 0.13 angstrom), existing both above and;below T-s. The results suggest that the phase transition in IrTe2 should;be an order-disorder-like transition of Ir-Ir dimers assisted by Ir-Te;bond correlations, thus indicating important role of the interaction;between the Ir 5d and Te 5p orbitals in this transition.;KUDO, Kazutaka/B-1468-2011; NOHARA, Minoru/B-1476-2011;3;0;0;0;3;1098-0121;WOS:000332166200003;;;J;Kobayashi, Keita;Machida, Masahiko;Ota, Yukihiro;Nori, Franco;Massless collective excitations in frustrated multiband superconductors;PHYSICAL REVIEW B;88;22;224516;10.1103/PhysRevB.88.224516;DEC 31 2013;2013;We study collective excitations in three- and four-band superconductors;with interband frustration, which causes neither 0 nor pi interband;phases in the superconducting state. Using a low-energy spin Hamiltonian;originating from a multiband tight-binding model, we find that mass;reduction of a Leggett mode occurs in a wide parameter region of this;four-band system. As a limiting case, we have a massless Leggett mode.;This massless mode is related to the fact that the mean-field energy;does not depend on a relative phase of superconducting order parameters.;In other words, we find a link of the massless mode with a degeneracy;between a time-reversal-symmetry-breaking state (neither 0 nor pi;phases) and a time-reversal-symmetric state (either 0 or pi phases).;Therefore, the mass of collective modes characterizes well the;time-reversal symmetry in frustrated multiband superconductors.;Nori, Franco/B-1222-2009;Nori, Franco/0000-0003-3682-7432;2;0;0;0;2;1098-0121;WOS:000332166200006;;;J;Ohtsubo, Yoshiyuki;Yaji, Koichiro;Hatta, Shinichiro;Okuyama, Hiroshi;Aruga, Tetsuya;Two-dimensional states localized in subsurface layers of Ge(111);PHYSICAL REVIEW B;88;24;245310;10.1103/PhysRevB.88.245310;DEC 31 2013;2013;The origin of the two-dimensional surface states localized in subsurface;regions of the Ge(111) substrate has been studied by;density-functional-theory calculations, which were compared with the;experimental results of angle-resolved photoelectron spectroscopy. For;the Bi/Ge(111)-(root 3 x root 3)R30 degrees, Br/Ge(111)-(1x1), and;Tl/Ge(111)-(1x1) surfaces, we found that the surface states are;classified into three groups. The energy dispersion and the orbital;character for each band implies the relationship between the subsurface;states and the bulk heavy-hole, light-hole, and spin-orbit split-off;bands. These results indicate that the subsurface states originate from;the bulk bands that are perturbed due to the truncation of the;three-dimensional periodicity at the surface.;Okuyama, Hiroshi/H-7570-2014;1;0;0;0;1;1098-0121;WOS:000332166700002;;;J;Oiwake, M.;Ootsuki, D.;Noji, T.;Hatakeda, T.;Koike, Y.;Horio, M.;Fujimori, A.;Saini, N. L.;Mizokawa, T.;Electronic structure and phase separation of superconducting and;nonsuperconducting KxFe2-ySe2 revealed by x-ray photoemission;spectroscopy;PHYSICAL REVIEW B;88;22;224517;10.1103/PhysRevB.88.224517;DEC 31 2013;2013;We have investigated the electronic structure of superconducting (SC);and nonsuperconducting (non-SC) KxFe2-ySe2 using x-ray photoemission;spectroscopy (XPS). The spectral shape of the Fe 2p XPS is found to;depend on the amount of Fe vacancies. The Fe 2p(3/2) peak of the SC and;non-SC Fe-rich samples is accompanied by a shoulder structure on the;lower binding energy side, which can be attributed to the metallic phase;embedded in the Fe2+ insulating phase. The absence of the shoulder;structure in the non-SC Fe-poor sample allows us to analyze the Fe 2p;spectra using a FeSe4 cluster model. The Fe 3d-Se 4p charge-transfer;energy of the Fe2+ insulating phase is found to be similar to 2.3 eV;which is smaller than the Fe 3d-Fe 3d Coulomb interaction of similar to;3.5 eV. This indicates that the Fe2+ insulating state is the;charge-transfer type in the Zaanen-Sawatzky-Allen scheme. We also find a;substantial change in the valence-band XPS as a function of Fe content;and temperature. The metallic state at the Fermi level is seen in the SC;and non-SC Fe-rich samples and tends to be enhanced with cooling in the;SC sample.;0;0;0;0;0;1098-0121;WOS:000332166200007;;;J;Park, Keeseong;Nomura, Yusuke;Arita, Ryotaro;Llobet, Anna;Louca, Despina;Local strain and anharmonicity in the bonding of Bi2Se3-xTex topological;insulators;PHYSICAL REVIEW B;88;22;224108;10.1103/PhysRevB.88.224108;DEC 31 2013;2013;Using neutron diffraction and the pair density function analysis, the;local atomic structure of the three-dimensional Bi2Se3-xTex (x = 0, 1,;2, and 3) topological insulator is investigated. The substitution of Te;for Se in Bi2Se3-xTex (x = 0, 1, 2, and 3) is not random and its;preferred site is at the edges of the quintuple layer. This generates a;local strain due to the atom size mismatch between Se and Te. The site;preference is surprising given that the Bi to chalcogen bonds are;strongest when the ions are at the edges than in the middle layer. The;(Se/Te) atoms in the middle sublayer of the quintuple are coupled more;softly to the Bi atoms than those of the edges and have lower Debye;temperatures. This suggests that the atomic properties within the;quintuple layer are different than those at the edges. Additionally, the;results from band structure and density of state calculations are;reported to show the dependence of doping and temperature.;Arita, Ryotaro/D-5965-2012; Llobet, Anna/B-1672-2010;Arita, Ryotaro/0000-0001-5725-072X;;0;0;0;0;0;1098-0121;WOS:000332166200002;;;J;Pogorelov, Y. G.;Santos, M. C.;Loktev, V. M.;Impurity effects on electronic transport in ferropnictide;superconductors;PHYSICAL REVIEW B;88;22;224518;10.1103/PhysRevB.88.224518;DEC 31 2013;2013;Effects of impurities and disorder on transport properties by electronic;quasiparticles in superconducting iron pnictides are theoretically;considered. The most prominent new features compared to the case of pure;material should appear at high enough impurity concentration when a;specific narrow band of conducting quasiparticle states can develop;within the superconducting gap, around the position of localized;impurity level by a single impurity center. The predicted specific;threshold effects in the frequency-dependent optical conductivity and;temperature-dependent thermal conductivity and also in Seebeck and;Peltier coefficients can have interesting potentialities for practical;applications.;0;0;0;0;0;1098-0121;WOS:000332166200008;;;J;Reich, K. V.;Chen, T.;Efros, Al. L.;Shklovskii, B. I.;Photoluminescence in arrays of doped semiconductor nanocrystals;PHYSICAL REVIEW B;88;24;245311;10.1103/PhysRevB.88.245311;DEC 31 2013;2013;We study the dependence of the quantum yield of photoluminescence of a;dense, periodic array of semiconductor nanocrystals (NCs) on the level;of doping and NC size. Electrons introduced to NCs via doping quench;photoluminescence by the Auger process, so that practically only NCs;without electrons contribute to the photoluminescence. Computer;simulation and analytical theory are used to find a fraction of such;empty NCs as a function of the average number of donors per NC and NC;size. For an array of small spherical NCs, the quantization gap between;1S and 1P levels leads to transfer of electrons from NCs with large;number of donors to those without donors. As a result, empty NCs become;extinct, and photoluminescence is quenched abruptly at an average number;of donors per NC close to 1.8. The relative intensity of;photoluminescence is shown to correlate with the type of hopping;conductivity of an array of NCs.;2;0;0;0;2;1098-0121;WOS:000332166700003;;;J;Rousse, Gwenaelle;Rodriguez-Carvajal, Juan;Wurm, Calin;Masquelier, Christian;Spiral magnetic structure in the iron diarsenate LiFeAs2O7: A neutron;diffraction study;PHYSICAL REVIEW B;88;21;214433;10.1103/PhysRevB.88.214433;DEC 31 2013;2013;The magnetic structure of LiFeAs2O7 (monoclinic, space group C2) has;been solved using neutron powder diffraction. This compound presents an;antiferromagnetic behavior characterized by a long-range ordering;observed in the neutron diffraction patterns below the Neel temperature;(T-N = 35 K). The magnetic structure is found to be incommensurate with;respect to the nuclear structure, the magnetic peaks being indexed with;a propagation vector k = (0.709, 0, 0.155). The magnetic moments form a;general spiral (helical-cycloidal) arrangement with a constant magnetic;moment of 4.21 mu B. The magnetic structure is discussed in terms of;super-super exchange interactions involving two oxygen atoms belonging;to an AsO4 tetrahedron, and compared with the magnetic structure of the;di-phosphate analogue LiFeP2O7. The presence of triangular super-super;exchange paths is believed to be at the origin of this incommensurate;magnetic structure. The potential of LiFeAs2O7 as a possible;multiferroic material is discussed.;Rodriguez-Carvajal, Juan/C-4362-2008;Rodriguez-Carvajal, Juan/0000-0001-5582-2632;1;0;0;0;1;1098-0121;WOS:000332165200001;;;J;Smith, Peter M.;Kennett, Malcolm P.;Disorder effects on superconducting tendencies in the checkerboard;Hubbard model;PHYSICAL REVIEW B;88;21;214518;10.1103/PhysRevB.88.214518;DEC 31 2013;2013;The question of whether spatially inhomogeneous hopping in the two;dimensional Hubbard model can lead to enhancement of superconductivity;has been tackled by a number of authors in the context of the;checkerboard Hubbard model (CHM). We address the effects of disorder on;superconducting properties of the CHM by using exact diagonalization;calculations for both potential and hopping disorder. We characterize;the superconducting tendencies of the model by focusing on the;pair-binding energy, the spin gap, and d-wave pairing order parameter.;We find that superconducting tendencies, particularly the pair-binding;energy, are more robust to disorder when there is inhomogeneous hopping;than for the uniform Hubbard model. We also study all possible staggered;potentials for an eight-site CHM cluster and relate the behavior of;these configurations to the disordered system.;Kennett, Malcolm/I-2898-2012;1;0;0;0;1;1098-0121;WOS:000332165200003;;;J;Cortes-Huerto, R.;Sondon, T.;Saul, A.;Role of temperature in the formation and growth of gold monoatomic;chains: A molecular dynamics study;PHYSICAL REVIEW B;88;23;235438;10.1103/PhysRevB.88.235438;DEC 31 2013;2013;The effect of temperature on the formation and growth of monoatomic;chains is investigated by extensive molecular dynamics simulations using;a semiempirical potential based on the second-moment approximation to;the tight-binding Hamiltonian. Gold nanowires, with an aspect ratio of;similar to 13 and a cross section of similar to 1 nm(2), are stretched;at a rate of 3 m/s in the range of temperatures 5-600 K with 50 initial;configurations per temperature. A detailed study on the probability to;form monoatomic chains (MACs) is presented. Two domains are apparent in;our simulations: one at T < 100 K, where MACs develop from crystalline;disorder at the constriction, and the other at T > 100 K, where MACs;form as a consequence of plastic deformation of the nanowire. Our;results show that the average length of the formed MACs maximizes at T =;150 K, which is supported by simple energy arguments.;0;0;0;0;0;1098-0121;WOS:000332166400004;;;J;Despoja, V.;Loncaric, I.;Mowbray, D. J.;Marusic, L.;Quasiparticle spectra and excitons of organic molecules deposited on;substrates: G(0)W(0)-BSE approach applied to benzene on graphene and;metallic substrates;PHYSICAL REVIEW B;88;23;235437;10.1103/PhysRevB.88.235437;DEC 31 2013;2013;We present an alternative methodology for calculating the quasiparticle;energy, energy loss, and optical spectra of a molecule deposited on;graphene or a metallic substrate. To test the accuracy of the method it;is first applied to the isolated benzene (C6H6) molecule. The;quasiparticle energy levels and especially the energies of the benzene;excitons (triplet, singlet, optically active and inactive) are in very;good agreement with available experimental results. It is shown that the;vicinity of the various substrates [pristine/doped graphene or (jellium);metal surface] reduces the quasiparticle highest occupied molecular;orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap by an amount;that slightly depends on the substrate type. This is consistent with the;simple image theory predictions. It is even shown that the substrate;does not change the energy of the excitons in the isolated molecule. We;prove (in terms of simple image theory) that energies of the excitons;are indeed influenced by two mechanisms which cancel each other. We;demonstrate that the benzene singlet optically active (E-1u) exciton;couples to real electronic excitations in the substrate. This causes it;substantial decay, such as Gamma approximate to 174 meV for pristine;graphene and Gamma approximate to 362 meV for metal surfaces as the;substrate. However, we find that doping graphene does not influence the;E-1u exciton decay rate.;Mowbray, Duncan/A-5531-2010; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014; Loncaric, Ivor/J-6677-2014;Mowbray, Duncan/0000-0002-8520-0364; Loncaric, Ivor/0000-0002-5554-4641;2;0;0;0;2;1098-0121;WOS:000332166400003;;;J;Dutt, Prasenjit apq;Le Hur, Karyn;Strongly correlated thermoelectric transport beyond linear response;PHYSICAL REVIEW B;88;23;235133;10.1103/PhysRevB.88.235133;DEC 31 2013;2013;We investigate nonlinear thermoelectric transport through quantum;impurity systems with strong on-site interactions. We show that the;steady-state transport through interacting quantum impurities in contact;with electron reservoirs at significantly different temperatures can be;captured by an effective-equilibrium density matrix, expressed compactly;in terms of the Lippmann-Schwinger operators of the system. In addition,;the reservoirs can be maintained at arbitrary chemical potentials. The;interplay between the temperature gradient and bias voltage gives rise;to a nontrivial breaking of particle-hole symmetry in the strongly;correlated regime, manifest in the Abrikosov-Suhl localized electron;resonance. This purely many-body effect, which is in agreement with;experimental results, is beyond the purview of mean-field arguments.;2;0;0;0;2;1098-0121;WOS:000332166400001;;;J;Li, Yunpu;King, Jonathan P.;Reimer, Jeffrey A.;Meriles, Carlos A.;Near-band-gap photoinduced nuclear spin dynamics in semi-insulating;GaAs: Hyperfine- and quadrupolar-driven relaxation;PHYSICAL REVIEW B;88;23;235211;10.1103/PhysRevB.88.235211;DEC 31 2013;2013;Understanding and manipulating spin polarization and transport in the;vicinity of semiconductor-hosted defects is a problem of present;technological and fundamental importance. Here, we use high-field;magnetic resonance to monitor the relaxation dynamics of spin-3/2 nuclei;in semi-insulating GaAs. Our experiments benefit from the conditions;created in the limit of low illumination intensities, where intermittent;occupation of the defect site by photoexcited electrons leads to;electric field gradient fluctuations and concomitant spin relaxation of;the neighboring quadrupolar nuclei. We find indication of a;heterogeneous distribution of polarization, governed by different;classes of defects activated by either weak or strong laser excitation.;Upon application of a train of light pulses of variable repetition rate;and on/off ratio, we uncover an intriguing regime of mesoscale nuclear;spin diffusion restricted by long-range, nonuniform electric field;gradients. Given the slow time scale governing nuclear spin evolution,;such optically induced polarization patterns could be exploited as a;contrast mechanism to expose dark lattice defects or localized charges;with nanoscale resolution.;0;0;0;0;0;1098-0121;WOS:000332166400002;;;J;Adolff, Christian F.;Haenze, Max;Vogel, Andreas;Weigand, Markus;Martens, Michael;Meier, Guido;Self-organized state formation in magnonic vortex crystals;PHYSICAL REVIEW B;88;22;224425;10.1103/PhysRevB.88.224425;DEC 30 2013;2013;We study the polarization-state formation in magnonic vortex crystals;via scanning transmission x-ray microscopy. Self-organized state;formation is observed by adiabatic reduction of a high-frequency field;excitation. The emerging polarization patterns are shown to depend on;the frequency of excitation and the strength of the dipolar interaction;between the elements. In spite of the complexity of the investigated;system, global order caused by local interactions creates polarization;states with a high degree of symmetry. A fundamental dipole model and;coupled equations of motion are adopted to analytically describe the;experimental results. The emerging states can be predicted by a;fundamental stability criterion based on the excitability of eigenmodes;in the crystal. Micromagnetic simulations give additional insight into;the underlying processes.;2;0;0;0;2;1098-0121;WOS:000332162300008;;;J;Berridge, A. M.;Green, A. G.;Nonequilibrium conductivity at quantum critical points;PHYSICAL REVIEW B;88;22;220512;10.1103/PhysRevB.88.220512;DEC 30 2013;2013;Quantum criticality provides an important route to revealing universal;nonequilibrium behavior. A canonical example of a critical point is the;Bose-Hubbard model, which we study under the application of an electric;field. A Boltzmann transport formalism and is an element of expansion;are used to obtain the nonequilibrium conductivity and current noise.;This approach allows us to explicitly identify how a universal;nonequilibrium steady state is maintained, by identifying the;rate-limiting step in balancing Joule heating and dissipation to a heat;bath. It also reveals that the nonequilibrium distribution function is;very far from a thermal distribution.;1;0;0;0;1;1098-0121;WOS:000332162300004;;;J;Bojesen, Troels Arnfred;Babaev, Egor;Sudbo, Asle;Time reversal symmetry breakdown in normal and superconducting states in;frustrated three-band systems;PHYSICAL REVIEW B;88;22;220511;10.1103/PhysRevB.88.220511;DEC 30 2013;2013;We discuss the phase diagram and phase transitions in U(1) x Z(2);three-band superconductors with broken time reversal symmetry. We find;that beyond mean-field approximation and for sufficiently strong;frustration of interband interactions there appears an unusual metallic;state precursory to a superconducting phase transition. In that state,;the system is not superconducting. Nonetheless, it features a;spontaneously broken Z(2) time reversal symmetry. By contrast, for weak;frustration of interband coupling the energy of a domain wall between;different Z(2) states is low and thus fluctuations restore broken time;reversal symmetry in the superconducting state at low temperatures.;2;0;0;0;2;1098-0121;WOS:000332162300003;;;J;Gracia-Salgado, Rogelio;Garcia-Chocano, Victor M.;Torrent, Daniel;Sanchez-Dehesa, Jose;Negative mass density and rho-near-zero quasi-two-dimensional;metamaterials: Design and applications;PHYSICAL REVIEW B;88;22;224305;10.1103/PhysRevB.88.224305;DEC 30 2013;2013;We report the design and the characterization of artificial structures;made of periodical distributions of structured cylindrical scatterers;embedded in a two-dimensional (2D) waveguide. For certain values of;their geometrical parameters they show simultaneously negative effective;bulk modulus and negative effective mass density. Here our analysis is;focused on the frequencies where they behave like materials with;negative density or density near zero (DNZ). The scattering units;consist of a rigid cylindrical core surrounded by an anisotropic shell;divided in angular sectors. The units are embedded in a 2D waveguide;whose height is smaller than the length of the cylinders, which makes;the structure quasi-2D. We have obtained the dispersion relation of the;surface acoustic waves excited at frequencies with negative effective;density. Also, we report phenomena associated with their DNZ behavior,;such as tunneling through narrow channels, control of the radiation;field, perfect transmission through sharp corners, and power splitting.;Preliminary experiments performed on samples with millimeter-scale;dimensions demonstrated their single-negative behavior, with the main;drawback being the strong losses measured at the frequencies where the;negative behavior is observed.;sanchez-dehesa, jose/L-9726-2014;1;0;0;0;1;1098-0121;WOS:000332162300006;;;J;Klar, D.;Brena, B.;Herper, H. C.;Bhandary, S.;Weis, C.;Krumme, B.;Schmitz-Antoniak, C.;Sanyal, B.;Eriksson, O.;Wende, H.;Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to;ferromagnetic Co films;PHYSICAL REVIEW B;88;22;224424;10.1103/PhysRevB.88.224424;DEC 30 2013;2013;The coupling of submonolayer coverages of Fe-phthalocyanine molecules on;bare and oxygen-covered ferromagnetic Co(001) films was studied by;x-ray-absorption spectroscopy, especially the x-ray magnetic circular;dichroism, in combination with density functional theory. We observe;that the magnetic moments of the paramagnetic molecules are aligned even;at room temperature, resulting from a magnetic coupling to the;substrate. While the magnetization of the Fe ions directly adsorbed on;the Co surface is parallel to the magnetization of the Co film, the;introduction of an oxygen interlayer leads to an antiparallel alignment.;As confirmed by theory, the coupling strength is larger for the system;FePc/Co than for FePc/O/Co, causing a stronger temperature dependence of;the Fe magnetization for the latter system. Furthermore, the;calculations reveal that the coupling mechanism changes due to the O;layer from mostly direct exchange to Co of the bare surface to a 180;degrees antiferromagnetic superexchange via the O atoms. Finally, by;comparing the experimental x-ray-absorption spectra at the N K edge with;the corresponding calculations, the contribution of the individual;orbitals has been determined and the two inequivalent N atoms of the;molecules could be distinguished.;Wende, Heiko/J-8505-2012; Schmitz-Antoniak, Carolin/C-2234-2009;Schmitz-Antoniak, Carolin/0000-0002-8450-3515;3;0;0;0;3;1098-0121;WOS:000332162300007;;;J;Moor, Andreas;Volkov, Anatoly F.;Efetov, Konstantin B.;Time-dependent equation for the magnetic order parameter near the;quantum critical point in multiband superconductors with a spin-density;wave;PHYSICAL REVIEW B;88;22;224513;10.1103/PhysRevB.88.224513;DEC 30 2013;2013;Using a simple two-band model for Fe-based pnictides and the generalized;Eilenberger equation, we present a microscopic derivation of a;time-dependent equation for the amplitude of the spin-density wave near;the quantum critical point where it turns to zero. This equation;describes the dynamics of the magnetic (m), as well as the;superconducting order parameter (Delta). It is valid at low temperatures;T and small m (T, m << Delta) in a region of coexistence of both order;parameters, m and Delta. The boundary of this region is found in the;space of the nesting parameter {mu(0), mu(f)}, where mu(0) describes the;relative position of the electron and the hole pockets on the energy;scale and mu(phi) accounts for the ellipticity of the electron pocket.;At low T the number of quasiparticles is small due to the presence of;the energy gap Delta, and therefore the quasiparticles do not play a;role in the relaxation of m. This circumstance allows one to derive the;time-dependent equation for m in contrast to the case of conventional;superconductors for which the time-dependent Ginzburg-Landau equation;can be derived near T-c only in some special cases (high concentration;of paramagnetic impurities) [L. P. Gor'kov and G. M. Eliashberg, Sov.;Phys. JETP 27, 328 (1968)]. In the stationary case the derived equation;is valid at arbitrary temperatures. We find a solution of the stationary;equation which describes a domain wall in the magnetic structure. In the;center of the domain wall the superconducting order parameter has a;maximum, which means a local enhancement of superconductivity. Using the;derived time-dependent equation for m, we investgate also the stability;of a uniform commensurate spin-density wave (SDW) and obtain the values;of {mu(0), mu(f)} at which the first-order transition into the state;with m = 0 takes place or the transition to the state with an;inhomogeneous SDW occurs.;DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014;1;0;0;0;1;1098-0121;WOS:000332162300009;;;J;Singh, Yogesh;Tokiwa, Y.;Dong, J.;Gegenwart, P.;Spin liquid close to a quantum critical point in Na4Ir3O8;PHYSICAL REVIEW B;88;22;10.1103/PhysRevB.88.220413;DEC 30 2013;2013;Na4Ir3O8 is a candidate material for a three-dimensional quantum spin;liquid on the hyperkagome lattice. We present thermodynamic measurements;of heat capacity C and thermal conductivity kappa on high-quality;polycrystalline samples of Na4Ir3O8 down to T = 500 and 75 mK,;respectively. Absence of long-range magnetic order down to T = 75 mK;strongly supports claims of a spin-liquid ground state. The constant;magnetic susceptibility chi below T approximate to 25 K and the presence;of a small but finite linear-T term in C(T) suggest the presence of;gapless spin excitations. Additionally, the magnetic Gruneisen ratio;shows a divergence as T -> 0 K and a scaling behavior, which clearly;demonstrates that Na4Ir3O8 is situated close to a zero-field QCP.;Dong, Jinkui/J-3603-2013;2;0;0;0;2;1098-0121;WOS:000332162300002;;;J;Taen, Toshihiro;Ohtake, Fumiaki;Akiyama, Hiroki;Inoue, Hiroshi;Sun, Yue;Pyon, Sunseng;Tamegai, Tsuyoshi;Pair-breaking effects induced by 3-MeV proton irradiation in;Ba1-xKxFe2As2;PHYSICAL REVIEW B;88;22;224514;10.1103/PhysRevB.88.224514;DEC 30 2013;2013;Pair-breaking effects induced by 3-MeV proton irradiations are examined;in underdoped, optimally doped, and overdoped Ba1-xKxFe2As2 single;crystals in terms of suppression of the superconducting critical;temperature T-c. The small residual resistivity (RR) in as-grown;crystals shows the presence of negligible intrinsic scatterings, which;makes this material a model system for studying the effect of;artificially introduced scatterings. The RR and Tc change linearly with;the proton dose. As in the case of proton irradiation in Co-doped;BaFe2As2, we do not detect any low-temperature upturns in resistivity;attributable to magnetic scattering or localization. Regardless of K;doping levels, the critical value of the normalized scattering rate is;much higher than that expected in s(perpendicular to)-wave;superconductors.;悦, 孙/B-1373-2013;悦, 孙/0000-0002-5189-5460;3;0;0;0;3;1098-0121;WOS:000332162300010;;;J;Yan, Ming;Kakay, Attila;Andreas, Christian;Hertel, Riccardo;Spin-Cherenkov effect and magnonic Mach cones;PHYSICAL REVIEW B;88;22;220412;10.1103/PhysRevB.88.220412;DEC 30 2013;2013;We report on the Cherenkov-type excitation of spin waves (SWs) in;ferromagnets. Our micromagnetic simulations show that a localized;magnetic field pulse moving sufficiently fast along the surface of a;ferromagnet generates a SW boom, with a Mach-type cone of propagating;wave fronts. The SWs are formed when the velocity of the source exceeds;the propagation speed of SWs. Unlike the single cone of the usual;Cherenkov effect, we find that the magnetic Mach cone consists of two;wave fronts with different wave numbers. In patterned thin strips, this;magnetic analog of the Cherenkov effect should enable the excitation of;SWs with well-defined and velocity-dependent frequency. It thereby;provides a promising route towards tunable SW generation, with important;potential for applications in magnonic devices.;2;0;0;0;2;1098-0121;WOS:000332162300001;;;J;Yang, Lusann;Ceder, Gerbrand;Data-mined similarity function between material compositions;PHYSICAL REVIEW B;88;22;224107;10.1103/PhysRevB.88.224107;DEC 30 2013;2013;A new method for assessing the similarity of material compositions is;described. A similarity measure is important for the classification and;clustering of compositions. The similarity of the material compositions;is calculated utilizing a data-mined ionic substitutional similarity;based upon the probability with which two ions will substitute for each;other within the same structure prototype. The method is validated via;the prediction of crystal structure prototypes for oxides from the;Inorganic Crystal Structure Database, selecting the correct prototype;from a list of known prototypes within five guesses 75% of the time. It;performs particularly well on the quaternary oxides, selecting the;correct prototype from a list of known prototypes on the first guess 65%;of the time.;1;0;0;0;1;1098-0121;WOS:000332162300005;;;J;Bartelt, Norman C.;Nie, Shu;Starodub, Elena;Bernal-Villamil, Ivan;Gallego, Silvia;Vergara, Lucia;McCarty, Kevin F.;de la Figuera, Juan;Order-disorder phase transition on the (100) surface of magnetite;PHYSICAL REVIEW B;88;23;235436;10.1103/PhysRevB.88.235436;DEC 30 2013;2013;Using low-energy electron diffraction, we show that the room-temperature;(root 2 x root 2) R45 degrees reconstruction of Fe3O4(100) reversibly;disorders at similar to 450 degrees C. Short-range order persists above;the transition, suggesting that the transition is second order and;Ising-like. We interpret the transition in terms of a model in which;subsurface Fe3+ is replaced by Fe2+ as the temperature is raised. This;model reproduces the structure of antiphase boundaries previously;observed with scanning tunneling microscopy, as well as the continuous;nature of the transition. To account for the observed transition;temperature, the energy cost of each charge rearrangement is 82 meV.;de la Figuera, Juan/E-7046-2010; Gallego Queipo, Silvia/J-3411-2012;de la Figuera, Juan/0000-0002-7014-4777;;1;0;0;0;1;1098-0121;WOS:000332163500007;;;J;Cazorla, Claudio;Iniguez, Jorge;Insights into the phase diagram of bismuth ferrite from quasiharmonic;free-energy calculations;PHYSICAL REVIEW B;88;21;214430;10.1103/PhysRevB.88.214430;DEC 30 2013;2013;We have used first-principles methods to investigate the phase diagram;of multiferroic bismuth ferrite (BiFeO3 or BFO), revealing the energetic;and vibrational features that control the occurrence of various relevant;structures. More precisely, we have studied the relative stability of;four low-energy BFO polymorphs by computing their free energies within;the quasiharmonic approximation, introducing a practical scheme that;allows us to account for the main effects of spin disorder. As expected,;we find that the ferroelectric ground state of the material (with R3c;space group) transforms into an orthorhombic paraelectric phase (Pnma);upon heating. We show that this transition is not significantly affected;by magnetic disorder, and that the occurrence of the Pnma structure;relies on its being vibrationally (although not elastically) softer than;the R3c phase. We also investigate a representative member of the family;of nanotwinned polymorphs recently predicted for BFO [S. Prosandeev et;al., Adv. Funct. Mater. 23, 234 (2013)] and discuss their possible;stabilization at the boundaries separating the R3c and Pnma regions in;the corresponding pressure-temperature phase diagram. Finally, we;elucidate the intriguing case of the so-called supertetragonal phases of;BFO: Our results explain why such structures have never been observed in;the bulk material, despite their being stable polymorphs of very low;energy. Quantitative comparison with experiment is provided whenever;possible, and the relative importance of various physical effects;(zero-point motion, spin fluctuations, thermal expansion) and technical;features (employed exchange-correlation energy density functional) is;discussed. Our work attests the validity and usefulness of the;quasiharmonic scheme to investigate the phase diagram of this complex;oxide, and prospective applications are discussed.;Iniguez, Jorge/B-6856-2009;Iniguez, Jorge/0000-0001-6435-3604;0;0;0;0;0;1098-0121;WOS:000332161300005;;;J;Chandrasekaran, Anand;Damjanovic, Dragan;Setter, Nava;Marzari, Nicola;Defect ordering and defect-domain-wall interactions in PbTiO3: A;first-principles study;PHYSICAL REVIEW B;88;21;214116;10.1103/PhysRevB.88.214116;DEC 30 2013;2013;The properties of ferroelectric materials, such as lead zirconate;titanate (PZT), are heavily influenced by the interaction of defects;with domain walls. These defects are either intrinsic or are induced by;the addition of dopants. We study here PbTiO3 (the end member of a key;family of solid solutions) in the presence of acceptor (Fe) and donor;(Nb) dopants, and the interactions of the different defects and defect;associates with the domain walls. For the case of iron acceptors, the;calculations point to the formation of defect associates involving an;iron substitutional defect and a charged oxygen vacancy (Fe-Ti'-V-O '').;This associate exhibits a strong tendency to align in the direction of;the bulk polarization; in fact, ordering of defects is also observed in;pure PbTiO3 in the form of lead-oxygen divacancies. Conversely,;calculations on donor-doped PbTiO3 do not indicate the formation of;polar defect complexes involving donor substitutions. Last, it is;observed that both isolated defects in donor-doped materials and defect;associates in acceptor-doped materials are more stable at 180 degrees.;domain walls. However, polar defect complexes lead to asymmetric;potentials at domain walls due to the interaction of the defect;polarization with the bulk polarization. The relative pinning;characteristics of different defects are then compared, to develop an;understanding of defect-domain-wall interactions in both doped and pure;PbTiO3. These results may also help in understanding hardening and;softening mechanisms in PZT.;Damjanovic, Dragan/A-8231-2008;Damjanovic, Dragan/0000-0002-9596-7438;3;1;0;0;3;1098-0121;WOS:000332161300002;;;J;Choi, Minseok;Janotti, Anderson;Van de Walle, Chris G.;Native point defects in LaAlO3: A hybrid functional study;PHYSICAL REVIEW B;88;21;214117;10.1103/PhysRevB.88.214117;DEC 30 2013;2013;We investigate the electronic structure of defects in LaAlO3 (LAO) and;their effects on electronic properties of bulk and heterostructures. Our;calculations indicate that vacancies have lower formation energies than;interstitials and antisites. The La vacancy (V-La) and the Al vacancy;(V-Al) are deep acceptors, while the oxygen vacancy (VO) is a deep;donor. The impact of these defects on the performance of;metal-oxide-semiconductor devices is analyzed by placing the LAO band;edges and defect levels with respect to the band edges of GaN, InGaAs,;and Si. V-O introduces levels in the gap or in the vicinity of the;semiconductor conduction band, resulting in carrier traps and/or leakage;current through the gate oxide, while V-La and V-Al are sources of;negative fixed charges. We also discuss how oxygen vacancies in LAO can;influence the observed two-dimensional electron gas (2DEG) in;LaAlO3/SrTiO3 heterostructures. We conclude that V-O in the LAO layer;may provide electrons that fill compensating surface states, resulting;in higher 2DEG densities, at least for modest LAO layer thicknesses.;Van de Walle, Chris/A-6623-2012;Van de Walle, Chris/0000-0002-4212-5990;4;0;0;0;4;1098-0121;WOS:000332161300003;;;J;Haham, Noam;Konczykowski, Marcin;Kuiper, Bouwe;Koster, Gertjan;Klein, Lior;Testing dependence of anomalous Hall effect on resistivity in SrRuO3 by;its increase with electron irradiation;PHYSICAL REVIEW B;88;21;214431;10.1103/PhysRevB.88.214431;DEC 30 2013;2013;We measure the anomalous Hall effect (AHE) in several patterns of the;itinerant ferromagnet SrRuO3 before and after the patterns are;irradiated with electrons. The irradiation increases the resistivity of;the patterns due to the introduction of point defects and we find that;the AHE coefficient R-s scales with the total resistivity before and;after irradiation which indicates that the AHE is determined by the;total resistivity. We discuss possible origins of slight deviations from;scaling that are observed at low temperature, particularly below 70 K.;0;0;0;0;0;1098-0121;WOS:000332161300006;;;J;Heinhold, R.;Williams, G. T.;Cooil, S. P.;Evans, D. A.;Allen, M. W.;Influence of polarity and hydroxyl termination on the band bending at;ZnO surfaces;PHYSICAL REVIEW B;88;23;235315;10.1103/PhysRevB.88.235315;DEC 30 2013;2013;Surface sensitive synchrotron x-ray photoelectron spectroscopy (XPS) and;real-time in situ XPS were used to study the thermal stability of the;hydroxyl termination and downward band bending on the polar surfaces of;ZnO single crystals. On the O-polar face, the position of the Fermi;level could be reversibly cycled between the conduction band and the;band gap over an energetic distance of approximately 0.8 eV (similar to;1/4 of the band gap) by controlling the surface H coverage using simple;ultrahigh vacuum (UHV) heat treatments up to 750 degrees C, dosing with;H2O/H-2 and atmospheric exposure. A metallic to semiconductorlike;transition in the electronic nature of the O-polar face was observed at;an H coverage of approximately 0.9 monolayers. For H coverage less than;this, semiconducting (depleted) O-polar surfaces were created that were;reasonably stable in UHV conditions. In contrast, the downward band;bending on the Zn-polar face was significantly more resilient, and;depleted surfaces could not be prepared by heat treatment alone.;3;0;0;0;3;1098-0121;WOS:000332163500005;;;J;Levy, Peter M.;Yang, Hongxin;Chshiev, Mairbek;Fert, Albert;Spin Hall effect induced by Bi impurities in Cu: Skew scattering and;side-jump;PHYSICAL REVIEW B;88;21;214432;10.1103/PhysRevB.88.214432;DEC 30 2013;2013;The spin Hall effect (SHE) has recently turned out to be an interesting;tool for the conversion between charge and spin currents, the conversion;factor being characterized by the spin Hall angle Phi(H). Large spin;Hall angles have been now measured in heavy metals like W(Phi(H) =;-0.33) and Cu doped with Bi impurities (Phi(H) = -0.24). In this article;we express the contributions to the SHE induced by skew scattering and;scattering with side-jump from Bi impurities in Cu, and we use ab initio;calculations of the electronic structure of CuBi alloys to estimate the;values of these two contributions. The predominant effect comes from;skew scattering; the spin Hall angle is negative in agreement with;experiments, but the calculated amplitude is smaller.;Chshiev, Mairbek/A-9742-2008; Yang, HongXin/H-5719-2012;Chshiev, Mairbek/0000-0001-9232-7622;;0;0;0;0;0;1098-0121;WOS:000332161300007;;;J;Lu, Wenlai;Yang, Ping;Song, Wen Dong;Chow, Gan Moog;Chen, Jing Sheng;Control of oxygen octahedral rotations and physical properties in SrRuO3;films;PHYSICAL REVIEW B;88;21;214115;10.1103/PhysRevB.88.214115;DEC 30 2013;2013;Control of octahedral rotations in the ABO(3) perovskite oxides has been;of great interest due to its potential in rationally discovering and;designing new multifunctional phases. In this study, we show that;octahedral rotations of the SrRuO3 films can be controlled by oxygen;vacancies as well as by interfacial coupling, which further determines;the physical properties. Half-integer reflections using high-resolution;synchrotron x-ray diffraction were carried out to determine the;octahedral rotation pattern of SrRuO3 films on SrTiO3 substrates. The;transition of RuO6 rotation pattern accompanied by the structural change;from monoclinic P2(1)/m to tetragonal F4/mmc can be understood from the;preference of oxygen vacancies in the SrO atomic plane and the coupling;of octahedra across the interface between film and substrate. The field;angle dependence of magnetoresistance further confirmed the structural;phase transition with changes in octahedral rotations. The monoclinic;phase has the uniaxial magnetic easy axis 30 away from the [001];direction towards the [010] direction while the tetragonal phase has;uniaxial magnetic easy axis along the fourfold axis which is;perpendicular to the film surface. This study demonstrates the ability;to control the octahedral rotations in perovskite films and its;importance when designing thin films and multilayers with desired;functional property.;Chen, Jingsheng/D-9107-2011; Yang, Ping/C-5612-2008;1;0;0;0;1;1098-0121;WOS:000332161300001;;;J;Marcano, N.;Algarabel, P. A.;Rodriguez Fernandez, J.;Magen, C.;Morellon, L.;Singh, Niraj K.;Gschneidner, K. A., Jr.;Pecharsky, V. K.;Ibarra, M. R.;Effects of pressure on the magnetic-structural and Griffiths-like;transitions in Dy5Si3Ge;PHYSICAL REVIEW B;88;21;214429;10.1103/PhysRevB.88.214429;DEC 30 2013;2013;Magnetization studies have been performed on a polycrystalline sample of;Dy5Si3Ge as a function of an applied magnetic field (up to 50 kOe) and;hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range.;The anomalous behavior of the magnetic susceptibility indicates that a;Griffiths-like phase exists at low magnetic fields and pressures up to;10 kbar. We present evidence that the high-temperature second-order;ferromagnetic transition can be coupled with the low-temperature;first-order crystallographic transformation into a single first-order;magnetic-crystallographic transformation using a magnetic field and;hydrostatic pressure as tuning parameters. The effect of pressure on the;Griffiths-like phase is reported and analyzed in the framework of the;complex competition between the interslab and intraslab magnetic;interactions.;Magen, Cesar/A-2825-2013; Morellon, Luis/K-6922-2014; Marcano Aguado, Noelia/F-9446-2010;
7:15:1:22     Influence of structure defects on functional properties of magnetoresistance (Nd0.7Sr0.3)(1-x)Mn1+xO3 ceramics
DOI:10.1016/j.actamat.2014.02.014  JN:ACTA MATERIALIA  PY:2014
  TC:0  AU: Pashchenko, A. V.;Pashchenko, V. P.;Prokopenko, V. K.;Revenko, Yu. F.;Prylipko, Yu. S.;Ledenev, N. A.;Levchenko, G. G.;Dyakonov, V. P.;Szymczak, H.;
7:15:2:1     Influence of Fe segregation at grain boundaries on the magnetoresistance of Sr2Fe1+delta MoO6 polycrystals
DOI:10.1063/1.4757026  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:10  AU: Kumar, Nitu;Pandey, Vibhav;Gaur, Anurag;Kotnala, R. K.;
7:15:2:2     Increased low field magnetoresistance in electron doped system Sr0.4Ba1.6-xLaxFeMoO6
DOI:10.1063/1.3481085  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Pandey, Vibhav;Verma, Vivek;Bhalla, G. L.;Kotnala, R. K.;
7:15:2:3     Room temperature low field magnetoresistance in Sr2FeMoO6/ZnxFe1-xFe2O4 composites
DOI:10.1063/1.4817024  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Kumar, Nitu;Khurana, Geetika;Gaur, Anurag;Kotnala, R. K.;
7:15:2:4     Study of ferromagnetic-metal type Sr2FeMoO6 + xAg (x=0-10 wt%) composites
DOI:10.1016/j.jallcom.2013.01.071  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:3  AU: Kumar, Nitu;Aloysius, R. P.;Gaur, Anurag;Kotnala, R. K.;
7:15:2:5     Stable Fe deficient Sr2Fe1-delta MoO6 (0.0 <= delta <= 0.10) compound
DOI:10.1016/j.jallcom.2014.02.173  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Kumar, Nitu;Gaur, Anurag;Kotnala, R. K.;
7:15:2:6     Observation of superparamagnetism in ultra-fine ZnxFe1-xFe2O4 nanocrystals synthesized by co-precipitation method
DOI:10.1016/j.matchemphys.2012.03.069  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2012
  TC:4  AU: Kumar, Nitu;Khurana, Geetika;Gaur, Anurag;Kotnala, R. K.;
7:15:3:1     Doping Induced Spin State Transition in LaCoO3: Dynamical M ean-Field Study
DOI:10.1103/PhysRevLett.110.267204  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:5  AU: Augustinsky, P.;Krapek, V.;Kunes, J.;
7:15:3:2     Evolution of Magnetic Oxygen States in Sr-Doped LaCoO3
DOI:10.1103/PhysRevLett.109.157204  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:11  AU: Medling, S.;Lee, Y.;Zheng, H.;Mitchell, J. F.;Freeland, J. W.;Harmon, B. N.;Bridges, F.;
7:15:3:3     Double Exchange via t(2g) Orbitals and the Jahn-Teller Effect in Ferromagnetic La0.7Sr0.3CoO3 Probed by Epitaxial Strain
DOI:10.1103/PhysRevLett.111.257203  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:1  AU: Fuchs, D.;Merz, M.;Nagel, P.;Schneider, R.;Schuppler, S.;von Loehneysen, H.;
7:15:3:4     Rhombohedral distortion effects on electronic structure of LaCoO3
DOI:10.1063/1.4798350  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Lee, Y.;Harmon, B. N.;
7:15:4:1     Effects of 5d Ir-substitution on structures, transport and magnetic properties of Sr2FeMoO6
DOI:10.1016/j.ceramint.2012.12.103  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Wang, Jin-Feng;Li, Zheng;Zhang, Shan-Tao;Zhou, Jian;Gu, Zheng-Bin;Yao, Shu-Hua;Chen, Y. B.;Chen, Yan-Feng;
7:15:4:2     Temperature and composition dependence of crystal structures and magnetic and electronic properties of the double perovskites La2-xSrxCoIrO6 (0 <= x <= 2)
DOI:10.1103/PhysRevB.82.024403  JN:PHYSICAL REVIEW B  PY:2010
  TC:13  AU: Narayanan, N.;Mikhailova, D.;Senyshyn, A.;Trots, D. M.;Laskowski, R.;Blaha, P.;Schwarz, K.;Fuess, H.;Ehrenberg, H.;
7:15:4:3     Effect of oxygen substitution by nitrogen on magnetic and transport properties in Sr2FeMoO6 compound
DOI:10.1016/j.ceramint.2011.09.014  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:4  AU: Huo, Guoyan;Wen, Jingjuan;Zhang, Chenghui;Ren, Minghui;
7:15:4:4     Structural, electronic and magnetic properties of Mo (4d)-based complex perovskites Ba2MMoO6 (M=Cr and Fe)
DOI:10.1016/j.jmmm.2014.02.047  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:2  AU: Saad, H. -E. M. Musa;El-Hagary, M.;
7:15:4:5     The structures and positive magnetoresistance of metallic Sr2CrWO6 epitaxial thin film
DOI:10.1016/j.ceramint.2013.05.045  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:0  AU: Ji, Wei-jing;Xu, Jie;Jiao, Long;Wang, Jin-Feng;Gu, Zheng-Bin;Chen, Y. B.;Zhou, Jian;Yao, Shu-Hua;Zhang, Shan-Tao;
7:15:4:6     Anomalous transport effects for the metal and insulator doped La0.833K0.167MnO3 systems
DOI:10.1016/j.jmmm.2012.02.117  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Jian, Wu;
7:15:4:7     Influence of rare-earth ion doping on magnetotransport behavior of potassium doped manganites
DOI:10.1016/j.matchemphys.2013.10.033  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:3  AU: Lakshmi, Y. Kalyana;Manjunathrao, S.;Reddy, P. Venugopal;
7:15:5:1     Correlation between electrical properties and thermodynamic stability of ACoO(3-delta) perovskites (A = La, Pr, Nd, Sm, Gd)
DOI:10.1103/PhysRevB.84.085113  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Scherrer, Barbara;Harvey, Ashley S.;Tanasescu, Speranta;Teodorescu, Florina;Botea, Alina;Conder, Kazimierz;Grundy, A. Nicholas;Martynczuk, Julia;Gauckler, Ludwig J.;
7:15:5:2     Crystal-field interaction and oxygen stoichiometry effects in strontium-doped rare-earth cobaltates
DOI:10.1103/PhysRevB.90.064426  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Furrer, A.;Podlesnyak, A.;Frontzek, M.;Sashin, I.;Embs, J. P.;Mitberg, E.;Pomjakushina, E.;
7:15:5:3     Molten-salt-mediated synthesis and low-temperature electrical conduction of LnCoO(3) (Ln = Pr, Nd, Sm, and Gd)
DOI:10.1016/j.jallcom.2014.05.130  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:0  AU: Wang, Heng;Li, Guangshe;Li, Liping;
7:15:5:4     The Positive and Negative Magnetodielectric Effects in Double Perovskite Pr2CoMnO6
DOI:10.1111/jace.13009  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:4  AU: Wang, Liao Yu;Li, Qian;Gong, Yuan Yuan;Wang, Dun Hui;Cao, Qing Qi;Du, You Wei;
7:15:5:5     Cation size effect on the thermochromic properties of rare earth cobaltites RECoO3 (RE: La, Nd, Sm)
DOI:10.1063/1.4821884  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Capon, F.;Boileau, A.;Carteret, C.;Martin, N.;Boulet, P.;Pierson, J. F.;
7:15:6:1     Very large magnetoresistance and spin state transition in Ba-doped cobaltites
DOI:10.1063/1.4790316  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:6  AU: Troyanchuk, I. O.;Bushinsky, M. V.;Nikitin, A. V.;Lobanovsky, L. S.;Balagurov, A. M.;Sikolenko, V.;Efimov, V.;Sheptyakov, D. V.;
7:15:6:2     Possible Link of a Structurally Driven Spin Flip Transition and the Insulator-Metal Transition in the Perovskite La1-xBaxCoO3
DOI:10.1103/PhysRevLett.106.156407  JN:PHYSICAL REVIEW LETTERS  PY:2011
  TC:10  AU: Tong, Peng;Yu, Juan;Huang, Qingzhen;Yamada, Kazuyoshi;Louca, Despina;
7:15:6:3     Possible surface antiferromagnetism and no evidence for intergranular tunneling magnetoresistance in La0.5Sr0.5CoO3-delta cobaltites
DOI:10.1063/1.4838155  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Troyanchuk, I. O.;Bushinsky, M. V.;Lobanovsky, L. S.;
7:15:6:4     The ferromagnetic and antiferromagnetic phases in anion deficient La0.5-xPrxBa0.5CoO3-delta cobaltites
DOI:10.1063/1.4733953  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:8  AU: Troyanchuk, I. O.;Karpinsky, D. V.;Bushinsky, M. V.;Sikolenko, V.;Efimov, V.;Cervellino, A.;Raveau, B.;
7:15:6:5     Doping effects on the magnetic properties of La(0.5)Ba(0.5)Co(1-x)TixO(3)
DOI:10.1063/1.3561051  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: Zhang, Shile;Zhang, Yuheng;Pi, Li;Tan, Shun;
7:15:7:1     Composition dependent magnetism in novel triple perovskite Sr3MFeMoO9 (M=Mn, Co, Ni)
DOI:10.1016/j.ceramint.2014.01.096  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Wang, Jin-Feng;Bin Hu;Zhang, Ji;Gu, Zheng-Bin;Zhang, Shan-Tao;
7:15:7:2     Preparation by sol-gel and solid state reaction methods and properties investigation of double perovskite Sr2FeMoO6
DOI:10.1016/j.jeurceramsoc.2013.03.026  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2013
  TC:8  AU: Cernea, M.;Vasiliu, F.;Plapcianu, C.;Bartha, C.;Mercioniu, I.;Pasuk, I.;Lowndes, R.;Trusca, R.;Aldica, G. V.;Pintilie, L.;
7:15:7:3     Characterization of ferromagnetic double perovskite Sr2FeMoO6 prepared by various methods
DOI:10.1016/j.ceramint.2014.03.142  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:2  AU: Cernea, M.;Vasiliu, F.;Bartha, C.;Plapcianu, C.;Mercioniu, I.;
7:15:7:4     Cation order enhancement in Sr2FeMoO6 by water-saturated hydrogen reduction
DOI:10.1016/j.jeurceramsoc.2010.08.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Calleja, Alberto;Capdevila, Xavier G.;Segarra, Merce;Frontera, Carles;Espiell, Ferran;
7:15:7:5     Significant Processing Parameters for Sintered Density, Phase Development, and Microstructure Observation of Sr2FeMoO6
DOI:10.1111/j.1551-2916.2009.03449.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:2  AU: Yang, Chao-Wei;Fang, Tsang-Tse;
7:15:7:6     Does scandium resemble transition or rare earth metals when it is grown on silicon surfaces?
DOI:10.1063/1.4776714  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:1  AU: Shiu, H. W.;Chang, L. Y.;Lou, J. L.;Wu, C. P.;Chen, C. -H.;
7:15:8:1     Effect of carrier doping on the formation and collapse of magnetic polarons in lightly hole-doped La1-xSrxCoO3
DOI:10.1103/PhysRevB.83.134430  JN:PHYSICAL REVIEW B  PY:2011
  TC:11  AU: Podlesnyak, A.;Ehlers, G.;Frontzek, M.;Sefat, A. S.;Furrer, A.;Straessle, Th.;Pomjakushina, E.;Conder, K.;Demmel, F.;Khomskii, D. I.;
7:15:8:2     Spin-state responses to light impurity substitution in low-spin perovskite LaCoO3
DOI:10.1103/PhysRevB.87.224409  JN:PHYSICAL REVIEW B  PY:2013
  TC:1  AU: Tomiyasu, Keisuke;Kubota, Yuuki;Shimomura, Saya;Onodera, Mitsugi;Koyama, Syun-Ichi;Nojima, Tsutomu;Ishihara, Sumio;Nakao, Hironori;Murakami, Youichi;
7:15:8:3     Observation of a Griffiths-like phase in Ca-doped cobaltites
DOI:10.1063/1.4826632  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Zhou, S. M.;Li, Y.;Guo, Y. Q.;Zhao, J. Y.;Cai, X.;Shi, L.;
7:15:8:4     Magnetic-field effects on Jahn-Teller distortion in ferroelastic magnetic insulator Fe1-xMnxCr2O4
DOI:10.1063/1.3631751  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:2  AU: Sagayama, H.;Ohtani, S.;Saito, M.;Abe, N.;Taniguchi, K.;Arima, T.;
7:15:8:5     Nature of magnetoelastic coupling with the isovalent substitution at the B-site in LaCo1-yByO3
DOI:10.1103/PhysRevB.82.224101  JN:PHYSICAL REVIEW B  PY:2010
  TC:4  AU: Yu, J.;Kamazawa, K.;Louca, Despina;
7:15:9:1     Crystal field parameters with Wannier functions: Application to rare-earth aluminates
DOI:10.1103/PhysRevB.87.205139  JN:PHYSICAL REVIEW B  PY:2013
  TC:5  AU: Novak, P.;Knizek, K.;Kunes, J.;
7:15:9:2     Crystal field and magnetism with Wannier functions: Orthorhombic rare-earth manganites
DOI:10.1016/j.jmmm.2014.01.076  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:4  AU: Novak, P.;Nekvasil, V.;Knizek, K.;
7:15:9:3     Study of crystal-field excitations and Raman active phonons in o-DyMnO3
DOI:10.1016/j.jmmm.2010.12.031  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:4  AU: Jandl, S.;Mansouri, S.;Mukhin, A. A.;YuIvanov, V.;Balbashov, A.;Gospodino, M. M.;Nekvasil, V.;Orlita, M.;
7:15:9:4     Magnetism of perovskite cobaltites with Kramers rare-earth ions
DOI:10.1063/1.4862946  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Jirak, Z.;Hejtmanek, J.;Knizek, K.;Novak, P.;Santava, E.;Fujishiro, H.;
7:15:9:5     Crystal field of rare earth impurities in LaF3
DOI:10.1016/j.optmat.2014.07.001  JN:OPTICAL MATERIALS  PY:2014
  TC:2  AU: Novak, P.;Kunes, J.;Knizek, K.;
7:15:9:6     Magnetic properties and anisotropy of orthorhombic DyMnO3 single crystal
DOI:10.1016/j.jmmm.2013.01.036  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Pekala, M.;Wolff-Fabris, F.;Fagnard, J-F.;Vanderbemden, Ph.;Mucha, J.;Gospodinov, M. M.;Lovchinov, V.;Ausloos, M.;
7:15:10:1     Stabilization of the high-spin state of Co3+ in LaCo1-xRhxO3
DOI:10.1103/PhysRevB.85.134401  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Knizek, K.;Hejtmanek, J.;Marysko, M.;Jirak, Z.;Bursik, J.;
7:15:10:2     Magnetic and transport properties of the spin-state disordered oxide La0.8Sr0.2Co1-xRhxO3-delta
DOI:10.1103/PhysRevB.83.094405  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Shibasaki, Soichiro;Terasaki, Ichiro;Nishibori, Eiji;Sawa, Hiroshi;Lybeck, Jenni;Yamauchi, Hisao;Karppinen, Maarit;
7:15:10:3     Ga3+ substitution effects in the weak ferromagnetic oxide LaCo0.8Rh0.2O3
DOI:10.1103/PhysRevB.86.014421  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Asai, Shinichiro;Furuta, Noriyasu;Okazaki, Ryuji;Yasui, Yukio;Terasaki, Ichiro;
7:15:10:4     Structural and semiconductor-to-metal transitions of double-perovskite cobalt oxide Sr2-xLaxCoTiO6-delta with enhanced thermoelectric capability
DOI:10.1063/1.3623476  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:4  AU: Sugahara, Tohru;Ohtaki, Michitaka;
7:15:10:5     Unconventional magnetism in the layered oxide LaSrRhO4
DOI:10.1103/PhysRevB.90.144402  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Furuta, Noriyasu;Asai, Shinichiro;Igarashi, Taichi;Okazaki, Ryuji;Yasui, Yukio;Terasaki, Ichiro;Ikeda, Masami;Fujita, Takahito;Hagiwara, Masayuki;Kobayashi, Kensuke;Kumai, Reiji;Nakao, Hironori;Murakami, Youichi;
7:15:11:1     Competitive and Combining Effects of Grain Boundary and Fe/Mo Antisite Defects on the Low-Field Magnetoresistance in Sr2FeMoO6
DOI:10.1111/jace.12749  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Wang, Jin-Feng;Li, Zheng;Xu, Xi-Jun;Gu, Zheng-Bin;Yuan, Guo-Liang;Zhang, Shan-Tao;
7:15:11:2     Giant magnetoresistance and table-like magnetocaloric effect in double perovskite oxide PrSrMnCoO6
DOI:10.1063/1.3556716  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Mahato, Rabindra Nath;Sethupathi, K.;Sankaranarayanan, V.;Nirmala, R.;Nigam, A. K.;Malik, S. K.;
7:15:11:3     La-doping effects on structural, electronic and magnetic properties of Sa(2-x)La(x)CrMO(6) (M = Mo, Nb): LMTO-PLW plus (LSDA plus U) study
DOI:10.1016/j.matchemphys.2014.01.014  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2014
  TC:0  AU: Saad, H. -E. M. Musa;
7:15:11:4     Synthesis, magnetic and electrical transport properties of magnetoresistance material Sr2FeMoO6 by microwave sintering
DOI:10.1016/j.jmmm.2012.01.029  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:3  AU: Zhai, Yongqing;Qiao, Jing;Huo, Guoyan;Han, Shaoqiang;
7:15:11:5     Magnetic properties and magnetoresistance effect of Pb2FeMoO6
DOI:10.1063/1.4817584  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Yuan, Xueping;Xu, Mingxiang;Chen, Yanbin;
7:15:12:1     Spin-state transitions in PrCoO3 studied with neutron powder diffraction
DOI:10.1103/PhysRevB.84.214409  JN:PHYSICAL REVIEW B  PY:2011
  TC:4  AU: Ren, Y.;Yan, J. -Q.;Zhou, J. -S.;Goodenough, J. B.;Jorgensen, J. D.;Short, S.;Kim, H.;Proffen, Th.;Chang, S.;McQueeney, R. J.;
7:15:12:2     Spin-state transitions in PrCoO3 investigated by neutron scattering
DOI:10.1103/PhysRevB.84.132410  JN:PHYSICAL REVIEW B  PY:2011
  TC:3  AU: Yu, J.;Phelan, D.;Louca, Despina;
7:15:12:3     Spin-state transition in Ba2Co9O14
DOI:10.1103/PhysRevB.85.094424  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Cheng, J. -G.;Zhou, J. -S.;Hu, Z.;Suchomel, M. R.;Chin, Y. Y.;Kuo, C. Y.;Lin, H. -J.;Chen, J. M.;Pi, D. W.;Chen, C. T.;Takami, T.;Tjeng, L. H.;Goodenough, J. B.;
7:15:13:1     Acceleration of domain wall movement by photoirradiation in perovskite-type cobaltite
DOI:10.1103/PhysRevB.83.161101  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Okimoto, Y.;Kurashima, M.;Seko, K.;Ishikawa, T.;Onda, K.;Koshihara, S.;Kyomen, T.;Itoh, M.;
7:15:13:2     Interplay of 3d-4f exchange interaction in Pr0.5-xNdxSr0.5CoO3
DOI:10.1063/1.4798503  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Kumar, Pawan;Aparnadevi, M.;Mahendiran, R.;
7:15:14:1     An investigation of the Fe and Mo oxidation states in Sr2Fe2-xMoxO6 (0.25 <= x <= 1.0) double perovskites by X-ray absorption spectroscopy
DOI:10.1016/j.jallcom.2012.05.056  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2012
  TC:5  AU: Hayes, John R.;Grosvenor, Andrew P.;
7:15:14:2     The electronic and magnetic properties of Sr2MnNbO6, Sr2FeMoO6 and Sr2NiRuO6 double perovskites: An LSDA plus U plus SOC study
DOI:10.1016/j.jallcom.2010.07.029  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Yousif, Salah Eldin Ashamallah;Yassin, O. A.;
7:15:14:3     Diffraction and spectroscopic study of pyrochlores Bi2-xFe1+xSbO7
DOI:10.1016/j.jallcom.2013.11.226  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2014
  TC:2  AU: Zhou, Qingdi;Blanchard, Peter E. R.;Kennedy, Brendan J.;Ling, Chris D.;Liu, Samuel;Avdeev, Max;Aitken, Jade B.;Tadich, Anton;Brand, Helen E. A.;
7:15:15:1     Growth of Sr2FeMoO6 Based Tri-layer Structure for Room Temperature Magnetoresistive Applications
DOI:10.1080/10584587.2014.912088  JN:INTEGRATED FERROELECTRICS  PY:2014
  TC:0  AU: Kumar, Nitu;Misra, P.;Kotnala, R. K.;Gaur, Anurag;Katiyar, R. S.;
7:15:15:2     Polycrystalline Sr2FeMoO6 thin films on Si substrate by pulsed laser deposition for magnetoresistive applications
DOI:10.1016/j.matlet.2013.11.113  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Kumar, Nitu;Misra, P.;Kotnala, R. K.;Gaur, Anurag;Rawat, R.;Choudhary, R. J.;Katiyar, R. S.;
7:15:15:3     Optimization of deposition temperature and atmosphere for pulsed laser deposited Sr2FeMoO6 thin films
DOI:10.1016/j.tsf.2011.06.059  JN:THIN SOLID FILMS  PY:2011
  TC:5  AU: Paturi, P.;Metsanoja, M.;Huhtinen, H.;
7:16:1:1     Raman spectroscopy of piezoelectrics
DOI:10.1063/1.4803740  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Pezzotti, Giuseppe;
7:16:1:2     Raman tensor elements for wurtzitic GaN and their application to assess crystallographic orientation at film/substrate interfaces
DOI:10.1063/1.3606419  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:11  AU: Pezzotti, Giuseppe;Sueoka, Hiroyuki;Porporati, Alessandro Alan;Manghnani, Murli;Zhu, Wenliang;
7:16:1:3     Spectroscopic Assessments of Domain Texture in Barium Titanate: 1. Confocal Raman Polarization Analysis
DOI:10.1111/j.1551-2916.2009.03340.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:12  AU: Pezzotti, Giuseppe;Matsutani, Atsuo;Zhu, Wenliang;
7:16:1:4     Validating Raman spectroscopic calibrations of phonon deformation potentials in silicon single crystals: A comparison between ball-on-ring and micro-indentation methods
DOI:10.1063/1.3656447  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:10  AU: Miyatake, Takahiro;Pezzotti, Giuseppe;
7:16:1:5     Raman spectroscopic calibrations of phonon deformation potentials in wurtzitic AlN
DOI:10.1063/1.4768208  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Zhu, Wenliang;Leto, Andrea;Hashimoto, Ken-ya;Pezzotti, Giuseppe;
7:16:1:6     Raman analysis of three-dimensionally graded stress tensor components in sapphire
DOI:10.1063/1.3559871  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:7  AU: Zhu, Wenliang;Pezzotti, Giuseppe;
7:16:1:7     Ball-on-ring test in ceramic materials revisited by means of fluorescence piezospectroscopy
DOI:10.1016/j.jeurceramsoc.2011.05.009  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Porporati, Alessandro Alan;Miyatake, Takahiro;Schilcher, Kristina;Zhu, Wenliang;Pezzotti, Giuseppe;
7:16:1:8     Raman tensor analysis of ultra-high molecular weight polyethylene and its application to study retrieved hip joint components
DOI:10.1016/j.actbio.2010.02.051  JN:ACTA BIOMATERIALIA  PY:2010
  TC:19  AU: Takahashi, Yasuhito;Puppulin, Leonardo;Zhu, Wenliang;Pezzotti, Giuseppe;
7:16:1:9     Imaging of the Ferroelectric Domain Structures by Confocal Raman Spectroscopy
DOI:10.1080/00150193.2011.594774  JN:FERROELECTRICS  PY:2011
  TC:4  AU: Berth, Gerhard;Hahn, Wjatscheslaw;Wiedemeier, Volker;Zrenner, Artur;Sanna, Simone;Schmidt, Wolf Gero;
7:16:1:10     Structural and micromechanical analyses by polarized Raman spectroscopy of wurtzitic GaN films grown on (0001) sapphire substrates
DOI:10.1063/1.4751026  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Zhu, Wenliang;Park, Sungkyun;Okumura, Yuji;Leto, Andrea;Pezzotti, Giuseppe;
7:16:1:11     Evaluation of critical stress intensity for crack initiation and rising R-curve behavior in wurtzitic AlN film grown on (001)Si substrate
DOI:10.1016/j.tsf.2013.04.081  JN:THIN SOLID FILMS  PY:2013
  TC:2  AU: Zhu, Wenliang;Leto, Andrea;Hashimoto, Ken-ya;Pezzotti, Giuseppe;
7:16:1:12     Raman Tensor Analysis of Crystalline Lead Titanate by Quantitative Polarized Spectroscopy
DOI:10.1080/00150193.2014.890470  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Fujii, Y.;Noju, M.;Shimizu, T.;Taniguchi, H.;Itoh, M.;Nishio, I.;
7:16:1:13     Stress tensor dependence of the polarized Raman spectrum of tetragonal barium titanate
DOI:10.1063/1.3672833  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Pezzotti, Giuseppe;Okai, Keisuke;Zhu, Wenliang;
7:16:2:1     Growth and characterization of epitaxial (La2/3Sr1/3)MnO3 films by pulsed laser deposition
DOI:10.1016/j.ceramint.2011.06.009  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:13  AU: Liu, Dan;Liu, Wei;
7:16:2:2     Effects of the structural layer in MEMS substrates on mechanical and electrical properties of Pb(Zr0.52Ti0.48)O-3 films
DOI:10.1016/j.ceramint.2011.04.125  JN:CERAMICS INTERNATIONAL  PY:2011
  TC:7  AU: Liu, Dan;Zhou, Bo;Yoon, Sang H.;Wikle, Howard C., III;Wang, Yaqi;Park, Minseo;Prorok, Barton C.;Kim, Dong-Joo;
7:16:2:3     Effect of nitrogen concentration to the structural, chemical and electrical properties of tantalum zirconium nitride films
DOI:10.1016/j.ceramint.2011.11.079  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:5  AU: Tang, Z. Z.;
7:16:2:4     Determination of the True Young's Modulus of Pb(Zr0.52Ti0.48)O-3 Films by Nanoindentation: Effects of Film Orientation and Substrate
DOI:10.1111/j.1551-2916.2011.04867.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:8  AU: Liu, Dan;Zhou, Bo;Yoon, Sang H.;Kim, Seon-Bae;Ahn, Hosang;Prorok, Barton C.;Kim, Seung-Hyun;Kim, Dong-Joo;
7:16:2:5     Room temperature ultrahigh magnetoresistance nanostructure (La2/3Sr1/3)MnO3 films growth on SrTiO3 substrate
DOI:10.1016/j.ceramint.2011.10.017  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:8  AU: Liu, Dan;Liu, Wei;
7:16:2:6     A new paradigm in thin film indentation
DOI:10.1557/JMR.2010.0228  JN:JOURNAL OF MATERIALS RESEARCH  PY:2010
  TC:13  AU: Zhou, Bo;Prorok, Barton C.;
7:16:2:7     Properties of heavily W-doped TiO2 films deposited on Al2O3-deposited glass by simultaneous rf and dc magnetron sputtering
DOI:10.1016/j.ceramint.2013.05.126  JN:CERAMICS INTERNATIONAL  PY:2014
  TC:0  AU: Lin, Su-Shia;
7:16:2:8     Effects of the Ta content on the microstructure and electrical property of reactively sputtered TaxZr1-xN thin films
DOI:10.1016/j.tsf.2011.01.066  JN:THIN SOLID FILMS  PY:2011
  TC:3  AU: Ruan, Jian-Long;Huang, Jow-Lay;Lu, Horng-Hwa;Chen, J. S.;Lii, Ding-Fwu;
7:16:3:1     Evaluation on residual stress in Bi-3.15(Eu0.7Nd0.15)Ti3O12 polycrystalline ferroelectric thin film by using the orientation average method
DOI:10.1063/1.4769811  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:3  AU: Wei, Y.;Cheng, H. B.;Wang, X. Y.;Zheng, X. J.;
7:16:3:2     Effect of grain orientation in x-ray diffraction pattern on residual stress in polycrystalline ferroelectric thin film
DOI:10.1063/1.4748052  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:6  AU: Xu, L. H.;Jiang, D. D.;Zheng, X. J.;
7:16:3:3     Determination of residual stress in PZT films produced by laser ablation with X-ray diffraction and Raman spectroscopy
DOI:10.1016/j.jeurceramsoc.2009.09.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:13  AU: Rodrigues, S. A. S.;Rolo, A. G.;Khodorov, A.;Pereira, M.;Gomes, M. J. M.;
7:16:3:4     Residual stress of Pb(ZrxTi1-x)O-3 films with mixed textures
DOI:10.1016/j.jallcom.2010.06.170  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Wang, J. N.;Li, W. L.;Feng, B.;Liu, C. Q.;Li, X. L.;Sun, Q.;Fei, W. D.;
7:16:3:5     Microstress relaxation effect of Pb(Zr0.52Ti0.48)O-3 films with thicknesses for micro/nanopiezoelectric device
DOI:10.1063/1.3330897  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Lee, Jeong Hoon;Hwang, Kyo Seon;Kim, Tae Song;
7:16:3:6     Dependence of lattice distortion of monoclinic phase on film thickness in Pb(Zr0.58Ti0.42)O-3 thin films
DOI:10.1016/j.jallcom.2010.12.061  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:3  AU: Wang, J. N.;Wang, L. D.;Li, W. L.;Fei, W. D.;
7:16:3:7     Preparation and Ferroelectric Properties of Ho3+/Mo6+ Cosubstituted Bi4Ti3O12 Thin Films by Sol-Gel Method
DOI:10.1007/s11664-009-0976-z  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2010
  TC:5  AU: Fu, Chengju;Huang, Zhixiong;Li, Jie;Guo, Dongyun;
7:16:4:1     In situ Raman spectroscopy for characterization of the domain contributions to electrical and piezoelectric responses in Pb(Zr, Ti)O-3 films
DOI:10.1063/1.3502591  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:8  AU: Nakajima, Mitsumasa;Nakaki, Hiroshi;Ehara, Yoshitaka;Yamada, Tomoaki;Nishida, Ken;Yamamoto, Takashi;Osada, Minoru;Funakubo, Hiroshi;
7:16:4:2     Spontaneous polarization estimation from the soft mode in strain-free epitaxial polar axis-oriented Pb(Zr,Ti)O-3 thick films with tetragonal symmetry
DOI:10.1063/1.3575565  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:8  AU: Ehara, Yoshitaka;Utsugi, Satoru;Nakajima, Mitsumasa;Yamada, Tomoaki;Iijima, Takashi;Taniguchi, Hiroki;Itoh, Mitsuru;Funakubo, Hiroshi;
7:16:4:3     Impact of pulse poling on static and dynamic ferroelastic-domain contributions in tetragonal Pb( Ti, Zr)O-3 films determined by in-situ x-ray diffraction analysis
DOI:10.1063/1.4898321  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Nakajima, Mitsumasa;Wada, Ayumi;Yamada, Tomoaki;Ehara, Yoshitaka;Kobayashi, Takeshi;Funakubo, Hiroshi;
7:16:4:4     Enhancement of piezoelectric response in (100)/(001) oriented tetragonal Pb(Zr, Ti)O-3 films by controlling tetragonality and volume fraction of the (001) orientation
DOI:10.1063/1.3581190  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Nakajima, Mitsumasa;Okamoto, Syoji;Nakaki, Hiroshi;Yamada, Tomoaki;Funakubo, Hiroshi;
7:16:4:5     Noncontact probing method for estimation of ferroelectric properties of PbTiO3-based films for microelectromechanical systems
DOI:10.1557/jmr.2012.100  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:0  AU: Ehara, Yoshitaka;Utsugi, Satoru;Nakajima, Mitsumasa;Chentir, Mohamed-Tahar;Yamada, Tomoaki;Iijima, Takashi;Nishida, Ken;Yamamoto, Takashi;Funakubo, Hiroshi;
7:16:4:6     Spontaneous polarization estimation from the soft mode in strain-free epitaxial polar axis-oriented Pb(Zr,Ti)O-3 thick films with tetragonal symmetry (vol 98, 141914, 2011)
DOI:10.1063/1.3643039  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:0  AU: Ehara, Yoshitaka;Utsugi, Satoru;Nakajima, Mitsumasa;Yamada, Tomoaki;Iijima, Takashi;Taniguchi, Hiroki;Itoh, Mitsuru;Funakubota, Hiroshi;
7:16:4:7     Direct observation of intrinsic piezoelectricity of Pb(Zr,Ti)O-3 by time-resolved x-ray diffraction measurement using single-crystalline films
DOI:10.1063/1.4889803  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Fujisawa, Takashi;Ehara, Yoshitaka;Yasui, Shintaro;Kamo, Takafumi;Yamada, Tomoaki;Sakata, Osami;Funakubo, Hiroshi;
7:16:5:1     Materials synthesis and annealing-induced changes of microstructure and physical properties of one-dimensional perovskite-wurtzite oxide heterostructures
DOI:10.1016/j.apsusc.2013.06.134  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:2  AU: Liang, Yuan-Chang;Zhong, Hua;
7:16:5:2     Lateral parameter variations on the properties of La0.7Sr0.3MnO3 films prepared on Si (100) substrates by dc magnetron sputtering
DOI:10.1016/j.jallcom.2010.04.225  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:10  AU: Sahu, Dipti Ranjan;
7:16:5:3     Influence of annealing temperature on morphological and magnetic properties of La0.9Sr0.1MnO3
DOI:10.1016/j.apsusc.2011.06.126  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:7  AU: Shinde, K. P.;Pawar, S. S.;Pawar, S. H.;
7:16:5:4     Studies on morphological and magnetic properties of La1-xSrxMnO3
DOI:10.1016/j.apsusc.2012.04.052  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:3  AU: Shinde, K. P.;Pawar, S. S.;Shirage, P. M.;Pawar, S. H.;
7:16:5:5     Investigation on the coupling effect of thermochromism and microstructure on spectral properties of structured surfaces
DOI:10.1016/j.apsusc.2012.04.015  JN:APPLIED SURFACE SCIENCE  PY:2012
  TC:2  AU: Fang, Junfei;Xuan, Yimin;Li, Qiang;Fan, Desong;Huang, Jinguo;
7:16:5:6     Self-assembled antidots in La2/3Sr1/3MnO3 thin films
DOI:10.1016/j.jmmm.2009.05.031  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:3  AU: Konstantinovic, Z.;Balcells, Ll.;Martinez, B.;
7:16:6:1     Effect of sample size on intermetallic Al2Cu microstructure and orientation evolution during directional solidification
DOI:10.1016/j.jcrysgro.2014.02.023  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:0  AU: Gao, Ka;Li, Shuangming;Xu, Lei;Fu, Hengzhi;
7:16:6:2     Structure and electrical properties of AlN films prepared on PZT layers with different orientations
DOI:10.1016/j.jcrysgro.2013.09.052  JN:JOURNAL OF CRYSTAL GROWTH  PY:2014
  TC:1  AU: Meng, Xiangqin;Yang, Chengtao;Yang, Jiancang;
7:16:6:3     Application of differential thermal analysis to investigation of magnetic field effect on solidification of Al-Cu hypereutectic alloy
DOI:10.1016/j.jallcom.2010.06.056  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:8  AU: Li, Chuanjun;Yang, Hui;Ren, Zhongming;Ren, Weili;Wu, Yuqin;
7:16:6:4     Influence of plasma pressure on the growth characteristics and ferroelectric properties of sputter-deposited PZT thin films
DOI:10.1016/j.apsusc.2010.03.142  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:7  AU: Bose, A.;Maity, T.;Bysakh, S.;Seal, A.;Sen, Suchitra;
7:16:6:5     High resolution X-ray and electron microscopy characterization of PZT thin films prepared by RF magnetron sputtering
DOI:10.1016/j.apsusc.2014.05.184  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:2  AU: Maurya, K. K.;Halder, S. K.;Sen, Suchitra;Bose, Ankita;Bysakh, Sandip;
7:16:6:6     Characterization of RF Sputter-Deposited Ultra Thin PZT Films and Its Interface With Substrate
DOI:10.1080/10584587.2010.491726  JN:INTEGRATED FERROELECTRICS  PY:2010
  TC:2  AU: Bose, A.;Bysakh, Sandip;Mukherjee, M.;Islam, A. K. M. Maidul;Balamurugan, A. K.;Sen, Suchitra;
7:16:7:1     Influence of small cyclic and DC electrical loads on the fracture toughness of ferroelectric ceramics
DOI:10.1016/j.jeurceramsoc.2010.11.006  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:12  AU: Engert, Andrea R.;Neumeister, Peter;Mecklenburg, Matthias;Jelitto, Hans;Balke, Herbert;Schneider, Gerold A.;
7:16:7:2     Conducting crack propagation driven by electric fields in ferroelectric ceramics
DOI:10.1016/j.actamat.2013.07.050  JN:ACTA MATERIALIA  PY:2013
  TC:4  AU: Abdollahi, Amir;Arias, Irene;
7:16:7:3     Three-dimensional simulation of crack propagation in ferroelectric polycrystals: Effect of combined toughening mechanisms
DOI:10.1016/j.actamat.2013.11.016  JN:ACTA MATERIALIA  PY:2014
  TC:2  AU: Abdollahi, Amir;Arias, Irene;
7:16:7:4     The effect of strain and dead layer on the nonlinear electric-mechanical behavior of ferroelectric thin films
DOI:10.1016/j.commatsci.2013.04.062  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2013
  TC:0  AU: Zhang, Y. J.;Zheng, X. J.;Jiao, F.;Hu, H. P.;
7:16:7:5     Evaluation of electromechanical fracture behavior by configurational forces in cracked ferroelectric polycrystals
DOI:10.1016/j.commatsci.2011.01.050  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:8  AU: Li, Qun;Kuna, Meinhard;
7:16:7:6     Effective permittivity of air-filled cracks in piezoelectric ceramics due to crack bridging
DOI:10.1016/j.actamat.2012.10.006  JN:ACTA MATERIALIA  PY:2013
  TC:2  AU: Neumeister, Peter;Jurisch, Martin;Jelitto, Hans;Engert, Andrea R.;Schneider, Gerold A.;Balke, Herbert;
7:16:7:7     Phase-field model for dielectric breakdown in solids
DOI:10.1063/1.4862929  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Pitike, Krishna Chaitanya;Hong, Wei;
7:16:8:1     Characterization of Domains Reorientation in Multilayer Piezoelectric Ceramic Actuators by Polarized Raman Spectroscopy
DOI:10.1111/j.1551-2916.2012.05339.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:0  AU: Peng, Bin;Yue, Zhenxing;Meng, Siqin;Xi, Xiaoqing;Li, Longtu;
7:16:8:2     Investigation of the domain switching zone near a crack tip in pre-poled lead zirconate titanate ceramic via in situ X-ray diffraction
DOI:10.1016/j.scriptamat.2010.08.053  JN:SCRIPTA MATERIALIA  PY:2011
  TC:7  AU: Pojprapai (Imlao), Soodkhet;Jones, Jacob L.;Vodenitcharova, Tania;Bernier, Joel V.;Hoffman, Mark;
7:16:8:3     Temperature Dependence on Domain Switching Behavior in Lead Zirconate Titanate Under Electrical Load via In Situ Neutron Diffraction
DOI:10.1111/j.1551-2916.2011.04783.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Pojprapai, Soodkhet;Simons, Hugh;Studer, Andrew J.;Luo, Zhenhua;Hoffman, Mark;
7:16:8:4     Electrical Fatigue-Induced Cracking in Lead Zirconate Titanate Piezoelectric Ceramic and Its Influence Quantitatively Analyzed by Refatigue Method
DOI:10.1111/j.1551-2916.2012.05232.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Luo, Zhenhua;Pojprapai, Soodkhet;Glaum, Julia;Hoffman, Mark;
7:16:8:5     Investigation of Partial Discharge and Fracture Strength in Piezoelectric Ceramics
DOI:10.1111/jace.12875  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Hang, Tian;Glaum, Julia;Phung, Toan;Hoffman, Mark;
7:16:8:6     Dynamic processes of domain switching in lead zirconate titanate under cyclic mechanical loading by in situ neutron diffraction
DOI:10.1016/j.actamat.2009.11.026  JN:ACTA MATERIALIA  PY:2010
  TC:3  AU: Pojprapai(Imlao), Soodkhet;Luo, Zhenhua;Clausen, Bjorn;Vogel, Sven C.;Brown, Donald W.;Russel, Jennifer;Hoffman, Mark;
7:16:8:7     Enhancement of fatigue endurance in ferroelectric PZT ceramic by the addition of bismuth layered SBT
DOI:10.1063/1.4899237  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Namsar, O.;Pojprapai, S.;Watcharapasorn, A.;Jiansirisomboon, S.;
7:16:9:1     Raman spectroscopy for the investigation of indentation-induced domain texturing in lead zirconate titanate piezoceramics
DOI:10.1016/j.scriptamat.2010.04.040  JN:SCRIPTA MATERIALIA  PY:2010
  TC:9  AU: Deluca, Marco;Bermejo, Raul;Gruenbichler, Hannes;Presser, Volker;Danzer, Robert;Nickel, Klaus G.;
7:16:9:2     Field-induced domain switching in BaTiO3-based multilayer ceramic capacitors observed by polarized Raman spectroscopy
DOI:10.1007/s00339-012-7109-x  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:0  AU: Gao, Haigen;Yue, Zhenxing;Xi, Xiaoqing;Li, Longtu;
7:16:9:3     Fracture resistance of a doped PZT ceramic for multilayer piezoelectric actuators: Effect of mechanical load and temperature
DOI:10.1016/j.jeurceramsoc.2009.08.013  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Bermejo, Raul;Gruenbichler, Hannes;Kreith, Josef;Auer, Christoph;
7:16:9:4     Modelling of the ferroic material behaviour of piezoelectrics: Characterisation of temperature-sensitive functional properties
DOI:10.1016/j.jeurceramsoc.2009.04.033  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Gruenbichler, Hannes;Kreith, Josef;Bermejo, Raul;Supancic, Peter;Danzer, Robert;
7:16:9:5     A quick method to determine the capacitance characteristics of thin layer X5R multilayer capacitors
DOI:10.1016/j.jeurceramsoc.2011.08.003  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:2  AU: Mikkenie, R.;Steigelmann, O.;Groen, W. A.;ten Elshof, J. E.;
7:16:9:6     Study of the Factors Affecting the Mechanical, Electrical, and Piezoelectric Properties of PZT Micro-Actuator
DOI:10.1080/00150193.2013.837753  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Suaprasert, Puntipa;Aungkavattana, Pavadee;Bintachitt, Patamas;
7:16:10:1     Spherical solid He nanometer bubbles in an anisotropic complex oxide
DOI:10.1103/PhysRevB.82.104113  JN:PHYSICAL REVIEW B  PY:2010
  TC:11  AU: Ofan, Avishai;Gaathon, Ophir;Zhang, Lihua;Bakhru, Sasha;Bakhru, Hssaram;Zhu, Yimei;Welch, David;Osgood, Richard M., Jr.;
7:16:10:2     Twinning and dislocation pileups in heavily implanted LiNbO3
DOI:10.1103/PhysRevB.83.064104  JN:PHYSICAL REVIEW B  PY:2011
  TC:6  AU: Ofan, Avishai;Gaathon, Ophir;Zhang, Lihua;Evans-Lutterodt, Kenneth;Bakhru, Sasha;Bakhru, Hassaram;Zhu, Yimei;Welch, David;Osgood, Richard M., Jr.;
7:16:10:3     Nanoscale Strain Engineering on the Surface of a Bulk TiO2 Crystal
DOI:10.1021/n15024194  JN:NANO LETTERS  PY:2014
  TC:2  AU: Potapenko, Denis V.;Li, Zhisheng;Kysar, Jeffery W.;Osgood, Richard M.;
7:16:10:4     Spherical solid He nanometer bubbles in an anisotropic complex oxide (vol 82, 104113, 2010)
DOI:10.1103/PhysRevB.82.109901  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Ofan, Avishai;Zhang, Lihua;Gaathon, Ophir;Bakhru, Sasha;Bakhru, Hssaram;Zhu, Yimei;Welch, David;Osgood, Richard M., Jr.;
7:16:10:5     Planar single-crystal thin-films of YAG obtained by ion implantation and thermal exfoliation: Mechanical properties
DOI:10.1016/j.optmat.2012.06.009  JN:OPTICAL MATERIALS  PY:2012
  TC:0  AU: Gaathon, O.;Adam, J. D.;Krishnaswamy, S. V.;Kysar, J. W.;Bakhru, S.;Bakhru, H.;Welch, D. O.;Osgood, R. M., Jr.;
7:16:11:1     YAl3(BO3)(4): Crystal growth and characterization
DOI:10.1016/j.jcrysgro.2010.07.005  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:12  AU: Yu, Xuesong;Yue, Yinchao;Yao, Jiyong;Hu, Zhang-gui;
7:16:11:2     Tuning the morphology of lead zirconate titanate (PZT) nanostructures
DOI:10.1016/j.matlet.2014.03.142  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Glass, Christian;Ahmed, Waqqar;van Ruitenbeek, Jan;
7:16:11:3     Temperature anomalies of the laser stimulated elastooptical effect in PbZrO3 single crystals
DOI:10.1016/j.matlet.2012.06.063  JN:MATERIALS LETTERS  PY:2012
  TC:3  AU: Majchrowski, A.;Michalski, E.;Zmija, J.;Jaroszewicz, L. R.;Kityk, I. V.;
7:16:11:4     Ultraviolet vacuum ultraviolet optical functions for SrTiO3 and NdGaO3 crystals determined by spectroscopic ellipsometry
DOI:10.1063/1.4816624  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Dorywalski, K.;Andriyevsky, B.;Piasecki, M.;Lemee, N.;Patryn, A.;Cobet, C.;Esser, N.;
7:16:11:5     Quality of the rare earth aluminum borate crystals for laser applications, probed by high-resolution spectroscopy of the Yb3+ ion
DOI:10.1016/j.optmat.2012.05.021  JN:OPTICAL MATERIALS  PY:2012
  TC:3  AU: Boldyrev, K. N.;Popova, M. N.;Bettinelli, M.;Temerov, V. L.;Gudim, I. A.;Bezmaternykh, L. N.;Loiseau, P.;Aka, G.;Leonyuk, N. I.;
7:16:11:6     Laser-induced, second-order optical susceptibilities of YAB:Cr3+ single crystals
DOI:10.1080/14786435.2012.676214  JN:PHILOSOPHICAL MAGAZINE  PY:2012
  TC:1  AU: Majchrowski, A.;Cieslik, I.;Jaroszewicz, L. R.;Kityk, I. V.;
7:16:12:1     Investigation of fracture toughness of modified (KxNa1-x)NbO3 lead-free piezoelectric ceramics
DOI:10.1016/j.jeurceramsoc.2012.04.005  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2012
  TC:5  AU: Yilmaz, Ezgi D.;Mgbemere, Henry E.;Oezcoban, Hueseyin;Fernandes, Rodrigo P.;Schneider, Gerold A.;
7:16:12:2     Fracture toughness and corrosion behaviour of infiltrated Al2O3IP) - Steel composites
DOI:10.1016/j.msea.2013.10.007  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2014
  TC:1  AU: Schlenther, E.;Oezcoban, H.;Jelitto, H.;Faller, M.;Schneider, G. A.;Graule, T.;Aneziris, C. G.;Kuebler, J.;
7:16:12:3     Influence of finite notch root radius and optically determined crack length on the measured fracture toughness of brittle materials
DOI:10.1016/j.jeurceramsoc.2010.01.022  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Oezcoban, Hueseyin;Jelitto, Hans;Schneider, Gerold A.;
7:16:12:4     Influence of microstructural features on the impact toughness of infiltrated Al(2)O(3 vertical bar)p-steel composites
DOI:10.1016/j.msea.2012.07.060  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2012
  TC:1  AU: Schlenther, E.;Aneziris, C. G.;Graule, T.;Kuebler, J.;
7:16:12:5     X-ray analysis of phase coexistence and electric poling processing in alkaline niobate-based compositions
DOI:10.1016/j.jallcom.2009.12.052  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2010
  TC:5  AU: Fu, Jian;Zuo, Ruzhong;Liu, Yi;
7:16:13:1     Mechanism of hydrothermal growth of ferroelectric PZT nanowires
DOI:10.1016/j.jcrysgro.2012.03.022  JN:JOURNAL OF CRYSTAL GROWTH  PY:2012
  TC:5  AU: Wang, Jin;Durussel, Alexandre;Sandu, Cosmin Silviu;Sahini, Mtabazi Geofrey;He, Zhangbing;Setter, Nava;
7:16:13:2     Structure Determination and Compositional Modification of Body-Centered Tetragonal PX-Phase Lead Titanate
DOI:10.1021/cm1030206  JN:CHEMISTRY OF MATERIALS  PY:2011
  TC:4  AU: Wang, Jin;Schenk, Kurt;Carvalho, Alexandra;Wylie-van Eerd, Ben;Trodahl, Joe;Sandu, Cosmin S.;Bonin, Michel;Gregora, Ivan;He, Zhanbing;Yamada, Tomoaki;Funakubo, Hiroshi;Briddon, Patrick R.;Setter, Nava;
7:16:13:3     Synchrotron X-ray diffraction study on a single nanowire of PX-phase lead titanate
DOI:10.1016/j.jeurceramsoc.2010.07.014  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:4  AU: Yamada, Tomoaki;Wang, Jin;Sakata, Osami;Sandu, Cosmin S.;He, Zhanbing;Kamo, Takafumi;Yasui, Shintaro;Setter, Nava;Funakubo, Hiroshi;
7:16:13:4     Analysis of composition homogeneity and polarization orientation of PZT submicron fibers by micro-Raman spectroscopy
DOI:10.1016/j.jeurceramsoc.2014.02.030  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:0  AU: Wang, Jin;Trodahl, Joe;Sandu, Cosmin;Gregora, Ivan;Setter, Nava;
7:16:13:5     Microwave-hydrothermal synthesis and structural characterization of PX-phase single-crystalline PbTiO3 nanowires by electron microscopy
DOI:10.1016/j.matlet.2009.11.054  JN:MATERIALS LETTERS  PY:2010
  TC:5  AU: Zhu, Xinhua;Xing, Zhibiao;Zhang, Zhenghai;Zhu, Jianmin;Song, Ye;Zhou, Shunhua;Liu, Zhiguo;
7:16:14:1     Characterization of Er3+ and Nd3+ doped Strontium Barium Niobate glass ceramic as temperature sensors
DOI:10.1016/j.optmat.2010.11.026  JN:OPTICAL MATERIALS  PY:2011
  TC:31  AU: Haro-Gonzalez, P.;Martin, I. R.;Martin, L. L.;Leon-Luis, Sergio F.;Perez-Rodriguez, C.;Lavin, V.;MALTA Consolider Team;
7:16:14:2     Waveguide and Raman spectroscopic visualization in C-implanted Ca0.20Ba0.80Nb2O6 crystal
DOI:10.1364/OME.4.000864  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:2  AU: Zhao, Jin-Hua;Zhang, Lian;Wang, Xue-Lin;
7:16:14:3     Micro-Raman spectroscopic visualization of lattice vibrations and strain in He+ - implanted single-crystal LiNbO3
DOI:10.1364/OME.4.000338  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:4  AU: Huang, Hsu-Cheng;Dadap, Jerry I.;Herman, Irving P.;Bakhru, Hassaram;Osgood, Richard M., Jr.;
7:16:14:4     Fabrication and Characterization of Silicon Microchannel Plates as Temperature-Sensing Materials
DOI:10.1007/s11664-011-1758-y  JN:JOURNAL OF ELECTRONIC MATERIALS  PY:2011
  TC:0  AU: Ci, Pengliang;Shi, Jing;Wang, Fei;Xu, Shaohui;Yang, Zhenya;Yang, Pingxiong;Wang, Lianwei;Chu, Paul K.;
7:16:14:5     1 x 4-Branch waveguide power splitters in lithium niobate by means of multi-energy O ion implantation
DOI:10.1016/j.optmat.2010.05.016  JN:OPTICAL MATERIALS  PY:2010
  TC:6  AU: Zhao, Jin-Hua;Wang, Xue-Lin;Chen, Feng;
7:16:15:1     Influence of processing parameters on the growth characteristics and ferroelectric properties of sputtered PZT thin films on stainless steel substrates
DOI:10.1016/j.apsusc.2013.05.103  JN:APPLIED SURFACE SCIENCE  PY:2013
  TC:4  AU: Bose, Ankita;Sreemany, Monjoy;Bysakh, Sandip;
7:16:15:2     Reproducibility and Ferroelectric Fatigue of Lead Zirconate Titanate Thin Films Deposited Directly on Copper Via a Composite Gel Architecture
DOI:10.1111/j.1551-2916.2010.04176.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:3  AU: Losego, Mark D.;Maria, Jon-Paul;
7:16:15:3     Switching-induced charge injection inducing fatigue in lead zirconate titanium thin films
DOI:10.1016/j.ceramint.2011.10.021  JN:CERAMICS INTERNATIONAL  PY:2012
  TC:1  AU: Wu, Jiagang;Xiao, Dingquan;Zhu, Jianguo;
7:16:15:4     Role of TiO2 Seed Layer Thickness on the Nanostructure Evolution and Phase Transformation Behavior of Sputtered PZT Thin Films During Post-Deposition Air-Annealing
DOI:10.1111/j.1551-2916.2011.04684.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Bose, Ankita;Sreemany, Monjoy;Bysakh, Sandip;
7:16:15:5     Influence of processing conditions on the structure, composition and ferroelectric properties of sputtered PZT thin films on Ti-substrates
DOI:10.1016/j.apsusc.2013.11.041  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:2  AU: Bose, Ankita;Sreemany, Monjoy;
7:16:16:1     mu-Raman spectroscopy characterization of LiNbO3 femtosecond laser written waveguides
DOI:10.1063/1.4769869  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Tejerina, M. R.;Jaque, D.;Torchia, G. A.;
7:16:16:2     MATFESA: strain and refractive index field estimation after femtosecond laser interaction with transparent material
DOI:10.1007/s00339-012-7132-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:2  AU: Tejerina, M.;Torchia, G. A.;
7:16:16:3     Computation of the expansion parameters of femto-waveguides using a two dimensional mu-Raman map and guided modes
DOI:10.1063/1.4825224  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Tejerina, M. R.;Torchia, G. A.;
7:16:16:4     A 2D mu-Raman analysis of low repetition rate femto-waveguides in lithium niobate by using a finite element model
DOI:10.1016/j.optmat.2013.12.040  JN:OPTICAL MATERIALS  PY:2014
  TC:2  AU: Tejerina, M. R.;Jaque, D.;Torchia, G. A.;
7:16:16:5     Hydrostatic-pressure dependence of Raman-active optical phonons in Nd:Mg:LiNbO3
DOI:10.1016/j.optmat.2013.10.030  JN:OPTICAL MATERIALS  PY:2013
  TC:1  AU: Tejerina, M. R.;Pereira da Silva, K.;Goni, A. R.;Torchia, G. A.;
7:16:17:1     Deformation and stress at pop-in of lithium niobate induced by nanoindentation
DOI:10.1016/j.scriptamat.2014.01.018  JN:SCRIPTA MATERIALIA  PY:2014
  TC:1  AU: Zhang, Zhenyu;Yang, Song;Xu, Chaoge;Wang, Bo;Duan, Nengdong;
7:16:17:2     Effect of additives for higher removal rate in lithium niobate chemical mechanical planarization
DOI:10.1016/j.apsusc.2009.09.094  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:3  AU: Jeong, Sukhoon;Lee, Hyunseop;Cho, Hanchul;Lee, Sangjik;Kim, Hyoungjae;Kim, Sungryul;Park, Jaehong;Jeong, Haedo;
7:16:17:3     Contribution of stacking fault in lowering the theoretical density of nickel
DOI:10.1016/j.commatsci.2013.08.020  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2014
  TC:1  AU: Mittra, Joy;Waghmare, Umesh V.;Arya, Ashok;Dey, Gautam K.;
7:16:18:1     Reliability enhancement in nickel-particle-dispersed alkaline niobate piezoelectric composites and actuators
DOI:10.1016/j.jeurceramsoc.2010.11.025  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:4  AU: Zhang, Hailong;Yang, Shu;Yang, Sui;Kong, Decai;Zhang, Bo-Ping;Zhang, Yongjun;
7:16:18:2     Electrical properties of Ni-particle-dispersed alkaline niobate composites sintered in a protective atmosphere
DOI:10.1016/j.matchemphys.2010.02.041  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2010
  TC:6  AU: Zhang, Hailong;Yang, Shu;Zhang, Bo-Ping;Li, Jing-Feng;
7:16:18:3     Electrical properties tailoring in Ni-particle-dispersed (Ba0.95Ca0.05)(Ti0.96Zr0.04)O-3 composites
DOI:10.1016/j.matchemphys.2010.12.052  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:2  AU: Yang, Sui;Zhang, Hailong;Zhang, Su-Wei;Zhang, Bo-Ping;
7:16:18:4     Sintering and electrical properties of Cu-particle-dispersed (Na,K,Li)NbO3
DOI:10.1016/j.ceramint.2009.09.031  JN:CERAMICS INTERNATIONAL  PY:2010
  TC:1  AU: Zhao, Gao-Lei;Zhang, Hailong;Zhang, Bo-Ping;Li, Jing-Feng;
7:16:19:1     First principles calculations of hydrogen-induced decrease in the cohesive strength of alpha-Al2O3 single crystals
DOI:10.1016/j.commatsci.2011.10.038  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:0  AU: Huang, Hai-You;Wu, Ming;
7:16:19:2     Effect of humidity and hydrogen on the promotion of indentation crack growth in lead-free ferroelectric ceramics
DOI:10.1016/j.mseb.2010.01.048  JN:MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE  PY:2010
  TC:4  AU: Zhang, H. J.;Li, J. X.;Chu, W. Y.;Su, Y. J.;Qiao, L. J.;
7:16:19:3     Alignment of Ba-O divacancies as a mechanism for polarization imprint in BaTiO3 as revealed by first principles and classical molecular dynamics simulations
DOI:10.1063/1.3367751  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:4  AU: Ma, Ying;Liu, Bainian;Zhou, Yichun;Ding, Jianwen;
7:16:19:4     Single Vacancies and Vacancy Pairs in Tetragonal BaTiO3: A First Principles Study
DOI:10.1080/00150191003670374  JN:FERROELECTRICS  PY:2010
  TC:1  AU: Liu, Bainian;Ma, Ying;Zhou, Yichun;Ding, Jianwen;
7:17:1:1     BaMgF 4: An Ultra- Transparent Two- Dimensional Nonlinear Photonic Crystal with Strong. (3) Response in the UV Spectral Region
DOI:10.1002/adfm.201302588  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2014
  TC:4  AU: Mateos, Luis;Ramirez, Mariola O.;Carrasco, Irene;Molina, Pablo;Galisteo-Lopez, Juan F.;Villora, Encarnacion G.;de las Heras, Carmen;Shimamura, Kiyoshi;Lopez, Cefe;Bausa, Luisa E.;
7:17:1:2     Micro-spectroscopic characterization of ferroelectric domain structures in Yb3+: LiNbO3 prepared by electron beam writing
DOI:10.1364/OME.4.001077  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:4  AU: Mateos, Luis;Bausa, Luisa E.;Ramirez, Mariola O.;
7:17:1:3     Multifunctional solid state lasers based on ferroelectric crystals
DOI:10.1016/j.optmat.2011.03.016  JN:OPTICAL MATERIALS  PY:2012
  TC:13  AU: Ramirez, M. O.;Molina, P.;Bausa, L. E.;
7:17:1:4     Spontaneous Emission and Nonlinear Response Enhancement by Silver Nanoparticles in a Nd3+-Doped Periodically Poled LiNbO3 Laser Crystal
DOI:10.1002/adma.201203176  JN:ADVANCED MATERIALS  PY:2013
  TC:11  AU: Yraola, Eduardo;Molina, Pablo;Plaza, Jose L.;Ramirez, Mariola O.;Bausa, Luisa E.;
7:17:1:5     Two dimensional ferroelectric domain patterns in Yb3+ optically active LiNbO3 fabricated by direct electron beam writing
DOI:10.1063/1.4790149  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Mateos, L.;Bausa, L. E.;Ramirez, M. O.;
7:17:1:6     Directional dependence of the second harmonic response in two-dimensional nonlinear photonic crystals
DOI:10.1063/1.3459975  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:16  AU: Molina, P.;Ramirez, M. O.;Garcia, B. J.;Bausa, L. E.;
7:17:1:7     Blue SHG Enhancement by Silver Nanocubes Photochemically Prepared on a RbTiOPO4 Ferroelectric Crystal
DOI:10.1002/adma.201401603  JN:ADVANCED MATERIALS  PY:2014
  TC:0  AU: Sanchez-Garcia, Laura;Ramirez, Mariola O.;Molina, Pablo;Gallego-Gomez, Francisco;Mateos, Luis;Yraola, Eduardo;Carvajal, Joan J.;Aguilo, Magdalena;Diaz, Francesc;de las Heras, Carmen;Bausa, Luisa E.;
7:17:1:8     Neodymium doping in UV-IR transparent ferroelectric BaMgF4
DOI:10.1063/1.3294652  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Villora, E. G.;Molina, P.;Alvarez, S.;Garcia-Santizo, J. V.;Ramirez, M. O.;Shimamura, K.;Bausa, L. E.;
7:17:1:9     Homogeneous linewidth measurements of Yb3+ ions in congruent and stoichiometric lithium niobate crystals
DOI:10.1016/j.optmat.2014.09.022  JN:OPTICAL MATERIALS  PY:2014
  TC:0  AU: Kis, Zsolt;Mandula, Gabor;Lengyel, Krisztian;Hajdara, Ivett;Kovacs, Laszlo;Imlau, Mirco;
7:17:1:10     Local environment of optically active Nd3+ ions in the ultratransparent BaMgF4 ferroelectric crystal
DOI:10.1103/PhysRevB.85.184110  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Munoz-Santiuste, J. E.;Loro, H.;Marino, R.;Goldner, Ph.;Vasyliev, V.;Villora, E. G.;Shimamura, K.;Molina, P.;Ramirez, M. O.;Bausa, L. E.;
7:17:1:11     Optical spectroscopy of Yb3+ centers in BaMgF4 ferroelectric crystal
DOI:10.1063/1.3638040  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Garcia-Santizo, J. V.;del Rosal, B.;Ramirez, M. O.;Bausa, L. E.;Villora, E. G.;Molina, P.;Vasyliev, V.;Shimamura, K.;
7:17:1:12     Quasi-periodic self-assembled sub-micrometer ferroelectric bulk domain gratings in Rb-doped KTiOPO4
DOI:10.1063/1.4853315  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Zukauskas, Andrius;Pasiskevicius, Valdas;Canalias, Carlota;
7:17:1:13     Infrared to visible up conversion energy transfer confined at ordered micro-ring structures
DOI:10.1016/j.optmat.2012.03.013  JN:OPTICAL MATERIALS  PY:2012
  TC:0  AU: Mateos, L.;Garcia-Santizo, J. V.;Molina, P.;Deren, P. J.;Ramirez, M. O.;Bausa, L. E.;
7:17:1:14     Characterization of electron-beam recorded microdomain patterns on the nonpolar surface of LiNbO3 crystal by nondestructive methods
DOI:10.1063/1.4897279  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Kokhanchik, L. S.;Gainutdinov, R. V.;Mishina, E. D.;Lavrov, S. D.;Volk, T. R.;
7:17:2:1     Photoreduction of SERS-Active Metallic Nanostructures on Chemically Patterned Ferroelectric Crystals
DOI:10.1021/nn3025145  JN:ACS NANO  PY:2012
  TC:21  AU: Carville, N. Craig;Manzo, Michele;Damm, Signe;Castiella, Marion;Collins, Liam;Denning, Denise;Weber, Stefan A. L.;Gallo, Katia;Rice, James H.;Rodriguez, Brian J.;
7:17:2:2     Photoinduced Ag deposition on periodically poled lithium niobate: Wavelength and polarization screening dependence
DOI:10.1063/1.3580509  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:20  AU: Sun, Yang;Nemanich, Robert J.;
7:17:2:3     Direct shape control of photoreduced nanostructures on proton exchanged ferroelectric templates
DOI:10.1063/1.4789412  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Balobaid, Laila;Carville, N. Craig;Manzo, Michele;Gallo, Katia;Rodriguez, Brian J.;
7:17:2:4     Selective Plasmon Enhancement of the 1.08 mu m Nd3+ Laser Stark Transition by Tailoring Ag Nanoparticles Chains on a PPLN Y-cut
DOI:10.1021/nl4028999  JN:NANO LETTERS  PY:2013
  TC:4  AU: Molina, Pablo;Yraola, Eduardo;Ramirez, Mariola O.;Plaza, Jose L.;de las Heras, Carmen;Bausa, Luisa E.;
7:17:2:5     Electrostatic control of the domain switching dynamics in congruent LiNbO3 via periodic proton-exchange
DOI:10.1063/1.3571559  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:10  AU: Manzo, Michele;Laurell, Fredrik;Pasiskevicius, Valdas;Gallo, Katia;
7:17:2:6     Photoreduction of metal nanostructures on periodically proton exchanged MgO-doped lithium niobate crystals
DOI:10.1063/1.4827541  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:2  AU: Balobaid, Laila;Carville, N. Craig;Manzo, Michele;Collins, Liam;Gallo, Katia;Rodriguez, Brian J.;
7:17:2:7     Photo-induced Ag deposition on periodically poled lithium niobate: Concentration and intensity dependence
DOI:10.1063/1.3647752  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Sun, Yang;Eller, Brianna S.;Nemanich, Robert J.;
7:17:2:8     Growth mechanism of photoreduced silver nanostructures on periodically proton exchanged lithium niobate: Time and concentration dependence
DOI:10.1063/1.4801963  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:4  AU: Carville, N. Craig;Manzo, Michele;Denning, Denise;Gallo, Katia;Rodriguez, Brian J.;
7:17:2:9     Nanoscale characterization of beta-phase HxLi1-xNbO3 layers by piezoresponse force microscopy
DOI:10.1063/1.4891352  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Manzo, Michele;Denning, Denise;Rodriguez, Brian J.;Gallo, Katia;
7:17:2:10     Photoinduced Ag-nanoparticle deposition on Fe-doped lithium niobate crystals
DOI:10.1364/OME.4.000359  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:0  AU: Jia, Fangfang;Yan, Wenbo;Wang, Donghui;Zhang, Lixia;Shi, Lihong;Lin, Aidiao;Liang, Guohong;Li, Min;Zhang, Yuwei;Zhang, Jiushuang;Dong, Haiyun;Chen, Guifeng;Chen, Hongjian;
7:17:2:11     Patterning of silver nanoparticles on visible light-sensitive Mn-doped lithium niobate photogalvanic crystals
DOI:10.1063/1.3622654  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:5  AU: Liu, Xiaoyan;Hatano, Hideki;Takekawa, Shunji;Ohuchi, Fumio;Kitamura, Kenji;
7:17:2:12     Study of Domain Kinetics in SBN Single Crystals in Electric Field Applied by Suspension of Silver Nanoparticles
DOI:10.1080/00150193.2013.778610  JN:FERROELECTRICS  PY:2013
  TC:1  AU: Tyurnina, A. E.;Shur, V. Ya;Kozin, R. V.;Shikhova, V. A.;Kuznetsov, D. K.;Mingaliev, E. A.;Pelegov, D. V.;Pinegina, O. A.;Ivleva, L. I.;
7:17:3:1     Lithium niobate X-cut, Y-cut, and Z-cut surfaces from ab initio theory
DOI:10.1103/PhysRevB.81.214116  JN:PHYSICAL REVIEW B  PY:2010
  TC:27  AU: Sanna, Simone;Schmidt, Wolf Gero;
7:17:3:2     Polarization-dependent water adsorption on the LiNbO3(0001) surface
DOI:10.1103/PhysRevB.86.205407  JN:PHYSICAL REVIEW B  PY:2012
  TC:5  AU: Sanna, S.;Hoelscher, R.;Schmidt, W. G.;
7:17:3:3     Atomic-resolution imaging of the polar (000(1)over-bar) surface of LiNbO3 in aqueous solution by frequency modulation atomic force microscopy
DOI:10.1103/PhysRevB.86.075468  JN:PHYSICAL REVIEW B  PY:2012
  TC:9  AU: Rode, S.;Hoelscher, R.;Sanna, S.;Klassen, S.;Kobayashi, K.;Yamada, H.;Schmidt, W. G.;Kuehnle, A.;
7:17:3:4     Temperature dependent LiNbO3(0001): Surface reconstruction and surface charge
DOI:10.1016/j.apsusc.2014.01.104  JN:APPLIED SURFACE SCIENCE  PY:2014
  TC:5  AU: Sanna, S.;Hoelscher, R.;Schmidt, W. G.;
7:17:3:5     Charge compensation by long-period reconstruction in strongly polar lithium niobate surfaces
DOI:10.1103/PhysRevB.88.115422  JN:PHYSICAL REVIEW B  PY:2013
  TC:3  AU: Sanna, S.;Rode, S.;Hoelscher, R.;Klassen, S.;Marutschke, C.;Kobayashi, K.;Yamada, H.;Schmidt, W. G.;Kuehnle, A.;
7:17:3:6     Unraveling the LiNbO3 X-cut surface by atomic force microscopy and density functional theory
DOI:10.1103/PhysRevB.89.075403  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Sanna, S.;Schmidt, W. G.;Rode, S.;Klassen, S.;Kuehnle, A.;
7:17:3:7     Polarization-dependent methanol adsorption on lithium niobate Z-cut surfaces
DOI:10.1103/PhysRevB.86.125410  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Riefer, A.;Sanna, S.;Schmidt, W. G.;
7:17:3:8     Unraveling the LiNbO3 X-cut surface by atomic force microscopy and density functional theory (vol 89, 075403, 2014)
DOI:10.1103/PhysRevB.89.119901  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Sanna, S.;Schmidt, W. G.;Rode, S.;Klassen, S.;Kuehnle, A.;
7:17:3:9     GaN/LiNbO3 (0001) interface formation calculated from first-principles
DOI:10.1016/j.apsusc.2010.03.098  JN:APPLIED SURFACE SCIENCE  PY:2010
  TC:4  AU: Sanna, Simone;Schmidt, Wolf Gero;
7:17:3:10     Localised Phonon Modes at LiNbO3 (0001) Surfaces
DOI:10.1080/00150193.2011.594396  JN:FERROELECTRICS  PY:2011
  TC:1  AU: Sanna, S.;Berth, G.;Hahn, W.;Widhalm, A.;Zrenner, A.;Schmidt, W. G.;
7:17:4:1     Local probing of the interaction between intrinsic defects and ferroelectric domain walls in lithium niobate
DOI:10.1063/1.4789779  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Stone, Greg;Lee, Donghwa;Xu, Haixuan;Phillpot, Simon R.;Dierolf, Volkmar;
7:17:4:2     Multiphoton-induced luminescence contrast between antiparallel ferroelectric domains in Mg-doped LiNbO3
DOI:10.1063/1.4881496  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Reichenbach, P.;Kaempfe, T.;Thiessen, A.;Schroeder, M.;Haussmann, A.;Woike, T.;Eng, L. M.;
7:17:4:3     Frequency shift of Raman modes due to an applied electric field and domain inversion in LiNbO3
DOI:10.1103/PhysRevB.84.134303  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Stone, Greg;Knorr, Brian;Gopalan, Venkatraman;Dierolf, Volkmar;
7:17:4:4     Multiphoton photoluminescence contrast in switched Mg:LiNbO3 and Mg:LiTaO3 single crystals
DOI:10.1063/1.4896579  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Reichenbach, P.;Kaempfe, T.;Thiessen, A.;Haussmann, A.;Woike, T.;Eng, L. M.;
7:17:4:5     Field induced modification of defect complexes in magnesium-doped lithium niobate
DOI:10.1063/1.4905021  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Meyer, Nadege;Nataf, Guillaume F.;Granzow, Torsten;
7:17:4:6     Threshold behavior of the Einstein oscillator, electron-phonon interaction, band-edge absorption, and small hole polarons in LiNbO3:Mg crystals
DOI:10.1103/PhysRevB.86.165132  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Xin, Feifei;Zhai, Zhaohui;Wang, Xiaojie;Kong, Yongfa;Xu, Jingjun;Zhang, Guoquan;
7:17:5:1     Reversible Fragmentation and Self-Assembling of Nematic Liquid Crystal Droplets on Functionalized Pyroelectric Substrates
DOI:10.1002/adfm.201200323  JN:ADVANCED FUNCTIONAL MATERIALS  PY:2012
  TC:15  AU: Merola, Francesco;Grilli, Simonetta;Coppola, Sara;Vespini, Veronica;De Nicola, Sergio;Maddalena, Pasquale;Carfagna, Cosimo;Ferraro, Pietro;
7:17:5:2     Polarization-specific adsorption of organic molecules on ferroelectric LiNbO3 surfaces
DOI:10.1063/1.3525373  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:13  AU: Zhang, Zhengzheng;Sharma, P.;Borca, C. N.;Dowben, P. A.;Gruverman, A.;
7:17:5:3     Manipulation of Nematic Liquid Crystal Microdroplets by Pyroelectric Effect
DOI:10.1080/15421406.2012.763212  JN:MOLECULAR CRYSTALS AND LIQUID CRYSTALS  PY:2013
  TC:2  AU: Merola, Francesco;Grilli, Simonetta;Coppola, Sara;Vespini, Veronica;De Nicola, Sergio;Maddalena, Pasquale;Carfagna, Cosimo;Ferraro, Pietro;
7:17:5:4     Patterning of dielectric nanoparticles using dielectrophoretic forces generated by ferroelectric polydomain films
DOI:10.1063/1.3380829  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Mokry, P.;Marvan, M.;Fousek, J.;
7:17:6:1     Self-compensation of optical damage in reduced nominally pure LiNbO3 crystals
DOI:10.1063/1.3452377  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:8  AU: Kostritskii, S. M.;Aillerie, M.;Sevostyanov, O. G.;
7:17:6:2     Optical damage in reduced Z-cut LiNbO3 crystals caused by longitudinal photovoltaic and pyroelectric effects
DOI:10.1063/1.3675515  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Kostritskii, S. M.;Aillerie, M.;
7:17:6:3     Raman frequency shift induced by photorefractive effect on Fe-doped lithium niobate
DOI:10.1063/1.4826628  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Bazzan, M.;Kokanyan, N.;Zaltron, A.;Argiolas, N.;Chapron, D.;Fontana, M. D.;
7:17:6:4     All-optical technique to measure the pyroelectric coefficient in electro-optic crystals
DOI:10.1063/1.3544069  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Parravicini, Jacopo;Safioui, Jassem;Degiorgio, Vittorio;Minzioni, Paolo;Chauvet, Mathieu;
7:17:6:5     Interferometric measurement of the pyroelectric coefficient in lithium niobate
DOI:10.1063/1.4788696  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Popescu, S. T.;Petris, A.;Vlad, V. I.;
7:17:6:6     Recording of self-induced waveguides in lithium niobate at 405 nm wavelength by photorefractive-pyroelectric effect
DOI:10.1063/1.4808321  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:3  AU: Popescu, S. T.;Petris, A.;Vlad, V. I.;
7:17:6:7     Third column electro-optical coefficients of zirconium-doped congruent lithium niobate crystals
DOI:10.1016/j.optmat.2014.03.006  JN:OPTICAL MATERIALS  PY:2014
  TC:0  AU: Aillerie, Michel;Abarkan, Mustapha;Kostritskii, Sergey;Kokanyan, Edvard;
7:17:7:1     Bandstructure measurement in nonlinear optical waveguide arrays
DOI:10.1063/1.4793565  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Setzpfandt, F.;Falkner, M.;Pertsch, T.;Sohler, W.;Schiek, R.;
7:17:7:2     Controllable nonlinear refraction characteristics in hydrogenated nanocrystalline silicon
DOI:10.1063/1.4864132  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Zheng, D. Q.;Su, W. A.;Ye, Q. H.;Shen, W. Z.;
7:17:7:3     Femtosecond Z-scan measurement of third-order nonlinear refractive indices of BaMgF4
DOI:10.1063/1.3587642  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:9  AU: Chen, Junjie;Chen, Xianfeng;Wu, Anhua;Li, Hongjun;Zheng, Yuanlin;Ma, Yanzhi;Jiang, Linwen;Xu, Jun;
7:17:7:4     Crystal growth and frequency conversion of BaMgF4 single crystal by temperature gradient technique
DOI:10.1016/j.optmat.2014.10.038  JN:OPTICAL MATERIALS  PY:2014
  TC:0  AU: Wu, Anhua;Wang, Zhuo;Su, Liangbi;Jiang, Dapeng;Zou, Yuqi;Xu, Jun;Chen, Junjie;Ma, Yanzhi;Chen, Xianfeng;Hu, Zhanggui;
7:17:7:5     Temporal dynamics of all-optical switching in quadratic nonlinear directional couplers
DOI:10.1063/1.3696030  JN:APPLIED PHYSICS LETTERS  PY:2012
  TC:6  AU: Schiek, R.;Solntsev, A. S.;Neshev, D. N.;
7:17:7:6     Phase Transitions of Nonlinear Waves in Quadratic Waveguide Arrays
DOI:10.1103/PhysRevLett.105.233905  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:9  AU: Setzpfandt, Frank;Sukhorukov, Andrey A.;Neshev, Dragomir N.;Schiek, Roland;Kivshar, Yuri S.;Pertsch, Thomas;
7:17:8:1     Coexisting Surface Phases and Coherent One-Dimensional Interfaces on BaTiO3(001)
DOI:10.1021/nn501759g  JN:ACS NANO  PY:2014
  TC:4  AU: Morales, Erie H.;Martirez, John Mark P.;Saidi, Wissam A.;Rappe, Andrew M.;Bonnell, Dawn A.;
7:17:8:2     Atomic and Electronic Structure of the BaTiO3(001) (root 5 x root 5)R26.6 degrees Surface Reconstruction
DOI:10.1103/PhysRevLett.109.256802  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:7  AU: Martirez, John Mark P.;Morales, Erie H.;Saidi, Wissam A.;Bonnell, Dawn A.;Rappe, Andrew M.;
7:17:8:3     Strong Reciprocal Interaction between Polarization and Surface Stoichiometry in Oxide Ferroelectrics
DOI:10.1021/nl5035013  JN:NANO LETTERS  PY:2014
  TC:3  AU: Saidi, Wissam A.;Martirez, John Mark P.;Rappe, Andrew M.;
7:17:9:1     Growth, optical characterization and evaluation of laser properties of Yb3+, Mg2+:LiTaO3 crystal
DOI:10.1016/j.jcrysgro.2012.11.058  JN:JOURNAL OF CRYSTAL GROWTH  PY:2013
  TC:4  AU: Zhang, Peixiong;Hang, Yin;Gong, Juan;Zhao, Chengchun;Yin, Jigang;Zhang, Lianhan;
7:17:9:2     Optical properties of MgO doped near-stoichiometric LiTaO3 single crystals
DOI:10.1016/j.optmat.2011.05.007  JN:OPTICAL MATERIALS  PY:2011
  TC:7  AU: Hu, Pengchao;Zhang, Lianhan;Xiong, Jing;Yin, Jigang;Zhao, Chengchun;He, Xiaoming;Hang, Yin;
7:17:9:3     Formation mechanism of scattering centers in BaMgF4 single crystals
DOI:10.1016/j.jcrysgro.2010.12.053  JN:JOURNAL OF CRYSTAL GROWTH  PY:2011
  TC:2  AU: Zhao, Chengchun;Zhang, Lianhan;Hang, Yin;He, Xiaoming;Yin, Jigang;Hu, Pengchao;Chen, Guangzhu;He, Mingzhu;Huang, Huang;Zhu, Yongyuan;
7:17:9:4     Crystal growth, spectroscopic characterization, and laser operation of Tm/Mg: LiTaO3 crystal
DOI:10.1364/OME.4.000255  JN:OPTICAL MATERIALS EXPRESS  PY:2014
  TC:4  AU: Zhang, Peixiong;Yin, Jigang;Zhang, Shuaiyi;Zhang, Rui;Zhang, Lianhan;Liu, Youchen;Xu, Jianqiu;Hang, Yin;
7:17:9:5     Efficient enhanced 1.54 mu m emission in Er/Yb: LiNbO3 crystal codoped with Mg2+ ions
DOI:10.1016/j.optmat.2014.01.033  JN:OPTICAL MATERIALS  PY:2014
  TC:0  AU: Zhang, Peixiong;Yin, Jigang;Zhang, LianHan;Liu, Youchen;Hong, Jiaqi;Ning, Kaijie;Chen, Zhi;Wang, Xiangyong;Shi, Chunjun;Hang, Yin;
7:17:10:1     Surface enhanced luminescence and Raman scattering from ferroelectrically defined Ag nanopatterned arrays
DOI:10.1063/1.4818910  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:6  AU: Damm, Signe;Carville, N. Craig;Manzo, Michele;Gallo, Katia;Lopez, Sergio G.;Keyes, Tia E.;Forster, Robert J.;Rodriguez, Brian J.;Rice, James H.;
7:17:10:2     Surface enhanced luminescence and Raman scattering from ferroelectrically defined Ag nanopatterned arrays (vol 103, 083105, 2013)
DOI:10.1063/1.4820766  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Damm, Signe;Carville, N. Craig;Manzo, Michele;Gallo, Katia;Lopez, Sergio G.;Keyes, Tia E.;Forster, Robert J.;Rodriguez, Brian J.;Rice, James H.;
7:17:10:3     Structure and fluorescent properties of TiO2:Sm3+-Ag composite
DOI:10.1016/j.optmat.2010.06.017  JN:OPTICAL MATERIALS  PY:2010
  TC:5  AU: Dolgov, L.;Reedo, V.;Kiisk, V.;Pikker, S.;Sildos, I.;Kikas, J.;
7:18:1:1     Properties of discrete breathers in graphane from ab initio simulations
DOI:10.1103/PhysRevB.90.045432  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Chechin, G. M.;Dmitriev, S. V.;Lobzenko, I. P.;Ryabov, D. S.;
7:18:1:2     Discrete breathers in crystals with NaCl structure
DOI:10.1103/PhysRevB.81.214306  JN:PHYSICAL REVIEW B  PY:2010
  TC:21  AU: Khadeeva, Liya Z.;Dmitriev, Sergey V.;
7:18:1:3     Impact of intrinsic localized modes of atomic motion on materials properties
DOI:10.1016/j.actamat.2010.01.021  JN:ACTA MATERIALIA  PY:2010
  TC:26  AU: Manley, M. E.;
7:18:1:4     Multiple high-temperature transitions driven by dynamical structures in NaI
DOI:10.1103/PhysRevB.89.224106  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Manley, M. E.;Jeffries, J. R.;Lee, H.;Butch, N. P.;Zabalegui, A.;Abernathy, D. L.;
7:18:1:5     Lifetime of gap discrete breathers in diatomic crystals at thermal equilibrium
DOI:10.1103/PhysRevB.84.144304  JN:PHYSICAL REVIEW B  PY:2011
  TC:13  AU: Khadeeva, Liya Z.;Dmitriev, Sergey V.;
7:18:1:6     Lattice dynamics of NaI studied by inelastic neutron scattering: Absence of thermally induced discrete breathers
DOI:10.1103/PhysRevB.89.054308  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Kempa, M.;Ondrejkovic, P.;Bourges, P.;Marton, P.;Hlinka, J.;
7:18:1:7     Thermally populated intrinsic localized modes in pure alkali halide crystals
DOI:10.1103/PhysRevB.88.104305  JN:PHYSICAL REVIEW B  PY:2013
  TC:7  AU: Sievers, A. J.;Sato, M.;Page, J. B.;Roessler, T.;
7:18:1:8     Stone-Wales transformations triggered by intrinsic localized modes in carbon nanotubes
DOI:10.1103/PhysRevB.81.035401  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Shimada, Takahiro;Shirasaki, Daisuke;Kitamura, Takayuki;
7:18:1:9     Textures of quantum intrinsically localized modes
DOI:10.1103/PhysRevB.90.134301  JN:PHYSICAL REVIEW B  PY:2014
  TC:0  AU: Kanbur, Derya;Riseborough, Peter S.;
7:18:1:10     Prediction of high-frequency intrinsic localized modes in Ni and Nb
DOI:10.1103/PhysRevB.84.144303  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Haas, M.;Hizhnyakov, V.;Shelkan, A.;Klopov, M.;Sievers, A. J.;
7:18:1:11     Quantized intrinsically localized modes of the Fermi-Pasta-Ulam lattice
DOI:10.1080/14786435.2011.607141  JN:PHILOSOPHICAL MAGAZINE  PY:2012
  TC:5  AU: Basu, Sukalpa;Riseborough, Peter S.;
7:18:1:12     Energy localization on the Al sublattice of Pt3Al with L1(2) order
DOI:10.1063/1.4837598  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Medvedev, N. N.;Starostenkov, M. D.;Manley, M. E.;
7:18:1:13     The Korteweg-de Vries equation: its place in the development of nonlinear physics
DOI:10.1080/14786435.2010.530758  JN:PHILOSOPHICAL MAGAZINE  PY:2011
  TC:4  AU: Riseborough, Peter S.;
7:18:1:14     Generation of Localized Modes in an Electrical Lattice Using Subharmonic Driving
DOI:10.1103/PhysRevLett.108.084101  JN:PHYSICAL REVIEW LETTERS  PY:2012
  TC:6  AU: English, L. Q.;Palmero, F.;Candiani, P.;Cuevas, J.;Carretero-Gonzalez, R.;Kevrekidis, P. G.;Sievers, A. J.;
7:18:1:15     Dislocation vs. production bias revisited with account of radiation-induced emission bias. I. Void swelling under electron and light ion irradiation
DOI:10.1080/14786435.2012.704425  JN:PHILOSOPHICAL MAGAZINE  PY:2012
  TC:3  AU: Dubinko, V. I.;Hu, S.;Li, Yu;Henager, C. H., Jr.;Kurtz, R. J.;
7:18:2:1     On the special points on the (P,T,x)-phase diagram for Sn2P2(Se x S1- x )6 crystals: acoustic studies of Sn2P2(Se0.28S0.72)(6)
DOI:10.1080/14786435.2012.728010  JN:PHILOSOPHICAL MAGAZINE  PY:2013
  TC:1  AU: Mys, O.;Martynyuk-Lototska, I.;Zapeka, B.;Vlokh, R.;
7:18:2:2     About the existence of a Lifshitz point on the phase diagram of Sn2P2(SexS1-x)(6) solid solutions: acoustic and optical studies
DOI:10.1080/14786435.2011.581705  JN:PHILOSOPHICAL MAGAZINE  PY:2011
  TC:10  AU: Martynyuk-Lototska, I.;Mys, O.;Zapeka, B.;Vlokh, R.;
7:18:2:3     Sound behavior near the Lifshitz point in proper ferroelectrics
DOI:10.1103/PhysRevB.82.054101  JN:PHYSICAL REVIEW B  PY:2010
  TC:10  AU: Kohutych, A.;Yevych, R.;Perechinskii, S.;Samulionis, V.;Banys, J.;Vysochanskii, Yu.;
7:18:2:4     Thermal expansion of the Sn2P2(Se0.28S0.72)6 solid solutions
DOI:10.1080/14786435.2010.485937  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:9  AU: Say, A.;Mys, O.;Vlokh, R.;
7:18:2:5     On the Order of Phase Transition in Sn2P2(Se0.28S0.72)(6) Solid Solutions: Optical Birefringence Studies
DOI:10.1080/00150193.2011.578985  JN:FERROELECTRICS  PY:2011
  TC:7  AU: Zapeka, B.;Mys, O.;Vlokh, R.;
7:18:2:6     Acoustic wave velocities and elastic properties of Sn2P2(Se0.28S0.72)6 solid solutions
DOI:10.1080/14786435.2010.505181  JN:PHILOSOPHICAL MAGAZINE  PY:2010
  TC:6  AU: Martynyuk-Lototska, I.;Mys, O.;Zapeka, B.;Grabar, A.;Vlokh, R.;
7:18:2:7     On the tricritical point on the (p, T)-phase diagram of Sn2P2S6 crystals
DOI:10.1080/14786435.2011.613413  JN:PHILOSOPHICAL MAGAZINE  PY:2011
  TC:7  AU: Martynyuk-Lototska, I.;Say, A.;Mys, O.;Vlokh, R.;
7:18:2:8     Tricritical Behavior of Sn2P2S6 Ferroelectrics at Hydrostatic Pressure
DOI:10.1080/00150193.2010.489866  JN:FERROELECTRICS  PY:2010
  TC:4  AU: Vysochanskii, Yu. M.;Kohutych, A. A.;Kityk, A. V.;Zadorozhna, A. V.;Khoma, M. M.;Grabar, A. A.;
7:18:2:9     Elastic and acoustooptic properties of Sn2P2S6 crystals: Effect of ferroelectric phase transition
DOI:10.1016/j.optmat.2012.07.025  JN:OPTICAL MATERIALS  PY:2012
  TC:2  AU: Mys, O.;Zapeka, B.;Martynyuk-Lototska, I.;Vlokh, R.;
7:18:2:10     Ultrasonic Behavior Near Phase Transitions in (PbySn1-y)(2)P2S6 Ferroelectric Materials
DOI:10.1080/00150193.2014.890882  JN:FERROELECTRICS  PY:2014
  TC:0  AU: Samulionis, V.;Banys, J.;Macutkevic, J.;Vysochanskii, Yu.;
7:18:3:1     Multiple-time-scale analysis of nonlinear modes in ferroelectric LiNbO3
DOI:10.1103/PhysRevB.81.064104  JN:PHYSICAL REVIEW B  PY:2010
  TC:18  AU: Bandyopadhyay, A. K.;Ray, P. C.;Vu-Quoc, Loc;McGurn, Arthur R.;
7:18:3:2     Dark soliton based frequency dependent dielectric constant of ferroelectric materials
DOI:10.1063/1.4900606  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Giri, Pradipta;Mandal, M. K.;
7:18:3:3     Klein-Gordon equation approach to nonlinear split-ring resonator based metamaterials: One-dimensional systems
DOI:10.1103/PhysRevB.84.155429  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Giri, Pradipta;Choudhary, Kamal;Sen Gupta, Arnab;Bandyopadhyay, A. K.;McGurn, Arthur R.;
7:18:3:4     Quantum pinning-transition due to charge defects in ferroelectrics
DOI:10.1063/1.3607298  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:6  AU: Biswas, Arindam;Choudhary, Kamal;Bandyopadhyay, A. K.;Bhattacharjee, A. K.;Mandal, D.;
7:18:3:5     Discrete breathers in nonlinear LiNbO3-type ferroelectrics
DOI:10.1063/1.3552909  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:8  AU: Giri, Pradipta;Choudhary, Kamal;Sengupta, Arnab;Bandyopadhyay, A. K.;Ray, P. C.;
7:18:3:6     Discrete energy levels of bright solitons in lithium niobate ferroelectrics
DOI:10.1103/PhysRevB.86.184101  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Giri, Pradipta;Choudhary, Kamal;Dey, Arghya;Biswas, Arindam;Ghosal, Aniruddha;Bandyopadhyay, A. K.;
7:18:3:7     Search for Light-Induced Intrinsic Localized Modes: Negative Result
DOI:10.1080/00150193.2012.746882  JN:FERROELECTRICS  PY:2012
  TC:1  AU: Kempa, M.;Ondrejkovic, P.;Ollivier, J.;Rols, S.;Kulda, J.;Margueron, S.;Fernandez, M.;Hlinka, J.;
7:18:3:8     Quantum breathers in Klein-Gordon lattice: Non-periodic boundary condition approach
DOI:10.1063/1.3666013  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:3  AU: Mandal, Subhra Jyoti;Choudhary, Kamal;Biswas, Arindam;Bandyopadhyay, A. K.;Bhattacharjee, A. K.;Mandal, D.;
7:18:3:9     Bound to unbound state route and propagation of dark solitons showing acoustical memory
DOI:10.1063/1.4891466  JN:AIP ADVANCES  PY:2014
  TC:1  AU: Roy, Rakesh;Giri, Pradipta;Das, Bappa;Choudhary, Kamal;Ghosal, Aniruddha;Bandyopadhyay, A. K.;
7:18:3:10     Multiple-time-scale analysis of nonlinear modes in ferroelectric LiNbO3 (vol 81, pg 064104, 2010)
DOI:10.1103/PhysRevB.81.069901  JN:PHYSICAL REVIEW B  PY:2010
  TC:0  AU: Bandyopadhyay, A. K.;Ray, P. C.;Vu-Quoc, Loc;McGurn, Arthur R.;
7:18:3:11     Charge sensor and particle trap based on z-cut lithium niobate
DOI:10.1063/1.4818143  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:4  AU: Esseling, Michael;Zaltron, Annamaria;Sada, Cinzia;Denz, Cornelia;
7:18:3:12     Electro-optic effect of lithium niobate in piezoelectric resonance
DOI:10.1063/1.4769306  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Takeda, Kotaro;Hoshina, Takuya;Takeda, Hiroaki;Tsurumi, Takaaki;
7:18:4:1     Common characteristics of displacive and relaxor ferroelectrics
DOI:10.1103/PhysRevB.81.064106  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Bishop, A. R.;Bussmann-Holder, A.;Kamba, S.;Maglione, M.;
7:18:4:2     Origin of polar nanoregions in relaxor ferroelectrics: Nonlinearity, discrete breather formation, ge transfer
DOI:10.1103/PhysRevB.83.184301  JN:PHYSICAL REVIEW B  PY:2011
  TC:7  AU: Macutkevic, J.;Banys, J.;Bussmann-Holder, A.;Bishop, A. R.;
7:18:4:3     Origin of polar nanoregions in relaxor ferroelectrics: Nonlinearity, discrete breather formation, and charge transfer (vol 83, 184301, 2011)
DOI:10.1103/PhysRevB.83.229901  JN:PHYSICAL REVIEW B  PY:2011
  TC:0  AU: Macutkevic, J.;Banys, J.;Bussmann-Holder, A.;Bishop, A. R.;
7:18:5:1     Dynamics of Localized Modes in a Composite Multiferroic Chain
DOI:10.1103/PhysRevLett.111.117202  JN:PHYSICAL REVIEW LETTERS  PY:2013
  TC:2  AU: Chotorlishvili, L.;Khomeriki, R.;Sukhov, A.;Ruffo, S.;Berakdar, J.;
7:18:5:2     Steering Magnetization with Electric Fields in a Composite Multi-Ferroic Chain
DOI:10.1080/00150193.2012.675829  JN:FERROELECTRICS  PY:2012
  TC:5  AU: Sukhov, Alexander;Horley, Paul P.;Jia, Chenglong;Berakdar, Jamal;
7:18:6:1     Symmetry-adapted non-equilibrium molecular dynamics of chiral carbon nanotubes under tensile loading
DOI:10.1063/1.3596827  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:4  AU: Aghaei, Amin;Dayal, Kaushik;
7:18:6:2     Anomalous phonon behavior of carbon nanotubes: First-order influence of external load
DOI:10.1063/1.4774077  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:0  AU: Aghaei, Amin;Dayal, Kaushik;Elliott, Ryan S.;
7:19:1     Micrometer and nanometer-scale parallel patterning of ceramic and organic-inorganic hybrid materials
DOI:10.1016/j.jeurceramsoc.2010.01.016  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:31  AU: ten Elshof, Johan E.;Khan, Sajid U.;Gobel, Ole F.;
7:19:2     Patterning Functional Materials Using Channel Diffused Plasma-Etched Self-Assembled Mono layer Templates
DOI:10.1021/la2013667  JN:LANGMUIR  PY:2011
  TC:10  AU: George, Antony;Maijenburg, A. Wouter;Maas, Michiel G.;Blank, Dave H. A.;ten Elshof, Johan E.;
7:19:3     Nanoscale Patterning of Organosilane Molecular Thin Films from the Gas Phase and Its Applications: Fabrication of Multifunctional Surfaces and Large Area Molecular Templates for Site-Selective Material Deposition
DOI:10.1021/la204437r  JN:LANGMUIR  PY:2012
  TC:11  AU: George, Antony;Knez, Mato;Hlawacek, Gregor;Hagedoorn, Daniel;Verputten, Hein H. J.;van Gastel, Raoul;ten Elshof, Johan E.;
7:19:4     Micro and nanopatterning of functional materials on flexible plastic substrates via site-selective surface modification using oxygen plasma
DOI:10.1039/c1jm14931h  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:2  AU: George, Antony;Stawski, Tomasz M.;Unnikrishnan, Sandeep;Veldhuis, Sjoerd A.;ten Elshof, Johan E.;
7:19:5     Initial Attatchment of rMSC and MG-63 Cells on Patterned Bioglass (R) Substrates
DOI:10.1002/adem.201180068  JN:ADVANCED ENGINEERING MATERIALS  PY:2012
  TC:10  AU: Detsch, Rainer;Guillon, Olivier;Wondraczek, Lothar;Boccaccini, Aldo R.;
7:19:6     Ceramic Mask-Assisted Flame Spray Pyrolysis for Direct and Accurate Patterning of Metal Oxide Nanoparticles
DOI:10.1002/adem.201300032  JN:ADVANCED ENGINEERING MATERIALS  PY:2013
  TC:0  AU: Halfer, Torben;Zhang, Huanjun;Maedler, Lutz;Rezwan, Kurosch;
7:19:7     Thin Films of Conductive ZnO Patterned by Micromolding Resulting in Nearly Isolated Features
DOI:10.1021/am9007374  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2010
  TC:11  AU: Gobel, Ole F.;Blank, Dave H. A.;ten Elshof, Johan E.;
7:19:8     Versatile Crack-Free Ceramic Micropatterns Made by a Modified Molding Technique
DOI:10.1111/j.1551-2916.2010.03902.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Holthaus, Marzellus Grosse;Kropp, Miron;Treccani, Laura;Lang, Walter;Rezwan, Kurosch;
7:19:9     Microstructure development in zinc oxide nanowires and iron oxohydroxide nanotubes by cathodic electrodeposition in nanopores
DOI:10.1557/jmr.2011.93  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:9  AU: Maas, Michiel G.;Rodijk, Eddy J. B.;Maijenburg, A. Wouter;Blank, Dave H. A.;ten Elshof, Johan E.;
7:19:10     Orientation of human osteoblasts on hydroxyapatite-based microchannels
DOI:10.1016/j.actbio.2011.07.031  JN:ACTA BIOMATERIALIA  PY:2012
  TC:17  AU: Holthaus, M. G.;Stolle, J.;Treccani, L.;Rezwan, K.;
7:19:11     Electrodeposition in Capillaries: Bottom-up Micro- and Nanopatterning of Functional Materials on Conductive Substrates
DOI:10.1021/am200852w  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2011
  TC:5  AU: George, Antony;Maijenburg, A. Wouter;Maas, Michiel G.;Blank, Dave H. A.;ten Elshof, Johan E.;
7:19:12     Ultraviolet laser interference patterning of hydroxyapatite surfaces
DOI:10.1016/j.apsusc.2010.10.120  JN:APPLIED SURFACE SCIENCE  PY:2011
  TC:10  AU: Berger, Jana;Holthaus, Marzellus Grosse;Pistillo, Nicola;Roch, Teja;Rezwan, Kurosch;Lasagni, Andres Fabian;
7:19:13     Comparison of micropatterning methods for ceramic surfaces
DOI:10.1016/j.jeurceramsoc.2011.07.020  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Holthaus, Marzellus Grosse;Treccani, Laura;Rezwan, Kurosch;
7:19:14     Free-Standing Patterned Ceramic Structures Obtained by Soft Micromolding
DOI:10.1002/adem.201100013  JN:ADVANCED ENGINEERING MATERIALS  PY:2011
  TC:4  AU: Seils, Sascha;Baraki, Raschid;Jamin, Christine;Guillon, Olivier;
7:19:15     Stacks of Functional Oxide Thin Films Patterned by Micromolding
DOI:10.1021/am100795j  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2010
  TC:3  AU: Gobel, Ole F.;Branfield, Thomas E.;Stawski, Tomasz M.;Veldhuis, Sjoerd A.;Blank, Dave H. A.;ten Elshof, Johan E.;
7:19:16     ZnO Submicrometer Rod Array by Soft Lithographic Micromolding with High Solid Loading Nanoparticle Suspension
DOI:10.1111/jace.12069  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2013
  TC:3  AU: Chen, Bo;Lu, Kathy;Ramsburg, Kelly;
7:19:17     Sub-50 nm patterning of functional oxides by soft lithographic edge printing
DOI:10.1039/c2jm31121f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:2  AU: George, Antony;Ten Elshof, Johan E.;
7:19:18     Nanopatterning of Functional Materials by Gas Phase Pattern Deposition of Self-Assembled Molecular Thin Films in Combination with Electrodeposition
DOI:10.1021/la202210s  JN:LANGMUIR  PY:2011
  TC:6  AU: George, Antony;Maijenburg, A. Wouter;Nguyen, Minh Duc;Maas, Michiel G.;Blank, Dave H. A.;ten Elshof, Johan E.;
7:19:19     Thin Films of Two Functional Oxides Patterned Laterally by Soft Lithography
DOI:10.1021/am201474t  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:0  AU: Goebel, Ole F.;Stawski, Tomasz M.;ten Elshof, Johan E.;
7:19:20     Concentration Dependence on the Shape and Size of Sol-Gel-Derived Yttria-Stabilized Zirconia Ceramic Features by Soft Lithographic Patterning
DOI:10.1021/la302893s  JN:LANGMUIR  PY:2012
  TC:2  AU: Veldhuis, Sjoerd A.;George, Antony;Nijland, Maarten;ten Elshof, Johan E.;
7:19:21     Free-Standing Ultrathin Ceramic Foils
DOI:10.1111/j.1551-2916.2010.03927.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:6  AU: Bonderer, Lorenz J.;Chen, Philipp W.;Kocher, Peter;Gauckler, Ludwig J.;
7:19:22     Solution Deposition of Micropatterned Nanocrystalline Metal Oxide Films Through Hydrogels
DOI:10.1111/j.1551-2916.2011.04738.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:3  AU: Tredici, Ilenia G.;Yaghmaie, Frank;Irving, Michael;Wijesundara, Muthu B. J.;Maglia, Filippo;Quartarone, Eliana;Anselmi-Tamburini, Umberto;
7:19:23     Fabrication of Micropatterns on Silica Glass by a Room-Temperature Imprinting Method
DOI:10.1111/j.1551-2916.2010.04368.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:1  AU: Ikeda, Hiroshi;Fujino, Shigeru;Kajiwara, Toshihisa;
7:19:24     Preparation and photoluminescence of monolithic silica glass doped with Tb3+ ions using SiO2-PVA nanocomposite
DOI:10.1016/j.optmat.2014.02.011  JN:OPTICAL MATERIALS  PY:2014
  TC:3  AU: Ikeda, Hiroshi;Murata, Takahiro;Fujino, Shigeru;
7:19:25     Micropatterned nanocrystalline zinc oxide thin films obtained through metal-loaded hydrogels
DOI:10.1016/j.tsf.2011.02.076  JN:THIN SOLID FILMS  PY:2011
  TC:4  AU: Tredici, I. G.;Yaghmaie, F.;Irving, M.;Wijesundara, M. B. J.;Maglia, F.;Quartarone, E.;Galinetto, P.;Anselmi-Tamburini, U.;
7:19:26     A simple two-step solution chemistry method for synthesis of micropatterned ZnO nanorods based on metal-loaded hydrogels
DOI:10.1016/j.tsf.2012.10.052  JN:THIN SOLID FILMS  PY:2012
  TC:3  AU: Tredici, Ilenia G.;Resmini, Alessandro;Yaghmaie, Frank;Irving, Michael;Maglia, Filippo;Anselmi-Tamburini, Umberto;
7:19:27     Solution deposition of micropatterned TiO2, ZrO2, SnO2, and In2O3 thin films through metal-loaded hydrogels
DOI:10.1016/j.tsf.2013.06.044  JN:THIN SOLID FILMS  PY:2013
  TC:1  AU: Tredici, Ilenia G.;Maglia, Filippo;Resmini, Alessandro;Anselmi-Tamburini, Umberto;
7:19:28     Cell-Assisted Deposition of Inorganic Coatings
DOI:10.1111/j.1551-2916.2011.04622.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:1  AU: Sommi, Patrizia;Oldani, Amanda;Maglia, Filippo;Chiozzi, Valentina;Tredici, Ilenia G.;Ricci, Vittorio;Anselmi-Tamburini, Umberto;
7:19:29     Templated electrodeposition of Ag7NO11 nanowires with very high oxidation states of silver
DOI:10.1016/j.matlet.2011.07.108  JN:MATERIALS LETTERS  PY:2011
  TC:4  AU: Rodijk, E. J. B.;Maijenburg, A. W.;Maas, M. G.;Blank, D. H. A.;ten Elshof, J. E.;
7:20:1:1     Multiferroic properties of NiS nanoplates grown within Na-4 mica
DOI:10.1016/j.jmmm.2012.04.030  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:5  AU: Mandal, Amrita;Bose, Anindita;Mitra, Sreemanta;Datta, Anindya;Banerjee, Sourish;Chakravorty, Dipankar;
7:20:1:2     Multiferroic GaN nanofilms grown within Na-4 mica channels
DOI:10.1063/1.3340897  JN:APPLIED PHYSICS LETTERS  PY:2010
  TC:12  AU: Bhattacharya, Santanu;Datta, A.;Chakravorty, D.;
7:20:1:3     Magnetodielectric effect in Co3O4 nanoparticles grown within a silica glass
DOI:10.1016/j.jmmm.2010.11.068  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:10  AU: Hajra, Partha;Dutta, Saurav;Brahma, Pradip;Chakravorty, Dipankar;
7:20:1:4     Ferroeletric like characteristics in redox active polymer of 5,10,15,20 tetra(4-hydroxyphenyl)-porphyrin at room temperature
DOI:10.1063/1.4813736  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:0  AU: Koiry, S. P.;Celestin, M. E.;Ratnadurai, R.;Veerender, P.;Majumder, C.;Krishnan, S.;Stefanakos, E.;Goswami, Y.;Aswal, D. K.;Bhansali, Shekhar;
7:20:1:5     Magnetodielectric properties of nanodisc bismuth ferrite grown within Na-4 mica nanochannels
DOI:10.1063/1.3512910  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:4  AU: Hajra, Partha;Pal, Mrinal;Datta, Anindya;Chakravorty, Dipankar;Meriakri, Vyacheslav;Parkhomenko, Michael;
7:20:1:6     Room temperature magnetoelectric coupling in single crystal Bi2Fe4O9 nanotubes grown within an anodic aluminum oxide template
DOI:10.1016/j.matlet.2012.04.123  JN:MATERIALS LETTERS  PY:2012
  TC:1  AU: Hajra, P.;Maiti, R. P.;Chakravorty, D.;
7:20:1:7     Multiferroic Behavior in Composites of Nickel-Exchanged Glass Containing Nanoparticles of Barium Titanate
DOI:10.1111/j.1551-2916.2011.04490.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2011
  TC:0  AU: Naidu, R. Venkata Ram;Hajra, Partha;Datta, Anindya;Bhattacharya, Santanu;Chakravorty, Dipankar;
7:20:1:8     Magnetic properties of chalcogenide spinel CuCr2Se4 nanocrystals
DOI:10.1016/j.jmmm.2009.08.042  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:2  AU: Tsoi, G. M.;Wenger, L. E.;Wang, Y. -H. A.;Gupta, A.;
7:20:1:9     Enhanced magnetic anisotropy of nickel nanosheet prepared in Na-4 mica
DOI:10.1016/j.jmmm.2012.03.004  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:1  AU: Mitra, Sreemanta;Mandal, Amrita;Datta, Anindya;Banerjee, Sourish;Chakrayorty, Dipankar;
7:20:2:1:1     Iron-Age bronze statuettes in Southern Portugal: combining archaeological data with EDXRF and BSEM plus EDS to assess provenance and production technology
DOI:10.1007/s00339-013-7747-7  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:5  AU: Schiavon, Nick;Celauro, Angela;Manso, Marta;Brunetti, Antonio;Susanna, Fiammetta;
7:20:2:1:2     Combining chemical data with GIS and PCA to investigate Phoenician-Punic Cu-metallurgy
DOI:10.1007/s00339-013-8179-0  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Celauro, Angela;Schiavon, Nick;Brunetti, Antonio;Manfredi, Lorenza-Ilia;Susanna, Fiammetta;Dekayir, Abdelilah;Graziani, Valerio;Pargny, Dominique;Ferro, Daniela;
7:20:2:1:3     A multianalytical approach to study the Phoenician bronze technology in the Iberian Peninsula-A view from Quinta do Almaraz
DOI:10.1016/j.matchar.2012.02.020  JN:MATERIALS CHARACTERIZATION  PY:2012
  TC:16  AU: Valerio, P.;Silva, R. J. C.;Araujo, M. F.;Soares, A. M. M.;Barros, L.;
7:20:2:1:4     A Roman bronze statuette with gilded silver mask from Sardinia: an EDXRF study
DOI:10.1007/s00339-013-7721-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:6  AU: Cesareo, Roberto;Brunetti, Antonio;D'Oriano, Rubens;Canu, Alba;Demontis, Gonaria Mattia;Celauro, Angela;
7:20:2:1:5     XRF investigation on skeletal remains from King Peter III of Aragon (1239-1285 AD) and Queen Blanche of Anjou (1280-1310 AD)
DOI:10.1007/s00339-014-8272-z  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2014
  TC:1  AU: Piga, Giampaolo;Brunetti, Antonio;Lasio, Barbara;Enzo, Stefano;Malgosa, Assumpcio;
7:20:2:1:6     A multianalytical approach to investigate stone biodeterioration at a UNESCO world heritage site: the volcanic rock-hewn churches of Lalibela, Northern Ethiopia
DOI:10.1007/s00339-013-7757-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:4  AU: Schiavon, Nick;De Caro, Tilde;Kiros, Alemayehu;Caldeira, Ana Teresa;Parisi, Isabella Erica;Riccucci, Cristina;Gigante, Giovanni Ettore;
7:20:2:1:7     Metallography and microstructure interpretation of some archaeological tin bronze vessels from Iran
DOI:10.1016/j.matchar.2014.09.007  JN:MATERIALS CHARACTERIZATION  PY:2014
  TC:2  AU: Oudbashi, Omid;Davami, Parviz;
7:20:2:2:1     Characterization of a Messer - The late-Medieval single-edged sword of Central Europe
DOI:10.1016/j.matchar.2013.10.005  JN:MATERIALS CHARACTERIZATION  PY:2013
  TC:0  AU: Fajfar, Peter;Medved, Jozef;Klancnik, Grega;Lazar, Tomaz;Necemer, Marijan;Mrvar, Primoz;
7:20:2:2:2     Characterization of a 12-pdr wrought-iron cannonball from the Akko 1 shipwreck
DOI:10.1016/j.matchar.2013.06.012  JN:MATERIALS CHARACTERIZATION  PY:2013
  TC:3  AU: Cvikel, D.;Ashkenazi, D.;Stern, A.;Kahanov, Y.;
7:20:2:2:3     Archaeometallurgical investigation of the iron anchor from the Tantura F shipwreck
DOI:10.1016/j.matchar.2013.01.004  JN:MATERIALS CHARACTERIZATION  PY:2013
  TC:2  AU: Aronson, A.;Ashkenazi, D.;Barkai, O.;Kahanov, Y.;
7:20:3:1     Cultural heritage and archaeology materials studied by synchrotron spectroscopy and imaging
DOI:10.1007/s00339-011-6686-4  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2012
  TC:28  AU: Bertrand, Loic;Robinet, Laurianne;Thoury, Mathieu;Janssens, Koen;Cohen, Serge X.;Schoeder, Sebastian;
7:20:3:2     X-rays absorption study on medieval corrosion layers for the understanding of very long-term indoor atmospheric iron corrosion
DOI:10.1007/s00339-010-5638-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:11  AU: Monnier, J.;Reguer, S.;Vantelon, D.;Dillmann, P.;Neff, D.;Guillot, I.;
7:20:3:3     FTIR techniques applied to the detection of gelatine in paper artifacts: from macroscopic to microscopic approach
DOI:10.1007/s00339-010-5649-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:6  AU: Rouchon, Veronique;Pellizzi, Eleonora;Janssens, Koen;
7:20:3:4     Medieval glass from the Cathedral in Paderborn: a comparative study using X-ray absorption spectroscopy, X-ray fluorescence, and inductively coupled laser ablation mass spectrometry
DOI:10.1007/s00339-012-7505-2  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:4  AU: Hormes, J.;Roy, A.;Bovenkamp, G. -L.;Simon, K.;Kim, C. -Y.;Boerste, N.;Gai, S.;
7:20:3:5     Degradation of azurite in mural paintings: distribution of copper carbonate, chlorides and oxalates by SRFTIR
DOI:10.1007/s00339-010-5673-5  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:10  AU: Lluveras, A.;Boularand, S.;Andreotti, A.;Vendrell-Saz, M.;
7:20:3:6     A multi-analytical study of the fifteenth century mural paintings of the Batalha Monastery (Portugal) in view of their conservation
DOI:10.1007/s00339-013-7727-y  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:1  AU: Valadas, S.;Candeias, A.;Dias, C.;Schiavon, N.;Cotovio, M.;Pestana, J.;Gil, M.;Mirao, J.;
7:20:3:7     Synchrotron-based multiple-beam FTIR chemical imaging of a multi-layered polymer in transmission and reflection: towards cultural heritage applications
DOI:10.1007/s00339-012-7481-6  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2013
  TC:5  AU: Unger, Miriam;Mattson, Eric;Patterson, Catherine Schmidt;Alavi, Zahrasadet;Carson, David;Hirschmugl, Carol J.;
7:20:3:8     Non-invasive characterization of manufacturing techniques and corrosion of ancient Chinese bronzes and a later replica using synchrotron X-ray diffraction
DOI:10.1007/s00339-010-5646-8  JN:APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING  PY:2010
  TC:5  AU: Young, M. L.;Casadio, F.;Schnepp, S.;Pearlstein, E.;Almer, J. D.;Haeffner, D. R.;
7:20:3:9     The long-term corrosion of mild steel in depassivated concrete: Localizing the oxygen reduction sites in corrosion products by isotopic tracer method
DOI:10.1557/jmr.2011.391  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:3  AU: Burger, Emilien;Monnier, Judith;Berger, Pascal;Neff, Delphine;L'Hostis, Valerie;Perrin, Stephanie;Dillmann, Philippe;
7:20:4:1     How does iron interact with sporopollenin exine capsules? An X-ray absorption study including microfocus XANES and XRF imaging
DOI:10.1039/c3tb21523g  JN:JOURNAL OF MATERIALS CHEMISTRY B  PY:2014
  TC:1  AU: Archibald, Stephen J.;Atkin, Stephen L.;Bras, Wim;Diego-Taboada, Alberto;Mackenzie, Grahame;Mosselmans, J. Frederick W.;Nikitenko, Sergey;Quinn, Paul D.;Thomas, Michael F.;Young, Nigel A.;
7:20:4:2     Phase transformation and exchange bias effects in mechanically alloyed Fe/magnetite powders
DOI:10.1016/j.jallcom.2011.03.147  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:7  AU: Crisan, O.;Crisan, A. D.;
7:20:4:3     Viability of plant spore exine capsules for microencapsulation
DOI:10.1039/c0jm02246b  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:9  AU: Barrier, Sylvain;Diego-Taboada, Alberto;Thomasson, Matthew J.;Madden, Leigh;Pointon, Joanna C.;Wadhawan, Jay D.;Beckett, Stephen T.;Atkin, Stephen L.;Mackenzie, Grahame;
7:20:4:4     Protein free microcapsules obtained from plant spores as a model for drug delivery: ibuprofen encapsulation, release and taste masking
DOI:10.1039/c2tb00228k  JN:JOURNAL OF MATERIALS CHEMISTRY B  PY:2013
  TC:5  AU: Diego-Taboada, Alberto;Maillet, Laurent;Banoub, Joseph H.;Lorch, Mark;Rigby, Alan S.;Boa, Andrew N.;Atkin, Stephen L.;Mackenzie, Grahame;
7:20:4:5     Magnetic model for a horse-spleen ferritin with a three-phase core structure
DOI:10.1016/j.jmmm.2011.06.060  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:5  AU: Jung, J. H.;Eom, T. W.;Lee, Y. P.;Rhee, J. Y.;Choi, E. H.;
7:20:5:1     Magnetodielectric effect in CdS nanosheets grown within Na-4 mica
DOI:10.1063/1.3698501  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Mandal, Amrita;Mitra, Sreemanta;Datta, Anindya;Banerjee, Sourish;Chakravorty, Dipankar;
7:20:5:2     Magnetodielectric effect of CuO grown within highly ordered two dimensional mesoporous silica template SBA 15
DOI:10.1063/1.4757421  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:1  AU: Mandal, Amrita;Banerjee, Shilpi;Banerjee, Sourish;Chakravorty, Dipankar;
7:20:6:1     Magnetodielectric effect in composites of nanodimensional glass and CuO nanoparticles
DOI:10.1016/j.jmmm.2012.07.021  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2012
  TC:2  AU: Saha, Dhriti Ranjan;Mukherjee, Manabendra;Chakravorty, Dipankar;
7:20:6:2     Exchange bias effect in composites of cuo nanoparticles and nanosilica glass
DOI:10.1016/j.jmmm.2013.12.013  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2014
  TC:0  AU: Saha, Dhriti Ranjan;Nandi, Arun Kumar;Chakravorty, Dipankar;
7:20:6:3     Nanoglass in lithia-silica system grown within pores of pellets comprising CuO nanoparticles
DOI:10.1016/j.ssi.2011.01.017  JN:SOLID STATE IONICS  PY:2011
  TC:9  AU: Saha, Dhriti Ranjan;Datta, Anindya;Mandal, Sankar;Mukherjee, Manabendra;Nandi, Arun Kumar;Chakravorty, Dipankar;
7:20:6:4     Enhancement of ionic conductivity in Li2O-SiO2 glass in nanodimensions grown within pellets of ZnO nanorods and magnetodielectric properties of these nanocomposites
DOI:10.1016/j.jnoncrysol.2013.04.054  JN:JOURNAL OF NON-CRYSTALLINE SOLIDS  PY:2013
  TC:3  AU: Saha, Dhriti Ranjan;Nandi, Arun Kumar;Chakravorty, Dipankar;
7:20:6:5     Structural and room-temperature ferromagnetic properties of Fe-doped CuO nanocrystals
DOI:10.1063/1.3436573  JN:JOURNAL OF APPLIED PHYSICS  PY:2010
  TC:11  AU: Li, Youxia;Xu, Mei;Pan, Liqing;Zhang, Yaping;Guo, Zhengang;Bi, Chong;
7:20:7:1     Sequestration of edible oil from emulsions using new single and double layered microcapsules from plant spores
DOI:10.1039/c2jm00103a  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:5  AU: Diego-Taboada, Alberto;Cousson, Priscille;Raynaud, Elodie;Huang, Youkui;Lorch, Mark;Binks, Bernard P.;Queneau, Yves;Boa, Andrew N.;Atkin, Stephen L.;Beckett, Stephen T.;Mackenzie, Grahame;
7:20:7:2     Encapsulation of living cells into sporopollenin microcapsules
DOI:10.1039/c1jm13719k  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2011
  TC:6  AU: Hamad, Shwan A.;Dyab, Amro F. K.;Stoyanov, Simeon D.;Paunov, Vesselin N.;
7:20:7:3     Hollow microspheres with binary colloidal and polymeric membrane: Effect of polymer and particle concentrations
DOI:10.1016/j.apt.2009.08.005  JN:ADVANCED POWDER TECHNOLOGY  PY:2010
  TC:7  AU: Cayre, Olivier J.;Biggs, Simon;
7:21:1:1     Synthesis, characterization and ferroelectric properties of lead-free K0.5Na0.5NbO3 nanotube arrays
DOI:10.1063/1.3592636  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:9  AU: Zhou, Di;Gu, Haoshuang;Hu, Yongming;Tian, Huyong;Wang, Zhao;Qian, Zheli;Wang, Yu;
7:21:1:2     Perovskite phase transformation in 0.65Pb(Mg1/3Nb2/3)O-3-0.35PbTiO(3) nanoparticles derived by sol-gel
DOI:10.1063/1.3677974  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:3  AU: Singh, Satyendra;Krupanidhi, S. B.;
7:21:1:3     Evidence of spin phonon coupling in magnetoelectric NiFe2O4/PMN-PT composite
DOI:10.1063/1.4850555  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Ahlawat, Anju;Satapathy, S.;Sathe, V. G.;Choudhary, R. J.;Gupta, P. K.;
7:21:1:4     Phase transition in BaTiO3 nanotube arrays
DOI:10.1063/1.3530614  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Yang, Yang;Wang, Xiaohui;Sun, Changku;Li, Longtu;
7:21:1:5     Synthesis, structural characterization and ferroelectric properties of Pb0.76Ca0.24TiO3 nanotubes
DOI:10.1016/j.matchemphys.2011.10.002  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:3  AU: Singh, Satyendra;Krupanidhi, S. B.;
7:21:1:6     Synthesis and characterization of single-crystalline (K,Na)NbO3 nanorods
DOI:10.1016/j.ceramint.2012.11.065  JN:CERAMICS INTERNATIONAL  PY:2013
  TC:6  AU: Zhang, De-Qing;Wang, Da-Wei;Zhu, Hou-Bin;Yang, Xiu-Ying;Lu, Ran;Wen, Bo;Cao, Wen-Qiang;Yuan, Jie;Cao, Mao-Sheng;
7:21:1:7     Single-handed helical carbonaceous bundles prepared using a chiral polybissilsesquioxane
DOI:10.1016/j.matlet.2014.04.182  JN:MATERIALS LETTERS  PY:2014
  TC:2  AU: Wang, Qingfeng;Chen, Hao;Li, Baozong;Li, Yi;Yang, Yonggang;
7:21:1:8     Synthesis, characterization and ferroelectric properties of lead-free K(0.5)Na(0.5)NbO(3) nanotube arrays (vol 109, 114104, 2011)
DOI:10.1063/1.3633225  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:0  AU: Zhou, Di;Gu, Haoshuang;Hu, Yongming;Tian, Huyong;ZhaoWang;Qian, Zheli;Wang, Yu;
7:21:2:1     Characterization of Composites Based on Recycled Expanded Polystyrene Reinforced with Curaua Fibers
DOI:10.1002/app.38236  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2013
  TC:4  AU: Borsoi, Cleide;Scienza, Lisete C.;Zattera, Ademir J.;
7:21:2:2     Biomicrofibrilar composites of high density polyethylene reinforced with curaua fibers: Mechanical, interfacial and morphological properties
DOI:10.1016/j.compscitech.2010.06.006  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2010
  TC:25  AU: Araujo, J. R.;Mano, B.;Teixeira, G. M.;Spinace, M. A. S.;De Paoli, Marco-A.;
7:21:2:3     Polyolefin composites with curaua fibres: Effect of the processing conditions on mechanical properties, morphology and fibres dimensions
DOI:10.1016/j.compscitech.2009.09.002  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2010
  TC:31  AU: Mano, B.;Araujo, J. R.;Spinace, M. A. S.;De Paoli, M. -A.;
7:21:2:4     Crystallinity, oxidation states and morphology of polyaniline coated curaua fibers in polyamide-6 composites
DOI:10.1016/j.compscitech.2013.08.039  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2013
  TC:3  AU: Araujo, J. R.;Adamo, C. B.;De Robertis, E.;Kuznetsov, A. Yu;Archanjo, B. S.;Fragneaud, B.;Achete, C. A.;De Paoli, M-A.;
7:21:2:5     Elastomer Composite Based on EPDM Reinforced with Polyaniline Coated Curaua Fibers Prepared by Mechanical Mixing
DOI:10.1002/app.40056  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2014
  TC:1  AU: Araujo, Joyce R.;Adamo, Cristina B.;Rocha, Werickson F. C.;Costa e Silva, Marcos V.;Carozo, Vitor;Calil, Vanessa L.;De Paoli, Marco-A;
7:21:2:6     Lignocellulosic Fiber Reinforced Composites: Influence of Compounding Conditions on Defibrization and Mechanical Properties
DOI:10.1002/app.38468  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2013
  TC:9  AU: Beaugrand, Johnny;Berzin, Francoise;
7:21:2:7     Effects of various polymerization techniques on PANI deposition at the surface of cellulose ester microporous membranes: XPS and electrical conductivity studies
DOI:10.1016/j.synthmet.2012.04.009  JN:SYNTHETIC METALS  PY:2012
  TC:6  AU: Qaiser, Asif A.;Hyland, Margaret M.;Patterson, Darrell A.;
7:21:3:1     A facile method to fabricate vertically aligned (K,Na)NbO3 lead-free piezoelectric nanorods
DOI:10.1039/c2jm35090d  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2012
  TC:9  AU: Xu, Ying;Yu, Qi;Li, Jing-Feng;
7:21:3:2     Orientation-Control Synthesis of KTa0.25Nb0.75O3 Nanorods
DOI:10.1111/j.1551-2916.2009.03461.x  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2010
  TC:9  AU: Hu, Yong-Ming;Gu, Hao-Shuang;Zhou, Di;Wang, Zhao;Chan, Helen Lai-Wa;Wang, Yu;
7:21:3:3     Hydrothermal synthesis of epitaxial NaxK(1-x)NbO3 solid solution films
DOI:10.1016/j.tsf.2011.01.078  JN:THIN SOLID FILMS  PY:2011
  TC:8  AU: Handoko, Albertus D.;Goh, Gregory K. L.;
7:21:4:1     Silica Nanoparticles Treated by Cold Atmospheric-Pressure Plasmas Improve the Dielectric Performance of Organic-Inorganic Nanocomposites
DOI:10.1021/am300300f  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2012
  TC:19  AU: Yan, Wei;Han, Zhao Jun;Phung, B. Toan;Ostrikov, Kostya (Ken);
7:21:4:2     Biodegradable Composites: Morphological, Chemical, Thermal, and Mechanical Properties of Composites of Poly(hydroxybutyrate-co-hydroxyvalerate) with Curaua Fibers After Exposure to Simulated Soil
DOI:10.1002/APP.40712  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2014
  TC:1  AU: Beltrami, Lilian V. R.;Bandeira, Joao A. V.;Scienza, Lisete C.;Zattera, Ademir J.;
7:21:4:3     Composites of Plasma Surface Functionalized Barium Titanate Nanoparticles Covalently Attached to Epoxide Matrices: Synthesis and Evaluation
DOI:10.1021/am900677s  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2010
  TC:10  AU: Mukherjee, Narayan;Wavhal, Dattatray;Timmons, Richard B.;
7:21:4:4     Mechanisms and impact of fiber-matrix compatibilization techniques on the material characterization of PHBV/oak wood flour engineered biobased composites
DOI:10.1016/j.compscitech.2012.01.021  JN:COMPOSITES SCIENCE AND TECHNOLOGY  PY:2012
  TC:19  AU: Srubar, Wil V., III;Pilla, Srikanth;Wright, Zachary C.;Ryan, Cecily A.;Greene, Joseph P.;Frank, Curtis W.;Billington, Sarah L.;
7:21:5:1     Microstructure, thermal and dielectric properties of homogeneous bismaleimide-triazine/barium titanate nanocomposite films
DOI:10.1016/j.matchemphys.2011.09.060  JN:MATERIALS CHEMISTRY AND PHYSICS  PY:2011
  TC:4  AU: Zeng, Xiaoliang;Yu, Shuhui;Sun, Rong;Du, Ruxu;
7:21:5:2     Synergistic Effects of Zirconia-Coated Carbon Nanotube on Crystalline Structure of Polyvinylidene Fluoride Nanocomposites: Electrical Properties and Flame-Retardant Behavior
DOI:10.1021/la903022j  JN:LANGMUIR  PY:2010
  TC:15  AU: Pal, Kaushik;Kang, Dong Jin;Zhang, Zhen Xiu;Kim, Jin Kuk;
7:21:5:3     Microstructural investigations of zirconium oxide-on core-shell structure of carbon nanotubes
DOI:10.1007/s11051-010-0152-7  JN:JOURNAL OF NANOPARTICLE RESEARCH  PY:2011
  TC:2  AU: Pal, Kaushik;Kang, Dong Jin;Kim, Jin Kuk;
7:21:6:1     Study of UV-aging of thermoplastic polyurethane material
DOI:10.1016/j.msea.2010.01.014  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2010
  TC:12  AU: Boubakri, A.;Guermazi, N.;Elleuch, K.;Ayedi, H. F.;
7:21:6:2     O-3/UV Synergistic Aging of Polyester Polyurethane Film Modified by Composite UV Absorber
DOI:10.1155/2013/169405  JN:JOURNAL OF NANOMATERIALS  PY:2013
  TC:1  AU: Wang, Yanzhi;Wang, Haiyan;Li, Xuesong;Liu, Dongxu;Jiang, Yifan;Sun, Zonghui;
7:21:6:3     Effects of Additives on Weather-Resistance Properties of Polyurethane Films Exposed to Ultraviolet Radiation and Ozone Atmosphere
DOI:10.1155/2014/487343  JN:JOURNAL OF NANOMATERIALS  PY:2014
  TC:0  AU: Wang, Haiying;Wang, Yanzhi;Liu, Dongxu;Sun, Zonghui;Wang, Huicong;
7:21:6:4     Thermal and tensile properties of HTPB-based PU with PVC blends
DOI:10.1016/j.msea.2011.03.056  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2011
  TC:10  AU: Chen, Chiou-Juy;Tseng, I-Hsiang;Lu, Hsu-Tung;Tseng, Wen-Yen;Tsai, Mei-Hui;Huang, Shih-Liang;
7:22:1:1     Mechanism of charge transfer/disproportionation in LnCu(3)Fe(4)O(12) (Ln = lanthanides)
DOI:10.1103/PhysRevB.89.125125  JN:PHYSICAL REVIEW B  PY:2014
  TC:2  AU: Rezaei, N.;Hansmann, P.;Bahramy, M. S.;Arita, R.;
7:22:1:2     Charge transfer and antiferromagnetic order in the A-site-ordered perovskite LaCu3Fe4O12
DOI:10.1039/c0jm00767f  JN:JOURNAL OF MATERIALS CHEMISTRY  PY:2010
  TC:14  AU: Chen, Wei-tin;Long, Youwen;Saito, Takashi;Attfield, J. Paul;Shimakawa, Yuichi;
7:22:1:3     Suppression of Intersite Charge Transfer in Charge-Disproportionated Perovskite YCu3Fe4O12
DOI:10.1021/ja312015j  JN:JOURNAL OF THE AMERICAN CHEMICAL SOCIETY  PY:2013
  TC:8  AU: Etani, Hidenobu;Yamada, Ikuya;Ohgushi, Kenya;Hayashi, Naoaki;Kusano, Yoshihiro;Mizumaki, Masaichiro;Kim, Jungeun;Tsuji, Naruki;Takahashi, Ryoji;Nishiyama, Norimasa;Inoue, Toru;Irifune, Tetsuo;Takano, Mikio;
7:22:1:4     Mechanism of A-B intersite charge transfer and negative thermal expansion in A-site-ordered perovskite LaCu3Fe4O12
DOI:10.1063/1.4721408  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:5  AU: Li, Hongping;Lv, Shuhui;Wang, Zhongchang;Xia, Yanjie;Bai, Yijia;Liu, Xiaojuan;Meng, Jian;
7:22:1:5     Pressure Effect on Intersite Charge Transfer in A-site-Ordered Double-Perovskite-Structure Oxide
DOI:10.1021/cm301267e  JN:CHEMISTRY OF MATERIALS  PY:2012
  TC:11  AU: Long, You-wen;Kawakami, Takateru;Chen, Wei-tin;Saito, Takashi;Watanuki, Tetsu;Nakakura, Yuta;Liu, Qing-qing;Jin, Chang-qing;Shimakawa, Yuichi;
7:22:2:1     Synthesis, crystal structure, and valence states of Mn-substituted La2RuO5
DOI:10.1103/PhysRevB.90.024406  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Riegg, S.;Garcia-Garcia, F. J.;Reller, A.;Loidl, A.;Ebbinghaus, S. G.;
7:22:2:2     Magnetic and thermodynamic properties of the spin-dimer system La2RuO5 induced by Mn substitution
DOI:10.1103/PhysRevB.90.024407  JN:PHYSICAL REVIEW B  PY:2014
  TC:1  AU: Riegg, S.;Wintermeier, A.;von Nidda, H. -A. Krug;Widmann, S.;Guenther, A.;Reller, A.;Ebbinghaus, S. G.;Loidl, A.;
7:22:2:3     Synthesis, structure, and magnetic characterization of La2-xRxRuO5 (R = Pr, Nd, Sm, Gd, Dy)
DOI:10.1103/PhysRevB.84.014403  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Riegg, S.;Sazama, U.;Froeba, M.;Reller, A.;Ebbinghaus, S. G.;
7:22:2:4     Spin-singlet dimerization in La2RuO5 investigated using magnetic susceptibility and specific heat measurements
DOI:10.1103/PhysRevB.86.115125  JN:PHYSICAL REVIEW B  PY:2012
  TC:7  AU: Riegg, S.;Guenther, A.;von Nidda, H. -A. Krug;Loidl, A.;Eremin, M. V.;Reller, A.;Ebbinghaus, S. G.;
7:22:2:5     Crystal structure and magnetic properties of Pr- and Ti-substituted La2RuO5
DOI:10.1016/j.materresbull.2013.07.054  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Riegg, S.;Loidl, A.;Reller, A.;Ebbinghaus, S. G.;
7:22:3:1     Structure-property coupling in Sr-3(Ru1-xMnx)(2)O-7
DOI:10.1103/PhysRevB.84.174411  JN:PHYSICAL REVIEW B  PY:2011
  TC:8  AU: Hu, Biao;McCandless, Gregory T.;Garlea, V. O.;Stadler, S.;Xiong, Yimin;Chan, Julia Y.;Plummer, E. W.;Jin, R.;
7:22:3:2     Mn induced ferromagnetism spin fluctuation enhancement in Sr2Ru1-xMnxO4
DOI:10.1016/j.jmmm.2013.04.028  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Zheng, Long;Cai, Jinzhu;Xie, Qiyun;Lv, Bin;Mao, Z. Q.;Wu, X. S.;
7:22:3:3     Mott versus Slater-type metal-insulator transition in Mn-substituted Sr3Ru2O7
DOI:10.1103/PhysRevB.86.041102  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Hossain, M. A.;Bohnenbuck, B.;Chuang, Y. D.;Haverkort, M. W.;Elfimov, I. S.;Tanaka, A.;Gonzalez, A. G. Cruz;Hu, Z.;Lin, H. -J.;Chen, C. T.;Mathieu, R.;Tokura, Y.;Yoshida, Y.;Tjeng, L. H.;Hussain, Z.;Keimer, B.;Sawatzky, G. A.;Damascelli, A.;
7:22:3:4     Single-bilayer E-type antiferromagnetism in Mn-substituted Sr3Ru2O7: Neutron scattering study
DOI:10.1103/PhysRevB.85.180410  JN:PHYSICAL REVIEW B  PY:2012
  TC:3  AU: Mesa, Dalgis;Ye, Feng;Chi, Songxue;Fernandez-Baca, J. A.;Tian, W.;Hu, Biao;Jin, R.;Plummer, E. W.;Zhang, Jiandi;
7:22:3:5     Doping and dimensionality effects on the core-level spectra of layered ruthenates
DOI:10.1103/PhysRevB.81.155121  JN:PHYSICAL REVIEW B  PY:2010
  TC:2  AU: Guo, Haizhong;Li, Yi;Urbina, Darwin;Hu, Biao;Jin, Rongying;Liu, Tijiang;Fobes, David;Mao, Zhiqiang;Plummer, E. W.;Zhang, Jiandi;
7:22:4:1     High-field magnetization and magnetoresistance of the A-site ordered perovskite oxide CaCu3Ti4-xRuxO12 (0 <= x <= 4)
DOI:10.1103/PhysRevB.85.195122  JN:PHYSICAL REVIEW B  PY:2012
  TC:1  AU: Kida, T.;Kammuri, R.;Hagiwara, M.;Yoshii, S.;Kobayashi, W.;Iwakawa, M.;Terasaki, I.;
7:22:4:2     Synthesis, Structure, and Physical Properties of A-site Ordered Perovskites ACu(3)Co(4)O(12) (A = Ca and Y)
DOI:10.1021/cm101671j  JN:CHEMISTRY OF MATERIALS  PY:2010
  TC:7  AU: Yamada, Ikuya;Ishiwata, Shintaro;Terasaki, Ichiro;Azuma, Masaki;Shimakawa, Yuichi;Takano, Mikio;
7:22:4:3     Valence fluctuations and correlated metallic states in A-site ordered perovskite oxides ACu(3)V(4)O(12) (A = Na, Ca, and Y)
DOI:10.1103/PhysRevB.81.165111  JN:PHYSICAL REVIEW B  PY:2010
  TC:7  AU: Morita, Yosuke;Sudayama, Takaaki;Takubo, Kou;Shiraki, Hiroshi;Saito, Takashi;Shimakawa, Yuichi;Mizokawa, Takashi;
7:22:4:4     Correlation effects in CaCu3Ru4O12
DOI:10.1103/PhysRevB.87.155122  JN:PHYSICAL REVIEW B  PY:2013
  TC:2  AU: Hollmann, N.;Hu, Z.;Maignan, A.;Guenther, A.;Jang, L. -Y.;Tanaka, A.;Lin, H. -J.;Chen, C. T.;Thalmeier, P.;Tjeng, L. H.;
7:22:4:5     Transition from Pauli-paramagnetism to ferromagnetism in CaCu3(Ru4-xMnx)O-12 (0 <= x <= 3) perovskites
DOI:10.1063/1.3597783  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:2  AU: de la Calle, C.;Sanchez-Benitez, J.;Barbanson, F.;Nemes, N.;Fernandez-Diaz, M. T.;Alonso, J. A.;
7:22:4:6     First-principles study of CaCu3B4O12 (B=Co, Rh, Ir)
DOI:10.1007/s10853-012-6530-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:4  AU: Mukherjee, Swarnakamal;Sarkar, Soumyajit;Saha-Dasgupta, T.;
7:23:1:1     Abnormal Poisson's ratio and Linear Compressibility in Perovskite Materials
DOI:10.1002/adma.201104676  JN:ADVANCED MATERIALS  PY:2012
  TC:8  AU: Huang, C. W.;Ren, Wei;Viet Cuong Nguyen;Chen, Zuhuang;Wang, Junling;Sritharan, T.;Chen, Lang;
7:23:1:2     Poisson's ratio and modern materials
DOI:10.1038/NMAT3134  JN:NATURE MATERIALS  PY:2011
  TC:233  AU: Greaves, G. N.;Greer, A. L.;Lakes, R. S.;Rouxel, T.;
7:23:1:3     Elastic anisotropy and extreme Poisson's ratios in single crystals
DOI:10.1016/j.actamat.2010.08.006  JN:ACTA MATERIALIA  PY:2010
  TC:17  AU: Lethbridge, Zoe A. D.;Walton, Richard I.;Marmier, Arnaud S. H.;Smith, Christopher W.;Evans, Kenneth E.;
7:23:1:4     Universal relation between viscous flow and fast dynamics in glass-forming materials
DOI:10.1103/PhysRevB.81.100202  JN:PHYSICAL REVIEW B  PY:2010
  TC:17  AU: Scopigno, T.;Cangialosi, D.;Ruocco, G.;
7:23:2:1     Extreme Poisson's ratios and their electronic origin in B2 CsCl-type AB intermetallic compounds
DOI:10.1103/PhysRevB.85.134108  JN:PHYSICAL REVIEW B  PY:2012
  TC:6  AU: Wang, X. F.;Jones, Travis E.;Li, W.;Zhou, Y. C.;
7:23:2:2     X-ray diffraction study of the phase purity, order and texture of ductile B2 intermetallics
DOI:10.1016/j.actamat.2010.01.026  JN:ACTA MATERIALIA  PY:2010
  TC:5  AU: Mulay, R. P.;Wollmershauser, J. A.;Heisel, M. A.;Bei, H.;Russell, A. M.;Agnew, S. R.;
7:23:2:3     The deformation behavior of DyCu ductile intermetallic compound under compression
DOI:10.1016/j.msea.2011.06.038  JN:MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES  PY:2011
  TC:4  AU: Cao, G. H.;Yu, Z.;Russell, A. M.;
7:23:2:4     Topological Catastrophe and Isostructural Phase Transition in Calcium
DOI:10.1103/PhysRevLett.105.265702  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:10  AU: Jones, Travis E.;Eberhart, Mark E.;Clougherty, Dennis P.;
7:23:3:1:1     Shock melting of cerium
DOI:10.1103/PhysRevB.81.214109  JN:PHYSICAL REVIEW B  PY:2010
  TC:8  AU: Jensen, B. J.;Cherne, F. J.;Cooley, J. C.;Zhernokletov, M. V.;Kovalev, A. E.;
7:23:3:1:2     Phase states of dynamically compressed cerium
DOI:10.1103/PhysRevB.84.094120  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Elkin, V. M.;Mikhaylov, V. N.;Petrovtsev, A. V.;Cherne, F. J.;
7:23:3:1:3     Dynamic compression of cerium in the low-pressure gamma-alpha region of the phase diagram
DOI:10.1063/1.4732126  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:2  AU: Jensen, B. J.;Cherne, F. J.;
7:23:3:2:1     Hugoniot and sound velocity measurements of bismuth in the range of 11-70 GPa
DOI:10.1063/1.4792755  JN:JOURNAL OF APPLIED PHYSICS  PY:2013
  TC:2  AU: Tan, Ye;Yu, Yuying;Dai, Chengda;Jin, Ke;Wang, Qingsong;Hu, Jianbo;Tan, Hua;
7:23:3:2:2     Shock-induced decomposition of a high density glass (ZF6)
DOI:10.1063/1.3601115  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:1  AU: Zhou, Xianming;Liu, Xun;Li, Jiabo;Li, Jun;Cao, Xiuxia;
7:23:3:2:3     On equation of state, elastic, and lattice dynamic stability of bcc bismuth under high pressure: Ab-initio calculations
DOI:10.1063/1.4863785  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:0  AU: Mukherjee, D.;Sahoo, B. D.;Joshi, K. D.;Gupta, Satish C.;
7:23:4:1     Anisotropic elasticity and abnormal Poisson's ratios in super-hard materials
DOI:10.1063/1.4904100  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Huang, Chuanwei;Li, Rongpeng;Chen, Lang;
7:23:4:2     Anisotropy of bond projections in simple crystal structures
DOI:10.1103/PhysRevB.84.132106  JN:PHYSICAL REVIEW B  PY:2011
  TC:1  AU: Simunek, Antonin;
7:23:4:3     Effect of Adhesive Interactions on Static Friction at the Atomic Scale
DOI:10.1103/PhysRevLett.105.056102  JN:PHYSICAL REVIEW LETTERS  PY:2010
  TC:6  AU: Carkner, Carolyn J.;Haw, Sarah M.;Mosey, Nicholas J.;
7:23:5:1     Mesoscale friction anisotropy revealed by slidingless tests
DOI:10.1557/jmr.2011.270  JN:JOURNAL OF MATERIALS RESEARCH  PY:2011
  TC:1  AU: Annett, James;Gao, Yanfei;Cross, Graham L. W.;Herbert, Erik G.;Lucas, Barry N.;
7:23:5:2     Effective Poisson's ratio from combined normal and lateral contacts of single crystals
DOI:10.1557/jmr.2011.330  JN:JOURNAL OF MATERIALS RESEARCH  PY:2012
  TC:1  AU: Lee, J. H.;Gao, Y. F.;Pharr, G. M.;
7:23:5:3     Determining the coefficient of friction between solids without sliding
DOI:10.1016/j.wear.2010.04.017  JN:WEAR  PY:2010
  TC:2  AU: Reina, S.;Paynter, R. J. H.;Hills, D. A.;Dini, D.;
7:24:1:1     Effects of molecular weight on poly(omega-pentadecalactone) mechanical and thermal properties
DOI:10.1016/j.polymer.2010.01.007  JN:POLYMER  PY:2010
  TC:32  AU: Cai, Jiali;Liu, Chen;Cai, Minmin;Zhu, Jie;Zuo, Feng;Hsiao, Benjamin S.;Gross, Richard A.;
7:24:1:2     Caseinate Based Biodegradable Films with Improved Water Resistance
DOI:10.1002/app.32146  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2010
  TC:8  AU: Audic, Jean-Luc;Chaufer, Bernard;
7:24:1:3     Aliphatic/aromatic copolyesters containing biobased omega-hydroxyfatty acids: Synthesis and structure-property relationships
DOI:10.1016/j.polymer.2013.05.007  JN:POLYMER  PY:2013
  TC:6  AU: Celli, Annamaria;Marchese, Paola;Sullalti, Simone;Cai, Jiali;Gross, Richard A.;
7:24:1:4     Characterization of biodegradable poly(butylene adipate--terephtalate)/sodium caseinate films loaded with an alkyl furanoside as antimicrobial agent
DOI:10.1007/s10853-012-6480-5  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:2  AU: Audic, Jean-Luc;Legentil, Laurent;Nugier-Chauvin, Caroline;Ferrieres, Vincent;Potel, Michel;Roisnel, Thierry;
7:24:1:5     The environmental influence in enzymatic polymerization of aliphatic polyesters in bulk and aqueous mini-emulsion
DOI:10.1016/j.polymer.2010.09.016  JN:POLYMER  PY:2010
  TC:10  AU: Malberg, Sofia;Finne-Wistrand, Anna;Albertsson, Ann-Christine;
7:24:2:1     Composition-dependent physical properties of poly[(vinylidene fluoride)-co-trifluoroethylene]-poly(ethylene oxide) blends
DOI:10.1007/s10853-013-7141-z  JN:JOURNAL OF MATERIALS SCIENCE  PY:2013
  TC:5  AU: Costa, C. M.;Tamano Machiavello, M. N.;Gomez Ribelles, J. L.;Lanceros-Mendez, S.;
7:24:2:2     Physicochemical properties of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium ion battery applications: Influence of poly(ethylene oxide) molecular weight
DOI:10.1016/j.ssi.2014.09.029  JN:SOLID STATE IONICS  PY:2014
  TC:5  AU: Correia, Daniela M.;Costa, Carlos M.;Nunes-Pereira, Joao;Silva, Maria M.;Botelho, Gabriela;Gomez Ribelles, Jose Luis;Lanceros-Mendez, Senenxtu;
7:24:2:3     Electroactive Poly(Vinylidene Fluoride-Trifluorethylene) (PVDF-TrFE) Microporous Membranes for Lithium-Ion Battery Applications
DOI:10.1080/00150193.2012.677729  JN:FERROELECTRICS  PY:2012
  TC:7  AU: Costa, C. M.;California, A.;Cardoso, V. F.;Sencadas, V.;Rodrigues, L. C.;Silva, M. M.;Lanceros-Mendez, S.;
7:24:3:1     Effects of Plasticization and Shear Stress on Phase Structure Development and Properties of Soy Protein Blends
DOI:10.1021/am100751c  JN:ACS APPLIED MATERIALS & INTERFACES  PY:2010
  TC:9  AU: Chen, Feng;Zhang, Jinwen;
7:24:3:2     Properties of biodegradable poly(butylene adipate-co-terephtalate) and sodium caseinate blends
DOI:10.1002/app.36765  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2012
  TC:1  AU: Audic, Jean-Luc;Chaufer, Bernard;
7:24:3:3     In-situ poly(butylene adipate-co-terephthalate)/soy protein concentrate composites: Effects of compatibilization and composition on properties
DOI:10.1016/j.polymer.2010.02.035  JN:POLYMER  PY:2010
  TC:18  AU: Chen, Feng;Zhang, Jinwen;
7:24:3:4     Optimization of tensile properties thermoplastic blends from soy and biodegradable polyesters: Taguchi design of experiments approach
DOI:10.1007/s10853-011-6083-6  JN:JOURNAL OF MATERIALS SCIENCE  PY:2012
  TC:6  AU: Reddy, Murali M.;Mohanty, Amar K.;Misra, Manjusri;
7:24:4:1     Prediction of the variation of PGA strength during hydrolysis by a combination of empirical equation, density functional theory calculation, and molecular dynamics simulation
DOI:10.1063/1.4884195  JN:AIP ADVANCES  PY:2014
  TC:0  AU: Chen, Chuan;Ju, Shin-Pon;Huang, Wei-Chun;Lin, Jenn-Sen;Chen, Chien-Chia;
7:24:4:2     Preparation and Characterization of Biodegradable Thermoplastic Films Based on Collagen Hydrolyzate
DOI:10.1002/app.30670  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2010
  TC:5  AU: Haroun, A. A.;
7:24:4:3     Improving the water resistance of biodegradable collagen films
DOI:10.1002/app.36461  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2012
  TC:0  AU: Sommer, Isabell;Kunz, Peter M.;
7:24:4:4     Degradation studies on highly oriented poly(glycolic acid) fibres with different lamellar structures
DOI:10.1016/j.actbio.2010.12.023  JN:ACTA BIOMATERIALIA  PY:2011
  TC:3  AU: de Oca, Horacio Montes;Farrar, David F.;Ward, Ian M.;
7:24:5:1     Preparation and Characterization of Polyethylene Oxide (PEO)/Gelatin Blend for Biomedical Application: Effect of Gamma Radiation
DOI:10.1002/app.32034  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2010
  TC:8  AU: Rahman, Md Arifur;Khan, Mubarak A.;Tareq, Shafi M.;
7:24:5:2     Preparation and characterization of polyvinyl alcohol-polyethylene oxide-carboxymethyl cellulose blend membranes
DOI:10.1002/app.37665  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2013
  TC:8  AU: Gupta, Bhuvanesh;Agarwal, Roopali;Alam, M. Sarwar;
7:24:5:3     Polyvinyl alcohol-polyethylene oxide-carboxymethyl cellulose membranes for drug delivery
DOI:10.1002/app.39144  JN:JOURNAL OF APPLIED POLYMER SCIENCE  PY:2013
  TC:11  AU: Agarwal, Roopali;Alam, M. Sarwar;Gupta, Bhuvanesh;
7:25:1     Formation of magnetic glass in calcium-doped YBaCo2O5.5 cobaltites
DOI:10.1103/PhysRevB.83.214428  JN:PHYSICAL REVIEW B  PY:2011
  TC:12  AU: Sarkar, Tapati;Pralong, V.;Raveau, B.;
7:25:2     On the Location of Host Ca Atoms Responsible for Ferrimagnetism in the Layered Cobaltites YBaCo2O5.5
DOI:10.1021/cm401394x  JN:CHEMISTRY OF MATERIALS  PY:2013
  TC:1  AU: Aurelio, G.;Bardelli, F.;Junqueira Prado, R.;Sanchez, R. D.;Saleta, M. E.;Garbarino, G.;
7:25:3     Magnetisation studies of phase co-existence in Gd-1 (-) xCaxBaCo2O5.5
DOI:10.1016/j.materresbull.2012.01.023  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:7  AU: Thirumurugan, N.;Bharathi, A.;Arulraj, A.;Sundar, C. S.;
7:25:4     Stabilization of antiferromagnetic phase under hydrostatic pressure in layered perovskite cobaltites Nd1-xCaxBaCo2O5.5 (x=0-0.06)
DOI:10.1063/1.4885881  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Pietosa, J.;Szewczyk, A.;Puzniak, R.;Wisniewski, A.;Dabrowski, B.;Kolesnik, S.;
7:25:5     Disorder induced negative magnetization in LaSrCoRuO6
DOI:10.1016/j.jmmm.2010.07.030  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:9  AU: Murthy, P. S. R.;Priolkar, K. R.;Bhobe, P. A.;Das, A.;Sarode, P. R.;Nigam, A. K.;
7:25:6     Tailoring the ground state of the ferrimagnet La2Ni(Ni1/3Sb2/3)O-6
DOI:10.1016/j.jmmm.2013.07.017  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2013
  TC:2  AU: Franco, D. G.;Carbonio, R. E.;Kaul, E. E.;Nieva, G.;
7:25:7     Formation of magnetic glass in calcium-doped YBaCo2O5.5 cobaltites (vol 83, 214428, 2011)
DOI:10.1103/PhysRevB.84.059904  JN:PHYSICAL REVIEW B  PY:2011
  TC:5  AU: Sarkar, Tapati;Pralong, V.;Raveau, B.;
7:25:8     Enhancement of the Curie temperature in NdBaCo2O5.5 by A-site Ca substitution
DOI:10.1103/PhysRevB.86.064434  JN:PHYSICAL REVIEW B  PY:2012
  TC:2  AU: Kolesnik, S.;Dabrowski, B.;Chmaissem, O.;Avci, S.;Hodges, J. P.;Avdeev, M.;Swierczek, K.;
7:25:9     Magnetic phase evolution in Fe substituted GdBaCo2O5.5
DOI:10.1016/j.jmmm.2009.09.007  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:7  AU: Thirumurugan, N.;Bharathi, A.;Sundar, C. S.;
7:25:10     Structure, transport and magnetic properties in La2xSr2-2xCo2xRu2-2xO6
DOI:10.1016/j.jmmm.2010.11.024  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2011
  TC:2  AU: Murthy, P. S. R.;Priolkar, K. R.;Bhobe, P. A.;Das, A.;Sarode, P. R.;Nigam, A. K.;
7:25:11     Influence of the B-site ordering on the magnetic properties of the new La3Co2MO9 double perovskites with M = Nb or Ta
DOI:10.1016/j.materresbull.2010.09.033  JN:MATERIALS RESEARCH BULLETIN  PY:2011
  TC:5  AU: Fuertes, V. C.;Blanco, M. C.;Franco, D. G.;De Paoli, J. M.;Sanchez, R. D.;Carbonio, R. E.;
7:25:12     Crystal field effect on the effective magnetic moment in A(2)CoWO(6) (A = Ca, Sr and Ba)
DOI:10.1016/j.materresbull.2012.02.008  JN:MATERIALS RESEARCH BULLETIN  PY:2012
  TC:5  AU: Lopez, C. A.;Saleta, M. E.;Curiale, J.;Sanchez, R. D.;
7:25:13     Preparation, crystal structure and properties of HoBaCo2-xFexO5+delta
DOI:10.1016/j.materresbull.2013.02.027  JN:MATERIALS RESEARCH BULLETIN  PY:2013
  TC:1  AU: Gavrilova, L. Ya;Volkova, N. E.;Aksenova, T. V.;Cherepanov, V. A.;
7:25:14     Comparison of magnetic and thermoelectric properties of (Nd,Ca)BaCo2O5.5 and (Nd,Ca)CoO3
DOI:10.1063/1.3679561  JN:JOURNAL OF APPLIED PHYSICS  PY:2012
  TC:4  AU: Kolesnik, S.;Dabrowski, B.;Chmaissem, O.;Wojciechowski, K.;Swierczek, K.;
7:25:15     Antiferromagnetic ordering in the double perovskites La2-xSrxCoRuO6
DOI:10.1016/j.jmmm.2009.06.035  JN:JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS  PY:2010
  TC:1  AU: Dlouha, M.;Hejtmanek, J.;Jirak, Z.;Knizek, K.;Tomes, P.;Vratislav, S.;
7:26:1     Confocal fluorescence microscopy in alumina-based ceramics: Where does the signal come from?
DOI:10.1016/j.jeurceramsoc.2009.08.020  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:10  AU: Guo, Sheng;Todd, Richard I.;
7:26:2     Quantitative optical fluorescence microprobe measurements of stresses around indentations in Al2O3 and Al2O3/SiC nanocomposites: The influence of depth resolution and specimen translucency
DOI:10.1016/j.actamat.2010.12.055  JN:ACTA MATERIALIA  PY:2011
  TC:4  AU: Guo, Sheng;Todd, R. I.;
7:26:3     Cr3+ microspectroscopy measurements and modelling of local variations in surface grinding stresses in polycrystalline alumina
DOI:10.1016/j.jeurceramsoc.2010.04.016  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2010
  TC:7  AU: Guo, Sheng;Todd, Richard I.;
7:26:4     High resolution optical microprobe investigation of surface grinding stresses in Al2O3 and Al2O3/SiC nanocomposites
DOI:10.1016/j.jeurceramsoc.2010.08.021  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2011
  TC:6  AU: Guo, Sheng;Limpichaipanit, Apichart;Todd, R. I.;
7:26:5     Quantitative analysis of the residual stress and dislocation density distributions around indentations in alumina and zirconia toughened alumina (ZTA) ceramics
DOI:10.1016/j.jeurceramsoc.2013.09.021  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:3  AU: Huang, S.;Binner, J. G. P.;Vaidhyanathan, B.;Todd, R. I.;
7:26:6     Three-dimensional crack observation, quantification and simulation in a quasi-brittle material
DOI:10.1016/j.actamat.2013.07.011  JN:ACTA MATERIALIA  PY:2013
  TC:10  AU: Mostafavi, M.;Baimpas, N.;Tarleton, E.;Atwood, R. C.;McDonald, S. A.;Korsunsky, A. M.;Marrow, T. J.;
7:26:7     Precise determination of phonon constants in lead-free monoclinic (K0.5Na0.5)NbO3 single crystals
DOI:10.1063/1.4860416  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:1  AU: Rafiq, Muhammad Asif;Supancic, Peter;Costa, M. Elisabete;Vilarinho, Paula M.;Deluca, Marco;
7:26:8     Image-based modelling of binary composites
DOI:10.1016/j.commatsci.2012.02.046  JN:COMPUTATIONAL MATERIALS SCIENCE  PY:2012
  TC:5  AU: Tarleton, E.;Charalambides, M. N.;Leppard, C.;
7:26:9     In situ quantitative three-dimensional characterisation of sub-indentation cracking in polycrystalline alumina
DOI:10.1016/j.jeurceramsoc.2014.04.002  JN:JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Vertyagina, Yelena;Mostafavi, Mahmoud;Reinhard, Christina;Atwood, Robert;Marrow, T. James;
7:27:1     Evaluation of the dislocation density and dislocation character in cold rolled Type 304 steel determined by profile analysis of X-ray diffraction
DOI:10.1016/j.actamat.2011.03.055  JN:ACTA MATERIALIA  PY:2011
  TC:33  AU: Shintani, Takashi;Murata, Yoshinori;
7:27:2     Low strain rate deformation behavior of a Cr-Mn austenitic steel at -80 degrees C
DOI:10.1016/j.actamat.2012.07.055  JN:ACTA MATERIALIA  PY:2012
  TC:9  AU: Sahu, P.;Shee, S. K.;Hamada, A. S.;Rovatti, L.;Sahu, T.;Mahato, B.;Chowdhury, S. Ghosh;Porter, D. A.;Karjalainen, L. P.;
7:27:3     Predicting the critical pre-aging time in ECAP processing of age-hardenable aluminum alloys
DOI:10.1016/j.jallcom.2011.05.025  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2011
  TC:11  AU: Roshan, M. R.;Jahromi, S. A. Jenabali;Ebrahimi, R.;
7:27:4     Reverse transformation of deformation-induced martensite in austenitic stainless steel studied by positron annihilation
DOI:10.1007/s10853-014-8555-y  JN:JOURNAL OF MATERIALS SCIENCE  PY:2014
  TC:1  AU: Dryzek, E.;Sarnek, M.;Wrobel, M.;
7:27:5     Microstructural characteristics and tensile properties of nano-composite Al 2014/4 wt.% Al2O3 produced from machining chips
DOI:10.1016/j.jallcom.2013.03.182  JN:JOURNAL OF ALLOYS AND COMPOUNDS  PY:2013
  TC:5  AU: Roshan, M. R.;Mirzaei, M.;Jahromi, S. A. Jenabali;
7:27:6     Dislocation Density of Lath Martensite in 10Cr-5W Heat-Resistant Steels
DOI:10.2320/matertrans.M2011201  JN:MATERIALS TRANSACTIONS  PY:2011
  TC:2  AU: Cong, Zhenhua;Murata, Yoshinori;
7:27:7     Microstructural evolution of nanocrystalline chips particles produced via large strain machining during ball milling
DOI:10.1016/j.powtec.2013.07.028  JN:POWDER TECHNOLOGY  PY:2013
  TC:0  AU: Roshan, M. R.;Soltanpour, M.;Jahromi, S. A. Jenabali;
7:27:8     Use of positron annihilation measurements to detect the defect beneath worn surface of stainless steel 1.4301 (EN) under dry sliding condition
DOI:10.1016/j.wear.2012.07.006  JN:WEAR  PY:2012
  TC:6  AU: Dryzek, Jerzy;Horodek, Pawel;Wrobel, Miroslaw;
7:28:1     Creation of Nanostuctures by Extreme Conditions: High-Pressure Synthesis of Ultrahard Nanocrystalline Cubic Boron Nitride
DOI:10.1002/adma.201104361  JN:ADVANCED MATERIALS  PY:2012
  TC:24  AU: Solozhenko, Vladimir L.;Kurakevych, Oleksandr O.;Le Godec, Yann;
7:28:2     Elasticity of cubic boron nitride under ambient conditions
DOI:10.1063/1.3561496  JN:JOURNAL OF APPLIED PHYSICS  PY:2011
  TC:12  AU: Zhang, Jin S.;Bass, Jay D.;Taniguchi, Takashi;Goncharov, Alexander F.;Chang, Yun-Yuan;Jacobsen, Steven D.;
7:28:3     Direct coating of cubic boron nitride with titanium powder under high pressure and high temperature
DOI:10.1016/j.matlet.2014.02.107  JN:MATERIALS LETTERS  PY:2014
  TC:0  AU: Wang, Shuang;Guo, Wei;Ma, Hong-an;Jia, Xiaopeng;
7:28:4     Elasticity and hardness of nano-polycrystalline boron nitrides: The apparent Hall-Petch effect
DOI:10.1063/1.4894377  JN:APPLIED PHYSICS LETTERS  PY:2014
  TC:0  AU: Nagakubo, A.;Ogi, H.;Sumiya, H.;Hirao, M.;
7:28:5     Synthesis and formation mechanism of cubic boron nitride nanorods in lithium bromide molten salt
DOI:10.1016/j.matlet.2012.10.016  JN:MATERIALS LETTERS  PY:2013
  TC:2  AU: Zheng, Mingtao;Liu, Yingliang;Wang, Peng;Xiao, Yong;
7:28:6     Elastic constants of cubic and wurtzite boron nitrides
DOI:10.1063/1.4811789  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:3  AU: Nagakubo, A.;Ogi, H.;Sumiya, H.;Kusakabe, K.;Hirao, M.;
7:28:7     Oxidation of ZrB2 Nanoparticles at High Temperature under Low Oxygen Pressure
DOI:10.1111/jace.13030  JN:JOURNAL OF THE AMERICAN CERAMIC SOCIETY  PY:2014
  TC:1  AU: Zhao, Guanghui;Zhang, Xinghong;Shen, Zhenju;Zhang, Dejiong;Hong, Changqing;Li, Jixue;Zhang, Ze;
7:28:8     Boron phosphide under pressure: In situ study by Raman scattering and X-ray diffraction
DOI:10.1063/1.4890231  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:2  AU: Solozhenko, Vladimir L.;Kurakevych, Oleksandr O.;Le Godec, Yann;Kurnosov, Aleksandr V.;Oganov, Artem R.;
7:28:9     Effect of Al additive on the formation of cubic boron nitride in Li3N-hBN system under HPHT
DOI:10.1016/j.jcrysgro.2010.08.051  JN:JOURNAL OF CRYSTAL GROWTH  PY:2010
  TC:3  AU: Guo, W.;Jia, X.;Shang, J.;Xu, H. W.;Ma, H. A.;
7:28:10     Synthesis of nanocrystalline bulk SiO2 stishovite with very high toughness
DOI:10.1016/j.scriptamat.2012.08.028  JN:SCRIPTA MATERIALIA  PY:2012
  TC:8  AU: Nishiyama, Norimasa;Seike, Satoshi;Hamaguchi, Teruo;Irifune, Tetsuo;Matsushita, Masafumi;Takahashi, Manabu;Ohfuji, Hiroaki;Kono, Yoshio;
7:29:1     Bandgap Engineering of Graphene by Physisorbed Adsorbates
DOI:10.1002/adma.201100171  JN:ADVANCED MATERIALS  PY:2011
  TC:35  AU: Kozlov, Sergey M.;Vines, Francesc;Goerling, Andreas;
7:29:2     Bandgap engineering of graphene by corrugation on lattice-mismatched MgO (111)
DOI:10.1039/c2tc00257d  JN:JOURNAL OF MATERIALS CHEMISTRY C  PY:2013
  TC:6  AU: Cho, Sung Beom;Chung, Yong-Chae;
7:29:3     Electrical control of the superconducting-to-insulating transition in graphene-metal hybrids
DOI:10.1038/NMAT3335  JN:NATURE MATERIALS  PY:2012
  TC:31  AU: Allain, Adrien;Han, Zheng;Bouchiat, Vincent;
7:29:4     First-principles calculations of the indigo encapsulation and adsorption by MgO nanotubes
DOI:10.1063/1.4881455  JN:JOURNAL OF APPLIED PHYSICS  PY:2014
  TC:1  AU: Sanchez-Ochoa, F.;Cocoletzi, Gregorio H.;Canto, Gabriel I.;Takeuchi, Noboru;
7:30:1     Three-dimensional off-lattice Monte Carlo simulations on a direct relation between experimental process parameters and fractal dimension of colloidal aggregates
DOI:10.1016/j.jcis.2010.01.008  JN:JOURNAL OF COLLOID AND INTERFACE SCIENCE  PY:2010
  TC:15  AU: Kim, Songkil;Lee, Kwang-Sung;Zachariah, Michael R.;Lee, Donggeun;
7:30:2     Understanding Morphology-Controlled Synthesis of Zinc Nanoparticles and Their Characteristics of Hydrolysis Reaction
DOI:10.1021/la400765j  JN:LANGMUIR  PY:2013
  TC:1  AU: Mun, Byoungjun;Lee, Donggeun;
7:30:3     Microstructure-Controlled Aerosol-Gel Synthesis of ZnO Quantum Dots Dispersed in SiO2 Nanospheres
DOI:10.1021/la203730a  JN:LANGMUIR  PY:2012
  TC:9  AU: Firmansyah, Dudi Adi;Kim, Sang-Gyu;Lee, Kwang-Sung;Zahaf, Riyan;Kim, Yong Ho;Lee, Donggeun;
7:30:4     Formation of colloidal assemblies in suspensions for Pb(Mg1/3Nb2/3)O-3 synthesis: Monte Carlo simulation study
DOI:10.1039/c1sm05228d  JN:SOFT MATTER  PY:2011
  TC:1  AU: Trefalt, Gregor;Tadic, Bosiljka;Kosec, Marija;
7:30:5     Thermogravimetric analysis of the hydrolysis of zinc particles
DOI:10.1016/j.ijhydene.2009.04.017  JN:INTERNATIONAL JOURNAL OF HYDROGEN ENERGY  PY:2010
  TC:9  AU: Lv, Ming;Zhou, Junhu;Yang, Weijuan;Cen, Kefa;
7:30:6     Mechanism of Zn Particle Oxidation by H2O and CO2 in the Presence of ZnO
DOI:10.1021/cm503064f  JN:CHEMISTRY OF MATERIALS  PY:2014
  TC:1  AU: Weibel, David;Jovanovic, Zoran R.;Galvez, Elena;Steinfeld, Aldo;
7:30:7     Multiple time scales and cluster formation mechanisms in charge-heteroaggregation processes
DOI:10.1039/b927150c  JN:SOFT MATTER  PY:2010
  TC:2  AU: Lopez-Lopez, J. M.;Moncho-Jorda, A.;Puertas, A. M.;Schmitt, A.;Hidalgo-Alvarez, R.;
7:31:1     Leakage current and structural analysis of annealed HfO2/La2O3 and CeO2/La2O3 dielectric stacks: A nanoscopic study
DOI:10.1116/1.4876335  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2014
  TC:0  AU: Shubhakar, Kalya;Pey, Kin Leong;Bosman, Michel;Kushvaha, Sunil Singh;O'Shea, Sean Joseph;Kouda, Miyuki;Kakushima, Kuniyuki;Iwai, Hiroshi;
7:31:2     Grain boundary assisted degradation and breakdown study in cerium oxide gate dielectric using scanning tunneling microscopy
DOI:10.1063/1.3553190  JN:APPLIED PHYSICS LETTERS  PY:2011
  TC:12  AU: Shubhakar, K.;Pey, K. L.;Kushvaha, S. S.;O'Shea, S. J.;Raghavan, N.;Bosman, M.;Kouda, M.;Kakushima, K.;Iwai, H.;
7:31:3     Determination of band alignment of pulsed-laser-deposited perovskite titanate/III-V semiconductor heterostructure using X-ray and ultraviolet photoelectron spectroscopy
DOI:10.1063/1.4816356  JN:APPLIED PHYSICS LETTERS  PY:2013
  TC:1  AU: Yang, Zhibin;Huang, Wen;Hao, Jianhua;
7:31:4     Characterization of HfO2/La2O3 layered stacking deposited on Si substrate
DOI:10.1116/1.4770497  JN:JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B  PY:2013
  TC:1  AU: Cao, Duo;Cheng, Xinhong;Jia, Tingting;Xu, Dawei;Wang, Zhongjian;Xia, Chao;Yu, Yuehui;Shen, DaShen;